1 =head1 web-lib-funcs.pl
3 Common functions for Webmin CGI scripts. This file gets in-directly included
4 by all scripts that use web-lib.pl.
9 ui_print_header(undef, 'My Module', '');
10 print 'This is Webmin version ',get_webmin_version(),'<p>\n';
19 $ipv6_module_error = $@;
21 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
22 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
23 %done_foreign_require $webmin_feedback_address
24 $user_skill_level $pragma_no_cache $foreign_args);
26 use vars qw($module_index_name $number_to_month_map $month_to_number_map
27 $umask_already $default_charset $licence_status $os_type
28 $licence_message $script_name $loaded_theme_oo_library
29 $done_web_lib_funcs $os_version $module_index_link
30 $called_from_webmin_core $ipv6_module_error);
32 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
34 Fill the given hash reference with name=value pairs from a file. The required
37 =item file - The file to head, which must be text with each line like name=value
39 =item hash - The hash reference to add values read from the file to.
41 =item order - If given, an array reference to add names to in the order they were read
43 =item lowercase - If set to 1, names are converted to lower case
45 =item split-char - If set, names and values are split on this character instead of =
51 my $split = defined($_[4]) ? $_[4] : "=";
52 my $realfile = &translate_filename($_[0]);
53 &open_readfile(ARFILE, $_[0]) || return 0;
56 my $hash = index($_, "#");
57 my $eq = index($_, $split);
58 if ($hash != 0 && $eq >= 0) {
59 my $n = substr($_, 0, $eq);
60 my $v = substr($_, $eq+1);
62 $_[1]->{$_[3] ? lc($n) : $n} = $v;
63 push(@{$_[2]}, $n) if ($_[2]);
67 $main::read_file_missing{$realfile} = 0; # It exists now
68 if (defined($main::read_file_cache{$realfile})) {
69 %{$main::read_file_cache{$realfile}} = %{$_[1]};
74 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
76 Like read_file, but reads from an in-memory cache if the file has already been
77 read in this Webmin script. Recommended, as it behaves exactly the same as
78 read_file, but can be much faster.
83 my $realfile = &translate_filename($_[0]);
84 if (defined($main::read_file_cache{$realfile})) {
86 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
89 elsif ($main::read_file_missing{$realfile}) {
90 # Doesn't exist, so don't re-try read
94 # Actually read the file
96 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
97 %{$main::read_file_cache{$realfile}} = %d;
98 %{$_[1]} = ( %{$_[1]}, %d );
102 # Flag as non-existant
103 $main::read_file_missing{$realfile} = 1;
109 =head2 read_file_cached_with_stat(file, &hash, [&order], [lowercase], [split-char])
111 Like read_file, but reads from an in-memory cache if the file has already been
112 read in this Webmin script AND has not changed.
115 sub read_file_cached_with_stat
117 my $realfile = &translate_filename($_[0]);
118 my $t = $main::read_file_cache_time{$realfile};
119 my @st = stat($realfile);
120 if ($t && $st[9] != $t) {
121 # Changed, invalidate cache
122 delete($main::read_file_cache{$realfile});
124 my $rv = &read_file_cached(@_);
125 $main::read_file_cache_time{$realfile} = $st[9];
129 =head2 write_file(file, &hash, [join-char])
131 Write out the contents of a hash as name=value lines. The parameters are :
133 =item file - Full path to write to
135 =item hash - A hash reference containing names and values to output
137 =item join-char - If given, names and values are separated by this instead of =
143 my $join = defined($_[2]) ? $_[2] : "=";
144 my $realfile = &translate_filename($_[0]);
145 &read_file($_[0], \%old, \@order);
146 &open_tempfile(ARFILE, ">$_[0]");
147 foreach $k (@order) {
148 if (exists($_[1]->{$k})) {
149 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
150 &error(&text("efilewrite", $realfile, $!));
153 foreach $k (keys %{$_[1]}) {
154 if (!exists($old{$k})) {
155 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
156 &error(&text("efilewrite", $realfile, $!));
159 &close_tempfile(ARFILE);
160 if (defined($main::read_file_cache{$realfile})) {
161 %{$main::read_file_cache{$realfile}} = %{$_[1]};
163 if (defined($main::read_file_missing{$realfile})) {
164 $main::read_file_missing{$realfile} = 0;
168 =head2 html_escape(string)
170 Converts &, < and > codes in text to HTML entities, and returns the new string.
171 This should be used when including data read from other sources in HTML pages.
180 $tmp =~ s/\"/"/g;
181 $tmp =~ s/\'/'/g;
186 =head2 quote_escape(string, [only-quote])
188 Converts ' and " characters in a string into HTML entities, and returns it.
189 Useful for outputing HTML tag values.
194 my ($tmp, $only) = @_;
195 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
196 # convert &, unless it is part of &#nnn; or &foo;
197 $tmp =~ s/&([^#])/&$1/g;
199 $tmp =~ s/&$/&/g;
200 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
201 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
205 =head2 tempname([filename])
207 Returns a mostly random temporary file name, typically under the /tmp/.webmin
208 directory. If filename is given, this will be the base name used. Otherwise
209 a unique name is selected randomly.
214 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
215 $gconfig{'tempdir_'.&get_module_name()} :
216 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
217 $ENV{'TEMP'} && $ENV{'TEMP'} ne "/tmp" ? $ENV{'TEMP'} :
218 $ENV{'TMP'} && $ENV{'TMP'} ne "/tmp" ? $ENV{'TMP'} :
219 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
220 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
221 "$remote_user_info[7]/.tmp" :
222 @remote_user_info ? $tmp_base."-".$remote_user :
223 $< != 0 ? $tmp_base."-".getpwuid($<) :
225 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
226 # On Windows system, just create temp dir if missing
228 mkdir($tmp_dir, 0755) ||
229 &error("Failed to create temp directory $tmp_dir : $!");
233 # On Unix systems, need to make sure temp dir is valid
235 while($tries++ < 10) {
236 my @st = lstat($tmp_dir);
237 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
239 unlink($tmp_dir) || rmdir($tmp_dir) ||
240 system("/bin/rm -rf ".quotemeta($tmp_dir));
242 mkdir($tmp_dir, 0755) || next;
243 chown($<, $(, $tmp_dir);
244 chmod(0755, $tmp_dir);
247 my @st = lstat($tmp_dir);
248 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
252 if (defined($_[0]) && $_[0] !~ /\.\./) {
253 $rv = "$tmp_dir/$_[0]";
256 $main::tempfilecount++;
258 $rv = $tmp_dir."/".int(rand(1000000))."_".
259 $main::tempfilecount."_".$scriptname;
264 =head2 transname([filename])
266 Behaves exactly like tempname, but records the temp file for deletion when the
267 current Webmin script process exits.
272 my $rv = &tempname(@_);
273 push(@main::temporary_files, $rv);
277 =head2 trunc(string, maxlen)
279 Truncates a string to the shortest whole word less than or equal to the
280 given width. Useful for word wrapping.
285 if (length($_[0]) <= $_[1]) {
288 my $str = substr($_[0],0,$_[1]);
297 =head2 indexof(string, value, ...)
299 Returns the index of some value in an array of values, or -1 if it was not
305 for(my $i=1; $i <= $#_; $i++) {
306 if ($_[$i] eq $_[0]) { return $i - 1; }
311 =head2 indexoflc(string, value, ...)
313 Like indexof, but does a case-insensitive match
318 my $str = lc(shift(@_));
319 my @arr = map { lc($_) } @_;
320 return &indexof($str, @arr);
323 =head2 sysprint(handle, [string]+)
325 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
326 as a replacement for print when writing to pipes or sockets.
331 my $fh = &callers_package($_[0]);
332 my $str = join('', @_[1..$#_]);
333 syswrite $fh, $str, length($str);
336 =head2 check_ipaddress(ip)
338 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
343 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
344 $1 >= 0 && $1 <= 255 &&
345 $2 >= 0 && $2 <= 255 &&
346 $3 >= 0 && $3 <= 255 &&
347 $4 >= 0 && $4 <= 255;
350 =head2 check_ip6address(ip)
352 Check if some IPv6 address is properly formatted, and returns 1 if so.
357 my @blocks = split(/:/, $_[0]);
358 return 0 if (@blocks == 0 || @blocks > 8);
360 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
361 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
362 # value is in [0;128].
364 my $where = index($blocks[$ib],"/");
367 my $b = substr($blocks[$ib],0,$where);
368 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
372 # The netmask must take its value in [0;128]
373 return 0 if ($m <0 || $m >128);
375 # Check the different blocks of the address : 16 bits block in hexa notation.
376 # Possibility of 1 empty block or 2 if the address begins with "::".
379 foreach $b (@blocks) {
380 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
381 $empty++ if ($b eq "");
383 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
389 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
391 Prints HTML for an icon image. The parameters are :
393 =item image - URL for the image, like images/foo.gif
395 =item title - Text to appear under the icon
397 =item link - Optional destination for the icon's link
399 =item href - Other HTML attributes to be added to the <a href> for the link
401 =item width - Optional width of the icon
403 =item height - Optional height of the icon
405 =item before-title - HTML to appear before the title link, but which is not actually in the link
407 =item after-title - HTML to appear after the title link, but which is not actually in the link
412 &load_theme_library();
413 if (defined(&theme_generate_icon)) {
414 &theme_generate_icon(@_);
417 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
418 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
419 if ($tconfig{'noicons'}) {
421 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
424 print "$_[6]$_[1]$_[7]\n";
428 print "<table border><tr><td width=48 height=48>\n",
429 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
430 "$w $h></a></td></tr></table>\n";
431 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
434 print "<table border><tr><td width=48 height=48>\n",
435 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
436 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
442 Converts a string to a form ok for putting in a URL, using % escaping.
448 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
452 =head2 un_urlize(string)
454 Converts a URL-encoded string to it's original contents - the reverse of the
462 $rv =~ s/%(..)/pack("c",hex($1))/ge;
466 =head2 include(filename)
468 Read and output the contents of the given file.
474 open(INCLUDE, &translate_filename($_[0])) || return 0;
482 =head2 copydata(in-handle, out-handle)
484 Read from one file handle and write to another, until there is no more to read.
490 $in = &callers_package($in);
491 $out = &callers_package($out);
493 while(read($in, $buf, 1024) > 0) {
494 (print $out $buf) || return 0;
499 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
501 Read data submitted via a POST request using the multipart/form-data coding,
502 and store it in the global %in hash. The optional parameters are :
504 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
506 =item cbfunc - A function reference to call after reading each block of data.
508 =item cbargs - Additional parameters to the callback function.
513 my ($max, $cbfunc, $cbargs) = @_;
514 my ($boundary, $line, $foo, $name, $got, $file);
515 my $err = &text('readparse_max', $max);
516 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
517 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
520 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
522 <STDIN>; # skip first boundary
525 # Read section headers
529 $got += length($line);
530 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
531 if ($max && $got > $max) {
536 if ($line =~ /^(\S+):\s*(.*)$/) {
537 $header{$lastheader = lc($1)} = $2;
539 elsif ($line =~ /^\s+(.*)$/) {
540 $header{$lastheader} .= $line;
544 # Parse out filename and type
545 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
547 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
552 $foo = $name . "_$1";
559 &error($text{'readparse_cdheader'});
561 if ($header{'content-type'} =~ /^([^\s;]+)/) {
562 $foo = $name . "_content_type";
565 $file = $in{$name."_filename"};
568 $in{$name} .= "\0" if (defined($in{$name}));
571 $got += length($line);
572 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
574 if ($max && $got > $max) {
575 #print STDERR "over limit of $max\n";
580 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
585 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
586 if (index($line, $boundary) != -1) { last; }
589 chop($in{$name}); chop($in{$name});
590 if (index($line,"$boundary--") != -1) { last; }
592 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
595 =head2 ReadParse([&hash], [method], [noplus])
597 Fills the given hash reference with CGI parameters, or uses the global hash
598 %in if none is given. Also sets the global variables $in and @in. The other
601 =item method - For use of this HTTP method, such as GET
603 =item noplus - Don't convert + in parameters to spaces.
608 my $a = $_[0] || \%in;
610 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
612 if ($meth eq 'POST') {
613 my $clen = $ENV{'CONTENT_LENGTH'};
614 &read_fully(STDIN, \$in, $clen) == $clen ||
615 &error("Failed to read POST input : $!");
617 if ($ENV{'QUERY_STRING'}) {
618 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
619 else { $in = $ENV{'QUERY_STRING'}; }
621 @in = split(/\&/, $in);
622 foreach my $i (@in) {
623 my ($k, $v) = split(/=/, $i, 2);
628 $k =~ s/%(..)/pack("c",hex($1))/ge;
629 $v =~ s/%(..)/pack("c",hex($1))/ge;
630 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
634 =head2 read_fully(fh, &buffer, length)
636 Read data from some file handle up to the given length, even in the face
637 of partial reads. Reads the number of bytes read. Stores received data in the
638 string pointed to be the buffer reference.
643 my ($fh, $buf, $len) = @_;
644 $fh = &callers_package($fh);
647 my $r = read(STDIN, $$buf, $len-$got, $got);
654 =head2 read_parse_mime_callback(size, totalsize, upload-id)
656 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
657 the file on every 1% change though. For internal use by the upload progress
661 sub read_parse_mime_callback
663 my ($size, $totalsize, $filename, $id) = @_;
664 return if ($gconfig{'no_upload_tracker'});
667 # Create the upload tracking directory - if running as non-root, this has to
668 # be under the user's home
671 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
672 $vardir = "$uinfo[7]/.tmp";
675 $vardir = $ENV{'WEBMIN_VAR'};
678 &make_dir($vardir, 0755);
681 # Remove any upload.* files more than 1 hour old
682 if (!$main::read_parse_mime_callback_flushed) {
684 opendir(UPDIR, $vardir);
685 foreach my $f (readdir(UPDIR)) {
686 next if ($f !~ /^upload\./);
687 my @st = stat("$vardir/$f");
688 if ($st[9] < $now-3600) {
689 unlink("$vardir/$f");
693 $main::read_parse_mime_callback_flushed++;
696 # Only update file once per percent
697 my $upfile = "$vardir/upload.$id";
698 if ($totalsize && $size >= 0) {
699 my $pc = int(100 * $size / $totalsize);
700 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
703 $main::read_parse_mime_callback_pc{$upfile} = $pc;
707 &open_tempfile(UPFILE, ">$upfile");
708 print UPFILE $size,"\n";
709 print UPFILE $totalsize,"\n";
710 print UPFILE $filename,"\n";
711 &close_tempfile(UPFILE);
714 =head2 read_parse_mime_javascript(upload-id, [&fields])
716 Returns an onSubmit= Javascript statement to popup a window for tracking
717 an upload with the given ID. For internal use by the upload progress tracker.
720 sub read_parse_mime_javascript
722 my ($id, $fields) = @_;
723 return "" if ($gconfig{'no_upload_tracker'});
724 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
726 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
727 return "onSubmit='if ($if) { $opener }'";
730 return "onSubmit='$opener'";
734 =head2 PrintHeader(charset)
736 Outputs the HTTP headers for an HTML page. The optional charset parameter
737 can be used to set a character set. Normally this function is not called
738 directly, but is rather called by ui_print_header or header.
743 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
744 print "pragma: no-cache\n";
745 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
746 print "Cache-Control: no-store, no-cache, must-revalidate\n";
747 print "Cache-Control: post-check=0, pre-check=0\n";
749 if (defined($_[0])) {
750 print "Content-type: text/html; Charset=$_[0]\n\n";
753 print "Content-type: text/html\n\n";
757 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
759 Outputs a Webmin HTML page header with a title, including HTTP headers. The
762 =item title - The text to show at the top of the page
764 =item image - An image to show instead of the title text. This is typically left blank.
766 =item help - If set, this is the name of a help page that will be linked to in the title.
768 =item config - If set to 1, the title will contain a link to the module's config page.
770 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
772 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
774 =item rightside - HTML to be shown on the right-hand side of the title. Can contain multiple lines, separated by <br>. Typically this is used for links to stop, start or restart servers.
776 =item head-stuff - HTML to be included in the <head> section of the page.
778 =item body-stuff - HTML attributes to be include in the <body> tag.
780 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
785 return if ($main::done_webmin_header++);
787 my $charset = defined($main::force_charset) ? $main::force_charset
789 &PrintHeader($charset);
790 &load_theme_library();
791 if (defined(&theme_header)) {
792 $module_name = &get_module_name();
794 $miniserv::page_capture = 1;
797 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
800 if (defined(&theme_prehead)) {
804 print "<meta http-equiv=\"Content-Type\" ",
805 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
808 my $title = &get_html_title($_[0]);
809 print "<title>$title</title>\n";
810 print $_[7] if ($_[7]);
811 print &get_html_status_line(0);
813 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
814 if ($tconfig{'headinclude'}) {
815 print &read_file_contents(
816 "$theme_root_directory/$tconfig{'headinclude'}");
819 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
820 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
821 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
822 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
823 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
824 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
825 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
827 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
829 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
830 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
831 if (defined(&theme_prebody)) {
834 my $hostname = &get_display_hostname();
835 my $version = &get_webmin_version();
836 my $prebody = $tconfig{'prebody'};
838 $prebody =~ s/%HOSTNAME%/$hostname/g;
839 $prebody =~ s/%VERSION%/$version/g;
840 $prebody =~ s/%USER%/$remote_user/g;
841 $prebody =~ s/%OS%/$os_type $os_version/g;
844 if ($tconfig{'prebodyinclude'}) {
846 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
853 print $tconfig{'preheader'};
854 my %this_module_info = &get_module_info(&get_module_name());
855 print "<table class='header' width=100%><tr>\n";
856 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
857 print "<td id='headln1' colspan=3 align=center>\n";
858 print &get_html_status_line(1);
859 print "</td></tr> <tr>\n";
861 print "<td id='headln2l' width=15% valign=top align=left>";
862 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
863 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
864 "$text{'header_servers'}</a><br>\n";
866 if (!$_[5] && !$tconfig{'noindex'}) {
867 my @avail = &get_available_module_infos(1);
868 my $nolo = $ENV{'ANONYMOUS_USER'} ||
869 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
870 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
871 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
873 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
874 "$text{'main_logout'}</a><br>";
876 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
877 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
878 "$text{'main_switch'}</a><br>";
880 elsif (!$gconfig{'gotoone'} || @avail > 1) {
881 print "<a href='$gconfig{'webprefix'}/?cat=",
882 $this_module_info{'category'},
883 "'>$text{'header_webmin'}</a><br>\n";
886 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
887 my $idx = $this_module_info{'index_link'};
888 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
889 my $mt = $module_index_name || $text{'header_module'};
890 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
892 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
893 !$tconfig{'nohelp'}) {
894 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
897 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
898 !$tconfig{'nohelp'}) {
899 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
902 my %access = &get_module_acl();
903 if (!$access{'noconfig'} && !$config{'noprefs'}) {
904 my $cprog = $user_module_config_directory ?
905 "uconfig.cgi" : "config.cgi";
906 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
907 &get_module_name()."\">",
908 $text{'header_config'},"</a><br>\n";
913 # Title is a single image
914 print "<td id='headln2c' align=center width=70%>",
915 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
919 my $ts = defined($tconfig{'titlesize'}) ?
920 $tconfig{'titlesize'} : "+2";
921 print "<td id='headln2c' align=center width=70%>",
922 ($ts ? "<font size=$ts>" : ""),$_[0],
923 ($ts ? "</font>" : "");
924 print "<br>$_[9]\n" if ($_[9]);
927 print "<td id='headln2r' width=15% valign=top align=right>";
929 print "</td></tr></table>\n";
930 print $tconfig{'postheader'};
932 $miniserv::page_capture = 1;
935 =head2 get_html_title(title)
937 Returns the full string to appear in the HTML <title> block.
944 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
945 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
946 my $host = &get_display_hostname();
947 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
948 $title = sprintf "%s : %s on %s (%s %s)\n",
949 $msg, $remote_user, $host,
950 $os_type, $os_version;
952 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
953 $title = sprintf "%s on %s (%s %s)\n",
955 $os_type, $os_version;
960 if ($gconfig{'showlogin'} && $remote_user) {
961 $title = $remote_user.($title ? " : ".$title : "");
963 if ($gconfig{'showhost'}) {
964 $title = $host.($title ? " : ".$title : "");
969 =head2 get_html_framed_title
971 Returns the title text for a framed theme main page.
974 sub get_html_framed_title
977 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
978 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
980 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
981 # Alternate title mode requested
982 $title = sprintf "%s on %s (%s %s)\n",
983 $remote_user, &get_display_hostname(),
984 $os_type, $os_version;
987 # Title like 'Webmin x.yy on hostname (Linux 6)'
988 if ($os_version eq "*") {
992 $ostr = "$os_type $os_version";
994 my $host = &get_display_hostname();
995 my $ver = &get_webmin_version();
996 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
997 $gconfig{'showhost'} ? &text('main_title3', $ver, $ostr) :
998 &text('main_title', $ver, $host, $ostr);
999 if ($gconfig{'showlogin'}) {
1000 $title = $remote_user.($title ? " : ".$title : "");
1002 if ($gconfig{'showhost'}) {
1003 $title = $host.($title ? " : ".$title : "");
1009 =head2 get_html_status_line(text-only)
1011 Returns HTML for a script block that sets the status line, or if text-only
1012 is set to 1, just return the status line text.
1015 sub get_html_status_line
1017 my ($textonly) = @_;
1018 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
1019 # Disabled in this mode
1022 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
1023 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
1024 my $line = &text('header_statusmsg',
1025 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
1027 ($ENV{'SSL_USER'} ? " (SSL certified)" :
1028 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1029 $text{'programname'},
1030 &get_webmin_version(),
1031 &get_display_hostname(),
1032 $os_type.($os_version eq "*" ? "" :" $os_version"));
1037 $line =~ s/\r|\n//g;
1038 return "<script language=JavaScript type=text/javascript>\n".
1039 "defaultStatus=\""."e_escape($line)."\";\n".
1044 =head2 popup_header([title], [head-stuff], [body-stuff], [no-body])
1046 Outputs a page header, suitable for a popup window. If no title is given,
1047 absolutely no decorations are output. Also useful in framesets. The parameters
1050 =item title - Title text for the popup window.
1052 =item head-stuff - HTML to appear in the <head> section.
1054 =item body-stuff - HTML attributes to be include in the <body> tag.
1056 =item no-body - If set to 1, don't generate a body tag
1061 return if ($main::done_webmin_header++);
1063 my $charset = defined($main::force_charset) ? $main::force_charset
1065 &PrintHeader($charset);
1066 &load_theme_library();
1067 if (defined(&theme_popup_header)) {
1068 &theme_popup_header(@_);
1069 $miniserv::page_capture = 1;
1072 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1075 if (defined(&theme_popup_prehead)) {
1076 &theme_popup_prehead(@_);
1078 print "<title>$_[0]</title>\n";
1080 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1081 if ($tconfig{'headinclude'}) {
1082 print &read_file_contents(
1083 "$theme_root_directory/$tconfig{'headinclude'}");
1086 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1087 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1088 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1089 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1090 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1091 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1092 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1095 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1096 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1097 if (defined(&theme_popup_prebody)) {
1098 &theme_popup_prebody(@_);
1101 $miniserv::page_capture = 1;
1104 =head2 footer([page, name]+, [noendbody])
1106 Outputs the footer for a Webmin HTML page, possibly with links back to other
1107 pages. The links are specified by pairs of parameters, the first of which is
1108 a link destination, and the second the link text. For example :
1110 footer('/', 'Webmin index', '', 'Module menu');
1115 $miniserv::page_capture = 0;
1116 &load_theme_library();
1117 my %this_module_info = &get_module_info(&get_module_name());
1118 if (defined(&theme_footer)) {
1119 $module_name = &get_module_name(); # Old themes use these
1120 %module_info = %this_module_info;
1124 for(my $i=0; $i+1<@_; $i+=2) {
1126 if ($url ne '/' || !$tconfig{'noindex'}) {
1128 $url = "/?cat=$this_module_info{'category'}";
1130 elsif ($url eq '' && &get_module_name()) {
1131 $url = "/".&get_module_name()."/".
1132 $this_module_info{'index_link'};
1134 elsif ($url =~ /^\?/ && &get_module_name()) {
1135 $url = "/".&get_module_name()."/$url";
1137 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1139 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1144 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1149 my $postbody = $tconfig{'postbody'};
1151 my $hostname = &get_display_hostname();
1152 my $version = &get_webmin_version();
1153 my $os_type = $gconfig{'real_os_type'} ||
1154 $gconfig{'os_type'};
1155 my $os_version = $gconfig{'real_os_version'} ||
1156 $gconfig{'os_version'};
1157 $postbody =~ s/%HOSTNAME%/$hostname/g;
1158 $postbody =~ s/%VERSION%/$version/g;
1159 $postbody =~ s/%USER%/$remote_user/g;
1160 $postbody =~ s/%OS%/$os_type $os_version/g;
1161 print "$postbody\n";
1163 if ($tconfig{'postbodyinclude'}) {
1165 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1171 if (defined(&theme_postbody)) {
1172 &theme_postbody(@_);
1174 print "</body></html>\n";
1178 =head2 popup_footer([no-body])
1180 Outputs html for a footer for a popup window, started by popup_header.
1185 $miniserv::page_capture = 0;
1186 &load_theme_library();
1187 if (defined(&theme_popup_footer)) {
1188 &theme_popup_footer(@_);
1197 =head2 load_theme_library
1199 Immediately loads the current theme's theme.pl file. Not generally useful for
1200 most module developers, as this is called automatically by the header function.
1203 sub load_theme_library
1205 return if (!$current_theme || $loaded_theme_library++);
1206 for(my $i=0; $i<@theme_root_directories; $i++) {
1207 if ($theme_configs[$i]->{'functions'}) {
1208 do $theme_root_directories[$i]."/".
1209 $theme_configs[$i]->{'functions'};
1214 =head2 redirect(url)
1216 Output HTTP headers to redirect the browser to some page. The url parameter is
1217 typically a relative URL like index.cgi or list_users.cgi.
1222 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1223 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1224 ":$ENV{'SERVER_PORT'}";
1225 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1226 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1228 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1229 # Absolute URL (like http://...)
1232 elsif ($_[0] =~ /^\//) {
1233 # Absolute path (like /foo/bar.cgi)
1234 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1236 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1237 # Relative URL (like foo.cgi)
1238 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1241 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1243 &load_theme_library();
1244 if (defined(&theme_redirect)) {
1245 $module_name = &get_module_name(); # Old themes use these
1246 %module_info = &get_module_info($module_name);
1247 &theme_redirect($_[0], $url);
1250 print "Location: $url\n\n";
1254 =head2 kill_byname(name, signal)
1256 Finds a process whose command line contains the given name (such as httpd), and
1257 sends some signal to it. The signal can be numeric (like 9) or named
1263 my @pids = &find_byname($_[0]);
1264 return scalar(@pids) if (&is_readonly_mode());
1265 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1266 if ($gconfig{'debug_what_procs'});
1267 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1271 =head2 kill_byname_logged(name, signal)
1273 Like kill_byname, but also logs the killing.
1276 sub kill_byname_logged
1278 my @pids = &find_byname($_[0]);
1279 return scalar(@pids) if (&is_readonly_mode());
1280 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1284 =head2 find_byname(name)
1286 Finds processes searching for the given name in their command lines, and
1287 returns a list of matching PIDs.
1292 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1293 # Linux with /proc filesystem .. use cmdline files, as this is
1294 # faster than forking
1296 opendir(PROCDIR, "/proc");
1297 foreach my $f (readdir(PROCDIR)) {
1298 if ($f eq int($f) && $f != $$) {
1299 my $line = &read_file_contents("/proc/$f/cmdline");
1300 if ($line =~ /$_[0]/) {
1309 if (&foreign_check("proc")) {
1310 # Call the proc module
1311 &foreign_require("proc", "proc-lib.pl");
1312 if (defined(&proc::list_processes)) {
1313 my @procs = &proc::list_processes();
1315 foreach my $p (@procs) {
1316 if ($p->{'args'} =~ /$_[0]/) {
1317 push(@pids, $p->{'pid'});
1320 @pids = grep { $_ != $$ } @pids;
1325 # Fall back to running a command
1327 $cmd = $gconfig{'find_pid_command'};
1328 $cmd =~ s/NAME/"$_[0]"/g;
1329 $cmd = &translate_command($cmd);
1330 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1331 @pids = grep { $_ != $$ } @pids;
1335 =head2 error([message]+)
1337 Display an error message and exit. This should be used by CGI scripts that
1338 encounter a fatal error or invalid user input to notify users of the problem.
