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 # Running under some web server other than miniserv, so do nothing
1878 if ($gconfig{'os_type'} ne 'windows') {
1879 # On Unix systems, we can restart with a signal
1880 my ($pid, $addr, $i);
1881 $miniserv{'inetd'} && return;
1882 my @oldst = stat($miniserv{'pidfile'});
1883 $pid = $ENV{'MINISERV_PID'};
1885 if (!open(PID, $miniserv{'pidfile'})) {
1886 print STDERR "PID file $miniserv{'pidfile'} does ",
1893 print STDERR "Invalid PID file $miniserv{'pidfile'}\n";
1896 if (!kill(0, $pid)) {
1897 print STDERR "PID $pid from file $miniserv{'pidfile'} ",
1903 # Just signal miniserv to restart
1904 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1906 # Wait till new PID is written, indicating a restart
1907 for($i=0; $i<60; $i++) {
1909 my @newst = stat($miniserv{'pidfile'});
1910 last if ($newst[9] != $oldst[9]);
1912 $i < 60 || &error("Webmin server did not write new PID file");
1914 ## Totally kill the process and re-run it
1915 #$SIG{'TERM'} = 'IGNORE';
1916 #&kill_logged('TERM', $pid);
1917 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1920 # On Windows, we need to use the flag file
1921 open(TOUCH, ">$miniserv{'restartflag'}");
1926 # Wait for miniserv to come back up
1927 my $addr = $miniserv{'bind'} || "127.0.0.1";
1929 for($i=0; $i<20; $i++) {
1932 &open_socket($addr, $miniserv{'port'}, STEST, \$err);
1934 last if (!$err && ++$ok >= 2);
1936 $i < 20 || &error("Failed to restart Webmin server!");
1940 =head2 reload_miniserv
1942 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1943 configuration files. Not all changes will be applied though, such as the
1944 IP addresses and ports to accept connections on.
1949 return undef if (&is_readonly_mode());
1951 &get_miniserv_config(\%miniserv) || return;
1952 if ($main::webmin_script_type eq 'web' && !$ENV{"MINISERV_CONFIG"}) {
1953 # Running under some web server other than miniserv, so do nothing
1957 if ($gconfig{'os_type'} ne 'windows') {
1958 # Send a USR1 signal to re-read the config
1959 my ($pid, $addr, $i);
1960 $miniserv{'inetd'} && return;
1961 $pid = $ENV{'MINISERV_PID'};
1963 if (!open(PID, $miniserv{'pidfile'})) {
1964 print STDERR "PID file $miniserv{'pidfile'} does ",
1971 print STDERR "Invalid PID file $miniserv{'pidfile'}\n";
1974 if (!kill(0, $pid)) {
1975 print STDERR "PID $pid from file $miniserv{'pidfile'} ",
1980 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1982 # Make sure this didn't kill Webmin!
1984 if (!kill(0, $pid)) {
1985 print STDERR "USR1 signal killed Webmin - restarting\n";
1986 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1990 # On Windows, we need to use the flag file
1991 open(TOUCH, ">$miniserv{'reloadflag'}");
1996 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1998 Returns 1 if some module is supported on the current operating system, or the
1999 OS supplies as parameters. The parameters are :
2001 =item minfo - A hash ref of module information, as returned by get_module_info
2003 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
2005 =item os-version - The Webmin OS version to use, such as 13.0
2007 =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.
2010 sub check_os_support
2012 my $oss = $_[0]->{'os_support'};
2013 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
2014 # May provide usable API
2015 $oss .= " ".$_[0]->{'api_os_support'};
2017 if ($_[0]->{'nozone'} && &running_in_zone()) {
2018 # Not supported in a Solaris Zone
2021 if ($_[0]->{'novserver'} && &running_in_vserver()) {
2022 # Not supported in a Linux Vserver
2025 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
2026 # Not supported in an OpenVZ container
2029 return 1 if (!$oss || $oss eq '*');
2030 my $osver = $_[2] || $gconfig{'os_version'};
2031 my $ostype = $_[1] || $gconfig{'os_type'};
2034 my ($os, $ver, $codes);
2035 my ($neg) = ($oss =~ s/^!//); # starts with !
2036 $anyneg++ if ($neg);
2037 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2039 $os = $1; $ver = $2; $codes = $3; $oss = $4;
2041 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
2043 $os = $1; $ver = $2; $oss = $3;
2045 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2047 $os = $1; $codes = $2; $oss = $3;
2049 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
2051 $codes = $1; $oss = $2;
2053 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
2055 $os = $1; $oss = $2;
2058 next if ($os && !($os eq $ostype ||
2059 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
2060 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
2061 next if ($osver < $1 || $osver > $2);
2063 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
2064 next if ($osver < $1);
2066 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
2067 next if ($osver > $1);
2070 next if ($ver ne $osver);
2072 next if ($codes && !eval $codes);
2078 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2080 Downloads data from a HTTP url to a local file or string. The parameters are :
2082 =item host - The hostname part of the URL, such as www.google.com
2084 =item port - The HTTP port number, such as 80
2086 =item page - The filename part of the URL, like /index.html
2088 =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.
2090 =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.
2092 =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.
2094 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2096 =item user - If set, HTTP authentication is done with this username.
2098 =item pass - The HTTP password to use with the username above.
2100 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2102 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2104 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2106 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2111 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2112 $timeout, $osdn, $nocache, $headers) = @_;
2113 if ($gconfig{'debug_what_net'}) {
2114 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2115 ($user ? " user=$user pass=$pass" : "").
2116 (ref($dest) ? "" : " dest=$dest"));
2119 # Convert OSDN URL first
2120 my $prot = $ssl ? "https://" : "http://";
2121 my $portstr = $ssl && $port == 443 ||
2122 !$ssl && $port == 80 ? "" : ":$port";
2123 ($host, $port, $page, $ssl) = &parse_http_url(
2124 &convert_osdn_url($prot.$host.$portstr.$page));
2127 # Check if we already have cached the URL
2128 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2129 my $cfile = &check_in_http_cache($url);
2130 if ($cfile && !$nocache) {
2131 # Yes! Copy to dest file or variable
2132 &$cbfunc(6, $url) if ($cbfunc);
2134 &open_readfile(CACHEFILE, $cfile);
2136 $$dest = <CACHEFILE>;
2140 ©_source_dest($cfile, $dest);
2147 push(@headers, [ "Host", $host ]);
2148 push(@headers, [ "User-agent", "Webmin" ]);
2149 push(@headers, [ "Accept-language", "en" ]);
2151 my $auth = &encode_base64("$user:$pass");
2152 $auth =~ tr/\r\n//d;
2153 push(@headers, [ "Authorization", "Basic $auth" ]);
2155 foreach my $hname (keys %$headers) {
2156 push(@headers, [ $hname, $headers->{$hname} ]);
2159 # Actually download it
2160 $main::download_timed_out = undef;
2161 local $SIG{ALRM} = \&download_timeout;
2162 alarm($timeout || 60);
2163 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2165 $h = $main::download_timed_out if ($main::download_timed_out);
2167 if ($error) { $$error = $h; return; }
2168 else { &error($h); }
2170 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2171 $headers, $ssl, $nocache);
2172 if ((!$error || !$$error) && !$nocache) {
2173 &write_to_http_cache($url, $dest);
2177 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2179 Do a HTTP download, after the headers have been sent. For internal use only,
2180 typically called by http_download.
2183 sub complete_http_download
2185 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2191 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2192 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2194 if ($_[2]) { ${$_[2]} = $line; return; }
2195 else { &error("Download failed : $line"); }
2198 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2201 $line = &read_http_connection($_[0]);
2202 $line =~ tr/\r\n//d;
2203 $line =~ /^(\S+):\s+(.*)$/ || last;
2204 $header{lc($1)} = $2;
2205 push(@headers, [ lc($1), $2 ]);
2208 if ($main::download_timed_out) {
2209 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2210 else { &error($main::download_timed_out); }
2212 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2213 if ($rcode >= 300 && $rcode < 400) {
2214 # follow the redirect
2215 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2216 my ($host, $port, $page, $ssl);
2217 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2218 $ssl = $1 eq 'https' ? 1 : 0;
2223 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2224 $ssl = $1 eq 'https' ? 1 : 0;
2226 $port = $ssl ? 443 : 80;
2229 elsif ($header{'location'} =~ /^\// && $_[5]) {
2230 # Relative to same server
2234 $page = $header{'location'};
2236 elsif ($header{'location'}) {
2237 # Assume relative to same dir .. not handled
2238 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2239 else { &error("Invalid Location header $header{'location'}"); }
2242 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2243 else { &error("Missing Location header"); }
2246 ($page, $params) = split(/\?/, $page);
2248 $page .= "?".$params if (defined($params));
2249 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2250 undef, undef, undef, $_[4], $_[9], $_[7]);
2255 # Append to a variable
2256 while(defined($buf = &read_http_connection($_[0], 1024))) {
2258 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2264 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2265 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2266 else { &error("Failed to write to $_[1] : $!"); }
2268 binmode(PFILE); # For windows
2269 while(defined($buf = &read_http_connection($_[0], 1024))) {
2270 &print_tempfile(PFILE, $buf);
2271 $got += length($buf);
2272 &$cbfunc(3, $got) if ($cbfunc);
2274 &close_tempfile(PFILE);
2275 if ($header{'content-length'} &&
2276 $got != $header{'content-length'}) {
2277 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2278 else { &error("Download incomplete"); }
2281 &$cbfunc(4) if ($cbfunc);
2283 &close_http_connection($_[0]);
2287 =head2 http_post(host, port, page, content, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2289 Posts data to an HTTP url and downloads the response to a local file or string. The parameters are :
2291 =item host - The hostname part of the URL, such as www.google.com
2293 =item port - The HTTP port number, such as 80
2295 =item page - The filename part of the URL, like /index.html
2297 =item content - The data to post
2299 =item destfile - The local file to save the URL data to, like /tmp/index.html. This can also be a scalar reference, in which case the data will be appended to that scalar.
2301 =item error - If set to a scalar ref, the function will store any error message in this scalar and return 0 on failure, or 1 on success. If not set, it will simply call the error function if the download fails.
2303 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2305 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2307 =item user - If set, HTTP authentication is done with this username.
2309 =item pass - The HTTP password to use with the username above.
2311 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2313 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2315 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2317 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2322 my ($host, $port, $page, $content, $dest, $error, $cbfunc, $ssl, $user, $pass,
2323 $timeout, $osdn, $nocache, $headers) = @_;
2324 if ($gconfig{'debug_what_net'}) {
2325 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2326 ($user ? " user=$user pass=$pass" : "").
2327 (ref($dest) ? "" : " dest=$dest"));
2330 # Convert OSDN URL first
2331 my $prot = $ssl ? "https://" : "http://";
2332 my $portstr = $ssl && $port == 443 ||
2333 !$ssl && $port == 80 ? "" : ":$port";
2334 ($host, $port, $page, $ssl) = &parse_http_url(
2335 &convert_osdn_url($prot.$host.$portstr.$page));
2340 push(@headers, [ "Host", $host ]);
2341 push(@headers, [ "User-agent", "Webmin" ]);
2342 push(@headers, [ "Accept-language", "en" ]);
2343 push(@headers, [ "Content-type", "application/x-www-form-urlencoded" ]);
2344 push(@headers, [ "Content-length", length($content) ]);
2346 my $auth = &encode_base64("$user:$pass");
2347 $auth =~ tr/\r\n//d;
2348 push(@headers, [ "Authorization", "Basic $auth" ]);
2350 foreach my $hname (keys %$headers) {
2351 push(@headers, [ $hname, $headers->{$hname} ]);
2354 # Actually download it
2355 $main::download_timed_out = undef;
2356 local $SIG{ALRM} = \&download_timeout;
2357 alarm($timeout || 60);
2358 my $h = &make_http_connection($host, $port, $ssl, "POST", $page, \@headers);
2360 $h = $main::download_timed_out if ($main::download_timed_out);
2362 if ($error) { $$error = $h; return; }
2363 else { &error($h); }
2365 &write_http_connection($content."\r\n");
2366 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2367 $headers, $ssl, $nocache);
2368 if ((!$error || !$$error) && !$nocache) {
2369 &write_to_http_cache($url, $dest);
2373 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port], [no-cache])
2375 Download data from an FTP site to a local file. The parameters are :
2377 =item host - FTP server hostname
2379 =item file - File on the FTP server to download
2381 =item destfile - File on the Webmin system to download data to
2383 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2385 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2387 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2389 =item pass - Password for the username above.
2391 =item port - FTP server port number, which defaults to 21 if not set.
2393 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2398 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port, $nocache) = @_;
2400 if ($gconfig{'debug_what_net'}) {
2401 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2402 ($user ? " user=$user pass=$pass" : "").
2403 (ref($dest) ? "" : " dest=$dest"));
2407 if (&is_readonly_mode()) {
2408 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2410 else { &error("FTP connections not allowed in readonly mode"); }
2413 # Check if we already have cached the URL
2414 my $url = "ftp://".$host.$file;
2415 my $cfile = &check_in_http_cache($url);
2416 if ($cfile && !$nocache) {
2417 # Yes! Copy to dest file or variable
2418 &$cbfunc(6, $url) if ($cbfunc);
2420 &open_readfile(CACHEFILE, $cfile);
2422 $$dest = <CACHEFILE>;
2426 ©_source_dest($cfile, $dest);
2431 # Actually download it
2432 $main::download_timed_out = undef;
2433 local $SIG{ALRM} = \&download_timeout;
2436 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2437 # download through http-style proxy
2439 if (&open_socket($1, $2, "SOCK", \$error)) {
2441 if ($main::download_timed_out) {
2443 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2444 else { &error($main::download_timed_out); }
2446 my $esc = $_[1]; $esc =~ s/ /%20/g;
2447 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2448 my $portstr = $port == 21 ? "" : ":$port";
2449 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2450 print SOCK "User-agent: Webmin\r\n";
2451 if ($gconfig{'proxy_user'}) {
2452 my $auth = &encode_base64(
2453 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2454 $auth =~ tr/\r\n//d;
2455 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2458 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4],
2459 undef, undef, undef, undef, 0, $nocache);
2462 elsif (!$gconfig{'proxy_fallback'}) {
2464 if ($error) { $$error = $main::download_timed_out; return 0; }
2465 else { &error($main::download_timed_out); }
2470 # connect to host and login with real FTP protocol
2471 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2473 if ($main::download_timed_out) {
2474 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2475 else { &error($main::download_timed_out); }
2477 &ftp_command("", 2, $_[3]) || return 0;
2479 # Login as supplied user
2480 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2482 if (int($urv[1]/100) == 3) {
2483 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2487 # Login as anonymous
2488 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2490 if (int($urv[1]/100) == 3) {
2491 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2495 &$cbfunc(1, 0) if ($cbfunc);
2498 # get the file size and tell the callback
2499 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2500 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2501 defined($size) || return 0;
2503 &$cbfunc(2, int($size));
2507 my $pasv = &ftp_command("PASV", 2, $_[3]);
2508 defined($pasv) || return 0;
2509 $pasv =~ /\(([0-9,]+)\)/;
2510 @n = split(/,/ , $1);
2511 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2512 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2513 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2517 &open_tempfile(PFILE, ">$_[2]", 1);
2518 while(read(CON, $buf, 1024) > 0) {
2519 &print_tempfile(PFILE, $buf);
2520 $got += length($buf);
2521 &$cbfunc(3, $got) if ($cbfunc);
2523 &close_tempfile(PFILE);
2525 if ($got != $size) {
2526 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2527 else { &error("Download incomplete"); }
2529 &$cbfunc(4) if ($cbfunc);
2531 &ftp_command("", 2, $_[3]) || return 0;
2535 &ftp_command("QUIT", 2, $_[3]) || return 0;
2539 &write_to_http_cache($url, $dest);
2543 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2545 Upload data from a local file to an FTP site. The parameters are :
2547 =item host - FTP server hostname
2549 =item file - File on the FTP server to write to
2551 =item srcfile - File on the Webmin system to upload data from
2553 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2555 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2557 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2559 =item pass - Password for the username above.
2561 =item port - FTP server port number, which defaults to 21 if not set.
2568 if (&is_readonly_mode()) {
2569 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2571 else { &error("FTP connections not allowed in readonly mode"); }
2574 $main::download_timed_out = undef;
2575 local $SIG{ALRM} = \&download_timeout;
2578 # connect to host and login
2579 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2581 if ($main::download_timed_out) {
2582 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2583 else { &error($main::download_timed_out); }
2585 &ftp_command("", 2, $_[3]) || return 0;
2587 # Login as supplied user
2588 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2590 if (int($urv[1]/100) == 3) {
2591 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2595 # Login as anonymous
2596 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2598 if (int($urv[1]/100) == 3) {
2599 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2603 &$cbfunc(1, 0) if ($cbfunc);
2605 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2607 # get the file size and tell the callback
2608 my @st = stat($_[2]);
2610 &$cbfunc(2, $st[7]);
2614 my $pasv = &ftp_command("PASV", 2, $_[3]);
2615 defined($pasv) || return 0;
2616 $pasv =~ /\(([0-9,]+)\)/;
2617 @n = split(/,/ , $1);
2618 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2619 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2624 while(read(PFILE, $buf, 1024) > 0) {
2626 $got += length($buf);
2627 &$cbfunc(3, $got) if ($cbfunc);
2631 if ($got != $st[7]) {
2632 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2633 else { &error("Upload incomplete"); }
2635 &$cbfunc(4) if ($cbfunc);
2638 &ftp_command("", 2, $_[3]) || return 0;
2639 &ftp_command("QUIT", 2, $_[3]) || return 0;
2645 =head2 no_proxy(host)
2647 Checks if some host is on the no proxy list. For internal use by the
2648 http_download and ftp_download functions.
2653 my $ip = &to_ipaddress($_[0]);
2654 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2655 return 1 if ($_[0] =~ /\Q$n\E/ ||
2661 =head2 open_socket(host, port, handle, [&error])
2663 Open a TCP connection to some host and port, using a file handle. The
2666 =item host - Hostname or IP address to connect to.
2668 =item port - TCP port number.
2670 =item handle - A file handle name to use for the connection.
2672 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2677 my ($host, $port, $fh, $err) = @_;
2678 $fh = &callers_package($fh);
2680 if ($gconfig{'debug_what_net'}) {
2681 &webmin_debug_log('TCP', "host=$host port=$port");
2684 # Lookup IP address for the host. Try v4 first, and failing that v6
2686 my $proto = getprotobyname("tcp");
2687 if ($ip = &to_ipaddress($host)) {
2688 # Create IPv4 socket and connection
2689 if (!socket($fh, PF_INET(), SOCK_STREAM, $proto)) {
2690 my $msg = "Failed to create socket : $!";
2691 if ($err) { $$err = $msg; return 0; }
2692 else { &error($msg); }
2694 my $addr = inet_aton($ip);
2695 if ($gconfig{'bind_proxy'}) {
2696 # BIND to outgoing IP
2697 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2698 my $msg = "Failed to bind to source address : $!";
2699 if ($err) { $$err = $msg; return 0; }
2700 else { &error($msg); }
2703 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2704 my $msg = "Failed to connect to $host:$port : $!";
2705 if ($err) { $$err = $msg; return 0; }
2706 else { &error($msg); }
2709 elsif ($ip = &to_ip6address($host)) {
2710 # Create IPv6 socket and connection
2711 if (!&supports_ipv6()) {
2712 $msg = "IPv6 connections are not supported";
2713 if ($err) { $$err = $msg; return 0; }
2714 else { &error($msg); }
2716 if (!socket($fh, Socket6::PF_INET6(), SOCK_STREAM, $proto)) {
2717 my $msg = "Failed to create IPv6 socket : $!";
2718 if ($err) { $$err = $msg; return 0; }
2719 else { &error($msg); }
2721 my $addr = inet_pton(Socket6::AF_INET6(), $ip);
2722 if (!connect($fh, pack_sockaddr_in6($port, $addr))) {
2723 my $msg = "Failed to IPv6 connect to $host:$port : $!";
2724 if ($err) { $$err = $msg; return 0; }
2725 else { &error($msg); }
2730 my $msg = "Failed to lookup IP address for $host";
2731 if ($err) { $$err = $msg; return 0; }
2732 else { &error($msg); }
2736 my $old = select($fh);
2742 =head2 download_timeout
2744 Called when a download times out. For internal use only.
2747 sub download_timeout
2749 $main::download_timed_out = "Download timed out";
2752 =head2 ftp_command(command, expected, [&error], [filehandle])
2754 Send an FTP command, and die if the reply is not what was expected. Mainly
2755 for internal use by the ftp_download and ftp_upload functions.
2760 my ($cmd, $expect, $err, $fh) = @_;
2762 $fh = &callers_package($fh);
2765 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2767 print $fh "$cmd\r\n";
2770 if (!($line = <$fh>)) {
2772 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2773 else { &error("Failed to read reply to $what"); }
2775 $line =~ /^(...)(.)(.*)$/;
2778 foreach my $c (@$expect) {
2779 $found++ if (int($1/100) == $c);
2783 $found++ if (int($1/100) == $_[1]);
2787 if ($err) { $$err = "$what failed : $3"; return undef; }
2788 else { &error("$what failed : $3"); }
2793 # Need to skip extra stuff..
2795 if (!($line = <$fh>)) {
2797 if ($$err) { $$err = "Failed to read reply to $what";
2799 else { &error("Failed to read reply to $what"); }
2801 $line =~ /^(....)(.*)$/; $reply .= $2;
2802 if ($1 eq "$rcode ") { last; }
2806 return wantarray ? ($reply, $rcode) : $reply;
2809 =head2 to_ipaddress(hostname)
2811 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2812 it cannot be resolved.
