1 =head1 web-lib-funcs.pl
3 Common functions for Webmin CGI scripts. This file gets in-directly included
4 by all scripts that use web-lib.pl.
9 ui_print_header(undef, 'My Module', '');
10 print 'This is Webmin version ',get_webmin_version(),'<p>\n';
19 $ipv6_module_error = $@;
21 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
22 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
23 %done_foreign_require $webmin_feedback_address
24 $user_skill_level $pragma_no_cache $foreign_args);
26 use vars qw($module_index_name $number_to_month_map $month_to_number_map
27 $umask_already $default_charset $licence_status $os_type
28 $licence_message $script_name $loaded_theme_oo_library
29 $done_web_lib_funcs $os_version $module_index_link
30 $called_from_webmin_core $ipv6_module_error);
32 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
34 Fill the given hash reference with name=value pairs from a file. The required
37 =item file - The file to head, which must be text with each line like name=value
39 =item hash - The hash reference to add values read from the file to.
41 =item order - If given, an array reference to add names to in the order they were read
43 =item lowercase - If set to 1, names are converted to lower case
45 =item split-char - If set, names and values are split on this character instead of =
51 my $split = defined($_[4]) ? $_[4] : "=";
52 my $realfile = &translate_filename($_[0]);
53 &open_readfile(ARFILE, $_[0]) || return 0;
56 my $hash = index($_, "#");
57 my $eq = index($_, $split);
58 if ($hash != 0 && $eq >= 0) {
59 my $n = substr($_, 0, $eq);
60 my $v = substr($_, $eq+1);
62 $_[1]->{$_[3] ? lc($n) : $n} = $v;
63 push(@{$_[2]}, $n) if ($_[2]);
67 $main::read_file_missing{$realfile} = 0; # It exists now
68 if (defined($main::read_file_cache{$realfile})) {
69 %{$main::read_file_cache{$realfile}} = %{$_[1]};
74 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
76 Like read_file, but reads from an in-memory cache if the file has already been
77 read in this Webmin script. Recommended, as it behaves exactly the same as
78 read_file, but can be much faster.
83 my $realfile = &translate_filename($_[0]);
84 if (defined($main::read_file_cache{$realfile})) {
86 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
89 elsif ($main::read_file_missing{$realfile}) {
90 # Doesn't exist, so don't re-try read
94 # Actually read the file
96 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
97 %{$main::read_file_cache{$realfile}} = %d;
98 %{$_[1]} = ( %{$_[1]}, %d );
102 # Flag as non-existant
103 $main::read_file_missing{$realfile} = 1;
109 =head2 read_file_cached_with_stat(file, &hash, [&order], [lowercase], [split-char])
111 Like read_file, but reads from an in-memory cache if the file has already been
112 read in this Webmin script AND has not changed.
115 sub read_file_cached_with_stat
117 my $realfile = &translate_filename($_[0]);
118 my $t = $main::read_file_cache_time{$realfile};
119 my @st = stat($realfile);
120 if ($t && $st[9] != $t) {
121 # Changed, invalidate cache
122 delete($main::read_file_cache{$realfile});
124 my $rv = &read_file_cached(@_);
125 $main::read_file_cache_time{$realfile} = $st[9];
129 =head2 write_file(file, &hash, [join-char])
131 Write out the contents of a hash as name=value lines. The parameters are :
133 =item file - Full path to write to
135 =item hash - A hash reference containing names and values to output
137 =item join-char - If given, names and values are separated by this instead of =
143 my $join = defined($_[2]) ? $_[2] : "=";
144 my $realfile = &translate_filename($_[0]);
145 &read_file($_[0], \%old, \@order);
146 &open_tempfile(ARFILE, ">$_[0]");
147 foreach $k (@order) {
148 if (exists($_[1]->{$k})) {
149 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
150 &error(&text("efilewrite", $realfile, $!));
153 foreach $k (keys %{$_[1]}) {
154 if (!exists($old{$k})) {
155 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
156 &error(&text("efilewrite", $realfile, $!));
159 &close_tempfile(ARFILE);
160 if (defined($main::read_file_cache{$realfile})) {
161 %{$main::read_file_cache{$realfile}} = %{$_[1]};
163 if (defined($main::read_file_missing{$realfile})) {
164 $main::read_file_missing{$realfile} = 0;
168 =head2 html_escape(string)
170 Converts &, < and > codes in text to HTML entities, and returns the new string.
171 This should be used when including data read from other sources in HTML pages.
180 $tmp =~ s/\"/"/g;
181 $tmp =~ s/\'/'/g;
186 =head2 quote_escape(string, [only-quote])
188 Converts ' and " characters in a string into HTML entities, and returns it.
189 Useful for outputing HTML tag values.
194 my ($tmp, $only) = @_;
195 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
196 # convert &, unless it is part of &#nnn; or &foo;
197 $tmp =~ s/&([^#])/&$1/g;
199 $tmp =~ s/&$/&/g;
200 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
201 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
205 =head2 tempname([filename])
207 Returns a mostly random temporary file name, typically under the /tmp/.webmin
208 directory. If filename is given, this will be the base name used. Otherwise
209 a unique name is selected randomly.
214 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
215 $gconfig{'tempdir_'.&get_module_name()} :
216 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
217 $ENV{'TEMP'} ? $ENV{'TEMP'} :
218 $ENV{'TMP'} ? $ENV{'TMP'} :
219 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
220 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
221 "$remote_user_info[7]/.tmp" :
222 @remote_user_info ? $tmp_base."-".$remote_user :
223 $< != 0 ? $tmp_base."-".getpwuid($<) :
225 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
226 # On Windows system, just create temp dir if missing
228 mkdir($tmp_dir, 0755) ||
229 &error("Failed to create temp directory $tmp_dir : $!");
233 # On Unix systems, need to make sure temp dir is valid
235 while($tries++ < 10) {
236 my @st = lstat($tmp_dir);
237 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
239 unlink($tmp_dir) || rmdir($tmp_dir) ||
240 system("/bin/rm -rf ".quotemeta($tmp_dir));
242 mkdir($tmp_dir, 0755) || next;
243 chown($<, $(, $tmp_dir);
244 chmod(0755, $tmp_dir);
247 my @st = lstat($tmp_dir);
248 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
252 if (defined($_[0]) && $_[0] !~ /\.\./) {
253 $rv = "$tmp_dir/$_[0]";
256 $main::tempfilecount++;
258 $rv = $tmp_dir."/".int(rand(1000000))."_".
259 $main::tempfilecount."_".$scriptname;
264 =head2 transname([filename])
266 Behaves exactly like tempname, but records the temp file for deletion when the
267 current Webmin script process exits.
272 my $rv = &tempname(@_);
273 push(@main::temporary_files, $rv);
277 =head2 trunc(string, maxlen)
279 Truncates a string to the shortest whole word less than or equal to the
280 given width. Useful for word wrapping.
285 if (length($_[0]) <= $_[1]) {
288 my $str = substr($_[0],0,$_[1]);
297 =head2 indexof(string, value, ...)
299 Returns the index of some value in an array of values, or -1 if it was not
305 for(my $i=1; $i <= $#_; $i++) {
306 if ($_[$i] eq $_[0]) { return $i - 1; }
311 =head2 indexoflc(string, value, ...)
313 Like indexof, but does a case-insensitive match
318 my $str = lc(shift(@_));
319 my @arr = map { lc($_) } @_;
320 return &indexof($str, @arr);
323 =head2 sysprint(handle, [string]+)
325 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
326 as a replacement for print when writing to pipes or sockets.
331 my $fh = &callers_package($_[0]);
332 my $str = join('', @_[1..$#_]);
333 syswrite $fh, $str, length($str);
336 =head2 check_ipaddress(ip)
338 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
343 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
344 $1 >= 0 && $1 <= 255 &&
345 $2 >= 0 && $2 <= 255 &&
346 $3 >= 0 && $3 <= 255 &&
347 $4 >= 0 && $4 <= 255;
350 =head2 check_ip6address(ip)
352 Check if some IPv6 address is properly formatted, and returns 1 if so.
357 my @blocks = split(/:/, $_[0]);
358 return 0 if (@blocks == 0 || @blocks > 8);
360 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
361 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
362 # value is in [0;128].
364 my $where = index($blocks[$ib],"/");
367 my $b = substr($blocks[$ib],0,$where);
368 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
372 # The netmask must take its value in [0;128]
373 return 0 if ($m <0 || $m >128);
375 # Check the different blocks of the address : 16 bits block in hexa notation.
376 # Possibility of 1 empty block or 2 if the address begins with "::".
379 foreach $b (@blocks) {
380 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
381 $empty++ if ($b eq "");
383 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
389 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
391 Prints HTML for an icon image. The parameters are :
393 =item image - URL for the image, like images/foo.gif
395 =item title - Text to appear under the icon
397 =item link - Optional destination for the icon's link
399 =item href - Other HTML attributes to be added to the <a href> for the link
401 =item width - Optional width of the icon
403 =item height - Optional height of the icon
405 =item before-title - HTML to appear before the title link, but which is not actually in the link
407 =item after-title - HTML to appear after the title link, but which is not actually in the link
412 &load_theme_library();
413 if (defined(&theme_generate_icon)) {
414 &theme_generate_icon(@_);
417 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
418 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
419 if ($tconfig{'noicons'}) {
421 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
424 print "$_[6]$_[1]$_[7]\n";
428 print "<table border><tr><td width=48 height=48>\n",
429 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
430 "$w $h></a></td></tr></table>\n";
431 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
434 print "<table border><tr><td width=48 height=48>\n",
435 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
436 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
442 Converts a string to a form ok for putting in a URL, using % escaping.
448 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
452 =head2 un_urlize(string)
454 Converts a URL-encoded string to it's original contents - the reverse of the
462 $rv =~ s/%(..)/pack("c",hex($1))/ge;
466 =head2 include(filename)
468 Read and output the contents of the given file.
474 open(INCLUDE, &translate_filename($_[0])) || return 0;
482 =head2 copydata(in-handle, out-handle)
484 Read from one file handle and write to another, until there is no more to read.
490 $in = &callers_package($in);
491 $out = &callers_package($out);
493 while(read($in, $buf, 1024) > 0) {
494 (print $out $buf) || return 0;
499 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
501 Read data submitted via a POST request using the multipart/form-data coding,
502 and store it in the global %in hash. The optional parameters are :
504 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
506 =item cbfunc - A function reference to call after reading each block of data.
508 =item cbargs - Additional parameters to the callback function.
513 my ($max, $cbfunc, $cbargs) = @_;
514 my ($boundary, $line, $foo, $name, $got, $file);
515 my $err = &text('readparse_max', $max);
516 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
517 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
520 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
522 <STDIN>; # skip first boundary
525 # Read section headers
529 $got += length($line);
530 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
531 if ($max && $got > $max) {
536 if ($line =~ /^(\S+):\s*(.*)$/) {
537 $header{$lastheader = lc($1)} = $2;
539 elsif ($line =~ /^\s+(.*)$/) {
540 $header{$lastheader} .= $line;
544 # Parse out filename and type
545 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
547 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
552 $foo = $name . "_$1";
559 &error($text{'readparse_cdheader'});
561 if ($header{'content-type'} =~ /^([^\s;]+)/) {
562 $foo = $name . "_content_type";
565 $file = $in{$name."_filename"};
568 $in{$name} .= "\0" if (defined($in{$name}));
571 $got += length($line);
572 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
574 if ($max && $got > $max) {
575 #print STDERR "over limit of $max\n";
580 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
585 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
586 if (index($line, $boundary) != -1) { last; }
589 chop($in{$name}); chop($in{$name});
590 if (index($line,"$boundary--") != -1) { last; }
592 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
595 =head2 ReadParse([&hash], [method], [noplus])
597 Fills the given hash reference with CGI parameters, or uses the global hash
598 %in if none is given. Also sets the global variables $in and @in. The other
601 =item method - For use of this HTTP method, such as GET
603 =item noplus - Don't convert + in parameters to spaces.
608 my $a = $_[0] || \%in;
610 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
612 if ($meth eq 'POST') {
613 my $clen = $ENV{'CONTENT_LENGTH'};
614 &read_fully(STDIN, \$in, $clen) == $clen ||
615 &error("Failed to read POST input : $!");
617 if ($ENV{'QUERY_STRING'}) {
618 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
619 else { $in = $ENV{'QUERY_STRING'}; }
621 @in = split(/\&/, $in);
622 foreach my $i (@in) {
623 my ($k, $v) = split(/=/, $i, 2);
628 $k =~ s/%(..)/pack("c",hex($1))/ge;
629 $v =~ s/%(..)/pack("c",hex($1))/ge;
630 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
634 =head2 read_fully(fh, &buffer, length)
636 Read data from some file handle up to the given length, even in the face
637 of partial reads. Reads the number of bytes read. Stores received data in the
638 string pointed to be the buffer reference.
643 my ($fh, $buf, $len) = @_;
644 $fh = &callers_package($fh);
647 my $r = read(STDIN, $$buf, $len-$got, $got);
654 =head2 read_parse_mime_callback(size, totalsize, upload-id)
656 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
657 the file on every 1% change though. For internal use by the upload progress
661 sub read_parse_mime_callback
663 my ($size, $totalsize, $filename, $id) = @_;
664 return if ($gconfig{'no_upload_tracker'});
667 # Create the upload tracking directory - if running as non-root, this has to
668 # be under the user's home
671 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
672 $vardir = "$uinfo[7]/.tmp";
675 $vardir = $ENV{'WEBMIN_VAR'};
678 &make_dir($vardir, 0755);
681 # Remove any upload.* files more than 1 hour old
682 if (!$main::read_parse_mime_callback_flushed) {
684 opendir(UPDIR, $vardir);
685 foreach my $f (readdir(UPDIR)) {
686 next if ($f !~ /^upload\./);
687 my @st = stat("$vardir/$f");
688 if ($st[9] < $now-3600) {
689 unlink("$vardir/$f");
693 $main::read_parse_mime_callback_flushed++;
696 # Only update file once per percent
697 my $upfile = "$vardir/upload.$id";
698 if ($totalsize && $size >= 0) {
699 my $pc = int(100 * $size / $totalsize);
700 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
703 $main::read_parse_mime_callback_pc{$upfile} = $pc;
707 &open_tempfile(UPFILE, ">$upfile");
708 print UPFILE $size,"\n";
709 print UPFILE $totalsize,"\n";
710 print UPFILE $filename,"\n";
711 &close_tempfile(UPFILE);
714 =head2 read_parse_mime_javascript(upload-id, [&fields])
716 Returns an onSubmit= Javascript statement to popup a window for tracking
717 an upload with the given ID. For internal use by the upload progress tracker.
720 sub read_parse_mime_javascript
722 my ($id, $fields) = @_;
723 return "" if ($gconfig{'no_upload_tracker'});
724 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
726 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
727 return "onSubmit='if ($if) { $opener }'";
730 return "onSubmit='$opener'";
734 =head2 PrintHeader(charset)
736 Outputs the HTTP headers for an HTML page. The optional charset parameter
737 can be used to set a character set. Normally this function is not called
738 directly, but is rather called by ui_print_header or header.
743 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
744 print "pragma: no-cache\n";
745 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
746 print "Cache-Control: no-store, no-cache, must-revalidate\n";
747 print "Cache-Control: post-check=0, pre-check=0\n";
749 if (defined($_[0])) {
750 print "Content-type: text/html; Charset=$_[0]\n\n";
753 print "Content-type: text/html\n\n";
757 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
759 Outputs a Webmin HTML page header with a title, including HTTP headers. The
762 =item title - The text to show at the top of the page
764 =item image - An image to show instead of the title text. This is typically left blank.
766 =item help - If set, this is the name of a help page that will be linked to in the title.
768 =item config - If set to 1, the title will contain a link to the module's config page.
770 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
772 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
774 =item rightside - HTML to be shown on the right-hand side of the title. Can contain multiple lines, separated by <br>. Typically this is used for links to stop, start or restart servers.
776 =item head-stuff - HTML to be included in the <head> section of the page.
778 =item body-stuff - HTML attributes to be include in the <body> tag.
780 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
785 return if ($main::done_webmin_header++);
787 my $charset = defined($main::force_charset) ? $main::force_charset
789 &PrintHeader($charset);
790 &load_theme_library();
791 if (defined(&theme_header)) {
792 $module_name = &get_module_name();
794 $miniserv::page_capture = 1;
797 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
800 if (defined(&theme_prehead)) {
804 print "<meta http-equiv=\"Content-Type\" ",
805 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
808 my $title = &get_html_title($_[0]);
809 print "<title>$title</title>\n";
810 print $_[7] if ($_[7]);
811 print &get_html_status_line(0);
813 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
814 if ($tconfig{'headinclude'}) {
815 print &read_file_contents(
816 "$theme_root_directory/$tconfig{'headinclude'}");
819 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
820 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
821 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
822 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
823 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
824 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
825 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
827 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
829 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
830 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
831 if (defined(&theme_prebody)) {
834 my $hostname = &get_display_hostname();
835 my $version = &get_webmin_version();
836 my $prebody = $tconfig{'prebody'};
838 $prebody =~ s/%HOSTNAME%/$hostname/g;
839 $prebody =~ s/%VERSION%/$version/g;
840 $prebody =~ s/%USER%/$remote_user/g;
841 $prebody =~ s/%OS%/$os_type $os_version/g;
844 if ($tconfig{'prebodyinclude'}) {
846 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
853 print $tconfig{'preheader'};
854 my %this_module_info = &get_module_info(&get_module_name());
855 print "<table class='header' width=100%><tr>\n";
856 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
857 print "<td id='headln1' colspan=3 align=center>\n";
858 print &get_html_status_line(1);
859 print "</td></tr> <tr>\n";
861 print "<td id='headln2l' width=15% valign=top align=left>";
862 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
863 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
864 "$text{'header_servers'}</a><br>\n";
866 if (!$_[5] && !$tconfig{'noindex'}) {
867 my @avail = &get_available_module_infos(1);
868 my $nolo = $ENV{'ANONYMOUS_USER'} ||
869 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
870 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
871 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
873 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
874 "$text{'main_logout'}</a><br>";
876 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
877 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
878 "$text{'main_switch'}</a><br>";
880 elsif (!$gconfig{'gotoone'} || @avail > 1) {
881 print "<a href='$gconfig{'webprefix'}/?cat=",
882 $this_module_info{'category'},
883 "'>$text{'header_webmin'}</a><br>\n";
886 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
887 my $idx = $this_module_info{'index_link'};
888 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
889 my $mt = $module_index_name || $text{'header_module'};
890 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
892 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
893 !$tconfig{'nohelp'}) {
894 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
897 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
898 !$tconfig{'nohelp'}) {
899 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
902 my %access = &get_module_acl();
903 if (!$access{'noconfig'} && !$config{'noprefs'}) {
904 my $cprog = $user_module_config_directory ?
905 "uconfig.cgi" : "config.cgi";
906 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
907 &get_module_name()."\">",
908 $text{'header_config'},"</a><br>\n";
913 # Title is a single image
914 print "<td id='headln2c' align=center width=70%>",
915 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
919 my $ts = defined($tconfig{'titlesize'}) ?
920 $tconfig{'titlesize'} : "+2";
921 print "<td id='headln2c' align=center width=70%>",
922 ($ts ? "<font size=$ts>" : ""),$_[0],
923 ($ts ? "</font>" : "");
924 print "<br>$_[9]\n" if ($_[9]);
927 print "<td id='headln2r' width=15% valign=top align=right>";
929 print "</td></tr></table>\n";
930 print $tconfig{'postheader'};
932 $miniserv::page_capture = 1;
935 =head2 get_html_title(title)
937 Returns the full string to appear in the HTML <title> block.
944 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
945 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
946 my $host = &get_display_hostname();
947 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
948 $title = sprintf "%s : %s on %s (%s %s)\n",
949 $msg, $remote_user, $host,
950 $os_type, $os_version;
952 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
953 $title = sprintf "%s on %s (%s %s)\n",
955 $os_type, $os_version;
960 if ($gconfig{'showlogin'} && $remote_user) {
961 $title = $remote_user.($title ? " : ".$title : "");
963 if ($gconfig{'showhost'}) {
964 $title = $host.($title ? " : ".$title : "");
969 =head2 get_html_framed_title
971 Returns the title text for a framed theme main page.
974 sub get_html_framed_title
977 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
978 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
980 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
981 # Alternate title mode requested
982 $title = sprintf "%s on %s (%s %s)\n",
983 $remote_user, &get_display_hostname(),
984 $os_type, $os_version;
987 # Title like 'Webmin x.yy on hostname (Linux 6)'
988 if ($os_version eq "*") {
992 $ostr = "$os_type $os_version";
994 my $host = &get_display_hostname();
995 my $ver = &get_webmin_version();
996 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
997 $gconfig{'showhost'} ? &text('main_title3', $ver, $ostr) :
998 &text('main_title', $ver, $host, $ostr);
999 if ($gconfig{'showlogin'}) {
1000 $title = $remote_user.($title ? " : ".$title : "");
1002 if ($gconfig{'showhost'}) {
1003 $title = $host.($title ? " : ".$title : "");
1009 =head2 get_html_status_line(text-only)
1011 Returns HTML for a script block that sets the status line, or if text-only
1012 is set to 1, just return the status line text.
1015 sub get_html_status_line
1017 my ($textonly) = @_;
1018 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
1019 # Disabled in this mode
1022 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
1023 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
1024 my $line = &text('header_statusmsg',
1025 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
1027 ($ENV{'SSL_USER'} ? " (SSL certified)" :
1028 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1029 $text{'programname'},
1030 &get_webmin_version(),
1031 &get_display_hostname(),
1032 $os_type.($os_version eq "*" ? "" :" $os_version"));
1037 $line =~ s/\r|\n//g;
1038 return "<script language=JavaScript type=text/javascript>\n".
1039 "defaultStatus=\""."e_escape($line)."\";\n".
1044 =head2 popup_header([title], [head-stuff], [body-stuff], [no-body])
1046 Outputs a page header, suitable for a popup window. If no title is given,
1047 absolutely no decorations are output. Also useful in framesets. The parameters
1050 =item title - Title text for the popup window.
1052 =item head-stuff - HTML to appear in the <head> section.
1054 =item body-stuff - HTML attributes to be include in the <body> tag.
1056 =item no-body - If set to 1, don't generate a body tag
1061 return if ($main::done_webmin_header++);
1063 my $charset = defined($main::force_charset) ? $main::force_charset
1065 &PrintHeader($charset);
1066 &load_theme_library();
1067 if (defined(&theme_popup_header)) {
1068 &theme_popup_header(@_);
1069 $miniserv::page_capture = 1;
1072 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1075 if (defined(&theme_popup_prehead)) {
1076 &theme_popup_prehead(@_);
1078 print "<title>$_[0]</title>\n";
1080 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1081 if ($tconfig{'headinclude'}) {
1082 print &read_file_contents(
1083 "$theme_root_directory/$tconfig{'headinclude'}");
1086 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1087 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1088 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1089 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1090 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1091 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1092 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1095 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1096 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1097 if (defined(&theme_popup_prebody)) {
1098 &theme_popup_prebody(@_);
1101 $miniserv::page_capture = 1;
1104 =head2 footer([page, name]+, [noendbody])
1106 Outputs the footer for a Webmin HTML page, possibly with links back to other
1107 pages. The links are specified by pairs of parameters, the first of which is
1108 a link destination, and the second the link text. For example :
1110 footer('/', 'Webmin index', '', 'Module menu');
1115 $miniserv::page_capture = 0;
1116 &load_theme_library();
1117 my %this_module_info = &get_module_info(&get_module_name());
1118 if (defined(&theme_footer)) {
1119 $module_name = &get_module_name(); # Old themes use these
1120 %module_info = %this_module_info;
1124 for(my $i=0; $i+1<@_; $i+=2) {
1126 if ($url ne '/' || !$tconfig{'noindex'}) {
1128 $url = "/?cat=$this_module_info{'category'}";
1130 elsif ($url eq '' && &get_module_name()) {
1131 $url = "/".&get_module_name()."/".
1132 $this_module_info{'index_link'};
1134 elsif ($url =~ /^\?/ && &get_module_name()) {
1135 $url = "/".&get_module_name()."/$url";
1137 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1139 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1144 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1149 my $postbody = $tconfig{'postbody'};
1151 my $hostname = &get_display_hostname();
1152 my $version = &get_webmin_version();
1153 my $os_type = $gconfig{'real_os_type'} ||
1154 $gconfig{'os_type'};
1155 my $os_version = $gconfig{'real_os_version'} ||
1156 $gconfig{'os_version'};
1157 $postbody =~ s/%HOSTNAME%/$hostname/g;
1158 $postbody =~ s/%VERSION%/$version/g;
1159 $postbody =~ s/%USER%/$remote_user/g;
1160 $postbody =~ s/%OS%/$os_type $os_version/g;
1161 print "$postbody\n";
1163 if ($tconfig{'postbodyinclude'}) {
1165 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1171 if (defined(&theme_postbody)) {
1172 &theme_postbody(@_);
1174 print "</body></html>\n";
1178 =head2 popup_footer([no-body])
1180 Outputs html for a footer for a popup window, started by popup_header.
1185 $miniserv::page_capture = 0;
1186 &load_theme_library();
1187 if (defined(&theme_popup_footer)) {
1188 &theme_popup_footer(@_);
1197 =head2 load_theme_library
1199 Immediately loads the current theme's theme.pl file. Not generally useful for
1200 most module developers, as this is called automatically by the header function.
1203 sub load_theme_library
1205 return if (!$current_theme || $loaded_theme_library++);
1206 for(my $i=0; $i<@theme_root_directories; $i++) {
1207 if ($theme_configs[$i]->{'functions'}) {
1208 do $theme_root_directories[$i]."/".
1209 $theme_configs[$i]->{'functions'};
1214 =head2 redirect(url)
1216 Output HTTP headers to redirect the browser to some page. The url parameter is
1217 typically a relative URL like index.cgi or list_users.cgi.
1222 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1223 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1224 ":$ENV{'SERVER_PORT'}";
1225 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1226 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1228 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1229 # Absolute URL (like http://...)
1232 elsif ($_[0] =~ /^\//) {
1233 # Absolute path (like /foo/bar.cgi)
1234 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1236 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1237 # Relative URL (like foo.cgi)
1238 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1241 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1243 &load_theme_library();
1244 if (defined(&theme_redirect)) {
1245 $module_name = &get_module_name(); # Old themes use these
1246 %module_info = &get_module_info($module_name);
1247 &theme_redirect($_[0], $url);
1250 print "Location: $url\n\n";
1254 =head2 kill_byname(name, signal)
1256 Finds a process whose command line contains the given name (such as httpd), and
1257 sends some signal to it. The signal can be numeric (like 9) or named
1263 my @pids = &find_byname($_[0]);
1264 return scalar(@pids) if (&is_readonly_mode());
1265 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1266 if ($gconfig{'debug_what_procs'});
1267 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1271 =head2 kill_byname_logged(name, signal)
1273 Like kill_byname, but also logs the killing.
1276 sub kill_byname_logged
1278 my @pids = &find_byname($_[0]);
1279 return scalar(@pids) if (&is_readonly_mode());
1280 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1284 =head2 find_byname(name)
1286 Finds processes searching for the given name in their command lines, and
1287 returns a list of matching PIDs.
