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+$//;
3742 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index_cgi) &&
3743 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3744 $unsafe_index_cgi) &&
3745 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3746 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3747 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3748 ($referer_site && $referer_site ne $http_host &&
3749 &indexof($referer_site, @referers) < 0 ||
3750 !$referer_site && $gconfig{'referers_none'}) &&
3751 !$trust_unknown_referers &&
3752 !&get_module_variable('$trust_unknown_referers')) {
3753 # Looks like a link from elsewhere .. show an error
3754 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3756 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3757 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3758 if ($referer_site) {
3760 print &text('referer_warn',
3761 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3763 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3764 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3767 # No referer info given
3768 print &text('referer_warn_unknown', $url),"<p>\n";
3769 print &text('referer_fix1u'),"<p>\n";
3770 print &text('referer_fix2u'),"<p>\n";
3774 &footer("/", $text{'index'});
3777 $main::no_referers_check++;
3778 $main::completed_referers_check++;
3780 # Call theme post-init
3781 if (defined(&theme_post_init_config)) {
3782 &theme_post_init_config(@_);
3785 # Record that we have done the calling library in this package
3786 my ($callpkg, $lib) = caller();
3788 $main::done_foreign_require{$callpkg,$lib} = 1;
3790 # If a licence checking is enabled, do it now
3791 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3792 &foreign_check($gconfig{'licence_module'}) &&
3793 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3794 my $oldpwd = &get_current_dir();
3795 $main::done_licence_module_check++;
3796 $main::licence_module = $gconfig{'licence_module'};
3797 &foreign_require($main::licence_module, "licence_check.pl");
3798 ($main::licence_status, $main::licence_message) =
3799 &foreign_call($main::licence_module, "check_licence");
3803 # Export global variables to caller
3804 if ($main::export_to_caller) {
3805 foreach my $v ('$config_file', '%gconfig', '$null_file',
3806 '$path_separator', '@root_directories',
3807 '$root_directory', '$module_name',
3808 '$base_remote_user', '$remote_user',
3809 '$module_config_directory', '$module_config_file',
3810 '%config', '@current_themes', '$current_theme',
3811 '@theme_root_directories', '$theme_root_directory',
3812 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3813 '$webmin_logfile', '$current_lang',
3814 '$current_lang_info', '@lang_order_list', '%text',
3815 '%module_info', '$module_root_directory') {
3816 my ($vt, $vn) = split('', $v, 2);
3817 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3824 =head2 load_language([module], [directory])
3826 Returns a hashtable mapping text codes to strings in the appropriate language,
3827 based on the $current_lang global variable, which is in turn set based on
3828 the Webmin user's selection. The optional module parameter tells the function
3829 which module to load strings for, and defaults to the calling module. The
3830 optional directory parameter can be used to load strings from a directory
3833 In regular module development you will never need to call this function
3834 directly, as init_config calls it for you, and places the module's strings
3835 into the %text hash.
3841 my $root = $root_directory;
3842 my $ol = $gconfig{'overlang'};
3843 my ($dir) = ($_[1] || "lang");
3845 # Read global lang files
3846 foreach my $o (@lang_order_list) {
3847 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3848 return () if (!$ok && $o eq $default_lang);
3851 foreach my $o (@lang_order_list) {
3852 &read_file_cached("$root/$ol/$o", \%text);
3855 &read_file_cached("$config_directory/custom-lang", \%text);
3858 # Read module's lang files
3859 my $mdir = &module_root_directory($_[0]);
3860 foreach my $o (@lang_order_list) {
3861 &read_file_cached("$mdir/$dir/$o", \%text);
3864 foreach $o (@lang_order_list) {
3865 &read_file_cached("$mdir/$ol/$o", \%text);
3868 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3870 foreach $k (keys %text) {
3871 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3874 if (defined(&theme_load_language)) {
3875 &theme_load_language(\%text, $_[0]);
3880 =head2 text_subs(string)
3882 Used internally by load_language to expand $code substitutions in language
3888 if (substr($_[0], 0, 8) eq "include:") {
3891 open(INCLUDE, substr($_[0], 8));
3899 my $t = $_[1]->{$_[0]};
3900 return defined($t) ? $t : '$'.$_[0];
3904 =head2 text(message, [substitute]+)
3906 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3907 the substitute parameters. This makes it easy to use strings with placeholders
3908 that get replaced with programmatically generated text. For example :
3910 print &text('index_hello', $remote_user),"<p>\n";
3915 my $t = &get_module_variable('%text', 1);
3916 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3917 for(my $i=1; $i<@_; $i++) {
3918 $rv =~ s/\$$i/$_[$i]/g;
3923 =head2 encode_base64(string)
3925 Encodes a string into base64 format, for use in MIME email or HTTP
3926 authorization headers.
3932 pos($_[0]) = 0; # ensure start at the beginning
3933 while ($_[0] =~ /(.{1,57})/gs) {
3934 $res .= substr(pack('u57', $1), 1)."\n";
3937 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3938 my $padding = (3 - length($_[0]) % 3) % 3;
3939 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3943 =head2 decode_base64(string)
3945 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3952 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3953 if (length($str) % 4) {
3956 $str =~ s/=+$//; # remove padding
3957 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3958 while ($str =~ /(.{1,60})/gs) {
3959 my $len = chr(32 + length($1)*3/4); # compute length byte
3960 $res .= unpack("u", $len . $1 ); # uudecode
3965 =head2 get_module_info(module, [noclone], [forcache])
3967 Returns a hash containg details of the given module. Some useful keys are :
3969 =item dir - The module directory, like sendmail.
3971 =item desc - Human-readable description, in the current users' language.
3973 =item version - Optional module version number.
3975 =item os_support - List of supported operating systems and versions.
3977 =item category - Category on Webmin's left menu, like net.
3982 return () if ($_[0] =~ /^\./);
3983 my (%rv, $clone, $o);
3984 my $mdir = &module_root_directory($_[0]);
3985 &read_file_cached("$mdir/module.info", \%rv) || return ();
3987 foreach $o (@lang_order_list) {
3988 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
3989 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
3991 if ($clone && !$_[1] && $config_directory) {
3992 $rv{'clone'} = $rv{'desc'};
3993 &read_file("$config_directory/$_[0]/clone", \%rv);
3996 my %module_categories;
3997 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
3998 my $pn = &get_product_name();
3999 if (defined($rv{'category_'.$pn})) {
4000 # Can override category for webmin/usermin
4001 $rv{'category'} = $rv{'category_'.$pn};
4003 $rv{'realcategory'} = $rv{'category'};
4004 $rv{'category'} = $module_categories{$_[0]}
4005 if (defined($module_categories{$_[0]}));
4007 # Apply description overrides
4008 $rv{'realdesc'} = $rv{'desc'};
4010 &read_file_cached("$config_directory/webmin.descs", \%descs);
4011 if ($descs{$_[0]." ".$current_lang}) {
4012 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4014 elsif ($descs{$_[0]}) {
4015 $rv{'desc'} = $descs{$_[0]};
4019 # Apply per-user description overridde
4020 my %gaccess = &get_module_acl(undef, "");
4021 if ($gaccess{'desc_'.$_[0]}) {
4022 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4026 if ($rv{'longdesc'}) {
4027 # All standard modules have an index.cgi
4028 $rv{'index_link'} = 'index.cgi';
4031 # Call theme-specific override function
4032 if (defined(&theme_get_module_info)) {
4033 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4039 =head2 get_all_module_infos(cachemode)
4041 Returns a list contains the information on all modules in this webmin
4042 install, including clones. Uses caching to reduce the number of module.info
4043 files that need to be read. Each element of the array is a hash reference
4044 in the same format as returned by get_module_info. The cache mode flag can be :
4045 0 = read and write, 1 = don't read or write, 2 = read only
4048 sub get_all_module_infos
4052 # Is the cache out of date? (ie. have any of the root's changed?)
4053 my $cache_file = "$config_directory/module.infos.cache";
4055 if (&read_file_cached($cache_file, \%cache)) {
4056 foreach my $r (@root_directories) {
4058 if ($st[9] != $cache{'mtime_'.$r}) {
4068 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4069 # Can use existing module.info cache
4071 foreach my $k (keys %cache) {
4072 if ($k =~ /^(\S+) (\S+)$/) {
4073 $mods{$1}->{$2} = $cache{$k};
4076 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4079 # Need to rebuild cache
4081 foreach my $r (@root_directories) {
4083 foreach my $m (readdir(DIR)) {
4084 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4085 my %minfo = &get_module_info($m, 0, 1);
4086 next if (!%minfo || !$minfo{'dir'});
4088 foreach $k (keys %minfo) {
4089 $cache{"${m} ${k}"} = $minfo{$k};
4094 $cache{'mtime_'.$r} = $st[9];
4096 $cache{'lang'} = $current_lang;
4097 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4100 # Override descriptions for modules for current user
4101 my %gaccess = &get_module_acl(undef, "");
4102 foreach my $m (@rv) {
4103 if ($gaccess{"desc_".$m->{'dir'}}) {
4104 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4108 # Apply installed flags
4110 &read_file_cached("$config_directory/installed.cache", \%installed);
4111 foreach my $m (@rv) {
4112 $m->{'installed'} = $installed{$m->{'dir'}};
4118 =head2 get_theme_info(theme)
4120 Returns a hash containing a theme's details, taken from it's theme.info file.
4121 Some useful keys are :
4123 =item dir - The theme directory, like blue-theme.
4125 =item desc - Human-readable description, in the current users' language.
4127 =item version - Optional module version number.
4129 =item os_support - List of supported operating systems and versions.
4134 return () if ($_[0] =~ /^\./);
4136 my $tdir = &module_root_directory($_[0]);
4137 &read_file("$tdir/theme.info", \%rv) || return ();
4138 foreach my $o (@lang_order_list) {
4139 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4145 =head2 list_languages
4147 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4148 Each is a hash reference with the following keys :
4150 =item lang - The short language code, like es for Spanish.
4152 =item desc - A human-readable description, in English.
4154 =item charset - An optional character set to use when displaying the language.
4156 =item titles - Set to 1 only if Webmin has title images for the language.
4158 =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.
4163 if (!@main::list_languages_cache) {
4166 open(LANG, "$root_directory/lang_list.txt");
4168 if (/^(\S+)\s+(.*)/) {
4169 my $l = { 'desc' => $2 };
4170 foreach $o (split(/,/, $1)) {
4171 if ($o =~ /^([^=]+)=(.*)$/) {
4175 $l->{'index'} = scalar(@rv);
4176 push(@main::list_languages_cache, $l);
4180 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4181 @main::list_languages_cache;
4183 return @main::list_languages_cache;
4186 =head2 read_env_file(file, &hash)
4188 Similar to Webmin's read_file function, but handles files containing shell
4189 environment variables formatted like :
4194 The file parameter is the full path to the file to read, and hash a Perl hash
4195 ref to read names and values into.
4201 &open_readfile(FILE, $_[0]) || return 0;
4204 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4205 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4206 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4214 =head2 write_env_file(file, &hash, [export])
4216 Writes out a hash to a file in name='value' format, suitable for use in a shell
4217 script. The parameters are :
4219 =item file - Full path for a file to write to
4221 =item hash - Hash reference of names and values to write.
4223 =item export - If set to 1, preceed each variable setting with the word 'export'.
4228 my $exp = $_[2] ? "export " : "";
4229 &open_tempfile(FILE, ">$_[0]");
4230 foreach my $k (keys %{$_[1]}) {
4231 my $v = $_[1]->{$k};
4232 if ($v =~ /^\S+$/) {
4233 &print_tempfile(FILE, "$exp$k=$v\n");
4236 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4239 &close_tempfile(FILE);
4242 =head2 lock_file(filename, [readonly], [forcefile])
4244 Lock a file for exclusive access. If the file is already locked, spin
4245 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4246 to work OK. The parameters are :
4248 =item filename - File or directory to lock.
4250 =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.
4252 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4257 my $realfile = &translate_filename($_[0]);
4258 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4259 my $no_lock = !&can_lock_file($realfile);
4260 my $lock_tries_count = 0;
4263 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4268 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4271 # Create the .lock file
4272 open(LOCKING, ">$realfile.lock") || return 0;
4273 my $lck = eval "flock(LOCKING, 2+4)";
4275 # Lock of lock file failed! Wait till later
4278 print LOCKING $$,"\n";
4279 eval "flock(LOCKING, 8)";
4282 $main::locked_file_list{$realfile} = int($_[1]);
4283 push(@main::temporary_files, "$realfile.lock");
4284 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4285 !&get_module_variable('$no_log_file_changes') &&
4287 # Grab a copy of this file for later diffing
4289 $main::locked_file_data{$realfile} = undef;
4291 $main::locked_file_type{$realfile} = 1;
4292 $main::locked_file_data{$realfile} = '';
4294 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4295 $main::locked_file_type{$realfile} = 2;
4296 $main::locked_file_data{$realfile} = $lnk;
4298 elsif (open(ORIGFILE, $realfile)) {
4299 $main::locked_file_type{$realfile} = 0;
4300 $main::locked_file_data{$realfile} = '';
4303 $main::locked_file_data{$realfile} .=$_;
4312 if ($lock_tries_count++ > 5*60) {
4313 # Give up after 5 minutes
4314 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4320 =head2 unlock_file(filename)
4322 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4323 file changes is enabled, then at unlock file a diff will be taken between the
4324 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4325 called. This can then be viewed in the Webmin Actions Log module.
