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'}) {
793 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
800 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
801 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
802 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
803 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
804 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
805 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
806 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
808 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
810 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
811 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
812 if (defined(&theme_prebody)) {
815 my $hostname = &get_display_hostname();
816 my $version = &get_webmin_version();
817 my $prebody = $tconfig{'prebody'};
819 $prebody =~ s/%HOSTNAME%/$hostname/g;
820 $prebody =~ s/%VERSION%/$version/g;
821 $prebody =~ s/%USER%/$remote_user/g;
822 $prebody =~ s/%OS%/$os_type $os_version/g;
825 if ($tconfig{'prebodyinclude'}) {
827 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
834 print $tconfig{'preheader'};
835 my %this_module_info = &get_module_info(&get_module_name());
836 print "<table class='header' width=100%><tr>\n";
837 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
838 print "<td id='headln1' colspan=3 align=center>\n";
839 print &get_html_status_line(1);
840 print "</td></tr> <tr>\n";
842 print "<td id='headln2l' width=15% valign=top align=left>";
843 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
844 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
845 "$text{'header_servers'}</a><br>\n";
847 if (!$_[5] && !$tconfig{'noindex'}) {
848 my @avail = &get_available_module_infos(1);
849 my $nolo = $ENV{'ANONYMOUS_USER'} ||
850 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
851 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
852 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
854 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
855 "$text{'main_logout'}</a><br>";
857 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
858 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
859 "$text{'main_switch'}</a><br>";
861 elsif (!$gconfig{'gotoone'} || @avail > 1) {
862 print "<a href='$gconfig{'webprefix'}/?cat=",
863 $this_module_info{'category'},
864 "'>$text{'header_webmin'}</a><br>\n";
867 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
868 my $idx = $this_module_info{'index_link'};
869 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
870 my $mt = $module_index_name || $text{'header_module'};
871 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
873 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
874 !$tconfig{'nohelp'}) {
875 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
878 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
879 !$tconfig{'nohelp'}) {
880 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
883 my %access = &get_module_acl();
884 if (!$access{'noconfig'} && !$config{'noprefs'}) {
885 my $cprog = $user_module_config_directory ?
886 "uconfig.cgi" : "config.cgi";
887 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
888 &get_module_name()."\">",
889 $text{'header_config'},"</a><br>\n";
894 # Title is a single image
895 print "<td id='headln2c' align=center width=70%>",
896 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
900 my $ts = defined($tconfig{'titlesize'}) ?
901 $tconfig{'titlesize'} : "+2";
902 print "<td id='headln2c' align=center width=70%>",
903 ($ts ? "<font size=$ts>" : ""),$_[0],
904 ($ts ? "</font>" : "");
905 print "<br>$_[9]\n" if ($_[9]);
908 print "<td id='headln2r' width=15% valign=top align=right>";
910 print "</td></tr></table>\n";
911 print $tconfig{'postheader'};
915 =head2 get_html_title(title)
917 Returns the full string to appear in the HTML <title> block.
924 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
925 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
926 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
927 $title = sprintf "%s : %s on %s (%s %s)\n",
928 $msg, $remote_user, &get_display_hostname(),
929 $os_type, $os_version;
931 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
932 $title = sprintf "%s on %s (%s %s)\n",
933 $remote_user, &get_display_hostname(),
934 $os_type, $os_version;
939 if ($gconfig{'showlogin'} && $remote_user) {
940 $title = $remote_user." : ".$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 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
972 &text('main_title', &get_webmin_version(), $host, $ostr);
973 if ($gconfig{'showlogin'}) {
974 $title = $remote_user." : ".$title;
980 =head2 get_html_status_line(text-only)
982 Returns HTML for a script block that sets the status line, or if text-only
983 is set to 1, just return the status line text.
986 sub get_html_status_line
989 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
990 # Disabled in this mode
993 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
994 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
995 my $line = &text('header_statusmsg',
996 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
998 ($ENV{'SSL_USER'} ? " (SSL certified)" :
999 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1000 $text{'programname'},
1001 &get_webmin_version(),
1002 &get_display_hostname(),
1003 $os_type.($os_version eq "*" ? "" :" $os_version"));
1008 $line =~ s/\r|\n//g;
1009 return "<script language=JavaScript type=text/javascript>\n".
1010 "defaultStatus=\""."e_escape($line)."\";\n".
1015 =head2 popup_header([title], [head-stuff], [body-stuff])
1017 Outputs a page header, suitable for a popup window. If no title is given,
1018 absolutely no decorations are output. Also useful in framesets. The parameters
1021 =item title - Title text for the popup window.
1023 =item head-stuff - HTML to appear in the <head> section.
1025 =item body-stuff - HTML attributes to be include in the <body> tag.
1030 return if ($main::done_webmin_header++);
1032 my $charset = defined($main::force_charset) ? $main::force_charset
1034 &PrintHeader($charset);
1035 &load_theme_library();
1036 if (defined(&theme_popup_header)) {
1037 &theme_popup_header(@_);
1040 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1043 if (defined(&theme_popup_prehead)) {
1044 &theme_popup_prehead(@_);
1046 print "<title>$_[0]</title>\n";
1048 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1049 if ($tconfig{'headinclude'}) {
1051 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
1058 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1059 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1060 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1061 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1062 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1063 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1064 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1066 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1067 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1068 if (defined(&theme_popup_prebody)) {
1069 &theme_popup_prebody(@_);
1073 =head2 footer([page, name]+, [noendbody])
1075 Outputs the footer for a Webmin HTML page, possibly with links back to other
1076 pages. The links are specified by pairs of parameters, the first of which is
1077 a link destination, and the second the link text. For example :
1079 footer('/', 'Webmin index', '', 'Module menu');
1084 &load_theme_library();
1085 my %this_module_info = &get_module_info(&get_module_name());
1086 if (defined(&theme_footer)) {
1087 $module_name = &get_module_name(); # Old themes use these
1088 %module_info = %this_module_info;
1092 for(my $i=0; $i+1<@_; $i+=2) {
1094 if ($url ne '/' || !$tconfig{'noindex'}) {
1096 $url = "/?cat=$this_module_info{'category'}";
1098 elsif ($url eq '' && &get_module_name()) {
1099 $url = "/".&get_module_name()."/".
1100 $this_module_info{'index_link'};
1102 elsif ($url =~ /^\?/ && &get_module_name()) {
1103 $url = "/".&get_module_name()."/$url";
1105 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1107 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1112 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1117 my $postbody = $tconfig{'postbody'};
1119 my $hostname = &get_display_hostname();
1120 my $version = &get_webmin_version();
1121 my $os_type = $gconfig{'real_os_type'} ||
1122 $gconfig{'os_type'};
1123 my $os_version = $gconfig{'real_os_version'} ||
1124 $gconfig{'os_version'};
1125 $postbody =~ s/%HOSTNAME%/$hostname/g;
1126 $postbody =~ s/%VERSION%/$version/g;
1127 $postbody =~ s/%USER%/$remote_user/g;
1128 $postbody =~ s/%OS%/$os_type $os_version/g;
1129 print "$postbody\n";
1131 if ($tconfig{'postbodyinclude'}) {
1133 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1139 if (defined(&theme_postbody)) {
1140 &theme_postbody(@_);
1142 print "</body></html>\n";
1148 Outputs html for a footer for a popup window, started by popup_header.
1153 &load_theme_library();
1154 if (defined(&theme_popup_footer)) {
1155 &theme_popup_footer(@_);
1158 print "</body></html>\n";
1161 =head2 load_theme_library
1163 Immediately loads the current theme's theme.pl file. Not generally useful for
1164 most module developers, as this is called automatically by the header function.
1167 sub load_theme_library
1169 return if (!$current_theme || $loaded_theme_library++);
1170 for(my $i=0; $i<@theme_root_directories; $i++) {
1171 if ($theme_configs[$i]->{'functions'}) {
1172 do $theme_root_directories[$i]."/".
1173 $theme_configs[$i]->{'functions'};
1178 =head2 redirect(url)
1180 Output HTTP headers to redirect the browser to some page. The url parameter is
1181 typically a relative URL like index.cgi or list_users.cgi.
1186 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1187 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1188 ":$ENV{'SERVER_PORT'}";
1189 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1190 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1192 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1193 # Absolute URL (like http://...)
1196 elsif ($_[0] =~ /^\//) {
1197 # Absolute path (like /foo/bar.cgi)
1198 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1200 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1201 # Relative URL (like foo.cgi)
1202 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1205 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1207 &load_theme_library();
1208 if (defined(&theme_redirect)) {
1209 $module_name = &get_module_name(); # Old themes use these
1210 %module_info = &get_module_info($module_name);
1211 &theme_redirect($_[0], $url);
1214 print "Location: $url\n\n";
1218 =head2 kill_byname(name, signal)
1220 Finds a process whose command line contains the given name (such as httpd), and
1221 sends some signal to it. The signal can be numeric (like 9) or named
1227 my @pids = &find_byname($_[0]);
1228 return scalar(@pids) if (&is_readonly_mode());
1229 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1230 if ($gconfig{'debug_what_procs'});
1231 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1235 =head2 kill_byname_logged(name, signal)
1237 Like kill_byname, but also logs the killing.
1240 sub kill_byname_logged
1242 my @pids = &find_byname($_[0]);
1243 return scalar(@pids) if (&is_readonly_mode());
1244 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1248 =head2 find_byname(name)
1250 Finds processes searching for the given name in their command lines, and
1251 returns a list of matching PIDs.
1256 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1257 # Linux with /proc filesystem .. use cmdline files, as this is
1258 # faster than forking
1260 opendir(PROCDIR, "/proc");
1261 foreach my $f (readdir(PROCDIR)) {
1262 if ($f eq int($f) && $f != $$) {
1263 my $line = &read_file_contents("/proc/$f/cmdline");
1264 if ($line =~ /$_[0]/) {
1273 if (&foreign_check("proc")) {
1274 # Call the proc module
1275 &foreign_require("proc", "proc-lib.pl");
1276 if (defined(&proc::list_processes)) {
1277 my @procs = &proc::list_processes();
1279 foreach my $p (@procs) {
1280 if ($p->{'args'} =~ /$_[0]/) {
1281 push(@pids, $p->{'pid'});
1284 @pids = grep { $_ != $$ } @pids;
1289 # Fall back to running a command
1291 $cmd = $gconfig{'find_pid_command'};
1292 $cmd =~ s/NAME/"$_[0]"/g;
1293 $cmd = &translate_command($cmd);
1294 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1295 @pids = grep { $_ != $$ } @pids;
1299 =head2 error([message]+)
1301 Display an error message and exit. This should be used by CGI scripts that
1302 encounter a fatal error or invalid user input to notify users of the problem.
1303 If error_setup has been called, the displayed error message will be prefixed
1304 by the message setup using that function.
1309 my $msg = join("", @_);
1310 $msg =~ s/<[^>]*>//g;
1311 if (!$main::error_must_die) {
1312 print STDERR "Error: ",$msg,"\n";
1314 &load_theme_library();
1315 if ($main::error_must_die) {
1316 if ($gconfig{'error_stack'}) {
1317 print STDERR "Error: ",$msg,"\n";
1318 for(my $i=0; my @stack = caller($i); $i++) {
1319 print STDERR "File: $stack[1] Line: $stack[2] ",
1320 "Function: $stack[3]\n";
1325 elsif (!$ENV{'REQUEST_METHOD'}) {
1326 # Show text-only error
1327 print STDERR "$text{'error'}\n";
1328 print STDERR "-----\n";
1329 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1331 print STDERR "-----\n";
1332 if ($gconfig{'error_stack'}) {
1334 print STDERR $text{'error_stack'},"\n";
1335 for(my $i=0; my @stack = caller($i); $i++) {
1336 print STDERR &text('error_stackline',
1337 $stack[1], $stack[2], $stack[3]),"\n";
1342 elsif (defined(&theme_error)) {
1346 &header($text{'error'}, "");
1348 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1350 if ($gconfig{'error_stack'}) {
1352 print "<h3>$text{'error_stack'}</h3>\n";
1354 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1355 "<td><b>$text{'error_line'}</b></td> ",
1356 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1357 for($i=0; my @stack = caller($i); $i++) {
1359 print "<td>$stack[1]</td>\n";
1360 print "<td>$stack[2]</td>\n";
1361 print "<td>$stack[3]</td>\n";
1367 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1368 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1374 &unlock_all_files();
1375 &cleanup_tempnames();
1379 =head2 popup_error([message]+)
1381 This function is almost identical to error, but displays the message with HTML
1382 headers suitable for a popup window.
1387 &load_theme_library();
1388 if ($main::error_must_die) {
1391 elsif (defined(&theme_popup_error)) {
1392 &theme_popup_error(@_);
1395 &popup_header($text{'error'}, "");
1396 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1399 &unlock_all_files();
1400 &cleanup_tempnames();
1404 =head2 error_setup(message)
1406 Registers a message to be prepended to all error messages displayed by the
1412 $main::whatfailed = $_[0];
1415 =head2 wait_for(handle, regexp, regexp, ...)
1417 Reads from the input stream until one of the regexps matches, and returns the
1418 index of the matching regexp, or -1 if input ended before any matched. This is
1419 very useful for parsing the output of interactive programs, and can be used with
1420 a two-way pipe to feed input to a program in response to output matched by
1423 If the matching regexp contains bracketed sub-expressions, their values will
1424 be placed in the global array @matches, indexed starting from 1. You cannot
1425 use the Perl variables $1, $2 and so on to capture matches.
1429 $rv = wait_for($loginfh, "username:");
1431 error("Didn't get username prompt");
1433 print $loginfh "joe\n";
1434 $rv = wait_for($loginfh, "password:");
1436 error("Didn't get password prompt");
1438 print $loginfh "smeg\n";
1443 my ($c, $i, $sw, $rv, $ha);
1444 undef($wait_for_input);
1445 if ($wait_for_debug) {
1446 print STDERR "wait_for(",join(",", @_),")\n";
1448 $ha = &callers_package($_[0]);
1449 if ($wait_for_debug) {
1450 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1455 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1456 " \$wait_for_input .= \$c;\n";
1457 if ($wait_for_debug) {
1458 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1460 for($i=1; $i<@_; $i++) {
1461 $sw = $i>1 ? "elsif" : "if";
1462 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1465 " if (defined(\$hit)) {\n".
1466 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1472 &error("wait_for error : $@\n");
1477 =head2 fast_wait_for(handle, string, string, ...)
1479 This function behaves very similar to wait_for (documented above), but instead
1480 of taking regular expressions as parameters, it takes strings. As soon as the
1481 input contains one of them, it will return the index of the matching string.
1482 If the input ends before any match, it returns -1.
1487 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1488 for($i=1; $i<@_; $i++) {
1489 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1493 if (($c = getc($ha)) eq "") {
1494 &error("fast_wait_for read error : $!");
1497 if (length($inp) > $maxlen) {
1498 $inp = substr($inp, length($inp)-$maxlen);
1500 $inpl = length($inp);
1501 for($i=1; $i<@_; $i++) {
1502 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1509 =head2 has_command(command)
1511 Returns the full path to the executable if some command is in the path, or
1512 undef if not found. If the given command is already an absolute path and
1513 exists, then the same path will be returned.
1518 if (!$_[0]) { return undef; }
1519 if (exists($main::has_command_cache{$_[0]})) {
1520 return $main::has_command_cache{$_[0]};
1523 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1524 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1525 # Absolute path given - just use it
1526 my $t = &translate_filename($_[0]);
1527 $rv = (-x $t && !-d _) ? $_[0] : undef;
1530 # Check each directory in the path
1532 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1533 next if ($donedir{$d}++);
1534 $d =~ s/$slash$// if ($d ne $slash);
1535 my $t = &translate_filename("$d/$_[0]");
1536 if (-x $t && !-d _) {
1537 $rv = $d.$slash.$_[0];
1540 if ($gconfig{'os_type'} eq 'windows') {
1541 foreach my $sfx (".exe", ".com", ".bat") {
1542 my $t = &translate_filename("$d/$_[0]").$sfx;
1543 if (-r $t && !-d _) {
1544 $rv = $d.$slash.$_[0].$sfx;
1551 $main::has_command_cache{$_[0]} = $rv;
1555 =head2 make_date(seconds, [date-only], [fmt])
1557 Converts a Unix date/time in seconds to a human-readable form, by default
1558 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1560 =item seconds - Unix time is seconds to convert.
1562 =item date-only - If set to 1, exclude the time from the returned string.
1564 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1569 my ($secs, $only, $fmt) = @_;
1570 my @tm = localtime($secs);
1573 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1575 if ($fmt eq 'dd/mon/yyyy') {
1576 $date = sprintf "%2.2d/%s/%4.4d",
1577 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1579 elsif ($fmt eq 'dd/mm/yyyy') {
1580 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1582 elsif ($fmt eq 'mm/dd/yyyy') {
1583 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1585 elsif ($fmt eq 'yyyy/mm/dd') {
1586 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1589 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1594 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1596 Return HTML for a button that pops up a file chooser when clicked, and places
1597 the selected filename into another HTML field. The parameters are :
1599 =item input - Name of the form field to store the filename in.
1601 =item type - 0 for file or directory chooser, or 1 for directory only.
1603 =item form - Index of the form containing the button.
1605 =item chroot - If set to 1, the chooser will be limited to this directory.
1607 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1610 sub file_chooser_button
1612 return &theme_file_chooser_button(@_)
1613 if (defined(&theme_file_chooser_button));
1614 my $form = defined($_[2]) ? $_[2] : 0;
1615 my $chroot = defined($_[3]) ? $_[3] : "/";
1616 my $add = int($_[4]);
1617 my ($w, $h) = (400, 300);
1618 if ($gconfig{'db_sizefile'}) {
1619 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1621 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";
1624 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1626 Returns HTML for a button that will popup a chooser window of some kind. The
1629 =item url - Base URL of the popup window's contents
1631 =item width - Width of the window in pixels
1633 =item height - Height in pixels
1635 =item scrollbars - Set to 1 if the window should have scrollbars
1637 The field-mappings parameter is an array ref of array refs containing
1639 =item - Attribute to assign field to in the popup window
1641 =item - Form field name
1643 =item - CGI parameter to URL for value, if any
1646 sub popup_window_button
1648 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1649 my ($url, $w, $h, $scroll, $fields) = @_;
1650 my $scrollyn = $scroll ? "yes" : "no";
1651 my $rv = "<input type=button onClick='";
1652 foreach my $m (@$fields) {
1653 $rv .= "$m->[0] = form.$m->[1]; ";
1655 my $sep = $url =~ /\?/ ? "&" : "?";
1656 $rv .= "chooser = window.open(\"$url\"";
1657 foreach my $m (@$fields) {
1659 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1663 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1664 foreach my $m (@$fields) {
1665 $rv .= "chooser.$m->[0] = $m->[0]; ";
1666 $rv .= "window.$m->[0] = $m->[0]; ";
1668 $rv .= "' value=\"...\">";
1672 =head2 read_acl(&user-module-hash, &user-list-hash)
1674 Reads the Webmin acl file into the given hash references. The first is indexed
1675 by a combined key of username,module , with the value being set to 1 when
1676 the user has access to that module. The second is indexed by username, with
1677 the value being an array ref of allowed modules.
1679 This function is deprecated in favour of foreign_available, which performs a
1680 more comprehensive check of module availability.
1685 if (!defined(%main::acl_hash_cache)) {
1687 open(ACL, &acl_filename());
1689 if (/^([^:]+):\s*(.*)/) {
1691 my @mods = split(/\s+/, $2);
1692 foreach my $m (@mods) {
1693 $main::acl_hash_cache{$user,$m}++;
1695 $main::acl_array_cache{$user} = \@mods;
1700 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1701 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1706 Returns the file containing the webmin ACL, which is usually
1707 /etc/webmin/webmin.acl.
1712 return "$config_directory/webmin.acl";
1717 Does nothing, but kept around for compatability.
1724 =head2 get_miniserv_config(&hash)
1726 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1727 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1731 sub get_miniserv_config
1733 return &read_file_cached(
1734 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1737 =head2 put_miniserv_config(&hash)
1739 Writes out the Webmin webserver configuration file from the contents of
1740 the given hash ref. This should be initially populated by get_miniserv_config,
1743 get_miniserv_config(\%miniserv);
1744 $miniserv{'port'} = 10005;
1745 put_miniserv_config(\%miniserv);
1749 sub put_miniserv_config
1751 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1755 =head2 restart_miniserv([nowait])
1757 Kill the old miniserv process and re-start it, then optionally waits for
1758 it to restart. This will apply all configuration settings.
1761 sub restart_miniserv
1764 return undef if (&is_readonly_mode());
1766 &get_miniserv_config(\%miniserv) || return;
1769 if ($gconfig{'os_type'} ne 'windows') {
1770 # On Unix systems, we can restart with a signal
1771 my ($pid, $addr, $i);
1772 $miniserv{'inetd'} && return;
1773 my @oldst = stat($miniserv{'pidfile'});
1774 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1777 if (!$pid) { &error("Invalid PID file"); }
1779 # Just signal miniserv to restart
1780 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1782 # Wait till new PID is written, indicating a restart
1783 for($i=0; $i<60; $i++) {
1785 my @newst = stat($miniserv{'pidfile'});
1786 last if ($newst[9] != $oldst[9]);
1788 $i < 60 || &error("Webmin server did not write new PID file");
1790 ## Totally kill the process and re-run it
1791 #$SIG{'TERM'} = 'IGNORE';
1792 #&kill_logged('TERM', $pid);
1793 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1796 # On Windows, we need to use the flag file
1797 open(TOUCH, ">$miniserv{'restartflag'}");
1802 # wait for miniserv to come back up
1803 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1805 for($i=0; $i<20; $i++) {
1807 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1808 my $rv = connect(STEST,
1809 pack_sockaddr_in($miniserv{'port'}, $addr));
1811 last if ($rv && ++$ok >= 2);
1813 $i < 20 || &error("Failed to restart Webmin server!");
1817 =head2 reload_miniserv
1819 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1820 configuration files. Not all changes will be applied though, such as the
1821 IP addresses and ports to accept connections on.
1826 return undef if (&is_readonly_mode());
1828 &get_miniserv_config(\%miniserv) || return;
1830 if ($gconfig{'os_type'} ne 'windows') {
1831 # Send a USR1 signal to re-read the config
1832 my ($pid, $addr, $i);
1833 $miniserv{'inetd'} && return;
1834 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1837 if (!$pid) { &error("Invalid PID file"); }
1838 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1840 # Make sure this didn't kill Webmin!