1339 If error_setup has been called, the displayed error message will be prefixed
1340 by the message setup using that function.
1345 $main::no_miniserv_userdb = 1;
1346 my $msg = join("", @_);
1347 $msg =~ s/<[^>]*>//g;
1348 if (!$main::error_must_die) {
1349 print STDERR "Error: ",$msg,"\n";
1351 &load_theme_library();
1352 if ($main::error_must_die) {
1353 if ($gconfig{'error_stack'}) {
1354 print STDERR "Error: ",$msg,"\n";
1355 for(my $i=0; my @stack = caller($i); $i++) {
1356 print STDERR "File: $stack[1] Line: $stack[2] ",
1357 "Function: $stack[3]\n";
1362 elsif (!$ENV{'REQUEST_METHOD'}) {
1363 # Show text-only error
1364 print STDERR "$text{'error'}\n";
1365 print STDERR "-----\n";
1366 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1368 print STDERR "-----\n";
1369 if ($gconfig{'error_stack'}) {
1371 print STDERR $text{'error_stack'},"\n";
1372 for(my $i=0; my @stack = caller($i); $i++) {
1373 print STDERR &text('error_stackline',
1374 $stack[1], $stack[2], $stack[3]),"\n";
1379 elsif (defined(&theme_error)) {
1383 &header($text{'error'}, "");
1385 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1387 if ($gconfig{'error_stack'}) {
1389 print "<h3>$text{'error_stack'}</h3>\n";
1391 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1392 "<td><b>$text{'error_line'}</b></td> ",
1393 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1394 for($i=0; my @stack = caller($i); $i++) {
1396 print "<td>$stack[1]</td>\n";
1397 print "<td>$stack[2]</td>\n";
1398 print "<td>$stack[3]</td>\n";
1404 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1405 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1411 &unlock_all_files();
1412 &cleanup_tempnames();
1416 =head2 popup_error([message]+)
1418 This function is almost identical to error, but displays the message with HTML
1419 headers suitable for a popup window.
1424 $main::no_miniserv_userdb = 1;
1425 &load_theme_library();
1426 if ($main::error_must_die) {
1429 elsif (defined(&theme_popup_error)) {
1430 &theme_popup_error(@_);
1433 &popup_header($text{'error'}, "");
1434 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1437 &unlock_all_files();
1438 &cleanup_tempnames();
1442 =head2 error_setup(message)
1444 Registers a message to be prepended to all error messages displayed by the
1450 $main::whatfailed = $_[0];
1453 =head2 wait_for(handle, regexp, regexp, ...)
1455 Reads from the input stream until one of the regexps matches, and returns the
1456 index of the matching regexp, or -1 if input ended before any matched. This is
1457 very useful for parsing the output of interactive programs, and can be used with
1458 a two-way pipe to feed input to a program in response to output matched by
1461 If the matching regexp contains bracketed sub-expressions, their values will
1462 be placed in the global array @matches, indexed starting from 1. You cannot
1463 use the Perl variables $1, $2 and so on to capture matches.
1467 $rv = wait_for($loginfh, "username:");
1469 error("Didn't get username prompt");
1471 print $loginfh "joe\n";
1472 $rv = wait_for($loginfh, "password:");
1474 error("Didn't get password prompt");
1476 print $loginfh "smeg\n";
1481 my ($c, $i, $sw, $rv, $ha);
1482 undef($wait_for_input);
1483 if ($wait_for_debug) {
1484 print STDERR "wait_for(",join(",", @_),")\n";
1486 $ha = &callers_package($_[0]);
1487 if ($wait_for_debug) {
1488 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1493 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1494 " \$wait_for_input .= \$c;\n";
1495 if ($wait_for_debug) {
1496 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1498 for($i=1; $i<@_; $i++) {
1499 $sw = $i>1 ? "elsif" : "if";
1500 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1503 " if (defined(\$hit)) {\n".
1504 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1510 &error("wait_for error : $@\n");
1515 =head2 fast_wait_for(handle, string, string, ...)
1517 This function behaves very similar to wait_for (documented above), but instead
1518 of taking regular expressions as parameters, it takes strings. As soon as the
1519 input contains one of them, it will return the index of the matching string.
1520 If the input ends before any match, it returns -1.
1525 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1526 for($i=1; $i<@_; $i++) {
1527 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1531 if (($c = getc($ha)) eq "") {
1532 &error("fast_wait_for read error : $!");
1535 if (length($inp) > $maxlen) {
1536 $inp = substr($inp, length($inp)-$maxlen);
1538 $inpl = length($inp);
1539 for($i=1; $i<@_; $i++) {
1540 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1547 =head2 has_command(command)
1549 Returns the full path to the executable if some command is in the path, or
1550 undef if not found. If the given command is already an absolute path and
1551 exists, then the same path will be returned.
1556 if (!$_[0]) { return undef; }
1557 if (exists($main::has_command_cache{$_[0]})) {
1558 return $main::has_command_cache{$_[0]};
1561 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1562 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1563 # Absolute path given - just use it
1564 my $t = &translate_filename($_[0]);
1565 $rv = (-x $t && !-d _) ? $_[0] : undef;
1568 # Check each directory in the path
1570 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1571 next if ($donedir{$d}++);
1572 $d =~ s/$slash$// if ($d ne $slash);
1573 my $t = &translate_filename("$d/$_[0]");
1574 if (-x $t && !-d _) {
1575 $rv = $d.$slash.$_[0];
1578 if ($gconfig{'os_type'} eq 'windows') {
1579 foreach my $sfx (".exe", ".com", ".bat") {
1580 my $t = &translate_filename("$d/$_[0]").$sfx;
1581 if (-r $t && !-d _) {
1582 $rv = $d.$slash.$_[0].$sfx;
1589 $main::has_command_cache{$_[0]} = $rv;
1593 =head2 make_date(seconds, [date-only], [fmt])
1595 Converts a Unix date/time in seconds to a human-readable form, by default
1596 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1598 =item seconds - Unix time is seconds to convert.
1600 =item date-only - If set to 1, exclude the time from the returned string.
1602 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1607 my ($secs, $only, $fmt) = @_;
1608 my @tm = localtime($secs);
1611 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1613 if ($fmt eq 'dd/mon/yyyy') {
1614 $date = sprintf "%2.2d/%s/%4.4d",
1615 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1617 elsif ($fmt eq 'dd/mm/yyyy') {
1618 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1620 elsif ($fmt eq 'mm/dd/yyyy') {
1621 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1623 elsif ($fmt eq 'yyyy/mm/dd') {
1624 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1626 elsif ($fmt eq 'd. mon yyyy') {
1627 $date = sprintf "%d. %s %4.4d",
1628 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1630 elsif ($fmt eq 'dd.mm.yyyy') {
1631 $date = sprintf "%2.2d.%2.2d.%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1633 elsif ($fmt eq 'yyyy-mm-dd') {
1634 $date = sprintf "%4.4d-%2.2d-%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1637 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1642 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1644 Return HTML for a button that pops up a file chooser when clicked, and places
1645 the selected filename into another HTML field. The parameters are :
1647 =item input - Name of the form field to store the filename in.
1649 =item type - 0 for file or directory chooser, or 1 for directory only.
1651 =item form - Index of the form containing the button.
1653 =item chroot - If set to 1, the chooser will be limited to this directory.
1655 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1658 sub file_chooser_button
1660 return &theme_file_chooser_button(@_)
1661 if (defined(&theme_file_chooser_button));
1662 my $form = defined($_[2]) ? $_[2] : 0;
1663 my $chroot = defined($_[3]) ? $_[3] : "/";
1664 my $add = int($_[4]);
1665 my ($w, $h) = (400, 300);
1666 if ($gconfig{'db_sizefile'}) {
1667 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1669 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/chooser.cgi?add=$add&type=$_[1]&chroot=$chroot&file=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=no,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
1672 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1674 Returns HTML for a button that will popup a chooser window of some kind. The
1677 =item url - Base URL of the popup window's contents
1679 =item width - Width of the window in pixels
1681 =item height - Height in pixels
1683 =item scrollbars - Set to 1 if the window should have scrollbars
1685 The field-mappings parameter is an array ref of array refs containing
1687 =item - Attribute to assign field to in the popup window
1689 =item - Form field name
1691 =item - CGI parameter to URL for value, if any
1694 sub popup_window_button
1696 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1697 my ($url, $w, $h, $scroll, $fields) = @_;
1698 my $scrollyn = $scroll ? "yes" : "no";
1699 my $rv = "<input type=button onClick='";
1700 foreach my $m (@$fields) {
1701 $rv .= "$m->[0] = form.$m->[1]; ";
1703 my $sep = $url =~ /\?/ ? "&" : "?";
1704 $rv .= "chooser = window.open(\"$url\"";
1705 foreach my $m (@$fields) {
1707 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1711 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1712 foreach my $m (@$fields) {
1713 $rv .= "chooser.$m->[0] = $m->[0]; ";
1714 $rv .= "window.$m->[0] = $m->[0]; ";
1716 $rv .= "' value=\"...\">";
1720 =head2 read_acl(&user-module-hash, &user-list-hash, [&only-users])
1722 Reads the Webmin acl file into the given hash references. The first is indexed
1723 by a combined key of username,module , with the value being set to 1 when
1724 the user has access to that module. The second is indexed by username, with
1725 the value being an array ref of allowed modules.
1727 This function is deprecated in favour of foreign_available, which performs a
1728 more comprehensive check of module availability.
1730 If the only-users array ref parameter is given, the results may be limited to
1731 users in that list of names.
1736 my ($usermod, $userlist, $only) = @_;
1737 if (!%main::acl_hash_cache) {
1738 # Read from local files
1740 open(ACL, &acl_filename());
1742 if (/^([^:]+):\s*(.*)/) {
1744 my @mods = split(/\s+/, $2);
1745 foreach my $m (@mods) {
1746 $main::acl_hash_cache{$user,$m}++;
1748 $main::acl_array_cache{$user} = \@mods;
1753 %$usermod = %main::acl_hash_cache if ($usermod);
1754 %$userlist = %main::acl_array_cache if ($userlist);
1757 my $userdb = &get_userdb_string();
1758 my ($dbh, $proto, $prefix, $args) =
1759 $userdb ? &connect_userdb($userdb) : ( );
1761 if ($proto eq "mysql" || $proto eq "postgresql") {
1762 # Select usernames and modules from SQL DB
1763 my $cmd = $dbh->prepare(
1764 "select webmin_user.name,webmin_user_attr.value ".
1765 "from webmin_user,webmin_user_attr ".
1766 "where webmin_user.id = webmin_user_attr.id ".
1767 "and webmin_user_attr.attr = 'modules' ".
1768 ($only ? " and webmin_user.name in (".
1769 join(",", map { "'$_'" } @$only).")" : ""));
1770 if ($cmd && $cmd->execute()) {
1771 while(my ($user, $mods) = $cmd->fetchrow()) {
1772 my @mods = split(/\s+/, $mods);
1773 foreach my $m (@mods) {
1774 $usermod->{$user,$m}++ if ($usermod);
1776 $userlist->{$user} = \@mods if ($userlist);
1779 $cmd->finish() if ($cmd);
1781 elsif ($proto eq "ldap") {
1782 # Find users in LDAP
1783 my $filter = '(objectClass='.$args->{'userclass'}.')';
1786 "(|".join("", map { "(cn=$_)" } @$only).")";
1787 $filter = "(&".$filter.$ufilter.")";
1789 my $rv = $dbh->search(
1793 attrs => [ 'cn', 'webminModule' ]);
1794 if ($rv && !$rv->code) {
1795 foreach my $u ($rv->all_entries) {
1796 my $user = $u->get_value('cn');
1797 my @mods =$u->get_value('webminModule');
1798 foreach my $m (@mods) {
1799 $usermod->{$user,$m}++ if ($usermod);
1801 $userlist->{$user} = \@mods if ($userlist);
1805 &disconnect_userdb($userdb, $dbh);
1811 Returns the file containing the webmin ACL, which is usually
1812 /etc/webmin/webmin.acl.
1817 return "$config_directory/webmin.acl";
1822 Does nothing, but kept around for compatability.
1829 =head2 get_miniserv_config(&hash)
1831 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1832 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1836 sub get_miniserv_config
1838 return &read_file_cached(
1839 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1842 =head2 put_miniserv_config(&hash)
1844 Writes out the Webmin webserver configuration file from the contents of
1845 the given hash ref. This should be initially populated by get_miniserv_config,
1848 get_miniserv_config(\%miniserv);
1849 $miniserv{'port'} = 10005;
1850 put_miniserv_config(\%miniserv);
1854 sub put_miniserv_config
1856 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1860 =head2 restart_miniserv([nowait])
1862 Kill the old miniserv process and re-start it, then optionally waits for
1863 it to restart. This will apply all configuration settings.
1866 sub restart_miniserv
1869 return undef if (&is_readonly_mode());
1871 &get_miniserv_config(\%miniserv) || return;
1872 if ($main::webmin_script_type eq 'web' && !$ENV{"MINISERV_CONFIG"} &&
1873 !$ENV{'MINISERV_PID'}) {
1874 # Running under some web server other than miniserv, so do nothing
1879 if ($gconfig{'os_type'} ne 'windows') {
1880 # On Unix systems, we can restart with a signal
1881 my ($pid, $addr, $i);
1882 $miniserv{'inetd'} && return;
1883 my @oldst = stat($miniserv{'pidfile'});
1884 $pid = $ENV{'MINISERV_PID'};
1885 if (!$pid || !kill(0, $pid)) {
1886 if (!open(PID, $miniserv{'pidfile'})) {
1887 print STDERR "PID file $miniserv{'pidfile'} does ",
1894 print STDERR "Invalid PID file $miniserv{'pidfile'}\n";
1897 if (!kill(0, $pid)) {
1898 print STDERR "PID $pid from file $miniserv{'pidfile'} ",
1904 # Just signal miniserv to restart
1905 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1907 # Wait till new PID is written, indicating a restart
1908 for($i=0; $i<60; $i++) {
1910 my @newst = stat($miniserv{'pidfile'});
1911 last if ($newst[9] != $oldst[9]);
1913 $i < 60 || &error("Webmin server did not write new PID file");
1915 ## Totally kill the process and re-run it
1916 #$SIG{'TERM'} = 'IGNORE';
1917 #&kill_logged('TERM', $pid);
1918 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1921 # On Windows, we need to use the flag file
1922 open(TOUCH, ">$miniserv{'restartflag'}");
1927 # Wait for miniserv to come back up
1928 my $addr = $miniserv{'bind'} || "127.0.0.1";
1930 for($i=0; $i<20; $i++) {
1933 &open_socket($addr, $miniserv{'port'}, STEST, \$err);
1935 last if (!$err && ++$ok >= 2);
1937 $i < 20 || &error("Failed to restart Webmin server!");
1941 =head2 reload_miniserv
1943 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1944 configuration files. Not all changes will be applied though, such as the
1945 IP addresses and ports to accept connections on.
1950 return undef if (&is_readonly_mode());
1952 &get_miniserv_config(\%miniserv) || return;
1953 if ($main::webmin_script_type eq 'web' && !$ENV{"MINISERV_CONFIG"} &&
1954 !$ENV{'MINISERV_PID'}) {
1955 # Running under some web server other than miniserv, so do nothing
1959 if ($gconfig{'os_type'} ne 'windows') {
1960 # Send a USR1 signal to re-read the config
1961 my ($pid, $addr, $i);
1962 $miniserv{'inetd'} && return;
1963 $pid = $ENV{'MINISERV_PID'};
1964 if (!$pid || !kill(0, $pid)) {
1965 if (!open(PID, $miniserv{'pidfile'})) {
1966 print STDERR "PID file $miniserv{'pidfile'} does ",
1973 print STDERR "Invalid PID file $miniserv{'pidfile'}\n";
1976 if (!kill(0, $pid)) {
1977 print STDERR "PID $pid from file $miniserv{'pidfile'} ",
1982 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1984 # Make sure this didn't kill Webmin!
1986 if (!kill(0, $pid)) {
1987 print STDERR "USR1 signal killed Webmin - restarting\n";
1988 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1992 # On Windows, we need to use the flag file
1993 open(TOUCH, ">$miniserv{'reloadflag'}");
1998 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
2000 Returns 1 if some module is supported on the current operating system, or the
2001 OS supplies as parameters. The parameters are :
2003 =item minfo - A hash ref of module information, as returned by get_module_info
2005 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
2007 =item os-version - The Webmin OS version to use, such as 13.0
2009 =item api-only - If set to 1, considers a module supported if it provides an API to other modules on this OS, even if the majority of its functionality is not supported.
2012 sub check_os_support
2014 my $oss = $_[0]->{'os_support'};
2015 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
2016 # May provide usable API
2017 $oss .= " ".$_[0]->{'api_os_support'};
2019 if ($_[0]->{'nozone'} && &running_in_zone()) {
2020 # Not supported in a Solaris Zone
2023 if ($_[0]->{'novserver'} && &running_in_vserver()) {
2024 # Not supported in a Linux Vserver
2027 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
2028 # Not supported in an OpenVZ container
2031 return 1 if (!$oss || $oss eq '*');
2032 my $osver = $_[2] || $gconfig{'os_version'};
2033 my $ostype = $_[1] || $gconfig{'os_type'};
2036 my ($os, $ver, $codes);
2037 my ($neg) = ($oss =~ s/^!//); # starts with !
2038 $anyneg++ if ($neg);
2039 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2041 $os = $1; $ver = $2; $codes = $3; $oss = $4;
2043 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
2045 $os = $1; $ver = $2; $oss = $3;
2047 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2049 $os = $1; $codes = $2; $oss = $3;
2051 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
2053 $codes = $1; $oss = $2;
2055 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
2057 $os = $1; $oss = $2;
2060 next if ($os && !($os eq $ostype ||
2061 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
2062 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
2063 next if ($osver < $1 || $osver > $2);
2065 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
2066 next if ($osver < $1);
2068 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
2069 next if ($osver > $1);
2072 next if ($ver ne $osver);
2074 next if ($codes && !eval $codes);
2080 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2082 Downloads data from a HTTP url to a local file or string. The parameters are :
2084 =item host - The hostname part of the URL, such as www.google.com
2086 =item port - The HTTP port number, such as 80
2088 =item page - The filename part of the URL, like /index.html
2090 =item destfile - The local file to save the URL data to, like /tmp/index.html. This can also be a scalar reference, in which case the data will be appended to that scalar.
2092 =item error - If set to a scalar ref, the function will store any error message in this scalar and return 0 on failure, or 1 on success. If not set, it will simply call the error function if the download fails.
2094 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2096 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2098 =item user - If set, HTTP authentication is done with this username.
2100 =item pass - The HTTP password to use with the username above.
2102 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2104 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2106 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2108 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2113 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2114 $timeout, $osdn, $nocache, $headers) = @_;
2115 if ($gconfig{'debug_what_net'}) {
2116 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2117 ($user ? " user=$user pass=$pass" : "").
2118 (ref($dest) ? "" : " dest=$dest"));
2121 # Convert OSDN URL first
2122 my $prot = $ssl ? "https://" : "http://";
2123 my $portstr = $ssl && $port == 443 ||
2124 !$ssl && $port == 80 ? "" : ":$port";
2125 ($host, $port, $page, $ssl) = &parse_http_url(
2126 &convert_osdn_url($prot.$host.$portstr.$page));
2129 # Check if we already have cached the URL
2130 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2131 my $cfile = &check_in_http_cache($url);
2132 if ($cfile && !$nocache) {
2133 # Yes! Copy to dest file or variable
2134 &$cbfunc(6, $url) if ($cbfunc);
2136 &open_readfile(CACHEFILE, $cfile);
2138 $$dest = <CACHEFILE>;
2142 ©_source_dest($cfile, $dest);
2149 push(@headers, [ "Host", $host ]);
2150 push(@headers, [ "User-agent", "Webmin" ]);
2151 push(@headers, [ "Accept-language", "en" ]);
2153 my $auth = &encode_base64("$user:$pass");
2154 $auth =~ tr/\r\n//d;
2155 push(@headers, [ "Authorization", "Basic $auth" ]);
2157 foreach my $hname (keys %$headers) {
2158 push(@headers, [ $hname, $headers->{$hname} ]);
2161 # Actually download it
2162 $main::download_timed_out = undef;
2163 local $SIG{ALRM} = \&download_timeout;
2164 alarm($timeout || 60);
2165 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2167 $h = $main::download_timed_out if ($main::download_timed_out);
2169 if ($error) { $$error = $h; return; }
2170 else { &error($h); }
2172 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2173 $headers, $ssl, $nocache);
2174 if ((!$error || !$$error) && !$nocache) {
2175 &write_to_http_cache($url, $dest);
2179 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2181 Do a HTTP download, after the headers have been sent. For internal use only,
2182 typically called by http_download.
2185 sub complete_http_download
2187 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2193 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2194 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2196 if ($_[2]) { ${$_[2]} = $line; return; }
2197 else { &error("Download failed : $line"); }
2200 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2203 $line = &read_http_connection($_[0]);
2204 $line =~ tr/\r\n//d;
2205 $line =~ /^(\S+):\s+(.*)$/ || last;
2206 $header{lc($1)} = $2;
2207 push(@headers, [ lc($1), $2 ]);
2210 if ($main::download_timed_out) {
2211 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2212 else { &error($main::download_timed_out); }
2214 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2215 if ($rcode >= 300 && $rcode < 400) {
2216 # follow the redirect
2217 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2218 my ($host, $port, $page, $ssl);
2219 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2220 $ssl = $1 eq 'https' ? 1 : 0;
2225 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2226 $ssl = $1 eq 'https' ? 1 : 0;
2228 $port = $ssl ? 443 : 80;
2231 elsif ($header{'location'} =~ /^\// && $_[5]) {
2232 # Relative to same server
2236 $page = $header{'location'};
2238 elsif ($header{'location'}) {
2239 # Assume relative to same dir .. not handled
2240 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2241 else { &error("Invalid Location header $header{'location'}"); }
2244 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2245 else { &error("Missing Location header"); }
2248 ($page, $params) = split(/\?/, $page);
2250 $page .= "?".$params if (defined($params));
2251 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2252 undef, undef, undef, $_[4], $_[9], $_[7]);
2257 # Append to a variable
2258 while(defined($buf = &read_http_connection($_[0], 1024))) {
2260 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2266 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2267 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2268 else { &error("Failed to write to $_[1] : $!"); }
2270 binmode(PFILE); # For windows
2271 while(defined($buf = &read_http_connection($_[0], 1024))) {
2272 &print_tempfile(PFILE, $buf);
2273 $got += length($buf);
2274 &$cbfunc(3, $got) if ($cbfunc);
2276 &close_tempfile(PFILE);
2277 if ($header{'content-length'} &&
2278 $got != $header{'content-length'}) {
2279 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2280 else { &error("Download incomplete"); }
2283 &$cbfunc(4) if ($cbfunc);
2285 &close_http_connection($_[0]);
2289 =head2 http_post(host, port, page, content, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2291 Posts data to an HTTP url and downloads the response to a local file or string. The parameters are :
2293 =item host - The hostname part of the URL, such as www.google.com
2295 =item port - The HTTP port number, such as 80
2297 =item page - The filename part of the URL, like /index.html
2299 =item content - The data to post
2301 =item destfile - The local file to save the URL data to, like /tmp/index.html. This can also be a scalar reference, in which case the data will be appended to that scalar.
2303 =item error - If set to a scalar ref, the function will store any error message in this scalar and return 0 on failure, or 1 on success. If not set, it will simply call the error function if the download fails.
2305 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2307 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2309 =item user - If set, HTTP authentication is done with this username.
2311 =item pass - The HTTP password to use with the username above.
2313 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2315 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2317 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2319 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2324 my ($host, $port, $page, $content, $dest, $error, $cbfunc, $ssl, $user, $pass,
2325 $timeout, $osdn, $nocache, $headers) = @_;
2326 if ($gconfig{'debug_what_net'}) {
2327 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2328 ($user ? " user=$user pass=$pass" : "").
2329 (ref($dest) ? "" : " dest=$dest"));
2332 # Convert OSDN URL first
2333 my $prot = $ssl ? "https://" : "http://";
2334 my $portstr = $ssl && $port == 443 ||
2335 !$ssl && $port == 80 ? "" : ":$port";
2336 ($host, $port, $page, $ssl) = &parse_http_url(
2337 &convert_osdn_url($prot.$host.$portstr.$page));
2342 push(@headers, [ "Host", $host ]);
2343 push(@headers, [ "User-agent", "Webmin" ]);
2344 push(@headers, [ "Accept-language", "en" ]);
2345 push(@headers, [ "Content-type", "application/x-www-form-urlencoded" ]);
2346 push(@headers, [ "Content-length", length($content) ]);
2348 my $auth = &encode_base64("$user:$pass");
2349 $auth =~ tr/\r\n//d;
2350 push(@headers, [ "Authorization", "Basic $auth" ]);
2352 foreach my $hname (keys %$headers) {
2353 push(@headers, [ $hname, $headers->{$hname} ]);
2356 # Actually download it
2357 $main::download_timed_out = undef;
2358 local $SIG{ALRM} = \&download_timeout;
2359 alarm($timeout || 60);
2360 my $h = &make_http_connection($host, $port, $ssl, "POST", $page, \@headers);
2362 $h = $main::download_timed_out if ($main::download_timed_out);
2364 if ($error) { $$error = $h; return; }
2365 else { &error($h); }
2367 &write_http_connection($content."\r\n");
2368 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2369 $headers, $ssl, $nocache);
2370 if ((!$error || !$$error) && !$nocache) {
2371 &write_to_http_cache($url, $dest);
2375 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port], [no-cache])
2377 Download data from an FTP site to a local file. The parameters are :
2379 =item host - FTP server hostname
2381 =item file - File on the FTP server to download
2383 =item destfile - File on the Webmin system to download data to
2385 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2387 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2389 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2391 =item pass - Password for the username above.
2393 =item port - FTP server port number, which defaults to 21 if not set.
2395 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2400 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port, $nocache) = @_;
2402 if ($gconfig{'debug_what_net'}) {
2403 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2404 ($user ? " user=$user pass=$pass" : "").
