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 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
20 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
21 %done_foreign_require $webmin_feedback_address
22 $user_skill_level $pragma_no_cache $foreign_args);
24 use vars qw($module_index_name $number_to_month_map $month_to_number_map
25 $umask_already $default_charset $licence_status $os_type
26 $licence_message $script_name $loaded_theme_oo_library
27 $done_web_lib_funcs $os_version $module_index_link
28 $called_from_webmin_core);
30 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
32 Fill the given hash reference with name=value pairs from a file. The required
35 =item file - The file to head, which must be text with each line like name=value
37 =item hash - The hash reference to add values read from the file to.
39 =item order - If given, an array reference to add names to in the order they were read
41 =item lowercase - If set to 1, names are converted to lower case
43 =item split-char - If set, names and values are split on this character instead of =
49 my $split = defined($_[4]) ? $_[4] : "=";
50 my $realfile = &translate_filename($_[0]);
51 &open_readfile(ARFILE, $_[0]) || return 0;
54 my $hash = index($_, "#");
55 my $eq = index($_, $split);
56 if ($hash != 0 && $eq >= 0) {
57 my $n = substr($_, 0, $eq);
58 my $v = substr($_, $eq+1);
60 $_[1]->{$_[3] ? lc($n) : $n} = $v;
61 push(@{$_[2]}, $n) if ($_[2]);
65 $main::read_file_missing{$realfile} = 0; # It exists now
66 if (defined($main::read_file_cache{$realfile})) {
67 %{$main::read_file_cache{$realfile}} = %{$_[1]};
72 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
74 Like read_file, but reads from an in-memory cache if the file has already been
75 read in this Webmin script. Recommended, as it behaves exactly the same as
76 read_file, but can be much faster.
81 my $realfile = &translate_filename($_[0]);
82 if (defined($main::read_file_cache{$realfile})) {
84 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
87 elsif ($main::read_file_missing{$realfile}) {
88 # Doesn't exist, so don't re-try read
92 # Actually read the file
94 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
95 %{$main::read_file_cache{$realfile}} = %d;
96 %{$_[1]} = ( %{$_[1]}, %d );
100 # Flag as non-existant
101 $main::read_file_missing{$realfile} = 1;
107 =head2 write_file(file, &hash, [join-char])
109 Write out the contents of a hash as name=value lines. The parameters are :
111 =item file - Full path to write to
113 =item hash - A hash reference containing names and values to output
115 =item join-char - If given, names and values are separated by this instead of =
121 my $join = defined($_[2]) ? $_[2] : "=";
122 my $realfile = &translate_filename($_[0]);
123 &read_file($_[0], \%old, \@order);
124 &open_tempfile(ARFILE, ">$_[0]");
125 foreach $k (@order) {
126 if (exists($_[1]->{$k})) {
127 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
128 &error(&text("efilewrite", $realfile, $!));
131 foreach $k (keys %{$_[1]}) {
132 if (!exists($old{$k})) {
133 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
134 &error(&text("efilewrite", $realfile, $!));
137 &close_tempfile(ARFILE);
138 if (defined($main::read_file_cache{$realfile})) {
139 %{$main::read_file_cache{$realfile}} = %{$_[1]};
141 if (defined($main::read_file_missing{$realfile})) {
142 $main::read_file_missing{$realfile} = 0;
146 =head2 html_escape(string)
148 Converts &, < and > codes in text to HTML entities, and returns the new string.
149 This should be used when including data read from other sources in HTML pages.
158 $tmp =~ s/\"/"/g;
159 $tmp =~ s/\'/'/g;
164 =head2 quote_escape(string, [only-quote])
166 Converts ' and " characters in a string into HTML entities, and returns it.
167 Useful for outputing HTML tag values.
172 my ($tmp, $only) = @_;
173 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
174 # convert &, unless it is part of &#nnn; or &foo;
175 $tmp =~ s/&([^#])/&$1/g;
177 $tmp =~ s/&$/&/g;
178 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
179 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
183 =head2 tempname([filename])
185 Returns a mostly random temporary file name, typically under the /tmp/.webmin
186 directory. If filename is given, this will be the base name used. Otherwise
187 a unique name is selected randomly.
192 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
193 $gconfig{'tempdir_'.&get_module_name()} :
194 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
195 $ENV{'TEMP'} ? $ENV{'TEMP'} :
196 $ENV{'TMP'} ? $ENV{'TMP'} :
197 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
198 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
199 "$remote_user_info[7]/.tmp" :
200 @remote_user_info ? $tmp_base."-".$remote_user :
201 $< != 0 ? $tmp_base."-".getpwuid($<) :
203 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
204 # On Windows system, just create temp dir if missing
206 mkdir($tmp_dir, 0755) ||
207 &error("Failed to create temp directory $tmp_dir : $!");
211 # On Unix systems, need to make sure temp dir is valid
213 while($tries++ < 10) {
214 my @st = lstat($tmp_dir);
215 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
217 unlink($tmp_dir) || rmdir($tmp_dir) ||
218 system("/bin/rm -rf ".quotemeta($tmp_dir));
220 mkdir($tmp_dir, 0755) || next;
221 chown($<, $(, $tmp_dir);
222 chmod(0755, $tmp_dir);
225 my @st = lstat($tmp_dir);
226 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
230 if (defined($_[0]) && $_[0] !~ /\.\./) {
231 $rv = "$tmp_dir/$_[0]";
234 $main::tempfilecount++;
236 $rv = $tmp_dir."/".int(rand(1000000))."_".
237 $main::tempfilecount."_".$scriptname;
242 =head2 transname([filename])
244 Behaves exactly like tempname, but records the temp file for deletion when the
245 current Webmin script process exits.
250 my $rv = &tempname(@_);
251 push(@main::temporary_files, $rv);
255 =head2 trunc(string, maxlen)
257 Truncates a string to the shortest whole word less than or equal to the
258 given width. Useful for word wrapping.
263 if (length($_[0]) <= $_[1]) {
266 my $str = substr($_[0],0,$_[1]);
275 =head2 indexof(string, value, ...)
277 Returns the index of some value in an array of values, or -1 if it was not
283 for(my $i=1; $i <= $#_; $i++) {
284 if ($_[$i] eq $_[0]) { return $i - 1; }
289 =head2 indexoflc(string, value, ...)
291 Like indexof, but does a case-insensitive match
296 my $str = lc(shift(@_));
297 my @arr = map { lc($_) } @_;
298 return &indexof($str, @arr);
301 =head2 sysprint(handle, [string]+)
303 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
304 as a replacement for print when writing to pipes or sockets.
309 my $fh = &callers_package($_[0]);
310 my $str = join('', @_[1..$#_]);
311 syswrite $fh, $str, length($str);
314 =head2 check_ipaddress(ip)
316 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
321 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
322 $1 >= 0 && $1 <= 255 &&
323 $2 >= 0 && $2 <= 255 &&
324 $3 >= 0 && $3 <= 255 &&
325 $4 >= 0 && $4 <= 255;
328 =head2 check_ip6address(ip)
330 Check if some IPv6 address is properly formatted, and returns 1 if so.
335 my @blocks = split(/:/, $_[0]);
336 return 0 if (@blocks == 0 || @blocks > 8);
338 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
339 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
340 # value is in [0;128].
342 my $where = index($blocks[$ib],"/");
345 my $b = substr($blocks[$ib],0,$where);
346 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
350 # The netmask must take its value in [0;128]
351 return 0 if ($m <0 || $m >128);
353 # Check the different blocks of the address : 16 bits block in hexa notation.
354 # Possibility of 1 empty block or 2 if the address begins with "::".
357 foreach $b (@blocks) {
358 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
359 $empty++ if ($b eq "");
361 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
367 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
369 Prints HTML for an icon image. The parameters are :
371 =item image - URL for the image, like images/foo.gif
373 =item title - Text to appear under the icon
375 =item link - Optional destination for the icon's link
377 =item href - Other HTML attributes to be added to the <a href> for the link
379 =item width - Optional width of the icon
381 =item height - Optional height of the icon
383 =item before-title - HTML to appear before the title link, but which is not actually in the link
385 =item after-title - HTML to appear after the title link, but which is not actually in the link
390 &load_theme_library();
391 if (defined(&theme_generate_icon)) {
392 &theme_generate_icon(@_);
395 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
396 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
397 if ($tconfig{'noicons'}) {
399 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
402 print "$_[6]$_[1]$_[7]\n";
406 print "<table border><tr><td width=48 height=48>\n",
407 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
408 "$w $h></a></td></tr></table>\n";
409 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
412 print "<table border><tr><td width=48 height=48>\n",
413 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
414 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
420 Converts a string to a form ok for putting in a URL, using % escaping.
426 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
430 =head2 un_urlize(string)
432 Converts a URL-encoded string to it's original contents - the reverse of the
440 $rv =~ s/%(..)/pack("c",hex($1))/ge;
444 =head2 include(filename)
446 Read and output the contents of the given file.
452 open(INCLUDE, &translate_filename($_[0])) || return 0;
460 =head2 copydata(in-handle, out-handle)
462 Read from one file handle and write to another, until there is no more to read.
468 $in = &callers_package($in);
469 $out = &callers_package($out);
471 while(read($in, $buf, 1024) > 0) {
472 (print $out $buf) || return 0;
477 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
479 Read data submitted via a POST request using the multipart/form-data coding,
480 and store it in the global %in hash. The optional parameters are :
482 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
484 =item cbfunc - A function reference to call after reading each block of data.
486 =item cbargs - Additional parameters to the callback function.
491 my ($max, $cbfunc, $cbargs) = @_;
492 my ($boundary, $line, $foo, $name, $got, $file);
493 my $err = &text('readparse_max', $max);
494 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
495 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
498 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
500 <STDIN>; # skip first boundary
503 # Read section headers
507 $got += length($line);
508 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
509 if ($max && $got > $max) {
514 if ($line =~ /^(\S+):\s*(.*)$/) {
515 $header{$lastheader = lc($1)} = $2;
517 elsif ($line =~ /^\s+(.*)$/) {
518 $header{$lastheader} .= $line;
522 # Parse out filename and type
523 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
525 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
530 $foo = $name . "_$1";
537 &error($text{'readparse_cdheader'});
539 if ($header{'content-type'} =~ /^([^\s;]+)/) {
540 $foo = $name . "_content_type";
543 $file = $in{$name."_filename"};
546 $in{$name} .= "\0" if (defined($in{$name}));
549 $got += length($line);
550 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
552 if ($max && $got > $max) {
553 #print STDERR "over limit of $max\n";
558 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
563 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
564 if (index($line, $boundary) != -1) { last; }
567 chop($in{$name}); chop($in{$name});
568 if (index($line,"$boundary--") != -1) { last; }
570 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
573 =head2 ReadParse([&hash], [method], [noplus])
575 Fills the given hash reference with CGI parameters, or uses the global hash
576 %in if none is given. Also sets the global variables $in and @in. The other
579 =item method - For use of this HTTP method, such as GET
581 =item noplus - Don't convert + in parameters to spaces.
586 my $a = $_[0] || \%in;
588 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
590 if ($meth eq 'POST') {
591 my $clen = $ENV{'CONTENT_LENGTH'};
592 &read_fully(STDIN, \$in, $clen) == $clen ||
593 &error("Failed to read POST input : $!");
595 if ($ENV{'QUERY_STRING'}) {
596 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
597 else { $in = $ENV{'QUERY_STRING'}; }
599 @in = split(/\&/, $in);
600 foreach my $i (@in) {
601 my ($k, $v) = split(/=/, $i, 2);
606 $k =~ s/%(..)/pack("c",hex($1))/ge;
607 $v =~ s/%(..)/pack("c",hex($1))/ge;
608 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
612 =head2 read_fully(fh, &buffer, length)
614 Read data from some file handle up to the given length, even in the face
615 of partial reads. Reads the number of bytes read. Stores received data in the
616 string pointed to be the buffer reference.
621 my ($fh, $buf, $len) = @_;
622 $fh = &callers_package($fh);
625 my $r = read(STDIN, $$buf, $len-$got, $got);
632 =head2 read_parse_mime_callback(size, totalsize, upload-id)
634 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
635 the file on every 1% change though. For internal use by the upload progress
639 sub read_parse_mime_callback
641 my ($size, $totalsize, $filename, $id) = @_;
642 return if ($gconfig{'no_upload_tracker'});
645 # Create the upload tracking directory - if running as non-root, this has to
646 # be under the user's home
649 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
650 $vardir = "$uinfo[7]/.tmp";
653 $vardir = $ENV{'WEBMIN_VAR'};
656 &make_dir($vardir, 0755);
659 # Remove any upload.* files more than 1 hour old
660 if (!$main::read_parse_mime_callback_flushed) {
662 opendir(UPDIR, $vardir);
663 foreach my $f (readdir(UPDIR)) {
664 next if ($f !~ /^upload\./);
665 my @st = stat("$vardir/$f");
666 if ($st[9] < $now-3600) {
667 unlink("$vardir/$f");
671 $main::read_parse_mime_callback_flushed++;
674 # Only update file once per percent
675 my $upfile = "$vardir/upload.$id";
676 if ($totalsize && $size >= 0) {
677 my $pc = int(100 * $size / $totalsize);
678 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
681 $main::read_parse_mime_callback_pc{$upfile} = $pc;
685 &open_tempfile(UPFILE, ">$upfile");
686 print UPFILE $size,"\n";
687 print UPFILE $totalsize,"\n";
688 print UPFILE $filename,"\n";
689 &close_tempfile(UPFILE);
692 =head2 read_parse_mime_javascript(upload-id, [&fields])
694 Returns an onSubmit= Javascript statement to popup a window for tracking
695 an upload with the given ID. For internal use by the upload progress tracker.
698 sub read_parse_mime_javascript
700 my ($id, $fields) = @_;
701 return "" if ($gconfig{'no_upload_tracker'});
702 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
704 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
705 return "onSubmit='if ($if) { $opener }'";
708 return "onSubmit='$opener'";
712 =head2 PrintHeader(charset)
714 Outputs the HTTP headers for an HTML page. The optional charset parameter
715 can be used to set a character set. Normally this function is not called
716 directly, but is rather called by ui_print_header or header.
721 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
722 print "pragma: no-cache\n";
723 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
724 print "Cache-Control: no-store, no-cache, must-revalidate\n";
725 print "Cache-Control: post-check=0, pre-check=0\n";
727 if (defined($_[0])) {
728 print "Content-type: text/html; Charset=$_[0]\n\n";
731 print "Content-type: text/html\n\n";
735 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
737 Outputs a Webmin HTML page header with a title, including HTTP headers. The
740 =item title - The text to show at the top of the page
742 =item image - An image to show instead of the title text. This is typically left blank.
744 =item help - If set, this is the name of a help page that will be linked to in the title.
746 =item config - If set to 1, the title will contain a link to the module's config page.
748 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
750 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
752 =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.
754 =item head-stuff - HTML to be included in the <head> section of the page.
756 =item body-stuff - HTML attributes to be include in the <body> tag.
758 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
763 return if ($main::done_webmin_header++);
765 my $charset = defined($main::force_charset) ? $main::force_charset
767 &PrintHeader($charset);
768 &load_theme_library();
769 if (defined(&theme_header)) {
770 $module_name = &get_module_name();
774 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
777 if (defined(&theme_prehead)) {
781 print "<meta http-equiv=\"Content-Type\" ",
782 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
785 my $title = &get_html_title($_[0]);
786 print "<title>$title</title>\n";
787 print $_[7] if ($_[7]);
788 print &get_html_status_line(0);
790 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
791 if ($tconfig{'headinclude'}) {
792 print &read_file_contents(
793 "$theme_root_directory/$tconfig{'headinclude'}");
796 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
797 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
798 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
799 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
800 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
801 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
802 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
804 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
806 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
807 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
808 if (defined(&theme_prebody)) {
811 my $hostname = &get_display_hostname();
812 my $version = &get_webmin_version();
813 my $prebody = $tconfig{'prebody'};
815 $prebody =~ s/%HOSTNAME%/$hostname/g;
816 $prebody =~ s/%VERSION%/$version/g;
817 $prebody =~ s/%USER%/$remote_user/g;
818 $prebody =~ s/%OS%/$os_type $os_version/g;
821 if ($tconfig{'prebodyinclude'}) {
823 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
830 print $tconfig{'preheader'};
831 my %this_module_info = &get_module_info(&get_module_name());
832 print "<table class='header' width=100%><tr>\n";
833 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
834 print "<td id='headln1' colspan=3 align=center>\n";
835 print &get_html_status_line(1);
836 print "</td></tr> <tr>\n";
838 print "<td id='headln2l' width=15% valign=top align=left>";
839 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
840 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
841 "$text{'header_servers'}</a><br>\n";
843 if (!$_[5] && !$tconfig{'noindex'}) {
844 my @avail = &get_available_module_infos(1);
845 my $nolo = $ENV{'ANONYMOUS_USER'} ||
846 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
847 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
848 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
850 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
851 "$text{'main_logout'}</a><br>";
853 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
854 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
855 "$text{'main_switch'}</a><br>";
857 elsif (!$gconfig{'gotoone'} || @avail > 1) {
858 print "<a href='$gconfig{'webprefix'}/?cat=",
859 $this_module_info{'category'},
860 "'>$text{'header_webmin'}</a><br>\n";
863 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
864 my $idx = $this_module_info{'index_link'};
865 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
866 my $mt = $module_index_name || $text{'header_module'};
867 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
869 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
870 !$tconfig{'nohelp'}) {
871 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
874 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
875 !$tconfig{'nohelp'}) {
876 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
879 my %access = &get_module_acl();
880 if (!$access{'noconfig'} && !$config{'noprefs'}) {
881 my $cprog = $user_module_config_directory ?
882 "uconfig.cgi" : "config.cgi";
883 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
884 &get_module_name()."\">",
885 $text{'header_config'},"</a><br>\n";
890 # Title is a single image
891 print "<td id='headln2c' align=center width=70%>",
892 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
896 my $ts = defined($tconfig{'titlesize'}) ?
897 $tconfig{'titlesize'} : "+2";
898 print "<td id='headln2c' align=center width=70%>",
899 ($ts ? "<font size=$ts>" : ""),$_[0],
900 ($ts ? "</font>" : "");
901 print "<br>$_[9]\n" if ($_[9]);
904 print "<td id='headln2r' width=15% valign=top align=right>";
906 print "</td></tr></table>\n";
907 print $tconfig{'postheader'};
911 =head2 get_html_title(title)
913 Returns the full string to appear in the HTML <title> block.
920 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
921 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
922 my $host = &get_display_hostname();
923 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
924 $title = sprintf "%s : %s on %s (%s %s)\n",
925 $msg, $remote_user, $host,
926 $os_type, $os_version;
928 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
929 $title = sprintf "%s on %s (%s %s)\n",
931 $os_type, $os_version;
936 if ($gconfig{'showlogin'} && $remote_user) {
937 $title = $remote_user.($title ? " : ".$title : "");
939 if ($gconfig{'showhost'}) {
940 $title = $host.($title ? " : ".$title : "");
945 =head2 get_html_framed_title
947 Returns the title text for a framed theme main page.
950 sub get_html_framed_title
953 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
954 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
956 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
957 # Alternate title mode requested
958 $title = sprintf "%s on %s (%s %s)\n",
959 $remote_user, &get_display_hostname(),
960 $os_type, $os_version;
963 # Title like 'Webmin x.yy on hostname (Linux 6)'
964 if ($os_version eq "*") {
968 $ostr = "$os_type $os_version";
970 my $host = &get_display_hostname();
971 my $ver = &get_webmin_version();
972 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
973 $gconfig{'showhost'} ? &text('main_title3', $ver, $ostr) :
974 &text('main_title', $ver, $host, $ostr);
975 if ($gconfig{'showlogin'}) {
976 $title = $remote_user.($title ? " : ".$title : "");
978 if ($gconfig{'showhost'}) {
979 $title = $host.($title ? " : ".$title : "");
985 =head2 get_html_status_line(text-only)
987 Returns HTML for a script block that sets the status line, or if text-only
988 is set to 1, just return the status line text.
991 sub get_html_status_line
994 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
995 # Disabled in this mode
998 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
999 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
1000 my $line = &text('header_statusmsg',
1001 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
1003 ($ENV{'SSL_USER'} ? " (SSL certified)" :
1004 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1005 $text{'programname'},
1006 &get_webmin_version(),
1007 &get_display_hostname(),
1008 $os_type.($os_version eq "*" ? "" :" $os_version"));
1013 $line =~ s/\r|\n//g;
1014 return "<script language=JavaScript type=text/javascript>\n".
1015 "defaultStatus=\""."e_escape($line)."\";\n".
1020 =head2 popup_header([title], [head-stuff], [body-stuff], [no-body])
1022 Outputs a page header, suitable for a popup window. If no title is given,
1023 absolutely no decorations are output. Also useful in framesets. The parameters
1026 =item title - Title text for the popup window.
1028 =item head-stuff - HTML to appear in the <head> section.
1030 =item body-stuff - HTML attributes to be include in the <body> tag.
1032 =item no-body - If set to 1, don't generate a body tag
1037 return if ($main::done_webmin_header++);
1039 my $charset = defined($main::force_charset) ? $main::force_charset
1041 &PrintHeader($charset);
1042 &load_theme_library();
1043 if (defined(&theme_popup_header)) {
1044 &theme_popup_header(@_);
1047 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1050 if (defined(&theme_popup_prehead)) {
1051 &theme_popup_prehead(@_);
1053 print "<title>$_[0]</title>\n";
1055 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1056 if ($tconfig{'headinclude'}) {
1057 print &read_file_contents(
1058 "$theme_root_directory/$tconfig{'headinclude'}");
1061 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1062 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1063 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1064 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1065 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1066 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1067 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1070 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1071 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1072 if (defined(&theme_popup_prebody)) {
1073 &theme_popup_prebody(@_);
1078 =head2 footer([page, name]+, [noendbody])
1080 Outputs the footer for a Webmin HTML page, possibly with links back to other
1081 pages. The links are specified by pairs of parameters, the first of which is
1082 a link destination, and the second the link text. For example :
1084 footer('/', 'Webmin index', '', 'Module menu');
1089 &load_theme_library();
1090 my %this_module_info = &get_module_info(&get_module_name());
1091 if (defined(&theme_footer)) {
1092 $module_name = &get_module_name(); # Old themes use these
1093 %module_info = %this_module_info;
1097 for(my $i=0; $i+1<@_; $i+=2) {
1099 if ($url ne '/' || !$tconfig{'noindex'}) {
1101 $url = "/?cat=$this_module_info{'category'}";
1103 elsif ($url eq '' && &get_module_name()) {
1104 $url = "/".&get_module_name()."/".
1105 $this_module_info{'index_link'};
1107 elsif ($url =~ /^\?/ && &get_module_name()) {
1108 $url = "/".&get_module_name()."/$url";
1110 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1112 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1117 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1122 my $postbody = $tconfig{'postbody'};
1124 my $hostname = &get_display_hostname();
1125 my $version = &get_webmin_version();
1126 my $os_type = $gconfig{'real_os_type'} ||
1127 $gconfig{'os_type'};
1128 my $os_version = $gconfig{'real_os_version'} ||
1129 $gconfig{'os_version'};
1130 $postbody =~ s/%HOSTNAME%/$hostname/g;
1131 $postbody =~ s/%VERSION%/$version/g;
1132 $postbody =~ s/%USER%/$remote_user/g;
1133 $postbody =~ s/%OS%/$os_type $os_version/g;
1134 print "$postbody\n";
1136 if ($tconfig{'postbodyinclude'}) {
1138 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1144 if (defined(&theme_postbody)) {
1145 &theme_postbody(@_);
1147 print "</body></html>\n";
1151 =head2 popup_footer([no-body])
1153 Outputs html for a footer for a popup window, started by popup_header.
1158 &load_theme_library();
1159 if (defined(&theme_popup_footer)) {
1160 &theme_popup_footer(@_);
1169 =head2 load_theme_library
1171 Immediately loads the current theme's theme.pl file. Not generally useful for
1172 most module developers, as this is called automatically by the header function.
1175 sub load_theme_library
1177 return if (!$current_theme || $loaded_theme_library++);
1178 for(my $i=0; $i<@theme_root_directories; $i++) {
1179 if ($theme_configs[$i]->{'functions'}) {
1180 do $theme_root_directories[$i]."/".
1181 $theme_configs[$i]->{'functions'};
1186 =head2 redirect(url)
1188 Output HTTP headers to redirect the browser to some page. The url parameter is
1189 typically a relative URL like index.cgi or list_users.cgi.
1194 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1195 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1196 ":$ENV{'SERVER_PORT'}";
1197 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1198 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1200 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1201 # Absolute URL (like http://...)