2817 if (&check_ipaddress($_[0])) {
2818 return $_[0]; # Already in v4 format
2820 elsif (&check_ip6address($_[0])) {
2821 return undef; # A v6 address cannot be converted to v4
2824 my $hn = gethostbyname($_[0]);
2825 return undef if (!$hn);
2826 local @ip = unpack("CCCC", $hn);
2827 return join("." , @ip);
2831 =head2 to_ip6address(hostname)
2833 Converts a hostname to IPv6 address, or returns undef if it cannot be resolved.
2838 if (&check_ip6address($_[0])) {
2839 return $_[0]; # Already in v6 format
2841 elsif (&check_ipaddress($_[0])) {
2842 return undef; # A v4 address cannot be v6
2844 elsif (!&supports_ipv6()) {
2845 return undef; # Cannot lookup
2848 # Perform IPv6 DNS lookup
2850 (undef, undef, undef, $inaddr) =
2851 getaddrinfo($_[0], undef, Socket6::AF_INET6(), SOCK_STREAM);
2852 return undef if (!$inaddr);
2854 (undef, $addr) = unpack_sockaddr_in6($inaddr);
2855 return inet_ntop(Socket6::AF_INET6(), $addr);
2859 =head2 to_hostname(ipv4|ipv6-address)
2861 Reverse-resolves an IPv4 or 6 address to a hostname
2867 if (&check_ip6address($addr) && &supports_ipv6()) {
2868 return gethostbyaddr(inet_pton(Socket6::AF_INET6(), $addr),
2869 Socket6::AF_INET6());
2872 return gethostbyaddr(inet_aton($addr), AF_INET);
2876 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2878 Renders a 4-column table of icons. The useful parameters are :
2880 =item links - An array ref of link destination URLs for the icons.
2882 =item titles - An array ref of titles to appear under the icons.
2884 =item icons - An array ref of URLs for icon images.
2886 =item columns - Number of columns to layout the icons with. Defaults to 4.
2891 &load_theme_library();
2892 if (defined(&theme_icons_table)) {
2893 &theme_icons_table(@_);
2897 my $cols = $_[3] ? $_[3] : 4;
2898 my $per = int(100.0 / $cols);
2899 print "<table class='icons_table' width=100% cellpadding=5>\n";
2900 for(my $i=0; $i<@{$_[0]}; $i++) {
2901 if ($i%$cols == 0) { print "<tr>\n"; }
2902 print "<td width=$per% align=center valign=top>\n";
2903 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2904 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2905 $_[7]->[$i], $_[8]->[$i]);
2907 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2909 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2910 print "</tr>\n" if ($need_tr);
2914 =head2 replace_file_line(file, line, [newline]*)
2916 Replaces one line in some file with 0 or more new lines. The parameters are :
2918 =item file - Full path to some file, like /etc/hosts.
2920 =item line - Line number to replace, starting from 0.
2922 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2925 sub replace_file_line
2928 my $realfile = &translate_filename($_[0]);
2929 open(FILE, $realfile);
2932 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2933 else { splice(@lines, $_[1], 1); }
2934 &open_tempfile(FILE, ">$realfile");
2935 &print_tempfile(FILE, @lines);
2936 &close_tempfile(FILE);
2939 =head2 read_file_lines(file, [readonly])
2941 Returns a reference to an array containing the lines from some file. This
2942 array can be modified, and will be written out when flush_file_lines()
2943 is called. The parameters are :
2945 =item file - Full path to the file to read.
2947 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2951 $lref = read_file_lines("/etc/hosts");
2952 push(@$lref, "127.0.0.1 localhost");
2953 flush_file_lines("/etc/hosts");
2959 my ($package, $filename, $line) = caller;
2960 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2962 my $realfile = &translate_filename($_[0]);
2963 if (!$main::file_cache{$realfile}) {
2966 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2967 open(READFILE, $realfile);
2970 $eol = /\r\n$/ ? "\r\n" : "\n";
2976 $main::file_cache{$realfile} = \@lines;
2977 $main::file_cache_noflush{$realfile} = $_[1];
2978 $main::file_cache_eol{$realfile} = $eol || "\n";
2981 # Make read-write if currently readonly
2983 $main::file_cache_noflush{$realfile} = 0;
2986 return $main::file_cache{$realfile};
2989 =head2 flush_file_lines([file], [eol])
2991 Write out to a file previously read by read_file_lines to disk (except
2992 for those marked readonly). The parameters are :
2994 =item file - The file to flush out.
2996 =item eof - End-of-line character for each line. Defaults to \n.
2999 sub flush_file_lines
3003 local $trans = &translate_filename($_[0]);
3004 $main::file_cache{$trans} ||
3005 &error("flush_file_lines called on non-loaded file $trans");
3006 push(@files, $trans);
3009 @files = ( keys %main::file_cache );
3011 foreach my $f (@files) {
3012 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
3013 if (!$main::file_cache_noflush{$f}) {
3014 no warnings; # XXX Bareword file handles should go away
3015 &open_tempfile(FLUSHFILE, ">$f");
3016 foreach my $line (@{$main::file_cache{$f}}) {
3017 (print FLUSHFILE $line,$eol) ||
3018 &error(&text("efilewrite", $f, $!));
3020 &close_tempfile(FLUSHFILE);
3022 delete($main::file_cache{$f});
3023 delete($main::file_cache_noflush{$f});
3027 =head2 unflush_file_lines(file)
3029 Clear the internal cache of some given file, previously read by read_file_lines.
3032 sub unflush_file_lines
3034 my $realfile = &translate_filename($_[0]);
3035 delete($main::file_cache{$realfile});
3036 delete($main::file_cache_noflush{$realfile});
3039 =head2 unix_user_input(fieldname, user, [form])
3041 Returns HTML for an input to select a Unix user. By default this is a text
3042 box with a user popup button next to it.
3047 if (defined(&theme_unix_user_input)) {
3048 return &theme_unix_user_input(@_);
3050 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
3051 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
3054 =head2 unix_group_input(fieldname, user, [form])
3056 Returns HTML for an input to select a Unix group. By default this is a text
3057 box with a group popup button next to it.
3060 sub unix_group_input
3062 if (defined(&theme_unix_group_input)) {
3063 return &theme_unix_group_input(@_);
3065 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
3066 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
3069 =head2 hlink(text, page, [module], [width], [height])
3071 Returns HTML for a link that when clicked on pops up a window for a Webmin
3072 help page. The parameters are :
3074 =item text - Text for the link.
3076 =item page - Help page code, such as 'intro'.
3078 =item module - Module the help page is in. Defaults to the current module.
3080 =item width - Width of the help popup window. Defaults to 600 pixels.
3082 =item height - Height of the help popup window. Defaults to 400 pixels.
3084 The actual help pages are in each module's help sub-directory, in files with
3090 if (defined(&theme_hlink)) {
3091 return &theme_hlink(@_);
3093 my $mod = $_[2] ? $_[2] : &get_module_name();
3094 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
3095 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
3096 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>";
3099 =head2 user_chooser_button(field, multiple, [form])
3101 Returns HTML for a javascript button for choosing a Unix user or users.
3102 The parameters are :
3104 =item field - Name of the HTML field to place the username into.
3106 =item multiple - Set to 1 if multiple users can be selected.
3108 =item form - Index of the form on the page.
3111 sub user_chooser_button
3113 return undef if (!&supports_users());
3114 return &theme_user_chooser_button(@_)
3115 if (defined(&theme_user_chooser_button));
3116 my $form = defined($_[2]) ? $_[2] : 0;
3117 my $w = $_[1] ? 500 : 300;
3119 if ($_[1] && $gconfig{'db_sizeusers'}) {
3120 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3122 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3123 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3125 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";
3128 =head2 group_chooser_button(field, multiple, [form])
3130 Returns HTML for a javascript button for choosing a Unix group or groups
3131 The parameters are :
3133 =item field - Name of the HTML field to place the group name into.
3135 =item multiple - Set to 1 if multiple groups can be selected.
3137 =item form - Index of the form on the page.
3140 sub group_chooser_button
3142 return undef if (!&supports_users());
3143 return &theme_group_chooser_button(@_)
3144 if (defined(&theme_group_chooser_button));
3145 my $form = defined($_[2]) ? $_[2] : 0;
3146 my $w = $_[1] ? 500 : 300;
3148 if ($_[1] && $gconfig{'db_sizeusers'}) {
3149 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3151 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3152 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3154 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";
3157 =head2 foreign_check(module, [api-only])
3159 Checks if some other module exists and is supported on this OS. The parameters
3162 =item module - Name of the module to check.
3164 =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.
3169 my ($mod, $api) = @_;
3171 my $mdir = &module_root_directory($mod);
3172 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
3173 return &check_os_support(\%minfo, undef, undef, $api);
3176 =head2 foreign_exists(module)
3178 Checks if some other module exists. The module parameter is the short module
3184 my $mdir = &module_root_directory($_[0]);
3185 return -r "$mdir/module.info";
3188 =head2 foreign_available(module)
3190 Returns 1 if some module is installed, and acessible to the current user. The
3191 module parameter is the module directory name.
3194 sub foreign_available
3196 return 0 if (!&foreign_check($_[0]) &&
3197 !$gconfig{'available_even_if_no_support'});
3198 my %foreign_module_info = &get_module_info($_[0]);
3200 # Check list of allowed modules
3202 &read_acl(\%acl, undef, [ $base_remote_user ]);
3203 return 0 if (!$acl{$base_remote_user,$_[0]} &&
3204 !$acl{$base_remote_user,'*'});
3206 # Check for usermod restrictions
3207 my @usermods = &list_usermods();
3208 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
3210 if (&get_product_name() eq "webmin") {
3211 # Check if the user has any RBAC privileges in this module
3212 if (&supports_rbac($_[0]) &&
3213 &use_rbac_module_acl(undef, $_[0])) {
3214 # RBAC is enabled for this user and module - check if he
3216 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
3217 return 0 if (!$rbacs);
3219 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
3220 # If denying access to modules not specifically allowed by
3221 # RBAC, then prevent access
3226 # Check readonly support
3227 if (&is_readonly_mode()) {
3228 return 0 if (!$foreign_module_info{'readonly'});
3231 # Check if theme vetos
3232 if (defined(&theme_foreign_available)) {
3233 return 0 if (!&theme_foreign_available($_[0]));
3236 # Check if licence module vetos
3237 if ($main::licence_module) {
3238 return 0 if (!&foreign_call($main::licence_module,
3239 "check_module_licence", $_[0]));
3245 =head2 foreign_require(module, [file], [package])
3247 Brings in functions from another module, and places them in the Perl namespace
3248 with the same name as the module. The parameters are :
3250 =item module - The source module's directory name, like sendmail.
3252 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
3254 =item package - Perl package to place the module's functions and global variables in.
3256 If the original module name contains dashes, they will be replaced with _ in
3262 my ($mod, $file, $pkg) = @_;
3263 $pkg ||= $mod || "global";
3264 $pkg =~ s/[^A-Za-z0-9]/_/g;
3267 push(@files, $file);
3271 my %minfo = &get_module_info($mod);
3272 if ($minfo{'library'}) {
3273 @files = split(/\s+/, $minfo{'library'});
3276 @files = ( $mod."-lib.pl" );
3279 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3280 return 1 if (!@files);
3281 foreach my $f (@files) {
3282 $main::done_foreign_require{$pkg,$f}++;
3285 my $mdir = &module_root_directory($mod);
3286 @INC = &unique($mdir, @INC);
3287 -d $mdir || &error("Module $mod does not exist");
3288 if (!&get_module_name() && $mod) {
3291 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3292 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3293 my $code = "package $pkg; ".
3294 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3295 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3296 foreach my $f (@files) {
3297 $code .= "do '$mdir/$f' || die \$@; ";
3300 if (defined($old_fmn)) {
3301 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3304 delete($ENV{'FOREIGN_MODULE_NAME'});
3306 if (defined($old_frd)) {
3307 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3310 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3313 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3317 =head2 foreign_call(module, function, [arg]*)
3319 Call a function in another module. The module parameter is the target module
3320 directory name, function is the perl sub to call, and the remaining parameters
3321 are the arguments. However, unless you need to call a function whose name
3322 is dynamic, it is better to use Perl's cross-module function call syntax
3323 like module::function(args).
3328 my $pkg = $_[0] || "global";
3329 $pkg =~ s/[^A-Za-z0-9]/_/g;
3330 my @args = @_[2 .. @_-1];
3331 $main::foreign_args = \@args;
3332 my @rv = eval <<EOF;
3334 &$_[1](\@{\$main::foreign_args});
3336 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3337 return wantarray ? @rv : $rv[0];
3340 =head2 foreign_config(module, [user-config])
3342 Get the configuration from another module, and return it as a hash. If the
3343 user-config parameter is set to 1, returns the Usermin user-level preferences
3344 for the current user instead.
3349 my ($mod, $uc) = @_;
3352 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3353 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3354 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3357 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3362 =head2 foreign_installed(module, mode)
3364 Checks if the server for some module is installed, and possibly also checks
3365 if the module has been configured by Webmin.
3366 For mode 1, returns 2 if the server is installed and configured for use by
3367 Webmin, 1 if installed but not configured, or 0 otherwise.
3368 For mode 0, returns 1 if installed, 0 if not.
3369 If the module does not provide an install_check.pl script, assumes that
3370 the server is installed.
3373 sub foreign_installed
3375 my ($mod, $configured) = @_;
3376 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3378 return $main::foreign_installed_cache{$mod,$configured};
3382 if (!&foreign_check($mod)) {
3387 my $mdir = &module_root_directory($mod);
3388 if (!-r "$mdir/install_check.pl") {
3389 # Not known, assume OK
3390 $rv = $configured ? 2 : 1;
3393 # Call function to check
3394 &foreign_require($mod, "install_check.pl");
3395 $rv = &foreign_call($mod, "is_installed", $configured);
3398 $main::foreign_installed_cache{$mod,$configured} = $rv;
3403 =head2 foreign_defined(module, function)
3405 Returns 1 if some function is defined in another module. In general, it is
3406 simpler to use the syntax &defined(module::function) instead.
3412 $pkg =~ s/[^A-Za-z0-9]/_/g;
3413 my $func = "${pkg}::$_[1]";
3414 return defined(&$func);
3417 =head2 get_system_hostname([short], [skip-file])
3419 Returns the hostname of this system. If the short parameter is set to 1,
3420 then the domain name is not prepended - otherwise, Webmin will attempt to get
3421 the fully qualified hostname, like foo.example.com.
3424 sub get_system_hostname
3427 my $skipfile = $_[1];
3428 if (!$main::get_system_hostname[$m]) {
3429 if ($gconfig{'os_type'} ne 'windows') {
3430 # Try some common Linux hostname files first
3433 # Never get from file
3435 elsif ($gconfig{'os_type'} eq 'redhat-linux') {
3437 &read_env_file("/etc/sysconfig/network", \%nc);
3438 if ($nc{'HOSTNAME'}) {
3439 $fromfile = $nc{'HOSTNAME'};
3442 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3443 my $hn = &read_file_contents("/etc/hostname");
3449 elsif ($gconfig{'os_type'} eq 'open-linux') {
3450 my $hn = &read_file_contents("/etc/HOSTNAME");
3456 elsif ($gconfig{'os_type'} eq 'solaris') {
3457 my $hn = &read_file_contents("/etc/nodename");
3464 # If we found a hostname in a file, use it
3465 if ($fromfile && ($m || $fromfile =~ /\./)) {
3467 $fromfile =~ s/\..*$//;
3469 $main::get_system_hostname[$m] = $fromfile;
3473 # Can use hostname command on Unix
3474 &execute_command("hostname", undef,
3475 \$main::get_system_hostname[$m], undef, 0, 1);
3476 chop($main::get_system_hostname[$m]);
3478 eval "use Sys::Hostname";
3480 $main::get_system_hostname[$m] = eval "hostname()";
3482 if ($@ || !$main::get_system_hostname[$m]) {
3483 $main::get_system_hostname[$m] = "UNKNOWN";
3486 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3487 $gconfig{'os_type'} =~ /linux$/ &&
3488 !$gconfig{'no_hostname_f'} && !$_[0]) {
3489 # Try with -f flag to get fully qualified name
3491 my $ex = &execute_command("hostname -f", undef, \$flag,
3494 if ($ex || $flag eq "") {
3495 # -f not supported! We have probably set the
3496 # hostname to just '-f'. Fix the problem
3499 &execute_command("hostname ".
3500 quotemeta($main::get_system_hostname[$m]),
3501 undef, undef, undef, 0, 1);
3505 $main::get_system_hostname[$m] = $flag;
3510 # On Windows, try computername environment variable
3511 return $ENV{'computername'} if ($ENV{'computername'});
3512 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3514 # Fall back to net name command
3515 my $out = `net name 2>&1`;
3516 if ($out =~ /\-+\r?\n(\S+)/) {
3517 $main::get_system_hostname[$m] = $1;
3520 $main::get_system_hostname[$m] = "windows";
3524 return $main::get_system_hostname[$m];
3527 =head2 get_webmin_version
3529 Returns the version of Webmin currently being run, such as 1.450.
3532 sub get_webmin_version
3534 if (!$get_webmin_version) {
3535 open(VERSION, "$root_directory/version") || return 0;
3536 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3539 return $get_webmin_version;
3542 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3544 Returns a hash containing access control options for the given user and module.
3545 By default the current username and module name are used. If the no-rbac flag
3546 is given, the permissions will not be updated based on the user's RBAC role
3547 (as seen on Solaris). If the no-default flag is given, default permissions for
3548 the module will not be included.
3553 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3554 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3555 my $mdir = &module_root_directory($m);
3558 # Read default ACL first, to be overridden by per-user settings
3559 &read_file_cached("$mdir/defaultacl", \%rv);
3561 # If this isn't a master admin user, apply the negative permissions
3562 # so that he doesn't un-expectedly gain access to new features
3564 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3565 if ($gaccess{'negative'}) {
3566 &read_file_cached("$mdir/negativeacl", \%rv);
3570 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3571 # RBAC overrides exist for this user in this module
3572 my $rbac = &get_rbac_module_acl(
3573 defined($_[0]) ? $_[0] : $remote_user, $m);
3574 foreach my $r (keys %$rbac) {
3575 $rv{$r} = $rbac->{$r};
3578 elsif ($gconfig{"risk_$u"} && $m) {
3579 # ACL is defined by user's risk level
3580 my $rf = $gconfig{"risk_$u"}.'.risk';
3581 &read_file_cached("$mdir/$rf", \%rv);
3583 my $sf = $gconfig{"skill_$u"}.'.skill';
3584 &read_file_cached("$mdir/$sf", \%rv);
3587 # Use normal Webmin ACL, if a user is set
3588 my $userdb = &get_userdb_string();
3590 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3591 # Look for this user in the user/group DB, if one is defined
3592 # and if the user might be in the DB
3593 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3594 ref($dbh) || &error(&text('euserdbacl', $dbh));
3595 if ($proto eq "mysql" || $proto eq "postgresql") {
3596 # Find the user in the SQL DB
3597 my $cmd = $dbh->prepare(
3598 "select id from webmin_user where name = ?");
3599 $cmd && $cmd->execute($u) ||
3600 &error(&text('euserdbacl', $dbh->errstr));
3601 my ($id) = $cmd->fetchrow();
3602 $foundindb = 1 if (defined($id));
3605 # Fetch ACLs with SQL
3607 my $cmd = $dbh->prepare(
3608 "select attr,value from webmin_user_acl ".
3609 "where id = ? and module = ?");
3610 $cmd && $cmd->execute($id, $m) ||
3611 &error(&text('euserdbacl', $dbh->errstr));
3612 while(my ($a, $v) = $cmd->fetchrow()) {
3618 elsif ($proto eq "ldap") {
3620 my $rv = $dbh->search(
3622 filter => '(&(cn='.$u.')(objectClass='.
3623 $args->{'userclass'}.'))',
3625 if (!$rv || $rv->code) {
3626 &error(&text('euserdbacl',
3627 $rv ? $rv->error : "Unknown error"));
3629 my ($user) = $rv->all_entries;
3631 # Find ACL sub-object for the module
3632 my $ldapm = $m || "global";
3634 my $rv = $dbh->search(
3635 base => $user->dn(),
3636 filter => '(cn='.$ldapm.')',
3638 if (!$rv || $rv->code) {
3639 &error(&text('euserdbacl',
3640 $rv ? $rv->error : "Unknown error"));
3642 my ($acl) = $rv->all_entries;
3644 foreach my $av ($acl->get_value(
3645 'webminAclEntry')) {
3646 my ($a, $v) = split(/=/, $av,2);
3652 &disconnect_userdb($userdb, $dbh);
3656 # Read from local files
3657 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3658 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3660 "$config_directory/$m/$remote_user.acl",\%rv);
3664 if ($tconfig{'preload_functions'}) {
3665 &load_theme_library();
3667 if (defined(&theme_get_module_acl)) {
3668 %rv = &theme_get_module_acl($u, $m, \%rv);
3673 =head2 get_group_module_acl(group, [module], [no-default])
3675 Returns the ACL for a Webmin group, in an optional module (which defaults to
3676 the current module).
3679 sub get_group_module_acl
3682 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3683 my $mdir = &module_root_directory($m);
3686 &read_file_cached("$mdir/defaultacl", \%rv);
3689 my $userdb = &get_userdb_string();
3692 # Look for this group in the user/group DB
3693 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3694 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3695 if ($proto eq "mysql" || $proto eq "postgresql") {
3696 # Find the group in the SQL DB
3697 my $cmd = $dbh->prepare(
3698 "select id from webmin_group where name = ?");
3699 $cmd && $cmd->execute($g) ||
3700 &error(&text('egroupdbacl', $dbh->errstr));
3701 my ($id) = $cmd->fetchrow();
3702 $foundindb = 1 if (defined($id));
3705 # Fetch ACLs with SQL
3707 my $cmd = $dbh->prepare(
3708 "select attr,value from webmin_group_acl ".
3709 "where id = ? and module = ?");
3710 $cmd && $cmd->execute($id, $m) ||
3711 &error(&text('egroupdbacl', $dbh->errstr));
3712 while(my ($a, $v) = $cmd->fetchrow()) {
3718 elsif ($proto eq "ldap") {
3719 # Find group in LDAP
3720 my $rv = $dbh->search(
3722 filter => '(&(cn='.$g.')(objectClass='.
3723 $args->{'groupclass'}.'))',
3725 if (!$rv || $rv->code) {
3726 &error(&text('egroupdbacl',
3727 $rv ? $rv->error : "Unknown error"));
3729 my ($group) = $rv->all_entries;
3731 # Find ACL sub-object for the module
3732 my $ldapm = $m || "global";
3734 my $rv = $dbh->search(
3735 base => $group->dn(),
3736 filter => '(cn='.$ldapm.')',
3738 if (!$rv || $rv->code) {
3739 &error(&text('egroupdbacl',
3740 $rv ? $rv->error : "Unknown error"));
3742 my ($acl) = $rv->all_entries;
3744 foreach my $av ($acl->get_value(
3745 'webminAclEntry')) {
3746 my ($a, $v) = split(/=/, $av, 2);
3752 &disconnect_userdb($userdb, $dbh);
3755 # Read from local files
3756 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3758 if (defined(&theme_get_module_acl)) {
3759 %rv = &theme_get_module_acl($g, $m, \%rv);
3764 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3766 Updates the acl hash for some user and module. The parameters are :
3768 =item acl - Hash reference for the new access control options, or undef to clear
3770 =item user - User to update, defaulting to the current user.