4330 my $realfile = &translate_filename($_[0]);
4331 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4332 unlink("$realfile.lock") if (&can_lock_file($realfile));
4333 delete($main::locked_file_list{$realfile});
4334 if (exists($main::locked_file_data{$realfile})) {
4335 # Diff the new file with the old
4337 my $lnk = readlink($realfile);
4338 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4339 my $oldtype = $main::locked_file_type{$realfile};
4340 my $new = !defined($main::locked_file_data{$realfile});
4341 if ($new && !-e _) {
4342 # file doesn't exist, and never did! do nothing ..
4344 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4345 # is (or was) a directory ..
4346 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4347 push(@main::locked_file_diff,
4348 { 'type' => 'mkdir', 'object' => $realfile });
4350 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4351 push(@main::locked_file_diff,
4352 { 'type' => 'rmdir', 'object' => $realfile });
4355 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4356 # is (or was) a symlink ..
4357 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4358 push(@main::locked_file_diff,
4359 { 'type' => 'symlink', 'object' => $realfile,
4362 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4363 push(@main::locked_file_diff,
4364 { 'type' => 'unsymlink', 'object' => $realfile,
4365 'data' => $main::locked_file_data{$realfile} });
4367 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4368 push(@main::locked_file_diff,
4369 { 'type' => 'resymlink', 'object' => $realfile,
4374 # is a file, or has changed type?!
4375 my ($diff, $delete_file);
4376 my $type = "modify";
4378 open(NEWFILE, ">$realfile");
4383 if (!defined($main::locked_file_data{$realfile})) {
4386 open(ORIGFILE, ">$realfile.webminorig");
4387 print ORIGFILE $main::locked_file_data{$realfile};
4389 $diff = &backquote_command(
4390 "diff ".quotemeta("$realfile.webminorig")." ".
4391 quotemeta($realfile)." 2>/dev/null");
4392 push(@main::locked_file_diff,
4393 { 'type' => $type, 'object' => $realfile,
4394 'data' => $diff } ) if ($diff);
4395 unlink("$realfile.webminorig");
4396 unlink($realfile) if ($delete_file);
4399 if ($gconfig{'logfullfiles'}) {
4400 # Add file details to list of those to fully log
4401 $main::orig_file_data{$realfile} ||=
4402 $main::locked_file_data{$realfile};
4403 $main::orig_file_type{$realfile} ||=
4404 $main::locked_file_type{$realfile};
4407 delete($main::locked_file_data{$realfile});
4408 delete($main::locked_file_type{$realfile});
4412 =head2 test_lock(file)
4414 Returns 1 if some file is currently locked, 0 if not.
4419 my $realfile = &translate_filename($_[0]);
4420 return 0 if (!$_[0]);
4421 return 1 if (defined($main::locked_file_list{$realfile}));
4422 return 0 if (!&can_lock_file($realfile));
4424 if (open(LOCKING, "$realfile.lock")) {
4429 return $pid && kill(0, $pid);
4432 =head2 unlock_all_files
4434 Unlocks all files locked by the current script.
4437 sub unlock_all_files
4439 foreach $f (keys %main::locked_file_list) {
4444 =head2 can_lock_file(file)
4446 Returns 1 if some file should be locked, based on the settings in the
4447 Webmin Configuration module. For internal use by lock_file only.
4452 if (&is_readonly_mode()) {
4453 return 0; # never lock in read-only mode
4455 elsif ($gconfig{'lockmode'} == 0) {
4458 elsif ($gconfig{'lockmode'} == 1) {
4462 # Check if under any of the directories
4464 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4465 if (&same_file($d, $_[0]) ||
4466 &is_under_directory($d, $_[0])) {
4470 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4474 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4476 Log some action taken by a user. This is typically called at the end of a
4477 script, once all file changes are complete and all commands run. The
4480 =item action - A short code for the action being performed, like 'create'.
4482 =item type - A code for the type of object the action is performed to, like 'user'.
4484 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4486 =item params - A hash ref of additional information about the action.
4488 =item module - Name of the module in which the action was performed, which defaults to the current module.
4490 =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.
4492 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4494 =item client-ip - IP address of the browser that performed the action.
4499 return if (!$gconfig{'log'} || &is_readonly_mode());
4500 my $m = $_[4] ? $_[4] : &get_module_name();
4502 if ($gconfig{'logclear'}) {
4503 # check if it is time to clear the log
4504 my @st = stat("$webmin_logfile.time");
4505 my $write_logtime = 0;
4507 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4508 # clear logfile and all diff files
4509 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4510 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4511 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4512 unlink($webmin_logfile);
4519 if ($write_logtime) {
4520 open(LOGTIME, ">$webmin_logfile.time");
4521 print LOGTIME time(),"\n";
4526 # If an action script directory is defined, call the appropriate scripts
4527 if ($gconfig{'action_script_dir'}) {
4528 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4529 my ($basedir) = $gconfig{'action_script_dir'};
4531 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4534 opendir(DIR, $dir) or die "Can't open $dir: $!";
4535 while (defined($file = readdir(DIR))) {
4536 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4537 if (-x "$dir/$file") {
4538 # Call a script notifying it of the action
4540 $ENV{'ACTION_MODULE'} = &get_module_name();
4541 $ENV{'ACTION_ACTION'} = $_[0];
4542 $ENV{'ACTION_TYPE'} = $_[1];
4543 $ENV{'ACTION_OBJECT'} = $_[2];
4544 $ENV{'ACTION_SCRIPT'} = $script_name;
4545 foreach my $p (keys %param) {
4546 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4548 system("$dir/$file", @_,
4549 "<$null_file", ">$null_file", "2>&1");
4557 # should logging be done at all?
4558 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4559 split(/\s+/, $gconfig{'logusers'})) < 0);
4560 return if ($gconfig{'logmodules'} && &indexof($m,
4561 split(/\s+/, $gconfig{'logmodules'})) < 0);
4565 my @tm = localtime($now);
4566 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4567 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4568 $main::action_id_count++;
4569 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4570 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4571 $tm[2], $tm[1], $tm[0],
4572 $remote_user || '-',
4573 $main::session_id || '-',
4574 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4575 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4576 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4578 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4579 my $v = $_[3]->{$k};
4585 elsif (ref($v) eq 'ARRAY') {
4589 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4590 $line .= " $k='$vv'";
4594 foreach $vv (split(/\0/, $v)) {
4596 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4597 $line .= " $k='$vv'";
4600 $param{$k} = join(" ", @pv);
4602 open(WEBMINLOG, ">>$webmin_logfile");
4603 print WEBMINLOG $line,"\n";
4605 if ($gconfig{'logperms'}) {
4606 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4609 chmod(0600, $webmin_logfile);
4612 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4613 # Find and record the changes made to any locked files, or commands run
4615 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4616 foreach my $d (@main::locked_file_diff) {
4617 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4618 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4619 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4620 print DIFFLOG $d->{'data'};
4622 if ($d->{'input'}) {
4623 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4624 print DIFFLOG $d->{'input'};
4627 if ($gconfig{'logperms'}) {
4628 chmod(oct($gconfig{'logperms'}),
4629 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4630 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4634 @main::locked_file_diff = undef;
4636 if ($gconfig{'logfullfiles'}) {
4637 # Save the original contents of any modified files
4639 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4640 foreach my $f (keys %main::orig_file_data) {
4641 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4642 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4643 if (!defined($main::orig_file_type{$f})) {
4644 print ORIGLOG -1," ",$f,"\n";
4647 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4649 print ORIGLOG $main::orig_file_data{$f};
4651 if ($gconfig{'logperms'}) {
4652 chmod(oct($gconfig{'logperms'}),
4653 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4657 %main::orig_file_data = undef;
4658 %main::orig_file_type = undef;
4662 if ($gconfig{'logsyslog'}) {
4663 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4664 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4665 setlogsock("inet");';
4667 # Syslog module is installed .. try to convert to a
4668 # human-readable form
4670 my $mod = &get_module_name();
4671 my $mdir = module_root_directory($mod);
4672 if (-r "$mdir/log_parser.pl") {
4673 &foreign_require($mod, "log_parser.pl");
4675 foreach my $k (keys %{$_[3]}) {
4676 my $v = $_[3]->{$k};
4677 if (ref($v) eq 'ARRAY') {
4678 $params{$k} = join("\0", @$v);
4684 $msg = &foreign_call($mod, "parse_webmin_log",
4685 $remote_user, $script_name,
4686 $_[0], $_[1], $_[2], \%params);
4687 $msg =~ s/<[^>]*>//g; # Remove tags
4689 elsif ($_[0] eq "_config_") {
4690 my %wtext = &load_language("webminlog");
4691 $msg = $wtext{'search_config'};
4693 $msg ||= "$_[0] $_[1] $_[2]";
4694 my %info = &get_module_info($m);
4695 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4700 =head2 additional_log(type, object, data, [input])
4702 Records additional log data for an upcoming call to webmin_log, such
4703 as a command that was run or SQL that was executed. Typically you will never
4704 need to call this function directory.
4709 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4710 push(@main::locked_file_diff,
4711 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4712 'input' => $_[3] } );
4716 =head2 webmin_debug_log(type, message)
4718 Write something to the Webmin debug log. For internal use only.
4721 sub webmin_debug_log
4723 my ($type, $msg) = @_;
4724 return 0 if (!$main::opened_debug_log);
4725 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4727 my @tm = localtime($now);
4729 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4730 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4731 $tm[2], $tm[1], $tm[0],
4732 $remote_user || "-",
4733 $ENV{'REMOTE_HOST'} || "-",
4734 &get_module_name() || "-",
4737 seek(main::DEBUGLOG, 0, 2);
4738 print main::DEBUGLOG $line."\n";
4742 =head2 system_logged(command)
4744 Just calls the Perl system() function, but also logs the command run.
4749 if (&is_readonly_mode()) {
4750 print STDERR "Vetoing command $_[0]\n";
4753 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4754 my $cmd = join(" ", @realcmd);
4756 if ($cmd =~ s/(\s*&\s*)$//) {
4759 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4760 $cmd =~ s/^\((.*)\)\s*$/$1/;
4762 &additional_log('exec', undef, $cmd);
4763 return system(@realcmd);
4766 =head2 backquote_logged(command)
4768 Executes a command and returns the output (like `command`), but also logs it.
4771 sub backquote_logged
4773 if (&is_readonly_mode()) {
4775 print STDERR "Vetoing command $_[0]\n";
4778 my $realcmd = &translate_command($_[0]);
4781 if ($cmd =~ s/(\s*&\s*)$//) {
4784 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4785 $cmd =~ s/^\((.*)\)\s*$/$1/;
4787 &additional_log('exec', undef, $cmd);
4788 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4792 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4794 Runs some command, waiting at most the given number of seconds for it to
4795 complete, and returns the output. The maxlines parameter sets the number
4796 of lines of output to capture. The safe parameter should be set to 1 if the
4797 command is safe for read-only mode users to run.
4800 sub backquote_with_timeout
4802 my $realcmd = &translate_command($_[0]);
4803 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4804 if ($gconfig{'debug_what_cmd'});
4806 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4811 my $elapsed = time() - $start;
4812 last if ($elapsed > $_[1]);
4814 vec($rmask, fileno(OUT), 1) = 1;
4815 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4816 last if (!$sel || $sel < 0);
4818 last if (!defined($line));
4821 if ($_[3] && $linecount >= $_[3]) {
4826 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4830 return wantarray ? ($out, $timed_out) : $out;
4833 =head2 backquote_command(command, safe?)
4835 Executes a command and returns the output (like `command`), subject to
4836 command translation. The safe parameter should be set to 1 if the command
4837 is safe for read-only mode users to run.
4840 sub backquote_command
4842 if (&is_readonly_mode() && !$_[1]) {
4843 print STDERR "Vetoing command $_[0]\n";
4847 my $realcmd = &translate_command($_[0]);
4848 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4852 =head2 kill_logged(signal, pid, ...)
4854 Like Perl's built-in kill function, but also logs the fact that some process
4855 was killed. On Windows, falls back to calling process.exe to terminate a
4861 return scalar(@_)-1 if (&is_readonly_mode());
4862 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4863 if ($gconfig{'debug_what_procs'});
4864 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4865 if ($gconfig{'os_type'} eq 'windows') {
4866 # Emulate some kills with process.exe
4867 my $arg = $_[0] eq "KILL" ? "-k" :
4868 $_[0] eq "TERM" ? "-q" :
4869 $_[0] eq "STOP" ? "-s" :
4870 $_[0] eq "CONT" ? "-r" : undef;
4872 foreach my $p (@_[1..@_-1]) {
4874 $ok ||= kill($_[0], $p);
4877 &execute_command("process $arg $p");
4889 =head2 rename_logged(old, new)
4891 Re-names a file and logs the rename. If the old and new files are on different
4892 filesystems, calls mv or the Windows rename function to do the job.
4897 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4898 return &rename_file($_[0], $_[1]);
4901 =head2 rename_file(old, new)
4903 Renames a file or directory. If the old and new files are on different
4904 filesystems, calls mv or the Windows rename function to do the job.
4909 if (&is_readonly_mode()) {
4910 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4913 my $src = &translate_filename($_[0]);
4914 my $dst = &translate_filename($_[1]);
4915 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4916 if ($gconfig{'debug_what_ops'});
4917 my $ok = rename($src, $dst);
4918 if (!$ok && $! !~ /permission/i) {
4919 # Try the mv command, in case this is a cross-filesystem rename
4920 if ($gconfig{'os_type'} eq 'windows') {
4921 # Need to use rename
4922 my $out = &backquote_command("rename ".quotemeta($_[0]).
