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'} :
218 $ENV{'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;
1874 if ($gconfig{'os_type'} ne 'windows') {
1875 # On Unix systems, we can restart with a signal
1876 my ($pid, $addr, $i);
1877 $miniserv{'inetd'} && return;
1878 my @oldst = stat($miniserv{'pidfile'});
1879 $pid = $ENV{'MINISERV_PID'};
1881 open(PID, $miniserv{'pidfile'}) ||
1882 &error("Failed to open PID file $miniserv{'pidfile'}");
1885 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1888 # Just signal miniserv to restart
1889 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1891 # Wait till new PID is written, indicating a restart
1892 for($i=0; $i<60; $i++) {
1894 my @newst = stat($miniserv{'pidfile'});
1895 last if ($newst[9] != $oldst[9]);
1897 $i < 60 || &error("Webmin server did not write new PID file");
1899 ## Totally kill the process and re-run it
1900 #$SIG{'TERM'} = 'IGNORE';
1901 #&kill_logged('TERM', $pid);
1902 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1905 # On Windows, we need to use the flag file
1906 open(TOUCH, ">$miniserv{'restartflag'}");
1911 # Wait for miniserv to come back up
1912 my $addr = $miniserv{'bind'} || "127.0.0.1";
1914 for($i=0; $i<20; $i++) {
1917 &open_socket($addr, $miniserv{'port'}, STEST, \$err);
1919 last if (!$err && ++$ok >= 2);
1921 $i < 20 || &error("Failed to restart Webmin server!");
1925 =head2 reload_miniserv
1927 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1928 configuration files. Not all changes will be applied though, such as the
1929 IP addresses and ports to accept connections on.
1934 return undef if (&is_readonly_mode());
1936 &get_miniserv_config(\%miniserv) || return;
1938 if ($gconfig{'os_type'} ne 'windows') {
1939 # Send a USR1 signal to re-read the config
1940 my ($pid, $addr, $i);
1941 $miniserv{'inetd'} && return;
1942 $pid = $ENV{'MINISERV_PID'};
1944 open(PID, $miniserv{'pidfile'}) ||
1945 &error("Failed to open PID file $miniserv{'pidfile'}");
1948 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1950 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1952 # Make sure this didn't kill Webmin!
1954 if (!kill(0, $pid)) {
1955 print STDERR "USR1 signal killed Webmin - restarting\n";
1956 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1960 # On Windows, we need to use the flag file
1961 open(TOUCH, ">$miniserv{'reloadflag'}");
1966 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1968 Returns 1 if some module is supported on the current operating system, or the
1969 OS supplies as parameters. The parameters are :
1971 =item minfo - A hash ref of module information, as returned by get_module_info
1973 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1975 =item os-version - The Webmin OS version to use, such as 13.0
1977 =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.
1980 sub check_os_support
1982 my $oss = $_[0]->{'os_support'};
1983 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1984 # May provide usable API
1985 $oss .= " ".$_[0]->{'api_os_support'};
1987 if ($_[0]->{'nozone'} && &running_in_zone()) {
1988 # Not supported in a Solaris Zone
1991 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1992 # Not supported in a Linux Vserver
1995 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1996 # Not supported in an OpenVZ container
1999 return 1 if (!$oss || $oss eq '*');
2000 my $osver = $_[2] || $gconfig{'os_version'};
2001 my $ostype = $_[1] || $gconfig{'os_type'};
2004 my ($os, $ver, $codes);
2005 my ($neg) = ($oss =~ s/^!//); # starts with !
2006 $anyneg++ if ($neg);
2007 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2009 $os = $1; $ver = $2; $codes = $3; $oss = $4;
2011 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
2013 $os = $1; $ver = $2; $oss = $3;
2015 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2017 $os = $1; $codes = $2; $oss = $3;
2019 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
2021 $codes = $1; $oss = $2;
2023 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
2025 $os = $1; $oss = $2;
2028 next if ($os && !($os eq $ostype ||
2029 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
2030 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
2031 next if ($osver < $1 || $osver > $2);
2033 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
2034 next if ($osver < $1);
2036 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
2037 next if ($osver > $1);
2040 next if ($ver ne $osver);
2042 next if ($codes && !eval $codes);
2048 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2050 Downloads data from a HTTP url to a local file or string. The parameters are :
2052 =item host - The hostname part of the URL, such as www.google.com
2054 =item port - The HTTP port number, such as 80
2056 =item page - The filename part of the URL, like /index.html
2058 =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.
2060 =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.
2062 =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.
2064 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2066 =item user - If set, HTTP authentication is done with this username.
2068 =item pass - The HTTP password to use with the username above.
2070 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2072 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2074 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2076 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2081 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2082 $timeout, $osdn, $nocache, $headers) = @_;
2083 if ($gconfig{'debug_what_net'}) {
2084 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2085 ($user ? " user=$user pass=$pass" : "").
2086 (ref($dest) ? "" : " dest=$dest"));
2089 # Convert OSDN URL first
2090 my $prot = $ssl ? "https://" : "http://";
2091 my $portstr = $ssl && $port == 443 ||
2092 !$ssl && $port == 80 ? "" : ":$port";
2093 ($host, $port, $page, $ssl) = &parse_http_url(
2094 &convert_osdn_url($prot.$host.$portstr.$page));
2097 # Check if we already have cached the URL
2098 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2099 my $cfile = &check_in_http_cache($url);
2100 if ($cfile && !$nocache) {
2101 # Yes! Copy to dest file or variable
2102 &$cbfunc(6, $url) if ($cbfunc);
2104 &open_readfile(CACHEFILE, $cfile);
2106 $$dest = <CACHEFILE>;
2110 ©_source_dest($cfile, $dest);
2117 push(@headers, [ "Host", $host ]);
2118 push(@headers, [ "User-agent", "Webmin" ]);
2119 push(@headers, [ "Accept-language", "en" ]);
2121 my $auth = &encode_base64("$user:$pass");
2122 $auth =~ tr/\r\n//d;
2123 push(@headers, [ "Authorization", "Basic $auth" ]);
2125 foreach my $hname (keys %$headers) {
2126 push(@headers, [ $hname, $headers->{$hname} ]);
2129 # Actually download it
2130 $main::download_timed_out = undef;
2131 local $SIG{ALRM} = \&download_timeout;
2132 alarm($timeout || 60);
2133 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2135 $h = $main::download_timed_out if ($main::download_timed_out);
2137 if ($error) { $$error = $h; return; }
2138 else { &error($h); }
2140 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2141 $headers, $ssl, $nocache);
2142 if ((!$error || !$$error) && !$nocache) {
2143 &write_to_http_cache($url, $dest);
2147 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2149 Do a HTTP download, after the headers have been sent. For internal use only,
2150 typically called by http_download.
2153 sub complete_http_download
2155 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2161 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2162 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2164 if ($_[2]) { ${$_[2]} = $line; return; }
2165 else { &error("Download failed : $line"); }
2168 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2171 $line = &read_http_connection($_[0]);
2172 $line =~ tr/\r\n//d;
2173 $line =~ /^(\S+):\s+(.*)$/ || last;
2174 $header{lc($1)} = $2;
2175 push(@headers, [ lc($1), $2 ]);
2178 if ($main::download_timed_out) {
2179 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2180 else { &error($main::download_timed_out); }
2182 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2183 if ($rcode >= 300 && $rcode < 400) {
2184 # follow the redirect
2185 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2186 my ($host, $port, $page, $ssl);
2187 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2188 $ssl = $1 eq 'https' ? 1 : 0;
2189 $host = $2; $port = $3; $page = $4 || "/";
2191 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2192 $ssl = $1 eq 'https' ? 1 : 0;
2193 $host = $2; $port = 80; $page = $3 || "/";
2195 elsif ($header{'location'} =~ /^\// && $_[5]) {
2196 # Relative to same server
2200 $page = $header{'location'};
2202 elsif ($header{'location'}) {
2203 # Assume relative to same dir .. not handled
2204 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2205 else { &error("Invalid Location header $header{'location'}"); }
2208 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2209 else { &error("Missing Location header"); }
2212 ($page, $params) = split(/\?/, $page);
2214 $page .= "?".$params if (defined($params));
2215 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2216 undef, undef, undef, $_[4], $_[9], $_[7]);
2221 # Append to a variable
2222 while(defined($buf = &read_http_connection($_[0], 1024))) {
2224 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2230 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2231 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2232 else { &error("Failed to write to $_[1] : $!"); }
2234 binmode(PFILE); # For windows
2235 while(defined($buf = &read_http_connection($_[0], 1024))) {
2236 &print_tempfile(PFILE, $buf);
2237 $got += length($buf);
2238 &$cbfunc(3, $got) if ($cbfunc);
2240 &close_tempfile(PFILE);
2241 if ($header{'content-length'} &&
2242 $got != $header{'content-length'}) {
2243 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2244 else { &error("Download incomplete"); }
2247 &$cbfunc(4) if ($cbfunc);
2249 &close_http_connection($_[0]);
2253 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2255 Download data from an FTP site to a local file. The parameters are :
2257 =item host - FTP server hostname
2259 =item file - File on the FTP server to download
2261 =item destfile - File on the Webmin system to download data to
2263 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2265 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2267 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2269 =item pass - Password for the username above.
2271 =item port - FTP server port number, which defaults to 21 if not set.
2276 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2278 if ($gconfig{'debug_what_net'}) {
2279 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2280 ($user ? " user=$user pass=$pass" : "").
2281 (ref($dest) ? "" : " dest=$dest"));
2285 if (&is_readonly_mode()) {
2286 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2288 else { &error("FTP connections not allowed in readonly mode"); }
2291 # Check if we already have cached the URL
2292 my $url = "ftp://".$host.$file;
2293 my $cfile = &check_in_http_cache($url);
2295 # Yes! Copy to dest file or variable
2296 &$cbfunc(6, $url) if ($cbfunc);
2298 &open_readfile(CACHEFILE, $cfile);
2300 $$dest = <CACHEFILE>;
2304 ©_source_dest($cfile, $dest);
2309 # Actually download it
2310 $main::download_timed_out = undef;
2311 local $SIG{ALRM} = \&download_timeout;
2314 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2315 # download through http-style proxy
2317 if (&open_socket($1, $2, "SOCK", \$error)) {
2319 if ($main::download_timed_out) {
2321 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2322 else { &error($main::download_timed_out); }
2324 my $esc = $_[1]; $esc =~ s/ /%20/g;
2325 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2326 my $portstr = $port == 21 ? "" : ":$port";
2327 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2328 print SOCK "User-agent: Webmin\r\n";
2329 if ($gconfig{'proxy_user'}) {
2330 my $auth = &encode_base64(
2331 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2332 $auth =~ tr/\r\n//d;
2333 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2336 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2339 elsif (!$gconfig{'proxy_fallback'}) {
2341 if ($error) { $$error = $main::download_timed_out; return 0; }
2342 else { &error($main::download_timed_out); }
2347 # connect to host and login with real FTP protocol
2348 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2350 if ($main::download_timed_out) {
2351 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2352 else { &error($main::download_timed_out); }
2354 &ftp_command("", 2, $_[3]) || return 0;
2356 # Login as supplied user
2357 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2359 if (int($urv[1]/100) == 3) {
2360 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2364 # Login as anonymous
2365 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2367 if (int($urv[1]/100) == 3) {
2368 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2372 &$cbfunc(1, 0) if ($cbfunc);
2375 # get the file size and tell the callback
2376 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2377 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2378 defined($size) || return 0;
2380 &$cbfunc(2, int($size));
2384 my $pasv = &ftp_command("PASV", 2, $_[3]);
2385 defined($pasv) || return 0;
2386 $pasv =~ /\(([0-9,]+)\)/;
2387 @n = split(/,/ , $1);
2388 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2389 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2390 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2394 &open_tempfile(PFILE, ">$_[2]", 1);
2395 while(read(CON, $buf, 1024) > 0) {
2396 &print_tempfile(PFILE, $buf);
2397 $got += length($buf);
2398 &$cbfunc(3, $got) if ($cbfunc);
2400 &close_tempfile(PFILE);
2402 if ($got != $size) {
2403 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2404 else { &error("Download incomplete"); }
2406 &$cbfunc(4) if ($cbfunc);
2408 &ftp_command("", 2, $_[3]) || return 0;
2412 &ftp_command("QUIT", 2, $_[3]) || return 0;
2416 &write_to_http_cache($url, $dest);
2420 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2422 Upload data from a local file to an FTP site. The parameters are :
2424 =item host - FTP server hostname
2426 =item file - File on the FTP server to write to
2428 =item srcfile - File on the Webmin system to upload data from
2430 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2432 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2434 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2436 =item pass - Password for the username above.
2438 =item port - FTP server port number, which defaults to 21 if not set.
2445 if (&is_readonly_mode()) {
2446 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2448 else { &error("FTP connections not allowed in readonly mode"); }
2451 $main::download_timed_out = undef;
2452 local $SIG{ALRM} = \&download_timeout;
2455 # connect to host and login
2456 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2458 if ($main::download_timed_out) {
2459 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2460 else { &error($main::download_timed_out); }
2462 &ftp_command("", 2, $_[3]) || return 0;
2464 # Login as supplied user
2465 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2467 if (int($urv[1]/100) == 3) {
2468 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2472 # Login as anonymous
2473 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2475 if (int($urv[1]/100) == 3) {
2476 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2480 &$cbfunc(1, 0) if ($cbfunc);
2482 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2484 # get the file size and tell the callback
2485 my @st = stat($_[2]);
2487 &$cbfunc(2, $st[7]);
2491 my $pasv = &ftp_command("PASV", 2, $_[3]);
2492 defined($pasv) || return 0;
2493 $pasv =~ /\(([0-9,]+)\)/;
2494 @n = split(/,/ , $1);
2495 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2496 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2501 while(read(PFILE, $buf, 1024) > 0) {
2503 $got += length($buf);
2504 &$cbfunc(3, $got) if ($cbfunc);
2508 if ($got != $st[7]) {
2509 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2510 else { &error("Upload incomplete"); }
2512 &$cbfunc(4) if ($cbfunc);
2515 &ftp_command("", 2, $_[3]) || return 0;
2516 &ftp_command("QUIT", 2, $_[3]) || return 0;
2522 =head2 no_proxy(host)
2524 Checks if some host is on the no proxy list. For internal use by the
2525 http_download and ftp_download functions.
2530 my $ip = &to_ipaddress($_[0]);
2531 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2532 return 1 if ($_[0] =~ /\Q$n\E/ ||
2538 =head2 open_socket(host, port, handle, [&error])
2540 Open a TCP connection to some host and port, using a file handle. The
2543 =item host - Hostname or IP address to connect to.
2545 =item port - TCP port number.
2547 =item handle - A file handle name to use for the connection.
2549 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2554 my ($host, $port, $fh, $err) = @_;
2555 $fh = &callers_package($fh);
2557 if ($gconfig{'debug_what_net'}) {
2558 &webmin_debug_log('TCP', "host=$host port=$port");
2561 # Lookup IP address for the host. Try v4 first, and failing that v6
2563 my $proto = getprotobyname("tcp");
2564 if ($ip = &to_ipaddress($host)) {
2565 # Create IPv4 socket and connection
2566 if (!socket($fh, PF_INET(), SOCK_STREAM, $proto)) {
2567 my $msg = "Failed to create socket : $!";
2568 if ($err) { $$err = $msg; return 0; }
2569 else { &error($msg); }
2571 my $addr = inet_aton($ip);
2572 if ($gconfig{'bind_proxy'}) {
2573 # BIND to outgoing IP
2574 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2575 my $msg = "Failed to bind to source address : $!";
2576 if ($err) { $$err = $msg; return 0; }
2577 else { &error($msg); }
2580 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2581 my $msg = "Failed to connect to $host:$port : $!";
2582 if ($err) { $$err = $msg; return 0; }
2583 else { &error($msg); }
2586 elsif ($ip = &to_ip6address($host)) {
2587 # Create IPv6 socket and connection
2588 if (!&supports_ipv6()) {
2589 $msg = "IPv6 connections are not supported";
2590 if ($err) { $$err = $msg; return 0; }
2591 else { &error($msg); }
2593 if (!socket($fh, Socket6::PF_INET6(), SOCK_STREAM, $proto)) {
2594 my $msg = "Failed to create IPv6 socket : $!";
2595 if ($err) { $$err = $msg; return 0; }
2596 else { &error($msg); }
2598 my $addr = inet_pton(Socket6::AF_INET6(), $ip);
2599 if (!connect($fh, pack_sockaddr_in6($port, $addr))) {
2600 my $msg = "Failed to IPv6 connect to $host:$port : $!";
2601 if ($err) { $$err = $msg; return 0; }
2602 else { &error($msg); }
2607 my $msg = "Failed to lookup IP address for $host";
2608 if ($err) { $$err = $msg; return 0; }
2609 else { &error($msg); }
2613 my $old = select($fh);
2619 =head2 download_timeout
2621 Called when a download times out. For internal use only.
2624 sub download_timeout
2626 $main::download_timed_out = "Download timed out";
2629 =head2 ftp_command(command, expected, [&error], [filehandle])
2631 Send an FTP command, and die if the reply is not what was expected. Mainly
2632 for internal use by the ftp_download and ftp_upload functions.
2637 my ($cmd, $expect, $err, $fh) = @_;
2639 $fh = &callers_package($fh);
2642 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2644 print $fh "$cmd\r\n";
2647 if (!($line = <$fh>)) {
2649 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2650 else { &error("Failed to read reply to $what"); }
2652 $line =~ /^(...)(.)(.*)$/;
2655 foreach my $c (@$expect) {
2656 $found++ if (int($1/100) == $c);
2660 $found++ if (int($1/100) == $_[1]);
2664 if ($err) { $$err = "$what failed : $3"; return undef; }
2665 else { &error("$what failed : $3"); }
2670 # Need to skip extra stuff..
2672 if (!($line = <$fh>)) {
2674 if ($$err) { $$err = "Failed to read reply to $what";
2676 else { &error("Failed to read reply to $what"); }
2678 $line =~ /^(....)(.*)$/; $reply .= $2;
2679 if ($1 eq "$rcode ") { last; }
2683 return wantarray ? ($reply, $rcode) : $reply;
2686 =head2 to_ipaddress(hostname)
2688 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2689 it cannot be resolved.
2694 if (&check_ipaddress($_[0])) {
2695 return $_[0]; # Already in v4 format
2697 elsif (&check_ip6address($_[0])) {
2698 return undef; # A v6 address cannot be converted to v4
2701 my $hn = gethostbyname($_[0]);
2702 return undef if (!$hn);
2703 local @ip = unpack("CCCC", $hn);
2704 return join("." , @ip);
2708 =head2 to_ip6address(hostname)
2710 Converts a hostname to IPv6 address, or returns undef if it cannot be resolved.
2715 if (&check_ip6address($_[0])) {
2716 return $_[0]; # Already in v6 format
2718 elsif (&check_ipaddress($_[0])) {
2719 return undef; # A v4 address cannot be v6
2721 elsif (!&supports_ipv6()) {
2722 return undef; # Cannot lookup
2725 # Perform IPv6 DNS lookup
2727 (undef, undef, undef, $inaddr) =
2728 getaddrinfo($_[0], undef, Socket6::AF_INET6(), SOCK_STREAM);
2729 return undef if (!$inaddr);
2731 (undef, $addr) = unpack_sockaddr_in6($inaddr);
2732 return inet_ntop(Socket6::AF_INET6(), $addr);
2736 =head2 to_hostname(ipv4|ipv6-address)
2738 Reverse-resolves an IPv4 or 6 address to a hostname
2744 if (&check_ip6address($addr) && &supports_ipv6()) {
2745 return gethostbyaddr(inet_pton(Socket6::AF_INET6(), $addr),
2746 Socket6::AF_INET6());
2749 return gethostbyaddr(inet_aton($addr), AF_INET);
2753 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2755 Renders a 4-column table of icons. The useful parameters are :
2757 =item links - An array ref of link destination URLs for the icons.
2759 =item titles - An array ref of titles to appear under the icons.
2761 =item icons - An array ref of URLs for icon images.
2763 =item columns - Number of columns to layout the icons with. Defaults to 4.
2768 &load_theme_library();
2769 if (defined(&theme_icons_table)) {
2770 &theme_icons_table(@_);
2774 my $cols = $_[3] ? $_[3] : 4;
2775 my $per = int(100.0 / $cols);
2776 print "<table class='icons_table' width=100% cellpadding=5>\n";
2777 for(my $i=0; $i<@{$_[0]}; $i++) {
2778 if ($i%$cols == 0) { print "<tr>\n"; }
2779 print "<td width=$per% align=center valign=top>\n";
2780 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2781 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2782 $_[7]->[$i], $_[8]->[$i]);
2784 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2786 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2787 print "</tr>\n" if ($need_tr);
2791 =head2 replace_file_line(file, line, [newline]*)
2793 Replaces one line in some file with 0 or more new lines. The parameters are :
2795 =item file - Full path to some file, like /etc/hosts.
2797 =item line - Line number to replace, starting from 0.
2799 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2802 sub replace_file_line
2805 my $realfile = &translate_filename($_[0]);
2806 open(FILE, $realfile);
2809 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2810 else { splice(@lines, $_[1], 1); }
2811 &open_tempfile(FILE, ">$realfile");
2812 &print_tempfile(FILE, @lines);
2813 &close_tempfile(FILE);
2816 =head2 read_file_lines(file, [readonly])
2818 Returns a reference to an array containing the lines from some file. This
2819 array can be modified, and will be written out when flush_file_lines()
2820 is called. The parameters are :
2822 =item file - Full path to the file to read.