1292 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1293 # Linux with /proc filesystem .. use cmdline files, as this is
1294 # faster than forking
1296 opendir(PROCDIR, "/proc");
1297 foreach my $f (readdir(PROCDIR)) {
1298 if ($f eq int($f) && $f != $$) {
1299 my $line = &read_file_contents("/proc/$f/cmdline");
1300 if ($line =~ /$_[0]/) {
1309 if (&foreign_check("proc")) {
1310 # Call the proc module
1311 &foreign_require("proc", "proc-lib.pl");
1312 if (defined(&proc::list_processes)) {
1313 my @procs = &proc::list_processes();
1315 foreach my $p (@procs) {
1316 if ($p->{'args'} =~ /$_[0]/) {
1317 push(@pids, $p->{'pid'});
1320 @pids = grep { $_ != $$ } @pids;
1325 # Fall back to running a command
1327 $cmd = $gconfig{'find_pid_command'};
1328 $cmd =~ s/NAME/"$_[0]"/g;
1329 $cmd = &translate_command($cmd);
1330 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1331 @pids = grep { $_ != $$ } @pids;
1335 =head2 error([message]+)
1337 Display an error message and exit. This should be used by CGI scripts that
1338 encounter a fatal error or invalid user input to notify users of the problem.
1339 If error_setup has been called, the displayed error message will be prefixed
1340 by the message setup using that function.
1345 $main::no_miniserv_userdb = 1;
1346 my $msg = join("", @_);
1347 $msg =~ s/<[^>]*>//g;
1348 if (!$main::error_must_die) {
1349 print STDERR "Error: ",$msg,"\n";
1351 &load_theme_library();
1352 if ($main::error_must_die) {
1353 if ($gconfig{'error_stack'}) {
1354 print STDERR "Error: ",$msg,"\n";
1355 for(my $i=0; my @stack = caller($i); $i++) {
1356 print STDERR "File: $stack[1] Line: $stack[2] ",
1357 "Function: $stack[3]\n";
1362 elsif (!$ENV{'REQUEST_METHOD'}) {
1363 # Show text-only error
1364 print STDERR "$text{'error'}\n";
1365 print STDERR "-----\n";
1366 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1368 print STDERR "-----\n";
1369 if ($gconfig{'error_stack'}) {
1371 print STDERR $text{'error_stack'},"\n";
1372 for(my $i=0; my @stack = caller($i); $i++) {
1373 print STDERR &text('error_stackline',
1374 $stack[1], $stack[2], $stack[3]),"\n";
1379 elsif (defined(&theme_error)) {
1383 &header($text{'error'}, "");
1385 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1387 if ($gconfig{'error_stack'}) {
1389 print "<h3>$text{'error_stack'}</h3>\n";
1391 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1392 "<td><b>$text{'error_line'}</b></td> ",
1393 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1394 for($i=0; my @stack = caller($i); $i++) {
1396 print "<td>$stack[1]</td>\n";
1397 print "<td>$stack[2]</td>\n";
1398 print "<td>$stack[3]</td>\n";
1404 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1405 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1411 &unlock_all_files();
1412 &cleanup_tempnames();
1416 =head2 popup_error([message]+)
1418 This function is almost identical to error, but displays the message with HTML
1419 headers suitable for a popup window.
1424 $main::no_miniserv_userdb = 1;
1425 &load_theme_library();
1426 if ($main::error_must_die) {
1429 elsif (defined(&theme_popup_error)) {
1430 &theme_popup_error(@_);
1433 &popup_header($text{'error'}, "");
1434 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1437 &unlock_all_files();
1438 &cleanup_tempnames();
1442 =head2 error_setup(message)
1444 Registers a message to be prepended to all error messages displayed by the
1450 $main::whatfailed = $_[0];
1453 =head2 wait_for(handle, regexp, regexp, ...)
1455 Reads from the input stream until one of the regexps matches, and returns the
1456 index of the matching regexp, or -1 if input ended before any matched. This is
1457 very useful for parsing the output of interactive programs, and can be used with
1458 a two-way pipe to feed input to a program in response to output matched by
1461 If the matching regexp contains bracketed sub-expressions, their values will
1462 be placed in the global array @matches, indexed starting from 1. You cannot
1463 use the Perl variables $1, $2 and so on to capture matches.
1467 $rv = wait_for($loginfh, "username:");
1469 error("Didn't get username prompt");
1471 print $loginfh "joe\n";
1472 $rv = wait_for($loginfh, "password:");
1474 error("Didn't get password prompt");
1476 print $loginfh "smeg\n";
1481 my ($c, $i, $sw, $rv, $ha);
1482 undef($wait_for_input);
1483 if ($wait_for_debug) {
1484 print STDERR "wait_for(",join(",", @_),")\n";
1486 $ha = &callers_package($_[0]);
1487 if ($wait_for_debug) {
1488 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1493 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1494 " \$wait_for_input .= \$c;\n";
1495 if ($wait_for_debug) {
1496 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1498 for($i=1; $i<@_; $i++) {
1499 $sw = $i>1 ? "elsif" : "if";
1500 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1503 " if (defined(\$hit)) {\n".
1504 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1510 &error("wait_for error : $@\n");
1515 =head2 fast_wait_for(handle, string, string, ...)
1517 This function behaves very similar to wait_for (documented above), but instead
1518 of taking regular expressions as parameters, it takes strings. As soon as the
1519 input contains one of them, it will return the index of the matching string.
1520 If the input ends before any match, it returns -1.
1525 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1526 for($i=1; $i<@_; $i++) {
1527 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1531 if (($c = getc($ha)) eq "") {
1532 &error("fast_wait_for read error : $!");
1535 if (length($inp) > $maxlen) {
1536 $inp = substr($inp, length($inp)-$maxlen);
1538 $inpl = length($inp);
1539 for($i=1; $i<@_; $i++) {
1540 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1547 =head2 has_command(command)
1549 Returns the full path to the executable if some command is in the path, or
1550 undef if not found. If the given command is already an absolute path and
1551 exists, then the same path will be returned.
1556 if (!$_[0]) { return undef; }
1557 if (exists($main::has_command_cache{$_[0]})) {
1558 return $main::has_command_cache{$_[0]};
1561 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1562 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1563 # Absolute path given - just use it
1564 my $t = &translate_filename($_[0]);
1565 $rv = (-x $t && !-d _) ? $_[0] : undef;
1568 # Check each directory in the path
1570 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1571 next if ($donedir{$d}++);
1572 $d =~ s/$slash$// if ($d ne $slash);
1573 my $t = &translate_filename("$d/$_[0]");
1574 if (-x $t && !-d _) {
1575 $rv = $d.$slash.$_[0];
1578 if ($gconfig{'os_type'} eq 'windows') {
1579 foreach my $sfx (".exe", ".com", ".bat") {
1580 my $t = &translate_filename("$d/$_[0]").$sfx;
1581 if (-r $t && !-d _) {
1582 $rv = $d.$slash.$_[0].$sfx;
1589 $main::has_command_cache{$_[0]} = $rv;
1593 =head2 make_date(seconds, [date-only], [fmt])
1595 Converts a Unix date/time in seconds to a human-readable form, by default
1596 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1598 =item seconds - Unix time is seconds to convert.
1600 =item date-only - If set to 1, exclude the time from the returned string.
1602 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1607 my ($secs, $only, $fmt) = @_;
1608 my @tm = localtime($secs);
1611 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1613 if ($fmt eq 'dd/mon/yyyy') {
1614 $date = sprintf "%2.2d/%s/%4.4d",
1615 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1617 elsif ($fmt eq 'dd/mm/yyyy') {
1618 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1620 elsif ($fmt eq 'mm/dd/yyyy') {
1621 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1623 elsif ($fmt eq 'yyyy/mm/dd') {
1624 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1626 elsif ($fmt eq 'd. mon yyyy') {
1627 $date = sprintf "%d. %s %4.4d",
1628 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1630 elsif ($fmt eq 'dd.mm.yyyy') {
1631 $date = sprintf "%2.2d.%2.2d.%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1633 elsif ($fmt eq 'yyyy-mm-dd') {
1634 $date = sprintf "%4.4d-%2.2d-%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1637 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1642 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1644 Return HTML for a button that pops up a file chooser when clicked, and places
1645 the selected filename into another HTML field. The parameters are :
1647 =item input - Name of the form field to store the filename in.
1649 =item type - 0 for file or directory chooser, or 1 for directory only.
1651 =item form - Index of the form containing the button.
1653 =item chroot - If set to 1, the chooser will be limited to this directory.
1655 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1658 sub file_chooser_button
1660 return &theme_file_chooser_button(@_)
1661 if (defined(&theme_file_chooser_button));
1662 my $form = defined($_[2]) ? $_[2] : 0;
1663 my $chroot = defined($_[3]) ? $_[3] : "/";
1664 my $add = int($_[4]);
1665 my ($w, $h) = (400, 300);
1666 if ($gconfig{'db_sizefile'}) {
1667 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1669 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/chooser.cgi?add=$add&type=$_[1]&chroot=$chroot&file=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=no,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
1672 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1674 Returns HTML for a button that will popup a chooser window of some kind. The
1677 =item url - Base URL of the popup window's contents
1679 =item width - Width of the window in pixels
1681 =item height - Height in pixels
1683 =item scrollbars - Set to 1 if the window should have scrollbars
1685 The field-mappings parameter is an array ref of array refs containing
1687 =item - Attribute to assign field to in the popup window
1689 =item - Form field name
1691 =item - CGI parameter to URL for value, if any
1694 sub popup_window_button
1696 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1697 my ($url, $w, $h, $scroll, $fields) = @_;
1698 my $scrollyn = $scroll ? "yes" : "no";
1699 my $rv = "<input type=button onClick='";
1700 foreach my $m (@$fields) {
1701 $rv .= "$m->[0] = form.$m->[1]; ";
1703 my $sep = $url =~ /\?/ ? "&" : "?";
1704 $rv .= "chooser = window.open(\"$url\"";
1705 foreach my $m (@$fields) {
1707 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1711 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1712 foreach my $m (@$fields) {
1713 $rv .= "chooser.$m->[0] = $m->[0]; ";
1714 $rv .= "window.$m->[0] = $m->[0]; ";
1716 $rv .= "' value=\"...\">";
1720 =head2 read_acl(&user-module-hash, &user-list-hash, [&only-users])
1722 Reads the Webmin acl file into the given hash references. The first is indexed
1723 by a combined key of username,module , with the value being set to 1 when
1724 the user has access to that module. The second is indexed by username, with
1725 the value being an array ref of allowed modules.
1727 This function is deprecated in favour of foreign_available, which performs a
1728 more comprehensive check of module availability.
1730 If the only-users array ref parameter is given, the results may be limited to
1731 users in that list of names.
1736 my ($usermod, $userlist, $only) = @_;
1737 if (!%main::acl_hash_cache) {
1738 # Read from local files
1740 open(ACL, &acl_filename());
1742 if (/^([^:]+):\s*(.*)/) {
1744 my @mods = split(/\s+/, $2);
1745 foreach my $m (@mods) {
1746 $main::acl_hash_cache{$user,$m}++;
1748 $main::acl_array_cache{$user} = \@mods;
1753 %$usermod = %main::acl_hash_cache if ($usermod);
1754 %$userlist = %main::acl_array_cache if ($userlist);
1757 my $userdb = &get_userdb_string();
1758 my ($dbh, $proto, $prefix, $args) =
1759 $userdb ? &connect_userdb($userdb) : ( );
1761 if ($proto eq "mysql" || $proto eq "postgresql") {
1762 # Select usernames and modules from SQL DB
1763 my $cmd = $dbh->prepare(
1764 "select webmin_user.name,webmin_user_attr.value ".
1765 "from webmin_user,webmin_user_attr ".
1766 "where webmin_user.id = webmin_user_attr.id ".
1767 "and webmin_user_attr.attr = 'modules' ".
1768 ($only ? " and webmin_user.name in (".
1769 join(",", map { "'$_'" } @$only).")" : ""));
1770 if ($cmd && $cmd->execute()) {
1771 while(my ($user, $mods) = $cmd->fetchrow()) {
1772 my @mods = split(/\s+/, $mods);
1773 foreach my $m (@mods) {
1774 $usermod->{$user,$m}++ if ($usermod);
1776 $userlist->{$user} = \@mods if ($userlist);
1779 $cmd->finish() if ($cmd);
1781 elsif ($proto eq "ldap") {
1782 # Find users in LDAP
1783 my $filter = '(objectClass='.$args->{'userclass'}.')';
1786 "(|".join("", map { "(cn=$_)" } @$only).")";
1787 $filter = "(&".$filter.$ufilter.")";
1789 my $rv = $dbh->search(
1793 attrs => [ 'cn', 'webminModule' ]);
1794 if ($rv && !$rv->code) {
1795 foreach my $u ($rv->all_entries) {
1796 my $user = $u->get_value('cn');
1797 my @mods =$u->get_value('webminModule');
1798 foreach my $m (@mods) {
1799 $usermod->{$user,$m}++ if ($usermod);
1801 $userlist->{$user} = \@mods if ($userlist);
1805 &disconnect_userdb($userdb, $dbh);
1811 Returns the file containing the webmin ACL, which is usually
1812 /etc/webmin/webmin.acl.
1817 return "$config_directory/webmin.acl";
1822 Does nothing, but kept around for compatability.
1829 =head2 get_miniserv_config(&hash)
1831 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1832 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1836 sub get_miniserv_config
1838 return &read_file_cached(
1839 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1842 =head2 put_miniserv_config(&hash)
1844 Writes out the Webmin webserver configuration file from the contents of
1845 the given hash ref. This should be initially populated by get_miniserv_config,
1848 get_miniserv_config(\%miniserv);
1849 $miniserv{'port'} = 10005;
1850 put_miniserv_config(\%miniserv);
1854 sub put_miniserv_config
1856 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1860 =head2 restart_miniserv([nowait])
1862 Kill the old miniserv process and re-start it, then optionally waits for
1863 it to restart. This will apply all configuration settings.
1866 sub restart_miniserv
1869 return undef if (&is_readonly_mode());
1871 &get_miniserv_config(\%miniserv) || return;
1872 if ($main::webmin_script_type eq 'web' && !$ENV{"MINISERV_CONFIG"}) {
1873 # Running under some web server other than miniserv, so do nothing
1878 if ($gconfig{'os_type'} ne 'windows') {
1879 # On Unix systems, we can restart with a signal
1880 my ($pid, $addr, $i);
1881 $miniserv{'inetd'} && return;
1882 my @oldst = stat($miniserv{'pidfile'});
1883 $pid = $ENV{'MINISERV_PID'};
1885 if (!open(PID, $miniserv{'pidfile'})) {
1886 print STDERR "PID file $miniserv{'pidfile'} does ",
1893 print STDERR "Invalid PID file $miniserv{'pidfile'}\n";
1896 if (!kill(0, $pid)) {
1897 print STDERR "PID $pid from file $miniserv{'pidfile'} ",
1903 # Just signal miniserv to restart
1904 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1906 # Wait till new PID is written, indicating a restart
1907 for($i=0; $i<60; $i++) {
1909 my @newst = stat($miniserv{'pidfile'});
1910 last if ($newst[9] != $oldst[9]);
1912 $i < 60 || &error("Webmin server did not write new PID file");
1914 ## Totally kill the process and re-run it
1915 #$SIG{'TERM'} = 'IGNORE';
1916 #&kill_logged('TERM', $pid);
1917 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1920 # On Windows, we need to use the flag file
1921 open(TOUCH, ">$miniserv{'restartflag'}");
1926 # Wait for miniserv to come back up
1927 my $addr = $miniserv{'bind'} || "127.0.0.1";
1929 for($i=0; $i<20; $i++) {
1932 &open_socket($addr, $miniserv{'port'}, STEST, \$err);
1934 last if (!$err && ++$ok >= 2);
1936 $i < 20 || &error("Failed to restart Webmin server!");
1940 =head2 reload_miniserv
1942 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1943 configuration files. Not all changes will be applied though, such as the
1944 IP addresses and ports to accept connections on.
1949 return undef if (&is_readonly_mode());
1951 &get_miniserv_config(\%miniserv) || return;
1952 if ($main::webmin_script_type eq 'web' && !$ENV{"MINISERV_CONFIG"}) {
1953 # Running under some web server other than miniserv, so do nothing
1957 if ($gconfig{'os_type'} ne 'windows') {
1958 # Send a USR1 signal to re-read the config
1959 my ($pid, $addr, $i);
1960 $miniserv{'inetd'} && return;
1961 $pid = $ENV{'MINISERV_PID'};
1963 if (!open(PID, $miniserv{'pidfile'})) {
1964 print STDERR "PID file $miniserv{'pidfile'} does ",
1971 print STDERR "Invalid PID file $miniserv{'pidfile'}\n";
1974 if (!kill(0, $pid)) {
1975 print STDERR "PID $pid from file $miniserv{'pidfile'} ",
1980 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1982 # Make sure this didn't kill Webmin!
1984 if (!kill(0, $pid)) {
1985 print STDERR "USR1 signal killed Webmin - restarting\n";
1986 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1990 # On Windows, we need to use the flag file
1991 open(TOUCH, ">$miniserv{'reloadflag'}");
1996 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1998 Returns 1 if some module is supported on the current operating system, or the
1999 OS supplies as parameters. The parameters are :
2001 =item minfo - A hash ref of module information, as returned by get_module_info
2003 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
2005 =item os-version - The Webmin OS version to use, such as 13.0
2007 =item api-only - If set to 1, considers a module supported if it provides an API to other modules on this OS, even if the majority of its functionality is not supported.
2010 sub check_os_support
2012 my $oss = $_[0]->{'os_support'};
2013 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
2014 # May provide usable API
2015 $oss .= " ".$_[0]->{'api_os_support'};
2017 if ($_[0]->{'nozone'} && &running_in_zone()) {
2018 # Not supported in a Solaris Zone
2021 if ($_[0]->{'novserver'} && &running_in_vserver()) {
2022 # Not supported in a Linux Vserver
2025 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
2026 # Not supported in an OpenVZ container
2029 return 1 if (!$oss || $oss eq '*');
2030 my $osver = $_[2] || $gconfig{'os_version'};
2031 my $ostype = $_[1] || $gconfig{'os_type'};
2034 my ($os, $ver, $codes);
2035 my ($neg) = ($oss =~ s/^!//); # starts with !
2036 $anyneg++ if ($neg);
2037 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2039 $os = $1; $ver = $2; $codes = $3; $oss = $4;
2041 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
2043 $os = $1; $ver = $2; $oss = $3;
2045 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2047 $os = $1; $codes = $2; $oss = $3;
2049 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
2051 $codes = $1; $oss = $2;
2053 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
2055 $os = $1; $oss = $2;
2058 next if ($os && !($os eq $ostype ||
2059 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
2060 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
2061 next if ($osver < $1 || $osver > $2);
2063 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
2064 next if ($osver < $1);
2066 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
2067 next if ($osver > $1);
2070 next if ($ver ne $osver);
2072 next if ($codes && !eval $codes);
2078 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2080 Downloads data from a HTTP url to a local file or string. The parameters are :
2082 =item host - The hostname part of the URL, such as www.google.com
2084 =item port - The HTTP port number, such as 80
2086 =item page - The filename part of the URL, like /index.html
2088 =item destfile - The local file to save the URL data to, like /tmp/index.html. This can also be a scalar reference, in which case the data will be appended to that scalar.
2090 =item error - If set to a scalar ref, the function will store any error message in this scalar and return 0 on failure, or 1 on success. If not set, it will simply call the error function if the download fails.
2092 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2094 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2096 =item user - If set, HTTP authentication is done with this username.
2098 =item pass - The HTTP password to use with the username above.
2100 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2102 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2104 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2106 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2111 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2112 $timeout, $osdn, $nocache, $headers) = @_;
2113 if ($gconfig{'debug_what_net'}) {
2114 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2115 ($user ? " user=$user pass=$pass" : "").
2116 (ref($dest) ? "" : " dest=$dest"));
2119 # Convert OSDN URL first
2120 my $prot = $ssl ? "https://" : "http://";
2121 my $portstr = $ssl && $port == 443 ||
2122 !$ssl && $port == 80 ? "" : ":$port";
2123 ($host, $port, $page, $ssl) = &parse_http_url(
2124 &convert_osdn_url($prot.$host.$portstr.$page));
2127 # Check if we already have cached the URL
2128 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2129 my $cfile = &check_in_http_cache($url);
2130 if ($cfile && !$nocache) {
2131 # Yes! Copy to dest file or variable
2132 &$cbfunc(6, $url) if ($cbfunc);
2134 &open_readfile(CACHEFILE, $cfile);
2136 $$dest = <CACHEFILE>;
2140 ©_source_dest($cfile, $dest);
2147 push(@headers, [ "Host", $host ]);
2148 push(@headers, [ "User-agent", "Webmin" ]);
2149 push(@headers, [ "Accept-language", "en" ]);
2151 my $auth = &encode_base64("$user:$pass");
2152 $auth =~ tr/\r\n//d;
2153 push(@headers, [ "Authorization", "Basic $auth" ]);
2155 foreach my $hname (keys %$headers) {
2156 push(@headers, [ $hname, $headers->{$hname} ]);
2159 # Actually download it
2160 $main::download_timed_out = undef;
2161 local $SIG{ALRM} = \&download_timeout;
2162 alarm($timeout || 60);
2163 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2165 $h = $main::download_timed_out if ($main::download_timed_out);
2167 if ($error) { $$error = $h; return; }
2168 else { &error($h); }
2170 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2171 $headers, $ssl, $nocache);
2172 if ((!$error || !$$error) && !$nocache) {
2173 &write_to_http_cache($url, $dest);
2177 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2179 Do a HTTP download, after the headers have been sent. For internal use only,
2180 typically called by http_download.
2183 sub complete_http_download
2185 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2191 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2192 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2194 if ($_[2]) { ${$_[2]} = $line; return; }
2195 else { &error("Download failed : $line"); }
2198 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2201 $line = &read_http_connection($_[0]);
2202 $line =~ tr/\r\n//d;
2203 $line =~ /^(\S+):\s+(.*)$/ || last;
2204 $header{lc($1)} = $2;
2205 push(@headers, [ lc($1), $2 ]);
2208 if ($main::download_timed_out) {
2209 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2210 else { &error($main::download_timed_out); }
2212 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2213 if ($rcode >= 300 && $rcode < 400) {
2214 # follow the redirect
2215 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2216 my ($host, $port, $page, $ssl);
2217 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2218 $ssl = $1 eq 'https' ? 1 : 0;
2219 $host = $2; $port = $3; $page = $4 || "/";
2221 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2222 $ssl = $1 eq 'https' ? 1 : 0;
2223 $host = $2; $port = 80; $page = $3 || "/";
2225 elsif ($header{'location'} =~ /^\// && $_[5]) {
2226 # Relative to same server
2230 $page = $header{'location'};
2232 elsif ($header{'location'}) {
2233 # Assume relative to same dir .. not handled
2234 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2235 else { &error("Invalid Location header $header{'location'}"); }
2238 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2239 else { &error("Missing Location header"); }
2242 ($page, $params) = split(/\?/, $page);
2244 $page .= "?".$params if (defined($params));
2245 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2246 undef, undef, undef, $_[4], $_[9], $_[7]);
2251 # Append to a variable
2252 while(defined($buf = &read_http_connection($_[0], 1024))) {
2254 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2260 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2261 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2262 else { &error("Failed to write to $_[1] : $!"); }
2264 binmode(PFILE); # For windows
2265 while(defined($buf = &read_http_connection($_[0], 1024))) {
2266 &print_tempfile(PFILE, $buf);
2267 $got += length($buf);
2268 &$cbfunc(3, $got) if ($cbfunc);
2270 &close_tempfile(PFILE);
2271 if ($header{'content-length'} &&
2272 $got != $header{'content-length'}) {
2273 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2274 else { &error("Download incomplete"); }
2277 &$cbfunc(4) if ($cbfunc);
2279 &close_http_connection($_[0]);
2283 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2285 Download data from an FTP site to a local file. The parameters are :
2287 =item host - FTP server hostname
2289 =item file - File on the FTP server to download
2291 =item destfile - File on the Webmin system to download data to
2293 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2295 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2297 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2299 =item pass - Password for the username above.
2301 =item port - FTP server port number, which defaults to 21 if not set.
2306 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2308 if ($gconfig{'debug_what_net'}) {
2309 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2310 ($user ? " user=$user pass=$pass" : "").
2311 (ref($dest) ? "" : " dest=$dest"));
2315 if (&is_readonly_mode()) {
2316 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2318 else { &error("FTP connections not allowed in readonly mode"); }
2321 # Check if we already have cached the URL
2322 my $url = "ftp://".$host.$file;
2323 my $cfile = &check_in_http_cache($url);
2325 # Yes! Copy to dest file or variable
2326 &$cbfunc(6, $url) if ($cbfunc);
2328 &open_readfile(CACHEFILE, $cfile);
2330 $$dest = <CACHEFILE>;
2334 ©_source_dest($cfile, $dest);
2339 # Actually download it
2340 $main::download_timed_out = undef;
2341 local $SIG{ALRM} = \&download_timeout;
2344 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2345 # download through http-style proxy
2347 if (&open_socket($1, $2, "SOCK", \$error)) {
2349 if ($main::download_timed_out) {
2351 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2352 else { &error($main::download_timed_out); }
2354 my $esc = $_[1]; $esc =~ s/ /%20/g;
2355 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2356 my $portstr = $port == 21 ? "" : ":$port";
2357 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2358 print SOCK "User-agent: Webmin\r\n";
2359 if ($gconfig{'proxy_user'}) {
2360 my $auth = &encode_base64(
2361 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2362 $auth =~ tr/\r\n//d;
2363 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2366 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2369 elsif (!$gconfig{'proxy_fallback'}) {
2371 if ($error) { $$error = $main::download_timed_out; return 0; }
2372 else { &error($main::download_timed_out); }
2377 # connect to host and login with real FTP protocol
2378 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2380 if ($main::download_timed_out) {
2381 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2382 else { &error($main::download_timed_out); }
2384 &ftp_command("", 2, $_[3]) || return 0;
2386 # Login as supplied user
2387 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2389 if (int($urv[1]/100) == 3) {
2390 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2394 # Login as anonymous
2395 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2397 if (int($urv[1]/100) == 3) {
2398 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2402 &$cbfunc(1, 0) if ($cbfunc);
2405 # get the file size and tell the callback
2406 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2407 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2408 defined($size) || return 0;
2410 &$cbfunc(2, int($size));
2414 my $pasv = &ftp_command("PASV", 2, $_[3]);
2415 defined($pasv) || return 0;
2416 $pasv =~ /\(([0-9,]+)\)/;
2417 @n = split(/,/ , $1);
2418 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2419 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2420 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2424 &open_tempfile(PFILE, ">$_[2]", 1);
2425 while(read(CON, $buf, 1024) > 0) {
2426 &print_tempfile(PFILE, $buf);
2427 $got += length($buf);
2428 &$cbfunc(3, $got) if ($cbfunc);
2430 &close_tempfile(PFILE);
2432 if ($got != $size) {
2433 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2434 else { &error("Download incomplete"); }
2436 &$cbfunc(4) if ($cbfunc);
2438 &ftp_command("", 2, $_[3]) || return 0;
2442 &ftp_command("QUIT", 2, $_[3]) || return 0;
2446 &write_to_http_cache($url, $dest);
2450 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2452 Upload data from a local file to an FTP site. The parameters are :
2454 =item host - FTP server hostname
2456 =item file - File on the FTP server to write to
2458 =item srcfile - File on the Webmin system to upload data from
2460 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2462 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2464 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2466 =item pass - Password for the username above.