1842 if (!kill(0, $pid)) {
1843 print STDERR "USR1 signal killed Webmin - restarting\n";
1844 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1848 # On Windows, we need to use the flag file
1849 open(TOUCH, ">$miniserv{'reloadflag'}");
1854 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1856 Returns 1 if some module is supported on the current operating system, or the
1857 OS supplies as parameters. The parameters are :
1859 =item minfo - A hash ref of module information, as returned by get_module_info
1861 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1863 =item os-version - The Webmin OS version to use, such as 13.0
1865 =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.
1868 sub check_os_support
1870 my $oss = $_[0]->{'os_support'};
1871 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1872 # May provide usable API
1873 $oss .= " ".$_[0]->{'api_os_support'};
1875 if ($_[0]->{'nozone'} && &running_in_zone()) {
1876 # Not supported in a Solaris Zone
1879 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1880 # Not supported in a Linux Vserver
1883 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1884 # Not supported in an OpenVZ container
1887 return 1 if (!$oss || $oss eq '*');
1888 my $osver = $_[2] || $gconfig{'os_version'};
1889 my $ostype = $_[1] || $gconfig{'os_type'};
1892 my ($os, $ver, $codes);
1893 my ($neg) = ($oss =~ s/^!//); # starts with !
1894 $anyneg++ if ($neg);
1895 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1897 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1899 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1901 $os = $1; $ver = $2; $oss = $3;
1903 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1905 $os = $1; $codes = $2; $oss = $3;
1907 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1909 $codes = $1; $oss = $2;
1911 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1913 $os = $1; $oss = $2;
1916 next if ($os && !($os eq $ostype ||
1917 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1918 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1919 next if ($osver < $1 || $osver > $2);
1921 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1922 next if ($osver < $1);
1924 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1925 next if ($osver > $1);
1928 next if ($ver ne $osver);
1930 next if ($codes && !eval $codes);
1936 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1938 Downloads data from a HTTP url to a local file or string. The parameters are :
1940 =item host - The hostname part of the URL, such as www.google.com
1942 =item port - The HTTP port number, such as 80
1944 =item page - The filename part of the URL, like /index.html
1946 =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.
1948 =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.
1950 =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.
1952 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
1954 =item user - If set, HTTP authentication is done with this username.
1956 =item pass - The HTTP password to use with the username above.
1958 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
1960 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
1962 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
1964 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
1969 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
1970 $timeout, $osdn, $nocache, $headers) = @_;
1971 if ($gconfig{'debug_what_net'}) {
1972 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
1973 ($user ? " user=$user pass=$pass" : "").
1974 (ref($dest) ? "" : " dest=$dest"));
1977 # Convert OSDN URL first
1978 my $prot = $ssl ? "https://" : "http://";
1979 my $portstr = $ssl && $port == 443 ||
1980 !$ssl && $port == 80 ? "" : ":$port";
1981 ($host, $port, $page, $ssl) = &parse_http_url(
1982 &convert_osdn_url($prot.$host.$portstr.$page));
1985 # Check if we already have cached the URL
1986 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
1987 my $cfile = &check_in_http_cache($url);
1988 if ($cfile && !$nocache) {
1989 # Yes! Copy to dest file or variable
1990 &$cbfunc(6, $url) if ($cbfunc);
1992 &open_readfile(CACHEFILE, $cfile);
1994 $$dest = <CACHEFILE>;
1998 ©_source_dest($cfile, $dest);
2005 push(@headers, [ "Host", $host ]);
2006 push(@headers, [ "User-agent", "Webmin" ]);
2008 my $auth = &encode_base64("$user:$pass");
2009 $auth =~ tr/\r\n//d;
2010 push(@headers, [ "Authorization", "Basic $auth" ]);
2012 foreach my $hname (keys %$headers) {
2013 push(@headers, [ $hname, $headers->{$hname} ]);
2016 # Actually download it
2017 $main::download_timed_out = undef;
2018 local $SIG{ALRM} = \&download_timeout;
2019 alarm($timeout || 60);
2020 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2022 $h = $main::download_timed_out if ($main::download_timed_out);
2024 if ($error) { $$error = $h; return; }
2025 else { &error($h); }
2027 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2029 if ((!$error || !$$error) && !$nocache) {
2030 &write_to_http_cache($url, $dest);
2034 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl])
2036 Do a HTTP download, after the headers have been sent. For internal use only,
2037 typically called by http_download.
2040 sub complete_http_download
2042 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2048 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2049 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2051 if ($_[2]) { ${$_[2]} = $line; return; }
2052 else { &error("Download failed : $line"); }
2055 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2058 $line = &read_http_connection($_[0]);
2059 $line =~ tr/\r\n//d;
2060 $line =~ /^(\S+):\s+(.*)$/ || last;
2061 $header{lc($1)} = $2;
2062 push(@headers, [ lc($1), $2 ]);
2065 if ($main::download_timed_out) {
2066 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2067 else { &error($main::download_timed_out); }
2069 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2070 if ($rcode >= 300 && $rcode < 400) {
2071 # follow the redirect
2072 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2073 my ($host, $port, $page, $ssl);
2074 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2075 $ssl = $1 eq 'https' ? 1 : 0;
2076 $host = $2; $port = $3; $page = $4 || "/";
2078 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2079 $ssl = $1 eq 'https' ? 1 : 0;
2080 $host = $2; $port = 80; $page = $3 || "/";
2082 elsif ($header{'location'} =~ /^\// && $_[5]) {
2083 # Relative to same server
2087 $page = $header{'location'};
2089 elsif ($header{'location'}) {
2090 # Assume relative to same dir .. not handled
2091 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2092 else { &error("Invalid Location header $header{'location'}"); }
2095 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2096 else { &error("Missing Location header"); }
2099 ($page, $params) = split(/\?/, $page);
2101 $page .= "?".$params if (defined($params));
2102 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2103 undef, undef, undef, $_[4], 0, $_[7]);
2108 # Append to a variable
2109 while(defined($buf = &read_http_connection($_[0], 1024))) {
2111 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2117 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2118 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2119 else { &error("Failed to write to $_[1] : $!"); }
2121 binmode(PFILE); # For windows
2122 while(defined($buf = &read_http_connection($_[0], 1024))) {
2123 &print_tempfile(PFILE, $buf);
2124 $got += length($buf);
2125 &$cbfunc(3, $got) if ($cbfunc);
2127 &close_tempfile(PFILE);
2128 if ($header{'content-length'} &&
2129 $got != $header{'content-length'}) {
2130 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2131 else { &error("Download incomplete"); }
2134 &$cbfunc(4) if ($cbfunc);
2136 &close_http_connection($_[0]);
2140 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2142 Download data from an FTP site to a local file. The parameters are :
2144 =item host - FTP server hostname
2146 =item file - File on the FTP server to download
2148 =item destfile - File on the Webmin system to download data to
2150 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2152 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2154 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2156 =item pass - Password for the username above.
2158 =item port - FTP server port number, which defaults to 21 if not set.
2163 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2165 if ($gconfig{'debug_what_net'}) {
2166 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2167 ($user ? " user=$user pass=$pass" : "").
2168 (ref($dest) ? "" : " dest=$dest"));
2172 if (&is_readonly_mode()) {
2173 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2175 else { &error("FTP connections not allowed in readonly mode"); }
2178 # Check if we already have cached the URL
2179 my $url = "ftp://".$host.$file;
2180 my $cfile = &check_in_http_cache($url);
2182 # Yes! Copy to dest file or variable
2183 &$cbfunc(6, $url) if ($cbfunc);
2185 &open_readfile(CACHEFILE, $cfile);
2187 $$dest = <CACHEFILE>;
2191 ©_source_dest($cfile, $dest);
2196 # Actually download it
2197 $main::download_timed_out = undef;
2198 local $SIG{ALRM} = \&download_timeout;
2201 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2202 # download through http-style proxy
2204 if (&open_socket($1, $2, "SOCK", \$error)) {
2206 if ($main::download_timed_out) {
2208 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2209 else { &error($main::download_timed_out); }
2211 my $esc = $_[1]; $esc =~ s/ /%20/g;
2212 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2213 my $portstr = $port == 21 ? "" : ":$port";
2214 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2215 print SOCK "User-agent: Webmin\r\n";
2216 if ($gconfig{'proxy_user'}) {
2217 my $auth = &encode_base64(
2218 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2219 $auth =~ tr/\r\n//d;
2220 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2223 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2226 elsif (!$gconfig{'proxy_fallback'}) {
2228 if ($error) { $$error = $main::download_timed_out; return 0; }
2229 else { &error($main::download_timed_out); }
2234 # connect to host and login with real FTP protocol
2235 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2237 if ($main::download_timed_out) {
2238 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2239 else { &error($main::download_timed_out); }
2241 &ftp_command("", 2, $_[3]) || return 0;
2243 # Login as supplied user
2244 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2246 if (int($urv[1]/100) == 3) {
2247 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2251 # Login as anonymous
2252 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2254 if (int($urv[1]/100) == 3) {
2255 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2259 &$cbfunc(1, 0) if ($cbfunc);
2262 # get the file size and tell the callback
2263 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2264 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2265 defined($size) || return 0;
2267 &$cbfunc(2, int($size));
2271 my $pasv = &ftp_command("PASV", 2, $_[3]);
2272 defined($pasv) || return 0;
2273 $pasv =~ /\(([0-9,]+)\)/;
2274 @n = split(/,/ , $1);
2275 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2276 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2277 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2281 &open_tempfile(PFILE, ">$_[2]", 1);
2282 while(read(CON, $buf, 1024) > 0) {
2283 &print_tempfile(PFILE, $buf);
2284 $got += length($buf);
2285 &$cbfunc(3, $got) if ($cbfunc);
2287 &close_tempfile(PFILE);
2289 if ($got != $size) {
2290 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2291 else { &error("Download incomplete"); }
2293 &$cbfunc(4) if ($cbfunc);
2295 &ftp_command("", 2, $_[3]) || return 0;
2299 &ftp_command("QUIT", 2, $_[3]) || return 0;
2303 &write_to_http_cache($url, $dest);
2307 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2309 Upload data from a local file to an FTP site. The parameters are :
2311 =item host - FTP server hostname
2313 =item file - File on the FTP server to write to
2315 =item srcfile - File on the Webmin system to upload data from
2317 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2319 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2321 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2323 =item pass - Password for the username above.
2325 =item port - FTP server port number, which defaults to 21 if not set.
2332 if (&is_readonly_mode()) {
2333 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2335 else { &error("FTP connections not allowed in readonly mode"); }
2338 $main::download_timed_out = undef;
2339 local $SIG{ALRM} = \&download_timeout;
2342 # connect to host and login
2343 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2345 if ($main::download_timed_out) {
2346 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2347 else { &error($main::download_timed_out); }
2349 &ftp_command("", 2, $_[3]) || return 0;
2351 # Login as supplied user
2352 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2354 if (int($urv[1]/100) == 3) {
2355 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2359 # Login as anonymous
2360 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2362 if (int($urv[1]/100) == 3) {
2363 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2367 &$cbfunc(1, 0) if ($cbfunc);
2369 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2371 # get the file size and tell the callback
2372 my @st = stat($_[2]);
2374 &$cbfunc(2, $st[7]);
2378 my $pasv = &ftp_command("PASV", 2, $_[3]);
2379 defined($pasv) || return 0;
2380 $pasv =~ /\(([0-9,]+)\)/;
2381 @n = split(/,/ , $1);
2382 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2383 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2388 while(read(PFILE, $buf, 1024) > 0) {
2390 $got += length($buf);
2391 &$cbfunc(3, $got) if ($cbfunc);
2395 if ($got != $st[7]) {
2396 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2397 else { &error("Upload incomplete"); }
2399 &$cbfunc(4) if ($cbfunc);
2402 &ftp_command("", 2, $_[3]) || return 0;
2403 &ftp_command("QUIT", 2, $_[3]) || return 0;
2409 =head2 no_proxy(host)
2411 Checks if some host is on the no proxy list. For internal use by the
2412 http_download and ftp_download functions.
2417 my $ip = &to_ipaddress($_[0]);
2418 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2419 return 1 if ($_[0] =~ /\Q$n\E/ ||
2425 =head2 open_socket(host, port, handle, [&error])
2427 Open a TCP connection to some host and port, using a file handle. The
2430 =item host - Hostname or IP address to connect to.
2432 =item port - TCP port number.
2434 =item handle - A file handle name to use for the connection.
2436 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2441 my ($host, $port, $fh, $err) = @_;
2442 $fh = &callers_package($fh);
2444 if ($gconfig{'debug_what_net'}) {
2445 &webmin_debug_log('TCP', "host=$host port=$port");
2447 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2448 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2449 else { &error("Failed to create socket : $!"); }
2452 if (!($addr = inet_aton($host))) {
2453 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2454 else { &error("Failed to lookup IP address for $host"); }
2456 if ($gconfig{'bind_proxy'}) {
2457 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2458 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2459 else { &error("Failed to bind to source address : $!"); }
2462 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2463 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2464 else { &error("Failed to connect to $host:$port : $!"); }
2466 my $old = select($fh); $| =1; select($old);
2470 =head2 download_timeout
2472 Called when a download times out. For internal use only.
2475 sub download_timeout
2477 $main::download_timed_out = "Download timed out";
2480 =head2 ftp_command(command, expected, [&error], [filehandle])
2482 Send an FTP command, and die if the reply is not what was expected. Mainly
2483 for internal use by the ftp_download and ftp_upload functions.
2488 my ($cmd, $expect, $err, $fh) = @_;
2490 $fh = &callers_package($fh);
2493 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2495 print $fh "$cmd\r\n";
2498 if (!($line = <$fh>)) {
2500 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2501 else { &error("Failed to read reply to $what"); }
2503 $line =~ /^(...)(.)(.*)$/;
2506 foreach my $c (@$expect) {
2507 $found++ if (int($1/100) == $c);
2511 $found++ if (int($1/100) == $_[1]);
2515 if ($err) { $$err = "$what failed : $3"; return undef; }
2516 else { &error("$what failed : $3"); }
2521 # Need to skip extra stuff..
2523 if (!($line = <$fh>)) {
2525 if ($$err) { $$err = "Failed to read reply to $what";
2527 else { &error("Failed to read reply to $what"); }
2529 $line =~ /^(....)(.*)$/; $reply .= $2;
2530 if ($1 eq "$rcode ") { last; }
2534 return wantarray ? ($reply, $rcode) : $reply;
2537 =head2 to_ipaddress(hostname)
2539 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2540 it cannot be resolved.
2545 if (&check_ipaddress($_[0])) {
2549 my $hn = gethostbyname($_[0]);
2550 return undef if (!$hn);
2551 local @ip = unpack("CCCC", $hn);
2552 return join("." , @ip);
2556 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2558 Renders a 4-column table of icons. The useful parameters are :
2560 =item links - An array ref of link destination URLs for the icons.
2562 =item titles - An array ref of titles to appear under the icons.
2564 =item icons - An array ref of URLs for icon images.
2566 =item columns - Number of columns to layout the icons with. Defaults to 4.
2571 &load_theme_library();
2572 if (defined(&theme_icons_table)) {
2573 &theme_icons_table(@_);
2577 my $cols = $_[3] ? $_[3] : 4;
2578 my $per = int(100.0 / $cols);
2579 print "<table class='icons_table' width=100% cellpadding=5>\n";
2580 for(my $i=0; $i<@{$_[0]}; $i++) {
2581 if ($i%$cols == 0) { print "<tr>\n"; }
2582 print "<td width=$per% align=center valign=top>\n";
2583 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2584 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2585 $_[7]->[$i], $_[8]->[$i]);
2587 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2589 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2590 print "</tr>\n" if ($need_tr);
2594 =head2 replace_file_line(file, line, [newline]*)
2596 Replaces one line in some file with 0 or more new lines. The parameters are :
2598 =item file - Full path to some file, like /etc/hosts.
2600 =item line - Line number to replace, starting from 0.
2602 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2605 sub replace_file_line
2608 my $realfile = &translate_filename($_[0]);
2609 open(FILE, $realfile);
2612 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2613 else { splice(@lines, $_[1], 1); }
2614 &open_tempfile(FILE, ">$realfile");
2615 &print_tempfile(FILE, @lines);
2616 &close_tempfile(FILE);
2619 =head2 read_file_lines(file, [readonly])
2621 Returns a reference to an array containing the lines from some file. This
2622 array can be modified, and will be written out when flush_file_lines()
2623 is called. The parameters are :
2625 =item file - Full path to the file to read.
2627 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2631 $lref = read_file_lines("/etc/hosts");
2632 push(@$lref, "127.0.0.1 localhost");
2633 flush_file_lines("/etc/hosts");
2639 my ($package, $filename, $line) = caller;
2640 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2642 my $realfile = &translate_filename($_[0]);
2643 if (!$main::file_cache{$realfile}) {
2646 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2647 open(READFILE, $realfile);
2650 $eol = /\r\n$/ ? "\r\n" : "\n";
2656 $main::file_cache{$realfile} = \@lines;
2657 $main::file_cache_noflush{$realfile} = $_[1];
2658 $main::file_cache_eol{$realfile} = $eol || "\n";
2661 # Make read-write if currently readonly
2663 $main::file_cache_noflush{$realfile} = 0;
2666 return $main::file_cache{$realfile};
2669 =head2 flush_file_lines([file], [eol])
2671 Write out to a file previously read by read_file_lines to disk (except
2672 for those marked readonly). The parameters are :
2674 =item file - The file to flush out.
2676 =item eof - End-of-line character for each line. Defaults to \n.
2679 sub flush_file_lines
2683 local $trans = &translate_filename($_[0]);
2684 $main::file_cache{$trans} ||
2685 &error("flush_file_lines called on non-loaded file $trans");
2686 push(@files, $trans);
2689 @files = ( keys %main::file_cache );
2691 foreach my $f (@files) {
2692 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2693 if (!$main::file_cache_noflush{$f}) {
2694 no warnings; # XXX Bareword file handles should go away
2695 &open_tempfile(FLUSHFILE, ">$f");
2696 foreach my $line (@{$main::file_cache{$f}}) {
2697 (print FLUSHFILE $line,$eol) ||
2698 &error(&text("efilewrite", $f, $!));
2700 &close_tempfile(FLUSHFILE);
2702 delete($main::file_cache{$f});
2703 delete($main::file_cache_noflush{$f});
2707 =head2 unflush_file_lines(file)
2709 Clear the internal cache of some given file, previously read by read_file_lines.
2712 sub unflush_file_lines
2714 my $realfile = &translate_filename($_[0]);
2715 delete($main::file_cache{$realfile});
2716 delete($main::file_cache_noflush{$realfile});
2719 =head2 unix_user_input(fieldname, user, [form])
2721 Returns HTML for an input to select a Unix user. By default this is a text
2722 box with a user popup button next to it.
2727 if (defined(&theme_unix_user_input)) {
2728 return &theme_unix_user_input(@_);
2730 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2731 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2734 =head2 unix_group_input(fieldname, user, [form])
2736 Returns HTML for an input to select a Unix group. By default this is a text
2737 box with a group popup button next to it.
2740 sub unix_group_input
2742 if (defined(&theme_unix_group_input)) {
2743 return &theme_unix_group_input(@_);
2745 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2746 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2749 =head2 hlink(text, page, [module], [width], [height])
2751 Returns HTML for a link that when clicked on pops up a window for a Webmin
2752 help page. The parameters are :
2754 =item text - Text for the link.
2756 =item page - Help page code, such as 'intro'.
2758 =item module - Module the help page is in. Defaults to the current module.
2760 =item width - Width of the help popup window. Defaults to 600 pixels.
2762 =item height - Height of the help popup window. Defaults to 400 pixels.
2764 The actual help pages are in each module's help sub-directory, in files with
2770 if (defined(&theme_hlink)) {
2771 return &theme_hlink(@_);
2773 my $mod = $_[2] ? $_[2] : &get_module_name();
2774 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2775 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2776 return "<a onClick='window.open(\"$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>";
2779 =head2 user_chooser_button(field, multiple, [form])
2781 Returns HTML for a javascript button for choosing a Unix user or users.
2782 The parameters are :
2784 =item field - Name of the HTML field to place the username into.
2786 =item multiple - Set to 1 if multiple users can be selected.
2788 =item form - Index of the form on the page.
2791 sub user_chooser_button
2793 return undef if (!&supports_users());
2794 return &theme_user_chooser_button(@_)
2795 if (defined(&theme_user_chooser_button));
2796 my $form = defined($_[2]) ? $_[2] : 0;
2797 my $w = $_[1] ? 500 : 300;
2799 if ($_[1] && $gconfig{'db_sizeusers'}) {
2800 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2802 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2803 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2805 return "<input type=button onClick='ifield = form.$_[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";
2808 =head2 group_chooser_button(field, multiple, [form])
2810 Returns HTML for a javascript button for choosing a Unix group or groups
2811 The parameters are :
2813 =item field - Name of the HTML field to place the group name into.