2824 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2828 $lref = read_file_lines("/etc/hosts");
2829 push(@$lref, "127.0.0.1 localhost");
2830 flush_file_lines("/etc/hosts");
2836 my ($package, $filename, $line) = caller;
2837 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2839 my $realfile = &translate_filename($_[0]);
2840 if (!$main::file_cache{$realfile}) {
2843 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2844 open(READFILE, $realfile);
2847 $eol = /\r\n$/ ? "\r\n" : "\n";
2853 $main::file_cache{$realfile} = \@lines;
2854 $main::file_cache_noflush{$realfile} = $_[1];
2855 $main::file_cache_eol{$realfile} = $eol || "\n";
2858 # Make read-write if currently readonly
2860 $main::file_cache_noflush{$realfile} = 0;
2863 return $main::file_cache{$realfile};
2866 =head2 flush_file_lines([file], [eol])
2868 Write out to a file previously read by read_file_lines to disk (except
2869 for those marked readonly). The parameters are :
2871 =item file - The file to flush out.
2873 =item eof - End-of-line character for each line. Defaults to \n.
2876 sub flush_file_lines
2880 local $trans = &translate_filename($_[0]);
2881 $main::file_cache{$trans} ||
2882 &error("flush_file_lines called on non-loaded file $trans");
2883 push(@files, $trans);
2886 @files = ( keys %main::file_cache );
2888 foreach my $f (@files) {
2889 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2890 if (!$main::file_cache_noflush{$f}) {
2891 no warnings; # XXX Bareword file handles should go away
2892 &open_tempfile(FLUSHFILE, ">$f");
2893 foreach my $line (@{$main::file_cache{$f}}) {
2894 (print FLUSHFILE $line,$eol) ||
2895 &error(&text("efilewrite", $f, $!));
2897 &close_tempfile(FLUSHFILE);
2899 delete($main::file_cache{$f});
2900 delete($main::file_cache_noflush{$f});
2904 =head2 unflush_file_lines(file)
2906 Clear the internal cache of some given file, previously read by read_file_lines.
2909 sub unflush_file_lines
2911 my $realfile = &translate_filename($_[0]);
2912 delete($main::file_cache{$realfile});
2913 delete($main::file_cache_noflush{$realfile});
2916 =head2 unix_user_input(fieldname, user, [form])
2918 Returns HTML for an input to select a Unix user. By default this is a text
2919 box with a user popup button next to it.
2924 if (defined(&theme_unix_user_input)) {
2925 return &theme_unix_user_input(@_);
2927 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2928 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2931 =head2 unix_group_input(fieldname, user, [form])
2933 Returns HTML for an input to select a Unix group. By default this is a text
2934 box with a group popup button next to it.
2937 sub unix_group_input
2939 if (defined(&theme_unix_group_input)) {
2940 return &theme_unix_group_input(@_);
2942 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2943 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2946 =head2 hlink(text, page, [module], [width], [height])
2948 Returns HTML for a link that when clicked on pops up a window for a Webmin
2949 help page. The parameters are :
2951 =item text - Text for the link.
2953 =item page - Help page code, such as 'intro'.
2955 =item module - Module the help page is in. Defaults to the current module.
2957 =item width - Width of the help popup window. Defaults to 600 pixels.
2959 =item height - Height of the help popup window. Defaults to 400 pixels.
2961 The actual help pages are in each module's help sub-directory, in files with
2967 if (defined(&theme_hlink)) {
2968 return &theme_hlink(@_);
2970 my $mod = $_[2] ? $_[2] : &get_module_name();
2971 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2972 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2973 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>";
2976 =head2 user_chooser_button(field, multiple, [form])
2978 Returns HTML for a javascript button for choosing a Unix user or users.
2979 The parameters are :
2981 =item field - Name of the HTML field to place the username into.
2983 =item multiple - Set to 1 if multiple users can be selected.
2985 =item form - Index of the form on the page.
2988 sub user_chooser_button
2990 return undef if (!&supports_users());
2991 return &theme_user_chooser_button(@_)
2992 if (defined(&theme_user_chooser_button));
2993 my $form = defined($_[2]) ? $_[2] : 0;
2994 my $w = $_[1] ? 500 : 300;
2996 if ($_[1] && $gconfig{'db_sizeusers'}) {
2997 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2999 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3000 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3002 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";
3005 =head2 group_chooser_button(field, multiple, [form])
3007 Returns HTML for a javascript button for choosing a Unix group or groups
3008 The parameters are :
3010 =item field - Name of the HTML field to place the group name into.
3012 =item multiple - Set to 1 if multiple groups can be selected.
3014 =item form - Index of the form on the page.
3017 sub group_chooser_button
3019 return undef if (!&supports_users());
3020 return &theme_group_chooser_button(@_)
3021 if (defined(&theme_group_chooser_button));
3022 my $form = defined($_[2]) ? $_[2] : 0;
3023 my $w = $_[1] ? 500 : 300;
3025 if ($_[1] && $gconfig{'db_sizeusers'}) {
3026 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3028 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3029 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3031 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";
3034 =head2 foreign_check(module, [api-only])
3036 Checks if some other module exists and is supported on this OS. The parameters
3039 =item module - Name of the module to check.
3041 =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.
3046 my ($mod, $api) = @_;
3048 my $mdir = &module_root_directory($mod);
3049 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
3050 return &check_os_support(\%minfo, undef, undef, $api);
3053 =head2 foreign_exists(module)
3055 Checks if some other module exists. The module parameter is the short module
3061 my $mdir = &module_root_directory($_[0]);
3062 return -r "$mdir/module.info";
3065 =head2 foreign_available(module)
3067 Returns 1 if some module is installed, and acessible to the current user. The
3068 module parameter is the module directory name.
3071 sub foreign_available
3073 return 0 if (!&foreign_check($_[0]) &&
3074 !$gconfig{'available_even_if_no_support'});
3075 my %foreign_module_info = &get_module_info($_[0]);
3077 # Check list of allowed modules
3079 &read_acl(\%acl, undef, [ $base_remote_user ]);
3080 return 0 if (!$acl{$base_remote_user,$_[0]} &&
3081 !$acl{$base_remote_user,'*'});
3083 # Check for usermod restrictions
3084 my @usermods = &list_usermods();
3085 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
3087 if (&get_product_name() eq "webmin") {
3088 # Check if the user has any RBAC privileges in this module
3089 if (&supports_rbac($_[0]) &&
3090 &use_rbac_module_acl(undef, $_[0])) {
3091 # RBAC is enabled for this user and module - check if he
3093 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
3094 return 0 if (!$rbacs);
3096 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
3097 # If denying access to modules not specifically allowed by
3098 # RBAC, then prevent access
3103 # Check readonly support
3104 if (&is_readonly_mode()) {
3105 return 0 if (!$foreign_module_info{'readonly'});
3108 # Check if theme vetos
3109 if (defined(&theme_foreign_available)) {
3110 return 0 if (!&theme_foreign_available($_[0]));
3113 # Check if licence module vetos
3114 if ($main::licence_module) {
3115 return 0 if (!&foreign_call($main::licence_module,
3116 "check_module_licence", $_[0]));
3122 =head2 foreign_require(module, [file], [package])
3124 Brings in functions from another module, and places them in the Perl namespace
3125 with the same name as the module. The parameters are :
3127 =item module - The source module's directory name, like sendmail.
3129 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
3131 =item package - Perl package to place the module's functions and global variables in.
3133 If the original module name contains dashes, they will be replaced with _ in
3139 my ($mod, $file, $pkg) = @_;
3140 $pkg ||= $mod || "global";
3141 $pkg =~ s/[^A-Za-z0-9]/_/g;
3144 push(@files, $file);
3148 my %minfo = &get_module_info($mod);
3149 if ($minfo{'library'}) {
3150 @files = split(/\s+/, $minfo{'library'});
3153 @files = ( $mod."-lib.pl" );
3156 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3157 return 1 if (!@files);
3158 foreach my $f (@files) {
3159 $main::done_foreign_require{$pkg,$f}++;
3162 my $mdir = &module_root_directory($mod);
3163 @INC = &unique($mdir, @INC);
3164 -d $mdir || &error("Module $mod does not exist");
3165 if (!&get_module_name() && $mod) {
3168 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3169 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3170 my $code = "package $pkg; ".
3171 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3172 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3173 foreach my $f (@files) {
3174 $code .= "do '$mdir/$f' || die \$@; ";
3177 if (defined($old_fmn)) {
3178 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3181 delete($ENV{'FOREIGN_MODULE_NAME'});
3183 if (defined($old_frd)) {
3184 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3187 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3190 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3194 =head2 foreign_call(module, function, [arg]*)
3196 Call a function in another module. The module parameter is the target module
3197 directory name, function is the perl sub to call, and the remaining parameters
3198 are the arguments. However, unless you need to call a function whose name
3199 is dynamic, it is better to use Perl's cross-module function call syntax
3200 like module::function(args).
3205 my $pkg = $_[0] || "global";
3206 $pkg =~ s/[^A-Za-z0-9]/_/g;
3207 my @args = @_[2 .. @_-1];
3208 $main::foreign_args = \@args;
3209 my @rv = eval <<EOF;
3211 &$_[1](\@{\$main::foreign_args});
3213 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3214 return wantarray ? @rv : $rv[0];
3217 =head2 foreign_config(module, [user-config])
3219 Get the configuration from another module, and return it as a hash. If the
3220 user-config parameter is set to 1, returns the Usermin user-level preferences
3221 for the current user instead.
3226 my ($mod, $uc) = @_;
3229 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3230 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3231 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3234 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3239 =head2 foreign_installed(module, mode)
3241 Checks if the server for some module is installed, and possibly also checks
3242 if the module has been configured by Webmin.
3243 For mode 1, returns 2 if the server is installed and configured for use by
3244 Webmin, 1 if installed but not configured, or 0 otherwise.
3245 For mode 0, returns 1 if installed, 0 if not.
3246 If the module does not provide an install_check.pl script, assumes that
3247 the server is installed.
3250 sub foreign_installed
3252 my ($mod, $configured) = @_;
3253 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3255 return $main::foreign_installed_cache{$mod,$configured};
3259 if (!&foreign_check($mod)) {
3264 my $mdir = &module_root_directory($mod);
3265 if (!-r "$mdir/install_check.pl") {
3266 # Not known, assume OK
3267 $rv = $configured ? 2 : 1;
3270 # Call function to check
3271 &foreign_require($mod, "install_check.pl");
3272 $rv = &foreign_call($mod, "is_installed", $configured);
3275 $main::foreign_installed_cache{$mod,$configured} = $rv;
3280 =head2 foreign_defined(module, function)
3282 Returns 1 if some function is defined in another module. In general, it is
3283 simpler to use the syntax &defined(module::function) instead.
3289 $pkg =~ s/[^A-Za-z0-9]/_/g;
3290 my $func = "${pkg}::$_[1]";
3291 return defined(&$func);
3294 =head2 get_system_hostname([short], [skip-file])
3296 Returns the hostname of this system. If the short parameter is set to 1,
3297 then the domain name is not prepended - otherwise, Webmin will attempt to get
3298 the fully qualified hostname, like foo.example.com.
3301 sub get_system_hostname
3304 my $skipfile = $_[1];
3305 if (!$main::get_system_hostname[$m]) {
3306 if ($gconfig{'os_type'} ne 'windows') {
3307 # Try some common Linux hostname files first
3310 # Never get from file
3312 elsif ($gconfig{'os_type'} eq 'redhat-linux') {
3314 &read_env_file("/etc/sysconfig/network", \%nc);
3315 if ($nc{'HOSTNAME'}) {
3316 $fromfile = $nc{'HOSTNAME'};
3319 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3320 my $hn = &read_file_contents("/etc/hostname");
3326 elsif ($gconfig{'os_type'} eq 'open-linux') {
3327 my $hn = &read_file_contents("/etc/HOSTNAME");
3333 elsif ($gconfig{'os_type'} eq 'solaris') {
3334 my $hn = &read_file_contents("/etc/nodename");
3341 # If we found a hostname in a file, use it
3342 if ($fromfile && ($m || $fromfile =~ /\./)) {
3344 $fromfile =~ s/\..*$//;
3346 $main::get_system_hostname[$m] = $fromfile;
3350 # Can use hostname command on Unix
3351 &execute_command("hostname", undef,
3352 \$main::get_system_hostname[$m], undef, 0, 1);
3353 chop($main::get_system_hostname[$m]);
3355 eval "use Sys::Hostname";
3357 $main::get_system_hostname[$m] = eval "hostname()";
3359 if ($@ || !$main::get_system_hostname[$m]) {
3360 $main::get_system_hostname[$m] = "UNKNOWN";
3363 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3364 $gconfig{'os_type'} =~ /linux$/ &&
3365 !$gconfig{'no_hostname_f'} && !$_[0]) {
3366 # Try with -f flag to get fully qualified name
3368 my $ex = &execute_command("hostname -f", undef, \$flag,
3371 if ($ex || $flag eq "") {
3372 # -f not supported! We have probably set the
3373 # hostname to just '-f'. Fix the problem
3376 &execute_command("hostname ".
3377 quotemeta($main::get_system_hostname[$m]),
3378 undef, undef, undef, 0, 1);
3382 $main::get_system_hostname[$m] = $flag;
3387 # On Windows, try computername environment variable
3388 return $ENV{'computername'} if ($ENV{'computername'});
3389 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3391 # Fall back to net name command
3392 my $out = `net name 2>&1`;
3393 if ($out =~ /\-+\r?\n(\S+)/) {
3394 $main::get_system_hostname[$m] = $1;
3397 $main::get_system_hostname[$m] = "windows";
3401 return $main::get_system_hostname[$m];
3404 =head2 get_webmin_version
3406 Returns the version of Webmin currently being run, such as 1.450.
3409 sub get_webmin_version
3411 if (!$get_webmin_version) {
3412 open(VERSION, "$root_directory/version") || return 0;
3413 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3416 return $get_webmin_version;
3419 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3421 Returns a hash containing access control options for the given user and module.
3422 By default the current username and module name are used. If the no-rbac flag
3423 is given, the permissions will not be updated based on the user's RBAC role
3424 (as seen on Solaris). If the no-default flag is given, default permissions for
3425 the module will not be included.
3430 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3431 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3432 my $mdir = &module_root_directory($m);
3435 # Read default ACL first, to be overridden by per-user settings
3436 &read_file_cached("$mdir/defaultacl", \%rv);
3438 # If this isn't a master admin user, apply the negative permissions
3439 # so that he doesn't un-expectedly gain access to new features
3441 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3442 if ($gaccess{'negative'}) {
3443 &read_file_cached("$mdir/negativeacl", \%rv);
3447 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3448 # RBAC overrides exist for this user in this module
3449 my $rbac = &get_rbac_module_acl(
3450 defined($_[0]) ? $_[0] : $remote_user, $m);
3451 foreach my $r (keys %$rbac) {
3452 $rv{$r} = $rbac->{$r};
3455 elsif ($gconfig{"risk_$u"} && $m) {
3456 # ACL is defined by user's risk level
3457 my $rf = $gconfig{"risk_$u"}.'.risk';
3458 &read_file_cached("$mdir/$rf", \%rv);
3460 my $sf = $gconfig{"skill_$u"}.'.skill';
3461 &read_file_cached("$mdir/$sf", \%rv);
3464 # Use normal Webmin ACL, if a user is set
3465 my $userdb = &get_userdb_string();
3467 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3468 # Look for this user in the user/group DB, if one is defined
3469 # and if the user might be in the DB
3470 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3471 ref($dbh) || &error(&text('euserdbacl', $dbh));
3472 if ($proto eq "mysql" || $proto eq "postgresql") {
3473 # Find the user in the SQL DB
3474 my $cmd = $dbh->prepare(
3475 "select id from webmin_user where name = ?");
3476 $cmd && $cmd->execute($u) ||
3477 &error(&text('euserdbacl', $dbh->errstr));
3478 my ($id) = $cmd->fetchrow();
3479 $foundindb = 1 if (defined($id));
3482 # Fetch ACLs with SQL
3484 my $cmd = $dbh->prepare(
3485 "select attr,value from webmin_user_acl ".
3486 "where id = ? and module = ?");
3487 $cmd && $cmd->execute($id, $m) ||
3488 &error(&text('euserdbacl', $dbh->errstr));
3489 while(my ($a, $v) = $cmd->fetchrow()) {
3495 elsif ($proto eq "ldap") {
3497 my $rv = $dbh->search(
3499 filter => '(&(cn='.$u.')(objectClass='.
3500 $args->{'userclass'}.'))',
3502 if (!$rv || $rv->code) {
3503 &error(&text('euserdbacl',
3504 $rv ? $rv->error : "Unknown error"));
3506 my ($user) = $rv->all_entries;
3508 # Find ACL sub-object for the module
3509 my $ldapm = $m || "global";
3511 my $rv = $dbh->search(
3512 base => $user->dn(),
3513 filter => '(cn='.$ldapm.')',
3515 if (!$rv || $rv->code) {
3516 &error(&text('euserdbacl',
3517 $rv ? $rv->error : "Unknown error"));
3519 my ($acl) = $rv->all_entries;
3521 foreach my $av ($acl->get_value(
3522 'webminAclEntry')) {
3523 my ($a, $v) = split(/=/, $av,2);
3529 &disconnect_userdb($userdb, $dbh);
3533 # Read from local files
3534 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3535 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3537 "$config_directory/$m/$remote_user.acl",\%rv);
3541 if ($tconfig{'preload_functions'}) {
3542 &load_theme_library();
3544 if (defined(&theme_get_module_acl)) {
3545 %rv = &theme_get_module_acl($u, $m, \%rv);
3550 =head2 get_group_module_acl(group, [module], [no-default])
3552 Returns the ACL for a Webmin group, in an optional module (which defaults to
3553 the current module).
3556 sub get_group_module_acl
3559 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3560 my $mdir = &module_root_directory($m);
3563 &read_file_cached("$mdir/defaultacl", \%rv);
3566 my $userdb = &get_userdb_string();
3569 # Look for this group in the user/group DB
3570 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3571 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3572 if ($proto eq "mysql" || $proto eq "postgresql") {
3573 # Find the group in the SQL DB
3574 my $cmd = $dbh->prepare(
3575 "select id from webmin_group where name = ?");
3576 $cmd && $cmd->execute($g) ||
3577 &error(&text('egroupdbacl', $dbh->errstr));
3578 my ($id) = $cmd->fetchrow();
3579 $foundindb = 1 if (defined($id));
3582 # Fetch ACLs with SQL
3584 my $cmd = $dbh->prepare(
3585 "select attr,value from webmin_group_acl ".
3586 "where id = ? and module = ?");
3587 $cmd && $cmd->execute($id, $m) ||
3588 &error(&text('egroupdbacl', $dbh->errstr));
3589 while(my ($a, $v) = $cmd->fetchrow()) {
3595 elsif ($proto eq "ldap") {
3596 # Find group in LDAP
3597 my $rv = $dbh->search(
3599 filter => '(&(cn='.$g.')(objectClass='.
3600 $args->{'groupclass'}.'))',
3602 if (!$rv || $rv->code) {
3603 &error(&text('egroupdbacl',
3604 $rv ? $rv->error : "Unknown error"));
3606 my ($group) = $rv->all_entries;
3608 # Find ACL sub-object for the module
3609 my $ldapm = $m || "global";
3611 my $rv = $dbh->search(
3612 base => $group->dn(),
3613 filter => '(cn='.$ldapm.')',
3615 if (!$rv || $rv->code) {
3616 &error(&text('egroupdbacl',
3617 $rv ? $rv->error : "Unknown error"));
3619 my ($acl) = $rv->all_entries;
3621 foreach my $av ($acl->get_value(
3622 'webminAclEntry')) {
3623 my ($a, $v) = split(/=/, $av, 2);
3629 &disconnect_userdb($userdb, $dbh);
3632 # Read from local files
3633 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3635 if (defined(&theme_get_module_acl)) {
3636 %rv = &theme_get_module_acl($g, $m, \%rv);
3641 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3643 Updates the acl hash for some user and module. The parameters are :
3645 =item acl - Hash reference for the new access control options, or undef to clear
3647 =item user - User to update, defaulting to the current user.
3649 =item module - Module to update, defaulting to the caller.
3651 =item never-update-group - Never update the user's group's ACL
3656 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3657 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3658 if (!$_[3] && &foreign_check("acl")) {
3659 # Check if this user is a member of a group, and if he gets the
3660 # module from a group. If so, update its ACL as well
3661 &foreign_require("acl", "acl-lib.pl");
3663 foreach my $g (&acl::list_groups()) {
3664 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3665 &indexof($m, @{$g->{'modules'}}) >= 0) {
3671 &save_group_module_acl($_[0], $group->{'name'}, $m);
3675 my $userdb = &get_userdb_string();
3677 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3678 # Look for this user in the user/group DB
3679 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3680 ref($dbh) || &error(&text('euserdbacl', $dbh));
3681 if ($proto eq "mysql" || $proto eq "postgresql") {
3682 # Find the user in the SQL DB
3683 my $cmd = $dbh->prepare(
3684 "select id from webmin_user where name = ?");
3685 $cmd && $cmd->execute($u) ||
3686 &error(&text('euserdbacl2', $dbh->errstr));
3687 my ($id) = $cmd->fetchrow();
3688 $foundindb = 1 if (defined($id));
3691 # Replace ACLs for user
3693 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3694 "where id = ? and module = ?");
3695 $cmd && $cmd->execute($id, $m) ||
3696 &error(&text('euserdbacl', $dbh->errstr));
3699 my $cmd = $dbh->prepare(
3700 "insert into webmin_user_acl ".
3701 "(id,module,attr,value) values (?,?,?,?)");
3702 $cmd || &error(&text('euserdbacl2',
3704 foreach my $a (keys %{$_[0]}) {
3705 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3706 &error(&text('euserdbacl2',
3713 elsif ($proto eq "ldap") {
3714 # Find the user in LDAP
3715 my $rv = $dbh->search(
3717 filter => '(&(cn='.$u.')(objectClass='.