2468 =item port - FTP server port number, which defaults to 21 if not set.
2475 if (&is_readonly_mode()) {
2476 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2478 else { &error("FTP connections not allowed in readonly mode"); }
2481 $main::download_timed_out = undef;
2482 local $SIG{ALRM} = \&download_timeout;
2485 # connect to host and login
2486 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2488 if ($main::download_timed_out) {
2489 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2490 else { &error($main::download_timed_out); }
2492 &ftp_command("", 2, $_[3]) || return 0;
2494 # Login as supplied user
2495 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2497 if (int($urv[1]/100) == 3) {
2498 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2502 # Login as anonymous
2503 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2505 if (int($urv[1]/100) == 3) {
2506 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2510 &$cbfunc(1, 0) if ($cbfunc);
2512 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2514 # get the file size and tell the callback
2515 my @st = stat($_[2]);
2517 &$cbfunc(2, $st[7]);
2521 my $pasv = &ftp_command("PASV", 2, $_[3]);
2522 defined($pasv) || return 0;
2523 $pasv =~ /\(([0-9,]+)\)/;
2524 @n = split(/,/ , $1);
2525 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2526 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2531 while(read(PFILE, $buf, 1024) > 0) {
2533 $got += length($buf);
2534 &$cbfunc(3, $got) if ($cbfunc);
2538 if ($got != $st[7]) {
2539 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2540 else { &error("Upload incomplete"); }
2542 &$cbfunc(4) if ($cbfunc);
2545 &ftp_command("", 2, $_[3]) || return 0;
2546 &ftp_command("QUIT", 2, $_[3]) || return 0;
2552 =head2 no_proxy(host)
2554 Checks if some host is on the no proxy list. For internal use by the
2555 http_download and ftp_download functions.
2560 my $ip = &to_ipaddress($_[0]);
2561 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2562 return 1 if ($_[0] =~ /\Q$n\E/ ||
2568 =head2 open_socket(host, port, handle, [&error])
2570 Open a TCP connection to some host and port, using a file handle. The
2573 =item host - Hostname or IP address to connect to.
2575 =item port - TCP port number.
2577 =item handle - A file handle name to use for the connection.
2579 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2584 my ($host, $port, $fh, $err) = @_;
2585 $fh = &callers_package($fh);
2587 if ($gconfig{'debug_what_net'}) {
2588 &webmin_debug_log('TCP', "host=$host port=$port");
2591 # Lookup IP address for the host. Try v4 first, and failing that v6
2593 my $proto = getprotobyname("tcp");
2594 if ($ip = &to_ipaddress($host)) {
2595 # Create IPv4 socket and connection
2596 if (!socket($fh, PF_INET(), SOCK_STREAM, $proto)) {
2597 my $msg = "Failed to create socket : $!";
2598 if ($err) { $$err = $msg; return 0; }
2599 else { &error($msg); }
2601 my $addr = inet_aton($ip);
2602 if ($gconfig{'bind_proxy'}) {
2603 # BIND to outgoing IP
2604 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2605 my $msg = "Failed to bind to source address : $!";
2606 if ($err) { $$err = $msg; return 0; }
2607 else { &error($msg); }
2610 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2611 my $msg = "Failed to connect to $host:$port : $!";
2612 if ($err) { $$err = $msg; return 0; }
2613 else { &error($msg); }
2616 elsif ($ip = &to_ip6address($host)) {
2617 # Create IPv6 socket and connection
2618 if (!&supports_ipv6()) {
2619 $msg = "IPv6 connections are not supported";
2620 if ($err) { $$err = $msg; return 0; }
2621 else { &error($msg); }
2623 if (!socket($fh, Socket6::PF_INET6(), SOCK_STREAM, $proto)) {
2624 my $msg = "Failed to create IPv6 socket : $!";
2625 if ($err) { $$err = $msg; return 0; }
2626 else { &error($msg); }
2628 my $addr = inet_pton(Socket6::AF_INET6(), $ip);
2629 if (!connect($fh, pack_sockaddr_in6($port, $addr))) {
2630 my $msg = "Failed to IPv6 connect to $host:$port : $!";
2631 if ($err) { $$err = $msg; return 0; }
2632 else { &error($msg); }
2637 my $msg = "Failed to lookup IP address for $host";
2638 if ($err) { $$err = $msg; return 0; }
2639 else { &error($msg); }
2643 my $old = select($fh);
2649 =head2 download_timeout
2651 Called when a download times out. For internal use only.
2654 sub download_timeout
2656 $main::download_timed_out = "Download timed out";
2659 =head2 ftp_command(command, expected, [&error], [filehandle])
2661 Send an FTP command, and die if the reply is not what was expected. Mainly
2662 for internal use by the ftp_download and ftp_upload functions.
2667 my ($cmd, $expect, $err, $fh) = @_;
2669 $fh = &callers_package($fh);
2672 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2674 print $fh "$cmd\r\n";
2677 if (!($line = <$fh>)) {
2679 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2680 else { &error("Failed to read reply to $what"); }
2682 $line =~ /^(...)(.)(.*)$/;
2685 foreach my $c (@$expect) {
2686 $found++ if (int($1/100) == $c);
2690 $found++ if (int($1/100) == $_[1]);
2694 if ($err) { $$err = "$what failed : $3"; return undef; }
2695 else { &error("$what failed : $3"); }
2700 # Need to skip extra stuff..
2702 if (!($line = <$fh>)) {
2704 if ($$err) { $$err = "Failed to read reply to $what";
2706 else { &error("Failed to read reply to $what"); }
2708 $line =~ /^(....)(.*)$/; $reply .= $2;
2709 if ($1 eq "$rcode ") { last; }
2713 return wantarray ? ($reply, $rcode) : $reply;
2716 =head2 to_ipaddress(hostname)
2718 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2719 it cannot be resolved.
2724 if (&check_ipaddress($_[0])) {
2725 return $_[0]; # Already in v4 format
2727 elsif (&check_ip6address($_[0])) {
2728 return undef; # A v6 address cannot be converted to v4
2731 my $hn = gethostbyname($_[0]);
2732 return undef if (!$hn);
2733 local @ip = unpack("CCCC", $hn);
2734 return join("." , @ip);
2738 =head2 to_ip6address(hostname)
2740 Converts a hostname to IPv6 address, or returns undef if it cannot be resolved.
2745 if (&check_ip6address($_[0])) {
2746 return $_[0]; # Already in v6 format
2748 elsif (&check_ipaddress($_[0])) {
2749 return undef; # A v4 address cannot be v6
2751 elsif (!&supports_ipv6()) {
2752 return undef; # Cannot lookup
2755 # Perform IPv6 DNS lookup
2757 (undef, undef, undef, $inaddr) =
2758 getaddrinfo($_[0], undef, Socket6::AF_INET6(), SOCK_STREAM);
2759 return undef if (!$inaddr);
2761 (undef, $addr) = unpack_sockaddr_in6($inaddr);
2762 return inet_ntop(Socket6::AF_INET6(), $addr);
2766 =head2 to_hostname(ipv4|ipv6-address)
2768 Reverse-resolves an IPv4 or 6 address to a hostname
2774 if (&check_ip6address($addr) && &supports_ipv6()) {
2775 return gethostbyaddr(inet_pton(Socket6::AF_INET6(), $addr),
2776 Socket6::AF_INET6());
2779 return gethostbyaddr(inet_aton($addr), AF_INET);
2783 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2785 Renders a 4-column table of icons. The useful parameters are :
2787 =item links - An array ref of link destination URLs for the icons.
2789 =item titles - An array ref of titles to appear under the icons.
2791 =item icons - An array ref of URLs for icon images.
2793 =item columns - Number of columns to layout the icons with. Defaults to 4.
2798 &load_theme_library();
2799 if (defined(&theme_icons_table)) {
2800 &theme_icons_table(@_);
2804 my $cols = $_[3] ? $_[3] : 4;
2805 my $per = int(100.0 / $cols);
2806 print "<table class='icons_table' width=100% cellpadding=5>\n";
2807 for(my $i=0; $i<@{$_[0]}; $i++) {
2808 if ($i%$cols == 0) { print "<tr>\n"; }
2809 print "<td width=$per% align=center valign=top>\n";
2810 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2811 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2812 $_[7]->[$i], $_[8]->[$i]);
2814 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2816 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2817 print "</tr>\n" if ($need_tr);
2821 =head2 replace_file_line(file, line, [newline]*)
2823 Replaces one line in some file with 0 or more new lines. The parameters are :
2825 =item file - Full path to some file, like /etc/hosts.
2827 =item line - Line number to replace, starting from 0.
2829 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2832 sub replace_file_line
2835 my $realfile = &translate_filename($_[0]);
2836 open(FILE, $realfile);
2839 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2840 else { splice(@lines, $_[1], 1); }
2841 &open_tempfile(FILE, ">$realfile");
2842 &print_tempfile(FILE, @lines);
2843 &close_tempfile(FILE);
2846 =head2 read_file_lines(file, [readonly])
2848 Returns a reference to an array containing the lines from some file. This
2849 array can be modified, and will be written out when flush_file_lines()
2850 is called. The parameters are :
2852 =item file - Full path to the file to read.
2854 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2858 $lref = read_file_lines("/etc/hosts");
2859 push(@$lref, "127.0.0.1 localhost");
2860 flush_file_lines("/etc/hosts");
2866 my ($package, $filename, $line) = caller;
2867 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2869 my $realfile = &translate_filename($_[0]);
2870 if (!$main::file_cache{$realfile}) {
2873 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2874 open(READFILE, $realfile);
2877 $eol = /\r\n$/ ? "\r\n" : "\n";
2883 $main::file_cache{$realfile} = \@lines;
2884 $main::file_cache_noflush{$realfile} = $_[1];
2885 $main::file_cache_eol{$realfile} = $eol || "\n";
2888 # Make read-write if currently readonly
2890 $main::file_cache_noflush{$realfile} = 0;
2893 return $main::file_cache{$realfile};
2896 =head2 flush_file_lines([file], [eol])
2898 Write out to a file previously read by read_file_lines to disk (except
2899 for those marked readonly). The parameters are :
2901 =item file - The file to flush out.
2903 =item eof - End-of-line character for each line. Defaults to \n.
2906 sub flush_file_lines
2910 local $trans = &translate_filename($_[0]);
2911 $main::file_cache{$trans} ||
2912 &error("flush_file_lines called on non-loaded file $trans");
2913 push(@files, $trans);
2916 @files = ( keys %main::file_cache );
2918 foreach my $f (@files) {
2919 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2920 if (!$main::file_cache_noflush{$f}) {
2921 no warnings; # XXX Bareword file handles should go away
2922 &open_tempfile(FLUSHFILE, ">$f");
2923 foreach my $line (@{$main::file_cache{$f}}) {
2924 (print FLUSHFILE $line,$eol) ||
2925 &error(&text("efilewrite", $f, $!));
2927 &close_tempfile(FLUSHFILE);
2929 delete($main::file_cache{$f});
2930 delete($main::file_cache_noflush{$f});
2934 =head2 unflush_file_lines(file)
2936 Clear the internal cache of some given file, previously read by read_file_lines.
2939 sub unflush_file_lines
2941 my $realfile = &translate_filename($_[0]);
2942 delete($main::file_cache{$realfile});
2943 delete($main::file_cache_noflush{$realfile});
2946 =head2 unix_user_input(fieldname, user, [form])
2948 Returns HTML for an input to select a Unix user. By default this is a text
2949 box with a user popup button next to it.
2954 if (defined(&theme_unix_user_input)) {
2955 return &theme_unix_user_input(@_);
2957 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2958 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2961 =head2 unix_group_input(fieldname, user, [form])
2963 Returns HTML for an input to select a Unix group. By default this is a text
2964 box with a group popup button next to it.
2967 sub unix_group_input
2969 if (defined(&theme_unix_group_input)) {
2970 return &theme_unix_group_input(@_);
2972 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2973 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2976 =head2 hlink(text, page, [module], [width], [height])
2978 Returns HTML for a link that when clicked on pops up a window for a Webmin
2979 help page. The parameters are :
2981 =item text - Text for the link.
2983 =item page - Help page code, such as 'intro'.
2985 =item module - Module the help page is in. Defaults to the current module.
2987 =item width - Width of the help popup window. Defaults to 600 pixels.
2989 =item height - Height of the help popup window. Defaults to 400 pixels.
2991 The actual help pages are in each module's help sub-directory, in files with
2997 if (defined(&theme_hlink)) {
2998 return &theme_hlink(@_);
3000 my $mod = $_[2] ? $_[2] : &get_module_name();
3001 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
3002 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
3003 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>";
3006 =head2 user_chooser_button(field, multiple, [form])
3008 Returns HTML for a javascript button for choosing a Unix user or users.
3009 The parameters are :
3011 =item field - Name of the HTML field to place the username into.
3013 =item multiple - Set to 1 if multiple users can be selected.
3015 =item form - Index of the form on the page.
3018 sub user_chooser_button
3020 return undef if (!&supports_users());
3021 return &theme_user_chooser_button(@_)
3022 if (defined(&theme_user_chooser_button));
3023 my $form = defined($_[2]) ? $_[2] : 0;
3024 my $w = $_[1] ? 500 : 300;
3026 if ($_[1] && $gconfig{'db_sizeusers'}) {
3027 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3029 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3030 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3032 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";
3035 =head2 group_chooser_button(field, multiple, [form])
3037 Returns HTML for a javascript button for choosing a Unix group or groups
3038 The parameters are :
3040 =item field - Name of the HTML field to place the group name into.
3042 =item multiple - Set to 1 if multiple groups can be selected.
3044 =item form - Index of the form on the page.
3047 sub group_chooser_button
3049 return undef if (!&supports_users());
3050 return &theme_group_chooser_button(@_)
3051 if (defined(&theme_group_chooser_button));
3052 my $form = defined($_[2]) ? $_[2] : 0;
3053 my $w = $_[1] ? 500 : 300;
3055 if ($_[1] && $gconfig{'db_sizeusers'}) {
3056 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3058 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3059 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3061 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";
3064 =head2 foreign_check(module, [api-only])
3066 Checks if some other module exists and is supported on this OS. The parameters
3069 =item module - Name of the module to check.
3071 =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.
3076 my ($mod, $api) = @_;
3078 my $mdir = &module_root_directory($mod);
3079 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
3080 return &check_os_support(\%minfo, undef, undef, $api);
3083 =head2 foreign_exists(module)
3085 Checks if some other module exists. The module parameter is the short module
3091 my $mdir = &module_root_directory($_[0]);
3092 return -r "$mdir/module.info";
3095 =head2 foreign_available(module)
3097 Returns 1 if some module is installed, and acessible to the current user. The
3098 module parameter is the module directory name.
3101 sub foreign_available
3103 return 0 if (!&foreign_check($_[0]) &&
3104 !$gconfig{'available_even_if_no_support'});
3105 my %foreign_module_info = &get_module_info($_[0]);
3107 # Check list of allowed modules
3109 &read_acl(\%acl, undef, [ $base_remote_user ]);
3110 return 0 if (!$acl{$base_remote_user,$_[0]} &&
3111 !$acl{$base_remote_user,'*'});
3113 # Check for usermod restrictions
3114 my @usermods = &list_usermods();
3115 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
3117 if (&get_product_name() eq "webmin") {
3118 # Check if the user has any RBAC privileges in this module
3119 if (&supports_rbac($_[0]) &&
3120 &use_rbac_module_acl(undef, $_[0])) {
3121 # RBAC is enabled for this user and module - check if he
3123 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
3124 return 0 if (!$rbacs);
3126 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
3127 # If denying access to modules not specifically allowed by
3128 # RBAC, then prevent access
3133 # Check readonly support
3134 if (&is_readonly_mode()) {
3135 return 0 if (!$foreign_module_info{'readonly'});
3138 # Check if theme vetos
3139 if (defined(&theme_foreign_available)) {
3140 return 0 if (!&theme_foreign_available($_[0]));
3143 # Check if licence module vetos
3144 if ($main::licence_module) {
3145 return 0 if (!&foreign_call($main::licence_module,
3146 "check_module_licence", $_[0]));
3152 =head2 foreign_require(module, [file], [package])
3154 Brings in functions from another module, and places them in the Perl namespace
3155 with the same name as the module. The parameters are :
3157 =item module - The source module's directory name, like sendmail.
3159 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
3161 =item package - Perl package to place the module's functions and global variables in.
3163 If the original module name contains dashes, they will be replaced with _ in
3169 my ($mod, $file, $pkg) = @_;
3170 $pkg ||= $mod || "global";
3171 $pkg =~ s/[^A-Za-z0-9]/_/g;
3174 push(@files, $file);
3178 my %minfo = &get_module_info($mod);
3179 if ($minfo{'library'}) {
3180 @files = split(/\s+/, $minfo{'library'});
3183 @files = ( $mod."-lib.pl" );
3186 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3187 return 1 if (!@files);
3188 foreach my $f (@files) {
3189 $main::done_foreign_require{$pkg,$f}++;
3192 my $mdir = &module_root_directory($mod);
3193 @INC = &unique($mdir, @INC);
3194 -d $mdir || &error("Module $mod does not exist");
3195 if (!&get_module_name() && $mod) {
3198 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3199 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3200 my $code = "package $pkg; ".
3201 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3202 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3203 foreach my $f (@files) {
3204 $code .= "do '$mdir/$f' || die \$@; ";
3207 if (defined($old_fmn)) {
3208 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3211 delete($ENV{'FOREIGN_MODULE_NAME'});
3213 if (defined($old_frd)) {
3214 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3217 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3220 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3224 =head2 foreign_call(module, function, [arg]*)
3226 Call a function in another module. The module parameter is the target module
3227 directory name, function is the perl sub to call, and the remaining parameters
3228 are the arguments. However, unless you need to call a function whose name
3229 is dynamic, it is better to use Perl's cross-module function call syntax
3230 like module::function(args).
3235 my $pkg = $_[0] || "global";
3236 $pkg =~ s/[^A-Za-z0-9]/_/g;
3237 my @args = @_[2 .. @_-1];
3238 $main::foreign_args = \@args;
3239 my @rv = eval <<EOF;
3241 &$_[1](\@{\$main::foreign_args});
3243 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3244 return wantarray ? @rv : $rv[0];
3247 =head2 foreign_config(module, [user-config])
3249 Get the configuration from another module, and return it as a hash. If the
3250 user-config parameter is set to 1, returns the Usermin user-level preferences
3251 for the current user instead.
3256 my ($mod, $uc) = @_;
3259 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3260 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3261 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3264 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3269 =head2 foreign_installed(module, mode)
3271 Checks if the server for some module is installed, and possibly also checks
3272 if the module has been configured by Webmin.
3273 For mode 1, returns 2 if the server is installed and configured for use by
3274 Webmin, 1 if installed but not configured, or 0 otherwise.
3275 For mode 0, returns 1 if installed, 0 if not.
3276 If the module does not provide an install_check.pl script, assumes that
3277 the server is installed.
3280 sub foreign_installed
3282 my ($mod, $configured) = @_;
3283 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3285 return $main::foreign_installed_cache{$mod,$configured};
3289 if (!&foreign_check($mod)) {
3294 my $mdir = &module_root_directory($mod);
3295 if (!-r "$mdir/install_check.pl") {
3296 # Not known, assume OK
3297 $rv = $configured ? 2 : 1;
3300 # Call function to check
3301 &foreign_require($mod, "install_check.pl");
3302 $rv = &foreign_call($mod, "is_installed", $configured);
3305 $main::foreign_installed_cache{$mod,$configured} = $rv;
3310 =head2 foreign_defined(module, function)
3312 Returns 1 if some function is defined in another module. In general, it is
3313 simpler to use the syntax &defined(module::function) instead.
3319 $pkg =~ s/[^A-Za-z0-9]/_/g;
3320 my $func = "${pkg}::$_[1]";
3321 return defined(&$func);
3324 =head2 get_system_hostname([short], [skip-file])
3326 Returns the hostname of this system. If the short parameter is set to 1,
3327 then the domain name is not prepended - otherwise, Webmin will attempt to get
3328 the fully qualified hostname, like foo.example.com.
3331 sub get_system_hostname
3334 my $skipfile = $_[1];
3335 if (!$main::get_system_hostname[$m]) {
3336 if ($gconfig{'os_type'} ne 'windows') {
3337 # Try some common Linux hostname files first
3340 # Never get from file
3342 elsif ($gconfig{'os_type'} eq 'redhat-linux') {
3344 &read_env_file("/etc/sysconfig/network", \%nc);
3345 if ($nc{'HOSTNAME'}) {
3346 $fromfile = $nc{'HOSTNAME'};
3349 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3350 my $hn = &read_file_contents("/etc/hostname");
3356 elsif ($gconfig{'os_type'} eq 'open-linux') {
3357 my $hn = &read_file_contents("/etc/HOSTNAME");
3363 elsif ($gconfig{'os_type'} eq 'solaris') {
3364 my $hn = &read_file_contents("/etc/nodename");
3371 # If we found a hostname in a file, use it
3372 if ($fromfile && ($m || $fromfile =~ /\./)) {
3374 $fromfile =~ s/\..*$//;
3376 $main::get_system_hostname[$m] = $fromfile;
3380 # Can use hostname command on Unix
3381 &execute_command("hostname", undef,
3382 \$main::get_system_hostname[$m], undef, 0, 1);
3383 chop($main::get_system_hostname[$m]);
3385 eval "use Sys::Hostname";
3387 $main::get_system_hostname[$m] = eval "hostname()";
3389 if ($@ || !$main::get_system_hostname[$m]) {
3390 $main::get_system_hostname[$m] = "UNKNOWN";
3393 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3394 $gconfig{'os_type'} =~ /linux$/ &&
3395 !$gconfig{'no_hostname_f'} && !$_[0]) {
3396 # Try with -f flag to get fully qualified name
3398 my $ex = &execute_command("hostname -f", undef, \$flag,
3401 if ($ex || $flag eq "") {
3402 # -f not supported! We have probably set the
3403 # hostname to just '-f'. Fix the problem
3406 &execute_command("hostname ".
3407 quotemeta($main::get_system_hostname[$m]),
3408 undef, undef, undef, 0, 1);
3412 $main::get_system_hostname[$m] = $flag;
3417 # On Windows, try computername environment variable
3418 return $ENV{'computername'} if ($ENV{'computername'});
3419 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3421 # Fall back to net name command
3422 my $out = `net name 2>&1`;
3423 if ($out =~ /\-+\r?\n(\S+)/) {
3424 $main::get_system_hostname[$m] = $1;
3427 $main::get_system_hostname[$m] = "windows";
3431 return $main::get_system_hostname[$m];
3434 =head2 get_webmin_version
3436 Returns the version of Webmin currently being run, such as 1.450.
3439 sub get_webmin_version
3441 if (!$get_webmin_version) {
3442 open(VERSION, "$root_directory/version") || return 0;
3443 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3446 return $get_webmin_version;
3449 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3451 Returns a hash containing access control options for the given user and module.
3452 By default the current username and module name are used. If the no-rbac flag
3453 is given, the permissions will not be updated based on the user's RBAC role
3454 (as seen on Solaris). If the no-default flag is given, default permissions for
3455 the module will not be included.
3460 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3461 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3462 my $mdir = &module_root_directory($m);
3465 # Read default ACL first, to be overridden by per-user settings
3466 &read_file_cached("$mdir/defaultacl", \%rv);
3468 # If this isn't a master admin user, apply the negative permissions
3469 # so that he doesn't un-expectedly gain access to new features
3471 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3472 if ($gaccess{'negative'}) {
3473 &read_file_cached("$mdir/negativeacl", \%rv);
3477 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3478 # RBAC overrides exist for this user in this module
3479 my $rbac = &get_rbac_module_acl(
3480 defined($_[0]) ? $_[0] : $remote_user, $m);
3481 foreach my $r (keys %$rbac) {
3482 $rv{$r} = $rbac->{$r};
3485 elsif ($gconfig{"risk_$u"} && $m) {
3486 # ACL is defined by user's risk level
3487 my $rf = $gconfig{"risk_$u"}.'.risk';
3488 &read_file_cached("$mdir/$rf", \%rv);
3490 my $sf = $gconfig{"skill_$u"}.'.skill';
3491 &read_file_cached("$mdir/$sf", \%rv);
3494 # Use normal Webmin ACL, if a user is set
3495 my $userdb = &get_userdb_string();
3497 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3498 # Look for this user in the user/group DB, if one is defined
3499 # and if the user might be in the DB
3500 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3501 ref($dbh) || &error(&text('euserdbacl', $dbh));
3502 if ($proto eq "mysql" || $proto eq "postgresql") {
3503 # Find the user in the SQL DB
3504 my $cmd = $dbh->prepare(
3505 "select id from webmin_user where name = ?");
3506 $cmd && $cmd->execute($u) ||
3507 &error(&text('euserdbacl', $dbh->errstr));
3508 my ($id) = $cmd->fetchrow();
3509 $foundindb = 1 if (defined($id));
3512 # Fetch ACLs with SQL
3514 my $cmd = $dbh->prepare(
3515 "select attr,value from webmin_user_acl ".
3516 "where id = ? and module = ?");
3517 $cmd && $cmd->execute($id, $m) ||
3518 &error(&text('euserdbacl', $dbh->errstr));
3519 while(my ($a, $v) = $cmd->fetchrow()) {
3525 elsif ($proto eq "ldap") {
3527 my $rv = $dbh->search(
3529 filter => '(&(cn='.$u.')(objectClass='.
3530 $args->{'userclass'}.'))',
3532 if (!$rv || $rv->code) {
3533 &error(&text('euserdbacl',
3534 $rv ? $rv->error : "Unknown error"));
3536 my ($user) = $rv->all_entries;
3538 # Find ACL sub-object for the module
3539 my $ldapm = $m || "global";
3541 my $rv = $dbh->search(
3542 base => $user->dn(),
3543 filter => '(cn='.$ldapm.')',
3545 if (!$rv || $rv->code) {
3546 &error(&text('euserdbacl',
3547 $rv ? $rv->error : "Unknown error"));
3549 my ($acl) = $rv->all_entries;
3551 foreach my $av ($acl->get_value(
3552 'webminAclEntry')) {
3553 my ($a, $v) = split(/=/, $av,2);
3559 &disconnect_userdb($userdb, $dbh);
3563 # Read from local files
3564 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3565 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3567 "$config_directory/$m/$remote_user.acl",\%rv);
3571 if ($tconfig{'preload_functions'}) {
3572 &load_theme_library();
3574 if (defined(&theme_get_module_acl)) {
3575 %rv = &theme_get_module_acl($u, $m, \%rv);
3580 =head2 get_group_module_acl(group, [module], [no-default])
3582 Returns the ACL for a Webmin group, in an optional module (which defaults to
3583 the current module).