2815 =item multiple - Set to 1 if multiple groups can be selected.
2817 =item form - Index of the form on the page.
2820 sub group_chooser_button
2822 return undef if (!&supports_users());
2823 return &theme_group_chooser_button(@_)
2824 if (defined(&theme_group_chooser_button));
2825 my $form = defined($_[2]) ? $_[2] : 0;
2826 my $w = $_[1] ? 500 : 300;
2828 if ($_[1] && $gconfig{'db_sizeusers'}) {
2829 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2831 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2832 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2834 return "<input type=button onClick='ifield = form.$_[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";
2837 =head2 foreign_check(module, [api-only])
2839 Checks if some other module exists and is supported on this OS. The parameters
2842 =item module - Name of the module to check.
2844 =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.
2849 my ($mod, $api) = @_;
2851 my $mdir = &module_root_directory($mod);
2852 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2853 return &check_os_support(\%minfo, undef, undef, $api);
2856 =head2 foreign_exists(module)
2858 Checks if some other module exists. The module parameter is the short module
2864 my $mdir = &module_root_directory($_[0]);
2865 return -r "$mdir/module.info";
2868 =head2 foreign_available(module)
2870 Returns 1 if some module is installed, and acessible to the current user. The
2871 module parameter is the module directory name.
2874 sub foreign_available
2876 return 0 if (!&foreign_check($_[0]) &&
2877 !$gconfig{'available_even_if_no_support'});
2878 my %foreign_module_info = &get_module_info($_[0]);
2880 # Check list of allowed modules
2882 &read_acl(\%acl, undef);
2883 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2884 !$acl{$base_remote_user,'*'});
2886 # Check for usermod restrictions
2887 my @usermods = &list_usermods();
2888 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2890 if (&get_product_name() eq "webmin") {
2891 # Check if the user has any RBAC privileges in this module
2892 if (&supports_rbac($_[0]) &&
2893 &use_rbac_module_acl(undef, $_[0])) {
2894 # RBAC is enabled for this user and module - check if he
2896 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2897 return 0 if (!$rbacs);
2899 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2900 # If denying access to modules not specifically allowed by
2901 # RBAC, then prevent access
2906 # Check readonly support
2907 if (&is_readonly_mode()) {
2908 return 0 if (!$foreign_module_info{'readonly'});
2911 # Check if theme vetos
2912 if (defined(&theme_foreign_available)) {
2913 return 0 if (!&theme_foreign_available($_[0]));
2916 # Check if licence module vetos
2917 if ($main::licence_module) {
2918 return 0 if (!&foreign_call($main::licence_module,
2919 "check_module_licence", $_[0]));
2925 =head2 foreign_require(module, [file], [package])
2927 Brings in functions from another module, and places them in the Perl namespace
2928 with the same name as the module. The parameters are :
2930 =item module - The source module's directory name, like sendmail.
2932 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2934 =item package - Perl package to place the module's functions and global variables in.
2936 If the original module name contains dashes, they will be replaced with _ in
2942 my ($mod, $file, $pkg) = @_;
2943 $pkg ||= $mod || "global";
2944 $pkg =~ s/[^A-Za-z0-9]/_/g;
2947 push(@files, $file);
2951 my %minfo = &get_module_info($mod);
2952 if ($minfo{'library'}) {
2953 @files = split(/\s+/, $minfo{'library'});
2956 @files = ( $mod."-lib.pl" );
2959 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
2960 return 1 if (!@files);
2961 foreach my $f (@files) {
2962 $main::done_foreign_require{$pkg,$f}++;
2965 my $mdir = &module_root_directory($mod);
2966 @INC = &unique($mdir, @INC);
2967 -d $mdir || &error("Module $mod does not exist");
2968 if (!&get_module_name() && $mod) {
2971 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
2972 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
2973 my $code = "package $pkg; ".
2974 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
2975 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
2976 foreach my $f (@files) {
2977 $code .= "do '$mdir/$f' || die \$@; ";
2980 if (defined($old_fmn)) {
2981 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
2984 delete($ENV{'FOREIGN_MODULE_NAME'});
2986 if (defined($old_frd)) {
2987 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
2990 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
2993 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
2997 =head2 foreign_call(module, function, [arg]*)
2999 Call a function in another module. The module parameter is the target module
3000 directory name, function is the perl sub to call, and the remaining parameters
3001 are the arguments. However, unless you need to call a function whose name
3002 is dynamic, it is better to use Perl's cross-module function call syntax
3003 like module::function(args).
3008 my $pkg = $_[0] || "global";
3009 $pkg =~ s/[^A-Za-z0-9]/_/g;
3010 my @args = @_[2 .. @_-1];
3011 $main::foreign_args = \@args;
3012 my @rv = eval <<EOF;
3014 &$_[1](\@{\$main::foreign_args});
3016 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3017 return wantarray ? @rv : $rv[0];
3020 =head2 foreign_config(module, [user-config])
3022 Get the configuration from another module, and return it as a hash. If the
3023 user-config parameter is set to 1, returns the Usermin user-level preferences
3024 for the current user instead.
3029 my ($mod, $uc) = @_;
3032 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3033 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3034 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3037 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3042 =head2 foreign_installed(module, mode)
3044 Checks if the server for some module is installed, and possibly also checks
3045 if the module has been configured by Webmin.
3046 For mode 1, returns 2 if the server is installed and configured for use by
3047 Webmin, 1 if installed but not configured, or 0 otherwise.
3048 For mode 0, returns 1 if installed, 0 if not.
3049 If the module does not provide an install_check.pl script, assumes that
3050 the server is installed.
3053 sub foreign_installed
3055 my ($mod, $configured) = @_;
3056 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3058 return $main::foreign_installed_cache{$mod,$configured};
3062 if (!&foreign_check($mod)) {
3067 my $mdir = &module_root_directory($mod);
3068 if (!-r "$mdir/install_check.pl") {
3069 # Not known, assume OK
3070 $rv = $configured ? 2 : 1;
3073 # Call function to check
3074 &foreign_require($mod, "install_check.pl");
3075 $rv = &foreign_call($mod, "is_installed", $configured);
3078 $main::foreign_installed_cache{$mod,$configured} = $rv;
3083 =head2 foreign_defined(module, function)
3085 Returns 1 if some function is defined in another module. In general, it is
3086 simpler to use the syntax &defined(module::function) instead.
3092 $pkg =~ s/[^A-Za-z0-9]/_/g;
3093 my $func = "${pkg}::$_[1]";
3094 return defined(&$func);
3097 =head2 get_system_hostname([short])
3099 Returns the hostname of this system. If the short parameter is set to 1,
3100 then the domain name is not prepended - otherwise, Webmin will attempt to get
3101 the fully qualified hostname, like foo.example.com.
3104 sub get_system_hostname
3107 if (!$main::get_system_hostname[$m]) {
3108 if ($gconfig{'os_type'} ne 'windows') {
3109 # Try some common Linux hostname files first
3111 if ($gconfig{'os_type'} eq 'redhat-linux') {
3113 &read_env_file("/etc/sysconfig/network", \%nc);
3114 if ($nc{'HOSTNAME'}) {
3115 $fromfile = $nc{'HOSTNAME'};
3118 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3119 my $hn = &read_file_contents("/etc/hostname");
3125 elsif ($gconfig{'os_type'} eq 'open-linux') {
3126 my $hn = &read_file_contents("/etc/HOSTNAME");
3132 elsif ($gconfig{'os_type'} eq 'solaris') {
3133 my $hn = &read_file_contents("/etc/nodename");
3140 # If we found a hostname, use it if value
3141 if ($fromfile && ($m || $fromfile =~ /\./)) {
3143 $fromfile =~ s/\..*$//;
3145 $main::get_system_hostname[$m] = $fromfile;
3149 # Can use hostname command on Unix
3150 &execute_command("hostname", undef,
3151 \$main::get_system_hostname[$m], undef, 0, 1);
3152 chop($main::get_system_hostname[$m]);
3154 eval "use Sys::Hostname";
3156 $main::get_system_hostname[$m] = eval "hostname()";
3158 if ($@ || !$main::get_system_hostname[$m]) {
3159 $main::get_system_hostname[$m] = "UNKNOWN";
3162 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3163 $gconfig{'os_type'} =~ /linux$/ &&
3164 !$gconfig{'no_hostname_f'} && !$_[0]) {
3165 # Try with -f flag to get fully qualified name
3167 my $ex = &execute_command("hostname -f", undef, \$flag,
3170 if ($ex || $flag eq "") {
3171 # -f not supported! We have probably set the
3172 # hostname to just '-f'. Fix the problem
3175 &execute_command("hostname ".
3176 quotemeta($main::get_system_hostname[$m]),
3177 undef, undef, undef, 0, 1);
3181 $main::get_system_hostname[$m] = $flag;
3186 # On Windows, try computername environment variable
3187 return $ENV{'computername'} if ($ENV{'computername'});
3188 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3190 # Fall back to net name command
3191 my $out = `net name 2>&1`;
3192 if ($out =~ /\-+\r?\n(\S+)/) {
3193 $main::get_system_hostname[$m] = $1;
3196 $main::get_system_hostname[$m] = "windows";
3200 return $main::get_system_hostname[$m];
3203 =head2 get_webmin_version
3205 Returns the version of Webmin currently being run, such as 1.450.
3208 sub get_webmin_version
3210 if (!$get_webmin_version) {
3211 open(VERSION, "$root_directory/version") || return 0;
3212 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3215 return $get_webmin_version;
3218 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3220 Returns a hash containing access control options for the given user and module.
3221 By default the current username and module name are used. If the no-rbac flag
3222 is given, the permissions will not be updated based on the user's RBAC role
3223 (as seen on Solaris). If the no-default flag is given, default permissions for
3224 the module will not be included.
3229 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3230 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3231 my $mdir = &module_root_directory($m);
3234 # Read default ACL first, to be overridden by per-user settings
3235 &read_file_cached("$mdir/defaultacl", \%rv);
3237 # If this isn't a master admin user, apply the negative permissions
3238 # so that he doesn't un-expectedly gain access to new features
3240 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3241 if ($gaccess{'negative'}) {
3242 &read_file_cached("$mdir/negativeacl", \%rv);
3246 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3247 # RBAC overrides exist for this user in this module
3248 my $rbac = &get_rbac_module_acl(
3249 defined($_[0]) ? $_[0] : $remote_user, $m);
3250 foreach my $r (keys %$rbac) {
3251 $rv{$r} = $rbac->{$r};
3254 elsif ($gconfig{"risk_$u"} && $m) {
3255 # ACL is defined by user's risk level
3256 my $rf = $gconfig{"risk_$u"}.'.risk';
3257 &read_file_cached("$mdir/$rf", \%rv);
3259 my $sf = $gconfig{"skill_$u"}.'.skill';
3260 &read_file_cached("$mdir/$sf", \%rv);
3263 # Use normal Webmin ACL, if a user is set
3264 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3265 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3266 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3269 if ($tconfig{'preload_functions'}) {
3270 &load_theme_library();
3272 if (defined(&theme_get_module_acl)) {
3273 %rv = &theme_get_module_acl($u, $m, \%rv);
3278 =head2 get_group_module_acl(group, [module])
3280 Returns the ACL for a Webmin group, in an optional module (which defaults to
3281 the current module).
3284 sub get_group_module_acl
3287 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3288 my $mdir = &module_root_directory($m);
3290 &read_file_cached("$mdir/defaultacl", \%rv);
3291 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3292 if (defined(&theme_get_module_acl)) {
3293 %rv = &theme_get_module_acl($g, $m, \%rv);
3298 =head2 save_module_acl(&acl, [user], [module])
3300 Updates the acl hash for some user and module. The parameters are :
3302 =item acl - Hash reference for the new access control options.
3304 =item user - User to update, defaulting to the current user.
3306 =item module - Module to update, defaulting to the caller.
3311 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3312 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3313 if (&foreign_check("acl")) {
3314 # Check if this user is a member of a group, and if he gets the
3315 # module from a group. If so, update its ACL as well
3316 &foreign_require("acl", "acl-lib.pl");
3318 foreach my $g (&acl::list_groups()) {
3319 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3320 &indexof($m, @{$g->{'modules'}}) >= 0) {
3326 &save_group_module_acl($_[0], $group->{'name'}, $m);
3329 if (!-d "$config_directory/$m") {
3330 mkdir("$config_directory/$m", 0755);
3332 &write_file("$config_directory/$m/$u.acl", $_[0]);
3335 =head2 save_group_module_acl(&acl, group, [module])
3337 Updates the acl hash for some group and module. The parameters are :
3339 =item acl - Hash reference for the new access control options.
3341 =item group - Group name to update.
3343 =item module - Module to update, defaulting to the caller.
3346 sub save_group_module_acl
3349 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3350 if (&foreign_check("acl")) {
3351 # Check if this group is a member of a group, and if it gets the
3352 # module from a group. If so, update the parent ACL as well
3353 &foreign_require("acl", "acl-lib.pl");
3355 foreach my $pg (&acl::list_groups()) {
3356 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3357 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3363 &save_group_module_acl($_[0], $group->{'name'}, $m);
3366 if (!-d "$config_directory/$m") {
3367 mkdir("$config_directory/$m", 0755);
3369 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3374 This function must be called by all Webmin CGI scripts, either directly or
3375 indirectly via a per-module lib.pl file. It performs a number of initialization
3376 and housekeeping tasks, such as working out the module name, checking that the
3377 current user has access to the module, and populating global variables. Some
3378 of the variables set include :
3380 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3382 =item $var_directory - Base logs directory, typically /var/webmin
3384 =item %config - Per-module configuration.
3386 =item %gconfig - Global configuration.
3388 =item $scriptname - Base name of the current perl script.
3390 =item $module_name - The name of the current module.
3392 =item $module_config_directory - The config directory for this module.
3394 =item $module_config_file - The config file for this module.
3396 =item $module_root_directory - This module's code directory.
3398 =item $webmin_logfile - The detailed logfile for webmin.
3400 =item $remote_user - The actual username used to login to webmin.
3402 =item $base_remote_user - The username whose permissions are in effect.
3404 =item $current_theme - The theme currently in use.
3406 =item $root_directory - The first root directory of this webmin install.
3408 =item @root_directories - All root directories for this webmin install.
3413 # Record first process ID that called this, so we know when it exited to clean
3415 $main::initial_process_id ||= $$;
3417 # Configuration and spool directories
3418 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3419 die "WEBMIN_CONFIG not set";
3421 $config_directory = $ENV{'WEBMIN_CONFIG'};
3422 if (!defined($ENV{'WEBMIN_VAR'})) {
3423 open(VARPATH, "$config_directory/var-path");
3424 chop($var_directory = <VARPATH>);
3428 $var_directory = $ENV{'WEBMIN_VAR'};
3430 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3431 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3433 if ($ENV{'SESSION_ID'}) {
3434 # Hide this variable from called programs, but keep it for internal use
3435 $main::session_id = $ENV{'SESSION_ID'};
3436 delete($ENV{'SESSION_ID'});
3438 if ($ENV{'REMOTE_PASS'}) {
3439 # Hide the password too
3440 $main::remote_pass = $ENV{'REMOTE_PASS'};
3441 delete($ENV{'REMOTE_PASS'});
3444 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3445 # Looks like we are running setuid, but the real UID hasn't been set.
3446 # Do so now, so that executed programs don't get confused
3451 # Read the webmin global config file. This contains the OS type and version,
3452 # OS specific configuration and global options such as proxy servers
3453 $config_file = "$config_directory/config";
3455 &read_file_cached($config_file, \%gconfig);
3456 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3457 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3459 # If debugging is enabled, open the debug log
3460 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3461 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3462 if ($gconfig{'debug_size'}) {
3463 my @st = stat($dlog);
3464 if ($st[7] > $gconfig{'debug_size'}) {
3465 rename($dlog, $dlog.".0");
3468 open(main::DEBUGLOG, ">>$dlog");
3469 $main::opened_debug_log = 1;
3471 if ($gconfig{'debug_what_start'}) {
3472 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3473 $main::debug_log_start_time = time();
3474 &webmin_debug_log("START", "script=$script_name");
3475 $main::debug_log_start_module = $module_name;
3479 # Set PATH and LD_LIBRARY_PATH
3480 if ($gconfig{'path'}) {
3481 if ($gconfig{'syspath'}) {
3483 $ENV{'PATH'} = $gconfig{'path'};
3487 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3490 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3492 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3493 if ($gconfig{'http_proxy'}) {
3494 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3496 if ($gconfig{'ftp_proxy'}) {
3497 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3499 if ($gconfig{'noproxy'}) {
3500 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3503 # Find all root directories
3505 if (&get_miniserv_config(\%miniserv)) {
3506 @root_directories = ( $miniserv{'root'} );
3507 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3508 push(@root_directories, $miniserv{"extraroot_$i"});
3512 # Work out which module we are in, and read the per-module config file
3513 $0 =~ s/\\/\//g; # Force consistent path on Windows
3514 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3515 # In a foreign call - use the module name given
3516 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3517 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3518 @root_directories = ( $root_directory ) if (!@root_directories);
3520 elsif ($ENV{'SCRIPT_NAME'}) {
3521 my $sn = $ENV{'SCRIPT_NAME'};
3522 $sn =~ s/^$gconfig{'webprefix'}//
3523 if (!$gconfig{'webprefixnoredir'});
3524 if ($sn =~ /^\/([^\/]+)\//) {
3525 # Get module name from CGI path
3528 if ($ENV{'SERVER_ROOT'}) {
3529 $root_directory = $ENV{'SERVER_ROOT'};
3531 elsif ($ENV{'SCRIPT_FILENAME'}) {
3532 $root_directory = $ENV{'SCRIPT_FILENAME'};
3533 $root_directory =~ s/$sn$//;
3535 @root_directories = ( $root_directory ) if (!@root_directories);
3538 # Get root directory from miniserv.conf, and deduce module name from $0
3539 $root_directory = $root_directories[0];
3541 foreach my $r (@root_directories) {
3542 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3543 # Under a module directory
3548 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3554 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3557 # Work out of this is a web, command line or cron job
3558 if (!$main::webmin_script_type) {
3559 if ($ENV{'SCRIPT_NAME'}) {
3561 $main::webmin_script_type = 'web';
3564 # Cron jobs have no TTY
3565 if ($gconfig{'os_type'} eq 'windows' ||
3566 open(DEVTTY, ">/dev/tty")) {
3567 $main::webmin_script_type = 'cmd';
3571 $main::webmin_script_type = 'cron';
3576 # Set the umask based on config
3577 if ($gconfig{'umask'} && !$main::umask_already++) {
3578 umask(oct($gconfig{'umask'}));
3581 # If this is a cron job or other background task, set the nice level
3582 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3584 if ($gconfig{'nice'}) {
3585 eval 'POSIX::nice($gconfig{\'nice\'});';
3588 # Set IO scheduling class and priority
3589 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3591 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3592 if ($gconfig{'sclass'} ne '');
3593 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3594 if ($gconfig{'sprio'} ne '');
3596 &execute_command("$cmd >/dev/null 2>&1");
3599 $main::nice_already++;
3602 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3603 $base_remote_user = $u;
3604 $remote_user = $ENV{'REMOTE_USER'};
3607 # Find and load the configuration file for this module
3608 my (@ruinfo, $rgroup);
3609 $module_config_directory = "$config_directory/$module_name";
3610 if (&get_product_name() eq "usermin" &&
3611 -r "$module_config_directory/config.$remote_user") {
3613 $module_config_file = "$module_config_directory/config.$remote_user";
3615 elsif (&get_product_name() eq "usermin" &&
3616 (@ruinfo = getpwnam($remote_user)) &&
3617 ($rgroup = getgrgid($ruinfo[3])) &&
3618 -r "$module_config_directory/config.\@$rgroup") {
3619 # Based on group name
3620 $module_config_file = "$module_config_directory/config.\@$rgroup";
3624 $module_config_file = "$module_config_directory/config";
3627 &read_file_cached($module_config_file, \%config);
3629 # Fix up windows-specific substitutions in values
3630 foreach my $k (keys %config) {
3631 if ($config{$k} =~ /\$\{systemroot\}/) {
3632 my $root = &get_windows_root();
3633 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3638 # Record the initial module
3639 $main::initial_module_name ||= $module_name;
3641 # Set some useful variables
3643 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3644 $gconfig{'mobile_theme'} :
3645 defined($gconfig{'theme_'.$remote_user}) ?
3646 $gconfig{'theme_'.$remote_user} :
3647 defined($gconfig{'theme_'.$base_remote_user}) ?