1204 elsif ($_[0] =~ /^\//) {
1205 # Absolute path (like /foo/bar.cgi)
1206 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1208 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1209 # Relative URL (like foo.cgi)
1210 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1213 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1215 &load_theme_library();
1216 if (defined(&theme_redirect)) {
1217 $module_name = &get_module_name(); # Old themes use these
1218 %module_info = &get_module_info($module_name);
1219 &theme_redirect($_[0], $url);
1222 print "Location: $url\n\n";
1226 =head2 kill_byname(name, signal)
1228 Finds a process whose command line contains the given name (such as httpd), and
1229 sends some signal to it. The signal can be numeric (like 9) or named
1235 my @pids = &find_byname($_[0]);
1236 return scalar(@pids) if (&is_readonly_mode());
1237 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1238 if ($gconfig{'debug_what_procs'});
1239 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1243 =head2 kill_byname_logged(name, signal)
1245 Like kill_byname, but also logs the killing.
1248 sub kill_byname_logged
1250 my @pids = &find_byname($_[0]);
1251 return scalar(@pids) if (&is_readonly_mode());
1252 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1256 =head2 find_byname(name)
1258 Finds processes searching for the given name in their command lines, and
1259 returns a list of matching PIDs.
1264 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1265 # Linux with /proc filesystem .. use cmdline files, as this is
1266 # faster than forking
1268 opendir(PROCDIR, "/proc");
1269 foreach my $f (readdir(PROCDIR)) {
1270 if ($f eq int($f) && $f != $$) {
1271 my $line = &read_file_contents("/proc/$f/cmdline");
1272 if ($line =~ /$_[0]/) {
1281 if (&foreign_check("proc")) {
1282 # Call the proc module
1283 &foreign_require("proc", "proc-lib.pl");
1284 if (defined(&proc::list_processes)) {
1285 my @procs = &proc::list_processes();
1287 foreach my $p (@procs) {
1288 if ($p->{'args'} =~ /$_[0]/) {
1289 push(@pids, $p->{'pid'});
1292 @pids = grep { $_ != $$ } @pids;
1297 # Fall back to running a command
1299 $cmd = $gconfig{'find_pid_command'};
1300 $cmd =~ s/NAME/"$_[0]"/g;
1301 $cmd = &translate_command($cmd);
1302 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1303 @pids = grep { $_ != $$ } @pids;
1307 =head2 error([message]+)
1309 Display an error message and exit. This should be used by CGI scripts that
1310 encounter a fatal error or invalid user input to notify users of the problem.
1311 If error_setup has been called, the displayed error message will be prefixed
1312 by the message setup using that function.
1317 my $msg = join("", @_);
1318 $msg =~ s/<[^>]*>//g;
1319 if (!$main::error_must_die) {
1320 print STDERR "Error: ",$msg,"\n";
1322 &load_theme_library();
1323 if ($main::error_must_die) {
1324 if ($gconfig{'error_stack'}) {
1325 print STDERR "Error: ",$msg,"\n";
1326 for(my $i=0; my @stack = caller($i); $i++) {
1327 print STDERR "File: $stack[1] Line: $stack[2] ",
1328 "Function: $stack[3]\n";
1333 elsif (!$ENV{'REQUEST_METHOD'}) {
1334 # Show text-only error
1335 print STDERR "$text{'error'}\n";
1336 print STDERR "-----\n";
1337 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1339 print STDERR "-----\n";
1340 if ($gconfig{'error_stack'}) {
1342 print STDERR $text{'error_stack'},"\n";
1343 for(my $i=0; my @stack = caller($i); $i++) {
1344 print STDERR &text('error_stackline',
1345 $stack[1], $stack[2], $stack[3]),"\n";
1350 elsif (defined(&theme_error)) {
1354 &header($text{'error'}, "");
1356 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1358 if ($gconfig{'error_stack'}) {
1360 print "<h3>$text{'error_stack'}</h3>\n";
1362 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1363 "<td><b>$text{'error_line'}</b></td> ",
1364 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1365 for($i=0; my @stack = caller($i); $i++) {
1367 print "<td>$stack[1]</td>\n";
1368 print "<td>$stack[2]</td>\n";
1369 print "<td>$stack[3]</td>\n";
1375 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1376 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1382 &unlock_all_files();
1383 &cleanup_tempnames();
1387 =head2 popup_error([message]+)
1389 This function is almost identical to error, but displays the message with HTML
1390 headers suitable for a popup window.
1395 &load_theme_library();
1396 if ($main::error_must_die) {
1399 elsif (defined(&theme_popup_error)) {
1400 &theme_popup_error(@_);
1403 &popup_header($text{'error'}, "");
1404 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1407 &unlock_all_files();
1408 &cleanup_tempnames();
1412 =head2 error_setup(message)
1414 Registers a message to be prepended to all error messages displayed by the
1420 $main::whatfailed = $_[0];
1423 =head2 wait_for(handle, regexp, regexp, ...)
1425 Reads from the input stream until one of the regexps matches, and returns the
1426 index of the matching regexp, or -1 if input ended before any matched. This is
1427 very useful for parsing the output of interactive programs, and can be used with
1428 a two-way pipe to feed input to a program in response to output matched by
1431 If the matching regexp contains bracketed sub-expressions, their values will
1432 be placed in the global array @matches, indexed starting from 1. You cannot
1433 use the Perl variables $1, $2 and so on to capture matches.
1437 $rv = wait_for($loginfh, "username:");
1439 error("Didn't get username prompt");
1441 print $loginfh "joe\n";
1442 $rv = wait_for($loginfh, "password:");
1444 error("Didn't get password prompt");
1446 print $loginfh "smeg\n";
1451 my ($c, $i, $sw, $rv, $ha);
1452 undef($wait_for_input);
1453 if ($wait_for_debug) {
1454 print STDERR "wait_for(",join(",", @_),")\n";
1456 $ha = &callers_package($_[0]);
1457 if ($wait_for_debug) {
1458 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1463 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1464 " \$wait_for_input .= \$c;\n";
1465 if ($wait_for_debug) {
1466 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1468 for($i=1; $i<@_; $i++) {
1469 $sw = $i>1 ? "elsif" : "if";
1470 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1473 " if (defined(\$hit)) {\n".
1474 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1480 &error("wait_for error : $@\n");
1485 =head2 fast_wait_for(handle, string, string, ...)
1487 This function behaves very similar to wait_for (documented above), but instead
1488 of taking regular expressions as parameters, it takes strings. As soon as the
1489 input contains one of them, it will return the index of the matching string.
1490 If the input ends before any match, it returns -1.
1495 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1496 for($i=1; $i<@_; $i++) {
1497 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1501 if (($c = getc($ha)) eq "") {
1502 &error("fast_wait_for read error : $!");
1505 if (length($inp) > $maxlen) {
1506 $inp = substr($inp, length($inp)-$maxlen);
1508 $inpl = length($inp);
1509 for($i=1; $i<@_; $i++) {
1510 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1517 =head2 has_command(command)
1519 Returns the full path to the executable if some command is in the path, or
1520 undef if not found. If the given command is already an absolute path and
1521 exists, then the same path will be returned.
1526 if (!$_[0]) { return undef; }
1527 if (exists($main::has_command_cache{$_[0]})) {
1528 return $main::has_command_cache{$_[0]};
1531 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1532 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1533 # Absolute path given - just use it
1534 my $t = &translate_filename($_[0]);
1535 $rv = (-x $t && !-d _) ? $_[0] : undef;
1538 # Check each directory in the path
1540 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1541 next if ($donedir{$d}++);
1542 $d =~ s/$slash$// if ($d ne $slash);
1543 my $t = &translate_filename("$d/$_[0]");
1544 if (-x $t && !-d _) {
1545 $rv = $d.$slash.$_[0];
1548 if ($gconfig{'os_type'} eq 'windows') {
1549 foreach my $sfx (".exe", ".com", ".bat") {
1550 my $t = &translate_filename("$d/$_[0]").$sfx;
1551 if (-r $t && !-d _) {
1552 $rv = $d.$slash.$_[0].$sfx;
1559 $main::has_command_cache{$_[0]} = $rv;
1563 =head2 make_date(seconds, [date-only], [fmt])
1565 Converts a Unix date/time in seconds to a human-readable form, by default
1566 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1568 =item seconds - Unix time is seconds to convert.
1570 =item date-only - If set to 1, exclude the time from the returned string.
1572 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1577 my ($secs, $only, $fmt) = @_;
1578 my @tm = localtime($secs);
1581 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1583 if ($fmt eq 'dd/mon/yyyy') {
1584 $date = sprintf "%2.2d/%s/%4.4d",
1585 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1587 elsif ($fmt eq 'dd/mm/yyyy') {
1588 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1590 elsif ($fmt eq 'mm/dd/yyyy') {
1591 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1593 elsif ($fmt eq 'yyyy/mm/dd') {
1594 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1596 elsif ($fmt eq 'd. mon yyyy') {
1597 $date = sprintf "%d. %s %4.4d",
1598 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1600 elsif ($fmt eq 'dd.mm.yyyy') {
1601 $date = sprintf "%2.2d.%2.2d.%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1603 elsif ($fmt eq 'yyyy-mm-dd') {
1604 $date = sprintf "%4.4d-%2.2d-%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1607 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1612 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1614 Return HTML for a button that pops up a file chooser when clicked, and places
1615 the selected filename into another HTML field. The parameters are :
1617 =item input - Name of the form field to store the filename in.
1619 =item type - 0 for file or directory chooser, or 1 for directory only.
1621 =item form - Index of the form containing the button.
1623 =item chroot - If set to 1, the chooser will be limited to this directory.
1625 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1628 sub file_chooser_button
1630 return &theme_file_chooser_button(@_)
1631 if (defined(&theme_file_chooser_button));
1632 my $form = defined($_[2]) ? $_[2] : 0;
1633 my $chroot = defined($_[3]) ? $_[3] : "/";
1634 my $add = int($_[4]);
1635 my ($w, $h) = (400, 300);
1636 if ($gconfig{'db_sizefile'}) {
1637 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1639 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";
1642 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1644 Returns HTML for a button that will popup a chooser window of some kind. The
1647 =item url - Base URL of the popup window's contents
1649 =item width - Width of the window in pixels
1651 =item height - Height in pixels
1653 =item scrollbars - Set to 1 if the window should have scrollbars
1655 The field-mappings parameter is an array ref of array refs containing
1657 =item - Attribute to assign field to in the popup window
1659 =item - Form field name
1661 =item - CGI parameter to URL for value, if any
1664 sub popup_window_button
1666 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1667 my ($url, $w, $h, $scroll, $fields) = @_;
1668 my $scrollyn = $scroll ? "yes" : "no";
1669 my $rv = "<input type=button onClick='";
1670 foreach my $m (@$fields) {
1671 $rv .= "$m->[0] = form.$m->[1]; ";
1673 my $sep = $url =~ /\?/ ? "&" : "?";
1674 $rv .= "chooser = window.open(\"$url\"";
1675 foreach my $m (@$fields) {
1677 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1681 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1682 foreach my $m (@$fields) {
1683 $rv .= "chooser.$m->[0] = $m->[0]; ";
1684 $rv .= "window.$m->[0] = $m->[0]; ";
1686 $rv .= "' value=\"...\">";
1690 =head2 read_acl(&user-module-hash, &user-list-hash)
1692 Reads the Webmin acl file into the given hash references. The first is indexed
1693 by a combined key of username,module , with the value being set to 1 when
1694 the user has access to that module. The second is indexed by username, with
1695 the value being an array ref of allowed modules.
1697 This function is deprecated in favour of foreign_available, which performs a
1698 more comprehensive check of module availability.
1703 if (!%main::acl_hash_cache) {
1704 # Read from local files
1706 open(ACL, &acl_filename());
1708 if (/^([^:]+):\s*(.*)/) {
1710 my @mods = split(/\s+/, $2);
1711 foreach my $m (@mods) {
1712 $main::acl_hash_cache{$user,$m}++;
1714 $main::acl_array_cache{$user} = \@mods;
1720 my $userdb = &get_userdb_string();
1721 my ($dbh, $proto) = $userdb ? &connect_userdb($userdb) : ( );
1723 if ($proto eq "mysql" || $proto eq "postgresql") {
1724 # Select usernames and modules from SQL DB
1725 my $cmd = $dbh->prepare("select webmin_user.name,webmin_user_attr.value from webmin_user,webmin_user_attr where webmin_user.id = webmin_user_attr.id and webmin_user_attr.attr = 'modules'");
1726 if ($cmd && $cmd->execute()) {
1727 while(my ($user, $mods) = $cmd->fetchrow()) {
1728 my @mods = split(/\s+/, $mods);
1729 foreach my $m (@mods) {
1730 $main::acl_hash_cache{$user,
1733 $main::acl_array_cache{$user} = \@mods;
1736 $cmd->finish() if ($cmd);
1738 elsif ($proto eq "ldap") {
1739 # XXX read from LDAP
1741 &disconnect_userdb($userdb, $dbh);
1744 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1745 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1750 Returns the file containing the webmin ACL, which is usually
1751 /etc/webmin/webmin.acl.
1756 return "$config_directory/webmin.acl";
1761 Does nothing, but kept around for compatability.
1768 =head2 get_miniserv_config(&hash)
1770 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1771 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1775 sub get_miniserv_config
1777 return &read_file_cached(
1778 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1781 =head2 put_miniserv_config(&hash)
1783 Writes out the Webmin webserver configuration file from the contents of
1784 the given hash ref. This should be initially populated by get_miniserv_config,
1787 get_miniserv_config(\%miniserv);
1788 $miniserv{'port'} = 10005;
1789 put_miniserv_config(\%miniserv);
1793 sub put_miniserv_config
1795 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1799 =head2 restart_miniserv([nowait])
1801 Kill the old miniserv process and re-start it, then optionally waits for
1802 it to restart. This will apply all configuration settings.
1805 sub restart_miniserv
1808 return undef if (&is_readonly_mode());
1810 &get_miniserv_config(\%miniserv) || return;
1813 if ($gconfig{'os_type'} ne 'windows') {
1814 # On Unix systems, we can restart with a signal
1815 my ($pid, $addr, $i);
1816 $miniserv{'inetd'} && return;
1817 my @oldst = stat($miniserv{'pidfile'});
1818 $pid = $ENV{'MINISERV_PID'};
1820 open(PID, $miniserv{'pidfile'}) ||
1821 &error("Failed to open PID file $miniserv{'pidfile'}");
1824 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1827 # Just signal miniserv to restart
1828 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1830 # Wait till new PID is written, indicating a restart
1831 for($i=0; $i<60; $i++) {
1833 my @newst = stat($miniserv{'pidfile'});
1834 last if ($newst[9] != $oldst[9]);
1836 $i < 60 || &error("Webmin server did not write new PID file");
1838 ## Totally kill the process and re-run it
1839 #$SIG{'TERM'} = 'IGNORE';
1840 #&kill_logged('TERM', $pid);
1841 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1844 # On Windows, we need to use the flag file
1845 open(TOUCH, ">$miniserv{'restartflag'}");
1850 # wait for miniserv to come back up
1851 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1853 for($i=0; $i<20; $i++) {
1855 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1856 my $rv = connect(STEST,
1857 pack_sockaddr_in($miniserv{'port'}, $addr));
1859 last if ($rv && ++$ok >= 2);
1861 $i < 20 || &error("Failed to restart Webmin server!");
1865 =head2 reload_miniserv
1867 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1868 configuration files. Not all changes will be applied though, such as the
1869 IP addresses and ports to accept connections on.
1874 return undef if (&is_readonly_mode());
1876 &get_miniserv_config(\%miniserv) || return;
1878 if ($gconfig{'os_type'} ne 'windows') {
1879 # Send a USR1 signal to re-read the config
1880 my ($pid, $addr, $i);
1881 $miniserv{'inetd'} && return;
1882 $pid = $ENV{'MINISERV_PID'};
1884 open(PID, $miniserv{'pidfile'}) ||
1885 &error("Failed to open PID file $miniserv{'pidfile'}");
1888 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1890 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1892 # Make sure this didn't kill Webmin!
1894 if (!kill(0, $pid)) {
1895 print STDERR "USR1 signal killed Webmin - restarting\n";
1896 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1900 # On Windows, we need to use the flag file
1901 open(TOUCH, ">$miniserv{'reloadflag'}");
1906 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1908 Returns 1 if some module is supported on the current operating system, or the
1909 OS supplies as parameters. The parameters are :
1911 =item minfo - A hash ref of module information, as returned by get_module_info
1913 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1915 =item os-version - The Webmin OS version to use, such as 13.0
1917 =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.
1920 sub check_os_support
1922 my $oss = $_[0]->{'os_support'};
1923 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1924 # May provide usable API
1925 $oss .= " ".$_[0]->{'api_os_support'};
1927 if ($_[0]->{'nozone'} && &running_in_zone()) {
1928 # Not supported in a Solaris Zone
1931 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1932 # Not supported in a Linux Vserver
1935 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1936 # Not supported in an OpenVZ container
1939 return 1 if (!$oss || $oss eq '*');
1940 my $osver = $_[2] || $gconfig{'os_version'};
1941 my $ostype = $_[1] || $gconfig{'os_type'};
1944 my ($os, $ver, $codes);
1945 my ($neg) = ($oss =~ s/^!//); # starts with !
1946 $anyneg++ if ($neg);
1947 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1949 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1951 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1953 $os = $1; $ver = $2; $oss = $3;
1955 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1957 $os = $1; $codes = $2; $oss = $3;
1959 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1961 $codes = $1; $oss = $2;
1963 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1965 $os = $1; $oss = $2;
1968 next if ($os && !($os eq $ostype ||
1969 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1970 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1971 next if ($osver < $1 || $osver > $2);
1973 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1974 next if ($osver < $1);
1976 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1977 next if ($osver > $1);
1980 next if ($ver ne $osver);
1982 next if ($codes && !eval $codes);
1988 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1990 Downloads data from a HTTP url to a local file or string. The parameters are :
1992 =item host - The hostname part of the URL, such as www.google.com
1994 =item port - The HTTP port number, such as 80
1996 =item page - The filename part of the URL, like /index.html
1998 =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.
2000 =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.
2002 =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.
2004 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2006 =item user - If set, HTTP authentication is done with this username.
2008 =item pass - The HTTP password to use with the username above.
2010 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2012 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2014 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2016 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2021 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2022 $timeout, $osdn, $nocache, $headers) = @_;
2023 if ($gconfig{'debug_what_net'}) {
2024 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2025 ($user ? " user=$user pass=$pass" : "").
2026 (ref($dest) ? "" : " dest=$dest"));
2029 # Convert OSDN URL first
2030 my $prot = $ssl ? "https://" : "http://";
2031 my $portstr = $ssl && $port == 443 ||
2032 !$ssl && $port == 80 ? "" : ":$port";
2033 ($host, $port, $page, $ssl) = &parse_http_url(
2034 &convert_osdn_url($prot.$host.$portstr.$page));
2037 # Check if we already have cached the URL
2038 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2039 my $cfile = &check_in_http_cache($url);
2040 if ($cfile && !$nocache) {
2041 # Yes! Copy to dest file or variable
2042 &$cbfunc(6, $url) if ($cbfunc);
2044 &open_readfile(CACHEFILE, $cfile);
2046 $$dest = <CACHEFILE>;
2050 ©_source_dest($cfile, $dest);
2057 push(@headers, [ "Host", $host ]);
2058 push(@headers, [ "User-agent", "Webmin" ]);
2059 push(@headers, [ "Accept-language", "en" ]);
2061 my $auth = &encode_base64("$user:$pass");
2062 $auth =~ tr/\r\n//d;
2063 push(@headers, [ "Authorization", "Basic $auth" ]);
2065 foreach my $hname (keys %$headers) {
2066 push(@headers, [ $hname, $headers->{$hname} ]);
2069 # Actually download it
2070 $main::download_timed_out = undef;
2071 local $SIG{ALRM} = \&download_timeout;
2072 alarm($timeout || 60);
2073 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2075 $h = $main::download_timed_out if ($main::download_timed_out);
2077 if ($error) { $$error = $h; return; }
2078 else { &error($h); }
2080 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2081 $headers, $ssl, $nocache);
2082 if ((!$error || !$$error) && !$nocache) {
2083 &write_to_http_cache($url, $dest);
2087 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2089 Do a HTTP download, after the headers have been sent. For internal use only,
2090 typically called by http_download.
2093 sub complete_http_download
2095 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2101 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2102 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2104 if ($_[2]) { ${$_[2]} = $line; return; }
2105 else { &error("Download failed : $line"); }
2108 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2111 $line = &read_http_connection($_[0]);
2112 $line =~ tr/\r\n//d;
2113 $line =~ /^(\S+):\s+(.*)$/ || last;
2114 $header{lc($1)} = $2;
2115 push(@headers, [ lc($1), $2 ]);
2118 if ($main::download_timed_out) {
2119 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2120 else { &error($main::download_timed_out); }
2122 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2123 if ($rcode >= 300 && $rcode < 400) {
2124 # follow the redirect
2125 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2126 my ($host, $port, $page, $ssl);
2127 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2128 $ssl = $1 eq 'https' ? 1 : 0;
2129 $host = $2; $port = $3; $page = $4 || "/";
2131 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2132 $ssl = $1 eq 'https' ? 1 : 0;
2133 $host = $2; $port = 80; $page = $3 || "/";
2135 elsif ($header{'location'} =~ /^\// && $_[5]) {
2136 # Relative to same server
2140 $page = $header{'location'};
2142 elsif ($header{'location'}) {
2143 # Assume relative to same dir .. not handled
2144 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2145 else { &error("Invalid Location header $header{'location'}"); }
2148 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2149 else { &error("Missing Location header"); }
2152 ($page, $params) = split(/\?/, $page);
2154 $page .= "?".$params if (defined($params));
2155 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2156 undef, undef, undef, $_[4], $_[9], $_[7]);
2161 # Append to a variable
2162 while(defined($buf = &read_http_connection($_[0], 1024))) {
2164 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2170 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2171 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2172 else { &error("Failed to write to $_[1] : $!"); }
2174 binmode(PFILE); # For windows
2175 while(defined($buf = &read_http_connection($_[0], 1024))) {
2176 &print_tempfile(PFILE, $buf);
2177 $got += length($buf);
2178 &$cbfunc(3, $got) if ($cbfunc);
2180 &close_tempfile(PFILE);
2181 if ($header{'content-length'} &&
2182 $got != $header{'content-length'}) {
2183 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2184 else { &error("Download incomplete"); }
2187 &$cbfunc(4) if ($cbfunc);
2189 &close_http_connection($_[0]);
2193 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2195 Download data from an FTP site to a local file. The parameters are :
2197 =item host - FTP server hostname
2199 =item file - File on the FTP server to download
2201 =item destfile - File on the Webmin system to download data to
2203 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2205 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2207 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2209 =item pass - Password for the username above.
2211 =item port - FTP server port number, which defaults to 21 if not set.
2216 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2218 if ($gconfig{'debug_what_net'}) {
2219 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2220 ($user ? " user=$user pass=$pass" : "").
2221 (ref($dest) ? "" : " dest=$dest"));
2225 if (&is_readonly_mode()) {
2226 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2228 else { &error("FTP connections not allowed in readonly mode"); }
2231 # Check if we already have cached the URL
2232 my $url = "ftp://".$host.$file;
2233 my $cfile = &check_in_http_cache($url);
2235 # Yes! Copy to dest file or variable
2236 &$cbfunc(6, $url) if ($cbfunc);
2238 &open_readfile(CACHEFILE, $cfile);
2240 $$dest = <CACHEFILE>;
2244 ©_source_dest($cfile, $dest);
2249 # Actually download it
2250 $main::download_timed_out = undef;
2251 local $SIG{ALRM} = \&download_timeout;
2254 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2255 # download through http-style proxy
2257 if (&open_socket($1, $2, "SOCK", \$error)) {
2259 if ($main::download_timed_out) {
2261 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2262 else { &error($main::download_timed_out); }
2264 my $esc = $_[1]; $esc =~ s/ /%20/g;
2265 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2266 my $portstr = $port == 21 ? "" : ":$port";
2267 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2268 print SOCK "User-agent: Webmin\r\n";
2269 if ($gconfig{'proxy_user'}) {
2270 my $auth = &encode_base64(
2271 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2272 $auth =~ tr/\r\n//d;
2273 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2276 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2279 elsif (!$gconfig{'proxy_fallback'}) {
2281 if ($error) { $$error = $main::download_timed_out; return 0; }
2282 else { &error($main::download_timed_out); }
2287 # connect to host and login with real FTP protocol
2288 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2290 if ($main::download_timed_out) {
2291 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2292 else { &error($main::download_timed_out); }
2294 &ftp_command("", 2, $_[3]) || return 0;
2296 # Login as supplied user
2297 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2299 if (int($urv[1]/100) == 3) {
2300 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2304 # Login as anonymous
2305 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2307 if (int($urv[1]/100) == 3) {
2308 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2312 &$cbfunc(1, 0) if ($cbfunc);
2315 # get the file size and tell the callback
2316 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2317 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2318 defined($size) || return 0;
2320 &$cbfunc(2, int($size));
2324 my $pasv = &ftp_command("PASV", 2, $_[3]);
2325 defined($pasv) || return 0;
2326 $pasv =~ /\(([0-9,]+)\)/;
2327 @n = split(/,/ , $1);
2328 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2329 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2330 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2334 &open_tempfile(PFILE, ">$_[2]", 1);
2335 while(read(CON, $buf, 1024) > 0) {
2336 &print_tempfile(PFILE, $buf);
2337 $got += length($buf);
2338 &$cbfunc(3, $got) if ($cbfunc);
2340 &close_tempfile(PFILE);
2342 if ($got != $size) {
2343 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2344 else { &error("Download incomplete"); }
2346 &$cbfunc(4) if ($cbfunc);
2348 &ftp_command("", 2, $_[3]) || return 0;
2352 &ftp_command("QUIT", 2, $_[3]) || return 0;
2356 &write_to_http_cache($url, $dest);
2360 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2362 Upload data from a local file to an FTP site. The parameters are :
2364 =item host - FTP server hostname
2366 =item file - File on the FTP server to write to
2368 =item srcfile - File on the Webmin system to upload data from
2370 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2372 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2374 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2376 =item pass - Password for the username above.