3586 sub get_group_module_acl
3589 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3590 my $mdir = &module_root_directory($m);
3593 &read_file_cached("$mdir/defaultacl", \%rv);
3596 my $userdb = &get_userdb_string();
3599 # Look for this group in the user/group DB
3600 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3601 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3602 if ($proto eq "mysql" || $proto eq "postgresql") {
3603 # Find the group in the SQL DB
3604 my $cmd = $dbh->prepare(
3605 "select id from webmin_group where name = ?");
3606 $cmd && $cmd->execute($g) ||
3607 &error(&text('egroupdbacl', $dbh->errstr));
3608 my ($id) = $cmd->fetchrow();
3609 $foundindb = 1 if (defined($id));
3612 # Fetch ACLs with SQL
3614 my $cmd = $dbh->prepare(
3615 "select attr,value from webmin_group_acl ".
3616 "where id = ? and module = ?");
3617 $cmd && $cmd->execute($id, $m) ||
3618 &error(&text('egroupdbacl', $dbh->errstr));
3619 while(my ($a, $v) = $cmd->fetchrow()) {
3625 elsif ($proto eq "ldap") {
3626 # Find group in LDAP
3627 my $rv = $dbh->search(
3629 filter => '(&(cn='.$g.')(objectClass='.
3630 $args->{'groupclass'}.'))',
3632 if (!$rv || $rv->code) {
3633 &error(&text('egroupdbacl',
3634 $rv ? $rv->error : "Unknown error"));
3636 my ($group) = $rv->all_entries;
3638 # Find ACL sub-object for the module
3639 my $ldapm = $m || "global";
3641 my $rv = $dbh->search(
3642 base => $group->dn(),
3643 filter => '(cn='.$ldapm.')',
3645 if (!$rv || $rv->code) {
3646 &error(&text('egroupdbacl',
3647 $rv ? $rv->error : "Unknown error"));
3649 my ($acl) = $rv->all_entries;
3651 foreach my $av ($acl->get_value(
3652 'webminAclEntry')) {
3653 my ($a, $v) = split(/=/, $av, 2);
3659 &disconnect_userdb($userdb, $dbh);
3662 # Read from local files
3663 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3665 if (defined(&theme_get_module_acl)) {
3666 %rv = &theme_get_module_acl($g, $m, \%rv);
3671 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3673 Updates the acl hash for some user and module. The parameters are :
3675 =item acl - Hash reference for the new access control options, or undef to clear
3677 =item user - User to update, defaulting to the current user.
3679 =item module - Module to update, defaulting to the caller.
3681 =item never-update-group - Never update the user's group's ACL
3686 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3687 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3688 if (!$_[3] && &foreign_check("acl")) {
3689 # Check if this user is a member of a group, and if he gets the
3690 # module from a group. If so, update its ACL as well
3691 &foreign_require("acl", "acl-lib.pl");
3693 foreach my $g (&acl::list_groups()) {
3694 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3695 &indexof($m, @{$g->{'modules'}}) >= 0) {
3701 &save_group_module_acl($_[0], $group->{'name'}, $m);
3705 my $userdb = &get_userdb_string();
3707 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3708 # Look for this user in the user/group DB
3709 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3710 ref($dbh) || &error(&text('euserdbacl', $dbh));
3711 if ($proto eq "mysql" || $proto eq "postgresql") {
3712 # Find the user in the SQL DB
3713 my $cmd = $dbh->prepare(
3714 "select id from webmin_user where name = ?");
3715 $cmd && $cmd->execute($u) ||
3716 &error(&text('euserdbacl2', $dbh->errstr));
3717 my ($id) = $cmd->fetchrow();
3718 $foundindb = 1 if (defined($id));
3721 # Replace ACLs for user
3723 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3724 "where id = ? and module = ?");
3725 $cmd && $cmd->execute($id, $m) ||
3726 &error(&text('euserdbacl', $dbh->errstr));
3729 my $cmd = $dbh->prepare(
3730 "insert into webmin_user_acl ".
3731 "(id,module,attr,value) values (?,?,?,?)");
3732 $cmd || &error(&text('euserdbacl2',
3734 foreach my $a (keys %{$_[0]}) {
3735 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3736 &error(&text('euserdbacl2',
3743 elsif ($proto eq "ldap") {
3744 # Find the user in LDAP
3745 my $rv = $dbh->search(
3747 filter => '(&(cn='.$u.')(objectClass='.
3748 $args->{'userclass'}.'))',
3750 if (!$rv || $rv->code) {
3751 &error(&text('euserdbacl',
3752 $rv ? $rv->error : "Unknown error"));
3754 my ($user) = $rv->all_entries;
3757 # Find the ACL sub-object for the module
3759 my $ldapm = $m || "global";
3760 my $rv = $dbh->search(
3761 base => $user->dn(),
3762 filter => '(cn='.$ldapm.')',
3764 if (!$rv || $rv->code) {
3765 &error(&text('euserdbacl',
3766 $rv ? $rv->error : "Unknown error"));
3768 my ($acl) = $rv->all_entries;
3771 foreach my $a (keys %{$_[0]}) {
3772 push(@al, $a."=".$_[0]->{$a});
3776 $rv = $dbh->modify($acl->dn(),
3777 replace => { "webminAclEntry", \@al });
3781 my @attrs = ( "cn", $ldapm,
3782 "objectClass", "webminAcl",
3783 "webminAclEntry", \@al );
3784 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3787 if (!$rv || $rv->code) {
3788 &error(&text('euserdbacl2',
3789 $rv ? $rv->error : "Unknown error"));
3793 &disconnect_userdb($userdb, $dbh);
3797 # Save ACL to local file
3798 if (!-d "$config_directory/$m") {
3799 mkdir("$config_directory/$m", 0755);
3802 &write_file("$config_directory/$m/$u.acl", $_[0]);
3805 &unlink_file("$config_directory/$m/$u.acl");
3810 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3812 Updates the acl hash for some group and module. The parameters are :
3814 =item acl - Hash reference for the new access control options.
3816 =item group - Group name to update.
3818 =item module - Module to update, defaulting to the caller.
3820 =item never-update-group - Never update the parent group's ACL
3823 sub save_group_module_acl
3826 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3827 if (!$_[3] && &foreign_check("acl")) {
3828 # Check if this group is a member of a group, and if it gets the
3829 # module from a group. If so, update the parent ACL as well
3830 &foreign_require("acl", "acl-lib.pl");
3832 foreach my $pg (&acl::list_groups()) {
3833 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3834 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3840 &save_group_module_acl($_[0], $group->{'name'}, $m);
3844 my $userdb = &get_userdb_string();
3847 # Look for this group in the user/group DB
3848 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3849 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3850 if ($proto eq "mysql" || $proto eq "postgresql") {
3851 # Find the group in the SQL DB
3852 my $cmd = $dbh->prepare(
3853 "select id from webmin_group where name = ?");
3854 $cmd && $cmd->execute($g) ||
3855 &error(&text('egroupdbacl2', $dbh->errstr));
3856 my ($id) = $cmd->fetchrow();
3857 $foundindb = 1 if (defined($id));
3860 # Replace ACLs for group
3862 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3863 "where id = ? and module = ?");
3864 $cmd && $cmd->execute($id, $m) ||
3865 &error(&text('egroupdbacl', $dbh->errstr));
3868 my $cmd = $dbh->prepare(
3869 "insert into webmin_group_acl ".
3870 "(id,module,attr,value) values (?,?,?,?)");
3871 $cmd || &error(&text('egroupdbacl2',
3873 foreach my $a (keys %{$_[0]}) {
3874 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3875 &error(&text('egroupdbacl2',
3882 elsif ($proto eq "ldap") {
3883 # Find the group in LDAP
3884 my $rv = $dbh->search(
3886 filter => '(&(cn='.$g.')(objectClass='.
3887 $args->{'groupclass'}.'))',
3889 if (!$rv || $rv->code) {
3890 &error(&text('egroupdbacl',
3891 $rv ? $rv->error : "Unknown error"));
3893 my ($group) = $rv->all_entries;
3895 my $ldapm = $m || "global";
3897 # Find the ACL sub-object for the module
3899 my $rv = $dbh->search(
3900 base => $group->dn(),
3901 filter => '(cn='.$ldapm.')',
3903 if (!$rv || $rv->code) {
3904 &error(&text('egroupdbacl',
3905 $rv ? $rv->error : "Unknown error"));
3907 my ($acl) = $rv->all_entries;
3910 foreach my $a (keys %{$_[0]}) {
3911 push(@al, $a."=".$_[0]->{$a});
3915 $rv = $dbh->modify($acl->dn(),
3916 replace => { "webminAclEntry", \@al });
3920 my @attrs = ( "cn", $ldapm,
3921 "objectClass", "webminAcl",
3922 "webminAclEntry", \@al );
3923 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
3926 if (!$rv || $rv->code) {
3927 &error(&text('egroupdbacl2',
3928 $rv ? $rv->error : "Unknown error"));
3932 &disconnect_userdb($userdb, $dbh);
3936 # Save ACL to local file
3937 if (!-d "$config_directory/$m") {
3938 mkdir("$config_directory/$m", 0755);
3941 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3944 &unlink_file("$config_directory/$m/$g.gacl");
3951 This function must be called by all Webmin CGI scripts, either directly or
3952 indirectly via a per-module lib.pl file. It performs a number of initialization
3953 and housekeeping tasks, such as working out the module name, checking that the
3954 current user has access to the module, and populating global variables. Some
3955 of the variables set include :
3957 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3959 =item $var_directory - Base logs directory, typically /var/webmin
3961 =item %config - Per-module configuration.
3963 =item %gconfig - Global configuration.
3965 =item $scriptname - Base name of the current perl script.
3967 =item $module_name - The name of the current module.
3969 =item $module_config_directory - The config directory for this module.
3971 =item $module_config_file - The config file for this module.
3973 =item $module_root_directory - This module's code directory.
3975 =item $webmin_logfile - The detailed logfile for webmin.
3977 =item $remote_user - The actual username used to login to webmin.
3979 =item $base_remote_user - The username whose permissions are in effect.
3981 =item $current_theme - The theme currently in use.
3983 =item $root_directory - The first root directory of this webmin install.
3985 =item @root_directories - All root directories for this webmin install.
3990 # Record first process ID that called this, so we know when it exited to clean
3992 $main::initial_process_id ||= $$;
3994 # Configuration and spool directories
3995 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3996 die "WEBMIN_CONFIG not set";
3998 $config_directory = $ENV{'WEBMIN_CONFIG'};
3999 if (!defined($ENV{'WEBMIN_VAR'})) {
4000 open(VARPATH, "$config_directory/var-path");
4001 chop($var_directory = <VARPATH>);
4005 $var_directory = $ENV{'WEBMIN_VAR'};
4007 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
4008 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
4010 if ($ENV{'SESSION_ID'}) {
4011 # Hide this variable from called programs, but keep it for internal use
4012 $main::session_id = $ENV{'SESSION_ID'};
4013 delete($ENV{'SESSION_ID'});
4015 if ($ENV{'REMOTE_PASS'}) {
4016 # Hide the password too
4017 $main::remote_pass = $ENV{'REMOTE_PASS'};
4018 delete($ENV{'REMOTE_PASS'});
4021 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
4022 # Looks like we are running setuid, but the real UID hasn't been set.
4023 # Do so now, so that executed programs don't get confused
4028 # Read the webmin global config file. This contains the OS type and version,
4029 # OS specific configuration and global options such as proxy servers
4030 $config_file = "$config_directory/config";
4032 &read_file_cached($config_file, \%gconfig);
4033 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
4034 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
4036 # Work out of this is a web, command line or cron job
4037 if (!$main::webmin_script_type) {
4038 if ($ENV{'SCRIPT_NAME'}) {
4040 $main::webmin_script_type = 'web';
4043 # Cron jobs have no TTY
4044 if ($gconfig{'os_type'} eq 'windows' ||
4045 open(DEVTTY, ">/dev/tty")) {
4046 $main::webmin_script_type = 'cmd';
4050 $main::webmin_script_type = 'cron';
4055 # If debugging is enabled, open the debug log
4056 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
4057 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
4058 if ($gconfig{'debug_size'}) {
4059 my @st = stat($dlog);
4060 if ($st[7] > $gconfig{'debug_size'}) {
4061 rename($dlog, $dlog.".0");
4064 open(main::DEBUGLOG, ">>$dlog");
4065 $main::opened_debug_log = 1;
4067 if ($gconfig{'debug_what_start'}) {
4068 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4069 $main::debug_log_start_time = time();
4070 &webmin_debug_log("START", "script=$script_name");
4071 $main::debug_log_start_module = $module_name;
4075 # Set PATH and LD_LIBRARY_PATH
4076 if ($gconfig{'path'}) {
4077 if ($gconfig{'syspath'}) {
4079 $ENV{'PATH'} = $gconfig{'path'};
4083 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
4086 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
4088 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
4089 if ($gconfig{'http_proxy'}) {
4090 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
4092 if ($gconfig{'ftp_proxy'}) {
4093 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
4095 if ($gconfig{'noproxy'}) {
4096 $ENV{'no_proxy'} = $gconfig{'noproxy'};
4099 # Find all root directories
4101 if (&get_miniserv_config(\%miniserv)) {
4102 @root_directories = ( $miniserv{'root'} );
4103 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
4104 push(@root_directories, $miniserv{"extraroot_$i"});
4108 # Work out which module we are in, and read the per-module config file
4109 $0 =~ s/\\/\//g; # Force consistent path on Windows
4110 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
4111 # In a foreign call - use the module name given
4112 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
4113 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
4114 @root_directories = ( $root_directory ) if (!@root_directories);
4116 elsif ($ENV{'SCRIPT_NAME'}) {
4117 my $sn = $ENV{'SCRIPT_NAME'};
4118 $sn =~ s/^$gconfig{'webprefix'}//
4119 if (!$gconfig{'webprefixnoredir'});
4120 if ($sn =~ /^\/([^\/]+)\//) {
4121 # Get module name from CGI path
4124 if ($ENV{'SERVER_ROOT'}) {
4125 $root_directory = $ENV{'SERVER_ROOT'};
4127 elsif ($ENV{'SCRIPT_FILENAME'}) {
4128 $root_directory = $ENV{'SCRIPT_FILENAME'};
4129 $root_directory =~ s/$sn$//;
4131 @root_directories = ( $root_directory ) if (!@root_directories);
4134 # Get root directory from miniserv.conf, and deduce module name from $0
4135 $root_directory = $root_directories[0];
4137 foreach my $r (@root_directories) {
4138 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
4139 # Under a module directory
4144 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
4150 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
4153 # Set the umask based on config
4154 if ($gconfig{'umask'} && !$main::umask_already++) {
4155 umask(oct($gconfig{'umask'}));
4158 # If this is a cron job or other background task, set the nice level
4159 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4161 if ($gconfig{'nice'}) {
4162 eval 'POSIX::nice($gconfig{\'nice\'});';
4165 # Set IO scheduling class and priority
4166 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4168 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4169 if ($gconfig{'sclass'} ne '');
4170 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4171 if ($gconfig{'sprio'} ne '');
4173 &execute_command("$cmd >/dev/null 2>&1");
4176 $main::nice_already++;
4179 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4180 $base_remote_user = $u;
4181 $remote_user = $ENV{'REMOTE_USER'};
4183 # Work out if user is definitely in the DB, and if so get his attrs
4184 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4185 %remote_user_attrs = ( );
4186 if ($remote_user_proto) {
4187 my $userdb = &get_userdb_string();
4188 my ($dbh, $proto, $prefix, $args) =
4189 $userdb ? &connect_userdb($userdb) : ( );
4191 if ($proto eq "mysql" || $proto eq "postgresql") {
4192 # Read attrs from SQL
4193 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
4194 if ($cmd && $cmd->execute($base_remote_user)) {
4195 while(my ($attr, $value) = $cmd->fetchrow()) {
4196 $remote_user_attrs{$attr} = $value;
4201 elsif ($proto eq "ldap") {
4202 # Read attrs from LDAP
4203 my $rv = $dbh->search(
4205 filter => '(&(cn='.$base_remote_user.')'.
4207 $args->{'userclass'}.'))',
4209 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4211 foreach $la ($u->get_value('webminAttr')) {
4212 my ($attr, $value) = split(/=/, $la, 2);
4213 $remote_user_attrs{$attr} = $value;
4217 &disconnect_userdb($userdb, $dbh);
4222 # Find and load the configuration file for this module
4223 my (@ruinfo, $rgroup);
4224 $module_config_directory = "$config_directory/$module_name";
4225 if (&get_product_name() eq "usermin" &&
4226 -r "$module_config_directory/config.$remote_user") {
4228 $module_config_file = "$module_config_directory/config.$remote_user";
4230 elsif (&get_product_name() eq "usermin" &&
4231 (@ruinfo = getpwnam($remote_user)) &&
4232 ($rgroup = getgrgid($ruinfo[3])) &&
4233 -r "$module_config_directory/config.\@$rgroup") {
4234 # Based on group name
4235 $module_config_file = "$module_config_directory/config.\@$rgroup";
4239 $module_config_file = "$module_config_directory/config";
4242 &read_file_cached($module_config_file, \%config);
4244 # Fix up windows-specific substitutions in values
4245 foreach my $k (keys %config) {
4246 if ($config{$k} =~ /\$\{systemroot\}/) {
4247 my $root = &get_windows_root();
4248 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4253 # Record the initial module
4254 $main::initial_module_name ||= $module_name;
4256 # Set some useful variables
4258 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4259 $gconfig{'mobile_theme'} :
4260 defined($remote_user_attrs{'theme'}) ?
4261 $remote_user_attrs{'theme'} :
4262 defined($gconfig{'theme_'.$remote_user}) ?
4263 $gconfig{'theme_'.$remote_user} :
4264 defined($gconfig{'theme_'.$base_remote_user}) ?
4265 $gconfig{'theme_'.$base_remote_user} :
4267 @current_themes = split(/\s+/, $current_themes);
4268 $current_theme = $current_themes[0];
4269 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4270 $theme_root_directory = $theme_root_directories[0];
4271 @theme_configs = ( );
4272 foreach my $troot (@theme_root_directories) {
4274 &read_file_cached("$troot/config", \%onetconfig);
4275 &read_file_cached("$troot/config", \%tconfig);
4276 push(@theme_configs, \%onetconfig);
4278 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4279 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4281 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4282 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4284 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4285 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4286 if ($tconfig{'preload_functions'}) {
4287 # Force load of theme functions right now, if requested
4288 &load_theme_library();
4290 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4291 # Load the theme's Webmin:: package classes
4292 do "$theme_root_directory/$tconfig{'oofunctions'}";
4297 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4298 : "$var_directory/webmin.log";
4300 # Load language strings into %text
4301 my @langs = &list_languages();
4303 if ($gconfig{'acceptlang'}) {
4304 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4305 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4307 $accepted_lang = $al->{'lang'};
4312 $current_lang = $force_lang ? $force_lang :
4313 $accepted_lang ? $accepted_lang :
4314 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4315 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4316 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4317 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4318 foreach my $l (@langs) {
4319 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4321 @lang_order_list = &unique($default_lang,
4322 split(/:/, $current_lang_info->{'fallback'}),
4324 %text = &load_language($module_name);
4325 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4327 # Get the %module_info for this module
4329 my ($mi) = grep { $_->{'dir'} eq $module_name }
4330 &get_all_module_infos(2);
4331 %module_info = %$mi;
4332 $module_root_directory = &module_root_directory($module_name);
4335 if ($module_name && !$main::no_acl_check &&
4336 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4337 # Check if the HTTP user can access this module
4338 if (!&foreign_available($module_name)) {
4339 if (!&foreign_check($module_name)) {
4340 &error(&text('emodulecheck',
4341 "<i>$module_info{'desc'}</i>"));
4344 &error(&text('emodule', "<i>$u</i>",
4345 "<i>$module_info{'desc'}</i>"));
4348 $main::no_acl_check++;
4351 # Check the Referer: header for nasty redirects
4352 my @referers = split(/\s+/, $gconfig{'referers'});
4354 my $r = $ENV{'HTTP_REFERER'};
4355 if ($r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?\[([^\]]+)\]/ ||
4356 $r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4359 my $http_host = $ENV{'HTTP_HOST'};
4360 $http_host =~ s/:\d+$//;
4361 $http_host =~ s/^\[(\S+)\]$/$1/;
4362 my $unsafe_index = $unsafe_index_cgi ||
4363 &get_module_variable('$unsafe_index_cgi');
4365 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4366 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4368 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4369 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4370 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4371 ($referer_site && $referer_site ne $http_host &&
4372 &indexof($referer_site, @referers) < 0 ||
4373 !$referer_site && $gconfig{'referers_none'}) &&
4374 !$trust_unknown_referers &&
4375 !&get_module_variable('$trust_unknown_referers')) {
4376 # Looks like a link from elsewhere .. show an error
4377 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4379 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4380 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4381 if ($referer_site) {
4383 print &text('referer_warn',
4384 "<tt>".&html_escape($r)."</tt>", $url);
4386 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4387 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4390 # No referer info given
4391 print &text('referer_warn_unknown', $url),"<p>\n";
4392 print &text('referer_fix1u'),"<p>\n";
4393 print &text('referer_fix2u'),"<p>\n";
4397 &footer("/", $text{'index'});
4400 $main::no_referers_check++;
4401 $main::completed_referers_check++;
4403 # Call theme post-init
4404 if (defined(&theme_post_init_config)) {
4405 &theme_post_init_config(@_);
4408 # Record that we have done the calling library in this package
4409 my ($callpkg, $lib) = caller();
4411 $main::done_foreign_require{$callpkg,$lib} = 1;
4413 # If a licence checking is enabled, do it now
4414 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4415 &foreign_check($gconfig{'licence_module'}) &&
4416 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4417 my $oldpwd = &get_current_dir();
4418 $main::done_licence_module_check++;
4419 $main::licence_module = $gconfig{'licence_module'};
4420 &foreign_require($main::licence_module, "licence_check.pl");
4421 ($main::licence_status, $main::licence_message) =
4422 &foreign_call($main::licence_module, "check_licence");
4426 # Export global variables to caller
4427 if ($main::export_to_caller) {
4428 foreach my $v ('$config_file', '%gconfig', '$null_file',
4429 '$path_separator', '@root_directories',
4430 '$root_directory', '$module_name',
4431 '$base_remote_user', '$remote_user',
4432 '$remote_user_proto', '%remote_user_attrs',
4433 '$module_config_directory', '$module_config_file',
4434 '%config', '@current_themes', '$current_theme',
4435 '@theme_root_directories', '$theme_root_directory',
4436 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4437 '$webmin_logfile', '$current_lang',
4438 '$current_lang_info', '@lang_order_list', '%text',
4439 '%module_info', '$module_root_directory') {
4440 my ($vt, $vn) = split('', $v, 2);
4441 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4448 =head2 load_language([module], [directory])
4450 Returns a hashtable mapping text codes to strings in the appropriate language,
4451 based on the $current_lang global variable, which is in turn set based on
4452 the Webmin user's selection. The optional module parameter tells the function
4453 which module to load strings for, and defaults to the calling module. The
4454 optional directory parameter can be used to load strings from a directory
4457 In regular module development you will never need to call this function
4458 directly, as init_config calls it for you, and places the module's strings
4459 into the %text hash.
4465 my $root = $root_directory;
4466 my $ol = $gconfig{'overlang'};
4467 my ($dir) = ($_[1] || "lang");
4469 # Read global lang files
4470 foreach my $o (@lang_order_list) {
4471 my $ok = &read_file_cached_with_stat("$root/$dir/$o", \%text);
4472 return () if (!$ok && $o eq $default_lang);
4475 foreach my $o (@lang_order_list) {
4476 &read_file_cached("$root/$ol/$o", \%text);
4479 &read_file_cached("$config_directory/custom-lang", \%text);
4480 foreach my $o (@lang_order_list) {
4481 next if ($o eq "en");
4482 &read_file_cached("$config_directory/custom-lang.$o", \%text);
4484 my $norefs = $text{'__norefs'};
4487 # Read module's lang files
4488 delete($text{'__norefs'});
4489 my $mdir = &module_root_directory($_[0]);
4490 foreach my $o (@lang_order_list) {
4491 &read_file_cached_with_stat("$mdir/$dir/$o", \%text);
4494 foreach my $o (@lang_order_list) {
4495 &read_file_cached("$mdir/$ol/$o", \%text);
4498 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4499 foreach my $o (@lang_order_list) {
4500 next if ($o eq "en");
4501 &read_file_cached("$config_directory/$_[0]/custom-lang.$o",
4504 $norefs = $text{'__norefs'} if ($norefs);
4507 # Replace references to other strings
4509 foreach $k (keys %text) {
4510 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4514 if (defined(&theme_load_language)) {
4515 &theme_load_language(\%text, $_[0]);
4520 =head2 text_subs(string)
4522 Used internally by load_language to expand $code substitutions in language
4528 if (substr($_[0], 0, 8) eq "include:") {
4531 open(INCLUDE, substr($_[0], 8));
4539 my $t = $_[1]->{$_[0]};
4540 return defined($t) ? $t : '$'.$_[0];
4544 =head2 text(message, [substitute]+)
4546 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4547 the substitute parameters. This makes it easy to use strings with placeholders
4548 that get replaced with programmatically generated text. For example :
4550 print &text('index_hello', $remote_user),"<p>\n";
4555 my $t = &get_module_variable('%text', 1);
4556 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4557 for(my $i=1; $i<@_; $i++) {
4558 $rv =~ s/\$$i/$_[$i]/g;
4563 =head2 encode_base64(string)
4565 Encodes a string into base64 format, for use in MIME email or HTTP
4566 authorization headers.
4572 pos($_[0]) = 0; # ensure start at the beginning
4573 while ($_[0] =~ /(.{1,57})/gs) {
4574 $res .= substr(pack('u57', $1), 1)."\n";
4577 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4578 my $padding = (3 - length($_[0]) % 3) % 3;
4579 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4583 =head2 decode_base64(string)
4585 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4592 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4593 if (length($str) % 4) {
4596 $str =~ s/=+$//; # remove padding
4597 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4598 while ($str =~ /(.{1,60})/gs) {
4599 my $len = chr(32 + length($1)*3/4); # compute length byte
4600 $res .= unpack("u", $len . $1 ); # uudecode
4605 =head2 get_module_info(module, [noclone], [forcache])
4607 Returns a hash containg details of the given module. Some useful keys are :
4609 =item dir - The module directory, like sendmail.
4611 =item desc - Human-readable description, in the current users' language.
4613 =item version - Optional module version number.
4615 =item os_support - List of supported operating systems and versions.
4617 =item category - Category on Webmin's left menu, like net.