2405 (ref($dest) ? "" : " dest=$dest"));
2409 if (&is_readonly_mode()) {
2410 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2412 else { &error("FTP connections not allowed in readonly mode"); }
2415 # Check if we already have cached the URL
2416 my $url = "ftp://".$host.$file;
2417 my $cfile = &check_in_http_cache($url);
2418 if ($cfile && !$nocache) {
2419 # Yes! Copy to dest file or variable
2420 &$cbfunc(6, $url) if ($cbfunc);
2422 &open_readfile(CACHEFILE, $cfile);
2424 $$dest = <CACHEFILE>;
2428 ©_source_dest($cfile, $dest);
2433 # Actually download it
2434 $main::download_timed_out = undef;
2435 local $SIG{ALRM} = \&download_timeout;
2438 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2439 # download through http-style proxy
2441 if (&open_socket($1, $2, "SOCK", \$error)) {
2443 if ($main::download_timed_out) {
2445 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2446 else { &error($main::download_timed_out); }
2448 my $esc = $_[1]; $esc =~ s/ /%20/g;
2449 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2450 my $portstr = $port == 21 ? "" : ":$port";
2451 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2452 print SOCK "User-agent: Webmin\r\n";
2453 if ($gconfig{'proxy_user'}) {
2454 my $auth = &encode_base64(
2455 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2456 $auth =~ tr/\r\n//d;
2457 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2460 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4],
2461 undef, undef, undef, undef, 0, $nocache);
2464 elsif (!$gconfig{'proxy_fallback'}) {
2466 if ($error) { $$error = $main::download_timed_out; return 0; }
2467 else { &error($main::download_timed_out); }
2472 # connect to host and login with real FTP protocol
2473 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2475 if ($main::download_timed_out) {
2476 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2477 else { &error($main::download_timed_out); }
2479 &ftp_command("", 2, $_[3]) || return 0;
2481 # Login as supplied user
2482 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2484 if (int($urv[1]/100) == 3) {
2485 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2489 # Login as anonymous
2490 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2492 if (int($urv[1]/100) == 3) {
2493 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2497 &$cbfunc(1, 0) if ($cbfunc);
2500 # get the file size and tell the callback
2501 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2502 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2503 defined($size) || return 0;
2505 &$cbfunc(2, int($size));
2509 my $pasv = &ftp_command("PASV", 2, $_[3]);
2510 defined($pasv) || return 0;
2511 $pasv =~ /\(([0-9,]+)\)/;
2512 @n = split(/,/ , $1);
2513 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2514 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2515 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2519 &open_tempfile(PFILE, ">$_[2]", 1);
2520 while(read(CON, $buf, 1024) > 0) {
2521 &print_tempfile(PFILE, $buf);
2522 $got += length($buf);
2523 &$cbfunc(3, $got) if ($cbfunc);
2525 &close_tempfile(PFILE);
2527 if ($got != $size) {
2528 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2529 else { &error("Download incomplete"); }
2531 &$cbfunc(4) if ($cbfunc);
2533 &ftp_command("", 2, $_[3]) || return 0;
2537 &ftp_command("QUIT", 2, $_[3]) || return 0;
2541 &write_to_http_cache($url, $dest);
2545 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2547 Upload data from a local file to an FTP site. The parameters are :
2549 =item host - FTP server hostname
2551 =item file - File on the FTP server to write to
2553 =item srcfile - File on the Webmin system to upload data from
2555 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2557 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2559 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2561 =item pass - Password for the username above.
2563 =item port - FTP server port number, which defaults to 21 if not set.
2570 if (&is_readonly_mode()) {
2571 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2573 else { &error("FTP connections not allowed in readonly mode"); }
2576 $main::download_timed_out = undef;
2577 local $SIG{ALRM} = \&download_timeout;
2580 # connect to host and login
2581 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2583 if ($main::download_timed_out) {
2584 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2585 else { &error($main::download_timed_out); }
2587 &ftp_command("", 2, $_[3]) || return 0;
2589 # Login as supplied user
2590 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2592 if (int($urv[1]/100) == 3) {
2593 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2597 # Login as anonymous
2598 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2600 if (int($urv[1]/100) == 3) {
2601 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2605 &$cbfunc(1, 0) if ($cbfunc);
2607 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2609 # get the file size and tell the callback
2610 my @st = stat($_[2]);
2612 &$cbfunc(2, $st[7]);
2616 my $pasv = &ftp_command("PASV", 2, $_[3]);
2617 defined($pasv) || return 0;
2618 $pasv =~ /\(([0-9,]+)\)/;
2619 @n = split(/,/ , $1);
2620 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2621 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2626 while(read(PFILE, $buf, 1024) > 0) {
2628 $got += length($buf);
2629 &$cbfunc(3, $got) if ($cbfunc);
2633 if ($got != $st[7]) {
2634 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2635 else { &error("Upload incomplete"); }
2637 &$cbfunc(4) if ($cbfunc);
2640 &ftp_command("", 2, $_[3]) || return 0;
2641 &ftp_command("QUIT", 2, $_[3]) || return 0;
2647 =head2 no_proxy(host)
2649 Checks if some host is on the no proxy list. For internal use by the
2650 http_download and ftp_download functions.
2655 my $ip = &to_ipaddress($_[0]);
2656 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2657 return 1 if ($_[0] =~ /\Q$n\E/ ||
2663 =head2 open_socket(host, port, handle, [&error])
2665 Open a TCP connection to some host and port, using a file handle. The
2668 =item host - Hostname or IP address to connect to.
2670 =item port - TCP port number.
2672 =item handle - A file handle name to use for the connection.
2674 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2679 my ($host, $port, $fh, $err) = @_;
2680 $fh = &callers_package($fh);
2682 if ($gconfig{'debug_what_net'}) {
2683 &webmin_debug_log('TCP', "host=$host port=$port");
2686 # Lookup IP address for the host. Try v4 first, and failing that v6
2688 my $proto = getprotobyname("tcp");
2689 if ($ip = &to_ipaddress($host)) {
2690 # Create IPv4 socket and connection
2691 if (!socket($fh, PF_INET(), SOCK_STREAM, $proto)) {
2692 my $msg = "Failed to create socket : $!";
2693 if ($err) { $$err = $msg; return 0; }
2694 else { &error($msg); }
2696 my $addr = inet_aton($ip);
2697 if ($gconfig{'bind_proxy'}) {
2698 # BIND to outgoing IP
2699 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2700 my $msg = "Failed to bind to source address : $!";
2701 if ($err) { $$err = $msg; return 0; }
2702 else { &error($msg); }
2705 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2706 my $msg = "Failed to connect to $host:$port : $!";
2707 if ($err) { $$err = $msg; return 0; }
2708 else { &error($msg); }
2711 elsif ($ip = &to_ip6address($host)) {
2712 # Create IPv6 socket and connection
2713 if (!&supports_ipv6()) {
2714 $msg = "IPv6 connections are not supported";
2715 if ($err) { $$err = $msg; return 0; }
2716 else { &error($msg); }
2718 if (!socket($fh, Socket6::PF_INET6(), SOCK_STREAM, $proto)) {
2719 my $msg = "Failed to create IPv6 socket : $!";
2720 if ($err) { $$err = $msg; return 0; }
2721 else { &error($msg); }
2723 my $addr = inet_pton(Socket6::AF_INET6(), $ip);
2724 if (!connect($fh, pack_sockaddr_in6($port, $addr))) {
2725 my $msg = "Failed to IPv6 connect to $host:$port : $!";
2726 if ($err) { $$err = $msg; return 0; }
2727 else { &error($msg); }
2732 my $msg = "Failed to lookup IP address for $host";
2733 if ($err) { $$err = $msg; return 0; }
2734 else { &error($msg); }
2738 my $old = select($fh);
2744 =head2 download_timeout
2746 Called when a download times out. For internal use only.
2749 sub download_timeout
2751 $main::download_timed_out = "Download timed out";
2754 =head2 ftp_command(command, expected, [&error], [filehandle])
2756 Send an FTP command, and die if the reply is not what was expected. Mainly
2757 for internal use by the ftp_download and ftp_upload functions.
2762 my ($cmd, $expect, $err, $fh) = @_;
2764 $fh = &callers_package($fh);
2767 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2769 print $fh "$cmd\r\n";
2772 if (!($line = <$fh>)) {
2774 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2775 else { &error("Failed to read reply to $what"); }
2777 $line =~ /^(...)(.)(.*)$/;
2780 foreach my $c (@$expect) {
2781 $found++ if (int($1/100) == $c);
2785 $found++ if (int($1/100) == $_[1]);
2789 if ($err) { $$err = "$what failed : $3"; return undef; }
2790 else { &error("$what failed : $3"); }
2795 # Need to skip extra stuff..
2797 if (!($line = <$fh>)) {
2799 if ($$err) { $$err = "Failed to read reply to $what";
2801 else { &error("Failed to read reply to $what"); }
2803 $line =~ /^(....)(.*)$/; $reply .= $2;
2804 if ($1 eq "$rcode ") { last; }
2808 return wantarray ? ($reply, $rcode) : $reply;
2811 =head2 to_ipaddress(hostname)
2813 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2814 it cannot be resolved.
2819 if (&check_ipaddress($_[0])) {
2820 return $_[0]; # Already in v4 format
2822 elsif (&check_ip6address($_[0])) {
2823 return undef; # A v6 address cannot be converted to v4
2826 my $hn = gethostbyname($_[0]);
2827 return undef if (!$hn);
2828 local @ip = unpack("CCCC", $hn);
2829 return join("." , @ip);
2833 =head2 to_ip6address(hostname)
2835 Converts a hostname to IPv6 address, or returns undef if it cannot be resolved.
2840 if (&check_ip6address($_[0])) {
2841 return $_[0]; # Already in v6 format
2843 elsif (&check_ipaddress($_[0])) {
2844 return undef; # A v4 address cannot be v6
2846 elsif (!&supports_ipv6()) {
2847 return undef; # Cannot lookup
2850 # Perform IPv6 DNS lookup
2852 (undef, undef, undef, $inaddr) =
2853 getaddrinfo($_[0], undef, Socket6::AF_INET6(), SOCK_STREAM);
2854 return undef if (!$inaddr);
2856 (undef, $addr) = unpack_sockaddr_in6($inaddr);
2857 return inet_ntop(Socket6::AF_INET6(), $addr);
2861 =head2 to_hostname(ipv4|ipv6-address)
2863 Reverse-resolves an IPv4 or 6 address to a hostname
2869 if (&check_ip6address($addr) && &supports_ipv6()) {
2870 return gethostbyaddr(inet_pton(Socket6::AF_INET6(), $addr),
2871 Socket6::AF_INET6());
2874 return gethostbyaddr(inet_aton($addr), AF_INET);
2878 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2880 Renders a 4-column table of icons. The useful parameters are :
2882 =item links - An array ref of link destination URLs for the icons.
2884 =item titles - An array ref of titles to appear under the icons.
2886 =item icons - An array ref of URLs for icon images.
2888 =item columns - Number of columns to layout the icons with. Defaults to 4.
2893 &load_theme_library();
2894 if (defined(&theme_icons_table)) {
2895 &theme_icons_table(@_);
2899 my $cols = $_[3] ? $_[3] : 4;
2900 my $per = int(100.0 / $cols);
2901 print "<table class='icons_table' width=100% cellpadding=5>\n";
2902 for(my $i=0; $i<@{$_[0]}; $i++) {
2903 if ($i%$cols == 0) { print "<tr>\n"; }
2904 print "<td width=$per% align=center valign=top>\n";
2905 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2906 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2907 $_[7]->[$i], $_[8]->[$i]);
2909 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2911 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2912 print "</tr>\n" if ($need_tr);
2916 =head2 replace_file_line(file, line, [newline]*)
2918 Replaces one line in some file with 0 or more new lines. The parameters are :
2920 =item file - Full path to some file, like /etc/hosts.
2922 =item line - Line number to replace, starting from 0.
2924 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2927 sub replace_file_line
2930 my $realfile = &translate_filename($_[0]);
2931 open(FILE, $realfile);
2934 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2935 else { splice(@lines, $_[1], 1); }
2936 &open_tempfile(FILE, ">$realfile");
2937 &print_tempfile(FILE, @lines);
2938 &close_tempfile(FILE);
2941 =head2 read_file_lines(file, [readonly])
2943 Returns a reference to an array containing the lines from some file. This
2944 array can be modified, and will be written out when flush_file_lines()
2945 is called. The parameters are :
2947 =item file - Full path to the file to read.
2949 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2953 $lref = read_file_lines("/etc/hosts");
2954 push(@$lref, "127.0.0.1 localhost");
2955 flush_file_lines("/etc/hosts");
2961 my ($package, $filename, $line) = caller;
2962 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2964 my $realfile = &translate_filename($_[0]);
2965 if (!$main::file_cache{$realfile}) {
2968 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2969 open(READFILE, $realfile);
2972 $eol = /\r\n$/ ? "\r\n" : "\n";
2978 $main::file_cache{$realfile} = \@lines;
2979 $main::file_cache_noflush{$realfile} = $_[1];
2980 $main::file_cache_eol{$realfile} = $eol || "\n";
2983 # Make read-write if currently readonly
2985 $main::file_cache_noflush{$realfile} = 0;
2988 return $main::file_cache{$realfile};
2991 =head2 flush_file_lines([file], [eol])
2993 Write out to a file previously read by read_file_lines to disk (except
2994 for those marked readonly). The parameters are :
2996 =item file - The file to flush out.
2998 =item eof - End-of-line character for each line. Defaults to \n.
3001 sub flush_file_lines
3005 local $trans = &translate_filename($_[0]);
3006 $main::file_cache{$trans} ||
3007 &error("flush_file_lines called on non-loaded file $trans");
3008 push(@files, $trans);
3011 @files = ( keys %main::file_cache );
3013 foreach my $f (@files) {
3014 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
3015 if (!$main::file_cache_noflush{$f}) {
3016 no warnings; # XXX Bareword file handles should go away
3017 &open_tempfile(FLUSHFILE, ">$f");
3018 foreach my $line (@{$main::file_cache{$f}}) {
3019 (print FLUSHFILE $line,$eol) ||
3020 &error(&text("efilewrite", $f, $!));
3022 &close_tempfile(FLUSHFILE);
3024 delete($main::file_cache{$f});
3025 delete($main::file_cache_noflush{$f});
3029 =head2 unflush_file_lines(file)
3031 Clear the internal cache of some given file, previously read by read_file_lines.
3034 sub unflush_file_lines
3036 my $realfile = &translate_filename($_[0]);
3037 delete($main::file_cache{$realfile});
3038 delete($main::file_cache_noflush{$realfile});
3041 =head2 unix_user_input(fieldname, user, [form])
3043 Returns HTML for an input to select a Unix user. By default this is a text
3044 box with a user popup button next to it.
3049 if (defined(&theme_unix_user_input)) {
3050 return &theme_unix_user_input(@_);
3052 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
3053 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
3056 =head2 unix_group_input(fieldname, user, [form])
3058 Returns HTML for an input to select a Unix group. By default this is a text
3059 box with a group popup button next to it.
3062 sub unix_group_input
3064 if (defined(&theme_unix_group_input)) {
3065 return &theme_unix_group_input(@_);
3067 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
3068 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
3071 =head2 hlink(text, page, [module], [width], [height])
3073 Returns HTML for a link that when clicked on pops up a window for a Webmin
3074 help page. The parameters are :
3076 =item text - Text for the link.
3078 =item page - Help page code, such as 'intro'.
3080 =item module - Module the help page is in. Defaults to the current module.
3082 =item width - Width of the help popup window. Defaults to 600 pixels.
3084 =item height - Height of the help popup window. Defaults to 400 pixels.
3086 The actual help pages are in each module's help sub-directory, in files with
3092 if (defined(&theme_hlink)) {
3093 return &theme_hlink(@_);
3095 my $mod = $_[2] ? $_[2] : &get_module_name();
3096 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
3097 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
3098 return "<a onClick='window.open(\"$gconfig{'webprefix'}/help.cgi/$mod/$_[1]\", \"help\", \"toolbar=no,menubar=no,scrollbars=yes,width=$width,height=$height,resizable=yes\"); return false' href=\"$gconfig{'webprefix'}/help.cgi/$mod/$_[1]\">$_[0]</a>";
3101 =head2 user_chooser_button(field, multiple, [form])
3103 Returns HTML for a javascript button for choosing a Unix user or users.
3104 The parameters are :
3106 =item field - Name of the HTML field to place the username into.
3108 =item multiple - Set to 1 if multiple users can be selected.
3110 =item form - Index of the form on the page.
3113 sub user_chooser_button
3115 return undef if (!&supports_users());
3116 return &theme_user_chooser_button(@_)
3117 if (defined(&theme_user_chooser_button));
3118 my $form = defined($_[2]) ? $_[2] : 0;
3119 my $w = $_[1] ? 500 : 300;
3121 if ($_[1] && $gconfig{'db_sizeusers'}) {
3122 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3124 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3125 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3127 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/user_chooser.cgi?multi=$_[1]&user=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
3130 =head2 group_chooser_button(field, multiple, [form])
3132 Returns HTML for a javascript button for choosing a Unix group or groups
3133 The parameters are :
3135 =item field - Name of the HTML field to place the group name into.
3137 =item multiple - Set to 1 if multiple groups can be selected.
3139 =item form - Index of the form on the page.
3142 sub group_chooser_button
3144 return undef if (!&supports_users());
3145 return &theme_group_chooser_button(@_)
3146 if (defined(&theme_group_chooser_button));
3147 my $form = defined($_[2]) ? $_[2] : 0;
3148 my $w = $_[1] ? 500 : 300;
3150 if ($_[1] && $gconfig{'db_sizeusers'}) {
3151 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3153 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3154 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3156 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/group_chooser.cgi?multi=$_[1]&group=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
3159 =head2 foreign_check(module, [api-only])
3161 Checks if some other module exists and is supported on this OS. The parameters
3164 =item module - Name of the module to check.
3166 =item api-only - Set to 1 if you just want to check if the module provides an API that others can call, instead of the full web UI.
3171 my ($mod, $api) = @_;
3173 my $mdir = &module_root_directory($mod);
3174 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
3175 return &check_os_support(\%minfo, undef, undef, $api);
3178 =head2 foreign_exists(module)
3180 Checks if some other module exists. The module parameter is the short module
3186 my $mdir = &module_root_directory($_[0]);
3187 return -r "$mdir/module.info";
3190 =head2 foreign_available(module)
3192 Returns 1 if some module is installed, and acessible to the current user. The
3193 module parameter is the module directory name.
3196 sub foreign_available
3198 return 0 if (!&foreign_check($_[0]) &&
3199 !$gconfig{'available_even_if_no_support'});
3200 my %foreign_module_info = &get_module_info($_[0]);
3202 # Check list of allowed modules
3204 &read_acl(\%acl, undef, [ $base_remote_user ]);
3205 return 0 if (!$acl{$base_remote_user,$_[0]} &&
3206 !$acl{$base_remote_user,'*'});
3208 # Check for usermod restrictions
3209 my @usermods = &list_usermods();
3210 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
3212 if (&get_product_name() eq "webmin") {
3213 # Check if the user has any RBAC privileges in this module
3214 if (&supports_rbac($_[0]) &&
3215 &use_rbac_module_acl(undef, $_[0])) {
3216 # RBAC is enabled for this user and module - check if he
3218 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
3219 return 0 if (!$rbacs);
3221 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
3222 # If denying access to modules not specifically allowed by
3223 # RBAC, then prevent access
3228 # Check readonly support
3229 if (&is_readonly_mode()) {
3230 return 0 if (!$foreign_module_info{'readonly'});
3233 # Check if theme vetos
3234 if (defined(&theme_foreign_available)) {
3235 return 0 if (!&theme_foreign_available($_[0]));
3238 # Check if licence module vetos
3239 if ($main::licence_module) {
3240 return 0 if (!&foreign_call($main::licence_module,
3241 "check_module_licence", $_[0]));
3247 =head2 foreign_require(module, [file], [package])
3249 Brings in functions from another module, and places them in the Perl namespace
3250 with the same name as the module. The parameters are :
3252 =item module - The source module's directory name, like sendmail.
3254 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
3256 =item package - Perl package to place the module's functions and global variables in.
3258 If the original module name contains dashes, they will be replaced with _ in
3264 my ($mod, $file, $pkg) = @_;
3265 $pkg ||= $mod || "global";
3266 $pkg =~ s/[^A-Za-z0-9]/_/g;
3269 push(@files, $file);
3273 my %minfo = &get_module_info($mod);
3274 if ($minfo{'library'}) {
3275 @files = split(/\s+/, $minfo{'library'});
3278 @files = ( $mod."-lib.pl" );
3281 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3282 return 1 if (!@files);
3283 foreach my $f (@files) {
3284 $main::done_foreign_require{$pkg,$f}++;
3287 my $mdir = &module_root_directory($mod);
3288 @INC = &unique($mdir, @INC);
3289 -d $mdir || &error("Module $mod does not exist");
3290 if (!&get_module_name() && $mod) {
3293 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3294 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3295 my $code = "package $pkg; ".
3296 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3297 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3298 foreach my $f (@files) {
3299 $code .= "do '$mdir/$f' || die \$@; ";
3302 if (defined($old_fmn)) {
3303 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3306 delete($ENV{'FOREIGN_MODULE_NAME'});
3308 if (defined($old_frd)) {
3309 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3312 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3315 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3319 =head2 foreign_call(module, function, [arg]*)
3321 Call a function in another module. The module parameter is the target module
3322 directory name, function is the perl sub to call, and the remaining parameters
3323 are the arguments. However, unless you need to call a function whose name
3324 is dynamic, it is better to use Perl's cross-module function call syntax
3325 like module::function(args).
3330 my $pkg = $_[0] || "global";
3331 $pkg =~ s/[^A-Za-z0-9]/_/g;
3332 my @args = @_[2 .. @_-1];
3333 $main::foreign_args = \@args;
3334 my @rv = eval <<EOF;
3336 &$_[1](\@{\$main::foreign_args});
3338 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3339 return wantarray ? @rv : $rv[0];
3342 =head2 foreign_config(module, [user-config])
3344 Get the configuration from another module, and return it as a hash. If the
3345 user-config parameter is set to 1, returns the Usermin user-level preferences
3346 for the current user instead.
3351 my ($mod, $uc) = @_;
3354 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3355 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3356 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3359 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3364 =head2 foreign_installed(module, mode)
3366 Checks if the server for some module is installed, and possibly also checks
3367 if the module has been configured by Webmin.
3368 For mode 1, returns 2 if the server is installed and configured for use by
3369 Webmin, 1 if installed but not configured, or 0 otherwise.
3370 For mode 0, returns 1 if installed, 0 if not.
3371 If the module does not provide an install_check.pl script, assumes that
3372 the server is installed.
3375 sub foreign_installed
3377 my ($mod, $configured) = @_;
3378 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3380 return $main::foreign_installed_cache{$mod,$configured};
3384 if (!&foreign_check($mod)) {
3389 my $mdir = &module_root_directory($mod);
3390 if (!-r "$mdir/install_check.pl") {
3391 # Not known, assume OK
3392 $rv = $configured ? 2 : 1;
3395 # Call function to check
3396 &foreign_require($mod, "install_check.pl");
3397 $rv = &foreign_call($mod, "is_installed", $configured);
3400 $main::foreign_installed_cache{$mod,$configured} = $rv;
3405 =head2 foreign_defined(module, function)
3407 Returns 1 if some function is defined in another module. In general, it is
3408 simpler to use the syntax &defined(module::function) instead.
3414 $pkg =~ s/[^A-Za-z0-9]/_/g;
3415 my $func = "${pkg}::$_[1]";
3416 return defined(&$func);
3419 =head2 get_system_hostname([short], [skip-file])
3421 Returns the hostname of this system. If the short parameter is set to 1,
3422 then the domain name is not prepended - otherwise, Webmin will attempt to get
3423 the fully qualified hostname, like foo.example.com.
3426 sub get_system_hostname
3429 my $skipfile = $_[1];
3430 if (!$main::get_system_hostname[$m]) {
3431 if ($gconfig{'os_type'} ne 'windows') {
3432 # Try some common Linux hostname files first
3435 # Never get from file
3437 elsif ($gconfig{'os_type'} eq 'redhat-linux') {
3439 &read_env_file("/etc/sysconfig/network", \%nc);
3440 if ($nc{'HOSTNAME'}) {
3441 $fromfile = $nc{'HOSTNAME'};
3444 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3445 my $hn = &read_file_contents("/etc/hostname");
3451 elsif ($gconfig{'os_type'} eq 'open-linux') {
3452 my $hn = &read_file_contents("/etc/HOSTNAME");
3458 elsif ($gconfig{'os_type'} eq 'solaris') {
3459 my $hn = &read_file_contents("/etc/nodename");
3466 # If we found a hostname in a file, use it
3467 if ($fromfile && ($m || $fromfile =~ /\./)) {
3469 $fromfile =~ s/\..*$//;
3471 $main::get_system_hostname[$m] = $fromfile;
3475 # Can use hostname command on Unix
3476 &execute_command("hostname", undef,
3477 \$main::get_system_hostname[$m], undef, 0, 1);
3478 chop($main::get_system_hostname[$m]);
3480 eval "use Sys::Hostname";
3482 $main::get_system_hostname[$m] = eval "hostname()";
3484 if ($@ || !$main::get_system_hostname[$m]) {
3485 $main::get_system_hostname[$m] = "UNKNOWN";
3488 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3489 $gconfig{'os_type'} =~ /linux$/ &&
3490 !$gconfig{'no_hostname_f'} && !$_[0]) {
3491 # Try with -f flag to get fully qualified name
3493 my $ex = &execute_command("hostname -f", undef, \$flag,
3496 if ($ex || $flag eq "") {
3497 # -f not supported! We have probably set the
3498 # hostname to just '-f'. Fix the problem
3501 &execute_command("hostname ".
3502 quotemeta($main::get_system_hostname[$m]),
3503 undef, undef, undef, 0, 1);
3507 $main::get_system_hostname[$m] = $flag;
3512 # On Windows, try computername environment variable
3513 return $ENV{'computername'} if ($ENV{'computername'});
3514 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3516 # Fall back to net name command
3517 my $out = `net name 2>&1`;
3518 if ($out =~ /\-+\r?\n(\S+)/) {
3519 $main::get_system_hostname[$m] = $1;
3522 $main::get_system_hostname[$m] = "windows";
3526 return $main::get_system_hostname[$m];
3529 =head2 get_webmin_version
3531 Returns the version of Webmin currently being run, such as 1.450.
3534 sub get_webmin_version
3536 if (!$get_webmin_version) {
3537 open(VERSION, "$root_directory/version") || return 0;
3538 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3541 return $get_webmin_version;
3544 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3546 Returns a hash containing access control options for the given user and module.
3547 By default the current username and module name are used. If the no-rbac flag
3548 is given, the permissions will not be updated based on the user's RBAC role
3549 (as seen on Solaris). If the no-default flag is given, default permissions for
3550 the module will not be included.
3555 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3556 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3557 my $mdir = &module_root_directory($m);
3560 # Read default ACL first, to be overridden by per-user settings
3561 &read_file_cached("$mdir/defaultacl", \%rv);
3563 # If this isn't a master admin user, apply the negative permissions
3564 # so that he doesn't un-expectedly gain access to new features
3566 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3567 if ($gaccess{'negative'}) {
3568 &read_file_cached("$mdir/negativeacl", \%rv);
3572 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3573 # RBAC overrides exist for this user in this module
3574 my $rbac = &get_rbac_module_acl(
3575 defined($_[0]) ? $_[0] : $remote_user, $m);
3576 foreach my $r (keys %$rbac) {
3577 $rv{$r} = $rbac->{$r};
3580 elsif ($gconfig{"risk_$u"} && $m) {
3581 # ACL is defined by user's risk level
3582 my $rf = $gconfig{"risk_$u"}.'.risk';
3583 &read_file_cached("$mdir/$rf", \%rv);
3585 my $sf = $gconfig{"skill_$u"}.'.skill';
3586 &read_file_cached("$mdir/$sf", \%rv);
3589 # Use normal Webmin ACL, if a user is set
3590 my $userdb = &get_userdb_string();
3592 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3593 # Look for this user in the user/group DB, if one is defined
3594 # and if the user might be in the DB
3595 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3596 ref($dbh) || &error(&text('euserdbacl', $dbh));
3597 if ($proto eq "mysql" || $proto eq "postgresql") {
3598 # Find the user in the SQL DB
3599 my $cmd = $dbh->prepare(
3600 "select id from webmin_user where name = ?");
3601 $cmd && $cmd->execute($u) ||
3602 &error(&text('euserdbacl', $dbh->errstr));
3603 my ($id) = $cmd->fetchrow();
3604 $foundindb = 1 if (defined($id));
3607 # Fetch ACLs with SQL
3609 my $cmd = $dbh->prepare(
3610 "select attr,value from webmin_user_acl ".
3611 "where id = ? and module = ?");
3612 $cmd && $cmd->execute($id, $m) ||
3613 &error(&text('euserdbacl', $dbh->errstr));
3614 while(my ($a, $v) = $cmd->fetchrow()) {
3620 elsif ($proto eq "ldap") {
3622 my $rv = $dbh->search(
3624 filter => '(&(cn='.$u.')(objectClass='.