3718 $args->{'userclass'}.'))',
3720 if (!$rv || $rv->code) {
3721 &error(&text('euserdbacl',
3722 $rv ? $rv->error : "Unknown error"));
3724 my ($user) = $rv->all_entries;
3727 # Find the ACL sub-object for the module
3729 my $ldapm = $m || "global";
3730 my $rv = $dbh->search(
3731 base => $user->dn(),
3732 filter => '(cn='.$ldapm.')',
3734 if (!$rv || $rv->code) {
3735 &error(&text('euserdbacl',
3736 $rv ? $rv->error : "Unknown error"));
3738 my ($acl) = $rv->all_entries;
3741 foreach my $a (keys %{$_[0]}) {
3742 push(@al, $a."=".$_[0]->{$a});
3746 $rv = $dbh->modify($acl->dn(),
3747 replace => { "webminAclEntry", \@al });
3751 my @attrs = ( "cn", $ldapm,
3752 "objectClass", "webminAcl",
3753 "webminAclEntry", \@al );
3754 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3757 if (!$rv || $rv->code) {
3758 &error(&text('euserdbacl2',
3759 $rv ? $rv->error : "Unknown error"));
3763 &disconnect_userdb($userdb, $dbh);
3767 # Save ACL to local file
3768 if (!-d "$config_directory/$m") {
3769 mkdir("$config_directory/$m", 0755);
3772 &write_file("$config_directory/$m/$u.acl", $_[0]);
3775 &unlink_file("$config_directory/$m/$u.acl");
3780 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3782 Updates the acl hash for some group and module. The parameters are :
3784 =item acl - Hash reference for the new access control options.
3786 =item group - Group name to update.
3788 =item module - Module to update, defaulting to the caller.
3790 =item never-update-group - Never update the parent group's ACL
3793 sub save_group_module_acl
3796 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3797 if (!$_[3] && &foreign_check("acl")) {
3798 # Check if this group is a member of a group, and if it gets the
3799 # module from a group. If so, update the parent ACL as well
3800 &foreign_require("acl", "acl-lib.pl");
3802 foreach my $pg (&acl::list_groups()) {
3803 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3804 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3810 &save_group_module_acl($_[0], $group->{'name'}, $m);
3814 my $userdb = &get_userdb_string();
3817 # Look for this group in the user/group DB
3818 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3819 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3820 if ($proto eq "mysql" || $proto eq "postgresql") {
3821 # Find the group in the SQL DB
3822 my $cmd = $dbh->prepare(
3823 "select id from webmin_group where name = ?");
3824 $cmd && $cmd->execute($g) ||
3825 &error(&text('egroupdbacl2', $dbh->errstr));
3826 my ($id) = $cmd->fetchrow();
3827 $foundindb = 1 if (defined($id));
3830 # Replace ACLs for group
3832 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3833 "where id = ? and module = ?");
3834 $cmd && $cmd->execute($id, $m) ||
3835 &error(&text('egroupdbacl', $dbh->errstr));
3838 my $cmd = $dbh->prepare(
3839 "insert into webmin_group_acl ".
3840 "(id,module,attr,value) values (?,?,?,?)");
3841 $cmd || &error(&text('egroupdbacl2',
3843 foreach my $a (keys %{$_[0]}) {
3844 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3845 &error(&text('egroupdbacl2',
3852 elsif ($proto eq "ldap") {
3853 # Find the group in LDAP
3854 my $rv = $dbh->search(
3856 filter => '(&(cn='.$g.')(objectClass='.
3857 $args->{'groupclass'}.'))',
3859 if (!$rv || $rv->code) {
3860 &error(&text('egroupdbacl',
3861 $rv ? $rv->error : "Unknown error"));
3863 my ($group) = $rv->all_entries;
3865 my $ldapm = $m || "global";
3867 # Find the ACL sub-object for the module
3869 my $rv = $dbh->search(
3870 base => $group->dn(),
3871 filter => '(cn='.$ldapm.')',
3873 if (!$rv || $rv->code) {
3874 &error(&text('egroupdbacl',
3875 $rv ? $rv->error : "Unknown error"));
3877 my ($acl) = $rv->all_entries;
3880 foreach my $a (keys %{$_[0]}) {
3881 push(@al, $a."=".$_[0]->{$a});
3885 $rv = $dbh->modify($acl->dn(),
3886 replace => { "webminAclEntry", \@al });
3890 my @attrs = ( "cn", $ldapm,
3891 "objectClass", "webminAcl",
3892 "webminAclEntry", \@al );
3893 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
3896 if (!$rv || $rv->code) {
3897 &error(&text('egroupdbacl2',
3898 $rv ? $rv->error : "Unknown error"));
3902 &disconnect_userdb($userdb, $dbh);
3906 # Save ACL to local file
3907 if (!-d "$config_directory/$m") {
3908 mkdir("$config_directory/$m", 0755);
3911 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3914 &unlink_file("$config_directory/$m/$g.gacl");
3921 This function must be called by all Webmin CGI scripts, either directly or
3922 indirectly via a per-module lib.pl file. It performs a number of initialization
3923 and housekeeping tasks, such as working out the module name, checking that the
3924 current user has access to the module, and populating global variables. Some
3925 of the variables set include :
3927 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3929 =item $var_directory - Base logs directory, typically /var/webmin
3931 =item %config - Per-module configuration.
3933 =item %gconfig - Global configuration.
3935 =item $scriptname - Base name of the current perl script.
3937 =item $module_name - The name of the current module.
3939 =item $module_config_directory - The config directory for this module.
3941 =item $module_config_file - The config file for this module.
3943 =item $module_root_directory - This module's code directory.
3945 =item $webmin_logfile - The detailed logfile for webmin.
3947 =item $remote_user - The actual username used to login to webmin.
3949 =item $base_remote_user - The username whose permissions are in effect.
3951 =item $current_theme - The theme currently in use.
3953 =item $root_directory - The first root directory of this webmin install.
3955 =item @root_directories - All root directories for this webmin install.
3960 # Record first process ID that called this, so we know when it exited to clean
3962 $main::initial_process_id ||= $$;
3964 # Configuration and spool directories
3965 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3966 die "WEBMIN_CONFIG not set";
3968 $config_directory = $ENV{'WEBMIN_CONFIG'};
3969 if (!defined($ENV{'WEBMIN_VAR'})) {
3970 open(VARPATH, "$config_directory/var-path");
3971 chop($var_directory = <VARPATH>);
3975 $var_directory = $ENV{'WEBMIN_VAR'};
3977 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3978 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3980 if ($ENV{'SESSION_ID'}) {
3981 # Hide this variable from called programs, but keep it for internal use
3982 $main::session_id = $ENV{'SESSION_ID'};
3983 delete($ENV{'SESSION_ID'});
3985 if ($ENV{'REMOTE_PASS'}) {
3986 # Hide the password too
3987 $main::remote_pass = $ENV{'REMOTE_PASS'};
3988 delete($ENV{'REMOTE_PASS'});
3991 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3992 # Looks like we are running setuid, but the real UID hasn't been set.
3993 # Do so now, so that executed programs don't get confused
3998 # Read the webmin global config file. This contains the OS type and version,
3999 # OS specific configuration and global options such as proxy servers
4000 $config_file = "$config_directory/config";
4002 &read_file_cached($config_file, \%gconfig);
4003 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
4004 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
4006 # Work out of this is a web, command line or cron job
4007 if (!$main::webmin_script_type) {
4008 if ($ENV{'SCRIPT_NAME'}) {
4010 $main::webmin_script_type = 'web';
4013 # Cron jobs have no TTY
4014 if ($gconfig{'os_type'} eq 'windows' ||
4015 open(DEVTTY, ">/dev/tty")) {
4016 $main::webmin_script_type = 'cmd';
4020 $main::webmin_script_type = 'cron';
4025 # If debugging is enabled, open the debug log
4026 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
4027 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
4028 if ($gconfig{'debug_size'}) {
4029 my @st = stat($dlog);
4030 if ($st[7] > $gconfig{'debug_size'}) {
4031 rename($dlog, $dlog.".0");
4034 open(main::DEBUGLOG, ">>$dlog");
4035 $main::opened_debug_log = 1;
4037 if ($gconfig{'debug_what_start'}) {
4038 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4039 $main::debug_log_start_time = time();
4040 &webmin_debug_log("START", "script=$script_name");
4041 $main::debug_log_start_module = $module_name;
4045 # Set PATH and LD_LIBRARY_PATH
4046 if ($gconfig{'path'}) {
4047 if ($gconfig{'syspath'}) {
4049 $ENV{'PATH'} = $gconfig{'path'};
4053 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
4056 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
4058 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
4059 if ($gconfig{'http_proxy'}) {
4060 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
4062 if ($gconfig{'ftp_proxy'}) {
4063 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
4065 if ($gconfig{'noproxy'}) {
4066 $ENV{'no_proxy'} = $gconfig{'noproxy'};
4069 # Find all root directories
4071 if (&get_miniserv_config(\%miniserv)) {
4072 @root_directories = ( $miniserv{'root'} );
4073 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
4074 push(@root_directories, $miniserv{"extraroot_$i"});
4078 # Work out which module we are in, and read the per-module config file
4079 $0 =~ s/\\/\//g; # Force consistent path on Windows
4080 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
4081 # In a foreign call - use the module name given
4082 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
4083 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
4084 @root_directories = ( $root_directory ) if (!@root_directories);
4086 elsif ($ENV{'SCRIPT_NAME'}) {
4087 my $sn = $ENV{'SCRIPT_NAME'};
4088 $sn =~ s/^$gconfig{'webprefix'}//
4089 if (!$gconfig{'webprefixnoredir'});
4090 if ($sn =~ /^\/([^\/]+)\//) {
4091 # Get module name from CGI path
4094 if ($ENV{'SERVER_ROOT'}) {
4095 $root_directory = $ENV{'SERVER_ROOT'};
4097 elsif ($ENV{'SCRIPT_FILENAME'}) {
4098 $root_directory = $ENV{'SCRIPT_FILENAME'};
4099 $root_directory =~ s/$sn$//;
4101 @root_directories = ( $root_directory ) if (!@root_directories);
4104 # Get root directory from miniserv.conf, and deduce module name from $0
4105 $root_directory = $root_directories[0];
4107 foreach my $r (@root_directories) {
4108 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
4109 # Under a module directory
4114 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
4120 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
4123 # Set the umask based on config
4124 if ($gconfig{'umask'} && !$main::umask_already++) {
4125 umask(oct($gconfig{'umask'}));
4128 # If this is a cron job or other background task, set the nice level
4129 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4131 if ($gconfig{'nice'}) {
4132 eval 'POSIX::nice($gconfig{\'nice\'});';
4135 # Set IO scheduling class and priority
4136 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4138 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4139 if ($gconfig{'sclass'} ne '');
4140 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4141 if ($gconfig{'sprio'} ne '');
4143 &execute_command("$cmd >/dev/null 2>&1");
4146 $main::nice_already++;
4149 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4150 $base_remote_user = $u;
4151 $remote_user = $ENV{'REMOTE_USER'};
4153 # Work out if user is definitely in the DB, and if so get his attrs
4154 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4155 %remote_user_attrs = ( );
4156 if ($remote_user_proto) {
4157 my $userdb = &get_userdb_string();
4158 my ($dbh, $proto, $prefix, $args) =
4159 $userdb ? &connect_userdb($userdb) : ( );
4161 if ($proto eq "mysql" || $proto eq "postgresql") {
4162 # Read attrs from SQL
4163 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
4164 if ($cmd && $cmd->execute($base_remote_user)) {
4165 while(my ($attr, $value) = $cmd->fetchrow()) {
4166 $remote_user_attrs{$attr} = $value;
4171 elsif ($proto eq "ldap") {
4172 # Read attrs from LDAP
4173 my $rv = $dbh->search(
4175 filter => '(&(cn='.$base_remote_user.')'.
4177 $args->{'userclass'}.'))',
4179 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4181 foreach $la ($u->get_value('webminAttr')) {
4182 my ($attr, $value) = split(/=/, $la, 2);
4183 $remote_user_attrs{$attr} = $value;
4187 &disconnect_userdb($userdb, $dbh);
4192 # Find and load the configuration file for this module
4193 my (@ruinfo, $rgroup);
4194 $module_config_directory = "$config_directory/$module_name";
4195 if (&get_product_name() eq "usermin" &&
4196 -r "$module_config_directory/config.$remote_user") {
4198 $module_config_file = "$module_config_directory/config.$remote_user";
4200 elsif (&get_product_name() eq "usermin" &&
4201 (@ruinfo = getpwnam($remote_user)) &&
4202 ($rgroup = getgrgid($ruinfo[3])) &&
4203 -r "$module_config_directory/config.\@$rgroup") {
4204 # Based on group name
4205 $module_config_file = "$module_config_directory/config.\@$rgroup";
4209 $module_config_file = "$module_config_directory/config";
4212 &read_file_cached($module_config_file, \%config);
4214 # Fix up windows-specific substitutions in values
4215 foreach my $k (keys %config) {
4216 if ($config{$k} =~ /\$\{systemroot\}/) {
4217 my $root = &get_windows_root();
4218 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4223 # Record the initial module
4224 $main::initial_module_name ||= $module_name;
4226 # Set some useful variables
4228 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4229 $gconfig{'mobile_theme'} :
4230 defined($remote_user_attrs{'theme'}) ?
4231 $remote_user_attrs{'theme'} :
4232 defined($gconfig{'theme_'.$remote_user}) ?
4233 $gconfig{'theme_'.$remote_user} :
4234 defined($gconfig{'theme_'.$base_remote_user}) ?
4235 $gconfig{'theme_'.$base_remote_user} :
4237 @current_themes = split(/\s+/, $current_themes);
4238 $current_theme = $current_themes[0];
4239 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4240 $theme_root_directory = $theme_root_directories[0];
4241 @theme_configs = ( );
4242 foreach my $troot (@theme_root_directories) {
4244 &read_file_cached("$troot/config", \%onetconfig);
4245 &read_file_cached("$troot/config", \%tconfig);
4246 push(@theme_configs, \%onetconfig);
4248 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4249 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4251 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4252 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4254 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4255 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4256 if ($tconfig{'preload_functions'}) {
4257 # Force load of theme functions right now, if requested
4258 &load_theme_library();
4260 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4261 # Load the theme's Webmin:: package classes
4262 do "$theme_root_directory/$tconfig{'oofunctions'}";
4267 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4268 : "$var_directory/webmin.log";
4270 # Load language strings into %text
4271 my @langs = &list_languages();
4273 if ($gconfig{'acceptlang'}) {
4274 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4275 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4277 $accepted_lang = $al->{'lang'};
4282 $current_lang = $force_lang ? $force_lang :
4283 $accepted_lang ? $accepted_lang :
4284 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4285 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4286 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4287 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4288 foreach my $l (@langs) {
4289 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4291 @lang_order_list = &unique($default_lang,
4292 split(/:/, $current_lang_info->{'fallback'}),
4294 %text = &load_language($module_name);
4295 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4297 # Get the %module_info for this module
4299 my ($mi) = grep { $_->{'dir'} eq $module_name }
4300 &get_all_module_infos(2);
4301 %module_info = %$mi;
4302 $module_root_directory = &module_root_directory($module_name);
4305 if ($module_name && !$main::no_acl_check &&
4306 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4307 # Check if the HTTP user can access this module
4308 if (!&foreign_available($module_name)) {
4309 if (!&foreign_check($module_name)) {
4310 &error(&text('emodulecheck',
4311 "<i>$module_info{'desc'}</i>"));
4314 &error(&text('emodule', "<i>$u</i>",
4315 "<i>$module_info{'desc'}</i>"));
4318 $main::no_acl_check++;
4321 # Check the Referer: header for nasty redirects
4322 my @referers = split(/\s+/, $gconfig{'referers'});
4324 my $r = $ENV{'HTTP_REFERER'};
4325 if ($r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?\[([^\]]+)\]/ ||
4326 $r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4329 my $http_host = $ENV{'HTTP_HOST'};
4330 $http_host =~ s/:\d+$//;
4331 $http_host =~ s/^\[(\S+)\]$/$1/;
4332 my $unsafe_index = $unsafe_index_cgi ||
4333 &get_module_variable('$unsafe_index_cgi');
4335 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4336 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4338 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4339 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4340 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4341 ($referer_site && $referer_site ne $http_host &&
4342 &indexof($referer_site, @referers) < 0 ||
4343 !$referer_site && $gconfig{'referers_none'}) &&
4344 !$trust_unknown_referers &&
4345 !&get_module_variable('$trust_unknown_referers')) {
4346 # Looks like a link from elsewhere .. show an error
4347 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4349 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4350 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4351 if ($referer_site) {
4353 print &text('referer_warn',
4354 "<tt>".&html_escape($r)."</tt>", $url);
4356 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4357 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4360 # No referer info given
4361 print &text('referer_warn_unknown', $url),"<p>\n";
4362 print &text('referer_fix1u'),"<p>\n";
4363 print &text('referer_fix2u'),"<p>\n";
4367 &footer("/", $text{'index'});
4370 $main::no_referers_check++;
4371 $main::completed_referers_check++;
4373 # Call theme post-init
4374 if (defined(&theme_post_init_config)) {
4375 &theme_post_init_config(@_);
4378 # Record that we have done the calling library in this package
4379 my ($callpkg, $lib) = caller();
4381 $main::done_foreign_require{$callpkg,$lib} = 1;
4383 # If a licence checking is enabled, do it now
4384 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4385 &foreign_check($gconfig{'licence_module'}) &&
4386 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4387 my $oldpwd = &get_current_dir();
4388 $main::done_licence_module_check++;
4389 $main::licence_module = $gconfig{'licence_module'};
4390 &foreign_require($main::licence_module, "licence_check.pl");
4391 ($main::licence_status, $main::licence_message) =
4392 &foreign_call($main::licence_module, "check_licence");
4396 # Export global variables to caller
4397 if ($main::export_to_caller) {
4398 foreach my $v ('$config_file', '%gconfig', '$null_file',
4399 '$path_separator', '@root_directories',
4400 '$root_directory', '$module_name',
4401 '$base_remote_user', '$remote_user',
4402 '$remote_user_proto', '%remote_user_attrs',
4403 '$module_config_directory', '$module_config_file',
4404 '%config', '@current_themes', '$current_theme',
4405 '@theme_root_directories', '$theme_root_directory',
4406 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4407 '$webmin_logfile', '$current_lang',
4408 '$current_lang_info', '@lang_order_list', '%text',
4409 '%module_info', '$module_root_directory') {
4410 my ($vt, $vn) = split('', $v, 2);
4411 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4418 =head2 load_language([module], [directory])
4420 Returns a hashtable mapping text codes to strings in the appropriate language,
4421 based on the $current_lang global variable, which is in turn set based on
4422 the Webmin user's selection. The optional module parameter tells the function
4423 which module to load strings for, and defaults to the calling module. The
4424 optional directory parameter can be used to load strings from a directory
4427 In regular module development you will never need to call this function
4428 directly, as init_config calls it for you, and places the module's strings
4429 into the %text hash.
4435 my $root = $root_directory;
4436 my $ol = $gconfig{'overlang'};
4437 my ($dir) = ($_[1] || "lang");
4439 # Read global lang files
4440 foreach my $o (@lang_order_list) {
4441 my $ok = &read_file_cached_with_stat("$root/$dir/$o", \%text);
4442 return () if (!$ok && $o eq $default_lang);
4445 foreach my $o (@lang_order_list) {
4446 &read_file_cached("$root/$ol/$o", \%text);
4449 &read_file_cached("$config_directory/custom-lang", \%text);
4450 foreach my $o (@lang_order_list) {
4451 next if ($o eq "en");
4452 &read_file_cached("$config_directory/custom-lang.$o", \%text);
4454 my $norefs = $text{'__norefs'};
4457 # Read module's lang files
4458 delete($text{'__norefs'});
4459 my $mdir = &module_root_directory($_[0]);
4460 foreach my $o (@lang_order_list) {
4461 &read_file_cached_with_stat("$mdir/$dir/$o", \%text);
4464 foreach my $o (@lang_order_list) {
4465 &read_file_cached("$mdir/$ol/$o", \%text);
4468 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4469 foreach my $o (@lang_order_list) {
4470 next if ($o eq "en");
4471 &read_file_cached("$config_directory/$_[0]/custom-lang.$o",
4474 $norefs = $text{'__norefs'} if ($norefs);
4477 # Replace references to other strings
4479 foreach $k (keys %text) {
4480 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4484 if (defined(&theme_load_language)) {
4485 &theme_load_language(\%text, $_[0]);
4490 =head2 text_subs(string)
4492 Used internally by load_language to expand $code substitutions in language
4498 if (substr($_[0], 0, 8) eq "include:") {
4501 open(INCLUDE, substr($_[0], 8));
4509 my $t = $_[1]->{$_[0]};
4510 return defined($t) ? $t : '$'.$_[0];
4514 =head2 text(message, [substitute]+)
4516 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4517 the substitute parameters. This makes it easy to use strings with placeholders
4518 that get replaced with programmatically generated text. For example :
4520 print &text('index_hello', $remote_user),"<p>\n";
4525 my $t = &get_module_variable('%text', 1);
4526 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4527 for(my $i=1; $i<@_; $i++) {
4528 $rv =~ s/\$$i/$_[$i]/g;
4533 =head2 encode_base64(string)
4535 Encodes a string into base64 format, for use in MIME email or HTTP
4536 authorization headers.