4622 return () if ($_[0] =~ /^\./);
4623 my (%rv, $clone, $o);
4624 my $mdir = &module_root_directory($_[0]);
4625 &read_file_cached("$mdir/module.info", \%rv) || return ();
4627 # A clone is a module that links to another directory under the root
4628 foreach my $r (@root_directories) {
4629 if (&is_under_directory($r, $mdir)) {
4635 foreach $o (@lang_order_list) {
4636 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4637 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4639 if ($clone && !$_[1] && $config_directory) {
4640 $rv{'clone'} = $rv{'desc'};
4641 &read_file("$config_directory/$_[0]/clone", \%rv);
4644 my %module_categories;
4645 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4646 my $pn = &get_product_name();
4647 if (defined($rv{'category_'.$pn})) {
4648 # Can override category for webmin/usermin
4649 $rv{'category'} = $rv{'category_'.$pn};
4651 $rv{'realcategory'} = $rv{'category'};
4652 $rv{'category'} = $module_categories{$_[0]}
4653 if (defined($module_categories{$_[0]}));
4655 # Apply description overrides
4656 $rv{'realdesc'} = $rv{'desc'};
4658 &read_file_cached("$config_directory/webmin.descs", \%descs);
4659 if ($descs{$_[0]}) {
4660 $rv{'desc'} = $descs{$_[0]};
4662 foreach my $o (@lang_order_list) {
4663 my $ov = $descs{$_[0]." ".$o} || $descs{$_[0]."_".$o};
4664 $rv{'desc'} = $ov if ($ov);
4668 # Apply per-user description overridde
4669 my %gaccess = &get_module_acl(undef, "");
4670 if ($gaccess{'desc_'.$_[0]}) {
4671 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4675 if ($rv{'longdesc'}) {
4676 # All standard modules have an index.cgi
4677 $rv{'index_link'} = 'index.cgi';
4680 # Call theme-specific override function
4681 if (defined(&theme_get_module_info)) {
4682 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4688 =head2 get_all_module_infos(cachemode)
4690 Returns a list contains the information on all modules in this webmin
4691 install, including clones. Uses caching to reduce the number of module.info
4692 files that need to be read. Each element of the array is a hash reference
4693 in the same format as returned by get_module_info. The cache mode flag can be :
4694 0 = read and write, 1 = don't read or write, 2 = read only
4697 sub get_all_module_infos
4701 # Is the cache out of date? (ie. have any of the root's changed?)
4702 my $cache_file = "$config_directory/module.infos.cache";
4704 if (&read_file_cached($cache_file, \%cache)) {
4705 foreach my $r (@root_directories) {
4707 if ($st[9] != $cache{'mtime_'.$r}) {
4717 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4718 # Can use existing module.info cache
4720 foreach my $k (keys %cache) {
4721 if ($k =~ /^(\S+) (\S+)$/) {
4722 $mods{$1}->{$2} = $cache{$k};
4725 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4728 # Need to rebuild cache
4730 foreach my $r (@root_directories) {
4732 foreach my $m (readdir(DIR)) {
4733 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4734 my %minfo = &get_module_info($m, 0, 1);
4735 next if (!%minfo || !$minfo{'dir'});
4737 foreach $k (keys %minfo) {
4738 $cache{"${m} ${k}"} = $minfo{$k};
4743 $cache{'mtime_'.$r} = $st[9];
4745 $cache{'lang'} = $current_lang;
4746 if (!$_[0] && $< == 0 && $> == 0) {
4748 # Don't fail if cache write fails
4749 local $main::error_must_die = 1;
4750 &write_file($cache_file, \%cache);
4755 # Override descriptions for modules for current user
4756 my %gaccess = &get_module_acl(undef, "");
4757 foreach my $m (@rv) {
4758 if ($gaccess{"desc_".$m->{'dir'}}) {
4759 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4763 # Apply installed flags
4765 &read_file_cached("$config_directory/installed.cache", \%installed);
4766 foreach my $m (@rv) {
4767 $m->{'installed'} = $installed{$m->{'dir'}};
4773 =head2 get_theme_info(theme)
4775 Returns a hash containing a theme's details, taken from it's theme.info file.
4776 Some useful keys are :
4778 =item dir - The theme directory, like blue-theme.
4780 =item desc - Human-readable description, in the current users' language.
4782 =item version - Optional module version number.
4784 =item os_support - List of supported operating systems and versions.
4789 return () if ($_[0] =~ /^\./);
4791 my $tdir = &module_root_directory($_[0]);
4792 &read_file("$tdir/theme.info", \%rv) || return ();
4793 foreach my $o (@lang_order_list) {
4794 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4800 =head2 list_languages
4802 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4803 Each is a hash reference with the following keys :
4805 =item lang - The short language code, like es for Spanish.
4807 =item desc - A human-readable description, in English.
4809 =item charset - An optional character set to use when displaying the language.
4811 =item titles - Set to 1 only if Webmin has title images for the language.
4813 =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.
4818 if (!@main::list_languages_cache) {
4821 open(LANG, "$root_directory/lang_list.txt");
4823 if (/^(\S+)\s+(.*)/) {
4824 my $l = { 'desc' => $2 };
4825 foreach $o (split(/,/, $1)) {
4826 if ($o =~ /^([^=]+)=(.*)$/) {
4830 $l->{'index'} = scalar(@rv);
4831 push(@main::list_languages_cache, $l);
4835 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4836 @main::list_languages_cache;
4838 return @main::list_languages_cache;
4841 =head2 read_env_file(file, &hash, [include-commented])
4843 Similar to Webmin's read_file function, but handles files containing shell
4844 environment variables formatted like :
4849 The file parameter is the full path to the file to read, and hash a Perl hash
4850 ref to read names and values into.
4856 &open_readfile(FILE, $_[0]) || return 0;
4859 # Remove start of line comments
4863 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4864 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4865 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4873 =head2 write_env_file(file, &hash, [export])
4875 Writes out a hash to a file in name='value' format, suitable for use in a shell
4876 script. The parameters are :
4878 =item file - Full path for a file to write to
4880 =item hash - Hash reference of names and values to write.
4882 =item export - If set to 1, preceed each variable setting with the word 'export'.
4887 my $exp = $_[2] ? "export " : "";
4888 &open_tempfile(FILE, ">$_[0]");
4889 foreach my $k (keys %{$_[1]}) {
4890 my $v = $_[1]->{$k};
4891 if ($v =~ /^\S+$/) {
4892 &print_tempfile(FILE, "$exp$k=$v\n");
4895 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4898 &close_tempfile(FILE);
4901 =head2 lock_file(filename, [readonly], [forcefile])
4903 Lock a file for exclusive access. If the file is already locked, spin
4904 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4905 to work OK. The parameters are :
4907 =item filename - File or directory to lock.
4909 =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.
4911 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4916 my $realfile = &translate_filename($_[0]);
4917 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4918 my $no_lock = !&can_lock_file($realfile);
4919 my $lock_tries_count = 0;
4922 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4927 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4930 # Create the .lock file
4931 open(LOCKING, ">$realfile.lock") || return 0;
4932 my $lck = eval "flock(LOCKING, 2+4)";
4934 # Lock of lock file failed! Wait till later
4937 print LOCKING $$,"\n";
4938 eval "flock(LOCKING, 8)";
4941 $main::locked_file_list{$realfile} = int($_[1]);
4942 push(@main::temporary_files, "$realfile.lock");
4943 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4944 !&get_module_variable('$no_log_file_changes') &&
4946 # Grab a copy of this file for later diffing
4948 $main::locked_file_data{$realfile} = undef;
4950 $main::locked_file_type{$realfile} = 1;
4951 $main::locked_file_data{$realfile} = '';
4953 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4954 $main::locked_file_type{$realfile} = 2;
4955 $main::locked_file_data{$realfile} = $lnk;
4957 elsif (open(ORIGFILE, $realfile)) {
4958 $main::locked_file_type{$realfile} = 0;
4959 $main::locked_file_data{$realfile} = '';
4962 $main::locked_file_data{$realfile} .=$_;
4971 if ($lock_tries_count++ > 5*60) {
4972 # Give up after 5 minutes
4973 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4979 =head2 unlock_file(filename)
4981 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4982 file changes is enabled, then at unlock file a diff will be taken between the
4983 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4984 called. This can then be viewed in the Webmin Actions Log module.
4989 my $realfile = &translate_filename($_[0]);
4990 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4991 unlink("$realfile.lock") if (&can_lock_file($realfile));
4992 delete($main::locked_file_list{$realfile});
4993 if (exists($main::locked_file_data{$realfile})) {
4994 # Diff the new file with the old
4996 my $lnk = readlink($realfile);
4997 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4998 my $oldtype = $main::locked_file_type{$realfile};
4999 my $new = !defined($main::locked_file_data{$realfile});
5000 if ($new && !-e _) {
5001 # file doesn't exist, and never did! do nothing ..
5003 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
5004 # is (or was) a directory ..
5005 if (-d _ && !defined($main::locked_file_data{$realfile})) {
5006 push(@main::locked_file_diff,
5007 { 'type' => 'mkdir', 'object' => $realfile });
5009 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
5010 push(@main::locked_file_diff,
5011 { 'type' => 'rmdir', 'object' => $realfile });
5014 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
5015 # is (or was) a symlink ..
5016 if ($lnk && !defined($main::locked_file_data{$realfile})) {
5017 push(@main::locked_file_diff,
5018 { 'type' => 'symlink', 'object' => $realfile,
5021 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
5022 push(@main::locked_file_diff,
5023 { 'type' => 'unsymlink', 'object' => $realfile,
5024 'data' => $main::locked_file_data{$realfile} });
5026 elsif ($lnk ne $main::locked_file_data{$realfile}) {
5027 push(@main::locked_file_diff,
5028 { 'type' => 'resymlink', 'object' => $realfile,
5033 # is a file, or has changed type?!
5034 my ($diff, $delete_file);
5035 my $type = "modify";
5037 open(NEWFILE, ">$realfile");
5042 if (!defined($main::locked_file_data{$realfile})) {
5045 open(ORIGFILE, ">$realfile.webminorig");
5046 print ORIGFILE $main::locked_file_data{$realfile};
5048 $diff = &backquote_command(
5049 "diff ".quotemeta("$realfile.webminorig")." ".
5050 quotemeta($realfile)." 2>/dev/null");
5051 push(@main::locked_file_diff,
5052 { 'type' => $type, 'object' => $realfile,
5053 'data' => $diff } ) if ($diff);
5054 unlink("$realfile.webminorig");
5055 unlink($realfile) if ($delete_file);
5058 if ($gconfig{'logfullfiles'}) {
5059 # Add file details to list of those to fully log
5060 $main::orig_file_data{$realfile} ||=
5061 $main::locked_file_data{$realfile};
5062 $main::orig_file_type{$realfile} ||=
5063 $main::locked_file_type{$realfile};
5066 delete($main::locked_file_data{$realfile});
5067 delete($main::locked_file_type{$realfile});
5071 =head2 test_lock(file)
5073 Returns 1 if some file is currently locked, 0 if not.
5078 my $realfile = &translate_filename($_[0]);
5079 return 0 if (!$_[0]);
5080 return 1 if (defined($main::locked_file_list{$realfile}));
5081 return 0 if (!&can_lock_file($realfile));
5083 if (open(LOCKING, "$realfile.lock")) {
5088 return $pid && kill(0, $pid);
5091 =head2 unlock_all_files
5093 Unlocks all files locked by the current script.
5096 sub unlock_all_files
5098 foreach $f (keys %main::locked_file_list) {
5103 =head2 can_lock_file(file)
5105 Returns 1 if some file should be locked, based on the settings in the
5106 Webmin Configuration module. For internal use by lock_file only.
5111 if (&is_readonly_mode()) {
5112 return 0; # never lock in read-only mode
5114 elsif ($gconfig{'lockmode'} == 0) {
5117 elsif ($gconfig{'lockmode'} == 1) {
5121 # Check if under any of the directories
5123 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
5124 if (&same_file($d, $_[0]) ||
5125 &is_under_directory($d, $_[0])) {
5129 return $gconfig{'lockmode'} == 2 ? $match : !$match;
5133 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
5135 Log some action taken by a user. This is typically called at the end of a
5136 script, once all file changes are complete and all commands run. The
5139 =item action - A short code for the action being performed, like 'create'.
5141 =item type - A code for the type of object the action is performed to, like 'user'.
5143 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
5145 =item params - A hash ref of additional information about the action.
5147 =item module - Name of the module in which the action was performed, which defaults to the current module.
5149 =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.
5151 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
5153 =item client-ip - IP address of the browser that performed the action.
5158 return if (!$gconfig{'log'} || &is_readonly_mode());
5159 my $m = $_[4] ? $_[4] : &get_module_name();
5161 if ($gconfig{'logclear'}) {
5162 # check if it is time to clear the log
5163 my @st = stat("$webmin_logfile.time");
5164 my $write_logtime = 0;
5166 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
5167 # clear logfile and all diff files
5168 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
5169 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
5170 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
5171 unlink($webmin_logfile);
5178 if ($write_logtime) {
5179 open(LOGTIME, ">$webmin_logfile.time");
5180 print LOGTIME time(),"\n";
5185 # If an action script directory is defined, call the appropriate scripts
5186 if ($gconfig{'action_script_dir'}) {
5187 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
5188 my ($basedir) = $gconfig{'action_script_dir'};
5190 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
5193 opendir(DIR, $dir) or die "Can't open $dir: $!";
5194 while (defined($file = readdir(DIR))) {
5195 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
5196 if (-x "$dir/$file") {
5197 # Call a script notifying it of the action
5199 $ENV{'ACTION_MODULE'} = &get_module_name();
5200 $ENV{'ACTION_ACTION'} = $_[0];
5201 $ENV{'ACTION_TYPE'} = $_[1];
5202 $ENV{'ACTION_OBJECT'} = $_[2];
5203 $ENV{'ACTION_SCRIPT'} = $script_name;
5204 foreach my $p (keys %param) {
5205 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5207 system("$dir/$file", @_,
5208 "<$null_file", ">$null_file", "2>&1");
5216 # should logging be done at all?
5217 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5218 split(/\s+/, $gconfig{'logusers'})) < 0);
5219 return if ($gconfig{'logmodules'} && &indexof($m,
5220 split(/\s+/, $gconfig{'logmodules'})) < 0);
5224 my @tm = localtime($now);
5225 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5226 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5227 my $idprefix = substr($now, 0, 5);
5228 $main::action_id_count++;
5229 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5230 $id, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5231 $tm[2], $tm[1], $tm[0],
5232 $remote_user || '-',
5233 $main::session_id || '-',
5234 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5235 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5236 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5238 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5239 my $v = $_[3]->{$k};
5245 elsif (ref($v) eq 'ARRAY') {
5249 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5250 $line .= " $k='$vv'";
5254 foreach $vv (split(/\0/, $v)) {
5256 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5257 $line .= " $k='$vv'";
5260 $param{$k} = join(" ", @pv);
5262 open(WEBMINLOG, ">>$webmin_logfile");
5263 print WEBMINLOG $line,"\n";
5265 if ($gconfig{'logperms'}) {
5266 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5269 chmod(0600, $webmin_logfile);
5272 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5273 # Find and record the changes made to any locked files, or commands run
5275 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5276 foreach my $d (@main::locked_file_diff) {
5277 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$idprefix", 0700);
5278 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id", 0700);
5279 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i");
5280 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5281 print DIFFLOG $d->{'data'};
5283 if ($d->{'input'}) {
5285 ">$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i.input");
5286 print DIFFLOG $d->{'input'};
5289 if ($gconfig{'logperms'}) {
5290 chmod(oct($gconfig{'logperms'}),
5291 "$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i",
5292 "$ENV{'WEBMIN_VAR'}/diffs/$idprefix/$id/$i.input");
5296 @main::locked_file_diff = undef;
5299 if ($gconfig{'logfullfiles'}) {
5300 # Save the original contents of any modified files
5302 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5303 foreach my $f (keys %main::orig_file_data) {
5304 mkdir("$ENV{'WEBMIN_VAR'}/files/$idprefix", 0700);
5305 mkdir("$ENV{'WEBMIN_VAR'}/files/$idprefix/$id", 0700);
5306 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$idprefix/$id/$i");
5307 if (!defined($main::orig_file_type{$f})) {
5308 print ORIGLOG -1," ",$f,"\n";
5311 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5313 print ORIGLOG $main::orig_file_data{$f};
5315 if ($gconfig{'logperms'}) {
5316 chmod(oct($gconfig{'logperms'}),
5317 "$ENV{'WEBMIN_VAR'}/files/$idprefix/$id.$i");
5321 %main::orig_file_data = undef;
5322 %main::orig_file_type = undef;
5325 if ($miniserv::page_capture_out) {
5326 # Save the whole page output
5327 mkdir("$ENV{'WEBMIN_VAR'}/output", 0700);
5328 mkdir("$ENV{'WEBMIN_VAR'}/output/$idprefix", 0700);
5329 open(PAGEOUT, ">$ENV{'WEBMIN_VAR'}/output/$idprefix/$id");
5330 print PAGEOUT $miniserv::page_capture_out;
5332 if ($gconfig{'logperms'}) {
5333 chmod(oct($gconfig{'logperms'}),
5334 "$ENV{'WEBMIN_VAR'}/output/$idprefix/$id");
5336 $miniserv::page_capture_out = undef;
5340 if ($gconfig{'logsyslog'}) {
5341 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5342 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5343 setlogsock("inet");';
5345 # Syslog module is installed .. try to convert to a
5346 # human-readable form
5348 my $mod = &get_module_name();
5349 my $mdir = module_root_directory($mod);
5350 if (-r "$mdir/log_parser.pl") {
5351 &foreign_require($mod, "log_parser.pl");
5353 foreach my $k (keys %{$_[3]}) {
5354 my $v = $_[3]->{$k};
5355 if (ref($v) eq 'ARRAY') {
5356 $params{$k} = join("\0", @$v);
5362 $msg = &foreign_call($mod, "parse_webmin_log",
5363 $remote_user, $script_name,
5364 $_[0], $_[1], $_[2], \%params);
5365 $msg =~ s/<[^>]*>//g; # Remove tags
5367 elsif ($_[0] eq "_config_") {
5368 my %wtext = &load_language("webminlog");
5369 $msg = $wtext{'search_config'};
5371 $msg ||= "$_[0] $_[1] $_[2]";
5372 my %info = &get_module_info($m);
5373 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5378 =head2 additional_log(type, object, data, [input])
5380 Records additional log data for an upcoming call to webmin_log, such
5381 as a command that was run or SQL that was executed. Typically you will never
5382 need to call this function directory.
5387 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5388 push(@main::locked_file_diff,
5389 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5390 'input' => $_[3] } );
5394 =head2 webmin_debug_log(type, message)
5396 Write something to the Webmin debug log. For internal use only.
5399 sub webmin_debug_log
5401 my ($type, $msg) = @_;
5402 return 0 if (!$main::opened_debug_log);
5403 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5404 if ($gconfig{'debug_modules'}) {
5405 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5406 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5409 eval 'use Time::HiRes qw(gettimeofday); ($now, $ms) = gettimeofday';
5411 my @tm = localtime($now);
5413 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d.%6.6d] %s %s %s %s \"%s\"",
5414 $$, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5415 $tm[2], $tm[1], $tm[0], $ms,
5416 $remote_user || "-",
5417 $ENV{'REMOTE_HOST'} || "-",
5418 &get_module_name() || "-",
5421 seek(main::DEBUGLOG, 0, 2);
5422 print main::DEBUGLOG $line."\n";
5426 =head2 system_logged(command)
5428 Just calls the Perl system() function, but also logs the command run.
5433 if (&is_readonly_mode()) {
5434 print STDERR "Vetoing command $_[0]\n";
5437 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5438 my $cmd = join(" ", @realcmd);
5440 if ($cmd =~ s/(\s*&\s*)$//) {
5443 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5444 $cmd =~ s/^\((.*)\)\s*$/$1/;
5446 &additional_log('exec', undef, $cmd);
5447 return system(@realcmd);
5450 =head2 backquote_logged(command)
5452 Executes a command and returns the output (like `command`), but also logs it.
5455 sub backquote_logged
5457 if (&is_readonly_mode()) {
5459 print STDERR "Vetoing command $_[0]\n";
5462 my $realcmd = &translate_command($_[0]);
5465 if ($cmd =~ s/(\s*&\s*)$//) {
5468 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5469 $cmd =~ s/^\((.*)\)\s*$/$1/;
5471 &additional_log('exec', undef, $cmd);
5472 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5476 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5478 Runs some command, waiting at most the given number of seconds for it to
5479 complete, and returns the output. The maxlines parameter sets the number
5480 of lines of output to capture. The safe parameter should be set to 1 if the
5481 command is safe for read-only mode users to run.
5484 sub backquote_with_timeout
5486 my $realcmd = &translate_command($_[0]);
5487 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5488 if ($gconfig{'debug_what_cmd'});
5490 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5495 my $elapsed = time() - $start;
5496 last if ($elapsed > $_[1]);
5498 vec($rmask, fileno(OUT), 1) = 1;
5499 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5500 last if (!$sel || $sel < 0);
5502 last if (!defined($line));
5505 if ($_[3] && $linecount >= $_[3]) {
5510 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5514 return wantarray ? ($out, $timed_out) : $out;
5517 =head2 backquote_command(command, safe?)
5519 Executes a command and returns the output (like `command`), subject to
5520 command translation. The safe parameter should be set to 1 if the command
5521 is safe for read-only mode users to run.
5524 sub backquote_command
5526 if (&is_readonly_mode() && !$_[1]) {
5527 print STDERR "Vetoing command $_[0]\n";
5531 my $realcmd = &translate_command($_[0]);
5532 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5536 =head2 kill_logged(signal, pid, ...)
5538 Like Perl's built-in kill function, but also logs the fact that some process
5539 was killed. On Windows, falls back to calling process.exe to terminate a
5545 return scalar(@_)-1 if (&is_readonly_mode());
5546 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5547 if ($gconfig{'debug_what_procs'});
5548 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5549 if ($gconfig{'os_type'} eq 'windows') {
5550 # Emulate some kills with process.exe
5551 my $arg = $_[0] eq "KILL" ? "-k" :
5552 $_[0] eq "TERM" ? "-q" :
5553 $_[0] eq "STOP" ? "-s" :
5554 $_[0] eq "CONT" ? "-r" : undef;
5556 foreach my $p (@_[1..@_-1]) {
5558 $ok ||= kill($_[0], $p);
5561 &execute_command("process $arg $p");
5573 =head2 rename_logged(old, new)
5575 Re-names a file and logs the rename. If the old and new files are on different
5576 filesystems, calls mv or the Windows rename function to do the job.
5581 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5582 return &rename_file($_[0], $_[1]);
5585 =head2 rename_file(old, new)
5587 Renames a file or directory. If the old and new files are on different
5588 filesystems, calls mv or the Windows rename function to do the job.
5593 if (&is_readonly_mode()) {
5594 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5597 my $src = &translate_filename($_[0]);
5598 my $dst = &translate_filename($_[1]);
5599 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5600 if ($gconfig{'debug_what_ops'});
5601 my $ok = rename($src, $dst);
5602 if (!$ok && $! !~ /permission/i) {
5603 # Try the mv command, in case this is a cross-filesystem rename
5604 if ($gconfig{'os_type'} eq 'windows') {
5605 # Need to use rename
5606 my $out = &backquote_command("rename ".quotemeta($_[0]).
5607 " ".quotemeta($_[1])." 2>&1");
5609 $! = $out if (!$ok);
5613 my $out = &backquote_command("mv ".quotemeta($_[0]).
5614 " ".quotemeta($_[1])." 2>&1");
5616 $! = $out if (!$ok);
5622 =head2 symlink_logged(src, dest)
5624 Create a symlink, and logs it. Effectively does the same thing as the Perl
5631 my $rv = &symlink_file($_[0], $_[1]);
5632 &unlock_file($_[1]);
5636 =head2 symlink_file(src, dest)
5638 Creates a soft link, unless in read-only mode. Effectively does the same thing
5639 as the Perl symlink function.
5644 if (&is_readonly_mode()) {
5645 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5648 my $src = &translate_filename($_[0]);
5649 my $dst = &translate_filename($_[1]);
5650 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5651 if ($gconfig{'debug_what_ops'});
5652 return symlink($src, $dst);
5655 =head2 link_file(src, dest)
5657 Creates a hard link, unless in read-only mode. The existing new link file
5658 will be deleted if necessary. Effectively the same as Perl's link function.
5663 if (&is_readonly_mode()) {
5664 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5667 my $src = &translate_filename($_[0]);
5668 my $dst = &translate_filename($_[1]);
5669 &webmin_debug_log('LINK', "src=$src dst=$dst")
5670 if ($gconfig{'debug_what_ops'});
5671 unlink($dst); # make sure link works
5672 return link($src, $dst);
5675 =head2 make_dir(dir, perms, recursive)
5677 Creates a directory and sets permissions on it, unless in read-only mode.
5678 The perms parameter sets the octal permissions to apply, which unlike Perl's
5679 mkdir will really get set. The recursive flag can be set to 1 to have the
5680 function create parent directories too.
5685 my ($dir, $perms, $recur) = @_;
5686 if (&is_readonly_mode()) {
5687 print STDERR "Vetoing directory $dir\n";
5690 $dir = &translate_filename($dir);
5691 my $exists = -d $dir ? 1 : 0;
5692 return 1 if ($exists && $recur); # already exists
5693 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5694 my $rv = mkdir($dir, $perms);
5695 if (!$rv && $recur) {
5696 # Failed .. try mkdir -p
5697 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5698 my $ex = &execute_command("mkdir $param "."e_path($dir));
5704 chmod($perms, $dir);
5709 =head2 set_ownership_permissions(user, group, perms, file, ...)
5711 Sets the user, group owner and permissions on some files. The parameters are :
5713 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5715 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5717 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5719 =item file - One or more files or directories to modify.
5722 sub set_ownership_permissions
5724 my ($user, $group, $perms, @files) = @_;
5725 if (&is_readonly_mode()) {
5726 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5729 @files = map { &translate_filename($_) } @files;
5730 if ($gconfig{'debug_what_ops'}) {
5731 foreach my $f (@files) {
5732 &webmin_debug_log('PERMS',
5733 "file=$f user=$user group=$group perms=$perms");
5737 if (defined($user)) {
5738 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5740 if (defined($group)) {
5741 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5744 my @uinfo = getpwuid($uid);
5747 $rv = chown($uid, $gid, @files);
5749 if ($rv && defined($perms)) {
5750 $rv = chmod($perms, @files);
5755 =head2 unlink_logged(file, ...)
5757 Like Perl's unlink function, but locks the files beforehand and un-locks them
5758 after so that the deletion is logged by Webmin.
5764 foreach my $f (@_) {
5765 if (!&test_lock($f)) {
5770 my @rv = &unlink_file(@_);
5771 foreach my $f (@_) {
5776 return wantarray ? @rv : $rv[0];
5779 =head2 unlink_file(file, ...)
5781 Deletes some files or directories. Like Perl's unlink function, but also
5782 recursively deletes directories with the rm command if needed.