3625 $args->{'userclass'}.'))',
3627 if (!$rv || $rv->code) {
3628 &error(&text('euserdbacl',
3629 $rv ? $rv->error : "Unknown error"));
3631 my ($user) = $rv->all_entries;
3633 # Find ACL sub-object for the module
3634 my $ldapm = $m || "global";
3636 my $rv = $dbh->search(
3637 base => $user->dn(),
3638 filter => '(cn='.$ldapm.')',
3640 if (!$rv || $rv->code) {
3641 &error(&text('euserdbacl',
3642 $rv ? $rv->error : "Unknown error"));
3644 my ($acl) = $rv->all_entries;
3646 foreach my $av ($acl->get_value(
3647 'webminAclEntry')) {
3648 my ($a, $v) = split(/=/, $av,2);
3654 &disconnect_userdb($userdb, $dbh);
3658 # Read from local files
3659 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3660 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3662 "$config_directory/$m/$remote_user.acl",\%rv);
3666 if ($tconfig{'preload_functions'}) {
3667 &load_theme_library();
3669 if (defined(&theme_get_module_acl)) {
3670 %rv = &theme_get_module_acl($u, $m, \%rv);
3675 =head2 get_group_module_acl(group, [module], [no-default])
3677 Returns the ACL for a Webmin group, in an optional module (which defaults to
3678 the current module).
3681 sub get_group_module_acl
3684 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3685 my $mdir = &module_root_directory($m);
3688 &read_file_cached("$mdir/defaultacl", \%rv);
3691 my $userdb = &get_userdb_string();
3694 # Look for this group in the user/group DB
3695 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3696 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3697 if ($proto eq "mysql" || $proto eq "postgresql") {
3698 # Find the group in the SQL DB
3699 my $cmd = $dbh->prepare(
3700 "select id from webmin_group where name = ?");
3701 $cmd && $cmd->execute($g) ||
3702 &error(&text('egroupdbacl', $dbh->errstr));
3703 my ($id) = $cmd->fetchrow();
3704 $foundindb = 1 if (defined($id));
3707 # Fetch ACLs with SQL
3709 my $cmd = $dbh->prepare(
3710 "select attr,value from webmin_group_acl ".
3711 "where id = ? and module = ?");
3712 $cmd && $cmd->execute($id, $m) ||
3713 &error(&text('egroupdbacl', $dbh->errstr));
3714 while(my ($a, $v) = $cmd->fetchrow()) {
3720 elsif ($proto eq "ldap") {
3721 # Find group in LDAP
3722 my $rv = $dbh->search(
3724 filter => '(&(cn='.$g.')(objectClass='.
3725 $args->{'groupclass'}.'))',
3727 if (!$rv || $rv->code) {
3728 &error(&text('egroupdbacl',
3729 $rv ? $rv->error : "Unknown error"));
3731 my ($group) = $rv->all_entries;
3733 # Find ACL sub-object for the module
3734 my $ldapm = $m || "global";
3736 my $rv = $dbh->search(
3737 base => $group->dn(),
3738 filter => '(cn='.$ldapm.')',
3740 if (!$rv || $rv->code) {
3741 &error(&text('egroupdbacl',
3742 $rv ? $rv->error : "Unknown error"));
3744 my ($acl) = $rv->all_entries;
3746 foreach my $av ($acl->get_value(
3747 'webminAclEntry')) {
3748 my ($a, $v) = split(/=/, $av, 2);
3754 &disconnect_userdb($userdb, $dbh);
3757 # Read from local files
3758 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3760 if (defined(&theme_get_module_acl)) {
3761 %rv = &theme_get_module_acl($g, $m, \%rv);
3766 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3768 Updates the acl hash for some user and module. The parameters are :
3770 =item acl - Hash reference for the new access control options, or undef to clear
3772 =item user - User to update, defaulting to the current user.
3774 =item module - Module to update, defaulting to the caller.
3776 =item never-update-group - Never update the user's group's ACL
3781 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3782 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3783 if (!$_[3] && &foreign_check("acl")) {
3784 # Check if this user is a member of a group, and if he gets the
3785 # module from a group. If so, update its ACL as well
3786 &foreign_require("acl", "acl-lib.pl");
3788 foreach my $g (&acl::list_groups()) {
3789 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3790 &indexof($m, @{$g->{'modules'}}) >= 0) {
3796 &save_group_module_acl($_[0], $group->{'name'}, $m);
3800 my $userdb = &get_userdb_string();
3802 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3803 # Look for this user in the user/group DB
3804 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3805 ref($dbh) || &error(&text('euserdbacl', $dbh));
3806 if ($proto eq "mysql" || $proto eq "postgresql") {
3807 # Find the user in the SQL DB
3808 my $cmd = $dbh->prepare(
3809 "select id from webmin_user where name = ?");
3810 $cmd && $cmd->execute($u) ||
3811 &error(&text('euserdbacl2', $dbh->errstr));
3812 my ($id) = $cmd->fetchrow();
3813 $foundindb = 1 if (defined($id));
3816 # Replace ACLs for user
3818 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3819 "where id = ? and module = ?");
3820 $cmd && $cmd->execute($id, $m) ||
3821 &error(&text('euserdbacl', $dbh->errstr));
3824 my $cmd = $dbh->prepare(
3825 "insert into webmin_user_acl ".
3826 "(id,module,attr,value) values (?,?,?,?)");
3827 $cmd || &error(&text('euserdbacl2',
3829 foreach my $a (keys %{$_[0]}) {
3830 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3831 &error(&text('euserdbacl2',
3838 elsif ($proto eq "ldap") {
3839 # Find the user in LDAP
3840 my $rv = $dbh->search(
3842 filter => '(&(cn='.$u.')(objectClass='.
3843 $args->{'userclass'}.'))',
3845 if (!$rv || $rv->code) {
3846 &error(&text('euserdbacl',
3847 $rv ? $rv->error : "Unknown error"));
3849 my ($user) = $rv->all_entries;
3852 # Find the ACL sub-object for the module
3854 my $ldapm = $m || "global";
3855 my $rv = $dbh->search(
3856 base => $user->dn(),
3857 filter => '(cn='.$ldapm.')',
3859 if (!$rv || $rv->code) {
3860 &error(&text('euserdbacl',
3861 $rv ? $rv->error : "Unknown error"));
3863 my ($acl) = $rv->all_entries;
3866 foreach my $a (keys %{$_[0]}) {
3867 push(@al, $a."=".$_[0]->{$a});
3871 $rv = $dbh->modify($acl->dn(),
3872 replace => { "webminAclEntry", \@al });
3876 my @attrs = ( "cn", $ldapm,
3877 "objectClass", "webminAcl",
3878 "webminAclEntry", \@al );
3879 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3882 if (!$rv || $rv->code) {
3883 &error(&text('euserdbacl2',
3884 $rv ? $rv->error : "Unknown error"));
3888 &disconnect_userdb($userdb, $dbh);
3892 # Save ACL to local file
3893 if (!-d "$config_directory/$m") {
3894 mkdir("$config_directory/$m", 0755);
3897 &write_file("$config_directory/$m/$u.acl", $_[0]);
3900 &unlink_file("$config_directory/$m/$u.acl");
3905 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3907 Updates the acl hash for some group and module. The parameters are :
3909 =item acl - Hash reference for the new access control options.
3911 =item group - Group name to update.
3913 =item module - Module to update, defaulting to the caller.
3915 =item never-update-group - Never update the parent group's ACL
3918 sub save_group_module_acl
3921 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3922 if (!$_[3] && &foreign_check("acl")) {
3923 # Check if this group is a member of a group, and if it gets the
3924 # module from a group. If so, update the parent ACL as well
3925 &foreign_require("acl", "acl-lib.pl");
3927 foreach my $pg (&acl::list_groups()) {
3928 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3929 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3935 &save_group_module_acl($_[0], $group->{'name'}, $m);
3939 my $userdb = &get_userdb_string();
3942 # Look for this group in the user/group DB
3943 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3944 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3945 if ($proto eq "mysql" || $proto eq "postgresql") {
3946 # Find the group in the SQL DB
3947 my $cmd = $dbh->prepare(
3948 "select id from webmin_group where name = ?");
3949 $cmd && $cmd->execute($g) ||
3950 &error(&text('egroupdbacl2', $dbh->errstr));
3951 my ($id) = $cmd->fetchrow();
3952 $foundindb = 1 if (defined($id));
3955 # Replace ACLs for group
3957 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3958 "where id = ? and module = ?");
3959 $cmd && $cmd->execute($id, $m) ||
3960 &error(&text('egroupdbacl', $dbh->errstr));
3963 my $cmd = $dbh->prepare(
3964 "insert into webmin_group_acl ".
3965 "(id,module,attr,value) values (?,?,?,?)");
3966 $cmd || &error(&text('egroupdbacl2',
3968 foreach my $a (keys %{$_[0]}) {
3969 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3970 &error(&text('egroupdbacl2',
3977 elsif ($proto eq "ldap") {
3978 # Find the group in LDAP
3979 my $rv = $dbh->search(
3981 filter => '(&(cn='.$g.')(objectClass='.
3982 $args->{'groupclass'}.'))',
3984 if (!$rv || $rv->code) {
3985 &error(&text('egroupdbacl',
3986 $rv ? $rv->error : "Unknown error"));
3988 my ($group) = $rv->all_entries;
3990 my $ldapm = $m || "global";
3992 # Find the ACL sub-object for the module
3994 my $rv = $dbh->search(
3995 base => $group->dn(),
3996 filter => '(cn='.$ldapm.')',
3998 if (!$rv || $rv->code) {
3999 &error(&text('egroupdbacl',
4000 $rv ? $rv->error : "Unknown error"));
4002 my ($acl) = $rv->all_entries;
4005 foreach my $a (keys %{$_[0]}) {
4006 push(@al, $a."=".$_[0]->{$a});
4010 $rv = $dbh->modify($acl->dn(),
4011 replace => { "webminAclEntry", \@al });
4015 my @attrs = ( "cn", $ldapm,
4016 "objectClass", "webminAcl",
4017 "webminAclEntry", \@al );
4018 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
4021 if (!$rv || $rv->code) {
4022 &error(&text('egroupdbacl2',
4023 $rv ? $rv->error : "Unknown error"));
4027 &disconnect_userdb($userdb, $dbh);
4031 # Save ACL to local file
4032 if (!-d "$config_directory/$m") {
4033 mkdir("$config_directory/$m", 0755);
4036 &write_file("$config_directory/$m/$g.gacl", $_[0]);
4039 &unlink_file("$config_directory/$m/$g.gacl");
4046 This function must be called by all Webmin CGI scripts, either directly or
4047 indirectly via a per-module lib.pl file. It performs a number of initialization
4048 and housekeeping tasks, such as working out the module name, checking that the
4049 current user has access to the module, and populating global variables. Some
4050 of the variables set include :
4052 =item $config_directory - Base Webmin config directory, typically /etc/webmin
4054 =item $var_directory - Base logs directory, typically /var/webmin
4056 =item %config - Per-module configuration.
4058 =item %gconfig - Global configuration.
4060 =item $scriptname - Base name of the current perl script.
4062 =item $module_name - The name of the current module.
4064 =item $module_config_directory - The config directory for this module.
4066 =item $module_config_file - The config file for this module.
4068 =item $module_root_directory - This module's code directory.
4070 =item $webmin_logfile - The detailed logfile for webmin.
4072 =item $remote_user - The actual username used to login to webmin.
4074 =item $base_remote_user - The username whose permissions are in effect.
4076 =item $current_theme - The theme currently in use.
4078 =item $root_directory - The first root directory of this webmin install.
4080 =item @root_directories - All root directories for this webmin install.
4085 # Record first process ID that called this, so we know when it exited to clean
4087 $main::initial_process_id ||= $$;
4089 # Configuration and spool directories
4090 if (!defined($ENV{'WEBMIN_CONFIG'})) {
4091 die "WEBMIN_CONFIG not set";
4093 $config_directory = $ENV{'WEBMIN_CONFIG'};
4094 if (!defined($ENV{'WEBMIN_VAR'})) {
4095 open(VARPATH, "$config_directory/var-path");
4096 chop($var_directory = <VARPATH>);
4100 $var_directory = $ENV{'WEBMIN_VAR'};
4102 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
4103 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
4105 if ($ENV{'SESSION_ID'}) {
4106 # Hide this variable from called programs, but keep it for internal use
4107 $main::session_id = $ENV{'SESSION_ID'};
4108 delete($ENV{'SESSION_ID'});
4110 if ($ENV{'REMOTE_PASS'}) {
4111 # Hide the password too
4112 $main::remote_pass = $ENV{'REMOTE_PASS'};
4113 delete($ENV{'REMOTE_PASS'});
4116 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
4117 # Looks like we are running setuid, but the real UID hasn't been set.
4118 # Do so now, so that executed programs don't get confused
4123 # Read the webmin global config file. This contains the OS type and version,
4124 # OS specific configuration and global options such as proxy servers
4125 $config_file = "$config_directory/config";
4127 &read_file_cached($config_file, \%gconfig);
4128 $gconfig{'webprefix'} = '' if (!exists($gconfig{'webprefix'}));
4129 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
4130 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
4132 # Work out of this is a web, command line or cron job
4133 if (!$main::webmin_script_type) {
4134 if ($ENV{'SCRIPT_NAME'}) {
4136 $main::webmin_script_type = 'web';
4139 # Cron jobs have no TTY
4140 if ($gconfig{'os_type'} eq 'windows' ||
4141 open(DEVTTY, ">/dev/tty")) {
4142 $main::webmin_script_type = 'cmd';
4146 $main::webmin_script_type = 'cron';
4151 # If this is a cron job, suppress STDERR warnings
4152 if ($main::webmin_script_type eq 'cron') {
4153 $SIG{__WARN__} = sub { };
4156 # If debugging is enabled, open the debug log
4157 if (($ENV{'WEBMIN_DEBUG'} || $gconfig{'debug_enabled'}) &&
4158 !$main::opened_debug_log++) {
4159 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
4160 if ($gconfig{'debug_size'}) {
4161 my @st = stat($dlog);
4162 if ($st[7] > $gconfig{'debug_size'}) {
4163 rename($dlog, $dlog.".0");
4166 open(main::DEBUGLOG, ">>$dlog");
4167 $main::opened_debug_log = 1;
4169 if ($gconfig{'debug_what_start'}) {
4170 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4171 $main::debug_log_start_time = time();
4172 &webmin_debug_log("START", "script=$script_name");
4173 $main::debug_log_start_module = $module_name;
4177 # Set PATH and LD_LIBRARY_PATH
4178 if ($gconfig{'path'}) {
4179 if ($gconfig{'syspath'}) {
4181 $ENV{'PATH'} = $gconfig{'path'};
4185 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
4188 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
4190 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
4191 if ($gconfig{'http_proxy'}) {
4192 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
4194 if ($gconfig{'ftp_proxy'}) {
4195 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
4197 if ($gconfig{'noproxy'}) {
4198 $ENV{'no_proxy'} = $gconfig{'noproxy'};
4201 # Find all root directories
4203 if (&get_miniserv_config(\%miniserv)) {
4204 @root_directories = ( $miniserv{'root'} );
4205 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
4206 push(@root_directories, $miniserv{"extraroot_$i"});
4210 # Work out which module we are in, and read the per-module config file
4211 $0 =~ s/\\/\//g; # Force consistent path on Windows
4212 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
4213 # In a foreign call - use the module name given
4214 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
4215 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
4216 @root_directories = ( $root_directory ) if (!@root_directories);
4218 elsif ($ENV{'SCRIPT_NAME'}) {
4219 my $sn = $ENV{'SCRIPT_NAME'};
4220 $sn =~ s/^$gconfig{'webprefix'}//
4221 if (!$gconfig{'webprefixnoredir'});
4222 if ($sn =~ /^\/([^\/]+)\//) {
4223 # Get module name from CGI path
4226 if ($ENV{'SERVER_ROOT'}) {
4227 $root_directory = $ENV{'SERVER_ROOT'};
4229 elsif ($ENV{'SCRIPT_FILENAME'}) {
4230 $root_directory = $ENV{'SCRIPT_FILENAME'};
4231 $root_directory =~ s/$sn$//;
4233 @root_directories = ( $root_directory ) if (!@root_directories);
4236 # Get root directory from miniserv.conf, and deduce module name from $0
4237 $root_directory = $root_directories[0];
4239 foreach my $r (@root_directories) {
4240 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
4241 # Under a module directory
4246 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
4252 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
4255 # Set the umask based on config
4256 if ($gconfig{'umask'} && !$main::umask_already++) {
4257 umask(oct($gconfig{'umask'}));
4260 # If this is a cron job or other background task, set the nice level
4261 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4263 if ($gconfig{'nice'}) {
4264 eval 'POSIX::nice($gconfig{\'nice\'});';
4267 # Set IO scheduling class and priority
4268 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4270 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4271 if ($gconfig{'sclass'} ne '');
4272 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4273 if ($gconfig{'sprio'} ne '');
4275 &execute_command("$cmd >/dev/null 2>&1");
4278 $main::nice_already++;
4281 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4282 $base_remote_user = $u;
4283 $remote_user = $ENV{'REMOTE_USER'};
4285 # Work out if user is definitely in the DB, and if so get his attrs
4286 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4287 %remote_user_attrs = ( );
4288 if ($remote_user_proto) {
4289 my $userdb = &get_userdb_string();
4290 my ($dbh, $proto, $prefix, $args) =
4291 $userdb ? &connect_userdb($userdb) : ( );
4293 if ($proto eq "mysql" || $proto eq "postgresql") {
4294 # Read attrs from SQL
4295 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
4296 if ($cmd && $cmd->execute($base_remote_user)) {
4297 while(my ($attr, $value) = $cmd->fetchrow()) {
4298 $remote_user_attrs{$attr} = $value;
4303 elsif ($proto eq "ldap") {
4304 # Read attrs from LDAP
4305 my $rv = $dbh->search(
4307 filter => '(&(cn='.$base_remote_user.')'.
4309 $args->{'userclass'}.'))',
4311 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4313 foreach $la ($u->get_value('webminAttr')) {
4314 my ($attr, $value) = split(/=/, $la, 2);
4315 $remote_user_attrs{$attr} = $value;
4319 &disconnect_userdb($userdb, $dbh);
4324 # Find and load the configuration file for this module
4325 my (@ruinfo, $rgroup);
4326 $module_config_directory = "$config_directory/$module_name";
4327 if (&get_product_name() eq "usermin" &&
4328 -r "$module_config_directory/config.$remote_user") {
4330 $module_config_file = "$module_config_directory/config.$remote_user";
4332 elsif (&get_product_name() eq "usermin" &&
4333 (@ruinfo = getpwnam($remote_user)) &&
4334 ($rgroup = getgrgid($ruinfo[3])) &&
4335 -r "$module_config_directory/config.\@$rgroup") {
4336 # Based on group name
4337 $module_config_file = "$module_config_directory/config.\@$rgroup";
4341 $module_config_file = "$module_config_directory/config";
4344 &read_file_cached($module_config_file, \%config);
4346 # Fix up windows-specific substitutions in values
4347 foreach my $k (keys %config) {
4348 if ($config{$k} =~ /\$\{systemroot\}/) {
4349 my $root = &get_windows_root();
4350 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4355 # Record the initial module
4356 $main::initial_module_name ||= $module_name;
4358 # Set some useful variables
4360 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4361 $gconfig{'mobile_theme'} :
4362 defined($remote_user_attrs{'theme'}) ?
4363 $remote_user_attrs{'theme'} :
4364 defined($gconfig{'theme_'.$remote_user}) ?
4365 $gconfig{'theme_'.$remote_user} :
4366 defined($gconfig{'theme_'.$base_remote_user}) ?
4367 $gconfig{'theme_'.$base_remote_user} :
4369 @current_themes = split(/\s+/, $current_themes);
4370 $current_theme = $current_themes[0];
4371 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4372 $theme_root_directory = $theme_root_directories[0];
4373 @theme_configs = ( );
4374 foreach my $troot (@theme_root_directories) {
4376 &read_file_cached("$troot/config", \%onetconfig);
4377 &read_file_cached("$troot/config", \%tconfig);
4378 push(@theme_configs, \%onetconfig);
4380 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4381 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4383 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4384 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4386 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4387 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4388 if ($tconfig{'preload_functions'}) {
4389 # Force load of theme functions right now, if requested
4390 &load_theme_library();
4392 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4393 # Load the theme's Webmin:: package classes
4394 do "$theme_root_directory/$tconfig{'oofunctions'}";
4399 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4400 : "$var_directory/webmin.log";
4402 # Load language strings into %text
4403 my @langs = &list_languages();
4405 if ($gconfig{'acceptlang'}) {
4406 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4407 $a =~ s/;.*//; # Remove ;q=0.5 or similar
4408 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4410 $accepted_lang = $al->{'lang'};
4415 $current_lang = $force_lang ? $force_lang :
4416 $accepted_lang ? $accepted_lang :
4417 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4418 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4419 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4420 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4421 foreach my $l (@langs) {
4422 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4424 @lang_order_list = &unique($default_lang,
4425 split(/:/, $current_lang_info->{'fallback'}),
4427 %text = &load_language($module_name);
4428 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4430 # Get the %module_info for this module
4432 my ($mi) = grep { $_->{'dir'} eq $module_name }
4433 &get_all_module_infos(2);
4434 %module_info = %$mi;
4435 $module_root_directory = &module_root_directory($module_name);
4438 if ($module_name && !$main::no_acl_check &&
4439 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4440 # Check if the HTTP user can access this module
4441 if (!&foreign_available($module_name)) {
4442 if (!&foreign_check($module_name)) {
4443 &error(&text('emodulecheck',
4444 "<i>$module_info{'desc'}</i>"));
4447 &error(&text('emodule', "<i>$u</i>",
4448 "<i>$module_info{'desc'}</i>"));
4451 $main::no_acl_check++;
4454 # Check the Referer: header for nasty redirects
4455 my @referers = split(/\s+/, $gconfig{'referers'});
4457 my $r = $ENV{'HTTP_REFERER'};
4458 if ($r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?\[([^\]]+)\]/ ||
4459 $r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4462 my $http_host = $ENV{'HTTP_HOST'};
4463 $http_host =~ s/:\d+$//;
4464 $http_host =~ s/^\[(\S+)\]$/$1/;
4465 my $unsafe_index = $unsafe_index_cgi ||
4466 &get_module_variable('$unsafe_index_cgi');
4468 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4469 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4471 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4472 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4473 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4474 ($referer_site && $referer_site ne $http_host &&
4475 &indexof($referer_site, @referers) < 0 ||
4476 !$referer_site && $gconfig{'referers_none'}) &&
4477 !$trust_unknown_referers &&
4478 !&get_module_variable('$trust_unknown_referers')) {
4479 # Looks like a link from elsewhere .. show an error
4480 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4482 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4483 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4484 if ($referer_site) {
4486 print &text('referer_warn',
4487 "<tt>".&html_escape($r)."</tt>", $url);
4489 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4490 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4493 # No referer info given
4494 print &text('referer_warn_unknown', $url),"<p>\n";
4495 print &text('referer_fix1u'),"<p>\n";
4496 print &text('referer_fix2u'),"<p>\n";
4500 &footer("/", $text{'index'});
4503 $main::no_referers_check++;
4504 $main::completed_referers_check++;
4506 # Call theme post-init
4507 if (defined(&theme_post_init_config)) {
4508 &theme_post_init_config(@_);
4511 # Record that we have done the calling library in this package
4512 my ($callpkg, $lib) = caller();
4514 $main::done_foreign_require{$callpkg,$lib} = 1;
4516 # If a licence checking is enabled, do it now
4517 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4518 &foreign_check($gconfig{'licence_module'}) &&
4519 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4520 my $oldpwd = &get_current_dir();
4521 $main::done_licence_module_check++;
4522 $main::licence_module = $gconfig{'licence_module'};
4523 &foreign_require($main::licence_module, "licence_check.pl");
4524 ($main::licence_status, $main::licence_message) =
4525 &foreign_call($main::licence_module, "check_licence");
4529 # Export global variables to caller
4530 if ($main::export_to_caller) {
4531 foreach my $v ('$config_file', '%gconfig', '$null_file',
4532 '$path_separator', '@root_directories',
4533 '$root_directory', '$module_name',
4534 '$base_remote_user', '$remote_user',
4535 '$remote_user_proto', '%remote_user_attrs',
4536 '$module_config_directory', '$module_config_file',
4537 '%config', '@current_themes', '$current_theme',
4538 '@theme_root_directories', '$theme_root_directory',
4539 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4540 '$webmin_logfile', '$current_lang',
4541 '$current_lang_info', '@lang_order_list', '%text',
4542 '%module_info', '$module_root_directory') {
4543 my ($vt, $vn) = split('', $v, 2);
4544 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4551 =head2 load_language([module], [directory])
4553 Returns a hashtable mapping text codes to strings in the appropriate language,
4554 based on the $current_lang global variable, which is in turn set based on
4555 the Webmin user's selection. The optional module parameter tells the function
4556 which module to load strings for, and defaults to the calling module. The
4557 optional directory parameter can be used to load strings from a directory
4560 In regular module development you will never need to call this function
4561 directly, as init_config calls it for you, and places the module's strings
4562 into the %text hash.
4568 my $root = $root_directory;
4569 my $ol = $gconfig{'overlang'};
4570 my ($dir) = ($_[1] || "lang");
4572 # Read global lang files
4573 foreach my $o (@lang_order_list) {
4574 my $ok = &read_file_cached_with_stat("$root/$dir/$o", \%text);
4575 return () if (!$ok && $o eq $default_lang);
4578 foreach my $o (@lang_order_list) {
4579 &read_file_cached("$root/$ol/$o", \%text);
4582 &read_file_cached("$config_directory/custom-lang", \%text);
4583 foreach my $o (@lang_order_list) {
4584 next if ($o eq "en");
4585 &read_file_cached("$config_directory/custom-lang.$o", \%text);
4587 my $norefs = $text{'__norefs'};
4590 # Read module's lang files
4591 delete($text{'__norefs'});
4592 my $mdir = &module_root_directory($_[0]);
4593 foreach my $o (@lang_order_list) {
4594 &read_file_cached_with_stat("$mdir/$dir/$o", \%text);
4597 foreach my $o (@lang_order_list) {
4598 &read_file_cached("$mdir/$ol/$o", \%text);
4601 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4602 foreach my $o (@lang_order_list) {
4603 next if ($o eq "en");
4604 &read_file_cached("$config_directory/$_[0]/custom-lang.$o",
4607 $norefs = $text{'__norefs'} if ($norefs);
4610 # Replace references to other strings
4612 foreach $k (keys %text) {
4613 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4617 if (defined(&theme_load_language)) {
4618 &theme_load_language(\%text, $_[0]);
4623 =head2 text_subs(string)
4625 Used internally by load_language to expand $code substitutions in language
4631 if (substr($_[0], 0, 8) eq "include:") {
4634 open(INCLUDE, substr($_[0], 8));
4642 my $t = $_[1]->{$_[0]};
4643 return defined($t) ? $t : '$'.$_[0];
4647 =head2 text(message, [substitute]+)
4649 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4650 the substitute parameters. This makes it easy to use strings with placeholders
4651 that get replaced with programmatically generated text. For example :
4653 print &text('index_hello', $remote_user),"<p>\n";
4658 my $t = &get_module_variable('%text', 1);
4659 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4660 for(my $i=1; $i<@_; $i++) {
4661 $rv =~ s/\$$i/$_[$i]/g;
4666 =head2 encode_base64(string)
4668 Encodes a string into base64 format, for use in MIME email or HTTP
4669 authorization headers.
4675 pos($_[0]) = 0; # ensure start at the beginning
4676 while ($_[0] =~ /(.{1,57})/gs) {
4677 $res .= substr(pack('u57', $1), 1)."\n";
4680 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4681 my $padding = (3 - length($_[0]) % 3) % 3;
4682 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4686 =head2 decode_base64(string)
4688 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4695 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4696 if (length($str) % 4) {
4699 $str =~ s/=+$//; # remove padding
4700 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4701 while ($str =~ /(.{1,60})/gs) {
4702 my $len = chr(32 + length($1)*3/4); # compute length byte
4703 $res .= unpack("u", $len . $1 ); # uudecode
4708 =head2 get_module_info(module, [noclone], [forcache])
4710 Returns a hash containg details of the given module. Some useful keys are :
4712 =item dir - The module directory, like sendmail.