4542 pos($_[0]) = 0; # ensure start at the beginning
4543 while ($_[0] =~ /(.{1,57})/gs) {
4544 $res .= substr(pack('u57', $1), 1)."\n";
4547 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4548 my $padding = (3 - length($_[0]) % 3) % 3;
4549 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4553 =head2 decode_base64(string)
4555 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4562 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4563 if (length($str) % 4) {
4566 $str =~ s/=+$//; # remove padding
4567 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4568 while ($str =~ /(.{1,60})/gs) {
4569 my $len = chr(32 + length($1)*3/4); # compute length byte
4570 $res .= unpack("u", $len . $1 ); # uudecode
4575 =head2 get_module_info(module, [noclone], [forcache])
4577 Returns a hash containg details of the given module. Some useful keys are :
4579 =item dir - The module directory, like sendmail.
4581 =item desc - Human-readable description, in the current users' language.
4583 =item version - Optional module version number.
4585 =item os_support - List of supported operating systems and versions.
4587 =item category - Category on Webmin's left menu, like net.
4592 return () if ($_[0] =~ /^\./);
4593 my (%rv, $clone, $o);
4594 my $mdir = &module_root_directory($_[0]);
4595 &read_file_cached("$mdir/module.info", \%rv) || return ();
4597 # A clone is a module that links to another directory under the root
4598 foreach my $r (@root_directories) {
4599 if (&is_under_directory($r, $mdir)) {
4605 foreach $o (@lang_order_list) {
4606 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4607 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4609 if ($clone && !$_[1] && $config_directory) {
4610 $rv{'clone'} = $rv{'desc'};
4611 &read_file("$config_directory/$_[0]/clone", \%rv);
4614 my %module_categories;
4615 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4616 my $pn = &get_product_name();
4617 if (defined($rv{'category_'.$pn})) {
4618 # Can override category for webmin/usermin
4619 $rv{'category'} = $rv{'category_'.$pn};
4621 $rv{'realcategory'} = $rv{'category'};
4622 $rv{'category'} = $module_categories{$_[0]}
4623 if (defined($module_categories{$_[0]}));
4625 # Apply description overrides
4626 $rv{'realdesc'} = $rv{'desc'};
4628 &read_file_cached("$config_directory/webmin.descs", \%descs);
4629 if ($descs{$_[0]}) {
4630 $rv{'desc'} = $descs{$_[0]};
4632 foreach my $o (@lang_order_list) {
4633 my $ov = $descs{$_[0]." ".$o} || $descs{$_[0]."_".$o};
4634 $rv{'desc'} = $ov if ($ov);
4638 # Apply per-user description overridde
4639 my %gaccess = &get_module_acl(undef, "");
4640 if ($gaccess{'desc_'.$_[0]}) {
4641 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4645 if ($rv{'longdesc'}) {
4646 # All standard modules have an index.cgi
4647 $rv{'index_link'} = 'index.cgi';
4650 # Call theme-specific override function
4651 if (defined(&theme_get_module_info)) {
4652 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4658 =head2 get_all_module_infos(cachemode)
4660 Returns a list contains the information on all modules in this webmin
4661 install, including clones. Uses caching to reduce the number of module.info
4662 files that need to be read. Each element of the array is a hash reference
4663 in the same format as returned by get_module_info. The cache mode flag can be :
4664 0 = read and write, 1 = don't read or write, 2 = read only
4667 sub get_all_module_infos
4671 # Is the cache out of date? (ie. have any of the root's changed?)
4672 my $cache_file = "$config_directory/module.infos.cache";
4674 if (&read_file_cached($cache_file, \%cache)) {
4675 foreach my $r (@root_directories) {
4677 if ($st[9] != $cache{'mtime_'.$r}) {
4687 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4688 # Can use existing module.info cache
4690 foreach my $k (keys %cache) {
4691 if ($k =~ /^(\S+) (\S+)$/) {
4692 $mods{$1}->{$2} = $cache{$k};
4695 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4698 # Need to rebuild cache
4700 foreach my $r (@root_directories) {
4702 foreach my $m (readdir(DIR)) {
4703 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4704 my %minfo = &get_module_info($m, 0, 1);
4705 next if (!%minfo || !$minfo{'dir'});
4707 foreach $k (keys %minfo) {
4708 $cache{"${m} ${k}"} = $minfo{$k};
4713 $cache{'mtime_'.$r} = $st[9];
4715 $cache{'lang'} = $current_lang;
4716 if (!$_[0] && $< == 0 && $> == 0) {
4718 # Don't fail if cache write fails
4719 local $main::error_must_die = 1;
4720 &write_file($cache_file, \%cache);
4725 # Override descriptions for modules for current user
4726 my %gaccess = &get_module_acl(undef, "");
4727 foreach my $m (@rv) {
4728 if ($gaccess{"desc_".$m->{'dir'}}) {
4729 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4733 # Apply installed flags
4735 &read_file_cached("$config_directory/installed.cache", \%installed);
4736 foreach my $m (@rv) {
4737 $m->{'installed'} = $installed{$m->{'dir'}};
4743 =head2 get_theme_info(theme)
4745 Returns a hash containing a theme's details, taken from it's theme.info file.
4746 Some useful keys are :
4748 =item dir - The theme directory, like blue-theme.
4750 =item desc - Human-readable description, in the current users' language.
4752 =item version - Optional module version number.
4754 =item os_support - List of supported operating systems and versions.
4759 return () if ($_[0] =~ /^\./);
4761 my $tdir = &module_root_directory($_[0]);
4762 &read_file("$tdir/theme.info", \%rv) || return ();
4763 foreach my $o (@lang_order_list) {
4764 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4770 =head2 list_languages
4772 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4773 Each is a hash reference with the following keys :
4775 =item lang - The short language code, like es for Spanish.
4777 =item desc - A human-readable description, in English.
4779 =item charset - An optional character set to use when displaying the language.
4781 =item titles - Set to 1 only if Webmin has title images for the language.
4783 =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.
4788 if (!@main::list_languages_cache) {
4791 open(LANG, "$root_directory/lang_list.txt");
4793 if (/^(\S+)\s+(.*)/) {
4794 my $l = { 'desc' => $2 };
4795 foreach $o (split(/,/, $1)) {
4796 if ($o =~ /^([^=]+)=(.*)$/) {
4800 $l->{'index'} = scalar(@rv);
4801 push(@main::list_languages_cache, $l);
4805 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4806 @main::list_languages_cache;
4808 return @main::list_languages_cache;
4811 =head2 read_env_file(file, &hash, [include-commented])
4813 Similar to Webmin's read_file function, but handles files containing shell
4814 environment variables formatted like :
4819 The file parameter is the full path to the file to read, and hash a Perl hash
4820 ref to read names and values into.
4826 &open_readfile(FILE, $_[0]) || return 0;
4829 # Remove start of line comments
4833 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4834 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4835 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4843 =head2 write_env_file(file, &hash, [export])
4845 Writes out a hash to a file in name='value' format, suitable for use in a shell
4846 script. The parameters are :
4848 =item file - Full path for a file to write to
4850 =item hash - Hash reference of names and values to write.
4852 =item export - If set to 1, preceed each variable setting with the word 'export'.
4857 my $exp = $_[2] ? "export " : "";
4858 &open_tempfile(FILE, ">$_[0]");
4859 foreach my $k (keys %{$_[1]}) {
4860 my $v = $_[1]->{$k};
4861 if ($v =~ /^\S+$/) {
4862 &print_tempfile(FILE, "$exp$k=$v\n");
4865 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4868 &close_tempfile(FILE);
4871 =head2 lock_file(filename, [readonly], [forcefile])
4873 Lock a file for exclusive access. If the file is already locked, spin
4874 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4875 to work OK. The parameters are :
4877 =item filename - File or directory to lock.
4879 =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.
4881 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4886 my $realfile = &translate_filename($_[0]);
4887 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4888 my $no_lock = !&can_lock_file($realfile);
4889 my $lock_tries_count = 0;
4892 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4897 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4900 # Create the .lock file
4901 open(LOCKING, ">$realfile.lock") || return 0;
4902 my $lck = eval "flock(LOCKING, 2+4)";
4904 # Lock of lock file failed! Wait till later
4907 print LOCKING $$,"\n";
4908 eval "flock(LOCKING, 8)";
4911 $main::locked_file_list{$realfile} = int($_[1]);
4912 push(@main::temporary_files, "$realfile.lock");
4913 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4914 !&get_module_variable('$no_log_file_changes') &&
4916 # Grab a copy of this file for later diffing
4918 $main::locked_file_data{$realfile} = undef;
4920 $main::locked_file_type{$realfile} = 1;
4921 $main::locked_file_data{$realfile} = '';
4923 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4924 $main::locked_file_type{$realfile} = 2;
4925 $main::locked_file_data{$realfile} = $lnk;
4927 elsif (open(ORIGFILE, $realfile)) {
4928 $main::locked_file_type{$realfile} = 0;
4929 $main::locked_file_data{$realfile} = '';
4932 $main::locked_file_data{$realfile} .=$_;
4941 if ($lock_tries_count++ > 5*60) {
4942 # Give up after 5 minutes
4943 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4949 =head2 unlock_file(filename)
4951 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4952 file changes is enabled, then at unlock file a diff will be taken between the
4953 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4954 called. This can then be viewed in the Webmin Actions Log module.
4959 my $realfile = &translate_filename($_[0]);
4960 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4961 unlink("$realfile.lock") if (&can_lock_file($realfile));
4962 delete($main::locked_file_list{$realfile});
4963 if (exists($main::locked_file_data{$realfile})) {
4964 # Diff the new file with the old
4966 my $lnk = readlink($realfile);
4967 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4968 my $oldtype = $main::locked_file_type{$realfile};
4969 my $new = !defined($main::locked_file_data{$realfile});
4970 if ($new && !-e _) {
4971 # file doesn't exist, and never did! do nothing ..
4973 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4974 # is (or was) a directory ..
4975 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4976 push(@main::locked_file_diff,
4977 { 'type' => 'mkdir', 'object' => $realfile });
4979 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4980 push(@main::locked_file_diff,
4981 { 'type' => 'rmdir', 'object' => $realfile });
4984 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4985 # is (or was) a symlink ..
4986 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4987 push(@main::locked_file_diff,
4988 { 'type' => 'symlink', 'object' => $realfile,
4991 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4992 push(@main::locked_file_diff,
4993 { 'type' => 'unsymlink', 'object' => $realfile,
4994 'data' => $main::locked_file_data{$realfile} });
4996 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4997 push(@main::locked_file_diff,
4998 { 'type' => 'resymlink', 'object' => $realfile,
5003 # is a file, or has changed type?!
5004 my ($diff, $delete_file);
5005 my $type = "modify";
5007 open(NEWFILE, ">$realfile");
5012 if (!defined($main::locked_file_data{$realfile})) {
5015 open(ORIGFILE, ">$realfile.webminorig");
5016 print ORIGFILE $main::locked_file_data{$realfile};
5018 $diff = &backquote_command(
5019 "diff ".quotemeta("$realfile.webminorig")." ".
5020 quotemeta($realfile)." 2>/dev/null");
5021 push(@main::locked_file_diff,
5022 { 'type' => $type, 'object' => $realfile,
5023 'data' => $diff } ) if ($diff);
5024 unlink("$realfile.webminorig");
5025 unlink($realfile) if ($delete_file);
5028 if ($gconfig{'logfullfiles'}) {
5029 # Add file details to list of those to fully log
5030 $main::orig_file_data{$realfile} ||=
5031 $main::locked_file_data{$realfile};
5032 $main::orig_file_type{$realfile} ||=
5033 $main::locked_file_type{$realfile};
5036 delete($main::locked_file_data{$realfile});
5037 delete($main::locked_file_type{$realfile});
5041 =head2 test_lock(file)
5043 Returns 1 if some file is currently locked, 0 if not.
5048 my $realfile = &translate_filename($_[0]);
5049 return 0 if (!$_[0]);
5050 return 1 if (defined($main::locked_file_list{$realfile}));
5051 return 0 if (!&can_lock_file($realfile));
5053 if (open(LOCKING, "$realfile.lock")) {
5058 return $pid && kill(0, $pid);
5061 =head2 unlock_all_files
5063 Unlocks all files locked by the current script.
5066 sub unlock_all_files
5068 foreach $f (keys %main::locked_file_list) {
5073 =head2 can_lock_file(file)
5075 Returns 1 if some file should be locked, based on the settings in the
5076 Webmin Configuration module. For internal use by lock_file only.
5081 if (&is_readonly_mode()) {
5082 return 0; # never lock in read-only mode
5084 elsif ($gconfig{'lockmode'} == 0) {
5087 elsif ($gconfig{'lockmode'} == 1) {
5091 # Check if under any of the directories
5093 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
5094 if (&same_file($d, $_[0]) ||
5095 &is_under_directory($d, $_[0])) {
5099 return $gconfig{'lockmode'} == 2 ? $match : !$match;
5103 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
5105 Log some action taken by a user. This is typically called at the end of a
5106 script, once all file changes are complete and all commands run. The
5109 =item action - A short code for the action being performed, like 'create'.
5111 =item type - A code for the type of object the action is performed to, like 'user'.
5113 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
5115 =item params - A hash ref of additional information about the action.
5117 =item module - Name of the module in which the action was performed, which defaults to the current module.
5119 =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.
5121 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
5123 =item client-ip - IP address of the browser that performed the action.
5128 return if (!$gconfig{'log'} || &is_readonly_mode());
5129 my $m = $_[4] ? $_[4] : &get_module_name();
5131 if ($gconfig{'logclear'}) {
5132 # check if it is time to clear the log
5133 my @st = stat("$webmin_logfile.time");
5134 my $write_logtime = 0;
5136 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
5137 # clear logfile and all diff files
5138 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
5139 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
5140 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
5141 unlink($webmin_logfile);
5148 if ($write_logtime) {
5149 open(LOGTIME, ">$webmin_logfile.time");
5150 print LOGTIME time(),"\n";
5155 # If an action script directory is defined, call the appropriate scripts
5156 if ($gconfig{'action_script_dir'}) {
5157 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
5158 my ($basedir) = $gconfig{'action_script_dir'};
5160 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
5163 opendir(DIR, $dir) or die "Can't open $dir: $!";
5164 while (defined($file = readdir(DIR))) {
5165 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
5166 if (-x "$dir/$file") {
5167 # Call a script notifying it of the action
5169 $ENV{'ACTION_MODULE'} = &get_module_name();
5170 $ENV{'ACTION_ACTION'} = $_[0];
5171 $ENV{'ACTION_TYPE'} = $_[1];
5172 $ENV{'ACTION_OBJECT'} = $_[2];
5173 $ENV{'ACTION_SCRIPT'} = $script_name;
5174 foreach my $p (keys %param) {
5175 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5177 system("$dir/$file", @_,
5178 "<$null_file", ">$null_file", "2>&1");
5186 # should logging be done at all?
5187 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5188 split(/\s+/, $gconfig{'logusers'})) < 0);
5189 return if ($gconfig{'logmodules'} && &indexof($m,
5190 split(/\s+/, $gconfig{'logmodules'})) < 0);
5194 my @tm = localtime($now);
5195 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5196 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5197 $main::action_id_count++;
5198 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5199 $id, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5200 $tm[2], $tm[1], $tm[0],
5201 $remote_user || '-',
5202 $main::session_id || '-',
5203 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5204 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5205 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5207 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5208 my $v = $_[3]->{$k};
5214 elsif (ref($v) eq 'ARRAY') {
5218 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5219 $line .= " $k='$vv'";
5223 foreach $vv (split(/\0/, $v)) {
5225 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5226 $line .= " $k='$vv'";
5229 $param{$k} = join(" ", @pv);
5231 open(WEBMINLOG, ">>$webmin_logfile");
5232 print WEBMINLOG $line,"\n";
5234 if ($gconfig{'logperms'}) {
5235 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5238 chmod(0600, $webmin_logfile);
5241 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5242 # Find and record the changes made to any locked files, or commands run
5244 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5245 foreach my $d (@main::locked_file_diff) {
5246 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
5247 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
5248 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5249 print DIFFLOG $d->{'data'};
5251 if ($d->{'input'}) {
5252 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5253 print DIFFLOG $d->{'input'};
5256 if ($gconfig{'logperms'}) {
5257 chmod(oct($gconfig{'logperms'}),
5258 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
5259 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5263 @main::locked_file_diff = undef;
5266 if ($gconfig{'logfullfiles'}) {
5267 # Save the original contents of any modified files
5269 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5270 foreach my $f (keys %main::orig_file_data) {
5271 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
5272 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
5273 if (!defined($main::orig_file_type{$f})) {
5274 print ORIGLOG -1," ",$f,"\n";
5277 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5279 print ORIGLOG $main::orig_file_data{$f};
5281 if ($gconfig{'logperms'}) {
5282 chmod(oct($gconfig{'logperms'}),
5283 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
5287 %main::orig_file_data = undef;
5288 %main::orig_file_type = undef;
5291 if ($miniserv::page_capture_out) {
5292 # Save the whole page output
5293 mkdir("$ENV{'WEBMIN_VAR'}/output", 0700);
5294 open(PAGEOUT, ">$ENV{'WEBMIN_VAR'}/output/$id");
5295 print PAGEOUT $miniserv::page_capture_out;
5297 if ($gconfig{'logperms'}) {
5298 chmod(oct($gconfig{'logperms'}),
5299 "$ENV{'WEBMIN_VAR'}/output/$id");
5301 $miniserv::page_capture_out = undef;
5305 if ($gconfig{'logsyslog'}) {
5306 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5307 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5308 setlogsock("inet");';
5310 # Syslog module is installed .. try to convert to a
5311 # human-readable form
5313 my $mod = &get_module_name();
5314 my $mdir = module_root_directory($mod);
5315 if (-r "$mdir/log_parser.pl") {
5316 &foreign_require($mod, "log_parser.pl");
5318 foreach my $k (keys %{$_[3]}) {
5319 my $v = $_[3]->{$k};
5320 if (ref($v) eq 'ARRAY') {
5321 $params{$k} = join("\0", @$v);
5327 $msg = &foreign_call($mod, "parse_webmin_log",
5328 $remote_user, $script_name,
5329 $_[0], $_[1], $_[2], \%params);
5330 $msg =~ s/<[^>]*>//g; # Remove tags
5332 elsif ($_[0] eq "_config_") {
5333 my %wtext = &load_language("webminlog");
5334 $msg = $wtext{'search_config'};
5336 $msg ||= "$_[0] $_[1] $_[2]";
5337 my %info = &get_module_info($m);
5338 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5343 =head2 additional_log(type, object, data, [input])
5345 Records additional log data for an upcoming call to webmin_log, such
5346 as a command that was run or SQL that was executed. Typically you will never
5347 need to call this function directory.
5352 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5353 push(@main::locked_file_diff,
5354 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5355 'input' => $_[3] } );
5359 =head2 webmin_debug_log(type, message)
5361 Write something to the Webmin debug log. For internal use only.
5364 sub webmin_debug_log
5366 my ($type, $msg) = @_;
5367 return 0 if (!$main::opened_debug_log);
5368 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5369 if ($gconfig{'debug_modules'}) {
5370 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5371 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5374 eval 'use Time::HiRes qw(gettimeofday); ($now, $ms) = gettimeofday';
5376 my @tm = localtime($now);
5378 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d.%6.6d] %s %s %s %s \"%s\"",
5379 $$, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5380 $tm[2], $tm[1], $tm[0], $ms,
5381 $remote_user || "-",
5382 $ENV{'REMOTE_HOST'} || "-",
5383 &get_module_name() || "-",
5386 seek(main::DEBUGLOG, 0, 2);
5387 print main::DEBUGLOG $line."\n";
5391 =head2 system_logged(command)
5393 Just calls the Perl system() function, but also logs the command run.
5398 if (&is_readonly_mode()) {
5399 print STDERR "Vetoing command $_[0]\n";
5402 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5403 my $cmd = join(" ", @realcmd);
5405 if ($cmd =~ s/(\s*&\s*)$//) {
5408 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5409 $cmd =~ s/^\((.*)\)\s*$/$1/;
5411 &additional_log('exec', undef, $cmd);
5412 return system(@realcmd);
5415 =head2 backquote_logged(command)
5417 Executes a command and returns the output (like `command`), but also logs it.
5420 sub backquote_logged
5422 if (&is_readonly_mode()) {
5424 print STDERR "Vetoing command $_[0]\n";
5427 my $realcmd = &translate_command($_[0]);
5430 if ($cmd =~ s/(\s*&\s*)$//) {
5433 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5434 $cmd =~ s/^\((.*)\)\s*$/$1/;
5436 &additional_log('exec', undef, $cmd);
5437 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5441 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5443 Runs some command, waiting at most the given number of seconds for it to
5444 complete, and returns the output. The maxlines parameter sets the number
5445 of lines of output to capture. The safe parameter should be set to 1 if the
5446 command is safe for read-only mode users to run.
5449 sub backquote_with_timeout
5451 my $realcmd = &translate_command($_[0]);
5452 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5453 if ($gconfig{'debug_what_cmd'});
5455 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5460 my $elapsed = time() - $start;
5461 last if ($elapsed > $_[1]);
5463 vec($rmask, fileno(OUT), 1) = 1;
5464 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5465 last if (!$sel || $sel < 0);
5467 last if (!defined($line));
5470 if ($_[3] && $linecount >= $_[3]) {
5475 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5479 return wantarray ? ($out, $timed_out) : $out;
5482 =head2 backquote_command(command, safe?)
5484 Executes a command and returns the output (like `command`), subject to
5485 command translation. The safe parameter should be set to 1 if the command
5486 is safe for read-only mode users to run.
5489 sub backquote_command
5491 if (&is_readonly_mode() && !$_[1]) {
5492 print STDERR "Vetoing command $_[0]\n";
5496 my $realcmd = &translate_command($_[0]);
5497 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5501 =head2 kill_logged(signal, pid, ...)