3648 $gconfig{'theme_'.$base_remote_user} :
3650 @current_themes = split(/\s+/, $current_themes);
3651 $current_theme = $current_themes[0];
3652 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3653 $theme_root_directory = $theme_root_directories[0];
3654 @theme_configs = ( );
3655 foreach my $troot (@theme_root_directories) {
3657 &read_file_cached("$troot/config", \%onetconfig);
3658 &read_file_cached("$troot/config", \%tconfig);
3659 push(@theme_configs, \%onetconfig);
3661 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3662 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3664 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3665 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3667 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3668 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3669 if ($tconfig{'preload_functions'}) {
3670 # Force load of theme functions right now, if requested
3671 &load_theme_library();
3673 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3674 # Load the theme's Webmin:: package classes
3675 do "$theme_root_directory/$tconfig{'oofunctions'}";
3680 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3681 : "$var_directory/webmin.log";
3683 # Load language strings into %text
3684 my @langs = &list_languages();
3686 if ($gconfig{'acceptlang'}) {
3687 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3688 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3690 $accepted_lang = $al->{'lang'};
3695 $current_lang = $force_lang ? $force_lang :
3696 $accepted_lang ? $accepted_lang :
3697 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3698 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3699 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3700 foreach my $l (@langs) {
3701 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3703 @lang_order_list = &unique($default_lang,
3704 split(/:/, $current_lang_info->{'fallback'}),
3706 %text = &load_language($module_name);
3707 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3709 # Get the %module_info for this module
3711 my ($mi) = grep { $_->{'dir'} eq $module_name }
3712 &get_all_module_infos(2);
3713 %module_info = %$mi;
3714 $module_root_directory = &module_root_directory($module_name);
3717 if ($module_name && !$main::no_acl_check &&
3718 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3719 # Check if the HTTP user can access this module
3720 if (!&foreign_available($module_name)) {
3721 if (!&foreign_check($module_name)) {
3722 &error(&text('emodulecheck',
3723 "<i>$module_info{'desc'}</i>"));
3726 &error(&text('emodule', "<i>$u</i>",
3727 "<i>$module_info{'desc'}</i>"));
3730 $main::no_acl_check++;
3733 # Check the Referer: header for nasty redirects
3734 my @referers = split(/\s+/, $gconfig{'referers'});
3736 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3739 my $http_host = $ENV{'HTTP_HOST'};
3740 $http_host =~ s/:\d+$//;
3741 my $unsafe_index = $unsafe_index_cgi ||
3742 &get_module_variable('$unsafe_index_cgi');
3744 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
3745 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3747 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3748 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3749 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3750 ($referer_site && $referer_site ne $http_host &&
3751 &indexof($referer_site, @referers) < 0 ||
3752 !$referer_site && $gconfig{'referers_none'}) &&
3753 !$trust_unknown_referers &&
3754 !&get_module_variable('$trust_unknown_referers')) {
3755 # Looks like a link from elsewhere .. show an error
3756 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3758 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3759 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3760 if ($referer_site) {
3762 print &text('referer_warn',
3763 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3765 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3766 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3769 # No referer info given
3770 print &text('referer_warn_unknown', $url),"<p>\n";
3771 print &text('referer_fix1u'),"<p>\n";
3772 print &text('referer_fix2u'),"<p>\n";
3776 &footer("/", $text{'index'});
3779 $main::no_referers_check++;
3780 $main::completed_referers_check++;
3782 # Call theme post-init
3783 if (defined(&theme_post_init_config)) {
3784 &theme_post_init_config(@_);
3787 # Record that we have done the calling library in this package
3788 my ($callpkg, $lib) = caller();
3790 $main::done_foreign_require{$callpkg,$lib} = 1;
3792 # If a licence checking is enabled, do it now
3793 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3794 &foreign_check($gconfig{'licence_module'}) &&
3795 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3796 my $oldpwd = &get_current_dir();
3797 $main::done_licence_module_check++;
3798 $main::licence_module = $gconfig{'licence_module'};
3799 &foreign_require($main::licence_module, "licence_check.pl");
3800 ($main::licence_status, $main::licence_message) =
3801 &foreign_call($main::licence_module, "check_licence");
3805 # Export global variables to caller
3806 if ($main::export_to_caller) {
3807 foreach my $v ('$config_file', '%gconfig', '$null_file',
3808 '$path_separator', '@root_directories',
3809 '$root_directory', '$module_name',
3810 '$base_remote_user', '$remote_user',
3811 '$module_config_directory', '$module_config_file',
3812 '%config', '@current_themes', '$current_theme',
3813 '@theme_root_directories', '$theme_root_directory',
3814 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3815 '$webmin_logfile', '$current_lang',
3816 '$current_lang_info', '@lang_order_list', '%text',
3817 '%module_info', '$module_root_directory') {
3818 my ($vt, $vn) = split('', $v, 2);
3819 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3826 =head2 load_language([module], [directory])
3828 Returns a hashtable mapping text codes to strings in the appropriate language,
3829 based on the $current_lang global variable, which is in turn set based on
3830 the Webmin user's selection. The optional module parameter tells the function
3831 which module to load strings for, and defaults to the calling module. The
3832 optional directory parameter can be used to load strings from a directory
3835 In regular module development you will never need to call this function
3836 directly, as init_config calls it for you, and places the module's strings
3837 into the %text hash.
3843 my $root = $root_directory;
3844 my $ol = $gconfig{'overlang'};
3845 my ($dir) = ($_[1] || "lang");
3847 # Read global lang files
3848 foreach my $o (@lang_order_list) {
3849 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3850 return () if (!$ok && $o eq $default_lang);
3853 foreach my $o (@lang_order_list) {
3854 &read_file_cached("$root/$ol/$o", \%text);
3857 &read_file_cached("$config_directory/custom-lang", \%text);
3860 # Read module's lang files
3861 my $mdir = &module_root_directory($_[0]);
3862 foreach my $o (@lang_order_list) {
3863 &read_file_cached("$mdir/$dir/$o", \%text);
3866 foreach $o (@lang_order_list) {
3867 &read_file_cached("$mdir/$ol/$o", \%text);
3870 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3872 foreach $k (keys %text) {
3873 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3876 if (defined(&theme_load_language)) {
3877 &theme_load_language(\%text, $_[0]);
3882 =head2 text_subs(string)
3884 Used internally by load_language to expand $code substitutions in language
3890 if (substr($_[0], 0, 8) eq "include:") {
3893 open(INCLUDE, substr($_[0], 8));
3901 my $t = $_[1]->{$_[0]};
3902 return defined($t) ? $t : '$'.$_[0];
3906 =head2 text(message, [substitute]+)
3908 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3909 the substitute parameters. This makes it easy to use strings with placeholders
3910 that get replaced with programmatically generated text. For example :
3912 print &text('index_hello', $remote_user),"<p>\n";
3917 my $t = &get_module_variable('%text', 1);
3918 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3919 for(my $i=1; $i<@_; $i++) {
3920 $rv =~ s/\$$i/$_[$i]/g;
3925 =head2 encode_base64(string)
3927 Encodes a string into base64 format, for use in MIME email or HTTP
3928 authorization headers.
3934 pos($_[0]) = 0; # ensure start at the beginning
3935 while ($_[0] =~ /(.{1,57})/gs) {
3936 $res .= substr(pack('u57', $1), 1)."\n";
3939 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3940 my $padding = (3 - length($_[0]) % 3) % 3;
3941 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3945 =head2 decode_base64(string)
3947 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3954 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3955 if (length($str) % 4) {
3958 $str =~ s/=+$//; # remove padding
3959 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3960 while ($str =~ /(.{1,60})/gs) {
3961 my $len = chr(32 + length($1)*3/4); # compute length byte
3962 $res .= unpack("u", $len . $1 ); # uudecode
3967 =head2 get_module_info(module, [noclone], [forcache])
3969 Returns a hash containg details of the given module. Some useful keys are :
3971 =item dir - The module directory, like sendmail.
3973 =item desc - Human-readable description, in the current users' language.
3975 =item version - Optional module version number.
3977 =item os_support - List of supported operating systems and versions.
3979 =item category - Category on Webmin's left menu, like net.
3984 return () if ($_[0] =~ /^\./);
3985 my (%rv, $clone, $o);
3986 my $mdir = &module_root_directory($_[0]);
3987 &read_file_cached("$mdir/module.info", \%rv) || return ();
3989 foreach $o (@lang_order_list) {
3990 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
3991 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
3993 if ($clone && !$_[1] && $config_directory) {
3994 $rv{'clone'} = $rv{'desc'};
3995 &read_file("$config_directory/$_[0]/clone", \%rv);
3998 my %module_categories;
3999 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4000 my $pn = &get_product_name();
4001 if (defined($rv{'category_'.$pn})) {
4002 # Can override category for webmin/usermin
4003 $rv{'category'} = $rv{'category_'.$pn};
4005 $rv{'realcategory'} = $rv{'category'};
4006 $rv{'category'} = $module_categories{$_[0]}
4007 if (defined($module_categories{$_[0]}));
4009 # Apply description overrides
4010 $rv{'realdesc'} = $rv{'desc'};
4012 &read_file_cached("$config_directory/webmin.descs", \%descs);
4013 if ($descs{$_[0]." ".$current_lang}) {
4014 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4016 elsif ($descs{$_[0]}) {
4017 $rv{'desc'} = $descs{$_[0]};
4021 # Apply per-user description overridde
4022 my %gaccess = &get_module_acl(undef, "");
4023 if ($gaccess{'desc_'.$_[0]}) {
4024 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4028 if ($rv{'longdesc'}) {
4029 # All standard modules have an index.cgi
4030 $rv{'index_link'} = 'index.cgi';
4033 # Call theme-specific override function
4034 if (defined(&theme_get_module_info)) {
4035 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4041 =head2 get_all_module_infos(cachemode)
4043 Returns a list contains the information on all modules in this webmin
4044 install, including clones. Uses caching to reduce the number of module.info
4045 files that need to be read. Each element of the array is a hash reference
4046 in the same format as returned by get_module_info. The cache mode flag can be :
4047 0 = read and write, 1 = don't read or write, 2 = read only
4050 sub get_all_module_infos
4054 # Is the cache out of date? (ie. have any of the root's changed?)
4055 my $cache_file = "$config_directory/module.infos.cache";
4057 if (&read_file_cached($cache_file, \%cache)) {
4058 foreach my $r (@root_directories) {
4060 if ($st[9] != $cache{'mtime_'.$r}) {
4070 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4071 # Can use existing module.info cache
4073 foreach my $k (keys %cache) {
4074 if ($k =~ /^(\S+) (\S+)$/) {
4075 $mods{$1}->{$2} = $cache{$k};
4078 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4081 # Need to rebuild cache
4083 foreach my $r (@root_directories) {
4085 foreach my $m (readdir(DIR)) {
4086 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4087 my %minfo = &get_module_info($m, 0, 1);
4088 next if (!%minfo || !$minfo{'dir'});
4090 foreach $k (keys %minfo) {
4091 $cache{"${m} ${k}"} = $minfo{$k};
4096 $cache{'mtime_'.$r} = $st[9];
4098 $cache{'lang'} = $current_lang;
4099 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4102 # Override descriptions for modules for current user
4103 my %gaccess = &get_module_acl(undef, "");
4104 foreach my $m (@rv) {
4105 if ($gaccess{"desc_".$m->{'dir'}}) {
4106 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4110 # Apply installed flags
4112 &read_file_cached("$config_directory/installed.cache", \%installed);
4113 foreach my $m (@rv) {
4114 $m->{'installed'} = $installed{$m->{'dir'}};
4120 =head2 get_theme_info(theme)
4122 Returns a hash containing a theme's details, taken from it's theme.info file.
4123 Some useful keys are :
4125 =item dir - The theme directory, like blue-theme.
4127 =item desc - Human-readable description, in the current users' language.
4129 =item version - Optional module version number.
4131 =item os_support - List of supported operating systems and versions.
4136 return () if ($_[0] =~ /^\./);
4138 my $tdir = &module_root_directory($_[0]);
4139 &read_file("$tdir/theme.info", \%rv) || return ();
4140 foreach my $o (@lang_order_list) {
4141 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4147 =head2 list_languages
4149 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4150 Each is a hash reference with the following keys :
4152 =item lang - The short language code, like es for Spanish.
4154 =item desc - A human-readable description, in English.
4156 =item charset - An optional character set to use when displaying the language.
4158 =item titles - Set to 1 only if Webmin has title images for the language.
4160 =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.
4165 if (!@main::list_languages_cache) {
4168 open(LANG, "$root_directory/lang_list.txt");
4170 if (/^(\S+)\s+(.*)/) {
4171 my $l = { 'desc' => $2 };
4172 foreach $o (split(/,/, $1)) {
4173 if ($o =~ /^([^=]+)=(.*)$/) {
4177 $l->{'index'} = scalar(@rv);
4178 push(@main::list_languages_cache, $l);
4182 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4183 @main::list_languages_cache;
4185 return @main::list_languages_cache;
4188 =head2 read_env_file(file, &hash)
4190 Similar to Webmin's read_file function, but handles files containing shell
4191 environment variables formatted like :
4196 The file parameter is the full path to the file to read, and hash a Perl hash
4197 ref to read names and values into.
4203 &open_readfile(FILE, $_[0]) || return 0;
4206 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4207 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4208 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4216 =head2 write_env_file(file, &hash, [export])
4218 Writes out a hash to a file in name='value' format, suitable for use in a shell
4219 script. The parameters are :
4221 =item file - Full path for a file to write to
4223 =item hash - Hash reference of names and values to write.
4225 =item export - If set to 1, preceed each variable setting with the word 'export'.
4230 my $exp = $_[2] ? "export " : "";
4231 &open_tempfile(FILE, ">$_[0]");
4232 foreach my $k (keys %{$_[1]}) {
4233 my $v = $_[1]->{$k};
4234 if ($v =~ /^\S+$/) {
4235 &print_tempfile(FILE, "$exp$k=$v\n");
4238 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4241 &close_tempfile(FILE);
4244 =head2 lock_file(filename, [readonly], [forcefile])
4246 Lock a file for exclusive access. If the file is already locked, spin
4247 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4248 to work OK. The parameters are :
4250 =item filename - File or directory to lock.
4252 =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.
4254 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4259 my $realfile = &translate_filename($_[0]);
4260 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4261 my $no_lock = !&can_lock_file($realfile);
4262 my $lock_tries_count = 0;
4265 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4270 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4273 # Create the .lock file
4274 open(LOCKING, ">$realfile.lock") || return 0;
4275 my $lck = eval "flock(LOCKING, 2+4)";
4277 # Lock of lock file failed! Wait till later
4280 print LOCKING $$,"\n";
4281 eval "flock(LOCKING, 8)";
4284 $main::locked_file_list{$realfile} = int($_[1]);
4285 push(@main::temporary_files, "$realfile.lock");
4286 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4287 !&get_module_variable('$no_log_file_changes') &&
4289 # Grab a copy of this file for later diffing
4291 $main::locked_file_data{$realfile} = undef;
4293 $main::locked_file_type{$realfile} = 1;
4294 $main::locked_file_data{$realfile} = '';
4296 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4297 $main::locked_file_type{$realfile} = 2;
4298 $main::locked_file_data{$realfile} = $lnk;
4300 elsif (open(ORIGFILE, $realfile)) {
4301 $main::locked_file_type{$realfile} = 0;
4302 $main::locked_file_data{$realfile} = '';
4305 $main::locked_file_data{$realfile} .=$_;
4314 if ($lock_tries_count++ > 5*60) {
4315 # Give up after 5 minutes
4316 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4322 =head2 unlock_file(filename)
4324 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4325 file changes is enabled, then at unlock file a diff will be taken between the
4326 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4327 called. This can then be viewed in the Webmin Actions Log module.
4332 my $realfile = &translate_filename($_[0]);
4333 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4334 unlink("$realfile.lock") if (&can_lock_file($realfile));
4335 delete($main::locked_file_list{$realfile});
4336 if (exists($main::locked_file_data{$realfile})) {
4337 # Diff the new file with the old
4339 my $lnk = readlink($realfile);
4340 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4341 my $oldtype = $main::locked_file_type{$realfile};
4342 my $new = !defined($main::locked_file_data{$realfile});
4343 if ($new && !-e _) {
4344 # file doesn't exist, and never did! do nothing ..
4346 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4347 # is (or was) a directory ..
4348 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4349 push(@main::locked_file_diff,
4350 { 'type' => 'mkdir', 'object' => $realfile });
4352 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4353 push(@main::locked_file_diff,
4354 { 'type' => 'rmdir', 'object' => $realfile });
4357 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4358 # is (or was) a symlink ..
4359 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4360 push(@main::locked_file_diff,
4361 { 'type' => 'symlink', 'object' => $realfile,
4364 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4365 push(@main::locked_file_diff,
4366 { 'type' => 'unsymlink', 'object' => $realfile,
4367 'data' => $main::locked_file_data{$realfile} });
4369 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4370 push(@main::locked_file_diff,
4371 { 'type' => 'resymlink', 'object' => $realfile,
4376 # is a file, or has changed type?!
4377 my ($diff, $delete_file);
4378 my $type = "modify";
4380 open(NEWFILE, ">$realfile");
4385 if (!defined($main::locked_file_data{$realfile})) {
4388 open(ORIGFILE, ">$realfile.webminorig");
4389 print ORIGFILE $main::locked_file_data{$realfile};
4391 $diff = &backquote_command(
4392 "diff ".quotemeta("$realfile.webminorig")." ".
4393 quotemeta($realfile)." 2>/dev/null");
4394 push(@main::locked_file_diff,
4395 { 'type' => $type, 'object' => $realfile,
4396 'data' => $diff } ) if ($diff);
4397 unlink("$realfile.webminorig");
4398 unlink($realfile) if ($delete_file);
4401 if ($gconfig{'logfullfiles'}) {
4402 # Add file details to list of those to fully log
4403 $main::orig_file_data{$realfile} ||=
4404 $main::locked_file_data{$realfile};
4405 $main::orig_file_type{$realfile} ||=
4406 $main::locked_file_type{$realfile};
4409 delete($main::locked_file_data{$realfile});
4410 delete($main::locked_file_type{$realfile});
4414 =head2 test_lock(file)
4416 Returns 1 if some file is currently locked, 0 if not.
4421 my $realfile = &translate_filename($_[0]);
4422 return 0 if (!$_[0]);
4423 return 1 if (defined($main::locked_file_list{$realfile}));
4424 return 0 if (!&can_lock_file($realfile));
4426 if (open(LOCKING, "$realfile.lock")) {
4431 return $pid && kill(0, $pid);
4434 =head2 unlock_all_files
4436 Unlocks all files locked by the current script.
4439 sub unlock_all_files
4441 foreach $f (keys %main::locked_file_list) {
4446 =head2 can_lock_file(file)
4448 Returns 1 if some file should be locked, based on the settings in the
4449 Webmin Configuration module. For internal use by lock_file only.
4454 if (&is_readonly_mode()) {
4455 return 0; # never lock in read-only mode
4457 elsif ($gconfig{'lockmode'} == 0) {
4460 elsif ($gconfig{'lockmode'} == 1) {
4464 # Check if under any of the directories
4466 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4467 if (&same_file($d, $_[0]) ||
4468 &is_under_directory($d, $_[0])) {
4472 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4476 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4478 Log some action taken by a user. This is typically called at the end of a
4479 script, once all file changes are complete and all commands run. The
4482 =item action - A short code for the action being performed, like 'create'.
4484 =item type - A code for the type of object the action is performed to, like 'user'.
4486 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4488 =item params - A hash ref of additional information about the action.
4490 =item module - Name of the module in which the action was performed, which defaults to the current module.
4492 =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.
4494 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4496 =item client-ip - IP address of the browser that performed the action.
4501 return if (!$gconfig{'log'} || &is_readonly_mode());
4502 my $m = $_[4] ? $_[4] : &get_module_name();
4504 if ($gconfig{'logclear'}) {
4505 # check if it is time to clear the log
4506 my @st = stat("$webmin_logfile.time");
4507 my $write_logtime = 0;
4509 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4510 # clear logfile and all diff files
4511 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4512 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4513 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4514 unlink($webmin_logfile);
4521 if ($write_logtime) {
4522 open(LOGTIME, ">$webmin_logfile.time");
4523 print LOGTIME time(),"\n";
4528 # If an action script directory is defined, call the appropriate scripts
4529 if ($gconfig{'action_script_dir'}) {
4530 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4531 my ($basedir) = $gconfig{'action_script_dir'};
4533 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4536 opendir(DIR, $dir) or die "Can't open $dir: $!";
4537 while (defined($file = readdir(DIR))) {
4538 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4539 if (-x "$dir/$file") {
4540 # Call a script notifying it of the action
4542 $ENV{'ACTION_MODULE'} = &get_module_name();
4543 $ENV{'ACTION_ACTION'} = $_[0];
4544 $ENV{'ACTION_TYPE'} = $_[1];
4545 $ENV{'ACTION_OBJECT'} = $_[2];
4546 $ENV{'ACTION_SCRIPT'} = $script_name;
4547 foreach my $p (keys %param) {
4548 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4550 system("$dir/$file", @_,
4551 "<$null_file", ">$null_file", "2>&1");
4559 # should logging be done at all?
4560 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4561 split(/\s+/, $gconfig{'logusers'})) < 0);
4562 return if ($gconfig{'logmodules'} && &indexof($m,
4563 split(/\s+/, $gconfig{'logmodules'})) < 0);
4567 my @tm = localtime($now);
4568 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4569 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4570 $main::action_id_count++;
4571 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4572 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4573 $tm[2], $tm[1], $tm[0],
4574 $remote_user || '-',
4575 $main::session_id || '-',
4576 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4577 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4578 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4580 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4581 my $v = $_[3]->{$k};
4587 elsif (ref($v) eq 'ARRAY') {
4591 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4592 $line .= " $k='$vv'";
4596 foreach $vv (split(/\0/, $v)) {
4598 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4599 $line .= " $k='$vv'";
4602 $param{$k} = join(" ", @pv);
4604 open(WEBMINLOG, ">>$webmin_logfile");
4605 print WEBMINLOG $line,"\n";
4607 if ($gconfig{'logperms'}) {
4608 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4611 chmod(0600, $webmin_logfile);
4614 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4615 # Find and record the changes made to any locked files, or commands run
4617 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4618 foreach my $d (@main::locked_file_diff) {
4619 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4620 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4621 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4622 print DIFFLOG $d->{'data'};
4624 if ($d->{'input'}) {
4625 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4626 print DIFFLOG $d->{'input'};
4629 if ($gconfig{'logperms'}) {
4630 chmod(oct($gconfig{'logperms'}),
4631 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4632 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4636 @main::locked_file_diff = undef;
4638 if ($gconfig{'logfullfiles'}) {
4639 # Save the original contents of any modified files
4641 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4642 foreach my $f (keys %main::orig_file_data) {
4643 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4644 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4645 if (!defined($main::orig_file_type{$f})) {
4646 print ORIGLOG -1," ",$f,"\n";
4649 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4651 print ORIGLOG $main::orig_file_data{$f};
4653 if ($gconfig{'logperms'}) {
4654 chmod(oct($gconfig{'logperms'}),
4655 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4659 %main::orig_file_data = undef;
4660 %main::orig_file_type = undef;
4664 if ($gconfig{'logsyslog'}) {
4665 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4666 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4667 setlogsock("inet");';
4669 # Syslog module is installed .. try to convert to a
4670 # human-readable form
4672 my $mod = &get_module_name();
4673 my $mdir = module_root_directory($mod);
4674 if (-r "$mdir/log_parser.pl") {
4675 &foreign_require($mod, "log_parser.pl");
4677 foreach my $k (keys %{$_[3]}) {
4678 my $v = $_[3]->{$k};
4679 if (ref($v) eq 'ARRAY') {
4680 $params{$k} = join("\0", @$v);
4686 $msg = &foreign_call($mod, "parse_webmin_log",
4687 $remote_user, $script_name,
4688 $_[0], $_[1], $_[2], \%params);
4689 $msg =~ s/<[^>]*>//g; # Remove tags
4691 elsif ($_[0] eq "_config_") {
4692 my %wtext = &load_language("webminlog");
4693 $msg = $wtext{'search_config'};
4695 $msg ||= "$_[0] $_[1] $_[2]";
4696 my %info = &get_module_info($m);
4697 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4702 =head2 additional_log(type, object, data, [input])
4704 Records additional log data for an upcoming call to webmin_log, such
4705 as a command that was run or SQL that was executed. Typically you will never
4706 need to call this function directory.
