1 =head1 web-lib-funcs.pl
3 Common functions for Webmin CGI scripts. This file gets in-directly included
4 by all scripts that use web-lib.pl.
9 ui_print_header(undef, 'My Module', '');
10 print 'This is Webmin version ',get_webmin_version(),'<p>\n';
19 $ipv6_module_error = $@;
21 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
22 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
23 %done_foreign_require $webmin_feedback_address
24 $user_skill_level $pragma_no_cache $foreign_args);
26 use vars qw($module_index_name $number_to_month_map $month_to_number_map
27 $umask_already $default_charset $licence_status $os_type
28 $licence_message $script_name $loaded_theme_oo_library
29 $done_web_lib_funcs $os_version $module_index_link
30 $called_from_webmin_core $ipv6_module_error);
32 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
34 Fill the given hash reference with name=value pairs from a file. The required
37 =item file - The file to head, which must be text with each line like name=value
39 =item hash - The hash reference to add values read from the file to.
41 =item order - If given, an array reference to add names to in the order they were read
43 =item lowercase - If set to 1, names are converted to lower case
45 =item split-char - If set, names and values are split on this character instead of =
51 my $split = defined($_[4]) ? $_[4] : "=";
52 my $realfile = &translate_filename($_[0]);
53 &open_readfile(ARFILE, $_[0]) || return 0;
56 my $hash = index($_, "#");
57 my $eq = index($_, $split);
58 if ($hash != 0 && $eq >= 0) {
59 my $n = substr($_, 0, $eq);
60 my $v = substr($_, $eq+1);
62 $_[1]->{$_[3] ? lc($n) : $n} = $v;
63 push(@{$_[2]}, $n) if ($_[2]);
67 $main::read_file_missing{$realfile} = 0; # It exists now
68 if (defined($main::read_file_cache{$realfile})) {
69 %{$main::read_file_cache{$realfile}} = %{$_[1]};
74 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
76 Like read_file, but reads from an in-memory cache if the file has already been
77 read in this Webmin script. Recommended, as it behaves exactly the same as
78 read_file, but can be much faster.
83 my $realfile = &translate_filename($_[0]);
84 if (defined($main::read_file_cache{$realfile})) {
86 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
89 elsif ($main::read_file_missing{$realfile}) {
90 # Doesn't exist, so don't re-try read
94 # Actually read the file
96 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
97 %{$main::read_file_cache{$realfile}} = %d;
98 %{$_[1]} = ( %{$_[1]}, %d );
102 # Flag as non-existant
103 $main::read_file_missing{$realfile} = 1;
109 =head2 read_file_cached_with_stat(file, &hash, [&order], [lowercase], [split-char])
111 Like read_file, but reads from an in-memory cache if the file has already been
112 read in this Webmin script AND has not changed.
115 sub read_file_cached_with_stat
117 my $realfile = &translate_filename($_[0]);
118 my $t = $main::read_file_cache_time{$realfile};
119 my @st = stat($realfile);
120 if ($t && $st[9] != $t) {
121 # Changed, invalidate cache
122 delete($main::read_file_cache{$realfile});
124 my $rv = &read_file_cached(@_);
125 $main::read_file_cache_time{$realfile} = $st[9];
129 =head2 write_file(file, &hash, [join-char])
131 Write out the contents of a hash as name=value lines. The parameters are :
133 =item file - Full path to write to
135 =item hash - A hash reference containing names and values to output
137 =item join-char - If given, names and values are separated by this instead of =
143 my $join = defined($_[2]) ? $_[2] : "=";
144 my $realfile = &translate_filename($_[0]);
145 &read_file($_[0], \%old, \@order);
146 &open_tempfile(ARFILE, ">$_[0]");
147 foreach $k (@order) {
148 if (exists($_[1]->{$k})) {
149 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
150 &error(&text("efilewrite", $realfile, $!));
153 foreach $k (keys %{$_[1]}) {
154 if (!exists($old{$k})) {
155 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
156 &error(&text("efilewrite", $realfile, $!));
159 &close_tempfile(ARFILE);
160 if (defined($main::read_file_cache{$realfile})) {
161 %{$main::read_file_cache{$realfile}} = %{$_[1]};
163 if (defined($main::read_file_missing{$realfile})) {
164 $main::read_file_missing{$realfile} = 0;
168 =head2 html_escape(string)
170 Converts &, < and > codes in text to HTML entities, and returns the new string.
171 This should be used when including data read from other sources in HTML pages.
180 $tmp =~ s/\"/"/g;
181 $tmp =~ s/\'/'/g;
186 =head2 quote_escape(string, [only-quote])
188 Converts ' and " characters in a string into HTML entities, and returns it.
189 Useful for outputing HTML tag values.
194 my ($tmp, $only) = @_;
195 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
196 # convert &, unless it is part of &#nnn; or &foo;
197 $tmp =~ s/&([^#])/&$1/g;
199 $tmp =~ s/&$/&/g;
200 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
201 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
205 =head2 tempname([filename])
207 Returns a mostly random temporary file name, typically under the /tmp/.webmin
208 directory. If filename is given, this will be the base name used. Otherwise
209 a unique name is selected randomly.
214 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
215 $gconfig{'tempdir_'.&get_module_name()} :
216 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
217 $ENV{'TEMP'} ? $ENV{'TEMP'} :
218 $ENV{'TMP'} ? $ENV{'TMP'} :
219 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
220 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
221 "$remote_user_info[7]/.tmp" :
222 @remote_user_info ? $tmp_base."-".$remote_user :
223 $< != 0 ? $tmp_base."-".getpwuid($<) :
225 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
226 # On Windows system, just create temp dir if missing
228 mkdir($tmp_dir, 0755) ||
229 &error("Failed to create temp directory $tmp_dir : $!");
233 # On Unix systems, need to make sure temp dir is valid
235 while($tries++ < 10) {
236 my @st = lstat($tmp_dir);
237 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
239 unlink($tmp_dir) || rmdir($tmp_dir) ||
240 system("/bin/rm -rf ".quotemeta($tmp_dir));
242 mkdir($tmp_dir, 0755) || next;
243 chown($<, $(, $tmp_dir);
244 chmod(0755, $tmp_dir);
247 my @st = lstat($tmp_dir);
248 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
252 if (defined($_[0]) && $_[0] !~ /\.\./) {
253 $rv = "$tmp_dir/$_[0]";
256 $main::tempfilecount++;
258 $rv = $tmp_dir."/".int(rand(1000000))."_".
259 $main::tempfilecount."_".$scriptname;
264 =head2 transname([filename])
266 Behaves exactly like tempname, but records the temp file for deletion when the
267 current Webmin script process exits.
272 my $rv = &tempname(@_);
273 push(@main::temporary_files, $rv);
277 =head2 trunc(string, maxlen)
279 Truncates a string to the shortest whole word less than or equal to the
280 given width. Useful for word wrapping.
285 if (length($_[0]) <= $_[1]) {
288 my $str = substr($_[0],0,$_[1]);
297 =head2 indexof(string, value, ...)
299 Returns the index of some value in an array of values, or -1 if it was not
305 for(my $i=1; $i <= $#_; $i++) {
306 if ($_[$i] eq $_[0]) { return $i - 1; }
311 =head2 indexoflc(string, value, ...)
313 Like indexof, but does a case-insensitive match
318 my $str = lc(shift(@_));
319 my @arr = map { lc($_) } @_;
320 return &indexof($str, @arr);
323 =head2 sysprint(handle, [string]+)
325 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
326 as a replacement for print when writing to pipes or sockets.
331 my $fh = &callers_package($_[0]);
332 my $str = join('', @_[1..$#_]);
333 syswrite $fh, $str, length($str);
336 =head2 check_ipaddress(ip)
338 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
343 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
344 $1 >= 0 && $1 <= 255 &&
345 $2 >= 0 && $2 <= 255 &&
346 $3 >= 0 && $3 <= 255 &&
347 $4 >= 0 && $4 <= 255;
350 =head2 check_ip6address(ip)
352 Check if some IPv6 address is properly formatted, and returns 1 if so.
357 my @blocks = split(/:/, $_[0]);
358 return 0 if (@blocks == 0 || @blocks > 8);
360 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
361 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
362 # value is in [0;128].
364 my $where = index($blocks[$ib],"/");
367 my $b = substr($blocks[$ib],0,$where);
368 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
372 # The netmask must take its value in [0;128]
373 return 0 if ($m <0 || $m >128);
375 # Check the different blocks of the address : 16 bits block in hexa notation.
376 # Possibility of 1 empty block or 2 if the address begins with "::".
379 foreach $b (@blocks) {
380 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
381 $empty++ if ($b eq "");
383 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
389 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
391 Prints HTML for an icon image. The parameters are :
393 =item image - URL for the image, like images/foo.gif
395 =item title - Text to appear under the icon
397 =item link - Optional destination for the icon's link
399 =item href - Other HTML attributes to be added to the <a href> for the link
401 =item width - Optional width of the icon
403 =item height - Optional height of the icon
405 =item before-title - HTML to appear before the title link, but which is not actually in the link
407 =item after-title - HTML to appear after the title link, but which is not actually in the link
412 &load_theme_library();
413 if (defined(&theme_generate_icon)) {
414 &theme_generate_icon(@_);
417 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
418 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
419 if ($tconfig{'noicons'}) {
421 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
424 print "$_[6]$_[1]$_[7]\n";
428 print "<table border><tr><td width=48 height=48>\n",
429 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
430 "$w $h></a></td></tr></table>\n";
431 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
434 print "<table border><tr><td width=48 height=48>\n",
435 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
436 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
442 Converts a string to a form ok for putting in a URL, using % escaping.
448 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
452 =head2 un_urlize(string)
454 Converts a URL-encoded string to it's original contents - the reverse of the
462 $rv =~ s/%(..)/pack("c",hex($1))/ge;
466 =head2 include(filename)
468 Read and output the contents of the given file.
474 open(INCLUDE, &translate_filename($_[0])) || return 0;
482 =head2 copydata(in-handle, out-handle)
484 Read from one file handle and write to another, until there is no more to read.
490 $in = &callers_package($in);
491 $out = &callers_package($out);
493 while(read($in, $buf, 1024) > 0) {
494 (print $out $buf) || return 0;
499 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
501 Read data submitted via a POST request using the multipart/form-data coding,
502 and store it in the global %in hash. The optional parameters are :
504 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
506 =item cbfunc - A function reference to call after reading each block of data.
508 =item cbargs - Additional parameters to the callback function.
513 my ($max, $cbfunc, $cbargs) = @_;
514 my ($boundary, $line, $foo, $name, $got, $file);
515 my $err = &text('readparse_max', $max);
516 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
517 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
520 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
522 <STDIN>; # skip first boundary
525 # Read section headers
529 $got += length($line);
530 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
531 if ($max && $got > $max) {
536 if ($line =~ /^(\S+):\s*(.*)$/) {
537 $header{$lastheader = lc($1)} = $2;
539 elsif ($line =~ /^\s+(.*)$/) {
540 $header{$lastheader} .= $line;
544 # Parse out filename and type
545 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
547 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
552 $foo = $name . "_$1";
559 &error($text{'readparse_cdheader'});
561 if ($header{'content-type'} =~ /^([^\s;]+)/) {
562 $foo = $name . "_content_type";
565 $file = $in{$name."_filename"};
568 $in{$name} .= "\0" if (defined($in{$name}));
571 $got += length($line);
572 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
574 if ($max && $got > $max) {
575 #print STDERR "over limit of $max\n";
580 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
585 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
586 if (index($line, $boundary) != -1) { last; }
589 chop($in{$name}); chop($in{$name});
590 if (index($line,"$boundary--") != -1) { last; }
592 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
595 =head2 ReadParse([&hash], [method], [noplus])
597 Fills the given hash reference with CGI parameters, or uses the global hash
598 %in if none is given. Also sets the global variables $in and @in. The other
601 =item method - For use of this HTTP method, such as GET
603 =item noplus - Don't convert + in parameters to spaces.
608 my $a = $_[0] || \%in;
610 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
612 if ($meth eq 'POST') {
613 my $clen = $ENV{'CONTENT_LENGTH'};
614 &read_fully(STDIN, \$in, $clen) == $clen ||
615 &error("Failed to read POST input : $!");
617 if ($ENV{'QUERY_STRING'}) {
618 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
619 else { $in = $ENV{'QUERY_STRING'}; }
621 @in = split(/\&/, $in);
622 foreach my $i (@in) {
623 my ($k, $v) = split(/=/, $i, 2);
628 $k =~ s/%(..)/pack("c",hex($1))/ge;
629 $v =~ s/%(..)/pack("c",hex($1))/ge;
630 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
634 =head2 read_fully(fh, &buffer, length)
636 Read data from some file handle up to the given length, even in the face
637 of partial reads. Reads the number of bytes read. Stores received data in the
638 string pointed to be the buffer reference.
643 my ($fh, $buf, $len) = @_;
644 $fh = &callers_package($fh);
647 my $r = read(STDIN, $$buf, $len-$got, $got);
654 =head2 read_parse_mime_callback(size, totalsize, upload-id)
656 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
657 the file on every 1% change though. For internal use by the upload progress
661 sub read_parse_mime_callback
663 my ($size, $totalsize, $filename, $id) = @_;
664 return if ($gconfig{'no_upload_tracker'});
667 # Create the upload tracking directory - if running as non-root, this has to
668 # be under the user's home
671 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
672 $vardir = "$uinfo[7]/.tmp";
675 $vardir = $ENV{'WEBMIN_VAR'};
678 &make_dir($vardir, 0755);
681 # Remove any upload.* files more than 1 hour old
682 if (!$main::read_parse_mime_callback_flushed) {
684 opendir(UPDIR, $vardir);
685 foreach my $f (readdir(UPDIR)) {
686 next if ($f !~ /^upload\./);
687 my @st = stat("$vardir/$f");
688 if ($st[9] < $now-3600) {
689 unlink("$vardir/$f");
693 $main::read_parse_mime_callback_flushed++;
696 # Only update file once per percent
697 my $upfile = "$vardir/upload.$id";
698 if ($totalsize && $size >= 0) {
699 my $pc = int(100 * $size / $totalsize);
700 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
703 $main::read_parse_mime_callback_pc{$upfile} = $pc;
707 &open_tempfile(UPFILE, ">$upfile");
708 print UPFILE $size,"\n";
709 print UPFILE $totalsize,"\n";
710 print UPFILE $filename,"\n";
711 &close_tempfile(UPFILE);
714 =head2 read_parse_mime_javascript(upload-id, [&fields])
716 Returns an onSubmit= Javascript statement to popup a window for tracking
717 an upload with the given ID. For internal use by the upload progress tracker.
720 sub read_parse_mime_javascript
722 my ($id, $fields) = @_;
723 return "" if ($gconfig{'no_upload_tracker'});
724 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
726 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
727 return "onSubmit='if ($if) { $opener }'";
730 return "onSubmit='$opener'";
734 =head2 PrintHeader(charset)
736 Outputs the HTTP headers for an HTML page. The optional charset parameter
737 can be used to set a character set. Normally this function is not called
738 directly, but is rather called by ui_print_header or header.
743 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
744 print "pragma: no-cache\n";
745 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
746 print "Cache-Control: no-store, no-cache, must-revalidate\n";
747 print "Cache-Control: post-check=0, pre-check=0\n";
749 if (defined($_[0])) {
750 print "Content-type: text/html; Charset=$_[0]\n\n";
753 print "Content-type: text/html\n\n";
757 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
759 Outputs a Webmin HTML page header with a title, including HTTP headers. The
762 =item title - The text to show at the top of the page
764 =item image - An image to show instead of the title text. This is typically left blank.
766 =item help - If set, this is the name of a help page that will be linked to in the title.
768 =item config - If set to 1, the title will contain a link to the module's config page.
770 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
772 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
774 =item rightside - HTML to be shown on the right-hand side of the title. Can contain multiple lines, separated by <br>. Typically this is used for links to stop, start or restart servers.
776 =item head-stuff - HTML to be included in the <head> section of the page.
778 =item body-stuff - HTML attributes to be include in the <body> tag.
780 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
785 return if ($main::done_webmin_header++);
787 my $charset = defined($main::force_charset) ? $main::force_charset
789 &PrintHeader($charset);
790 &load_theme_library();
791 if (defined(&theme_header)) {
792 $module_name = &get_module_name();
794 $miniserv::page_capture = 1;
797 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
800 if (defined(&theme_prehead)) {
804 print "<meta http-equiv=\"Content-Type\" ",
805 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
808 my $title = &get_html_title($_[0]);
809 print "<title>$title</title>\n";
810 print $_[7] if ($_[7]);
811 print &get_html_status_line(0);
813 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
814 if ($tconfig{'headinclude'}) {
815 print &read_file_contents(
816 "$theme_root_directory/$tconfig{'headinclude'}");
819 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
820 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
821 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
822 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
823 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
824 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
825 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
827 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
829 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
830 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
831 if (defined(&theme_prebody)) {
834 my $hostname = &get_display_hostname();
835 my $version = &get_webmin_version();
836 my $prebody = $tconfig{'prebody'};
838 $prebody =~ s/%HOSTNAME%/$hostname/g;
839 $prebody =~ s/%VERSION%/$version/g;
840 $prebody =~ s/%USER%/$remote_user/g;
841 $prebody =~ s/%OS%/$os_type $os_version/g;
844 if ($tconfig{'prebodyinclude'}) {
846 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
853 print $tconfig{'preheader'};
854 my %this_module_info = &get_module_info(&get_module_name());
855 print "<table class='header' width=100%><tr>\n";
856 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
857 print "<td id='headln1' colspan=3 align=center>\n";
858 print &get_html_status_line(1);
859 print "</td></tr> <tr>\n";
861 print "<td id='headln2l' width=15% valign=top align=left>";
862 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
863 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
864 "$text{'header_servers'}</a><br>\n";
866 if (!$_[5] && !$tconfig{'noindex'}) {
867 my @avail = &get_available_module_infos(1);
868 my $nolo = $ENV{'ANONYMOUS_USER'} ||
869 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
870 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
871 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
873 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
874 "$text{'main_logout'}</a><br>";
876 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
877 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
878 "$text{'main_switch'}</a><br>";
880 elsif (!$gconfig{'gotoone'} || @avail > 1) {
881 print "<a href='$gconfig{'webprefix'}/?cat=",
882 $this_module_info{'category'},
883 "'>$text{'header_webmin'}</a><br>\n";
886 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
887 my $idx = $this_module_info{'index_link'};
888 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
889 my $mt = $module_index_name || $text{'header_module'};
890 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
892 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
893 !$tconfig{'nohelp'}) {
894 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
897 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
898 !$tconfig{'nohelp'}) {
899 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
902 my %access = &get_module_acl();
903 if (!$access{'noconfig'} && !$config{'noprefs'}) {
904 my $cprog = $user_module_config_directory ?
905 "uconfig.cgi" : "config.cgi";
906 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
907 &get_module_name()."\">",
908 $text{'header_config'},"</a><br>\n";
913 # Title is a single image
914 print "<td id='headln2c' align=center width=70%>",
915 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
919 my $ts = defined($tconfig{'titlesize'}) ?
920 $tconfig{'titlesize'} : "+2";
921 print "<td id='headln2c' align=center width=70%>",
922 ($ts ? "<font size=$ts>" : ""),$_[0],
923 ($ts ? "</font>" : "");
924 print "<br>$_[9]\n" if ($_[9]);
927 print "<td id='headln2r' width=15% valign=top align=right>";
929 print "</td></tr></table>\n";
930 print $tconfig{'postheader'};
932 $miniserv::page_capture = 1;
935 =head2 get_html_title(title)
937 Returns the full string to appear in the HTML <title> block.
944 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
945 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
946 my $host = &get_display_hostname();
947 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
948 $title = sprintf "%s : %s on %s (%s %s)\n",
949 $msg, $remote_user, $host,
950 $os_type, $os_version;
952 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
953 $title = sprintf "%s on %s (%s %s)\n",
955 $os_type, $os_version;
960 if ($gconfig{'showlogin'} && $remote_user) {
961 $title = $remote_user.($title ? " : ".$title : "");
963 if ($gconfig{'showhost'}) {
964 $title = $host.($title ? " : ".$title : "");
969 =head2 get_html_framed_title
971 Returns the title text for a framed theme main page.
974 sub get_html_framed_title
977 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
978 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
980 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
981 # Alternate title mode requested
982 $title = sprintf "%s on %s (%s %s)\n",
983 $remote_user, &get_display_hostname(),
984 $os_type, $os_version;
987 # Title like 'Webmin x.yy on hostname (Linux 6)'
988 if ($os_version eq "*") {
992 $ostr = "$os_type $os_version";
994 my $host = &get_display_hostname();
995 my $ver = &get_webmin_version();
996 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
997 $gconfig{'showhost'} ? &text('main_title3', $ver, $ostr) :
998 &text('main_title', $ver, $host, $ostr);
999 if ($gconfig{'showlogin'}) {
1000 $title = $remote_user.($title ? " : ".$title : "");
1002 if ($gconfig{'showhost'}) {
1003 $title = $host.($title ? " : ".$title : "");
1009 =head2 get_html_status_line(text-only)
1011 Returns HTML for a script block that sets the status line, or if text-only
1012 is set to 1, just return the status line text.
1015 sub get_html_status_line
1017 my ($textonly) = @_;
1018 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
1019 # Disabled in this mode
1022 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
1023 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
1024 my $line = &text('header_statusmsg',
1025 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
1027 ($ENV{'SSL_USER'} ? " (SSL certified)" :
1028 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1029 $text{'programname'},
1030 &get_webmin_version(),
1031 &get_display_hostname(),
1032 $os_type.($os_version eq "*" ? "" :" $os_version"));
1037 $line =~ s/\r|\n//g;
1038 return "<script language=JavaScript type=text/javascript>\n".
1039 "defaultStatus=\""."e_escape($line)."\";\n".