3772 =item module - Module to update, defaulting to the caller.
3774 =item never-update-group - Never update the user's group's ACL
3779 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3780 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3781 if (!$_[3] && &foreign_check("acl")) {
3782 # Check if this user is a member of a group, and if he gets the
3783 # module from a group. If so, update its ACL as well
3784 &foreign_require("acl", "acl-lib.pl");
3786 foreach my $g (&acl::list_groups()) {
3787 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3788 &indexof($m, @{$g->{'modules'}}) >= 0) {
3794 &save_group_module_acl($_[0], $group->{'name'}, $m);
3798 my $userdb = &get_userdb_string();
3800 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3801 # Look for this user in the user/group DB
3802 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3803 ref($dbh) || &error(&text('euserdbacl', $dbh));
3804 if ($proto eq "mysql" || $proto eq "postgresql") {
3805 # Find the user in the SQL DB
3806 my $cmd = $dbh->prepare(
3807 "select id from webmin_user where name = ?");
3808 $cmd && $cmd->execute($u) ||
3809 &error(&text('euserdbacl2', $dbh->errstr));
3810 my ($id) = $cmd->fetchrow();
3811 $foundindb = 1 if (defined($id));
3814 # Replace ACLs for user
3816 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3817 "where id = ? and module = ?");
3818 $cmd && $cmd->execute($id, $m) ||
3819 &error(&text('euserdbacl', $dbh->errstr));
3822 my $cmd = $dbh->prepare(
3823 "insert into webmin_user_acl ".
3824 "(id,module,attr,value) values (?,?,?,?)");
3825 $cmd || &error(&text('euserdbacl2',
3827 foreach my $a (keys %{$_[0]}) {
3828 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3829 &error(&text('euserdbacl2',
3836 elsif ($proto eq "ldap") {
3837 # Find the user in LDAP
3838 my $rv = $dbh->search(
3840 filter => '(&(cn='.$u.')(objectClass='.
3841 $args->{'userclass'}.'))',
3843 if (!$rv || $rv->code) {
3844 &error(&text('euserdbacl',
3845 $rv ? $rv->error : "Unknown error"));
3847 my ($user) = $rv->all_entries;
3850 # Find the ACL sub-object for the module
3852 my $ldapm = $m || "global";
3853 my $rv = $dbh->search(
3854 base => $user->dn(),
3855 filter => '(cn='.$ldapm.')',
3857 if (!$rv || $rv->code) {
3858 &error(&text('euserdbacl',
3859 $rv ? $rv->error : "Unknown error"));
3861 my ($acl) = $rv->all_entries;
3864 foreach my $a (keys %{$_[0]}) {
3865 push(@al, $a."=".$_[0]->{$a});
3869 $rv = $dbh->modify($acl->dn(),
3870 replace => { "webminAclEntry", \@al });
3874 my @attrs = ( "cn", $ldapm,
3875 "objectClass", "webminAcl",
3876 "webminAclEntry", \@al );
3877 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3880 if (!$rv || $rv->code) {
3881 &error(&text('euserdbacl2',
3882 $rv ? $rv->error : "Unknown error"));
3886 &disconnect_userdb($userdb, $dbh);
3890 # Save ACL to local file
3891 if (!-d "$config_directory/$m") {
3892 mkdir("$config_directory/$m", 0755);
3895 &write_file("$config_directory/$m/$u.acl", $_[0]);
3898 &unlink_file("$config_directory/$m/$u.acl");
3903 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3905 Updates the acl hash for some group and module. The parameters are :
3907 =item acl - Hash reference for the new access control options.
3909 =item group - Group name to update.
3911 =item module - Module to update, defaulting to the caller.
3913 =item never-update-group - Never update the parent group's ACL
3916 sub save_group_module_acl
3919 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3920 if (!$_[3] && &foreign_check("acl")) {
3921 # Check if this group is a member of a group, and if it gets the
3922 # module from a group. If so, update the parent ACL as well
3923 &foreign_require("acl", "acl-lib.pl");
3925 foreach my $pg (&acl::list_groups()) {
3926 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3927 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3933 &save_group_module_acl($_[0], $group->{'name'}, $m);
3937 my $userdb = &get_userdb_string();
3940 # Look for this group in the user/group DB
3941 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3942 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3943 if ($proto eq "mysql" || $proto eq "postgresql") {
3944 # Find the group in the SQL DB
3945 my $cmd = $dbh->prepare(
3946 "select id from webmin_group where name = ?");
3947 $cmd && $cmd->execute($g) ||
3948 &error(&text('egroupdbacl2', $dbh->errstr));
3949 my ($id) = $cmd->fetchrow();
3950 $foundindb = 1 if (defined($id));
3953 # Replace ACLs for group
3955 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3956 "where id = ? and module = ?");
3957 $cmd && $cmd->execute($id, $m) ||
3958 &error(&text('egroupdbacl', $dbh->errstr));
3961 my $cmd = $dbh->prepare(
3962 "insert into webmin_group_acl ".
3963 "(id,module,attr,value) values (?,?,?,?)");
3964 $cmd || &error(&text('egroupdbacl2',
3966 foreach my $a (keys %{$_[0]}) {
3967 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3968 &error(&text('egroupdbacl2',
3975 elsif ($proto eq "ldap") {
3976 # Find the group in LDAP
3977 my $rv = $dbh->search(
3979 filter => '(&(cn='.$g.')(objectClass='.
3980 $args->{'groupclass'}.'))',
3982 if (!$rv || $rv->code) {
3983 &error(&text('egroupdbacl',
3984 $rv ? $rv->error : "Unknown error"));
3986 my ($group) = $rv->all_entries;
3988 my $ldapm = $m || "global";
3990 # Find the ACL sub-object for the module
3992 my $rv = $dbh->search(
3993 base => $group->dn(),
3994 filter => '(cn='.$ldapm.')',
3996 if (!$rv || $rv->code) {
3997 &error(&text('egroupdbacl',
3998 $rv ? $rv->error : "Unknown error"));
4000 my ($acl) = $rv->all_entries;
4003 foreach my $a (keys %{$_[0]}) {
4004 push(@al, $a."=".$_[0]->{$a});
4008 $rv = $dbh->modify($acl->dn(),
4009 replace => { "webminAclEntry", \@al });
4013 my @attrs = ( "cn", $ldapm,
4014 "objectClass", "webminAcl",
4015 "webminAclEntry", \@al );
4016 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
4019 if (!$rv || $rv->code) {
4020 &error(&text('egroupdbacl2',
4021 $rv ? $rv->error : "Unknown error"));
4025 &disconnect_userdb($userdb, $dbh);
4029 # Save ACL to local file
4030 if (!-d "$config_directory/$m") {
4031 mkdir("$config_directory/$m", 0755);
4034 &write_file("$config_directory/$m/$g.gacl", $_[0]);
4037 &unlink_file("$config_directory/$m/$g.gacl");
4044 This function must be called by all Webmin CGI scripts, either directly or
4045 indirectly via a per-module lib.pl file. It performs a number of initialization
4046 and housekeeping tasks, such as working out the module name, checking that the
4047 current user has access to the module, and populating global variables. Some
4048 of the variables set include :
4050 =item $config_directory - Base Webmin config directory, typically /etc/webmin
4052 =item $var_directory - Base logs directory, typically /var/webmin
4054 =item %config - Per-module configuration.
4056 =item %gconfig - Global configuration.
4058 =item $scriptname - Base name of the current perl script.
4060 =item $module_name - The name of the current module.
4062 =item $module_config_directory - The config directory for this module.
4064 =item $module_config_file - The config file for this module.
4066 =item $module_root_directory - This module's code directory.
4068 =item $webmin_logfile - The detailed logfile for webmin.
4070 =item $remote_user - The actual username used to login to webmin.
4072 =item $base_remote_user - The username whose permissions are in effect.
4074 =item $current_theme - The theme currently in use.
4076 =item $root_directory - The first root directory of this webmin install.
4078 =item @root_directories - All root directories for this webmin install.
4083 # Record first process ID that called this, so we know when it exited to clean
4085 $main::initial_process_id ||= $$;
4087 # Configuration and spool directories
4088 if (!defined($ENV{'WEBMIN_CONFIG'})) {
4089 die "WEBMIN_CONFIG not set";
4091 $config_directory = $ENV{'WEBMIN_CONFIG'};
4092 if (!defined($ENV{'WEBMIN_VAR'})) {
4093 open(VARPATH, "$config_directory/var-path");
4094 chop($var_directory = <VARPATH>);
4098 $var_directory = $ENV{'WEBMIN_VAR'};
4100 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
4101 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
4103 if ($ENV{'SESSION_ID'}) {
4104 # Hide this variable from called programs, but keep it for internal use
4105 $main::session_id = $ENV{'SESSION_ID'};
4106 delete($ENV{'SESSION_ID'});
4108 if ($ENV{'REMOTE_PASS'}) {
4109 # Hide the password too
4110 $main::remote_pass = $ENV{'REMOTE_PASS'};
4111 delete($ENV{'REMOTE_PASS'});
4114 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
4115 # Looks like we are running setuid, but the real UID hasn't been set.
4116 # Do so now, so that executed programs don't get confused
4121 # Read the webmin global config file. This contains the OS type and version,
4122 # OS specific configuration and global options such as proxy servers
4123 $config_file = "$config_directory/config";
4125 &read_file_cached($config_file, \%gconfig);
4126 $gconfig{'webprefix'} = '' if (!exists($gconfig{'webprefix'}));
4127 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
4128 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
4130 # Work out of this is a web, command line or cron job
4131 if (!$main::webmin_script_type) {
4132 if ($ENV{'SCRIPT_NAME'}) {
4134 $main::webmin_script_type = 'web';
4137 # Cron jobs have no TTY
4138 if ($gconfig{'os_type'} eq 'windows' ||
4139 open(DEVTTY, ">/dev/tty")) {
4140 $main::webmin_script_type = 'cmd';
4144 $main::webmin_script_type = 'cron';
4149 # If debugging is enabled, open the debug log
4150 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
4151 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
4152 if ($gconfig{'debug_size'}) {
4153 my @st = stat($dlog);
4154 if ($st[7] > $gconfig{'debug_size'}) {
4155 rename($dlog, $dlog.".0");
4158 open(main::DEBUGLOG, ">>$dlog");
4159 $main::opened_debug_log = 1;
4161 if ($gconfig{'debug_what_start'}) {
4162 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4163 $main::debug_log_start_time = time();
4164 &webmin_debug_log("START", "script=$script_name");
4165 $main::debug_log_start_module = $module_name;
4169 # Set PATH and LD_LIBRARY_PATH
4170 if ($gconfig{'path'}) {
4171 if ($gconfig{'syspath'}) {
4173 $ENV{'PATH'} = $gconfig{'path'};
4177 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
4180 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
4182 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
4183 if ($gconfig{'http_proxy'}) {
4184 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
4186 if ($gconfig{'ftp_proxy'}) {
4187 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
4189 if ($gconfig{'noproxy'}) {
4190 $ENV{'no_proxy'} = $gconfig{'noproxy'};
4193 # Find all root directories
4195 if (&get_miniserv_config(\%miniserv)) {
4196 @root_directories = ( $miniserv{'root'} );
4197 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
4198 push(@root_directories, $miniserv{"extraroot_$i"});
4202 # Work out which module we are in, and read the per-module config file
4203 $0 =~ s/\\/\//g; # Force consistent path on Windows
4204 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
4205 # In a foreign call - use the module name given
4206 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
4207 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
4208 @root_directories = ( $root_directory ) if (!@root_directories);
4210 elsif ($ENV{'SCRIPT_NAME'}) {
4211 my $sn = $ENV{'SCRIPT_NAME'};
4212 $sn =~ s/^$gconfig{'webprefix'}//
4213 if (!$gconfig{'webprefixnoredir'});
4214 if ($sn =~ /^\/([^\/]+)\//) {
4215 # Get module name from CGI path
4218 if ($ENV{'SERVER_ROOT'}) {
4219 $root_directory = $ENV{'SERVER_ROOT'};
4221 elsif ($ENV{'SCRIPT_FILENAME'}) {
4222 $root_directory = $ENV{'SCRIPT_FILENAME'};
4223 $root_directory =~ s/$sn$//;
4225 @root_directories = ( $root_directory ) if (!@root_directories);
4228 # Get root directory from miniserv.conf, and deduce module name from $0
4229 $root_directory = $root_directories[0];
4231 foreach my $r (@root_directories) {
4232 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
4233 # Under a module directory
4238 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
4244 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
4247 # Set the umask based on config
4248 if ($gconfig{'umask'} && !$main::umask_already++) {
4249 umask(oct($gconfig{'umask'}));
4252 # If this is a cron job or other background task, set the nice level
4253 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4255 if ($gconfig{'nice'}) {
4256 eval 'POSIX::nice($gconfig{\'nice\'});';
4259 # Set IO scheduling class and priority
4260 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4262 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4263 if ($gconfig{'sclass'} ne '');
4264 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4265 if ($gconfig{'sprio'} ne '');
4267 &execute_command("$cmd >/dev/null 2>&1");
4270 $main::nice_already++;
4273 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4274 $base_remote_user = $u;
4275 $remote_user = $ENV{'REMOTE_USER'};
4277 # Work out if user is definitely in the DB, and if so get his attrs
4278 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4279 %remote_user_attrs = ( );
4280 if ($remote_user_proto) {
4281 my $userdb = &get_userdb_string();
4282 my ($dbh, $proto, $prefix, $args) =
4283 $userdb ? &connect_userdb($userdb) : ( );
4285 if ($proto eq "mysql" || $proto eq "postgresql") {
4286 # Read attrs from SQL
4287 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
4288 if ($cmd && $cmd->execute($base_remote_user)) {
4289 while(my ($attr, $value) = $cmd->fetchrow()) {
4290 $remote_user_attrs{$attr} = $value;
4295 elsif ($proto eq "ldap") {
4296 # Read attrs from LDAP
4297 my $rv = $dbh->search(
4299 filter => '(&(cn='.$base_remote_user.')'.
4301 $args->{'userclass'}.'))',
4303 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4305 foreach $la ($u->get_value('webminAttr')) {
4306 my ($attr, $value) = split(/=/, $la, 2);
4307 $remote_user_attrs{$attr} = $value;
4311 &disconnect_userdb($userdb, $dbh);
4316 # Find and load the configuration file for this module
4317 my (@ruinfo, $rgroup);
4318 $module_config_directory = "$config_directory/$module_name";
4319 if (&get_product_name() eq "usermin" &&
4320 -r "$module_config_directory/config.$remote_user") {
4322 $module_config_file = "$module_config_directory/config.$remote_user";
4324 elsif (&get_product_name() eq "usermin" &&
4325 (@ruinfo = getpwnam($remote_user)) &&
4326 ($rgroup = getgrgid($ruinfo[3])) &&
4327 -r "$module_config_directory/config.\@$rgroup") {
4328 # Based on group name
4329 $module_config_file = "$module_config_directory/config.\@$rgroup";
4333 $module_config_file = "$module_config_directory/config";
4336 &read_file_cached($module_config_file, \%config);
4338 # Fix up windows-specific substitutions in values
4339 foreach my $k (keys %config) {
4340 if ($config{$k} =~ /\$\{systemroot\}/) {
4341 my $root = &get_windows_root();
4342 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4347 # Record the initial module
4348 $main::initial_module_name ||= $module_name;
4350 # Set some useful variables
4352 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4353 $gconfig{'mobile_theme'} :
4354 defined($remote_user_attrs{'theme'}) ?
4355 $remote_user_attrs{'theme'} :
4356 defined($gconfig{'theme_'.$remote_user}) ?
4357 $gconfig{'theme_'.$remote_user} :
4358 defined($gconfig{'theme_'.$base_remote_user}) ?
4359 $gconfig{'theme_'.$base_remote_user} :
4361 @current_themes = split(/\s+/, $current_themes);
4362 $current_theme = $current_themes[0];
4363 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4364 $theme_root_directory = $theme_root_directories[0];
4365 @theme_configs = ( );
4366 foreach my $troot (@theme_root_directories) {
4368 &read_file_cached("$troot/config", \%onetconfig);
4369 &read_file_cached("$troot/config", \%tconfig);
4370 push(@theme_configs, \%onetconfig);
4372 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4373 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4375 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4376 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4378 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4379 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4380 if ($tconfig{'preload_functions'}) {
4381 # Force load of theme functions right now, if requested
4382 &load_theme_library();
4384 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4385 # Load the theme's Webmin:: package classes
4386 do "$theme_root_directory/$tconfig{'oofunctions'}";
4391 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4392 : "$var_directory/webmin.log";
4394 # Load language strings into %text
4395 my @langs = &list_languages();
4397 if ($gconfig{'acceptlang'}) {
4398 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4399 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4401 $accepted_lang = $al->{'lang'};
4406 $current_lang = $force_lang ? $force_lang :
4407 $accepted_lang ? $accepted_lang :
4408 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4409 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4410 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4411 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4412 foreach my $l (@langs) {
4413 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4415 @lang_order_list = &unique($default_lang,
4416 split(/:/, $current_lang_info->{'fallback'}),
4418 %text = &load_language($module_name);
4419 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4421 # Get the %module_info for this module
4423 my ($mi) = grep { $_->{'dir'} eq $module_name }
4424 &get_all_module_infos(2);
4425 %module_info = %$mi;
4426 $module_root_directory = &module_root_directory($module_name);
4429 if ($module_name && !$main::no_acl_check &&
4430 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4431 # Check if the HTTP user can access this module
4432 if (!&foreign_available($module_name)) {
4433 if (!&foreign_check($module_name)) {
4434 &error(&text('emodulecheck',
4435 "<i>$module_info{'desc'}</i>"));
4438 &error(&text('emodule', "<i>$u</i>",
4439 "<i>$module_info{'desc'}</i>"));
4442 $main::no_acl_check++;
4445 # Check the Referer: header for nasty redirects
4446 my @referers = split(/\s+/, $gconfig{'referers'});
4448 my $r = $ENV{'HTTP_REFERER'};
4449 if ($r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?\[([^\]]+)\]/ ||
4450 $r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4453 my $http_host = $ENV{'HTTP_HOST'};
4454 $http_host =~ s/:\d+$//;
4455 $http_host =~ s/^\[(\S+)\]$/$1/;
4456 my $unsafe_index = $unsafe_index_cgi ||
4457 &get_module_variable('$unsafe_index_cgi');
4459 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4460 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4462 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4463 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4464 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4465 ($referer_site && $referer_site ne $http_host &&
4466 &indexof($referer_site, @referers) < 0 ||
4467 !$referer_site && $gconfig{'referers_none'}) &&
4468 !$trust_unknown_referers &&
4469 !&get_module_variable('$trust_unknown_referers')) {
4470 # Looks like a link from elsewhere .. show an error
4471 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4473 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4474 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4475 if ($referer_site) {
4477 print &text('referer_warn',
4478 "<tt>".&html_escape($r)."</tt>", $url);
4480 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4481 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4484 # No referer info given
4485 print &text('referer_warn_unknown', $url),"<p>\n";
4486 print &text('referer_fix1u'),"<p>\n";
4487 print &text('referer_fix2u'),"<p>\n";
4491 &footer("/", $text{'index'});
4494 $main::no_referers_check++;
4495 $main::completed_referers_check++;
4497 # Call theme post-init
4498 if (defined(&theme_post_init_config)) {
4499 &theme_post_init_config(@_);
4502 # Record that we have done the calling library in this package
4503 my ($callpkg, $lib) = caller();
4505 $main::done_foreign_require{$callpkg,$lib} = 1;
4507 # If a licence checking is enabled, do it now
4508 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4509 &foreign_check($gconfig{'licence_module'}) &&
4510 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4511 my $oldpwd = &get_current_dir();
4512 $main::done_licence_module_check++;
4513 $main::licence_module = $gconfig{'licence_module'};
4514 &foreign_require($main::licence_module, "licence_check.pl");
4515 ($main::licence_status, $main::licence_message) =
4516 &foreign_call($main::licence_module, "check_licence");
4520 # Export global variables to caller
4521 if ($main::export_to_caller) {
4522 foreach my $v ('$config_file', '%gconfig', '$null_file',
4523 '$path_separator', '@root_directories',
4524 '$root_directory', '$module_name',
4525 '$base_remote_user', '$remote_user',
4526 '$remote_user_proto', '%remote_user_attrs',
4527 '$module_config_directory', '$module_config_file',
4528 '%config', '@current_themes', '$current_theme',
4529 '@theme_root_directories', '$theme_root_directory',
4530 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4531 '$webmin_logfile', '$current_lang',
4532 '$current_lang_info', '@lang_order_list', '%text',
4533 '%module_info', '$module_root_directory') {
4534 my ($vt, $vn) = split('', $v, 2);
4535 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4542 =head2 load_language([module], [directory])
4544 Returns a hashtable mapping text codes to strings in the appropriate language,
4545 based on the $current_lang global variable, which is in turn set based on
4546 the Webmin user's selection. The optional module parameter tells the function
4547 which module to load strings for, and defaults to the calling module. The
4548 optional directory parameter can be used to load strings from a directory
4551 In regular module development you will never need to call this function
4552 directly, as init_config calls it for you, and places the module's strings
4553 into the %text hash.