4923 " ".quotemeta($_[1])." 2>&1");
4925 $! = $out if (!$ok);
4929 my $out = &backquote_command("mv ".quotemeta($_[0]).
4930 " ".quotemeta($_[1])." 2>&1");
4932 $! = $out if (!$ok);
4938 =head2 symlink_logged(src, dest)
4940 Create a symlink, and logs it. Effectively does the same thing as the Perl
4947 my $rv = &symlink_file($_[0], $_[1]);
4948 &unlock_file($_[1]);
4952 =head2 symlink_file(src, dest)
4954 Creates a soft link, unless in read-only mode. Effectively does the same thing
4955 as the Perl symlink function.
4960 if (&is_readonly_mode()) {
4961 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4964 my $src = &translate_filename($_[0]);
4965 my $dst = &translate_filename($_[1]);
4966 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
4967 if ($gconfig{'debug_what_ops'});
4968 return symlink($src, $dst);
4971 =head2 link_file(src, dest)
4973 Creates a hard link, unless in read-only mode. The existing new link file
4974 will be deleted if necessary. Effectively the same as Perl's link function.
4979 if (&is_readonly_mode()) {
4980 print STDERR "Vetoing link from $_[0] to $_[1]\n";
4983 my $src = &translate_filename($_[0]);
4984 my $dst = &translate_filename($_[1]);
4985 &webmin_debug_log('LINK', "src=$src dst=$dst")
4986 if ($gconfig{'debug_what_ops'});
4987 unlink($dst); # make sure link works
4988 return link($src, $dst);
4991 =head2 make_dir(dir, perms, recursive)
4993 Creates a directory and sets permissions on it, unless in read-only mode.
4994 The perms parameter sets the octal permissions to apply, which unlike Perl's
4995 mkdir will really get set. The recursive flag can be set to 1 to have the
4996 function create parent directories too.
5001 my ($dir, $perms, $recur) = @_;
5002 if (&is_readonly_mode()) {
5003 print STDERR "Vetoing directory $dir\n";
5006 $dir = &translate_filename($dir);
5007 my $exists = -d $dir ? 1 : 0;
5008 return 1 if ($exists && $recur); # already exists
5009 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5010 my $rv = mkdir($dir, $perms);
5011 if (!$rv && $recur) {
5012 # Failed .. try mkdir -p
5013 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5014 my $ex = &execute_command("mkdir $param "."e_path($dir));
5020 chmod($perms, $dir);
5025 =head2 set_ownership_permissions(user, group, perms, file, ...)
5027 Sets the user, group owner and permissions on some files. The parameters are :
5029 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5031 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5033 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5035 =item file - One or more files or directories to modify.
5038 sub set_ownership_permissions
5040 my ($user, $group, $perms, @files) = @_;
5041 if (&is_readonly_mode()) {
5042 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5045 @files = map { &translate_filename($_) } @files;
5046 if ($gconfig{'debug_what_ops'}) {
5047 foreach my $f (@files) {
5048 &webmin_debug_log('PERMS',
5049 "file=$f user=$user group=$group perms=$perms");
5053 if (defined($user)) {
5054 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5056 if (defined($group)) {
5057 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5060 my @uinfo = getpwuid($uid);
5063 $rv = chown($uid, $gid, @files);
5065 if ($rv && defined($perms)) {
5066 $rv = chmod($perms, @files);
5071 =head2 unlink_logged(file, ...)
5073 Like Perl's unlink function, but locks the files beforehand and un-locks them
5074 after so that the deletion is logged by Webmin.
5080 foreach my $f (@_) {
5081 if (!&test_lock($f)) {
5086 my @rv = &unlink_file(@_);
5087 foreach my $f (@_) {
5092 return wantarray ? @rv : $rv[0];
5095 =head2 unlink_file(file, ...)
5097 Deletes some files or directories. Like Perl's unlink function, but also
5098 recursively deletes directories with the rm command if needed.
5103 return 1 if (&is_readonly_mode());
5106 foreach my $f (@_) {
5107 my $realf = &translate_filename($f);
5108 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5110 if (!rmdir($realf)) {
5112 if ($gconfig{'os_type'} eq 'windows') {
5113 # Call del and rmdir commands
5116 my $out = `del /q "$qm" 2>&1`;
5118 $out = `rmdir "$qm" 2>&1`;
5123 my $qm = quotemeta($realf);
5124 $out = `rm -rf $qm 2>&1`;
5133 if (!unlink($realf)) {
5139 return wantarray ? ($rv, $err) : $rv;
5142 =head2 copy_source_dest(source, dest)
5144 Copy some file or directory to a new location. Returns 1 on success, or 0
5145 on failure - also sets $! on failure. If the source is a directory, uses
5146 piped tar commands to copy a whole directory structure including permissions
5150 sub copy_source_dest
5152 return (1, undef) if (&is_readonly_mode());
5153 my ($src, $dst) = @_;
5156 &webmin_debug_log('COPY', "src=$src dst=$dst")
5157 if ($gconfig{'debug_what_ops'});
5158 if ($gconfig{'os_type'} eq 'windows') {
5159 # No tar or cp on windows, so need to use copy command
5163 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5166 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5174 # A directory .. need to copy with tar command
5175 my @st = stat($src);
5178 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5179 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5186 # Can just copy with cp
5187 my $out = &backquote_logged("cp -p ".quotemeta($src).
5188 " ".quotemeta($dst)." 2>&1");
5194 return wantarray ? ($ok, $err) : $ok;
5197 =head2 remote_session_name(host|&server)
5199 Generates a session ID for some server. For this server, this will always
5200 be an empty string. For a server object it will include the hostname and
5201 port and PID. For a server name, it will include the hostname and PID. For
5205 sub remote_session_name
5207 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5208 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5209 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5210 ref($_[0]) ? "" : "$_[0].$$";
5213 =head2 remote_foreign_require(server, module, file)
5215 Connects to rpc.cgi on a remote webmin server and have it open a session
5216 to a process that will actually do the require and run functions. This is the
5217 equivalent for foreign_require, but for a remote Webmin system. The server
5218 parameter can either be a hostname of a system registered in the Webmin
5219 Servers Index module, or a hash reference for a system from that module.
5222 sub remote_foreign_require
5224 my $call = { 'action' => 'require',
5227 my $sn = &remote_session_name($_[0]);
5228 if ($remote_session{$sn}) {
5229 $call->{'session'} = $remote_session{$sn};
5232 $call->{'newsession'} = 1;
5234 my $rv = &remote_rpc_call($_[0], $call);
5235 if ($rv->{'session'}) {
5236 $remote_session{$sn} = $rv->{'session'};
5237 $remote_session_server{$sn} = $_[0];
5241 =head2 remote_foreign_call(server, module, function, [arg]*)
5243 Call a function on a remote server. Must have been setup first with
5244 remote_foreign_require for the same server and module. Equivalent to
5245 foreign_call, but with the extra server parameter to specify the remote
5249 sub remote_foreign_call
5251 return undef if (&is_readonly_mode());
5252 my $sn = &remote_session_name($_[0]);
5253 return &remote_rpc_call($_[0], { 'action' => 'call',
5256 'session' => $remote_session{$sn},
5257 'args' => [ @_[3 .. $#_] ] } );
5260 =head2 remote_foreign_check(server, module, [api-only])
5262 Checks if some module is installed and supported on a remote server. Equivilant
5263 to foreign_check, but for the remote Webmin system specified by the server
5267 sub remote_foreign_check
5269 return &remote_rpc_call($_[0], { 'action' => 'check',
5274 =head2 remote_foreign_config(server, module)
5276 Gets the configuration for some module from a remote server, as a hash.
5277 Equivalent to foreign_config, but for a remote system.
5280 sub remote_foreign_config
5282 return &remote_rpc_call($_[0], { 'action' => 'config',
5283 'module' => $_[1] });
5286 =head2 remote_eval(server, module, code)
5288 Evaluates some perl code in the context of a module on a remote webmin server.
5289 The server parameter must be the hostname of a remote system, module must
5290 be a module directory name, and code a string of Perl code to run. This can
5291 only be called after remote_foreign_require for the same server and module.
5296 return undef if (&is_readonly_mode());
5297 my $sn = &remote_session_name($_[0]);
5298 return &remote_rpc_call($_[0], { 'action' => 'eval',
5301 'session' => $remote_session{$sn} });
5304 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5306 Transfers some local file to another server via Webmin's RPC protocol, and
5307 returns the resulting remote filename. If the remotefile parameter is given,
5308 that is the destination filename which will be used. Otherwise a randomly
5309 selected temporary filename will be used, and returned by the function.
5314 return undef if (&is_readonly_mode());
5316 my $sn = &remote_session_name($_[0]);
5317 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5318 # Copy data over TCP connection
5319 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5321 'name' => $_[3] } );
5323 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5324 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5325 return &$main::remote_error_handler("Failed to transfer file : $error")
5328 while(read(FILE, $got, 1024) > 0) {
5332 shutdown(TWRITE, 1);
5334 if ($error && $error !~ /^OK/) {
5335 # Got back an error!
5336 return &$main::remote_error_handler("Failed to transfer file : $error");
5342 # Just pass file contents as parameters
5344 while(read(FILE, $got, 1024) > 0) {
5348 return &remote_rpc_call($_[0], { 'action' => 'write',
5351 'session' => $remote_session{$sn} });
5355 =head2 remote_read(server, localfile, remotefile)
5357 Transfers a file from a remote server to this system, using Webmin's RPC
5358 protocol. The server parameter must be the hostname of a system registered
5359 in the Webmin Servers Index module, localfile is the destination path on this
5360 system, and remotefile is the file to fetch from the remote server.
5365 my $sn = &remote_session_name($_[0]);
5366 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5367 # Copy data over TCP connection
5368 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5369 'file' => $_[2] } );
5371 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5374 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5375 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5376 return &$main::remote_error_handler("Failed to transfer file : $error")
5379 open(FILE, ">$_[1]");
5380 while(read(TREAD, $got, 1024) > 0) {
5387 # Just get data as return value
5388 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5390 'session' => $remote_session{$sn} });
5391 open(FILE, ">$_[1]");
5397 =head2 remote_finished
5399 Close all remote sessions. This happens automatically after a while
5400 anyway, but this function should be called to clean things up faster.
5405 foreach my $sn (keys %remote_session) {
5406 my $server = $remote_session_server{$sn};
5407 &remote_rpc_call($server, { 'action' => 'quit',
5408 'session' => $remote_session{$sn} } );
5409 delete($remote_session{$sn});
5410 delete($remote_session_server{$sn});
5412 foreach $fh (keys %fast_fh_cache) {
5414 delete($fast_fh_cache{$fh});
5418 =head2 remote_error_setup(&function)
5420 Sets a function to be called instead of &error when a remote RPC operation
5421 fails. Useful if you want to have more control over your remote operations.
5424 sub remote_error_setup
5426 $main::remote_error_handler = $_[0] || \&error;
5429 =head2 remote_rpc_call(server, structure)
5431 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5432 and then reads back a reply structure. This is mainly for internal use only,
5433 and is called by the other remote_* functions.
5439 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5441 # Server structure was given
5443 $serv->{'user'} || $serv->{'id'} == 0 ||
5444 return &$main::remote_error_handler(
5445 "No Webmin login set for server");
5448 # lookup the server in the webmin servers module if needed
5449 if (!defined(%main::remote_servers_cache)) {
5450 &foreign_require("servers", "servers-lib.pl");
5451 foreach $s (&foreign_call("servers", "list_servers")) {
5452 $main::remote_servers_cache{$s->{'host'}} = $s;
5453 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5456 $serv = $main::remote_servers_cache{$_[0]};
5457 $serv || return &$main::remote_error_handler(
5458 "No Webmin Servers entry for $_[0]");
5459 $serv->{'user'} || return &$main::remote_error_handler(
5460 "No login set for server $_[0]");
5462 my $ip = $serv->{'ip'} || $serv->{'host'};
5464 # Work out the username and password
5466 if ($serv->{'sameuser'}) {
5467 $user = $remote_user;
5468 defined($main::remote_pass) || return &$main::remote_error_handler(
5469 "Password for this server is not available");
5470 $pass = $main::remote_pass;
5473 $user = $serv->{'user'};
5474 $pass = $serv->{'pass'};
5477 if ($serv->{'fast'} || !$sn) {
5478 # Make TCP connection call to fastrpc.cgi
5479 if (!$fast_fh_cache{$sn} && $sn) {
5480 # Need to open the connection
5481 my $con = &make_http_connection(
5482 $ip, $serv->{'port'}, $serv->{'ssl'},
5483 "POST", "/fastrpc.cgi");
5484 return &$main::remote_error_handler(
5485 "Failed to connect to $serv->{'host'} : $con")
5487 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5488 &write_http_connection($con, "User-agent: Webmin\r\n");
5489 my $auth = &encode_base64("$user:$pass");
5491 &write_http_connection($con, "Authorization: basic $auth\r\n");
5492 &write_http_connection($con, "Content-length: ",
5493 length($tostr),"\r\n");
5494 &write_http_connection($con, "\r\n");
5495 &write_http_connection($con, $tostr);
5497 # read back the response
5498 my $line = &read_http_connection($con);
5499 $line =~ tr/\r\n//d;
5500 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5501 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5503 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5504 return &$main::remote_error_handler("HTTP error : $line");
5506 $line = &read_http_connection($con);
5507 $line =~ tr/\r\n//d;
5509 $line = &read_http_connection($con);
5510 if ($line =~ /^0\s+(.*)/) {
5511 return &$main::remote_error_handler("RPC error : $1");
5513 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5514 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5515 # Started ok .. connect and save SID
5516 &close_http_connection($con);
5517 my ($port, $sid, $version, $error) = ($1, $2, $3);
5518 &open_socket($ip, $port, $sid, \$error);
5519 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5521 $fast_fh_cache{$sn} = $sid;
5522 $remote_server_version{$sn} = $version;
5525 while($stuff = &read_http_connection($con)) {
5528 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5531 elsif (!$fast_fh_cache{$sn}) {
5532 # Open the connection by running fastrpc.cgi locally
5533 pipe(RPCOUTr, RPCOUTw);
5537 open(STDOUT, ">&RPCOUTw");
5541 $ENV{'REQUEST_METHOD'} = 'GET';
5542 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5543 $ENV{'SERVER_ROOT'} ||= $root_directory;
5545 if ($base_remote_user ne 'root' &&
5546 $base_remote_user ne 'admin') {
5547 # Need to fake up a login for the CGI!