1044 =head2 popup_header([title], [head-stuff], [body-stuff], [no-body])
1046 Outputs a page header, suitable for a popup window. If no title is given,
1047 absolutely no decorations are output. Also useful in framesets. The parameters
1050 =item title - Title text for the popup window.
1052 =item head-stuff - HTML to appear in the <head> section.
1054 =item body-stuff - HTML attributes to be include in the <body> tag.
1056 =item no-body - If set to 1, don't generate a body tag
1061 return if ($main::done_webmin_header++);
1063 my $charset = defined($main::force_charset) ? $main::force_charset
1065 &PrintHeader($charset);
1066 &load_theme_library();
1067 if (defined(&theme_popup_header)) {
1068 &theme_popup_header(@_);
1069 $miniserv::page_capture = 1;
1072 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1075 if (defined(&theme_popup_prehead)) {
1076 &theme_popup_prehead(@_);
1078 print "<title>$_[0]</title>\n";
1080 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1081 if ($tconfig{'headinclude'}) {
1082 print &read_file_contents(
1083 "$theme_root_directory/$tconfig{'headinclude'}");
1086 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1087 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1088 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1089 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1090 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1091 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1092 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1095 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1096 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1097 if (defined(&theme_popup_prebody)) {
1098 &theme_popup_prebody(@_);
1101 $miniserv::page_capture = 1;
1104 =head2 footer([page, name]+, [noendbody])
1106 Outputs the footer for a Webmin HTML page, possibly with links back to other
1107 pages. The links are specified by pairs of parameters, the first of which is
1108 a link destination, and the second the link text. For example :
1110 footer('/', 'Webmin index', '', 'Module menu');
1115 $miniserv::page_capture = 0;
1116 &load_theme_library();
1117 my %this_module_info = &get_module_info(&get_module_name());
1118 if (defined(&theme_footer)) {
1119 $module_name = &get_module_name(); # Old themes use these
1120 %module_info = %this_module_info;
1124 for(my $i=0; $i+1<@_; $i+=2) {
1126 if ($url ne '/' || !$tconfig{'noindex'}) {
1128 $url = "/?cat=$this_module_info{'category'}";
1130 elsif ($url eq '' && &get_module_name()) {
1131 $url = "/".&get_module_name()."/".
1132 $this_module_info{'index_link'};
1134 elsif ($url =~ /^\?/ && &get_module_name()) {
1135 $url = "/".&get_module_name()."/$url";
1137 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1139 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1144 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1149 my $postbody = $tconfig{'postbody'};
1151 my $hostname = &get_display_hostname();
1152 my $version = &get_webmin_version();
1153 my $os_type = $gconfig{'real_os_type'} ||
1154 $gconfig{'os_type'};
1155 my $os_version = $gconfig{'real_os_version'} ||
1156 $gconfig{'os_version'};
1157 $postbody =~ s/%HOSTNAME%/$hostname/g;
1158 $postbody =~ s/%VERSION%/$version/g;
1159 $postbody =~ s/%USER%/$remote_user/g;
1160 $postbody =~ s/%OS%/$os_type $os_version/g;
1161 print "$postbody\n";
1163 if ($tconfig{'postbodyinclude'}) {
1165 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1171 if (defined(&theme_postbody)) {
1172 &theme_postbody(@_);
1174 print "</body></html>\n";
1178 =head2 popup_footer([no-body])
1180 Outputs html for a footer for a popup window, started by popup_header.
1185 $miniserv::page_capture = 0;
1186 &load_theme_library();
1187 if (defined(&theme_popup_footer)) {
1188 &theme_popup_footer(@_);
1197 =head2 load_theme_library
1199 Immediately loads the current theme's theme.pl file. Not generally useful for
1200 most module developers, as this is called automatically by the header function.
1203 sub load_theme_library
1205 return if (!$current_theme || $loaded_theme_library++);
1206 for(my $i=0; $i<@theme_root_directories; $i++) {
1207 if ($theme_configs[$i]->{'functions'}) {
1208 do $theme_root_directories[$i]."/".
1209 $theme_configs[$i]->{'functions'};
1214 =head2 redirect(url)
1216 Output HTTP headers to redirect the browser to some page. The url parameter is
1217 typically a relative URL like index.cgi or list_users.cgi.
1222 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1223 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1224 ":$ENV{'SERVER_PORT'}";
1225 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1226 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1228 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1229 # Absolute URL (like http://...)
1232 elsif ($_[0] =~ /^\//) {
1233 # Absolute path (like /foo/bar.cgi)
1234 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1236 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1237 # Relative URL (like foo.cgi)
1238 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1241 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1243 &load_theme_library();
1244 if (defined(&theme_redirect)) {
1245 $module_name = &get_module_name(); # Old themes use these
1246 %module_info = &get_module_info($module_name);
1247 &theme_redirect($_[0], $url);
1250 print "Location: $url\n\n";
1254 =head2 kill_byname(name, signal)
1256 Finds a process whose command line contains the given name (such as httpd), and
1257 sends some signal to it. The signal can be numeric (like 9) or named
1263 my @pids = &find_byname($_[0]);
1264 return scalar(@pids) if (&is_readonly_mode());
1265 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1266 if ($gconfig{'debug_what_procs'});
1267 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1271 =head2 kill_byname_logged(name, signal)
1273 Like kill_byname, but also logs the killing.
1276 sub kill_byname_logged
1278 my @pids = &find_byname($_[0]);
1279 return scalar(@pids) if (&is_readonly_mode());
1280 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1284 =head2 find_byname(name)
1286 Finds processes searching for the given name in their command lines, and
1287 returns a list of matching PIDs.
1292 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1293 # Linux with /proc filesystem .. use cmdline files, as this is
1294 # faster than forking
1296 opendir(PROCDIR, "/proc");
1297 foreach my $f (readdir(PROCDIR)) {
1298 if ($f eq int($f) && $f != $$) {
1299 my $line = &read_file_contents("/proc/$f/cmdline");
1300 if ($line =~ /$_[0]/) {
1309 if (&foreign_check("proc")) {
1310 # Call the proc module
1311 &foreign_require("proc", "proc-lib.pl");
1312 if (defined(&proc::list_processes)) {
1313 my @procs = &proc::list_processes();
1315 foreach my $p (@procs) {
1316 if ($p->{'args'} =~ /$_[0]/) {
1317 push(@pids, $p->{'pid'});
1320 @pids = grep { $_ != $$ } @pids;
1325 # Fall back to running a command
1327 $cmd = $gconfig{'find_pid_command'};
1328 $cmd =~ s/NAME/"$_[0]"/g;
1329 $cmd = &translate_command($cmd);
1330 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1331 @pids = grep { $_ != $$ } @pids;
1335 =head2 error([message]+)
1337 Display an error message and exit. This should be used by CGI scripts that
1338 encounter a fatal error or invalid user input to notify users of the problem.
1339 If error_setup has been called, the displayed error message will be prefixed
1340 by the message setup using that function.
1345 $main::no_miniserv_userdb = 1;
1346 my $msg = join("", @_);
1347 $msg =~ s/<[^>]*>//g;
1348 if (!$main::error_must_die) {
1349 print STDERR "Error: ",$msg,"\n";
1351 &load_theme_library();
1352 if ($main::error_must_die) {
1353 if ($gconfig{'error_stack'}) {
1354 print STDERR "Error: ",$msg,"\n";
1355 for(my $i=0; my @stack = caller($i); $i++) {
1356 print STDERR "File: $stack[1] Line: $stack[2] ",
1357 "Function: $stack[3]\n";
1362 elsif (!$ENV{'REQUEST_METHOD'}) {
1363 # Show text-only error
1364 print STDERR "$text{'error'}\n";
1365 print STDERR "-----\n";
1366 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1368 print STDERR "-----\n";
1369 if ($gconfig{'error_stack'}) {
1371 print STDERR $text{'error_stack'},"\n";
1372 for(my $i=0; my @stack = caller($i); $i++) {
1373 print STDERR &text('error_stackline',
1374 $stack[1], $stack[2], $stack[3]),"\n";
1379 elsif (defined(&theme_error)) {
1383 &header($text{'error'}, "");
1385 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1387 if ($gconfig{'error_stack'}) {
1389 print "<h3>$text{'error_stack'}</h3>\n";
1391 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1392 "<td><b>$text{'error_line'}</b></td> ",
1393 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1394 for($i=0; my @stack = caller($i); $i++) {
1396 print "<td>$stack[1]</td>\n";
1397 print "<td>$stack[2]</td>\n";
1398 print "<td>$stack[3]</td>\n";
1404 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1405 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1411 &unlock_all_files();
1412 &cleanup_tempnames();
1416 =head2 popup_error([message]+)
1418 This function is almost identical to error, but displays the message with HTML
1419 headers suitable for a popup window.
1424 $main::no_miniserv_userdb = 1;
1425 &load_theme_library();
1426 if ($main::error_must_die) {
1429 elsif (defined(&theme_popup_error)) {
1430 &theme_popup_error(@_);
1433 &popup_header($text{'error'}, "");
1434 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1437 &unlock_all_files();
1438 &cleanup_tempnames();
1442 =head2 error_setup(message)
1444 Registers a message to be prepended to all error messages displayed by the
1450 $main::whatfailed = $_[0];
1453 =head2 wait_for(handle, regexp, regexp, ...)
1455 Reads from the input stream until one of the regexps matches, and returns the
1456 index of the matching regexp, or -1 if input ended before any matched. This is
1457 very useful for parsing the output of interactive programs, and can be used with
1458 a two-way pipe to feed input to a program in response to output matched by
1461 If the matching regexp contains bracketed sub-expressions, their values will
1462 be placed in the global array @matches, indexed starting from 1. You cannot
1463 use the Perl variables $1, $2 and so on to capture matches.
1467 $rv = wait_for($loginfh, "username:");
1469 error("Didn't get username prompt");
1471 print $loginfh "joe\n";
1472 $rv = wait_for($loginfh, "password:");
1474 error("Didn't get password prompt");
1476 print $loginfh "smeg\n";
1481 my ($c, $i, $sw, $rv, $ha);
1482 undef($wait_for_input);
1483 if ($wait_for_debug) {
1484 print STDERR "wait_for(",join(",", @_),")\n";
1486 $ha = &callers_package($_[0]);
1487 if ($wait_for_debug) {
1488 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1493 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1494 " \$wait_for_input .= \$c;\n";
1495 if ($wait_for_debug) {
1496 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1498 for($i=1; $i<@_; $i++) {
1499 $sw = $i>1 ? "elsif" : "if";
1500 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1503 " if (defined(\$hit)) {\n".
1504 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1510 &error("wait_for error : $@\n");
1515 =head2 fast_wait_for(handle, string, string, ...)
1517 This function behaves very similar to wait_for (documented above), but instead
1518 of taking regular expressions as parameters, it takes strings. As soon as the
1519 input contains one of them, it will return the index of the matching string.
1520 If the input ends before any match, it returns -1.
1525 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1526 for($i=1; $i<@_; $i++) {
1527 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1531 if (($c = getc($ha)) eq "") {
1532 &error("fast_wait_for read error : $!");
1535 if (length($inp) > $maxlen) {
1536 $inp = substr($inp, length($inp)-$maxlen);
1538 $inpl = length($inp);
1539 for($i=1; $i<@_; $i++) {
1540 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1547 =head2 has_command(command)
1549 Returns the full path to the executable if some command is in the path, or
1550 undef if not found. If the given command is already an absolute path and
1551 exists, then the same path will be returned.
1556 if (!$_[0]) { return undef; }
1557 if (exists($main::has_command_cache{$_[0]})) {
1558 return $main::has_command_cache{$_[0]};
1561 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1562 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1563 # Absolute path given - just use it
1564 my $t = &translate_filename($_[0]);
1565 $rv = (-x $t && !-d _) ? $_[0] : undef;
1568 # Check each directory in the path
1570 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1571 next if ($donedir{$d}++);
1572 $d =~ s/$slash$// if ($d ne $slash);
1573 my $t = &translate_filename("$d/$_[0]");
1574 if (-x $t && !-d _) {
1575 $rv = $d.$slash.$_[0];
1578 if ($gconfig{'os_type'} eq 'windows') {
1579 foreach my $sfx (".exe", ".com", ".bat") {
1580 my $t = &translate_filename("$d/$_[0]").$sfx;
1581 if (-r $t && !-d _) {
1582 $rv = $d.$slash.$_[0].$sfx;
1589 $main::has_command_cache{$_[0]} = $rv;
1593 =head2 make_date(seconds, [date-only], [fmt])
1595 Converts a Unix date/time in seconds to a human-readable form, by default
1596 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1598 =item seconds - Unix time is seconds to convert.
1600 =item date-only - If set to 1, exclude the time from the returned string.
1602 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1607 my ($secs, $only, $fmt) = @_;
1608 my @tm = localtime($secs);
1611 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1613 if ($fmt eq 'dd/mon/yyyy') {
1614 $date = sprintf "%2.2d/%s/%4.4d",
1615 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1617 elsif ($fmt eq 'dd/mm/yyyy') {
1618 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1620 elsif ($fmt eq 'mm/dd/yyyy') {
1621 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1623 elsif ($fmt eq 'yyyy/mm/dd') {
1624 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1626 elsif ($fmt eq 'd. mon yyyy') {
1627 $date = sprintf "%d. %s %4.4d",
1628 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1630 elsif ($fmt eq 'dd.mm.yyyy') {
1631 $date = sprintf "%2.2d.%2.2d.%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1633 elsif ($fmt eq 'yyyy-mm-dd') {
1634 $date = sprintf "%4.4d-%2.2d-%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1637 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1642 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1644 Return HTML for a button that pops up a file chooser when clicked, and places
1645 the selected filename into another HTML field. The parameters are :
1647 =item input - Name of the form field to store the filename in.
1649 =item type - 0 for file or directory chooser, or 1 for directory only.
1651 =item form - Index of the form containing the button.
1653 =item chroot - If set to 1, the chooser will be limited to this directory.
1655 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1658 sub file_chooser_button
1660 return &theme_file_chooser_button(@_)
1661 if (defined(&theme_file_chooser_button));
1662 my $form = defined($_[2]) ? $_[2] : 0;
1663 my $chroot = defined($_[3]) ? $_[3] : "/";
1664 my $add = int($_[4]);
1665 my ($w, $h) = (400, 300);
1666 if ($gconfig{'db_sizefile'}) {
1667 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1669 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/chooser.cgi?add=$add&type=$_[1]&chroot=$chroot&file=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=no,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
1672 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1674 Returns HTML for a button that will popup a chooser window of some kind. The
1677 =item url - Base URL of the popup window's contents
1679 =item width - Width of the window in pixels
1681 =item height - Height in pixels
1683 =item scrollbars - Set to 1 if the window should have scrollbars
1685 The field-mappings parameter is an array ref of array refs containing
1687 =item - Attribute to assign field to in the popup window
1689 =item - Form field name
1691 =item - CGI parameter to URL for value, if any
1694 sub popup_window_button
1696 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1697 my ($url, $w, $h, $scroll, $fields) = @_;
1698 my $scrollyn = $scroll ? "yes" : "no";
1699 my $rv = "<input type=button onClick='";
1700 foreach my $m (@$fields) {
1701 $rv .= "$m->[0] = form.$m->[1]; ";
1703 my $sep = $url =~ /\?/ ? "&" : "?";
1704 $rv .= "chooser = window.open(\"$url\"";
1705 foreach my $m (@$fields) {
1707 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1711 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1712 foreach my $m (@$fields) {
1713 $rv .= "chooser.$m->[0] = $m->[0]; ";
1714 $rv .= "window.$m->[0] = $m->[0]; ";
1716 $rv .= "' value=\"...\">";
1720 =head2 read_acl(&user-module-hash, &user-list-hash, [&only-users])
1722 Reads the Webmin acl file into the given hash references. The first is indexed
1723 by a combined key of username,module , with the value being set to 1 when
1724 the user has access to that module. The second is indexed by username, with
1725 the value being an array ref of allowed modules.
1727 This function is deprecated in favour of foreign_available, which performs a
1728 more comprehensive check of module availability.
1730 If the only-users array ref parameter is given, the results may be limited to
1731 users in that list of names.
1736 my ($usermod, $userlist, $only) = @_;
1737 if (!%main::acl_hash_cache) {
1738 # Read from local files
1740 open(ACL, &acl_filename());
1742 if (/^([^:]+):\s*(.*)/) {
1744 my @mods = split(/\s+/, $2);
1745 foreach my $m (@mods) {
1746 $main::acl_hash_cache{$user,$m}++;
1748 $main::acl_array_cache{$user} = \@mods;
1753 %$usermod = %main::acl_hash_cache if ($usermod);
1754 %$userlist = %main::acl_array_cache if ($userlist);
1757 my $userdb = &get_userdb_string();
1758 my ($dbh, $proto, $prefix, $args) =
1759 $userdb ? &connect_userdb($userdb) : ( );
1761 if ($proto eq "mysql" || $proto eq "postgresql") {
1762 # Select usernames and modules from SQL DB
1763 my $cmd = $dbh->prepare(
1764 "select webmin_user.name,webmin_user_attr.value ".
1765 "from webmin_user,webmin_user_attr ".
1766 "where webmin_user.id = webmin_user_attr.id ".
1767 "and webmin_user_attr.attr = 'modules' ".
1768 ($only ? " and webmin_user.name in (".
1769 join(",", map { "'$_'" } @$only).")" : ""));
1770 if ($cmd && $cmd->execute()) {
1771 while(my ($user, $mods) = $cmd->fetchrow()) {
1772 my @mods = split(/\s+/, $mods);
1773 foreach my $m (@mods) {
1774 $usermod->{$user,$m}++ if ($usermod);
1776 $userlist->{$user} = \@mods if ($userlist);
1779 $cmd->finish() if ($cmd);
1781 elsif ($proto eq "ldap") {
1782 # Find users in LDAP
1783 my $filter = '(objectClass='.$args->{'userclass'}.')';
1786 "(|".join("", map { "(cn=$_)" } @$only).")";
1787 $filter = "(&".$filter.$ufilter.")";
1789 my $rv = $dbh->search(
1793 attrs => [ 'cn', 'webminModule' ]);
1794 if ($rv && !$rv->code) {
1795 foreach my $u ($rv->all_entries) {
1796 my $user = $u->get_value('cn');
1797 my @mods =$u->get_value('webminModule');
1798 foreach my $m (@mods) {
1799 $usermod->{$user,$m}++ if ($usermod);
1801 $userlist->{$user} = \@mods if ($userlist);
1805 &disconnect_userdb($userdb, $dbh);
1811 Returns the file containing the webmin ACL, which is usually
1812 /etc/webmin/webmin.acl.
1817 return "$config_directory/webmin.acl";
1822 Does nothing, but kept around for compatability.
1829 =head2 get_miniserv_config(&hash)
1831 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1832 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1836 sub get_miniserv_config
1838 return &read_file_cached(
1839 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1842 =head2 put_miniserv_config(&hash)
1844 Writes out the Webmin webserver configuration file from the contents of
1845 the given hash ref. This should be initially populated by get_miniserv_config,
1848 get_miniserv_config(\%miniserv);
1849 $miniserv{'port'} = 10005;
1850 put_miniserv_config(\%miniserv);
1854 sub put_miniserv_config
1856 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1860 =head2 restart_miniserv([nowait])
1862 Kill the old miniserv process and re-start it, then optionally waits for
1863 it to restart. This will apply all configuration settings.
1866 sub restart_miniserv
1869 return undef if (&is_readonly_mode());
1871 &get_miniserv_config(\%miniserv) || return;
1874 if ($gconfig{'os_type'} ne 'windows') {
1875 # On Unix systems, we can restart with a signal
1876 my ($pid, $addr, $i);
1877 $miniserv{'inetd'} && return;
1878 my @oldst = stat($miniserv{'pidfile'});
1879 $pid = $ENV{'MINISERV_PID'};
1881 open(PID, $miniserv{'pidfile'}) ||
1882 &error("Failed to open PID file $miniserv{'pidfile'}");
1885 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1888 # Just signal miniserv to restart
1889 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1891 # Wait till new PID is written, indicating a restart
1892 for($i=0; $i<60; $i++) {
1894 my @newst = stat($miniserv{'pidfile'});
1895 last if ($newst[9] != $oldst[9]);
1897 $i < 60 || &error("Webmin server did not write new PID file");
1899 ## Totally kill the process and re-run it
1900 #$SIG{'TERM'} = 'IGNORE';
1901 #&kill_logged('TERM', $pid);
1902 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1905 # On Windows, we need to use the flag file
1906 open(TOUCH, ">$miniserv{'restartflag'}");
1911 # Wait for miniserv to come back up
1912 my $addr = $miniserv{'bind'} || "127.0.0.1";
1914 for($i=0; $i<20; $i++) {
1917 &open_socket($addr, $miniserv{'port'}, STEST, \$err);
1919 last if (!$err && ++$ok >= 2);
1921 $i < 20 || &error("Failed to restart Webmin server!");
1925 =head2 reload_miniserv
1927 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1928 configuration files. Not all changes will be applied though, such as the
1929 IP addresses and ports to accept connections on.
1934 return undef if (&is_readonly_mode());
1936 &get_miniserv_config(\%miniserv) || return;
1938 if ($gconfig{'os_type'} ne 'windows') {
1939 # Send a USR1 signal to re-read the config
1940 my ($pid, $addr, $i);
1941 $miniserv{'inetd'} && return;
1942 $pid = $ENV{'MINISERV_PID'};
1944 open(PID, $miniserv{'pidfile'}) ||
1945 &error("Failed to open PID file $miniserv{'pidfile'}");
1948 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1950 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1952 # Make sure this didn't kill Webmin!
1954 if (!kill(0, $pid)) {
1955 print STDERR "USR1 signal killed Webmin - restarting\n";
1956 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1960 # On Windows, we need to use the flag file
1961 open(TOUCH, ">$miniserv{'reloadflag'}");
1966 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1968 Returns 1 if some module is supported on the current operating system, or the
1969 OS supplies as parameters. The parameters are :
1971 =item minfo - A hash ref of module information, as returned by get_module_info
1973 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1975 =item os-version - The Webmin OS version to use, such as 13.0
1977 =item api-only - If set to 1, considers a module supported if it provides an API to other modules on this OS, even if the majority of its functionality is not supported.