4714 =item desc - Human-readable description, in the current users' language.
4716 =item version - Optional module version number.
4718 =item os_support - List of supported operating systems and versions.
4720 =item category - Category on Webmin's left menu, like net.
4725 return () if ($_[0] =~ /^\./);
4726 my (%rv, $clone, $o);
4727 my $mdir = &module_root_directory($_[0]);
4728 &read_file_cached("$mdir/module.info", \%rv) || return ();
4730 # A clone is a module that links to another directory under the root
4731 foreach my $r (@root_directories) {
4732 if (&is_under_directory($r, $mdir)) {
4738 foreach $o (@lang_order_list) {
4739 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4740 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4742 if ($clone && !$_[1] && $config_directory) {
4743 $rv{'clone'} = $rv{'desc'};
4744 &read_file("$config_directory/$_[0]/clone", \%rv);
4747 my %module_categories;
4748 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4749 my $pn = &get_product_name();
4750 if (defined($rv{'category_'.$pn})) {
4751 # Can override category for webmin/usermin
4752 $rv{'category'} = $rv{'category_'.$pn};
4754 $rv{'realcategory'} = $rv{'category'};
4755 $rv{'category'} = $module_categories{$_[0]}
4756 if (defined($module_categories{$_[0]}));
4758 # Apply description overrides
4759 $rv{'realdesc'} = $rv{'desc'};
4761 &read_file_cached("$config_directory/webmin.descs", \%descs);
4762 if ($descs{$_[0]}) {
4763 $rv{'desc'} = $descs{$_[0]};
4765 foreach my $o (@lang_order_list) {
4766 my $ov = $descs{$_[0]." ".$o} || $descs{$_[0]."_".$o};
4767 $rv{'desc'} = $ov if ($ov);
4771 # Apply per-user description overridde
4772 my %gaccess = &get_module_acl(undef, "");
4773 if ($gaccess{'desc_'.$_[0]}) {
4774 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4778 if ($rv{'longdesc'}) {
4779 # All standard modules have an index.cgi
4780 $rv{'index_link'} = 'index.cgi';
4783 # Call theme-specific override function
4784 if (defined(&theme_get_module_info)) {
4785 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4791 =head2 get_all_module_infos(cachemode)
4793 Returns a list contains the information on all modules in this webmin
4794 install, including clones. Uses caching to reduce the number of module.info
4795 files that need to be read. Each element of the array is a hash reference
4796 in the same format as returned by get_module_info. The cache mode flag can be :
4797 0 = read and write, 1 = don't read or write, 2 = read only
4800 sub get_all_module_infos
4804 # Is the cache out of date? (ie. have any of the root's changed?)
4805 my $cache_file = "$config_directory/module.infos.cache";
4807 if (&read_file_cached($cache_file, \%cache)) {
4808 foreach my $r (@root_directories) {
4810 if ($st[9] != $cache{'mtime_'.$r}) {
4820 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4821 # Can use existing module.info cache
4823 foreach my $k (keys %cache) {
4824 if ($k =~ /^(\S+) (\S+)$/) {
4825 $mods{$1}->{$2} = $cache{$k};
4828 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4831 # Need to rebuild cache
4833 foreach my $r (@root_directories) {
4835 foreach my $m (readdir(DIR)) {
4836 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4837 my %minfo = &get_module_info($m, 0, 1);
4838 next if (!%minfo || !$minfo{'dir'});
4840 foreach $k (keys %minfo) {
4841 $cache{"${m} ${k}"} = $minfo{$k};
4846 $cache{'mtime_'.$r} = $st[9];
4848 $cache{'lang'} = $current_lang;
4849 if (!$_[0] && $< == 0 && $> == 0) {
4851 # Don't fail if cache write fails
4852 local $main::error_must_die = 1;
4853 &write_file($cache_file, \%cache);
4858 # Override descriptions for modules for current user
4859 my %gaccess = &get_module_acl(undef, "");
4860 foreach my $m (@rv) {
4861 if ($gaccess{"desc_".$m->{'dir'}}) {
4862 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4866 # Apply installed flags
4868 &read_file_cached("$config_directory/installed.cache", \%installed);
4869 foreach my $m (@rv) {
4870 $m->{'installed'} = $installed{$m->{'dir'}};
4878 Returns an array of all installed themes, each of which is a hash ref
4879 corresponding to the theme.info file.
4885 opendir(DIR, $root_directory);
4886 foreach my $m (readdir(DIR)) {
4888 next if ($m =~ /^\./);
4889 next if (!&read_file_cached("$root_directory/$m/theme.info", \%tinfo));
4890 next if (!&check_os_support(\%tinfo));
4891 foreach my $o (@lang_order_list) {
4892 if ($tinfo{'desc_'.$o}) {
4893 $tinfo{'desc'} = $tinfo{'desc_'.$o};
4900 return sort { lc($a->{'desc'}) cmp lc($b->{'desc'}) } @rv;
4903 =head2 get_theme_info(theme)
4905 Returns a hash containing a theme's details, taken from it's theme.info file.
4906 Some useful keys are :
4908 =item dir - The theme directory, like blue-theme.
4910 =item desc - Human-readable description, in the current users' language.
4912 =item version - Optional module version number.
4914 =item os_support - List of supported operating systems and versions.
4919 return () if ($_[0] =~ /^\./);
4921 my $tdir = &module_root_directory($_[0]);
4922 &read_file("$tdir/theme.info", \%rv) || return ();
4923 foreach my $o (@lang_order_list) {
4924 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4930 =head2 list_languages
4932 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4933 Each is a hash reference with the following keys :
4935 =item lang - The short language code, like es for Spanish.
4937 =item desc - A human-readable description, in English.
4939 =item charset - An optional character set to use when displaying the language.
4941 =item titles - Set to 1 only if Webmin has title images for the language.
4943 =item fallback - The code for another language to use if a string does not exist in this one. For all languages, English is the ultimate fallback.
4948 if (!@main::list_languages_cache) {
4951 open(LANG, "$root_directory/lang_list.txt");
4953 if (/^(\S+)\s+(.*)/) {
4954 my $l = { 'desc' => $2 };
4955 foreach $o (split(/,/, $1)) {
4956 if ($o =~ /^([^=]+)=(.*)$/) {
4960 $l->{'index'} = scalar(@rv);
4961 push(@main::list_languages_cache, $l);
4965 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4966 @main::list_languages_cache;
4968 return @main::list_languages_cache;
4971 =head2 read_env_file(file, &hash, [include-commented])
4973 Similar to Webmin's read_file function, but handles files containing shell
4974 environment variables formatted like :
4979 The file parameter is the full path to the file to read, and hash a Perl hash
4980 ref to read names and values into.
4986 &open_readfile(FILE, $_[0]) || return 0;
4989 # Remove start of line comments
4993 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4994 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4995 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
5003 =head2 write_env_file(file, &hash, [export])
5005 Writes out a hash to a file in name='value' format, suitable for use in a shell
5006 script. The parameters are :
5008 =item file - Full path for a file to write to
5010 =item hash - Hash reference of names and values to write.
5012 =item export - If set to 1, preceed each variable setting with the word 'export'.
5017 my $exp = $_[2] ? "export " : "";
5018 &open_tempfile(FILE, ">$_[0]");
5019 foreach my $k (keys %{$_[1]}) {
5020 my $v = $_[1]->{$k};
5021 if ($v =~ /^\S+$/) {
5022 &print_tempfile(FILE, "$exp$k=$v\n");
5025 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
5028 &close_tempfile(FILE);
5031 =head2 lock_file(filename, [readonly], [forcefile])
5033 Lock a file for exclusive access. If the file is already locked, spin
5034 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
5035 to work OK. The parameters are :
5037 =item filename - File or directory to lock.
5039 =item readonly - If set, the lock is for reading the file only. More than one script can have a readonly lock, but only one can hold a write lock.
5041 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
5046 my $realfile = &translate_filename($_[0]);
5047 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
5048 my $no_lock = !&can_lock_file($realfile);
5049 my $lock_tries_count = 0;
5052 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
5057 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
5060 # Create the .lock file
5061 open(LOCKING, ">$realfile.lock") || return 0;
5062 my $lck = eval "flock(LOCKING, 2+4)";
5064 # Lock of lock file failed! Wait till later
5067 print LOCKING $$,"\n";
5068 eval "flock(LOCKING, 8)";
5071 $main::locked_file_list{$realfile} = int($_[1]);
5072 push(@main::temporary_files, "$realfile.lock");
5073 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
5074 !&get_module_variable('$no_log_file_changes') &&
5076 # Grab a copy of this file for later diffing
5078 $main::locked_file_data{$realfile} = undef;
5080 $main::locked_file_type{$realfile} = 1;
5081 $main::locked_file_data{$realfile} = '';
5083 elsif (!$_[2] && ($lnk = readlink($realfile))) {
5084 $main::locked_file_type{$realfile} = 2;
5085 $main::locked_file_data{$realfile} = $lnk;
5087 elsif (open(ORIGFILE, $realfile)) {
5088 $main::locked_file_type{$realfile} = 0;
5089 $main::locked_file_data{$realfile} = '';
5092 $main::locked_file_data{$realfile} .=$_;
5101 if ($lock_tries_count++ > 5*60) {
5102 # Give up after 5 minutes
5103 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
5109 =head2 unlock_file(filename)
5111 Release a lock on a file taken out by lock_file. If Webmin actions logging of
5112 file changes is enabled, then at unlock file a diff will be taken between the
5113 old and new contents, and stored under /var/webmin/diffs when webmin_log is
5114 called. This can then be viewed in the Webmin Actions Log module.
5119 my $realfile = &translate_filename($_[0]);
5120 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
5121 unlink("$realfile.lock") if (&can_lock_file($realfile));
5122 delete($main::locked_file_list{$realfile});
5123 if (exists($main::locked_file_data{$realfile})) {
5124 # Diff the new file with the old
5126 my $lnk = readlink($realfile);
5127 my $type = -d _ ? 1 : $lnk ? 2 : 0;
5128 my $oldtype = $main::locked_file_type{$realfile};
5129 my $new = !defined($main::locked_file_data{$realfile});
5130 if ($new && !-e _) {
5131 # file doesn't exist, and never did! do nothing ..
5133 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
5134 # is (or was) a directory ..
5135 if (-d _ && !defined($main::locked_file_data{$realfile})) {
5136 push(@main::locked_file_diff,
5137 { 'type' => 'mkdir', 'object' => $realfile });
5139 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
5140 push(@main::locked_file_diff,
5141 { 'type' => 'rmdir', 'object' => $realfile });
5144 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
5145 # is (or was) a symlink ..
5146 if ($lnk && !defined($main::locked_file_data{$realfile})) {
5147 push(@main::locked_file_diff,
5148 { 'type' => 'symlink', 'object' => $realfile,
5151 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
5152 push(@main::locked_file_diff,
5153 { 'type' => 'unsymlink', 'object' => $realfile,
5154 'data' => $main::locked_file_data{$realfile} });
5156 elsif ($lnk ne $main::locked_file_data{$realfile}) {
5157 push(@main::locked_file_diff,
5158 { 'type' => 'resymlink', 'object' => $realfile,
5163 # is a file, or has changed type?!
5164 my ($diff, $delete_file);
5165 my $type = "modify";
5167 open(NEWFILE, ">$realfile");
5172 if (!defined($main::locked_file_data{$realfile})) {
5175 open(ORIGFILE, ">$realfile.webminorig");
5176 print ORIGFILE $main::locked_file_data{$realfile};
5178 $diff = &backquote_command(
5179 "diff ".quotemeta("$realfile.webminorig")." ".
5180 quotemeta($realfile)." 2>/dev/null");
5181 push(@main::locked_file_diff,
5182 { 'type' => $type, 'object' => $realfile,
5183 'data' => $diff } ) if ($diff);
5184 unlink("$realfile.webminorig");
5185 unlink($realfile) if ($delete_file);
5188 if ($gconfig{'logfullfiles'}) {
5189 # Add file details to list of those to fully log
5190 $main::orig_file_data{$realfile} ||=
5191 $main::locked_file_data{$realfile};
5192 $main::orig_file_type{$realfile} ||=
5193 $main::locked_file_type{$realfile};
5196 delete($main::locked_file_data{$realfile});
5197 delete($main::locked_file_type{$realfile});
5201 =head2 test_lock(file)
5203 Returns 1 if some file is currently locked, 0 if not.
5208 my $realfile = &translate_filename($_[0]);
5209 return 0 if (!$_[0]);
5210 return 1 if (defined($main::locked_file_list{$realfile}));
5211 return 0 if (!&can_lock_file($realfile));
5213 if (open(LOCKING, "$realfile.lock")) {
5218 return $pid && kill(0, $pid);
5221 =head2 unlock_all_files
5223 Unlocks all files locked by the current script.
5226 sub unlock_all_files
5228 foreach $f (keys %main::locked_file_list) {
5233 =head2 can_lock_file(file)
5235 Returns 1 if some file should be locked, based on the settings in the
5236 Webmin Configuration module. For internal use by lock_file only.
5241 if (&is_readonly_mode()) {
5242 return 0; # never lock in read-only mode
5244 elsif ($gconfig{'lockmode'} == 0) {
5247 elsif ($gconfig{'lockmode'} == 1) {
5251 # Check if under any of the directories
5253 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
5254 if (&same_file($d, $_[0]) ||
5255 &is_under_directory($d, $_[0])) {
5259 return $gconfig{'lockmode'} == 2 ? $match : !$match;
5263 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
5265 Log some action taken by a user. This is typically called at the end of a
5266 script, once all file changes are complete and all commands run. The
5269 =item action - A short code for the action being performed, like 'create'.
5271 =item type - A code for the type of object the action is performed to, like 'user'.
5273 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
5275 =item params - A hash ref of additional information about the action.
5277 =item module - Name of the module in which the action was performed, which defaults to the current module.
5279 =item host - Remote host on which the action was performed. You should never need to set this (or the following two parameters), as they are used only for remote Webmin logging.
5281 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
5283 =item client-ip - IP address of the browser that performed the action.
5288 return if (!$gconfig{'log'} || &is_readonly_mode());
5289 my $m = $_[4] ? $_[4] : &get_module_name();
5291 if ($gconfig{'logclear'}) {
5292 # check if it is time to clear the log
5293 my @st = stat("$webmin_logfile.time");
5294 my $write_logtime = 0;
5296 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
5297 # clear logfile and all diff files
5298 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
5299 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
5300 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
5301 unlink($webmin_logfile);
5308 if ($write_logtime) {
5309 open(LOGTIME, ">$webmin_logfile.time");
5310 print LOGTIME time(),"\n";
5315 # If an action script directory is defined, call the appropriate scripts
5316 if ($gconfig{'action_script_dir'}) {
5317 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
5318 my ($basedir) = $gconfig{'action_script_dir'};
5320 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
5323 opendir(DIR, $dir) or die "Can't open $dir: $!";
5324 while (defined($file = readdir(DIR))) {
5325 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
5326 if (-x "$dir/$file") {
5327 # Call a script notifying it of the action
5329 $ENV{'ACTION_MODULE'} = &get_module_name();
5330 $ENV{'ACTION_ACTION'} = $_[0];
5331 $ENV{'ACTION_TYPE'} = $_[1];
5332 $ENV{'ACTION_OBJECT'} = $_[2];
5333 $ENV{'ACTION_SCRIPT'} = $script_name;
5334 foreach my $p (keys %param) {
5335 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5337 system("$dir/$file", @_,
5338 "<$null_file", ">$null_file", "2>&1");
5346 # should logging be done at all?
5347 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5348 split(/\s+/, $gconfig{'logusers'})) < 0);
5349 return if ($gconfig{'logmodules'} && &indexof($m,
5350 split(/\s+/, $gconfig{'logmodules'})) < 0);
5354 my @tm = localtime($now);
5355 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5356 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5357 my $idprefix = substr($now, 0, 5);
5358 $main::action_id_count++;
5359 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5360 $id, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5361 $tm[2], $tm[1], $tm[0],
5362 $remote_user || '-',
5363 $main::session_id || '-',
5364 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5365 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5366 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5368 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5369 my $v = $_[3]->{$k};
5375 elsif (ref($v) eq 'ARRAY') {
5379 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5380 $line .= " $k='$vv'";
5384 foreach $vv (split(/\0/, $v)) {
5386 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5387 $line .= " $k='$vv'";
5390 $param{$k} = join(" ", @pv);
5392 open(WEBMINLOG, ">>$webmin_logfile");
5393 print WEBMINLOG $line,"\n";
5395 if ($gconfig{'logperms'}) {
5396 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5399 chmod(0600, $webmin_logfile);
5402 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5403 # Find and record the changes made to any locked files, or commands run
5405 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5406 foreach my $d (@main::locked_file_diff) {
5407 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$idprefix", 0700);
5408 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id", 0700);
5409 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i");
5410 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5411 print DIFFLOG $d->{'data'};
5413 if ($d->{'input'}) {
5415 ">$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i.input");
5416 print DIFFLOG $d->{'input'};
5419 if ($gconfig{'logperms'}) {
5420 chmod(oct($gconfig{'logperms'}),
5421 "$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i",
5422 "$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i.input");
5426 @main::locked_file_diff = undef;
5429 if ($gconfig{'logfullfiles'}) {
5430 # Save the original contents of any modified files
5432 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5433 foreach my $f (keys %main::orig_file_data) {
5434 mkdir("$ENV{'WEBMIN_VAR'}/files/$idprefix", 0700);
5435 mkdir("$ENV{'WEBMIN_VAR'}/files/$idprefix/$id", 0700);
5436 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$idprefix/$id/$i");
5437 if (!defined($main::orig_file_type{$f})) {
5438 print ORIGLOG -1," ",$f,"\n";
5441 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5443 print ORIGLOG $main::orig_file_data{$f};
5445 if ($gconfig{'logperms'}) {
5446 chmod(oct($gconfig{'logperms'}),
5447 "$ENV{'WEBMIN_VAR'}/files/$idprefix/$id.$i");
5451 %main::orig_file_data = undef;
5452 %main::orig_file_type = undef;
5455 if ($miniserv::page_capture_out) {
5456 # Save the whole page output
5457 mkdir("$ENV{'WEBMIN_VAR'}/output", 0700);
5458 mkdir("$ENV{'WEBMIN_VAR'}/output/$idprefix", 0700);
5459 open(PAGEOUT, ">$ENV{'WEBMIN_VAR'}/output/$idprefix/$id");
5460 print PAGEOUT $miniserv::page_capture_out;
5462 if ($gconfig{'logperms'}) {
5463 chmod(oct($gconfig{'logperms'}),
5464 "$ENV{'WEBMIN_VAR'}/output/$idprefix/$id");
5466 $miniserv::page_capture_out = undef;
5470 if ($gconfig{'logsyslog'}) {
5471 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5472 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5473 setlogsock("inet");';
5475 # Syslog module is installed .. try to convert to a
5476 # human-readable form
5478 my $mod = &get_module_name();
5479 my $mdir = module_root_directory($mod);
5480 if (-r "$mdir/log_parser.pl") {
5481 &foreign_require($mod, "log_parser.pl");
5483 foreach my $k (keys %{$_[3]}) {
5484 my $v = $_[3]->{$k};
5485 if (ref($v) eq 'ARRAY') {
5486 $params{$k} = join("\0", @$v);
5492 $msg = &foreign_call($mod, "parse_webmin_log",
5493 $remote_user, $script_name,
5494 $_[0], $_[1], $_[2], \%params);
5495 $msg =~ s/<[^>]*>//g; # Remove tags
5497 elsif ($_[0] eq "_config_") {
5498 my %wtext = &load_language("webminlog");
5499 $msg = $wtext{'search_config'};
5501 $msg ||= "$_[0] $_[1] $_[2]";
5502 my %info = &get_module_info($m);
5503 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5508 =head2 additional_log(type, object, data, [input])
5510 Records additional log data for an upcoming call to webmin_log, such
5511 as a command that was run or SQL that was executed. Typically you will never
5512 need to call this function directory.
5517 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5518 push(@main::locked_file_diff,
5519 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5520 'input' => $_[3] } );
5524 =head2 webmin_debug_log(type, message)
5526 Write something to the Webmin debug log. For internal use only.
5529 sub webmin_debug_log
5531 my ($type, $msg) = @_;
5532 return 0 if (!$main::opened_debug_log);
5533 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5534 if ($gconfig{'debug_modules'}) {
5535 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5536 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5539 eval 'use Time::HiRes qw(gettimeofday); ($now, $ms) = gettimeofday';
5541 my @tm = localtime($now);
5543 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d.%6.6d] %s %s %s %s \"%s\"",
5544 $$, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5545 $tm[2], $tm[1], $tm[0], $ms,
5546 $remote_user || "-",
5547 $ENV{'REMOTE_HOST'} || "-",
5548 &get_module_name() || "-",
5551 seek(main::DEBUGLOG, 0, 2);
5552 print main::DEBUGLOG $line."\n";
5556 =head2 system_logged(command)
5558 Just calls the Perl system() function, but also logs the command run.
5563 if (&is_readonly_mode()) {
5564 print STDERR "Vetoing command $_[0]\n";
5567 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5568 my $cmd = join(" ", @realcmd);
5570 if ($cmd =~ s/(\s*&\s*)$//) {
5573 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5574 $cmd =~ s/^\((.*)\)\s*$/$1/;
5576 &additional_log('exec', undef, $cmd);
5577 return system(@realcmd);
5580 =head2 backquote_logged(command)
5582 Executes a command and returns the output (like `command`), but also logs it.
5585 sub backquote_logged
5587 if (&is_readonly_mode()) {
5589 print STDERR "Vetoing command $_[0]\n";
5592 my $realcmd = &translate_command($_[0]);
5595 if ($cmd =~ s/(\s*&\s*)$//) {
5598 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5599 $cmd =~ s/^\((.*)\)\s*$/$1/;
5601 &additional_log('exec', undef, $cmd);
5602 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5606 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5608 Runs some command, waiting at most the given number of seconds for it to
5609 complete, and returns the output. The maxlines parameter sets the number
5610 of lines of output to capture. The safe parameter should be set to 1 if the
5611 command is safe for read-only mode users to run.
5614 sub backquote_with_timeout
5616 my $realcmd = &translate_command($_[0]);
5617 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5618 if ($gconfig{'debug_what_cmd'});
5620 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5625 my $elapsed = time() - $start;
5626 last if ($elapsed > $_[1]);
5628 vec($rmask, fileno(OUT), 1) = 1;
5629 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5630 last if (!$sel || $sel < 0);
5632 last if (!defined($line));
5635 if ($_[3] && $linecount >= $_[3]) {
5640 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5644 return wantarray ? ($out, $timed_out) : $out;
5647 =head2 backquote_command(command, safe?)
5649 Executes a command and returns the output (like `command`), subject to
5650 command translation. The safe parameter should be set to 1 if the command
5651 is safe for read-only mode users to run.
5654 sub backquote_command
5656 if (&is_readonly_mode() && !$_[1]) {
5657 print STDERR "Vetoing command $_[0]\n";
5661 my $realcmd = &translate_command($_[0]);
5662 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5666 =head2 kill_logged(signal, pid, ...)
5668 Like Perl's built-in kill function, but also logs the fact that some process
5669 was killed. On Windows, falls back to calling process.exe to terminate a
5675 return scalar(@_)-1 if (&is_readonly_mode());
5676 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5677 if ($gconfig{'debug_what_procs'});
5678 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5679 if ($gconfig{'os_type'} eq 'windows') {
5680 # Emulate some kills with process.exe
5681 my $arg = $_[0] eq "KILL" ? "-k" :
5682 $_[0] eq "TERM" ? "-q" :
5683 $_[0] eq "STOP" ? "-s" :
5684 $_[0] eq "CONT" ? "-r" : undef;
5686 foreach my $p (@_[1..@_-1]) {
5688 $ok ||= kill($_[0], $p);
5691 &execute_command("process $arg $p");
5703 =head2 rename_logged(old, new)
5705 Re-names a file and logs the rename. If the old and new files are on different
5706 filesystems, calls mv or the Windows rename function to do the job.
5711 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5712 return &rename_file($_[0], $_[1]);
5715 =head2 rename_file(old, new)
5717 Renames a file or directory. If the old and new files are on different
5718 filesystems, calls mv or the Windows rename function to do the job.
5723 if (&is_readonly_mode()) {
5724 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5727 my $src = &translate_filename($_[0]);
5728 my $dst = &translate_filename($_[1]);
5729 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5730 if ($gconfig{'debug_what_ops'});
5731 my $ok = rename($src, $dst);
5732 if (!$ok && $! !~ /permission/i) {
5733 # Try the mv command, in case this is a cross-filesystem rename
5734 if ($gconfig{'os_type'} eq 'windows') {
5735 # Need to use rename
5736 my $out = &backquote_command("rename ".quotemeta($_[0]).
5737 " ".quotemeta($_[1])." 2>&1");
5739 $! = $out if (!$ok);
5743 my $out = &backquote_command("mv ".quotemeta($_[0]).
5744 " ".quotemeta($_[1])." 2>&1");
5746 $! = $out if (!$ok);
5752 =head2 symlink_logged(src, dest)
5754 Create a symlink, and logs it. Effectively does the same thing as the Perl
5761 my $rv = &symlink_file($_[0], $_[1]);
5762 &unlock_file($_[1]);
5766 =head2 symlink_file(src, dest)
5768 Creates a soft link, unless in read-only mode. Effectively does the same thing
5769 as the Perl symlink function.
5774 if (&is_readonly_mode()) {
5775 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5778 my $src = &translate_filename($_[0]);
5779 my $dst = &translate_filename($_[1]);
5780 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5781 if ($gconfig{'debug_what_ops'});
5782 return symlink($src, $dst);
5785 =head2 link_file(src, dest)
5787 Creates a hard link, unless in read-only mode. The existing new link file
5788 will be deleted if necessary. Effectively the same as Perl's link function.
5793 if (&is_readonly_mode()) {
5794 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5797 my $src = &translate_filename($_[0]);
5798 my $dst = &translate_filename($_[1]);
5799 &webmin_debug_log('LINK', "src=$src dst=$dst")
5800 if ($gconfig{'debug_what_ops'});
5801 unlink($dst); # make sure link works
5802 return link($src, $dst);
5805 =head2 make_dir(dir, perms, recursive)
5807 Creates a directory and sets permissions on it, unless in read-only mode.
5808 The perms parameter sets the octal permissions to apply, which unlike Perl's
5809 mkdir will really get set. The recursive flag can be set to 1 to have the
5810 function create parent directories too.
5815 my ($dir, $perms, $recur) = @_;
5816 if (&is_readonly_mode()) {
5817 print STDERR "Vetoing directory $dir\n";
5820 $dir = &translate_filename($dir);
5821 my $exists = -d $dir ? 1 : 0;
5822 return 1 if ($exists && $recur); # already exists
5823 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5824 my $rv = mkdir($dir, $perms);
5825 if (!$rv && $recur) {
5826 # Failed .. try mkdir -p
5827 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5828 my $ex = &execute_command("mkdir $param "."e_path($dir));
5834 chmod($perms, $dir);
5839 =head2 set_ownership_permissions(user, group, perms, file, ...)
5841 Sets the user, group owner and permissions on some files. The parameters are :
5843 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5845 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5847 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5849 =item file - One or more files or directories to modify.
5852 sub set_ownership_permissions
5854 my ($user, $group, $perms, @files) = @_;
5855 if (&is_readonly_mode()) {
5856 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5859 @files = map { &translate_filename($_) } @files;
5860 if ($gconfig{'debug_what_ops'}) {
5861 foreach my $f (@files) {
5862 &webmin_debug_log('PERMS',
5863 "file=$f user=$user group=$group perms=$perms");
5867 if (defined($user)) {
5868 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5870 if (defined($group)) {
5871 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5874 my @uinfo = getpwuid($uid);
5877 $rv = chown($uid, $gid, @files);
5879 if ($rv && defined($perms)) {
5880 $rv = chmod($perms, @files);
5885 =head2 unlink_logged(file, ...)