4559 my $root = $root_directory;
4560 my $ol = $gconfig{'overlang'};
4561 my ($dir) = ($_[1] || "lang");
4563 # Read global lang files
4564 foreach my $o (@lang_order_list) {
4565 my $ok = &read_file_cached_with_stat("$root/$dir/$o", \%text);
4566 return () if (!$ok && $o eq $default_lang);
4569 foreach my $o (@lang_order_list) {
4570 &read_file_cached("$root/$ol/$o", \%text);
4573 &read_file_cached("$config_directory/custom-lang", \%text);
4574 foreach my $o (@lang_order_list) {
4575 next if ($o eq "en");
4576 &read_file_cached("$config_directory/custom-lang.$o", \%text);
4578 my $norefs = $text{'__norefs'};
4581 # Read module's lang files
4582 delete($text{'__norefs'});
4583 my $mdir = &module_root_directory($_[0]);
4584 foreach my $o (@lang_order_list) {
4585 &read_file_cached_with_stat("$mdir/$dir/$o", \%text);
4588 foreach my $o (@lang_order_list) {
4589 &read_file_cached("$mdir/$ol/$o", \%text);
4592 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4593 foreach my $o (@lang_order_list) {
4594 next if ($o eq "en");
4595 &read_file_cached("$config_directory/$_[0]/custom-lang.$o",
4598 $norefs = $text{'__norefs'} if ($norefs);
4601 # Replace references to other strings
4603 foreach $k (keys %text) {
4604 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4608 if (defined(&theme_load_language)) {
4609 &theme_load_language(\%text, $_[0]);
4614 =head2 text_subs(string)
4616 Used internally by load_language to expand $code substitutions in language
4622 if (substr($_[0], 0, 8) eq "include:") {
4625 open(INCLUDE, substr($_[0], 8));
4633 my $t = $_[1]->{$_[0]};
4634 return defined($t) ? $t : '$'.$_[0];
4638 =head2 text(message, [substitute]+)
4640 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4641 the substitute parameters. This makes it easy to use strings with placeholders
4642 that get replaced with programmatically generated text. For example :
4644 print &text('index_hello', $remote_user),"<p>\n";
4649 my $t = &get_module_variable('%text', 1);
4650 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4651 for(my $i=1; $i<@_; $i++) {
4652 $rv =~ s/\$$i/$_[$i]/g;
4657 =head2 encode_base64(string)
4659 Encodes a string into base64 format, for use in MIME email or HTTP
4660 authorization headers.
4666 pos($_[0]) = 0; # ensure start at the beginning
4667 while ($_[0] =~ /(.{1,57})/gs) {
4668 $res .= substr(pack('u57', $1), 1)."\n";
4671 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4672 my $padding = (3 - length($_[0]) % 3) % 3;
4673 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4677 =head2 decode_base64(string)
4679 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4686 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4687 if (length($str) % 4) {
4690 $str =~ s/=+$//; # remove padding
4691 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4692 while ($str =~ /(.{1,60})/gs) {
4693 my $len = chr(32 + length($1)*3/4); # compute length byte
4694 $res .= unpack("u", $len . $1 ); # uudecode
4699 =head2 get_module_info(module, [noclone], [forcache])
4701 Returns a hash containg details of the given module. Some useful keys are :
4703 =item dir - The module directory, like sendmail.
4705 =item desc - Human-readable description, in the current users' language.
4707 =item version - Optional module version number.
4709 =item os_support - List of supported operating systems and versions.
4711 =item category - Category on Webmin's left menu, like net.
4716 return () if ($_[0] =~ /^\./);
4717 my (%rv, $clone, $o);
4718 my $mdir = &module_root_directory($_[0]);
4719 &read_file_cached("$mdir/module.info", \%rv) || return ();
4721 # A clone is a module that links to another directory under the root
4722 foreach my $r (@root_directories) {
4723 if (&is_under_directory($r, $mdir)) {
4729 foreach $o (@lang_order_list) {
4730 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4731 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4733 if ($clone && !$_[1] && $config_directory) {
4734 $rv{'clone'} = $rv{'desc'};
4735 &read_file("$config_directory/$_[0]/clone", \%rv);
4738 my %module_categories;
4739 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4740 my $pn = &get_product_name();
4741 if (defined($rv{'category_'.$pn})) {
4742 # Can override category for webmin/usermin
4743 $rv{'category'} = $rv{'category_'.$pn};
4745 $rv{'realcategory'} = $rv{'category'};
4746 $rv{'category'} = $module_categories{$_[0]}
4747 if (defined($module_categories{$_[0]}));
4749 # Apply description overrides
4750 $rv{'realdesc'} = $rv{'desc'};
4752 &read_file_cached("$config_directory/webmin.descs", \%descs);
4753 if ($descs{$_[0]}) {
4754 $rv{'desc'} = $descs{$_[0]};
4756 foreach my $o (@lang_order_list) {
4757 my $ov = $descs{$_[0]." ".$o} || $descs{$_[0]."_".$o};
4758 $rv{'desc'} = $ov if ($ov);
4762 # Apply per-user description overridde
4763 my %gaccess = &get_module_acl(undef, "");
4764 if ($gaccess{'desc_'.$_[0]}) {
4765 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4769 if ($rv{'longdesc'}) {
4770 # All standard modules have an index.cgi
4771 $rv{'index_link'} = 'index.cgi';
4774 # Call theme-specific override function
4775 if (defined(&theme_get_module_info)) {
4776 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4782 =head2 get_all_module_infos(cachemode)
4784 Returns a list contains the information on all modules in this webmin
4785 install, including clones. Uses caching to reduce the number of module.info
4786 files that need to be read. Each element of the array is a hash reference
4787 in the same format as returned by get_module_info. The cache mode flag can be :
4788 0 = read and write, 1 = don't read or write, 2 = read only
4791 sub get_all_module_infos
4795 # Is the cache out of date? (ie. have any of the root's changed?)
4796 my $cache_file = "$config_directory/module.infos.cache";
4798 if (&read_file_cached($cache_file, \%cache)) {
4799 foreach my $r (@root_directories) {
4801 if ($st[9] != $cache{'mtime_'.$r}) {
4811 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4812 # Can use existing module.info cache
4814 foreach my $k (keys %cache) {
4815 if ($k =~ /^(\S+) (\S+)$/) {
4816 $mods{$1}->{$2} = $cache{$k};
4819 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4822 # Need to rebuild cache
4824 foreach my $r (@root_directories) {
4826 foreach my $m (readdir(DIR)) {
4827 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4828 my %minfo = &get_module_info($m, 0, 1);
4829 next if (!%minfo || !$minfo{'dir'});
4831 foreach $k (keys %minfo) {
4832 $cache{"${m} ${k}"} = $minfo{$k};
4837 $cache{'mtime_'.$r} = $st[9];
4839 $cache{'lang'} = $current_lang;
4840 if (!$_[0] && $< == 0 && $> == 0) {
4842 # Don't fail if cache write fails
4843 local $main::error_must_die = 1;
4844 &write_file($cache_file, \%cache);
4849 # Override descriptions for modules for current user
4850 my %gaccess = &get_module_acl(undef, "");
4851 foreach my $m (@rv) {
4852 if ($gaccess{"desc_".$m->{'dir'}}) {
4853 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4857 # Apply installed flags
4859 &read_file_cached("$config_directory/installed.cache", \%installed);
4860 foreach my $m (@rv) {
4861 $m->{'installed'} = $installed{$m->{'dir'}};
4867 =head2 get_theme_info(theme)
4869 Returns a hash containing a theme's details, taken from it's theme.info file.
4870 Some useful keys are :
4872 =item dir - The theme directory, like blue-theme.
4874 =item desc - Human-readable description, in the current users' language.
4876 =item version - Optional module version number.
4878 =item os_support - List of supported operating systems and versions.
4883 return () if ($_[0] =~ /^\./);
4885 my $tdir = &module_root_directory($_[0]);
4886 &read_file("$tdir/theme.info", \%rv) || return ();
4887 foreach my $o (@lang_order_list) {
4888 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4894 =head2 list_languages
4896 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4897 Each is a hash reference with the following keys :
4899 =item lang - The short language code, like es for Spanish.
4901 =item desc - A human-readable description, in English.
4903 =item charset - An optional character set to use when displaying the language.
4905 =item titles - Set to 1 only if Webmin has title images for the language.
4907 =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.
4912 if (!@main::list_languages_cache) {
4915 open(LANG, "$root_directory/lang_list.txt");
4917 if (/^(\S+)\s+(.*)/) {
4918 my $l = { 'desc' => $2 };
4919 foreach $o (split(/,/, $1)) {
4920 if ($o =~ /^([^=]+)=(.*)$/) {
4924 $l->{'index'} = scalar(@rv);
4925 push(@main::list_languages_cache, $l);
4929 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4930 @main::list_languages_cache;
4932 return @main::list_languages_cache;
4935 =head2 read_env_file(file, &hash, [include-commented])
4937 Similar to Webmin's read_file function, but handles files containing shell
4938 environment variables formatted like :
4943 The file parameter is the full path to the file to read, and hash a Perl hash
4944 ref to read names and values into.
4950 &open_readfile(FILE, $_[0]) || return 0;
4953 # Remove start of line comments
4957 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4958 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4959 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4967 =head2 write_env_file(file, &hash, [export])
4969 Writes out a hash to a file in name='value' format, suitable for use in a shell
4970 script. The parameters are :
4972 =item file - Full path for a file to write to
4974 =item hash - Hash reference of names and values to write.
4976 =item export - If set to 1, preceed each variable setting with the word 'export'.
4981 my $exp = $_[2] ? "export " : "";
4982 &open_tempfile(FILE, ">$_[0]");
4983 foreach my $k (keys %{$_[1]}) {
4984 my $v = $_[1]->{$k};
4985 if ($v =~ /^\S+$/) {
4986 &print_tempfile(FILE, "$exp$k=$v\n");
4989 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4992 &close_tempfile(FILE);
4995 =head2 lock_file(filename, [readonly], [forcefile])
4997 Lock a file for exclusive access. If the file is already locked, spin
4998 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4999 to work OK. The parameters are :
5001 =item filename - File or directory to lock.
5003 =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.
5005 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
5010 my $realfile = &translate_filename($_[0]);
5011 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
5012 my $no_lock = !&can_lock_file($realfile);
5013 my $lock_tries_count = 0;
5016 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
5021 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
5024 # Create the .lock file
5025 open(LOCKING, ">$realfile.lock") || return 0;
5026 my $lck = eval "flock(LOCKING, 2+4)";
5028 # Lock of lock file failed! Wait till later
5031 print LOCKING $$,"\n";
5032 eval "flock(LOCKING, 8)";
5035 $main::locked_file_list{$realfile} = int($_[1]);
5036 push(@main::temporary_files, "$realfile.lock");
5037 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
5038 !&get_module_variable('$no_log_file_changes') &&
5040 # Grab a copy of this file for later diffing
5042 $main::locked_file_data{$realfile} = undef;
5044 $main::locked_file_type{$realfile} = 1;
5045 $main::locked_file_data{$realfile} = '';
5047 elsif (!$_[2] && ($lnk = readlink($realfile))) {
5048 $main::locked_file_type{$realfile} = 2;
5049 $main::locked_file_data{$realfile} = $lnk;
5051 elsif (open(ORIGFILE, $realfile)) {
5052 $main::locked_file_type{$realfile} = 0;
5053 $main::locked_file_data{$realfile} = '';
5056 $main::locked_file_data{$realfile} .=$_;
5065 if ($lock_tries_count++ > 5*60) {
5066 # Give up after 5 minutes
5067 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
5073 =head2 unlock_file(filename)
5075 Release a lock on a file taken out by lock_file. If Webmin actions logging of
5076 file changes is enabled, then at unlock file a diff will be taken between the
5077 old and new contents, and stored under /var/webmin/diffs when webmin_log is
5078 called. This can then be viewed in the Webmin Actions Log module.
5083 my $realfile = &translate_filename($_[0]);
5084 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
5085 unlink("$realfile.lock") if (&can_lock_file($realfile));
5086 delete($main::locked_file_list{$realfile});
5087 if (exists($main::locked_file_data{$realfile})) {
5088 # Diff the new file with the old
5090 my $lnk = readlink($realfile);
5091 my $type = -d _ ? 1 : $lnk ? 2 : 0;
5092 my $oldtype = $main::locked_file_type{$realfile};
5093 my $new = !defined($main::locked_file_data{$realfile});
5094 if ($new && !-e _) {
5095 # file doesn't exist, and never did! do nothing ..
5097 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
5098 # is (or was) a directory ..
5099 if (-d _ && !defined($main::locked_file_data{$realfile})) {
5100 push(@main::locked_file_diff,
5101 { 'type' => 'mkdir', 'object' => $realfile });
5103 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
5104 push(@main::locked_file_diff,
5105 { 'type' => 'rmdir', 'object' => $realfile });
5108 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
5109 # is (or was) a symlink ..
5110 if ($lnk && !defined($main::locked_file_data{$realfile})) {
5111 push(@main::locked_file_diff,
5112 { 'type' => 'symlink', 'object' => $realfile,
5115 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
5116 push(@main::locked_file_diff,
5117 { 'type' => 'unsymlink', 'object' => $realfile,
5118 'data' => $main::locked_file_data{$realfile} });
5120 elsif ($lnk ne $main::locked_file_data{$realfile}) {
5121 push(@main::locked_file_diff,
5122 { 'type' => 'resymlink', 'object' => $realfile,
5127 # is a file, or has changed type?!
5128 my ($diff, $delete_file);
5129 my $type = "modify";
5131 open(NEWFILE, ">$realfile");
5136 if (!defined($main::locked_file_data{$realfile})) {
5139 open(ORIGFILE, ">$realfile.webminorig");
5140 print ORIGFILE $main::locked_file_data{$realfile};
5142 $diff = &backquote_command(
5143 "diff ".quotemeta("$realfile.webminorig")." ".
5144 quotemeta($realfile)." 2>/dev/null");
5145 push(@main::locked_file_diff,
5146 { 'type' => $type, 'object' => $realfile,
5147 'data' => $diff } ) if ($diff);
5148 unlink("$realfile.webminorig");
5149 unlink($realfile) if ($delete_file);
5152 if ($gconfig{'logfullfiles'}) {
5153 # Add file details to list of those to fully log
5154 $main::orig_file_data{$realfile} ||=
5155 $main::locked_file_data{$realfile};
5156 $main::orig_file_type{$realfile} ||=
5157 $main::locked_file_type{$realfile};
5160 delete($main::locked_file_data{$realfile});
5161 delete($main::locked_file_type{$realfile});
5165 =head2 test_lock(file)
5167 Returns 1 if some file is currently locked, 0 if not.
5172 my $realfile = &translate_filename($_[0]);
5173 return 0 if (!$_[0]);
5174 return 1 if (defined($main::locked_file_list{$realfile}));
5175 return 0 if (!&can_lock_file($realfile));
5177 if (open(LOCKING, "$realfile.lock")) {
5182 return $pid && kill(0, $pid);
5185 =head2 unlock_all_files
5187 Unlocks all files locked by the current script.
5190 sub unlock_all_files
5192 foreach $f (keys %main::locked_file_list) {
5197 =head2 can_lock_file(file)
5199 Returns 1 if some file should be locked, based on the settings in the
5200 Webmin Configuration module. For internal use by lock_file only.
5205 if (&is_readonly_mode()) {
5206 return 0; # never lock in read-only mode
5208 elsif ($gconfig{'lockmode'} == 0) {
5211 elsif ($gconfig{'lockmode'} == 1) {
5215 # Check if under any of the directories
5217 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
5218 if (&same_file($d, $_[0]) ||
5219 &is_under_directory($d, $_[0])) {
5223 return $gconfig{'lockmode'} == 2 ? $match : !$match;
5227 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
5229 Log some action taken by a user. This is typically called at the end of a
5230 script, once all file changes are complete and all commands run. The
5233 =item action - A short code for the action being performed, like 'create'.
5235 =item type - A code for the type of object the action is performed to, like 'user'.
5237 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
5239 =item params - A hash ref of additional information about the action.
5241 =item module - Name of the module in which the action was performed, which defaults to the current module.
5243 =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.
5245 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
5247 =item client-ip - IP address of the browser that performed the action.
5252 return if (!$gconfig{'log'} || &is_readonly_mode());
5253 my $m = $_[4] ? $_[4] : &get_module_name();
5255 if ($gconfig{'logclear'}) {
5256 # check if it is time to clear the log
5257 my @st = stat("$webmin_logfile.time");
5258 my $write_logtime = 0;
5260 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
5261 # clear logfile and all diff files
5262 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
5263 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
5264 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
5265 unlink($webmin_logfile);
5272 if ($write_logtime) {
5273 open(LOGTIME, ">$webmin_logfile.time");
5274 print LOGTIME time(),"\n";
5279 # If an action script directory is defined, call the appropriate scripts
5280 if ($gconfig{'action_script_dir'}) {
5281 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
5282 my ($basedir) = $gconfig{'action_script_dir'};
5284 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
5287 opendir(DIR, $dir) or die "Can't open $dir: $!";
5288 while (defined($file = readdir(DIR))) {
5289 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
5290 if (-x "$dir/$file") {
5291 # Call a script notifying it of the action
5293 $ENV{'ACTION_MODULE'} = &get_module_name();
5294 $ENV{'ACTION_ACTION'} = $_[0];
5295 $ENV{'ACTION_TYPE'} = $_[1];
5296 $ENV{'ACTION_OBJECT'} = $_[2];
5297 $ENV{'ACTION_SCRIPT'} = $script_name;
5298 foreach my $p (keys %param) {
5299 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5301 system("$dir/$file", @_,
5302 "<$null_file", ">$null_file", "2>&1");
5310 # should logging be done at all?
5311 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5312 split(/\s+/, $gconfig{'logusers'})) < 0);
5313 return if ($gconfig{'logmodules'} && &indexof($m,
5314 split(/\s+/, $gconfig{'logmodules'})) < 0);
5318 my @tm = localtime($now);
5319 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5320 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5321 my $idprefix = substr($now, 0, 5);
5322 $main::action_id_count++;
5323 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5324 $id, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5325 $tm[2], $tm[1], $tm[0],
5326 $remote_user || '-',
5327 $main::session_id || '-',
5328 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5329 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5330 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5332 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5333 my $v = $_[3]->{$k};
5339 elsif (ref($v) eq 'ARRAY') {
5343 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5344 $line .= " $k='$vv'";
5348 foreach $vv (split(/\0/, $v)) {
5350 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5351 $line .= " $k='$vv'";
5354 $param{$k} = join(" ", @pv);
5356 open(WEBMINLOG, ">>$webmin_logfile");
5357 print WEBMINLOG $line,"\n";
5359 if ($gconfig{'logperms'}) {
5360 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5363 chmod(0600, $webmin_logfile);
5366 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5367 # Find and record the changes made to any locked files, or commands run
5369 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5370 foreach my $d (@main::locked_file_diff) {
5371 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$idprefix", 0700);
5372 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id", 0700);
5373 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i");
5374 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5375 print DIFFLOG $d->{'data'};
5377 if ($d->{'input'}) {
5379 ">$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i.input");
5380 print DIFFLOG $d->{'input'};
5383 if ($gconfig{'logperms'}) {
5384 chmod(oct($gconfig{'logperms'}),
5385 "$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i",
5386 "$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i.input");
5390 @main::locked_file_diff = undef;
5393 if ($gconfig{'logfullfiles'}) {
5394 # Save the original contents of any modified files
5396 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5397 foreach my $f (keys %main::orig_file_data) {
5398 mkdir("$ENV{'WEBMIN_VAR'}/files/$idprefix", 0700);
5399 mkdir("$ENV{'WEBMIN_VAR'}/files/$idprefix/$id", 0700);
5400 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$idprefix/$id/$i");
5401 if (!defined($main::orig_file_type{$f})) {
5402 print ORIGLOG -1," ",$f,"\n";
5405 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5407 print ORIGLOG $main::orig_file_data{$f};
5409 if ($gconfig{'logperms'}) {
5410 chmod(oct($gconfig{'logperms'}),
5411 "$ENV{'WEBMIN_VAR'}/files/$idprefix/$id.$i");
5415 %main::orig_file_data = undef;
5416 %main::orig_file_type = undef;
5419 if ($miniserv::page_capture_out) {
5420 # Save the whole page output
5421 mkdir("$ENV{'WEBMIN_VAR'}/output", 0700);
5422 mkdir("$ENV{'WEBMIN_VAR'}/output/$idprefix", 0700);
5423 open(PAGEOUT, ">$ENV{'WEBMIN_VAR'}/output/$idprefix/$id");
5424 print PAGEOUT $miniserv::page_capture_out;
5426 if ($gconfig{'logperms'}) {
5427 chmod(oct($gconfig{'logperms'}),
5428 "$ENV{'WEBMIN_VAR'}/output/$idprefix/$id");
5430 $miniserv::page_capture_out = undef;
5434 if ($gconfig{'logsyslog'}) {
5435 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5436 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5437 setlogsock("inet");';
5439 # Syslog module is installed .. try to convert to a
5440 # human-readable form
5442 my $mod = &get_module_name();
5443 my $mdir = module_root_directory($mod);
5444 if (-r "$mdir/log_parser.pl") {
5445 &foreign_require($mod, "log_parser.pl");
5447 foreach my $k (keys %{$_[3]}) {
5448 my $v = $_[3]->{$k};
5449 if (ref($v) eq 'ARRAY') {
5450 $params{$k} = join("\0", @$v);
5456 $msg = &foreign_call($mod, "parse_webmin_log",
5457 $remote_user, $script_name,
5458 $_[0], $_[1], $_[2], \%params);
5459 $msg =~ s/<[^>]*>//g; # Remove tags
5461 elsif ($_[0] eq "_config_") {
5462 my %wtext = &load_language("webminlog");
5463 $msg = $wtext{'search_config'};
5465 $msg ||= "$_[0] $_[1] $_[2]";
5466 my %info = &get_module_info($m);
5467 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5472 =head2 additional_log(type, object, data, [input])
5474 Records additional log data for an upcoming call to webmin_log, such
5475 as a command that was run or SQL that was executed. Typically you will never
5476 need to call this function directory.