1980 sub check_os_support
1982 my $oss = $_[0]->{'os_support'};
1983 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1984 # May provide usable API
1985 $oss .= " ".$_[0]->{'api_os_support'};
1987 if ($_[0]->{'nozone'} && &running_in_zone()) {
1988 # Not supported in a Solaris Zone
1991 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1992 # Not supported in a Linux Vserver
1995 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1996 # Not supported in an OpenVZ container
1999 return 1 if (!$oss || $oss eq '*');
2000 my $osver = $_[2] || $gconfig{'os_version'};
2001 my $ostype = $_[1] || $gconfig{'os_type'};
2004 my ($os, $ver, $codes);
2005 my ($neg) = ($oss =~ s/^!//); # starts with !
2006 $anyneg++ if ($neg);
2007 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2009 $os = $1; $ver = $2; $codes = $3; $oss = $4;
2011 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
2013 $os = $1; $ver = $2; $oss = $3;
2015 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
2017 $os = $1; $codes = $2; $oss = $3;
2019 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
2021 $codes = $1; $oss = $2;
2023 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
2025 $os = $1; $oss = $2;
2028 next if ($os && !($os eq $ostype ||
2029 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
2030 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
2031 next if ($osver < $1 || $osver > $2);
2033 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
2034 next if ($osver < $1);
2036 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
2037 next if ($osver > $1);
2040 next if ($ver ne $osver);
2042 next if ($codes && !eval $codes);
2048 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2050 Downloads data from a HTTP url to a local file or string. The parameters are :
2052 =item host - The hostname part of the URL, such as www.google.com
2054 =item port - The HTTP port number, such as 80
2056 =item page - The filename part of the URL, like /index.html
2058 =item destfile - The local file to save the URL data to, like /tmp/index.html. This can also be a scalar reference, in which case the data will be appended to that scalar.
2060 =item error - If set to a scalar ref, the function will store any error message in this scalar and return 0 on failure, or 1 on success. If not set, it will simply call the error function if the download fails.
2062 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2064 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2066 =item user - If set, HTTP authentication is done with this username.
2068 =item pass - The HTTP password to use with the username above.
2070 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2072 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2074 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2076 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2081 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2082 $timeout, $osdn, $nocache, $headers) = @_;
2083 if ($gconfig{'debug_what_net'}) {
2084 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2085 ($user ? " user=$user pass=$pass" : "").
2086 (ref($dest) ? "" : " dest=$dest"));
2089 # Convert OSDN URL first
2090 my $prot = $ssl ? "https://" : "http://";
2091 my $portstr = $ssl && $port == 443 ||
2092 !$ssl && $port == 80 ? "" : ":$port";
2093 ($host, $port, $page, $ssl) = &parse_http_url(
2094 &convert_osdn_url($prot.$host.$portstr.$page));
2097 # Check if we already have cached the URL
2098 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2099 my $cfile = &check_in_http_cache($url);
2100 if ($cfile && !$nocache) {
2101 # Yes! Copy to dest file or variable
2102 &$cbfunc(6, $url) if ($cbfunc);
2104 &open_readfile(CACHEFILE, $cfile);
2106 $$dest = <CACHEFILE>;
2110 ©_source_dest($cfile, $dest);
2117 push(@headers, [ "Host", $host ]);
2118 push(@headers, [ "User-agent", "Webmin" ]);
2119 push(@headers, [ "Accept-language", "en" ]);
2121 my $auth = &encode_base64("$user:$pass");
2122 $auth =~ tr/\r\n//d;
2123 push(@headers, [ "Authorization", "Basic $auth" ]);
2125 foreach my $hname (keys %$headers) {
2126 push(@headers, [ $hname, $headers->{$hname} ]);
2129 # Actually download it
2130 $main::download_timed_out = undef;
2131 local $SIG{ALRM} = \&download_timeout;
2132 alarm($timeout || 60);
2133 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2135 $h = $main::download_timed_out if ($main::download_timed_out);
2137 if ($error) { $$error = $h; return; }
2138 else { &error($h); }
2140 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2141 $headers, $ssl, $nocache);
2142 if ((!$error || !$$error) && !$nocache) {
2143 &write_to_http_cache($url, $dest);
2147 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2149 Do a HTTP download, after the headers have been sent. For internal use only,
2150 typically called by http_download.
2153 sub complete_http_download
2155 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2161 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2162 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2164 if ($_[2]) { ${$_[2]} = $line; return; }
2165 else { &error("Download failed : $line"); }
2168 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2171 $line = &read_http_connection($_[0]);
2172 $line =~ tr/\r\n//d;
2173 $line =~ /^(\S+):\s+(.*)$/ || last;
2174 $header{lc($1)} = $2;
2175 push(@headers, [ lc($1), $2 ]);
2178 if ($main::download_timed_out) {
2179 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2180 else { &error($main::download_timed_out); }
2182 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2183 if ($rcode >= 300 && $rcode < 400) {
2184 # follow the redirect
2185 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2186 my ($host, $port, $page, $ssl);
2187 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2188 $ssl = $1 eq 'https' ? 1 : 0;
2189 $host = $2; $port = $3; $page = $4 || "/";
2191 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2192 $ssl = $1 eq 'https' ? 1 : 0;
2193 $host = $2; $port = 80; $page = $3 || "/";
2195 elsif ($header{'location'} =~ /^\// && $_[5]) {
2196 # Relative to same server
2200 $page = $header{'location'};
2202 elsif ($header{'location'}) {
2203 # Assume relative to same dir .. not handled
2204 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2205 else { &error("Invalid Location header $header{'location'}"); }
2208 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2209 else { &error("Missing Location header"); }
2212 ($page, $params) = split(/\?/, $page);
2214 $page .= "?".$params if (defined($params));
2215 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2216 undef, undef, undef, $_[4], $_[9], $_[7]);
2221 # Append to a variable
2222 while(defined($buf = &read_http_connection($_[0], 1024))) {
2224 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2230 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2231 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2232 else { &error("Failed to write to $_[1] : $!"); }
2234 binmode(PFILE); # For windows
2235 while(defined($buf = &read_http_connection($_[0], 1024))) {
2236 &print_tempfile(PFILE, $buf);
2237 $got += length($buf);
2238 &$cbfunc(3, $got) if ($cbfunc);
2240 &close_tempfile(PFILE);
2241 if ($header{'content-length'} &&
2242 $got != $header{'content-length'}) {
2243 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2244 else { &error("Download incomplete"); }
2247 &$cbfunc(4) if ($cbfunc);
2249 &close_http_connection($_[0]);
2253 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2255 Download data from an FTP site to a local file. The parameters are :
2257 =item host - FTP server hostname
2259 =item file - File on the FTP server to download
2261 =item destfile - File on the Webmin system to download data to
2263 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2265 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2267 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2269 =item pass - Password for the username above.
2271 =item port - FTP server port number, which defaults to 21 if not set.
2276 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2278 if ($gconfig{'debug_what_net'}) {
2279 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2280 ($user ? " user=$user pass=$pass" : "").
2281 (ref($dest) ? "" : " dest=$dest"));
2285 if (&is_readonly_mode()) {
2286 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2288 else { &error("FTP connections not allowed in readonly mode"); }
2291 # Check if we already have cached the URL
2292 my $url = "ftp://".$host.$file;
2293 my $cfile = &check_in_http_cache($url);
2295 # Yes! Copy to dest file or variable
2296 &$cbfunc(6, $url) if ($cbfunc);
2298 &open_readfile(CACHEFILE, $cfile);
2300 $$dest = <CACHEFILE>;
2304 ©_source_dest($cfile, $dest);
2309 # Actually download it
2310 $main::download_timed_out = undef;
2311 local $SIG{ALRM} = \&download_timeout;
2314 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2315 # download through http-style proxy
2317 if (&open_socket($1, $2, "SOCK", \$error)) {
2319 if ($main::download_timed_out) {
2321 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2322 else { &error($main::download_timed_out); }
2324 my $esc = $_[1]; $esc =~ s/ /%20/g;
2325 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2326 my $portstr = $port == 21 ? "" : ":$port";
2327 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2328 print SOCK "User-agent: Webmin\r\n";
2329 if ($gconfig{'proxy_user'}) {
2330 my $auth = &encode_base64(
2331 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2332 $auth =~ tr/\r\n//d;
2333 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2336 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2339 elsif (!$gconfig{'proxy_fallback'}) {
2341 if ($error) { $$error = $main::download_timed_out; return 0; }
2342 else { &error($main::download_timed_out); }
2347 # connect to host and login with real FTP protocol
2348 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2350 if ($main::download_timed_out) {
2351 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2352 else { &error($main::download_timed_out); }
2354 &ftp_command("", 2, $_[3]) || return 0;
2356 # Login as supplied user
2357 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2359 if (int($urv[1]/100) == 3) {
2360 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2364 # Login as anonymous
2365 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2367 if (int($urv[1]/100) == 3) {
2368 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2372 &$cbfunc(1, 0) if ($cbfunc);
2375 # get the file size and tell the callback
2376 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2377 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2378 defined($size) || return 0;
2380 &$cbfunc(2, int($size));
2384 my $pasv = &ftp_command("PASV", 2, $_[3]);
2385 defined($pasv) || return 0;
2386 $pasv =~ /\(([0-9,]+)\)/;
2387 @n = split(/,/ , $1);
2388 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2389 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2390 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2394 &open_tempfile(PFILE, ">$_[2]", 1);
2395 while(read(CON, $buf, 1024) > 0) {
2396 &print_tempfile(PFILE, $buf);
2397 $got += length($buf);
2398 &$cbfunc(3, $got) if ($cbfunc);
2400 &close_tempfile(PFILE);
2402 if ($got != $size) {
2403 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2404 else { &error("Download incomplete"); }
2406 &$cbfunc(4) if ($cbfunc);
2408 &ftp_command("", 2, $_[3]) || return 0;
2412 &ftp_command("QUIT", 2, $_[3]) || return 0;
2416 &write_to_http_cache($url, $dest);
2420 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2422 Upload data from a local file to an FTP site. The parameters are :
2424 =item host - FTP server hostname
2426 =item file - File on the FTP server to write to
2428 =item srcfile - File on the Webmin system to upload data from
2430 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2432 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2434 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2436 =item pass - Password for the username above.
2438 =item port - FTP server port number, which defaults to 21 if not set.
2445 if (&is_readonly_mode()) {
2446 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2448 else { &error("FTP connections not allowed in readonly mode"); }
2451 $main::download_timed_out = undef;
2452 local $SIG{ALRM} = \&download_timeout;
2455 # connect to host and login
2456 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2458 if ($main::download_timed_out) {
2459 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2460 else { &error($main::download_timed_out); }
2462 &ftp_command("", 2, $_[3]) || return 0;
2464 # Login as supplied user
2465 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2467 if (int($urv[1]/100) == 3) {
2468 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2472 # Login as anonymous
2473 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2475 if (int($urv[1]/100) == 3) {
2476 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2480 &$cbfunc(1, 0) if ($cbfunc);
2482 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2484 # get the file size and tell the callback
2485 my @st = stat($_[2]);
2487 &$cbfunc(2, $st[7]);
2491 my $pasv = &ftp_command("PASV", 2, $_[3]);
2492 defined($pasv) || return 0;
2493 $pasv =~ /\(([0-9,]+)\)/;
2494 @n = split(/,/ , $1);
2495 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2496 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2501 while(read(PFILE, $buf, 1024) > 0) {
2503 $got += length($buf);
2504 &$cbfunc(3, $got) if ($cbfunc);
2508 if ($got != $st[7]) {
2509 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2510 else { &error("Upload incomplete"); }
2512 &$cbfunc(4) if ($cbfunc);
2515 &ftp_command("", 2, $_[3]) || return 0;
2516 &ftp_command("QUIT", 2, $_[3]) || return 0;
2522 =head2 no_proxy(host)
2524 Checks if some host is on the no proxy list. For internal use by the
2525 http_download and ftp_download functions.
2530 my $ip = &to_ipaddress($_[0]);
2531 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2532 return 1 if ($_[0] =~ /\Q$n\E/ ||
2538 =head2 open_socket(host, port, handle, [&error])
2540 Open a TCP connection to some host and port, using a file handle. The
2543 =item host - Hostname or IP address to connect to.
2545 =item port - TCP port number.
2547 =item handle - A file handle name to use for the connection.
2549 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2554 my ($host, $port, $fh, $err) = @_;
2555 $fh = &callers_package($fh);
2557 if ($gconfig{'debug_what_net'}) {
2558 &webmin_debug_log('TCP', "host=$host port=$port");
2561 # Lookup IP address for the host. Try v4 first, and failing that v6
2563 my $proto = getprotobyname("tcp");
2564 if ($ip = &to_ipaddress($host)) {
2565 # Create IPv4 socket and connection
2566 if (!socket($fh, PF_INET(), SOCK_STREAM, $proto)) {
2567 my $msg = "Failed to create socket : $!";
2568 if ($err) { $$err = $msg; return 0; }
2569 else { &error($msg); }
2571 my $addr = inet_aton($ip);
2572 if ($gconfig{'bind_proxy'}) {
2573 # BIND to outgoing IP
2574 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2575 my $msg = "Failed to bind to source address : $!";
2576 if ($err) { $$err = $msg; return 0; }
2577 else { &error($msg); }
2580 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2581 my $msg = "Failed to connect to $host:$port : $!";
2582 if ($err) { $$err = $msg; return 0; }
2583 else { &error($msg); }
2586 elsif ($ip = &to_ip6address($host)) {
2587 # Create IPv6 socket and connection
2588 if (!&supports_ipv6()) {
2589 $msg = "IPv6 connections are not supported";
2590 if ($err) { $$err = $msg; return 0; }
2591 else { &error($msg); }
2593 if (!socket($fh, Socket6::PF_INET6(), SOCK_STREAM, $proto)) {
2594 my $msg = "Failed to create IPv6 socket : $!";
2595 if ($err) { $$err = $msg; return 0; }
2596 else { &error($msg); }
2598 my $addr = inet_pton(Socket6::AF_INET6(), $ip);
2599 if (!connect($fh, pack_sockaddr_in6($port, $addr))) {
2600 my $msg = "Failed to IPv6 connect to $host:$port : $!";
2601 if ($err) { $$err = $msg; return 0; }
2602 else { &error($msg); }
2607 my $msg = "Failed to lookup IP address for $host";
2608 if ($err) { $$err = $msg; return 0; }
2609 else { &error($msg); }
2613 my $old = select($fh);
2619 =head2 download_timeout
2621 Called when a download times out. For internal use only.
2624 sub download_timeout
2626 $main::download_timed_out = "Download timed out";
2629 =head2 ftp_command(command, expected, [&error], [filehandle])
2631 Send an FTP command, and die if the reply is not what was expected. Mainly
2632 for internal use by the ftp_download and ftp_upload functions.
2637 my ($cmd, $expect, $err, $fh) = @_;
2639 $fh = &callers_package($fh);
2642 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2644 print $fh "$cmd\r\n";
2647 if (!($line = <$fh>)) {
2649 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2650 else { &error("Failed to read reply to $what"); }
2652 $line =~ /^(...)(.)(.*)$/;
2655 foreach my $c (@$expect) {
2656 $found++ if (int($1/100) == $c);
2660 $found++ if (int($1/100) == $_[1]);
2664 if ($err) { $$err = "$what failed : $3"; return undef; }
2665 else { &error("$what failed : $3"); }
2670 # Need to skip extra stuff..
2672 if (!($line = <$fh>)) {
2674 if ($$err) { $$err = "Failed to read reply to $what";
2676 else { &error("Failed to read reply to $what"); }
2678 $line =~ /^(....)(.*)$/; $reply .= $2;
2679 if ($1 eq "$rcode ") { last; }
2683 return wantarray ? ($reply, $rcode) : $reply;
2686 =head2 to_ipaddress(hostname)
2688 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2689 it cannot be resolved.
2694 if (&check_ipaddress($_[0])) {
2695 return $_[0]; # Already in v4 format
2697 elsif (&check_ip6address($_[0])) {
2698 return undef; # A v6 address cannot be converted to v4
2701 my $hn = gethostbyname($_[0]);
2702 return undef if (!$hn);
2703 local @ip = unpack("CCCC", $hn);
2704 return join("." , @ip);
2708 =head2 to_ip6address(hostname)
2710 Converts a hostname to IPv6 address, or returns undef if it cannot be resolved.
2715 if (&check_ip6address($_[0])) {
2716 return $_[0]; # Already in v6 format
2718 elsif (&check_ipaddress($_[0])) {
2719 return undef; # A v4 address cannot be v6
2721 elsif (!&supports_ipv6()) {
2722 return undef; # Cannot lookup
2725 # Perform IPv6 DNS lookup
2727 (undef, undef, undef, $inaddr) =
2728 getaddrinfo($_[0], undef, Socket6::AF_INET6(), SOCK_STREAM);
2729 return undef if (!$inaddr);
2731 (undef, $addr) = unpack_sockaddr_in6($inaddr);
2732 return inet_ntop(Socket6::AF_INET6(), $addr);
2736 =head2 to_hostname(ipv4|ipv6-address)
2738 Reverse-resolves an IPv4 or 6 address to a hostname
2744 if (&check_ip6address($addr) && &supports_ipv6()) {
2745 return gethostbyaddr(inet_pton(Socket6::AF_INET6(), $addr),
2746 Socket6::AF_INET6());
2749 return gethostbyaddr(inet_aton($addr), AF_INET);
2753 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2755 Renders a 4-column table of icons. The useful parameters are :
2757 =item links - An array ref of link destination URLs for the icons.
2759 =item titles - An array ref of titles to appear under the icons.
2761 =item icons - An array ref of URLs for icon images.
2763 =item columns - Number of columns to layout the icons with. Defaults to 4.
2768 &load_theme_library();
2769 if (defined(&theme_icons_table)) {
2770 &theme_icons_table(@_);
2774 my $cols = $_[3] ? $_[3] : 4;
2775 my $per = int(100.0 / $cols);
2776 print "<table class='icons_table' width=100% cellpadding=5>\n";
2777 for(my $i=0; $i<@{$_[0]}; $i++) {
2778 if ($i%$cols == 0) { print "<tr>\n"; }
2779 print "<td width=$per% align=center valign=top>\n";
2780 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2781 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2782 $_[7]->[$i], $_[8]->[$i]);
2784 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2786 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2787 print "</tr>\n" if ($need_tr);
2791 =head2 replace_file_line(file, line, [newline]*)
2793 Replaces one line in some file with 0 or more new lines. The parameters are :
2795 =item file - Full path to some file, like /etc/hosts.
2797 =item line - Line number to replace, starting from 0.
2799 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2802 sub replace_file_line
2805 my $realfile = &translate_filename($_[0]);
2806 open(FILE, $realfile);
2809 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2810 else { splice(@lines, $_[1], 1); }
2811 &open_tempfile(FILE, ">$realfile");
2812 &print_tempfile(FILE, @lines);
2813 &close_tempfile(FILE);
2816 =head2 read_file_lines(file, [readonly])
2818 Returns a reference to an array containing the lines from some file. This
2819 array can be modified, and will be written out when flush_file_lines()
2820 is called. The parameters are :
2822 =item file - Full path to the file to read.
2824 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2828 $lref = read_file_lines("/etc/hosts");
2829 push(@$lref, "127.0.0.1 localhost");
2830 flush_file_lines("/etc/hosts");
2836 my ($package, $filename, $line) = caller;
2837 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2839 my $realfile = &translate_filename($_[0]);
2840 if (!$main::file_cache{$realfile}) {
2843 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2844 open(READFILE, $realfile);
2847 $eol = /\r\n$/ ? "\r\n" : "\n";
2853 $main::file_cache{$realfile} = \@lines;
2854 $main::file_cache_noflush{$realfile} = $_[1];
2855 $main::file_cache_eol{$realfile} = $eol || "\n";
2858 # Make read-write if currently readonly
2860 $main::file_cache_noflush{$realfile} = 0;
2863 return $main::file_cache{$realfile};
2866 =head2 flush_file_lines([file], [eol])
2868 Write out to a file previously read by read_file_lines to disk (except
2869 for those marked readonly). The parameters are :
2871 =item file - The file to flush out.
2873 =item eof - End-of-line character for each line. Defaults to \n.
2876 sub flush_file_lines
2880 local $trans = &translate_filename($_[0]);
2881 $main::file_cache{$trans} ||
2882 &error("flush_file_lines called on non-loaded file $trans");
2883 push(@files, $trans);
2886 @files = ( keys %main::file_cache );
2888 foreach my $f (@files) {
2889 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2890 if (!$main::file_cache_noflush{$f}) {
2891 no warnings; # XXX Bareword file handles should go away
2892 &open_tempfile(FLUSHFILE, ">$f");
2893 foreach my $line (@{$main::file_cache{$f}}) {
2894 (print FLUSHFILE $line,$eol) ||
2895 &error(&text("efilewrite", $f, $!));
2897 &close_tempfile(FLUSHFILE);
2899 delete($main::file_cache{$f});
2900 delete($main::file_cache_noflush{$f});
2904 =head2 unflush_file_lines(file)
2906 Clear the internal cache of some given file, previously read by read_file_lines.
2909 sub unflush_file_lines
2911 my $realfile = &translate_filename($_[0]);
2912 delete($main::file_cache{$realfile});
2913 delete($main::file_cache_noflush{$realfile});
2916 =head2 unix_user_input(fieldname, user, [form])
2918 Returns HTML for an input to select a Unix user. By default this is a text
2919 box with a user popup button next to it.
2924 if (defined(&theme_unix_user_input)) {
2925 return &theme_unix_user_input(@_);
2927 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2928 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2931 =head2 unix_group_input(fieldname, user, [form])
2933 Returns HTML for an input to select a Unix group. By default this is a text
2934 box with a group popup button next to it.