4711 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4712 push(@main::locked_file_diff,
4713 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4714 'input' => $_[3] } );
4718 =head2 webmin_debug_log(type, message)
4720 Write something to the Webmin debug log. For internal use only.
4723 sub webmin_debug_log
4725 my ($type, $msg) = @_;
4726 return 0 if (!$main::opened_debug_log);
4727 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4728 if ($gconfig{'debug_modules'}) {
4729 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
4730 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
4733 my @tm = localtime($now);
4735 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4736 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4737 $tm[2], $tm[1], $tm[0],
4738 $remote_user || "-",
4739 $ENV{'REMOTE_HOST'} || "-",
4740 &get_module_name() || "-",
4743 seek(main::DEBUGLOG, 0, 2);
4744 print main::DEBUGLOG $line."\n";
4748 =head2 system_logged(command)
4750 Just calls the Perl system() function, but also logs the command run.
4755 if (&is_readonly_mode()) {
4756 print STDERR "Vetoing command $_[0]\n";
4759 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4760 my $cmd = join(" ", @realcmd);
4762 if ($cmd =~ s/(\s*&\s*)$//) {
4765 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4766 $cmd =~ s/^\((.*)\)\s*$/$1/;
4768 &additional_log('exec', undef, $cmd);
4769 return system(@realcmd);
4772 =head2 backquote_logged(command)
4774 Executes a command and returns the output (like `command`), but also logs it.
4777 sub backquote_logged
4779 if (&is_readonly_mode()) {
4781 print STDERR "Vetoing command $_[0]\n";
4784 my $realcmd = &translate_command($_[0]);
4787 if ($cmd =~ s/(\s*&\s*)$//) {
4790 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4791 $cmd =~ s/^\((.*)\)\s*$/$1/;
4793 &additional_log('exec', undef, $cmd);
4794 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4798 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4800 Runs some command, waiting at most the given number of seconds for it to
4801 complete, and returns the output. The maxlines parameter sets the number
4802 of lines of output to capture. The safe parameter should be set to 1 if the
4803 command is safe for read-only mode users to run.
4806 sub backquote_with_timeout
4808 my $realcmd = &translate_command($_[0]);
4809 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4810 if ($gconfig{'debug_what_cmd'});
4812 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4817 my $elapsed = time() - $start;
4818 last if ($elapsed > $_[1]);
4820 vec($rmask, fileno(OUT), 1) = 1;
4821 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4822 last if (!$sel || $sel < 0);
4824 last if (!defined($line));
4827 if ($_[3] && $linecount >= $_[3]) {
4832 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4836 return wantarray ? ($out, $timed_out) : $out;
4839 =head2 backquote_command(command, safe?)
4841 Executes a command and returns the output (like `command`), subject to
4842 command translation. The safe parameter should be set to 1 if the command
4843 is safe for read-only mode users to run.
4846 sub backquote_command
4848 if (&is_readonly_mode() && !$_[1]) {
4849 print STDERR "Vetoing command $_[0]\n";
4853 my $realcmd = &translate_command($_[0]);
4854 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4858 =head2 kill_logged(signal, pid, ...)
4860 Like Perl's built-in kill function, but also logs the fact that some process
4861 was killed. On Windows, falls back to calling process.exe to terminate a
4867 return scalar(@_)-1 if (&is_readonly_mode());
4868 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4869 if ($gconfig{'debug_what_procs'});
4870 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4871 if ($gconfig{'os_type'} eq 'windows') {
4872 # Emulate some kills with process.exe
4873 my $arg = $_[0] eq "KILL" ? "-k" :
4874 $_[0] eq "TERM" ? "-q" :
4875 $_[0] eq "STOP" ? "-s" :
4876 $_[0] eq "CONT" ? "-r" : undef;
4878 foreach my $p (@_[1..@_-1]) {
4880 $ok ||= kill($_[0], $p);
4883 &execute_command("process $arg $p");
4895 =head2 rename_logged(old, new)
4897 Re-names a file and logs the rename. If the old and new files are on different
4898 filesystems, calls mv or the Windows rename function to do the job.
4903 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4904 return &rename_file($_[0], $_[1]);
4907 =head2 rename_file(old, new)
4909 Renames a file or directory. If the old and new files are on different
4910 filesystems, calls mv or the Windows rename function to do the job.
4915 if (&is_readonly_mode()) {
4916 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4919 my $src = &translate_filename($_[0]);
4920 my $dst = &translate_filename($_[1]);
4921 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4922 if ($gconfig{'debug_what_ops'});
4923 my $ok = rename($src, $dst);
4924 if (!$ok && $! !~ /permission/i) {
4925 # Try the mv command, in case this is a cross-filesystem rename
4926 if ($gconfig{'os_type'} eq 'windows') {
4927 # Need to use rename
4928 my $out = &backquote_command("rename ".quotemeta($_[0]).
4929 " ".quotemeta($_[1])." 2>&1");
4931 $! = $out if (!$ok);
4935 my $out = &backquote_command("mv ".quotemeta($_[0]).
4936 " ".quotemeta($_[1])." 2>&1");
4938 $! = $out if (!$ok);
4944 =head2 symlink_logged(src, dest)
4946 Create a symlink, and logs it. Effectively does the same thing as the Perl
4953 my $rv = &symlink_file($_[0], $_[1]);
4954 &unlock_file($_[1]);
4958 =head2 symlink_file(src, dest)
4960 Creates a soft link, unless in read-only mode. Effectively does the same thing
4961 as the Perl symlink function.
4966 if (&is_readonly_mode()) {
4967 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4970 my $src = &translate_filename($_[0]);
4971 my $dst = &translate_filename($_[1]);
4972 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
4973 if ($gconfig{'debug_what_ops'});
4974 return symlink($src, $dst);
4977 =head2 link_file(src, dest)
4979 Creates a hard link, unless in read-only mode. The existing new link file
4980 will be deleted if necessary. Effectively the same as Perl's link function.
4985 if (&is_readonly_mode()) {
4986 print STDERR "Vetoing link from $_[0] to $_[1]\n";
4989 my $src = &translate_filename($_[0]);
4990 my $dst = &translate_filename($_[1]);
4991 &webmin_debug_log('LINK', "src=$src dst=$dst")
4992 if ($gconfig{'debug_what_ops'});
4993 unlink($dst); # make sure link works
4994 return link($src, $dst);
4997 =head2 make_dir(dir, perms, recursive)
4999 Creates a directory and sets permissions on it, unless in read-only mode.
5000 The perms parameter sets the octal permissions to apply, which unlike Perl's
5001 mkdir will really get set. The recursive flag can be set to 1 to have the
5002 function create parent directories too.
5007 my ($dir, $perms, $recur) = @_;
5008 if (&is_readonly_mode()) {
5009 print STDERR "Vetoing directory $dir\n";
5012 $dir = &translate_filename($dir);
5013 my $exists = -d $dir ? 1 : 0;
5014 return 1 if ($exists && $recur); # already exists
5015 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5016 my $rv = mkdir($dir, $perms);
5017 if (!$rv && $recur) {
5018 # Failed .. try mkdir -p
5019 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5020 my $ex = &execute_command("mkdir $param "."e_path($dir));
5026 chmod($perms, $dir);
5031 =head2 set_ownership_permissions(user, group, perms, file, ...)
5033 Sets the user, group owner and permissions on some files. The parameters are :
5035 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5037 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5039 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5041 =item file - One or more files or directories to modify.
5044 sub set_ownership_permissions
5046 my ($user, $group, $perms, @files) = @_;
5047 if (&is_readonly_mode()) {
5048 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5051 @files = map { &translate_filename($_) } @files;
5052 if ($gconfig{'debug_what_ops'}) {
5053 foreach my $f (@files) {
5054 &webmin_debug_log('PERMS',
5055 "file=$f user=$user group=$group perms=$perms");
5059 if (defined($user)) {
5060 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5062 if (defined($group)) {
5063 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5066 my @uinfo = getpwuid($uid);
5069 $rv = chown($uid, $gid, @files);
5071 if ($rv && defined($perms)) {
5072 $rv = chmod($perms, @files);
5077 =head2 unlink_logged(file, ...)
5079 Like Perl's unlink function, but locks the files beforehand and un-locks them
5080 after so that the deletion is logged by Webmin.
5086 foreach my $f (@_) {
5087 if (!&test_lock($f)) {
5092 my @rv = &unlink_file(@_);
5093 foreach my $f (@_) {
5098 return wantarray ? @rv : $rv[0];
5101 =head2 unlink_file(file, ...)
5103 Deletes some files or directories. Like Perl's unlink function, but also
5104 recursively deletes directories with the rm command if needed.
5109 return 1 if (&is_readonly_mode());
5112 foreach my $f (@_) {
5113 my $realf = &translate_filename($f);
5114 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5116 if (!rmdir($realf)) {
5118 if ($gconfig{'os_type'} eq 'windows') {
5119 # Call del and rmdir commands
5122 my $out = `del /q "$qm" 2>&1`;
5124 $out = `rmdir "$qm" 2>&1`;
5129 my $qm = quotemeta($realf);
5130 $out = `rm -rf $qm 2>&1`;
5139 if (!unlink($realf)) {
5145 return wantarray ? ($rv, $err) : $rv;
5148 =head2 copy_source_dest(source, dest)
5150 Copy some file or directory to a new location. Returns 1 on success, or 0
5151 on failure - also sets $! on failure. If the source is a directory, uses
5152 piped tar commands to copy a whole directory structure including permissions
5156 sub copy_source_dest
5158 return (1, undef) if (&is_readonly_mode());
5159 my ($src, $dst) = @_;
5162 &webmin_debug_log('COPY', "src=$src dst=$dst")
5163 if ($gconfig{'debug_what_ops'});
5164 if ($gconfig{'os_type'} eq 'windows') {
5165 # No tar or cp on windows, so need to use copy command
5169 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5172 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5180 # A directory .. need to copy with tar command
5181 my @st = stat($src);
5184 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5185 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5192 # Can just copy with cp
5193 my $out = &backquote_logged("cp -p ".quotemeta($src).
5194 " ".quotemeta($dst)." 2>&1");
5200 return wantarray ? ($ok, $err) : $ok;
5203 =head2 remote_session_name(host|&server)
5205 Generates a session ID for some server. For this server, this will always
5206 be an empty string. For a server object it will include the hostname and
5207 port and PID. For a server name, it will include the hostname and PID. For
5211 sub remote_session_name
5213 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5214 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5215 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5216 ref($_[0]) ? "" : "$_[0].$$";
5219 =head2 remote_foreign_require(server, module, file)
5221 Connects to rpc.cgi on a remote webmin server and have it open a session
5222 to a process that will actually do the require and run functions. This is the
5223 equivalent for foreign_require, but for a remote Webmin system. The server
5224 parameter can either be a hostname of a system registered in the Webmin
5225 Servers Index module, or a hash reference for a system from that module.
5228 sub remote_foreign_require
5230 my $call = { 'action' => 'require',
5233 my $sn = &remote_session_name($_[0]);
5234 if ($remote_session{$sn}) {
5235 $call->{'session'} = $remote_session{$sn};
5238 $call->{'newsession'} = 1;
5240 my $rv = &remote_rpc_call($_[0], $call);
5241 if ($rv->{'session'}) {
5242 $remote_session{$sn} = $rv->{'session'};
5243 $remote_session_server{$sn} = $_[0];
5247 =head2 remote_foreign_call(server, module, function, [arg]*)
5249 Call a function on a remote server. Must have been setup first with
5250 remote_foreign_require for the same server and module. Equivalent to
5251 foreign_call, but with the extra server parameter to specify the remote
5255 sub remote_foreign_call
5257 return undef if (&is_readonly_mode());
5258 my $sn = &remote_session_name($_[0]);
5259 return &remote_rpc_call($_[0], { 'action' => 'call',
5262 'session' => $remote_session{$sn},
5263 'args' => [ @_[3 .. $#_] ] } );
5266 =head2 remote_foreign_check(server, module, [api-only])
5268 Checks if some module is installed and supported on a remote server. Equivilant
5269 to foreign_check, but for the remote Webmin system specified by the server
5273 sub remote_foreign_check
5275 return &remote_rpc_call($_[0], { 'action' => 'check',
5280 =head2 remote_foreign_config(server, module)
5282 Gets the configuration for some module from a remote server, as a hash.
5283 Equivalent to foreign_config, but for a remote system.
5286 sub remote_foreign_config
5288 return &remote_rpc_call($_[0], { 'action' => 'config',
5289 'module' => $_[1] });
5292 =head2 remote_eval(server, module, code)
5294 Evaluates some perl code in the context of a module on a remote webmin server.
5295 The server parameter must be the hostname of a remote system, module must
5296 be a module directory name, and code a string of Perl code to run. This can
5297 only be called after remote_foreign_require for the same server and module.
5302 return undef if (&is_readonly_mode());
5303 my $sn = &remote_session_name($_[0]);
5304 return &remote_rpc_call($_[0], { 'action' => 'eval',
5307 'session' => $remote_session{$sn} });
5310 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5312 Transfers some local file to another server via Webmin's RPC protocol, and
5313 returns the resulting remote filename. If the remotefile parameter is given,
5314 that is the destination filename which will be used. Otherwise a randomly
5315 selected temporary filename will be used, and returned by the function.
5320 return undef if (&is_readonly_mode());
5322 my $sn = &remote_session_name($_[0]);
5323 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5324 # Copy data over TCP connection
5325 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5327 'name' => $_[3] } );
5329 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5330 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5331 return &$main::remote_error_handler("Failed to transfer file : $error")
5334 while(read(FILE, $got, 1024) > 0) {
5338 shutdown(TWRITE, 1);
5340 if ($error && $error !~ /^OK/) {
5341 # Got back an error!
5342 return &$main::remote_error_handler("Failed to transfer file : $error");
5348 # Just pass file contents as parameters
5350 while(read(FILE, $got, 1024) > 0) {
5354 return &remote_rpc_call($_[0], { 'action' => 'write',
5357 'session' => $remote_session{$sn} });
5361 =head2 remote_read(server, localfile, remotefile)
5363 Transfers a file from a remote server to this system, using Webmin's RPC
5364 protocol. The server parameter must be the hostname of a system registered
5365 in the Webmin Servers Index module, localfile is the destination path on this
5366 system, and remotefile is the file to fetch from the remote server.
5371 my $sn = &remote_session_name($_[0]);
5372 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5373 # Copy data over TCP connection
5374 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5375 'file' => $_[2] } );
5377 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5380 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5381 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5382 return &$main::remote_error_handler("Failed to transfer file : $error")
5385 open(FILE, ">$_[1]");
5386 while(read(TREAD, $got, 1024) > 0) {
5393 # Just get data as return value
5394 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5396 'session' => $remote_session{$sn} });
5397 open(FILE, ">$_[1]");
5403 =head2 remote_finished
5405 Close all remote sessions. This happens automatically after a while
5406 anyway, but this function should be called to clean things up faster.
5411 foreach my $sn (keys %remote_session) {
5412 my $server = $remote_session_server{$sn};
5413 &remote_rpc_call($server, { 'action' => 'quit',
5414 'session' => $remote_session{$sn} } );
5415 delete($remote_session{$sn});
5416 delete($remote_session_server{$sn});
5418 foreach $fh (keys %fast_fh_cache) {
5420 delete($fast_fh_cache{$fh});
5424 =head2 remote_error_setup(&function)
5426 Sets a function to be called instead of &error when a remote RPC operation
5427 fails. Useful if you want to have more control over your remote operations.
5430 sub remote_error_setup
5432 $main::remote_error_handler = $_[0] || \&error;
5435 =head2 remote_rpc_call(server, structure)
5437 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5438 and then reads back a reply structure. This is mainly for internal use only,
5439 and is called by the other remote_* functions.
5445 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5447 # Server structure was given
5449 $serv->{'user'} || $serv->{'id'} == 0 ||
5450 return &$main::remote_error_handler(
5451 "No Webmin login set for server");
5454 # lookup the server in the webmin servers module if needed
5455 if (!defined(%main::remote_servers_cache)) {
5456 &foreign_require("servers", "servers-lib.pl");
5457 foreach $s (&foreign_call("servers", "list_servers")) {
5458 $main::remote_servers_cache{$s->{'host'}} = $s;
5459 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5462 $serv = $main::remote_servers_cache{$_[0]};
5463 $serv || return &$main::remote_error_handler(
5464 "No Webmin Servers entry for $_[0]");
5465 $serv->{'user'} || return &$main::remote_error_handler(
5466 "No login set for server $_[0]");
5468 my $ip = $serv->{'ip'} || $serv->{'host'};
5470 # Work out the username and password
5472 if ($serv->{'sameuser'}) {
5473 $user = $remote_user;
5474 defined($main::remote_pass) || return &$main::remote_error_handler(
5475 "Password for this server is not available");
5476 $pass = $main::remote_pass;
5479 $user = $serv->{'user'};
5480 $pass = $serv->{'pass'};
5483 if ($serv->{'fast'} || !$sn) {
5484 # Make TCP connection call to fastrpc.cgi
5485 if (!$fast_fh_cache{$sn} && $sn) {
5486 # Need to open the connection
5487 my $con = &make_http_connection(
5488 $ip, $serv->{'port'}, $serv->{'ssl'},
5489 "POST", "/fastrpc.cgi");
5490 return &$main::remote_error_handler(
5491 "Failed to connect to $serv->{'host'} : $con")
5493 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5494 &write_http_connection($con, "User-agent: Webmin\r\n");
5495 my $auth = &encode_base64("$user:$pass");
5497 &write_http_connection($con, "Authorization: basic $auth\r\n");
5498 &write_http_connection($con, "Content-length: ",
5499 length($tostr),"\r\n");
5500 &write_http_connection($con, "\r\n");
5501 &write_http_connection($con, $tostr);
5503 # read back the response
5504 my $line = &read_http_connection($con);
5505 $line =~ tr/\r\n//d;
5506 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5507 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5509 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5510 return &$main::remote_error_handler("HTTP error : $line");
5512 $line = &read_http_connection($con);
5513 $line =~ tr/\r\n//d;
5515 $line = &read_http_connection($con);
5516 if ($line =~ /^0\s+(.*)/) {
5517 return &$main::remote_error_handler("RPC error : $1");
5519 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5520 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5521 # Started ok .. connect and save SID
5522 &close_http_connection($con);
5523 my ($port, $sid, $version, $error) = ($1, $2, $3);
5524 &open_socket($ip, $port, $sid, \$error);
5525 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5527 $fast_fh_cache{$sn} = $sid;
5528 $remote_server_version{$sn} = $version;
5531 while($stuff = &read_http_connection($con)) {
5534 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5537 elsif (!$fast_fh_cache{$sn}) {
5538 # Open the connection by running fastrpc.cgi locally
5539 pipe(RPCOUTr, RPCOUTw);
5543 open(STDOUT, ">&RPCOUTw");
5547 $ENV{'REQUEST_METHOD'} = 'GET';
5548 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5549 $ENV{'SERVER_ROOT'} ||= $root_directory;
5551 if ($base_remote_user ne 'root' &&
5552 $base_remote_user ne 'admin') {
5553 # Need to fake up a login for the CGI!