5481 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5482 push(@main::locked_file_diff,
5483 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5484 'input' => $_[3] } );
5488 =head2 webmin_debug_log(type, message)
5490 Write something to the Webmin debug log. For internal use only.
5493 sub webmin_debug_log
5495 my ($type, $msg) = @_;
5496 return 0 if (!$main::opened_debug_log);
5497 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5498 if ($gconfig{'debug_modules'}) {
5499 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5500 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5503 eval 'use Time::HiRes qw(gettimeofday); ($now, $ms) = gettimeofday';
5505 my @tm = localtime($now);
5507 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d.%6.6d] %s %s %s %s \"%s\"",
5508 $$, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5509 $tm[2], $tm[1], $tm[0], $ms,
5510 $remote_user || "-",
5511 $ENV{'REMOTE_HOST'} || "-",
5512 &get_module_name() || "-",
5515 seek(main::DEBUGLOG, 0, 2);
5516 print main::DEBUGLOG $line."\n";
5520 =head2 system_logged(command)
5522 Just calls the Perl system() function, but also logs the command run.
5527 if (&is_readonly_mode()) {
5528 print STDERR "Vetoing command $_[0]\n";
5531 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5532 my $cmd = join(" ", @realcmd);
5534 if ($cmd =~ s/(\s*&\s*)$//) {
5537 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5538 $cmd =~ s/^\((.*)\)\s*$/$1/;
5540 &additional_log('exec', undef, $cmd);
5541 return system(@realcmd);
5544 =head2 backquote_logged(command)
5546 Executes a command and returns the output (like `command`), but also logs it.
5549 sub backquote_logged
5551 if (&is_readonly_mode()) {
5553 print STDERR "Vetoing command $_[0]\n";
5556 my $realcmd = &translate_command($_[0]);
5559 if ($cmd =~ s/(\s*&\s*)$//) {
5562 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5563 $cmd =~ s/^\((.*)\)\s*$/$1/;
5565 &additional_log('exec', undef, $cmd);
5566 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5570 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5572 Runs some command, waiting at most the given number of seconds for it to
5573 complete, and returns the output. The maxlines parameter sets the number
5574 of lines of output to capture. The safe parameter should be set to 1 if the
5575 command is safe for read-only mode users to run.
5578 sub backquote_with_timeout
5580 my $realcmd = &translate_command($_[0]);
5581 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5582 if ($gconfig{'debug_what_cmd'});
5584 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5589 my $elapsed = time() - $start;
5590 last if ($elapsed > $_[1]);
5592 vec($rmask, fileno(OUT), 1) = 1;
5593 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5594 last if (!$sel || $sel < 0);
5596 last if (!defined($line));
5599 if ($_[3] && $linecount >= $_[3]) {
5604 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5608 return wantarray ? ($out, $timed_out) : $out;
5611 =head2 backquote_command(command, safe?)
5613 Executes a command and returns the output (like `command`), subject to
5614 command translation. The safe parameter should be set to 1 if the command
5615 is safe for read-only mode users to run.
5618 sub backquote_command
5620 if (&is_readonly_mode() && !$_[1]) {
5621 print STDERR "Vetoing command $_[0]\n";
5625 my $realcmd = &translate_command($_[0]);
5626 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5630 =head2 kill_logged(signal, pid, ...)
5632 Like Perl's built-in kill function, but also logs the fact that some process
5633 was killed. On Windows, falls back to calling process.exe to terminate a
5639 return scalar(@_)-1 if (&is_readonly_mode());
5640 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5641 if ($gconfig{'debug_what_procs'});
5642 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5643 if ($gconfig{'os_type'} eq 'windows') {
5644 # Emulate some kills with process.exe
5645 my $arg = $_[0] eq "KILL" ? "-k" :
5646 $_[0] eq "TERM" ? "-q" :
5647 $_[0] eq "STOP" ? "-s" :
5648 $_[0] eq "CONT" ? "-r" : undef;
5650 foreach my $p (@_[1..@_-1]) {
5652 $ok ||= kill($_[0], $p);
5655 &execute_command("process $arg $p");
5667 =head2 rename_logged(old, new)
5669 Re-names a file and logs the rename. If the old and new files are on different
5670 filesystems, calls mv or the Windows rename function to do the job.
5675 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5676 return &rename_file($_[0], $_[1]);
5679 =head2 rename_file(old, new)
5681 Renames a file or directory. If the old and new files are on different
5682 filesystems, calls mv or the Windows rename function to do the job.
5687 if (&is_readonly_mode()) {
5688 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5691 my $src = &translate_filename($_[0]);
5692 my $dst = &translate_filename($_[1]);
5693 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5694 if ($gconfig{'debug_what_ops'});
5695 my $ok = rename($src, $dst);
5696 if (!$ok && $! !~ /permission/i) {
5697 # Try the mv command, in case this is a cross-filesystem rename
5698 if ($gconfig{'os_type'} eq 'windows') {
5699 # Need to use rename
5700 my $out = &backquote_command("rename ".quotemeta($_[0]).
5701 " ".quotemeta($_[1])." 2>&1");
5703 $! = $out if (!$ok);
5707 my $out = &backquote_command("mv ".quotemeta($_[0]).
5708 " ".quotemeta($_[1])." 2>&1");
5710 $! = $out if (!$ok);
5716 =head2 symlink_logged(src, dest)
5718 Create a symlink, and logs it. Effectively does the same thing as the Perl
5725 my $rv = &symlink_file($_[0], $_[1]);
5726 &unlock_file($_[1]);
5730 =head2 symlink_file(src, dest)
5732 Creates a soft link, unless in read-only mode. Effectively does the same thing
5733 as the Perl symlink function.
5738 if (&is_readonly_mode()) {
5739 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5742 my $src = &translate_filename($_[0]);
5743 my $dst = &translate_filename($_[1]);
5744 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5745 if ($gconfig{'debug_what_ops'});
5746 return symlink($src, $dst);
5749 =head2 link_file(src, dest)
5751 Creates a hard link, unless in read-only mode. The existing new link file
5752 will be deleted if necessary. Effectively the same as Perl's link function.
5757 if (&is_readonly_mode()) {
5758 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5761 my $src = &translate_filename($_[0]);
5762 my $dst = &translate_filename($_[1]);
5763 &webmin_debug_log('LINK', "src=$src dst=$dst")
5764 if ($gconfig{'debug_what_ops'});
5765 unlink($dst); # make sure link works
5766 return link($src, $dst);
5769 =head2 make_dir(dir, perms, recursive)
5771 Creates a directory and sets permissions on it, unless in read-only mode.
5772 The perms parameter sets the octal permissions to apply, which unlike Perl's
5773 mkdir will really get set. The recursive flag can be set to 1 to have the
5774 function create parent directories too.
5779 my ($dir, $perms, $recur) = @_;
5780 if (&is_readonly_mode()) {
5781 print STDERR "Vetoing directory $dir\n";
5784 $dir = &translate_filename($dir);
5785 my $exists = -d $dir ? 1 : 0;
5786 return 1 if ($exists && $recur); # already exists
5787 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5788 my $rv = mkdir($dir, $perms);
5789 if (!$rv && $recur) {
5790 # Failed .. try mkdir -p
5791 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5792 my $ex = &execute_command("mkdir $param "."e_path($dir));
5798 chmod($perms, $dir);
5803 =head2 set_ownership_permissions(user, group, perms, file, ...)
5805 Sets the user, group owner and permissions on some files. The parameters are :
5807 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5809 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5811 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5813 =item file - One or more files or directories to modify.
5816 sub set_ownership_permissions
5818 my ($user, $group, $perms, @files) = @_;
5819 if (&is_readonly_mode()) {
5820 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5823 @files = map { &translate_filename($_) } @files;
5824 if ($gconfig{'debug_what_ops'}) {
5825 foreach my $f (@files) {
5826 &webmin_debug_log('PERMS',
5827 "file=$f user=$user group=$group perms=$perms");
5831 if (defined($user)) {
5832 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5834 if (defined($group)) {
5835 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5838 my @uinfo = getpwuid($uid);
5841 $rv = chown($uid, $gid, @files);
5843 if ($rv && defined($perms)) {
5844 $rv = chmod($perms, @files);
5849 =head2 unlink_logged(file, ...)
5851 Like Perl's unlink function, but locks the files beforehand and un-locks them
5852 after so that the deletion is logged by Webmin.
5858 foreach my $f (@_) {
5859 if (!&test_lock($f)) {
5864 my @rv = &unlink_file(@_);
5865 foreach my $f (@_) {
5870 return wantarray ? @rv : $rv[0];
5873 =head2 unlink_file(file, ...)
5875 Deletes some files or directories. Like Perl's unlink function, but also
5876 recursively deletes directories with the rm command if needed.
5881 return 1 if (&is_readonly_mode());
5884 foreach my $f (@_) {
5885 &unflush_file_lines($f);
5886 my $realf = &translate_filename($f);
5887 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5889 if (!rmdir($realf)) {
5891 if ($gconfig{'os_type'} eq 'windows') {
5892 # Call del and rmdir commands
5895 my $out = `del /q "$qm" 2>&1`;
5897 $out = `rmdir "$qm" 2>&1`;
5902 my $qm = quotemeta($realf);
5903 $out = `rm -rf $qm 2>&1`;
5912 if (!unlink($realf)) {
5918 return wantarray ? ($rv, $err) : $rv;
5921 =head2 copy_source_dest(source, dest)
5923 Copy some file or directory to a new location. Returns 1 on success, or 0
5924 on failure - also sets $! on failure. If the source is a directory, uses
5925 piped tar commands to copy a whole directory structure including permissions
5929 sub copy_source_dest
5931 return (1, undef) if (&is_readonly_mode());
5932 my ($src, $dst) = @_;
5935 &webmin_debug_log('COPY', "src=$src dst=$dst")
5936 if ($gconfig{'debug_what_ops'});
5937 if ($gconfig{'os_type'} eq 'windows') {
5938 # No tar or cp on windows, so need to use copy command
5942 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5945 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5953 # A directory .. need to copy with tar command
5954 my @st = stat($src);
5957 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5958 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5965 # Can just copy with cp
5966 my $out = &backquote_logged("cp -p ".quotemeta($src).
5967 " ".quotemeta($dst)." 2>&1");
5973 return wantarray ? ($ok, $err) : $ok;
5976 =head2 remote_session_name(host|&server)
5978 Generates a session ID for some server. For this server, this will always
5979 be an empty string. For a server object it will include the hostname and
5980 port and PID. For a server name, it will include the hostname and PID. For
5984 sub remote_session_name
5986 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5987 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5988 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5989 ref($_[0]) ? "" : "$_[0].$$";
5992 =head2 remote_foreign_require(server, module, file)
5994 Connects to rpc.cgi on a remote webmin server and have it open a session
5995 to a process that will actually do the require and run functions. This is the
5996 equivalent for foreign_require, but for a remote Webmin system. The server
5997 parameter can either be a hostname of a system registered in the Webmin
5998 Servers Index module, or a hash reference for a system from that module.
6001 sub remote_foreign_require
6003 my $call = { 'action' => 'require',
6006 my $sn = &remote_session_name($_[0]);
6007 if ($remote_session{$sn}) {
6008 $call->{'session'} = $remote_session{$sn};
6011 $call->{'newsession'} = 1;
6013 my $rv = &remote_rpc_call($_[0], $call);
6014 if ($rv->{'session'}) {
6015 $remote_session{$sn} = $rv->{'session'};
6016 $remote_session_server{$sn} = $_[0];
6020 =head2 remote_foreign_call(server, module, function, [arg]*)
6022 Call a function on a remote server. Must have been setup first with
6023 remote_foreign_require for the same server and module. Equivalent to
6024 foreign_call, but with the extra server parameter to specify the remote
6028 sub remote_foreign_call
6030 return undef if (&is_readonly_mode());
6031 my $sn = &remote_session_name($_[0]);
6032 return &remote_rpc_call($_[0], { 'action' => 'call',
6035 'session' => $remote_session{$sn},
6036 'args' => [ @_[3 .. $#_] ] } );
6039 =head2 remote_foreign_check(server, module, [api-only])
6041 Checks if some module is installed and supported on a remote server. Equivilant
6042 to foreign_check, but for the remote Webmin system specified by the server
6046 sub remote_foreign_check
6048 return &remote_rpc_call($_[0], { 'action' => 'check',
6053 =head2 remote_foreign_config(server, module)
6055 Gets the configuration for some module from a remote server, as a hash.
6056 Equivalent to foreign_config, but for a remote system.
6059 sub remote_foreign_config
6061 return &remote_rpc_call($_[0], { 'action' => 'config',
6062 'module' => $_[1] });
6065 =head2 remote_eval(server, module, code)
6067 Evaluates some perl code in the context of a module on a remote webmin server.
6068 The server parameter must be the hostname of a remote system, module must
6069 be a module directory name, and code a string of Perl code to run. This can
6070 only be called after remote_foreign_require for the same server and module.
6075 return undef if (&is_readonly_mode());
6076 my $sn = &remote_session_name($_[0]);
6077 return &remote_rpc_call($_[0], { 'action' => 'eval',
6080 'session' => $remote_session{$sn} });
6083 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
6085 Transfers some local file to another server via Webmin's RPC protocol, and
6086 returns the resulting remote filename. If the remotefile parameter is given,
6087 that is the destination filename which will be used. Otherwise a randomly
6088 selected temporary filename will be used, and returned by the function.
6093 return undef if (&is_readonly_mode());
6095 my $sn = &remote_session_name($_[0]);
6096 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6097 # Copy data over TCP connection
6098 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
6100 'name' => $_[3] } );
6102 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6103 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
6104 return &$main::remote_error_handler("Failed to transfer file : $error")
6107 while(read(FILE, $got, 1024) > 0) {
6111 shutdown(TWRITE, 1);
6113 if ($error && $error !~ /^OK/) {
6114 # Got back an error!
6115 return &$main::remote_error_handler("Failed to transfer file : $error");
6121 # Just pass file contents as parameters
6123 while(read(FILE, $got, 1024) > 0) {
6127 return &remote_rpc_call($_[0], { 'action' => 'write',
6130 'session' => $remote_session{$sn} });
6134 =head2 remote_read(server, localfile, remotefile)
6136 Transfers a file from a remote server to this system, using Webmin's RPC
6137 protocol. The server parameter must be the hostname of a system registered
6138 in the Webmin Servers Index module, localfile is the destination path on this
6139 system, and remotefile is the file to fetch from the remote server.
6144 my $sn = &remote_session_name($_[0]);
6145 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6146 # Copy data over TCP connection
6147 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
6148 'file' => $_[2] } );
6150 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
6153 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6154 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
6155 return &$main::remote_error_handler("Failed to transfer file : $error")
6158 open(FILE, ">$_[1]");
6159 while(read(TREAD, $got, 1024) > 0) {
6166 # Just get data as return value
6167 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
6169 'session' => $remote_session{$sn} });
6170 open(FILE, ">$_[1]");
6176 =head2 remote_finished
6178 Close all remote sessions. This happens automatically after a while
6179 anyway, but this function should be called to clean things up faster.
6184 foreach my $sn (keys %remote_session) {
6185 my $server = $remote_session_server{$sn};
6186 &remote_rpc_call($server, { 'action' => 'quit',
6187 'session' => $remote_session{$sn} } );
6188 delete($remote_session{$sn});
6189 delete($remote_session_server{$sn});
6191 foreach my $fh (keys %fast_fh_cache) {
6193 delete($fast_fh_cache{$fh});
6197 =head2 remote_error_setup(&function)
6199 Sets a function to be called instead of &error when a remote RPC operation
6200 fails. Useful if you want to have more control over your remote operations.
6203 sub remote_error_setup
6205 $main::remote_error_handler = $_[0] || \&error;
6208 =head2 remote_rpc_call(server, &structure)
6210 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
6211 and then reads back a reply structure. This is mainly for internal use only,
6212 and is called by the other remote_* functions.
6218 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
6220 # Server structure was given
6222 $serv->{'user'} || $serv->{'id'} == 0 ||
6223 return &$main::remote_error_handler(
6224 "No Webmin login set for server");
6227 # lookup the server in the webmin servers module if needed
6228 if (!%main::remote_servers_cache) {
6229 &foreign_require("servers", "servers-lib.pl");
6230 foreach $s (&foreign_call("servers", "list_servers")) {
6231 $main::remote_servers_cache{$s->{'host'}} = $s;
6232 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
6235 $serv = $main::remote_servers_cache{$_[0]};
6236 $serv || return &$main::remote_error_handler(
6237 "No Webmin Servers entry for $_[0]");
6238 $serv->{'user'} || return &$main::remote_error_handler(
6239 "No login set for server $_[0]");
6241 my $ip = $serv->{'ip'} || $serv->{'host'};
6243 # Work out the username and password
6245 if ($serv->{'sameuser'}) {
6246 $user = $remote_user;
6247 defined($main::remote_pass) || return &$main::remote_error_handler(
6248 "Password for this server is not available");
6249 $pass = $main::remote_pass;
6252 $user = $serv->{'user'};
6253 $pass = $serv->{'pass'};
6256 if ($serv->{'fast'} || !$sn) {
6257 # Make TCP connection call to fastrpc.cgi
6258 if (!$fast_fh_cache{$sn} && $sn) {
6259 # Need to open the connection
6260 my $con = &make_http_connection(
6261 $ip, $serv->{'port'}, $serv->{'ssl'},
6262 "POST", "/fastrpc.cgi");
6263 return &$main::remote_error_handler(
6264 "Failed to connect to $serv->{'host'} : $con")
6266 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6267 &write_http_connection($con, "User-agent: Webmin\r\n");
6268 my $auth = &encode_base64("$user:$pass");
6270 &write_http_connection($con, "Authorization: basic $auth\r\n");
6271 &write_http_connection($con, "Content-length: ",
6272 length($tostr),"\r\n");
6273 &write_http_connection($con, "\r\n");
6274 &write_http_connection($con, $tostr);
6276 # read back the response
6277 my $line = &read_http_connection($con);
6278 $line =~ tr/\r\n//d;
6279 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6280 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6282 $line =~ /^HTTP\/1\..\s+200\s+/ ||
6283 return &$main::remote_error_handler("HTTP error : $line");
6285 $line = &read_http_connection($con);
6286 $line =~ tr/\r\n//d;
6288 $line = &read_http_connection($con);
6289 if ($line =~ /^0\s+(.*)/) {
6290 return &$main::remote_error_handler("RPC error : $1");
6292 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
6293 $line =~ /^1\s+(\S+)\s+(\S+)/) {
6294 # Started ok .. connect and save SID
6295 &close_http_connection($con);
6296 my ($port, $sid, $version, $error) = ($1, $2, $3);
6297 &open_socket($ip, $port, $sid, \$error);
6298 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
6300 $fast_fh_cache{$sn} = $sid;
6301 $remote_server_version{$sn} = $version;
6304 while($stuff = &read_http_connection($con)) {
6307 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
6310 elsif (!$fast_fh_cache{$sn}) {
6311 # Open the connection by running fastrpc.cgi locally
6312 pipe(RPCOUTr, RPCOUTw);
6316 open(STDOUT, ">&RPCOUTw");
6320 $ENV{'REQUEST_METHOD'} = 'GET';
6321 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6322 $ENV{'SERVER_ROOT'} ||= $root_directory;
6324 if ($base_remote_user ne 'root' &&
6325 $base_remote_user ne 'admin') {
6326 # Need to fake up a login for the CGI!
6327 &read_acl(undef, \%acl, [ 'root' ]);
6328 $ENV{'BASE_REMOTE_USER'} =
6329 $ENV{'REMOTE_USER'} =
6330 $acl{'root'} ? 'root' : 'admin';
6332 delete($ENV{'FOREIGN_MODULE_NAME'});
6333 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6334 chdir($root_directory);
6335 if (!exec("$root_directory/fastrpc.cgi")) {
6336 print "exec failed : $!\n";
6343 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6347 if ($line =~ /^0\s+(.*)/) {
6348 return &$main::remote_error_handler("RPC error : $2");
6350 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6351 # Started ok .. connect and save SID
6353 my ($port, $sid, $error) = ($1, $2, undef);
6354 &open_socket("localhost", $port, $sid, \$error);
6355 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6356 $fast_fh_cache{$sn} = $sid;
6363 &error("Bad response from fastrpc.cgi : $line");
6366 # Got a connection .. send off the request
6367 my $fh = $fast_fh_cache{$sn};
6368 my $tostr = &serialise_variable($_[1]);
6369 print $fh length($tostr)," $fh\n";
6373 return &$main::remote_error_handler(
6374 "Error reading response length from fastrpc.cgi : $!")
6376 my $rlen = int($rstr);
6377 my ($fromstr, $got);
6378 while(length($fromstr) < $rlen) {
6379 return &$main::remote_error_handler(
6380 "Failed to read from fastrpc.cgi : $!")
6381 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6384 my $from = &unserialise_variable($fromstr);
6386 # No response at all
6387 return &$main::remote_error_handler("Remote Webmin error");
6389 elsif (ref($from) ne 'HASH') {
6391 return &$main::remote_error_handler(
6392 "Invalid remote Webmin response : $from");
6394 elsif (!$from->{'status'}) {
6396 $from->{'rv'} =~ s/\s+at\s+(\S+)\s+line\s+(\d+)(,\s+<\S+>\s+line\s+(\d+))?//;
6397 return &$main::remote_error_handler($from->{'rv'});
6399 if (defined($from->{'arv'})) {
6400 return @{$from->{'arv'}};
6403 return $from->{'rv'};
6407 # Call rpc.cgi on remote server
6408 my $tostr = &serialise_variable($_[1]);
6410 my $con = &make_http_connection($ip, $serv->{'port'},
6411 $serv->{'ssl'}, "POST", "/rpc.cgi");
6412 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6414 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6415 &write_http_connection($con, "User-agent: Webmin\r\n");
6416 my $auth = &encode_base64("$user:$pass");
6418 &write_http_connection($con, "Authorization: basic $auth\r\n");
6419 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6420 &write_http_connection($con, "\r\n");
6421 &write_http_connection($con, $tostr);
6423 # read back the response
6424 my $line = &read_http_connection($con);
6425 $line =~ tr/\r\n//d;
6426 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6427 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6429 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6431 $line = &read_http_connection($con);
6432 $line =~ tr/\r\n//d;
6435 while($line = &read_http_connection($con)) {
6439 my $from = &unserialise_variable($fromstr);
6440 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6441 if (defined($from->{'arv'})) {
6442 return @{$from->{'arv'}};
6445 return $from->{'rv'};
6450 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6452 Executes some function in parallel on multiple servers at once. Fills in
6453 the returns and errors arrays respectively. If the module and library
6454 parameters are given, that module is remotely required on the server first,
6455 to check if it is connectable. The parameters are :
6457 =item servers - A list of Webmin system hash references.
6459 =item parallel - Number of parallel operations to perform.
6461 =item function - Reference to function to call for each system.
6463 =item args - Additional parameters to the function.
6465 =item returns - Array ref to place return values into, in same order as servers.
6467 =item errors - Array ref to place error messages into.
6469 =item module - Optional module to require on the remote system first.
6471 =item library - Optional library to require in the module.