2937 sub unix_group_input
2939 if (defined(&theme_unix_group_input)) {
2940 return &theme_unix_group_input(@_);
2942 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2943 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2946 =head2 hlink(text, page, [module], [width], [height])
2948 Returns HTML for a link that when clicked on pops up a window for a Webmin
2949 help page. The parameters are :
2951 =item text - Text for the link.
2953 =item page - Help page code, such as 'intro'.
2955 =item module - Module the help page is in. Defaults to the current module.
2957 =item width - Width of the help popup window. Defaults to 600 pixels.
2959 =item height - Height of the help popup window. Defaults to 400 pixels.
2961 The actual help pages are in each module's help sub-directory, in files with
2967 if (defined(&theme_hlink)) {
2968 return &theme_hlink(@_);
2970 my $mod = $_[2] ? $_[2] : &get_module_name();
2971 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2972 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2973 return "<a onClick='window.open(\"$gconfig{'webprefix'}/help.cgi/$mod/$_[1]\", \"help\", \"toolbar=no,menubar=no,scrollbars=yes,width=$width,height=$height,resizable=yes\"); return false' href=\"$gconfig{'webprefix'}/help.cgi/$mod/$_[1]\">$_[0]</a>";
2976 =head2 user_chooser_button(field, multiple, [form])
2978 Returns HTML for a javascript button for choosing a Unix user or users.
2979 The parameters are :
2981 =item field - Name of the HTML field to place the username into.
2983 =item multiple - Set to 1 if multiple users can be selected.
2985 =item form - Index of the form on the page.
2988 sub user_chooser_button
2990 return undef if (!&supports_users());
2991 return &theme_user_chooser_button(@_)
2992 if (defined(&theme_user_chooser_button));
2993 my $form = defined($_[2]) ? $_[2] : 0;
2994 my $w = $_[1] ? 500 : 300;
2996 if ($_[1] && $gconfig{'db_sizeusers'}) {
2997 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2999 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3000 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3002 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/user_chooser.cgi?multi=$_[1]&user=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
3005 =head2 group_chooser_button(field, multiple, [form])
3007 Returns HTML for a javascript button for choosing a Unix group or groups
3008 The parameters are :
3010 =item field - Name of the HTML field to place the group name into.
3012 =item multiple - Set to 1 if multiple groups can be selected.
3014 =item form - Index of the form on the page.
3017 sub group_chooser_button
3019 return undef if (!&supports_users());
3020 return &theme_group_chooser_button(@_)
3021 if (defined(&theme_group_chooser_button));
3022 my $form = defined($_[2]) ? $_[2] : 0;
3023 my $w = $_[1] ? 500 : 300;
3025 if ($_[1] && $gconfig{'db_sizeusers'}) {
3026 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3028 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3029 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3031 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/group_chooser.cgi?multi=$_[1]&group=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=yes,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
3034 =head2 foreign_check(module, [api-only])
3036 Checks if some other module exists and is supported on this OS. The parameters
3039 =item module - Name of the module to check.
3041 =item api-only - Set to 1 if you just want to check if the module provides an API that others can call, instead of the full web UI.
3046 my ($mod, $api) = @_;
3048 my $mdir = &module_root_directory($mod);
3049 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
3050 return &check_os_support(\%minfo, undef, undef, $api);
3053 =head2 foreign_exists(module)
3055 Checks if some other module exists. The module parameter is the short module
3061 my $mdir = &module_root_directory($_[0]);
3062 return -r "$mdir/module.info";
3065 =head2 foreign_available(module)
3067 Returns 1 if some module is installed, and acessible to the current user. The
3068 module parameter is the module directory name.
3071 sub foreign_available
3073 return 0 if (!&foreign_check($_[0]) &&
3074 !$gconfig{'available_even_if_no_support'});
3075 my %foreign_module_info = &get_module_info($_[0]);
3077 # Check list of allowed modules
3079 &read_acl(\%acl, undef, [ $base_remote_user ]);
3080 return 0 if (!$acl{$base_remote_user,$_[0]} &&
3081 !$acl{$base_remote_user,'*'});
3083 # Check for usermod restrictions
3084 my @usermods = &list_usermods();
3085 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
3087 if (&get_product_name() eq "webmin") {
3088 # Check if the user has any RBAC privileges in this module
3089 if (&supports_rbac($_[0]) &&
3090 &use_rbac_module_acl(undef, $_[0])) {
3091 # RBAC is enabled for this user and module - check if he
3093 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
3094 return 0 if (!$rbacs);
3096 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
3097 # If denying access to modules not specifically allowed by
3098 # RBAC, then prevent access
3103 # Check readonly support
3104 if (&is_readonly_mode()) {
3105 return 0 if (!$foreign_module_info{'readonly'});
3108 # Check if theme vetos
3109 if (defined(&theme_foreign_available)) {
3110 return 0 if (!&theme_foreign_available($_[0]));
3113 # Check if licence module vetos
3114 if ($main::licence_module) {
3115 return 0 if (!&foreign_call($main::licence_module,
3116 "check_module_licence", $_[0]));
3122 =head2 foreign_require(module, [file], [package])
3124 Brings in functions from another module, and places them in the Perl namespace
3125 with the same name as the module. The parameters are :
3127 =item module - The source module's directory name, like sendmail.
3129 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
3131 =item package - Perl package to place the module's functions and global variables in.
3133 If the original module name contains dashes, they will be replaced with _ in
3139 my ($mod, $file, $pkg) = @_;
3140 $pkg ||= $mod || "global";
3141 $pkg =~ s/[^A-Za-z0-9]/_/g;
3144 push(@files, $file);
3148 my %minfo = &get_module_info($mod);
3149 if ($minfo{'library'}) {
3150 @files = split(/\s+/, $minfo{'library'});
3153 @files = ( $mod."-lib.pl" );
3156 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3157 return 1 if (!@files);
3158 foreach my $f (@files) {
3159 $main::done_foreign_require{$pkg,$f}++;
3162 my $mdir = &module_root_directory($mod);
3163 @INC = &unique($mdir, @INC);
3164 -d $mdir || &error("Module $mod does not exist");
3165 if (!&get_module_name() && $mod) {
3168 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3169 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3170 my $code = "package $pkg; ".
3171 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3172 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3173 foreach my $f (@files) {
3174 $code .= "do '$mdir/$f' || die \$@; ";
3177 if (defined($old_fmn)) {
3178 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3181 delete($ENV{'FOREIGN_MODULE_NAME'});
3183 if (defined($old_frd)) {
3184 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3187 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3190 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3194 =head2 foreign_call(module, function, [arg]*)
3196 Call a function in another module. The module parameter is the target module
3197 directory name, function is the perl sub to call, and the remaining parameters
3198 are the arguments. However, unless you need to call a function whose name
3199 is dynamic, it is better to use Perl's cross-module function call syntax
3200 like module::function(args).
3205 my $pkg = $_[0] || "global";
3206 $pkg =~ s/[^A-Za-z0-9]/_/g;
3207 my @args = @_[2 .. @_-1];
3208 $main::foreign_args = \@args;
3209 my @rv = eval <<EOF;
3211 &$_[1](\@{\$main::foreign_args});
3213 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3214 return wantarray ? @rv : $rv[0];
3217 =head2 foreign_config(module, [user-config])
3219 Get the configuration from another module, and return it as a hash. If the
3220 user-config parameter is set to 1, returns the Usermin user-level preferences
3221 for the current user instead.
3226 my ($mod, $uc) = @_;
3229 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3230 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3231 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3234 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3239 =head2 foreign_installed(module, mode)
3241 Checks if the server for some module is installed, and possibly also checks
3242 if the module has been configured by Webmin.
3243 For mode 1, returns 2 if the server is installed and configured for use by
3244 Webmin, 1 if installed but not configured, or 0 otherwise.
3245 For mode 0, returns 1 if installed, 0 if not.
3246 If the module does not provide an install_check.pl script, assumes that
3247 the server is installed.
3250 sub foreign_installed
3252 my ($mod, $configured) = @_;
3253 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3255 return $main::foreign_installed_cache{$mod,$configured};
3259 if (!&foreign_check($mod)) {
3264 my $mdir = &module_root_directory($mod);
3265 if (!-r "$mdir/install_check.pl") {
3266 # Not known, assume OK
3267 $rv = $configured ? 2 : 1;
3270 # Call function to check
3271 &foreign_require($mod, "install_check.pl");
3272 $rv = &foreign_call($mod, "is_installed", $configured);
3275 $main::foreign_installed_cache{$mod,$configured} = $rv;
3280 =head2 foreign_defined(module, function)
3282 Returns 1 if some function is defined in another module. In general, it is
3283 simpler to use the syntax &defined(module::function) instead.
3289 $pkg =~ s/[^A-Za-z0-9]/_/g;
3290 my $func = "${pkg}::$_[1]";
3291 return defined(&$func);
3294 =head2 get_system_hostname([short])
3296 Returns the hostname of this system. If the short parameter is set to 1,
3297 then the domain name is not prepended - otherwise, Webmin will attempt to get
3298 the fully qualified hostname, like foo.example.com.
3301 sub get_system_hostname
3304 if (!$main::get_system_hostname[$m]) {
3305 if ($gconfig{'os_type'} ne 'windows') {
3306 # Try some common Linux hostname files first
3308 if ($gconfig{'os_type'} eq 'redhat-linux') {
3310 &read_env_file("/etc/sysconfig/network", \%nc);
3311 if ($nc{'HOSTNAME'}) {
3312 $fromfile = $nc{'HOSTNAME'};
3315 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3316 my $hn = &read_file_contents("/etc/hostname");
3322 elsif ($gconfig{'os_type'} eq 'open-linux') {
3323 my $hn = &read_file_contents("/etc/HOSTNAME");
3329 elsif ($gconfig{'os_type'} eq 'solaris') {
3330 my $hn = &read_file_contents("/etc/nodename");
3337 # If we found a hostname, use it if value
3338 if ($fromfile && ($m || $fromfile =~ /\./)) {
3340 $fromfile =~ s/\..*$//;
3342 $main::get_system_hostname[$m] = $fromfile;
3346 # Can use hostname command on Unix
3347 &execute_command("hostname", undef,
3348 \$main::get_system_hostname[$m], undef, 0, 1);
3349 chop($main::get_system_hostname[$m]);
3351 eval "use Sys::Hostname";
3353 $main::get_system_hostname[$m] = eval "hostname()";
3355 if ($@ || !$main::get_system_hostname[$m]) {
3356 $main::get_system_hostname[$m] = "UNKNOWN";
3359 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3360 $gconfig{'os_type'} =~ /linux$/ &&
3361 !$gconfig{'no_hostname_f'} && !$_[0]) {
3362 # Try with -f flag to get fully qualified name
3364 my $ex = &execute_command("hostname -f", undef, \$flag,
3367 if ($ex || $flag eq "") {
3368 # -f not supported! We have probably set the
3369 # hostname to just '-f'. Fix the problem
3372 &execute_command("hostname ".
3373 quotemeta($main::get_system_hostname[$m]),
3374 undef, undef, undef, 0, 1);
3378 $main::get_system_hostname[$m] = $flag;
3383 # On Windows, try computername environment variable
3384 return $ENV{'computername'} if ($ENV{'computername'});
3385 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3387 # Fall back to net name command
3388 my $out = `net name 2>&1`;
3389 if ($out =~ /\-+\r?\n(\S+)/) {
3390 $main::get_system_hostname[$m] = $1;
3393 $main::get_system_hostname[$m] = "windows";
3397 return $main::get_system_hostname[$m];
3400 =head2 get_webmin_version
3402 Returns the version of Webmin currently being run, such as 1.450.
3405 sub get_webmin_version
3407 if (!$get_webmin_version) {
3408 open(VERSION, "$root_directory/version") || return 0;
3409 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3412 return $get_webmin_version;
3415 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3417 Returns a hash containing access control options for the given user and module.
3418 By default the current username and module name are used. If the no-rbac flag
3419 is given, the permissions will not be updated based on the user's RBAC role
3420 (as seen on Solaris). If the no-default flag is given, default permissions for
3421 the module will not be included.
3426 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3427 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3428 my $mdir = &module_root_directory($m);
3431 # Read default ACL first, to be overridden by per-user settings
3432 &read_file_cached("$mdir/defaultacl", \%rv);
3434 # If this isn't a master admin user, apply the negative permissions
3435 # so that he doesn't un-expectedly gain access to new features
3437 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3438 if ($gaccess{'negative'}) {
3439 &read_file_cached("$mdir/negativeacl", \%rv);
3443 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3444 # RBAC overrides exist for this user in this module
3445 my $rbac = &get_rbac_module_acl(
3446 defined($_[0]) ? $_[0] : $remote_user, $m);
3447 foreach my $r (keys %$rbac) {
3448 $rv{$r} = $rbac->{$r};
3451 elsif ($gconfig{"risk_$u"} && $m) {
3452 # ACL is defined by user's risk level
3453 my $rf = $gconfig{"risk_$u"}.'.risk';
3454 &read_file_cached("$mdir/$rf", \%rv);
3456 my $sf = $gconfig{"skill_$u"}.'.skill';
3457 &read_file_cached("$mdir/$sf", \%rv);
3460 # Use normal Webmin ACL, if a user is set
3461 my $userdb = &get_userdb_string();
3463 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3464 # Look for this user in the user/group DB, if one is defined
3465 # and if the user might be in the DB
3466 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3467 ref($dbh) || &error(&text('euserdbacl', $dbh));
3468 if ($proto eq "mysql" || $proto eq "postgresql") {
3469 # Find the user in the SQL DB
3470 my $cmd = $dbh->prepare(
3471 "select id from webmin_user where name = ?");
3472 $cmd && $cmd->execute($u) ||
3473 &error(&text('euserdbacl', $dbh->errstr));
3474 my ($id) = $cmd->fetchrow();
3475 $foundindb = 1 if (defined($id));
3478 # Fetch ACLs with SQL
3480 my $cmd = $dbh->prepare(
3481 "select attr,value from webmin_user_acl ".
3482 "where id = ? and module = ?");
3483 $cmd && $cmd->execute($id, $m) ||
3484 &error(&text('euserdbacl', $dbh->errstr));
3485 while(my ($a, $v) = $cmd->fetchrow()) {
3491 elsif ($proto eq "ldap") {
3493 my $rv = $dbh->search(
3495 filter => '(&(cn='.$u.')(objectClass='.
3496 $args->{'userclass'}.'))',
3498 if (!$rv || $rv->code) {
3499 &error(&text('euserdbacl',
3500 $rv ? $rv->error : "Unknown error"));
3502 my ($user) = $rv->all_entries;
3504 # Find ACL sub-object for the module
3505 my $ldapm = $m || "global";
3507 my $rv = $dbh->search(
3508 base => $user->dn(),
3509 filter => '(cn='.$ldapm.')',
3511 if (!$rv || $rv->code) {
3512 &error(&text('euserdbacl',
3513 $rv ? $rv->error : "Unknown error"));
3515 my ($acl) = $rv->all_entries;
3517 foreach my $av ($acl->get_value(
3518 'webminAclEntry')) {
3519 my ($a, $v) = split(/=/, $av,2);
3525 &disconnect_userdb($userdb, $dbh);
3529 # Read from local files
3530 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3531 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3533 "$config_directory/$m/$remote_user.acl",\%rv);
3537 if ($tconfig{'preload_functions'}) {
3538 &load_theme_library();
3540 if (defined(&theme_get_module_acl)) {
3541 %rv = &theme_get_module_acl($u, $m, \%rv);
3546 =head2 get_group_module_acl(group, [module], [no-default])
3548 Returns the ACL for a Webmin group, in an optional module (which defaults to
3549 the current module).
3552 sub get_group_module_acl
3555 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3556 my $mdir = &module_root_directory($m);
3559 &read_file_cached("$mdir/defaultacl", \%rv);
3562 my $userdb = &get_userdb_string();
3565 # Look for this group in the user/group DB
3566 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3567 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3568 if ($proto eq "mysql" || $proto eq "postgresql") {
3569 # Find the group in the SQL DB
3570 my $cmd = $dbh->prepare(
3571 "select id from webmin_group where name = ?");
3572 $cmd && $cmd->execute($g) ||
3573 &error(&text('egroupdbacl', $dbh->errstr));
3574 my ($id) = $cmd->fetchrow();
3575 $foundindb = 1 if (defined($id));
3578 # Fetch ACLs with SQL
3580 my $cmd = $dbh->prepare(
3581 "select attr,value from webmin_group_acl ".
3582 "where id = ? and module = ?");
3583 $cmd && $cmd->execute($id, $m) ||
3584 &error(&text('egroupdbacl', $dbh->errstr));
3585 while(my ($a, $v) = $cmd->fetchrow()) {
3591 elsif ($proto eq "ldap") {
3592 # Find group in LDAP
3593 my $rv = $dbh->search(
3595 filter => '(&(cn='.$g.')(objectClass='.
3596 $args->{'groupclass'}.'))',
3598 if (!$rv || $rv->code) {
3599 &error(&text('egroupdbacl',
3600 $rv ? $rv->error : "Unknown error"));
3602 my ($group) = $rv->all_entries;
3604 # Find ACL sub-object for the module
3605 my $ldapm = $m || "global";
3607 my $rv = $dbh->search(
3608 base => $group->dn(),
3609 filter => '(cn='.$ldapm.')',
3611 if (!$rv || $rv->code) {
3612 &error(&text('egroupdbacl',
3613 $rv ? $rv->error : "Unknown error"));
3615 my ($acl) = $rv->all_entries;
3617 foreach my $av ($acl->get_value(
3618 'webminAclEntry')) {
3619 my ($a, $v) = split(/=/, $av, 2);
3625 &disconnect_userdb($userdb, $dbh);
3628 # Read from local files
3629 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3631 if (defined(&theme_get_module_acl)) {
3632 %rv = &theme_get_module_acl($g, $m, \%rv);
3637 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3639 Updates the acl hash for some user and module. The parameters are :
3641 =item acl - Hash reference for the new access control options, or undef to clear
3643 =item user - User to update, defaulting to the current user.
3645 =item module - Module to update, defaulting to the caller.
3647 =item never-update-group - Never update the user's group's ACL
3652 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3653 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3654 if (!$_[3] && &foreign_check("acl")) {
3655 # Check if this user is a member of a group, and if he gets the
3656 # module from a group. If so, update its ACL as well
3657 &foreign_require("acl", "acl-lib.pl");
3659 foreach my $g (&acl::list_groups()) {
3660 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3661 &indexof($m, @{$g->{'modules'}}) >= 0) {
3667 &save_group_module_acl($_[0], $group->{'name'}, $m);
3671 my $userdb = &get_userdb_string();
3673 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3674 # Look for this user in the user/group DB
3675 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3676 ref($dbh) || &error(&text('euserdbacl', $dbh));
3677 if ($proto eq "mysql" || $proto eq "postgresql") {
3678 # Find the user in the SQL DB
3679 my $cmd = $dbh->prepare(
3680 "select id from webmin_user where name = ?");
3681 $cmd && $cmd->execute($u) ||
3682 &error(&text('euserdbacl2', $dbh->errstr));
3683 my ($id) = $cmd->fetchrow();
3684 $foundindb = 1 if (defined($id));
3687 # Replace ACLs for user
3689 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3690 "where id = ? and module = ?");
3691 $cmd && $cmd->execute($id, $m) ||
3692 &error(&text('euserdbacl', $dbh->errstr));
3695 my $cmd = $dbh->prepare(
3696 "insert into webmin_user_acl ".
3697 "(id,module,attr,value) values (?,?,?,?)");
3698 $cmd || &error(&text('euserdbacl2',
3700 foreach my $a (keys %{$_[0]}) {
3701 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3702 &error(&text('euserdbacl2',
3709 elsif ($proto eq "ldap") {
3710 # Find the user in LDAP
3711 my $rv = $dbh->search(
3713 filter => '(&(cn='.$u.')(objectClass='.
3714 $args->{'userclass'}.'))',
3716 if (!$rv || $rv->code) {
3717 &error(&text('euserdbacl',
3718 $rv ? $rv->error : "Unknown error"));
3720 my ($user) = $rv->all_entries;
3723 # Find the ACL sub-object for the module
3725 my $ldapm = $m || "global";
3726 my $rv = $dbh->search(
3727 base => $user->dn(),
3728 filter => '(cn='.$ldapm.')',
3730 if (!$rv || $rv->code) {
3731 &error(&text('euserdbacl',
3732 $rv ? $rv->error : "Unknown error"));
3734 my ($acl) = $rv->all_entries;
3737 foreach my $a (keys %{$_[0]}) {
3738 push(@al, $a."=".$_[0]->{$a});
3742 $rv = $dbh->modify($acl->dn(),
3743 replace => { "webminAclEntry", \@al });
3747 my @attrs = ( "cn", $ldapm,
3748 "objectClass", "webminAcl",
3749 "webminAclEntry", \@al );
3750 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3753 if (!$rv || $rv->code) {
3754 &error(&text('euserdbacl2',
3755 $rv ? $rv->error : "Unknown error"));
3759 &disconnect_userdb($userdb, $dbh);
3763 # Save ACL to local file
3764 if (!-d "$config_directory/$m") {
3765 mkdir("$config_directory/$m", 0755);
3768 &write_file("$config_directory/$m/$u.acl", $_[0]);
3771 &unlink_file("$config_directory/$m/$u.acl");
3776 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3778 Updates the acl hash for some group and module. The parameters are :
3780 =item acl - Hash reference for the new access control options.
3782 =item group - Group name to update.
3784 =item module - Module to update, defaulting to the caller.