2378 =item port - FTP server port number, which defaults to 21 if not set.
2385 if (&is_readonly_mode()) {
2386 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2388 else { &error("FTP connections not allowed in readonly mode"); }
2391 $main::download_timed_out = undef;
2392 local $SIG{ALRM} = \&download_timeout;
2395 # connect to host and login
2396 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2398 if ($main::download_timed_out) {
2399 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2400 else { &error($main::download_timed_out); }
2402 &ftp_command("", 2, $_[3]) || return 0;
2404 # Login as supplied user
2405 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2407 if (int($urv[1]/100) == 3) {
2408 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2412 # Login as anonymous
2413 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2415 if (int($urv[1]/100) == 3) {
2416 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2420 &$cbfunc(1, 0) if ($cbfunc);
2422 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2424 # get the file size and tell the callback
2425 my @st = stat($_[2]);
2427 &$cbfunc(2, $st[7]);
2431 my $pasv = &ftp_command("PASV", 2, $_[3]);
2432 defined($pasv) || return 0;
2433 $pasv =~ /\(([0-9,]+)\)/;
2434 @n = split(/,/ , $1);
2435 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2436 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2441 while(read(PFILE, $buf, 1024) > 0) {
2443 $got += length($buf);
2444 &$cbfunc(3, $got) if ($cbfunc);
2448 if ($got != $st[7]) {
2449 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2450 else { &error("Upload incomplete"); }
2452 &$cbfunc(4) if ($cbfunc);
2455 &ftp_command("", 2, $_[3]) || return 0;
2456 &ftp_command("QUIT", 2, $_[3]) || return 0;
2462 =head2 no_proxy(host)
2464 Checks if some host is on the no proxy list. For internal use by the
2465 http_download and ftp_download functions.
2470 my $ip = &to_ipaddress($_[0]);
2471 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2472 return 1 if ($_[0] =~ /\Q$n\E/ ||
2478 =head2 open_socket(host, port, handle, [&error])
2480 Open a TCP connection to some host and port, using a file handle. The
2483 =item host - Hostname or IP address to connect to.
2485 =item port - TCP port number.
2487 =item handle - A file handle name to use for the connection.
2489 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2494 my ($host, $port, $fh, $err) = @_;
2495 $fh = &callers_package($fh);
2497 if ($gconfig{'debug_what_net'}) {
2498 &webmin_debug_log('TCP', "host=$host port=$port");
2500 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2501 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2502 else { &error("Failed to create socket : $!"); }
2505 if (!($addr = inet_aton($host))) {
2506 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2507 else { &error("Failed to lookup IP address for $host"); }
2509 if ($gconfig{'bind_proxy'}) {
2510 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2511 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2512 else { &error("Failed to bind to source address : $!"); }
2515 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2516 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2517 else { &error("Failed to connect to $host:$port : $!"); }
2519 my $old = select($fh); $| =1; select($old);
2523 =head2 download_timeout
2525 Called when a download times out. For internal use only.
2528 sub download_timeout
2530 $main::download_timed_out = "Download timed out";
2533 =head2 ftp_command(command, expected, [&error], [filehandle])
2535 Send an FTP command, and die if the reply is not what was expected. Mainly
2536 for internal use by the ftp_download and ftp_upload functions.
2541 my ($cmd, $expect, $err, $fh) = @_;
2543 $fh = &callers_package($fh);
2546 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2548 print $fh "$cmd\r\n";
2551 if (!($line = <$fh>)) {
2553 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2554 else { &error("Failed to read reply to $what"); }
2556 $line =~ /^(...)(.)(.*)$/;
2559 foreach my $c (@$expect) {
2560 $found++ if (int($1/100) == $c);
2564 $found++ if (int($1/100) == $_[1]);
2568 if ($err) { $$err = "$what failed : $3"; return undef; }
2569 else { &error("$what failed : $3"); }
2574 # Need to skip extra stuff..
2576 if (!($line = <$fh>)) {
2578 if ($$err) { $$err = "Failed to read reply to $what";
2580 else { &error("Failed to read reply to $what"); }
2582 $line =~ /^(....)(.*)$/; $reply .= $2;
2583 if ($1 eq "$rcode ") { last; }
2587 return wantarray ? ($reply, $rcode) : $reply;
2590 =head2 to_ipaddress(hostname)
2592 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2593 it cannot be resolved.
2598 if (&check_ipaddress($_[0])) {
2602 my $hn = gethostbyname($_[0]);
2603 return undef if (!$hn);
2604 local @ip = unpack("CCCC", $hn);
2605 return join("." , @ip);
2609 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2611 Renders a 4-column table of icons. The useful parameters are :
2613 =item links - An array ref of link destination URLs for the icons.
2615 =item titles - An array ref of titles to appear under the icons.
2617 =item icons - An array ref of URLs for icon images.
2619 =item columns - Number of columns to layout the icons with. Defaults to 4.
2624 &load_theme_library();
2625 if (defined(&theme_icons_table)) {
2626 &theme_icons_table(@_);
2630 my $cols = $_[3] ? $_[3] : 4;
2631 my $per = int(100.0 / $cols);
2632 print "<table class='icons_table' width=100% cellpadding=5>\n";
2633 for(my $i=0; $i<@{$_[0]}; $i++) {
2634 if ($i%$cols == 0) { print "<tr>\n"; }
2635 print "<td width=$per% align=center valign=top>\n";
2636 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2637 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2638 $_[7]->[$i], $_[8]->[$i]);
2640 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2642 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2643 print "</tr>\n" if ($need_tr);
2647 =head2 replace_file_line(file, line, [newline]*)
2649 Replaces one line in some file with 0 or more new lines. The parameters are :
2651 =item file - Full path to some file, like /etc/hosts.
2653 =item line - Line number to replace, starting from 0.
2655 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2658 sub replace_file_line
2661 my $realfile = &translate_filename($_[0]);
2662 open(FILE, $realfile);
2665 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2666 else { splice(@lines, $_[1], 1); }
2667 &open_tempfile(FILE, ">$realfile");
2668 &print_tempfile(FILE, @lines);
2669 &close_tempfile(FILE);
2672 =head2 read_file_lines(file, [readonly])
2674 Returns a reference to an array containing the lines from some file. This
2675 array can be modified, and will be written out when flush_file_lines()
2676 is called. The parameters are :
2678 =item file - Full path to the file to read.
2680 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2684 $lref = read_file_lines("/etc/hosts");
2685 push(@$lref, "127.0.0.1 localhost");
2686 flush_file_lines("/etc/hosts");
2692 my ($package, $filename, $line) = caller;
2693 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2695 my $realfile = &translate_filename($_[0]);
2696 if (!$main::file_cache{$realfile}) {
2699 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2700 open(READFILE, $realfile);
2703 $eol = /\r\n$/ ? "\r\n" : "\n";
2709 $main::file_cache{$realfile} = \@lines;
2710 $main::file_cache_noflush{$realfile} = $_[1];
2711 $main::file_cache_eol{$realfile} = $eol || "\n";
2714 # Make read-write if currently readonly
2716 $main::file_cache_noflush{$realfile} = 0;
2719 return $main::file_cache{$realfile};
2722 =head2 flush_file_lines([file], [eol])
2724 Write out to a file previously read by read_file_lines to disk (except
2725 for those marked readonly). The parameters are :
2727 =item file - The file to flush out.
2729 =item eof - End-of-line character for each line. Defaults to \n.
2732 sub flush_file_lines
2736 local $trans = &translate_filename($_[0]);
2737 $main::file_cache{$trans} ||
2738 &error("flush_file_lines called on non-loaded file $trans");
2739 push(@files, $trans);
2742 @files = ( keys %main::file_cache );
2744 foreach my $f (@files) {
2745 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2746 if (!$main::file_cache_noflush{$f}) {
2747 no warnings; # XXX Bareword file handles should go away
2748 &open_tempfile(FLUSHFILE, ">$f");
2749 foreach my $line (@{$main::file_cache{$f}}) {
2750 (print FLUSHFILE $line,$eol) ||
2751 &error(&text("efilewrite", $f, $!));
2753 &close_tempfile(FLUSHFILE);
2755 delete($main::file_cache{$f});
2756 delete($main::file_cache_noflush{$f});
2760 =head2 unflush_file_lines(file)
2762 Clear the internal cache of some given file, previously read by read_file_lines.
2765 sub unflush_file_lines
2767 my $realfile = &translate_filename($_[0]);
2768 delete($main::file_cache{$realfile});
2769 delete($main::file_cache_noflush{$realfile});
2772 =head2 unix_user_input(fieldname, user, [form])
2774 Returns HTML for an input to select a Unix user. By default this is a text
2775 box with a user popup button next to it.
2780 if (defined(&theme_unix_user_input)) {
2781 return &theme_unix_user_input(@_);
2783 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2784 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2787 =head2 unix_group_input(fieldname, user, [form])
2789 Returns HTML for an input to select a Unix group. By default this is a text
2790 box with a group popup button next to it.
2793 sub unix_group_input
2795 if (defined(&theme_unix_group_input)) {
2796 return &theme_unix_group_input(@_);
2798 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2799 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2802 =head2 hlink(text, page, [module], [width], [height])
2804 Returns HTML for a link that when clicked on pops up a window for a Webmin
2805 help page. The parameters are :
2807 =item text - Text for the link.
2809 =item page - Help page code, such as 'intro'.
2811 =item module - Module the help page is in. Defaults to the current module.
2813 =item width - Width of the help popup window. Defaults to 600 pixels.
2815 =item height - Height of the help popup window. Defaults to 400 pixels.
2817 The actual help pages are in each module's help sub-directory, in files with
2823 if (defined(&theme_hlink)) {
2824 return &theme_hlink(@_);
2826 my $mod = $_[2] ? $_[2] : &get_module_name();
2827 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2828 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2829 return "<a onClick='window.open(\"$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>";
2832 =head2 user_chooser_button(field, multiple, [form])
2834 Returns HTML for a javascript button for choosing a Unix user or users.
2835 The parameters are :
2837 =item field - Name of the HTML field to place the username into.
2839 =item multiple - Set to 1 if multiple users can be selected.
2841 =item form - Index of the form on the page.
2844 sub user_chooser_button
2846 return undef if (!&supports_users());
2847 return &theme_user_chooser_button(@_)
2848 if (defined(&theme_user_chooser_button));
2849 my $form = defined($_[2]) ? $_[2] : 0;
2850 my $w = $_[1] ? 500 : 300;
2852 if ($_[1] && $gconfig{'db_sizeusers'}) {
2853 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2855 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2856 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2858 return "<input type=button onClick='ifield = form.$_[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";
2861 =head2 group_chooser_button(field, multiple, [form])
2863 Returns HTML for a javascript button for choosing a Unix group or groups
2864 The parameters are :
2866 =item field - Name of the HTML field to place the group name into.
2868 =item multiple - Set to 1 if multiple groups can be selected.
2870 =item form - Index of the form on the page.
2873 sub group_chooser_button
2875 return undef if (!&supports_users());
2876 return &theme_group_chooser_button(@_)
2877 if (defined(&theme_group_chooser_button));
2878 my $form = defined($_[2]) ? $_[2] : 0;
2879 my $w = $_[1] ? 500 : 300;
2881 if ($_[1] && $gconfig{'db_sizeusers'}) {
2882 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2884 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2885 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2887 return "<input type=button onClick='ifield = form.$_[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";
2890 =head2 foreign_check(module, [api-only])
2892 Checks if some other module exists and is supported on this OS. The parameters
2895 =item module - Name of the module to check.
2897 =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.
2902 my ($mod, $api) = @_;
2904 my $mdir = &module_root_directory($mod);
2905 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2906 return &check_os_support(\%minfo, undef, undef, $api);
2909 =head2 foreign_exists(module)
2911 Checks if some other module exists. The module parameter is the short module
2917 my $mdir = &module_root_directory($_[0]);
2918 return -r "$mdir/module.info";
2921 =head2 foreign_available(module)
2923 Returns 1 if some module is installed, and acessible to the current user. The
2924 module parameter is the module directory name.
2927 sub foreign_available
2929 return 0 if (!&foreign_check($_[0]) &&
2930 !$gconfig{'available_even_if_no_support'});
2931 my %foreign_module_info = &get_module_info($_[0]);
2933 # Check list of allowed modules
2935 &read_acl(\%acl, undef);
2936 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2937 !$acl{$base_remote_user,'*'});
2939 # Check for usermod restrictions
2940 my @usermods = &list_usermods();
2941 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2943 if (&get_product_name() eq "webmin") {
2944 # Check if the user has any RBAC privileges in this module
2945 if (&supports_rbac($_[0]) &&
2946 &use_rbac_module_acl(undef, $_[0])) {
2947 # RBAC is enabled for this user and module - check if he
2949 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2950 return 0 if (!$rbacs);
2952 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2953 # If denying access to modules not specifically allowed by
2954 # RBAC, then prevent access
2959 # Check readonly support
2960 if (&is_readonly_mode()) {
2961 return 0 if (!$foreign_module_info{'readonly'});
2964 # Check if theme vetos
2965 if (defined(&theme_foreign_available)) {
2966 return 0 if (!&theme_foreign_available($_[0]));
2969 # Check if licence module vetos
2970 if ($main::licence_module) {
2971 return 0 if (!&foreign_call($main::licence_module,
2972 "check_module_licence", $_[0]));
2978 =head2 foreign_require(module, [file], [package])
2980 Brings in functions from another module, and places them in the Perl namespace
2981 with the same name as the module. The parameters are :
2983 =item module - The source module's directory name, like sendmail.
2985 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2987 =item package - Perl package to place the module's functions and global variables in.
2989 If the original module name contains dashes, they will be replaced with _ in
2995 my ($mod, $file, $pkg) = @_;
2996 $pkg ||= $mod || "global";
2997 $pkg =~ s/[^A-Za-z0-9]/_/g;
3000 push(@files, $file);
3004 my %minfo = &get_module_info($mod);
3005 if ($minfo{'library'}) {
3006 @files = split(/\s+/, $minfo{'library'});
3009 @files = ( $mod."-lib.pl" );
3012 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3013 return 1 if (!@files);
3014 foreach my $f (@files) {
3015 $main::done_foreign_require{$pkg,$f}++;
3018 my $mdir = &module_root_directory($mod);
3019 @INC = &unique($mdir, @INC);
3020 -d $mdir || &error("Module $mod does not exist");
3021 if (!&get_module_name() && $mod) {
3024 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3025 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3026 my $code = "package $pkg; ".
3027 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3028 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3029 foreach my $f (@files) {
3030 $code .= "do '$mdir/$f' || die \$@; ";
3033 if (defined($old_fmn)) {
3034 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3037 delete($ENV{'FOREIGN_MODULE_NAME'});
3039 if (defined($old_frd)) {
3040 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3043 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3046 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3050 =head2 foreign_call(module, function, [arg]*)
3052 Call a function in another module. The module parameter is the target module
3053 directory name, function is the perl sub to call, and the remaining parameters
3054 are the arguments. However, unless you need to call a function whose name
3055 is dynamic, it is better to use Perl's cross-module function call syntax
3056 like module::function(args).
3061 my $pkg = $_[0] || "global";
3062 $pkg =~ s/[^A-Za-z0-9]/_/g;
3063 my @args = @_[2 .. @_-1];
3064 $main::foreign_args = \@args;
3065 my @rv = eval <<EOF;
3067 &$_[1](\@{\$main::foreign_args});
3069 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3070 return wantarray ? @rv : $rv[0];
3073 =head2 foreign_config(module, [user-config])
3075 Get the configuration from another module, and return it as a hash. If the
3076 user-config parameter is set to 1, returns the Usermin user-level preferences
3077 for the current user instead.
3082 my ($mod, $uc) = @_;
3085 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3086 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3087 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3090 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3095 =head2 foreign_installed(module, mode)
3097 Checks if the server for some module is installed, and possibly also checks
3098 if the module has been configured by Webmin.
3099 For mode 1, returns 2 if the server is installed and configured for use by
3100 Webmin, 1 if installed but not configured, or 0 otherwise.
3101 For mode 0, returns 1 if installed, 0 if not.
3102 If the module does not provide an install_check.pl script, assumes that
3103 the server is installed.
3106 sub foreign_installed
3108 my ($mod, $configured) = @_;
3109 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3111 return $main::foreign_installed_cache{$mod,$configured};
3115 if (!&foreign_check($mod)) {
3120 my $mdir = &module_root_directory($mod);
3121 if (!-r "$mdir/install_check.pl") {
3122 # Not known, assume OK
3123 $rv = $configured ? 2 : 1;
3126 # Call function to check
3127 &foreign_require($mod, "install_check.pl");
3128 $rv = &foreign_call($mod, "is_installed", $configured);
3131 $main::foreign_installed_cache{$mod,$configured} = $rv;
3136 =head2 foreign_defined(module, function)
3138 Returns 1 if some function is defined in another module. In general, it is
3139 simpler to use the syntax &defined(module::function) instead.
3145 $pkg =~ s/[^A-Za-z0-9]/_/g;
3146 my $func = "${pkg}::$_[1]";
3147 return defined(&$func);
3150 =head2 get_system_hostname([short])
3152 Returns the hostname of this system. If the short parameter is set to 1,
3153 then the domain name is not prepended - otherwise, Webmin will attempt to get
3154 the fully qualified hostname, like foo.example.com.
3157 sub get_system_hostname
3160 if (!$main::get_system_hostname[$m]) {
3161 if ($gconfig{'os_type'} ne 'windows') {
3162 # Try some common Linux hostname files first
3164 if ($gconfig{'os_type'} eq 'redhat-linux') {
3166 &read_env_file("/etc/sysconfig/network", \%nc);
3167 if ($nc{'HOSTNAME'}) {
3168 $fromfile = $nc{'HOSTNAME'};
3171 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3172 my $hn = &read_file_contents("/etc/hostname");
3178 elsif ($gconfig{'os_type'} eq 'open-linux') {
3179 my $hn = &read_file_contents("/etc/HOSTNAME");
3185 elsif ($gconfig{'os_type'} eq 'solaris') {
3186 my $hn = &read_file_contents("/etc/nodename");
3193 # If we found a hostname, use it if value
3194 if ($fromfile && ($m || $fromfile =~ /\./)) {
3196 $fromfile =~ s/\..*$//;
3198 $main::get_system_hostname[$m] = $fromfile;
3202 # Can use hostname command on Unix
3203 &execute_command("hostname", undef,
3204 \$main::get_system_hostname[$m], undef, 0, 1);
3205 chop($main::get_system_hostname[$m]);
3207 eval "use Sys::Hostname";
3209 $main::get_system_hostname[$m] = eval "hostname()";
3211 if ($@ || !$main::get_system_hostname[$m]) {
3212 $main::get_system_hostname[$m] = "UNKNOWN";
3215 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3216 $gconfig{'os_type'} =~ /linux$/ &&
3217 !$gconfig{'no_hostname_f'} && !$_[0]) {
3218 # Try with -f flag to get fully qualified name
3220 my $ex = &execute_command("hostname -f", undef, \$flag,
3223 if ($ex || $flag eq "") {
3224 # -f not supported! We have probably set the
3225 # hostname to just '-f'. Fix the problem
3228 &execute_command("hostname ".
3229 quotemeta($main::get_system_hostname[$m]),
3230 undef, undef, undef, 0, 1);
3234 $main::get_system_hostname[$m] = $flag;
3239 # On Windows, try computername environment variable
3240 return $ENV{'computername'} if ($ENV{'computername'});
3241 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3243 # Fall back to net name command
3244 my $out = `net name 2>&1`;
3245 if ($out =~ /\-+\r?\n(\S+)/) {
3246 $main::get_system_hostname[$m] = $1;
3249 $main::get_system_hostname[$m] = "windows";
3253 return $main::get_system_hostname[$m];
3256 =head2 get_webmin_version
3258 Returns the version of Webmin currently being run, such as 1.450.
3261 sub get_webmin_version
3263 if (!$get_webmin_version) {
3264 open(VERSION, "$root_directory/version") || return 0;
3265 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3268 return $get_webmin_version;
3271 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3273 Returns a hash containing access control options for the given user and module.
3274 By default the current username and module name are used. If the no-rbac flag
3275 is given, the permissions will not be updated based on the user's RBAC role
3276 (as seen on Solaris). If the no-default flag is given, default permissions for
3277 the module will not be included.
3282 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3283 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3284 my $mdir = &module_root_directory($m);
3287 # Read default ACL first, to be overridden by per-user settings
3288 &read_file_cached("$mdir/defaultacl", \%rv);
3290 # If this isn't a master admin user, apply the negative permissions
3291 # so that he doesn't un-expectedly gain access to new features
3293 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3294 if ($gaccess{'negative'}) {
3295 &read_file_cached("$mdir/negativeacl", \%rv);
3299 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3300 # RBAC overrides exist for this user in this module
3301 my $rbac = &get_rbac_module_acl(
3302 defined($_[0]) ? $_[0] : $remote_user, $m);
3303 foreach my $r (keys %$rbac) {
3304 $rv{$r} = $rbac->{$r};
3307 elsif ($gconfig{"risk_$u"} && $m) {
3308 # ACL is defined by user's risk level
3309 my $rf = $gconfig{"risk_$u"}.'.risk';
3310 &read_file_cached("$mdir/$rf", \%rv);
3312 my $sf = $gconfig{"skill_$u"}.'.skill';
3313 &read_file_cached("$mdir/$sf", \%rv);
3316 # Use normal Webmin ACL, if a user is set
3317 my $userdb = &get_userdb_string();
3320 # Look for this user in the user/group DB
3321 my ($dbh, $proto) = &connect_userdb($userdb);
3322 ref($dbh) || &error(&text('euserdbacl', $dbh));
3323 if ($proto eq "mysql" || $proto eq "postgresql") {
3324 # Find the user in the SQL DB
3325 my $cmd = $dbh->prepare(
3326 "select id from webmin_user where name = ?");
3327 $cmd && $cmd->execute($u) ||
3328 &error(&text('euserdbacl', $dbh->errstr));
3329 my ($id) = $cmd->fetchrow();
3330 $foundindb = 1 if (defined($id));
3333 # Fetch ACLs with SQL
3335 my $cmd = $dbh->prepare(
3336 "select attr,value from webmin_user_acl ".
3337 "where id = ? and module = ?");
3338 $cmd && $cmd->execute($id, $m) ||
3339 &error(&text('euserdbacl', $dbh->errstr));
3340 while(my ($a, $v) = $cmd->fetchrow()) {
3346 elsif ($proto eq "ldap") {
3347 # Fetch ACLs from LDAP
3350 &disconnect_userdb($userdb, $dbh);
3354 # Read from local files
3355 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3356 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3358 "$config_directory/$m/$remote_user.acl",\%rv);
3362 if ($tconfig{'preload_functions'}) {
3363 &load_theme_library();
3365 if (defined(&theme_get_module_acl)) {
3366 %rv = &theme_get_module_acl($u, $m, \%rv);
3371 =head2 get_group_module_acl(group, [module])
3373 Returns the ACL for a Webmin group, in an optional module (which defaults to
3374 the current module).
3377 sub get_group_module_acl
3380 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3381 my $mdir = &module_root_directory($m);
3383 &read_file_cached("$mdir/defaultacl", \%rv);
3384 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3385 if (defined(&theme_get_module_acl)) {
3386 %rv = &theme_get_module_acl($g, $m, \%rv);
3391 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3393 Updates the acl hash for some user and module. The parameters are :
3395 =item acl - Hash reference for the new access control options, or undef to clear
3397 =item user - User to update, defaulting to the current user.