5548 &read_acl(undef, \%acl);
5549 $ENV{'BASE_REMOTE_USER'} =
5550 $ENV{'REMOTE_USER'} =
5551 $acl{'root'} ? 'root' : 'admin';
5553 delete($ENV{'FOREIGN_MODULE_NAME'});
5554 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5555 chdir($root_directory);
5556 if (!exec("$root_directory/fastrpc.cgi")) {
5557 print "exec failed : $!\n";
5564 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5568 if ($line =~ /^0\s+(.*)/) {
5569 return &$main::remote_error_handler("RPC error : $2");
5571 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5572 # Started ok .. connect and save SID
5574 my ($port, $sid, $error) = ($1, $2, undef);
5575 &open_socket("localhost", $port, $sid, \$error);
5576 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5577 $fast_fh_cache{$sn} = $sid;
5584 &error("Bad response from fastrpc.cgi : $line");
5587 # Got a connection .. send off the request
5588 my $fh = $fast_fh_cache{$sn};
5589 my $tostr = &serialise_variable($_[1]);
5590 print $fh length($tostr)," $fh\n";
5592 my $rlen = int(<$fh>);
5593 my ($fromstr, $got);
5594 while(length($fromstr) < $rlen) {
5595 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5596 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5599 my $from = &unserialise_variable($fromstr);
5601 return &$main::remote_error_handler("Remote Webmin error");
5603 if (defined($from->{'arv'})) {
5604 return @{$from->{'arv'}};
5607 return $from->{'rv'};
5611 # Call rpc.cgi on remote server
5612 my $tostr = &serialise_variable($_[1]);
5614 my $con = &make_http_connection($ip, $serv->{'port'},
5615 $serv->{'ssl'}, "POST", "/rpc.cgi");
5616 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5618 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5619 &write_http_connection($con, "User-agent: Webmin\r\n");
5620 my $auth = &encode_base64("$user:$pass");
5622 &write_http_connection($con, "Authorization: basic $auth\r\n");
5623 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5624 &write_http_connection($con, "\r\n");
5625 &write_http_connection($con, $tostr);
5627 # read back the response
5628 my $line = &read_http_connection($con);
5629 $line =~ tr/\r\n//d;
5630 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5631 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5633 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5635 $line = &read_http_connection($con);
5636 $line =~ tr/\r\n//d;
5639 while($line = &read_http_connection($con)) {
5643 my $from = &unserialise_variable($fromstr);
5644 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5645 if (defined($from->{'arv'})) {
5646 return @{$from->{'arv'}};
5649 return $from->{'rv'};
5654 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5656 Executes some function in parallel on multiple servers at once. Fills in
5657 the returns and errors arrays respectively. If the module and library
5658 parameters are given, that module is remotely required on the server first,
5659 to check if it is connectable. The parameters are :
5661 =item servers - A list of Webmin system hash references.
5663 =item parallel - Number of parallel operations to perform.
5665 =item function - Reference to function to call for each system.
5667 =item args - Additional parameters to the function.
5669 =item returns - Array ref to place return values into, in same order as servers.
5671 =item errors - Array ref to place error messages into.
5673 =item module - Optional module to require on the remote system first.
5675 =item library - Optional library to require in the module.
5678 sub remote_multi_callback
5680 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5681 &remote_error_setup(\&remote_multi_callback_error);
5683 # Call the functions
5685 foreach my $g (@$servs) {
5691 $remote_multi_callback_err = undef;
5693 # Require the remote lib
5694 &remote_foreign_require($g->{'host'}, $mod, $lib);
5695 if ($remote_multi_callback_err) {
5696 # Failed .. return error
5697 print $wh &serialise_variable(
5698 [ undef, $remote_multi_callback_err ]);
5704 my $a = ref($args) ? $args->[$p] : $args;
5705 my $rv = &$func($g, $a);
5708 print $wh &serialise_variable(
5709 [ $rv, $remote_multi_callback_err ]);
5717 # Read back the results
5719 foreach my $g (@$servs) {
5723 $errs->[$p] = "Failed to read response from $g->{'host'}";
5726 my $rv = &unserialise_variable($line);
5728 $rets->[$p] = $rv->[0];
5729 $errs->[$p] = $rv->[1];
5734 &remote_error_setup(undef);
5737 sub remote_multi_callback_error
5739 $remote_multi_callback_err = $_[0];
5742 =head2 serialise_variable(variable)
5744 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5745 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5746 called on each member to serialize the entire object.
5749 sub serialise_variable
5751 if (!defined($_[0])) {
5757 $rv = &urlize($_[0]);
5759 elsif ($r eq 'SCALAR') {
5760 $rv = &urlize(${$_[0]});
5762 elsif ($r eq 'ARRAY') {
5763 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5765 elsif ($r eq 'HASH') {
5766 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5767 &urlize(&serialise_variable($_[0]->{$_})) }
5770 elsif ($r eq 'REF') {
5771 $rv = &serialise_variable(${$_[0]});
5773 elsif ($r eq 'CODE') {
5778 # An object - treat as a hash
5779 $r = "OBJECT ".&urlize($r);
5780 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5781 &urlize(&serialise_variable($_[0]->{$_})) }
5784 return ($r ? $r : 'VAL').",".$rv;
5787 =head2 unserialise_variable(string)
5789 Converts a string created by serialise_variable() back into the original
5790 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5791 object, the same class is used on this system, if available.
5794 sub unserialise_variable
5796 my @v = split(/,/, $_[0]);
5798 if ($v[0] eq 'VAL') {
5799 @v = split(/,/, $_[0], -1);
5800 $rv = &un_urlize($v[1]);
5802 elsif ($v[0] eq 'SCALAR') {
5803 local $r = &un_urlize($v[1]);
5806 elsif ($v[0] eq 'ARRAY') {
5808 for(my $i=1; $i<@v; $i++) {
5809 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5812 elsif ($v[0] eq 'HASH') {
5814 for(my $i=1; $i<@v; $i+=2) {
5815 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5816 &unserialise_variable(&un_urlize($v[$i+1]));
5819 elsif ($v[0] eq 'REF') {
5820 local $r = &unserialise_variable($v[1]);
5823 elsif ($v[0] eq 'UNDEF') {
5826 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5827 # An object hash that we have to re-bless
5830 for(my $i=1; $i<@v; $i+=2) {
5831 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5832 &unserialise_variable(&un_urlize($v[$i+1]));
5840 =head2 other_groups(user)
5842 Returns a list of secondary groups a user is a member of, as a list of
5851 while(my @g = getgrent()) {
5852 my @m = split(/\s+/, $g[3]);
5853 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5855 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5859 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5861 Returns HTML for a button that pops up a data chooser window. The parameters
5864 =item dayfield - Name of the text field to place the day of the month into.
5866 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5868 =item yearfield - Name of the text field to place the year into.
5871 sub date_chooser_button
5873 return &theme_date_chooser_button(@_)
5874 if (defined(&theme_date_chooser_button));
5875 my ($w, $h) = (250, 225);
5876 if ($gconfig{'db_sizedate'}) {
5877 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5879 return "<input type=button onClick='window.dfield = form.$_[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";
5882 =head2 help_file(module, file)
5884 Returns the path to a module's help file of some name, typically under the
5885 help directory with a .html extension.
5890 my $mdir = &module_root_directory($_[0]);
5891 my $dir = "$mdir/help";
5892 foreach my $o (@lang_order_list) {
5893 my $lang = "$dir/$_[1].$current_lang.html";
5894 return $lang if (-r $lang);
5896 return "$dir/$_[1].html";
5901 Seeds the random number generator, if not already done in this script. On Linux
5902 this makes use of the current time, process ID and a read from /dev/urandom.
5903 On other systems, only the current time and process ID are used.
5908 if (!$main::done_seed_random) {
5909 if (open(RANDOM, "/dev/urandom")) {
5911 read(RANDOM, $buf, 4);
5913 srand(time() ^ $$ ^ $buf);
5918 $main::done_seed_random = 1;
5922 =head2 disk_usage_kb(directory)
5924 Returns the number of kB used by some directory and all subdirs. Implemented
5925 by calling the C<du -k> command.
5930 my $dir = &translate_filename($_[0]);
5932 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5934 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5936 return $out =~ /^([0-9]+)/ ? $1 : "???";
5939 =head2 recursive_disk_usage(directory)
5941 Returns the number of bytes taken up by all files in some directory and all
5942 sub-directories, by summing up their lengths. The disk_usage_kb is more
5943 reflective of reality, as the filesystem typically pads file sizes to 1k or
5947 sub recursive_disk_usage
5949 my $dir = &translate_filename($_[0]);
5954 my @st = stat($dir);
5960 my @files = readdir(DIR);
5962 foreach my $f (@files) {
5963 next if ($f eq "." || $f eq "..");
5964 $rv += &recursive_disk_usage("$dir/$f");
5970 =head2 help_search_link(term, [ section, ... ] )
5972 Returns HTML for a link to the man module for searching local and online
5973 docs for various search terms. The term parameter can either be a single
5974 word like 'bind', or a space-separated list of words. This function is typically
5975 used by modules that want to refer users to additional documentation in man
5976 pages or local system doc files.
5979 sub help_search_link
5981 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
5982 my $for = &urlize(shift(@_));
5983 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
5984 join("&", map { "section=$_" } @_)."&".
5985 "for=$for&exact=1&check=".&get_module_name()."'>".
5986 $text{'helpsearch'}."</a>\n";
5993 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
5995 Opens a connection to some HTTP server, maybe through a proxy, and returns
5996 a handle object. The handle can then be used to send additional headers
5997 and read back a response. If anything goes wrong, returns an error string.
5998 The parameters are :
6000 =item host - Hostname or IP address of the webserver to connect to.
6002 =item port - HTTP port number to connect to.
6004 =item ssl - Set to 1 to connect in SSL mode.
6006 =item method - HTTP method, like GET or POST.
6008 =item page - Page to request on the webserver, like /foo/index.html
6010 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6013 sub make_http_connection
6015 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6018 foreach my $h (@$headers) {
6019 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6023 if (&is_readonly_mode()) {
6024 return "HTTP connections not allowed in readonly mode";
6026 my $rv = { 'fh' => time().$$ };
6029 eval "use Net::SSLeay";
6030 $@ && return $text{'link_essl'};
6031 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6032 eval "Net::SSLeay::load_error_strings()";
6033 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6034 return "Failed to create SSL context";
6035 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6036 return "Failed to create SSL connection";
6038 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6039 !&no_proxy($host)) {
6042 &open_socket($1, $2, $rv->{'fh'}, \$error);
6045 my $fh = $rv->{'fh'};
6046 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6047 if ($gconfig{'proxy_user'}) {
6048 my $auth = &encode_base64(
6049 "$gconfig{'proxy_user'}:".
6050 "$gconfig{'proxy_pass'}");
6051 $auth =~ tr/\r\n//d;
6052 print $fh "Proxy-Authorization: Basic $auth\r\n";
6056 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6057 return "Proxy error : $3" if ($2 != 200);
6060 return "Proxy error : $line";
6065 elsif (!$gconfig{'proxy_fallback'}) {
6066 # Connection to proxy failed - give up
6073 &open_socket($host, $port, $rv->{'fh'}, \$error);
6074 return $error if ($error);
6076 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6077 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6078 return "SSL connect() failed";
6079 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6080 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6083 # Plain HTTP request
6085 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6086 !&no_proxy($host)) {
6089 &open_socket($1, $2, $rv->{'fh'}, \$error);
6093 my $fh = $rv->{'fh'};
6094 my $rtxt = $method." ".
6095 "http://$host:$port$page HTTP/1.0\r\n";
6096 if ($gconfig{'proxy_user'}) {
6097 my $auth = &encode_base64(
6098 "$gconfig{'proxy_user'}:".
6099 "$gconfig{'proxy_pass'}");
6100 $auth =~ tr/\r\n//d;
6101 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6106 elsif (!$gconfig{'proxy_fallback'}) {
6111 # Connecting directly
6113 &open_socket($host, $port, $rv->{'fh'}, \$error);
6114 return $error if ($error);
6115 my $fh = $rv->{'fh'};
6116 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6123 =head2 read_http_connection(&handle, [bytes])
6125 Reads either one line or up to the specified number of bytes from the handle,
6126 originally supplied by make_http_connection.
6129 sub read_http_connection
6133 if ($h->{'ssl_con'}) {
6136 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6137 # need to read more..