3786 =item never-update-group - Never update the parent group's ACL
3789 sub save_group_module_acl
3792 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3793 if (!$_[3] && &foreign_check("acl")) {
3794 # Check if this group is a member of a group, and if it gets the
3795 # module from a group. If so, update the parent ACL as well
3796 &foreign_require("acl", "acl-lib.pl");
3798 foreach my $pg (&acl::list_groups()) {
3799 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3800 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3806 &save_group_module_acl($_[0], $group->{'name'}, $m);
3810 my $userdb = &get_userdb_string();
3813 # Look for this group in the user/group DB
3814 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3815 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3816 if ($proto eq "mysql" || $proto eq "postgresql") {
3817 # Find the group in the SQL DB
3818 my $cmd = $dbh->prepare(
3819 "select id from webmin_group where name = ?");
3820 $cmd && $cmd->execute($g) ||
3821 &error(&text('egroupdbacl2', $dbh->errstr));
3822 my ($id) = $cmd->fetchrow();
3823 $foundindb = 1 if (defined($id));
3826 # Replace ACLs for group
3828 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3829 "where id = ? and module = ?");
3830 $cmd && $cmd->execute($id, $m) ||
3831 &error(&text('egroupdbacl', $dbh->errstr));
3834 my $cmd = $dbh->prepare(
3835 "insert into webmin_group_acl ".
3836 "(id,module,attr,value) values (?,?,?,?)");
3837 $cmd || &error(&text('egroupdbacl2',
3839 foreach my $a (keys %{$_[0]}) {
3840 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3841 &error(&text('egroupdbacl2',
3848 elsif ($proto eq "ldap") {
3849 # Find the group in LDAP
3850 my $rv = $dbh->search(
3852 filter => '(&(cn='.$g.')(objectClass='.
3853 $args->{'groupclass'}.'))',
3855 if (!$rv || $rv->code) {
3856 &error(&text('egroupdbacl',
3857 $rv ? $rv->error : "Unknown error"));
3859 my ($group) = $rv->all_entries;
3861 my $ldapm = $m || "global";
3863 # Find the ACL sub-object for the module
3865 my $rv = $dbh->search(
3866 base => $group->dn(),
3867 filter => '(cn='.$ldapm.')',
3869 if (!$rv || $rv->code) {
3870 &error(&text('egroupdbacl',
3871 $rv ? $rv->error : "Unknown error"));
3873 my ($acl) = $rv->all_entries;
3876 foreach my $a (keys %{$_[0]}) {
3877 push(@al, $a."=".$_[0]->{$a});
3881 $rv = $dbh->modify($acl->dn(),
3882 replace => { "webminAclEntry", \@al });
3886 my @attrs = ( "cn", $ldapm,
3887 "objectClass", "webminAcl",
3888 "webminAclEntry", \@al );
3889 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
3892 if (!$rv || $rv->code) {
3893 &error(&text('egroupdbacl2',
3894 $rv ? $rv->error : "Unknown error"));
3898 &disconnect_userdb($userdb, $dbh);
3902 # Save ACL to local file
3903 if (!-d "$config_directory/$m") {
3904 mkdir("$config_directory/$m", 0755);
3907 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3910 &unlink_file("$config_directory/$m/$g.gacl");
3917 This function must be called by all Webmin CGI scripts, either directly or
3918 indirectly via a per-module lib.pl file. It performs a number of initialization
3919 and housekeeping tasks, such as working out the module name, checking that the
3920 current user has access to the module, and populating global variables. Some
3921 of the variables set include :
3923 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3925 =item $var_directory - Base logs directory, typically /var/webmin
3927 =item %config - Per-module configuration.
3929 =item %gconfig - Global configuration.
3931 =item $scriptname - Base name of the current perl script.
3933 =item $module_name - The name of the current module.
3935 =item $module_config_directory - The config directory for this module.
3937 =item $module_config_file - The config file for this module.
3939 =item $module_root_directory - This module's code directory.
3941 =item $webmin_logfile - The detailed logfile for webmin.
3943 =item $remote_user - The actual username used to login to webmin.
3945 =item $base_remote_user - The username whose permissions are in effect.
3947 =item $current_theme - The theme currently in use.
3949 =item $root_directory - The first root directory of this webmin install.
3951 =item @root_directories - All root directories for this webmin install.
3956 # Record first process ID that called this, so we know when it exited to clean
3958 $main::initial_process_id ||= $$;
3960 # Configuration and spool directories
3961 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3962 die "WEBMIN_CONFIG not set";
3964 $config_directory = $ENV{'WEBMIN_CONFIG'};
3965 if (!defined($ENV{'WEBMIN_VAR'})) {
3966 open(VARPATH, "$config_directory/var-path");
3967 chop($var_directory = <VARPATH>);
3971 $var_directory = $ENV{'WEBMIN_VAR'};
3973 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3974 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3976 if ($ENV{'SESSION_ID'}) {
3977 # Hide this variable from called programs, but keep it for internal use
3978 $main::session_id = $ENV{'SESSION_ID'};
3979 delete($ENV{'SESSION_ID'});
3981 if ($ENV{'REMOTE_PASS'}) {
3982 # Hide the password too
3983 $main::remote_pass = $ENV{'REMOTE_PASS'};
3984 delete($ENV{'REMOTE_PASS'});
3987 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3988 # Looks like we are running setuid, but the real UID hasn't been set.
3989 # Do so now, so that executed programs don't get confused
3994 # Read the webmin global config file. This contains the OS type and version,
3995 # OS specific configuration and global options such as proxy servers
3996 $config_file = "$config_directory/config";
3998 &read_file_cached($config_file, \%gconfig);
3999 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
4000 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
4002 # Work out of this is a web, command line or cron job
4003 if (!$main::webmin_script_type) {
4004 if ($ENV{'SCRIPT_NAME'}) {
4006 $main::webmin_script_type = 'web';
4009 # Cron jobs have no TTY
4010 if ($gconfig{'os_type'} eq 'windows' ||
4011 open(DEVTTY, ">/dev/tty")) {
4012 $main::webmin_script_type = 'cmd';
4016 $main::webmin_script_type = 'cron';
4021 # If debugging is enabled, open the debug log
4022 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
4023 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
4024 if ($gconfig{'debug_size'}) {
4025 my @st = stat($dlog);
4026 if ($st[7] > $gconfig{'debug_size'}) {
4027 rename($dlog, $dlog.".0");
4030 open(main::DEBUGLOG, ">>$dlog");
4031 $main::opened_debug_log = 1;
4033 if ($gconfig{'debug_what_start'}) {
4034 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4035 $main::debug_log_start_time = time();
4036 &webmin_debug_log("START", "script=$script_name");
4037 $main::debug_log_start_module = $module_name;
4041 # Set PATH and LD_LIBRARY_PATH
4042 if ($gconfig{'path'}) {
4043 if ($gconfig{'syspath'}) {
4045 $ENV{'PATH'} = $gconfig{'path'};
4049 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
4052 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
4054 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
4055 if ($gconfig{'http_proxy'}) {
4056 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
4058 if ($gconfig{'ftp_proxy'}) {
4059 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
4061 if ($gconfig{'noproxy'}) {
4062 $ENV{'no_proxy'} = $gconfig{'noproxy'};
4065 # Find all root directories
4067 if (&get_miniserv_config(\%miniserv)) {
4068 @root_directories = ( $miniserv{'root'} );
4069 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
4070 push(@root_directories, $miniserv{"extraroot_$i"});
4074 # Work out which module we are in, and read the per-module config file
4075 $0 =~ s/\\/\//g; # Force consistent path on Windows
4076 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
4077 # In a foreign call - use the module name given
4078 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
4079 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
4080 @root_directories = ( $root_directory ) if (!@root_directories);
4082 elsif ($ENV{'SCRIPT_NAME'}) {
4083 my $sn = $ENV{'SCRIPT_NAME'};
4084 $sn =~ s/^$gconfig{'webprefix'}//
4085 if (!$gconfig{'webprefixnoredir'});
4086 if ($sn =~ /^\/([^\/]+)\//) {
4087 # Get module name from CGI path
4090 if ($ENV{'SERVER_ROOT'}) {
4091 $root_directory = $ENV{'SERVER_ROOT'};
4093 elsif ($ENV{'SCRIPT_FILENAME'}) {
4094 $root_directory = $ENV{'SCRIPT_FILENAME'};
4095 $root_directory =~ s/$sn$//;
4097 @root_directories = ( $root_directory ) if (!@root_directories);
4100 # Get root directory from miniserv.conf, and deduce module name from $0
4101 $root_directory = $root_directories[0];
4103 foreach my $r (@root_directories) {
4104 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
4105 # Under a module directory
4110 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
4116 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
4119 # Set the umask based on config
4120 if ($gconfig{'umask'} && !$main::umask_already++) {
4121 umask(oct($gconfig{'umask'}));
4124 # If this is a cron job or other background task, set the nice level
4125 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4127 if ($gconfig{'nice'}) {
4128 eval 'POSIX::nice($gconfig{\'nice\'});';
4131 # Set IO scheduling class and priority
4132 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4134 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4135 if ($gconfig{'sclass'} ne '');
4136 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4137 if ($gconfig{'sprio'} ne '');
4139 &execute_command("$cmd >/dev/null 2>&1");
4142 $main::nice_already++;
4145 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4146 $base_remote_user = $u;
4147 $remote_user = $ENV{'REMOTE_USER'};
4149 # Work out if user is definitely in the DB, and if so get his attrs
4150 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4151 %remote_user_attrs = ( );
4152 if ($remote_user_proto) {
4153 my $userdb = &get_userdb_string();
4154 my ($dbh, $proto, $prefix, $args) =
4155 $userdb ? &connect_userdb($userdb) : ( );
4157 if ($proto eq "mysql" || $proto eq "postgresql") {
4158 # Read attrs from SQL
4159 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
4160 if ($cmd && $cmd->execute($base_remote_user)) {
4161 while(my ($attr, $value) = $cmd->fetchrow()) {
4162 $remote_user_attrs{$attr} = $value;
4167 elsif ($proto eq "ldap") {
4168 # Read attrs from LDAP
4169 my $rv = $dbh->search(
4171 filter => '(&(cn='.$base_remote_user.')'.
4173 $args->{'userclass'}.'))',
4175 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4177 foreach $la ($u->get_value('webminAttr')) {
4178 my ($attr, $value) = split(/=/, $la, 2);
4179 $remote_user_attrs{$attr} = $value;
4183 &disconnect_userdb($userdb, $dbh);
4188 # Find and load the configuration file for this module
4189 my (@ruinfo, $rgroup);
4190 $module_config_directory = "$config_directory/$module_name";
4191 if (&get_product_name() eq "usermin" &&
4192 -r "$module_config_directory/config.$remote_user") {
4194 $module_config_file = "$module_config_directory/config.$remote_user";
4196 elsif (&get_product_name() eq "usermin" &&
4197 (@ruinfo = getpwnam($remote_user)) &&
4198 ($rgroup = getgrgid($ruinfo[3])) &&
4199 -r "$module_config_directory/config.\@$rgroup") {
4200 # Based on group name
4201 $module_config_file = "$module_config_directory/config.\@$rgroup";
4205 $module_config_file = "$module_config_directory/config";
4208 &read_file_cached($module_config_file, \%config);
4210 # Fix up windows-specific substitutions in values
4211 foreach my $k (keys %config) {
4212 if ($config{$k} =~ /\$\{systemroot\}/) {
4213 my $root = &get_windows_root();
4214 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4219 # Record the initial module
4220 $main::initial_module_name ||= $module_name;
4222 # Set some useful variables
4224 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4225 $gconfig{'mobile_theme'} :
4226 defined($remote_user_attrs{'theme'}) ?
4227 $remote_user_attrs{'theme'} :
4228 defined($gconfig{'theme_'.$remote_user}) ?
4229 $gconfig{'theme_'.$remote_user} :
4230 defined($gconfig{'theme_'.$base_remote_user}) ?
4231 $gconfig{'theme_'.$base_remote_user} :
4233 @current_themes = split(/\s+/, $current_themes);
4234 $current_theme = $current_themes[0];
4235 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4236 $theme_root_directory = $theme_root_directories[0];
4237 @theme_configs = ( );
4238 foreach my $troot (@theme_root_directories) {
4240 &read_file_cached("$troot/config", \%onetconfig);
4241 &read_file_cached("$troot/config", \%tconfig);
4242 push(@theme_configs, \%onetconfig);
4244 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4245 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4247 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4248 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4250 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4251 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4252 if ($tconfig{'preload_functions'}) {
4253 # Force load of theme functions right now, if requested
4254 &load_theme_library();
4256 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4257 # Load the theme's Webmin:: package classes
4258 do "$theme_root_directory/$tconfig{'oofunctions'}";
4263 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4264 : "$var_directory/webmin.log";
4266 # Load language strings into %text
4267 my @langs = &list_languages();
4269 if ($gconfig{'acceptlang'}) {
4270 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4271 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4273 $accepted_lang = $al->{'lang'};
4278 $current_lang = $force_lang ? $force_lang :
4279 $accepted_lang ? $accepted_lang :
4280 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4281 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4282 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4283 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4284 foreach my $l (@langs) {
4285 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4287 @lang_order_list = &unique($default_lang,
4288 split(/:/, $current_lang_info->{'fallback'}),
4290 %text = &load_language($module_name);
4291 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4293 # Get the %module_info for this module
4295 my ($mi) = grep { $_->{'dir'} eq $module_name }
4296 &get_all_module_infos(2);
4297 %module_info = %$mi;
4298 $module_root_directory = &module_root_directory($module_name);
4301 if ($module_name && !$main::no_acl_check &&
4302 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4303 # Check if the HTTP user can access this module
4304 if (!&foreign_available($module_name)) {
4305 if (!&foreign_check($module_name)) {
4306 &error(&text('emodulecheck',
4307 "<i>$module_info{'desc'}</i>"));
4310 &error(&text('emodule', "<i>$u</i>",
4311 "<i>$module_info{'desc'}</i>"));
4314 $main::no_acl_check++;
4317 # Check the Referer: header for nasty redirects
4318 my @referers = split(/\s+/, $gconfig{'referers'});
4320 my $r = $ENV{'HTTP_REFERER'};
4321 if ($r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?\[([^\]]+)\]/ ||
4322 $r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4325 my $http_host = $ENV{'HTTP_HOST'};
4326 $http_host =~ s/:\d+$//;
4327 $http_host =~ s/^\[(\S+)\]$/$1/;
4328 my $unsafe_index = $unsafe_index_cgi ||
4329 &get_module_variable('$unsafe_index_cgi');
4331 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4332 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4334 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4335 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4336 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4337 ($referer_site && $referer_site ne $http_host &&
4338 &indexof($referer_site, @referers) < 0 ||
4339 !$referer_site && $gconfig{'referers_none'}) &&
4340 !$trust_unknown_referers &&
4341 !&get_module_variable('$trust_unknown_referers')) {
4342 # Looks like a link from elsewhere .. show an error
4343 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4345 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4346 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4347 if ($referer_site) {
4349 print &text('referer_warn',
4350 "<tt>".&html_escape($r)."</tt>", $url);
4352 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4353 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4356 # No referer info given
4357 print &text('referer_warn_unknown', $url),"<p>\n";
4358 print &text('referer_fix1u'),"<p>\n";
4359 print &text('referer_fix2u'),"<p>\n";
4363 &footer("/", $text{'index'});
4366 $main::no_referers_check++;
4367 $main::completed_referers_check++;
4369 # Call theme post-init
4370 if (defined(&theme_post_init_config)) {
4371 &theme_post_init_config(@_);
4374 # Record that we have done the calling library in this package
4375 my ($callpkg, $lib) = caller();
4377 $main::done_foreign_require{$callpkg,$lib} = 1;
4379 # If a licence checking is enabled, do it now
4380 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4381 &foreign_check($gconfig{'licence_module'}) &&
4382 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4383 my $oldpwd = &get_current_dir();
4384 $main::done_licence_module_check++;
4385 $main::licence_module = $gconfig{'licence_module'};
4386 &foreign_require($main::licence_module, "licence_check.pl");
4387 ($main::licence_status, $main::licence_message) =
4388 &foreign_call($main::licence_module, "check_licence");
4392 # Export global variables to caller
4393 if ($main::export_to_caller) {
4394 foreach my $v ('$config_file', '%gconfig', '$null_file',
4395 '$path_separator', '@root_directories',
4396 '$root_directory', '$module_name',
4397 '$base_remote_user', '$remote_user',
4398 '$remote_user_proto', '%remote_user_attrs',
4399 '$module_config_directory', '$module_config_file',
4400 '%config', '@current_themes', '$current_theme',
4401 '@theme_root_directories', '$theme_root_directory',
4402 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4403 '$webmin_logfile', '$current_lang',
4404 '$current_lang_info', '@lang_order_list', '%text',
4405 '%module_info', '$module_root_directory') {
4406 my ($vt, $vn) = split('', $v, 2);
4407 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4414 =head2 load_language([module], [directory])
4416 Returns a hashtable mapping text codes to strings in the appropriate language,
4417 based on the $current_lang global variable, which is in turn set based on
4418 the Webmin user's selection. The optional module parameter tells the function
4419 which module to load strings for, and defaults to the calling module. The
4420 optional directory parameter can be used to load strings from a directory
4423 In regular module development you will never need to call this function
4424 directly, as init_config calls it for you, and places the module's strings
4425 into the %text hash.
4431 my $root = $root_directory;
4432 my $ol = $gconfig{'overlang'};
4433 my ($dir) = ($_[1] || "lang");
4435 # Read global lang files
4436 foreach my $o (@lang_order_list) {
4437 my $ok = &read_file_cached_with_stat("$root/$dir/$o", \%text);
4438 return () if (!$ok && $o eq $default_lang);
4441 foreach my $o (@lang_order_list) {
4442 &read_file_cached("$root/$ol/$o", \%text);
4445 &read_file_cached("$config_directory/custom-lang", \%text);
4446 foreach my $o (@lang_order_list) {
4447 next if ($o eq "en");
4448 &read_file_cached("$config_directory/custom-lang-$o", \%text);
4450 my $norefs = $text{'__norefs'};
4453 # Read module's lang files
4454 delete($text{'__norefs'});
4455 my $mdir = &module_root_directory($_[0]);
4456 foreach my $o (@lang_order_list) {
4457 &read_file_cached_with_stat("$mdir/$dir/$o", \%text);
4460 foreach my $o (@lang_order_list) {
4461 &read_file_cached("$mdir/$ol/$o", \%text);
4464 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4465 foreach my $o (@lang_order_list) {
4466 next if ($o eq "en");
4467 &read_file_cached("$config_directory/$_[0]/custom-lang-$o",
4470 $norefs = $text{'__norefs'} if ($norefs);
4473 # Replace references to other strings
4475 foreach $k (keys %text) {
4476 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4480 if (defined(&theme_load_language)) {
4481 &theme_load_language(\%text, $_[0]);
4486 =head2 text_subs(string)
4488 Used internally by load_language to expand $code substitutions in language
4494 if (substr($_[0], 0, 8) eq "include:") {
4497 open(INCLUDE, substr($_[0], 8));
4505 my $t = $_[1]->{$_[0]};
4506 return defined($t) ? $t : '$'.$_[0];
4510 =head2 text(message, [substitute]+)
4512 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4513 the substitute parameters. This makes it easy to use strings with placeholders
4514 that get replaced with programmatically generated text. For example :
4516 print &text('index_hello', $remote_user),"<p>\n";
4521 my $t = &get_module_variable('%text', 1);
4522 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4523 for(my $i=1; $i<@_; $i++) {
4524 $rv =~ s/\$$i/$_[$i]/g;
4529 =head2 encode_base64(string)
4531 Encodes a string into base64 format, for use in MIME email or HTTP
4532 authorization headers.
4538 pos($_[0]) = 0; # ensure start at the beginning
4539 while ($_[0] =~ /(.{1,57})/gs) {
4540 $res .= substr(pack('u57', $1), 1)."\n";
4543 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4544 my $padding = (3 - length($_[0]) % 3) % 3;
4545 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4549 =head2 decode_base64(string)
4551 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4558 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4559 if (length($str) % 4) {
4562 $str =~ s/=+$//; # remove padding
4563 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4564 while ($str =~ /(.{1,60})/gs) {
4565 my $len = chr(32 + length($1)*3/4); # compute length byte
4566 $res .= unpack("u", $len . $1 ); # uudecode
4571 =head2 get_module_info(module, [noclone], [forcache])
4573 Returns a hash containg details of the given module. Some useful keys are :
4575 =item dir - The module directory, like sendmail.
4577 =item desc - Human-readable description, in the current users' language.
4579 =item version - Optional module version number.
4581 =item os_support - List of supported operating systems and versions.
4583 =item category - Category on Webmin's left menu, like net.
4588 return () if ($_[0] =~ /^\./);
4589 my (%rv, $clone, $o);
4590 my $mdir = &module_root_directory($_[0]);
4591 &read_file_cached("$mdir/module.info", \%rv) || return ();
4593 # A clone is a module that links to another directory under the root
4594 foreach my $r (@root_directories) {
4595 if (&is_under_directory($r, $mdir)) {
4601 foreach $o (@lang_order_list) {
4602 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4603 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4605 if ($clone && !$_[1] && $config_directory) {
4606 $rv{'clone'} = $rv{'desc'};
4607 &read_file("$config_directory/$_[0]/clone", \%rv);
4610 my %module_categories;
4611 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4612 my $pn = &get_product_name();
4613 if (defined($rv{'category_'.$pn})) {
4614 # Can override category for webmin/usermin
4615 $rv{'category'} = $rv{'category_'.$pn};
4617 $rv{'realcategory'} = $rv{'category'};
4618 $rv{'category'} = $module_categories{$_[0]}
4619 if (defined($module_categories{$_[0]}));
4621 # Apply description overrides
4622 $rv{'realdesc'} = $rv{'desc'};
4624 &read_file_cached("$config_directory/webmin.descs", \%descs);
4625 if ($descs{$_[0]." ".$current_lang}) {
4626 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4628 elsif ($descs{$_[0]}) {
4629 $rv{'desc'} = $descs{$_[0]};
4633 # Apply per-user description overridde
4634 my %gaccess = &get_module_acl(undef, "");
4635 if ($gaccess{'desc_'.$_[0]}) {
4636 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4640 if ($rv{'longdesc'}) {
4641 # All standard modules have an index.cgi
4642 $rv{'index_link'} = 'index.cgi';
4645 # Call theme-specific override function
4646 if (defined(&theme_get_module_info)) {
4647 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4653 =head2 get_all_module_infos(cachemode)
4655 Returns a list contains the information on all modules in this webmin
4656 install, including clones. Uses caching to reduce the number of module.info
4657 files that need to be read. Each element of the array is a hash reference
4658 in the same format as returned by get_module_info. The cache mode flag can be :
4659 0 = read and write, 1 = don't read or write, 2 = read only
4662 sub get_all_module_infos
4666 # Is the cache out of date? (ie. have any of the root's changed?)