3399 =item module - Module to update, defaulting to the caller.
3401 =item never-update-group - Never update the user's group's ACL
3406 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3407 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3408 if (!$_[3] && &foreign_check("acl")) {
3409 # Check if this user is a member of a group, and if he gets the
3410 # module from a group. If so, update its ACL as well
3411 &foreign_require("acl", "acl-lib.pl");
3413 foreach my $g (&acl::list_groups()) {
3414 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3415 &indexof($m, @{$g->{'modules'}}) >= 0) {
3421 &save_group_module_acl($_[0], $group->{'name'}, $m);
3425 my $userdb = &get_userdb_string();
3428 # Look for this user in the user/group DB
3429 my ($dbh, $proto) = &connect_userdb($userdb);
3430 ref($dbh) || &error(&text('euserdbacl', $dbh));
3431 if ($proto eq "mysql" || $proto eq "postgresql") {
3432 # Find the user in the SQL DB
3433 my $cmd = $dbh->prepare(
3434 "select id from webmin_user where name = ?");
3435 $cmd && $cmd->execute($u) ||
3436 &error(&text('euserdbacl2', $dbh->errstr));
3437 my ($id) = $cmd->fetchrow();
3438 $foundindb = 1 if (defined($id));
3441 # Replace ACLs for user
3443 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3444 "where id = ? and module = ?");
3445 $cmd && $cmd->execute($id, $m) ||
3446 &error(&text('euserdbacl', $dbh->errstr));
3449 my $cmd = $dbh->prepare(
3450 "insert into webmin_user_acl ".
3451 "(id,module,attr,value) values (?,?,?,?)");
3452 $cmd || &error(&text('euserdbacl2',
3454 foreach my $a (keys %{$_[0]}) {
3455 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3456 &error(&text('euserdbacl2',
3463 elsif ($proto eq "ldap") {
3464 # Update ACLs in LDAP
3467 &disconnect_userdb($userdb, $dbh);
3471 # Save ACL to local file
3472 if (!-d "$config_directory/$m") {
3473 mkdir("$config_directory/$m", 0755);
3476 &write_file("$config_directory/$m/$u.acl", $_[0]);
3479 &unlink_file("$config_directory/$m/$u.acl");
3484 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3486 Updates the acl hash for some group and module. The parameters are :
3488 =item acl - Hash reference for the new access control options.
3490 =item group - Group name to update.
3492 =item module - Module to update, defaulting to the caller.
3494 =item never-update-group - Never update the parent group's ACL
3497 sub save_group_module_acl
3500 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3501 if (!$_[3] && &foreign_check("acl")) {
3502 # Check if this group is a member of a group, and if it gets the
3503 # module from a group. If so, update the parent ACL as well
3504 &foreign_require("acl", "acl-lib.pl");
3506 foreach my $pg (&acl::list_groups()) {
3507 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3508 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3514 &save_group_module_acl($_[0], $group->{'name'}, $m);
3518 my $userdb = &get_userdb_string();
3521 # Look for this group in the user/group DB
3522 my ($dbh, $proto) = &connect_userdb($userdb);
3523 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3524 if ($proto eq "mysql" || $proto eq "postgresql") {
3525 # Find the group in the SQL DB
3526 my $cmd = $dbh->prepare(
3527 "select id from webmin_group where name = ?");
3528 $cmd && $cmd->execute($u) ||
3529 &error(&text('egroupdbacl2', $dbh->errstr));
3530 my ($id) = $cmd->fetchrow();
3531 $foundindb = 1 if (defined($id));
3534 # Replace ACLs for group
3536 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3537 "where id = ? and module = ?");
3538 $cmd && $cmd->execute($id, $m) ||
3539 &error(&text('egroupdbacl', $dbh->errstr));
3542 my $cmd = $dbh->prepare(
3543 "insert into webmin_group_acl ".
3544 "(id,module,attr,value) values (?,?,?,?)");
3545 $cmd || &error(&text('egroupdbacl2',
3547 foreach my $a (keys %{$_[0]}) {
3548 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3549 &error(&text('egroupdbacl2',
3556 elsif ($proto eq "ldap") {
3557 # Update ACLs in LDAP
3560 &disconnect_userdb($userdb, $dbh);
3566 # Save ACL to local file
3567 if (!-d "$config_directory/$m") {
3568 mkdir("$config_directory/$m", 0755);
3571 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3574 &unlink_file("$config_directory/$m/$g.gacl");
3581 This function must be called by all Webmin CGI scripts, either directly or
3582 indirectly via a per-module lib.pl file. It performs a number of initialization
3583 and housekeeping tasks, such as working out the module name, checking that the
3584 current user has access to the module, and populating global variables. Some
3585 of the variables set include :
3587 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3589 =item $var_directory - Base logs directory, typically /var/webmin
3591 =item %config - Per-module configuration.
3593 =item %gconfig - Global configuration.
3595 =item $scriptname - Base name of the current perl script.
3597 =item $module_name - The name of the current module.
3599 =item $module_config_directory - The config directory for this module.
3601 =item $module_config_file - The config file for this module.
3603 =item $module_root_directory - This module's code directory.
3605 =item $webmin_logfile - The detailed logfile for webmin.
3607 =item $remote_user - The actual username used to login to webmin.
3609 =item $base_remote_user - The username whose permissions are in effect.
3611 =item $current_theme - The theme currently in use.
3613 =item $root_directory - The first root directory of this webmin install.
3615 =item @root_directories - All root directories for this webmin install.
3620 # Record first process ID that called this, so we know when it exited to clean
3622 $main::initial_process_id ||= $$;
3624 # Configuration and spool directories
3625 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3626 die "WEBMIN_CONFIG not set";
3628 $config_directory = $ENV{'WEBMIN_CONFIG'};
3629 if (!defined($ENV{'WEBMIN_VAR'})) {
3630 open(VARPATH, "$config_directory/var-path");
3631 chop($var_directory = <VARPATH>);
3635 $var_directory = $ENV{'WEBMIN_VAR'};
3637 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3638 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3640 if ($ENV{'SESSION_ID'}) {
3641 # Hide this variable from called programs, but keep it for internal use
3642 $main::session_id = $ENV{'SESSION_ID'};
3643 delete($ENV{'SESSION_ID'});
3645 if ($ENV{'REMOTE_PASS'}) {
3646 # Hide the password too
3647 $main::remote_pass = $ENV{'REMOTE_PASS'};
3648 delete($ENV{'REMOTE_PASS'});
3651 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3652 # Looks like we are running setuid, but the real UID hasn't been set.
3653 # Do so now, so that executed programs don't get confused
3658 # Read the webmin global config file. This contains the OS type and version,
3659 # OS specific configuration and global options such as proxy servers
3660 $config_file = "$config_directory/config";
3662 &read_file_cached($config_file, \%gconfig);
3663 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3664 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3666 # If debugging is enabled, open the debug log
3667 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3668 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3669 if ($gconfig{'debug_size'}) {
3670 my @st = stat($dlog);
3671 if ($st[7] > $gconfig{'debug_size'}) {
3672 rename($dlog, $dlog.".0");
3675 open(main::DEBUGLOG, ">>$dlog");
3676 $main::opened_debug_log = 1;
3678 if ($gconfig{'debug_what_start'}) {
3679 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3680 $main::debug_log_start_time = time();
3681 &webmin_debug_log("START", "script=$script_name");
3682 $main::debug_log_start_module = $module_name;
3686 # Set PATH and LD_LIBRARY_PATH
3687 if ($gconfig{'path'}) {
3688 if ($gconfig{'syspath'}) {
3690 $ENV{'PATH'} = $gconfig{'path'};
3694 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3697 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3699 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3700 if ($gconfig{'http_proxy'}) {
3701 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3703 if ($gconfig{'ftp_proxy'}) {
3704 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3706 if ($gconfig{'noproxy'}) {
3707 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3710 # Find all root directories
3712 if (&get_miniserv_config(\%miniserv)) {
3713 @root_directories = ( $miniserv{'root'} );
3714 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3715 push(@root_directories, $miniserv{"extraroot_$i"});
3719 # Work out which module we are in, and read the per-module config file
3720 $0 =~ s/\\/\//g; # Force consistent path on Windows
3721 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3722 # In a foreign call - use the module name given
3723 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3724 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3725 @root_directories = ( $root_directory ) if (!@root_directories);
3727 elsif ($ENV{'SCRIPT_NAME'}) {
3728 my $sn = $ENV{'SCRIPT_NAME'};
3729 $sn =~ s/^$gconfig{'webprefix'}//
3730 if (!$gconfig{'webprefixnoredir'});
3731 if ($sn =~ /^\/([^\/]+)\//) {
3732 # Get module name from CGI path
3735 if ($ENV{'SERVER_ROOT'}) {
3736 $root_directory = $ENV{'SERVER_ROOT'};
3738 elsif ($ENV{'SCRIPT_FILENAME'}) {
3739 $root_directory = $ENV{'SCRIPT_FILENAME'};
3740 $root_directory =~ s/$sn$//;
3742 @root_directories = ( $root_directory ) if (!@root_directories);
3745 # Get root directory from miniserv.conf, and deduce module name from $0
3746 $root_directory = $root_directories[0];
3748 foreach my $r (@root_directories) {
3749 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3750 # Under a module directory
3755 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3761 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3764 # Work out of this is a web, command line or cron job
3765 if (!$main::webmin_script_type) {
3766 if ($ENV{'SCRIPT_NAME'}) {
3768 $main::webmin_script_type = 'web';
3771 # Cron jobs have no TTY
3772 if ($gconfig{'os_type'} eq 'windows' ||
3773 open(DEVTTY, ">/dev/tty")) {
3774 $main::webmin_script_type = 'cmd';
3778 $main::webmin_script_type = 'cron';
3783 # Set the umask based on config
3784 if ($gconfig{'umask'} && !$main::umask_already++) {
3785 umask(oct($gconfig{'umask'}));
3788 # If this is a cron job or other background task, set the nice level
3789 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3791 if ($gconfig{'nice'}) {
3792 eval 'POSIX::nice($gconfig{\'nice\'});';
3795 # Set IO scheduling class and priority
3796 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3798 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3799 if ($gconfig{'sclass'} ne '');
3800 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3801 if ($gconfig{'sprio'} ne '');
3803 &execute_command("$cmd >/dev/null 2>&1");
3806 $main::nice_already++;
3809 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3810 $base_remote_user = $u;
3811 $remote_user = $ENV{'REMOTE_USER'};
3814 # Find and load the configuration file for this module
3815 my (@ruinfo, $rgroup);
3816 $module_config_directory = "$config_directory/$module_name";
3817 if (&get_product_name() eq "usermin" &&
3818 -r "$module_config_directory/config.$remote_user") {
3820 $module_config_file = "$module_config_directory/config.$remote_user";
3822 elsif (&get_product_name() eq "usermin" &&
3823 (@ruinfo = getpwnam($remote_user)) &&
3824 ($rgroup = getgrgid($ruinfo[3])) &&
3825 -r "$module_config_directory/config.\@$rgroup") {
3826 # Based on group name
3827 $module_config_file = "$module_config_directory/config.\@$rgroup";
3831 $module_config_file = "$module_config_directory/config";
3834 &read_file_cached($module_config_file, \%config);
3836 # Fix up windows-specific substitutions in values
3837 foreach my $k (keys %config) {
3838 if ($config{$k} =~ /\$\{systemroot\}/) {
3839 my $root = &get_windows_root();
3840 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3845 # Record the initial module
3846 $main::initial_module_name ||= $module_name;
3848 # Set some useful variables
3850 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3851 $gconfig{'mobile_theme'} :
3852 defined($gconfig{'theme_'.$remote_user}) ?
3853 $gconfig{'theme_'.$remote_user} :
3854 defined($gconfig{'theme_'.$base_remote_user}) ?
3855 $gconfig{'theme_'.$base_remote_user} :
3857 @current_themes = split(/\s+/, $current_themes);
3858 $current_theme = $current_themes[0];
3859 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3860 $theme_root_directory = $theme_root_directories[0];
3861 @theme_configs = ( );
3862 foreach my $troot (@theme_root_directories) {
3864 &read_file_cached("$troot/config", \%onetconfig);
3865 &read_file_cached("$troot/config", \%tconfig);
3866 push(@theme_configs, \%onetconfig);
3868 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3869 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3871 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3872 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3874 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3875 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3876 if ($tconfig{'preload_functions'}) {
3877 # Force load of theme functions right now, if requested
3878 &load_theme_library();
3880 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3881 # Load the theme's Webmin:: package classes
3882 do "$theme_root_directory/$tconfig{'oofunctions'}";
3887 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3888 : "$var_directory/webmin.log";
3890 # Load language strings into %text
3891 my @langs = &list_languages();
3893 if ($gconfig{'acceptlang'}) {
3894 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3895 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3897 $accepted_lang = $al->{'lang'};
3902 $current_lang = $force_lang ? $force_lang :
3903 $accepted_lang ? $accepted_lang :
3904 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3905 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3906 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3907 foreach my $l (@langs) {
3908 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3910 @lang_order_list = &unique($default_lang,
3911 split(/:/, $current_lang_info->{'fallback'}),
3913 %text = &load_language($module_name);
3914 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3916 # Get the %module_info for this module
3918 my ($mi) = grep { $_->{'dir'} eq $module_name }
3919 &get_all_module_infos(2);
3920 %module_info = %$mi;
3921 $module_root_directory = &module_root_directory($module_name);
3924 if ($module_name && !$main::no_acl_check &&
3925 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3926 # Check if the HTTP user can access this module
3927 if (!&foreign_available($module_name)) {
3928 if (!&foreign_check($module_name)) {
3929 &error(&text('emodulecheck',
3930 "<i>$module_info{'desc'}</i>"));
3933 &error(&text('emodule', "<i>$u</i>",
3934 "<i>$module_info{'desc'}</i>"));
3937 $main::no_acl_check++;
3940 # Check the Referer: header for nasty redirects
3941 my @referers = split(/\s+/, $gconfig{'referers'});
3943 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3946 my $http_host = $ENV{'HTTP_HOST'};
3947 $http_host =~ s/:\d+$//;
3948 my $unsafe_index = $unsafe_index_cgi ||
3949 &get_module_variable('$unsafe_index_cgi');
3951 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
3952 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3954 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3955 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3956 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3957 ($referer_site && $referer_site ne $http_host &&
3958 &indexof($referer_site, @referers) < 0 ||
3959 !$referer_site && $gconfig{'referers_none'}) &&
3960 !$trust_unknown_referers &&
3961 !&get_module_variable('$trust_unknown_referers')) {
3962 # Looks like a link from elsewhere .. show an error
3963 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3965 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3966 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3967 if ($referer_site) {
3969 print &text('referer_warn',
3970 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3972 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3973 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3976 # No referer info given
3977 print &text('referer_warn_unknown', $url),"<p>\n";
3978 print &text('referer_fix1u'),"<p>\n";
3979 print &text('referer_fix2u'),"<p>\n";
3983 &footer("/", $text{'index'});
3986 $main::no_referers_check++;
3987 $main::completed_referers_check++;
3989 # Call theme post-init
3990 if (defined(&theme_post_init_config)) {
3991 &theme_post_init_config(@_);
3994 # Record that we have done the calling library in this package
3995 my ($callpkg, $lib) = caller();
3997 $main::done_foreign_require{$callpkg,$lib} = 1;
3999 # If a licence checking is enabled, do it now
4000 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4001 &foreign_check($gconfig{'licence_module'}) &&
4002 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4003 my $oldpwd = &get_current_dir();
4004 $main::done_licence_module_check++;
4005 $main::licence_module = $gconfig{'licence_module'};
4006 &foreign_require($main::licence_module, "licence_check.pl");
4007 ($main::licence_status, $main::licence_message) =
4008 &foreign_call($main::licence_module, "check_licence");
4012 # Export global variables to caller
4013 if ($main::export_to_caller) {
4014 foreach my $v ('$config_file', '%gconfig', '$null_file',
4015 '$path_separator', '@root_directories',
4016 '$root_directory', '$module_name',
4017 '$base_remote_user', '$remote_user',
4018 '$module_config_directory', '$module_config_file',
4019 '%config', '@current_themes', '$current_theme',
4020 '@theme_root_directories', '$theme_root_directory',
4021 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4022 '$webmin_logfile', '$current_lang',
4023 '$current_lang_info', '@lang_order_list', '%text',
4024 '%module_info', '$module_root_directory') {
4025 my ($vt, $vn) = split('', $v, 2);
4026 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4033 =head2 load_language([module], [directory])
4035 Returns a hashtable mapping text codes to strings in the appropriate language,
4036 based on the $current_lang global variable, which is in turn set based on
4037 the Webmin user's selection. The optional module parameter tells the function
4038 which module to load strings for, and defaults to the calling module. The
4039 optional directory parameter can be used to load strings from a directory
4042 In regular module development you will never need to call this function
4043 directly, as init_config calls it for you, and places the module's strings
4044 into the %text hash.
4050 my $root = $root_directory;
4051 my $ol = $gconfig{'overlang'};
4052 my ($dir) = ($_[1] || "lang");
4054 # Read global lang files
4055 foreach my $o (@lang_order_list) {
4056 my $ok = &read_file_cached("$root/$dir/$o", \%text);
4057 return () if (!$ok && $o eq $default_lang);
4060 foreach my $o (@lang_order_list) {
4061 &read_file_cached("$root/$ol/$o", \%text);
4064 &read_file_cached("$config_directory/custom-lang", \%text);
4067 # Read module's lang files
4068 my $mdir = &module_root_directory($_[0]);
4069 foreach my $o (@lang_order_list) {
4070 &read_file_cached("$mdir/$dir/$o", \%text);
4073 foreach $o (@lang_order_list) {
4074 &read_file_cached("$mdir/$ol/$o", \%text);
4077 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4079 foreach $k (keys %text) {
4080 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4083 if (defined(&theme_load_language)) {
4084 &theme_load_language(\%text, $_[0]);
4089 =head2 text_subs(string)
4091 Used internally by load_language to expand $code substitutions in language
4097 if (substr($_[0], 0, 8) eq "include:") {
4100 open(INCLUDE, substr($_[0], 8));
4108 my $t = $_[1]->{$_[0]};
4109 return defined($t) ? $t : '$'.$_[0];
4113 =head2 text(message, [substitute]+)
4115 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4116 the substitute parameters. This makes it easy to use strings with placeholders
4117 that get replaced with programmatically generated text. For example :
4119 print &text('index_hello', $remote_user),"<p>\n";
4124 my $t = &get_module_variable('%text', 1);
4125 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4126 for(my $i=1; $i<@_; $i++) {
4127 $rv =~ s/\$$i/$_[$i]/g;
4132 =head2 encode_base64(string)
4134 Encodes a string into base64 format, for use in MIME email or HTTP
4135 authorization headers.
4141 pos($_[0]) = 0; # ensure start at the beginning
4142 while ($_[0] =~ /(.{1,57})/gs) {
4143 $res .= substr(pack('u57', $1), 1)."\n";
4146 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4147 my $padding = (3 - length($_[0]) % 3) % 3;
4148 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4152 =head2 decode_base64(string)
4154 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4161 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4162 if (length($str) % 4) {
4165 $str =~ s/=+$//; # remove padding
4166 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4167 while ($str =~ /(.{1,60})/gs) {
4168 my $len = chr(32 + length($1)*3/4); # compute length byte
4169 $res .= unpack("u", $len . $1 ); # uudecode
4174 =head2 get_module_info(module, [noclone], [forcache])
4176 Returns a hash containg details of the given module. Some useful keys are :
4178 =item dir - The module directory, like sendmail.
4180 =item desc - Human-readable description, in the current users' language.
4182 =item version - Optional module version number.
4184 =item os_support - List of supported operating systems and versions.
4186 =item category - Category on Webmin's left menu, like net.
4191 return () if ($_[0] =~ /^\./);
4192 my (%rv, $clone, $o);
4193 my $mdir = &module_root_directory($_[0]);
4194 &read_file_cached("$mdir/module.info", \%rv) || return ();
4196 foreach $o (@lang_order_list) {
4197 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4198 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4200 if ($clone && !$_[1] && $config_directory) {
4201 $rv{'clone'} = $rv{'desc'};
4202 &read_file("$config_directory/$_[0]/clone", \%rv);
4205 my %module_categories;
4206 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4207 my $pn = &get_product_name();
4208 if (defined($rv{'category_'.$pn})) {
4209 # Can override category for webmin/usermin
4210 $rv{'category'} = $rv{'category_'.$pn};
4212 $rv{'realcategory'} = $rv{'category'};
4213 $rv{'category'} = $module_categories{$_[0]}
4214 if (defined($module_categories{$_[0]}));
4216 # Apply description overrides
4217 $rv{'realdesc'} = $rv{'desc'};
4219 &read_file_cached("$config_directory/webmin.descs", \%descs);
4220 if ($descs{$_[0]." ".$current_lang}) {
4221 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4223 elsif ($descs{$_[0]}) {
4224 $rv{'desc'} = $descs{$_[0]};
4228 # Apply per-user description overridde
4229 my %gaccess = &get_module_acl(undef, "");
4230 if ($gaccess{'desc_'.$_[0]}) {
4231 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4235 if ($rv{'longdesc'}) {
4236 # All standard modules have an index.cgi
4237 $rv{'index_link'} = 'index.cgi';
4240 # Call theme-specific override function
4241 if (defined(&theme_get_module_info)) {
4242 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4248 =head2 get_all_module_infos(cachemode)
4250 Returns a list contains the information on all modules in this webmin
4251 install, including clones. Uses caching to reduce the number of module.info
4252 files that need to be read. Each element of the array is a hash reference
4253 in the same format as returned by get_module_info. The cache mode flag can be :
4254 0 = read and write, 1 = don't read or write, 2 = read only
4257 sub get_all_module_infos
4261 # Is the cache out of date? (ie. have any of the root's changed?)
4262 my $cache_file = "$config_directory/module.infos.cache";
4264 if (&read_file_cached($cache_file, \%cache)) {
4265 foreach my $r (@root_directories) {
4267 if ($st[9] != $cache{'mtime_'.$r}) {
4277 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4278 # Can use existing module.info cache
4280 foreach my $k (keys %cache) {
4281 if ($k =~ /^(\S+) (\S+)$/) {
4282 $mods{$1}->{$2} = $cache{$k};
4285 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4288 # Need to rebuild cache
4290 foreach my $r (@root_directories) {
4292 foreach my $m (readdir(DIR)) {
4293 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4294 my %minfo = &get_module_info($m, 0, 1);
4295 next if (!%minfo || !$minfo{'dir'});
4297 foreach $k (keys %minfo) {
4298 $cache{"${m} ${k}"} = $minfo{$k};
4303 $cache{'mtime_'.$r} = $st[9];
4305 $cache{'lang'} = $current_lang;
4306 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4309 # Override descriptions for modules for current user
4310 my %gaccess = &get_module_acl(undef, "");
4311 foreach my $m (@rv) {
4312 if ($gaccess{"desc_".$m->{'dir'}}) {
4313 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4317 # Apply installed flags
4319 &read_file_cached("$config_directory/installed.cache", \%installed);
4320 foreach my $m (@rv) {
4321 $m->{'installed'} = $installed{$m->{'dir'}};
4327 =head2 get_theme_info(theme)
4329 Returns a hash containing a theme's details, taken from it's theme.info file.
4330 Some useful keys are :
4332 =item dir - The theme directory, like blue-theme.
4334 =item desc - Human-readable description, in the current users' language.
4336 =item version - Optional module version number.
4338 =item os_support - List of supported operating systems and versions.
4343 return () if ($_[0] =~ /^\./);
4345 my $tdir = &module_root_directory($_[0]);
4346 &read_file("$tdir/theme.info", \%rv) || return ();
4347 foreach my $o (@lang_order_list) {
4348 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4354 =head2 list_languages
4356 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4357 Each is a hash reference with the following keys :
4359 =item lang - The short language code, like es for Spanish.
4361 =item desc - A human-readable description, in English.
4363 =item charset - An optional character set to use when displaying the language.
4365 =item titles - Set to 1 only if Webmin has title images for the language.
4367 =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.
4372 if (!@main::list_languages_cache) {
4375 open(LANG, "$root_directory/lang_list.txt");
4377 if (/^(\S+)\s+(.*)/) {
4378 my $l = { 'desc' => $2 };
4379 foreach $o (split(/,/, $1)) {
4380 if ($o =~ /^([^=]+)=(.*)$/) {
4384 $l->{'index'} = scalar(@rv);
4385 push(@main::list_languages_cache, $l);
4389 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4390 @main::list_languages_cache;
4392 return @main::list_languages_cache;
4395 =head2 read_env_file(file, &hash)
4397 Similar to Webmin's read_file function, but handles files containing shell
4398 environment variables formatted like :
4403 The file parameter is the full path to the file to read, and hash a Perl hash
4404 ref to read names and values into.