5787 return 1 if (&is_readonly_mode());
5790 foreach my $f (@_) {
5791 &unflush_file_lines($f);
5792 my $realf = &translate_filename($f);
5793 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5795 if (!rmdir($realf)) {
5797 if ($gconfig{'os_type'} eq 'windows') {
5798 # Call del and rmdir commands
5801 my $out = `del /q "$qm" 2>&1`;
5803 $out = `rmdir "$qm" 2>&1`;
5808 my $qm = quotemeta($realf);
5809 $out = `rm -rf $qm 2>&1`;
5818 if (!unlink($realf)) {
5824 return wantarray ? ($rv, $err) : $rv;
5827 =head2 copy_source_dest(source, dest)
5829 Copy some file or directory to a new location. Returns 1 on success, or 0
5830 on failure - also sets $! on failure. If the source is a directory, uses
5831 piped tar commands to copy a whole directory structure including permissions
5835 sub copy_source_dest
5837 return (1, undef) if (&is_readonly_mode());
5838 my ($src, $dst) = @_;
5841 &webmin_debug_log('COPY', "src=$src dst=$dst")
5842 if ($gconfig{'debug_what_ops'});
5843 if ($gconfig{'os_type'} eq 'windows') {
5844 # No tar or cp on windows, so need to use copy command
5848 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5851 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5859 # A directory .. need to copy with tar command
5860 my @st = stat($src);
5863 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5864 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5871 # Can just copy with cp
5872 my $out = &backquote_logged("cp -p ".quotemeta($src).
5873 " ".quotemeta($dst)." 2>&1");
5879 return wantarray ? ($ok, $err) : $ok;
5882 =head2 remote_session_name(host|&server)
5884 Generates a session ID for some server. For this server, this will always
5885 be an empty string. For a server object it will include the hostname and
5886 port and PID. For a server name, it will include the hostname and PID. For
5890 sub remote_session_name
5892 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5893 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5894 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5895 ref($_[0]) ? "" : "$_[0].$$";
5898 =head2 remote_foreign_require(server, module, file)
5900 Connects to rpc.cgi on a remote webmin server and have it open a session
5901 to a process that will actually do the require and run functions. This is the
5902 equivalent for foreign_require, but for a remote Webmin system. The server
5903 parameter can either be a hostname of a system registered in the Webmin
5904 Servers Index module, or a hash reference for a system from that module.
5907 sub remote_foreign_require
5909 my $call = { 'action' => 'require',
5912 my $sn = &remote_session_name($_[0]);
5913 if ($remote_session{$sn}) {
5914 $call->{'session'} = $remote_session{$sn};
5917 $call->{'newsession'} = 1;
5919 my $rv = &remote_rpc_call($_[0], $call);
5920 if ($rv->{'session'}) {
5921 $remote_session{$sn} = $rv->{'session'};
5922 $remote_session_server{$sn} = $_[0];
5926 =head2 remote_foreign_call(server, module, function, [arg]*)
5928 Call a function on a remote server. Must have been setup first with
5929 remote_foreign_require for the same server and module. Equivalent to
5930 foreign_call, but with the extra server parameter to specify the remote
5934 sub remote_foreign_call
5936 return undef if (&is_readonly_mode());
5937 my $sn = &remote_session_name($_[0]);
5938 return &remote_rpc_call($_[0], { 'action' => 'call',
5941 'session' => $remote_session{$sn},
5942 'args' => [ @_[3 .. $#_] ] } );
5945 =head2 remote_foreign_check(server, module, [api-only])
5947 Checks if some module is installed and supported on a remote server. Equivilant
5948 to foreign_check, but for the remote Webmin system specified by the server
5952 sub remote_foreign_check
5954 return &remote_rpc_call($_[0], { 'action' => 'check',
5959 =head2 remote_foreign_config(server, module)
5961 Gets the configuration for some module from a remote server, as a hash.
5962 Equivalent to foreign_config, but for a remote system.
5965 sub remote_foreign_config
5967 return &remote_rpc_call($_[0], { 'action' => 'config',
5968 'module' => $_[1] });
5971 =head2 remote_eval(server, module, code)
5973 Evaluates some perl code in the context of a module on a remote webmin server.
5974 The server parameter must be the hostname of a remote system, module must
5975 be a module directory name, and code a string of Perl code to run. This can
5976 only be called after remote_foreign_require for the same server and module.
5981 return undef if (&is_readonly_mode());
5982 my $sn = &remote_session_name($_[0]);
5983 return &remote_rpc_call($_[0], { 'action' => 'eval',
5986 'session' => $remote_session{$sn} });
5989 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5991 Transfers some local file to another server via Webmin's RPC protocol, and
5992 returns the resulting remote filename. If the remotefile parameter is given,
5993 that is the destination filename which will be used. Otherwise a randomly
5994 selected temporary filename will be used, and returned by the function.
5999 return undef if (&is_readonly_mode());
6001 my $sn = &remote_session_name($_[0]);
6002 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6003 # Copy data over TCP connection
6004 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
6006 'name' => $_[3] } );
6008 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6009 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
6010 return &$main::remote_error_handler("Failed to transfer file : $error")
6013 while(read(FILE, $got, 1024) > 0) {
6017 shutdown(TWRITE, 1);
6019 if ($error && $error !~ /^OK/) {
6020 # Got back an error!
6021 return &$main::remote_error_handler("Failed to transfer file : $error");
6027 # Just pass file contents as parameters
6029 while(read(FILE, $got, 1024) > 0) {
6033 return &remote_rpc_call($_[0], { 'action' => 'write',
6036 'session' => $remote_session{$sn} });
6040 =head2 remote_read(server, localfile, remotefile)
6042 Transfers a file from a remote server to this system, using Webmin's RPC
6043 protocol. The server parameter must be the hostname of a system registered
6044 in the Webmin Servers Index module, localfile is the destination path on this
6045 system, and remotefile is the file to fetch from the remote server.
6050 my $sn = &remote_session_name($_[0]);
6051 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6052 # Copy data over TCP connection
6053 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
6054 'file' => $_[2] } );
6056 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
6059 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6060 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
6061 return &$main::remote_error_handler("Failed to transfer file : $error")
6064 open(FILE, ">$_[1]");
6065 while(read(TREAD, $got, 1024) > 0) {
6072 # Just get data as return value
6073 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
6075 'session' => $remote_session{$sn} });
6076 open(FILE, ">$_[1]");
6082 =head2 remote_finished
6084 Close all remote sessions. This happens automatically after a while
6085 anyway, but this function should be called to clean things up faster.
6090 foreach my $sn (keys %remote_session) {
6091 my $server = $remote_session_server{$sn};
6092 &remote_rpc_call($server, { 'action' => 'quit',
6093 'session' => $remote_session{$sn} } );
6094 delete($remote_session{$sn});
6095 delete($remote_session_server{$sn});
6097 foreach my $fh (keys %fast_fh_cache) {
6099 delete($fast_fh_cache{$fh});
6103 =head2 remote_error_setup(&function)
6105 Sets a function to be called instead of &error when a remote RPC operation
6106 fails. Useful if you want to have more control over your remote operations.
6109 sub remote_error_setup
6111 $main::remote_error_handler = $_[0] || \&error;
6114 =head2 remote_rpc_call(server, &structure)
6116 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
6117 and then reads back a reply structure. This is mainly for internal use only,
6118 and is called by the other remote_* functions.
6124 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
6126 # Server structure was given
6128 $serv->{'user'} || $serv->{'id'} == 0 ||
6129 return &$main::remote_error_handler(
6130 "No Webmin login set for server");
6133 # lookup the server in the webmin servers module if needed
6134 if (!%main::remote_servers_cache) {
6135 &foreign_require("servers", "servers-lib.pl");
6136 foreach $s (&foreign_call("servers", "list_servers")) {
6137 $main::remote_servers_cache{$s->{'host'}} = $s;
6138 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
6141 $serv = $main::remote_servers_cache{$_[0]};
6142 $serv || return &$main::remote_error_handler(
6143 "No Webmin Servers entry for $_[0]");
6144 $serv->{'user'} || return &$main::remote_error_handler(
6145 "No login set for server $_[0]");
6147 my $ip = $serv->{'ip'} || $serv->{'host'};
6149 # Work out the username and password
6151 if ($serv->{'sameuser'}) {
6152 $user = $remote_user;
6153 defined($main::remote_pass) || return &$main::remote_error_handler(
6154 "Password for this server is not available");
6155 $pass = $main::remote_pass;
6158 $user = $serv->{'user'};
6159 $pass = $serv->{'pass'};
6162 if ($serv->{'fast'} || !$sn) {
6163 # Make TCP connection call to fastrpc.cgi
6164 if (!$fast_fh_cache{$sn} && $sn) {
6165 # Need to open the connection
6166 my $con = &make_http_connection(
6167 $ip, $serv->{'port'}, $serv->{'ssl'},
6168 "POST", "/fastrpc.cgi");
6169 return &$main::remote_error_handler(
6170 "Failed to connect to $serv->{'host'} : $con")
6172 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6173 &write_http_connection($con, "User-agent: Webmin\r\n");
6174 my $auth = &encode_base64("$user:$pass");
6176 &write_http_connection($con, "Authorization: basic $auth\r\n");
6177 &write_http_connection($con, "Content-length: ",
6178 length($tostr),"\r\n");
6179 &write_http_connection($con, "\r\n");
6180 &write_http_connection($con, $tostr);
6182 # read back the response
6183 my $line = &read_http_connection($con);
6184 $line =~ tr/\r\n//d;
6185 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6186 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6188 $line =~ /^HTTP\/1\..\s+200\s+/ ||
6189 return &$main::remote_error_handler("HTTP error : $line");
6191 $line = &read_http_connection($con);
6192 $line =~ tr/\r\n//d;
6194 $line = &read_http_connection($con);
6195 if ($line =~ /^0\s+(.*)/) {
6196 return &$main::remote_error_handler("RPC error : $1");
6198 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
6199 $line =~ /^1\s+(\S+)\s+(\S+)/) {
6200 # Started ok .. connect and save SID
6201 &close_http_connection($con);
6202 my ($port, $sid, $version, $error) = ($1, $2, $3);
6203 &open_socket($ip, $port, $sid, \$error);
6204 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
6206 $fast_fh_cache{$sn} = $sid;
6207 $remote_server_version{$sn} = $version;
6210 while($stuff = &read_http_connection($con)) {
6213 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
6216 elsif (!$fast_fh_cache{$sn}) {
6217 # Open the connection by running fastrpc.cgi locally
6218 pipe(RPCOUTr, RPCOUTw);
6222 open(STDOUT, ">&RPCOUTw");
6226 $ENV{'REQUEST_METHOD'} = 'GET';
6227 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6228 $ENV{'SERVER_ROOT'} ||= $root_directory;
6230 if ($base_remote_user ne 'root' &&
6231 $base_remote_user ne 'admin') {
6232 # Need to fake up a login for the CGI!
6233 &read_acl(undef, \%acl, [ 'root' ]);
6234 $ENV{'BASE_REMOTE_USER'} =
6235 $ENV{'REMOTE_USER'} =
6236 $acl{'root'} ? 'root' : 'admin';
6238 delete($ENV{'FOREIGN_MODULE_NAME'});
6239 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6240 chdir($root_directory);
6241 if (!exec("$root_directory/fastrpc.cgi")) {
6242 print "exec failed : $!\n";
6249 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6253 if ($line =~ /^0\s+(.*)/) {
6254 return &$main::remote_error_handler("RPC error : $2");
6256 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6257 # Started ok .. connect and save SID
6259 my ($port, $sid, $error) = ($1, $2, undef);
6260 &open_socket("localhost", $port, $sid, \$error);
6261 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6262 $fast_fh_cache{$sn} = $sid;
6269 &error("Bad response from fastrpc.cgi : $line");
6272 # Got a connection .. send off the request
6273 my $fh = $fast_fh_cache{$sn};
6274 my $tostr = &serialise_variable($_[1]);
6275 print $fh length($tostr)," $fh\n";
6279 return &$main::remote_error_handler(
6280 "Error reading response length from fastrpc.cgi : $!")
6282 my $rlen = int($rstr);
6283 my ($fromstr, $got);
6284 while(length($fromstr) < $rlen) {
6285 return &$main::remote_error_handler(
6286 "Failed to read from fastrpc.cgi : $!")
6287 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6290 my $from = &unserialise_variable($fromstr);
6292 # No response at all
6293 return &$main::remote_error_handler("Remote Webmin error");
6295 elsif (ref($from) ne 'HASH') {
6297 return &$main::remote_error_handler(
6298 "Invalid remote Webmin response : $from");
6300 elsif (!$from->{'status'}) {
6302 $from->{'rv'} =~ s/\s+at\s+(\S+)\s+line\s+(\d+)(,\s+<\S+>\s+line\s+(\d+))?//;
6303 return &$main::remote_error_handler($from->{'rv'});
6305 if (defined($from->{'arv'})) {
6306 return @{$from->{'arv'}};
6309 return $from->{'rv'};
6313 # Call rpc.cgi on remote server
6314 my $tostr = &serialise_variable($_[1]);
6316 my $con = &make_http_connection($ip, $serv->{'port'},
6317 $serv->{'ssl'}, "POST", "/rpc.cgi");
6318 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6320 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6321 &write_http_connection($con, "User-agent: Webmin\r\n");
6322 my $auth = &encode_base64("$user:$pass");
6324 &write_http_connection($con, "Authorization: basic $auth\r\n");
6325 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6326 &write_http_connection($con, "\r\n");
6327 &write_http_connection($con, $tostr);
6329 # read back the response
6330 my $line = &read_http_connection($con);
6331 $line =~ tr/\r\n//d;
6332 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6333 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6335 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6337 $line = &read_http_connection($con);
6338 $line =~ tr/\r\n//d;
6341 while($line = &read_http_connection($con)) {
6345 my $from = &unserialise_variable($fromstr);
6346 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6347 if (defined($from->{'arv'})) {
6348 return @{$from->{'arv'}};
6351 return $from->{'rv'};
6356 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6358 Executes some function in parallel on multiple servers at once. Fills in
6359 the returns and errors arrays respectively. If the module and library
6360 parameters are given, that module is remotely required on the server first,
6361 to check if it is connectable. The parameters are :
6363 =item servers - A list of Webmin system hash references.
6365 =item parallel - Number of parallel operations to perform.
6367 =item function - Reference to function to call for each system.
6369 =item args - Additional parameters to the function.
6371 =item returns - Array ref to place return values into, in same order as servers.
6373 =item errors - Array ref to place error messages into.
6375 =item module - Optional module to require on the remote system first.
6377 =item library - Optional library to require in the module.
6380 sub remote_multi_callback
6382 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6383 &remote_error_setup(\&remote_multi_callback_error);
6385 # Call the functions
6387 foreach my $g (@$servs) {
6393 $remote_multi_callback_err = undef;
6395 # Require the remote lib
6396 &remote_foreign_require($g->{'host'}, $mod, $lib);
6397 if ($remote_multi_callback_err) {
6398 # Failed .. return error
6399 print $wh &serialise_variable(
6400 [ undef, $remote_multi_callback_err ]);
6406 my $a = ref($args) ? $args->[$p] : $args;
6407 my $rv = &$func($g, $a);
6410 print $wh &serialise_variable(
6411 [ $rv, $remote_multi_callback_err ]);
6419 # Read back the results
6421 foreach my $g (@$servs) {
6425 $errs->[$p] = "Failed to read response from $g->{'host'}";
6428 my $rv = &unserialise_variable($line);
6430 $rets->[$p] = $rv->[0];
6431 $errs->[$p] = $rv->[1];
6436 &remote_error_setup(undef);
6439 sub remote_multi_callback_error
6441 $remote_multi_callback_err = $_[0];
6444 =head2 serialise_variable(variable)
6446 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6447 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6448 called on each member to serialize the entire object.
6451 sub serialise_variable
6453 if (!defined($_[0])) {
6459 $rv = &urlize($_[0]);
6461 elsif ($r eq 'SCALAR') {
6462 $rv = &urlize(${$_[0]});
6464 elsif ($r eq 'ARRAY') {
6465 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6467 elsif ($r eq 'HASH') {
6468 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6469 &urlize(&serialise_variable($_[0]->{$_})) }
6472 elsif ($r eq 'REF') {
6473 $rv = &serialise_variable(${$_[0]});
6475 elsif ($r eq 'CODE') {
6480 # An object - treat as a hash
6481 $r = "OBJECT ".&urlize($r);
6482 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6483 &urlize(&serialise_variable($_[0]->{$_})) }
6486 return ($r ? $r : 'VAL').",".$rv;
6489 =head2 unserialise_variable(string)
6491 Converts a string created by serialise_variable() back into the original
6492 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6493 object, the same class is used on this system, if available.
6496 sub unserialise_variable
6498 my @v = split(/,/, $_[0]);
6500 if ($v[0] eq 'VAL') {
6501 @v = split(/,/, $_[0], -1);
6502 $rv = &un_urlize($v[1]);
6504 elsif ($v[0] eq 'SCALAR') {
6505 local $r = &un_urlize($v[1]);
6508 elsif ($v[0] eq 'ARRAY') {
6510 for(my $i=1; $i<@v; $i++) {
6511 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6514 elsif ($v[0] eq 'HASH') {
6516 for(my $i=1; $i<@v; $i+=2) {
6517 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6518 &unserialise_variable(&un_urlize($v[$i+1]));
6521 elsif ($v[0] eq 'REF') {
6522 local $r = &unserialise_variable($v[1]);
6525 elsif ($v[0] eq 'UNDEF') {
6528 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6529 # An object hash that we have to re-bless
6532 for(my $i=1; $i<@v; $i+=2) {
6533 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6534 &unserialise_variable(&un_urlize($v[$i+1]));
6542 =head2 other_groups(user)
6544 Returns a list of secondary groups a user is a member of, as a list of
6553 while(my @g = getgrent()) {
6554 my @m = split(/\s+/, $g[3]);
6555 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6557 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6561 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6563 Returns HTML for a button that pops up a data chooser window. The parameters
6566 =item dayfield - Name of the text field to place the day of the month into.
6568 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6570 =item yearfield - Name of the text field to place the year into.
6573 sub date_chooser_button
6575 return &theme_date_chooser_button(@_)
6576 if (defined(&theme_date_chooser_button));
6577 my ($w, $h) = (250, 225);
6578 if ($gconfig{'db_sizedate'}) {
6579 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6581 return "<input type=button onClick='window.dfield = form.$_[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";
6584 =head2 help_file(module, file)
6586 Returns the path to a module's help file of some name, typically under the
6587 help directory with a .html extension.
6592 my $mdir = &module_root_directory($_[0]);
6593 my $dir = "$mdir/help";
6594 foreach my $o (@lang_order_list) {
6595 my $lang = "$dir/$_[1].$o.html";
6596 return $lang if (-r $lang);
6598 return "$dir/$_[1].html";
6603 Seeds the random number generator, if not already done in this script. On Linux
6604 this makes use of the current time, process ID and a read from /dev/urandom.
6605 On other systems, only the current time and process ID are used.
6610 if (!$main::done_seed_random) {
6611 if (open(RANDOM, "/dev/urandom")) {
6613 read(RANDOM, $buf, 4);
6615 srand(time() ^ $$ ^ $buf);
6620 $main::done_seed_random = 1;
6624 =head2 disk_usage_kb(directory)
6626 Returns the number of kB used by some directory and all subdirs. Implemented
6627 by calling the C<du -k> command.
6632 my $dir = &translate_filename($_[0]);
6634 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6636 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6638 return $out =~ /^([0-9]+)/ ? $1 : "???";
6641 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6643 Returns the number of bytes taken up by all files in some directory and all
6644 sub-directories, by summing up their lengths. The disk_usage_kb is more
6645 reflective of reality, as the filesystem typically pads file sizes to 1k or
6649 sub recursive_disk_usage
6651 my $dir = &translate_filename($_[0]);
6658 my @st = stat($dir);
6664 my @files = readdir(DIR);
6666 foreach my $f (@files) {
6667 next if ($f eq "." || $f eq "..");
6668 next if ($skip && $f =~ /$skip/);
6669 next if ($only && $f !~ /$only/);
6670 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6676 =head2 help_search_link(term, [ section, ... ] )
6678 Returns HTML for a link to the man module for searching local and online
6679 docs for various search terms. The term parameter can either be a single
6680 word like 'bind', or a space-separated list of words. This function is typically
6681 used by modules that want to refer users to additional documentation in man
6682 pages or local system doc files.
6685 sub help_search_link
6687 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6688 my $for = &urlize(shift(@_));
6689 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6690 join("&", map { "section=$_" } @_)."&".
6691 "for=$for&exact=1&check=".&get_module_name()."'>".
6692 $text{'helpsearch'}."</a>\n";
6699 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6701 Opens a connection to some HTTP server, maybe through a proxy, and returns
6702 a handle object. The handle can then be used to send additional headers
6703 and read back a response. If anything goes wrong, returns an error string.
6704 The parameters are :
6706 =item host - Hostname or IP address of the webserver to connect to.
6708 =item port - HTTP port number to connect to.
6710 =item ssl - Set to 1 to connect in SSL mode.
6712 =item method - HTTP method, like GET or POST.
6714 =item page - Page to request on the webserver, like /foo/index.html
6716 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6719 sub make_http_connection
6721 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6724 foreach my $h (@$headers) {
6725 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6729 if (&is_readonly_mode()) {
6730 return "HTTP connections not allowed in readonly mode";
6732 my $rv = { 'fh' => time().$$ };
6735 eval "use Net::SSLeay";
6736 $@ && return $text{'link_essl'};
6737 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6738 eval "Net::SSLeay::load_error_strings()";
6739 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6740 return "Failed to create SSL context";
6741 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6742 return "Failed to create SSL connection";
6744 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6745 !&no_proxy($host)) {
6748 &open_socket($1, $2, $rv->{'fh'}, \$error);
6751 my $fh = $rv->{'fh'};
6752 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6753 if ($gconfig{'proxy_user'}) {
6754 my $auth = &encode_base64(
6755 "$gconfig{'proxy_user'}:".
6756 "$gconfig{'proxy_pass'}");
6757 $auth =~ tr/\r\n//d;
6758 print $fh "Proxy-Authorization: Basic $auth\r\n";
6762 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6763 return "Proxy error : $3" if ($2 != 200);
6766 return "Proxy error : $line";
6771 elsif (!$gconfig{'proxy_fallback'}) {
6772 # Connection to proxy failed - give up
6779 &open_socket($host, $port, $rv->{'fh'}, \$error);
6780 return $error if ($error);
6782 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6783 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6784 return "SSL connect() failed";
6785 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6786 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6789 # Plain HTTP request
6791 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6792 !&no_proxy($host)) {
6795 &open_socket($1, $2, $rv->{'fh'}, \$error);
6799 my $fh = $rv->{'fh'};
6800 my $rtxt = $method." ".
6801 "http://$host:$port$page HTTP/1.0\r\n";
6802 if ($gconfig{'proxy_user'}) {
6803 my $auth = &encode_base64(
6804 "$gconfig{'proxy_user'}:".
6805 "$gconfig{'proxy_pass'}");
6806 $auth =~ tr/\r\n//d;
6807 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6812 elsif (!$gconfig{'proxy_fallback'}) {
6817 # Connecting directly
6819 &open_socket($host, $port, $rv->{'fh'}, \$error);
6820 return $error if ($error);
6821 my $fh = $rv->{'fh'};
6822 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6829 =head2 read_http_connection(&handle, [bytes])
6831 Reads either one line or up to the specified number of bytes from the handle,
6832 originally supplied by make_http_connection.
6835 sub read_http_connection
6839 if ($h->{'ssl_con'}) {
6842 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6843 # need to read more..
6844 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6846 $rv = $h->{'buffer'};
6847 delete($h->{'buffer'});
6850 $h->{'buffer'} .= $more;
6852 $rv = substr($h->{'buffer'}, 0, $idx+1);
6853 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6856 if (length($h->{'buffer'})) {
6857 $rv = $h->{'buffer'};
6858 delete($h->{'buffer'});
6861 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6867 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6870 my $fh = $h->{'fh'};
6874 $rv = undef if ($rv eq "");
6878 =head2 write_http_connection(&handle, [data+])
6880 Writes the given data to the given HTTP connection handle.
6883 sub write_http_connection
6886 my $fh = $h->{'fh'};
6888 if ($h->{'ssl_ctx'}) {
6889 foreach my $s (@_) {
6890 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6891 $allok = 0 if (!$ok);
6895 my $ok = (print $fh @_);
6896 $allok = 0 if (!$ok);
6901 =head2 close_http_connection(&handle)
6903 Closes a connection to an HTTP server, identified by the given handle.
6906 sub close_http_connection
6912 =head2 clean_environment
6914 Deletes any environment variables inherited from miniserv so that they
6915 won't be passed to programs started by webmin. This is useful when calling
6916 programs that check for CGI-related environment variables and modify their
6917 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6920 sub clean_environment
6922 %UNCLEAN_ENV = %ENV;
6923 foreach my $k (keys %ENV) {
6924 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6928 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6929 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6930 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6931 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6932 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6933 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6934 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6935 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6941 =head2 reset_environment
6943 Puts the environment back how it was before clean_environment was callled.
6946 sub reset_environment
6949 foreach my $k (keys %UNCLEAN_ENV) {
6950 $ENV{$k} = $UNCLEAN_ENV{$k};
6952 undef(%UNCLEAN_ENV);
6956 =head2 progress_callback
6958 Never called directly, but useful for passing to &http_download to print
6959 out progress of an HTTP request.
6962 sub progress_callback
6964 if (defined(&theme_progress_callback)) {
6965 # Call the theme override
6966 return &theme_progress_callback(@_);
6970 print $progress_callback_prefix;
6972 $progress_size = $_[1];
6973 $progress_step = int($_[1] / 10);
6974 print &text('progress_size2', $progress_callback_url,
6975 &nice_size($progress_size)),"<br>\n";
6978 $progress_size = undef;
6979 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6981 $last_progress_time = $last_progress_size = undef;
6983 elsif ($_[0] == 3) {
6985 my $sp = $progress_callback_prefix.(" " x 5);
6986 if ($progress_size) {
6987 # And we have a size to compare against
6988 my $st = int(($_[1] * 10) / $progress_size);
6989 my $time_now = time();
6990 if ($st != $progress_step ||
6991 $time_now - $last_progress_time > 60) {
6992 # Show progress every 10% or 60 seconds
6993 print $sp,&text('progress_datan', &nice_size($_[1]),
6994 int($_[1]*100/$progress_size)),"<br>\n";
6995 $last_progress_time = $time_now;
6997 $progress_step = $st;
7000 # No total size .. so only show in 100k jumps
7001 if ($_[1] > $last_progress_size+100*1024) {
7002 print $sp,&text('progress_data2n',
7003 &nice_size($_[1])),"<br>\n";
7004 $last_progress_size = $_[1];
7008 elsif ($_[0] == 4) {
7009 # All done downloading
7010 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
7012 elsif ($_[0] == 5) {
7013 # Got new location after redirect
7014 $progress_callback_url = $_[1];
7016 elsif ($_[0] == 6) {
7018 $progress_callback_url = $_[1];
7019 print &text('progress_incache', $progress_callback_url),"<br>\n";
7023 =head2 switch_to_remote_user
7025 Changes the user and group of the current process to that of the unix user
7026 with the same name as the current webmin login, or fails if there is none.
7027 This should be called by Usermin module scripts that only need to run with
7028 limited permissions.