6138 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6140 $rv = $h->{'buffer'};
6141 delete($h->{'buffer'});
6144 $h->{'buffer'} .= $more;
6146 $rv = substr($h->{'buffer'}, 0, $idx+1);
6147 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6150 if (length($h->{'buffer'})) {
6151 $rv = $h->{'buffer'};
6152 delete($h->{'buffer'});
6155 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6161 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6164 my $fh = $h->{'fh'};
6168 $rv = undef if ($rv eq "");
6172 =head2 write_http_connection(&handle, [data+])
6174 Writes the given data to the given HTTP connection handle.
6177 sub write_http_connection
6180 my $fh = $h->{'fh'};
6182 if ($h->{'ssl_ctx'}) {
6183 foreach my $s (@_) {
6184 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6185 $allok = 0 if (!$ok);
6189 my $ok = (print $fh @_);
6190 $allok = 0 if (!$ok);
6195 =head2 close_http_connection(&handle)
6197 Closes a connection to an HTTP server, identified by the given handle.
6200 sub close_http_connection
6206 =head2 clean_environment
6208 Deletes any environment variables inherited from miniserv so that they
6209 won't be passed to programs started by webmin. This is useful when calling
6210 programs that check for CGI-related environment variables and modify their
6211 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6214 sub clean_environment
6216 %UNCLEAN_ENV = %ENV;
6217 foreach my $k (keys %ENV) {
6218 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6222 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6223 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6224 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6225 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6226 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6227 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6228 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6229 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD') {
6234 =head2 reset_environment
6236 Puts the environment back how it was before clean_environment was callled.
6239 sub reset_environment
6241 if (defined(%UNCLEAN_ENV)) {
6242 foreach my $k (keys %UNCLEAN_ENV) {
6243 $ENV{$k} = $UNCLEAN_ENV{$k};
6245 undef(%UNCLEAN_ENV);
6249 =head2 progress_callback
6251 Never called directly, but useful for passing to &http_download to print
6252 out progress of an HTTP request.
6255 sub progress_callback
6257 if (defined(&theme_progress_callback)) {
6258 # Call the theme override
6259 return &theme_progress_callback(@_);
6263 print $progress_callback_prefix;
6265 $progress_size = $_[1];
6266 $progress_step = int($_[1] / 10);
6267 print &text('progress_size', $progress_callback_url,
6268 $progress_size),"<br>\n";
6271 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6273 $last_progress_time = $last_progress_size = undef;
6275 elsif ($_[0] == 3) {
6277 my $sp = $progress_callback_prefix.(" " x 5);
6278 if ($progress_size) {
6279 # And we have a size to compare against
6280 my $st = int(($_[1] * 10) / $progress_size);
6281 my $time_now = time();
6282 if ($st != $progress_step ||
6283 $time_now - $last_progress_time > 60) {
6284 # Show progress every 10% or 60 seconds
6285 print $sp,&text('progress_data', $_[1], int($_[1]*100/$progress_size)),"<br>\n";
6286 $last_progress_time = $time_now;
6288 $progress_step = $st;
6291 # No total size .. so only show in 100k jumps
6292 if ($_[1] > $last_progress_size+100*1024) {
6293 print $sp,&text('progress_data2', $_[1]),"<br>\n";
6294 $last_progress_size = $_[1];
6298 elsif ($_[0] == 4) {
6299 # All done downloading
6300 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6302 elsif ($_[0] == 5) {
6303 # Got new location after redirect
6304 $progress_callback_url = $_[1];
6306 elsif ($_[0] == 6) {
6308 $progress_callback_url = $_[1];
6309 print &text('progress_incache', $progress_callback_url),"<br>\n";
6313 =head2 switch_to_remote_user
6315 Changes the user and group of the current process to that of the unix user
6316 with the same name as the current webmin login, or fails if there is none.
6317 This should be called by Usermin module scripts that only need to run with
6318 limited permissions.
6321 sub switch_to_remote_user
6323 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6325 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6326 &create_missing_homedir(\@remote_user_info);
6328 &switch_to_unix_user(\@remote_user_info);
6329 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6330 $ENV{'HOME'} = $remote_user_info[7];
6332 # Export global variables to caller
6333 if ($main::export_to_caller) {
6334 my ($callpkg) = caller();
6335 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6339 =head2 switch_to_unix_user(&user-details)
6341 Switches the current process to the UID and group ID from the given list
6342 of user details, which must be in the format returned by getpwnam.
6345 sub switch_to_unix_user
6348 if (!defined($uinfo->[0])) {
6349 # No username given, so just use given GID
6350 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6353 # Use all groups from user
6354 ($(, $)) = ( $uinfo->[3],
6355 "$uinfo->[3] ".join(" ", $uinfo->[3],
6356 &other_groups($uinfo->[0])) );
6359 POSIX::setuid($uinfo->[2]);
6361 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6362 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6366 =head2 eval_as_unix_user(username, &code)
6368 Runs some code fragment with the effective UID and GID switch to that
6369 of the given Unix user, so that file IO takes place with his permissions.
6373 sub eval_as_unix_user
6375 my ($user, $code) = @_;
6376 my @uinfo = getpwnam($user);
6377 if (!scalar(@uinfo)) {
6378 &error("eval_as_unix_user called with invalid user $user");
6380 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6384 local $main::error_must_die = 1;
6391 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6394 return wantarray ? @rv : $rv[0];
6397 =head2 create_user_config_dirs
6399 Creates per-user config directories and sets $user_config_directory and
6400 $user_module_config_directory to them. Also reads per-user module configs
6401 into %userconfig. This should be called by Usermin module scripts that need
6402 to store per-user preferences or other settings.
6405 sub create_user_config_dirs
6407 return if (!$gconfig{'userconfig'});
6408 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6409 return if (!@uinfo || !$uinfo[7]);
6410 &create_missing_homedir(\@uinfo);
6411 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6412 if (!-d $user_config_directory) {
6413 mkdir($user_config_directory, 0700) ||
6414 &error("Failed to create $user_config_directory : $!");
6415 if ($< == 0 && $uinfo[2]) {
6416 chown($uinfo[2], $uinfo[3], $user_config_directory);
6419 if (&get_module_name()) {
6420 $user_module_config_directory = $user_config_directory."/".
6422 if (!-d $user_module_config_directory) {
6423 mkdir($user_module_config_directory, 0700) ||
6424 &error("Failed to create $user_module_config_directory : $!");
6425 if ($< == 0 && $uinfo[2]) {
6426 chown($uinfo[2], $uinfo[3], $user_config_directory);
6430 &read_file_cached("$module_root_directory/defaultuconfig",
6432 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6433 &read_file_cached("$user_module_config_directory/config",
6437 # Export global variables to caller
6438 if ($main::export_to_caller) {
6439 my ($callpkg) = caller();
6440 foreach my $v ('$user_config_directory',
6441 '$user_module_config_directory', '%userconfig') {
6442 my ($vt, $vn) = split('', $v, 2);
6443 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6448 =head2 create_missing_homedir(&uinfo)
6450 If auto homedir creation is enabled, create one for this user if needed.
6451 For internal use only.
6454 sub create_missing_homedir
6457 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6458 # Use has no home dir .. make one
6459 system("mkdir -p ".quotemeta($uinfo->[7]));
6460 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6461 if ($gconfig{'create_homedir_perms'} ne '') {
6462 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6467 =head2 filter_javascript(text)
6469 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6470 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6473 sub filter_javascript
6476 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6477 $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;
6478 $rv =~ s/(javascript:)/x$1/gi;
6479 $rv =~ s/(vbscript:)/x$1/gi;
6483 =head2 resolve_links(path)
6485 Given a path that may contain symbolic links, returns the real path.
6491 $path =~ s/\/+/\//g;
6492 $path =~ s/\/$// if ($path ne "/");
6493 my @p = split(/\/+/, $path);
6495 for(my $i=0; $i<@p; $i++) {
6496 my $sofar = "/".join("/", @p[0..$i]);
6497 my $lnk = readlink($sofar);
6498 if ($lnk eq $sofar) {
6499 # Link to itself! Cannot do anything more really ..
6502 elsif ($lnk =~ /^\//) {
6503 # Link is absolute..
6504 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6508 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6514 =head2 simplify_path(path, bogus)
6516 Given a path, maybe containing elements ".." and "." , convert it to a
6517 clean, absolute form. Returns undef if this is not possible.
6525 my @bits = split(/\/+/, $dir);
6528 foreach my $b (@bits) {
6532 elsif ($b eq "..") {
6534 if (scalar(@fixedbits) == 0) {
6535 # Cannot! Already at root!
6542 push(@fixedbits, $b);
6545 return "/".join('/', @fixedbits);
6548 =head2 same_file(file1, file2)
6550 Returns 1 if two files are actually the same
6555 return 1 if ($_[0] eq $_[1]);
6556 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6557 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6558 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6559 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6560 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6561 return 0 if (!@stat1 || !@stat2);
6562 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6565 =head2 flush_webmin_caches
6567 Clears all in-memory and on-disk caches used by Webmin.
6570 sub flush_webmin_caches
6572 undef(%main::read_file_cache);
6573 undef(%main::acl_hash_cache);
6574 undef(%main::acl_array_cache);
6575 undef(%main::has_command_cache);
6576 undef(@main::list_languages_cache);
6577 undef($main::got_list_usermods_cache);
6578 undef(@main::list_usermods_cache);
6579 undef(%main::foreign_installed_cache);
6580 unlink("$config_directory/module.infos.cache");
6581 &get_all_module_infos();
6584 =head2 list_usermods
6586 Returns a list of additional module restrictions. For internal use in
6592 if (!$main::got_list_usermods_cache) {
6593 @main::list_usermods_cache = ( );
6595 open(USERMODS, "$config_directory/usermin.mods");
6597 if (/^([^:]+):(\+|-|):(.*)/) {
6598 push(@main::list_usermods_cache,
6599 [ $1, $2, [ split(/\s+/, $3) ] ]);
6603 $main::got_list_usermods_cache = 1;
6605 return @main::list_usermods_cache;
6608 =head2 available_usermods(&allmods, &usermods)
6610 Returns a list of modules that are available to the given user, based
6611 on usermod additional/subtractions. For internal use by Usermin only.
6614 sub available_usermods
6616 return @{$_[0]} if (!@{$_[1]});
6618 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6619 my @uinfo = @remote_user_info;
6620 @uinfo = getpwnam($remote_user) if (!@uinfo);
6621 foreach my $u (@{$_[1]}) {
6623 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6626 elsif ($u->[0] =~ /^\@(.*)$/) {
6627 # Check for group membership
6628 my @ginfo = getgrnam($1);
6629 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6630 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6632 elsif ($u->[0] =~ /^\//) {
6633 # Check users and groups in file
6635 open(USERFILE, $u->[0]);
6638 if ($_ eq $remote_user) {
6641 elsif (/^\@(.*)$/) {
6642 my @ginfo = getgrnam($1);
6644 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6645 &indexof($remote_user,
6646 split(/\s+/, $ginfo[3])) >= 0));
6653 if ($u->[1] eq "+") {
6654 map { $mods{$_}++ } @{$u->[2]};
6656 elsif ($u->[1] eq "-") {
6657 map { delete($mods{$_}) } @{$u->[2]};
6661 map { $mods{$_}++ } @{$u->[2]};
6665 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6668 =head2 get_available_module_infos(nocache)
6670 Returns a list of modules available to the current user, based on
6671 operating system support, access control and usermod restrictions. Useful
6672 in themes that need to display a list of modules the user can use.
6673 Each element of the returned array is a hash reference in the same format as
6674 returned by get_module_info.
6677 sub get_available_module_infos
6680 &read_acl(\%acl, \%uacl);
6681 my $risk = $gconfig{'risk_'.$base_remote_user};
6683 foreach my $minfo (&get_all_module_infos($_[0])) {
6684 next if (!&check_os_support($minfo));
6686 # Check module risk level
6687 next if ($risk ne 'high' && $minfo->{'risk'} &&
6688 $minfo->{'risk'} !~ /$risk/);
6692 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6693 !$acl{$base_remote_user,"*"});
6695 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6699 # Check usermod restrictions
6700 my @usermods = &list_usermods();
6701 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6702 &available_usermods(\@rv, \@usermods);
6704 # Check RBAC restrictions
6706 foreach my $m (@rv) {
6707 if (&supports_rbac($m->{'dir'}) &&
6708 &use_rbac_module_acl(undef, $m->{'dir'})) {
6709 local $rbacs = &get_rbac_module_acl($remote_user,
6717 # Module or system doesn't support RBAC
6718 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6724 if (defined(&theme_foreign_available)) {
6725 foreach my $m (@rbacrv) {
6726 if (&theme_foreign_available($m->{'dir'})) {
6735 # Check licence module vetos
6737 if ($main::licence_module) {
6738 foreach my $m (@themerv) {
6739 if (&foreign_call($main::licence_module,
6740 "check_module_licence", $m->{'dir'})) {
6752 =head2 get_visible_module_infos(nocache)
6754 Like get_available_module_infos, but excludes hidden modules from the list.
6755 Each element of the returned array is a hash reference in the same format as
6756 returned by get_module_info.
6759 sub get_visible_module_infos
6762 my $pn = &get_product_name();
6763 return grep { !$_->{'hidden'} &&
6764 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6767 =head2 get_visible_modules_categories(nocache)
6769 Returns a list of Webmin module categories, each of which is a hash ref
6770 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6771 of modules in the category, in the format returned by get_module_info.
6772 Un-used modules are automatically assigned to the 'unused' category, and
6773 those with no category are put into 'others'.