5887 Like Perl's unlink function, but locks the files beforehand and un-locks them
5888 after so that the deletion is logged by Webmin.
5894 foreach my $f (@_) {
5895 if (!&test_lock($f)) {
5900 my @rv = &unlink_file(@_);
5901 foreach my $f (@_) {
5906 return wantarray ? @rv : $rv[0];
5909 =head2 unlink_file(file, ...)
5911 Deletes some files or directories. Like Perl's unlink function, but also
5912 recursively deletes directories with the rm command if needed.
5917 return 1 if (&is_readonly_mode());
5920 foreach my $f (@_) {
5921 &unflush_file_lines($f);
5922 my $realf = &translate_filename($f);
5923 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5925 if (!rmdir($realf)) {
5927 if ($gconfig{'os_type'} eq 'windows') {
5928 # Call del and rmdir commands
5931 my $out = `del /q "$qm" 2>&1`;
5933 $out = `rmdir "$qm" 2>&1`;
5938 my $qm = quotemeta($realf);
5939 $out = `rm -rf $qm 2>&1`;
5948 if (!unlink($realf)) {
5954 return wantarray ? ($rv, $err) : $rv;
5957 =head2 copy_source_dest(source, dest)
5959 Copy some file or directory to a new location. Returns 1 on success, or 0
5960 on failure - also sets $! on failure. If the source is a directory, uses
5961 piped tar commands to copy a whole directory structure including permissions
5965 sub copy_source_dest
5967 return (1, undef) if (&is_readonly_mode());
5968 my ($src, $dst) = @_;
5971 &webmin_debug_log('COPY', "src=$src dst=$dst")
5972 if ($gconfig{'debug_what_ops'});
5973 if ($gconfig{'os_type'} eq 'windows') {
5974 # No tar or cp on windows, so need to use copy command
5978 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5981 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5989 # A directory .. need to copy with tar command
5990 my @st = stat($src);
5993 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5994 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
6001 # Can just copy with cp
6002 my $out = &backquote_logged("cp -p ".quotemeta($src).
6003 " ".quotemeta($dst)." 2>&1");
6009 return wantarray ? ($ok, $err) : $ok;
6012 =head2 remote_session_name(host|&server)
6014 Generates a session ID for some server. For this server, this will always
6015 be an empty string. For a server object it will include the hostname and
6016 port and PID. For a server name, it will include the hostname and PID. For
6020 sub remote_session_name
6022 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
6023 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
6024 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
6025 ref($_[0]) ? "" : "$_[0].$$";
6028 =head2 remote_foreign_require(server, module, file)
6030 Connects to rpc.cgi on a remote webmin server and have it open a session
6031 to a process that will actually do the require and run functions. This is the
6032 equivalent for foreign_require, but for a remote Webmin system. The server
6033 parameter can either be a hostname of a system registered in the Webmin
6034 Servers Index module, or a hash reference for a system from that module.
6037 sub remote_foreign_require
6039 my $call = { 'action' => 'require',
6042 my $sn = &remote_session_name($_[0]);
6043 if ($remote_session{$sn}) {
6044 $call->{'session'} = $remote_session{$sn};
6047 $call->{'newsession'} = 1;
6049 my $rv = &remote_rpc_call($_[0], $call);
6050 if ($rv->{'session'}) {
6051 $remote_session{$sn} = $rv->{'session'};
6052 $remote_session_server{$sn} = $_[0];
6056 =head2 remote_foreign_call(server, module, function, [arg]*)
6058 Call a function on a remote server. Must have been setup first with
6059 remote_foreign_require for the same server and module. Equivalent to
6060 foreign_call, but with the extra server parameter to specify the remote
6064 sub remote_foreign_call
6066 return undef if (&is_readonly_mode());
6067 my $sn = &remote_session_name($_[0]);
6068 return &remote_rpc_call($_[0], { 'action' => 'call',
6071 'session' => $remote_session{$sn},
6072 'args' => [ @_[3 .. $#_] ] } );
6075 =head2 remote_foreign_check(server, module, [api-only])
6077 Checks if some module is installed and supported on a remote server. Equivilant
6078 to foreign_check, but for the remote Webmin system specified by the server
6082 sub remote_foreign_check
6084 return &remote_rpc_call($_[0], { 'action' => 'check',
6089 =head2 remote_foreign_config(server, module)
6091 Gets the configuration for some module from a remote server, as a hash.
6092 Equivalent to foreign_config, but for a remote system.
6095 sub remote_foreign_config
6097 return &remote_rpc_call($_[0], { 'action' => 'config',
6098 'module' => $_[1] });
6101 =head2 remote_eval(server, module, code)
6103 Evaluates some perl code in the context of a module on a remote webmin server.
6104 The server parameter must be the hostname of a remote system, module must
6105 be a module directory name, and code a string of Perl code to run. This can
6106 only be called after remote_foreign_require for the same server and module.
6111 return undef if (&is_readonly_mode());
6112 my $sn = &remote_session_name($_[0]);
6113 return &remote_rpc_call($_[0], { 'action' => 'eval',
6116 'session' => $remote_session{$sn} });
6119 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
6121 Transfers some local file to another server via Webmin's RPC protocol, and
6122 returns the resulting remote filename. If the remotefile parameter is given,
6123 that is the destination filename which will be used. Otherwise a randomly
6124 selected temporary filename will be used, and returned by the function.
6129 return undef if (&is_readonly_mode());
6131 my $sn = &remote_session_name($_[0]);
6132 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6133 # Copy data over TCP connection
6134 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
6136 'name' => $_[3] } );
6138 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6139 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
6140 return &$main::remote_error_handler("Failed to transfer file : $error")
6143 while(read(FILE, $got, 1024) > 0) {
6147 shutdown(TWRITE, 1);
6149 if ($error && $error !~ /^OK/) {
6150 # Got back an error!
6151 return &$main::remote_error_handler("Failed to transfer file : $error");
6157 # Just pass file contents as parameters
6159 while(read(FILE, $got, 1024) > 0) {
6163 return &remote_rpc_call($_[0], { 'action' => 'write',
6166 'session' => $remote_session{$sn} });
6170 =head2 remote_read(server, localfile, remotefile)
6172 Transfers a file from a remote server to this system, using Webmin's RPC
6173 protocol. The server parameter must be the hostname of a system registered
6174 in the Webmin Servers Index module, localfile is the destination path on this
6175 system, and remotefile is the file to fetch from the remote server.
6180 my $sn = &remote_session_name($_[0]);
6181 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6182 # Copy data over TCP connection
6183 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
6184 'file' => $_[2] } );
6186 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
6189 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6190 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
6191 return &$main::remote_error_handler("Failed to transfer file : $error")
6194 open(FILE, ">$_[1]");
6195 while(read(TREAD, $got, 1024) > 0) {
6202 # Just get data as return value
6203 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
6205 'session' => $remote_session{$sn} });
6206 open(FILE, ">$_[1]");
6212 =head2 remote_finished
6214 Close all remote sessions. This happens automatically after a while
6215 anyway, but this function should be called to clean things up faster.
6220 foreach my $sn (keys %remote_session) {
6221 my $server = $remote_session_server{$sn};
6222 &remote_rpc_call($server, { 'action' => 'quit',
6223 'session' => $remote_session{$sn} } );
6224 delete($remote_session{$sn});
6225 delete($remote_session_server{$sn});
6227 foreach my $fh (keys %fast_fh_cache) {
6229 delete($fast_fh_cache{$fh});
6233 =head2 remote_error_setup(&function)
6235 Sets a function to be called instead of &error when a remote RPC operation
6236 fails. Useful if you want to have more control over your remote operations.
6239 sub remote_error_setup
6241 $main::remote_error_handler = $_[0] || \&error;
6244 =head2 remote_rpc_call(server, &structure)
6246 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
6247 and then reads back a reply structure. This is mainly for internal use only,
6248 and is called by the other remote_* functions.
6254 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
6256 # Server structure was given
6258 $serv->{'user'} || $serv->{'id'} == 0 ||
6259 return &$main::remote_error_handler(
6260 "No Webmin login set for server");
6263 # lookup the server in the webmin servers module if needed
6264 if (!%main::remote_servers_cache) {
6265 &foreign_require("servers", "servers-lib.pl");
6266 foreach $s (&foreign_call("servers", "list_servers")) {
6267 $main::remote_servers_cache{$s->{'host'}} = $s;
6268 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
6271 $serv = $main::remote_servers_cache{$_[0]};
6272 $serv || return &$main::remote_error_handler(
6273 "No Webmin Servers entry for $_[0]");
6274 $serv->{'user'} || return &$main::remote_error_handler(
6275 "No login set for server $_[0]");
6277 my $ip = $serv->{'ip'} || $serv->{'host'};
6279 # Work out the username and password
6281 if ($serv->{'sameuser'}) {
6282 $user = $remote_user;
6283 defined($main::remote_pass) || return &$main::remote_error_handler(
6284 "Password for this server is not available");
6285 $pass = $main::remote_pass;
6288 $user = $serv->{'user'};
6289 $pass = $serv->{'pass'};
6292 if ($serv->{'fast'} || !$sn) {
6293 # Make TCP connection call to fastrpc.cgi
6294 if (!$fast_fh_cache{$sn} && $sn) {
6295 # Need to open the connection
6296 my $con = &make_http_connection(
6297 $ip, $serv->{'port'}, $serv->{'ssl'},
6298 "POST", "/fastrpc.cgi");
6299 return &$main::remote_error_handler(
6300 "Failed to connect to $serv->{'host'} : $con")
6302 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6303 &write_http_connection($con, "User-agent: Webmin\r\n");
6304 my $auth = &encode_base64("$user:$pass");
6306 &write_http_connection($con, "Authorization: basic $auth\r\n");
6307 &write_http_connection($con, "Content-length: ",
6308 length($tostr),"\r\n");
6309 &write_http_connection($con, "\r\n");
6310 &write_http_connection($con, $tostr);
6312 # read back the response
6313 my $line = &read_http_connection($con);
6314 $line =~ tr/\r\n//d;
6315 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6316 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6318 $line =~ /^HTTP\/1\..\s+200\s+/ ||
6319 return &$main::remote_error_handler("HTTP error : $line");
6321 $line = &read_http_connection($con);
6322 $line =~ tr/\r\n//d;
6324 $line = &read_http_connection($con);
6325 if ($line =~ /^0\s+(.*)/) {
6326 return &$main::remote_error_handler("RPC error : $1");
6328 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
6329 $line =~ /^1\s+(\S+)\s+(\S+)/) {
6330 # Started ok .. connect and save SID
6331 &close_http_connection($con);
6332 my ($port, $sid, $version, $error) = ($1, $2, $3);
6333 &open_socket($ip, $port, $sid, \$error);
6334 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
6336 $fast_fh_cache{$sn} = $sid;
6337 $remote_server_version{$sn} = $version;
6340 while($stuff = &read_http_connection($con)) {
6343 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
6346 elsif (!$fast_fh_cache{$sn}) {
6347 # Open the connection by running fastrpc.cgi locally
6348 pipe(RPCOUTr, RPCOUTw);
6352 open(STDOUT, ">&RPCOUTw");
6356 $ENV{'REQUEST_METHOD'} = 'GET';
6357 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6358 $ENV{'SERVER_ROOT'} ||= $root_directory;
6360 if ($base_remote_user ne 'root' &&
6361 $base_remote_user ne 'admin') {
6362 # Need to fake up a login for the CGI!
6363 &read_acl(undef, \%acl, [ 'root' ]);
6364 $ENV{'BASE_REMOTE_USER'} =
6365 $ENV{'REMOTE_USER'} =
6366 $acl{'root'} ? 'root' : 'admin';
6368 delete($ENV{'FOREIGN_MODULE_NAME'});
6369 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6370 chdir($root_directory);
6371 if (!exec("$root_directory/fastrpc.cgi")) {
6372 print "exec failed : $!\n";
6379 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6383 if ($line =~ /^0\s+(.*)/) {
6384 return &$main::remote_error_handler("RPC error : $2");
6386 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6387 # Started ok .. connect and save SID
6389 my ($port, $sid, $error) = ($1, $2, undef);
6390 &open_socket("localhost", $port, $sid, \$error);
6391 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6392 $fast_fh_cache{$sn} = $sid;
6399 &error("Bad response from fastrpc.cgi : $line");
6402 # Got a connection .. send off the request
6403 my $fh = $fast_fh_cache{$sn};
6404 my $tostr = &serialise_variable($_[1]);
6405 print $fh length($tostr)," $fh\n";
6409 return &$main::remote_error_handler(
6410 "Error reading response length from fastrpc.cgi : $!")
6412 my $rlen = int($rstr);
6413 my ($fromstr, $got);
6414 while(length($fromstr) < $rlen) {
6415 return &$main::remote_error_handler(
6416 "Failed to read from fastrpc.cgi : $!")
6417 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6420 my $from = &unserialise_variable($fromstr);
6422 # No response at all
6423 return &$main::remote_error_handler("Remote Webmin error");
6425 elsif (ref($from) ne 'HASH') {
6427 return &$main::remote_error_handler(
6428 "Invalid remote Webmin response : $from");
6430 elsif (!$from->{'status'}) {
6432 $from->{'rv'} =~ s/\s+at\s+(\S+)\s+line\s+(\d+)(,\s+<\S+>\s+line\s+(\d+))?//;
6433 return &$main::remote_error_handler($from->{'rv'});
6435 if (defined($from->{'arv'})) {
6436 return @{$from->{'arv'}};
6439 return $from->{'rv'};
6443 # Call rpc.cgi on remote server
6444 my $tostr = &serialise_variable($_[1]);
6446 my $con = &make_http_connection($ip, $serv->{'port'},
6447 $serv->{'ssl'}, "POST", "/rpc.cgi");
6448 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6450 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6451 &write_http_connection($con, "User-agent: Webmin\r\n");
6452 my $auth = &encode_base64("$user:$pass");
6454 &write_http_connection($con, "Authorization: basic $auth\r\n");
6455 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6456 &write_http_connection($con, "\r\n");
6457 &write_http_connection($con, $tostr);
6459 # read back the response
6460 my $line = &read_http_connection($con);
6461 $line =~ tr/\r\n//d;
6462 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6463 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6465 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6467 $line = &read_http_connection($con);
6468 $line =~ tr/\r\n//d;
6471 while($line = &read_http_connection($con)) {
6475 my $from = &unserialise_variable($fromstr);
6476 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6477 if (defined($from->{'arv'})) {
6478 return @{$from->{'arv'}};
6481 return $from->{'rv'};
6486 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6488 Executes some function in parallel on multiple servers at once. Fills in
6489 the returns and errors arrays respectively. If the module and library
6490 parameters are given, that module is remotely required on the server first,
6491 to check if it is connectable. The parameters are :
6493 =item servers - A list of Webmin system hash references.
6495 =item parallel - Number of parallel operations to perform.
6497 =item function - Reference to function to call for each system.
6499 =item args - Additional parameters to the function.
6501 =item returns - Array ref to place return values into, in same order as servers.
6503 =item errors - Array ref to place error messages into.
6505 =item module - Optional module to require on the remote system first.
6507 =item library - Optional library to require in the module.
6510 sub remote_multi_callback
6512 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6513 &remote_error_setup(\&remote_multi_callback_error);
6515 # Call the functions
6517 foreach my $g (@$servs) {
6523 $remote_multi_callback_err = undef;
6525 # Require the remote lib
6526 &remote_foreign_require($g->{'host'}, $mod, $lib);
6527 if ($remote_multi_callback_err) {
6528 # Failed .. return error
6529 print $wh &serialise_variable(
6530 [ undef, $remote_multi_callback_err ]);
6536 my $a = ref($args) ? $args->[$p] : $args;
6537 my $rv = &$func($g, $a);
6540 print $wh &serialise_variable(
6541 [ $rv, $remote_multi_callback_err ]);
6549 # Read back the results
6551 foreach my $g (@$servs) {
6555 $errs->[$p] = "Failed to read response from $g->{'host'}";
6558 my $rv = &unserialise_variable($line);
6560 $rets->[$p] = $rv->[0];
6561 $errs->[$p] = $rv->[1];
6566 &remote_error_setup(undef);
6569 sub remote_multi_callback_error
6571 $remote_multi_callback_err = $_[0];
6574 =head2 serialise_variable(variable)
6576 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6577 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6578 called on each member to serialize the entire object.
6581 sub serialise_variable
6583 if (!defined($_[0])) {
6589 $rv = &urlize($_[0]);
6591 elsif ($r eq 'SCALAR') {
6592 $rv = &urlize(${$_[0]});
6594 elsif ($r eq 'ARRAY') {
6595 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6597 elsif ($r eq 'HASH') {
6598 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6599 &urlize(&serialise_variable($_[0]->{$_})) }
6602 elsif ($r eq 'REF') {
6603 $rv = &serialise_variable(${$_[0]});
6605 elsif ($r eq 'CODE') {
6610 # An object - treat as a hash
6611 $r = "OBJECT ".&urlize($r);
6612 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6613 &urlize(&serialise_variable($_[0]->{$_})) }
6616 return ($r ? $r : 'VAL').",".$rv;
6619 =head2 unserialise_variable(string)
6621 Converts a string created by serialise_variable() back into the original
6622 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6623 object, the same class is used on this system, if available.
6626 sub unserialise_variable
6628 my @v = split(/,/, $_[0]);
6630 if ($v[0] eq 'VAL') {
6631 @v = split(/,/, $_[0], -1);
6632 $rv = &un_urlize($v[1]);
6634 elsif ($v[0] eq 'SCALAR') {
6635 local $r = &un_urlize($v[1]);
6638 elsif ($v[0] eq 'ARRAY') {
6640 for(my $i=1; $i<@v; $i++) {
6641 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6644 elsif ($v[0] eq 'HASH') {
6646 for(my $i=1; $i<@v; $i+=2) {
6647 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6648 &unserialise_variable(&un_urlize($v[$i+1]));
6651 elsif ($v[0] eq 'REF') {
6652 local $r = &unserialise_variable($v[1]);
6655 elsif ($v[0] eq 'UNDEF') {
6658 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6659 # An object hash that we have to re-bless
6662 for(my $i=1; $i<@v; $i+=2) {
6663 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6664 &unserialise_variable(&un_urlize($v[$i+1]));
6672 =head2 other_groups(user)
6674 Returns a list of secondary groups a user is a member of, as a list of
6683 while(my @g = getgrent()) {
6684 my @m = split(/\s+/, $g[3]);
6685 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6687 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6691 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6693 Returns HTML for a button that pops up a data chooser window. The parameters
6696 =item dayfield - Name of the text field to place the day of the month into.
6698 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6700 =item yearfield - Name of the text field to place the year into.
6703 sub date_chooser_button
6705 return &theme_date_chooser_button(@_)
6706 if (defined(&theme_date_chooser_button));
6707 my ($w, $h) = (250, 225);
6708 if ($gconfig{'db_sizedate'}) {
6709 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6711 return "<input type=button onClick='window.dfield = form.$_[0]; window.mfield = form.$_[1]; window.yfield = form.$_[2]; window.open(\"$gconfig{'webprefix'}/date_chooser.cgi?day=\"+escape(dfield.value)+\"&month=\"+escape(mfield.selectedIndex)+\"&year=\"+yfield.value, \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,width=$w,height=$h\")' value=\"...\">\n";
6714 =head2 help_file(module, file)
6716 Returns the path to a module's help file of some name, typically under the
6717 help directory with a .html extension.
6722 my $mdir = &module_root_directory($_[0]);
6723 my $dir = "$mdir/help";
6724 foreach my $o (@lang_order_list) {
6725 my $lang = "$dir/$_[1].$o.html";
6726 return $lang if (-r $lang);
6728 return "$dir/$_[1].html";
6733 Seeds the random number generator, if not already done in this script. On Linux
6734 this makes use of the current time, process ID and a read from /dev/urandom.
6735 On other systems, only the current time and process ID are used.
6740 if (!$main::done_seed_random) {
6741 if (open(RANDOM, "/dev/urandom")) {
6743 read(RANDOM, $buf, 4);
6745 srand(time() ^ $$ ^ $buf);
6750 $main::done_seed_random = 1;
6754 =head2 disk_usage_kb(directory)
6756 Returns the number of kB used by some directory and all subdirs. Implemented
6757 by calling the C<du -k> command.
6762 my $dir = &translate_filename($_[0]);
6764 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6766 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6768 return $out =~ /^([0-9]+)/ ? $1 : "???";
6771 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6773 Returns the number of bytes taken up by all files in some directory and all
6774 sub-directories, by summing up their lengths. The disk_usage_kb is more
6775 reflective of reality, as the filesystem typically pads file sizes to 1k or
6779 sub recursive_disk_usage
6781 my $dir = &translate_filename($_[0]);
6788 my @st = stat($dir);
6794 my @files = readdir(DIR);
6796 foreach my $f (@files) {
6797 next if ($f eq "." || $f eq "..");
6798 next if ($skip && $f =~ /$skip/);
6799 next if ($only && $f !~ /$only/);
6800 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6806 =head2 help_search_link(term, [ section, ... ] )
6808 Returns HTML for a link to the man module for searching local and online
6809 docs for various search terms. The term parameter can either be a single
6810 word like 'bind', or a space-separated list of words. This function is typically
6811 used by modules that want to refer users to additional documentation in man
6812 pages or local system doc files.
6815 sub help_search_link
6817 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6818 my $for = &urlize(shift(@_));
6819 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6820 join("&", map { "section=$_" } @_)."&".
6821 "for=$for&exact=1&check=".&get_module_name()."'>".
6822 $text{'helpsearch'}."</a>\n";
6829 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6831 Opens a connection to some HTTP server, maybe through a proxy, and returns
6832 a handle object. The handle can then be used to send additional headers
6833 and read back a response. If anything goes wrong, returns an error string.
6834 The parameters are :
6836 =item host - Hostname or IP address of the webserver to connect to.
6838 =item port - HTTP port number to connect to.
6840 =item ssl - Set to 1 to connect in SSL mode.
6842 =item method - HTTP method, like GET or POST.
6844 =item page - Page to request on the webserver, like /foo/index.html
6846 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6849 sub make_http_connection
6851 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6854 foreach my $h (@$headers) {
6855 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6859 if (&is_readonly_mode()) {
6860 return "HTTP connections not allowed in readonly mode";
6862 my $rv = { 'fh' => time().$$ };
6865 eval "use Net::SSLeay";
6866 $@ && return $text{'link_essl'};
6867 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6868 eval "Net::SSLeay::load_error_strings()";
6869 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6870 return "Failed to create SSL context";
6871 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6872 return "Failed to create SSL connection";
6874 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6875 !&no_proxy($host)) {
6878 &open_socket($1, $2, $rv->{'fh'}, \$error);
6881 my $fh = $rv->{'fh'};
6882 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6883 if ($gconfig{'proxy_user'}) {
6884 my $auth = &encode_base64(
6885 "$gconfig{'proxy_user'}:".
6886 "$gconfig{'proxy_pass'}");
6887 $auth =~ tr/\r\n//d;
6888 print $fh "Proxy-Authorization: Basic $auth\r\n";
6892 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6893 return "Proxy error : $3" if ($2 != 200);
6896 return "Proxy error : $line";
6901 elsif (!$gconfig{'proxy_fallback'}) {
6902 # Connection to proxy failed - give up
6909 &open_socket($host, $port, $rv->{'fh'}, \$error);
6910 return $error if ($error);
6912 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6913 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6914 return "SSL connect() failed";
6915 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6916 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6919 # Plain HTTP request
6921 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6922 !&no_proxy($host)) {
6925 &open_socket($1, $2, $rv->{'fh'}, \$error);
6929 my $fh = $rv->{'fh'};
6930 my $rtxt = $method." ".
6931 "http://$host:$port$page HTTP/1.0\r\n";
6932 if ($gconfig{'proxy_user'}) {
6933 my $auth = &encode_base64(
6934 "$gconfig{'proxy_user'}:".
6935 "$gconfig{'proxy_pass'}");
6936 $auth =~ tr/\r\n//d;
6937 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6942 elsif (!$gconfig{'proxy_fallback'}) {
6947 # Connecting directly
6949 &open_socket($host, $port, $rv->{'fh'}, \$error);
6950 return $error if ($error);
6951 my $fh = $rv->{'fh'};
6952 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6959 =head2 read_http_connection(&handle, [bytes])
6961 Reads either one line or up to the specified number of bytes from the handle,
6962 originally supplied by make_http_connection.
6965 sub read_http_connection
6969 if ($h->{'ssl_con'}) {
6972 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6973 # need to read more..
6974 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6976 $rv = $h->{'buffer'};
6977 delete($h->{'buffer'});
6980 $h->{'buffer'} .= $more;
6982 $rv = substr($h->{'buffer'}, 0, $idx+1);
6983 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6986 if (length($h->{'buffer'})) {
6987 $rv = $h->{'buffer'};
6988 delete($h->{'buffer'});
6991 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6997 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
7000 my $fh = $h->{'fh'};
7004 $rv = undef if ($rv eq "");
7008 =head2 write_http_connection(&handle, [data+])
7010 Writes the given data to the given HTTP connection handle.
7013 sub write_http_connection
7016 my $fh = $h->{'fh'};
7018 if ($h->{'ssl_ctx'}) {
7019 foreach my $s (@_) {
7020 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
7021 $allok = 0 if (!$ok);
7025 my $ok = (print $fh @_);
7026 $allok = 0 if (!$ok);
7031 =head2 close_http_connection(&handle)
7033 Closes a connection to an HTTP server, identified by the given handle.
7036 sub close_http_connection
7042 =head2 clean_environment
7044 Deletes any environment variables inherited from miniserv so that they
7045 won't be passed to programs started by webmin. This is useful when calling
7046 programs that check for CGI-related environment variables and modify their
7047 behaviour, and to avoid passing sensitive variables to un-trusted programs.
7050 sub clean_environment
7052 %UNCLEAN_ENV = %ENV;
7053 foreach my $k (keys %ENV) {
7054 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
7058 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
7059 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
7060 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
7061 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
7062 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
7063 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
7064 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
7065 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
7071 =head2 reset_environment
7073 Puts the environment back how it was before clean_environment was callled.
7076 sub reset_environment
7079 foreach my $k (keys %UNCLEAN_ENV) {
7080 $ENV{$k} = $UNCLEAN_ENV{$k};
7082 undef(%UNCLEAN_ENV);
7086 =head2 clean_language
7088 Sets all language and locale-related environment variables to US english, to
7089 ensure that commands run output in the expected language. Can be reverted by
7095 %UNCLEAN_ENV = %ENV;
7097 $ENV{'LANGUAGE'} = '';
7098 $ENV{'LC_ALL'} = '';
7099 $ENV{'LOCALE'} = '';
7102 =head2 progress_callback
7104 Never called directly, but useful for passing to &http_download to print
7105 out progress of an HTTP request.
7108 sub progress_callback
7110 if (defined(&theme_progress_callback)) {
7111 # Call the theme override
7112 return &theme_progress_callback(@_);
7116 print $progress_callback_prefix;
7118 $progress_size = $_[1];
7119 $progress_step = int($_[1] / 10);
7120 print &text('progress_size2', $progress_callback_url,
7121 &nice_size($progress_size)),"<br>\n";
7124 $progress_size = undef;
7125 print &text('progress_nosize', $progress_callback_url),"<br>\n";
7127 $last_progress_time = $last_progress_size = undef;
7129 elsif ($_[0] == 3) {
7131 my $sp = $progress_callback_prefix.(" " x 5);
7132 if ($progress_size) {
7133 # And we have a size to compare against
7134 my $st = int(($_[1] * 10) / $progress_size);
7135 my $time_now = time();
7136 if ($st != $progress_step ||
7137 $time_now - $last_progress_time > 60) {
7138 # Show progress every 10% or 60 seconds
7139 print $sp,&text('progress_datan', &nice_size($_[1]),
7140 int($_[1]*100/$progress_size)),"<br>\n";
7141 $last_progress_time = $time_now;
7143 $progress_step = $st;
7146 # No total size .. so only show in 100k jumps
7147 if ($_[1] > $last_progress_size+100*1024) {
7148 print $sp,&text('progress_data2n',
7149 &nice_size($_[1])),"<br>\n";
7150 $last_progress_size = $_[1];
7154 elsif ($_[0] == 4) {
7155 # All done downloading
7156 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
7158 elsif ($_[0] == 5) {
7159 # Got new location after redirect
7160 $progress_callback_url = $_[1];
7162 elsif ($_[0] == 6) {
7164 $progress_callback_url = $_[1];
7165 print &text('progress_incache', $progress_callback_url),"<br>\n";
7169 =head2 switch_to_remote_user
7171 Changes the user and group of the current process to that of the unix user
7172 with the same name as the current webmin login, or fails if there is none.