7031 sub switch_to_remote_user
7033 @remote_user_info = $remote_user ? getpwnam($remote_user) :
7035 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
7036 &create_missing_homedir(\@remote_user_info);
7038 &switch_to_unix_user(\@remote_user_info);
7039 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
7040 $ENV{'HOME'} = $remote_user_info[7];
7042 # Export global variables to caller
7043 if ($main::export_to_caller) {
7044 my ($callpkg) = caller();
7045 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
7049 =head2 switch_to_unix_user(&user-details)
7051 Switches the current process to the UID and group ID from the given list
7052 of user details, which must be in the format returned by getpwnam.
7055 sub switch_to_unix_user
7058 if (!defined($uinfo->[0])) {
7059 # No username given, so just use given GID
7060 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
7063 # Use all groups from user
7064 ($(, $)) = ( $uinfo->[3],
7065 "$uinfo->[3] ".join(" ", $uinfo->[3],
7066 &other_groups($uinfo->[0])) );
7069 POSIX::setuid($uinfo->[2]);
7071 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
7072 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
7076 =head2 eval_as_unix_user(username, &code)
7078 Runs some code fragment with the effective UID and GID switch to that
7079 of the given Unix user, so that file IO takes place with his permissions.
7083 sub eval_as_unix_user
7085 my ($user, $code) = @_;
7086 my @uinfo = getpwnam($user);
7087 if (!scalar(@uinfo)) {
7088 &error("eval_as_unix_user called with invalid user $user");
7090 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
7094 local $main::error_must_die = 1;
7101 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
7104 return wantarray ? @rv : $rv[0];
7107 =head2 create_user_config_dirs
7109 Creates per-user config directories and sets $user_config_directory and
7110 $user_module_config_directory to them. Also reads per-user module configs
7111 into %userconfig. This should be called by Usermin module scripts that need
7112 to store per-user preferences or other settings.
7115 sub create_user_config_dirs
7117 return if (!$gconfig{'userconfig'});
7118 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
7119 return if (!@uinfo || !$uinfo[7]);
7120 &create_missing_homedir(\@uinfo);
7121 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
7122 if (!-d $user_config_directory) {
7123 mkdir($user_config_directory, 0700) ||
7124 &error("Failed to create $user_config_directory : $!");
7125 if ($< == 0 && $uinfo[2]) {
7126 chown($uinfo[2], $uinfo[3], $user_config_directory);
7129 if (&get_module_name()) {
7130 $user_module_config_directory = $user_config_directory."/".
7132 if (!-d $user_module_config_directory) {
7133 mkdir($user_module_config_directory, 0700) ||
7134 &error("Failed to create $user_module_config_directory : $!");
7135 if ($< == 0 && $uinfo[2]) {
7136 chown($uinfo[2], $uinfo[3], $user_config_directory);
7140 &read_file_cached("$module_root_directory/defaultuconfig",
7142 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
7143 &read_file_cached("$user_module_config_directory/config",
7147 # Export global variables to caller
7148 if ($main::export_to_caller) {
7149 my ($callpkg) = caller();
7150 foreach my $v ('$user_config_directory',
7151 '$user_module_config_directory', '%userconfig') {
7152 my ($vt, $vn) = split('', $v, 2);
7153 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
7158 =head2 create_missing_homedir(&uinfo)
7160 If auto homedir creation is enabled, create one for this user if needed.
7161 For internal use only.
7164 sub create_missing_homedir
7167 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
7168 # Use has no home dir .. make one
7169 system("mkdir -p ".quotemeta($uinfo->[7]));
7170 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
7171 if ($gconfig{'create_homedir_perms'} ne '') {
7172 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
7177 =head2 filter_javascript(text)
7179 Disables all javascript <script>, onClick= and so on tags in the given HTML,
7180 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
7183 sub filter_javascript
7186 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
7187 $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;
7188 $rv =~ s/(javascript:)/x$1/gi;
7189 $rv =~ s/(vbscript:)/x$1/gi;
7193 =head2 resolve_links(path)
7195 Given a path that may contain symbolic links, returns the real path.
7201 $path =~ s/\/+/\//g;
7202 $path =~ s/\/$// if ($path ne "/");
7203 my @p = split(/\/+/, $path);
7205 for(my $i=0; $i<@p; $i++) {
7206 my $sofar = "/".join("/", @p[0..$i]);
7207 my $lnk = readlink($sofar);
7208 if ($lnk eq $sofar) {
7209 # Link to itself! Cannot do anything more really ..
7212 elsif ($lnk =~ /^\//) {
7213 # Link is absolute..
7214 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
7218 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
7224 =head2 simplify_path(path, bogus)
7226 Given a path, maybe containing elements ".." and "." , convert it to a
7227 clean, absolute form. Returns undef if this is not possible.
7235 my @bits = split(/\/+/, $dir);
7238 foreach my $b (@bits) {
7242 elsif ($b eq "..") {
7244 if (scalar(@fixedbits) == 0) {
7245 # Cannot! Already at root!
7252 push(@fixedbits, $b);
7255 return "/".join('/', @fixedbits);
7258 =head2 same_file(file1, file2)
7260 Returns 1 if two files are actually the same
7265 return 1 if ($_[0] eq $_[1]);
7266 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7267 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7268 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7269 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7270 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7271 return 0 if (!@stat1 || !@stat2);
7272 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7275 =head2 flush_webmin_caches
7277 Clears all in-memory and on-disk caches used by Webmin.
7280 sub flush_webmin_caches
7282 undef(%main::read_file_cache);
7283 undef(%main::acl_hash_cache);
7284 undef(%main::acl_array_cache);
7285 undef(%main::has_command_cache);
7286 undef(@main::list_languages_cache);
7287 undef($main::got_list_usermods_cache);
7288 undef(@main::list_usermods_cache);
7289 undef(%main::foreign_installed_cache);
7290 unlink("$config_directory/module.infos.cache");
7291 &get_all_module_infos();
7294 =head2 list_usermods
7296 Returns a list of additional module restrictions. For internal use in
7302 if (!$main::got_list_usermods_cache) {
7303 @main::list_usermods_cache = ( );
7305 open(USERMODS, "$config_directory/usermin.mods");
7307 if (/^([^:]+):(\+|-|):(.*)/) {
7308 push(@main::list_usermods_cache,
7309 [ $1, $2, [ split(/\s+/, $3) ] ]);
7313 $main::got_list_usermods_cache = 1;
7315 return @main::list_usermods_cache;
7318 =head2 available_usermods(&allmods, &usermods)
7320 Returns a list of modules that are available to the given user, based
7321 on usermod additional/subtractions. For internal use by Usermin only.
7324 sub available_usermods
7326 return @{$_[0]} if (!@{$_[1]});
7328 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7329 my @uinfo = @remote_user_info;
7330 @uinfo = getpwnam($remote_user) if (!@uinfo);
7331 foreach my $u (@{$_[1]}) {
7333 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7336 elsif ($u->[0] =~ /^\@(.*)$/) {
7337 # Check for group membership
7338 my @ginfo = getgrnam($1);
7339 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7340 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7342 elsif ($u->[0] =~ /^\//) {
7343 # Check users and groups in file
7345 open(USERFILE, $u->[0]);
7348 if ($_ eq $remote_user) {
7351 elsif (/^\@(.*)$/) {
7352 my @ginfo = getgrnam($1);
7354 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7355 &indexof($remote_user,
7356 split(/\s+/, $ginfo[3])) >= 0));
7363 if ($u->[1] eq "+") {
7364 map { $mods{$_}++ } @{$u->[2]};
7366 elsif ($u->[1] eq "-") {
7367 map { delete($mods{$_}) } @{$u->[2]};
7371 map { $mods{$_}++ } @{$u->[2]};
7375 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7378 =head2 get_available_module_infos(nocache)
7380 Returns a list of modules available to the current user, based on
7381 operating system support, access control and usermod restrictions. Useful
7382 in themes that need to display a list of modules the user can use.
7383 Each element of the returned array is a hash reference in the same format as
7384 returned by get_module_info.
7387 sub get_available_module_infos
7390 &read_acl(\%acl, \%uacl, [ $base_remote_user ]);
7391 my $risk = $gconfig{'risk_'.$base_remote_user};
7393 foreach my $minfo (&get_all_module_infos($_[0])) {
7394 next if (!&check_os_support($minfo));
7396 # Check module risk level
7397 next if ($risk ne 'high' && $minfo->{'risk'} &&
7398 $minfo->{'risk'} !~ /$risk/);
7402 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7403 !$acl{$base_remote_user,"*"});
7405 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7409 # Check usermod restrictions
7410 my @usermods = &list_usermods();
7411 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7412 &available_usermods(\@rv, \@usermods);
7414 # Check RBAC restrictions
7416 foreach my $m (@rv) {
7417 if (&supports_rbac($m->{'dir'}) &&
7418 &use_rbac_module_acl(undef, $m->{'dir'})) {
7419 local $rbacs = &get_rbac_module_acl($remote_user,
7427 # Module or system doesn't support RBAC
7428 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7434 if (defined(&theme_foreign_available)) {
7435 foreach my $m (@rbacrv) {
7436 if (&theme_foreign_available($m->{'dir'})) {
7445 # Check licence module vetos
7447 if ($main::licence_module) {
7448 foreach my $m (@themerv) {
7449 if (&foreign_call($main::licence_module,
7450 "check_module_licence", $m->{'dir'})) {
7462 =head2 get_visible_module_infos(nocache)
7464 Like get_available_module_infos, but excludes hidden modules from the list.
7465 Each element of the returned array is a hash reference in the same format as
7466 returned by get_module_info.
7469 sub get_visible_module_infos
7472 my $pn = &get_product_name();
7473 return grep { !$_->{'hidden'} &&
7474 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7477 =head2 get_visible_modules_categories(nocache)
7479 Returns a list of Webmin module categories, each of which is a hash ref
7480 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7481 of modules in the category, in the format returned by get_module_info.
7482 Un-used modules are automatically assigned to the 'unused' category, and
7483 those with no category are put into 'others'.
7486 sub get_visible_modules_categories
7489 my @mods = &get_visible_module_infos($nocache);
7491 if (&get_product_name() eq 'webmin') {
7492 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7493 @mods = grep { $_->{'installed'} ne '0' } @mods;
7495 my %cats = &list_categories(\@mods);
7497 foreach my $c (keys %cats) {
7498 my $cat = { 'code' => $c || 'other',
7499 'desc' => $cats{$c} };
7500 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7503 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7504 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7506 # Add un-installed modules in magic category
7507 my $cat = { 'code' => 'unused',
7508 'desc' => $text{'main_unused'},
7510 'modules' => \@unmods };
7516 =head2 is_under_directory(directory, file)
7518 Returns 1 if the given file is under the specified directory, 0 if not.
7519 Symlinks are taken into account in the file to find it's 'real' location.
7522 sub is_under_directory
7524 my ($dir, $file) = @_;
7525 return 1 if ($dir eq "/");
7526 return 0 if ($file =~ /\.\./);
7527 my $ld = &resolve_links($dir);
7529 return &is_under_directory($ld, $file);
7531 my $lp = &resolve_links($file);
7533 return &is_under_directory($dir, $lp);
7535 return 0 if (length($file) < length($dir));
7536 return 1 if ($dir eq $file);
7538 return substr($file, 0, length($dir)) eq $dir;
7541 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7543 Given an absolute URL, returns the host, port, page and ssl flag components.
7544 If a username and password are given before the hostname, return those too.
7545 Relative URLs can also be parsed, if the base information is provided.
7550 if ($_[0] =~ /^(http|https):\/\/([^\@]+\@)?\[([^\]]+)\](:(\d+))?(\/\S*)?$/ ||
7551 $_[0] =~ /^(http|https):\/\/([^\@]+\@)?([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7553 my $ssl = $1 eq 'https';
7554 my @rv = ($3, $4 ? $5 : $ssl ? 443 : 80, $6 || "/", $ssl);
7555 if ($2 =~ /^([^:]+):(\S+)\@/) {
7564 elsif ($_[0] =~ /^\/\S*$/) {
7565 # A relative to the server URL
7566 return ($_[1], $_[2], $_[0], $_[4], $_[5], $_[6]);
7569 # A relative to the directory URL
7571 $page =~ s/[^\/]+$//;
7572 return ($_[1], $_[2], $page.$_[0], $_[4], $_[5], $_[6]);
7576 =head2 check_clicks_function
7578 Returns HTML for a JavaScript function called check_clicks that returns
7579 true when first called, but false subsequently. Useful on onClick for
7580 critical buttons. Deprecated, as this method of preventing duplicate actions
7584 sub check_clicks_function
7589 function check_clicks(form)
7596 for(i=0; i<form.length; i++)
7597 form.elements[i].disabled = true;
7606 =head2 load_entities_map
7608 Returns a hash ref containing mappings between HTML entities (like ouml) and
7609 ascii values (like 246). Mainly for internal use.
7612 sub load_entities_map
7614 if (!%entities_map_cache) {
7616 open(EMAP, "$root_directory/entities_map.txt");
7618 if (/^(\d+)\s+(\S+)/) {
7619 $entities_map_cache{$2} = $1;
7624 return \%entities_map_cache;
7627 =head2 entities_to_ascii(string)
7629 Given a string containing HTML entities like ö and 7, replace them
7630 with their ASCII equivalents.
7633 sub entities_to_ascii
7636 my $emap = &load_entities_map();
7637 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7638 $str =~ s/&#(\d+);/chr($1)/ge;
7642 =head2 get_product_name
7644 Returns either 'webmin' or 'usermin', depending on which program the current
7645 module is in. Useful for modules that can be installed into either.
7648 sub get_product_name
7650 return $gconfig{'product'} if (defined($gconfig{'product'}));
7651 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7656 Returns the character set for the current language, such as iso-8859-1.
7661 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7662 $current_lang_info->{'charset'} ?
7663 $current_lang_info->{'charset'} : $default_charset;
7667 =head2 get_display_hostname
7669 Returns the system's hostname for UI display purposes. This may be different
7670 from the actual hostname if you administrator has configured it so in the
7671 Webmin Configuration module.
7674 sub get_display_hostname
7676 if ($gconfig{'hostnamemode'} == 0) {
7677 return &get_system_hostname();
7679 elsif ($gconfig{'hostnamemode'} == 3) {
7680 return $gconfig{'hostnamedisplay'};
7683 my $h = $ENV{'HTTP_HOST'};
7685 if ($gconfig{'hostnamemode'} == 2) {
7686 $h =~ s/^(www|ftp|mail)\.//i;
7692 =head2 save_module_config([&config], [modulename])
7694 Saves the configuration for some module. The config parameter is an optional
7695 hash reference of names and values to save, which defaults to the global
7696 %config hash. The modulename parameter is the module to update the config
7697 file, which defaults to the current module.
7700 sub save_module_config
7702 my $c = $_[0] || { &get_module_variable('%config') };
7703 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7704 &write_file("$config_directory/$m/config", $c);
7707 =head2 save_user_module_config([&config], [modulename])
7709 Saves the user's Usermin preferences for some module. The config parameter is
7710 an optional hash reference of names and values to save, which defaults to the
7711 global %userconfig hash. The modulename parameter is the module to update the
7712 config file, which defaults to the current module.
7715 sub save_user_module_config
7717 my $c = $_[0] || { &get_module_variable('%userconfig') };
7718 my $m = $_[1] || &get_module_name();
7719 my $ucd = $user_config_directory;
7721 my @uinfo = @remote_user_info ? @remote_user_info
7722 : getpwnam($remote_user);
7723 return if (!@uinfo || !$uinfo[7]);
7724 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7726 &write_file("$ucd/$m/config", $c);
7729 =head2 nice_size(bytes, [min])
7731 Converts a number of bytes into a number followed by a suffix like GB, MB
7732 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7733 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7738 my ($units, $uname);
7739 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7740 $units = 1024*1024*1024*1024;
7743 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7744 $units = 1024*1024*1024;
7747 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7751 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7759 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7761 return $sz." ".$uname;
7764 =head2 get_perl_path
7766 Returns the path to Perl currently in use, such as /usr/bin/perl.
7771 if (open(PERL, "$config_directory/perl-path")) {
7777 return $^X if (-x $^X);
7778 return &has_command("perl");
7781 =head2 get_goto_module([&mods])
7783 Returns the details of a module that the current user should be re-directed
7784 to after logging in, or undef if none. Useful for themes.
7789 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7790 if ($gconfig{'gotomodule'}) {
7791 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7792 return $goto if ($goto);
7794 if (@mods == 1 && $gconfig{'gotoone'}) {
7800 =head2 select_all_link(field, form, [text])
7802 Returns HTML for a 'Select all' link that uses Javascript to select
7803 multiple checkboxes with the same name. The parameters are :
7805 =item field - Name of the checkbox inputs.
7807 =item form - Index of the form on the page.
7809 =item text - Message for the link, defaulting to 'Select all'.
7814 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7815 my ($field, $form, $text) = @_;
7817 $text ||= $text{'ui_selall'};
7818 return "<a class='select_all' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = true; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = true; } } return false'>$text</a>";
7821 =head2 select_invert_link(field, form, text)
7823 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7824 selection on multiple checkboxes with the same name. The parameters are :
7826 =item field - Name of the checkbox inputs.
7828 =item form - Index of the form on the page.
7830 =item text - Message for the link, defaulting to 'Invert selection'.
7833 sub select_invert_link
7835 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7836 my ($field, $form, $text) = @_;
7838 $text ||= $text{'ui_selinv'};
7839 return "<a class='select_invert' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = !ff.checked; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = !ff[i].checked; } } return false'>$text</a>";
7842 =head2 select_rows_link(field, form, text, &rows)
7844 Returns HTML for a link that uses Javascript to select rows with particular
7845 values for their checkboxes. The parameters are :
7847 =item field - Name of the checkbox inputs.
7849 =item form - Index of the form on the page.
7851 =item text - Message for the link, de
7853 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7856 sub select_rows_link
7858 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7859 my ($field, $form, $text, $rows) = @_;
7861 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7862 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7863 $js .= "return false;";
7864 return "<a href='#' onClick='$js'>$text</a>";
7867 =head2 check_pid_file(file)
7869 Given a pid file, returns the PID it contains if the process is running.
7874 open(PIDFILE, $_[0]) || return undef;
7875 my $pid = <PIDFILE>;
7877 $pid =~ /^\s*(\d+)/ || return undef;
7878 kill(0, $1) || return undef;
7884 Return the local os-specific library name to this module. For internal use only.
7889 my $mn = &get_module_name();
7890 my $md = &module_root_directory($mn);
7891 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7892 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7894 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7895 return "$mn-$gconfig{'os_type'}-lib.pl";
7897 elsif (-r "$md/$mn-generic-lib.pl") {
7898 return "$mn-generic-lib.pl";
7905 =head2 module_root_directory(module)
7907 Given a module name, returns its root directory. On a typical Webmin install,
7908 all modules are under the same directory - but it is theoretically possible to
7912 sub module_root_directory
7914 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7915 if (@root_directories > 1) {
7916 foreach my $r (@root_directories) {
7922 return "$root_directories[0]/$d";
7925 =head2 list_mime_types
7927 Returns a list of all known MIME types and their extensions, as a list of hash
7928 references with keys :
7930 =item type - The MIME type, like text/plain.
7932 =item exts - A list of extensions, like .doc and .avi.
7934 =item desc - A human-readable description for the MIME type.
7939 if (!@list_mime_types_cache) {
7941 open(MIME, "$root_directory/mime.types");
7945 if (s/#\s*(.*)$//g) {
7948 my ($type, @exts) = split(/\s+/);
7950 push(@list_mime_types_cache, { 'type' => $type,
7957 return @list_mime_types_cache;
7960 =head2 guess_mime_type(filename, [default])
7962 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7963 The optional default parameter sets a default type of use if none is found,
7964 which defaults to application/octet-stream.
7969 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7971 foreach my $t (&list_mime_types()) {
7972 foreach my $e (@{$t->{'exts'}}) {
7973 return $t->{'type'} if (lc($e) eq lc($ext));
7977 return @_ > 1 ? $_[1] : "application/octet-stream";
7980 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7982 Opens a file handle for writing to a temporary file, which will only be
7983 renamed over the real file when the handle is closed. This allows critical
7984 files like /etc/shadow to be updated safely, even if writing fails part way
7985 through due to lack of disk space. The parameters are :
7987 =item handle - File handle to open, as you would use in Perl's open function.
7989 =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.
7991 =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 $! with the error code.
7993 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7995 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
8001 # Just getting a temp file
8002 if (!defined($main::open_tempfiles{$_[0]})) {
8003 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
8004 my $dir = $1 || "/";
8005 my $tmp = "$dir/$2.webmintmp.$$";
8006 $main::open_tempfiles{$_[0]} = $tmp;
8007 push(@main::temporary_files, $tmp);
8009 return $main::open_tempfiles{$_[0]};
8013 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8014 $fh = &callers_package($fh);
8016 my %gaccess = &get_module_acl(undef, "");
8017 my $db = $gconfig{'debug_what_write'};
8018 if ($file =~ /\r|\n|\0/) {
8019 if ($noerror) { return 0; }
8020 else { &error("Filename contains invalid characters"); }
8022 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
8023 # Read-only mode .. veto all writes
8024 print STDERR "vetoing write to $file\n";
8025 return open($fh, ">$null_file");
8027 elsif ($file =~ /^(>|>>|)nul$/i) {
8028 # Write to Windows null device
8029 &webmin_debug_log($1 eq ">" ? "WRITE" :
8030 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
8032 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
8033 # Writes to /dev/null or TTYs don't need to be handled
8034 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
8035 return open($fh, $file);
8037 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
8038 &webmin_debug_log("WRITE", $1) if ($db);
8039 # Over-writing a file, via a temp file
8041 $file = &translate_filename($file);
8043 # Open the link target instead
8044 $file = &resolve_links($file);
8047 # Cannot open a directory!
8048 if ($noerror) { return 0; }
8049 else { &error("Cannot write to directory $file"); }
8051 my $tmp = &open_tempfile($file);
8052 my $ex = open($fh, ">$tmp");
8053 if (!$ex && $! =~ /permission/i) {
8054 # Could not open temp file .. try opening actual file
8056 $ex = open($fh, ">$file");
8057 delete($main::open_tempfiles{$file});
8060 $main::open_temphandles{$fh} = $file;
8063 if (!$ex && !$noerror) {
8064 &error(&text("efileopen", $file, $!));
8068 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
8069 # Just writing direct to a file
8070 &webmin_debug_log("WRITE", $1) if ($db);
8072 $file = &translate_filename($file);
8073 my @old_attributes = &get_clear_file_attributes($file);
8074 my $ex = open($fh, ">$file");
8075 &reset_file_attributes($file, \@old_attributes);
8076 $main::open_temphandles{$fh} = $file;
8077 if (!$ex && !$noerror) {
8078 &error(&text("efileopen", $file, $!));
8083 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
8084 # Appending to a file .. nothing special to do
8085 &webmin_debug_log("APPEND", $1) if ($db);
8087 $file = &translate_filename($file);
8088 my @old_attributes = &get_clear_file_attributes($file);
8089 my $ex = open($fh, ">>$file");
8090 &reset_file_attributes($file, \@old_attributes);
8091 $main::open_temphandles{$fh} = $file;
8092 if (!$ex && !$noerror) {
8093 &error(&text("efileopen", $file, $!));
8098 elsif ($file =~ /^([a-zA-Z]:)?\//) {
8099 # Read mode .. nothing to do here
8100 &webmin_debug_log("READ", $file) if ($db);
8101 $file = &translate_filename($file);
8102 return open($fh, $file);
8104 elsif ($file eq ">" || $file eq ">>") {
8105 my ($package, $filename, $line) = caller;
8106 if ($noerror) { return 0; }
8107 else { &error("Missing file to open at ${package}::${filename} line $line"); }
8110 my ($package, $filename, $line) = caller;
8111 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
8116 =head2 close_tempfile(file|handle)
8118 Copies a temp file to the actual file, assuming that all writes were
8119 successful. The handle must have been one passed to open_tempfile.
8125 my $fh = &callers_package($_[0]);
8127 if (defined($file = $main::open_temphandles{$fh})) {
8129 close($fh) || &error(&text("efileclose", $file, $!));
8130 delete($main::open_temphandles{$fh});
8131 return &close_tempfile($file);
8133 elsif (defined($main::open_tempfiles{$_[0]})) {
8135 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
8136 my @st = stat($_[0]);
8137 if (&is_selinux_enabled() && &has_command("chcon")) {
8138 # Set original security context
8139 system("chcon --reference=".quotemeta($_[0]).
8140 " ".quotemeta($main::open_tempfiles{$_[0]}).
8141 " >/dev/null 2>&1");
8143 my @old_attributes = &get_clear_file_attributes($_[0]);
8144 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
8146 # Set original permissions and ownership
8147 chmod($st[2], $_[0]);
8148 chown($st[4], $st[5], $_[0]);
8150 &reset_file_attributes($_[0], \@old_attributes);
8151 delete($main::open_tempfiles{$_[0]});
8152 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
8153 if ($main::open_templocks{$_[0]}) {
8154 &unlock_file($_[0]);
8155 delete($main::open_templocks{$_[0]});
8160 # Must be closing a handle not associated with a file
8166 =head2 print_tempfile(handle, text, ...)
8168 Like the normal print function, but calls &error on failure. Useful when
8169 combined with open_tempfile, to ensure that a criticial file is never
8170 only partially written.
8175 my ($fh, @args) = @_;
8176 $fh = &callers_package($fh);
8177 (print $fh @args) || &error(&text("efilewrite",
8178 $main::open_temphandles{$fh} || $fh, $!));
8181 =head2 is_selinux_enabled
8183 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
8186 sub is_selinux_enabled
8188 if (!defined($main::selinux_enabled_cache)) {
8190 if ($gconfig{'os_type'} !~ /-linux$/) {
8191 # Not on linux, so no way
8192 $main::selinux_enabled_cache = 0;
8194 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
8195 # Use global config file
8196 $main::selinux_enabled_cache =
8197 $seconfig{'SELINUX'} eq 'disabled' ||
8198 !$seconfig{'SELINUX'} ? 0 : 1;
8201 # Use selinuxenabled command
8202 #$selinux_enabled_cache =
8203 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
8204 $main::selinux_enabled_cache = 0;
8207 return $main::selinux_enabled_cache;
8210 =head2 get_clear_file_attributes(file)
8212 Finds file attributes that may prevent writing, clears them and returns them
8213 as a list. May call error. Mainly for internal use by open_tempfile and
8217 sub get_clear_file_attributes
8221 if ($gconfig{'chattr'}) {
8222 # Get original immutable bit
8223 my $out = &backquote_command(
8224 "lsattr ".quotemeta($file)." 2>/dev/null");
8226 $out =~ s/\s\S+\n//;
8227 @old_attributes = grep { $_ ne '-' } split(//, $out);
8229 if (&indexof("i", @old_attributes) >= 0) {
8230 my $err = &backquote_logged(
8231 "chattr -i ".quotemeta($file)." 2>&1");
8233 &error("Failed to remove immutable bit on ".