6776 sub get_visible_modules_categories
6779 my @mods = &get_visible_module_infos($nocache);
6781 if (&get_product_name() eq 'webmin') {
6782 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6783 @mods = grep { $_->{'installed'} ne '0' } @mods;
6785 my %cats = &list_categories(\@mods);
6787 foreach my $c (keys %cats) {
6788 my $cat = { 'code' => $c || 'other',
6789 'desc' => $cats{$c} };
6790 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6793 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6794 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6796 # Add un-installed modules in magic category
6797 my $cat = { 'code' => 'unused',
6798 'desc' => $text{'main_unused'},
6800 'modules' => \@unmods };
6806 =head2 is_under_directory(directory, file)
6808 Returns 1 if the given file is under the specified directory, 0 if not.
6809 Symlinks are taken into account in the file to find it's 'real' location.
6812 sub is_under_directory
6814 my ($dir, $file) = @_;
6815 return 1 if ($dir eq "/");
6816 return 0 if ($file =~ /\.\./);
6817 my $ld = &resolve_links($dir);
6819 return &is_under_directory($ld, $file);
6821 my $lp = &resolve_links($file);
6823 return &is_under_directory($dir, $lp);
6825 return 0 if (length($file) < length($dir));
6826 return 1 if ($dir eq $file);
6828 return substr($file, 0, length($dir)) eq $dir;
6831 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6833 Given an absolute URL, returns the host, port, page and ssl flag components.
6834 Relative URLs can also be parsed, if the base information is provided.
6839 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6841 my $ssl = $1 eq 'https';
6842 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6848 elsif ($_[0] =~ /^\/\S*$/) {
6849 # A relative to the server URL
6850 return ($_[1], $_[2], $_[0], $_[4]);
6853 # A relative to the directory URL
6855 $page =~ s/[^\/]+$//;
6856 return ($_[1], $_[2], $page.$_[0], $_[4]);
6860 =head2 check_clicks_function
6862 Returns HTML for a JavaScript function called check_clicks that returns
6863 true when first called, but false subsequently. Useful on onClick for
6864 critical buttons. Deprecated, as this method of preventing duplicate actions
6868 sub check_clicks_function
6873 function check_clicks(form)
6880 for(i=0; i<form.length; i++)
6881 form.elements[i].disabled = true;
6890 =head2 load_entities_map
6892 Returns a hash ref containing mappings between HTML entities (like ouml) and
6893 ascii values (like 246). Mainly for internal use.
6896 sub load_entities_map
6898 if (!defined(%entities_map_cache)) {
6900 open(EMAP, "$root_directory/entities_map.txt");
6902 if (/^(\d+)\s+(\S+)/) {
6903 $entities_map_cache{$2} = $1;
6908 return \%entities_map_cache;
6911 =head2 entities_to_ascii(string)
6913 Given a string containing HTML entities like ö and 7, replace them
6914 with their ASCII equivalents.
6917 sub entities_to_ascii
6920 my $emap = &load_entities_map();
6921 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6922 $str =~ s/&#(\d+);/chr($1)/ge;
6926 =head2 get_product_name
6928 Returns either 'webmin' or 'usermin', depending on which program the current
6929 module is in. Useful for modules that can be installed into either.
6932 sub get_product_name
6934 return $gconfig{'product'} if (defined($gconfig{'product'}));
6935 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6940 Returns the character set for the current language, such as iso-8859-1.
6945 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6946 $current_lang_info->{'charset'} ?
6947 $current_lang_info->{'charset'} : $default_charset;
6951 =head2 get_display_hostname
6953 Returns the system's hostname for UI display purposes. This may be different
6954 from the actual hostname if you administrator has configured it so in the
6955 Webmin Configuration module.
6958 sub get_display_hostname
6960 if ($gconfig{'hostnamemode'} == 0) {
6961 return &get_system_hostname();
6963 elsif ($gconfig{'hostnamemode'} == 3) {
6964 return $gconfig{'hostnamedisplay'};
6967 my $h = $ENV{'HTTP_HOST'};
6969 if ($gconfig{'hostnamemode'} == 2) {
6970 $h =~ s/^(www|ftp|mail)\.//i;
6976 =head2 save_module_config([&config], [modulename])
6978 Saves the configuration for some module. The config parameter is an optional
6979 hash reference of names and values to save, which defaults to the global
6980 %config hash. The modulename parameter is the module to update the config
6981 file, which defaults to the current module.
6984 sub save_module_config
6986 my $c = $_[0] || { &get_module_variable('%config') };
6987 my $m = defined($_[1]) ? $_[1] : &get_module_name();
6988 &write_file("$config_directory/$m/config", $c);
6991 =head2 save_user_module_config([&config], [modulename])
6993 Saves the user's Usermin preferences for some module. The config parameter is
6994 an optional hash reference of names and values to save, which defaults to the
6995 global %userconfig hash. The modulename parameter is the module to update the
6996 config file, which defaults to the current module.
6999 sub save_user_module_config
7001 my $c = $_[0] || { &get_module_variable('%userconfig') };
7002 my $m = $_[1] || &get_module_name();
7003 my $ucd = $user_config_directory;
7005 my @uinfo = @remote_user_info ? @remote_user_info
7006 : getpwnam($remote_user);
7007 return if (!@uinfo || !$uinfo[7]);
7008 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7010 &write_file("$ucd/$m/config", $c);
7013 =head2 nice_size(bytes, [min])
7015 Converts a number of bytes into a number followed by a suffix like GB, MB
7016 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7017 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7022 my ($units, $uname);
7023 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7024 $units = 1024*1024*1024*1024;
7027 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7028 $units = 1024*1024*1024;
7031 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7035 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7043 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7045 return $sz." ".$uname;
7048 =head2 get_perl_path
7050 Returns the path to Perl currently in use, such as /usr/bin/perl.
7055 if (open(PERL, "$config_directory/perl-path")) {
7061 return $^X if (-x $^X);
7062 return &has_command("perl");
7065 =head2 get_goto_module([&mods])
7067 Returns the details of a module that the current user should be re-directed
7068 to after logging in, or undef if none. Useful for themes.
7073 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7074 if ($gconfig{'gotomodule'}) {
7075 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7076 return $goto if ($goto);
7078 if (@mods == 1 && $gconfig{'gotoone'}) {
7084 =head2 select_all_link(field, form, [text])
7086 Returns HTML for a 'Select all' link that uses Javascript to select
7087 multiple checkboxes with the same name. The parameters are :
7089 =item field - Name of the checkbox inputs.
7091 =item form - Index of the form on the page.
7093 =item text - Message for the link, defaulting to 'Select all'.
7098 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7099 my ($field, $form, $text) = @_;
7101 $text ||= $text{'ui_selall'};
7102 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7105 =head2 select_invert_link(field, form, text)
7107 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7108 selection on multiple checkboxes with the same name. The parameters are :
7110 =item field - Name of the checkbox inputs.
7112 =item form - Index of the form on the page.
7114 =item text - Message for the link, defaulting to 'Invert selection'.
7117 sub select_invert_link
7119 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7120 my ($field, $form, $text) = @_;
7122 $text ||= $text{'ui_selinv'};
7123 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7126 =head2 select_rows_link(field, form, text, &rows)
7128 Returns HTML for a link that uses Javascript to select rows with particular
7129 values for their checkboxes. The parameters are :
7131 =item field - Name of the checkbox inputs.
7133 =item form - Index of the form on the page.
7135 =item text - Message for the link, de
7137 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7140 sub select_rows_link
7142 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7143 my ($field, $form, $text, $rows) = @_;
7145 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7146 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7147 $js .= "return false;";
7148 return "<a href='#' onClick='$js'>$text</a>";
7151 =head2 check_pid_file(file)
7153 Given a pid file, returns the PID it contains if the process is running.
7158 open(PIDFILE, $_[0]) || return undef;
7159 my $pid = <PIDFILE>;
7161 $pid =~ /^\s*(\d+)/ || return undef;
7162 kill(0, $1) || return undef;
7168 Return the local os-specific library name to this module. For internal use only.
7173 my $mn = &get_module_name();
7174 my $md = &module_root_directory($mn);
7175 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7176 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7178 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7179 return "$mn-$gconfig{'os_type'}-lib.pl";
7181 elsif (-r "$md/$mn-generic-lib.pl") {
7182 return "$mn-generic-lib.pl";
7189 =head2 module_root_directory(module)
7191 Given a module name, returns its root directory. On a typical Webmin install,
7192 all modules are under the same directory - but it is theoretically possible to
7196 sub module_root_directory
7198 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7199 if (@root_directories > 1) {
7200 foreach my $r (@root_directories) {
7206 return "$root_directories[0]/$d";
7209 =head2 list_mime_types
7211 Returns a list of all known MIME types and their extensions, as a list of hash
7212 references with keys :
7214 =item type - The MIME type, like text/plain.
7216 =item exts - A list of extensions, like .doc and .avi.
7218 =item desc - A human-readable description for the MIME type.
7223 if (!@list_mime_types_cache) {
7225 open(MIME, "$root_directory/mime.types");
7229 if (s/#\s*(.*)$//g) {
7232 my ($type, @exts) = split(/\s+/);
7234 push(@list_mime_types_cache, { 'type' => $type,
7241 return @list_mime_types_cache;
7244 =head2 guess_mime_type(filename, [default])
7246 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7247 The optional default parameter sets a default type of use if none is found,
7248 which defaults to application/octet-stream.
7253 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7255 foreach my $t (&list_mime_types()) {
7256 foreach my $e (@{$t->{'exts'}}) {
7257 return $t->{'type'} if (lc($e) eq lc($ext));
7261 return @_ > 1 ? $_[1] : "application/octet-stream";
7264 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7266 Opens a file handle for writing to a temporary file, which will only be
7267 renamed over the real file when the handle is closed. This allows critical
7268 files like /etc/shadow to be updated safely, even if writing fails part way
7269 through due to lack of disk space. The parameters are :
7271 =item handle - File handle to open, as you would use in Perl's open function.
7273 =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.
7275 =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 $! with the error code.
7277 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7279 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7285 # Just getting a temp file
7286 if (!defined($main::open_tempfiles{$_[0]})) {
7287 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7288 my $dir = $1 || "/";
7289 my $tmp = "$dir/$2.webmintmp.$$";
7290 $main::open_tempfiles{$_[0]} = $tmp;
7291 push(@main::temporary_files, $tmp);
7293 return $main::open_tempfiles{$_[0]};
7297 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7298 $fh = &callers_package($fh);
7300 my %gaccess = &get_module_acl(undef, "");
7301 my $db = $gconfig{'debug_what_write'};
7302 if ($file =~ /\r|\n|\0/) {
7303 if ($noerror) { return 0; }
7304 else { &error("Filename contains invalid characters"); }
7306 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7307 # Read-only mode .. veto all writes
7308 print STDERR "vetoing write to $file\n";
7309 return open($fh, ">$null_file");
7311 elsif ($file =~ /^(>|>>|)nul$/i) {
7312 # Write to Windows null device
7313 &webmin_debug_log($1 eq ">" ? "WRITE" :
7314 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7316 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7317 # Writes to /dev/null or TTYs don't need to be handled
7318 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7319 return open($fh, $file);
7321 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7322 &webmin_debug_log("WRITE", $1) if ($db);
7323 # Over-writing a file, via a temp file
7325 $file = &translate_filename($file);
7327 # Open the link target instead
7328 $file = &resolve_links($file);
7331 # Cannot open a directory!
7332 if ($noerror) { return 0; }
7333 else { &error("Cannot write to directory $file"); }
7335 my $tmp = &open_tempfile($file);
7336 my $ex = open($fh, ">$tmp");
7337 if (!$ex && $! =~ /permission/i) {
7338 # Could not open temp file .. try opening actual file
7340 $ex = open($fh, ">$file");
7341 delete($main::open_tempfiles{$file});
7344 $main::open_temphandles{$fh} = $file;
7347 if (!$ex && !$noerror) {
7348 &error(&text("efileopen", $file, $!));
7352 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7353 # Just writing direct to a file
7354 &webmin_debug_log("WRITE", $1) if ($db);
7356 $file = &translate_filename($file);
7357 my @old_attributes = &get_clear_file_attributes($file);
7358 my $ex = open($fh, ">$file");
7359 &reset_file_attributes($file, \@old_attributes);
7360 $main::open_temphandles{$fh} = $file;
7361 if (!$ex && !$noerror) {
7362 &error(&text("efileopen", $file, $!));
7367 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7368 # Appending to a file .. nothing special to do
7369 &webmin_debug_log("APPEND", $1) if ($db);
7371 $file = &translate_filename($file);
7372 my @old_attributes = &get_clear_file_attributes($file);
7373 my $ex = open($fh, ">>$file");
7374 &reset_file_attributes($file, \@old_attributes);
7375 $main::open_temphandles{$fh} = $file;
7376 if (!$ex && !$noerror) {
7377 &error(&text("efileopen", $file, $!));
7382 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7383 # Read mode .. nothing to do here
7384 &webmin_debug_log("READ", $file) if ($db);
7385 $file = &translate_filename($file);
7386 return open($fh, $file);
7388 elsif ($file eq ">" || $file eq ">>") {
7389 my ($package, $filename, $line) = caller;
7390 if ($noerror) { return 0; }
7391 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7394 my ($package, $filename, $line) = caller;
7395 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7400 =head2 close_tempfile(file|handle)
7402 Copies a temp file to the actual file, assuming that all writes were
7403 successful. The handle must have been one passed to open_tempfile.