4667 my $cache_file = "$config_directory/module.infos.cache";
4669 if (&read_file_cached($cache_file, \%cache)) {
4670 foreach my $r (@root_directories) {
4672 if ($st[9] != $cache{'mtime_'.$r}) {
4682 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4683 # Can use existing module.info cache
4685 foreach my $k (keys %cache) {
4686 if ($k =~ /^(\S+) (\S+)$/) {
4687 $mods{$1}->{$2} = $cache{$k};
4690 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4693 # Need to rebuild cache
4695 foreach my $r (@root_directories) {
4697 foreach my $m (readdir(DIR)) {
4698 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4699 my %minfo = &get_module_info($m, 0, 1);
4700 next if (!%minfo || !$minfo{'dir'});
4702 foreach $k (keys %minfo) {
4703 $cache{"${m} ${k}"} = $minfo{$k};
4708 $cache{'mtime_'.$r} = $st[9];
4710 $cache{'lang'} = $current_lang;
4711 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4714 # Override descriptions for modules for current user
4715 my %gaccess = &get_module_acl(undef, "");
4716 foreach my $m (@rv) {
4717 if ($gaccess{"desc_".$m->{'dir'}}) {
4718 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4722 # Apply installed flags
4724 &read_file_cached("$config_directory/installed.cache", \%installed);
4725 foreach my $m (@rv) {
4726 $m->{'installed'} = $installed{$m->{'dir'}};
4732 =head2 get_theme_info(theme)
4734 Returns a hash containing a theme's details, taken from it's theme.info file.
4735 Some useful keys are :
4737 =item dir - The theme directory, like blue-theme.
4739 =item desc - Human-readable description, in the current users' language.
4741 =item version - Optional module version number.
4743 =item os_support - List of supported operating systems and versions.
4748 return () if ($_[0] =~ /^\./);
4750 my $tdir = &module_root_directory($_[0]);
4751 &read_file("$tdir/theme.info", \%rv) || return ();
4752 foreach my $o (@lang_order_list) {
4753 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4759 =head2 list_languages
4761 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4762 Each is a hash reference with the following keys :
4764 =item lang - The short language code, like es for Spanish.
4766 =item desc - A human-readable description, in English.
4768 =item charset - An optional character set to use when displaying the language.
4770 =item titles - Set to 1 only if Webmin has title images for the language.
4772 =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.
4777 if (!@main::list_languages_cache) {
4780 open(LANG, "$root_directory/lang_list.txt");
4782 if (/^(\S+)\s+(.*)/) {
4783 my $l = { 'desc' => $2 };
4784 foreach $o (split(/,/, $1)) {
4785 if ($o =~ /^([^=]+)=(.*)$/) {
4789 $l->{'index'} = scalar(@rv);
4790 push(@main::list_languages_cache, $l);
4794 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4795 @main::list_languages_cache;
4797 return @main::list_languages_cache;
4800 =head2 read_env_file(file, &hash)
4802 Similar to Webmin's read_file function, but handles files containing shell
4803 environment variables formatted like :
4808 The file parameter is the full path to the file to read, and hash a Perl hash
4809 ref to read names and values into.
4815 &open_readfile(FILE, $_[0]) || return 0;
4818 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4819 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4820 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4828 =head2 write_env_file(file, &hash, [export])
4830 Writes out a hash to a file in name='value' format, suitable for use in a shell
4831 script. The parameters are :
4833 =item file - Full path for a file to write to
4835 =item hash - Hash reference of names and values to write.
4837 =item export - If set to 1, preceed each variable setting with the word 'export'.
4842 my $exp = $_[2] ? "export " : "";
4843 &open_tempfile(FILE, ">$_[0]");
4844 foreach my $k (keys %{$_[1]}) {
4845 my $v = $_[1]->{$k};
4846 if ($v =~ /^\S+$/) {
4847 &print_tempfile(FILE, "$exp$k=$v\n");
4850 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4853 &close_tempfile(FILE);
4856 =head2 lock_file(filename, [readonly], [forcefile])
4858 Lock a file for exclusive access. If the file is already locked, spin
4859 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4860 to work OK. The parameters are :
4862 =item filename - File or directory to lock.
4864 =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.
4866 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4871 my $realfile = &translate_filename($_[0]);
4872 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4873 my $no_lock = !&can_lock_file($realfile);
4874 my $lock_tries_count = 0;
4877 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4882 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4885 # Create the .lock file
4886 open(LOCKING, ">$realfile.lock") || return 0;
4887 my $lck = eval "flock(LOCKING, 2+4)";
4889 # Lock of lock file failed! Wait till later
4892 print LOCKING $$,"\n";
4893 eval "flock(LOCKING, 8)";
4896 $main::locked_file_list{$realfile} = int($_[1]);
4897 push(@main::temporary_files, "$realfile.lock");
4898 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4899 !&get_module_variable('$no_log_file_changes') &&
4901 # Grab a copy of this file for later diffing
4903 $main::locked_file_data{$realfile} = undef;
4905 $main::locked_file_type{$realfile} = 1;
4906 $main::locked_file_data{$realfile} = '';
4908 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4909 $main::locked_file_type{$realfile} = 2;
4910 $main::locked_file_data{$realfile} = $lnk;
4912 elsif (open(ORIGFILE, $realfile)) {
4913 $main::locked_file_type{$realfile} = 0;
4914 $main::locked_file_data{$realfile} = '';
4917 $main::locked_file_data{$realfile} .=$_;
4926 if ($lock_tries_count++ > 5*60) {
4927 # Give up after 5 minutes
4928 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4934 =head2 unlock_file(filename)
4936 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4937 file changes is enabled, then at unlock file a diff will be taken between the
4938 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4939 called. This can then be viewed in the Webmin Actions Log module.
4944 my $realfile = &translate_filename($_[0]);
4945 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4946 unlink("$realfile.lock") if (&can_lock_file($realfile));
4947 delete($main::locked_file_list{$realfile});
4948 if (exists($main::locked_file_data{$realfile})) {
4949 # Diff the new file with the old
4951 my $lnk = readlink($realfile);
4952 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4953 my $oldtype = $main::locked_file_type{$realfile};
4954 my $new = !defined($main::locked_file_data{$realfile});
4955 if ($new && !-e _) {
4956 # file doesn't exist, and never did! do nothing ..
4958 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4959 # is (or was) a directory ..
4960 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4961 push(@main::locked_file_diff,
4962 { 'type' => 'mkdir', 'object' => $realfile });
4964 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4965 push(@main::locked_file_diff,
4966 { 'type' => 'rmdir', 'object' => $realfile });
4969 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4970 # is (or was) a symlink ..
4971 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4972 push(@main::locked_file_diff,
4973 { 'type' => 'symlink', 'object' => $realfile,
4976 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4977 push(@main::locked_file_diff,
4978 { 'type' => 'unsymlink', 'object' => $realfile,
4979 'data' => $main::locked_file_data{$realfile} });
4981 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4982 push(@main::locked_file_diff,
4983 { 'type' => 'resymlink', 'object' => $realfile,
4988 # is a file, or has changed type?!
4989 my ($diff, $delete_file);
4990 my $type = "modify";
4992 open(NEWFILE, ">$realfile");
4997 if (!defined($main::locked_file_data{$realfile})) {
5000 open(ORIGFILE, ">$realfile.webminorig");
5001 print ORIGFILE $main::locked_file_data{$realfile};
5003 $diff = &backquote_command(
5004 "diff ".quotemeta("$realfile.webminorig")." ".
5005 quotemeta($realfile)." 2>/dev/null");
5006 push(@main::locked_file_diff,
5007 { 'type' => $type, 'object' => $realfile,
5008 'data' => $diff } ) if ($diff);
5009 unlink("$realfile.webminorig");
5010 unlink($realfile) if ($delete_file);
5013 if ($gconfig{'logfullfiles'}) {
5014 # Add file details to list of those to fully log
5015 $main::orig_file_data{$realfile} ||=
5016 $main::locked_file_data{$realfile};
5017 $main::orig_file_type{$realfile} ||=
5018 $main::locked_file_type{$realfile};
5021 delete($main::locked_file_data{$realfile});
5022 delete($main::locked_file_type{$realfile});
5026 =head2 test_lock(file)
5028 Returns 1 if some file is currently locked, 0 if not.
5033 my $realfile = &translate_filename($_[0]);
5034 return 0 if (!$_[0]);
5035 return 1 if (defined($main::locked_file_list{$realfile}));
5036 return 0 if (!&can_lock_file($realfile));
5038 if (open(LOCKING, "$realfile.lock")) {
5043 return $pid && kill(0, $pid);
5046 =head2 unlock_all_files
5048 Unlocks all files locked by the current script.
5051 sub unlock_all_files
5053 foreach $f (keys %main::locked_file_list) {
5058 =head2 can_lock_file(file)
5060 Returns 1 if some file should be locked, based on the settings in the
5061 Webmin Configuration module. For internal use by lock_file only.
5066 if (&is_readonly_mode()) {
5067 return 0; # never lock in read-only mode
5069 elsif ($gconfig{'lockmode'} == 0) {
5072 elsif ($gconfig{'lockmode'} == 1) {
5076 # Check if under any of the directories
5078 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
5079 if (&same_file($d, $_[0]) ||
5080 &is_under_directory($d, $_[0])) {
5084 return $gconfig{'lockmode'} == 2 ? $match : !$match;
5088 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
5090 Log some action taken by a user. This is typically called at the end of a
5091 script, once all file changes are complete and all commands run. The
5094 =item action - A short code for the action being performed, like 'create'.
5096 =item type - A code for the type of object the action is performed to, like 'user'.
5098 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
5100 =item params - A hash ref of additional information about the action.
5102 =item module - Name of the module in which the action was performed, which defaults to the current module.
5104 =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.
5106 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
5108 =item client-ip - IP address of the browser that performed the action.
5113 return if (!$gconfig{'log'} || &is_readonly_mode());
5114 my $m = $_[4] ? $_[4] : &get_module_name();
5116 if ($gconfig{'logclear'}) {
5117 # check if it is time to clear the log
5118 my @st = stat("$webmin_logfile.time");
5119 my $write_logtime = 0;
5121 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
5122 # clear logfile and all diff files
5123 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
5124 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
5125 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
5126 unlink($webmin_logfile);
5133 if ($write_logtime) {
5134 open(LOGTIME, ">$webmin_logfile.time");
5135 print LOGTIME time(),"\n";
5140 # If an action script directory is defined, call the appropriate scripts
5141 if ($gconfig{'action_script_dir'}) {
5142 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
5143 my ($basedir) = $gconfig{'action_script_dir'};
5145 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
5148 opendir(DIR, $dir) or die "Can't open $dir: $!";
5149 while (defined($file = readdir(DIR))) {
5150 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
5151 if (-x "$dir/$file") {
5152 # Call a script notifying it of the action
5154 $ENV{'ACTION_MODULE'} = &get_module_name();
5155 $ENV{'ACTION_ACTION'} = $_[0];
5156 $ENV{'ACTION_TYPE'} = $_[1];
5157 $ENV{'ACTION_OBJECT'} = $_[2];
5158 $ENV{'ACTION_SCRIPT'} = $script_name;
5159 foreach my $p (keys %param) {
5160 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5162 system("$dir/$file", @_,
5163 "<$null_file", ">$null_file", "2>&1");
5171 # should logging be done at all?
5172 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5173 split(/\s+/, $gconfig{'logusers'})) < 0);
5174 return if ($gconfig{'logmodules'} && &indexof($m,
5175 split(/\s+/, $gconfig{'logmodules'})) < 0);
5179 my @tm = localtime($now);
5180 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5181 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5182 $main::action_id_count++;
5183 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5184 $id, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5185 $tm[2], $tm[1], $tm[0],
5186 $remote_user || '-',
5187 $main::session_id || '-',
5188 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5189 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5190 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5192 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5193 my $v = $_[3]->{$k};
5199 elsif (ref($v) eq 'ARRAY') {
5203 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5204 $line .= " $k='$vv'";
5208 foreach $vv (split(/\0/, $v)) {
5210 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5211 $line .= " $k='$vv'";
5214 $param{$k} = join(" ", @pv);
5216 open(WEBMINLOG, ">>$webmin_logfile");
5217 print WEBMINLOG $line,"\n";
5219 if ($gconfig{'logperms'}) {
5220 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5223 chmod(0600, $webmin_logfile);
5226 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5227 # Find and record the changes made to any locked files, or commands run
5229 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5230 foreach my $d (@main::locked_file_diff) {
5231 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
5232 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
5233 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5234 print DIFFLOG $d->{'data'};
5236 if ($d->{'input'}) {
5237 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5238 print DIFFLOG $d->{'input'};
5241 if ($gconfig{'logperms'}) {
5242 chmod(oct($gconfig{'logperms'}),
5243 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
5244 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5248 @main::locked_file_diff = undef;
5251 if ($gconfig{'logfullfiles'}) {
5252 # Save the original contents of any modified files
5254 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5255 foreach my $f (keys %main::orig_file_data) {
5256 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
5257 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
5258 if (!defined($main::orig_file_type{$f})) {
5259 print ORIGLOG -1," ",$f,"\n";
5262 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5264 print ORIGLOG $main::orig_file_data{$f};
5266 if ($gconfig{'logperms'}) {
5267 chmod(oct($gconfig{'logperms'}),
5268 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
5272 %main::orig_file_data = undef;
5273 %main::orig_file_type = undef;
5276 if ($miniserv::page_capture_out) {
5277 # Save the whole page output
5278 mkdir("$ENV{'WEBMIN_VAR'}/output", 0700);
5279 open(PAGEOUT, ">$ENV{'WEBMIN_VAR'}/output/$id");
5280 print PAGEOUT $miniserv::page_capture_out;
5282 if ($gconfig{'logperms'}) {
5283 chmod(oct($gconfig{'logperms'}),
5284 "$ENV{'WEBMIN_VAR'}/output/$id");
5286 $miniserv::page_capture_out = undef;
5290 if ($gconfig{'logsyslog'}) {
5291 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5292 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5293 setlogsock("inet");';
5295 # Syslog module is installed .. try to convert to a
5296 # human-readable form
5298 my $mod = &get_module_name();
5299 my $mdir = module_root_directory($mod);
5300 if (-r "$mdir/log_parser.pl") {
5301 &foreign_require($mod, "log_parser.pl");
5303 foreach my $k (keys %{$_[3]}) {
5304 my $v = $_[3]->{$k};
5305 if (ref($v) eq 'ARRAY') {
5306 $params{$k} = join("\0", @$v);
5312 $msg = &foreign_call($mod, "parse_webmin_log",
5313 $remote_user, $script_name,
5314 $_[0], $_[1], $_[2], \%params);
5315 $msg =~ s/<[^>]*>//g; # Remove tags
5317 elsif ($_[0] eq "_config_") {
5318 my %wtext = &load_language("webminlog");
5319 $msg = $wtext{'search_config'};
5321 $msg ||= "$_[0] $_[1] $_[2]";
5322 my %info = &get_module_info($m);
5323 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5328 =head2 additional_log(type, object, data, [input])
5330 Records additional log data for an upcoming call to webmin_log, such
5331 as a command that was run or SQL that was executed. Typically you will never
5332 need to call this function directory.
5337 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5338 push(@main::locked_file_diff,
5339 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5340 'input' => $_[3] } );
5344 =head2 webmin_debug_log(type, message)
5346 Write something to the Webmin debug log. For internal use only.
5349 sub webmin_debug_log
5351 my ($type, $msg) = @_;
5352 return 0 if (!$main::opened_debug_log);
5353 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5354 if ($gconfig{'debug_modules'}) {
5355 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5356 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5359 eval 'use Time::HiRes qw(gettimeofday); ($now, $ms) = gettimeofday';
5361 my @tm = localtime($now);
5363 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d.%6.6d] %s %s %s %s \"%s\"",
5364 $$, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5365 $tm[2], $tm[1], $tm[0], $ms,
5366 $remote_user || "-",
5367 $ENV{'REMOTE_HOST'} || "-",
5368 &get_module_name() || "-",
5371 seek(main::DEBUGLOG, 0, 2);
5372 print main::DEBUGLOG $line."\n";
5376 =head2 system_logged(command)
5378 Just calls the Perl system() function, but also logs the command run.
5383 if (&is_readonly_mode()) {
5384 print STDERR "Vetoing command $_[0]\n";
5387 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5388 my $cmd = join(" ", @realcmd);
5390 if ($cmd =~ s/(\s*&\s*)$//) {
5393 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5394 $cmd =~ s/^\((.*)\)\s*$/$1/;
5396 &additional_log('exec', undef, $cmd);
5397 return system(@realcmd);
5400 =head2 backquote_logged(command)
5402 Executes a command and returns the output (like `command`), but also logs it.
5405 sub backquote_logged
5407 if (&is_readonly_mode()) {
5409 print STDERR "Vetoing command $_[0]\n";
5412 my $realcmd = &translate_command($_[0]);
5415 if ($cmd =~ s/(\s*&\s*)$//) {
5418 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5419 $cmd =~ s/^\((.*)\)\s*$/$1/;
5421 &additional_log('exec', undef, $cmd);
5422 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5426 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5428 Runs some command, waiting at most the given number of seconds for it to
5429 complete, and returns the output. The maxlines parameter sets the number
5430 of lines of output to capture. The safe parameter should be set to 1 if the
5431 command is safe for read-only mode users to run.
5434 sub backquote_with_timeout
5436 my $realcmd = &translate_command($_[0]);
5437 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5438 if ($gconfig{'debug_what_cmd'});
5440 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5445 my $elapsed = time() - $start;
5446 last if ($elapsed > $_[1]);
5448 vec($rmask, fileno(OUT), 1) = 1;
5449 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5450 last if (!$sel || $sel < 0);
5452 last if (!defined($line));
5455 if ($_[3] && $linecount >= $_[3]) {
5460 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5464 return wantarray ? ($out, $timed_out) : $out;
5467 =head2 backquote_command(command, safe?)
5469 Executes a command and returns the output (like `command`), subject to
5470 command translation. The safe parameter should be set to 1 if the command
5471 is safe for read-only mode users to run.
5474 sub backquote_command
5476 if (&is_readonly_mode() && !$_[1]) {
5477 print STDERR "Vetoing command $_[0]\n";
5481 my $realcmd = &translate_command($_[0]);
5482 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5486 =head2 kill_logged(signal, pid, ...)
5488 Like Perl's built-in kill function, but also logs the fact that some process
5489 was killed. On Windows, falls back to calling process.exe to terminate a
5495 return scalar(@_)-1 if (&is_readonly_mode());
5496 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5497 if ($gconfig{'debug_what_procs'});
5498 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5499 if ($gconfig{'os_type'} eq 'windows') {
5500 # Emulate some kills with process.exe
5501 my $arg = $_[0] eq "KILL" ? "-k" :
5502 $_[0] eq "TERM" ? "-q" :
5503 $_[0] eq "STOP" ? "-s" :
5504 $_[0] eq "CONT" ? "-r" : undef;
5506 foreach my $p (@_[1..@_-1]) {
5508 $ok ||= kill($_[0], $p);
5511 &execute_command("process $arg $p");
5523 =head2 rename_logged(old, new)
5525 Re-names a file and logs the rename. If the old and new files are on different
5526 filesystems, calls mv or the Windows rename function to do the job.
5531 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5532 return &rename_file($_[0], $_[1]);
5535 =head2 rename_file(old, new)
5537 Renames a file or directory. If the old and new files are on different
5538 filesystems, calls mv or the Windows rename function to do the job.
5543 if (&is_readonly_mode()) {
5544 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5547 my $src = &translate_filename($_[0]);
5548 my $dst = &translate_filename($_[1]);
5549 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5550 if ($gconfig{'debug_what_ops'});
5551 my $ok = rename($src, $dst);
5552 if (!$ok && $! !~ /permission/i) {
5553 # Try the mv command, in case this is a cross-filesystem rename
5554 if ($gconfig{'os_type'} eq 'windows') {
5555 # Need to use rename
5556 my $out = &backquote_command("rename ".quotemeta($_[0]).
5557 " ".quotemeta($_[1])." 2>&1");
5559 $! = $out if (!$ok);
5563 my $out = &backquote_command("mv ".quotemeta($_[0]).
5564 " ".quotemeta($_[1])." 2>&1");
5566 $! = $out if (!$ok);
5572 =head2 symlink_logged(src, dest)
5574 Create a symlink, and logs it. Effectively does the same thing as the Perl
5581 my $rv = &symlink_file($_[0], $_[1]);
5582 &unlock_file($_[1]);
5586 =head2 symlink_file(src, dest)
5588 Creates a soft link, unless in read-only mode. Effectively does the same thing
5589 as the Perl symlink function.
5594 if (&is_readonly_mode()) {
5595 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5598 my $src = &translate_filename($_[0]);
5599 my $dst = &translate_filename($_[1]);
5600 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5601 if ($gconfig{'debug_what_ops'});
5602 return symlink($src, $dst);
5605 =head2 link_file(src, dest)
5607 Creates a hard link, unless in read-only mode. The existing new link file
5608 will be deleted if necessary. Effectively the same as Perl's link function.