4410 &open_readfile(FILE, $_[0]) || return 0;
4413 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4414 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4415 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4423 =head2 write_env_file(file, &hash, [export])
4425 Writes out a hash to a file in name='value' format, suitable for use in a shell
4426 script. The parameters are :
4428 =item file - Full path for a file to write to
4430 =item hash - Hash reference of names and values to write.
4432 =item export - If set to 1, preceed each variable setting with the word 'export'.
4437 my $exp = $_[2] ? "export " : "";
4438 &open_tempfile(FILE, ">$_[0]");
4439 foreach my $k (keys %{$_[1]}) {
4440 my $v = $_[1]->{$k};
4441 if ($v =~ /^\S+$/) {
4442 &print_tempfile(FILE, "$exp$k=$v\n");
4445 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4448 &close_tempfile(FILE);
4451 =head2 lock_file(filename, [readonly], [forcefile])
4453 Lock a file for exclusive access. If the file is already locked, spin
4454 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4455 to work OK. The parameters are :
4457 =item filename - File or directory to lock.
4459 =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.
4461 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4466 my $realfile = &translate_filename($_[0]);
4467 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4468 my $no_lock = !&can_lock_file($realfile);
4469 my $lock_tries_count = 0;
4472 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4477 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4480 # Create the .lock file
4481 open(LOCKING, ">$realfile.lock") || return 0;
4482 my $lck = eval "flock(LOCKING, 2+4)";
4484 # Lock of lock file failed! Wait till later
4487 print LOCKING $$,"\n";
4488 eval "flock(LOCKING, 8)";
4491 $main::locked_file_list{$realfile} = int($_[1]);
4492 push(@main::temporary_files, "$realfile.lock");
4493 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4494 !&get_module_variable('$no_log_file_changes') &&
4496 # Grab a copy of this file for later diffing
4498 $main::locked_file_data{$realfile} = undef;
4500 $main::locked_file_type{$realfile} = 1;
4501 $main::locked_file_data{$realfile} = '';
4503 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4504 $main::locked_file_type{$realfile} = 2;
4505 $main::locked_file_data{$realfile} = $lnk;
4507 elsif (open(ORIGFILE, $realfile)) {
4508 $main::locked_file_type{$realfile} = 0;
4509 $main::locked_file_data{$realfile} = '';
4512 $main::locked_file_data{$realfile} .=$_;
4521 if ($lock_tries_count++ > 5*60) {
4522 # Give up after 5 minutes
4523 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4529 =head2 unlock_file(filename)
4531 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4532 file changes is enabled, then at unlock file a diff will be taken between the
4533 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4534 called. This can then be viewed in the Webmin Actions Log module.
4539 my $realfile = &translate_filename($_[0]);
4540 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4541 unlink("$realfile.lock") if (&can_lock_file($realfile));
4542 delete($main::locked_file_list{$realfile});
4543 if (exists($main::locked_file_data{$realfile})) {
4544 # Diff the new file with the old
4546 my $lnk = readlink($realfile);
4547 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4548 my $oldtype = $main::locked_file_type{$realfile};
4549 my $new = !defined($main::locked_file_data{$realfile});
4550 if ($new && !-e _) {
4551 # file doesn't exist, and never did! do nothing ..
4553 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4554 # is (or was) a directory ..
4555 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4556 push(@main::locked_file_diff,
4557 { 'type' => 'mkdir', 'object' => $realfile });
4559 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4560 push(@main::locked_file_diff,
4561 { 'type' => 'rmdir', 'object' => $realfile });
4564 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4565 # is (or was) a symlink ..
4566 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4567 push(@main::locked_file_diff,
4568 { 'type' => 'symlink', 'object' => $realfile,
4571 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4572 push(@main::locked_file_diff,
4573 { 'type' => 'unsymlink', 'object' => $realfile,
4574 'data' => $main::locked_file_data{$realfile} });
4576 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4577 push(@main::locked_file_diff,
4578 { 'type' => 'resymlink', 'object' => $realfile,
4583 # is a file, or has changed type?!
4584 my ($diff, $delete_file);
4585 my $type = "modify";
4587 open(NEWFILE, ">$realfile");
4592 if (!defined($main::locked_file_data{$realfile})) {
4595 open(ORIGFILE, ">$realfile.webminorig");
4596 print ORIGFILE $main::locked_file_data{$realfile};
4598 $diff = &backquote_command(
4599 "diff ".quotemeta("$realfile.webminorig")." ".
4600 quotemeta($realfile)." 2>/dev/null");
4601 push(@main::locked_file_diff,
4602 { 'type' => $type, 'object' => $realfile,
4603 'data' => $diff } ) if ($diff);
4604 unlink("$realfile.webminorig");
4605 unlink($realfile) if ($delete_file);
4608 if ($gconfig{'logfullfiles'}) {
4609 # Add file details to list of those to fully log
4610 $main::orig_file_data{$realfile} ||=
4611 $main::locked_file_data{$realfile};
4612 $main::orig_file_type{$realfile} ||=
4613 $main::locked_file_type{$realfile};
4616 delete($main::locked_file_data{$realfile});
4617 delete($main::locked_file_type{$realfile});
4621 =head2 test_lock(file)
4623 Returns 1 if some file is currently locked, 0 if not.
4628 my $realfile = &translate_filename($_[0]);
4629 return 0 if (!$_[0]);
4630 return 1 if (defined($main::locked_file_list{$realfile}));
4631 return 0 if (!&can_lock_file($realfile));
4633 if (open(LOCKING, "$realfile.lock")) {
4638 return $pid && kill(0, $pid);
4641 =head2 unlock_all_files
4643 Unlocks all files locked by the current script.
4646 sub unlock_all_files
4648 foreach $f (keys %main::locked_file_list) {
4653 =head2 can_lock_file(file)
4655 Returns 1 if some file should be locked, based on the settings in the
4656 Webmin Configuration module. For internal use by lock_file only.
4661 if (&is_readonly_mode()) {
4662 return 0; # never lock in read-only mode
4664 elsif ($gconfig{'lockmode'} == 0) {
4667 elsif ($gconfig{'lockmode'} == 1) {
4671 # Check if under any of the directories
4673 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4674 if (&same_file($d, $_[0]) ||
4675 &is_under_directory($d, $_[0])) {
4679 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4683 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4685 Log some action taken by a user. This is typically called at the end of a
4686 script, once all file changes are complete and all commands run. The
4689 =item action - A short code for the action being performed, like 'create'.
4691 =item type - A code for the type of object the action is performed to, like 'user'.
4693 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4695 =item params - A hash ref of additional information about the action.
4697 =item module - Name of the module in which the action was performed, which defaults to the current module.
4699 =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.
4701 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4703 =item client-ip - IP address of the browser that performed the action.
4708 return if (!$gconfig{'log'} || &is_readonly_mode());
4709 my $m = $_[4] ? $_[4] : &get_module_name();
4711 if ($gconfig{'logclear'}) {
4712 # check if it is time to clear the log
4713 my @st = stat("$webmin_logfile.time");
4714 my $write_logtime = 0;
4716 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4717 # clear logfile and all diff files
4718 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4719 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4720 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4721 unlink($webmin_logfile);
4728 if ($write_logtime) {
4729 open(LOGTIME, ">$webmin_logfile.time");
4730 print LOGTIME time(),"\n";
4735 # If an action script directory is defined, call the appropriate scripts
4736 if ($gconfig{'action_script_dir'}) {
4737 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4738 my ($basedir) = $gconfig{'action_script_dir'};
4740 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4743 opendir(DIR, $dir) or die "Can't open $dir: $!";
4744 while (defined($file = readdir(DIR))) {
4745 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4746 if (-x "$dir/$file") {
4747 # Call a script notifying it of the action
4749 $ENV{'ACTION_MODULE'} = &get_module_name();
4750 $ENV{'ACTION_ACTION'} = $_[0];
4751 $ENV{'ACTION_TYPE'} = $_[1];
4752 $ENV{'ACTION_OBJECT'} = $_[2];
4753 $ENV{'ACTION_SCRIPT'} = $script_name;
4754 foreach my $p (keys %param) {
4755 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4757 system("$dir/$file", @_,
4758 "<$null_file", ">$null_file", "2>&1");
4766 # should logging be done at all?
4767 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4768 split(/\s+/, $gconfig{'logusers'})) < 0);
4769 return if ($gconfig{'logmodules'} && &indexof($m,
4770 split(/\s+/, $gconfig{'logmodules'})) < 0);
4774 my @tm = localtime($now);
4775 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4776 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4777 $main::action_id_count++;
4778 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4779 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4780 $tm[2], $tm[1], $tm[0],
4781 $remote_user || '-',
4782 $main::session_id || '-',
4783 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4784 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4785 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4787 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4788 my $v = $_[3]->{$k};
4794 elsif (ref($v) eq 'ARRAY') {
4798 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4799 $line .= " $k='$vv'";
4803 foreach $vv (split(/\0/, $v)) {
4805 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4806 $line .= " $k='$vv'";
4809 $param{$k} = join(" ", @pv);
4811 open(WEBMINLOG, ">>$webmin_logfile");
4812 print WEBMINLOG $line,"\n";
4814 if ($gconfig{'logperms'}) {
4815 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4818 chmod(0600, $webmin_logfile);
4821 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4822 # Find and record the changes made to any locked files, or commands run
4824 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4825 foreach my $d (@main::locked_file_diff) {
4826 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4827 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4828 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4829 print DIFFLOG $d->{'data'};
4831 if ($d->{'input'}) {
4832 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4833 print DIFFLOG $d->{'input'};
4836 if ($gconfig{'logperms'}) {
4837 chmod(oct($gconfig{'logperms'}),
4838 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4839 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4843 @main::locked_file_diff = undef;
4845 if ($gconfig{'logfullfiles'}) {
4846 # Save the original contents of any modified files
4848 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4849 foreach my $f (keys %main::orig_file_data) {
4850 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4851 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4852 if (!defined($main::orig_file_type{$f})) {
4853 print ORIGLOG -1," ",$f,"\n";
4856 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4858 print ORIGLOG $main::orig_file_data{$f};
4860 if ($gconfig{'logperms'}) {
4861 chmod(oct($gconfig{'logperms'}),
4862 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4866 %main::orig_file_data = undef;
4867 %main::orig_file_type = undef;
4871 if ($gconfig{'logsyslog'}) {
4872 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4873 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4874 setlogsock("inet");';
4876 # Syslog module is installed .. try to convert to a
4877 # human-readable form
4879 my $mod = &get_module_name();
4880 my $mdir = module_root_directory($mod);
4881 if (-r "$mdir/log_parser.pl") {
4882 &foreign_require($mod, "log_parser.pl");
4884 foreach my $k (keys %{$_[3]}) {
4885 my $v = $_[3]->{$k};
4886 if (ref($v) eq 'ARRAY') {
4887 $params{$k} = join("\0", @$v);
4893 $msg = &foreign_call($mod, "parse_webmin_log",
4894 $remote_user, $script_name,
4895 $_[0], $_[1], $_[2], \%params);
4896 $msg =~ s/<[^>]*>//g; # Remove tags
4898 elsif ($_[0] eq "_config_") {
4899 my %wtext = &load_language("webminlog");
4900 $msg = $wtext{'search_config'};
4902 $msg ||= "$_[0] $_[1] $_[2]";
4903 my %info = &get_module_info($m);
4904 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4909 =head2 additional_log(type, object, data, [input])
4911 Records additional log data for an upcoming call to webmin_log, such
4912 as a command that was run or SQL that was executed. Typically you will never
4913 need to call this function directory.
4918 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4919 push(@main::locked_file_diff,
4920 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4921 'input' => $_[3] } );
4925 =head2 webmin_debug_log(type, message)
4927 Write something to the Webmin debug log. For internal use only.
4930 sub webmin_debug_log
4932 my ($type, $msg) = @_;
4933 return 0 if (!$main::opened_debug_log);
4934 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4935 if ($gconfig{'debug_modules'}) {
4936 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
4937 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
4940 my @tm = localtime($now);
4942 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4943 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4944 $tm[2], $tm[1], $tm[0],
4945 $remote_user || "-",
4946 $ENV{'REMOTE_HOST'} || "-",
4947 &get_module_name() || "-",
4950 seek(main::DEBUGLOG, 0, 2);
4951 print main::DEBUGLOG $line."\n";
4955 =head2 system_logged(command)
4957 Just calls the Perl system() function, but also logs the command run.
4962 if (&is_readonly_mode()) {
4963 print STDERR "Vetoing command $_[0]\n";
4966 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4967 my $cmd = join(" ", @realcmd);
4969 if ($cmd =~ s/(\s*&\s*)$//) {
4972 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4973 $cmd =~ s/^\((.*)\)\s*$/$1/;
4975 &additional_log('exec', undef, $cmd);
4976 return system(@realcmd);
4979 =head2 backquote_logged(command)
4981 Executes a command and returns the output (like `command`), but also logs it.
4984 sub backquote_logged
4986 if (&is_readonly_mode()) {
4988 print STDERR "Vetoing command $_[0]\n";
4991 my $realcmd = &translate_command($_[0]);
4994 if ($cmd =~ s/(\s*&\s*)$//) {
4997 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4998 $cmd =~ s/^\((.*)\)\s*$/$1/;
5000 &additional_log('exec', undef, $cmd);
5001 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5005 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5007 Runs some command, waiting at most the given number of seconds for it to
5008 complete, and returns the output. The maxlines parameter sets the number
5009 of lines of output to capture. The safe parameter should be set to 1 if the
5010 command is safe for read-only mode users to run.
5013 sub backquote_with_timeout
5015 my $realcmd = &translate_command($_[0]);
5016 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5017 if ($gconfig{'debug_what_cmd'});
5019 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5024 my $elapsed = time() - $start;
5025 last if ($elapsed > $_[1]);
5027 vec($rmask, fileno(OUT), 1) = 1;
5028 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5029 last if (!$sel || $sel < 0);
5031 last if (!defined($line));
5034 if ($_[3] && $linecount >= $_[3]) {
5039 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5043 return wantarray ? ($out, $timed_out) : $out;
5046 =head2 backquote_command(command, safe?)
5048 Executes a command and returns the output (like `command`), subject to
5049 command translation. The safe parameter should be set to 1 if the command
5050 is safe for read-only mode users to run.
5053 sub backquote_command
5055 if (&is_readonly_mode() && !$_[1]) {
5056 print STDERR "Vetoing command $_[0]\n";
5060 my $realcmd = &translate_command($_[0]);
5061 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5065 =head2 kill_logged(signal, pid, ...)
5067 Like Perl's built-in kill function, but also logs the fact that some process
5068 was killed. On Windows, falls back to calling process.exe to terminate a
5074 return scalar(@_)-1 if (&is_readonly_mode());
5075 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5076 if ($gconfig{'debug_what_procs'});
5077 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5078 if ($gconfig{'os_type'} eq 'windows') {
5079 # Emulate some kills with process.exe
5080 my $arg = $_[0] eq "KILL" ? "-k" :
5081 $_[0] eq "TERM" ? "-q" :
5082 $_[0] eq "STOP" ? "-s" :
5083 $_[0] eq "CONT" ? "-r" : undef;
5085 foreach my $p (@_[1..@_-1]) {
5087 $ok ||= kill($_[0], $p);
5090 &execute_command("process $arg $p");
5102 =head2 rename_logged(old, new)
5104 Re-names a file and logs the rename. If the old and new files are on different
5105 filesystems, calls mv or the Windows rename function to do the job.
5110 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5111 return &rename_file($_[0], $_[1]);
5114 =head2 rename_file(old, new)
5116 Renames a file or directory. If the old and new files are on different
5117 filesystems, calls mv or the Windows rename function to do the job.
5122 if (&is_readonly_mode()) {
5123 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5126 my $src = &translate_filename($_[0]);
5127 my $dst = &translate_filename($_[1]);
5128 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5129 if ($gconfig{'debug_what_ops'});
5130 my $ok = rename($src, $dst);
5131 if (!$ok && $! !~ /permission/i) {
5132 # Try the mv command, in case this is a cross-filesystem rename
5133 if ($gconfig{'os_type'} eq 'windows') {
5134 # Need to use rename
5135 my $out = &backquote_command("rename ".quotemeta($_[0]).
5136 " ".quotemeta($_[1])." 2>&1");
5138 $! = $out if (!$ok);
5142 my $out = &backquote_command("mv ".quotemeta($_[0]).
5143 " ".quotemeta($_[1])." 2>&1");
5145 $! = $out if (!$ok);
5151 =head2 symlink_logged(src, dest)
5153 Create a symlink, and logs it. Effectively does the same thing as the Perl
5160 my $rv = &symlink_file($_[0], $_[1]);
5161 &unlock_file($_[1]);
5165 =head2 symlink_file(src, dest)
5167 Creates a soft link, unless in read-only mode. Effectively does the same thing
5168 as the Perl symlink function.
5173 if (&is_readonly_mode()) {
5174 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5177 my $src = &translate_filename($_[0]);
5178 my $dst = &translate_filename($_[1]);
5179 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5180 if ($gconfig{'debug_what_ops'});
5181 return symlink($src, $dst);
5184 =head2 link_file(src, dest)
5186 Creates a hard link, unless in read-only mode. The existing new link file
5187 will be deleted if necessary. Effectively the same as Perl's link function.
5192 if (&is_readonly_mode()) {
5193 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5196 my $src = &translate_filename($_[0]);
5197 my $dst = &translate_filename($_[1]);
5198 &webmin_debug_log('LINK', "src=$src dst=$dst")
5199 if ($gconfig{'debug_what_ops'});
5200 unlink($dst); # make sure link works
5201 return link($src, $dst);
5204 =head2 make_dir(dir, perms, recursive)
5206 Creates a directory and sets permissions on it, unless in read-only mode.
5207 The perms parameter sets the octal permissions to apply, which unlike Perl's
5208 mkdir will really get set. The recursive flag can be set to 1 to have the
5209 function create parent directories too.
5214 my ($dir, $perms, $recur) = @_;
5215 if (&is_readonly_mode()) {
5216 print STDERR "Vetoing directory $dir\n";
5219 $dir = &translate_filename($dir);
5220 my $exists = -d $dir ? 1 : 0;
5221 return 1 if ($exists && $recur); # already exists
5222 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5223 my $rv = mkdir($dir, $perms);
5224 if (!$rv && $recur) {
5225 # Failed .. try mkdir -p
5226 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5227 my $ex = &execute_command("mkdir $param "."e_path($dir));
5233 chmod($perms, $dir);
5238 =head2 set_ownership_permissions(user, group, perms, file, ...)
5240 Sets the user, group owner and permissions on some files. The parameters are :
5242 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5244 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5246 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5248 =item file - One or more files or directories to modify.
5251 sub set_ownership_permissions
5253 my ($user, $group, $perms, @files) = @_;
5254 if (&is_readonly_mode()) {
5255 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5258 @files = map { &translate_filename($_) } @files;
5259 if ($gconfig{'debug_what_ops'}) {
5260 foreach my $f (@files) {
5261 &webmin_debug_log('PERMS',
5262 "file=$f user=$user group=$group perms=$perms");
5266 if (defined($user)) {
5267 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5269 if (defined($group)) {
5270 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5273 my @uinfo = getpwuid($uid);
5276 $rv = chown($uid, $gid, @files);
5278 if ($rv && defined($perms)) {
5279 $rv = chmod($perms, @files);
5284 =head2 unlink_logged(file, ...)
5286 Like Perl's unlink function, but locks the files beforehand and un-locks them
5287 after so that the deletion is logged by Webmin.
5293 foreach my $f (@_) {
5294 if (!&test_lock($f)) {
5299 my @rv = &unlink_file(@_);
5300 foreach my $f (@_) {
5305 return wantarray ? @rv : $rv[0];
5308 =head2 unlink_file(file, ...)
5310 Deletes some files or directories. Like Perl's unlink function, but also
5311 recursively deletes directories with the rm command if needed.
5316 return 1 if (&is_readonly_mode());
5319 foreach my $f (@_) {
5320 &unflush_file_lines($f);
5321 my $realf = &translate_filename($f);
5322 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5324 if (!rmdir($realf)) {
5326 if ($gconfig{'os_type'} eq 'windows') {
5327 # Call del and rmdir commands
5330 my $out = `del /q "$qm" 2>&1`;
5332 $out = `rmdir "$qm" 2>&1`;
5337 my $qm = quotemeta($realf);
5338 $out = `rm -rf $qm 2>&1`;
5347 if (!unlink($realf)) {
5353 return wantarray ? ($rv, $err) : $rv;
5356 =head2 copy_source_dest(source, dest)
5358 Copy some file or directory to a new location. Returns 1 on success, or 0
5359 on failure - also sets $! on failure. If the source is a directory, uses
5360 piped tar commands to copy a whole directory structure including permissions
5364 sub copy_source_dest
5366 return (1, undef) if (&is_readonly_mode());
5367 my ($src, $dst) = @_;
5370 &webmin_debug_log('COPY', "src=$src dst=$dst")
5371 if ($gconfig{'debug_what_ops'});
5372 if ($gconfig{'os_type'} eq 'windows') {
5373 # No tar or cp on windows, so need to use copy command
5377 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5380 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5388 # A directory .. need to copy with tar command
5389 my @st = stat($src);
5392 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5393 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5400 # Can just copy with cp
5401 my $out = &backquote_logged("cp -p ".quotemeta($src).
5402 " ".quotemeta($dst)." 2>&1");
5408 return wantarray ? ($ok, $err) : $ok;
5411 =head2 remote_session_name(host|&server)
5413 Generates a session ID for some server. For this server, this will always
5414 be an empty string. For a server object it will include the hostname and
5415 port and PID. For a server name, it will include the hostname and PID. For
5419 sub remote_session_name
5421 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5422 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5423 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5424 ref($_[0]) ? "" : "$_[0].$$";
5427 =head2 remote_foreign_require(server, module, file)
5429 Connects to rpc.cgi on a remote webmin server and have it open a session
5430 to a process that will actually do the require and run functions. This is the
5431 equivalent for foreign_require, but for a remote Webmin system. The server
5432 parameter can either be a hostname of a system registered in the Webmin
5433 Servers Index module, or a hash reference for a system from that module.
5436 sub remote_foreign_require
5438 my $call = { 'action' => 'require',
5441 my $sn = &remote_session_name($_[0]);
5442 if ($remote_session{$sn}) {
5443 $call->{'session'} = $remote_session{$sn};
5446 $call->{'newsession'} = 1;
5448 my $rv = &remote_rpc_call($_[0], $call);
5449 if ($rv->{'session'}) {
5450 $remote_session{$sn} = $rv->{'session'};
5451 $remote_session_server{$sn} = $_[0];
5455 =head2 remote_foreign_call(server, module, function, [arg]*)
5457 Call a function on a remote server. Must have been setup first with
5458 remote_foreign_require for the same server and module. Equivalent to
5459 foreign_call, but with the extra server parameter to specify the remote
5463 sub remote_foreign_call
5465 return undef if (&is_readonly_mode());
5466 my $sn = &remote_session_name($_[0]);
5467 return &remote_rpc_call($_[0], { 'action' => 'call',
5470 'session' => $remote_session{$sn},
5471 'args' => [ @_[3 .. $#_] ] } );
5474 =head2 remote_foreign_check(server, module, [api-only])
5476 Checks if some module is installed and supported on a remote server. Equivilant
5477 to foreign_check, but for the remote Webmin system specified by the server
5481 sub remote_foreign_check
5483 return &remote_rpc_call($_[0], { 'action' => 'check',
5488 =head2 remote_foreign_config(server, module)
5490 Gets the configuration for some module from a remote server, as a hash.
5491 Equivalent to foreign_config, but for a remote system.
5494 sub remote_foreign_config
5496 return &remote_rpc_call($_[0], { 'action' => 'config',
5497 'module' => $_[1] });
5500 =head2 remote_eval(server, module, code)
5502 Evaluates some perl code in the context of a module on a remote webmin server.
5503 The server parameter must be the hostname of a remote system, module must
5504 be a module directory name, and code a string of Perl code to run. This can
5505 only be called after remote_foreign_require for the same server and module.
5510 return undef if (&is_readonly_mode());
5511 my $sn = &remote_session_name($_[0]);
5512 return &remote_rpc_call($_[0], { 'action' => 'eval',
5515 'session' => $remote_session{$sn} });
5518 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5520 Transfers some local file to another server via Webmin's RPC protocol, and
5521 returns the resulting remote filename. If the remotefile parameter is given,
5522 that is the destination filename which will be used. Otherwise a randomly
5523 selected temporary filename will be used, and returned by the function.