6474 sub remote_multi_callback
6476 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6477 &remote_error_setup(\&remote_multi_callback_error);
6479 # Call the functions
6481 foreach my $g (@$servs) {
6487 $remote_multi_callback_err = undef;
6489 # Require the remote lib
6490 &remote_foreign_require($g->{'host'}, $mod, $lib);
6491 if ($remote_multi_callback_err) {
6492 # Failed .. return error
6493 print $wh &serialise_variable(
6494 [ undef, $remote_multi_callback_err ]);
6500 my $a = ref($args) ? $args->[$p] : $args;
6501 my $rv = &$func($g, $a);
6504 print $wh &serialise_variable(
6505 [ $rv, $remote_multi_callback_err ]);
6513 # Read back the results
6515 foreach my $g (@$servs) {
6519 $errs->[$p] = "Failed to read response from $g->{'host'}";
6522 my $rv = &unserialise_variable($line);
6524 $rets->[$p] = $rv->[0];
6525 $errs->[$p] = $rv->[1];
6530 &remote_error_setup(undef);
6533 sub remote_multi_callback_error
6535 $remote_multi_callback_err = $_[0];
6538 =head2 serialise_variable(variable)
6540 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6541 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6542 called on each member to serialize the entire object.
6545 sub serialise_variable
6547 if (!defined($_[0])) {
6553 $rv = &urlize($_[0]);
6555 elsif ($r eq 'SCALAR') {
6556 $rv = &urlize(${$_[0]});
6558 elsif ($r eq 'ARRAY') {
6559 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6561 elsif ($r eq 'HASH') {
6562 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6563 &urlize(&serialise_variable($_[0]->{$_})) }
6566 elsif ($r eq 'REF') {
6567 $rv = &serialise_variable(${$_[0]});
6569 elsif ($r eq 'CODE') {
6574 # An object - treat as a hash
6575 $r = "OBJECT ".&urlize($r);
6576 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6577 &urlize(&serialise_variable($_[0]->{$_})) }
6580 return ($r ? $r : 'VAL').",".$rv;
6583 =head2 unserialise_variable(string)
6585 Converts a string created by serialise_variable() back into the original
6586 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6587 object, the same class is used on this system, if available.
6590 sub unserialise_variable
6592 my @v = split(/,/, $_[0]);
6594 if ($v[0] eq 'VAL') {
6595 @v = split(/,/, $_[0], -1);
6596 $rv = &un_urlize($v[1]);
6598 elsif ($v[0] eq 'SCALAR') {
6599 local $r = &un_urlize($v[1]);
6602 elsif ($v[0] eq 'ARRAY') {
6604 for(my $i=1; $i<@v; $i++) {
6605 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6608 elsif ($v[0] eq 'HASH') {
6610 for(my $i=1; $i<@v; $i+=2) {
6611 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6612 &unserialise_variable(&un_urlize($v[$i+1]));
6615 elsif ($v[0] eq 'REF') {
6616 local $r = &unserialise_variable($v[1]);
6619 elsif ($v[0] eq 'UNDEF') {
6622 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6623 # An object hash that we have to re-bless
6626 for(my $i=1; $i<@v; $i+=2) {
6627 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6628 &unserialise_variable(&un_urlize($v[$i+1]));
6636 =head2 other_groups(user)
6638 Returns a list of secondary groups a user is a member of, as a list of
6647 while(my @g = getgrent()) {
6648 my @m = split(/\s+/, $g[3]);
6649 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6651 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6655 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6657 Returns HTML for a button that pops up a data chooser window. The parameters
6660 =item dayfield - Name of the text field to place the day of the month into.
6662 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6664 =item yearfield - Name of the text field to place the year into.
6667 sub date_chooser_button
6669 return &theme_date_chooser_button(@_)
6670 if (defined(&theme_date_chooser_button));
6671 my ($w, $h) = (250, 225);
6672 if ($gconfig{'db_sizedate'}) {
6673 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6675 return "<input type=button onClick='window.dfield = form.$_[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";
6678 =head2 help_file(module, file)
6680 Returns the path to a module's help file of some name, typically under the
6681 help directory with a .html extension.
6686 my $mdir = &module_root_directory($_[0]);
6687 my $dir = "$mdir/help";
6688 foreach my $o (@lang_order_list) {
6689 my $lang = "$dir/$_[1].$o.html";
6690 return $lang if (-r $lang);
6692 return "$dir/$_[1].html";
6697 Seeds the random number generator, if not already done in this script. On Linux
6698 this makes use of the current time, process ID and a read from /dev/urandom.
6699 On other systems, only the current time and process ID are used.
6704 if (!$main::done_seed_random) {
6705 if (open(RANDOM, "/dev/urandom")) {
6707 read(RANDOM, $buf, 4);
6709 srand(time() ^ $$ ^ $buf);
6714 $main::done_seed_random = 1;
6718 =head2 disk_usage_kb(directory)
6720 Returns the number of kB used by some directory and all subdirs. Implemented
6721 by calling the C<du -k> command.
6726 my $dir = &translate_filename($_[0]);
6728 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6730 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6732 return $out =~ /^([0-9]+)/ ? $1 : "???";
6735 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6737 Returns the number of bytes taken up by all files in some directory and all
6738 sub-directories, by summing up their lengths. The disk_usage_kb is more
6739 reflective of reality, as the filesystem typically pads file sizes to 1k or
6743 sub recursive_disk_usage
6745 my $dir = &translate_filename($_[0]);
6752 my @st = stat($dir);
6758 my @files = readdir(DIR);
6760 foreach my $f (@files) {
6761 next if ($f eq "." || $f eq "..");
6762 next if ($skip && $f =~ /$skip/);
6763 next if ($only && $f !~ /$only/);
6764 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6770 =head2 help_search_link(term, [ section, ... ] )
6772 Returns HTML for a link to the man module for searching local and online
6773 docs for various search terms. The term parameter can either be a single
6774 word like 'bind', or a space-separated list of words. This function is typically
6775 used by modules that want to refer users to additional documentation in man
6776 pages or local system doc files.
6779 sub help_search_link
6781 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6782 my $for = &urlize(shift(@_));
6783 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6784 join("&", map { "section=$_" } @_)."&".
6785 "for=$for&exact=1&check=".&get_module_name()."'>".
6786 $text{'helpsearch'}."</a>\n";
6793 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6795 Opens a connection to some HTTP server, maybe through a proxy, and returns
6796 a handle object. The handle can then be used to send additional headers
6797 and read back a response. If anything goes wrong, returns an error string.
6798 The parameters are :
6800 =item host - Hostname or IP address of the webserver to connect to.
6802 =item port - HTTP port number to connect to.
6804 =item ssl - Set to 1 to connect in SSL mode.
6806 =item method - HTTP method, like GET or POST.
6808 =item page - Page to request on the webserver, like /foo/index.html
6810 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6813 sub make_http_connection
6815 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6818 foreach my $h (@$headers) {
6819 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6823 if (&is_readonly_mode()) {
6824 return "HTTP connections not allowed in readonly mode";
6826 my $rv = { 'fh' => time().$$ };
6829 eval "use Net::SSLeay";
6830 $@ && return $text{'link_essl'};
6831 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6832 eval "Net::SSLeay::load_error_strings()";
6833 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6834 return "Failed to create SSL context";
6835 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6836 return "Failed to create SSL connection";
6838 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6839 !&no_proxy($host)) {
6842 &open_socket($1, $2, $rv->{'fh'}, \$error);
6845 my $fh = $rv->{'fh'};
6846 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6847 if ($gconfig{'proxy_user'}) {
6848 my $auth = &encode_base64(
6849 "$gconfig{'proxy_user'}:".
6850 "$gconfig{'proxy_pass'}");
6851 $auth =~ tr/\r\n//d;
6852 print $fh "Proxy-Authorization: Basic $auth\r\n";
6856 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6857 return "Proxy error : $3" if ($2 != 200);
6860 return "Proxy error : $line";
6865 elsif (!$gconfig{'proxy_fallback'}) {
6866 # Connection to proxy failed - give up
6873 &open_socket($host, $port, $rv->{'fh'}, \$error);
6874 return $error if ($error);
6876 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6877 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6878 return "SSL connect() failed";
6879 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6880 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6883 # Plain HTTP request
6885 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6886 !&no_proxy($host)) {
6889 &open_socket($1, $2, $rv->{'fh'}, \$error);
6893 my $fh = $rv->{'fh'};
6894 my $rtxt = $method." ".
6895 "http://$host:$port$page HTTP/1.0\r\n";
6896 if ($gconfig{'proxy_user'}) {
6897 my $auth = &encode_base64(
6898 "$gconfig{'proxy_user'}:".
6899 "$gconfig{'proxy_pass'}");
6900 $auth =~ tr/\r\n//d;
6901 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6906 elsif (!$gconfig{'proxy_fallback'}) {
6911 # Connecting directly
6913 &open_socket($host, $port, $rv->{'fh'}, \$error);
6914 return $error if ($error);
6915 my $fh = $rv->{'fh'};
6916 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6923 =head2 read_http_connection(&handle, [bytes])
6925 Reads either one line or up to the specified number of bytes from the handle,
6926 originally supplied by make_http_connection.
6929 sub read_http_connection
6933 if ($h->{'ssl_con'}) {
6936 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6937 # need to read more..
6938 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6940 $rv = $h->{'buffer'};
6941 delete($h->{'buffer'});
6944 $h->{'buffer'} .= $more;
6946 $rv = substr($h->{'buffer'}, 0, $idx+1);
6947 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6950 if (length($h->{'buffer'})) {
6951 $rv = $h->{'buffer'};
6952 delete($h->{'buffer'});
6955 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6961 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6964 my $fh = $h->{'fh'};
6968 $rv = undef if ($rv eq "");
6972 =head2 write_http_connection(&handle, [data+])
6974 Writes the given data to the given HTTP connection handle.
6977 sub write_http_connection
6980 my $fh = $h->{'fh'};
6982 if ($h->{'ssl_ctx'}) {
6983 foreach my $s (@_) {
6984 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6985 $allok = 0 if (!$ok);
6989 my $ok = (print $fh @_);
6990 $allok = 0 if (!$ok);
6995 =head2 close_http_connection(&handle)
6997 Closes a connection to an HTTP server, identified by the given handle.
7000 sub close_http_connection
7006 =head2 clean_environment
7008 Deletes any environment variables inherited from miniserv so that they
7009 won't be passed to programs started by webmin. This is useful when calling
7010 programs that check for CGI-related environment variables and modify their
7011 behaviour, and to avoid passing sensitive variables to un-trusted programs.
7014 sub clean_environment
7016 %UNCLEAN_ENV = %ENV;
7017 foreach my $k (keys %ENV) {
7018 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
7022 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
7023 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
7024 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
7025 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
7026 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
7027 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
7028 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
7029 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
7035 =head2 reset_environment
7037 Puts the environment back how it was before clean_environment was callled.
7040 sub reset_environment
7043 foreach my $k (keys %UNCLEAN_ENV) {
7044 $ENV{$k} = $UNCLEAN_ENV{$k};
7046 undef(%UNCLEAN_ENV);
7050 =head2 progress_callback
7052 Never called directly, but useful for passing to &http_download to print
7053 out progress of an HTTP request.
7056 sub progress_callback
7058 if (defined(&theme_progress_callback)) {
7059 # Call the theme override
7060 return &theme_progress_callback(@_);
7064 print $progress_callback_prefix;
7066 $progress_size = $_[1];
7067 $progress_step = int($_[1] / 10);
7068 print &text('progress_size2', $progress_callback_url,
7069 &nice_size($progress_size)),"<br>\n";
7072 $progress_size = undef;
7073 print &text('progress_nosize', $progress_callback_url),"<br>\n";
7075 $last_progress_time = $last_progress_size = undef;
7077 elsif ($_[0] == 3) {
7079 my $sp = $progress_callback_prefix.(" " x 5);
7080 if ($progress_size) {
7081 # And we have a size to compare against
7082 my $st = int(($_[1] * 10) / $progress_size);
7083 my $time_now = time();
7084 if ($st != $progress_step ||
7085 $time_now - $last_progress_time > 60) {
7086 # Show progress every 10% or 60 seconds
7087 print $sp,&text('progress_datan', &nice_size($_[1]),
7088 int($_[1]*100/$progress_size)),"<br>\n";
7089 $last_progress_time = $time_now;
7091 $progress_step = $st;
7094 # No total size .. so only show in 100k jumps
7095 if ($_[1] > $last_progress_size+100*1024) {
7096 print $sp,&text('progress_data2n',
7097 &nice_size($_[1])),"<br>\n";
7098 $last_progress_size = $_[1];
7102 elsif ($_[0] == 4) {
7103 # All done downloading
7104 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
7106 elsif ($_[0] == 5) {
7107 # Got new location after redirect
7108 $progress_callback_url = $_[1];
7110 elsif ($_[0] == 6) {
7112 $progress_callback_url = $_[1];
7113 print &text('progress_incache', $progress_callback_url),"<br>\n";
7117 =head2 switch_to_remote_user
7119 Changes the user and group of the current process to that of the unix user
7120 with the same name as the current webmin login, or fails if there is none.
7121 This should be called by Usermin module scripts that only need to run with
7122 limited permissions.
7125 sub switch_to_remote_user
7127 @remote_user_info = $remote_user ? getpwnam($remote_user) :
7129 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
7130 &create_missing_homedir(\@remote_user_info);
7132 &switch_to_unix_user(\@remote_user_info);
7133 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
7134 $ENV{'HOME'} = $remote_user_info[7];
7136 # Export global variables to caller
7137 if ($main::export_to_caller) {
7138 my ($callpkg) = caller();
7139 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
7143 =head2 switch_to_unix_user(&user-details)
7145 Switches the current process to the UID and group ID from the given list
7146 of user details, which must be in the format returned by getpwnam.
7149 sub switch_to_unix_user
7152 if (!defined($uinfo->[0])) {
7153 # No username given, so just use given GID
7154 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
7157 # Use all groups from user
7158 ($(, $)) = ( $uinfo->[3],
7159 "$uinfo->[3] ".join(" ", $uinfo->[3],
7160 &other_groups($uinfo->[0])) );
7163 POSIX::setuid($uinfo->[2]);
7165 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
7166 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
7170 =head2 eval_as_unix_user(username, &code)
7172 Runs some code fragment with the effective UID and GID switch to that
7173 of the given Unix user, so that file IO takes place with his permissions.
7177 sub eval_as_unix_user
7179 my ($user, $code) = @_;
7180 my @uinfo = getpwnam($user);
7181 if (!scalar(@uinfo)) {
7182 &error("eval_as_unix_user called with invalid user $user");
7184 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
7188 local $main::error_must_die = 1;
7195 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
7198 return wantarray ? @rv : $rv[0];
7201 =head2 create_user_config_dirs
7203 Creates per-user config directories and sets $user_config_directory and
7204 $user_module_config_directory to them. Also reads per-user module configs
7205 into %userconfig. This should be called by Usermin module scripts that need
7206 to store per-user preferences or other settings.
7209 sub create_user_config_dirs
7211 return if (!$gconfig{'userconfig'});
7212 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
7213 return if (!@uinfo || !$uinfo[7]);
7214 &create_missing_homedir(\@uinfo);
7215 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
7216 if (!-d $user_config_directory) {
7217 mkdir($user_config_directory, 0700) ||
7218 &error("Failed to create $user_config_directory : $!");
7219 if ($< == 0 && $uinfo[2]) {
7220 chown($uinfo[2], $uinfo[3], $user_config_directory);
7223 if (&get_module_name()) {
7224 $user_module_config_directory = $user_config_directory."/".
7226 if (!-d $user_module_config_directory) {
7227 mkdir($user_module_config_directory, 0700) ||
7228 &error("Failed to create $user_module_config_directory : $!");
7229 if ($< == 0 && $uinfo[2]) {
7230 chown($uinfo[2], $uinfo[3], $user_config_directory);
7234 &read_file_cached("$module_root_directory/defaultuconfig",
7236 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
7237 &read_file_cached("$user_module_config_directory/config",
7241 # Export global variables to caller
7242 if ($main::export_to_caller) {
7243 my ($callpkg) = caller();
7244 foreach my $v ('$user_config_directory',
7245 '$user_module_config_directory', '%userconfig') {
7246 my ($vt, $vn) = split('', $v, 2);
7247 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
7252 =head2 create_missing_homedir(&uinfo)
7254 If auto homedir creation is enabled, create one for this user if needed.
7255 For internal use only.
7258 sub create_missing_homedir
7261 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
7262 # Use has no home dir .. make one
7263 system("mkdir -p ".quotemeta($uinfo->[7]));
7264 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
7265 if ($gconfig{'create_homedir_perms'} ne '') {
7266 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
7271 =head2 filter_javascript(text)
7273 Disables all javascript <script>, onClick= and so on tags in the given HTML,
7274 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
7277 sub filter_javascript
7280 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
7281 $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;
7282 $rv =~ s/(javascript:)/x$1/gi;
7283 $rv =~ s/(vbscript:)/x$1/gi;
7287 =head2 resolve_links(path)
7289 Given a path that may contain symbolic links, returns the real path.
7295 $path =~ s/\/+/\//g;
7296 $path =~ s/\/$// if ($path ne "/");
7297 my @p = split(/\/+/, $path);
7299 for(my $i=0; $i<@p; $i++) {
7300 my $sofar = "/".join("/", @p[0..$i]);
7301 my $lnk = readlink($sofar);
7302 if ($lnk eq $sofar) {
7303 # Link to itself! Cannot do anything more really ..
7306 elsif ($lnk =~ /^\//) {
7307 # Link is absolute..
7308 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
7312 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
7318 =head2 simplify_path(path, bogus)
7320 Given a path, maybe containing elements ".." and "." , convert it to a
7321 clean, absolute form. Returns undef if this is not possible.
7329 my @bits = split(/\/+/, $dir);
7332 foreach my $b (@bits) {
7336 elsif ($b eq "..") {
7338 if (scalar(@fixedbits) == 0) {
7339 # Cannot! Already at root!
7346 push(@fixedbits, $b);
7349 return "/".join('/', @fixedbits);
7352 =head2 same_file(file1, file2)
7354 Returns 1 if two files are actually the same
7359 return 1 if ($_[0] eq $_[1]);
7360 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7361 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7362 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7363 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7364 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7365 return 0 if (!@stat1 || !@stat2);
7366 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7369 =head2 flush_webmin_caches
7371 Clears all in-memory and on-disk caches used by Webmin.
7374 sub flush_webmin_caches
7376 undef(%main::read_file_cache);
7377 undef(%main::acl_hash_cache);
7378 undef(%main::acl_array_cache);
7379 undef(%main::has_command_cache);
7380 undef(@main::list_languages_cache);
7381 undef($main::got_list_usermods_cache);
7382 undef(@main::list_usermods_cache);
7383 undef(%main::foreign_installed_cache);
7384 unlink("$config_directory/module.infos.cache");
7385 &get_all_module_infos();
7388 =head2 list_usermods
7390 Returns a list of additional module restrictions. For internal use in
7396 if (!$main::got_list_usermods_cache) {
7397 @main::list_usermods_cache = ( );
7399 open(USERMODS, "$config_directory/usermin.mods");
7401 if (/^([^:]+):(\+|-|):(.*)/) {
7402 push(@main::list_usermods_cache,
7403 [ $1, $2, [ split(/\s+/, $3) ] ]);
7407 $main::got_list_usermods_cache = 1;
7409 return @main::list_usermods_cache;
7412 =head2 available_usermods(&allmods, &usermods)
7414 Returns a list of modules that are available to the given user, based
7415 on usermod additional/subtractions. For internal use by Usermin only.
7418 sub available_usermods
7420 return @{$_[0]} if (!@{$_[1]});
7422 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7423 my @uinfo = @remote_user_info;
7424 @uinfo = getpwnam($remote_user) if (!@uinfo);
7425 foreach my $u (@{$_[1]}) {
7427 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7430 elsif ($u->[0] =~ /^\@(.*)$/) {
7431 # Check for group membership
7432 my @ginfo = getgrnam($1);
7433 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7434 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7436 elsif ($u->[0] =~ /^\//) {
7437 # Check users and groups in file
7439 open(USERFILE, $u->[0]);
7442 if ($_ eq $remote_user) {
7445 elsif (/^\@(.*)$/) {
7446 my @ginfo = getgrnam($1);
7448 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7449 &indexof($remote_user,
7450 split(/\s+/, $ginfo[3])) >= 0));
7457 if ($u->[1] eq "+") {
7458 map { $mods{$_}++ } @{$u->[2]};
7460 elsif ($u->[1] eq "-") {
7461 map { delete($mods{$_}) } @{$u->[2]};
7465 map { $mods{$_}++ } @{$u->[2]};
7469 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7472 =head2 get_available_module_infos(nocache)
7474 Returns a list of modules available to the current user, based on
7475 operating system support, access control and usermod restrictions. Useful
7476 in themes that need to display a list of modules the user can use.
7477 Each element of the returned array is a hash reference in the same format as
7478 returned by get_module_info.
7481 sub get_available_module_infos
7484 &read_acl(\%acl, \%uacl, [ $base_remote_user ]);
7485 my $risk = $gconfig{'risk_'.$base_remote_user};
7487 foreach my $minfo (&get_all_module_infos($_[0])) {
7488 next if (!&check_os_support($minfo));
7490 # Check module risk level
7491 next if ($risk ne 'high' && $minfo->{'risk'} &&
7492 $minfo->{'risk'} !~ /$risk/);
7496 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7497 !$acl{$base_remote_user,"*"});
7499 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7503 # Check usermod restrictions
7504 my @usermods = &list_usermods();
7505 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7506 &available_usermods(\@rv, \@usermods);
7508 # Check RBAC restrictions
7510 foreach my $m (@rv) {
7511 if (&supports_rbac($m->{'dir'}) &&
7512 &use_rbac_module_acl(undef, $m->{'dir'})) {
7513 local $rbacs = &get_rbac_module_acl($remote_user,
7521 # Module or system doesn't support RBAC
7522 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7528 if (defined(&theme_foreign_available)) {
7529 foreach my $m (@rbacrv) {
7530 if (&theme_foreign_available($m->{'dir'})) {
7539 # Check licence module vetos
7541 if ($main::licence_module) {
7542 foreach my $m (@themerv) {
7543 if (&foreign_call($main::licence_module,
7544 "check_module_licence", $m->{'dir'})) {
7556 =head2 get_visible_module_infos(nocache)
7558 Like get_available_module_infos, but excludes hidden modules from the list.
7559 Each element of the returned array is a hash reference in the same format as
7560 returned by get_module_info.
7563 sub get_visible_module_infos
7566 my $pn = &get_product_name();
7567 return grep { !$_->{'hidden'} &&
7568 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7571 =head2 get_visible_modules_categories(nocache)
7573 Returns a list of Webmin module categories, each of which is a hash ref
7574 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7575 of modules in the category, in the format returned by get_module_info.