5554 &read_acl(undef, \%acl);
5555 $ENV{'BASE_REMOTE_USER'} =
5556 $ENV{'REMOTE_USER'} =
5557 $acl{'root'} ? 'root' : 'admin';
5559 delete($ENV{'FOREIGN_MODULE_NAME'});
5560 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5561 chdir($root_directory);
5562 if (!exec("$root_directory/fastrpc.cgi")) {
5563 print "exec failed : $!\n";
5570 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5574 if ($line =~ /^0\s+(.*)/) {
5575 return &$main::remote_error_handler("RPC error : $2");
5577 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5578 # Started ok .. connect and save SID
5580 my ($port, $sid, $error) = ($1, $2, undef);
5581 &open_socket("localhost", $port, $sid, \$error);
5582 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5583 $fast_fh_cache{$sn} = $sid;
5590 &error("Bad response from fastrpc.cgi : $line");
5593 # Got a connection .. send off the request
5594 my $fh = $fast_fh_cache{$sn};
5595 my $tostr = &serialise_variable($_[1]);
5596 print $fh length($tostr)," $fh\n";
5598 my $rlen = int(<$fh>);
5599 my ($fromstr, $got);
5600 while(length($fromstr) < $rlen) {
5601 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5602 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5605 my $from = &unserialise_variable($fromstr);
5607 return &$main::remote_error_handler("Remote Webmin error");
5609 if (defined($from->{'arv'})) {
5610 return @{$from->{'arv'}};
5613 return $from->{'rv'};
5617 # Call rpc.cgi on remote server
5618 my $tostr = &serialise_variable($_[1]);
5620 my $con = &make_http_connection($ip, $serv->{'port'},
5621 $serv->{'ssl'}, "POST", "/rpc.cgi");
5622 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5624 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5625 &write_http_connection($con, "User-agent: Webmin\r\n");
5626 my $auth = &encode_base64("$user:$pass");
5628 &write_http_connection($con, "Authorization: basic $auth\r\n");
5629 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5630 &write_http_connection($con, "\r\n");
5631 &write_http_connection($con, $tostr);
5633 # read back the response
5634 my $line = &read_http_connection($con);
5635 $line =~ tr/\r\n//d;
5636 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5637 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5639 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5641 $line = &read_http_connection($con);
5642 $line =~ tr/\r\n//d;
5645 while($line = &read_http_connection($con)) {
5649 my $from = &unserialise_variable($fromstr);
5650 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5651 if (defined($from->{'arv'})) {
5652 return @{$from->{'arv'}};
5655 return $from->{'rv'};
5660 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5662 Executes some function in parallel on multiple servers at once. Fills in
5663 the returns and errors arrays respectively. If the module and library
5664 parameters are given, that module is remotely required on the server first,
5665 to check if it is connectable. The parameters are :
5667 =item servers - A list of Webmin system hash references.
5669 =item parallel - Number of parallel operations to perform.
5671 =item function - Reference to function to call for each system.
5673 =item args - Additional parameters to the function.
5675 =item returns - Array ref to place return values into, in same order as servers.
5677 =item errors - Array ref to place error messages into.
5679 =item module - Optional module to require on the remote system first.
5681 =item library - Optional library to require in the module.
5684 sub remote_multi_callback
5686 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5687 &remote_error_setup(\&remote_multi_callback_error);
5689 # Call the functions
5691 foreach my $g (@$servs) {
5697 $remote_multi_callback_err = undef;
5699 # Require the remote lib
5700 &remote_foreign_require($g->{'host'}, $mod, $lib);
5701 if ($remote_multi_callback_err) {
5702 # Failed .. return error
5703 print $wh &serialise_variable(
5704 [ undef, $remote_multi_callback_err ]);
5710 my $a = ref($args) ? $args->[$p] : $args;
5711 my $rv = &$func($g, $a);
5714 print $wh &serialise_variable(
5715 [ $rv, $remote_multi_callback_err ]);
5723 # Read back the results
5725 foreach my $g (@$servs) {
5729 $errs->[$p] = "Failed to read response from $g->{'host'}";
5732 my $rv = &unserialise_variable($line);
5734 $rets->[$p] = $rv->[0];
5735 $errs->[$p] = $rv->[1];
5740 &remote_error_setup(undef);
5743 sub remote_multi_callback_error
5745 $remote_multi_callback_err = $_[0];
5748 =head2 serialise_variable(variable)
5750 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5751 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5752 called on each member to serialize the entire object.
5755 sub serialise_variable
5757 if (!defined($_[0])) {
5763 $rv = &urlize($_[0]);
5765 elsif ($r eq 'SCALAR') {
5766 $rv = &urlize(${$_[0]});
5768 elsif ($r eq 'ARRAY') {
5769 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5771 elsif ($r eq 'HASH') {
5772 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5773 &urlize(&serialise_variable($_[0]->{$_})) }
5776 elsif ($r eq 'REF') {
5777 $rv = &serialise_variable(${$_[0]});
5779 elsif ($r eq 'CODE') {
5784 # An object - treat as a hash
5785 $r = "OBJECT ".&urlize($r);
5786 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5787 &urlize(&serialise_variable($_[0]->{$_})) }
5790 return ($r ? $r : 'VAL').",".$rv;
5793 =head2 unserialise_variable(string)
5795 Converts a string created by serialise_variable() back into the original
5796 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5797 object, the same class is used on this system, if available.
5800 sub unserialise_variable
5802 my @v = split(/,/, $_[0]);
5804 if ($v[0] eq 'VAL') {
5805 @v = split(/,/, $_[0], -1);
5806 $rv = &un_urlize($v[1]);
5808 elsif ($v[0] eq 'SCALAR') {
5809 local $r = &un_urlize($v[1]);
5812 elsif ($v[0] eq 'ARRAY') {
5814 for(my $i=1; $i<@v; $i++) {
5815 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5818 elsif ($v[0] eq 'HASH') {
5820 for(my $i=1; $i<@v; $i+=2) {
5821 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5822 &unserialise_variable(&un_urlize($v[$i+1]));
5825 elsif ($v[0] eq 'REF') {
5826 local $r = &unserialise_variable($v[1]);
5829 elsif ($v[0] eq 'UNDEF') {
5832 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5833 # An object hash that we have to re-bless
5836 for(my $i=1; $i<@v; $i+=2) {
5837 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5838 &unserialise_variable(&un_urlize($v[$i+1]));
5846 =head2 other_groups(user)
5848 Returns a list of secondary groups a user is a member of, as a list of
5857 while(my @g = getgrent()) {
5858 my @m = split(/\s+/, $g[3]);
5859 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5861 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5865 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5867 Returns HTML for a button that pops up a data chooser window. The parameters
5870 =item dayfield - Name of the text field to place the day of the month into.
5872 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5874 =item yearfield - Name of the text field to place the year into.
5877 sub date_chooser_button
5879 return &theme_date_chooser_button(@_)
5880 if (defined(&theme_date_chooser_button));
5881 my ($w, $h) = (250, 225);
5882 if ($gconfig{'db_sizedate'}) {
5883 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5885 return "<input type=button onClick='window.dfield = form.$_[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";
5888 =head2 help_file(module, file)
5890 Returns the path to a module's help file of some name, typically under the
5891 help directory with a .html extension.
5896 my $mdir = &module_root_directory($_[0]);
5897 my $dir = "$mdir/help";
5898 foreach my $o (@lang_order_list) {
5899 my $lang = "$dir/$_[1].$o.html";
5900 return $lang if (-r $lang);
5902 return "$dir/$_[1].html";
5907 Seeds the random number generator, if not already done in this script. On Linux
5908 this makes use of the current time, process ID and a read from /dev/urandom.
5909 On other systems, only the current time and process ID are used.
5914 if (!$main::done_seed_random) {
5915 if (open(RANDOM, "/dev/urandom")) {
5917 read(RANDOM, $buf, 4);
5919 srand(time() ^ $$ ^ $buf);
5924 $main::done_seed_random = 1;
5928 =head2 disk_usage_kb(directory)
5930 Returns the number of kB used by some directory and all subdirs. Implemented
5931 by calling the C<du -k> command.
5936 my $dir = &translate_filename($_[0]);
5938 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5940 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5942 return $out =~ /^([0-9]+)/ ? $1 : "???";
5945 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
5947 Returns the number of bytes taken up by all files in some directory and all
5948 sub-directories, by summing up their lengths. The disk_usage_kb is more
5949 reflective of reality, as the filesystem typically pads file sizes to 1k or
5953 sub recursive_disk_usage
5955 my $dir = &translate_filename($_[0]);
5962 my @st = stat($dir);
5968 my @files = readdir(DIR);
5970 foreach my $f (@files) {
5971 next if ($f eq "." || $f eq "..");
5972 next if ($skip && $f =~ /$skip/);
5973 next if ($only && $f !~ /$only/);
5974 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
5980 =head2 help_search_link(term, [ section, ... ] )
5982 Returns HTML for a link to the man module for searching local and online
5983 docs for various search terms. The term parameter can either be a single
5984 word like 'bind', or a space-separated list of words. This function is typically
5985 used by modules that want to refer users to additional documentation in man
5986 pages or local system doc files.
5989 sub help_search_link
5991 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
5992 my $for = &urlize(shift(@_));
5993 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
5994 join("&", map { "section=$_" } @_)."&".
5995 "for=$for&exact=1&check=".&get_module_name()."'>".
5996 $text{'helpsearch'}."</a>\n";
6003 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6005 Opens a connection to some HTTP server, maybe through a proxy, and returns
6006 a handle object. The handle can then be used to send additional headers
6007 and read back a response. If anything goes wrong, returns an error string.
6008 The parameters are :
6010 =item host - Hostname or IP address of the webserver to connect to.
6012 =item port - HTTP port number to connect to.
6014 =item ssl - Set to 1 to connect in SSL mode.
6016 =item method - HTTP method, like GET or POST.
6018 =item page - Page to request on the webserver, like /foo/index.html
6020 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6023 sub make_http_connection
6025 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6028 foreach my $h (@$headers) {
6029 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6033 if (&is_readonly_mode()) {
6034 return "HTTP connections not allowed in readonly mode";
6036 my $rv = { 'fh' => time().$$ };
6039 eval "use Net::SSLeay";
6040 $@ && return $text{'link_essl'};
6041 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6042 eval "Net::SSLeay::load_error_strings()";
6043 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6044 return "Failed to create SSL context";
6045 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6046 return "Failed to create SSL connection";
6048 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6049 !&no_proxy($host)) {
6052 &open_socket($1, $2, $rv->{'fh'}, \$error);
6055 my $fh = $rv->{'fh'};
6056 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6057 if ($gconfig{'proxy_user'}) {
6058 my $auth = &encode_base64(
6059 "$gconfig{'proxy_user'}:".
6060 "$gconfig{'proxy_pass'}");
6061 $auth =~ tr/\r\n//d;
6062 print $fh "Proxy-Authorization: Basic $auth\r\n";
6066 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6067 return "Proxy error : $3" if ($2 != 200);
6070 return "Proxy error : $line";
6075 elsif (!$gconfig{'proxy_fallback'}) {
6076 # Connection to proxy failed - give up
6083 &open_socket($host, $port, $rv->{'fh'}, \$error);
6084 return $error if ($error);
6086 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6087 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6088 return "SSL connect() failed";
6089 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6090 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6093 # Plain HTTP request
6095 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6096 !&no_proxy($host)) {
6099 &open_socket($1, $2, $rv->{'fh'}, \$error);
6103 my $fh = $rv->{'fh'};
6104 my $rtxt = $method." ".
6105 "http://$host:$port$page HTTP/1.0\r\n";
6106 if ($gconfig{'proxy_user'}) {
6107 my $auth = &encode_base64(
6108 "$gconfig{'proxy_user'}:".
6109 "$gconfig{'proxy_pass'}");
6110 $auth =~ tr/\r\n//d;
6111 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6116 elsif (!$gconfig{'proxy_fallback'}) {
6121 # Connecting directly
6123 &open_socket($host, $port, $rv->{'fh'}, \$error);
6124 return $error if ($error);
6125 my $fh = $rv->{'fh'};
6126 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6133 =head2 read_http_connection(&handle, [bytes])
6135 Reads either one line or up to the specified number of bytes from the handle,
6136 originally supplied by make_http_connection.
6139 sub read_http_connection
6143 if ($h->{'ssl_con'}) {
6146 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6147 # need to read more..
6148 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6150 $rv = $h->{'buffer'};
6151 delete($h->{'buffer'});
6154 $h->{'buffer'} .= $more;
6156 $rv = substr($h->{'buffer'}, 0, $idx+1);
6157 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6160 if (length($h->{'buffer'})) {
6161 $rv = $h->{'buffer'};
6162 delete($h->{'buffer'});
6165 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6171 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6174 my $fh = $h->{'fh'};
6178 $rv = undef if ($rv eq "");
6182 =head2 write_http_connection(&handle, [data+])
6184 Writes the given data to the given HTTP connection handle.
6187 sub write_http_connection
6190 my $fh = $h->{'fh'};
6192 if ($h->{'ssl_ctx'}) {
6193 foreach my $s (@_) {
6194 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6195 $allok = 0 if (!$ok);
6199 my $ok = (print $fh @_);
6200 $allok = 0 if (!$ok);
6205 =head2 close_http_connection(&handle)
6207 Closes a connection to an HTTP server, identified by the given handle.
6210 sub close_http_connection
6216 =head2 clean_environment
6218 Deletes any environment variables inherited from miniserv so that they
6219 won't be passed to programs started by webmin. This is useful when calling
6220 programs that check for CGI-related environment variables and modify their
6221 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6224 sub clean_environment
6226 %UNCLEAN_ENV = %ENV;
6227 foreach my $k (keys %ENV) {
6228 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6232 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6233 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6234 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6235 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6236 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6237 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6238 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6239 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD') {
6244 =head2 reset_environment
6246 Puts the environment back how it was before clean_environment was callled.
6249 sub reset_environment
6251 if (defined(%UNCLEAN_ENV)) {
6252 foreach my $k (keys %UNCLEAN_ENV) {
6253 $ENV{$k} = $UNCLEAN_ENV{$k};
6255 undef(%UNCLEAN_ENV);
6259 =head2 progress_callback
6261 Never called directly, but useful for passing to &http_download to print
6262 out progress of an HTTP request.
6265 sub progress_callback
6267 if (defined(&theme_progress_callback)) {
6268 # Call the theme override
6269 return &theme_progress_callback(@_);
6273 print $progress_callback_prefix;
6275 $progress_size = $_[1];
6276 $progress_step = int($_[1] / 10);
6277 print &text('progress_size', $progress_callback_url,
6278 $progress_size),"<br>\n";
6281 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6283 $last_progress_time = $last_progress_size = undef;
6285 elsif ($_[0] == 3) {
6287 my $sp = $progress_callback_prefix.(" " x 5);
6288 if ($progress_size) {
6289 # And we have a size to compare against
6290 my $st = int(($_[1] * 10) / $progress_size);
6291 my $time_now = time();
6292 if ($st != $progress_step ||
6293 $time_now - $last_progress_time > 60) {
6294 # Show progress every 10% or 60 seconds
6295 print $sp,&text('progress_data', $_[1], int($_[1]*100/$progress_size)),"<br>\n";
6296 $last_progress_time = $time_now;
6298 $progress_step = $st;
6301 # No total size .. so only show in 100k jumps
6302 if ($_[1] > $last_progress_size+100*1024) {
6303 print $sp,&text('progress_data2', $_[1]),"<br>\n";
6304 $last_progress_size = $_[1];
6308 elsif ($_[0] == 4) {
6309 # All done downloading
6310 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6312 elsif ($_[0] == 5) {
6313 # Got new location after redirect
6314 $progress_callback_url = $_[1];
6316 elsif ($_[0] == 6) {
6318 $progress_callback_url = $_[1];
6319 print &text('progress_incache', $progress_callback_url),"<br>\n";
6323 =head2 switch_to_remote_user
6325 Changes the user and group of the current process to that of the unix user
6326 with the same name as the current webmin login, or fails if there is none.
6327 This should be called by Usermin module scripts that only need to run with
6328 limited permissions.
6331 sub switch_to_remote_user
6333 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6335 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6336 &create_missing_homedir(\@remote_user_info);
6338 &switch_to_unix_user(\@remote_user_info);
6339 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6340 $ENV{'HOME'} = $remote_user_info[7];
6342 # Export global variables to caller
6343 if ($main::export_to_caller) {
6344 my ($callpkg) = caller();
6345 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6349 =head2 switch_to_unix_user(&user-details)
6351 Switches the current process to the UID and group ID from the given list
6352 of user details, which must be in the format returned by getpwnam.
6355 sub switch_to_unix_user
6358 if (!defined($uinfo->[0])) {
6359 # No username given, so just use given GID
6360 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6363 # Use all groups from user
6364 ($(, $)) = ( $uinfo->[3],
6365 "$uinfo->[3] ".join(" ", $uinfo->[3],
6366 &other_groups($uinfo->[0])) );
6369 POSIX::setuid($uinfo->[2]);
6371 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6372 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6376 =head2 eval_as_unix_user(username, &code)
6378 Runs some code fragment with the effective UID and GID switch to that
6379 of the given Unix user, so that file IO takes place with his permissions.
6383 sub eval_as_unix_user
6385 my ($user, $code) = @_;
6386 my @uinfo = getpwnam($user);
6387 if (!scalar(@uinfo)) {
6388 &error("eval_as_unix_user called with invalid user $user");
6390 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6394 local $main::error_must_die = 1;
6401 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6404 return wantarray ? @rv : $rv[0];
6407 =head2 create_user_config_dirs
6409 Creates per-user config directories and sets $user_config_directory and
6410 $user_module_config_directory to them. Also reads per-user module configs
6411 into %userconfig. This should be called by Usermin module scripts that need
6412 to store per-user preferences or other settings.
6415 sub create_user_config_dirs
6417 return if (!$gconfig{'userconfig'});
6418 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6419 return if (!@uinfo || !$uinfo[7]);
6420 &create_missing_homedir(\@uinfo);
6421 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6422 if (!-d $user_config_directory) {
6423 mkdir($user_config_directory, 0700) ||
6424 &error("Failed to create $user_config_directory : $!");
6425 if ($< == 0 && $uinfo[2]) {
6426 chown($uinfo[2], $uinfo[3], $user_config_directory);
6429 if (&get_module_name()) {
6430 $user_module_config_directory = $user_config_directory."/".
6432 if (!-d $user_module_config_directory) {
6433 mkdir($user_module_config_directory, 0700) ||
6434 &error("Failed to create $user_module_config_directory : $!");
6435 if ($< == 0 && $uinfo[2]) {
6436 chown($uinfo[2], $uinfo[3], $user_config_directory);
6440 &read_file_cached("$module_root_directory/defaultuconfig",
6442 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6443 &read_file_cached("$user_module_config_directory/config",
6447 # Export global variables to caller
6448 if ($main::export_to_caller) {
6449 my ($callpkg) = caller();
6450 foreach my $v ('$user_config_directory',
6451 '$user_module_config_directory', '%userconfig') {
6452 my ($vt, $vn) = split('', $v, 2);
6453 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6458 =head2 create_missing_homedir(&uinfo)
6460 If auto homedir creation is enabled, create one for this user if needed.
6461 For internal use only.
6464 sub create_missing_homedir
6467 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6468 # Use has no home dir .. make one
6469 system("mkdir -p ".quotemeta($uinfo->[7]));
6470 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6471 if ($gconfig{'create_homedir_perms'} ne '') {
6472 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6477 =head2 filter_javascript(text)
6479 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6480 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6483 sub filter_javascript
6486 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6487 $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;
6488 $rv =~ s/(javascript:)/x$1/gi;
6489 $rv =~ s/(vbscript:)/x$1/gi;
6493 =head2 resolve_links(path)
6495 Given a path that may contain symbolic links, returns the real path.
6501 $path =~ s/\/+/\//g;
6502 $path =~ s/\/$// if ($path ne "/");
6503 my @p = split(/\/+/, $path);
6505 for(my $i=0; $i<@p; $i++) {
6506 my $sofar = "/".join("/", @p[0..$i]);
6507 my $lnk = readlink($sofar);
6508 if ($lnk eq $sofar) {
6509 # Link to itself! Cannot do anything more really ..
6512 elsif ($lnk =~ /^\//) {
6513 # Link is absolute..
6514 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6518 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6524 =head2 simplify_path(path, bogus)
6526 Given a path, maybe containing elements ".." and "." , convert it to a
6527 clean, absolute form. Returns undef if this is not possible.
6535 my @bits = split(/\/+/, $dir);
6538 foreach my $b (@bits) {
6542 elsif ($b eq "..") {
6544 if (scalar(@fixedbits) == 0) {
6545 # Cannot! Already at root!
6552 push(@fixedbits, $b);
6555 return "/".join('/', @fixedbits);
6558 =head2 same_file(file1, file2)
6560 Returns 1 if two files are actually the same
6565 return 1 if ($_[0] eq $_[1]);
6566 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6567 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6568 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6569 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6570 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6571 return 0 if (!@stat1 || !@stat2);
6572 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6575 =head2 flush_webmin_caches
6577 Clears all in-memory and on-disk caches used by Webmin.
6580 sub flush_webmin_caches
6582 undef(%main::read_file_cache);
6583 undef(%main::acl_hash_cache);
6584 undef(%main::acl_array_cache);
6585 undef(%main::has_command_cache);
6586 undef(@main::list_languages_cache);
6587 undef($main::got_list_usermods_cache);
6588 undef(@main::list_usermods_cache);
6589 undef(%main::foreign_installed_cache);
6590 unlink("$config_directory/module.infos.cache");
6591 &get_all_module_infos();
6594 =head2 list_usermods
6596 Returns a list of additional module restrictions. For internal use in
6602 if (!$main::got_list_usermods_cache) {
6603 @main::list_usermods_cache = ( );
6605 open(USERMODS, "$config_directory/usermin.mods");
6607 if (/^([^:]+):(\+|-|):(.*)/) {
6608 push(@main::list_usermods_cache,
6609 [ $1, $2, [ split(/\s+/, $3) ] ]);
6613 $main::got_list_usermods_cache = 1;
6615 return @main::list_usermods_cache;
6618 =head2 available_usermods(&allmods, &usermods)
6620 Returns a list of modules that are available to the given user, based
6621 on usermod additional/subtractions. For internal use by Usermin only.