5528 return undef if (&is_readonly_mode());
5530 my $sn = &remote_session_name($_[0]);
5531 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5532 # Copy data over TCP connection
5533 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5535 'name' => $_[3] } );
5537 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5538 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5539 return &$main::remote_error_handler("Failed to transfer file : $error")
5542 while(read(FILE, $got, 1024) > 0) {
5546 shutdown(TWRITE, 1);
5548 if ($error && $error !~ /^OK/) {
5549 # Got back an error!
5550 return &$main::remote_error_handler("Failed to transfer file : $error");
5556 # Just pass file contents as parameters
5558 while(read(FILE, $got, 1024) > 0) {
5562 return &remote_rpc_call($_[0], { 'action' => 'write',
5565 'session' => $remote_session{$sn} });
5569 =head2 remote_read(server, localfile, remotefile)
5571 Transfers a file from a remote server to this system, using Webmin's RPC
5572 protocol. The server parameter must be the hostname of a system registered
5573 in the Webmin Servers Index module, localfile is the destination path on this
5574 system, and remotefile is the file to fetch from the remote server.
5579 my $sn = &remote_session_name($_[0]);
5580 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5581 # Copy data over TCP connection
5582 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5583 'file' => $_[2] } );
5585 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5588 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5589 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5590 return &$main::remote_error_handler("Failed to transfer file : $error")
5593 open(FILE, ">$_[1]");
5594 while(read(TREAD, $got, 1024) > 0) {
5601 # Just get data as return value
5602 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5604 'session' => $remote_session{$sn} });
5605 open(FILE, ">$_[1]");
5611 =head2 remote_finished
5613 Close all remote sessions. This happens automatically after a while
5614 anyway, but this function should be called to clean things up faster.
5619 foreach my $sn (keys %remote_session) {
5620 my $server = $remote_session_server{$sn};
5621 &remote_rpc_call($server, { 'action' => 'quit',
5622 'session' => $remote_session{$sn} } );
5623 delete($remote_session{$sn});
5624 delete($remote_session_server{$sn});
5626 foreach $fh (keys %fast_fh_cache) {
5628 delete($fast_fh_cache{$fh});
5632 =head2 remote_error_setup(&function)
5634 Sets a function to be called instead of &error when a remote RPC operation
5635 fails. Useful if you want to have more control over your remote operations.
5638 sub remote_error_setup
5640 $main::remote_error_handler = $_[0] || \&error;
5643 =head2 remote_rpc_call(server, structure)
5645 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5646 and then reads back a reply structure. This is mainly for internal use only,
5647 and is called by the other remote_* functions.
5653 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5655 # Server structure was given
5657 $serv->{'user'} || $serv->{'id'} == 0 ||
5658 return &$main::remote_error_handler(
5659 "No Webmin login set for server");
5662 # lookup the server in the webmin servers module if needed
5663 if (!%main::remote_servers_cache) {
5664 &foreign_require("servers", "servers-lib.pl");
5665 foreach $s (&foreign_call("servers", "list_servers")) {
5666 $main::remote_servers_cache{$s->{'host'}} = $s;
5667 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5670 $serv = $main::remote_servers_cache{$_[0]};
5671 $serv || return &$main::remote_error_handler(
5672 "No Webmin Servers entry for $_[0]");
5673 $serv->{'user'} || return &$main::remote_error_handler(
5674 "No login set for server $_[0]");
5676 my $ip = $serv->{'ip'} || $serv->{'host'};
5678 # Work out the username and password
5680 if ($serv->{'sameuser'}) {
5681 $user = $remote_user;
5682 defined($main::remote_pass) || return &$main::remote_error_handler(
5683 "Password for this server is not available");
5684 $pass = $main::remote_pass;
5687 $user = $serv->{'user'};
5688 $pass = $serv->{'pass'};
5691 if ($serv->{'fast'} || !$sn) {
5692 # Make TCP connection call to fastrpc.cgi
5693 if (!$fast_fh_cache{$sn} && $sn) {
5694 # Need to open the connection
5695 my $con = &make_http_connection(
5696 $ip, $serv->{'port'}, $serv->{'ssl'},
5697 "POST", "/fastrpc.cgi");
5698 return &$main::remote_error_handler(
5699 "Failed to connect to $serv->{'host'} : $con")
5701 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5702 &write_http_connection($con, "User-agent: Webmin\r\n");
5703 my $auth = &encode_base64("$user:$pass");
5705 &write_http_connection($con, "Authorization: basic $auth\r\n");
5706 &write_http_connection($con, "Content-length: ",
5707 length($tostr),"\r\n");
5708 &write_http_connection($con, "\r\n");
5709 &write_http_connection($con, $tostr);
5711 # read back the response
5712 my $line = &read_http_connection($con);
5713 $line =~ tr/\r\n//d;
5714 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5715 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5717 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5718 return &$main::remote_error_handler("HTTP error : $line");
5720 $line = &read_http_connection($con);
5721 $line =~ tr/\r\n//d;
5723 $line = &read_http_connection($con);
5724 if ($line =~ /^0\s+(.*)/) {
5725 return &$main::remote_error_handler("RPC error : $1");
5727 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5728 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5729 # Started ok .. connect and save SID
5730 &close_http_connection($con);
5731 my ($port, $sid, $version, $error) = ($1, $2, $3);
5732 &open_socket($ip, $port, $sid, \$error);
5733 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5735 $fast_fh_cache{$sn} = $sid;
5736 $remote_server_version{$sn} = $version;
5739 while($stuff = &read_http_connection($con)) {
5742 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5745 elsif (!$fast_fh_cache{$sn}) {
5746 # Open the connection by running fastrpc.cgi locally
5747 pipe(RPCOUTr, RPCOUTw);
5751 open(STDOUT, ">&RPCOUTw");
5755 $ENV{'REQUEST_METHOD'} = 'GET';
5756 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5757 $ENV{'SERVER_ROOT'} ||= $root_directory;
5759 if ($base_remote_user ne 'root' &&
5760 $base_remote_user ne 'admin') {
5761 # Need to fake up a login for the CGI!
5762 &read_acl(undef, \%acl);
5763 $ENV{'BASE_REMOTE_USER'} =
5764 $ENV{'REMOTE_USER'} =
5765 $acl{'root'} ? 'root' : 'admin';
5767 delete($ENV{'FOREIGN_MODULE_NAME'});
5768 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5769 chdir($root_directory);
5770 if (!exec("$root_directory/fastrpc.cgi")) {
5771 print "exec failed : $!\n";
5778 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5782 if ($line =~ /^0\s+(.*)/) {
5783 return &$main::remote_error_handler("RPC error : $2");
5785 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5786 # Started ok .. connect and save SID
5788 my ($port, $sid, $error) = ($1, $2, undef);
5789 &open_socket("localhost", $port, $sid, \$error);
5790 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5791 $fast_fh_cache{$sn} = $sid;
5798 &error("Bad response from fastrpc.cgi : $line");
5801 # Got a connection .. send off the request
5802 my $fh = $fast_fh_cache{$sn};
5803 my $tostr = &serialise_variable($_[1]);
5804 print $fh length($tostr)," $fh\n";
5806 my $rlen = int(<$fh>);
5807 my ($fromstr, $got);
5808 while(length($fromstr) < $rlen) {
5809 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5810 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5813 my $from = &unserialise_variable($fromstr);
5815 return &$main::remote_error_handler("Remote Webmin error");
5817 if (defined($from->{'arv'})) {
5818 return @{$from->{'arv'}};
5821 return $from->{'rv'};
5825 # Call rpc.cgi on remote server
5826 my $tostr = &serialise_variable($_[1]);
5828 my $con = &make_http_connection($ip, $serv->{'port'},
5829 $serv->{'ssl'}, "POST", "/rpc.cgi");
5830 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5832 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5833 &write_http_connection($con, "User-agent: Webmin\r\n");
5834 my $auth = &encode_base64("$user:$pass");
5836 &write_http_connection($con, "Authorization: basic $auth\r\n");
5837 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5838 &write_http_connection($con, "\r\n");
5839 &write_http_connection($con, $tostr);
5841 # read back the response
5842 my $line = &read_http_connection($con);
5843 $line =~ tr/\r\n//d;
5844 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5845 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5847 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5849 $line = &read_http_connection($con);
5850 $line =~ tr/\r\n//d;
5853 while($line = &read_http_connection($con)) {
5857 my $from = &unserialise_variable($fromstr);
5858 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5859 if (defined($from->{'arv'})) {
5860 return @{$from->{'arv'}};
5863 return $from->{'rv'};
5868 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5870 Executes some function in parallel on multiple servers at once. Fills in
5871 the returns and errors arrays respectively. If the module and library
5872 parameters are given, that module is remotely required on the server first,
5873 to check if it is connectable. The parameters are :
5875 =item servers - A list of Webmin system hash references.
5877 =item parallel - Number of parallel operations to perform.
5879 =item function - Reference to function to call for each system.
5881 =item args - Additional parameters to the function.
5883 =item returns - Array ref to place return values into, in same order as servers.
5885 =item errors - Array ref to place error messages into.
5887 =item module - Optional module to require on the remote system first.
5889 =item library - Optional library to require in the module.
5892 sub remote_multi_callback
5894 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5895 &remote_error_setup(\&remote_multi_callback_error);
5897 # Call the functions
5899 foreach my $g (@$servs) {
5905 $remote_multi_callback_err = undef;
5907 # Require the remote lib
5908 &remote_foreign_require($g->{'host'}, $mod, $lib);
5909 if ($remote_multi_callback_err) {
5910 # Failed .. return error
5911 print $wh &serialise_variable(
5912 [ undef, $remote_multi_callback_err ]);
5918 my $a = ref($args) ? $args->[$p] : $args;
5919 my $rv = &$func($g, $a);
5922 print $wh &serialise_variable(
5923 [ $rv, $remote_multi_callback_err ]);
5931 # Read back the results
5933 foreach my $g (@$servs) {
5937 $errs->[$p] = "Failed to read response from $g->{'host'}";
5940 my $rv = &unserialise_variable($line);
5942 $rets->[$p] = $rv->[0];
5943 $errs->[$p] = $rv->[1];
5948 &remote_error_setup(undef);
5951 sub remote_multi_callback_error
5953 $remote_multi_callback_err = $_[0];
5956 =head2 serialise_variable(variable)
5958 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5959 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5960 called on each member to serialize the entire object.
5963 sub serialise_variable
5965 if (!defined($_[0])) {
5971 $rv = &urlize($_[0]);
5973 elsif ($r eq 'SCALAR') {
5974 $rv = &urlize(${$_[0]});
5976 elsif ($r eq 'ARRAY') {
5977 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5979 elsif ($r eq 'HASH') {
5980 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5981 &urlize(&serialise_variable($_[0]->{$_})) }
5984 elsif ($r eq 'REF') {
5985 $rv = &serialise_variable(${$_[0]});
5987 elsif ($r eq 'CODE') {
5992 # An object - treat as a hash
5993 $r = "OBJECT ".&urlize($r);
5994 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5995 &urlize(&serialise_variable($_[0]->{$_})) }
5998 return ($r ? $r : 'VAL').",".$rv;
6001 =head2 unserialise_variable(string)
6003 Converts a string created by serialise_variable() back into the original
6004 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6005 object, the same class is used on this system, if available.
6008 sub unserialise_variable
6010 my @v = split(/,/, $_[0]);
6012 if ($v[0] eq 'VAL') {
6013 @v = split(/,/, $_[0], -1);
6014 $rv = &un_urlize($v[1]);
6016 elsif ($v[0] eq 'SCALAR') {
6017 local $r = &un_urlize($v[1]);
6020 elsif ($v[0] eq 'ARRAY') {
6022 for(my $i=1; $i<@v; $i++) {
6023 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6026 elsif ($v[0] eq 'HASH') {
6028 for(my $i=1; $i<@v; $i+=2) {
6029 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6030 &unserialise_variable(&un_urlize($v[$i+1]));
6033 elsif ($v[0] eq 'REF') {
6034 local $r = &unserialise_variable($v[1]);
6037 elsif ($v[0] eq 'UNDEF') {
6040 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6041 # An object hash that we have to re-bless
6044 for(my $i=1; $i<@v; $i+=2) {
6045 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6046 &unserialise_variable(&un_urlize($v[$i+1]));
6054 =head2 other_groups(user)
6056 Returns a list of secondary groups a user is a member of, as a list of
6065 while(my @g = getgrent()) {
6066 my @m = split(/\s+/, $g[3]);
6067 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6069 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6073 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6075 Returns HTML for a button that pops up a data chooser window. The parameters
6078 =item dayfield - Name of the text field to place the day of the month into.
6080 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6082 =item yearfield - Name of the text field to place the year into.
6085 sub date_chooser_button
6087 return &theme_date_chooser_button(@_)
6088 if (defined(&theme_date_chooser_button));
6089 my ($w, $h) = (250, 225);
6090 if ($gconfig{'db_sizedate'}) {
6091 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6093 return "<input type=button onClick='window.dfield = form.$_[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";
6096 =head2 help_file(module, file)
6098 Returns the path to a module's help file of some name, typically under the
6099 help directory with a .html extension.
6104 my $mdir = &module_root_directory($_[0]);
6105 my $dir = "$mdir/help";
6106 foreach my $o (@lang_order_list) {
6107 my $lang = "$dir/$_[1].$o.html";
6108 return $lang if (-r $lang);
6110 return "$dir/$_[1].html";
6115 Seeds the random number generator, if not already done in this script. On Linux
6116 this makes use of the current time, process ID and a read from /dev/urandom.
6117 On other systems, only the current time and process ID are used.
6122 if (!$main::done_seed_random) {
6123 if (open(RANDOM, "/dev/urandom")) {
6125 read(RANDOM, $buf, 4);
6127 srand(time() ^ $$ ^ $buf);
6132 $main::done_seed_random = 1;
6136 =head2 disk_usage_kb(directory)
6138 Returns the number of kB used by some directory and all subdirs. Implemented
6139 by calling the C<du -k> command.
6144 my $dir = &translate_filename($_[0]);
6146 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6148 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6150 return $out =~ /^([0-9]+)/ ? $1 : "???";
6153 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6155 Returns the number of bytes taken up by all files in some directory and all
6156 sub-directories, by summing up their lengths. The disk_usage_kb is more
6157 reflective of reality, as the filesystem typically pads file sizes to 1k or
6161 sub recursive_disk_usage
6163 my $dir = &translate_filename($_[0]);
6170 my @st = stat($dir);
6176 my @files = readdir(DIR);
6178 foreach my $f (@files) {
6179 next if ($f eq "." || $f eq "..");
6180 next if ($skip && $f =~ /$skip/);
6181 next if ($only && $f !~ /$only/);
6182 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6188 =head2 help_search_link(term, [ section, ... ] )
6190 Returns HTML for a link to the man module for searching local and online
6191 docs for various search terms. The term parameter can either be a single
6192 word like 'bind', or a space-separated list of words. This function is typically
6193 used by modules that want to refer users to additional documentation in man
6194 pages or local system doc files.
6197 sub help_search_link
6199 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6200 my $for = &urlize(shift(@_));
6201 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6202 join("&", map { "section=$_" } @_)."&".
6203 "for=$for&exact=1&check=".&get_module_name()."'>".
6204 $text{'helpsearch'}."</a>\n";
6211 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6213 Opens a connection to some HTTP server, maybe through a proxy, and returns
6214 a handle object. The handle can then be used to send additional headers
6215 and read back a response. If anything goes wrong, returns an error string.
6216 The parameters are :
6218 =item host - Hostname or IP address of the webserver to connect to.
6220 =item port - HTTP port number to connect to.
6222 =item ssl - Set to 1 to connect in SSL mode.
6224 =item method - HTTP method, like GET or POST.
6226 =item page - Page to request on the webserver, like /foo/index.html
6228 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6231 sub make_http_connection
6233 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6236 foreach my $h (@$headers) {
6237 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6241 if (&is_readonly_mode()) {
6242 return "HTTP connections not allowed in readonly mode";
6244 my $rv = { 'fh' => time().$$ };
6247 eval "use Net::SSLeay";
6248 $@ && return $text{'link_essl'};
6249 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6250 eval "Net::SSLeay::load_error_strings()";
6251 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6252 return "Failed to create SSL context";
6253 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6254 return "Failed to create SSL connection";
6256 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6257 !&no_proxy($host)) {
6260 &open_socket($1, $2, $rv->{'fh'}, \$error);
6263 my $fh = $rv->{'fh'};
6264 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6265 if ($gconfig{'proxy_user'}) {
6266 my $auth = &encode_base64(
6267 "$gconfig{'proxy_user'}:".
6268 "$gconfig{'proxy_pass'}");
6269 $auth =~ tr/\r\n//d;
6270 print $fh "Proxy-Authorization: Basic $auth\r\n";
6274 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6275 return "Proxy error : $3" if ($2 != 200);
6278 return "Proxy error : $line";
6283 elsif (!$gconfig{'proxy_fallback'}) {
6284 # Connection to proxy failed - give up
6291 &open_socket($host, $port, $rv->{'fh'}, \$error);
6292 return $error if ($error);
6294 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6295 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6296 return "SSL connect() failed";
6297 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6298 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6301 # Plain HTTP request
6303 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6304 !&no_proxy($host)) {
6307 &open_socket($1, $2, $rv->{'fh'}, \$error);
6311 my $fh = $rv->{'fh'};
6312 my $rtxt = $method." ".
6313 "http://$host:$port$page HTTP/1.0\r\n";
6314 if ($gconfig{'proxy_user'}) {
6315 my $auth = &encode_base64(
6316 "$gconfig{'proxy_user'}:".
6317 "$gconfig{'proxy_pass'}");
6318 $auth =~ tr/\r\n//d;
6319 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6324 elsif (!$gconfig{'proxy_fallback'}) {
6329 # Connecting directly
6331 &open_socket($host, $port, $rv->{'fh'}, \$error);
6332 return $error if ($error);
6333 my $fh = $rv->{'fh'};
6334 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6341 =head2 read_http_connection(&handle, [bytes])
6343 Reads either one line or up to the specified number of bytes from the handle,
6344 originally supplied by make_http_connection.
6347 sub read_http_connection
6351 if ($h->{'ssl_con'}) {
6354 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6355 # need to read more..
6356 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6358 $rv = $h->{'buffer'};
6359 delete($h->{'buffer'});
6362 $h->{'buffer'} .= $more;
6364 $rv = substr($h->{'buffer'}, 0, $idx+1);
6365 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6368 if (length($h->{'buffer'})) {
6369 $rv = $h->{'buffer'};
6370 delete($h->{'buffer'});
6373 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6379 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6382 my $fh = $h->{'fh'};
6386 $rv = undef if ($rv eq "");
6390 =head2 write_http_connection(&handle, [data+])
6392 Writes the given data to the given HTTP connection handle.
6395 sub write_http_connection
6398 my $fh = $h->{'fh'};
6400 if ($h->{'ssl_ctx'}) {
6401 foreach my $s (@_) {
6402 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6403 $allok = 0 if (!$ok);
6407 my $ok = (print $fh @_);
6408 $allok = 0 if (!$ok);
6413 =head2 close_http_connection(&handle)
6415 Closes a connection to an HTTP server, identified by the given handle.
6418 sub close_http_connection
6424 =head2 clean_environment
6426 Deletes any environment variables inherited from miniserv so that they
6427 won't be passed to programs started by webmin. This is useful when calling
6428 programs that check for CGI-related environment variables and modify their
6429 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6432 sub clean_environment
6434 %UNCLEAN_ENV = %ENV;
6435 foreach my $k (keys %ENV) {
6436 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6440 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6441 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6442 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6443 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6444 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6445 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6446 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6447 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6453 =head2 reset_environment
6455 Puts the environment back how it was before clean_environment was callled.
6458 sub reset_environment
6461 foreach my $k (keys %UNCLEAN_ENV) {
6462 $ENV{$k} = $UNCLEAN_ENV{$k};
6464 undef(%UNCLEAN_ENV);
6468 =head2 progress_callback
6470 Never called directly, but useful for passing to &http_download to print
6471 out progress of an HTTP request.
6474 sub progress_callback
6476 if (defined(&theme_progress_callback)) {
6477 # Call the theme override
6478 return &theme_progress_callback(@_);
6482 print $progress_callback_prefix;
6484 $progress_size = $_[1];
6485 $progress_step = int($_[1] / 10);
6486 print &text('progress_size2', $progress_callback_url,
6487 &nice_size($progress_size)),"<br>\n";
6490 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6492 $last_progress_time = $last_progress_size = undef;
6494 elsif ($_[0] == 3) {
6496 my $sp = $progress_callback_prefix.(" " x 5);
6497 if ($progress_size) {
6498 # And we have a size to compare against
6499 my $st = int(($_[1] * 10) / $progress_size);
6500 my $time_now = time();
6501 if ($st != $progress_step ||
6502 $time_now - $last_progress_time > 60) {
6503 # Show progress every 10% or 60 seconds
6504 print $sp,&text('progress_datan', &nice_size($_[1]),
6505 int($_[1]*100/$progress_size)),"<br>\n";
6506 $last_progress_time = $time_now;
6508 $progress_step = $st;
6511 # No total size .. so only show in 100k jumps
6512 if ($_[1] > $last_progress_size+100*1024) {
6513 print $sp,&text('progress_data2n',
6514 &nice_size($_[1])),"<br>\n";
6515 $last_progress_size = $_[1];
6519 elsif ($_[0] == 4) {
6520 # All done downloading
6521 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6523 elsif ($_[0] == 5) {
6524 # Got new location after redirect
6525 $progress_callback_url = $_[1];
6527 elsif ($_[0] == 6) {
6529 $progress_callback_url = $_[1];
6530 print &text('progress_incache', $progress_callback_url),"<br>\n";
6534 =head2 switch_to_remote_user
6536 Changes the user and group of the current process to that of the unix user
6537 with the same name as the current webmin login, or fails if there is none.
6538 This should be called by Usermin module scripts that only need to run with
6539 limited permissions.
6542 sub switch_to_remote_user
6544 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6546 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6547 &create_missing_homedir(\@remote_user_info);
6549 &switch_to_unix_user(\@remote_user_info);
6550 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6551 $ENV{'HOME'} = $remote_user_info[7];
6553 # Export global variables to caller
6554 if ($main::export_to_caller) {
6555 my ($callpkg) = caller();
6556 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6560 =head2 switch_to_unix_user(&user-details)
6562 Switches the current process to the UID and group ID from the given list
6563 of user details, which must be in the format returned by getpwnam.
6566 sub switch_to_unix_user
6569 if (!defined($uinfo->[0])) {
6570 # No username given, so just use given GID
6571 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6574 # Use all groups from user
6575 ($(, $)) = ( $uinfo->[3],
6576 "$uinfo->[3] ".join(" ", $uinfo->[3],
6577 &other_groups($uinfo->[0])) );
6580 POSIX::setuid($uinfo->[2]);
6582 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6583 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6587 =head2 eval_as_unix_user(username, &code)
6589 Runs some code fragment with the effective UID and GID switch to that
6590 of the given Unix user, so that file IO takes place with his permissions.
6594 sub eval_as_unix_user
6596 my ($user, $code) = @_;
6597 my @uinfo = getpwnam($user);
6598 if (!scalar(@uinfo)) {
6599 &error("eval_as_unix_user called with invalid user $user");
6601 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6605 local $main::error_must_die = 1;
6612 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6615 return wantarray ? @rv : $rv[0];
6618 =head2 create_user_config_dirs
6620 Creates per-user config directories and sets $user_config_directory and
6621 $user_module_config_directory to them. Also reads per-user module configs
6622 into %userconfig. This should be called by Usermin module scripts that need
6623 to store per-user preferences or other settings.
6626 sub create_user_config_dirs
6628 return if (!$gconfig{'userconfig'});
6629 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6630 return if (!@uinfo || !$uinfo[7]);
6631 &create_missing_homedir(\@uinfo);
6632 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6633 if (!-d $user_config_directory) {
6634 mkdir($user_config_directory, 0700) ||
6635 &error("Failed to create $user_config_directory : $!");
6636 if ($< == 0 && $uinfo[2]) {
6637 chown($uinfo[2], $uinfo[3], $user_config_directory);
6640 if (&get_module_name()) {
6641 $user_module_config_directory = $user_config_directory."/".