7576 Un-used modules are automatically assigned to the 'unused' category, and
7577 those with no category are put into 'others'.
7580 sub get_visible_modules_categories
7583 my @mods = &get_visible_module_infos($nocache);
7585 if (&get_product_name() eq 'webmin') {
7586 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7587 @mods = grep { $_->{'installed'} ne '0' } @mods;
7589 my %cats = &list_categories(\@mods);
7591 foreach my $c (keys %cats) {
7592 my $cat = { 'code' => $c || 'other',
7593 'desc' => $cats{$c} };
7594 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7597 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7598 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7600 # Add un-installed modules in magic category
7601 my $cat = { 'code' => 'unused',
7602 'desc' => $text{'main_unused'},
7604 'modules' => \@unmods };
7610 =head2 is_under_directory(directory, file)
7612 Returns 1 if the given file is under the specified directory, 0 if not.
7613 Symlinks are taken into account in the file to find it's 'real' location.
7616 sub is_under_directory
7618 my ($dir, $file) = @_;
7619 return 1 if ($dir eq "/");
7620 return 0 if ($file =~ /\.\./);
7621 my $ld = &resolve_links($dir);
7623 return &is_under_directory($ld, $file);
7625 my $lp = &resolve_links($file);
7627 return &is_under_directory($dir, $lp);
7629 return 0 if (length($file) < length($dir));
7630 return 1 if ($dir eq $file);
7632 return substr($file, 0, length($dir)) eq $dir;
7635 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7637 Given an absolute URL, returns the host, port, page and ssl flag components.
7638 If a username and password are given before the hostname, return those too.
7639 Relative URLs can also be parsed, if the base information is provided.
7644 if ($_[0] =~ /^(http|https):\/\/([^\@]+\@)?\[([^\]]+)\](:(\d+))?(\/\S*)?$/ ||
7645 $_[0] =~ /^(http|https):\/\/([^\@]+\@)?([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7647 my $ssl = $1 eq 'https';
7648 my @rv = ($3, $4 ? $5 : $ssl ? 443 : 80, $6 || "/", $ssl);
7649 if ($2 =~ /^([^:]+):(\S+)\@/) {
7658 elsif ($_[0] =~ /^\/\S*$/) {
7659 # A relative to the server URL
7660 return ($_[1], $_[2], $_[0], $_[4], $_[5], $_[6]);
7663 # A relative to the directory URL
7665 $page =~ s/[^\/]+$//;
7666 return ($_[1], $_[2], $page.$_[0], $_[4], $_[5], $_[6]);
7670 =head2 check_clicks_function
7672 Returns HTML for a JavaScript function called check_clicks that returns
7673 true when first called, but false subsequently. Useful on onClick for
7674 critical buttons. Deprecated, as this method of preventing duplicate actions
7678 sub check_clicks_function
7683 function check_clicks(form)
7690 for(i=0; i<form.length; i++)
7691 form.elements[i].disabled = true;
7700 =head2 load_entities_map
7702 Returns a hash ref containing mappings between HTML entities (like ouml) and
7703 ascii values (like 246). Mainly for internal use.
7706 sub load_entities_map
7708 if (!%entities_map_cache) {
7710 open(EMAP, "$root_directory/entities_map.txt");
7712 if (/^(\d+)\s+(\S+)/) {
7713 $entities_map_cache{$2} = $1;
7718 return \%entities_map_cache;
7721 =head2 entities_to_ascii(string)
7723 Given a string containing HTML entities like ö and 7, replace them
7724 with their ASCII equivalents.
7727 sub entities_to_ascii
7730 my $emap = &load_entities_map();
7731 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7732 $str =~ s/&#(\d+);/chr($1)/ge;
7736 =head2 get_product_name
7738 Returns either 'webmin' or 'usermin', depending on which program the current
7739 module is in. Useful for modules that can be installed into either.
7742 sub get_product_name
7744 return $gconfig{'product'} if (defined($gconfig{'product'}));
7745 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7750 Returns the character set for the current language, such as iso-8859-1.
7755 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7756 $current_lang_info->{'charset'} ?
7757 $current_lang_info->{'charset'} : $default_charset;
7761 =head2 get_display_hostname
7763 Returns the system's hostname for UI display purposes. This may be different
7764 from the actual hostname if you administrator has configured it so in the
7765 Webmin Configuration module.
7768 sub get_display_hostname
7770 if ($gconfig{'hostnamemode'} == 0) {
7771 return &get_system_hostname();
7773 elsif ($gconfig{'hostnamemode'} == 3) {
7774 return $gconfig{'hostnamedisplay'};
7777 my $h = $ENV{'HTTP_HOST'};
7779 if ($gconfig{'hostnamemode'} == 2) {
7780 $h =~ s/^(www|ftp|mail)\.//i;
7786 =head2 save_module_config([&config], [modulename])
7788 Saves the configuration for some module. The config parameter is an optional
7789 hash reference of names and values to save, which defaults to the global
7790 %config hash. The modulename parameter is the module to update the config
7791 file, which defaults to the current module.
7794 sub save_module_config
7796 my $c = $_[0] || { &get_module_variable('%config') };
7797 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7798 &write_file("$config_directory/$m/config", $c);
7801 =head2 save_user_module_config([&config], [modulename])
7803 Saves the user's Usermin preferences for some module. The config parameter is
7804 an optional hash reference of names and values to save, which defaults to the
7805 global %userconfig hash. The modulename parameter is the module to update the
7806 config file, which defaults to the current module.
7809 sub save_user_module_config
7811 my $c = $_[0] || { &get_module_variable('%userconfig') };
7812 my $m = $_[1] || &get_module_name();
7813 my $ucd = $user_config_directory;
7815 my @uinfo = @remote_user_info ? @remote_user_info
7816 : getpwnam($remote_user);
7817 return if (!@uinfo || !$uinfo[7]);
7818 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7820 &write_file("$ucd/$m/config", $c);
7823 =head2 nice_size(bytes, [min])
7825 Converts a number of bytes into a number followed by a suffix like GB, MB
7826 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7827 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7832 my ($units, $uname);
7833 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7834 $units = 1024*1024*1024*1024;
7837 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7838 $units = 1024*1024*1024;
7841 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7845 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7853 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7855 return $sz." ".$uname;
7858 =head2 get_perl_path
7860 Returns the path to Perl currently in use, such as /usr/bin/perl.
7865 if (open(PERL, "$config_directory/perl-path")) {
7871 return $^X if (-x $^X);
7872 return &has_command("perl");
7875 =head2 get_goto_module([&mods])
7877 Returns the details of a module that the current user should be re-directed
7878 to after logging in, or undef if none. Useful for themes.
7883 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7884 if ($gconfig{'gotomodule'}) {
7885 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7886 return $goto if ($goto);
7888 if (@mods == 1 && $gconfig{'gotoone'}) {
7894 =head2 select_all_link(field, form, [text])
7896 Returns HTML for a 'Select all' link that uses Javascript to select
7897 multiple checkboxes with the same name. The parameters are :
7899 =item field - Name of the checkbox inputs.
7901 =item form - Index of the form on the page.
7903 =item text - Message for the link, defaulting to 'Select all'.
7908 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7909 my ($field, $form, $text) = @_;
7911 $text ||= $text{'ui_selall'};
7912 return "<a class='select_all' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = true; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = true; } } return false'>$text</a>";
7915 =head2 select_invert_link(field, form, text)
7917 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7918 selection on multiple checkboxes with the same name. The parameters are :
7920 =item field - Name of the checkbox inputs.
7922 =item form - Index of the form on the page.
7924 =item text - Message for the link, defaulting to 'Invert selection'.
7927 sub select_invert_link
7929 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7930 my ($field, $form, $text) = @_;
7932 $text ||= $text{'ui_selinv'};
7933 return "<a class='select_invert' href='#' onClick='var ff = document.forms[$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>";
7936 =head2 select_rows_link(field, form, text, &rows)
7938 Returns HTML for a link that uses Javascript to select rows with particular
7939 values for their checkboxes. The parameters are :
7941 =item field - Name of the checkbox inputs.
7943 =item form - Index of the form on the page.
7945 =item text - Message for the link, de
7947 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7950 sub select_rows_link
7952 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7953 my ($field, $form, $text, $rows) = @_;
7955 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7956 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7957 $js .= "return false;";
7958 return "<a href='#' onClick='$js'>$text</a>";
7961 =head2 check_pid_file(file)
7963 Given a pid file, returns the PID it contains if the process is running.
7968 open(PIDFILE, $_[0]) || return undef;
7969 my $pid = <PIDFILE>;
7971 $pid =~ /^\s*(\d+)/ || return undef;
7972 kill(0, $1) || return undef;
7978 Return the local os-specific library name to this module. For internal use only.
7983 my $mn = &get_module_name();
7984 my $md = &module_root_directory($mn);
7985 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7986 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7988 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7989 return "$mn-$gconfig{'os_type'}-lib.pl";
7991 elsif (-r "$md/$mn-generic-lib.pl") {
7992 return "$mn-generic-lib.pl";
7999 =head2 module_root_directory(module)
8001 Given a module name, returns its root directory. On a typical Webmin install,
8002 all modules are under the same directory - but it is theoretically possible to
8006 sub module_root_directory
8008 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
8009 if (@root_directories > 1) {
8010 foreach my $r (@root_directories) {
8016 return "$root_directories[0]/$d";
8019 =head2 list_mime_types
8021 Returns a list of all known MIME types and their extensions, as a list of hash
8022 references with keys :
8024 =item type - The MIME type, like text/plain.
8026 =item exts - A list of extensions, like .doc and .avi.
8028 =item desc - A human-readable description for the MIME type.
8033 if (!@list_mime_types_cache) {
8035 open(MIME, "$root_directory/mime.types");
8039 if (s/#\s*(.*)$//g) {
8042 my ($type, @exts) = split(/\s+/);
8044 push(@list_mime_types_cache, { 'type' => $type,
8051 return @list_mime_types_cache;
8054 =head2 guess_mime_type(filename, [default])
8056 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
8057 The optional default parameter sets a default type of use if none is found,
8058 which defaults to application/octet-stream.
8063 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
8065 foreach my $t (&list_mime_types()) {
8066 foreach my $e (@{$t->{'exts'}}) {
8067 return $t->{'type'} if (lc($e) eq lc($ext));
8071 return @_ > 1 ? $_[1] : "application/octet-stream";
8074 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
8076 Opens a file handle for writing to a temporary file, which will only be
8077 renamed over the real file when the handle is closed. This allows critical
8078 files like /etc/shadow to be updated safely, even if writing fails part way
8079 through due to lack of disk space. The parameters are :
8081 =item handle - File handle to open, as you would use in Perl's open function.
8083 =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.
8085 =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 $! with the error code.
8087 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
8089 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
8095 # Just getting a temp file
8096 if (!defined($main::open_tempfiles{$_[0]})) {
8097 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
8098 my $dir = $1 || "/";
8099 my $tmp = "$dir/$2.webmintmp.$$";
8100 $main::open_tempfiles{$_[0]} = $tmp;
8101 push(@main::temporary_files, $tmp);
8103 return $main::open_tempfiles{$_[0]};
8107 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8108 $fh = &callers_package($fh);
8110 my %gaccess = &get_module_acl(undef, "");
8111 my $db = $gconfig{'debug_what_write'};
8112 if ($file =~ /\r|\n|\0/) {
8113 if ($noerror) { return 0; }
8114 else { &error("Filename contains invalid characters"); }
8116 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
8117 # Read-only mode .. veto all writes
8118 print STDERR "vetoing write to $file\n";
8119 return open($fh, ">$null_file");
8121 elsif ($file =~ /^(>|>>|)nul$/i) {
8122 # Write to Windows null device
8123 &webmin_debug_log($1 eq ">" ? "WRITE" :
8124 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
8126 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
8127 # Writes to /dev/null or TTYs don't need to be handled
8128 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
8129 return open($fh, $file);
8131 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
8132 &webmin_debug_log("WRITE", $1) if ($db);
8133 # Over-writing a file, via a temp file
8135 $file = &translate_filename($file);
8137 # Open the link target instead
8138 $file = &resolve_links($file);
8141 # Cannot open a directory!
8142 if ($noerror) { return 0; }
8143 else { &error("Cannot write to directory $file"); }
8145 my $tmp = &open_tempfile($file);
8146 my $ex = open($fh, ">$tmp");
8147 if (!$ex && $! =~ /permission/i) {
8148 # Could not open temp file .. try opening actual file
8150 $ex = open($fh, ">$file");
8151 delete($main::open_tempfiles{$file});
8154 $main::open_temphandles{$fh} = $file;
8157 if (!$ex && !$noerror) {
8158 &error(&text("efileopen", $file, $!));
8162 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
8163 # Just writing direct to a file
8164 &webmin_debug_log("WRITE", $1) if ($db);
8166 $file = &translate_filename($file);
8167 my @old_attributes = &get_clear_file_attributes($file);
8168 my $ex = open($fh, ">$file");
8169 &reset_file_attributes($file, \@old_attributes);
8170 $main::open_temphandles{$fh} = $file;
8171 if (!$ex && !$noerror) {
8172 &error(&text("efileopen", $file, $!));
8177 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
8178 # Appending to a file .. nothing special to do
8179 &webmin_debug_log("APPEND", $1) if ($db);
8181 $file = &translate_filename($file);
8182 my @old_attributes = &get_clear_file_attributes($file);
8183 my $ex = open($fh, ">>$file");
8184 &reset_file_attributes($file, \@old_attributes);
8185 $main::open_temphandles{$fh} = $file;
8186 if (!$ex && !$noerror) {
8187 &error(&text("efileopen", $file, $!));
8192 elsif ($file =~ /^([a-zA-Z]:)?\//) {
8193 # Read mode .. nothing to do here
8194 &webmin_debug_log("READ", $file) if ($db);
8195 $file = &translate_filename($file);
8196 return open($fh, $file);
8198 elsif ($file eq ">" || $file eq ">>") {
8199 my ($package, $filename, $line) = caller;
8200 if ($noerror) { return 0; }
8201 else { &error("Missing file to open at ${package}::${filename} line $line"); }
8204 my ($package, $filename, $line) = caller;
8205 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
8210 =head2 close_tempfile(file|handle)
8212 Copies a temp file to the actual file, assuming that all writes were
8213 successful. The handle must have been one passed to open_tempfile.
8219 my $fh = &callers_package($_[0]);
8221 if (defined($file = $main::open_temphandles{$fh})) {
8223 close($fh) || &error(&text("efileclose", $file, $!));
8224 delete($main::open_temphandles{$fh});
8225 return &close_tempfile($file);
8227 elsif (defined($main::open_tempfiles{$_[0]})) {
8229 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
8230 my @st = stat($_[0]);
8231 if (&is_selinux_enabled() && &has_command("chcon")) {
8232 # Set original security context
8233 system("chcon --reference=".quotemeta($_[0]).
8234 " ".quotemeta($main::open_tempfiles{$_[0]}).
8235 " >/dev/null 2>&1");
8237 my @old_attributes = &get_clear_file_attributes($_[0]);
8238 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
8240 # Set original permissions and ownership
8241 chmod($st[2], $_[0]);
8242 chown($st[4], $st[5], $_[0]);
8244 &reset_file_attributes($_[0], \@old_attributes);
8245 delete($main::open_tempfiles{$_[0]});
8246 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
8247 if ($main::open_templocks{$_[0]}) {
8248 &unlock_file($_[0]);
8249 delete($main::open_templocks{$_[0]});
8254 # Must be closing a handle not associated with a file
8260 =head2 print_tempfile(handle, text, ...)
8262 Like the normal print function, but calls &error on failure. Useful when
8263 combined with open_tempfile, to ensure that a criticial file is never
8264 only partially written.
8269 my ($fh, @args) = @_;
8270 $fh = &callers_package($fh);
8271 (print $fh @args) || &error(&text("efilewrite",
8272 $main::open_temphandles{$fh} || $fh, $!));
8275 =head2 is_selinux_enabled
8277 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
8280 sub is_selinux_enabled
8282 if (!defined($main::selinux_enabled_cache)) {
8284 if ($gconfig{'os_type'} !~ /-linux$/) {
8285 # Not on linux, so no way
8286 $main::selinux_enabled_cache = 0;
8288 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
8289 # Use global config file
8290 $main::selinux_enabled_cache =
8291 $seconfig{'SELINUX'} eq 'disabled' ||
8292 !$seconfig{'SELINUX'} ? 0 : 1;
8295 # Use selinuxenabled command
8296 #$selinux_enabled_cache =
8297 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
8298 $main::selinux_enabled_cache = 0;
8301 return $main::selinux_enabled_cache;
8304 =head2 get_clear_file_attributes(file)
8306 Finds file attributes that may prevent writing, clears them and returns them
8307 as a list. May call error. Mainly for internal use by open_tempfile and
8311 sub get_clear_file_attributes
8315 if ($gconfig{'chattr'}) {
8316 # Get original immutable bit
8317 my $out = &backquote_command(
8318 "lsattr ".quotemeta($file)." 2>/dev/null");
8320 $out =~ s/\s\S+\n//;
8321 @old_attributes = grep { $_ ne '-' } split(//, $out);
8323 if (&indexof("i", @old_attributes) >= 0) {
8324 my $err = &backquote_logged(
8325 "chattr -i ".quotemeta($file)." 2>&1");
8327 &error("Failed to remove immutable bit on ".
8332 return @old_attributes;
8335 =head2 reset_file_attributes(file, &attributes)
8337 Put back cleared attributes on some file. May call error. Mainly for internal
8338 use by close_tempfile.
8341 sub reset_file_attributes
8343 my ($file, $old_attributes) = @_;
8344 if (&indexof("i", @$old_attributes) >= 0) {
8345 my $err = &backquote_logged(
8346 "chattr +i ".quotemeta($file)." 2>&1");
8348 &error("Failed to restore immutable bit on ".
8354 =head2 cleanup_tempnames
8356 Remove all temporary files generated using transname. Typically only called
8357 internally when a Webmin script exits.
8360 sub cleanup_tempnames
8362 foreach my $t (@main::temporary_files) {
8365 @main::temporary_files = ( );
8368 =head2 open_lock_tempfile([handle], file, [no-error])
8370 Returns a temporary file for writing to some actual file, and also locks it.
8371 Effectively the same as calling lock_file and open_tempfile on the same file,
8372 but calls the unlock for you automatically when it is closed.
8375 sub open_lock_tempfile
8377 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8378 $fh = &callers_package($fh);
8379 my $lockfile = $file;
8380 $lockfile =~ s/^[^\/]*//;
8381 if ($lockfile =~ /^\//) {
8382 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8384 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8389 $main::end_exit_status ||= $?;
8390 if ($$ == $main::initial_process_id) {
8391 # Exiting from initial process
8392 &cleanup_tempnames();
8393 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8394 $main::debug_log_start_module eq &get_module_name()) {
8395 my $len = time() - $main::debug_log_start_time;
8396 &webmin_debug_log("STOP", "runtime=$len");
8397 $main::debug_log_start_time = 0;
8399 if (!$ENV{'SCRIPT_NAME'} &&
8400 $main::initial_module_name eq &get_module_name()) {
8401 # In a command-line script - call the real exit, so that the
8402 # exit status gets properly propogated. In some cases this
8403 # was not happening.
8404 exit($main::end_exit_status);
8409 =head2 month_to_number(month)
8411 Converts a month name like feb to a number like 1.
8416 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8419 =head2 number_to_month(number)
8421 Converts a number like 1 to a month name like Feb.
8426 return ucfirst($number_to_month_map{$_[0]});
8429 =head2 get_rbac_module_acl(user, module)
8431 Returns a hash reference of RBAC overrides ACLs for some user and module.
8432 May return undef if none exist (indicating access denied), or the string *
8433 if full access is granted.
8436 sub get_rbac_module_acl
8438 my ($user, $mod) = @_;
8439 eval "use Authen::SolarisRBAC";
8440 return undef if ($@);
8443 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8444 # Automagic webmin.modulename.admin authorization exists .. allow access
8446 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8447 %rv = ( 'noconfig' => 1 );
8454 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8458 my ($auths, $acls) = split(/\s+/, $_);
8459 my @auths = split(/,/, $auths);
8461 my ($merge) = ($acls =~ s/^\+//);
8463 if ($auths eq "*") {
8464 # These ACLs apply to all RBAC users.
8465 # Only if there is some that match a specific authorization
8466 # later will they be used though.
8469 # Check each of the RBAC authorizations
8470 foreach my $a (@auths) {
8471 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8476 $foundany++ if ($gotall);
8479 # Found an RBAC authorization - return the ACLs
8480 return "*" if ($acls eq "*");
8481 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8483 # Just add to current set
8484 foreach my $a (keys %acl) {
8495 return !$foundany ? undef : %rv ? \%rv : undef;
8498 =head2 supports_rbac([module])
8500 Returns 1 if RBAC client support is available, such as on Solaris.
8505 return 0 if ($gconfig{'os_type'} ne 'solaris');
8506 eval "use Authen::SolarisRBAC";
8509 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8514 =head2 supports_ipv6()
8516 Returns 1 if outgoing IPv6 connections can be made
8521 return $ipv6_module_error ? 0 : 1;
8524 =head2 use_rbac_module_acl(user, module)
8526 Returns 1 if some user should use RBAC to get permissions for a module
8529 sub use_rbac_module_acl
8531 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8532 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8533 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8534 my %access = &get_module_acl($u, $m, 1);
8535 return $access{'rbac'} ? 1 : 0;
8538 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8540 Runs some command, possibly feeding it input and capturing output to the
8541 give files or scalar references. The parameters are :
8543 =item command - Full command to run, possibly including shell meta-characters.