7173 This should be called by Usermin module scripts that only need to run with
7174 limited permissions.
7177 sub switch_to_remote_user
7179 @remote_user_info = $remote_user ? getpwnam($remote_user) :
7181 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
7182 &create_missing_homedir(\@remote_user_info);
7184 &switch_to_unix_user(\@remote_user_info);
7185 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
7186 $ENV{'HOME'} = $remote_user_info[7];
7188 # Export global variables to caller
7189 if ($main::export_to_caller) {
7190 my ($callpkg) = caller();
7191 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
7195 =head2 switch_to_unix_user(&user-details)
7197 Switches the current process to the UID and group ID from the given list
7198 of user details, which must be in the format returned by getpwnam.
7201 sub switch_to_unix_user
7204 if (!defined($uinfo->[0])) {
7205 # No username given, so just use given GID
7206 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
7209 # Use all groups from user
7210 ($(, $)) = ( $uinfo->[3],
7211 "$uinfo->[3] ".join(" ", $uinfo->[3],
7212 &other_groups($uinfo->[0])) );
7215 POSIX::setuid($uinfo->[2]);
7217 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
7218 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
7222 =head2 eval_as_unix_user(username, &code)
7224 Runs some code fragment with the effective UID and GID switch to that
7225 of the given Unix user, so that file IO takes place with his permissions.
7229 sub eval_as_unix_user
7231 my ($user, $code) = @_;
7232 my @uinfo = getpwnam($user);
7233 if (!scalar(@uinfo)) {
7234 &error("eval_as_unix_user called with invalid user $user");
7236 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
7240 local $main::error_must_die = 1;
7247 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
7250 return wantarray ? @rv : $rv[0];
7253 =head2 create_user_config_dirs
7255 Creates per-user config directories and sets $user_config_directory and
7256 $user_module_config_directory to them. Also reads per-user module configs
7257 into %userconfig. This should be called by Usermin module scripts that need
7258 to store per-user preferences or other settings.
7261 sub create_user_config_dirs
7263 return if (!$gconfig{'userconfig'});
7264 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
7265 return if (!@uinfo || !$uinfo[7]);
7266 &create_missing_homedir(\@uinfo);
7267 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
7268 if (!-d $user_config_directory) {
7269 mkdir($user_config_directory, 0700) ||
7270 &error("Failed to create $user_config_directory : $!");
7271 if ($< == 0 && $uinfo[2]) {
7272 chown($uinfo[2], $uinfo[3], $user_config_directory);
7275 if (&get_module_name()) {
7276 $user_module_config_directory = $user_config_directory."/".
7278 if (!-d $user_module_config_directory) {
7279 mkdir($user_module_config_directory, 0700) ||
7280 &error("Failed to create $user_module_config_directory : $!");
7281 if ($< == 0 && $uinfo[2]) {
7282 chown($uinfo[2], $uinfo[3], $user_config_directory);
7286 &read_file_cached("$module_root_directory/defaultuconfig",
7288 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
7289 &read_file_cached("$user_module_config_directory/config",
7293 # Export global variables to caller
7294 if ($main::export_to_caller) {
7295 my ($callpkg) = caller();
7296 foreach my $v ('$user_config_directory',
7297 '$user_module_config_directory', '%userconfig') {
7298 my ($vt, $vn) = split('', $v, 2);
7299 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
7304 =head2 create_missing_homedir(&uinfo)
7306 If auto homedir creation is enabled, create one for this user if needed.
7307 For internal use only.
7310 sub create_missing_homedir
7313 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
7314 # Use has no home dir .. make one
7315 system("mkdir -p ".quotemeta($uinfo->[7]));
7316 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
7317 if ($gconfig{'create_homedir_perms'} ne '') {
7318 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
7323 =head2 filter_javascript(text)
7325 Disables all javascript <script>, onClick= and so on tags in the given HTML,
7326 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
7329 sub filter_javascript
7332 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
7333 $rv =~ s/(on(Abort|Blur|Change|Click|DblClick|DragDrop|Error|Focus|KeyDown|KeyPress|KeyUp|Load|MouseDown|MouseMove|MouseOut|MouseOver|MouseUp|Move|Reset|Resize|Select|Submit|Unload)=)/x$1/gi;
7334 $rv =~ s/(javascript:)/x$1/gi;
7335 $rv =~ s/(vbscript:)/x$1/gi;
7339 =head2 resolve_links(path)
7341 Given a path that may contain symbolic links, returns the real path.
7347 $path =~ s/\/+/\//g;
7348 $path =~ s/\/$// if ($path ne "/");
7349 my @p = split(/\/+/, $path);
7351 for(my $i=0; $i<@p; $i++) {
7352 my $sofar = "/".join("/", @p[0..$i]);
7353 my $lnk = readlink($sofar);
7354 if ($lnk eq $sofar) {
7355 # Link to itself! Cannot do anything more really ..
7358 elsif ($lnk =~ /^\//) {
7359 # Link is absolute..
7360 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
7364 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
7370 =head2 simplify_path(path, bogus)
7372 Given a path, maybe containing elements ".." and "." , convert it to a
7373 clean, absolute form. Returns undef if this is not possible.
7381 my @bits = split(/\/+/, $dir);
7384 foreach my $b (@bits) {
7388 elsif ($b eq "..") {
7390 if (scalar(@fixedbits) == 0) {
7391 # Cannot! Already at root!
7398 push(@fixedbits, $b);
7401 return "/".join('/', @fixedbits);
7404 =head2 same_file(file1, file2)
7406 Returns 1 if two files are actually the same
7411 return 1 if ($_[0] eq $_[1]);
7412 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7413 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7414 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7415 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7416 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7417 return 0 if (!@stat1 || !@stat2);
7418 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7421 =head2 flush_webmin_caches
7423 Clears all in-memory and on-disk caches used by Webmin.
7426 sub flush_webmin_caches
7428 undef(%main::read_file_cache);
7429 undef(%main::acl_hash_cache);
7430 undef(%main::acl_array_cache);
7431 undef(%main::has_command_cache);
7432 undef(@main::list_languages_cache);
7433 undef($main::got_list_usermods_cache);
7434 undef(@main::list_usermods_cache);
7435 undef(%main::foreign_installed_cache);
7436 unlink("$config_directory/module.infos.cache");
7437 &get_all_module_infos();
7440 =head2 list_usermods
7442 Returns a list of additional module restrictions. For internal use in
7448 if (!$main::got_list_usermods_cache) {
7449 @main::list_usermods_cache = ( );
7451 open(USERMODS, "$config_directory/usermin.mods");
7453 if (/^([^:]+):(\+|-|):(.*)/) {
7454 push(@main::list_usermods_cache,
7455 [ $1, $2, [ split(/\s+/, $3) ] ]);
7459 $main::got_list_usermods_cache = 1;
7461 return @main::list_usermods_cache;
7464 =head2 available_usermods(&allmods, &usermods)
7466 Returns a list of modules that are available to the given user, based
7467 on usermod additional/subtractions. For internal use by Usermin only.
7470 sub available_usermods
7472 return @{$_[0]} if (!@{$_[1]});
7474 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7475 my @uinfo = @remote_user_info;
7476 @uinfo = getpwnam($remote_user) if (!@uinfo);
7477 foreach my $u (@{$_[1]}) {
7479 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7482 elsif ($u->[0] =~ /^\@(.*)$/) {
7483 # Check for group membership
7484 my @ginfo = getgrnam($1);
7485 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7486 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7488 elsif ($u->[0] =~ /^\//) {
7489 # Check users and groups in file
7491 open(USERFILE, $u->[0]);
7494 if ($_ eq $remote_user) {
7497 elsif (/^\@(.*)$/) {
7498 my @ginfo = getgrnam($1);
7500 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7501 &indexof($remote_user,
7502 split(/\s+/, $ginfo[3])) >= 0));
7509 if ($u->[1] eq "+") {
7510 map { $mods{$_}++ } @{$u->[2]};
7512 elsif ($u->[1] eq "-") {
7513 map { delete($mods{$_}) } @{$u->[2]};
7517 map { $mods{$_}++ } @{$u->[2]};
7521 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7524 =head2 get_available_module_infos(nocache)
7526 Returns a list of modules available to the current user, based on
7527 operating system support, access control and usermod restrictions. Useful
7528 in themes that need to display a list of modules the user can use.
7529 Each element of the returned array is a hash reference in the same format as
7530 returned by get_module_info.
7533 sub get_available_module_infos
7536 &read_acl(\%acl, \%uacl, [ $base_remote_user ]);
7537 my $risk = $gconfig{'risk_'.$base_remote_user};
7539 foreach my $minfo (&get_all_module_infos($_[0])) {
7540 next if (!&check_os_support($minfo));
7542 # Check module risk level
7543 next if ($risk ne 'high' && $minfo->{'risk'} &&
7544 $minfo->{'risk'} !~ /$risk/);
7548 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7549 !$acl{$base_remote_user,"*"});
7551 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7555 # Check usermod restrictions
7556 my @usermods = &list_usermods();
7557 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7558 &available_usermods(\@rv, \@usermods);
7560 # Check RBAC restrictions
7562 foreach my $m (@rv) {
7563 if (&supports_rbac($m->{'dir'}) &&
7564 &use_rbac_module_acl(undef, $m->{'dir'})) {
7565 local $rbacs = &get_rbac_module_acl($remote_user,
7573 # Module or system doesn't support RBAC
7574 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7580 if (defined(&theme_foreign_available)) {
7581 foreach my $m (@rbacrv) {
7582 if (&theme_foreign_available($m->{'dir'})) {
7591 # Check licence module vetos
7593 if ($main::licence_module) {
7594 foreach my $m (@themerv) {
7595 if (&foreign_call($main::licence_module,
7596 "check_module_licence", $m->{'dir'})) {
7608 =head2 get_visible_module_infos(nocache)
7610 Like get_available_module_infos, but excludes hidden modules from the list.
7611 Each element of the returned array is a hash reference in the same format as
7612 returned by get_module_info.
7615 sub get_visible_module_infos
7618 my $pn = &get_product_name();
7619 return grep { !$_->{'hidden'} &&
7620 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7623 =head2 get_visible_modules_categories(nocache)
7625 Returns a list of Webmin module categories, each of which is a hash ref
7626 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7627 of modules in the category, in the format returned by get_module_info.
7628 Un-used modules are automatically assigned to the 'unused' category, and
7629 those with no category are put into 'others'.
7632 sub get_visible_modules_categories
7635 my @mods = &get_visible_module_infos($nocache);
7637 if (&get_product_name() eq 'webmin') {
7638 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7639 @mods = grep { $_->{'installed'} ne '0' } @mods;
7641 my %cats = &list_categories(\@mods);
7643 foreach my $c (keys %cats) {
7644 my $cat = { 'code' => $c || 'other',
7645 'desc' => $cats{$c} };
7646 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7649 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7650 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7652 # Add un-installed modules in magic category
7653 my $cat = { 'code' => 'unused',
7654 'desc' => $text{'main_unused'},
7656 'modules' => \@unmods };
7662 =head2 is_under_directory(directory, file)
7664 Returns 1 if the given file is under the specified directory, 0 if not.
7665 Symlinks are taken into account in the file to find it's 'real' location.
7668 sub is_under_directory
7670 my ($dir, $file) = @_;
7671 return 1 if ($dir eq "/");
7672 return 0 if ($file =~ /\.\./);
7673 my $ld = &resolve_links($dir);
7675 return &is_under_directory($ld, $file);
7677 my $lp = &resolve_links($file);
7679 return &is_under_directory($dir, $lp);
7681 return 0 if (length($file) < length($dir));
7682 return 1 if ($dir eq $file);
7684 return substr($file, 0, length($dir)) eq $dir;
7687 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7689 Given an absolute URL, returns the host, port, page and ssl flag components.
7690 If a username and password are given before the hostname, return those too.
7691 Relative URLs can also be parsed, if the base information is provided.
7696 if ($_[0] =~ /^(http|https):\/\/([^\@]+\@)?\[([^\]]+)\](:(\d+))?(\/\S*)?$/ ||
7697 $_[0] =~ /^(http|https):\/\/([^\@]+\@)?([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7699 my $ssl = $1 eq 'https';
7700 my @rv = ($3, $4 ? $5 : $ssl ? 443 : 80, $6 || "/", $ssl);
7701 if ($2 =~ /^([^:]+):(\S+)\@/) {
7710 elsif ($_[0] =~ /^\/\S*$/) {
7711 # A relative to the server URL
7712 return ($_[1], $_[2], $_[0], $_[4], $_[5], $_[6]);
7715 # A relative to the directory URL
7717 $page =~ s/[^\/]+$//;
7718 return ($_[1], $_[2], $page.$_[0], $_[4], $_[5], $_[6]);
7722 =head2 check_clicks_function
7724 Returns HTML for a JavaScript function called check_clicks that returns
7725 true when first called, but false subsequently. Useful on onClick for
7726 critical buttons. Deprecated, as this method of preventing duplicate actions
7730 sub check_clicks_function
7735 function check_clicks(form)
7742 for(i=0; i<form.length; i++)
7743 form.elements[i].disabled = true;
7752 =head2 load_entities_map
7754 Returns a hash ref containing mappings between HTML entities (like ouml) and
7755 ascii values (like 246). Mainly for internal use.
7758 sub load_entities_map
7760 if (!%entities_map_cache) {
7762 open(EMAP, "$root_directory/entities_map.txt");
7764 if (/^(\d+)\s+(\S+)/) {
7765 $entities_map_cache{$2} = $1;
7770 return \%entities_map_cache;
7773 =head2 entities_to_ascii(string)
7775 Given a string containing HTML entities like ö and 7, replace them
7776 with their ASCII equivalents.
7779 sub entities_to_ascii
7782 my $emap = &load_entities_map();
7783 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7784 $str =~ s/&#(\d+);/chr($1)/ge;
7788 =head2 get_product_name
7790 Returns either 'webmin' or 'usermin', depending on which program the current
7791 module is in. Useful for modules that can be installed into either.
7794 sub get_product_name
7796 return $gconfig{'product'} if (defined($gconfig{'product'}));
7797 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7802 Returns the character set for the current language, such as iso-8859-1.
7807 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7808 $current_lang_info->{'charset'} ?
7809 $current_lang_info->{'charset'} : $default_charset;
7813 =head2 get_display_hostname
7815 Returns the system's hostname for UI display purposes. This may be different
7816 from the actual hostname if you administrator has configured it so in the
7817 Webmin Configuration module.
7820 sub get_display_hostname
7822 if ($gconfig{'hostnamemode'} == 0) {
7823 return &get_system_hostname();
7825 elsif ($gconfig{'hostnamemode'} == 3) {
7826 return $gconfig{'hostnamedisplay'};
7829 my $h = $ENV{'HTTP_HOST'};
7831 if ($gconfig{'hostnamemode'} == 2) {
7832 $h =~ s/^(www|ftp|mail)\.//i;
7838 =head2 save_module_config([&config], [modulename])
7840 Saves the configuration for some module. The config parameter is an optional
7841 hash reference of names and values to save, which defaults to the global
7842 %config hash. The modulename parameter is the module to update the config
7843 file, which defaults to the current module.
7846 sub save_module_config
7848 my $c = $_[0] || { &get_module_variable('%config') };
7849 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7850 &write_file("$config_directory/$m/config", $c);
7853 =head2 save_user_module_config([&config], [modulename])
7855 Saves the user's Usermin preferences for some module. The config parameter is
7856 an optional hash reference of names and values to save, which defaults to the
7857 global %userconfig hash. The modulename parameter is the module to update the
7858 config file, which defaults to the current module.
7861 sub save_user_module_config
7863 my $c = $_[0] || { &get_module_variable('%userconfig') };
7864 my $m = $_[1] || &get_module_name();
7865 my $ucd = $user_config_directory;
7867 my @uinfo = @remote_user_info ? @remote_user_info
7868 : getpwnam($remote_user);
7869 return if (!@uinfo || !$uinfo[7]);
7870 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7872 &write_file("$ucd/$m/config", $c);
7875 =head2 nice_size(bytes, [min])
7877 Converts a number of bytes into a number followed by a suffix like GB, MB
7878 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7879 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7884 my ($units, $uname);
7885 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7886 $units = 1024*1024*1024*1024;
7889 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7890 $units = 1024*1024*1024;
7893 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7897 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7905 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7907 return $sz." ".$uname;
7910 =head2 get_perl_path
7912 Returns the path to Perl currently in use, such as /usr/bin/perl.
7917 if (open(PERL, "$config_directory/perl-path")) {
7923 return $^X if (-x $^X);
7924 return &has_command("perl");
7927 =head2 get_goto_module([&mods])
7929 Returns the details of a module that the current user should be re-directed
7930 to after logging in, or undef if none. Useful for themes.
7935 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7936 if ($gconfig{'gotomodule'}) {
7937 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7938 return $goto if ($goto);
7940 if (@mods == 1 && $gconfig{'gotoone'}) {
7946 =head2 select_all_link(field, form, [text])
7948 Returns HTML for a 'Select all' link that uses Javascript to select
7949 multiple checkboxes with the same name. The parameters are :
7951 =item field - Name of the checkbox inputs.
7953 =item form - Index of the form on the page.
7955 =item text - Message for the link, defaulting to 'Select all'.
7960 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7961 my ($field, $form, $text) = @_;
7963 $text ||= $text{'ui_selall'};
7964 return "<a class='select_all' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = true; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = true; } } return false'>$text</a>";
7967 =head2 select_invert_link(field, form, text)
7969 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7970 selection on multiple checkboxes with the same name. The parameters are :
7972 =item field - Name of the checkbox inputs.
7974 =item form - Index of the form on the page.
7976 =item text - Message for the link, defaulting to 'Invert selection'.
7979 sub select_invert_link
7981 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7982 my ($field, $form, $text) = @_;
7984 $text ||= $text{'ui_selinv'};
7985 return "<a class='select_invert' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = !ff.checked; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = !ff[i].checked; } } return false'>$text</a>";
7988 =head2 select_rows_link(field, form, text, &rows)
7990 Returns HTML for a link that uses Javascript to select rows with particular
7991 values for their checkboxes. The parameters are :
7993 =item field - Name of the checkbox inputs.
7995 =item form - Index of the form on the page.
7997 =item text - Message for the link, de
7999 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
8002 sub select_rows_link
8004 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
8005 my ($field, $form, $text, $rows) = @_;
8007 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
8008 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
8009 $js .= "return false;";
8010 return "<a href='#' onClick='$js'>$text</a>";
8013 =head2 check_pid_file(file)
8015 Given a pid file, returns the PID it contains if the process is running.
8020 open(PIDFILE, $_[0]) || return undef;
8021 my $pid = <PIDFILE>;
8023 $pid =~ /^\s*(\d+)/ || return undef;
8024 kill(0, $1) || return undef;
8030 Return the local os-specific library name to this module. For internal use only.
8035 my $mn = &get_module_name();
8036 my $md = &module_root_directory($mn);
8037 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
8038 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
8040 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
8041 return "$mn-$gconfig{'os_type'}-lib.pl";
8043 elsif (-r "$md/$mn-generic-lib.pl") {
8044 return "$mn-generic-lib.pl";
8051 =head2 module_root_directory(module)
8053 Given a module name, returns its root directory. On a typical Webmin install,
8054 all modules are under the same directory - but it is theoretically possible to
8058 sub module_root_directory
8060 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
8061 if (@root_directories > 1) {
8062 foreach my $r (@root_directories) {
8068 return "$root_directories[0]/$d";
8071 =head2 list_mime_types
8073 Returns a list of all known MIME types and their extensions, as a list of hash
8074 references with keys :
8076 =item type - The MIME type, like text/plain.
8078 =item exts - A list of extensions, like .doc and .avi.
8080 =item desc - A human-readable description for the MIME type.
8085 if (!@list_mime_types_cache) {
8087 open(MIME, "$root_directory/mime.types");
8091 if (s/#\s*(.*)$//g) {
8094 my ($type, @exts) = split(/\s+/);
8096 push(@list_mime_types_cache, { 'type' => $type,
8103 return @list_mime_types_cache;
8106 =head2 guess_mime_type(filename, [default])
8108 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
8109 The optional default parameter sets a default type of use if none is found,
8110 which defaults to application/octet-stream.
8115 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
8117 foreach my $t (&list_mime_types()) {
8118 foreach my $e (@{$t->{'exts'}}) {
8119 return $t->{'type'} if (lc($e) eq lc($ext));
8123 return @_ > 1 ? $_[1] : "application/octet-stream";
8126 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
8128 Opens a file handle for writing to a temporary file, which will only be
8129 renamed over the real file when the handle is closed. This allows critical
8130 files like /etc/shadow to be updated safely, even if writing fails part way
8131 through due to lack of disk space. The parameters are :
8133 =item handle - File handle to open, as you would use in Perl's open function.
8135 =item file - Full path to the file to write, prefixed by > or >> to indicate over-writing or appending. In append mode, no temp file is used.
8137 =item no-error - By default, this function will call error if the open fails. Setting this parameter to 1 causes it to return 0 on failure, and set $! with the error code.
8139 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
8141 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
8147 # Just getting a temp file
8148 if (!defined($main::open_tempfiles{$_[0]})) {
8149 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
8150 my $dir = $1 || "/";
8151 my $tmp = "$dir/$2.webmintmp.$$";
8152 $main::open_tempfiles{$_[0]} = $tmp;
8153 push(@main::temporary_files, $tmp);
8155 return $main::open_tempfiles{$_[0]};
8159 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8160 $fh = &callers_package($fh);
8162 my %gaccess = &get_module_acl(undef, "");
8163 my $db = $gconfig{'debug_what_write'};
8164 if ($file =~ /\r|\n|\0/) {
8165 if ($noerror) { return 0; }
8166 else { &error("Filename contains invalid characters"); }
8168 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
8169 # Read-only mode .. veto all writes
8170 print STDERR "vetoing write to $file\n";
8171 return open($fh, ">$null_file");
8173 elsif ($file =~ /^(>|>>|)nul$/i) {
8174 # Write to Windows null device
8175 &webmin_debug_log($1 eq ">" ? "WRITE" :
8176 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
8178 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
8179 # Writes to /dev/null or TTYs don't need to be handled
8180 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
8181 return open($fh, $file);
8183 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
8184 &webmin_debug_log("WRITE", $1) if ($db);
8185 # Over-writing a file, via a temp file
8187 $file = &translate_filename($file);
8189 # Open the link target instead
8190 $file = &resolve_links($file);
8193 # Cannot open a directory!
8194 if ($noerror) { return 0; }
8195 else { &error("Cannot write to directory $file"); }
8197 my $tmp = &open_tempfile($file);
8198 my $ex = open($fh, ">$tmp");
8199 if (!$ex && $! =~ /permission/i) {
8200 # Could not open temp file .. try opening actual file
8202 $ex = open($fh, ">$file");
8203 delete($main::open_tempfiles{$file});
8206 $main::open_temphandles{$fh} = $file;
8209 if (!$ex && !$noerror) {
8210 &error(&text("efileopen", $file, $!));
8214 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
8215 # Just writing direct to a file
8216 &webmin_debug_log("WRITE", $1) if ($db);
8218 $file = &translate_filename($file);
8219 my @old_attributes = &get_clear_file_attributes($file);
8220 my $ex = open($fh, ">$file");
8221 &reset_file_attributes($file, \@old_attributes);
8222 $main::open_temphandles{$fh} = $file;
8223 if (!$ex && !$noerror) {
8224 &error(&text("efileopen", $file, $!));
8229 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
8230 # Appending to a file .. nothing special to do
8231 &webmin_debug_log("APPEND", $1) if ($db);
8233 $file = &translate_filename($file);
8234 my @old_attributes = &get_clear_file_attributes($file);
8235 my $ex = open($fh, ">>$file");
8236 &reset_file_attributes($file, \@old_attributes);
8237 $main::open_temphandles{$fh} = $file;
8238 if (!$ex && !$noerror) {
8239 &error(&text("efileopen", $file, $!));
8244 elsif ($file =~ /^([a-zA-Z]:)?\//) {
8245 # Read mode .. nothing to do here
8246 &webmin_debug_log("READ", $file) if ($db);
8247 $file = &translate_filename($file);
8248 return open($fh, $file);
8250 elsif ($file eq ">" || $file eq ">>") {
8251 my ($package, $filename, $line) = caller;
8252 if ($noerror) { return 0; }
8253 else { &error("Missing file to open at ${package}::${filename} line $line"); }
8256 my ($package, $filename, $line) = caller;
8257 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
8262 =head2 close_tempfile(file|handle)
8264 Copies a temp file to the actual file, assuming that all writes were
8265 successful. The handle must have been one passed to open_tempfile.
8271 my $fh = &callers_package($_[0]);
8273 if (defined($file = $main::open_temphandles{$fh})) {
8275 close($fh) || &error(&text("efileclose", $file, $!));
8276 delete($main::open_temphandles{$fh});
8277 return &close_tempfile($file);
8279 elsif (defined($main::open_tempfiles{$_[0]})) {
8281 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
8282 my @st = stat($_[0]);
8283 if (&is_selinux_enabled() && &has_command("chcon")) {
8284 # Set original security context
8285 system("chcon --reference=".quotemeta($_[0]).
8286 " ".quotemeta($main::open_tempfiles{$_[0]}).
8287 " >/dev/null 2>&1");
8289 my @old_attributes = &get_clear_file_attributes($_[0]);
8290 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
8292 # Set original permissions and ownership
8293 chmod($st[2], $_[0]);
8294 chown($st[4], $st[5], $_[0]);
8296 &reset_file_attributes($_[0], \@old_attributes);
8297 delete($main::open_tempfiles{$_[0]});
8298 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
8299 if ($main::open_templocks{$_[0]}) {
8300 &unlock_file($_[0]);
8301 delete($main::open_templocks{$_[0]});
8306 # Must be closing a handle not associated with a file
8312 =head2 print_tempfile(handle, text, ...)
8314 Like the normal print function, but calls &error on failure. Useful when
8315 combined with open_tempfile, to ensure that a criticial file is never
8316 only partially written.
8321 my ($fh, @args) = @_;
8322 $fh = &callers_package($fh);
8323 (print $fh @args) || &error(&text("efilewrite",
8324 $main::open_temphandles{$fh} || $fh, $!));
8327 =head2 is_selinux_enabled
8329 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
8332 sub is_selinux_enabled
8334 if (!defined($main::selinux_enabled_cache)) {
8336 if ($gconfig{'os_type'} !~ /-linux$/) {
8337 # Not on linux, so no way
8338 $main::selinux_enabled_cache = 0;
8340 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
8341 # Use global config file
8342 $main::selinux_enabled_cache =
8343 $seconfig{'SELINUX'} eq 'disabled' ||
8344 !$seconfig{'SELINUX'} ? 0 : 1;
8347 # Use selinuxenabled command
8348 #$selinux_enabled_cache =
8349 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
8350 $main::selinux_enabled_cache = 0;
8353 return $main::selinux_enabled_cache;
8356 =head2 get_clear_file_attributes(file)
8358 Finds file attributes that may prevent writing, clears them and returns them
8359 as a list. May call error. Mainly for internal use by open_tempfile and
8363 sub get_clear_file_attributes
8367 if ($gconfig{'chattr'}) {
8368 # Get original immutable bit
8369 my $out = &backquote_command(
8370 "lsattr ".quotemeta($file)." 2>/dev/null");
8372 $out =~ s/\s\S+\n//;
8373 @old_attributes = grep { $_ ne '-' } split(//, $out);
8375 if (&indexof("i", @old_attributes) >= 0) {
8376 my $err = &backquote_logged(
8377 "chattr -i ".quotemeta($file)." 2>&1");
8379 &error("Failed to remove immutable bit on ".