6643 if (!-d $user_module_config_directory) {
6644 mkdir($user_module_config_directory, 0700) ||
6645 &error("Failed to create $user_module_config_directory : $!");
6646 if ($< == 0 && $uinfo[2]) {
6647 chown($uinfo[2], $uinfo[3], $user_config_directory);
6651 &read_file_cached("$module_root_directory/defaultuconfig",
6653 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6654 &read_file_cached("$user_module_config_directory/config",
6658 # Export global variables to caller
6659 if ($main::export_to_caller) {
6660 my ($callpkg) = caller();
6661 foreach my $v ('$user_config_directory',
6662 '$user_module_config_directory', '%userconfig') {
6663 my ($vt, $vn) = split('', $v, 2);
6664 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6669 =head2 create_missing_homedir(&uinfo)
6671 If auto homedir creation is enabled, create one for this user if needed.
6672 For internal use only.
6675 sub create_missing_homedir
6678 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6679 # Use has no home dir .. make one
6680 system("mkdir -p ".quotemeta($uinfo->[7]));
6681 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6682 if ($gconfig{'create_homedir_perms'} ne '') {
6683 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6688 =head2 filter_javascript(text)
6690 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6691 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6694 sub filter_javascript
6697 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6698 $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;
6699 $rv =~ s/(javascript:)/x$1/gi;
6700 $rv =~ s/(vbscript:)/x$1/gi;
6704 =head2 resolve_links(path)
6706 Given a path that may contain symbolic links, returns the real path.
6712 $path =~ s/\/+/\//g;
6713 $path =~ s/\/$// if ($path ne "/");
6714 my @p = split(/\/+/, $path);
6716 for(my $i=0; $i<@p; $i++) {
6717 my $sofar = "/".join("/", @p[0..$i]);
6718 my $lnk = readlink($sofar);
6719 if ($lnk eq $sofar) {
6720 # Link to itself! Cannot do anything more really ..
6723 elsif ($lnk =~ /^\//) {
6724 # Link is absolute..
6725 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6729 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6735 =head2 simplify_path(path, bogus)
6737 Given a path, maybe containing elements ".." and "." , convert it to a
6738 clean, absolute form. Returns undef if this is not possible.
6746 my @bits = split(/\/+/, $dir);
6749 foreach my $b (@bits) {
6753 elsif ($b eq "..") {
6755 if (scalar(@fixedbits) == 0) {
6756 # Cannot! Already at root!
6763 push(@fixedbits, $b);
6766 return "/".join('/', @fixedbits);
6769 =head2 same_file(file1, file2)
6771 Returns 1 if two files are actually the same
6776 return 1 if ($_[0] eq $_[1]);
6777 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6778 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6779 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6780 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6781 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6782 return 0 if (!@stat1 || !@stat2);
6783 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6786 =head2 flush_webmin_caches
6788 Clears all in-memory and on-disk caches used by Webmin.
6791 sub flush_webmin_caches
6793 undef(%main::read_file_cache);
6794 undef(%main::acl_hash_cache);
6795 undef(%main::acl_array_cache);
6796 undef(%main::has_command_cache);
6797 undef(@main::list_languages_cache);
6798 undef($main::got_list_usermods_cache);
6799 undef(@main::list_usermods_cache);
6800 undef(%main::foreign_installed_cache);
6801 unlink("$config_directory/module.infos.cache");
6802 &get_all_module_infos();
6805 =head2 list_usermods
6807 Returns a list of additional module restrictions. For internal use in
6813 if (!$main::got_list_usermods_cache) {
6814 @main::list_usermods_cache = ( );
6816 open(USERMODS, "$config_directory/usermin.mods");
6818 if (/^([^:]+):(\+|-|):(.*)/) {
6819 push(@main::list_usermods_cache,
6820 [ $1, $2, [ split(/\s+/, $3) ] ]);
6824 $main::got_list_usermods_cache = 1;
6826 return @main::list_usermods_cache;
6829 =head2 available_usermods(&allmods, &usermods)
6831 Returns a list of modules that are available to the given user, based
6832 on usermod additional/subtractions. For internal use by Usermin only.
6835 sub available_usermods
6837 return @{$_[0]} if (!@{$_[1]});
6839 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6840 my @uinfo = @remote_user_info;
6841 @uinfo = getpwnam($remote_user) if (!@uinfo);
6842 foreach my $u (@{$_[1]}) {
6844 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6847 elsif ($u->[0] =~ /^\@(.*)$/) {
6848 # Check for group membership
6849 my @ginfo = getgrnam($1);
6850 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6851 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6853 elsif ($u->[0] =~ /^\//) {
6854 # Check users and groups in file
6856 open(USERFILE, $u->[0]);
6859 if ($_ eq $remote_user) {
6862 elsif (/^\@(.*)$/) {
6863 my @ginfo = getgrnam($1);
6865 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6866 &indexof($remote_user,
6867 split(/\s+/, $ginfo[3])) >= 0));
6874 if ($u->[1] eq "+") {
6875 map { $mods{$_}++ } @{$u->[2]};
6877 elsif ($u->[1] eq "-") {
6878 map { delete($mods{$_}) } @{$u->[2]};
6882 map { $mods{$_}++ } @{$u->[2]};
6886 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6889 =head2 get_available_module_infos(nocache)
6891 Returns a list of modules available to the current user, based on
6892 operating system support, access control and usermod restrictions. Useful
6893 in themes that need to display a list of modules the user can use.
6894 Each element of the returned array is a hash reference in the same format as
6895 returned by get_module_info.
6898 sub get_available_module_infos
6901 &read_acl(\%acl, \%uacl);
6902 my $risk = $gconfig{'risk_'.$base_remote_user};
6904 foreach my $minfo (&get_all_module_infos($_[0])) {
6905 next if (!&check_os_support($minfo));
6907 # Check module risk level
6908 next if ($risk ne 'high' && $minfo->{'risk'} &&
6909 $minfo->{'risk'} !~ /$risk/);
6913 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6914 !$acl{$base_remote_user,"*"});
6916 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6920 # Check usermod restrictions
6921 my @usermods = &list_usermods();
6922 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6923 &available_usermods(\@rv, \@usermods);
6925 # Check RBAC restrictions
6927 foreach my $m (@rv) {
6928 if (&supports_rbac($m->{'dir'}) &&
6929 &use_rbac_module_acl(undef, $m->{'dir'})) {
6930 local $rbacs = &get_rbac_module_acl($remote_user,
6938 # Module or system doesn't support RBAC
6939 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6945 if (defined(&theme_foreign_available)) {
6946 foreach my $m (@rbacrv) {
6947 if (&theme_foreign_available($m->{'dir'})) {
6956 # Check licence module vetos
6958 if ($main::licence_module) {
6959 foreach my $m (@themerv) {
6960 if (&foreign_call($main::licence_module,
6961 "check_module_licence", $m->{'dir'})) {
6973 =head2 get_visible_module_infos(nocache)
6975 Like get_available_module_infos, but excludes hidden modules from the list.
6976 Each element of the returned array is a hash reference in the same format as
6977 returned by get_module_info.
6980 sub get_visible_module_infos
6983 my $pn = &get_product_name();
6984 return grep { !$_->{'hidden'} &&
6985 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6988 =head2 get_visible_modules_categories(nocache)
6990 Returns a list of Webmin module categories, each of which is a hash ref
6991 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6992 of modules in the category, in the format returned by get_module_info.
6993 Un-used modules are automatically assigned to the 'unused' category, and
6994 those with no category are put into 'others'.
6997 sub get_visible_modules_categories
7000 my @mods = &get_visible_module_infos($nocache);
7002 if (&get_product_name() eq 'webmin') {
7003 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7004 @mods = grep { $_->{'installed'} ne '0' } @mods;
7006 my %cats = &list_categories(\@mods);
7008 foreach my $c (keys %cats) {
7009 my $cat = { 'code' => $c || 'other',
7010 'desc' => $cats{$c} };
7011 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7014 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7015 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7017 # Add un-installed modules in magic category
7018 my $cat = { 'code' => 'unused',
7019 'desc' => $text{'main_unused'},
7021 'modules' => \@unmods };
7027 =head2 is_under_directory(directory, file)
7029 Returns 1 if the given file is under the specified directory, 0 if not.
7030 Symlinks are taken into account in the file to find it's 'real' location.
7033 sub is_under_directory
7035 my ($dir, $file) = @_;
7036 return 1 if ($dir eq "/");
7037 return 0 if ($file =~ /\.\./);
7038 my $ld = &resolve_links($dir);
7040 return &is_under_directory($ld, $file);
7042 my $lp = &resolve_links($file);
7044 return &is_under_directory($dir, $lp);
7046 return 0 if (length($file) < length($dir));
7047 return 1 if ($dir eq $file);
7049 return substr($file, 0, length($dir)) eq $dir;
7052 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7054 Given an absolute URL, returns the host, port, page and ssl flag components.
7055 Relative URLs can also be parsed, if the base information is provided.
7060 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7062 my $ssl = $1 eq 'https';
7063 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
7069 elsif ($_[0] =~ /^\/\S*$/) {
7070 # A relative to the server URL
7071 return ($_[1], $_[2], $_[0], $_[4]);
7074 # A relative to the directory URL
7076 $page =~ s/[^\/]+$//;
7077 return ($_[1], $_[2], $page.$_[0], $_[4]);
7081 =head2 check_clicks_function
7083 Returns HTML for a JavaScript function called check_clicks that returns
7084 true when first called, but false subsequently. Useful on onClick for
7085 critical buttons. Deprecated, as this method of preventing duplicate actions
7089 sub check_clicks_function
7094 function check_clicks(form)
7101 for(i=0; i<form.length; i++)
7102 form.elements[i].disabled = true;
7111 =head2 load_entities_map
7113 Returns a hash ref containing mappings between HTML entities (like ouml) and
7114 ascii values (like 246). Mainly for internal use.
7117 sub load_entities_map
7119 if (!%entities_map_cache) {
7121 open(EMAP, "$root_directory/entities_map.txt");
7123 if (/^(\d+)\s+(\S+)/) {
7124 $entities_map_cache{$2} = $1;
7129 return \%entities_map_cache;
7132 =head2 entities_to_ascii(string)
7134 Given a string containing HTML entities like ö and 7, replace them
7135 with their ASCII equivalents.
7138 sub entities_to_ascii
7141 my $emap = &load_entities_map();
7142 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7143 $str =~ s/&#(\d+);/chr($1)/ge;
7147 =head2 get_product_name
7149 Returns either 'webmin' or 'usermin', depending on which program the current
7150 module is in. Useful for modules that can be installed into either.
7153 sub get_product_name
7155 return $gconfig{'product'} if (defined($gconfig{'product'}));
7156 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7161 Returns the character set for the current language, such as iso-8859-1.
7166 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7167 $current_lang_info->{'charset'} ?
7168 $current_lang_info->{'charset'} : $default_charset;
7172 =head2 get_display_hostname
7174 Returns the system's hostname for UI display purposes. This may be different
7175 from the actual hostname if you administrator has configured it so in the
7176 Webmin Configuration module.
7179 sub get_display_hostname
7181 if ($gconfig{'hostnamemode'} == 0) {
7182 return &get_system_hostname();
7184 elsif ($gconfig{'hostnamemode'} == 3) {
7185 return $gconfig{'hostnamedisplay'};
7188 my $h = $ENV{'HTTP_HOST'};
7190 if ($gconfig{'hostnamemode'} == 2) {
7191 $h =~ s/^(www|ftp|mail)\.//i;
7197 =head2 save_module_config([&config], [modulename])
7199 Saves the configuration for some module. The config parameter is an optional
7200 hash reference of names and values to save, which defaults to the global
7201 %config hash. The modulename parameter is the module to update the config
7202 file, which defaults to the current module.
7205 sub save_module_config
7207 my $c = $_[0] || { &get_module_variable('%config') };
7208 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7209 &write_file("$config_directory/$m/config", $c);
7212 =head2 save_user_module_config([&config], [modulename])
7214 Saves the user's Usermin preferences for some module. The config parameter is
7215 an optional hash reference of names and values to save, which defaults to the
7216 global %userconfig hash. The modulename parameter is the module to update the
7217 config file, which defaults to the current module.
7220 sub save_user_module_config
7222 my $c = $_[0] || { &get_module_variable('%userconfig') };
7223 my $m = $_[1] || &get_module_name();
7224 my $ucd = $user_config_directory;
7226 my @uinfo = @remote_user_info ? @remote_user_info
7227 : getpwnam($remote_user);
7228 return if (!@uinfo || !$uinfo[7]);
7229 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7231 &write_file("$ucd/$m/config", $c);
7234 =head2 nice_size(bytes, [min])
7236 Converts a number of bytes into a number followed by a suffix like GB, MB
7237 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7238 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7243 my ($units, $uname);
7244 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7245 $units = 1024*1024*1024*1024;
7248 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7249 $units = 1024*1024*1024;
7252 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7256 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7264 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7266 return $sz." ".$uname;
7269 =head2 get_perl_path
7271 Returns the path to Perl currently in use, such as /usr/bin/perl.
7276 if (open(PERL, "$config_directory/perl-path")) {
7282 return $^X if (-x $^X);
7283 return &has_command("perl");
7286 =head2 get_goto_module([&mods])
7288 Returns the details of a module that the current user should be re-directed
7289 to after logging in, or undef if none. Useful for themes.
7294 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7295 if ($gconfig{'gotomodule'}) {
7296 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7297 return $goto if ($goto);
7299 if (@mods == 1 && $gconfig{'gotoone'}) {
7305 =head2 select_all_link(field, form, [text])
7307 Returns HTML for a 'Select all' link that uses Javascript to select
7308 multiple checkboxes with the same name. The parameters are :
7310 =item field - Name of the checkbox inputs.
7312 =item form - Index of the form on the page.
7314 =item text - Message for the link, defaulting to 'Select all'.
7319 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7320 my ($field, $form, $text) = @_;
7322 $text ||= $text{'ui_selall'};
7323 return "<a class='select_all' href='#' onClick='document.forms[$form].$field.checked = true; for(i=0; i<document.forms[$form].$field.length; i++) { document.forms[$form].${field}[i].checked = true; } return false'>$text</a>";
7326 =head2 select_invert_link(field, form, text)
7328 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7329 selection on multiple checkboxes with the same name. The parameters are :
7331 =item field - Name of the checkbox inputs.
7333 =item form - Index of the form on the page.
7335 =item text - Message for the link, defaulting to 'Invert selection'.
7338 sub select_invert_link
7340 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7341 my ($field, $form, $text) = @_;
7343 $text ||= $text{'ui_selinv'};
7344 return "<a class='select_invert' href='#' onClick='document.forms[$form].$field.checked = !document.forms[$form].$field.checked; for(i=0; i<document.forms[$form].$field.length; i++) { document.forms[$form].${field}[i].checked = !document.forms[$form].${field}[i].checked; } return false'>$text</a>";
7347 =head2 select_rows_link(field, form, text, &rows)
7349 Returns HTML for a link that uses Javascript to select rows with particular
7350 values for their checkboxes. The parameters are :
7352 =item field - Name of the checkbox inputs.
7354 =item form - Index of the form on the page.
7356 =item text - Message for the link, de
7358 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7361 sub select_rows_link
7363 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7364 my ($field, $form, $text, $rows) = @_;
7366 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7367 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7368 $js .= "return false;";
7369 return "<a href='#' onClick='$js'>$text</a>";
7372 =head2 check_pid_file(file)
7374 Given a pid file, returns the PID it contains if the process is running.
7379 open(PIDFILE, $_[0]) || return undef;
7380 my $pid = <PIDFILE>;
7382 $pid =~ /^\s*(\d+)/ || return undef;
7383 kill(0, $1) || return undef;
7389 Return the local os-specific library name to this module. For internal use only.
7394 my $mn = &get_module_name();
7395 my $md = &module_root_directory($mn);
7396 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7397 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7399 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7400 return "$mn-$gconfig{'os_type'}-lib.pl";
7402 elsif (-r "$md/$mn-generic-lib.pl") {
7403 return "$mn-generic-lib.pl";
7410 =head2 module_root_directory(module)
7412 Given a module name, returns its root directory. On a typical Webmin install,
7413 all modules are under the same directory - but it is theoretically possible to
7417 sub module_root_directory
7419 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7420 if (@root_directories > 1) {
7421 foreach my $r (@root_directories) {
7427 return "$root_directories[0]/$d";
7430 =head2 list_mime_types
7432 Returns a list of all known MIME types and their extensions, as a list of hash
7433 references with keys :
7435 =item type - The MIME type, like text/plain.
7437 =item exts - A list of extensions, like .doc and .avi.
7439 =item desc - A human-readable description for the MIME type.
7444 if (!@list_mime_types_cache) {
7446 open(MIME, "$root_directory/mime.types");
7450 if (s/#\s*(.*)$//g) {
7453 my ($type, @exts) = split(/\s+/);
7455 push(@list_mime_types_cache, { 'type' => $type,
7462 return @list_mime_types_cache;
7465 =head2 guess_mime_type(filename, [default])
7467 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7468 The optional default parameter sets a default type of use if none is found,
7469 which defaults to application/octet-stream.
7474 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7476 foreach my $t (&list_mime_types()) {
7477 foreach my $e (@{$t->{'exts'}}) {
7478 return $t->{'type'} if (lc($e) eq lc($ext));
7482 return @_ > 1 ? $_[1] : "application/octet-stream";
7485 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7487 Opens a file handle for writing to a temporary file, which will only be
7488 renamed over the real file when the handle is closed. This allows critical
7489 files like /etc/shadow to be updated safely, even if writing fails part way
7490 through due to lack of disk space. The parameters are :
7492 =item handle - File handle to open, as you would use in Perl's open function.
7494 =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.
7496 =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 $! with the error code.
7498 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7500 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7506 # Just getting a temp file
7507 if (!defined($main::open_tempfiles{$_[0]})) {
7508 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7509 my $dir = $1 || "/";
7510 my $tmp = "$dir/$2.webmintmp.$$";
7511 $main::open_tempfiles{$_[0]} = $tmp;
7512 push(@main::temporary_files, $tmp);
7514 return $main::open_tempfiles{$_[0]};
7518 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7519 $fh = &callers_package($fh);
7521 my %gaccess = &get_module_acl(undef, "");
7522 my $db = $gconfig{'debug_what_write'};
7523 if ($file =~ /\r|\n|\0/) {
7524 if ($noerror) { return 0; }
7525 else { &error("Filename contains invalid characters"); }
7527 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7528 # Read-only mode .. veto all writes
7529 print STDERR "vetoing write to $file\n";
7530 return open($fh, ">$null_file");
7532 elsif ($file =~ /^(>|>>|)nul$/i) {
7533 # Write to Windows null device
7534 &webmin_debug_log($1 eq ">" ? "WRITE" :
7535 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7537 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7538 # Writes to /dev/null or TTYs don't need to be handled
7539 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7540 return open($fh, $file);
7542 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7543 &webmin_debug_log("WRITE", $1) if ($db);
7544 # Over-writing a file, via a temp file
7546 $file = &translate_filename($file);
7548 # Open the link target instead
7549 $file = &resolve_links($file);
7552 # Cannot open a directory!
7553 if ($noerror) { return 0; }
7554 else { &error("Cannot write to directory $file"); }
7556 my $tmp = &open_tempfile($file);
7557 my $ex = open($fh, ">$tmp");
7558 if (!$ex && $! =~ /permission/i) {
7559 # Could not open temp file .. try opening actual file
7561 $ex = open($fh, ">$file");
7562 delete($main::open_tempfiles{$file});
7565 $main::open_temphandles{$fh} = $file;
7568 if (!$ex && !$noerror) {
7569 &error(&text("efileopen", $file, $!));
7573 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7574 # Just writing direct to a file
7575 &webmin_debug_log("WRITE", $1) if ($db);
7577 $file = &translate_filename($file);
7578 my @old_attributes = &get_clear_file_attributes($file);
7579 my $ex = open($fh, ">$file");
7580 &reset_file_attributes($file, \@old_attributes);
7581 $main::open_temphandles{$fh} = $file;
7582 if (!$ex && !$noerror) {
7583 &error(&text("efileopen", $file, $!));
7588 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7589 # Appending to a file .. nothing special to do
7590 &webmin_debug_log("APPEND", $1) if ($db);
7592 $file = &translate_filename($file);
7593 my @old_attributes = &get_clear_file_attributes($file);
7594 my $ex = open($fh, ">>$file");
7595 &reset_file_attributes($file, \@old_attributes);
7596 $main::open_temphandles{$fh} = $file;
7597 if (!$ex && !$noerror) {
7598 &error(&text("efileopen", $file, $!));
7603 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7604 # Read mode .. nothing to do here
7605 &webmin_debug_log("READ", $file) if ($db);
7606 $file = &translate_filename($file);
7607 return open($fh, $file);
7609 elsif ($file eq ">" || $file eq ">>") {
7610 my ($package, $filename, $line) = caller;
7611 if ($noerror) { return 0; }
7612 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7615 my ($package, $filename, $line) = caller;
7616 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7621 =head2 close_tempfile(file|handle)
7623 Copies a temp file to the actual file, assuming that all writes were
7624 successful. The handle must have been one passed to open_tempfile.
7630 my $fh = &callers_package($_[0]);
7632 if (defined($file = $main::open_temphandles{$fh})) {
7634 close($fh) || &error(&text("efileclose", $file, $!));
7635 delete($main::open_temphandles{$fh});
7636 return &close_tempfile($file);
7638 elsif (defined($main::open_tempfiles{$_[0]})) {
7640 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7641 my @st = stat($_[0]);
7642 if (&is_selinux_enabled() && &has_command("chcon")) {
7643 # Set original security context
7644 system("chcon --reference=".quotemeta($_[0]).
7645 " ".quotemeta($main::open_tempfiles{$_[0]}).
7646 " >/dev/null 2>&1");
7648 my @old_attributes = &get_clear_file_attributes($_[0]);
7649 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7651 # Set original permissions and ownership
7652 chmod($st[2], $_[0]);
7653 chown($st[4], $st[5], $_[0]);
7655 &reset_file_attributes($_[0], \@old_attributes);
7656 delete($main::open_tempfiles{$_[0]});
7657 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7658 if ($main::open_templocks{$_[0]}) {
7659 &unlock_file($_[0]);
7660 delete($main::open_templocks{$_[0]});
7665 # Must be closing a handle not associated with a file
7671 =head2 print_tempfile(handle, text, ...)
7673 Like the normal print function, but calls &error on failure. Useful when
7674 combined with open_tempfile, to ensure that a criticial file is never
7675 only partially written.
7680 my ($fh, @args) = @_;
7681 $fh = &callers_package($fh);
7682 (print $fh @args) || &error(&text("efilewrite",
7683 $main::open_temphandles{$fh} || $fh, $!));
7686 =head2 is_selinux_enabled
7688 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7691 sub is_selinux_enabled
7693 if (!defined($main::selinux_enabled_cache)) {
7695 if ($gconfig{'os_type'} !~ /-linux$/) {
7696 # Not on linux, so no way
7697 $main::selinux_enabled_cache = 0;
7699 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7700 # Use global config file
7701 $main::selinux_enabled_cache =
7702 $seconfig{'SELINUX'} eq 'disabled' ||
7703 !$seconfig{'SELINUX'} ? 0 : 1;
7706 # Use selinuxenabled command
7707 #$selinux_enabled_cache =
7708 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7709 $main::selinux_enabled_cache = 0;
7712 return $main::selinux_enabled_cache;
7715 =head2 get_clear_file_attributes(file)
7717 Finds file attributes that may prevent writing, clears them and returns them
7718 as a list. May call error. Mainly for internal use by open_tempfile and
7722 sub get_clear_file_attributes
7726 if ($gconfig{'chattr'}) {
7727 # Get original immutable bit
7728 my $out = &backquote_command(
7729 "lsattr ".quotemeta($file)." 2>/dev/null");
7731 $out =~ s/\s\S+\n//;
7732 @old_attributes = grep { $_ ne '-' } split(//, $out);
7734 if (&indexof("i", @old_attributes) >= 0) {
7735 my $err = &backquote_logged(
7736 "chattr -i ".quotemeta($file)." 2>&1");
7738 &error("Failed to remove immutable bit on ".
7743 return @old_attributes;
7746 =head2 reset_file_attributes(file, &attributes)
7748 Put back cleared attributes on some file. May call error. Mainly for internal
7749 use by close_tempfile.
7752 sub reset_file_attributes
7754 my ($file, $old_attributes) = @_;
7755 if (&indexof("i", @$old_attributes) >= 0) {
7756 my $err = &backquote_logged(
7757 "chattr +i ".quotemeta($file)." 2>&1");
7759 &error("Failed to restore immutable bit on ".
7765 =head2 cleanup_tempnames
7767 Remove all temporary files generated using transname. Typically only called
7768 internally when a Webmin script exits.
7771 sub cleanup_tempnames
7773 foreach my $t (@main::temporary_files) {
7776 @main::temporary_files = ( );
7779 =head2 open_lock_tempfile([handle], file, [no-error])
7781 Returns a temporary file for writing to some actual file, and also locks it.
7782 Effectively the same as calling lock_file and open_tempfile on the same file,
7783 but calls the unlock for you automatically when it is closed.