8545 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8547 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8549 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8551 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8553 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8558 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8559 if (&is_readonly_mode() && !$safe) {
8560 print STDERR "Vetoing command $_[0]\n";
8564 $cmd = &translate_command($cmd);
8566 # Use ` operator where possible
8567 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8568 if (!$stdin && ref($stdout) && !$stderr) {
8569 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8570 $$stdout = `$cmd 2>$null_file`;
8573 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8574 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8575 $$stdout = `$cmd 2>&1`;
8578 elsif (!$stdin && !$stdout && !$stderr) {
8579 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8580 return system("$cmd >$null_file 2>$null_file <$null_file");
8584 $| = 1; # needed on some systems to flush before forking
8585 pipe(EXECSTDINr, EXECSTDINw);
8586 pipe(EXECSTDOUTr, EXECSTDOUTw);
8587 pipe(EXECSTDERRr, EXECSTDERRw);
8589 if (!($pid = fork())) {
8593 open(STDIN, "<&EXECSTDINr");
8594 open(STDOUT, ">&EXECSTDOUTw");
8595 if (ref($stderr) && $stderr eq $stdout) {
8596 open(STDERR, ">&EXECSTDOUTw");
8599 open(STDERR, ">&EXECSTDERRw");
8606 my $fullcmd = "($cmd)";
8607 if ($stdin && !ref($stdin)) {
8608 $fullcmd .= " <$stdin";
8610 if ($stdout && !ref($stdout)) {
8611 $fullcmd .= " >$stdout";
8613 if ($stderr && !ref($stderr)) {
8614 if ($stderr eq $stdout) {
8615 $fullcmd .= " 2>&1";
8618 $fullcmd .= " 2>$stderr";
8621 if ($gconfig{'os_type'} eq 'windows') {
8625 exec("/bin/sh", "-c", $fullcmd);
8627 print "Exec failed : $!\n";
8634 # Feed input and capture output
8636 if ($stdin && ref($stdin)) {
8637 print EXECSTDINw $$stdin;
8640 if ($stdout && ref($stdout)) {
8642 while(<EXECSTDOUTr>) {
8647 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8649 while(<EXECSTDERRr>) {
8660 =head2 open_readfile(handle, file)
8662 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8663 exactly the same as Perl's open function.
8668 my ($fh, $file) = @_;
8669 $fh = &callers_package($fh);
8670 my $realfile = &translate_filename($file);
8671 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8672 return open($fh, "<".$realfile);
8675 =head2 open_execute_command(handle, command, output?, safe?)
8677 Runs some command, with the specified file handle set to either write to it if
8678 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8679 indicates if the command modifies the state of the system or not.
8682 sub open_execute_command
8684 my ($fh, $cmd, $mode, $safe) = @_;
8685 $fh = &callers_package($fh);
8686 my $realcmd = &translate_command($cmd);
8687 if (&is_readonly_mode() && !$safe) {
8688 # Don't actually run it
8689 print STDERR "vetoing command $cmd\n";
8692 return open($fh, ">$null_file");
8695 return open($fh, $null_file);
8699 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8700 if ($gconfig{'debug_what_cmd'});
8702 return open($fh, "| $cmd");
8704 elsif ($mode == 1) {
8705 return open($fh, "$cmd 2>$null_file |");
8707 elsif ($mode == 2) {
8708 return open($fh, "$cmd 2>&1 |");
8712 =head2 translate_filename(filename)
8714 Applies all relevant registered translation functions to a filename. Mostly
8715 for internal use, and typically does nothing.
8718 sub translate_filename
8720 my ($realfile) = @_;
8721 my @funcs = grep { $_->[0] eq &get_module_name() ||
8722 !defined($_->[0]) } @main::filename_callbacks;
8723 foreach my $f (@funcs) {
8725 $realfile = &$func($realfile, @{$f->[2]});
8730 =head2 translate_command(filename)
8732 Applies all relevant registered translation functions to a command. Mostly
8733 for internal use, and typically does nothing.
8736 sub translate_command
8739 my @funcs = grep { $_->[0] eq &get_module_name() ||
8740 !defined($_->[0]) } @main::command_callbacks;
8741 foreach my $f (@funcs) {
8743 $realcmd = &$func($realcmd, @{$f->[2]});
8748 =head2 register_filename_callback(module|undef, &function, &args)
8750 Registers some function to be called when the specified module (or all
8751 modules) tries to open a file for reading and writing. The function must
8752 return the actual file to open. This allows you to override which files
8753 other code actually operates on, via the translate_filename function.
8756 sub register_filename_callback
8758 my ($mod, $func, $args) = @_;
8759 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8762 =head2 register_command_callback(module|undef, &function, &args)
8764 Registers some function to be called when the specified module (or all
8765 modules) tries to execute a command. The function must return the actual
8766 command to run. This allows you to override which commands other other code
8767 actually runs, via the translate_command function.
8770 sub register_command_callback
8772 my ($mod, $func, $args) = @_;
8773 push(@main::command_callbacks, [ $mod, $func, $args ]);
8776 =head2 capture_function_output(&function, arg, ...)
8778 Captures output that some function prints to STDOUT, and returns it. Useful
8779 for functions outside your control that print data when you really want to
8780 manipulate it before output.
8783 sub capture_function_output
8785 my ($func, @args) = @_;
8786 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8787 my $old = select(SOCKET1);
8788 my @rv = &$func(@args);
8797 return wantarray ? ($out, \@rv) : $out;
8800 =head2 capture_function_output_tempfile(&function, arg, ...)
8802 Behaves the same as capture_function_output, but uses a temporary file
8803 to avoid buffer full problems.
8806 sub capture_function_output_tempfile
8808 my ($func, @args) = @_;
8809 my $temp = &transname();
8810 open(BUFFER, ">$temp");
8811 my $old = select(BUFFER);
8812 my @rv = &$func(@args);
8815 my $out = &read_file_contents($temp);
8816 &unlink_file($temp);
8817 return wantarray ? ($out, \@rv) : $out;
8820 =head2 modules_chooser_button(field, multiple, [form])
8822 Returns HTML for a button for selecting one or many Webmin modules.
8823 field - Name of the HTML field to place the module names into.
8824 multiple - Set to 1 if multiple modules can be selected.
8825 form - Index of the form on the page.
8828 sub modules_chooser_button
8830 return &theme_modules_chooser_button(@_)
8831 if (defined(&theme_modules_chooser_button));
8832 my $form = defined($_[2]) ? $_[2] : 0;
8833 my $w = $_[1] ? 700 : 500;
8835 if ($_[1] && $gconfig{'db_sizemodules'}) {
8836 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8838 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8839 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8841 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";
8844 =head2 substitute_template(text, &hash)
8846 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8847 the text replaces it with the value of the hash key foo. Also supports blocks
8848 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8849 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8852 sub substitute_template
8854 # Add some extra fixed parameters to the hash
8855 my %hash = %{$_[1]};
8856 $hash{'hostname'} = &get_system_hostname();
8857 $hash{'webmin_config'} = $config_directory;
8858 $hash{'webmin_etc'} = $config_directory;
8859 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8860 $hash{'webmin_var'} = $var_directory;
8862 # Add time-based parameters, for use in DNS
8863 $hash{'current_time'} = time();
8864 my @tm = localtime($hash{'current_time'});
8865 $hash{'current_year'} = $tm[5]+1900;
8866 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8867 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8868 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8869 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8870 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8872 # Actually do the substition
8874 foreach my $s (keys %hash) {
8875 next if ($s eq ''); # Prevent just $ from being subbed
8878 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8879 $rv =~ s/\$\Q$us\E/$sv/g;
8881 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8882 # and ${IF}..${ENDIF} with value
8883 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8884 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8886 # Replace $IF..$ELSE..$ENDIF block with first value,
8887 # and $IF..$ENDIF with value
8888 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8889 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8891 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8892 # matching, nothing if not
8893 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8894 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8896 # Replace $IFEQ..$ENDIFEQ block with first value if
8897 # matching, nothing if not
8898 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8899 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8902 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8903 # and ${IF}..${ENDIF} with nothing
8904 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8905 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8907 # Replace $IF..$ELSE..$ENDIF block with second value,
8908 # and $IF..$ENDIF with nothing
8909 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8910 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8912 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8913 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8914 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8918 # Now assume any $IF blocks whose variables are not present in the hash
8919 # evaluate to false.
8920 # $IF...$ELSE x $ENDIF => x
8921 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8922 # $IF...x...$ENDIF => (nothing)
8923 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8924 # ${var} => (nothing)
8925 $rv =~ s/\$\{[A-Z]+\}//g;
8930 =head2 running_in_zone
8932 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8933 disable module and features that are not appropriate, like those that modify
8934 mounted filesystems.
8939 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8940 $gconfig{'os_version'} < 10);
8941 my $zn = `zonename 2>$null_file`;
8943 return $zn && $zn ne "global";
8946 =head2 running_in_vserver
8948 Returns 1 if the current Webmin instance is running in a Linux VServer.
8949 Used to disable modules and features that are not appropriate.
8952 sub running_in_vserver
8954 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8957 open(MTAB, "/etc/mtab");
8959 my ($dev, $mp) = split(/\s+/, $_);
8960 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8969 =head2 running_in_xen
8971 Returns 1 if Webmin is running inside a Xen instance, by looking
8972 at /proc/xen/capabilities.
8977 return 0 if (!-r "/proc/xen/capabilities");
8978 my $cap = &read_file_contents("/proc/xen/capabilities");
8979 return $cap =~ /control_d/ ? 0 : 1;
8982 =head2 running_in_openvz
8984 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8985 at /proc/vz/veinfo for a non-zero line.
8988 sub running_in_openvz
8990 return 0 if (!-r "/proc/vz/veinfo");
8991 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8992 return 0 if (!$lref || !@$lref);
8993 foreach my $l (@$lref) {
8995 my @ll = split(/\s+/, $l);
8996 return 0 if ($ll[0] eq '0');
9001 =head2 list_categories(&modules, [include-empty])
9003 Returns a hash mapping category codes to names, including any custom-defined
9004 categories. The modules parameter must be an array ref of module hash objects,
9005 as returned by get_all_module_infos.
9010 my ($mods, $empty) = @_;
9011 my (%cats, %catnames);
9012 &read_file("$config_directory/webmin.catnames", \%catnames);
9013 foreach my $o (@lang_order_list) {
9014 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
9019 foreach my $m (@$mods) {
9020 my $c = $m->{'category'};
9021 next if ($cats{$c});
9022 if (defined($catnames{$c})) {
9023 $cats{$c} = $catnames{$c};
9025 elsif ($text{"category_$c"}) {
9026 $cats{$c} = $text{"category_$c"};
9029 # try to get category name from module ..
9030 my %mtext = &load_language($m->{'dir'});
9031 if ($mtext{"category_$c"}) {
9032 $cats{$c} = $mtext{"category_$c"};
9035 $c = $m->{'category'} = "";
9036 $cats{$c} = $text{"category_$c"};
9043 =head2 is_readonly_mode
9045 Returns 1 if the current user is in read-only mode, and thus all writes
9046 to files and command execution should fail.
9049 sub is_readonly_mode
9051 if (!defined($main::readonly_mode_cache)) {
9052 my %gaccess = &get_module_acl(undef, "");
9053 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
9055 return $main::readonly_mode_cache;
9058 =head2 command_as_user(user, with-env?, command, ...)
9060 Returns a command to execute some command as the given user, using the
9061 su statement. If on Linux, the /bin/sh shell is forced in case the user
9062 does not have a valid shell. If with-env is set to 1, the -s flag is added
9063 to the su command to read the user's .profile or .bashrc file.
9068 my ($user, $env, @args) = @_;
9069 my @uinfo = getpwnam($user);
9070 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
9071 # User shell doesn't appear to be valid
9072 if ($gconfig{'os_type'} =~ /-linux$/) {
9073 # Use -s /bin/sh to force it
9074 $shellarg = " -s /bin/sh";
9076 elsif ($gconfig{'os_type'} eq 'freebsd' ||
9077 $gconfig{'os_type'} eq 'solaris' &&
9078 $gconfig{'os_version'} >= 11 ||
9079 $gconfig{'os_type'} eq 'macos') {
9080 # Use -m and force /bin/sh
9081 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
9085 my $rv = "su".($env ? " -" : "").$shellarg.
9086 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
9090 =head2 list_osdn_mirrors(project, file)
9092 This function is now deprecated in favor of letting sourceforge just
9093 redirect to the best mirror, and now just returns their primary download URL.
9096 sub list_osdn_mirrors
9098 my ($project, $file) = @_;
9099 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
9101 'mirror' => 'downloads' } );
9104 =head2 convert_osdn_url(url)
9106 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
9107 or http://prdownloads.sourceforge.net/project/file.zip , convert it
9108 to a real URL on the sourceforge download redirector.
9111 sub convert_osdn_url
9114 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
9115 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
9116 # Always use the Sourceforge mail download URL, which does
9117 # a location-based redirect for us
9118 my ($project, $file) = ($1, $2);
9119 $url = "http://prdownloads.sourceforge.net/sourceforge/".
9121 return wantarray ? ( $url, 0 ) : $url;
9124 # Some other source .. don't change
9125 return wantarray ? ( $url, 2 ) : $url;
9129 =head2 get_current_dir
9131 Returns the directory the current process is running in.
9137 if ($gconfig{'os_type'} eq 'windows') {
9150 =head2 supports_users
9152 Returns 1 if the current OS supports Unix user concepts and functions like
9153 su , getpw* and so on. This will be true on Linux and other Unixes, but false
9159 return $gconfig{'os_type'} ne 'windows';
9162 =head2 supports_symlinks
9164 Returns 1 if the current OS supports symbolic and hard links. This will not
9165 be the case on Windows.
9168 sub supports_symlinks
9170 return $gconfig{'os_type'} ne 'windows';
9173 =head2 quote_path(path)
9175 Returns a path with safe quoting for the current operating system.
9181 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
9182 # Windows only supports "" style quoting
9186 return quotemeta($path);
9190 =head2 get_windows_root
9192 Returns the base windows system directory, like c:/windows.
9195 sub get_windows_root
9197 if ($ENV{'SystemRoot'}) {
9198 my $rv = $ENV{'SystemRoot'};
9203 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
9207 =head2 read_file_contents(file)
9209 Given a filename, returns its complete contents as a string. Effectively
9210 the same as the Perl construct `cat file`.
9213 sub read_file_contents
9215 &open_readfile(FILE, $_[0]) || return undef;
9222 =head2 unix_crypt(password, salt)
9224 Performs Unix encryption on a password, using the built-in crypt function or
9225 the Crypt::UnixCrypt module if the former does not work. The salt parameter
9226 must be either an already-hashed password, or a two-character alpha-numeric
9232 my ($pass, $salt) = @_;
9233 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
9234 my $rv = eval "crypt(\$pass, \$salt)";
9236 return $rv if ($rv && !$@);
9237 eval "use Crypt::UnixCrypt";
9239 return Crypt::UnixCrypt::crypt($pass, $salt);
9242 &error("Failed to encrypt password : $err");
9246 =head2 split_quoted_string(string)
9248 Given a string like I<foo "bar baz" quux>, returns the array :
9252 sub split_quoted_string
9256 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
9257 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
9258 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
9265 =head2 write_to_http_cache(url, file|&data)
9267 Updates the Webmin cache with the contents of the given file, possibly also
9268 clearing out old data. Mainly for internal use by http_download.
9271 sub write_to_http_cache
9273 my ($url, $file) = @_;
9274 return 0 if (!$gconfig{'cache_size'});
9276 # Don't cache downloads that look dynamic
9277 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
9281 # Check if the current module should do caching
9282 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9283 # Caching all except some modules
9284 my @mods = split(/\s+/, $1);
9285 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9287 elsif ($gconfig{'cache_mods'}) {
9288 # Only caching some modules
9289 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9290 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9296 $size = length($$file);
9299 my @st = stat($file);
9303 if ($size > $gconfig{'cache_size'}) {
9304 # Bigger than the whole cache - so don't save it
9309 $cfile = "$main::http_cache_directory/$cfile";
9311 # See how much we have cached currently, clearing old files
9313 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
9314 opendir(CACHEDIR, $main::http_cache_directory);
9315 foreach my $f (readdir(CACHEDIR)) {
9316 next if ($f eq "." || $f eq "..");
9317 my $path = "$main::http_cache_directory/$f";
9318 my @st = stat($path);
9319 if ($gconfig{'cache_days'} &&
9320 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9321 # This file is too old .. trash it
9326 push(@cached, [ $path, $st[7], $st[9] ]);
9330 @cached = sort { $a->[2] <=> $b->[2] } @cached;
9331 while($total+$size > $gconfig{'cache_size'} && @cached) {
9332 # Cache is too big .. delete some files until the new one will fit
9333 unlink($cached[0]->[0]);
9334 $total -= $cached[0]->[1];
9338 # Finally, write out the new file
9340 &open_tempfile(CACHEFILE, ">$cfile");
9341 &print_tempfile(CACHEFILE, $$file);
9342 &close_tempfile(CACHEFILE);
9345 my ($ok, $err) = ©_source_dest($file, $cfile);
9351 =head2 check_in_http_cache(url)
9353 If some URL is in the cache and valid, return the filename for it. Mainly
9354 for internal use by http_download.
9357 sub check_in_http_cache
9360 return undef if (!$gconfig{'cache_size'});
9362 # Check if the current module should do caching
9363 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9364 # Caching all except some modules
9365 my @mods = split(/\s+/, $1);
9366 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9368 elsif ($gconfig{'cache_mods'}) {
9369 # Only caching some modules
9370 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9371 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9376 $cfile = "$main::http_cache_directory/$cfile";
9377 my @st = stat($cfile);
9378 return undef if (!@st || !$st[7]);
9379 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9384 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9389 =head2 supports_javascript
9391 Returns 1 if the current browser is assumed to support javascript.
9394 sub supports_javascript
9396 if (defined(&theme_supports_javascript)) {
9397 return &theme_supports_javascript();
9399 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9402 =head2 get_module_name
9404 Returns the name of the Webmin module that called this function. For internal
9405 use only by other API functions.
9410 return &get_module_variable('$module_name');
9413 =head2 get_module_variable(name, [ref])
9415 Returns the value of some variable which is set in the caller's context, if
9416 using the new WebminCore package. For internal use only.
9419 sub get_module_variable
9421 my ($v, $wantref) = @_;
9422 my $slash = $wantref ? "\\" : "";
9423 my $thispkg = &web_libs_package();
9424 if ($thispkg eq 'WebminCore') {
9425 my ($vt, $vn) = split('', $v, 2);
9427 for(my $i=0; ($callpkg) = caller($i); $i++) {
9428 last if ($callpkg ne $thispkg);
9430 return eval "${slash}${vt}${callpkg}::${vn}";
9432 return eval "${slash}${v}";
9435 =head2 clear_time_locale()
9437 Temporarily force the locale to C, until reset_time_locale is called. This is
9438 useful if your code is going to call C<strftime> from the POSIX package, and
9439 you want to ensure that the output is in a consistent format.
9442 sub clear_time_locale
9444 if ($main::clear_time_locale_count == 0) {
9447 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9448 POSIX::setlocale(POSIX::LC_TIME, "C");
9451 $main::clear_time_locale_count++;
9454 =head2 reset_time_locale()
9456 Revert the locale to whatever it was before clear_time_locale was called
9459 sub reset_time_locale
9461 if ($main::clear_time_locale_count == 1) {
9463 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9464 $main::clear_time_locale_old = undef;
9467 $main::clear_time_locale_count--;
9470 =head2 callers_package(filehandle)
9472 Convert a non-module filehandle like FOO to one qualified with the
9473 caller's caller's package, like fsdump::FOO. For internal use only.
9479 my $callpkg = (caller(1))[0];
9480 my $thispkg = &web_libs_package();
9481 if (!ref($fh) && $fh !~ /::/ &&
9482 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9483 $fh = $callpkg."::".$fh;
9488 =head2 web_libs_package()
9490 Returns the package this code is in. We can't always trust __PACKAGE__. For
9494 sub web_libs_package
9496 if ($called_from_webmin_core) {
9497 return "WebminCore";
9502 =head2 get_userdb_string
9504 Returns the URL-style string for connecting to the users and groups database
9507 sub get_userdb_string
9509 return undef if ($main::no_miniserv_userdb);
9511 &get_miniserv_config(\%miniserv);
9512 return $miniserv{'userdb'};
9515 =head2 connect_userdb(string)
9517 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9518 On failure returns an error message string. In an array context, returns the
9525 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9526 if ($proto eq "mysql") {
9527 # Connect to MySQL with DBI
9528 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9529 $drh || return $text{'sql_emysqldriver'};
9530 my ($host, $port) = split(/:/, $host);
9531 my $cstr = "database=$prefix;host=$host";
9532 $cstr .= ";port=$port" if ($port);
9533 my $dbh = $drh->connect($cstr, $user, $pass, { });
9534 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9535 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9537 elsif ($proto eq "postgresql") {
9538 # Connect to PostgreSQL with DBI
9539 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9540 $drh || return $text{'sql_epostgresqldriver'};
9541 my ($host, $port) = split(/:/, $host);
9542 my $cstr = "dbname=$prefix;host=$host";
9543 $cstr .= ";port=$port" if ($port);
9544 my $dbh = $drh->connect($cstr, $user, $pass);
9545 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9546 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9548 elsif ($proto eq "ldap") {
9549 # Connect with perl LDAP module
9550 eval "use Net::LDAP";
9551 $@ && return $text{'sql_eldapdriver'};
9552 my ($host, $port) = split(/:/, $host);
9553 my $scheme = $args->{'scheme'} || 'ldap';
9555 $port = $scheme eq 'ldaps' ? 636 : 389;
9557 my $ldap = Net::LDAP->new($host,
9559 'scheme' => $scheme);
9560 $ldap || return &text('sql_eldapconnect', $host);
9562 if ($args->{'tls'}) {
9563 # Switch to TLS mode
9564 eval { $mesg = $ldap->start_tls(); };
9565 if ($@ || !$mesg || $mesg->code) {
9566 return &text('sql_eldaptls',
9567 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9570 # Login to the server
9572 $mesg = $ldap->bind(dn => $user, password => $pass);
9575 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9577 if (!$mesg || $mesg->code) {
9578 return &text('sql_eldaplogin', $user,
9579 $mesg ? $mesg->error : "Unknown error");
9581 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9584 return "Unknown protocol $proto";
9588 =head2 disconnect_userdb(string, &handle)
9590 Closes a handle opened by connect_userdb
9593 sub disconnect_userdb
9596 if ($str =~ /^(mysql|postgresql):/) {
9598 if (!$h->{'AutoCommit'}) {
9603 elsif ($str =~ /^ldap:/) {
9610 =head2 split_userdb_string(string)
9612 Converts a string like mysql://user:pass@host/db into separate parts
9615 sub split_userdb_string
9618 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9619 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9620 ($1, $2, $3, $4, $5, $7);
9621 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9622 return ($proto, $user, $pass, $host, $prefix, \%args);
9627 $done_web_lib_funcs = 1;