5503 Like Perl's built-in kill function, but also logs the fact that some process
5504 was killed. On Windows, falls back to calling process.exe to terminate a
5510 return scalar(@_)-1 if (&is_readonly_mode());
5511 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5512 if ($gconfig{'debug_what_procs'});
5513 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5514 if ($gconfig{'os_type'} eq 'windows') {
5515 # Emulate some kills with process.exe
5516 my $arg = $_[0] eq "KILL" ? "-k" :
5517 $_[0] eq "TERM" ? "-q" :
5518 $_[0] eq "STOP" ? "-s" :
5519 $_[0] eq "CONT" ? "-r" : undef;
5521 foreach my $p (@_[1..@_-1]) {
5523 $ok ||= kill($_[0], $p);
5526 &execute_command("process $arg $p");
5538 =head2 rename_logged(old, new)
5540 Re-names a file and logs the rename. If the old and new files are on different
5541 filesystems, calls mv or the Windows rename function to do the job.
5546 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5547 return &rename_file($_[0], $_[1]);
5550 =head2 rename_file(old, new)
5552 Renames a file or directory. If the old and new files are on different
5553 filesystems, calls mv or the Windows rename function to do the job.
5558 if (&is_readonly_mode()) {
5559 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5562 my $src = &translate_filename($_[0]);
5563 my $dst = &translate_filename($_[1]);
5564 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5565 if ($gconfig{'debug_what_ops'});
5566 my $ok = rename($src, $dst);
5567 if (!$ok && $! !~ /permission/i) {
5568 # Try the mv command, in case this is a cross-filesystem rename
5569 if ($gconfig{'os_type'} eq 'windows') {
5570 # Need to use rename
5571 my $out = &backquote_command("rename ".quotemeta($_[0]).
5572 " ".quotemeta($_[1])." 2>&1");
5574 $! = $out if (!$ok);
5578 my $out = &backquote_command("mv ".quotemeta($_[0]).
5579 " ".quotemeta($_[1])." 2>&1");
5581 $! = $out if (!$ok);
5587 =head2 symlink_logged(src, dest)
5589 Create a symlink, and logs it. Effectively does the same thing as the Perl
5596 my $rv = &symlink_file($_[0], $_[1]);
5597 &unlock_file($_[1]);
5601 =head2 symlink_file(src, dest)
5603 Creates a soft link, unless in read-only mode. Effectively does the same thing
5604 as the Perl symlink function.
5609 if (&is_readonly_mode()) {
5610 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5613 my $src = &translate_filename($_[0]);
5614 my $dst = &translate_filename($_[1]);
5615 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5616 if ($gconfig{'debug_what_ops'});
5617 return symlink($src, $dst);
5620 =head2 link_file(src, dest)
5622 Creates a hard link, unless in read-only mode. The existing new link file
5623 will be deleted if necessary. Effectively the same as Perl's link function.
5628 if (&is_readonly_mode()) {
5629 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5632 my $src = &translate_filename($_[0]);
5633 my $dst = &translate_filename($_[1]);
5634 &webmin_debug_log('LINK', "src=$src dst=$dst")
5635 if ($gconfig{'debug_what_ops'});
5636 unlink($dst); # make sure link works
5637 return link($src, $dst);
5640 =head2 make_dir(dir, perms, recursive)
5642 Creates a directory and sets permissions on it, unless in read-only mode.
5643 The perms parameter sets the octal permissions to apply, which unlike Perl's
5644 mkdir will really get set. The recursive flag can be set to 1 to have the
5645 function create parent directories too.
5650 my ($dir, $perms, $recur) = @_;
5651 if (&is_readonly_mode()) {
5652 print STDERR "Vetoing directory $dir\n";
5655 $dir = &translate_filename($dir);
5656 my $exists = -d $dir ? 1 : 0;
5657 return 1 if ($exists && $recur); # already exists
5658 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5659 my $rv = mkdir($dir, $perms);
5660 if (!$rv && $recur) {
5661 # Failed .. try mkdir -p
5662 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5663 my $ex = &execute_command("mkdir $param "."e_path($dir));
5669 chmod($perms, $dir);
5674 =head2 set_ownership_permissions(user, group, perms, file, ...)
5676 Sets the user, group owner and permissions on some files. The parameters are :
5678 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5680 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5682 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5684 =item file - One or more files or directories to modify.
5687 sub set_ownership_permissions
5689 my ($user, $group, $perms, @files) = @_;
5690 if (&is_readonly_mode()) {
5691 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5694 @files = map { &translate_filename($_) } @files;
5695 if ($gconfig{'debug_what_ops'}) {
5696 foreach my $f (@files) {
5697 &webmin_debug_log('PERMS',
5698 "file=$f user=$user group=$group perms=$perms");
5702 if (defined($user)) {
5703 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5705 if (defined($group)) {
5706 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5709 my @uinfo = getpwuid($uid);
5712 $rv = chown($uid, $gid, @files);
5714 if ($rv && defined($perms)) {
5715 $rv = chmod($perms, @files);
5720 =head2 unlink_logged(file, ...)
5722 Like Perl's unlink function, but locks the files beforehand and un-locks them
5723 after so that the deletion is logged by Webmin.
5729 foreach my $f (@_) {
5730 if (!&test_lock($f)) {
5735 my @rv = &unlink_file(@_);
5736 foreach my $f (@_) {
5741 return wantarray ? @rv : $rv[0];
5744 =head2 unlink_file(file, ...)
5746 Deletes some files or directories. Like Perl's unlink function, but also
5747 recursively deletes directories with the rm command if needed.
5752 return 1 if (&is_readonly_mode());
5755 foreach my $f (@_) {
5756 &unflush_file_lines($f);
5757 my $realf = &translate_filename($f);
5758 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5760 if (!rmdir($realf)) {
5762 if ($gconfig{'os_type'} eq 'windows') {
5763 # Call del and rmdir commands
5766 my $out = `del /q "$qm" 2>&1`;
5768 $out = `rmdir "$qm" 2>&1`;
5773 my $qm = quotemeta($realf);
5774 $out = `rm -rf $qm 2>&1`;
5783 if (!unlink($realf)) {
5789 return wantarray ? ($rv, $err) : $rv;
5792 =head2 copy_source_dest(source, dest)
5794 Copy some file or directory to a new location. Returns 1 on success, or 0
5795 on failure - also sets $! on failure. If the source is a directory, uses
5796 piped tar commands to copy a whole directory structure including permissions
5800 sub copy_source_dest
5802 return (1, undef) if (&is_readonly_mode());
5803 my ($src, $dst) = @_;
5806 &webmin_debug_log('COPY', "src=$src dst=$dst")
5807 if ($gconfig{'debug_what_ops'});
5808 if ($gconfig{'os_type'} eq 'windows') {
5809 # No tar or cp on windows, so need to use copy command
5813 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5816 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5824 # A directory .. need to copy with tar command
5825 my @st = stat($src);
5828 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5829 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5836 # Can just copy with cp
5837 my $out = &backquote_logged("cp -p ".quotemeta($src).
5838 " ".quotemeta($dst)." 2>&1");
5844 return wantarray ? ($ok, $err) : $ok;
5847 =head2 remote_session_name(host|&server)
5849 Generates a session ID for some server. For this server, this will always
5850 be an empty string. For a server object it will include the hostname and
5851 port and PID. For a server name, it will include the hostname and PID. For
5855 sub remote_session_name
5857 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5858 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5859 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5860 ref($_[0]) ? "" : "$_[0].$$";
5863 =head2 remote_foreign_require(server, module, file)
5865 Connects to rpc.cgi on a remote webmin server and have it open a session
5866 to a process that will actually do the require and run functions. This is the
5867 equivalent for foreign_require, but for a remote Webmin system. The server
5868 parameter can either be a hostname of a system registered in the Webmin
5869 Servers Index module, or a hash reference for a system from that module.
5872 sub remote_foreign_require
5874 my $call = { 'action' => 'require',
5877 my $sn = &remote_session_name($_[0]);
5878 if ($remote_session{$sn}) {
5879 $call->{'session'} = $remote_session{$sn};
5882 $call->{'newsession'} = 1;
5884 my $rv = &remote_rpc_call($_[0], $call);
5885 if ($rv->{'session'}) {
5886 $remote_session{$sn} = $rv->{'session'};
5887 $remote_session_server{$sn} = $_[0];
5891 =head2 remote_foreign_call(server, module, function, [arg]*)
5893 Call a function on a remote server. Must have been setup first with
5894 remote_foreign_require for the same server and module. Equivalent to
5895 foreign_call, but with the extra server parameter to specify the remote
5899 sub remote_foreign_call
5901 return undef if (&is_readonly_mode());
5902 my $sn = &remote_session_name($_[0]);
5903 return &remote_rpc_call($_[0], { 'action' => 'call',
5906 'session' => $remote_session{$sn},
5907 'args' => [ @_[3 .. $#_] ] } );
5910 =head2 remote_foreign_check(server, module, [api-only])
5912 Checks if some module is installed and supported on a remote server. Equivilant
5913 to foreign_check, but for the remote Webmin system specified by the server
5917 sub remote_foreign_check
5919 return &remote_rpc_call($_[0], { 'action' => 'check',
5924 =head2 remote_foreign_config(server, module)
5926 Gets the configuration for some module from a remote server, as a hash.
5927 Equivalent to foreign_config, but for a remote system.
5930 sub remote_foreign_config
5932 return &remote_rpc_call($_[0], { 'action' => 'config',
5933 'module' => $_[1] });
5936 =head2 remote_eval(server, module, code)
5938 Evaluates some perl code in the context of a module on a remote webmin server.
5939 The server parameter must be the hostname of a remote system, module must
5940 be a module directory name, and code a string of Perl code to run. This can
5941 only be called after remote_foreign_require for the same server and module.
5946 return undef if (&is_readonly_mode());
5947 my $sn = &remote_session_name($_[0]);
5948 return &remote_rpc_call($_[0], { 'action' => 'eval',
5951 'session' => $remote_session{$sn} });
5954 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5956 Transfers some local file to another server via Webmin's RPC protocol, and
5957 returns the resulting remote filename. If the remotefile parameter is given,
5958 that is the destination filename which will be used. Otherwise a randomly
5959 selected temporary filename will be used, and returned by the function.
5964 return undef if (&is_readonly_mode());
5966 my $sn = &remote_session_name($_[0]);
5967 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5968 # Copy data over TCP connection
5969 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5971 'name' => $_[3] } );
5973 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5974 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5975 return &$main::remote_error_handler("Failed to transfer file : $error")
5978 while(read(FILE, $got, 1024) > 0) {
5982 shutdown(TWRITE, 1);
5984 if ($error && $error !~ /^OK/) {
5985 # Got back an error!
5986 return &$main::remote_error_handler("Failed to transfer file : $error");
5992 # Just pass file contents as parameters
5994 while(read(FILE, $got, 1024) > 0) {
5998 return &remote_rpc_call($_[0], { 'action' => 'write',
6001 'session' => $remote_session{$sn} });
6005 =head2 remote_read(server, localfile, remotefile)
6007 Transfers a file from a remote server to this system, using Webmin's RPC
6008 protocol. The server parameter must be the hostname of a system registered
6009 in the Webmin Servers Index module, localfile is the destination path on this
6010 system, and remotefile is the file to fetch from the remote server.
6015 my $sn = &remote_session_name($_[0]);
6016 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6017 # Copy data over TCP connection
6018 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
6019 'file' => $_[2] } );
6021 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
6024 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6025 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
6026 return &$main::remote_error_handler("Failed to transfer file : $error")
6029 open(FILE, ">$_[1]");
6030 while(read(TREAD, $got, 1024) > 0) {
6037 # Just get data as return value
6038 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
6040 'session' => $remote_session{$sn} });
6041 open(FILE, ">$_[1]");
6047 =head2 remote_finished
6049 Close all remote sessions. This happens automatically after a while
6050 anyway, but this function should be called to clean things up faster.
6055 foreach my $sn (keys %remote_session) {
6056 my $server = $remote_session_server{$sn};
6057 &remote_rpc_call($server, { 'action' => 'quit',
6058 'session' => $remote_session{$sn} } );
6059 delete($remote_session{$sn});
6060 delete($remote_session_server{$sn});
6062 foreach my $fh (keys %fast_fh_cache) {
6064 delete($fast_fh_cache{$fh});
6068 =head2 remote_error_setup(&function)
6070 Sets a function to be called instead of &error when a remote RPC operation
6071 fails. Useful if you want to have more control over your remote operations.
6074 sub remote_error_setup
6076 $main::remote_error_handler = $_[0] || \&error;
6079 =head2 remote_rpc_call(server, &structure)
6081 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
6082 and then reads back a reply structure. This is mainly for internal use only,
6083 and is called by the other remote_* functions.
6089 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
6091 # Server structure was given
6093 $serv->{'user'} || $serv->{'id'} == 0 ||
6094 return &$main::remote_error_handler(
6095 "No Webmin login set for server");
6098 # lookup the server in the webmin servers module if needed
6099 if (!%main::remote_servers_cache) {
6100 &foreign_require("servers", "servers-lib.pl");
6101 foreach $s (&foreign_call("servers", "list_servers")) {
6102 $main::remote_servers_cache{$s->{'host'}} = $s;
6103 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
6106 $serv = $main::remote_servers_cache{$_[0]};
6107 $serv || return &$main::remote_error_handler(
6108 "No Webmin Servers entry for $_[0]");
6109 $serv->{'user'} || return &$main::remote_error_handler(
6110 "No login set for server $_[0]");
6112 my $ip = $serv->{'ip'} || $serv->{'host'};
6114 # Work out the username and password
6116 if ($serv->{'sameuser'}) {
6117 $user = $remote_user;
6118 defined($main::remote_pass) || return &$main::remote_error_handler(
6119 "Password for this server is not available");
6120 $pass = $main::remote_pass;
6123 $user = $serv->{'user'};
6124 $pass = $serv->{'pass'};
6127 if ($serv->{'fast'} || !$sn) {
6128 # Make TCP connection call to fastrpc.cgi
6129 if (!$fast_fh_cache{$sn} && $sn) {
6130 # Need to open the connection
6131 my $con = &make_http_connection(
6132 $ip, $serv->{'port'}, $serv->{'ssl'},
6133 "POST", "/fastrpc.cgi");
6134 return &$main::remote_error_handler(
6135 "Failed to connect to $serv->{'host'} : $con")
6137 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6138 &write_http_connection($con, "User-agent: Webmin\r\n");
6139 my $auth = &encode_base64("$user:$pass");
6141 &write_http_connection($con, "Authorization: basic $auth\r\n");
6142 &write_http_connection($con, "Content-length: ",
6143 length($tostr),"\r\n");
6144 &write_http_connection($con, "\r\n");
6145 &write_http_connection($con, $tostr);
6147 # read back the response
6148 my $line = &read_http_connection($con);
6149 $line =~ tr/\r\n//d;
6150 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6151 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6153 $line =~ /^HTTP\/1\..\s+200\s+/ ||
6154 return &$main::remote_error_handler("HTTP error : $line");
6156 $line = &read_http_connection($con);
6157 $line =~ tr/\r\n//d;
6159 $line = &read_http_connection($con);
6160 if ($line =~ /^0\s+(.*)/) {
6161 return &$main::remote_error_handler("RPC error : $1");
6163 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
6164 $line =~ /^1\s+(\S+)\s+(\S+)/) {
6165 # Started ok .. connect and save SID
6166 &close_http_connection($con);
6167 my ($port, $sid, $version, $error) = ($1, $2, $3);
6168 &open_socket($ip, $port, $sid, \$error);
6169 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
6171 $fast_fh_cache{$sn} = $sid;
6172 $remote_server_version{$sn} = $version;
6175 while($stuff = &read_http_connection($con)) {
6178 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
6181 elsif (!$fast_fh_cache{$sn}) {
6182 # Open the connection by running fastrpc.cgi locally
6183 pipe(RPCOUTr, RPCOUTw);
6187 open(STDOUT, ">&RPCOUTw");
6191 $ENV{'REQUEST_METHOD'} = 'GET';
6192 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6193 $ENV{'SERVER_ROOT'} ||= $root_directory;
6195 if ($base_remote_user ne 'root' &&
6196 $base_remote_user ne 'admin') {
6197 # Need to fake up a login for the CGI!
6198 &read_acl(undef, \%acl, [ 'root' ]);
6199 $ENV{'BASE_REMOTE_USER'} =
6200 $ENV{'REMOTE_USER'} =
6201 $acl{'root'} ? 'root' : 'admin';
6203 delete($ENV{'FOREIGN_MODULE_NAME'});
6204 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6205 chdir($root_directory);
6206 if (!exec("$root_directory/fastrpc.cgi")) {
6207 print "exec failed : $!\n";
6214 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6218 if ($line =~ /^0\s+(.*)/) {
6219 return &$main::remote_error_handler("RPC error : $2");
6221 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6222 # Started ok .. connect and save SID
6224 my ($port, $sid, $error) = ($1, $2, undef);
6225 &open_socket("localhost", $port, $sid, \$error);
6226 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6227 $fast_fh_cache{$sn} = $sid;
6234 &error("Bad response from fastrpc.cgi : $line");
6237 # Got a connection .. send off the request
6238 my $fh = $fast_fh_cache{$sn};
6239 my $tostr = &serialise_variable($_[1]);
6240 print $fh length($tostr)," $fh\n";
6244 return &$main::remote_error_handler(
6245 "Error reading response length from fastrpc.cgi : $!")
6247 my $rlen = int($rstr);
6248 my ($fromstr, $got);
6249 while(length($fromstr) < $rlen) {
6250 return &$main::remote_error_handler(
6251 "Failed to read from fastrpc.cgi : $!")
6252 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6255 my $from = &unserialise_variable($fromstr);
6257 # No response at all
6258 return &$main::remote_error_handler("Remote Webmin error");
6260 elsif (ref($from) ne 'HASH') {
6262 return &$main::remote_error_handler(
6263 "Invalid remote Webmin response : $from");
6265 elsif (!$from->{'status'}) {
6267 $from->{'rv'} =~ s/\s+at\s+(\S+)\s+line\s+(\d+)(,\s+<\S+>\s+line\s+(\d+))?//;
6268 return &$main::remote_error_handler($from->{'rv'});
6270 if (defined($from->{'arv'})) {
6271 return @{$from->{'arv'}};
6274 return $from->{'rv'};
6278 # Call rpc.cgi on remote server
6279 my $tostr = &serialise_variable($_[1]);
6281 my $con = &make_http_connection($ip, $serv->{'port'},
6282 $serv->{'ssl'}, "POST", "/rpc.cgi");
6283 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6285 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6286 &write_http_connection($con, "User-agent: Webmin\r\n");
6287 my $auth = &encode_base64("$user:$pass");
6289 &write_http_connection($con, "Authorization: basic $auth\r\n");
6290 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6291 &write_http_connection($con, "\r\n");
6292 &write_http_connection($con, $tostr);
6294 # read back the response
6295 my $line = &read_http_connection($con);
6296 $line =~ tr/\r\n//d;
6297 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6298 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6300 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6302 $line = &read_http_connection($con);
6303 $line =~ tr/\r\n//d;
6306 while($line = &read_http_connection($con)) {
6310 my $from = &unserialise_variable($fromstr);
6311 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6312 if (defined($from->{'arv'})) {
6313 return @{$from->{'arv'}};
6316 return $from->{'rv'};
6321 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6323 Executes some function in parallel on multiple servers at once. Fills in
6324 the returns and errors arrays respectively. If the module and library
6325 parameters are given, that module is remotely required on the server first,
6326 to check if it is connectable. The parameters are :
6328 =item servers - A list of Webmin system hash references.
6330 =item parallel - Number of parallel operations to perform.
6332 =item function - Reference to function to call for each system.
6334 =item args - Additional parameters to the function.
6336 =item returns - Array ref to place return values into, in same order as servers.
6338 =item errors - Array ref to place error messages into.
6340 =item module - Optional module to require on the remote system first.
6342 =item library - Optional library to require in the module.
6345 sub remote_multi_callback
6347 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6348 &remote_error_setup(\&remote_multi_callback_error);
6350 # Call the functions
6352 foreach my $g (@$servs) {
6358 $remote_multi_callback_err = undef;
6360 # Require the remote lib
6361 &remote_foreign_require($g->{'host'}, $mod, $lib);
6362 if ($remote_multi_callback_err) {
6363 # Failed .. return error
6364 print $wh &serialise_variable(
6365 [ undef, $remote_multi_callback_err ]);
6371 my $a = ref($args) ? $args->[$p] : $args;
6372 my $rv = &$func($g, $a);
6375 print $wh &serialise_variable(
6376 [ $rv, $remote_multi_callback_err ]);
6384 # Read back the results
6386 foreach my $g (@$servs) {
6390 $errs->[$p] = "Failed to read response from $g->{'host'}";
6393 my $rv = &unserialise_variable($line);
6395 $rets->[$p] = $rv->[0];
6396 $errs->[$p] = $rv->[1];
6401 &remote_error_setup(undef);
6404 sub remote_multi_callback_error
6406 $remote_multi_callback_err = $_[0];
6409 =head2 serialise_variable(variable)
6411 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6412 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6413 called on each member to serialize the entire object.
6416 sub serialise_variable
6418 if (!defined($_[0])) {
6424 $rv = &urlize($_[0]);
6426 elsif ($r eq 'SCALAR') {
6427 $rv = &urlize(${$_[0]});
6429 elsif ($r eq 'ARRAY') {
6430 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6432 elsif ($r eq 'HASH') {
6433 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6434 &urlize(&serialise_variable($_[0]->{$_})) }
6437 elsif ($r eq 'REF') {
6438 $rv = &serialise_variable(${$_[0]});
6440 elsif ($r eq 'CODE') {
6445 # An object - treat as a hash
6446 $r = "OBJECT ".&urlize($r);
6447 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6448 &urlize(&serialise_variable($_[0]->{$_})) }
6451 return ($r ? $r : 'VAL').",".$rv;
6454 =head2 unserialise_variable(string)
6456 Converts a string created by serialise_variable() back into the original
6457 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6458 object, the same class is used on this system, if available.