7409 my $fh = &callers_package($_[0]);
7411 if (defined($file = $main::open_temphandles{$fh})) {
7413 close($fh) || &error(&text("efileclose", $file, $!));
7414 delete($main::open_temphandles{$fh});
7415 return &close_tempfile($file);
7417 elsif (defined($main::open_tempfiles{$_[0]})) {
7419 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7420 my @st = stat($_[0]);
7421 if (&is_selinux_enabled() && &has_command("chcon")) {
7422 # Set original security context
7423 system("chcon --reference=".quotemeta($_[0]).
7424 " ".quotemeta($main::open_tempfiles{$_[0]}).
7425 " >/dev/null 2>&1");
7427 my @old_attributes = &get_clear_file_attributes($_[0]);
7428 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7430 # Set original permissions and ownership
7431 chmod($st[2], $_[0]);
7432 chown($st[4], $st[5], $_[0]);
7434 &reset_file_attributes($_[0], \@old_attributes);
7435 delete($main::open_tempfiles{$_[0]});
7436 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7437 if ($main::open_templocks{$_[0]}) {
7438 &unlock_file($_[0]);
7439 delete($main::open_templocks{$_[0]});
7444 # Must be closing a handle not associated with a file
7450 =head2 print_tempfile(handle, text, ...)
7452 Like the normal print function, but calls &error on failure. Useful when
7453 combined with open_tempfile, to ensure that a criticial file is never
7454 only partially written.
7459 my ($fh, @args) = @_;
7460 $fh = &callers_package($fh);
7461 (print $fh @args) || &error(&text("efilewrite",
7462 $main::open_temphandles{$fh} || $fh, $!));
7465 =head2 is_selinux_enabled
7467 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7470 sub is_selinux_enabled
7472 if (!defined($main::selinux_enabled_cache)) {
7474 if ($gconfig{'os_type'} !~ /-linux$/) {
7475 # Not on linux, so no way
7476 $main::selinux_enabled_cache = 0;
7478 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7479 # Use global config file
7480 $main::selinux_enabled_cache =
7481 $seconfig{'SELINUX'} eq 'disabled' ||
7482 !$seconfig{'SELINUX'} ? 0 : 1;
7485 # Use selinuxenabled command
7486 #$selinux_enabled_cache =
7487 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7488 $main::selinux_enabled_cache = 0;
7491 return $main::selinux_enabled_cache;
7494 =head2 get_clear_file_attributes(file)
7496 Finds file attributes that may prevent writing, clears them and returns them
7497 as a list. May call error. Mainly for internal use by open_tempfile and
7501 sub get_clear_file_attributes
7505 if ($gconfig{'chattr'}) {
7506 # Get original immutable bit
7507 my $out = &backquote_command(
7508 "lsattr ".quotemeta($file)." 2>/dev/null");
7510 $out =~ s/\s\S+\n//;
7511 @old_attributes = grep { $_ ne '-' } split(//, $out);
7513 if (&indexof("i", @old_attributes) >= 0) {
7514 my $err = &backquote_logged(
7515 "chattr -i ".quotemeta($file)." 2>&1");
7517 &error("Failed to remove immutable bit on ".
7522 return @old_attributes;
7525 =head2 reset_file_attributes(file, &attributes)
7527 Put back cleared attributes on some file. May call error. Mainly for internal
7528 use by close_tempfile.
7531 sub reset_file_attributes
7533 my ($file, $old_attributes) = @_;
7534 if (&indexof("i", @$old_attributes) >= 0) {
7535 my $err = &backquote_logged(
7536 "chattr +i ".quotemeta($file)." 2>&1");
7538 &error("Failed to restore immutable bit on ".
7544 =head2 cleanup_tempnames
7546 Remove all temporary files generated using transname. Typically only called
7547 internally when a Webmin script exits.
7550 sub cleanup_tempnames
7552 foreach my $t (@main::temporary_files) {
7555 @main::temporary_files = ( );
7558 =head2 open_lock_tempfile([handle], file, [no-error])
7560 Returns a temporary file for writing to some actual file, and also locks it.
7561 Effectively the same as calling lock_file and open_tempfile on the same file,
7562 but calls the unlock for you automatically when it is closed.
7565 sub open_lock_tempfile
7567 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7568 $fh = &callers_package($fh);
7569 my $lockfile = $file;
7570 $lockfile =~ s/^[^\/]*//;
7571 if ($lockfile =~ /^\//) {
7572 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7574 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7579 $main::end_exit_status ||= $?;
7580 if ($$ == $main::initial_process_id) {
7581 # Exiting from initial process
7582 &cleanup_tempnames();
7583 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7584 $main::debug_log_start_module eq &get_module_name()) {
7585 my $len = time() - $main::debug_log_start_time;
7586 &webmin_debug_log("STOP", "runtime=$len");
7587 $main::debug_log_start_time = 0;
7589 if (!$ENV{'SCRIPT_NAME'} &&
7590 $main::initial_module_name eq &get_module_name()) {
7591 # In a command-line script - call the real exit, so that the
7592 # exit status gets properly propogated. In some cases this
7593 # was not happening.
7594 exit($main::end_exit_status);
7599 =head2 month_to_number(month)
7601 Converts a month name like feb to a number like 1.
7606 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7609 =head2 number_to_month(number)
7611 Converts a number like 1 to a month name like Feb.
7616 return ucfirst($number_to_month_map{$_[0]});
7619 =head2 get_rbac_module_acl(user, module)
7621 Returns a hash reference of RBAC overrides ACLs for some user and module.
7622 May return undef if none exist (indicating access denied), or the string *
7623 if full access is granted.
7626 sub get_rbac_module_acl
7628 my ($user, $mod) = @_;
7629 eval "use Authen::SolarisRBAC";
7630 return undef if ($@);
7633 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7634 # Automagic webmin.modulename.admin authorization exists .. allow access
7636 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7637 %rv = ( 'noconfig' => 1 );
7644 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7648 my ($auths, $acls) = split(/\s+/, $_);
7649 my @auths = split(/,/, $auths);
7651 my ($merge) = ($acls =~ s/^\+//);
7653 if ($auths eq "*") {
7654 # These ACLs apply to all RBAC users.
7655 # Only if there is some that match a specific authorization
7656 # later will they be used though.
7659 # Check each of the RBAC authorizations
7660 foreach my $a (@auths) {
7661 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7666 $foundany++ if ($gotall);
7669 # Found an RBAC authorization - return the ACLs
7670 return "*" if ($acls eq "*");
7671 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7673 # Just add to current set
7674 foreach my $a (keys %acl) {
7685 return !$foundany ? undef : %rv ? \%rv : undef;
7688 =head2 supports_rbac([module])
7690 Returns 1 if RBAC client support is available, such as on Solaris.
7695 return 0 if ($gconfig{'os_type'} ne 'solaris');
7696 eval "use Authen::SolarisRBAC";
7699 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7704 =head2 use_rbac_module_acl(user, module)
7706 Returns 1 if some user should use RBAC to get permissions for a module
7709 sub use_rbac_module_acl
7711 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7712 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7713 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7714 my %access = &get_module_acl($u, $m, 1);
7715 return $access{'rbac'} ? 1 : 0;
7718 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7720 Runs some command, possibly feeding it input and capturing output to the
7721 give files or scalar references. The parameters are :
7723 =item command - Full command to run, possibly including shell meta-characters.
7725 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7727 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7729 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7731 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7733 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7738 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7739 if (&is_readonly_mode() && !$safe) {
7740 print STDERR "Vetoing command $_[0]\n";
7744 $cmd = &translate_command($cmd);
7746 # Use ` operator where possible
7747 if (!$stdin && ref($stdout) && !$stderr) {
7748 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7749 $$stdout = `$cmd 2>$null_file`;
7752 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7753 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7754 $$stdout = `$cmd 2>&1`;
7757 elsif (!$stdin && !$stdout && !$stderr) {
7758 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7759 return system("$cmd >$null_file 2>$null_file <$null_file");
7761 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7764 $| = 1; # needed on some systems to flush before forking
7765 pipe(EXECSTDINr, EXECSTDINw);
7766 pipe(EXECSTDOUTr, EXECSTDOUTw);
7767 pipe(EXECSTDERRr, EXECSTDERRw);
7769 if (!($pid = fork())) {
7773 open(STDIN, "<&EXECSTDINr");
7774 open(STDOUT, ">&EXECSTDOUTw");
7775 if (ref($stderr) && $stderr eq $stdout) {
7776 open(STDERR, ">&EXECSTDOUTw");
7779 open(STDERR, ">&EXECSTDERRw");
7786 my $fullcmd = "($cmd)";
7787 if ($stdin && !ref($stdin)) {
7788 $fullcmd .= " <$stdin";
7790 if ($stdout && !ref($stdout)) {
7791 $fullcmd .= " >$stdout";
7793 if ($stderr && !ref($stderr)) {
7794 if ($stderr eq $stdout) {
7795 $fullcmd .= " 2>&1";
7798 $fullcmd .= " 2>$stderr";
7801 if ($gconfig{'os_type'} eq 'windows') {
7805 exec("/bin/sh", "-c", $fullcmd);
7807 print "Exec failed : $!\n";
7814 # Feed input and capture output
7816 if ($stdin && ref($stdin)) {
7817 print EXECSTDINw $$stdin;
7820 if ($stdout && ref($stdout)) {
7822 while(<EXECSTDOUTr>) {
7827 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7829 while(<EXECSTDERRr>) {
7840 =head2 open_readfile(handle, file)
7842 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7843 exactly the same as Perl's open function.
7848 my ($fh, $file) = @_;
7849 $fh = &callers_package($fh);
7850 my $realfile = &translate_filename($file);
7851 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7852 return open($fh, "<".$realfile);
7855 =head2 open_execute_command(handle, command, output?, safe?)
7857 Runs some command, with the specified file handle set to either write to it if
7858 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7859 indicates if the command modifies the state of the system or not.
7862 sub open_execute_command
7864 my ($fh, $cmd, $mode, $safe) = @_;
7865 $fh = &callers_package($fh);
7866 my $realcmd = &translate_command($cmd);
7867 if (&is_readonly_mode() && !$safe) {
7868 # Don't actually run it
7869 print STDERR "vetoing command $cmd\n";
7872 return open($fh, ">$null_file");
7875 return open($fh, $null_file);
7879 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7880 if ($gconfig{'debug_what_cmd'});
7882 return open($fh, "| $cmd");
7884 elsif ($mode == 1) {
7885 return open($fh, "$cmd 2>$null_file |");
7887 elsif ($mode == 2) {
7888 return open($fh, "$cmd 2>&1 |");
7892 =head2 translate_filename(filename)
7894 Applies all relevant registered translation functions to a filename. Mostly
7895 for internal use, and typically does nothing.
7898 sub translate_filename
7900 my ($realfile) = @_;
7901 my @funcs = grep { $_->[0] eq &get_module_name() ||
7902 !defined($_->[0]) } @main::filename_callbacks;
7903 foreach my $f (@funcs) {
7905 $realfile = &$func($realfile, @{$f->[2]});
7910 =head2 translate_command(filename)
7912 Applies all relevant registered translation functions to a command. Mostly
7913 for internal use, and typically does nothing.
7916 sub translate_command
7919 my @funcs = grep { $_->[0] eq &get_module_name() ||
7920 !defined($_->[0]) } @main::command_callbacks;
7921 foreach my $f (@funcs) {
7923 $realcmd = &$func($realcmd, @{$f->[2]});
7928 =head2 register_filename_callback(module|undef, &function, &args)
7930 Registers some function to be called when the specified module (or all
7931 modules) tries to open a file for reading and writing. The function must
7932 return the actual file to open. This allows you to override which files
7933 other code actually operates on, via the translate_filename function.
7936 sub register_filename_callback
7938 my ($mod, $func, $args) = @_;
7939 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7942 =head2 register_command_callback(module|undef, &function, &args)
7944 Registers some function to be called when the specified module (or all
7945 modules) tries to execute a command. The function must return the actual
7946 command to run. This allows you to override which commands other other code
7947 actually runs, via the translate_command function.
7950 sub register_command_callback
7952 my ($mod, $func, $args) = @_;
7953 push(@main::command_callbacks, [ $mod, $func, $args ]);
7956 =head2 capture_function_output(&function, arg, ...)
7958 Captures output that some function prints to STDOUT, and returns it. Useful
7959 for functions outside your control that print data when you really want to
7960 manipulate it before output.
7963 sub capture_function_output
7965 my ($func, @args) = @_;
7966 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
7967 my $old = select(SOCKET1);
7968 my @rv = &$func(@args);
7977 return wantarray ? ($out, \@rv) : $out;
7980 =head2 capture_function_output_tempfile(&function, arg, ...)
7982 Behaves the same as capture_function_output, but uses a temporary file
7983 to avoid buffer full problems.
7986 sub capture_function_output_tempfile
7988 my ($func, @args) = @_;
7989 my $temp = &transname();
7990 open(BUFFER, ">$temp");
7991 my $old = select(BUFFER);
7992 my @rv = &$func(@args);
7995 my $out = &read_file_contents($temp);
7996 &unlink_file($temp);
7997 return wantarray ? ($out, \@rv) : $out;
8000 =head2 modules_chooser_button(field, multiple, [form])
8002 Returns HTML for a button for selecting one or many Webmin modules.
8003 field - Name of the HTML field to place the module names into.
8004 multiple - Set to 1 if multiple modules can be selected.
8005 form - Index of the form on the page.