8384 return @old_attributes;
8387 =head2 reset_file_attributes(file, &attributes)
8389 Put back cleared attributes on some file. May call error. Mainly for internal
8390 use by close_tempfile.
8393 sub reset_file_attributes
8395 my ($file, $old_attributes) = @_;
8396 if (&indexof("i", @$old_attributes) >= 0) {
8397 my $err = &backquote_logged(
8398 "chattr +i ".quotemeta($file)." 2>&1");
8400 &error("Failed to restore immutable bit on ".
8406 =head2 cleanup_tempnames
8408 Remove all temporary files generated using transname. Typically only called
8409 internally when a Webmin script exits.
8412 sub cleanup_tempnames
8414 foreach my $t (@main::temporary_files) {
8417 @main::temporary_files = ( );
8420 =head2 open_lock_tempfile([handle], file, [no-error])
8422 Returns a temporary file for writing to some actual file, and also locks it.
8423 Effectively the same as calling lock_file and open_tempfile on the same file,
8424 but calls the unlock for you automatically when it is closed.
8427 sub open_lock_tempfile
8429 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8430 $fh = &callers_package($fh);
8431 my $lockfile = $file;
8432 $lockfile =~ s/^[^\/]*//;
8433 if ($lockfile =~ /^\//) {
8434 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8436 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8441 $main::end_exit_status ||= $?;
8442 if ($$ == $main::initial_process_id) {
8443 # Exiting from initial process
8444 &cleanup_tempnames();
8445 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8446 $main::debug_log_start_module eq &get_module_name()) {
8447 my $len = time() - $main::debug_log_start_time;
8448 &webmin_debug_log("STOP", "runtime=$len");
8449 $main::debug_log_start_time = 0;
8451 if (!$ENV{'SCRIPT_NAME'} &&
8452 $main::initial_module_name eq &get_module_name()) {
8453 # In a command-line script - call the real exit, so that the
8454 # exit status gets properly propogated. In some cases this
8455 # was not happening.
8456 exit($main::end_exit_status);
8461 =head2 month_to_number(month)
8463 Converts a month name like feb to a number like 1.
8468 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8471 =head2 number_to_month(number)
8473 Converts a number like 1 to a month name like Feb.
8478 return ucfirst($number_to_month_map{$_[0]});
8481 =head2 get_rbac_module_acl(user, module)
8483 Returns a hash reference of RBAC overrides ACLs for some user and module.
8484 May return undef if none exist (indicating access denied), or the string *
8485 if full access is granted.
8488 sub get_rbac_module_acl
8490 my ($user, $mod) = @_;
8491 eval "use Authen::SolarisRBAC";
8492 return undef if ($@);
8495 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8496 # Automagic webmin.modulename.admin authorization exists .. allow access
8498 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8499 %rv = ( 'noconfig' => 1 );
8506 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8510 my ($auths, $acls) = split(/\s+/, $_);
8511 my @auths = split(/,/, $auths);
8513 my ($merge) = ($acls =~ s/^\+//);
8515 if ($auths eq "*") {
8516 # These ACLs apply to all RBAC users.
8517 # Only if there is some that match a specific authorization
8518 # later will they be used though.
8521 # Check each of the RBAC authorizations
8522 foreach my $a (@auths) {
8523 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8528 $foundany++ if ($gotall);
8531 # Found an RBAC authorization - return the ACLs
8532 return "*" if ($acls eq "*");
8533 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8535 # Just add to current set
8536 foreach my $a (keys %acl) {
8547 return !$foundany ? undef : %rv ? \%rv : undef;
8550 =head2 supports_rbac([module])
8552 Returns 1 if RBAC client support is available, such as on Solaris.
8557 return 0 if ($gconfig{'os_type'} ne 'solaris');
8558 eval "use Authen::SolarisRBAC";
8561 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8566 =head2 supports_ipv6()
8568 Returns 1 if outgoing IPv6 connections can be made
8573 return $ipv6_module_error ? 0 : 1;
8576 =head2 use_rbac_module_acl(user, module)
8578 Returns 1 if some user should use RBAC to get permissions for a module
8581 sub use_rbac_module_acl
8583 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8584 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8585 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8586 my %access = &get_module_acl($u, $m, 1);
8587 return $access{'rbac'} ? 1 : 0;
8590 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8592 Runs some command, possibly feeding it input and capturing output to the
8593 give files or scalar references. The parameters are :
8595 =item command - Full command to run, possibly including shell meta-characters.
8597 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8599 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8601 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8603 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8605 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8610 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8611 if (&is_readonly_mode() && !$safe) {
8612 print STDERR "Vetoing command $_[0]\n";
8616 $cmd = &translate_command($cmd);
8618 # Use ` operator where possible
8619 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8620 if (!$stdin && ref($stdout) && !$stderr) {
8621 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8622 $$stdout = `$cmd 2>$null_file`;
8625 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8626 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8627 $$stdout = `$cmd 2>&1`;
8630 elsif (!$stdin && !$stdout && !$stderr) {
8631 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8632 return system("$cmd >$null_file 2>$null_file <$null_file");
8636 $| = 1; # needed on some systems to flush before forking
8637 pipe(EXECSTDINr, EXECSTDINw);
8638 pipe(EXECSTDOUTr, EXECSTDOUTw);
8639 pipe(EXECSTDERRr, EXECSTDERRw);
8641 if (!($pid = fork())) {
8645 open(STDIN, "<&EXECSTDINr");
8646 open(STDOUT, ">&EXECSTDOUTw");
8647 if (ref($stderr) && $stderr eq $stdout) {
8648 open(STDERR, ">&EXECSTDOUTw");
8651 open(STDERR, ">&EXECSTDERRw");
8658 my $fullcmd = "($cmd)";
8659 if ($stdin && !ref($stdin)) {
8660 $fullcmd .= " <$stdin";
8662 if ($stdout && !ref($stdout)) {
8663 $fullcmd .= " >$stdout";
8665 if ($stderr && !ref($stderr)) {
8666 if ($stderr eq $stdout) {
8667 $fullcmd .= " 2>&1";
8670 $fullcmd .= " 2>$stderr";
8673 if ($gconfig{'os_type'} eq 'windows') {
8677 exec("/bin/sh", "-c", $fullcmd);
8679 print "Exec failed : $!\n";
8686 # Feed input and capture output
8688 if ($stdin && ref($stdin)) {
8689 print EXECSTDINw $$stdin;
8692 if ($stdout && ref($stdout)) {
8694 while(<EXECSTDOUTr>) {
8699 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8701 while(<EXECSTDERRr>) {
8712 =head2 open_readfile(handle, file)
8714 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8715 exactly the same as Perl's open function.
8720 my ($fh, $file) = @_;
8721 $fh = &callers_package($fh);
8722 my $realfile = &translate_filename($file);
8723 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8724 return open($fh, "<".$realfile);
8727 =head2 open_execute_command(handle, command, output?, safe?)
8729 Runs some command, with the specified file handle set to either write to it if
8730 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8731 indicates if the command modifies the state of the system or not.
8734 sub open_execute_command
8736 my ($fh, $cmd, $mode, $safe) = @_;
8737 $fh = &callers_package($fh);
8738 my $realcmd = &translate_command($cmd);
8739 if (&is_readonly_mode() && !$safe) {
8740 # Don't actually run it
8741 print STDERR "vetoing command $cmd\n";
8744 return open($fh, ">$null_file");
8747 return open($fh, $null_file);
8751 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8752 if ($gconfig{'debug_what_cmd'});
8754 return open($fh, "| $cmd");
8756 elsif ($mode == 1) {
8757 return open($fh, "$cmd 2>$null_file |");
8759 elsif ($mode == 2) {
8760 return open($fh, "$cmd 2>&1 |");
8764 =head2 translate_filename(filename)
8766 Applies all relevant registered translation functions to a filename. Mostly
8767 for internal use, and typically does nothing.
8770 sub translate_filename
8772 my ($realfile) = @_;
8773 my @funcs = grep { $_->[0] eq &get_module_name() ||
8774 !defined($_->[0]) } @main::filename_callbacks;
8775 foreach my $f (@funcs) {
8777 $realfile = &$func($realfile, @{$f->[2]});
8782 =head2 translate_command(filename)
8784 Applies all relevant registered translation functions to a command. Mostly
8785 for internal use, and typically does nothing.
8788 sub translate_command
8791 my @funcs = grep { $_->[0] eq &get_module_name() ||
8792 !defined($_->[0]) } @main::command_callbacks;
8793 foreach my $f (@funcs) {
8795 $realcmd = &$func($realcmd, @{$f->[2]});
8800 =head2 register_filename_callback(module|undef, &function, &args)
8802 Registers some function to be called when the specified module (or all
8803 modules) tries to open a file for reading and writing. The function must
8804 return the actual file to open. This allows you to override which files
8805 other code actually operates on, via the translate_filename function.
8808 sub register_filename_callback
8810 my ($mod, $func, $args) = @_;
8811 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8814 =head2 register_command_callback(module|undef, &function, &args)
8816 Registers some function to be called when the specified module (or all
8817 modules) tries to execute a command. The function must return the actual
8818 command to run. This allows you to override which commands other other code
8819 actually runs, via the translate_command function.
8822 sub register_command_callback
8824 my ($mod, $func, $args) = @_;
8825 push(@main::command_callbacks, [ $mod, $func, $args ]);
8828 =head2 capture_function_output(&function, arg, ...)
8830 Captures output that some function prints to STDOUT, and returns it. Useful
8831 for functions outside your control that print data when you really want to
8832 manipulate it before output.
8835 sub capture_function_output
8837 my ($func, @args) = @_;
8838 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8839 my $old = select(SOCKET1);
8840 my @rv = &$func(@args);
8849 return wantarray ? ($out, \@rv) : $out;
8852 =head2 capture_function_output_tempfile(&function, arg, ...)
8854 Behaves the same as capture_function_output, but uses a temporary file
8855 to avoid buffer full problems.
8858 sub capture_function_output_tempfile
8860 my ($func, @args) = @_;
8861 my $temp = &transname();
8862 open(BUFFER, ">$temp");
8863 my $old = select(BUFFER);
8864 my @rv = &$func(@args);
8867 my $out = &read_file_contents($temp);
8868 &unlink_file($temp);
8869 return wantarray ? ($out, \@rv) : $out;
8872 =head2 modules_chooser_button(field, multiple, [form])
8874 Returns HTML for a button for selecting one or many Webmin modules.
8875 field - Name of the HTML field to place the module names into.
8876 multiple - Set to 1 if multiple modules can be selected.
8877 form - Index of the form on the page.
8880 sub modules_chooser_button
8882 return &theme_modules_chooser_button(@_)
8883 if (defined(&theme_modules_chooser_button));
8884 my $form = defined($_[2]) ? $_[2] : 0;
8885 my $w = $_[1] ? 700 : 500;
8887 if ($_[1] && $gconfig{'db_sizemodules'}) {
8888 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8890 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8891 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8893 return "<input type=button onClick='ifield = document.forms[$form].$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/module_chooser.cgi?multi=$_[1]&module=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
8896 =head2 substitute_template(text, &hash)
8898 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8899 the text replaces it with the value of the hash key foo. Also supports blocks
8900 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8901 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8904 sub substitute_template
8906 # Add some extra fixed parameters to the hash
8907 my %hash = %{$_[1]};
8908 $hash{'hostname'} = &get_system_hostname();
8909 $hash{'webmin_config'} = $config_directory;
8910 $hash{'webmin_etc'} = $config_directory;
8911 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8912 $hash{'webmin_var'} = $var_directory;
8914 # Add time-based parameters, for use in DNS
8915 $hash{'current_time'} = time();
8916 my @tm = localtime($hash{'current_time'});
8917 $hash{'current_year'} = $tm[5]+1900;
8918 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8919 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8920 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8921 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8922 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8924 # Actually do the substition
8926 foreach my $s (keys %hash) {
8927 next if ($s eq ''); # Prevent just $ from being subbed
8930 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8931 $rv =~ s/\$\Q$us\E/$sv/g;
8933 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8934 # and ${IF}..${ENDIF} with value
8935 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8936 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8938 # Replace $IF..$ELSE..$ENDIF block with first value,
8939 # and $IF..$ENDIF with value
8940 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8941 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8943 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8944 # matching, nothing if not
8945 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8946 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8948 # Replace $IFEQ..$ENDIFEQ block with first value if
8949 # matching, nothing if not
8950 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8951 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8954 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8955 # and ${IF}..${ENDIF} with nothing
8956 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8957 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8959 # Replace $IF..$ELSE..$ENDIF block with second value,
8960 # and $IF..$ENDIF with nothing
8961 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8962 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8964 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8965 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8966 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8970 # Now assume any $IF blocks whose variables are not present in the hash
8971 # evaluate to false.
8972 # $IF...$ELSE x $ENDIF => x
8973 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8974 # $IF...x...$ENDIF => (nothing)
8975 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8976 # ${var} => (nothing)
8977 $rv =~ s/\$\{[A-Z]+\}//g;
8982 =head2 running_in_zone
8984 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8985 disable module and features that are not appropriate, like those that modify
8986 mounted filesystems.
8991 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8992 $gconfig{'os_version'} < 10);
8993 my $zn = `zonename 2>$null_file`;
8995 return $zn && $zn ne "global";
8998 =head2 running_in_vserver
9000 Returns 1 if the current Webmin instance is running in a Linux VServer.
9001 Used to disable modules and features that are not appropriate.
9004 sub running_in_vserver
9006 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
9009 open(MTAB, "/etc/mtab");
9011 my ($dev, $mp) = split(/\s+/, $_);
9012 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
9021 =head2 running_in_xen
9023 Returns 1 if Webmin is running inside a Xen instance, by looking
9024 at /proc/xen/capabilities.
9029 return 0 if (!-r "/proc/xen/capabilities");
9030 my $cap = &read_file_contents("/proc/xen/capabilities");
9031 return $cap =~ /control_d/ ? 0 : 1;
9034 =head2 running_in_openvz
9036 Returns 1 if Webmin is running inside an OpenVZ container, by looking
9037 at /proc/vz/veinfo for a non-zero line.
9040 sub running_in_openvz
9042 return 0 if (!-r "/proc/vz/veinfo");
9043 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
9044 return 0 if (!$lref || !@$lref);
9045 foreach my $l (@$lref) {
9047 my @ll = split(/\s+/, $l);
9048 return 0 if ($ll[0] eq '0');
9053 =head2 list_categories(&modules, [include-empty])
9055 Returns a hash mapping category codes to names, including any custom-defined
9056 categories. The modules parameter must be an array ref of module hash objects,
9057 as returned by get_all_module_infos.
9062 my ($mods, $empty) = @_;
9063 my (%cats, %catnames);
9064 &read_file("$config_directory/webmin.catnames", \%catnames);
9065 foreach my $o (@lang_order_list) {
9066 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
9071 foreach my $m (@$mods) {
9072 my $c = $m->{'category'};
9073 next if ($cats{$c});
9074 if (defined($catnames{$c})) {
9075 $cats{$c} = $catnames{$c};
9077 elsif ($text{"category_$c"}) {
9078 $cats{$c} = $text{"category_$c"};
9081 # try to get category name from module ..
9082 my %mtext = &load_language($m->{'dir'});
9083 if ($mtext{"category_$c"}) {
9084 $cats{$c} = $mtext{"category_$c"};
9087 $c = $m->{'category'} = "";
9088 $cats{$c} = $text{"category_$c"};
9095 =head2 is_readonly_mode
9097 Returns 1 if the current user is in read-only mode, and thus all writes
9098 to files and command execution should fail.
9101 sub is_readonly_mode
9103 if (!defined($main::readonly_mode_cache)) {
9104 my %gaccess = &get_module_acl(undef, "");
9105 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
9107 return $main::readonly_mode_cache;
9110 =head2 command_as_user(user, with-env?, command, ...)
9112 Returns a command to execute some command as the given user, using the
9113 su statement. If on Linux, the /bin/sh shell is forced in case the user
9114 does not have a valid shell. If with-env is set to 1, the -s flag is added
9115 to the su command to read the user's .profile or .bashrc file.
9120 my ($user, $env, @args) = @_;
9121 my @uinfo = getpwnam($user);
9122 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
9123 # User shell doesn't appear to be valid
9124 if ($gconfig{'os_type'} =~ /-linux$/) {
9125 # Use -s /bin/sh to force it
9126 $shellarg = " -s /bin/sh";
9128 elsif ($gconfig{'os_type'} eq 'freebsd' ||
9129 $gconfig{'os_type'} eq 'solaris' &&
9130 $gconfig{'os_version'} >= 11 ||
9131 $gconfig{'os_type'} eq 'macos') {
9132 # Use -m and force /bin/sh
9133 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
9137 my $rv = "su".($env ? " -" : "").$shellarg.
9138 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
9142 =head2 list_osdn_mirrors(project, file)
9144 This function is now deprecated in favor of letting sourceforge just
9145 redirect to the best mirror, and now just returns their primary download URL.
9148 sub list_osdn_mirrors
9150 my ($project, $file) = @_;
9151 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
9153 'mirror' => 'downloads' } );
9156 =head2 convert_osdn_url(url)
9158 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
9159 or http://prdownloads.sourceforge.net/project/file.zip , convert it
9160 to a real URL on the sourceforge download redirector.
9163 sub convert_osdn_url
9166 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
9167 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
9168 # Always use the Sourceforge mail download URL, which does
9169 # a location-based redirect for us
9170 my ($project, $file) = ($1, $2);
9171 $url = "http://prdownloads.sourceforge.net/sourceforge/".
9173 return wantarray ? ( $url, 0 ) : $url;
9176 # Some other source .. don't change
9177 return wantarray ? ( $url, 2 ) : $url;
9181 =head2 get_current_dir
9183 Returns the directory the current process is running in.
9189 if ($gconfig{'os_type'} eq 'windows') {
9202 =head2 supports_users
9204 Returns 1 if the current OS supports Unix user concepts and functions like
9205 su , getpw* and so on. This will be true on Linux and other Unixes, but false
9211 return $gconfig{'os_type'} ne 'windows';
9214 =head2 supports_symlinks
9216 Returns 1 if the current OS supports symbolic and hard links. This will not
9217 be the case on Windows.
9220 sub supports_symlinks
9222 return $gconfig{'os_type'} ne 'windows';
9225 =head2 quote_path(path)
9227 Returns a path with safe quoting for the current operating system.
9233 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
9234 # Windows only supports "" style quoting
9238 return quotemeta($path);
9242 =head2 get_windows_root
9244 Returns the base windows system directory, like c:/windows.
9247 sub get_windows_root
9249 if ($ENV{'SystemRoot'}) {
9250 my $rv = $ENV{'SystemRoot'};
9255 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
9259 =head2 read_file_contents(file)
9261 Given a filename, returns its complete contents as a string. Effectively
9262 the same as the Perl construct `cat file`.
9265 sub read_file_contents
9267 &open_readfile(FILE, $_[0]) || return undef;
9274 =head2 unix_crypt(password, salt)
9276 Performs Unix encryption on a password, using the built-in crypt function or
9277 the Crypt::UnixCrypt module if the former does not work. The salt parameter
9278 must be either an already-hashed password, or a two-character alpha-numeric
9284 my ($pass, $salt) = @_;
9285 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
9286 my $rv = eval "crypt(\$pass, \$salt)";
9288 return $rv if ($rv && !$@);
9289 eval "use Crypt::UnixCrypt";
9291 return Crypt::UnixCrypt::crypt($pass, $salt);
9294 &error("Failed to encrypt password : $err");
9298 =head2 split_quoted_string(string)
9300 Given a string like I<foo "bar baz" quux>, returns the array :
9304 sub split_quoted_string
9308 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
9309 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
9310 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
9317 =head2 write_to_http_cache(url, file|&data)
9319 Updates the Webmin cache with the contents of the given file, possibly also
9320 clearing out old data. Mainly for internal use by http_download.
9323 sub write_to_http_cache
9325 my ($url, $file) = @_;
9326 return 0 if (!$gconfig{'cache_size'});
9328 # Don't cache downloads that look dynamic
9329 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
9333 # Check if the current module should do caching
9334 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9335 # Caching all except some modules
9336 my @mods = split(/\s+/, $1);
9337 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9339 elsif ($gconfig{'cache_mods'}) {
9340 # Only caching some modules
9341 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9342 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9348 $size = length($$file);
9351 my @st = stat($file);
9355 if ($size > $gconfig{'cache_size'}) {
9356 # Bigger than the whole cache - so don't save it
9361 $cfile = "$main::http_cache_directory/$cfile";
9363 # See how much we have cached currently, clearing old files
9365 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
9366 opendir(CACHEDIR, $main::http_cache_directory);
9367 foreach my $f (readdir(CACHEDIR)) {
9368 next if ($f eq "." || $f eq "..");
9369 my $path = "$main::http_cache_directory/$f";
9370 my @st = stat($path);
9371 if ($gconfig{'cache_days'} &&
9372 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9373 # This file is too old .. trash it
9378 push(@cached, [ $path, $st[7], $st[9] ]);
9382 @cached = sort { $a->[2] <=> $b->[2] } @cached;
9383 while($total+$size > $gconfig{'cache_size'} && @cached) {
9384 # Cache is too big .. delete some files until the new one will fit
9385 unlink($cached[0]->[0]);
9386 $total -= $cached[0]->[1];
9390 # Finally, write out the new file
9392 &open_tempfile(CACHEFILE, ">$cfile");
9393 &print_tempfile(CACHEFILE, $$file);
9394 &close_tempfile(CACHEFILE);
9397 my ($ok, $err) = ©_source_dest($file, $cfile);
9403 =head2 check_in_http_cache(url)
9405 If some URL is in the cache and valid, return the filename for it. Mainly
9406 for internal use by http_download.
9409 sub check_in_http_cache
9412 return undef if (!$gconfig{'cache_size'});
9414 # Check if the current module should do caching
9415 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9416 # Caching all except some modules
9417 my @mods = split(/\s+/, $1);
9418 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9420 elsif ($gconfig{'cache_mods'}) {
9421 # Only caching some modules
9422 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9423 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9428 $cfile = "$main::http_cache_directory/$cfile";
9429 my @st = stat($cfile);
9430 return undef if (!@st || !$st[7]);
9431 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9436 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9441 =head2 supports_javascript
9443 Returns 1 if the current browser is assumed to support javascript.
9446 sub supports_javascript
9448 if (defined(&theme_supports_javascript)) {
9449 return &theme_supports_javascript();
9451 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9454 =head2 get_module_name
9456 Returns the name of the Webmin module that called this function. For internal
9457 use only by other API functions.
9462 return &get_module_variable('$module_name');
9465 =head2 get_module_variable(name, [ref])
9467 Returns the value of some variable which is set in the caller's context, if
9468 using the new WebminCore package. For internal use only.
9471 sub get_module_variable
9473 my ($v, $wantref) = @_;
9474 my $slash = $wantref ? "\\" : "";
9475 my $thispkg = &web_libs_package();
9476 if ($thispkg eq 'WebminCore') {
9477 my ($vt, $vn) = split('', $v, 2);
9479 for(my $i=0; ($callpkg) = caller($i); $i++) {
9480 last if ($callpkg ne $thispkg);
9482 return eval "${slash}${vt}${callpkg}::${vn}";
9484 return eval "${slash}${v}";
9487 =head2 clear_time_locale()
9489 Temporarily force the locale to C, until reset_time_locale is called. This is
9490 useful if your code is going to call C<strftime> from the POSIX package, and
9491 you want to ensure that the output is in a consistent format.
9494 sub clear_time_locale
9496 if ($main::clear_time_locale_count == 0) {
9499 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9500 POSIX::setlocale(POSIX::LC_TIME, "C");
9503 $main::clear_time_locale_count++;
9506 =head2 reset_time_locale()
9508 Revert the locale to whatever it was before clear_time_locale was called
9511 sub reset_time_locale
9513 if ($main::clear_time_locale_count == 1) {
9515 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9516 $main::clear_time_locale_old = undef;
9519 $main::clear_time_locale_count--;
9522 =head2 callers_package(filehandle)
9524 Convert a non-module filehandle like FOO to one qualified with the
9525 caller's caller's package, like fsdump::FOO. For internal use only.
9531 my $callpkg = (caller(1))[0];
9532 my $thispkg = &web_libs_package();
9533 if (!ref($fh) && $fh !~ /::/ &&
9534 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9535 $fh = $callpkg."::".$fh;
9540 =head2 web_libs_package()
9542 Returns the package this code is in. We can't always trust __PACKAGE__. For
9546 sub web_libs_package
9548 if ($called_from_webmin_core) {
9549 return "WebminCore";
9554 =head2 get_userdb_string
9556 Returns the URL-style string for connecting to the users and groups database
9559 sub get_userdb_string
9561 return undef if ($main::no_miniserv_userdb);
9563 &get_miniserv_config(\%miniserv);
9564 return $miniserv{'userdb'};
9567 =head2 connect_userdb(string)
9569 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9570 On failure returns an error message string. In an array context, returns the
9577 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9578 if ($proto eq "mysql") {
9579 # Connect to MySQL with DBI
9580 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9581 $drh || return $text{'sql_emysqldriver'};
9582 my ($host, $port) = split(/:/, $host);
9583 my $cstr = "database=$prefix;host=$host";
9584 $cstr .= ";port=$port" if ($port);
9585 my $dbh = $drh->connect($cstr, $user, $pass, { });
9586 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9587 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9589 elsif ($proto eq "postgresql") {
9590 # Connect to PostgreSQL with DBI
9591 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9592 $drh || return $text{'sql_epostgresqldriver'};
9593 my ($host, $port) = split(/:/, $host);
9594 my $cstr = "dbname=$prefix;host=$host";
9595 $cstr .= ";port=$port" if ($port);
9596 my $dbh = $drh->connect($cstr, $user, $pass);
9597 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9598 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9600 elsif ($proto eq "ldap") {
9601 # Connect with perl LDAP module
9602 eval "use Net::LDAP";
9603 $@ && return $text{'sql_eldapdriver'};
9604 my ($host, $port) = split(/:/, $host);
9605 my $scheme = $args->{'scheme'} || 'ldap';
9607 $port = $scheme eq 'ldaps' ? 636 : 389;
9609 my $ldap = Net::LDAP->new($host,
9611 'scheme' => $scheme);
9612 $ldap || return &text('sql_eldapconnect', $host);
9614 if ($args->{'tls'}) {
9615 # Switch to TLS mode
9616 eval { $mesg = $ldap->start_tls(); };
9617 if ($@ || !$mesg || $mesg->code) {
9618 return &text('sql_eldaptls',
9619 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9622 # Login to the server
9624 $mesg = $ldap->bind(dn => $user, password => $pass);
9627 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9629 if (!$mesg || $mesg->code) {
9630 return &text('sql_eldaplogin', $user,
9631 $mesg ? $mesg->error : "Unknown error");
9633 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9636 return "Unknown protocol $proto";
9640 =head2 disconnect_userdb(string, &handle)
9642 Closes a handle opened by connect_userdb
9645 sub disconnect_userdb
9648 if ($str =~ /^(mysql|postgresql):/) {
9650 if (!$h->{'AutoCommit'}) {
9655 elsif ($str =~ /^ldap:/) {
9662 =head2 split_userdb_string(string)
9664 Converts a string like mysql://user:pass@host/db into separate parts
9667 sub split_userdb_string
9670 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9671 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9672 ($1, $2, $3, $4, $5, $7);
9673 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9674 return ($proto, $user, $pass, $host, $prefix, \%args);
9679 $done_web_lib_funcs = 1;