6624 sub available_usermods
6626 return @{$_[0]} if (!@{$_[1]});
6628 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6629 my @uinfo = @remote_user_info;
6630 @uinfo = getpwnam($remote_user) if (!@uinfo);
6631 foreach my $u (@{$_[1]}) {
6633 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6636 elsif ($u->[0] =~ /^\@(.*)$/) {
6637 # Check for group membership
6638 my @ginfo = getgrnam($1);
6639 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6640 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6642 elsif ($u->[0] =~ /^\//) {
6643 # Check users and groups in file
6645 open(USERFILE, $u->[0]);
6648 if ($_ eq $remote_user) {
6651 elsif (/^\@(.*)$/) {
6652 my @ginfo = getgrnam($1);
6654 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6655 &indexof($remote_user,
6656 split(/\s+/, $ginfo[3])) >= 0));
6663 if ($u->[1] eq "+") {
6664 map { $mods{$_}++ } @{$u->[2]};
6666 elsif ($u->[1] eq "-") {
6667 map { delete($mods{$_}) } @{$u->[2]};
6671 map { $mods{$_}++ } @{$u->[2]};
6675 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6678 =head2 get_available_module_infos(nocache)
6680 Returns a list of modules available to the current user, based on
6681 operating system support, access control and usermod restrictions. Useful
6682 in themes that need to display a list of modules the user can use.
6683 Each element of the returned array is a hash reference in the same format as
6684 returned by get_module_info.
6687 sub get_available_module_infos
6690 &read_acl(\%acl, \%uacl);
6691 my $risk = $gconfig{'risk_'.$base_remote_user};
6693 foreach my $minfo (&get_all_module_infos($_[0])) {
6694 next if (!&check_os_support($minfo));
6696 # Check module risk level
6697 next if ($risk ne 'high' && $minfo->{'risk'} &&
6698 $minfo->{'risk'} !~ /$risk/);
6702 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6703 !$acl{$base_remote_user,"*"});
6705 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6709 # Check usermod restrictions
6710 my @usermods = &list_usermods();
6711 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6712 &available_usermods(\@rv, \@usermods);
6714 # Check RBAC restrictions
6716 foreach my $m (@rv) {
6717 if (&supports_rbac($m->{'dir'}) &&
6718 &use_rbac_module_acl(undef, $m->{'dir'})) {
6719 local $rbacs = &get_rbac_module_acl($remote_user,
6727 # Module or system doesn't support RBAC
6728 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6734 if (defined(&theme_foreign_available)) {
6735 foreach my $m (@rbacrv) {
6736 if (&theme_foreign_available($m->{'dir'})) {
6745 # Check licence module vetos
6747 if ($main::licence_module) {
6748 foreach my $m (@themerv) {
6749 if (&foreign_call($main::licence_module,
6750 "check_module_licence", $m->{'dir'})) {
6762 =head2 get_visible_module_infos(nocache)
6764 Like get_available_module_infos, but excludes hidden modules from the list.
6765 Each element of the returned array is a hash reference in the same format as
6766 returned by get_module_info.
6769 sub get_visible_module_infos
6772 my $pn = &get_product_name();
6773 return grep { !$_->{'hidden'} &&
6774 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6777 =head2 get_visible_modules_categories(nocache)
6779 Returns a list of Webmin module categories, each of which is a hash ref
6780 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6781 of modules in the category, in the format returned by get_module_info.
6782 Un-used modules are automatically assigned to the 'unused' category, and
6783 those with no category are put into 'others'.
6786 sub get_visible_modules_categories
6789 my @mods = &get_visible_module_infos($nocache);
6791 if (&get_product_name() eq 'webmin') {
6792 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6793 @mods = grep { $_->{'installed'} ne '0' } @mods;
6795 my %cats = &list_categories(\@mods);
6797 foreach my $c (keys %cats) {
6798 my $cat = { 'code' => $c || 'other',
6799 'desc' => $cats{$c} };
6800 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6803 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6804 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6806 # Add un-installed modules in magic category
6807 my $cat = { 'code' => 'unused',
6808 'desc' => $text{'main_unused'},
6810 'modules' => \@unmods };
6816 =head2 is_under_directory(directory, file)
6818 Returns 1 if the given file is under the specified directory, 0 if not.
6819 Symlinks are taken into account in the file to find it's 'real' location.
6822 sub is_under_directory
6824 my ($dir, $file) = @_;
6825 return 1 if ($dir eq "/");
6826 return 0 if ($file =~ /\.\./);
6827 my $ld = &resolve_links($dir);
6829 return &is_under_directory($ld, $file);
6831 my $lp = &resolve_links($file);
6833 return &is_under_directory($dir, $lp);
6835 return 0 if (length($file) < length($dir));
6836 return 1 if ($dir eq $file);
6838 return substr($file, 0, length($dir)) eq $dir;
6841 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6843 Given an absolute URL, returns the host, port, page and ssl flag components.
6844 Relative URLs can also be parsed, if the base information is provided.
6849 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6851 my $ssl = $1 eq 'https';
6852 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6858 elsif ($_[0] =~ /^\/\S*$/) {
6859 # A relative to the server URL
6860 return ($_[1], $_[2], $_[0], $_[4]);
6863 # A relative to the directory URL
6865 $page =~ s/[^\/]+$//;
6866 return ($_[1], $_[2], $page.$_[0], $_[4]);
6870 =head2 check_clicks_function
6872 Returns HTML for a JavaScript function called check_clicks that returns
6873 true when first called, but false subsequently. Useful on onClick for
6874 critical buttons. Deprecated, as this method of preventing duplicate actions
6878 sub check_clicks_function
6883 function check_clicks(form)
6890 for(i=0; i<form.length; i++)
6891 form.elements[i].disabled = true;
6900 =head2 load_entities_map
6902 Returns a hash ref containing mappings between HTML entities (like ouml) and
6903 ascii values (like 246). Mainly for internal use.
6906 sub load_entities_map
6908 if (!defined(%entities_map_cache)) {
6910 open(EMAP, "$root_directory/entities_map.txt");
6912 if (/^(\d+)\s+(\S+)/) {
6913 $entities_map_cache{$2} = $1;
6918 return \%entities_map_cache;
6921 =head2 entities_to_ascii(string)
6923 Given a string containing HTML entities like ö and 7, replace them
6924 with their ASCII equivalents.
6927 sub entities_to_ascii
6930 my $emap = &load_entities_map();
6931 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6932 $str =~ s/&#(\d+);/chr($1)/ge;
6936 =head2 get_product_name
6938 Returns either 'webmin' or 'usermin', depending on which program the current
6939 module is in. Useful for modules that can be installed into either.
6942 sub get_product_name
6944 return $gconfig{'product'} if (defined($gconfig{'product'}));
6945 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6950 Returns the character set for the current language, such as iso-8859-1.
6955 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6956 $current_lang_info->{'charset'} ?
6957 $current_lang_info->{'charset'} : $default_charset;
6961 =head2 get_display_hostname
6963 Returns the system's hostname for UI display purposes. This may be different
6964 from the actual hostname if you administrator has configured it so in the
6965 Webmin Configuration module.
6968 sub get_display_hostname
6970 if ($gconfig{'hostnamemode'} == 0) {
6971 return &get_system_hostname();
6973 elsif ($gconfig{'hostnamemode'} == 3) {
6974 return $gconfig{'hostnamedisplay'};
6977 my $h = $ENV{'HTTP_HOST'};
6979 if ($gconfig{'hostnamemode'} == 2) {
6980 $h =~ s/^(www|ftp|mail)\.//i;
6986 =head2 save_module_config([&config], [modulename])
6988 Saves the configuration for some module. The config parameter is an optional
6989 hash reference of names and values to save, which defaults to the global
6990 %config hash. The modulename parameter is the module to update the config
6991 file, which defaults to the current module.
6994 sub save_module_config
6996 my $c = $_[0] || { &get_module_variable('%config') };
6997 my $m = defined($_[1]) ? $_[1] : &get_module_name();
6998 &write_file("$config_directory/$m/config", $c);
7001 =head2 save_user_module_config([&config], [modulename])
7003 Saves the user's Usermin preferences for some module. The config parameter is
7004 an optional hash reference of names and values to save, which defaults to the
7005 global %userconfig hash. The modulename parameter is the module to update the
7006 config file, which defaults to the current module.
7009 sub save_user_module_config
7011 my $c = $_[0] || { &get_module_variable('%userconfig') };
7012 my $m = $_[1] || &get_module_name();
7013 my $ucd = $user_config_directory;
7015 my @uinfo = @remote_user_info ? @remote_user_info
7016 : getpwnam($remote_user);
7017 return if (!@uinfo || !$uinfo[7]);
7018 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7020 &write_file("$ucd/$m/config", $c);
7023 =head2 nice_size(bytes, [min])
7025 Converts a number of bytes into a number followed by a suffix like GB, MB
7026 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7027 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7032 my ($units, $uname);
7033 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7034 $units = 1024*1024*1024*1024;
7037 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7038 $units = 1024*1024*1024;
7041 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7045 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7053 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7055 return $sz." ".$uname;
7058 =head2 get_perl_path
7060 Returns the path to Perl currently in use, such as /usr/bin/perl.
7065 if (open(PERL, "$config_directory/perl-path")) {
7071 return $^X if (-x $^X);
7072 return &has_command("perl");
7075 =head2 get_goto_module([&mods])
7077 Returns the details of a module that the current user should be re-directed
7078 to after logging in, or undef if none. Useful for themes.
7083 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7084 if ($gconfig{'gotomodule'}) {
7085 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7086 return $goto if ($goto);
7088 if (@mods == 1 && $gconfig{'gotoone'}) {
7094 =head2 select_all_link(field, form, [text])
7096 Returns HTML for a 'Select all' link that uses Javascript to select
7097 multiple checkboxes with the same name. The parameters are :
7099 =item field - Name of the checkbox inputs.
7101 =item form - Index of the form on the page.
7103 =item text - Message for the link, defaulting to 'Select all'.
7108 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7109 my ($field, $form, $text) = @_;
7111 $text ||= $text{'ui_selall'};
7112 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7115 =head2 select_invert_link(field, form, text)
7117 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7118 selection on multiple checkboxes with the same name. The parameters are :
7120 =item field - Name of the checkbox inputs.
7122 =item form - Index of the form on the page.
7124 =item text - Message for the link, defaulting to 'Invert selection'.
7127 sub select_invert_link
7129 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7130 my ($field, $form, $text) = @_;
7132 $text ||= $text{'ui_selinv'};
7133 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7136 =head2 select_rows_link(field, form, text, &rows)
7138 Returns HTML for a link that uses Javascript to select rows with particular
7139 values for their checkboxes. The parameters are :
7141 =item field - Name of the checkbox inputs.
7143 =item form - Index of the form on the page.
7145 =item text - Message for the link, de
7147 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7150 sub select_rows_link
7152 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7153 my ($field, $form, $text, $rows) = @_;
7155 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7156 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7157 $js .= "return false;";
7158 return "<a href='#' onClick='$js'>$text</a>";
7161 =head2 check_pid_file(file)
7163 Given a pid file, returns the PID it contains if the process is running.
7168 open(PIDFILE, $_[0]) || return undef;
7169 my $pid = <PIDFILE>;
7171 $pid =~ /^\s*(\d+)/ || return undef;
7172 kill(0, $1) || return undef;
7178 Return the local os-specific library name to this module. For internal use only.
7183 my $mn = &get_module_name();
7184 my $md = &module_root_directory($mn);
7185 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7186 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7188 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7189 return "$mn-$gconfig{'os_type'}-lib.pl";
7191 elsif (-r "$md/$mn-generic-lib.pl") {
7192 return "$mn-generic-lib.pl";
7199 =head2 module_root_directory(module)
7201 Given a module name, returns its root directory. On a typical Webmin install,
7202 all modules are under the same directory - but it is theoretically possible to
7206 sub module_root_directory
7208 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7209 if (@root_directories > 1) {
7210 foreach my $r (@root_directories) {
7216 return "$root_directories[0]/$d";
7219 =head2 list_mime_types
7221 Returns a list of all known MIME types and their extensions, as a list of hash
7222 references with keys :
7224 =item type - The MIME type, like text/plain.
7226 =item exts - A list of extensions, like .doc and .avi.
7228 =item desc - A human-readable description for the MIME type.
7233 if (!@list_mime_types_cache) {
7235 open(MIME, "$root_directory/mime.types");
7239 if (s/#\s*(.*)$//g) {
7242 my ($type, @exts) = split(/\s+/);
7244 push(@list_mime_types_cache, { 'type' => $type,
7251 return @list_mime_types_cache;
7254 =head2 guess_mime_type(filename, [default])
7256 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7257 The optional default parameter sets a default type of use if none is found,
7258 which defaults to application/octet-stream.
7263 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7265 foreach my $t (&list_mime_types()) {
7266 foreach my $e (@{$t->{'exts'}}) {
7267 return $t->{'type'} if (lc($e) eq lc($ext));
7271 return @_ > 1 ? $_[1] : "application/octet-stream";
7274 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7276 Opens a file handle for writing to a temporary file, which will only be
7277 renamed over the real file when the handle is closed. This allows critical
7278 files like /etc/shadow to be updated safely, even if writing fails part way
7279 through due to lack of disk space. The parameters are :
7281 =item handle - File handle to open, as you would use in Perl's open function.
7283 =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.
7285 =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 $! with the error code.
7287 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7289 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7295 # Just getting a temp file
7296 if (!defined($main::open_tempfiles{$_[0]})) {
7297 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7298 my $dir = $1 || "/";
7299 my $tmp = "$dir/$2.webmintmp.$$";
7300 $main::open_tempfiles{$_[0]} = $tmp;
7301 push(@main::temporary_files, $tmp);
7303 return $main::open_tempfiles{$_[0]};
7307 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7308 $fh = &callers_package($fh);
7310 my %gaccess = &get_module_acl(undef, "");
7311 my $db = $gconfig{'debug_what_write'};
7312 if ($file =~ /\r|\n|\0/) {
7313 if ($noerror) { return 0; }
7314 else { &error("Filename contains invalid characters"); }
7316 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7317 # Read-only mode .. veto all writes
7318 print STDERR "vetoing write to $file\n";
7319 return open($fh, ">$null_file");
7321 elsif ($file =~ /^(>|>>|)nul$/i) {
7322 # Write to Windows null device
7323 &webmin_debug_log($1 eq ">" ? "WRITE" :
7324 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7326 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7327 # Writes to /dev/null or TTYs don't need to be handled
7328 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7329 return open($fh, $file);
7331 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7332 &webmin_debug_log("WRITE", $1) if ($db);
7333 # Over-writing a file, via a temp file
7335 $file = &translate_filename($file);
7337 # Open the link target instead
7338 $file = &resolve_links($file);
7341 # Cannot open a directory!
7342 if ($noerror) { return 0; }
7343 else { &error("Cannot write to directory $file"); }
7345 my $tmp = &open_tempfile($file);
7346 my $ex = open($fh, ">$tmp");
7347 if (!$ex && $! =~ /permission/i) {
7348 # Could not open temp file .. try opening actual file
7350 $ex = open($fh, ">$file");
7351 delete($main::open_tempfiles{$file});
7354 $main::open_temphandles{$fh} = $file;
7357 if (!$ex && !$noerror) {
7358 &error(&text("efileopen", $file, $!));
7362 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7363 # Just writing direct to a file
7364 &webmin_debug_log("WRITE", $1) if ($db);
7366 $file = &translate_filename($file);
7367 my @old_attributes = &get_clear_file_attributes($file);
7368 my $ex = open($fh, ">$file");
7369 &reset_file_attributes($file, \@old_attributes);
7370 $main::open_temphandles{$fh} = $file;
7371 if (!$ex && !$noerror) {
7372 &error(&text("efileopen", $file, $!));
7377 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7378 # Appending to a file .. nothing special to do
7379 &webmin_debug_log("APPEND", $1) if ($db);
7381 $file = &translate_filename($file);
7382 my @old_attributes = &get_clear_file_attributes($file);
7383 my $ex = open($fh, ">>$file");
7384 &reset_file_attributes($file, \@old_attributes);
7385 $main::open_temphandles{$fh} = $file;
7386 if (!$ex && !$noerror) {
7387 &error(&text("efileopen", $file, $!));
7392 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7393 # Read mode .. nothing to do here
7394 &webmin_debug_log("READ", $file) if ($db);
7395 $file = &translate_filename($file);
7396 return open($fh, $file);
7398 elsif ($file eq ">" || $file eq ">>") {
7399 my ($package, $filename, $line) = caller;
7400 if ($noerror) { return 0; }
7401 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7404 my ($package, $filename, $line) = caller;
7405 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7410 =head2 close_tempfile(file|handle)
7412 Copies a temp file to the actual file, assuming that all writes were
7413 successful. The handle must have been one passed to open_tempfile.
7419 my $fh = &callers_package($_[0]);
7421 if (defined($file = $main::open_temphandles{$fh})) {
7423 close($fh) || &error(&text("efileclose", $file, $!));
7424 delete($main::open_temphandles{$fh});
7425 return &close_tempfile($file);
7427 elsif (defined($main::open_tempfiles{$_[0]})) {
7429 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7430 my @st = stat($_[0]);
7431 if (&is_selinux_enabled() && &has_command("chcon")) {
7432 # Set original security context
7433 system("chcon --reference=".quotemeta($_[0]).
7434 " ".quotemeta($main::open_tempfiles{$_[0]}).
7435 " >/dev/null 2>&1");
7437 my @old_attributes = &get_clear_file_attributes($_[0]);
7438 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7440 # Set original permissions and ownership
7441 chmod($st[2], $_[0]);
7442 chown($st[4], $st[5], $_[0]);
7444 &reset_file_attributes($_[0], \@old_attributes);
7445 delete($main::open_tempfiles{$_[0]});
7446 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7447 if ($main::open_templocks{$_[0]}) {
7448 &unlock_file($_[0]);
7449 delete($main::open_templocks{$_[0]});
7454 # Must be closing a handle not associated with a file
7460 =head2 print_tempfile(handle, text, ...)
7462 Like the normal print function, but calls &error on failure. Useful when
7463 combined with open_tempfile, to ensure that a criticial file is never
7464 only partially written.
7469 my ($fh, @args) = @_;
7470 $fh = &callers_package($fh);
7471 (print $fh @args) || &error(&text("efilewrite",
7472 $main::open_temphandles{$fh} || $fh, $!));
7475 =head2 is_selinux_enabled
7477 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7480 sub is_selinux_enabled
7482 if (!defined($main::selinux_enabled_cache)) {
7484 if ($gconfig{'os_type'} !~ /-linux$/) {
7485 # Not on linux, so no way
7486 $main::selinux_enabled_cache = 0;
7488 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7489 # Use global config file
7490 $main::selinux_enabled_cache =
7491 $seconfig{'SELINUX'} eq 'disabled' ||
7492 !$seconfig{'SELINUX'} ? 0 : 1;
7495 # Use selinuxenabled command
7496 #$selinux_enabled_cache =
7497 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7498 $main::selinux_enabled_cache = 0;
7501 return $main::selinux_enabled_cache;
7504 =head2 get_clear_file_attributes(file)
7506 Finds file attributes that may prevent writing, clears them and returns them
7507 as a list. May call error. Mainly for internal use by open_tempfile and
7511 sub get_clear_file_attributes
7515 if ($gconfig{'chattr'}) {
7516 # Get original immutable bit
7517 my $out = &backquote_command(
7518 "lsattr ".quotemeta($file)." 2>/dev/null");
7520 $out =~ s/\s\S+\n//;
7521 @old_attributes = grep { $_ ne '-' } split(//, $out);
7523 if (&indexof("i", @old_attributes) >= 0) {
7524 my $err = &backquote_logged(
7525 "chattr -i ".quotemeta($file)." 2>&1");
7527 &error("Failed to remove immutable bit on ".
7532 return @old_attributes;
7535 =head2 reset_file_attributes(file, &attributes)
7537 Put back cleared attributes on some file. May call error. Mainly for internal
7538 use by close_tempfile.
7541 sub reset_file_attributes
7543 my ($file, $old_attributes) = @_;
7544 if (&indexof("i", @$old_attributes) >= 0) {
7545 my $err = &backquote_logged(
7546 "chattr +i ".quotemeta($file)." 2>&1");
7548 &error("Failed to restore immutable bit on ".
7554 =head2 cleanup_tempnames
7556 Remove all temporary files generated using transname. Typically only called
7557 internally when a Webmin script exits.
7560 sub cleanup_tempnames
7562 foreach my $t (@main::temporary_files) {
7565 @main::temporary_files = ( );
7568 =head2 open_lock_tempfile([handle], file, [no-error])
7570 Returns a temporary file for writing to some actual file, and also locks it.
7571 Effectively the same as calling lock_file and open_tempfile on the same file,
7572 but calls the unlock for you automatically when it is closed.
7575 sub open_lock_tempfile
7577 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7578 $fh = &callers_package($fh);
7579 my $lockfile = $file;
7580 $lockfile =~ s/^[^\/]*//;
7581 if ($lockfile =~ /^\//) {
7582 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7584 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7589 $main::end_exit_status ||= $?;
7590 if ($$ == $main::initial_process_id) {
7591 # Exiting from initial process
7592 &cleanup_tempnames();
7593 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7594 $main::debug_log_start_module eq &get_module_name()) {
7595 my $len = time() - $main::debug_log_start_time;
7596 &webmin_debug_log("STOP", "runtime=$len");
7597 $main::debug_log_start_time = 0;
7599 if (!$ENV{'SCRIPT_NAME'} &&
7600 $main::initial_module_name eq &get_module_name()) {
7601 # In a command-line script - call the real exit, so that the
7602 # exit status gets properly propogated. In some cases this
7603 # was not happening.
7604 exit($main::end_exit_status);
7609 =head2 month_to_number(month)
7611 Converts a month name like feb to a number like 1.
7616 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7619 =head2 number_to_month(number)
7621 Converts a number like 1 to a month name like Feb.
7626 return ucfirst($number_to_month_map{$_[0]});
7629 =head2 get_rbac_module_acl(user, module)
7631 Returns a hash reference of RBAC overrides ACLs for some user and module.
7632 May return undef if none exist (indicating access denied), or the string *
7633 if full access is granted.