6461 sub unserialise_variable
6463 my @v = split(/,/, $_[0]);
6465 if ($v[0] eq 'VAL') {
6466 @v = split(/,/, $_[0], -1);
6467 $rv = &un_urlize($v[1]);
6469 elsif ($v[0] eq 'SCALAR') {
6470 local $r = &un_urlize($v[1]);
6473 elsif ($v[0] eq 'ARRAY') {
6475 for(my $i=1; $i<@v; $i++) {
6476 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6479 elsif ($v[0] eq 'HASH') {
6481 for(my $i=1; $i<@v; $i+=2) {
6482 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6483 &unserialise_variable(&un_urlize($v[$i+1]));
6486 elsif ($v[0] eq 'REF') {
6487 local $r = &unserialise_variable($v[1]);
6490 elsif ($v[0] eq 'UNDEF') {
6493 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6494 # An object hash that we have to re-bless
6497 for(my $i=1; $i<@v; $i+=2) {
6498 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6499 &unserialise_variable(&un_urlize($v[$i+1]));
6507 =head2 other_groups(user)
6509 Returns a list of secondary groups a user is a member of, as a list of
6518 while(my @g = getgrent()) {
6519 my @m = split(/\s+/, $g[3]);
6520 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6522 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6526 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6528 Returns HTML for a button that pops up a data chooser window. The parameters
6531 =item dayfield - Name of the text field to place the day of the month into.
6533 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6535 =item yearfield - Name of the text field to place the year into.
6538 sub date_chooser_button
6540 return &theme_date_chooser_button(@_)
6541 if (defined(&theme_date_chooser_button));
6542 my ($w, $h) = (250, 225);
6543 if ($gconfig{'db_sizedate'}) {
6544 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6546 return "<input type=button onClick='window.dfield = form.$_[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";
6549 =head2 help_file(module, file)
6551 Returns the path to a module's help file of some name, typically under the
6552 help directory with a .html extension.
6557 my $mdir = &module_root_directory($_[0]);
6558 my $dir = "$mdir/help";
6559 foreach my $o (@lang_order_list) {
6560 my $lang = "$dir/$_[1].$o.html";
6561 return $lang if (-r $lang);
6563 return "$dir/$_[1].html";
6568 Seeds the random number generator, if not already done in this script. On Linux
6569 this makes use of the current time, process ID and a read from /dev/urandom.
6570 On other systems, only the current time and process ID are used.
6575 if (!$main::done_seed_random) {
6576 if (open(RANDOM, "/dev/urandom")) {
6578 read(RANDOM, $buf, 4);
6580 srand(time() ^ $$ ^ $buf);
6585 $main::done_seed_random = 1;
6589 =head2 disk_usage_kb(directory)
6591 Returns the number of kB used by some directory and all subdirs. Implemented
6592 by calling the C<du -k> command.
6597 my $dir = &translate_filename($_[0]);
6599 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6601 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6603 return $out =~ /^([0-9]+)/ ? $1 : "???";
6606 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6608 Returns the number of bytes taken up by all files in some directory and all
6609 sub-directories, by summing up their lengths. The disk_usage_kb is more
6610 reflective of reality, as the filesystem typically pads file sizes to 1k or
6614 sub recursive_disk_usage
6616 my $dir = &translate_filename($_[0]);
6623 my @st = stat($dir);
6629 my @files = readdir(DIR);
6631 foreach my $f (@files) {
6632 next if ($f eq "." || $f eq "..");
6633 next if ($skip && $f =~ /$skip/);
6634 next if ($only && $f !~ /$only/);
6635 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6641 =head2 help_search_link(term, [ section, ... ] )
6643 Returns HTML for a link to the man module for searching local and online
6644 docs for various search terms. The term parameter can either be a single
6645 word like 'bind', or a space-separated list of words. This function is typically
6646 used by modules that want to refer users to additional documentation in man
6647 pages or local system doc files.
6650 sub help_search_link
6652 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6653 my $for = &urlize(shift(@_));
6654 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6655 join("&", map { "section=$_" } @_)."&".
6656 "for=$for&exact=1&check=".&get_module_name()."'>".
6657 $text{'helpsearch'}."</a>\n";
6664 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6666 Opens a connection to some HTTP server, maybe through a proxy, and returns
6667 a handle object. The handle can then be used to send additional headers
6668 and read back a response. If anything goes wrong, returns an error string.
6669 The parameters are :
6671 =item host - Hostname or IP address of the webserver to connect to.
6673 =item port - HTTP port number to connect to.
6675 =item ssl - Set to 1 to connect in SSL mode.
6677 =item method - HTTP method, like GET or POST.
6679 =item page - Page to request on the webserver, like /foo/index.html
6681 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6684 sub make_http_connection
6686 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6689 foreach my $h (@$headers) {
6690 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6694 if (&is_readonly_mode()) {
6695 return "HTTP connections not allowed in readonly mode";
6697 my $rv = { 'fh' => time().$$ };
6700 eval "use Net::SSLeay";
6701 $@ && return $text{'link_essl'};
6702 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6703 eval "Net::SSLeay::load_error_strings()";
6704 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6705 return "Failed to create SSL context";
6706 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6707 return "Failed to create SSL connection";
6709 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6710 !&no_proxy($host)) {
6713 &open_socket($1, $2, $rv->{'fh'}, \$error);
6716 my $fh = $rv->{'fh'};
6717 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6718 if ($gconfig{'proxy_user'}) {
6719 my $auth = &encode_base64(
6720 "$gconfig{'proxy_user'}:".
6721 "$gconfig{'proxy_pass'}");
6722 $auth =~ tr/\r\n//d;
6723 print $fh "Proxy-Authorization: Basic $auth\r\n";
6727 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6728 return "Proxy error : $3" if ($2 != 200);
6731 return "Proxy error : $line";
6736 elsif (!$gconfig{'proxy_fallback'}) {
6737 # Connection to proxy failed - give up
6744 &open_socket($host, $port, $rv->{'fh'}, \$error);
6745 return $error if ($error);
6747 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6748 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6749 return "SSL connect() failed";
6750 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6751 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6754 # Plain HTTP request
6756 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6757 !&no_proxy($host)) {
6760 &open_socket($1, $2, $rv->{'fh'}, \$error);
6764 my $fh = $rv->{'fh'};
6765 my $rtxt = $method." ".
6766 "http://$host:$port$page HTTP/1.0\r\n";
6767 if ($gconfig{'proxy_user'}) {
6768 my $auth = &encode_base64(
6769 "$gconfig{'proxy_user'}:".
6770 "$gconfig{'proxy_pass'}");
6771 $auth =~ tr/\r\n//d;
6772 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6777 elsif (!$gconfig{'proxy_fallback'}) {
6782 # Connecting directly
6784 &open_socket($host, $port, $rv->{'fh'}, \$error);
6785 return $error if ($error);
6786 my $fh = $rv->{'fh'};
6787 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6794 =head2 read_http_connection(&handle, [bytes])
6796 Reads either one line or up to the specified number of bytes from the handle,
6797 originally supplied by make_http_connection.
6800 sub read_http_connection
6804 if ($h->{'ssl_con'}) {
6807 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6808 # need to read more..
6809 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6811 $rv = $h->{'buffer'};
6812 delete($h->{'buffer'});
6815 $h->{'buffer'} .= $more;
6817 $rv = substr($h->{'buffer'}, 0, $idx+1);
6818 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6821 if (length($h->{'buffer'})) {
6822 $rv = $h->{'buffer'};
6823 delete($h->{'buffer'});
6826 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6832 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6835 my $fh = $h->{'fh'};
6839 $rv = undef if ($rv eq "");
6843 =head2 write_http_connection(&handle, [data+])
6845 Writes the given data to the given HTTP connection handle.
6848 sub write_http_connection
6851 my $fh = $h->{'fh'};
6853 if ($h->{'ssl_ctx'}) {
6854 foreach my $s (@_) {
6855 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6856 $allok = 0 if (!$ok);
6860 my $ok = (print $fh @_);
6861 $allok = 0 if (!$ok);
6866 =head2 close_http_connection(&handle)
6868 Closes a connection to an HTTP server, identified by the given handle.
6871 sub close_http_connection
6877 =head2 clean_environment
6879 Deletes any environment variables inherited from miniserv so that they
6880 won't be passed to programs started by webmin. This is useful when calling
6881 programs that check for CGI-related environment variables and modify their
6882 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6885 sub clean_environment
6887 %UNCLEAN_ENV = %ENV;
6888 foreach my $k (keys %ENV) {
6889 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6893 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6894 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6895 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6896 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6897 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6898 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6899 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6900 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6906 =head2 reset_environment
6908 Puts the environment back how it was before clean_environment was callled.
6911 sub reset_environment
6914 foreach my $k (keys %UNCLEAN_ENV) {
6915 $ENV{$k} = $UNCLEAN_ENV{$k};
6917 undef(%UNCLEAN_ENV);
6921 =head2 progress_callback
6923 Never called directly, but useful for passing to &http_download to print
6924 out progress of an HTTP request.
6927 sub progress_callback
6929 if (defined(&theme_progress_callback)) {
6930 # Call the theme override
6931 return &theme_progress_callback(@_);
6935 print $progress_callback_prefix;
6937 $progress_size = $_[1];
6938 $progress_step = int($_[1] / 10);
6939 print &text('progress_size2', $progress_callback_url,
6940 &nice_size($progress_size)),"<br>\n";
6943 $progress_size = undef;
6944 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6946 $last_progress_time = $last_progress_size = undef;
6948 elsif ($_[0] == 3) {
6950 my $sp = $progress_callback_prefix.(" " x 5);
6951 if ($progress_size) {
6952 # And we have a size to compare against
6953 my $st = int(($_[1] * 10) / $progress_size);
6954 my $time_now = time();
6955 if ($st != $progress_step ||
6956 $time_now - $last_progress_time > 60) {
6957 # Show progress every 10% or 60 seconds
6958 print $sp,&text('progress_datan', &nice_size($_[1]),
6959 int($_[1]*100/$progress_size)),"<br>\n";
6960 $last_progress_time = $time_now;
6962 $progress_step = $st;
6965 # No total size .. so only show in 100k jumps
6966 if ($_[1] > $last_progress_size+100*1024) {
6967 print $sp,&text('progress_data2n',
6968 &nice_size($_[1])),"<br>\n";
6969 $last_progress_size = $_[1];
6973 elsif ($_[0] == 4) {
6974 # All done downloading
6975 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6977 elsif ($_[0] == 5) {
6978 # Got new location after redirect
6979 $progress_callback_url = $_[1];
6981 elsif ($_[0] == 6) {
6983 $progress_callback_url = $_[1];
6984 print &text('progress_incache', $progress_callback_url),"<br>\n";
6988 =head2 switch_to_remote_user
6990 Changes the user and group of the current process to that of the unix user
6991 with the same name as the current webmin login, or fails if there is none.
6992 This should be called by Usermin module scripts that only need to run with
6993 limited permissions.
6996 sub switch_to_remote_user
6998 @remote_user_info = $remote_user ? getpwnam($remote_user) :
7000 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
7001 &create_missing_homedir(\@remote_user_info);
7003 &switch_to_unix_user(\@remote_user_info);
7004 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
7005 $ENV{'HOME'} = $remote_user_info[7];
7007 # Export global variables to caller
7008 if ($main::export_to_caller) {
7009 my ($callpkg) = caller();
7010 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
7014 =head2 switch_to_unix_user(&user-details)
7016 Switches the current process to the UID and group ID from the given list
7017 of user details, which must be in the format returned by getpwnam.
7020 sub switch_to_unix_user
7023 if (!defined($uinfo->[0])) {
7024 # No username given, so just use given GID
7025 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
7028 # Use all groups from user
7029 ($(, $)) = ( $uinfo->[3],
7030 "$uinfo->[3] ".join(" ", $uinfo->[3],
7031 &other_groups($uinfo->[0])) );
7034 POSIX::setuid($uinfo->[2]);
7036 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
7037 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
7041 =head2 eval_as_unix_user(username, &code)
7043 Runs some code fragment with the effective UID and GID switch to that
7044 of the given Unix user, so that file IO takes place with his permissions.
7048 sub eval_as_unix_user
7050 my ($user, $code) = @_;
7051 my @uinfo = getpwnam($user);
7052 if (!scalar(@uinfo)) {
7053 &error("eval_as_unix_user called with invalid user $user");
7055 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
7059 local $main::error_must_die = 1;
7066 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
7069 return wantarray ? @rv : $rv[0];
7072 =head2 create_user_config_dirs
7074 Creates per-user config directories and sets $user_config_directory and
7075 $user_module_config_directory to them. Also reads per-user module configs
7076 into %userconfig. This should be called by Usermin module scripts that need
7077 to store per-user preferences or other settings.
7080 sub create_user_config_dirs
7082 return if (!$gconfig{'userconfig'});
7083 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
7084 return if (!@uinfo || !$uinfo[7]);
7085 &create_missing_homedir(\@uinfo);
7086 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
7087 if (!-d $user_config_directory) {
7088 mkdir($user_config_directory, 0700) ||
7089 &error("Failed to create $user_config_directory : $!");
7090 if ($< == 0 && $uinfo[2]) {
7091 chown($uinfo[2], $uinfo[3], $user_config_directory);
7094 if (&get_module_name()) {
7095 $user_module_config_directory = $user_config_directory."/".
7097 if (!-d $user_module_config_directory) {
7098 mkdir($user_module_config_directory, 0700) ||
7099 &error("Failed to create $user_module_config_directory : $!");
7100 if ($< == 0 && $uinfo[2]) {
7101 chown($uinfo[2], $uinfo[3], $user_config_directory);
7105 &read_file_cached("$module_root_directory/defaultuconfig",
7107 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
7108 &read_file_cached("$user_module_config_directory/config",
7112 # Export global variables to caller
7113 if ($main::export_to_caller) {
7114 my ($callpkg) = caller();
7115 foreach my $v ('$user_config_directory',
7116 '$user_module_config_directory', '%userconfig') {
7117 my ($vt, $vn) = split('', $v, 2);
7118 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
7123 =head2 create_missing_homedir(&uinfo)
7125 If auto homedir creation is enabled, create one for this user if needed.
7126 For internal use only.
7129 sub create_missing_homedir
7132 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
7133 # Use has no home dir .. make one
7134 system("mkdir -p ".quotemeta($uinfo->[7]));
7135 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
7136 if ($gconfig{'create_homedir_perms'} ne '') {
7137 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
7142 =head2 filter_javascript(text)
7144 Disables all javascript <script>, onClick= and so on tags in the given HTML,
7145 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
7148 sub filter_javascript
7151 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
7152 $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;
7153 $rv =~ s/(javascript:)/x$1/gi;
7154 $rv =~ s/(vbscript:)/x$1/gi;
7158 =head2 resolve_links(path)
7160 Given a path that may contain symbolic links, returns the real path.
7166 $path =~ s/\/+/\//g;
7167 $path =~ s/\/$// if ($path ne "/");
7168 my @p = split(/\/+/, $path);
7170 for(my $i=0; $i<@p; $i++) {
7171 my $sofar = "/".join("/", @p[0..$i]);
7172 my $lnk = readlink($sofar);
7173 if ($lnk eq $sofar) {
7174 # Link to itself! Cannot do anything more really ..
7177 elsif ($lnk =~ /^\//) {
7178 # Link is absolute..
7179 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
7183 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
7189 =head2 simplify_path(path, bogus)
7191 Given a path, maybe containing elements ".." and "." , convert it to a
7192 clean, absolute form. Returns undef if this is not possible.
7200 my @bits = split(/\/+/, $dir);
7203 foreach my $b (@bits) {
7207 elsif ($b eq "..") {
7209 if (scalar(@fixedbits) == 0) {
7210 # Cannot! Already at root!
7217 push(@fixedbits, $b);
7220 return "/".join('/', @fixedbits);
7223 =head2 same_file(file1, file2)
7225 Returns 1 if two files are actually the same
7230 return 1 if ($_[0] eq $_[1]);
7231 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7232 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7233 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7234 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7235 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7236 return 0 if (!@stat1 || !@stat2);
7237 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7240 =head2 flush_webmin_caches
7242 Clears all in-memory and on-disk caches used by Webmin.
7245 sub flush_webmin_caches
7247 undef(%main::read_file_cache);
7248 undef(%main::acl_hash_cache);
7249 undef(%main::acl_array_cache);
7250 undef(%main::has_command_cache);
7251 undef(@main::list_languages_cache);
7252 undef($main::got_list_usermods_cache);
7253 undef(@main::list_usermods_cache);
7254 undef(%main::foreign_installed_cache);
7255 unlink("$config_directory/module.infos.cache");
7256 &get_all_module_infos();
7259 =head2 list_usermods
7261 Returns a list of additional module restrictions. For internal use in
7267 if (!$main::got_list_usermods_cache) {
7268 @main::list_usermods_cache = ( );
7270 open(USERMODS, "$config_directory/usermin.mods");
7272 if (/^([^:]+):(\+|-|):(.*)/) {
7273 push(@main::list_usermods_cache,
7274 [ $1, $2, [ split(/\s+/, $3) ] ]);
7278 $main::got_list_usermods_cache = 1;
7280 return @main::list_usermods_cache;
7283 =head2 available_usermods(&allmods, &usermods)
7285 Returns a list of modules that are available to the given user, based
7286 on usermod additional/subtractions. For internal use by Usermin only.
7289 sub available_usermods
7291 return @{$_[0]} if (!@{$_[1]});
7293 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7294 my @uinfo = @remote_user_info;
7295 @uinfo = getpwnam($remote_user) if (!@uinfo);
7296 foreach my $u (@{$_[1]}) {
7298 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7301 elsif ($u->[0] =~ /^\@(.*)$/) {
7302 # Check for group membership
7303 my @ginfo = getgrnam($1);
7304 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7305 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7307 elsif ($u->[0] =~ /^\//) {
7308 # Check users and groups in file
7310 open(USERFILE, $u->[0]);
7313 if ($_ eq $remote_user) {
7316 elsif (/^\@(.*)$/) {
7317 my @ginfo = getgrnam($1);
7319 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7320 &indexof($remote_user,
7321 split(/\s+/, $ginfo[3])) >= 0));
7328 if ($u->[1] eq "+") {
7329 map { $mods{$_}++ } @{$u->[2]};
7331 elsif ($u->[1] eq "-") {
7332 map { delete($mods{$_}) } @{$u->[2]};
7336 map { $mods{$_}++ } @{$u->[2]};
7340 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7343 =head2 get_available_module_infos(nocache)
7345 Returns a list of modules available to the current user, based on
7346 operating system support, access control and usermod restrictions. Useful
7347 in themes that need to display a list of modules the user can use.
7348 Each element of the returned array is a hash reference in the same format as
7349 returned by get_module_info.
7352 sub get_available_module_infos
7355 &read_acl(\%acl, \%uacl, [ $base_remote_user ]);
7356 my $risk = $gconfig{'risk_'.$base_remote_user};
7358 foreach my $minfo (&get_all_module_infos($_[0])) {
7359 next if (!&check_os_support($minfo));
7361 # Check module risk level
7362 next if ($risk ne 'high' && $minfo->{'risk'} &&
7363 $minfo->{'risk'} !~ /$risk/);
7367 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7368 !$acl{$base_remote_user,"*"});
7370 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7374 # Check usermod restrictions
7375 my @usermods = &list_usermods();
7376 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7377 &available_usermods(\@rv, \@usermods);
7379 # Check RBAC restrictions
7381 foreach my $m (@rv) {
7382 if (&supports_rbac($m->{'dir'}) &&
7383 &use_rbac_module_acl(undef, $m->{'dir'})) {
7384 local $rbacs = &get_rbac_module_acl($remote_user,
7392 # Module or system doesn't support RBAC
7393 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7399 if (defined(&theme_foreign_available)) {
7400 foreach my $m (@rbacrv) {
7401 if (&theme_foreign_available($m->{'dir'})) {
7410 # Check licence module vetos
7412 if ($main::licence_module) {
7413 foreach my $m (@themerv) {
7414 if (&foreign_call($main::licence_module,
7415 "check_module_licence", $m->{'dir'})) {
7427 =head2 get_visible_module_infos(nocache)
7429 Like get_available_module_infos, but excludes hidden modules from the list.
7430 Each element of the returned array is a hash reference in the same format as
7431 returned by get_module_info.
7434 sub get_visible_module_infos
7437 my $pn = &get_product_name();
7438 return grep { !$_->{'hidden'} &&
7439 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7442 =head2 get_visible_modules_categories(nocache)
7444 Returns a list of Webmin module categories, each of which is a hash ref
7445 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7446 of modules in the category, in the format returned by get_module_info.
7447 Un-used modules are automatically assigned to the 'unused' category, and
7448 those with no category are put into 'others'.
7451 sub get_visible_modules_categories
7454 my @mods = &get_visible_module_infos($nocache);
7456 if (&get_product_name() eq 'webmin') {
7457 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7458 @mods = grep { $_->{'installed'} ne '0' } @mods;
7460 my %cats = &list_categories(\@mods);
7462 foreach my $c (keys %cats) {
7463 my $cat = { 'code' => $c || 'other',
7464 'desc' => $cats{$c} };
7465 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7468 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7469 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7471 # Add un-installed modules in magic category
7472 my $cat = { 'code' => 'unused',
7473 'desc' => $text{'main_unused'},
7475 'modules' => \@unmods };
7481 =head2 is_under_directory(directory, file)
7483 Returns 1 if the given file is under the specified directory, 0 if not.
7484 Symlinks are taken into account in the file to find it's 'real' location.
7487 sub is_under_directory
7489 my ($dir, $file) = @_;
7490 return 1 if ($dir eq "/");
7491 return 0 if ($file =~ /\.\./);
7492 my $ld = &resolve_links($dir);
7494 return &is_under_directory($ld, $file);
7496 my $lp = &resolve_links($file);
7498 return &is_under_directory($dir, $lp);
7500 return 0 if (length($file) < length($dir));
7501 return 1 if ($dir eq $file);
7503 return substr($file, 0, length($dir)) eq $dir;
7506 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7508 Given an absolute URL, returns the host, port, page and ssl flag components.