7786 sub open_lock_tempfile
7788 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7789 $fh = &callers_package($fh);
7790 my $lockfile = $file;
7791 $lockfile =~ s/^[^\/]*//;
7792 if ($lockfile =~ /^\//) {
7793 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7795 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7800 $main::end_exit_status ||= $?;
7801 if ($$ == $main::initial_process_id) {
7802 # Exiting from initial process
7803 &cleanup_tempnames();
7804 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7805 $main::debug_log_start_module eq &get_module_name()) {
7806 my $len = time() - $main::debug_log_start_time;
7807 &webmin_debug_log("STOP", "runtime=$len");
7808 $main::debug_log_start_time = 0;
7810 if (!$ENV{'SCRIPT_NAME'} &&
7811 $main::initial_module_name eq &get_module_name()) {
7812 # In a command-line script - call the real exit, so that the
7813 # exit status gets properly propogated. In some cases this
7814 # was not happening.
7815 exit($main::end_exit_status);
7820 =head2 month_to_number(month)
7822 Converts a month name like feb to a number like 1.
7827 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7830 =head2 number_to_month(number)
7832 Converts a number like 1 to a month name like Feb.
7837 return ucfirst($number_to_month_map{$_[0]});
7840 =head2 get_rbac_module_acl(user, module)
7842 Returns a hash reference of RBAC overrides ACLs for some user and module.
7843 May return undef if none exist (indicating access denied), or the string *
7844 if full access is granted.
7847 sub get_rbac_module_acl
7849 my ($user, $mod) = @_;
7850 eval "use Authen::SolarisRBAC";
7851 return undef if ($@);
7854 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7855 # Automagic webmin.modulename.admin authorization exists .. allow access
7857 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7858 %rv = ( 'noconfig' => 1 );
7865 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7869 my ($auths, $acls) = split(/\s+/, $_);
7870 my @auths = split(/,/, $auths);
7872 my ($merge) = ($acls =~ s/^\+//);
7874 if ($auths eq "*") {
7875 # These ACLs apply to all RBAC users.
7876 # Only if there is some that match a specific authorization
7877 # later will they be used though.
7880 # Check each of the RBAC authorizations
7881 foreach my $a (@auths) {
7882 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7887 $foundany++ if ($gotall);
7890 # Found an RBAC authorization - return the ACLs
7891 return "*" if ($acls eq "*");
7892 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7894 # Just add to current set
7895 foreach my $a (keys %acl) {
7906 return !$foundany ? undef : %rv ? \%rv : undef;
7909 =head2 supports_rbac([module])
7911 Returns 1 if RBAC client support is available, such as on Solaris.
7916 return 0 if ($gconfig{'os_type'} ne 'solaris');
7917 eval "use Authen::SolarisRBAC";
7920 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7925 =head2 use_rbac_module_acl(user, module)
7927 Returns 1 if some user should use RBAC to get permissions for a module
7930 sub use_rbac_module_acl
7932 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7933 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7934 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7935 my %access = &get_module_acl($u, $m, 1);
7936 return $access{'rbac'} ? 1 : 0;
7939 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7941 Runs some command, possibly feeding it input and capturing output to the
7942 give files or scalar references. The parameters are :
7944 =item command - Full command to run, possibly including shell meta-characters.
7946 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7948 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7950 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7952 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7954 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7959 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7960 if (&is_readonly_mode() && !$safe) {
7961 print STDERR "Vetoing command $_[0]\n";
7965 $cmd = &translate_command($cmd);
7967 # Use ` operator where possible
7968 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7969 if (!$stdin && ref($stdout) && !$stderr) {
7970 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7971 $$stdout = `$cmd 2>$null_file`;
7974 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7975 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7976 $$stdout = `$cmd 2>&1`;
7979 elsif (!$stdin && !$stdout && !$stderr) {
7980 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7981 return system("$cmd >$null_file 2>$null_file <$null_file");
7985 $| = 1; # needed on some systems to flush before forking
7986 pipe(EXECSTDINr, EXECSTDINw);
7987 pipe(EXECSTDOUTr, EXECSTDOUTw);
7988 pipe(EXECSTDERRr, EXECSTDERRw);
7990 if (!($pid = fork())) {
7994 open(STDIN, "<&EXECSTDINr");
7995 open(STDOUT, ">&EXECSTDOUTw");
7996 if (ref($stderr) && $stderr eq $stdout) {
7997 open(STDERR, ">&EXECSTDOUTw");
8000 open(STDERR, ">&EXECSTDERRw");
8007 my $fullcmd = "($cmd)";
8008 if ($stdin && !ref($stdin)) {
8009 $fullcmd .= " <$stdin";
8011 if ($stdout && !ref($stdout)) {
8012 $fullcmd .= " >$stdout";
8014 if ($stderr && !ref($stderr)) {
8015 if ($stderr eq $stdout) {
8016 $fullcmd .= " 2>&1";
8019 $fullcmd .= " 2>$stderr";
8022 if ($gconfig{'os_type'} eq 'windows') {
8026 exec("/bin/sh", "-c", $fullcmd);
8028 print "Exec failed : $!\n";
8035 # Feed input and capture output
8037 if ($stdin && ref($stdin)) {
8038 print EXECSTDINw $$stdin;
8041 if ($stdout && ref($stdout)) {
8043 while(<EXECSTDOUTr>) {
8048 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8050 while(<EXECSTDERRr>) {
8061 =head2 open_readfile(handle, file)
8063 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8064 exactly the same as Perl's open function.
8069 my ($fh, $file) = @_;
8070 $fh = &callers_package($fh);
8071 my $realfile = &translate_filename($file);
8072 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8073 return open($fh, "<".$realfile);
8076 =head2 open_execute_command(handle, command, output?, safe?)
8078 Runs some command, with the specified file handle set to either write to it if
8079 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8080 indicates if the command modifies the state of the system or not.
8083 sub open_execute_command
8085 my ($fh, $cmd, $mode, $safe) = @_;
8086 $fh = &callers_package($fh);
8087 my $realcmd = &translate_command($cmd);
8088 if (&is_readonly_mode() && !$safe) {
8089 # Don't actually run it
8090 print STDERR "vetoing command $cmd\n";
8093 return open($fh, ">$null_file");
8096 return open($fh, $null_file);
8100 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8101 if ($gconfig{'debug_what_cmd'});
8103 return open($fh, "| $cmd");
8105 elsif ($mode == 1) {
8106 return open($fh, "$cmd 2>$null_file |");
8108 elsif ($mode == 2) {
8109 return open($fh, "$cmd 2>&1 |");
8113 =head2 translate_filename(filename)
8115 Applies all relevant registered translation functions to a filename. Mostly
8116 for internal use, and typically does nothing.
8119 sub translate_filename
8121 my ($realfile) = @_;
8122 my @funcs = grep { $_->[0] eq &get_module_name() ||
8123 !defined($_->[0]) } @main::filename_callbacks;
8124 foreach my $f (@funcs) {
8126 $realfile = &$func($realfile, @{$f->[2]});
8131 =head2 translate_command(filename)
8133 Applies all relevant registered translation functions to a command. Mostly
8134 for internal use, and typically does nothing.
8137 sub translate_command
8140 my @funcs = grep { $_->[0] eq &get_module_name() ||
8141 !defined($_->[0]) } @main::command_callbacks;
8142 foreach my $f (@funcs) {
8144 $realcmd = &$func($realcmd, @{$f->[2]});
8149 =head2 register_filename_callback(module|undef, &function, &args)
8151 Registers some function to be called when the specified module (or all
8152 modules) tries to open a file for reading and writing. The function must
8153 return the actual file to open. This allows you to override which files
8154 other code actually operates on, via the translate_filename function.
8157 sub register_filename_callback
8159 my ($mod, $func, $args) = @_;
8160 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8163 =head2 register_command_callback(module|undef, &function, &args)
8165 Registers some function to be called when the specified module (or all
8166 modules) tries to execute a command. The function must return the actual
8167 command to run. This allows you to override which commands other other code
8168 actually runs, via the translate_command function.
8171 sub register_command_callback
8173 my ($mod, $func, $args) = @_;
8174 push(@main::command_callbacks, [ $mod, $func, $args ]);
8177 =head2 capture_function_output(&function, arg, ...)
8179 Captures output that some function prints to STDOUT, and returns it. Useful
8180 for functions outside your control that print data when you really want to
8181 manipulate it before output.
8184 sub capture_function_output
8186 my ($func, @args) = @_;
8187 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8188 my $old = select(SOCKET1);
8189 my @rv = &$func(@args);
8198 return wantarray ? ($out, \@rv) : $out;
8201 =head2 capture_function_output_tempfile(&function, arg, ...)
8203 Behaves the same as capture_function_output, but uses a temporary file
8204 to avoid buffer full problems.
8207 sub capture_function_output_tempfile
8209 my ($func, @args) = @_;
8210 my $temp = &transname();
8211 open(BUFFER, ">$temp");
8212 my $old = select(BUFFER);
8213 my @rv = &$func(@args);
8216 my $out = &read_file_contents($temp);
8217 &unlink_file($temp);
8218 return wantarray ? ($out, \@rv) : $out;
8221 =head2 modules_chooser_button(field, multiple, [form])
8223 Returns HTML for a button for selecting one or many Webmin modules.
8224 field - Name of the HTML field to place the module names into.
8225 multiple - Set to 1 if multiple modules can be selected.
8226 form - Index of the form on the page.
8229 sub modules_chooser_button
8231 return &theme_modules_chooser_button(@_)
8232 if (defined(&theme_modules_chooser_button));
8233 my $form = defined($_[2]) ? $_[2] : 0;
8234 my $w = $_[1] ? 700 : 500;
8236 if ($_[1] && $gconfig{'db_sizemodules'}) {
8237 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8239 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8240 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8242 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";
8245 =head2 substitute_template(text, &hash)
8247 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8248 the text replaces it with the value of the hash key foo. Also supports blocks
8249 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8250 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8253 sub substitute_template
8255 # Add some extra fixed parameters to the hash
8256 my %hash = %{$_[1]};
8257 $hash{'hostname'} = &get_system_hostname();
8258 $hash{'webmin_config'} = $config_directory;
8259 $hash{'webmin_etc'} = $config_directory;
8260 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8261 $hash{'webmin_var'} = $var_directory;
8263 # Add time-based parameters, for use in DNS
8264 $hash{'current_time'} = time();
8265 my @tm = localtime($hash{'current_time'});
8266 $hash{'current_year'} = $tm[5]+1900;
8267 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8268 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8269 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8270 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8271 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8273 # Actually do the substition
8275 foreach my $s (keys %hash) {
8276 next if ($s eq ''); # Prevent just $ from being subbed
8279 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8280 $rv =~ s/\$\Q$us\E/$sv/g;
8282 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8283 # and ${IF}..${ENDIF} with value
8284 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8285 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8287 # Replace $IF..$ELSE..$ENDIF block with first value,
8288 # and $IF..$ENDIF with value
8289 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8290 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8292 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8293 # matching, nothing if not
8294 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8295 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8297 # Replace $IFEQ..$ENDIFEQ block with first value if
8298 # matching, nothing if not
8299 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8300 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8303 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8304 # and ${IF}..${ENDIF} with nothing
8305 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8306 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8308 # Replace $IF..$ELSE..$ENDIF block with second value,
8309 # and $IF..$ENDIF with nothing
8310 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8311 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8313 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8314 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8315 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8319 # Now assume any $IF blocks whose variables are not present in the hash
8320 # evaluate to false.
8321 # $IF...$ELSE x $ENDIF => x
8322 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8323 # $IF...x...$ENDIF => (nothing)
8324 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8325 # ${var} => (nothing)
8326 $rv =~ s/\$\{[A-Z]+\}//g;
8331 =head2 running_in_zone
8333 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8334 disable module and features that are not appropriate, like those that modify
8335 mounted filesystems.
8340 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8341 $gconfig{'os_version'} < 10);
8342 my $zn = `zonename 2>$null_file`;
8344 return $zn && $zn ne "global";
8347 =head2 running_in_vserver
8349 Returns 1 if the current Webmin instance is running in a Linux VServer.
8350 Used to disable modules and features that are not appropriate.
8353 sub running_in_vserver
8355 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8358 open(MTAB, "/etc/mtab");
8360 my ($dev, $mp) = split(/\s+/, $_);
8361 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8370 =head2 running_in_xen
8372 Returns 1 if Webmin is running inside a Xen instance, by looking
8373 at /proc/xen/capabilities.
8378 return 0 if (!-r "/proc/xen/capabilities");
8379 my $cap = &read_file_contents("/proc/xen/capabilities");
8380 return $cap =~ /control_d/ ? 0 : 1;
8383 =head2 running_in_openvz
8385 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8386 at /proc/vz/veinfo for a non-zero line.
8389 sub running_in_openvz
8391 return 0 if (!-r "/proc/vz/veinfo");
8392 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8393 return 0 if (!$lref || !@$lref);
8394 foreach my $l (@$lref) {
8396 my @ll = split(/\s+/, $l);
8397 return 0 if ($ll[0] eq '0');
8402 =head2 list_categories(&modules, [include-empty])
8404 Returns a hash mapping category codes to names, including any custom-defined
8405 categories. The modules parameter must be an array ref of module hash objects,
8406 as returned by get_all_module_infos.
8411 my ($mods, $empty) = @_;
8412 my (%cats, %catnames);
8413 &read_file("$config_directory/webmin.catnames", \%catnames);
8414 foreach my $o (@lang_order_list) {
8415 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8420 foreach my $m (@$mods) {
8421 my $c = $m->{'category'};
8422 next if ($cats{$c});
8423 if (defined($catnames{$c})) {
8424 $cats{$c} = $catnames{$c};
8426 elsif ($text{"category_$c"}) {
8427 $cats{$c} = $text{"category_$c"};
8430 # try to get category name from module ..
8431 my %mtext = &load_language($m->{'dir'});
8432 if ($mtext{"category_$c"}) {
8433 $cats{$c} = $mtext{"category_$c"};
8436 $c = $m->{'category'} = "";
8437 $cats{$c} = $text{"category_$c"};
8444 =head2 is_readonly_mode
8446 Returns 1 if the current user is in read-only mode, and thus all writes
8447 to files and command execution should fail.
8450 sub is_readonly_mode
8452 if (!defined($main::readonly_mode_cache)) {
8453 my %gaccess = &get_module_acl(undef, "");
8454 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8456 return $main::readonly_mode_cache;
8459 =head2 command_as_user(user, with-env?, command, ...)
8461 Returns a command to execute some command as the given user, using the
8462 su statement. If on Linux, the /bin/sh shell is forced in case the user
8463 does not have a valid shell. If with-env is set to 1, the -s flag is added
8464 to the su command to read the user's .profile or .bashrc file.
8469 my ($user, $env, @args) = @_;
8470 my @uinfo = getpwnam($user);
8471 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8472 # User shell doesn't appear to be valid
8473 if ($gconfig{'os_type'} =~ /-linux$/) {
8474 # Use -s /bin/sh to force it
8475 $shellarg = " -s /bin/sh";
8477 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8478 $gconfig{'os_type'} eq 'solaris' &&
8479 $gconfig{'os_version'} >= 11 ||
8480 $gconfig{'os_type'} eq 'macos') {
8481 # Use -m and force /bin/sh
8482 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8486 my $rv = "su".($env ? " -" : "").$shellarg.
8487 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8491 =head2 list_osdn_mirrors(project, file)
8493 This function is now deprecated in favor of letting sourceforge just
8494 redirect to the best mirror, and now just returns their primary download URL.
8497 sub list_osdn_mirrors
8499 my ($project, $file) = @_;
8500 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8502 'mirror' => 'downloads' } );
8505 =head2 convert_osdn_url(url)
8507 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8508 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8509 to a real URL on the sourceforge download redirector.
8512 sub convert_osdn_url
8515 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8516 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8517 # Always use the Sourceforge mail download URL, which does
8518 # a location-based redirect for us
8519 my ($project, $file) = ($1, $2);
8520 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8522 return wantarray ? ( $url, 0 ) : $url;
8525 # Some other source .. don't change
8526 return wantarray ? ( $url, 2 ) : $url;
8530 =head2 get_current_dir
8532 Returns the directory the current process is running in.
8538 if ($gconfig{'os_type'} eq 'windows') {
8551 =head2 supports_users
8553 Returns 1 if the current OS supports Unix user concepts and functions like
8554 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8560 return $gconfig{'os_type'} ne 'windows';
8563 =head2 supports_symlinks
8565 Returns 1 if the current OS supports symbolic and hard links. This will not
8566 be the case on Windows.
8569 sub supports_symlinks
8571 return $gconfig{'os_type'} ne 'windows';
8574 =head2 quote_path(path)
8576 Returns a path with safe quoting for the current operating system.
8582 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8583 # Windows only supports "" style quoting
8587 return quotemeta($path);
8591 =head2 get_windows_root
8593 Returns the base windows system directory, like c:/windows.
8596 sub get_windows_root
8598 if ($ENV{'SystemRoot'}) {
8599 my $rv = $ENV{'SystemRoot'};
8604 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8608 =head2 read_file_contents(file)
8610 Given a filename, returns its complete contents as a string. Effectively
8611 the same as the Perl construct `cat file`.
8614 sub read_file_contents
8616 &open_readfile(FILE, $_[0]) || return undef;
8623 =head2 unix_crypt(password, salt)
8625 Performs Unix encryption on a password, using the built-in crypt function or
8626 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8627 must be either an already-hashed password, or a two-character alpha-numeric
8633 my ($pass, $salt) = @_;
8634 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8635 my $rv = eval "crypt(\$pass, \$salt)";
8637 return $rv if ($rv && !$@);
8638 eval "use Crypt::UnixCrypt";
8640 return Crypt::UnixCrypt::crypt($pass, $salt);
8643 &error("Failed to encrypt password : $err");
8647 =head2 split_quoted_string(string)
8649 Given a string like I<foo "bar baz" quux>, returns the array :
8653 sub split_quoted_string
8657 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8658 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8659 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8666 =head2 write_to_http_cache(url, file|&data)
8668 Updates the Webmin cache with the contents of the given file, possibly also
8669 clearing out old data. Mainly for internal use by http_download.
8672 sub write_to_http_cache
8674 my ($url, $file) = @_;
8675 return 0 if (!$gconfig{'cache_size'});
8677 # Don't cache downloads that look dynamic
8678 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8682 # Check if the current module should do caching
8683 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8684 # Caching all except some modules
8685 my @mods = split(/\s+/, $1);
8686 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8688 elsif ($gconfig{'cache_mods'}) {
8689 # Only caching some modules
8690 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8691 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8697 $size = length($$file);
8700 my @st = stat($file);
8704 if ($size > $gconfig{'cache_size'}) {
8705 # Bigger than the whole cache - so don't save it
8710 $cfile = "$main::http_cache_directory/$cfile";
8712 # See how much we have cached currently, clearing old files
8714 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8715 opendir(CACHEDIR, $main::http_cache_directory);
8716 foreach my $f (readdir(CACHEDIR)) {
8717 next if ($f eq "." || $f eq "..");
8718 my $path = "$main::http_cache_directory/$f";
8719 my @st = stat($path);
8720 if ($gconfig{'cache_days'} &&
8721 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8722 # This file is too old .. trash it
8727 push(@cached, [ $path, $st[7], $st[9] ]);
8731 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8732 while($total+$size > $gconfig{'cache_size'} && @cached) {
8733 # Cache is too big .. delete some files until the new one will fit
8734 unlink($cached[0]->[0]);
8735 $total -= $cached[0]->[1];
8739 # Finally, write out the new file
8741 &open_tempfile(CACHEFILE, ">$cfile");
8742 &print_tempfile(CACHEFILE, $$file);
8743 &close_tempfile(CACHEFILE);
8746 my ($ok, $err) = ©_source_dest($file, $cfile);
8752 =head2 check_in_http_cache(url)
8754 If some URL is in the cache and valid, return the filename for it. Mainly
8755 for internal use by http_download.
8758 sub check_in_http_cache
8761 return undef if (!$gconfig{'cache_size'});
8763 # Check if the current module should do caching
8764 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8765 # Caching all except some modules
8766 my @mods = split(/\s+/, $1);
8767 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8769 elsif ($gconfig{'cache_mods'}) {
8770 # Only caching some modules
8771 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8772 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8777 $cfile = "$main::http_cache_directory/$cfile";
8778 my @st = stat($cfile);
8779 return undef if (!@st || !$st[7]);
8780 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8785 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8790 =head2 supports_javascript
8792 Returns 1 if the current browser is assumed to support javascript.
8795 sub supports_javascript
8797 if (defined(&theme_supports_javascript)) {
8798 return &theme_supports_javascript();
8800 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8803 =head2 get_module_name
8805 Returns the name of the Webmin module that called this function. For internal
8806 use only by other API functions.
8811 return &get_module_variable('$module_name');
8814 =head2 get_module_variable(name, [ref])
8816 Returns the value of some variable which is set in the caller's context, if
8817 using the new WebminCore package. For internal use only.
8820 sub get_module_variable
8822 my ($v, $wantref) = @_;
8823 my $slash = $wantref ? "\\" : "";
8824 my $thispkg = &web_libs_package();
8825 if ($thispkg eq 'WebminCore') {
8826 my ($vt, $vn) = split('', $v, 2);
8828 for(my $i=0; ($callpkg) = caller($i); $i++) {
8829 last if ($callpkg ne $thispkg);
8831 return eval "${slash}${vt}${callpkg}::${vn}";
8833 return eval "${slash}${v}";
8836 =head2 clear_time_locale()
8838 Temporarily force the locale to C, until reset_time_locale is called. This is
8839 useful if your code is going to call C<strftime> from the POSIX package, and
8840 you want to ensure that the output is in a consistent format.
8843 sub clear_time_locale
8845 if ($main::clear_time_locale_count == 0) {
8848 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8849 POSIX::setlocale(POSIX::LC_TIME, "C");
8852 $main::clear_time_locale_count++;
8855 =head2 reset_time_locale()
8857 Revert the locale to whatever it was before clear_time_locale was called
8860 sub reset_time_locale
8862 if ($main::clear_time_locale_count == 1) {
8864 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8865 $main::clear_time_locale_old = undef;
8868 $main::clear_time_locale_count--;
8871 =head2 callers_package(filehandle)
8873 Convert a non-module filehandle like FOO to one qualified with the
8874 caller's caller's package, like fsdump::FOO. For internal use only.
8880 my $callpkg = (caller(1))[0];
8881 my $thispkg = &web_libs_package();
8882 if (!ref($fh) && $fh !~ /::/ &&
8883 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8884 $fh = $callpkg."::".$fh;
8889 =head2 web_libs_package()
8891 Returns the package this code is in. We can't always trust __PACKAGE__. For
8895 sub web_libs_package
8897 if ($called_from_webmin_core) {
8898 return "WebminCore";
8903 =head2 get_userdb_string
8905 Returns the URL-style string for connecting to the users and groups database
8908 sub get_userdb_string
8911 &get_miniserv_config(\%miniserv);
8912 return $miniserv{'userdb'};
8915 =head2 connect_userdb(string)
8917 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
8918 On failure returns an error message string. In an array context, returns the
8925 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
8926 if ($proto eq "mysql") {
8927 # Connect to MySQL with DBI
8928 my $drh = eval "use DBI; DBI->install_driver('mysql');";
8929 $drh || return $text{'sql_emysqldriver'};
8930 my ($host, $port) = split(/:/, $host);
8931 my $cstr = "database=$prefix;host=$host";
8932 $cstr .= ";port=$port" if ($port);
8933 my $dbh = $drh->connect($cstr, $user, $pass, { });
8934 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
8935 return wantarray ? ($dbh, $proto) : $dbh;
8937 elsif ($proto eq "postgresql") {
8938 # Connect to PostgreSQL with DBI
8939 my $drh = eval "use DBI; DBI->install_driver('Pg');";
8940 $drh || return $text{'sql_epostgresqldriver'};
8941 my ($host, $port) = split(/:/, $host);
8942 my $cstr = "dbname=$prefix;host=$host";
8943 $cstr .= ";port=$port" if ($port);
8944 my $dbh = $drh->connect($cstr, $user, $pass);
8945 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
8946 return wantarray ? ($dbh, $proto) : $dbh;
8948 elsif ($proto eq "ldap") {
8950 return "LDAP not done yet";
8953 return "Unknown protocol $proto";
8957 =head2 disconnect_userdb(string, &handle)
8959 Closes a handle opened by connect_userdb
8962 sub disconnect_userdb
8965 if ($str =~ /^(mysql|postgresql):/) {
8969 elsif ($str =~ /^ldap:/) {
8975 =head2 split_userdb_string(string)
8977 Converts a string like mysql://user:pass@host/db into separate parts
8980 sub split_userdb_string
8983 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
8984 my ($proto, $user, $pass, $host, $prefix, $argstr) =
8985 ($1, $2, $3, $4, $5, $7);
8986 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
8987 return ($proto, $user, $pass, $host, $prefix, \%args);
8992 $done_web_lib_funcs = 1;