8008 sub modules_chooser_button
8010 return &theme_modules_chooser_button(@_)
8011 if (defined(&theme_modules_chooser_button));
8012 my $form = defined($_[2]) ? $_[2] : 0;
8013 my $w = $_[1] ? 700 : 500;
8015 if ($_[1] && $gconfig{'db_sizemodules'}) {
8016 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8018 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8019 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8021 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";
8024 =head2 substitute_template(text, &hash)
8026 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8027 the text replaces it with the value of the hash key foo. Also supports blocks
8028 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8029 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8032 sub substitute_template
8034 # Add some extra fixed parameters to the hash
8035 my %hash = %{$_[1]};
8036 $hash{'hostname'} = &get_system_hostname();
8037 $hash{'webmin_config'} = $config_directory;
8038 $hash{'webmin_etc'} = $config_directory;
8039 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8040 $hash{'webmin_var'} = $var_directory;
8042 # Add time-based parameters, for use in DNS
8043 $hash{'current_time'} = time();
8044 my @tm = localtime($hash{'current_time'});
8045 $hash{'current_year'} = $tm[5]+1900;
8046 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8047 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8048 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8049 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8050 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8052 # Actually do the substition
8054 foreach my $s (keys %hash) {
8055 next if ($s eq ''); # Prevent just $ from being subbed
8058 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8059 $rv =~ s/\$\Q$us\E/$sv/g;
8061 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8062 # and ${IF}..${ENDIF} with value
8063 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8064 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8066 # Replace $IF..$ELSE..$ENDIF block with first value,
8067 # and $IF..$ENDIF with value
8068 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8069 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8071 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8072 # matching, nothing if not
8073 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8074 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8076 # Replace $IFEQ..$ENDIFEQ block with first value if
8077 # matching, nothing if not
8078 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8079 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8082 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8083 # and ${IF}..${ENDIF} with nothing
8084 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8085 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8087 # Replace $IF..$ELSE..$ENDIF block with second value,
8088 # and $IF..$ENDIF with nothing
8089 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8090 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8092 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8093 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8094 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8098 # Now assume any $IF blocks whose variables are not present in the hash
8099 # evaluate to false.
8100 # $IF...$ELSE x $ENDIF => x
8101 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8102 # $IF...x...$ENDIF => (nothing)
8103 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8104 # ${var} => (nothing)
8105 $rv =~ s/\$\{[A-Z]+\}//g;
8110 =head2 running_in_zone
8112 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8113 disable module and features that are not appropriate, like those that modify
8114 mounted filesystems.
8119 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8120 $gconfig{'os_version'} < 10);
8121 my $zn = `zonename 2>$null_file`;
8123 return $zn && $zn ne "global";
8126 =head2 running_in_vserver
8128 Returns 1 if the current Webmin instance is running in a Linux VServer.
8129 Used to disable modules and features that are not appropriate.
8132 sub running_in_vserver
8134 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8137 open(MTAB, "/etc/mtab");
8139 my ($dev, $mp) = split(/\s+/, $_);
8140 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8149 =head2 running_in_xen
8151 Returns 1 if Webmin is running inside a Xen instance, by looking
8152 at /proc/xen/capabilities.
8157 return 0 if (!-r "/proc/xen/capabilities");
8158 my $cap = &read_file_contents("/proc/xen/capabilities");
8159 return $cap =~ /control_d/ ? 0 : 1;
8162 =head2 running_in_openvz
8164 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8165 at /proc/vz/veinfo for a non-zero line.
8168 sub running_in_openvz
8170 return 0 if (!-r "/proc/vz/veinfo");
8171 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8172 return 0 if (!$lref || !@$lref);
8173 foreach my $l (@$lref) {
8175 my @ll = split(/\s+/, $l);
8176 return 0 if ($ll[0] eq '0');
8181 =head2 list_categories(&modules, [include-empty])
8183 Returns a hash mapping category codes to names, including any custom-defined
8184 categories. The modules parameter must be an array ref of module hash objects,
8185 as returned by get_all_module_infos.
8190 my ($mods, $empty) = @_;
8191 my (%cats, %catnames);
8192 &read_file("$config_directory/webmin.catnames", \%catnames);
8193 foreach my $o (@lang_order_list) {
8194 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8199 foreach my $m (@$mods) {
8200 my $c = $m->{'category'};
8201 next if ($cats{$c});
8202 if (defined($catnames{$c})) {
8203 $cats{$c} = $catnames{$c};
8205 elsif ($text{"category_$c"}) {
8206 $cats{$c} = $text{"category_$c"};
8209 # try to get category name from module ..
8210 my %mtext = &load_language($m->{'dir'});
8211 if ($mtext{"category_$c"}) {
8212 $cats{$c} = $mtext{"category_$c"};
8215 $c = $m->{'category'} = "";
8216 $cats{$c} = $text{"category_$c"};
8223 =head2 is_readonly_mode
8225 Returns 1 if the current user is in read-only mode, and thus all writes
8226 to files and command execution should fail.
8229 sub is_readonly_mode
8231 if (!defined($main::readonly_mode_cache)) {
8232 my %gaccess = &get_module_acl(undef, "");
8233 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8235 return $main::readonly_mode_cache;
8238 =head2 command_as_user(user, with-env?, command, ...)
8240 Returns a command to execute some command as the given user, using the
8241 su statement. If on Linux, the /bin/sh shell is forced in case the user
8242 does not have a valid shell. If with-env is set to 1, the -s flag is added
8243 to the su command to read the user's .profile or .bashrc file.
8248 my ($user, $env, @args) = @_;
8249 my @uinfo = getpwnam($user);
8250 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8251 # User shell doesn't appear to be valid
8252 if ($gconfig{'os_type'} =~ /-linux$/) {
8253 # Use -s /bin/sh to force it
8254 $shellarg = " -s /bin/sh";
8256 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8257 $gconfig{'os_type'} eq 'solaris' &&
8258 $gconfig{'os_version'} >= 11 ||
8259 $gconfig{'os_type'} eq 'macos') {
8260 # Use -m and force /bin/sh
8261 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8265 my $rv = "su".($env ? " -" : "").$shellarg.
8266 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8270 =head2 list_osdn_mirrors(project, file)
8272 This function is now deprecated in favor of letting sourceforge just
8273 redirect to the best mirror, and now just returns their primary download URL.
8276 sub list_osdn_mirrors
8278 my ($project, $file) = @_;
8279 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8281 'mirror' => 'downloads' } );
8284 =head2 convert_osdn_url(url)
8286 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8287 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8288 to a real URL on the sourceforge download redirector.
8291 sub convert_osdn_url
8294 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8295 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8296 # Always use the Sourceforge mail download URL, which does
8297 # a location-based redirect for us
8298 my ($project, $file) = ($1, $2);
8299 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8301 return wantarray ? ( $url, 0 ) : $url;
8304 # Some other source .. don't change
8305 return wantarray ? ( $url, 2 ) : $url;
8309 =head2 get_current_dir
8311 Returns the directory the current process is running in.
8317 if ($gconfig{'os_type'} eq 'windows') {
8330 =head2 supports_users
8332 Returns 1 if the current OS supports Unix user concepts and functions like
8333 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8339 return $gconfig{'os_type'} ne 'windows';
8342 =head2 supports_symlinks
8344 Returns 1 if the current OS supports symbolic and hard links. This will not
8345 be the case on Windows.
8348 sub supports_symlinks
8350 return $gconfig{'os_type'} ne 'windows';
8353 =head2 quote_path(path)
8355 Returns a path with safe quoting for the current operating system.
8361 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8362 # Windows only supports "" style quoting
8366 return quotemeta($path);
8370 =head2 get_windows_root
8372 Returns the base windows system directory, like c:/windows.
8375 sub get_windows_root
8377 if ($ENV{'SystemRoot'}) {
8378 my $rv = $ENV{'SystemRoot'};
8383 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8387 =head2 read_file_contents(file)
8389 Given a filename, returns its complete contents as a string. Effectively
8390 the same as the Perl construct `cat file`.
8393 sub read_file_contents
8395 &open_readfile(FILE, $_[0]) || return undef;
8402 =head2 unix_crypt(password, salt)
8404 Performs Unix encryption on a password, using the built-in crypt function or
8405 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8406 must be either an already-hashed password, or a two-character alpha-numeric
8412 my ($pass, $salt) = @_;
8413 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8414 my $rv = eval "crypt(\$pass, \$salt)";
8416 return $rv if ($rv && !$@);
8417 eval "use Crypt::UnixCrypt";
8419 return Crypt::UnixCrypt::crypt($pass, $salt);
8422 &error("Failed to encrypt password : $err");
8426 =head2 split_quoted_string(string)
8428 Given a string like I<foo "bar baz" quux>, returns the array :
8432 sub split_quoted_string
8436 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8437 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8438 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8445 =head2 write_to_http_cache(url, file|&data)
8447 Updates the Webmin cache with the contents of the given file, possibly also
8448 clearing out old data. Mainly for internal use by http_download.
8451 sub write_to_http_cache
8453 my ($url, $file) = @_;
8454 return 0 if (!$gconfig{'cache_size'});
8456 # Don't cache downloads that look dynamic
8457 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8461 # Check if the current module should do caching
8462 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8463 # Caching all except some modules
8464 my @mods = split(/\s+/, $1);
8465 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8467 elsif ($gconfig{'cache_mods'}) {
8468 # Only caching some modules
8469 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8470 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8476 $size = length($$file);
8479 my @st = stat($file);
8483 if ($size > $gconfig{'cache_size'}) {
8484 # Bigger than the whole cache - so don't save it
8489 $cfile = "$main::http_cache_directory/$cfile";
8491 # See how much we have cached currently, clearing old files
8493 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8494 opendir(CACHEDIR, $main::http_cache_directory);
8495 foreach my $f (readdir(CACHEDIR)) {
8496 next if ($f eq "." || $f eq "..");
8497 my $path = "$main::http_cache_directory/$f";
8498 my @st = stat($path);
8499 if ($gconfig{'cache_days'} &&
8500 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8501 # This file is too old .. trash it
8506 push(@cached, [ $path, $st[7], $st[9] ]);
8510 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8511 while($total+$size > $gconfig{'cache_size'} && @cached) {
8512 # Cache is too big .. delete some files until the new one will fit
8513 unlink($cached[0]->[0]);
8514 $total -= $cached[0]->[1];
8518 # Finally, write out the new file
8520 &open_tempfile(CACHEFILE, ">$cfile");
8521 &print_tempfile(CACHEFILE, $$file);
8522 &close_tempfile(CACHEFILE);
8525 my ($ok, $err) = ©_source_dest($file, $cfile);
8531 =head2 check_in_http_cache(url)
8533 If some URL is in the cache and valid, return the filename for it. Mainly
8534 for internal use by http_download.
8537 sub check_in_http_cache
8540 return undef if (!$gconfig{'cache_size'});
8542 # Check if the current module should do caching
8543 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8544 # Caching all except some modules
8545 my @mods = split(/\s+/, $1);
8546 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8548 elsif ($gconfig{'cache_mods'}) {
8549 # Only caching some modules
8550 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8551 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8556 $cfile = "$main::http_cache_directory/$cfile";
8557 my @st = stat($cfile);
8558 return undef if (!@st || !$st[7]);
8559 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8564 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8569 =head2 supports_javascript
8571 Returns 1 if the current browser is assumed to support javascript.
8574 sub supports_javascript
8576 if (defined(&theme_supports_javascript)) {
8577 return &theme_supports_javascript();
8579 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8582 =head2 get_module_name
8584 Returns the name of the Webmin module that called this function. For internal
8585 use only by other API functions.
8590 return &get_module_variable('$module_name');
8593 =head2 get_module_variable(name, [ref])
8595 Returns the value of some variable which is set in the caller's context, if
8596 using the new WebminCore package. For internal use only.
8599 sub get_module_variable
8601 my ($v, $wantref) = @_;
8602 my $slash = $wantref ? "\\" : "";
8603 my $thispkg = &web_libs_package();
8604 if ($thispkg eq 'WebminCore') {
8605 my ($vt, $vn) = split('', $v, 2);
8607 for(my $i=0; ($callpkg) = caller($i); $i++) {
8608 last if ($callpkg ne $thispkg);
8610 return eval "${slash}${vt}${callpkg}::${vn}";
8612 return eval "${slash}${v}";
8615 =head2 clear_time_locale()
8617 Temporarily force the locale to C, until reset_time_locale is called. This is
8618 useful if your code is going to call C<strftime> from the POSIX package, and
8619 you want to ensure that the output is in a consistent format.
8622 sub clear_time_locale
8624 if ($main::clear_time_locale_count == 0) {
8627 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8628 POSIX::setlocale(POSIX::LC_TIME, "C");
8631 $main::clear_time_locale_count++;
8634 =head2 reset_time_locale()
8636 Revert the locale to whatever it was before clear_time_locale was called
8639 sub reset_time_locale
8641 if ($main::clear_time_locale_count == 1) {
8643 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8644 $main::clear_time_locale_old = undef;
8647 $main::clear_time_locale_count--;
8650 =head2 callers_package(filehandle)
8652 Convert a non-module filehandle like FOO to one qualified with the
8653 caller's caller's package, like fsdump::FOO. For internal use only.
8659 my $callpkg = (caller(1))[0];
8660 my $thispkg = &web_libs_package();
8661 if (!ref($fh) && $fh !~ /::/ &&
8662 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8663 $fh = $callpkg."::".$fh;
8668 =head2 web_libs_package()
8670 Returns the package this code is in. We can't always trust __PACKAGE__. For
8674 sub web_libs_package
8676 if ($called_from_webmin_core) {
8677 return "WebminCore";
8682 $done_web_lib_funcs = 1;