7509 If a username and password are given before the hostname, return those too.
7510 Relative URLs can also be parsed, if the base information is provided.
7515 if ($_[0] =~ /^(http|https):\/\/([^\@]+\@)?\[([^\]]+)\](:(\d+))?(\/\S*)?$/ ||
7516 $_[0] =~ /^(http|https):\/\/([^\@]+\@)?([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7518 my $ssl = $1 eq 'https';
7519 my @rv = ($3, $4 ? $5 : $ssl ? 443 : 80, $6 || "/", $ssl);
7520 if ($2 =~ /^([^:]+):(\S+)\@/) {
7529 elsif ($_[0] =~ /^\/\S*$/) {
7530 # A relative to the server URL
7531 return ($_[1], $_[2], $_[0], $_[4], $_[5], $_[6]);
7534 # A relative to the directory URL
7536 $page =~ s/[^\/]+$//;
7537 return ($_[1], $_[2], $page.$_[0], $_[4], $_[5], $_[6]);
7541 =head2 check_clicks_function
7543 Returns HTML for a JavaScript function called check_clicks that returns
7544 true when first called, but false subsequently. Useful on onClick for
7545 critical buttons. Deprecated, as this method of preventing duplicate actions
7549 sub check_clicks_function
7554 function check_clicks(form)
7561 for(i=0; i<form.length; i++)
7562 form.elements[i].disabled = true;
7571 =head2 load_entities_map
7573 Returns a hash ref containing mappings between HTML entities (like ouml) and
7574 ascii values (like 246). Mainly for internal use.
7577 sub load_entities_map
7579 if (!%entities_map_cache) {
7581 open(EMAP, "$root_directory/entities_map.txt");
7583 if (/^(\d+)\s+(\S+)/) {
7584 $entities_map_cache{$2} = $1;
7589 return \%entities_map_cache;
7592 =head2 entities_to_ascii(string)
7594 Given a string containing HTML entities like ö and 7, replace them
7595 with their ASCII equivalents.
7598 sub entities_to_ascii
7601 my $emap = &load_entities_map();
7602 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7603 $str =~ s/&#(\d+);/chr($1)/ge;
7607 =head2 get_product_name
7609 Returns either 'webmin' or 'usermin', depending on which program the current
7610 module is in. Useful for modules that can be installed into either.
7613 sub get_product_name
7615 return $gconfig{'product'} if (defined($gconfig{'product'}));
7616 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7621 Returns the character set for the current language, such as iso-8859-1.
7626 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7627 $current_lang_info->{'charset'} ?
7628 $current_lang_info->{'charset'} : $default_charset;
7632 =head2 get_display_hostname
7634 Returns the system's hostname for UI display purposes. This may be different
7635 from the actual hostname if you administrator has configured it so in the
7636 Webmin Configuration module.
7639 sub get_display_hostname
7641 if ($gconfig{'hostnamemode'} == 0) {
7642 return &get_system_hostname();
7644 elsif ($gconfig{'hostnamemode'} == 3) {
7645 return $gconfig{'hostnamedisplay'};
7648 my $h = $ENV{'HTTP_HOST'};
7650 if ($gconfig{'hostnamemode'} == 2) {
7651 $h =~ s/^(www|ftp|mail)\.//i;
7657 =head2 save_module_config([&config], [modulename])
7659 Saves the configuration for some module. The config parameter is an optional
7660 hash reference of names and values to save, which defaults to the global
7661 %config hash. The modulename parameter is the module to update the config
7662 file, which defaults to the current module.
7665 sub save_module_config
7667 my $c = $_[0] || { &get_module_variable('%config') };
7668 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7669 &write_file("$config_directory/$m/config", $c);
7672 =head2 save_user_module_config([&config], [modulename])
7674 Saves the user's Usermin preferences for some module. The config parameter is
7675 an optional hash reference of names and values to save, which defaults to the
7676 global %userconfig hash. The modulename parameter is the module to update the
7677 config file, which defaults to the current module.
7680 sub save_user_module_config
7682 my $c = $_[0] || { &get_module_variable('%userconfig') };
7683 my $m = $_[1] || &get_module_name();
7684 my $ucd = $user_config_directory;
7686 my @uinfo = @remote_user_info ? @remote_user_info
7687 : getpwnam($remote_user);
7688 return if (!@uinfo || !$uinfo[7]);
7689 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7691 &write_file("$ucd/$m/config", $c);
7694 =head2 nice_size(bytes, [min])
7696 Converts a number of bytes into a number followed by a suffix like GB, MB
7697 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7698 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7703 my ($units, $uname);
7704 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7705 $units = 1024*1024*1024*1024;
7708 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7709 $units = 1024*1024*1024;
7712 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7716 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7724 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7726 return $sz." ".$uname;
7729 =head2 get_perl_path
7731 Returns the path to Perl currently in use, such as /usr/bin/perl.
7736 if (open(PERL, "$config_directory/perl-path")) {
7742 return $^X if (-x $^X);
7743 return &has_command("perl");
7746 =head2 get_goto_module([&mods])
7748 Returns the details of a module that the current user should be re-directed
7749 to after logging in, or undef if none. Useful for themes.
7754 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7755 if ($gconfig{'gotomodule'}) {
7756 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7757 return $goto if ($goto);
7759 if (@mods == 1 && $gconfig{'gotoone'}) {
7765 =head2 select_all_link(field, form, [text])
7767 Returns HTML for a 'Select all' link that uses Javascript to select
7768 multiple checkboxes with the same name. The parameters are :
7770 =item field - Name of the checkbox inputs.
7772 =item form - Index of the form on the page.
7774 =item text - Message for the link, defaulting to 'Select all'.
7779 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7780 my ($field, $form, $text) = @_;
7782 $text ||= $text{'ui_selall'};
7783 return "<a class='select_all' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = true; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = true; } } return false'>$text</a>";
7786 =head2 select_invert_link(field, form, text)
7788 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7789 selection on multiple checkboxes with the same name. The parameters are :
7791 =item field - Name of the checkbox inputs.
7793 =item form - Index of the form on the page.
7795 =item text - Message for the link, defaulting to 'Invert selection'.
7798 sub select_invert_link
7800 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7801 my ($field, $form, $text) = @_;
7803 $text ||= $text{'ui_selinv'};
7804 return "<a class='select_invert' href='#' onClick='var ff = document.forms[$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>";
7807 =head2 select_rows_link(field, form, text, &rows)
7809 Returns HTML for a link that uses Javascript to select rows with particular
7810 values for their checkboxes. The parameters are :
7812 =item field - Name of the checkbox inputs.
7814 =item form - Index of the form on the page.
7816 =item text - Message for the link, de
7818 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7821 sub select_rows_link
7823 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7824 my ($field, $form, $text, $rows) = @_;
7826 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7827 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7828 $js .= "return false;";
7829 return "<a href='#' onClick='$js'>$text</a>";
7832 =head2 check_pid_file(file)
7834 Given a pid file, returns the PID it contains if the process is running.
7839 open(PIDFILE, $_[0]) || return undef;
7840 my $pid = <PIDFILE>;
7842 $pid =~ /^\s*(\d+)/ || return undef;
7843 kill(0, $1) || return undef;
7849 Return the local os-specific library name to this module. For internal use only.
7854 my $mn = &get_module_name();
7855 my $md = &module_root_directory($mn);
7856 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7857 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7859 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7860 return "$mn-$gconfig{'os_type'}-lib.pl";
7862 elsif (-r "$md/$mn-generic-lib.pl") {
7863 return "$mn-generic-lib.pl";
7870 =head2 module_root_directory(module)
7872 Given a module name, returns its root directory. On a typical Webmin install,
7873 all modules are under the same directory - but it is theoretically possible to
7877 sub module_root_directory
7879 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7880 if (@root_directories > 1) {
7881 foreach my $r (@root_directories) {
7887 return "$root_directories[0]/$d";
7890 =head2 list_mime_types
7892 Returns a list of all known MIME types and their extensions, as a list of hash
7893 references with keys :
7895 =item type - The MIME type, like text/plain.
7897 =item exts - A list of extensions, like .doc and .avi.
7899 =item desc - A human-readable description for the MIME type.
7904 if (!@list_mime_types_cache) {
7906 open(MIME, "$root_directory/mime.types");
7910 if (s/#\s*(.*)$//g) {
7913 my ($type, @exts) = split(/\s+/);
7915 push(@list_mime_types_cache, { 'type' => $type,
7922 return @list_mime_types_cache;
7925 =head2 guess_mime_type(filename, [default])
7927 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7928 The optional default parameter sets a default type of use if none is found,
7929 which defaults to application/octet-stream.
7934 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7936 foreach my $t (&list_mime_types()) {
7937 foreach my $e (@{$t->{'exts'}}) {
7938 return $t->{'type'} if (lc($e) eq lc($ext));
7942 return @_ > 1 ? $_[1] : "application/octet-stream";
7945 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7947 Opens a file handle for writing to a temporary file, which will only be
7948 renamed over the real file when the handle is closed. This allows critical
7949 files like /etc/shadow to be updated safely, even if writing fails part way
7950 through due to lack of disk space. The parameters are :
7952 =item handle - File handle to open, as you would use in Perl's open function.
7954 =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.
7956 =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 $! with the error code.
7958 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7960 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7966 # Just getting a temp file
7967 if (!defined($main::open_tempfiles{$_[0]})) {
7968 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7969 my $dir = $1 || "/";
7970 my $tmp = "$dir/$2.webmintmp.$$";
7971 $main::open_tempfiles{$_[0]} = $tmp;
7972 push(@main::temporary_files, $tmp);
7974 return $main::open_tempfiles{$_[0]};
7978 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7979 $fh = &callers_package($fh);
7981 my %gaccess = &get_module_acl(undef, "");
7982 my $db = $gconfig{'debug_what_write'};
7983 if ($file =~ /\r|\n|\0/) {
7984 if ($noerror) { return 0; }
7985 else { &error("Filename contains invalid characters"); }
7987 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7988 # Read-only mode .. veto all writes
7989 print STDERR "vetoing write to $file\n";
7990 return open($fh, ">$null_file");
7992 elsif ($file =~ /^(>|>>|)nul$/i) {
7993 # Write to Windows null device
7994 &webmin_debug_log($1 eq ">" ? "WRITE" :
7995 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7997 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7998 # Writes to /dev/null or TTYs don't need to be handled
7999 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
8000 return open($fh, $file);
8002 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
8003 &webmin_debug_log("WRITE", $1) if ($db);
8004 # Over-writing a file, via a temp file
8006 $file = &translate_filename($file);
8008 # Open the link target instead
8009 $file = &resolve_links($file);
8012 # Cannot open a directory!
8013 if ($noerror) { return 0; }
8014 else { &error("Cannot write to directory $file"); }
8016 my $tmp = &open_tempfile($file);
8017 my $ex = open($fh, ">$tmp");
8018 if (!$ex && $! =~ /permission/i) {
8019 # Could not open temp file .. try opening actual file
8021 $ex = open($fh, ">$file");
8022 delete($main::open_tempfiles{$file});
8025 $main::open_temphandles{$fh} = $file;
8028 if (!$ex && !$noerror) {
8029 &error(&text("efileopen", $file, $!));
8033 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
8034 # Just writing direct to a file
8035 &webmin_debug_log("WRITE", $1) if ($db);
8037 $file = &translate_filename($file);
8038 my @old_attributes = &get_clear_file_attributes($file);
8039 my $ex = open($fh, ">$file");
8040 &reset_file_attributes($file, \@old_attributes);
8041 $main::open_temphandles{$fh} = $file;
8042 if (!$ex && !$noerror) {
8043 &error(&text("efileopen", $file, $!));
8048 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
8049 # Appending to a file .. nothing special to do
8050 &webmin_debug_log("APPEND", $1) if ($db);
8052 $file = &translate_filename($file);
8053 my @old_attributes = &get_clear_file_attributes($file);
8054 my $ex = open($fh, ">>$file");
8055 &reset_file_attributes($file, \@old_attributes);
8056 $main::open_temphandles{$fh} = $file;
8057 if (!$ex && !$noerror) {
8058 &error(&text("efileopen", $file, $!));
8063 elsif ($file =~ /^([a-zA-Z]:)?\//) {
8064 # Read mode .. nothing to do here
8065 &webmin_debug_log("READ", $file) if ($db);
8066 $file = &translate_filename($file);
8067 return open($fh, $file);
8069 elsif ($file eq ">" || $file eq ">>") {
8070 my ($package, $filename, $line) = caller;
8071 if ($noerror) { return 0; }
8072 else { &error("Missing file to open at ${package}::${filename} line $line"); }
8075 my ($package, $filename, $line) = caller;
8076 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
8081 =head2 close_tempfile(file|handle)
8083 Copies a temp file to the actual file, assuming that all writes were
8084 successful. The handle must have been one passed to open_tempfile.
8090 my $fh = &callers_package($_[0]);
8092 if (defined($file = $main::open_temphandles{$fh})) {
8094 close($fh) || &error(&text("efileclose", $file, $!));
8095 delete($main::open_temphandles{$fh});
8096 return &close_tempfile($file);
8098 elsif (defined($main::open_tempfiles{$_[0]})) {
8100 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
8101 my @st = stat($_[0]);
8102 if (&is_selinux_enabled() && &has_command("chcon")) {
8103 # Set original security context
8104 system("chcon --reference=".quotemeta($_[0]).
8105 " ".quotemeta($main::open_tempfiles{$_[0]}).
8106 " >/dev/null 2>&1");
8108 my @old_attributes = &get_clear_file_attributes($_[0]);
8109 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
8111 # Set original permissions and ownership
8112 chmod($st[2], $_[0]);
8113 chown($st[4], $st[5], $_[0]);
8115 &reset_file_attributes($_[0], \@old_attributes);
8116 delete($main::open_tempfiles{$_[0]});
8117 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
8118 if ($main::open_templocks{$_[0]}) {
8119 &unlock_file($_[0]);
8120 delete($main::open_templocks{$_[0]});
8125 # Must be closing a handle not associated with a file
8131 =head2 print_tempfile(handle, text, ...)
8133 Like the normal print function, but calls &error on failure. Useful when
8134 combined with open_tempfile, to ensure that a criticial file is never
8135 only partially written.
8140 my ($fh, @args) = @_;
8141 $fh = &callers_package($fh);
8142 (print $fh @args) || &error(&text("efilewrite",
8143 $main::open_temphandles{$fh} || $fh, $!));
8146 =head2 is_selinux_enabled
8148 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
8151 sub is_selinux_enabled
8153 if (!defined($main::selinux_enabled_cache)) {
8155 if ($gconfig{'os_type'} !~ /-linux$/) {
8156 # Not on linux, so no way
8157 $main::selinux_enabled_cache = 0;
8159 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
8160 # Use global config file
8161 $main::selinux_enabled_cache =
8162 $seconfig{'SELINUX'} eq 'disabled' ||
8163 !$seconfig{'SELINUX'} ? 0 : 1;
8166 # Use selinuxenabled command
8167 #$selinux_enabled_cache =
8168 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
8169 $main::selinux_enabled_cache = 0;
8172 return $main::selinux_enabled_cache;
8175 =head2 get_clear_file_attributes(file)
8177 Finds file attributes that may prevent writing, clears them and returns them
8178 as a list. May call error. Mainly for internal use by open_tempfile and
8182 sub get_clear_file_attributes
8186 if ($gconfig{'chattr'}) {
8187 # Get original immutable bit
8188 my $out = &backquote_command(
8189 "lsattr ".quotemeta($file)." 2>/dev/null");
8191 $out =~ s/\s\S+\n//;
8192 @old_attributes = grep { $_ ne '-' } split(//, $out);
8194 if (&indexof("i", @old_attributes) >= 0) {
8195 my $err = &backquote_logged(
8196 "chattr -i ".quotemeta($file)." 2>&1");
8198 &error("Failed to remove immutable bit on ".
8203 return @old_attributes;
8206 =head2 reset_file_attributes(file, &attributes)
8208 Put back cleared attributes on some file. May call error. Mainly for internal
8209 use by close_tempfile.
8212 sub reset_file_attributes
8214 my ($file, $old_attributes) = @_;
8215 if (&indexof("i", @$old_attributes) >= 0) {
8216 my $err = &backquote_logged(
8217 "chattr +i ".quotemeta($file)." 2>&1");
8219 &error("Failed to restore immutable bit on ".
8225 =head2 cleanup_tempnames
8227 Remove all temporary files generated using transname. Typically only called
8228 internally when a Webmin script exits.
8231 sub cleanup_tempnames
8233 foreach my $t (@main::temporary_files) {
8236 @main::temporary_files = ( );
8239 =head2 open_lock_tempfile([handle], file, [no-error])
8241 Returns a temporary file for writing to some actual file, and also locks it.
8242 Effectively the same as calling lock_file and open_tempfile on the same file,
8243 but calls the unlock for you automatically when it is closed.
8246 sub open_lock_tempfile
8248 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8249 $fh = &callers_package($fh);
8250 my $lockfile = $file;
8251 $lockfile =~ s/^[^\/]*//;
8252 if ($lockfile =~ /^\//) {
8253 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8255 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8260 $main::end_exit_status ||= $?;
8261 if ($$ == $main::initial_process_id) {
8262 # Exiting from initial process
8263 &cleanup_tempnames();
8264 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8265 $main::debug_log_start_module eq &get_module_name()) {
8266 my $len = time() - $main::debug_log_start_time;
8267 &webmin_debug_log("STOP", "runtime=$len");
8268 $main::debug_log_start_time = 0;
8270 if (!$ENV{'SCRIPT_NAME'} &&
8271 $main::initial_module_name eq &get_module_name()) {
8272 # In a command-line script - call the real exit, so that the
8273 # exit status gets properly propogated. In some cases this
8274 # was not happening.
8275 exit($main::end_exit_status);
8280 =head2 month_to_number(month)
8282 Converts a month name like feb to a number like 1.
8287 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8290 =head2 number_to_month(number)
8292 Converts a number like 1 to a month name like Feb.
8297 return ucfirst($number_to_month_map{$_[0]});
8300 =head2 get_rbac_module_acl(user, module)
8302 Returns a hash reference of RBAC overrides ACLs for some user and module.
8303 May return undef if none exist (indicating access denied), or the string *
8304 if full access is granted.
8307 sub get_rbac_module_acl
8309 my ($user, $mod) = @_;
8310 eval "use Authen::SolarisRBAC";
8311 return undef if ($@);
8314 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8315 # Automagic webmin.modulename.admin authorization exists .. allow access
8317 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8318 %rv = ( 'noconfig' => 1 );
8325 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8329 my ($auths, $acls) = split(/\s+/, $_);
8330 my @auths = split(/,/, $auths);
8332 my ($merge) = ($acls =~ s/^\+//);
8334 if ($auths eq "*") {
8335 # These ACLs apply to all RBAC users.
8336 # Only if there is some that match a specific authorization
8337 # later will they be used though.
8340 # Check each of the RBAC authorizations
8341 foreach my $a (@auths) {
8342 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8347 $foundany++ if ($gotall);
8350 # Found an RBAC authorization - return the ACLs
8351 return "*" if ($acls eq "*");
8352 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8354 # Just add to current set
8355 foreach my $a (keys %acl) {
8366 return !$foundany ? undef : %rv ? \%rv : undef;
8369 =head2 supports_rbac([module])
8371 Returns 1 if RBAC client support is available, such as on Solaris.
8376 return 0 if ($gconfig{'os_type'} ne 'solaris');
8377 eval "use Authen::SolarisRBAC";
8380 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8385 =head2 supports_ipv6()
8387 Returns 1 if outgoing IPv6 connections can be made
8392 return $ipv6_module_error ? 0 : 1;
8395 =head2 use_rbac_module_acl(user, module)
8397 Returns 1 if some user should use RBAC to get permissions for a module
8400 sub use_rbac_module_acl
8402 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8403 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8404 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8405 my %access = &get_module_acl($u, $m, 1);
8406 return $access{'rbac'} ? 1 : 0;
8409 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8411 Runs some command, possibly feeding it input and capturing output to the
8412 give files or scalar references. The parameters are :
8414 =item command - Full command to run, possibly including shell meta-characters.