5613 if (&is_readonly_mode()) {
5614 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5617 my $src = &translate_filename($_[0]);
5618 my $dst = &translate_filename($_[1]);
5619 &webmin_debug_log('LINK', "src=$src dst=$dst")
5620 if ($gconfig{'debug_what_ops'});
5621 unlink($dst); # make sure link works
5622 return link($src, $dst);
5625 =head2 make_dir(dir, perms, recursive)
5627 Creates a directory and sets permissions on it, unless in read-only mode.
5628 The perms parameter sets the octal permissions to apply, which unlike Perl's
5629 mkdir will really get set. The recursive flag can be set to 1 to have the
5630 function create parent directories too.
5635 my ($dir, $perms, $recur) = @_;
5636 if (&is_readonly_mode()) {
5637 print STDERR "Vetoing directory $dir\n";
5640 $dir = &translate_filename($dir);
5641 my $exists = -d $dir ? 1 : 0;
5642 return 1 if ($exists && $recur); # already exists
5643 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5644 my $rv = mkdir($dir, $perms);
5645 if (!$rv && $recur) {
5646 # Failed .. try mkdir -p
5647 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5648 my $ex = &execute_command("mkdir $param "."e_path($dir));
5654 chmod($perms, $dir);
5659 =head2 set_ownership_permissions(user, group, perms, file, ...)
5661 Sets the user, group owner and permissions on some files. The parameters are :
5663 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5665 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5667 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5669 =item file - One or more files or directories to modify.
5672 sub set_ownership_permissions
5674 my ($user, $group, $perms, @files) = @_;
5675 if (&is_readonly_mode()) {
5676 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5679 @files = map { &translate_filename($_) } @files;
5680 if ($gconfig{'debug_what_ops'}) {
5681 foreach my $f (@files) {
5682 &webmin_debug_log('PERMS',
5683 "file=$f user=$user group=$group perms=$perms");
5687 if (defined($user)) {
5688 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5690 if (defined($group)) {
5691 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5694 my @uinfo = getpwuid($uid);
5697 $rv = chown($uid, $gid, @files);
5699 if ($rv && defined($perms)) {
5700 $rv = chmod($perms, @files);
5705 =head2 unlink_logged(file, ...)
5707 Like Perl's unlink function, but locks the files beforehand and un-locks them
5708 after so that the deletion is logged by Webmin.
5714 foreach my $f (@_) {
5715 if (!&test_lock($f)) {
5720 my @rv = &unlink_file(@_);
5721 foreach my $f (@_) {
5726 return wantarray ? @rv : $rv[0];
5729 =head2 unlink_file(file, ...)
5731 Deletes some files or directories. Like Perl's unlink function, but also
5732 recursively deletes directories with the rm command if needed.
5737 return 1 if (&is_readonly_mode());
5740 foreach my $f (@_) {
5741 &unflush_file_lines($f);
5742 my $realf = &translate_filename($f);
5743 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5745 if (!rmdir($realf)) {
5747 if ($gconfig{'os_type'} eq 'windows') {
5748 # Call del and rmdir commands
5751 my $out = `del /q "$qm" 2>&1`;
5753 $out = `rmdir "$qm" 2>&1`;
5758 my $qm = quotemeta($realf);
5759 $out = `rm -rf $qm 2>&1`;
5768 if (!unlink($realf)) {
5774 return wantarray ? ($rv, $err) : $rv;
5777 =head2 copy_source_dest(source, dest)
5779 Copy some file or directory to a new location. Returns 1 on success, or 0
5780 on failure - also sets $! on failure. If the source is a directory, uses
5781 piped tar commands to copy a whole directory structure including permissions
5785 sub copy_source_dest
5787 return (1, undef) if (&is_readonly_mode());
5788 my ($src, $dst) = @_;
5791 &webmin_debug_log('COPY', "src=$src dst=$dst")
5792 if ($gconfig{'debug_what_ops'});
5793 if ($gconfig{'os_type'} eq 'windows') {
5794 # No tar or cp on windows, so need to use copy command
5798 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5801 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5809 # A directory .. need to copy with tar command
5810 my @st = stat($src);
5813 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5814 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5821 # Can just copy with cp
5822 my $out = &backquote_logged("cp -p ".quotemeta($src).
5823 " ".quotemeta($dst)." 2>&1");
5829 return wantarray ? ($ok, $err) : $ok;
5832 =head2 remote_session_name(host|&server)
5834 Generates a session ID for some server. For this server, this will always
5835 be an empty string. For a server object it will include the hostname and
5836 port and PID. For a server name, it will include the hostname and PID. For
5840 sub remote_session_name
5842 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5843 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5844 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5845 ref($_[0]) ? "" : "$_[0].$$";
5848 =head2 remote_foreign_require(server, module, file)
5850 Connects to rpc.cgi on a remote webmin server and have it open a session
5851 to a process that will actually do the require and run functions. This is the
5852 equivalent for foreign_require, but for a remote Webmin system. The server
5853 parameter can either be a hostname of a system registered in the Webmin
5854 Servers Index module, or a hash reference for a system from that module.
5857 sub remote_foreign_require
5859 my $call = { 'action' => 'require',
5862 my $sn = &remote_session_name($_[0]);
5863 if ($remote_session{$sn}) {
5864 $call->{'session'} = $remote_session{$sn};
5867 $call->{'newsession'} = 1;
5869 my $rv = &remote_rpc_call($_[0], $call);
5870 if ($rv->{'session'}) {
5871 $remote_session{$sn} = $rv->{'session'};
5872 $remote_session_server{$sn} = $_[0];
5876 =head2 remote_foreign_call(server, module, function, [arg]*)
5878 Call a function on a remote server. Must have been setup first with
5879 remote_foreign_require for the same server and module. Equivalent to
5880 foreign_call, but with the extra server parameter to specify the remote
5884 sub remote_foreign_call
5886 return undef if (&is_readonly_mode());
5887 my $sn = &remote_session_name($_[0]);
5888 return &remote_rpc_call($_[0], { 'action' => 'call',
5891 'session' => $remote_session{$sn},
5892 'args' => [ @_[3 .. $#_] ] } );
5895 =head2 remote_foreign_check(server, module, [api-only])
5897 Checks if some module is installed and supported on a remote server. Equivilant
5898 to foreign_check, but for the remote Webmin system specified by the server
5902 sub remote_foreign_check
5904 return &remote_rpc_call($_[0], { 'action' => 'check',
5909 =head2 remote_foreign_config(server, module)
5911 Gets the configuration for some module from a remote server, as a hash.
5912 Equivalent to foreign_config, but for a remote system.
5915 sub remote_foreign_config
5917 return &remote_rpc_call($_[0], { 'action' => 'config',
5918 'module' => $_[1] });
5921 =head2 remote_eval(server, module, code)
5923 Evaluates some perl code in the context of a module on a remote webmin server.
5924 The server parameter must be the hostname of a remote system, module must
5925 be a module directory name, and code a string of Perl code to run. This can
5926 only be called after remote_foreign_require for the same server and module.
5931 return undef if (&is_readonly_mode());
5932 my $sn = &remote_session_name($_[0]);
5933 return &remote_rpc_call($_[0], { 'action' => 'eval',
5936 'session' => $remote_session{$sn} });
5939 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5941 Transfers some local file to another server via Webmin's RPC protocol, and
5942 returns the resulting remote filename. If the remotefile parameter is given,
5943 that is the destination filename which will be used. Otherwise a randomly
5944 selected temporary filename will be used, and returned by the function.
5949 return undef if (&is_readonly_mode());
5951 my $sn = &remote_session_name($_[0]);
5952 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5953 # Copy data over TCP connection
5954 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5956 'name' => $_[3] } );
5958 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5959 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5960 return &$main::remote_error_handler("Failed to transfer file : $error")
5963 while(read(FILE, $got, 1024) > 0) {
5967 shutdown(TWRITE, 1);
5969 if ($error && $error !~ /^OK/) {
5970 # Got back an error!
5971 return &$main::remote_error_handler("Failed to transfer file : $error");
5977 # Just pass file contents as parameters
5979 while(read(FILE, $got, 1024) > 0) {
5983 return &remote_rpc_call($_[0], { 'action' => 'write',
5986 'session' => $remote_session{$sn} });
5990 =head2 remote_read(server, localfile, remotefile)
5992 Transfers a file from a remote server to this system, using Webmin's RPC
5993 protocol. The server parameter must be the hostname of a system registered
5994 in the Webmin Servers Index module, localfile is the destination path on this
5995 system, and remotefile is the file to fetch from the remote server.
6000 my $sn = &remote_session_name($_[0]);
6001 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6002 # Copy data over TCP connection
6003 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
6004 'file' => $_[2] } );
6006 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
6009 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6010 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
6011 return &$main::remote_error_handler("Failed to transfer file : $error")
6014 open(FILE, ">$_[1]");
6015 while(read(TREAD, $got, 1024) > 0) {
6022 # Just get data as return value
6023 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
6025 'session' => $remote_session{$sn} });
6026 open(FILE, ">$_[1]");
6032 =head2 remote_finished
6034 Close all remote sessions. This happens automatically after a while
6035 anyway, but this function should be called to clean things up faster.
6040 foreach my $sn (keys %remote_session) {
6041 my $server = $remote_session_server{$sn};
6042 &remote_rpc_call($server, { 'action' => 'quit',
6043 'session' => $remote_session{$sn} } );
6044 delete($remote_session{$sn});
6045 delete($remote_session_server{$sn});
6047 foreach my $fh (keys %fast_fh_cache) {
6049 delete($fast_fh_cache{$fh});
6053 =head2 remote_error_setup(&function)
6055 Sets a function to be called instead of &error when a remote RPC operation
6056 fails. Useful if you want to have more control over your remote operations.
6059 sub remote_error_setup
6061 $main::remote_error_handler = $_[0] || \&error;
6064 =head2 remote_rpc_call(server, &structure)
6066 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
6067 and then reads back a reply structure. This is mainly for internal use only,
6068 and is called by the other remote_* functions.
6074 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
6076 # Server structure was given
6078 $serv->{'user'} || $serv->{'id'} == 0 ||
6079 return &$main::remote_error_handler(
6080 "No Webmin login set for server");
6083 # lookup the server in the webmin servers module if needed
6084 if (!%main::remote_servers_cache) {
6085 &foreign_require("servers", "servers-lib.pl");
6086 foreach $s (&foreign_call("servers", "list_servers")) {
6087 $main::remote_servers_cache{$s->{'host'}} = $s;
6088 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
6091 $serv = $main::remote_servers_cache{$_[0]};
6092 $serv || return &$main::remote_error_handler(
6093 "No Webmin Servers entry for $_[0]");
6094 $serv->{'user'} || return &$main::remote_error_handler(
6095 "No login set for server $_[0]");
6097 my $ip = $serv->{'ip'} || $serv->{'host'};
6099 # Work out the username and password
6101 if ($serv->{'sameuser'}) {
6102 $user = $remote_user;
6103 defined($main::remote_pass) || return &$main::remote_error_handler(
6104 "Password for this server is not available");
6105 $pass = $main::remote_pass;
6108 $user = $serv->{'user'};
6109 $pass = $serv->{'pass'};
6112 if ($serv->{'fast'} || !$sn) {
6113 # Make TCP connection call to fastrpc.cgi
6114 if (!$fast_fh_cache{$sn} && $sn) {
6115 # Need to open the connection
6116 my $con = &make_http_connection(
6117 $ip, $serv->{'port'}, $serv->{'ssl'},
6118 "POST", "/fastrpc.cgi");
6119 return &$main::remote_error_handler(
6120 "Failed to connect to $serv->{'host'} : $con")
6122 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6123 &write_http_connection($con, "User-agent: Webmin\r\n");
6124 my $auth = &encode_base64("$user:$pass");
6126 &write_http_connection($con, "Authorization: basic $auth\r\n");
6127 &write_http_connection($con, "Content-length: ",
6128 length($tostr),"\r\n");
6129 &write_http_connection($con, "\r\n");
6130 &write_http_connection($con, $tostr);
6132 # read back the response
6133 my $line = &read_http_connection($con);
6134 $line =~ tr/\r\n//d;
6135 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6136 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6138 $line =~ /^HTTP\/1\..\s+200\s+/ ||
6139 return &$main::remote_error_handler("HTTP error : $line");
6141 $line = &read_http_connection($con);
6142 $line =~ tr/\r\n//d;
6144 $line = &read_http_connection($con);
6145 if ($line =~ /^0\s+(.*)/) {
6146 return &$main::remote_error_handler("RPC error : $1");
6148 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
6149 $line =~ /^1\s+(\S+)\s+(\S+)/) {
6150 # Started ok .. connect and save SID
6151 &close_http_connection($con);
6152 my ($port, $sid, $version, $error) = ($1, $2, $3);
6153 &open_socket($ip, $port, $sid, \$error);
6154 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
6156 $fast_fh_cache{$sn} = $sid;
6157 $remote_server_version{$sn} = $version;
6160 while($stuff = &read_http_connection($con)) {
6163 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
6166 elsif (!$fast_fh_cache{$sn}) {
6167 # Open the connection by running fastrpc.cgi locally
6168 pipe(RPCOUTr, RPCOUTw);
6172 open(STDOUT, ">&RPCOUTw");
6176 $ENV{'REQUEST_METHOD'} = 'GET';
6177 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6178 $ENV{'SERVER_ROOT'} ||= $root_directory;
6180 if ($base_remote_user ne 'root' &&
6181 $base_remote_user ne 'admin') {
6182 # Need to fake up a login for the CGI!
6183 &read_acl(undef, \%acl, [ 'root' ]);
6184 $ENV{'BASE_REMOTE_USER'} =
6185 $ENV{'REMOTE_USER'} =
6186 $acl{'root'} ? 'root' : 'admin';
6188 delete($ENV{'FOREIGN_MODULE_NAME'});
6189 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6190 chdir($root_directory);
6191 if (!exec("$root_directory/fastrpc.cgi")) {
6192 print "exec failed : $!\n";
6199 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6203 if ($line =~ /^0\s+(.*)/) {
6204 return &$main::remote_error_handler("RPC error : $2");
6206 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6207 # Started ok .. connect and save SID
6209 my ($port, $sid, $error) = ($1, $2, undef);
6210 &open_socket("localhost", $port, $sid, \$error);
6211 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6212 $fast_fh_cache{$sn} = $sid;
6219 &error("Bad response from fastrpc.cgi : $line");
6222 # Got a connection .. send off the request
6223 my $fh = $fast_fh_cache{$sn};
6224 my $tostr = &serialise_variable($_[1]);
6225 print $fh length($tostr)," $fh\n";
6229 return &$main::remote_error_handler(
6230 "Error reading response length from fastrpc.cgi : $!")
6232 my $rlen = int($rstr);
6233 my ($fromstr, $got);
6234 while(length($fromstr) < $rlen) {
6235 return &$main::remote_error_handler(
6236 "Failed to read from fastrpc.cgi : $!")
6237 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6240 my $from = &unserialise_variable($fromstr);
6242 # No response at all
6243 return &$main::remote_error_handler("Remote Webmin error");
6245 elsif (ref($from) ne 'HASH') {
6247 return &$main::remote_error_handler(
6248 "Invalid remote Webmin response : $from");
6250 elsif (!$from->{'status'}) {
6252 $from->{'rv'} =~ s/\s+at\s+(\S+)\s+line\s+(\d+)(,\s+<\S+>\s+line\s+(\d+))?//;
6253 return &$main::remote_error_handler($from->{'rv'});
6255 if (defined($from->{'arv'})) {
6256 return @{$from->{'arv'}};
6259 return $from->{'rv'};
6263 # Call rpc.cgi on remote server
6264 my $tostr = &serialise_variable($_[1]);
6266 my $con = &make_http_connection($ip, $serv->{'port'},
6267 $serv->{'ssl'}, "POST", "/rpc.cgi");
6268 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6270 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6271 &write_http_connection($con, "User-agent: Webmin\r\n");
6272 my $auth = &encode_base64("$user:$pass");
6274 &write_http_connection($con, "Authorization: basic $auth\r\n");
6275 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6276 &write_http_connection($con, "\r\n");
6277 &write_http_connection($con, $tostr);
6279 # read back the response
6280 my $line = &read_http_connection($con);
6281 $line =~ tr/\r\n//d;
6282 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6283 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6285 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6287 $line = &read_http_connection($con);
6288 $line =~ tr/\r\n//d;
6291 while($line = &read_http_connection($con)) {
6295 my $from = &unserialise_variable($fromstr);
6296 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6297 if (defined($from->{'arv'})) {
6298 return @{$from->{'arv'}};
6301 return $from->{'rv'};
6306 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6308 Executes some function in parallel on multiple servers at once. Fills in
6309 the returns and errors arrays respectively. If the module and library
6310 parameters are given, that module is remotely required on the server first,
6311 to check if it is connectable. The parameters are :
6313 =item servers - A list of Webmin system hash references.
6315 =item parallel - Number of parallel operations to perform.
6317 =item function - Reference to function to call for each system.
6319 =item args - Additional parameters to the function.
6321 =item returns - Array ref to place return values into, in same order as servers.
6323 =item errors - Array ref to place error messages into.
6325 =item module - Optional module to require on the remote system first.
6327 =item library - Optional library to require in the module.
6330 sub remote_multi_callback
6332 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6333 &remote_error_setup(\&remote_multi_callback_error);
6335 # Call the functions
6337 foreach my $g (@$servs) {
6343 $remote_multi_callback_err = undef;
6345 # Require the remote lib
6346 &remote_foreign_require($g->{'host'}, $mod, $lib);
6347 if ($remote_multi_callback_err) {
6348 # Failed .. return error
6349 print $wh &serialise_variable(
6350 [ undef, $remote_multi_callback_err ]);
6356 my $a = ref($args) ? $args->[$p] : $args;
6357 my $rv = &$func($g, $a);
6360 print $wh &serialise_variable(
6361 [ $rv, $remote_multi_callback_err ]);
6369 # Read back the results
6371 foreach my $g (@$servs) {
6375 $errs->[$p] = "Failed to read response from $g->{'host'}";
6378 my $rv = &unserialise_variable($line);
6380 $rets->[$p] = $rv->[0];
6381 $errs->[$p] = $rv->[1];
6386 &remote_error_setup(undef);
6389 sub remote_multi_callback_error
6391 $remote_multi_callback_err = $_[0];
6394 =head2 serialise_variable(variable)
6396 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6397 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6398 called on each member to serialize the entire object.
6401 sub serialise_variable
6403 if (!defined($_[0])) {
6409 $rv = &urlize($_[0]);
6411 elsif ($r eq 'SCALAR') {
6412 $rv = &urlize(${$_[0]});
6414 elsif ($r eq 'ARRAY') {
6415 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6417 elsif ($r eq 'HASH') {
6418 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6419 &urlize(&serialise_variable($_[0]->{$_})) }
6422 elsif ($r eq 'REF') {
6423 $rv = &serialise_variable(${$_[0]});
6425 elsif ($r eq 'CODE') {
6430 # An object - treat as a hash
6431 $r = "OBJECT ".&urlize($r);
6432 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6433 &urlize(&serialise_variable($_[0]->{$_})) }
6436 return ($r ? $r : 'VAL').",".$rv;
6439 =head2 unserialise_variable(string)
6441 Converts a string created by serialise_variable() back into the original
6442 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6443 object, the same class is used on this system, if available.
6446 sub unserialise_variable
6448 my @v = split(/,/, $_[0]);
6450 if ($v[0] eq 'VAL') {
6451 @v = split(/,/, $_[0], -1);
6452 $rv = &un_urlize($v[1]);
6454 elsif ($v[0] eq 'SCALAR') {
6455 local $r = &un_urlize($v[1]);
6458 elsif ($v[0] eq 'ARRAY') {
6460 for(my $i=1; $i<@v; $i++) {
6461 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6464 elsif ($v[0] eq 'HASH') {
6466 for(my $i=1; $i<@v; $i+=2) {
6467 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6468 &unserialise_variable(&un_urlize($v[$i+1]));
6471 elsif ($v[0] eq 'REF') {
6472 local $r = &unserialise_variable($v[1]);
6475 elsif ($v[0] eq 'UNDEF') {
6478 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6479 # An object hash that we have to re-bless
6482 for(my $i=1; $i<@v; $i+=2) {
6483 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6484 &unserialise_variable(&un_urlize($v[$i+1]));
6492 =head2 other_groups(user)
6494 Returns a list of secondary groups a user is a member of, as a list of
6503 while(my @g = getgrent()) {
6504 my @m = split(/\s+/, $g[3]);
6505 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6507 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6511 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6513 Returns HTML for a button that pops up a data chooser window. The parameters
6516 =item dayfield - Name of the text field to place the day of the month into.
6518 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6520 =item yearfield - Name of the text field to place the year into.
6523 sub date_chooser_button
6525 return &theme_date_chooser_button(@_)
6526 if (defined(&theme_date_chooser_button));
6527 my ($w, $h) = (250, 225);
6528 if ($gconfig{'db_sizedate'}) {
6529 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6531 return "<input type=button onClick='window.dfield = form.$_[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";
6534 =head2 help_file(module, file)
6536 Returns the path to a module's help file of some name, typically under the
6537 help directory with a .html extension.
6542 my $mdir = &module_root_directory($_[0]);
6543 my $dir = "$mdir/help";
6544 foreach my $o (@lang_order_list) {
6545 my $lang = "$dir/$_[1].$o.html";
6546 return $lang if (-r $lang);
6548 return "$dir/$_[1].html";
6553 Seeds the random number generator, if not already done in this script. On Linux
6554 this makes use of the current time, process ID and a read from /dev/urandom.
6555 On other systems, only the current time and process ID are used.
6560 if (!$main::done_seed_random) {
6561 if (open(RANDOM, "/dev/urandom")) {
6563 read(RANDOM, $buf, 4);
6565 srand(time() ^ $$ ^ $buf);
6570 $main::done_seed_random = 1;
6574 =head2 disk_usage_kb(directory)
6576 Returns the number of kB used by some directory and all subdirs. Implemented
6577 by calling the C<du -k> command.