7636 sub get_rbac_module_acl
7638 my ($user, $mod) = @_;
7639 eval "use Authen::SolarisRBAC";
7640 return undef if ($@);
7643 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7644 # Automagic webmin.modulename.admin authorization exists .. allow access
7646 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7647 %rv = ( 'noconfig' => 1 );
7654 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7658 my ($auths, $acls) = split(/\s+/, $_);
7659 my @auths = split(/,/, $auths);
7661 my ($merge) = ($acls =~ s/^\+//);
7663 if ($auths eq "*") {
7664 # These ACLs apply to all RBAC users.
7665 # Only if there is some that match a specific authorization
7666 # later will they be used though.
7669 # Check each of the RBAC authorizations
7670 foreach my $a (@auths) {
7671 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7676 $foundany++ if ($gotall);
7679 # Found an RBAC authorization - return the ACLs
7680 return "*" if ($acls eq "*");
7681 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7683 # Just add to current set
7684 foreach my $a (keys %acl) {
7695 return !$foundany ? undef : %rv ? \%rv : undef;
7698 =head2 supports_rbac([module])
7700 Returns 1 if RBAC client support is available, such as on Solaris.
7705 return 0 if ($gconfig{'os_type'} ne 'solaris');
7706 eval "use Authen::SolarisRBAC";
7709 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7714 =head2 use_rbac_module_acl(user, module)
7716 Returns 1 if some user should use RBAC to get permissions for a module
7719 sub use_rbac_module_acl
7721 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7722 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7723 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7724 my %access = &get_module_acl($u, $m, 1);
7725 return $access{'rbac'} ? 1 : 0;
7728 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7730 Runs some command, possibly feeding it input and capturing output to the
7731 give files or scalar references. The parameters are :
7733 =item command - Full command to run, possibly including shell meta-characters.
7735 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7737 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7739 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7741 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7743 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7748 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7749 if (&is_readonly_mode() && !$safe) {
7750 print STDERR "Vetoing command $_[0]\n";
7754 $cmd = &translate_command($cmd);
7756 # Use ` operator where possible
7757 if (!$stdin && ref($stdout) && !$stderr) {
7758 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7759 $$stdout = `$cmd 2>$null_file`;
7762 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7763 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7764 $$stdout = `$cmd 2>&1`;
7767 elsif (!$stdin && !$stdout && !$stderr) {
7768 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7769 return system("$cmd >$null_file 2>$null_file <$null_file");
7771 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7774 $| = 1; # needed on some systems to flush before forking
7775 pipe(EXECSTDINr, EXECSTDINw);
7776 pipe(EXECSTDOUTr, EXECSTDOUTw);
7777 pipe(EXECSTDERRr, EXECSTDERRw);
7779 if (!($pid = fork())) {
7783 open(STDIN, "<&EXECSTDINr");
7784 open(STDOUT, ">&EXECSTDOUTw");
7785 if (ref($stderr) && $stderr eq $stdout) {
7786 open(STDERR, ">&EXECSTDOUTw");
7789 open(STDERR, ">&EXECSTDERRw");
7796 my $fullcmd = "($cmd)";
7797 if ($stdin && !ref($stdin)) {
7798 $fullcmd .= " <$stdin";
7800 if ($stdout && !ref($stdout)) {
7801 $fullcmd .= " >$stdout";
7803 if ($stderr && !ref($stderr)) {
7804 if ($stderr eq $stdout) {
7805 $fullcmd .= " 2>&1";
7808 $fullcmd .= " 2>$stderr";
7811 if ($gconfig{'os_type'} eq 'windows') {
7815 exec("/bin/sh", "-c", $fullcmd);
7817 print "Exec failed : $!\n";
7824 # Feed input and capture output
7826 if ($stdin && ref($stdin)) {
7827 print EXECSTDINw $$stdin;
7830 if ($stdout && ref($stdout)) {
7832 while(<EXECSTDOUTr>) {
7837 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7839 while(<EXECSTDERRr>) {
7850 =head2 open_readfile(handle, file)
7852 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7853 exactly the same as Perl's open function.
7858 my ($fh, $file) = @_;
7859 $fh = &callers_package($fh);
7860 my $realfile = &translate_filename($file);
7861 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7862 return open($fh, "<".$realfile);
7865 =head2 open_execute_command(handle, command, output?, safe?)
7867 Runs some command, with the specified file handle set to either write to it if
7868 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7869 indicates if the command modifies the state of the system or not.
7872 sub open_execute_command
7874 my ($fh, $cmd, $mode, $safe) = @_;
7875 $fh = &callers_package($fh);
7876 my $realcmd = &translate_command($cmd);
7877 if (&is_readonly_mode() && !$safe) {
7878 # Don't actually run it
7879 print STDERR "vetoing command $cmd\n";
7882 return open($fh, ">$null_file");
7885 return open($fh, $null_file);
7889 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7890 if ($gconfig{'debug_what_cmd'});
7892 return open($fh, "| $cmd");
7894 elsif ($mode == 1) {
7895 return open($fh, "$cmd 2>$null_file |");
7897 elsif ($mode == 2) {
7898 return open($fh, "$cmd 2>&1 |");
7902 =head2 translate_filename(filename)
7904 Applies all relevant registered translation functions to a filename. Mostly
7905 for internal use, and typically does nothing.
7908 sub translate_filename
7910 my ($realfile) = @_;
7911 my @funcs = grep { $_->[0] eq &get_module_name() ||
7912 !defined($_->[0]) } @main::filename_callbacks;
7913 foreach my $f (@funcs) {
7915 $realfile = &$func($realfile, @{$f->[2]});
7920 =head2 translate_command(filename)
7922 Applies all relevant registered translation functions to a command. Mostly
7923 for internal use, and typically does nothing.
7926 sub translate_command
7929 my @funcs = grep { $_->[0] eq &get_module_name() ||
7930 !defined($_->[0]) } @main::command_callbacks;
7931 foreach my $f (@funcs) {
7933 $realcmd = &$func($realcmd, @{$f->[2]});
7938 =head2 register_filename_callback(module|undef, &function, &args)
7940 Registers some function to be called when the specified module (or all
7941 modules) tries to open a file for reading and writing. The function must
7942 return the actual file to open. This allows you to override which files
7943 other code actually operates on, via the translate_filename function.
7946 sub register_filename_callback
7948 my ($mod, $func, $args) = @_;
7949 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7952 =head2 register_command_callback(module|undef, &function, &args)
7954 Registers some function to be called when the specified module (or all
7955 modules) tries to execute a command. The function must return the actual
7956 command to run. This allows you to override which commands other other code
7957 actually runs, via the translate_command function.
7960 sub register_command_callback
7962 my ($mod, $func, $args) = @_;
7963 push(@main::command_callbacks, [ $mod, $func, $args ]);
7966 =head2 capture_function_output(&function, arg, ...)
7968 Captures output that some function prints to STDOUT, and returns it. Useful
7969 for functions outside your control that print data when you really want to
7970 manipulate it before output.
7973 sub capture_function_output
7975 my ($func, @args) = @_;
7976 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
7977 my $old = select(SOCKET1);
7978 my @rv = &$func(@args);
7987 return wantarray ? ($out, \@rv) : $out;
7990 =head2 capture_function_output_tempfile(&function, arg, ...)
7992 Behaves the same as capture_function_output, but uses a temporary file
7993 to avoid buffer full problems.
7996 sub capture_function_output_tempfile
7998 my ($func, @args) = @_;
7999 my $temp = &transname();
8000 open(BUFFER, ">$temp");
8001 my $old = select(BUFFER);
8002 my @rv = &$func(@args);
8005 my $out = &read_file_contents($temp);
8006 &unlink_file($temp);
8007 return wantarray ? ($out, \@rv) : $out;
8010 =head2 modules_chooser_button(field, multiple, [form])
8012 Returns HTML for a button for selecting one or many Webmin modules.
8013 field - Name of the HTML field to place the module names into.
8014 multiple - Set to 1 if multiple modules can be selected.
8015 form - Index of the form on the page.
8018 sub modules_chooser_button
8020 return &theme_modules_chooser_button(@_)
8021 if (defined(&theme_modules_chooser_button));
8022 my $form = defined($_[2]) ? $_[2] : 0;
8023 my $w = $_[1] ? 700 : 500;
8025 if ($_[1] && $gconfig{'db_sizemodules'}) {
8026 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8028 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8029 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8031 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";
8034 =head2 substitute_template(text, &hash)
8036 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8037 the text replaces it with the value of the hash key foo. Also supports blocks
8038 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8039 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8042 sub substitute_template
8044 # Add some extra fixed parameters to the hash
8045 my %hash = %{$_[1]};
8046 $hash{'hostname'} = &get_system_hostname();
8047 $hash{'webmin_config'} = $config_directory;
8048 $hash{'webmin_etc'} = $config_directory;
8049 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8050 $hash{'webmin_var'} = $var_directory;
8052 # Add time-based parameters, for use in DNS
8053 $hash{'current_time'} = time();
8054 my @tm = localtime($hash{'current_time'});
8055 $hash{'current_year'} = $tm[5]+1900;
8056 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8057 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8058 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8059 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8060 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8062 # Actually do the substition
8064 foreach my $s (keys %hash) {
8065 next if ($s eq ''); # Prevent just $ from being subbed
8068 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8069 $rv =~ s/\$\Q$us\E/$sv/g;
8071 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8072 # and ${IF}..${ENDIF} with value
8073 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8074 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8076 # Replace $IF..$ELSE..$ENDIF block with first value,
8077 # and $IF..$ENDIF with value
8078 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8079 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8081 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8082 # matching, nothing if not
8083 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8084 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8086 # Replace $IFEQ..$ENDIFEQ block with first value if
8087 # matching, nothing if not
8088 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8089 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8092 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8093 # and ${IF}..${ENDIF} with nothing
8094 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8095 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8097 # Replace $IF..$ELSE..$ENDIF block with second value,
8098 # and $IF..$ENDIF with nothing
8099 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8100 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8102 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8103 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8104 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8108 # Now assume any $IF blocks whose variables are not present in the hash
8109 # evaluate to false.
8110 # $IF...$ELSE x $ENDIF => x
8111 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8112 # $IF...x...$ENDIF => (nothing)
8113 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8114 # ${var} => (nothing)
8115 $rv =~ s/\$\{[A-Z]+\}//g;
8120 =head2 running_in_zone
8122 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8123 disable module and features that are not appropriate, like those that modify
8124 mounted filesystems.
8129 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8130 $gconfig{'os_version'} < 10);
8131 my $zn = `zonename 2>$null_file`;
8133 return $zn && $zn ne "global";
8136 =head2 running_in_vserver
8138 Returns 1 if the current Webmin instance is running in a Linux VServer.
8139 Used to disable modules and features that are not appropriate.
8142 sub running_in_vserver
8144 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8147 open(MTAB, "/etc/mtab");
8149 my ($dev, $mp) = split(/\s+/, $_);
8150 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8159 =head2 running_in_xen
8161 Returns 1 if Webmin is running inside a Xen instance, by looking
8162 at /proc/xen/capabilities.
8167 return 0 if (!-r "/proc/xen/capabilities");
8168 my $cap = &read_file_contents("/proc/xen/capabilities");
8169 return $cap =~ /control_d/ ? 0 : 1;
8172 =head2 running_in_openvz
8174 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8175 at /proc/vz/veinfo for a non-zero line.
8178 sub running_in_openvz
8180 return 0 if (!-r "/proc/vz/veinfo");
8181 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8182 return 0 if (!$lref || !@$lref);
8183 foreach my $l (@$lref) {
8185 my @ll = split(/\s+/, $l);
8186 return 0 if ($ll[0] eq '0');
8191 =head2 list_categories(&modules, [include-empty])
8193 Returns a hash mapping category codes to names, including any custom-defined
8194 categories. The modules parameter must be an array ref of module hash objects,
8195 as returned by get_all_module_infos.
8200 my ($mods, $empty) = @_;
8201 my (%cats, %catnames);
8202 &read_file("$config_directory/webmin.catnames", \%catnames);
8203 foreach my $o (@lang_order_list) {
8204 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8209 foreach my $m (@$mods) {
8210 my $c = $m->{'category'};
8211 next if ($cats{$c});
8212 if (defined($catnames{$c})) {
8213 $cats{$c} = $catnames{$c};
8215 elsif ($text{"category_$c"}) {
8216 $cats{$c} = $text{"category_$c"};
8219 # try to get category name from module ..
8220 my %mtext = &load_language($m->{'dir'});
8221 if ($mtext{"category_$c"}) {
8222 $cats{$c} = $mtext{"category_$c"};
8225 $c = $m->{'category'} = "";
8226 $cats{$c} = $text{"category_$c"};
8233 =head2 is_readonly_mode
8235 Returns 1 if the current user is in read-only mode, and thus all writes
8236 to files and command execution should fail.
8239 sub is_readonly_mode
8241 if (!defined($main::readonly_mode_cache)) {
8242 my %gaccess = &get_module_acl(undef, "");
8243 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8245 return $main::readonly_mode_cache;
8248 =head2 command_as_user(user, with-env?, command, ...)
8250 Returns a command to execute some command as the given user, using the
8251 su statement. If on Linux, the /bin/sh shell is forced in case the user
8252 does not have a valid shell. If with-env is set to 1, the -s flag is added
8253 to the su command to read the user's .profile or .bashrc file.
8258 my ($user, $env, @args) = @_;
8259 my @uinfo = getpwnam($user);
8260 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8261 # User shell doesn't appear to be valid
8262 if ($gconfig{'os_type'} =~ /-linux$/) {
8263 # Use -s /bin/sh to force it
8264 $shellarg = " -s /bin/sh";
8266 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8267 $gconfig{'os_type'} eq 'solaris' &&
8268 $gconfig{'os_version'} >= 11 ||
8269 $gconfig{'os_type'} eq 'macos') {
8270 # Use -m and force /bin/sh
8271 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8275 my $rv = "su".($env ? " -" : "").$shellarg.
8276 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8280 =head2 list_osdn_mirrors(project, file)
8282 This function is now deprecated in favor of letting sourceforge just
8283 redirect to the best mirror, and now just returns their primary download URL.
8286 sub list_osdn_mirrors
8288 my ($project, $file) = @_;
8289 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8291 'mirror' => 'downloads' } );
8294 =head2 convert_osdn_url(url)
8296 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8297 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8298 to a real URL on the sourceforge download redirector.
8301 sub convert_osdn_url
8304 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8305 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8306 # Always use the Sourceforge mail download URL, which does
8307 # a location-based redirect for us
8308 my ($project, $file) = ($1, $2);
8309 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8311 return wantarray ? ( $url, 0 ) : $url;
8314 # Some other source .. don't change
8315 return wantarray ? ( $url, 2 ) : $url;
8319 =head2 get_current_dir
8321 Returns the directory the current process is running in.
8327 if ($gconfig{'os_type'} eq 'windows') {
8340 =head2 supports_users
8342 Returns 1 if the current OS supports Unix user concepts and functions like
8343 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8349 return $gconfig{'os_type'} ne 'windows';
8352 =head2 supports_symlinks
8354 Returns 1 if the current OS supports symbolic and hard links. This will not
8355 be the case on Windows.
8358 sub supports_symlinks
8360 return $gconfig{'os_type'} ne 'windows';
8363 =head2 quote_path(path)
8365 Returns a path with safe quoting for the current operating system.
8371 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8372 # Windows only supports "" style quoting
8376 return quotemeta($path);
8380 =head2 get_windows_root
8382 Returns the base windows system directory, like c:/windows.
8385 sub get_windows_root
8387 if ($ENV{'SystemRoot'}) {
8388 my $rv = $ENV{'SystemRoot'};
8393 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8397 =head2 read_file_contents(file)
8399 Given a filename, returns its complete contents as a string. Effectively
8400 the same as the Perl construct `cat file`.
8403 sub read_file_contents
8405 &open_readfile(FILE, $_[0]) || return undef;
8412 =head2 unix_crypt(password, salt)
8414 Performs Unix encryption on a password, using the built-in crypt function or
8415 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8416 must be either an already-hashed password, or a two-character alpha-numeric
8422 my ($pass, $salt) = @_;
8423 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8424 my $rv = eval "crypt(\$pass, \$salt)";
8426 return $rv if ($rv && !$@);
8427 eval "use Crypt::UnixCrypt";
8429 return Crypt::UnixCrypt::crypt($pass, $salt);
8432 &error("Failed to encrypt password : $err");
8436 =head2 split_quoted_string(string)
8438 Given a string like I<foo "bar baz" quux>, returns the array :
8442 sub split_quoted_string
8446 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8447 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8448 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8455 =head2 write_to_http_cache(url, file|&data)
8457 Updates the Webmin cache with the contents of the given file, possibly also
8458 clearing out old data. Mainly for internal use by http_download.
8461 sub write_to_http_cache
8463 my ($url, $file) = @_;
8464 return 0 if (!$gconfig{'cache_size'});
8466 # Don't cache downloads that look dynamic
8467 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8471 # Check if the current module should do caching
8472 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8473 # Caching all except some modules
8474 my @mods = split(/\s+/, $1);
8475 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8477 elsif ($gconfig{'cache_mods'}) {
8478 # Only caching some modules
8479 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8480 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8486 $size = length($$file);
8489 my @st = stat($file);
8493 if ($size > $gconfig{'cache_size'}) {
8494 # Bigger than the whole cache - so don't save it
8499 $cfile = "$main::http_cache_directory/$cfile";
8501 # See how much we have cached currently, clearing old files
8503 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8504 opendir(CACHEDIR, $main::http_cache_directory);
8505 foreach my $f (readdir(CACHEDIR)) {
8506 next if ($f eq "." || $f eq "..");
8507 my $path = "$main::http_cache_directory/$f";
8508 my @st = stat($path);
8509 if ($gconfig{'cache_days'} &&
8510 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8511 # This file is too old .. trash it
8516 push(@cached, [ $path, $st[7], $st[9] ]);
8520 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8521 while($total+$size > $gconfig{'cache_size'} && @cached) {
8522 # Cache is too big .. delete some files until the new one will fit
8523 unlink($cached[0]->[0]);
8524 $total -= $cached[0]->[1];
8528 # Finally, write out the new file
8530 &open_tempfile(CACHEFILE, ">$cfile");
8531 &print_tempfile(CACHEFILE, $$file);
8532 &close_tempfile(CACHEFILE);
8535 my ($ok, $err) = ©_source_dest($file, $cfile);
8541 =head2 check_in_http_cache(url)
8543 If some URL is in the cache and valid, return the filename for it. Mainly
8544 for internal use by http_download.
8547 sub check_in_http_cache
8550 return undef if (!$gconfig{'cache_size'});
8552 # Check if the current module should do caching
8553 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8554 # Caching all except some modules
8555 my @mods = split(/\s+/, $1);
8556 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8558 elsif ($gconfig{'cache_mods'}) {
8559 # Only caching some modules
8560 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8561 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8566 $cfile = "$main::http_cache_directory/$cfile";
8567 my @st = stat($cfile);
8568 return undef if (!@st || !$st[7]);
8569 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8574 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8579 =head2 supports_javascript
8581 Returns 1 if the current browser is assumed to support javascript.
8584 sub supports_javascript
8586 if (defined(&theme_supports_javascript)) {
8587 return &theme_supports_javascript();
8589 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8592 =head2 get_module_name
8594 Returns the name of the Webmin module that called this function. For internal
8595 use only by other API functions.
8600 return &get_module_variable('$module_name');
8603 =head2 get_module_variable(name, [ref])
8605 Returns the value of some variable which is set in the caller's context, if
8606 using the new WebminCore package. For internal use only.
8609 sub get_module_variable
8611 my ($v, $wantref) = @_;
8612 my $slash = $wantref ? "\\" : "";
8613 my $thispkg = &web_libs_package();
8614 if ($thispkg eq 'WebminCore') {
8615 my ($vt, $vn) = split('', $v, 2);
8617 for(my $i=0; ($callpkg) = caller($i); $i++) {
8618 last if ($callpkg ne $thispkg);
8620 return eval "${slash}${vt}${callpkg}::${vn}";
8622 return eval "${slash}${v}";
8625 =head2 clear_time_locale()
8627 Temporarily force the locale to C, until reset_time_locale is called. This is
8628 useful if your code is going to call C<strftime> from the POSIX package, and
8629 you want to ensure that the output is in a consistent format.
8632 sub clear_time_locale
8634 if ($main::clear_time_locale_count == 0) {
8637 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8638 POSIX::setlocale(POSIX::LC_TIME, "C");
8641 $main::clear_time_locale_count++;
8644 =head2 reset_time_locale()
8646 Revert the locale to whatever it was before clear_time_locale was called
8649 sub reset_time_locale
8651 if ($main::clear_time_locale_count == 1) {
8653 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8654 $main::clear_time_locale_old = undef;
8657 $main::clear_time_locale_count--;
8660 =head2 callers_package(filehandle)
8662 Convert a non-module filehandle like FOO to one qualified with the
8663 caller's caller's package, like fsdump::FOO. For internal use only.
8669 my $callpkg = (caller(1))[0];
8670 my $thispkg = &web_libs_package();
8671 if (!ref($fh) && $fh !~ /::/ &&
8672 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8673 $fh = $callpkg."::".$fh;
8678 =head2 web_libs_package()
8680 Returns the package this code is in. We can't always trust __PACKAGE__. For
8684 sub web_libs_package
8686 if ($called_from_webmin_core) {
8687 return "WebminCore";
8692 $done_web_lib_funcs = 1;