8416 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8418 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8420 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8422 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8424 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8429 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8430 if (&is_readonly_mode() && !$safe) {
8431 print STDERR "Vetoing command $_[0]\n";
8435 $cmd = &translate_command($cmd);
8437 # Use ` operator where possible
8438 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8439 if (!$stdin && ref($stdout) && !$stderr) {
8440 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8441 $$stdout = `$cmd 2>$null_file`;
8444 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8445 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8446 $$stdout = `$cmd 2>&1`;
8449 elsif (!$stdin && !$stdout && !$stderr) {
8450 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8451 return system("$cmd >$null_file 2>$null_file <$null_file");
8455 $| = 1; # needed on some systems to flush before forking
8456 pipe(EXECSTDINr, EXECSTDINw);
8457 pipe(EXECSTDOUTr, EXECSTDOUTw);
8458 pipe(EXECSTDERRr, EXECSTDERRw);
8460 if (!($pid = fork())) {
8464 open(STDIN, "<&EXECSTDINr");
8465 open(STDOUT, ">&EXECSTDOUTw");
8466 if (ref($stderr) && $stderr eq $stdout) {
8467 open(STDERR, ">&EXECSTDOUTw");
8470 open(STDERR, ">&EXECSTDERRw");
8477 my $fullcmd = "($cmd)";
8478 if ($stdin && !ref($stdin)) {
8479 $fullcmd .= " <$stdin";
8481 if ($stdout && !ref($stdout)) {
8482 $fullcmd .= " >$stdout";
8484 if ($stderr && !ref($stderr)) {
8485 if ($stderr eq $stdout) {
8486 $fullcmd .= " 2>&1";
8489 $fullcmd .= " 2>$stderr";
8492 if ($gconfig{'os_type'} eq 'windows') {
8496 exec("/bin/sh", "-c", $fullcmd);
8498 print "Exec failed : $!\n";
8505 # Feed input and capture output
8507 if ($stdin && ref($stdin)) {
8508 print EXECSTDINw $$stdin;
8511 if ($stdout && ref($stdout)) {
8513 while(<EXECSTDOUTr>) {
8518 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8520 while(<EXECSTDERRr>) {
8531 =head2 open_readfile(handle, file)
8533 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8534 exactly the same as Perl's open function.
8539 my ($fh, $file) = @_;
8540 $fh = &callers_package($fh);
8541 my $realfile = &translate_filename($file);
8542 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8543 return open($fh, "<".$realfile);
8546 =head2 open_execute_command(handle, command, output?, safe?)
8548 Runs some command, with the specified file handle set to either write to it if
8549 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8550 indicates if the command modifies the state of the system or not.
8553 sub open_execute_command
8555 my ($fh, $cmd, $mode, $safe) = @_;
8556 $fh = &callers_package($fh);
8557 my $realcmd = &translate_command($cmd);
8558 if (&is_readonly_mode() && !$safe) {
8559 # Don't actually run it
8560 print STDERR "vetoing command $cmd\n";
8563 return open($fh, ">$null_file");
8566 return open($fh, $null_file);
8570 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8571 if ($gconfig{'debug_what_cmd'});
8573 return open($fh, "| $cmd");
8575 elsif ($mode == 1) {
8576 return open($fh, "$cmd 2>$null_file |");
8578 elsif ($mode == 2) {
8579 return open($fh, "$cmd 2>&1 |");
8583 =head2 translate_filename(filename)
8585 Applies all relevant registered translation functions to a filename. Mostly
8586 for internal use, and typically does nothing.
8589 sub translate_filename
8591 my ($realfile) = @_;
8592 my @funcs = grep { $_->[0] eq &get_module_name() ||
8593 !defined($_->[0]) } @main::filename_callbacks;
8594 foreach my $f (@funcs) {
8596 $realfile = &$func($realfile, @{$f->[2]});
8601 =head2 translate_command(filename)
8603 Applies all relevant registered translation functions to a command. Mostly
8604 for internal use, and typically does nothing.
8607 sub translate_command
8610 my @funcs = grep { $_->[0] eq &get_module_name() ||
8611 !defined($_->[0]) } @main::command_callbacks;
8612 foreach my $f (@funcs) {
8614 $realcmd = &$func($realcmd, @{$f->[2]});
8619 =head2 register_filename_callback(module|undef, &function, &args)
8621 Registers some function to be called when the specified module (or all
8622 modules) tries to open a file for reading and writing. The function must
8623 return the actual file to open. This allows you to override which files
8624 other code actually operates on, via the translate_filename function.
8627 sub register_filename_callback
8629 my ($mod, $func, $args) = @_;
8630 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8633 =head2 register_command_callback(module|undef, &function, &args)
8635 Registers some function to be called when the specified module (or all
8636 modules) tries to execute a command. The function must return the actual
8637 command to run. This allows you to override which commands other other code
8638 actually runs, via the translate_command function.
8641 sub register_command_callback
8643 my ($mod, $func, $args) = @_;
8644 push(@main::command_callbacks, [ $mod, $func, $args ]);
8647 =head2 capture_function_output(&function, arg, ...)
8649 Captures output that some function prints to STDOUT, and returns it. Useful
8650 for functions outside your control that print data when you really want to
8651 manipulate it before output.
8654 sub capture_function_output
8656 my ($func, @args) = @_;
8657 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8658 my $old = select(SOCKET1);
8659 my @rv = &$func(@args);
8668 return wantarray ? ($out, \@rv) : $out;
8671 =head2 capture_function_output_tempfile(&function, arg, ...)
8673 Behaves the same as capture_function_output, but uses a temporary file
8674 to avoid buffer full problems.
8677 sub capture_function_output_tempfile
8679 my ($func, @args) = @_;
8680 my $temp = &transname();
8681 open(BUFFER, ">$temp");
8682 my $old = select(BUFFER);
8683 my @rv = &$func(@args);
8686 my $out = &read_file_contents($temp);
8687 &unlink_file($temp);
8688 return wantarray ? ($out, \@rv) : $out;
8691 =head2 modules_chooser_button(field, multiple, [form])
8693 Returns HTML for a button for selecting one or many Webmin modules.
8694 field - Name of the HTML field to place the module names into.
8695 multiple - Set to 1 if multiple modules can be selected.
8696 form - Index of the form on the page.
8699 sub modules_chooser_button
8701 return &theme_modules_chooser_button(@_)
8702 if (defined(&theme_modules_chooser_button));
8703 my $form = defined($_[2]) ? $_[2] : 0;
8704 my $w = $_[1] ? 700 : 500;
8706 if ($_[1] && $gconfig{'db_sizemodules'}) {
8707 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8709 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8710 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8712 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";
8715 =head2 substitute_template(text, &hash)
8717 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8718 the text replaces it with the value of the hash key foo. Also supports blocks
8719 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8720 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8723 sub substitute_template
8725 # Add some extra fixed parameters to the hash
8726 my %hash = %{$_[1]};
8727 $hash{'hostname'} = &get_system_hostname();
8728 $hash{'webmin_config'} = $config_directory;
8729 $hash{'webmin_etc'} = $config_directory;
8730 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8731 $hash{'webmin_var'} = $var_directory;
8733 # Add time-based parameters, for use in DNS
8734 $hash{'current_time'} = time();
8735 my @tm = localtime($hash{'current_time'});
8736 $hash{'current_year'} = $tm[5]+1900;
8737 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8738 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8739 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8740 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8741 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8743 # Actually do the substition
8745 foreach my $s (keys %hash) {
8746 next if ($s eq ''); # Prevent just $ from being subbed
8749 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8750 $rv =~ s/\$\Q$us\E/$sv/g;
8752 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8753 # and ${IF}..${ENDIF} with value
8754 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8755 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8757 # Replace $IF..$ELSE..$ENDIF block with first value,
8758 # and $IF..$ENDIF with value
8759 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8760 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8762 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8763 # matching, nothing if not
8764 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8765 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8767 # Replace $IFEQ..$ENDIFEQ block with first value if
8768 # matching, nothing if not
8769 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8770 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8773 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8774 # and ${IF}..${ENDIF} with nothing
8775 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8776 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8778 # Replace $IF..$ELSE..$ENDIF block with second value,
8779 # and $IF..$ENDIF with nothing
8780 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8781 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8783 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8784 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8785 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8789 # Now assume any $IF blocks whose variables are not present in the hash
8790 # evaluate to false.
8791 # $IF...$ELSE x $ENDIF => x
8792 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8793 # $IF...x...$ENDIF => (nothing)
8794 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8795 # ${var} => (nothing)
8796 $rv =~ s/\$\{[A-Z]+\}//g;
8801 =head2 running_in_zone
8803 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8804 disable module and features that are not appropriate, like those that modify
8805 mounted filesystems.
8810 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8811 $gconfig{'os_version'} < 10);
8812 my $zn = `zonename 2>$null_file`;
8814 return $zn && $zn ne "global";
8817 =head2 running_in_vserver
8819 Returns 1 if the current Webmin instance is running in a Linux VServer.
8820 Used to disable modules and features that are not appropriate.
8823 sub running_in_vserver
8825 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8828 open(MTAB, "/etc/mtab");
8830 my ($dev, $mp) = split(/\s+/, $_);
8831 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8840 =head2 running_in_xen
8842 Returns 1 if Webmin is running inside a Xen instance, by looking
8843 at /proc/xen/capabilities.
8848 return 0 if (!-r "/proc/xen/capabilities");
8849 my $cap = &read_file_contents("/proc/xen/capabilities");
8850 return $cap =~ /control_d/ ? 0 : 1;
8853 =head2 running_in_openvz
8855 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8856 at /proc/vz/veinfo for a non-zero line.
8859 sub running_in_openvz
8861 return 0 if (!-r "/proc/vz/veinfo");
8862 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8863 return 0 if (!$lref || !@$lref);
8864 foreach my $l (@$lref) {
8866 my @ll = split(/\s+/, $l);
8867 return 0 if ($ll[0] eq '0');
8872 =head2 list_categories(&modules, [include-empty])
8874 Returns a hash mapping category codes to names, including any custom-defined
8875 categories. The modules parameter must be an array ref of module hash objects,
8876 as returned by get_all_module_infos.
8881 my ($mods, $empty) = @_;
8882 my (%cats, %catnames);
8883 &read_file("$config_directory/webmin.catnames", \%catnames);
8884 foreach my $o (@lang_order_list) {
8885 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8890 foreach my $m (@$mods) {
8891 my $c = $m->{'category'};
8892 next if ($cats{$c});
8893 if (defined($catnames{$c})) {
8894 $cats{$c} = $catnames{$c};
8896 elsif ($text{"category_$c"}) {
8897 $cats{$c} = $text{"category_$c"};
8900 # try to get category name from module ..
8901 my %mtext = &load_language($m->{'dir'});
8902 if ($mtext{"category_$c"}) {
8903 $cats{$c} = $mtext{"category_$c"};
8906 $c = $m->{'category'} = "";
8907 $cats{$c} = $text{"category_$c"};
8914 =head2 is_readonly_mode
8916 Returns 1 if the current user is in read-only mode, and thus all writes
8917 to files and command execution should fail.
8920 sub is_readonly_mode
8922 if (!defined($main::readonly_mode_cache)) {
8923 my %gaccess = &get_module_acl(undef, "");
8924 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8926 return $main::readonly_mode_cache;
8929 =head2 command_as_user(user, with-env?, command, ...)
8931 Returns a command to execute some command as the given user, using the
8932 su statement. If on Linux, the /bin/sh shell is forced in case the user
8933 does not have a valid shell. If with-env is set to 1, the -s flag is added
8934 to the su command to read the user's .profile or .bashrc file.
8939 my ($user, $env, @args) = @_;
8940 my @uinfo = getpwnam($user);
8941 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8942 # User shell doesn't appear to be valid
8943 if ($gconfig{'os_type'} =~ /-linux$/) {
8944 # Use -s /bin/sh to force it
8945 $shellarg = " -s /bin/sh";
8947 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8948 $gconfig{'os_type'} eq 'solaris' &&
8949 $gconfig{'os_version'} >= 11 ||
8950 $gconfig{'os_type'} eq 'macos') {
8951 # Use -m and force /bin/sh
8952 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8956 my $rv = "su".($env ? " -" : "").$shellarg.
8957 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8961 =head2 list_osdn_mirrors(project, file)
8963 This function is now deprecated in favor of letting sourceforge just
8964 redirect to the best mirror, and now just returns their primary download URL.
8967 sub list_osdn_mirrors
8969 my ($project, $file) = @_;
8970 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8972 'mirror' => 'downloads' } );
8975 =head2 convert_osdn_url(url)
8977 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8978 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8979 to a real URL on the sourceforge download redirector.
8982 sub convert_osdn_url
8985 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8986 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8987 # Always use the Sourceforge mail download URL, which does
8988 # a location-based redirect for us
8989 my ($project, $file) = ($1, $2);
8990 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8992 return wantarray ? ( $url, 0 ) : $url;
8995 # Some other source .. don't change
8996 return wantarray ? ( $url, 2 ) : $url;
9000 =head2 get_current_dir
9002 Returns the directory the current process is running in.
9008 if ($gconfig{'os_type'} eq 'windows') {
9021 =head2 supports_users
9023 Returns 1 if the current OS supports Unix user concepts and functions like
9024 su , getpw* and so on. This will be true on Linux and other Unixes, but false
9030 return $gconfig{'os_type'} ne 'windows';
9033 =head2 supports_symlinks
9035 Returns 1 if the current OS supports symbolic and hard links. This will not
9036 be the case on Windows.
9039 sub supports_symlinks
9041 return $gconfig{'os_type'} ne 'windows';
9044 =head2 quote_path(path)
9046 Returns a path with safe quoting for the current operating system.
9052 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
9053 # Windows only supports "" style quoting
9057 return quotemeta($path);
9061 =head2 get_windows_root
9063 Returns the base windows system directory, like c:/windows.
9066 sub get_windows_root
9068 if ($ENV{'SystemRoot'}) {
9069 my $rv = $ENV{'SystemRoot'};
9074 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
9078 =head2 read_file_contents(file)
9080 Given a filename, returns its complete contents as a string. Effectively
9081 the same as the Perl construct `cat file`.
9084 sub read_file_contents
9086 &open_readfile(FILE, $_[0]) || return undef;
9093 =head2 unix_crypt(password, salt)
9095 Performs Unix encryption on a password, using the built-in crypt function or
9096 the Crypt::UnixCrypt module if the former does not work. The salt parameter
9097 must be either an already-hashed password, or a two-character alpha-numeric
9103 my ($pass, $salt) = @_;
9104 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
9105 my $rv = eval "crypt(\$pass, \$salt)";
9107 return $rv if ($rv && !$@);
9108 eval "use Crypt::UnixCrypt";
9110 return Crypt::UnixCrypt::crypt($pass, $salt);
9113 &error("Failed to encrypt password : $err");
9117 =head2 split_quoted_string(string)
9119 Given a string like I<foo "bar baz" quux>, returns the array :
9123 sub split_quoted_string
9127 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
9128 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
9129 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
9136 =head2 write_to_http_cache(url, file|&data)
9138 Updates the Webmin cache with the contents of the given file, possibly also
9139 clearing out old data. Mainly for internal use by http_download.
9142 sub write_to_http_cache
9144 my ($url, $file) = @_;
9145 return 0 if (!$gconfig{'cache_size'});
9147 # Don't cache downloads that look dynamic
9148 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
9152 # Check if the current module should do caching
9153 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9154 # Caching all except some modules
9155 my @mods = split(/\s+/, $1);
9156 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9158 elsif ($gconfig{'cache_mods'}) {
9159 # Only caching some modules
9160 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9161 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9167 $size = length($$file);
9170 my @st = stat($file);
9174 if ($size > $gconfig{'cache_size'}) {
9175 # Bigger than the whole cache - so don't save it
9180 $cfile = "$main::http_cache_directory/$cfile";
9182 # See how much we have cached currently, clearing old files
9184 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
9185 opendir(CACHEDIR, $main::http_cache_directory);
9186 foreach my $f (readdir(CACHEDIR)) {
9187 next if ($f eq "." || $f eq "..");
9188 my $path = "$main::http_cache_directory/$f";
9189 my @st = stat($path);
9190 if ($gconfig{'cache_days'} &&
9191 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9192 # This file is too old .. trash it
9197 push(@cached, [ $path, $st[7], $st[9] ]);
9201 @cached = sort { $a->[2] <=> $b->[2] } @cached;
9202 while($total+$size > $gconfig{'cache_size'} && @cached) {
9203 # Cache is too big .. delete some files until the new one will fit
9204 unlink($cached[0]->[0]);
9205 $total -= $cached[0]->[1];
9209 # Finally, write out the new file
9211 &open_tempfile(CACHEFILE, ">$cfile");
9212 &print_tempfile(CACHEFILE, $$file);
9213 &close_tempfile(CACHEFILE);
9216 my ($ok, $err) = ©_source_dest($file, $cfile);
9222 =head2 check_in_http_cache(url)
9224 If some URL is in the cache and valid, return the filename for it. Mainly
9225 for internal use by http_download.
9228 sub check_in_http_cache
9231 return undef if (!$gconfig{'cache_size'});
9233 # Check if the current module should do caching
9234 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9235 # Caching all except some modules
9236 my @mods = split(/\s+/, $1);
9237 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9239 elsif ($gconfig{'cache_mods'}) {
9240 # Only caching some modules
9241 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9242 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9247 $cfile = "$main::http_cache_directory/$cfile";
9248 my @st = stat($cfile);
9249 return undef if (!@st || !$st[7]);
9250 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9255 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9260 =head2 supports_javascript
9262 Returns 1 if the current browser is assumed to support javascript.
9265 sub supports_javascript
9267 if (defined(&theme_supports_javascript)) {
9268 return &theme_supports_javascript();
9270 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9273 =head2 get_module_name
9275 Returns the name of the Webmin module that called this function. For internal
9276 use only by other API functions.
9281 return &get_module_variable('$module_name');
9284 =head2 get_module_variable(name, [ref])
9286 Returns the value of some variable which is set in the caller's context, if
9287 using the new WebminCore package. For internal use only.
9290 sub get_module_variable
9292 my ($v, $wantref) = @_;
9293 my $slash = $wantref ? "\\" : "";
9294 my $thispkg = &web_libs_package();
9295 if ($thispkg eq 'WebminCore') {
9296 my ($vt, $vn) = split('', $v, 2);
9298 for(my $i=0; ($callpkg) = caller($i); $i++) {
9299 last if ($callpkg ne $thispkg);
9301 return eval "${slash}${vt}${callpkg}::${vn}";
9303 return eval "${slash}${v}";
9306 =head2 clear_time_locale()
9308 Temporarily force the locale to C, until reset_time_locale is called. This is
9309 useful if your code is going to call C<strftime> from the POSIX package, and
9310 you want to ensure that the output is in a consistent format.
9313 sub clear_time_locale
9315 if ($main::clear_time_locale_count == 0) {
9318 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9319 POSIX::setlocale(POSIX::LC_TIME, "C");
9322 $main::clear_time_locale_count++;
9325 =head2 reset_time_locale()
9327 Revert the locale to whatever it was before clear_time_locale was called
9330 sub reset_time_locale
9332 if ($main::clear_time_locale_count == 1) {
9334 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9335 $main::clear_time_locale_old = undef;
9338 $main::clear_time_locale_count--;
9341 =head2 callers_package(filehandle)
9343 Convert a non-module filehandle like FOO to one qualified with the
9344 caller's caller's package, like fsdump::FOO. For internal use only.
9350 my $callpkg = (caller(1))[0];
9351 my $thispkg = &web_libs_package();
9352 if (!ref($fh) && $fh !~ /::/ &&
9353 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9354 $fh = $callpkg."::".$fh;
9359 =head2 web_libs_package()
9361 Returns the package this code is in. We can't always trust __PACKAGE__. For
9365 sub web_libs_package
9367 if ($called_from_webmin_core) {
9368 return "WebminCore";
9373 =head2 get_userdb_string
9375 Returns the URL-style string for connecting to the users and groups database
9378 sub get_userdb_string
9380 return undef if ($main::no_miniserv_userdb);
9382 &get_miniserv_config(\%miniserv);
9383 return $miniserv{'userdb'};
9386 =head2 connect_userdb(string)
9388 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9389 On failure returns an error message string. In an array context, returns the
9396 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9397 if ($proto eq "mysql") {
9398 # Connect to MySQL with DBI
9399 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9400 $drh || return $text{'sql_emysqldriver'};
9401 my ($host, $port) = split(/:/, $host);
9402 my $cstr = "database=$prefix;host=$host";
9403 $cstr .= ";port=$port" if ($port);
9404 my $dbh = $drh->connect($cstr, $user, $pass, { });
9405 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9406 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9408 elsif ($proto eq "postgresql") {
9409 # Connect to PostgreSQL with DBI
9410 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9411 $drh || return $text{'sql_epostgresqldriver'};
9412 my ($host, $port) = split(/:/, $host);
9413 my $cstr = "dbname=$prefix;host=$host";
9414 $cstr .= ";port=$port" if ($port);
9415 my $dbh = $drh->connect($cstr, $user, $pass);
9416 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9417 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9419 elsif ($proto eq "ldap") {
9420 # Connect with perl LDAP module
9421 eval "use Net::LDAP";
9422 $@ && return $text{'sql_eldapdriver'};
9423 my ($host, $port) = split(/:/, $host);
9424 my $scheme = $args->{'scheme'} || 'ldap';
9426 $port = $scheme eq 'ldaps' ? 636 : 389;
9428 my $ldap = Net::LDAP->new($host,
9430 'scheme' => $scheme);
9431 $ldap || return &text('sql_eldapconnect', $host);
9433 if ($args->{'tls'}) {
9434 # Switch to TLS mode
9435 eval { $mesg = $ldap->start_tls(); };
9436 if ($@ || !$mesg || $mesg->code) {
9437 return &text('sql_eldaptls',
9438 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9441 # Login to the server
9443 $mesg = $ldap->bind(dn => $user, password => $pass);
9446 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9448 if (!$mesg || $mesg->code) {
9449 return &text('sql_eldaplogin', $user,
9450 $mesg ? $mesg->error : "Unknown error");
9452 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9455 return "Unknown protocol $proto";
9459 =head2 disconnect_userdb(string, &handle)
9461 Closes a handle opened by connect_userdb
9464 sub disconnect_userdb
9467 if ($str =~ /^(mysql|postgresql):/) {
9469 if (!$h->{'AutoCommit'}) {
9474 elsif ($str =~ /^ldap:/) {
9481 =head2 split_userdb_string(string)
9483 Converts a string like mysql://user:pass@host/db into separate parts
9486 sub split_userdb_string
9489 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9490 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9491 ($1, $2, $3, $4, $5, $7);
9492 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9493 return ($proto, $user, $pass, $host, $prefix, \%args);
9498 $done_web_lib_funcs = 1;