8238 return @old_attributes;
8241 =head2 reset_file_attributes(file, &attributes)
8243 Put back cleared attributes on some file. May call error. Mainly for internal
8244 use by close_tempfile.
8247 sub reset_file_attributes
8249 my ($file, $old_attributes) = @_;
8250 if (&indexof("i", @$old_attributes) >= 0) {
8251 my $err = &backquote_logged(
8252 "chattr +i ".quotemeta($file)." 2>&1");
8254 &error("Failed to restore immutable bit on ".
8260 =head2 cleanup_tempnames
8262 Remove all temporary files generated using transname. Typically only called
8263 internally when a Webmin script exits.
8266 sub cleanup_tempnames
8268 foreach my $t (@main::temporary_files) {
8271 @main::temporary_files = ( );
8274 =head2 open_lock_tempfile([handle], file, [no-error])
8276 Returns a temporary file for writing to some actual file, and also locks it.
8277 Effectively the same as calling lock_file and open_tempfile on the same file,
8278 but calls the unlock for you automatically when it is closed.
8281 sub open_lock_tempfile
8283 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8284 $fh = &callers_package($fh);
8285 my $lockfile = $file;
8286 $lockfile =~ s/^[^\/]*//;
8287 if ($lockfile =~ /^\//) {
8288 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8290 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8295 $main::end_exit_status ||= $?;
8296 if ($$ == $main::initial_process_id) {
8297 # Exiting from initial process
8298 &cleanup_tempnames();
8299 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8300 $main::debug_log_start_module eq &get_module_name()) {
8301 my $len = time() - $main::debug_log_start_time;
8302 &webmin_debug_log("STOP", "runtime=$len");
8303 $main::debug_log_start_time = 0;
8305 if (!$ENV{'SCRIPT_NAME'} &&
8306 $main::initial_module_name eq &get_module_name()) {
8307 # In a command-line script - call the real exit, so that the
8308 # exit status gets properly propogated. In some cases this
8309 # was not happening.
8310 exit($main::end_exit_status);
8315 =head2 month_to_number(month)
8317 Converts a month name like feb to a number like 1.
8322 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8325 =head2 number_to_month(number)
8327 Converts a number like 1 to a month name like Feb.
8332 return ucfirst($number_to_month_map{$_[0]});
8335 =head2 get_rbac_module_acl(user, module)
8337 Returns a hash reference of RBAC overrides ACLs for some user and module.
8338 May return undef if none exist (indicating access denied), or the string *
8339 if full access is granted.
8342 sub get_rbac_module_acl
8344 my ($user, $mod) = @_;
8345 eval "use Authen::SolarisRBAC";
8346 return undef if ($@);
8349 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8350 # Automagic webmin.modulename.admin authorization exists .. allow access
8352 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8353 %rv = ( 'noconfig' => 1 );
8360 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8364 my ($auths, $acls) = split(/\s+/, $_);
8365 my @auths = split(/,/, $auths);
8367 my ($merge) = ($acls =~ s/^\+//);
8369 if ($auths eq "*") {
8370 # These ACLs apply to all RBAC users.
8371 # Only if there is some that match a specific authorization
8372 # later will they be used though.
8375 # Check each of the RBAC authorizations
8376 foreach my $a (@auths) {
8377 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8382 $foundany++ if ($gotall);
8385 # Found an RBAC authorization - return the ACLs
8386 return "*" if ($acls eq "*");
8387 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8389 # Just add to current set
8390 foreach my $a (keys %acl) {
8401 return !$foundany ? undef : %rv ? \%rv : undef;
8404 =head2 supports_rbac([module])
8406 Returns 1 if RBAC client support is available, such as on Solaris.
8411 return 0 if ($gconfig{'os_type'} ne 'solaris');
8412 eval "use Authen::SolarisRBAC";
8415 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8420 =head2 supports_ipv6()
8422 Returns 1 if outgoing IPv6 connections can be made
8427 return $ipv6_module_error ? 0 : 1;
8430 =head2 use_rbac_module_acl(user, module)
8432 Returns 1 if some user should use RBAC to get permissions for a module
8435 sub use_rbac_module_acl
8437 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8438 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8439 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8440 my %access = &get_module_acl($u, $m, 1);
8441 return $access{'rbac'} ? 1 : 0;
8444 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8446 Runs some command, possibly feeding it input and capturing output to the
8447 give files or scalar references. The parameters are :
8449 =item command - Full command to run, possibly including shell meta-characters.
8451 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8453 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8455 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8457 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8459 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8464 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8465 if (&is_readonly_mode() && !$safe) {
8466 print STDERR "Vetoing command $_[0]\n";
8470 $cmd = &translate_command($cmd);
8472 # Use ` operator where possible
8473 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8474 if (!$stdin && ref($stdout) && !$stderr) {
8475 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8476 $$stdout = `$cmd 2>$null_file`;
8479 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8480 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8481 $$stdout = `$cmd 2>&1`;
8484 elsif (!$stdin && !$stdout && !$stderr) {
8485 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8486 return system("$cmd >$null_file 2>$null_file <$null_file");
8490 $| = 1; # needed on some systems to flush before forking
8491 pipe(EXECSTDINr, EXECSTDINw);
8492 pipe(EXECSTDOUTr, EXECSTDOUTw);
8493 pipe(EXECSTDERRr, EXECSTDERRw);
8495 if (!($pid = fork())) {
8499 open(STDIN, "<&EXECSTDINr");
8500 open(STDOUT, ">&EXECSTDOUTw");
8501 if (ref($stderr) && $stderr eq $stdout) {
8502 open(STDERR, ">&EXECSTDOUTw");
8505 open(STDERR, ">&EXECSTDERRw");
8512 my $fullcmd = "($cmd)";
8513 if ($stdin && !ref($stdin)) {
8514 $fullcmd .= " <$stdin";
8516 if ($stdout && !ref($stdout)) {
8517 $fullcmd .= " >$stdout";
8519 if ($stderr && !ref($stderr)) {
8520 if ($stderr eq $stdout) {
8521 $fullcmd .= " 2>&1";
8524 $fullcmd .= " 2>$stderr";
8527 if ($gconfig{'os_type'} eq 'windows') {
8531 exec("/bin/sh", "-c", $fullcmd);
8533 print "Exec failed : $!\n";
8540 # Feed input and capture output
8542 if ($stdin && ref($stdin)) {
8543 print EXECSTDINw $$stdin;
8546 if ($stdout && ref($stdout)) {
8548 while(<EXECSTDOUTr>) {
8553 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8555 while(<EXECSTDERRr>) {
8566 =head2 open_readfile(handle, file)
8568 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8569 exactly the same as Perl's open function.
8574 my ($fh, $file) = @_;
8575 $fh = &callers_package($fh);
8576 my $realfile = &translate_filename($file);
8577 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8578 return open($fh, "<".$realfile);
8581 =head2 open_execute_command(handle, command, output?, safe?)
8583 Runs some command, with the specified file handle set to either write to it if
8584 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8585 indicates if the command modifies the state of the system or not.
8588 sub open_execute_command
8590 my ($fh, $cmd, $mode, $safe) = @_;
8591 $fh = &callers_package($fh);
8592 my $realcmd = &translate_command($cmd);
8593 if (&is_readonly_mode() && !$safe) {
8594 # Don't actually run it
8595 print STDERR "vetoing command $cmd\n";
8598 return open($fh, ">$null_file");
8601 return open($fh, $null_file);
8605 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8606 if ($gconfig{'debug_what_cmd'});
8608 return open($fh, "| $cmd");
8610 elsif ($mode == 1) {
8611 return open($fh, "$cmd 2>$null_file |");
8613 elsif ($mode == 2) {
8614 return open($fh, "$cmd 2>&1 |");
8618 =head2 translate_filename(filename)
8620 Applies all relevant registered translation functions to a filename. Mostly
8621 for internal use, and typically does nothing.
8624 sub translate_filename
8626 my ($realfile) = @_;
8627 my @funcs = grep { $_->[0] eq &get_module_name() ||
8628 !defined($_->[0]) } @main::filename_callbacks;
8629 foreach my $f (@funcs) {
8631 $realfile = &$func($realfile, @{$f->[2]});
8636 =head2 translate_command(filename)
8638 Applies all relevant registered translation functions to a command. Mostly
8639 for internal use, and typically does nothing.
8642 sub translate_command
8645 my @funcs = grep { $_->[0] eq &get_module_name() ||
8646 !defined($_->[0]) } @main::command_callbacks;
8647 foreach my $f (@funcs) {
8649 $realcmd = &$func($realcmd, @{$f->[2]});
8654 =head2 register_filename_callback(module|undef, &function, &args)
8656 Registers some function to be called when the specified module (or all
8657 modules) tries to open a file for reading and writing. The function must
8658 return the actual file to open. This allows you to override which files
8659 other code actually operates on, via the translate_filename function.
8662 sub register_filename_callback
8664 my ($mod, $func, $args) = @_;
8665 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8668 =head2 register_command_callback(module|undef, &function, &args)
8670 Registers some function to be called when the specified module (or all
8671 modules) tries to execute a command. The function must return the actual
8672 command to run. This allows you to override which commands other other code
8673 actually runs, via the translate_command function.
8676 sub register_command_callback
8678 my ($mod, $func, $args) = @_;
8679 push(@main::command_callbacks, [ $mod, $func, $args ]);
8682 =head2 capture_function_output(&function, arg, ...)
8684 Captures output that some function prints to STDOUT, and returns it. Useful
8685 for functions outside your control that print data when you really want to
8686 manipulate it before output.
8689 sub capture_function_output
8691 my ($func, @args) = @_;
8692 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8693 my $old = select(SOCKET1);
8694 my @rv = &$func(@args);
8703 return wantarray ? ($out, \@rv) : $out;
8706 =head2 capture_function_output_tempfile(&function, arg, ...)
8708 Behaves the same as capture_function_output, but uses a temporary file
8709 to avoid buffer full problems.
8712 sub capture_function_output_tempfile
8714 my ($func, @args) = @_;
8715 my $temp = &transname();
8716 open(BUFFER, ">$temp");
8717 my $old = select(BUFFER);
8718 my @rv = &$func(@args);
8721 my $out = &read_file_contents($temp);
8722 &unlink_file($temp);
8723 return wantarray ? ($out, \@rv) : $out;
8726 =head2 modules_chooser_button(field, multiple, [form])
8728 Returns HTML for a button for selecting one or many Webmin modules.
8729 field - Name of the HTML field to place the module names into.
8730 multiple - Set to 1 if multiple modules can be selected.
8731 form - Index of the form on the page.
8734 sub modules_chooser_button
8736 return &theme_modules_chooser_button(@_)
8737 if (defined(&theme_modules_chooser_button));
8738 my $form = defined($_[2]) ? $_[2] : 0;
8739 my $w = $_[1] ? 700 : 500;
8741 if ($_[1] && $gconfig{'db_sizemodules'}) {
8742 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8744 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8745 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8747 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";
8750 =head2 substitute_template(text, &hash)
8752 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8753 the text replaces it with the value of the hash key foo. Also supports blocks
8754 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8755 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8758 sub substitute_template
8760 # Add some extra fixed parameters to the hash
8761 my %hash = %{$_[1]};
8762 $hash{'hostname'} = &get_system_hostname();
8763 $hash{'webmin_config'} = $config_directory;
8764 $hash{'webmin_etc'} = $config_directory;
8765 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8766 $hash{'webmin_var'} = $var_directory;
8768 # Add time-based parameters, for use in DNS
8769 $hash{'current_time'} = time();
8770 my @tm = localtime($hash{'current_time'});
8771 $hash{'current_year'} = $tm[5]+1900;
8772 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8773 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8774 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8775 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8776 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8778 # Actually do the substition
8780 foreach my $s (keys %hash) {
8781 next if ($s eq ''); # Prevent just $ from being subbed
8784 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8785 $rv =~ s/\$\Q$us\E/$sv/g;
8787 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8788 # and ${IF}..${ENDIF} with value
8789 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8790 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8792 # Replace $IF..$ELSE..$ENDIF block with first value,
8793 # and $IF..$ENDIF with value
8794 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8795 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8797 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8798 # matching, nothing if not
8799 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8800 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8802 # Replace $IFEQ..$ENDIFEQ block with first value if
8803 # matching, nothing if not
8804 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8805 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8808 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8809 # and ${IF}..${ENDIF} with nothing
8810 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8811 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8813 # Replace $IF..$ELSE..$ENDIF block with second value,
8814 # and $IF..$ENDIF with nothing
8815 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8816 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8818 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8819 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8820 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8824 # Now assume any $IF blocks whose variables are not present in the hash
8825 # evaluate to false.
8826 # $IF...$ELSE x $ENDIF => x
8827 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8828 # $IF...x...$ENDIF => (nothing)
8829 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8830 # ${var} => (nothing)
8831 $rv =~ s/\$\{[A-Z]+\}//g;
8836 =head2 running_in_zone
8838 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8839 disable module and features that are not appropriate, like those that modify
8840 mounted filesystems.
8845 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8846 $gconfig{'os_version'} < 10);
8847 my $zn = `zonename 2>$null_file`;
8849 return $zn && $zn ne "global";
8852 =head2 running_in_vserver
8854 Returns 1 if the current Webmin instance is running in a Linux VServer.
8855 Used to disable modules and features that are not appropriate.
8858 sub running_in_vserver
8860 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8863 open(MTAB, "/etc/mtab");
8865 my ($dev, $mp) = split(/\s+/, $_);
8866 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8875 =head2 running_in_xen
8877 Returns 1 if Webmin is running inside a Xen instance, by looking
8878 at /proc/xen/capabilities.
8883 return 0 if (!-r "/proc/xen/capabilities");
8884 my $cap = &read_file_contents("/proc/xen/capabilities");
8885 return $cap =~ /control_d/ ? 0 : 1;
8888 =head2 running_in_openvz
8890 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8891 at /proc/vz/veinfo for a non-zero line.
8894 sub running_in_openvz
8896 return 0 if (!-r "/proc/vz/veinfo");
8897 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8898 return 0 if (!$lref || !@$lref);
8899 foreach my $l (@$lref) {
8901 my @ll = split(/\s+/, $l);
8902 return 0 if ($ll[0] eq '0');
8907 =head2 list_categories(&modules, [include-empty])
8909 Returns a hash mapping category codes to names, including any custom-defined
8910 categories. The modules parameter must be an array ref of module hash objects,
8911 as returned by get_all_module_infos.
8916 my ($mods, $empty) = @_;
8917 my (%cats, %catnames);
8918 &read_file("$config_directory/webmin.catnames", \%catnames);
8919 foreach my $o (@lang_order_list) {
8920 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8925 foreach my $m (@$mods) {
8926 my $c = $m->{'category'};
8927 next if ($cats{$c});
8928 if (defined($catnames{$c})) {
8929 $cats{$c} = $catnames{$c};
8931 elsif ($text{"category_$c"}) {
8932 $cats{$c} = $text{"category_$c"};
8935 # try to get category name from module ..
8936 my %mtext = &load_language($m->{'dir'});
8937 if ($mtext{"category_$c"}) {
8938 $cats{$c} = $mtext{"category_$c"};
8941 $c = $m->{'category'} = "";
8942 $cats{$c} = $text{"category_$c"};
8949 =head2 is_readonly_mode
8951 Returns 1 if the current user is in read-only mode, and thus all writes
8952 to files and command execution should fail.
8955 sub is_readonly_mode
8957 if (!defined($main::readonly_mode_cache)) {
8958 my %gaccess = &get_module_acl(undef, "");
8959 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8961 return $main::readonly_mode_cache;
8964 =head2 command_as_user(user, with-env?, command, ...)
8966 Returns a command to execute some command as the given user, using the
8967 su statement. If on Linux, the /bin/sh shell is forced in case the user
8968 does not have a valid shell. If with-env is set to 1, the -s flag is added
8969 to the su command to read the user's .profile or .bashrc file.
8974 my ($user, $env, @args) = @_;
8975 my @uinfo = getpwnam($user);
8976 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8977 # User shell doesn't appear to be valid
8978 if ($gconfig{'os_type'} =~ /-linux$/) {
8979 # Use -s /bin/sh to force it
8980 $shellarg = " -s /bin/sh";
8982 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8983 $gconfig{'os_type'} eq 'solaris' &&
8984 $gconfig{'os_version'} >= 11 ||
8985 $gconfig{'os_type'} eq 'macos') {
8986 # Use -m and force /bin/sh
8987 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8991 my $rv = "su".($env ? " -" : "").$shellarg.
8992 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8996 =head2 list_osdn_mirrors(project, file)
8998 This function is now deprecated in favor of letting sourceforge just
8999 redirect to the best mirror, and now just returns their primary download URL.
9002 sub list_osdn_mirrors
9004 my ($project, $file) = @_;
9005 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
9007 'mirror' => 'downloads' } );
9010 =head2 convert_osdn_url(url)
9012 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
9013 or http://prdownloads.sourceforge.net/project/file.zip , convert it
9014 to a real URL on the sourceforge download redirector.
9017 sub convert_osdn_url
9020 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
9021 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
9022 # Always use the Sourceforge mail download URL, which does
9023 # a location-based redirect for us
9024 my ($project, $file) = ($1, $2);
9025 $url = "http://prdownloads.sourceforge.net/sourceforge/".
9027 return wantarray ? ( $url, 0 ) : $url;
9030 # Some other source .. don't change
9031 return wantarray ? ( $url, 2 ) : $url;
9035 =head2 get_current_dir
9037 Returns the directory the current process is running in.
9043 if ($gconfig{'os_type'} eq 'windows') {
9056 =head2 supports_users
9058 Returns 1 if the current OS supports Unix user concepts and functions like
9059 su , getpw* and so on. This will be true on Linux and other Unixes, but false
9065 return $gconfig{'os_type'} ne 'windows';
9068 =head2 supports_symlinks
9070 Returns 1 if the current OS supports symbolic and hard links. This will not
9071 be the case on Windows.
9074 sub supports_symlinks
9076 return $gconfig{'os_type'} ne 'windows';
9079 =head2 quote_path(path)
9081 Returns a path with safe quoting for the current operating system.
9087 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
9088 # Windows only supports "" style quoting
9092 return quotemeta($path);
9096 =head2 get_windows_root
9098 Returns the base windows system directory, like c:/windows.
9101 sub get_windows_root
9103 if ($ENV{'SystemRoot'}) {
9104 my $rv = $ENV{'SystemRoot'};
9109 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
9113 =head2 read_file_contents(file)
9115 Given a filename, returns its complete contents as a string. Effectively
9116 the same as the Perl construct `cat file`.
9119 sub read_file_contents
9121 &open_readfile(FILE, $_[0]) || return undef;
9128 =head2 unix_crypt(password, salt)
9130 Performs Unix encryption on a password, using the built-in crypt function or
9131 the Crypt::UnixCrypt module if the former does not work. The salt parameter
9132 must be either an already-hashed password, or a two-character alpha-numeric
9138 my ($pass, $salt) = @_;
9139 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
9140 my $rv = eval "crypt(\$pass, \$salt)";
9142 return $rv if ($rv && !$@);
9143 eval "use Crypt::UnixCrypt";
9145 return Crypt::UnixCrypt::crypt($pass, $salt);
9148 &error("Failed to encrypt password : $err");
9152 =head2 split_quoted_string(string)
9154 Given a string like I<foo "bar baz" quux>, returns the array :
9158 sub split_quoted_string
9162 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
9163 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
9164 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
9171 =head2 write_to_http_cache(url, file|&data)
9173 Updates the Webmin cache with the contents of the given file, possibly also
9174 clearing out old data. Mainly for internal use by http_download.
9177 sub write_to_http_cache
9179 my ($url, $file) = @_;
9180 return 0 if (!$gconfig{'cache_size'});
9182 # Don't cache downloads that look dynamic
9183 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
9187 # Check if the current module should do caching
9188 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9189 # Caching all except some modules
9190 my @mods = split(/\s+/, $1);
9191 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9193 elsif ($gconfig{'cache_mods'}) {
9194 # Only caching some modules
9195 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9196 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9202 $size = length($$file);
9205 my @st = stat($file);
9209 if ($size > $gconfig{'cache_size'}) {
9210 # Bigger than the whole cache - so don't save it
9215 $cfile = "$main::http_cache_directory/$cfile";
9217 # See how much we have cached currently, clearing old files
9219 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
9220 opendir(CACHEDIR, $main::http_cache_directory);
9221 foreach my $f (readdir(CACHEDIR)) {
9222 next if ($f eq "." || $f eq "..");
9223 my $path = "$main::http_cache_directory/$f";
9224 my @st = stat($path);
9225 if ($gconfig{'cache_days'} &&
9226 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9227 # This file is too old .. trash it
9232 push(@cached, [ $path, $st[7], $st[9] ]);
9236 @cached = sort { $a->[2] <=> $b->[2] } @cached;
9237 while($total+$size > $gconfig{'cache_size'} && @cached) {
9238 # Cache is too big .. delete some files until the new one will fit
9239 unlink($cached[0]->[0]);
9240 $total -= $cached[0]->[1];
9244 # Finally, write out the new file
9246 &open_tempfile(CACHEFILE, ">$cfile");
9247 &print_tempfile(CACHEFILE, $$file);
9248 &close_tempfile(CACHEFILE);
9251 my ($ok, $err) = ©_source_dest($file, $cfile);
9257 =head2 check_in_http_cache(url)
9259 If some URL is in the cache and valid, return the filename for it. Mainly
9260 for internal use by http_download.
9263 sub check_in_http_cache
9266 return undef if (!$gconfig{'cache_size'});
9268 # Check if the current module should do caching
9269 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9270 # Caching all except some modules
9271 my @mods = split(/\s+/, $1);
9272 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9274 elsif ($gconfig{'cache_mods'}) {
9275 # Only caching some modules
9276 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9277 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9282 $cfile = "$main::http_cache_directory/$cfile";
9283 my @st = stat($cfile);
9284 return undef if (!@st || !$st[7]);
9285 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9290 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9295 =head2 supports_javascript
9297 Returns 1 if the current browser is assumed to support javascript.
9300 sub supports_javascript
9302 if (defined(&theme_supports_javascript)) {
9303 return &theme_supports_javascript();
9305 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9308 =head2 get_module_name
9310 Returns the name of the Webmin module that called this function. For internal
9311 use only by other API functions.
9316 return &get_module_variable('$module_name');
9319 =head2 get_module_variable(name, [ref])
9321 Returns the value of some variable which is set in the caller's context, if
9322 using the new WebminCore package. For internal use only.
9325 sub get_module_variable
9327 my ($v, $wantref) = @_;
9328 my $slash = $wantref ? "\\" : "";
9329 my $thispkg = &web_libs_package();
9330 if ($thispkg eq 'WebminCore') {
9331 my ($vt, $vn) = split('', $v, 2);
9333 for(my $i=0; ($callpkg) = caller($i); $i++) {
9334 last if ($callpkg ne $thispkg);
9336 return eval "${slash}${vt}${callpkg}::${vn}";
9338 return eval "${slash}${v}";
9341 =head2 clear_time_locale()
9343 Temporarily force the locale to C, until reset_time_locale is called. This is
9344 useful if your code is going to call C<strftime> from the POSIX package, and
9345 you want to ensure that the output is in a consistent format.
9348 sub clear_time_locale
9350 if ($main::clear_time_locale_count == 0) {
9353 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9354 POSIX::setlocale(POSIX::LC_TIME, "C");
9357 $main::clear_time_locale_count++;
9360 =head2 reset_time_locale()
9362 Revert the locale to whatever it was before clear_time_locale was called
9365 sub reset_time_locale
9367 if ($main::clear_time_locale_count == 1) {
9369 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9370 $main::clear_time_locale_old = undef;
9373 $main::clear_time_locale_count--;
9376 =head2 callers_package(filehandle)
9378 Convert a non-module filehandle like FOO to one qualified with the
9379 caller's caller's package, like fsdump::FOO. For internal use only.
9385 my $callpkg = (caller(1))[0];
9386 my $thispkg = &web_libs_package();
9387 if (!ref($fh) && $fh !~ /::/ &&
9388 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9389 $fh = $callpkg."::".$fh;
9394 =head2 web_libs_package()
9396 Returns the package this code is in. We can't always trust __PACKAGE__. For
9400 sub web_libs_package
9402 if ($called_from_webmin_core) {
9403 return "WebminCore";
9408 =head2 get_userdb_string
9410 Returns the URL-style string for connecting to the users and groups database
9413 sub get_userdb_string
9415 return undef if ($main::no_miniserv_userdb);
9417 &get_miniserv_config(\%miniserv);
9418 return $miniserv{'userdb'};
9421 =head2 connect_userdb(string)
9423 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9424 On failure returns an error message string. In an array context, returns the
9431 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9432 if ($proto eq "mysql") {
9433 # Connect to MySQL with DBI
9434 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9435 $drh || return $text{'sql_emysqldriver'};
9436 my ($host, $port) = split(/:/, $host);
9437 my $cstr = "database=$prefix;host=$host";
9438 $cstr .= ";port=$port" if ($port);
9439 my $dbh = $drh->connect($cstr, $user, $pass, { });
9440 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9441 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9443 elsif ($proto eq "postgresql") {
9444 # Connect to PostgreSQL with DBI
9445 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9446 $drh || return $text{'sql_epostgresqldriver'};
9447 my ($host, $port) = split(/:/, $host);
9448 my $cstr = "dbname=$prefix;host=$host";
9449 $cstr .= ";port=$port" if ($port);
9450 my $dbh = $drh->connect($cstr, $user, $pass);
9451 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9452 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9454 elsif ($proto eq "ldap") {
9455 # Connect with perl LDAP module
9456 eval "use Net::LDAP";
9457 $@ && return $text{'sql_eldapdriver'};
9458 my ($host, $port) = split(/:/, $host);
9459 my $scheme = $args->{'scheme'} || 'ldap';
9461 $port = $scheme eq 'ldaps' ? 636 : 389;
9463 my $ldap = Net::LDAP->new($host,
9465 'scheme' => $scheme);
9466 $ldap || return &text('sql_eldapconnect', $host);
9468 if ($args->{'tls'}) {
9469 # Switch to TLS mode
9470 eval { $mesg = $ldap->start_tls(); };
9471 if ($@ || !$mesg || $mesg->code) {
9472 return &text('sql_eldaptls',
9473 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9476 # Login to the server
9478 $mesg = $ldap->bind(dn => $user, password => $pass);
9481 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9483 if (!$mesg || $mesg->code) {
9484 return &text('sql_eldaplogin', $user,
9485 $mesg ? $mesg->error : "Unknown error");
9487 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9490 return "Unknown protocol $proto";
9494 =head2 disconnect_userdb(string, &handle)
9496 Closes a handle opened by connect_userdb
9499 sub disconnect_userdb
9502 if ($str =~ /^(mysql|postgresql):/) {
9504 if (!$h->{'AutoCommit'}) {
9509 elsif ($str =~ /^ldap:/) {
9516 =head2 split_userdb_string(string)
9518 Converts a string like mysql://user:pass@host/db into separate parts
9521 sub split_userdb_string
9524 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9525 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9526 ($1, $2, $3, $4, $5, $7);
9527 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9528 return ($proto, $user, $pass, $host, $prefix, \%args);
9533 $done_web_lib_funcs = 1;