6582 my $dir = &translate_filename($_[0]);
6584 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6586 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6588 return $out =~ /^([0-9]+)/ ? $1 : "???";
6591 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6593 Returns the number of bytes taken up by all files in some directory and all
6594 sub-directories, by summing up their lengths. The disk_usage_kb is more
6595 reflective of reality, as the filesystem typically pads file sizes to 1k or
6599 sub recursive_disk_usage
6601 my $dir = &translate_filename($_[0]);
6608 my @st = stat($dir);
6614 my @files = readdir(DIR);
6616 foreach my $f (@files) {
6617 next if ($f eq "." || $f eq "..");
6618 next if ($skip && $f =~ /$skip/);
6619 next if ($only && $f !~ /$only/);
6620 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6626 =head2 help_search_link(term, [ section, ... ] )
6628 Returns HTML for a link to the man module for searching local and online
6629 docs for various search terms. The term parameter can either be a single
6630 word like 'bind', or a space-separated list of words. This function is typically
6631 used by modules that want to refer users to additional documentation in man
6632 pages or local system doc files.
6635 sub help_search_link
6637 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6638 my $for = &urlize(shift(@_));
6639 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6640 join("&", map { "section=$_" } @_)."&".
6641 "for=$for&exact=1&check=".&get_module_name()."'>".
6642 $text{'helpsearch'}."</a>\n";
6649 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6651 Opens a connection to some HTTP server, maybe through a proxy, and returns
6652 a handle object. The handle can then be used to send additional headers
6653 and read back a response. If anything goes wrong, returns an error string.
6654 The parameters are :
6656 =item host - Hostname or IP address of the webserver to connect to.
6658 =item port - HTTP port number to connect to.
6660 =item ssl - Set to 1 to connect in SSL mode.
6662 =item method - HTTP method, like GET or POST.
6664 =item page - Page to request on the webserver, like /foo/index.html
6666 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6669 sub make_http_connection
6671 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6674 foreach my $h (@$headers) {
6675 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6679 if (&is_readonly_mode()) {
6680 return "HTTP connections not allowed in readonly mode";
6682 my $rv = { 'fh' => time().$$ };
6685 eval "use Net::SSLeay";
6686 $@ && return $text{'link_essl'};
6687 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6688 eval "Net::SSLeay::load_error_strings()";
6689 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6690 return "Failed to create SSL context";
6691 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6692 return "Failed to create SSL connection";
6694 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6695 !&no_proxy($host)) {
6698 &open_socket($1, $2, $rv->{'fh'}, \$error);
6701 my $fh = $rv->{'fh'};
6702 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6703 if ($gconfig{'proxy_user'}) {
6704 my $auth = &encode_base64(
6705 "$gconfig{'proxy_user'}:".
6706 "$gconfig{'proxy_pass'}");
6707 $auth =~ tr/\r\n//d;
6708 print $fh "Proxy-Authorization: Basic $auth\r\n";
6712 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6713 return "Proxy error : $3" if ($2 != 200);
6716 return "Proxy error : $line";
6721 elsif (!$gconfig{'proxy_fallback'}) {
6722 # Connection to proxy failed - give up
6729 &open_socket($host, $port, $rv->{'fh'}, \$error);
6730 return $error if ($error);
6732 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6733 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6734 return "SSL connect() failed";
6735 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6736 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6739 # Plain HTTP request
6741 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6742 !&no_proxy($host)) {
6745 &open_socket($1, $2, $rv->{'fh'}, \$error);
6749 my $fh = $rv->{'fh'};
6750 my $rtxt = $method." ".
6751 "http://$host:$port$page HTTP/1.0\r\n";
6752 if ($gconfig{'proxy_user'}) {
6753 my $auth = &encode_base64(
6754 "$gconfig{'proxy_user'}:".
6755 "$gconfig{'proxy_pass'}");
6756 $auth =~ tr/\r\n//d;
6757 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6762 elsif (!$gconfig{'proxy_fallback'}) {
6767 # Connecting directly
6769 &open_socket($host, $port, $rv->{'fh'}, \$error);
6770 return $error if ($error);
6771 my $fh = $rv->{'fh'};
6772 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6779 =head2 read_http_connection(&handle, [bytes])
6781 Reads either one line or up to the specified number of bytes from the handle,
6782 originally supplied by make_http_connection.
6785 sub read_http_connection
6789 if ($h->{'ssl_con'}) {
6792 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6793 # need to read more..
6794 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6796 $rv = $h->{'buffer'};
6797 delete($h->{'buffer'});
6800 $h->{'buffer'} .= $more;
6802 $rv = substr($h->{'buffer'}, 0, $idx+1);
6803 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6806 if (length($h->{'buffer'})) {
6807 $rv = $h->{'buffer'};
6808 delete($h->{'buffer'});
6811 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6817 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6820 my $fh = $h->{'fh'};
6824 $rv = undef if ($rv eq "");
6828 =head2 write_http_connection(&handle, [data+])
6830 Writes the given data to the given HTTP connection handle.
6833 sub write_http_connection
6836 my $fh = $h->{'fh'};
6838 if ($h->{'ssl_ctx'}) {
6839 foreach my $s (@_) {
6840 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6841 $allok = 0 if (!$ok);
6845 my $ok = (print $fh @_);
6846 $allok = 0 if (!$ok);
6851 =head2 close_http_connection(&handle)
6853 Closes a connection to an HTTP server, identified by the given handle.
6856 sub close_http_connection
6862 =head2 clean_environment
6864 Deletes any environment variables inherited from miniserv so that they
6865 won't be passed to programs started by webmin. This is useful when calling
6866 programs that check for CGI-related environment variables and modify their
6867 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6870 sub clean_environment
6872 %UNCLEAN_ENV = %ENV;
6873 foreach my $k (keys %ENV) {
6874 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6878 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6879 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6880 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6881 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6882 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6883 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6884 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6885 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6891 =head2 reset_environment
6893 Puts the environment back how it was before clean_environment was callled.
6896 sub reset_environment
6899 foreach my $k (keys %UNCLEAN_ENV) {
6900 $ENV{$k} = $UNCLEAN_ENV{$k};
6902 undef(%UNCLEAN_ENV);
6906 =head2 progress_callback
6908 Never called directly, but useful for passing to &http_download to print
6909 out progress of an HTTP request.
6912 sub progress_callback
6914 if (defined(&theme_progress_callback)) {
6915 # Call the theme override
6916 return &theme_progress_callback(@_);
6920 print $progress_callback_prefix;
6922 $progress_size = $_[1];
6923 $progress_step = int($_[1] / 10);
6924 print &text('progress_size2', $progress_callback_url,
6925 &nice_size($progress_size)),"<br>\n";
6928 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6930 $last_progress_time = $last_progress_size = undef;
6932 elsif ($_[0] == 3) {
6934 my $sp = $progress_callback_prefix.(" " x 5);
6935 if ($progress_size) {
6936 # And we have a size to compare against
6937 my $st = int(($_[1] * 10) / $progress_size);
6938 my $time_now = time();
6939 if ($st != $progress_step ||
6940 $time_now - $last_progress_time > 60) {
6941 # Show progress every 10% or 60 seconds
6942 print $sp,&text('progress_datan', &nice_size($_[1]),
6943 int($_[1]*100/$progress_size)),"<br>\n";
6944 $last_progress_time = $time_now;
6946 $progress_step = $st;
6949 # No total size .. so only show in 100k jumps
6950 if ($_[1] > $last_progress_size+100*1024) {
6951 print $sp,&text('progress_data2n',
6952 &nice_size($_[1])),"<br>\n";
6953 $last_progress_size = $_[1];
6957 elsif ($_[0] == 4) {
6958 # All done downloading
6959 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6961 elsif ($_[0] == 5) {
6962 # Got new location after redirect
6963 $progress_callback_url = $_[1];
6965 elsif ($_[0] == 6) {
6967 $progress_callback_url = $_[1];
6968 print &text('progress_incache', $progress_callback_url),"<br>\n";
6972 =head2 switch_to_remote_user
6974 Changes the user and group of the current process to that of the unix user
6975 with the same name as the current webmin login, or fails if there is none.
6976 This should be called by Usermin module scripts that only need to run with
6977 limited permissions.
6980 sub switch_to_remote_user
6982 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6984 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6985 &create_missing_homedir(\@remote_user_info);
6987 &switch_to_unix_user(\@remote_user_info);
6988 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6989 $ENV{'HOME'} = $remote_user_info[7];
6991 # Export global variables to caller
6992 if ($main::export_to_caller) {
6993 my ($callpkg) = caller();
6994 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6998 =head2 switch_to_unix_user(&user-details)
7000 Switches the current process to the UID and group ID from the given list
7001 of user details, which must be in the format returned by getpwnam.
7004 sub switch_to_unix_user
7007 if (!defined($uinfo->[0])) {
7008 # No username given, so just use given GID
7009 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
7012 # Use all groups from user
7013 ($(, $)) = ( $uinfo->[3],
7014 "$uinfo->[3] ".join(" ", $uinfo->[3],
7015 &other_groups($uinfo->[0])) );
7018 POSIX::setuid($uinfo->[2]);
7020 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
7021 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
7025 =head2 eval_as_unix_user(username, &code)
7027 Runs some code fragment with the effective UID and GID switch to that
7028 of the given Unix user, so that file IO takes place with his permissions.
7032 sub eval_as_unix_user
7034 my ($user, $code) = @_;
7035 my @uinfo = getpwnam($user);
7036 if (!scalar(@uinfo)) {
7037 &error("eval_as_unix_user called with invalid user $user");
7039 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
7043 local $main::error_must_die = 1;
7050 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
7053 return wantarray ? @rv : $rv[0];
7056 =head2 create_user_config_dirs
7058 Creates per-user config directories and sets $user_config_directory and
7059 $user_module_config_directory to them. Also reads per-user module configs
7060 into %userconfig. This should be called by Usermin module scripts that need
7061 to store per-user preferences or other settings.
7064 sub create_user_config_dirs
7066 return if (!$gconfig{'userconfig'});
7067 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
7068 return if (!@uinfo || !$uinfo[7]);
7069 &create_missing_homedir(\@uinfo);
7070 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
7071 if (!-d $user_config_directory) {
7072 mkdir($user_config_directory, 0700) ||
7073 &error("Failed to create $user_config_directory : $!");
7074 if ($< == 0 && $uinfo[2]) {
7075 chown($uinfo[2], $uinfo[3], $user_config_directory);
7078 if (&get_module_name()) {
7079 $user_module_config_directory = $user_config_directory."/".
7081 if (!-d $user_module_config_directory) {
7082 mkdir($user_module_config_directory, 0700) ||
7083 &error("Failed to create $user_module_config_directory : $!");
7084 if ($< == 0 && $uinfo[2]) {
7085 chown($uinfo[2], $uinfo[3], $user_config_directory);
7089 &read_file_cached("$module_root_directory/defaultuconfig",
7091 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
7092 &read_file_cached("$user_module_config_directory/config",
7096 # Export global variables to caller
7097 if ($main::export_to_caller) {
7098 my ($callpkg) = caller();
7099 foreach my $v ('$user_config_directory',
7100 '$user_module_config_directory', '%userconfig') {
7101 my ($vt, $vn) = split('', $v, 2);
7102 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
7107 =head2 create_missing_homedir(&uinfo)
7109 If auto homedir creation is enabled, create one for this user if needed.
7110 For internal use only.
7113 sub create_missing_homedir
7116 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
7117 # Use has no home dir .. make one
7118 system("mkdir -p ".quotemeta($uinfo->[7]));
7119 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
7120 if ($gconfig{'create_homedir_perms'} ne '') {
7121 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
7126 =head2 filter_javascript(text)
7128 Disables all javascript <script>, onClick= and so on tags in the given HTML,
7129 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
7132 sub filter_javascript
7135 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
7136 $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;
7137 $rv =~ s/(javascript:)/x$1/gi;
7138 $rv =~ s/(vbscript:)/x$1/gi;
7142 =head2 resolve_links(path)
7144 Given a path that may contain symbolic links, returns the real path.
7150 $path =~ s/\/+/\//g;
7151 $path =~ s/\/$// if ($path ne "/");
7152 my @p = split(/\/+/, $path);
7154 for(my $i=0; $i<@p; $i++) {
7155 my $sofar = "/".join("/", @p[0..$i]);
7156 my $lnk = readlink($sofar);
7157 if ($lnk eq $sofar) {
7158 # Link to itself! Cannot do anything more really ..
7161 elsif ($lnk =~ /^\//) {
7162 # Link is absolute..
7163 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
7167 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
7173 =head2 simplify_path(path, bogus)
7175 Given a path, maybe containing elements ".." and "." , convert it to a
7176 clean, absolute form. Returns undef if this is not possible.
7184 my @bits = split(/\/+/, $dir);
7187 foreach my $b (@bits) {
7191 elsif ($b eq "..") {
7193 if (scalar(@fixedbits) == 0) {
7194 # Cannot! Already at root!
7201 push(@fixedbits, $b);
7204 return "/".join('/', @fixedbits);
7207 =head2 same_file(file1, file2)
7209 Returns 1 if two files are actually the same
7214 return 1 if ($_[0] eq $_[1]);
7215 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7216 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7217 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7218 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7219 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7220 return 0 if (!@stat1 || !@stat2);
7221 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7224 =head2 flush_webmin_caches
7226 Clears all in-memory and on-disk caches used by Webmin.
7229 sub flush_webmin_caches
7231 undef(%main::read_file_cache);
7232 undef(%main::acl_hash_cache);
7233 undef(%main::acl_array_cache);
7234 undef(%main::has_command_cache);
7235 undef(@main::list_languages_cache);
7236 undef($main::got_list_usermods_cache);
7237 undef(@main::list_usermods_cache);
7238 undef(%main::foreign_installed_cache);
7239 unlink("$config_directory/module.infos.cache");
7240 &get_all_module_infos();
7243 =head2 list_usermods
7245 Returns a list of additional module restrictions. For internal use in
7251 if (!$main::got_list_usermods_cache) {
7252 @main::list_usermods_cache = ( );
7254 open(USERMODS, "$config_directory/usermin.mods");
7256 if (/^([^:]+):(\+|-|):(.*)/) {
7257 push(@main::list_usermods_cache,
7258 [ $1, $2, [ split(/\s+/, $3) ] ]);
7262 $main::got_list_usermods_cache = 1;
7264 return @main::list_usermods_cache;
7267 =head2 available_usermods(&allmods, &usermods)
7269 Returns a list of modules that are available to the given user, based
7270 on usermod additional/subtractions. For internal use by Usermin only.
7273 sub available_usermods
7275 return @{$_[0]} if (!@{$_[1]});
7277 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7278 my @uinfo = @remote_user_info;
7279 @uinfo = getpwnam($remote_user) if (!@uinfo);
7280 foreach my $u (@{$_[1]}) {
7282 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7285 elsif ($u->[0] =~ /^\@(.*)$/) {
7286 # Check for group membership
7287 my @ginfo = getgrnam($1);
7288 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7289 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7291 elsif ($u->[0] =~ /^\//) {
7292 # Check users and groups in file
7294 open(USERFILE, $u->[0]);
7297 if ($_ eq $remote_user) {
7300 elsif (/^\@(.*)$/) {
7301 my @ginfo = getgrnam($1);
7303 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7304 &indexof($remote_user,
7305 split(/\s+/, $ginfo[3])) >= 0));
7312 if ($u->[1] eq "+") {
7313 map { $mods{$_}++ } @{$u->[2]};
7315 elsif ($u->[1] eq "-") {
7316 map { delete($mods{$_}) } @{$u->[2]};
7320 map { $mods{$_}++ } @{$u->[2]};
7324 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7327 =head2 get_available_module_infos(nocache)
7329 Returns a list of modules available to the current user, based on
7330 operating system support, access control and usermod restrictions. Useful
7331 in themes that need to display a list of modules the user can use.
7332 Each element of the returned array is a hash reference in the same format as
7333 returned by get_module_info.
7336 sub get_available_module_infos
7339 &read_acl(\%acl, \%uacl, [ $base_remote_user ]);
7340 my $risk = $gconfig{'risk_'.$base_remote_user};
7342 foreach my $minfo (&get_all_module_infos($_[0])) {
7343 next if (!&check_os_support($minfo));
7345 # Check module risk level
7346 next if ($risk ne 'high' && $minfo->{'risk'} &&
7347 $minfo->{'risk'} !~ /$risk/);
7351 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7352 !$acl{$base_remote_user,"*"});
7354 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7358 # Check usermod restrictions
7359 my @usermods = &list_usermods();
7360 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7361 &available_usermods(\@rv, \@usermods);
7363 # Check RBAC restrictions
7365 foreach my $m (@rv) {
7366 if (&supports_rbac($m->{'dir'}) &&
7367 &use_rbac_module_acl(undef, $m->{'dir'})) {
7368 local $rbacs = &get_rbac_module_acl($remote_user,
7376 # Module or system doesn't support RBAC
7377 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7383 if (defined(&theme_foreign_available)) {
7384 foreach my $m (@rbacrv) {
7385 if (&theme_foreign_available($m->{'dir'})) {
7394 # Check licence module vetos
7396 if ($main::licence_module) {
7397 foreach my $m (@themerv) {
7398 if (&foreign_call($main::licence_module,
7399 "check_module_licence", $m->{'dir'})) {
7411 =head2 get_visible_module_infos(nocache)
7413 Like get_available_module_infos, but excludes hidden modules from the list.
7414 Each element of the returned array is a hash reference in the same format as
7415 returned by get_module_info.
7418 sub get_visible_module_infos
7421 my $pn = &get_product_name();
7422 return grep { !$_->{'hidden'} &&
7423 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7426 =head2 get_visible_modules_categories(nocache)
7428 Returns a list of Webmin module categories, each of which is a hash ref
7429 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7430 of modules in the category, in the format returned by get_module_info.
7431 Un-used modules are automatically assigned to the 'unused' category, and
7432 those with no category are put into 'others'.
7435 sub get_visible_modules_categories
7438 my @mods = &get_visible_module_infos($nocache);
7440 if (&get_product_name() eq 'webmin') {
7441 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7442 @mods = grep { $_->{'installed'} ne '0' } @mods;
7444 my %cats = &list_categories(\@mods);
7446 foreach my $c (keys %cats) {
7447 my $cat = { 'code' => $c || 'other',
7448 'desc' => $cats{$c} };
7449 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7452 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7453 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7455 # Add un-installed modules in magic category
7456 my $cat = { 'code' => 'unused',
7457 'desc' => $text{'main_unused'},
7459 'modules' => \@unmods };
7465 =head2 is_under_directory(directory, file)
7467 Returns 1 if the given file is under the specified directory, 0 if not.
7468 Symlinks are taken into account in the file to find it's 'real' location.
7471 sub is_under_directory
7473 my ($dir, $file) = @_;
7474 return 1 if ($dir eq "/");
7475 return 0 if ($file =~ /\.\./);
7476 my $ld = &resolve_links($dir);
7478 return &is_under_directory($ld, $file);
7480 my $lp = &resolve_links($file);
7482 return &is_under_directory($dir, $lp);
7484 return 0 if (length($file) < length($dir));
7485 return 1 if ($dir eq $file);
7487 return substr($file, 0, length($dir)) eq $dir;
7490 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7492 Given an absolute URL, returns the host, port, page and ssl flag components.
7493 If a username and password are given before the hostname, return those too.
7494 Relative URLs can also be parsed, if the base information is provided.
7499 if ($_[0] =~ /^(http|https):\/\/([^\@]+\@)?\[([^\]]+)\](:(\d+))?(\/\S*)?$/ ||
7500 $_[0] =~ /^(http|https):\/\/([^\@]+\@)?([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7502 my $ssl = $1 eq 'https';
7503 my @rv = ($3, $4 ? $5 : $ssl ? 443 : 80, $6 || "/", $ssl);
7504 if ($2 =~ /^([^:]+):(\S+)\@/) {
7513 elsif ($_[0] =~ /^\/\S*$/) {
7514 # A relative to the server URL
7515 return ($_[1], $_[2], $_[0], $_[4], $_[5], $_[6]);
7518 # A relative to the directory URL
7520 $page =~ s/[^\/]+$//;
7521 return ($_[1], $_[2], $page.$_[0], $_[4], $_[5], $_[6]);
7525 =head2 check_clicks_function
7527 Returns HTML for a JavaScript function called check_clicks that returns
7528 true when first called, but false subsequently. Useful on onClick for
7529 critical buttons. Deprecated, as this method of preventing duplicate actions
7533 sub check_clicks_function
7538 function check_clicks(form)
7545 for(i=0; i<form.length; i++)
7546 form.elements[i].disabled = true;
7555 =head2 load_entities_map
7557 Returns a hash ref containing mappings between HTML entities (like ouml) and
7558 ascii values (like 246). Mainly for internal use.
7561 sub load_entities_map
7563 if (!%entities_map_cache) {
7565 open(EMAP, "$root_directory/entities_map.txt");
7567 if (/^(\d+)\s+(\S+)/) {
7568 $entities_map_cache{$2} = $1;
7573 return \%entities_map_cache;
7576 =head2 entities_to_ascii(string)
7578 Given a string containing HTML entities like ö and 7, replace them
7579 with their ASCII equivalents.
7582 sub entities_to_ascii
7585 my $emap = &load_entities_map();
7586 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7587 $str =~ s/&#(\d+);/chr($1)/ge;
7591 =head2 get_product_name
7593 Returns either 'webmin' or 'usermin', depending on which program the current
7594 module is in. Useful for modules that can be installed into either.
7597 sub get_product_name
7599 return $gconfig{'product'} if (defined($gconfig{'product'}));
7600 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7605 Returns the character set for the current language, such as iso-8859-1.
7610 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7611 $current_lang_info->{'charset'} ?
7612 $current_lang_info->{'charset'} : $default_charset;
7616 =head2 get_display_hostname
7618 Returns the system's hostname for UI display purposes. This may be different
7619 from the actual hostname if you administrator has configured it so in the
7620 Webmin Configuration module.
7623 sub get_display_hostname
7625 if ($gconfig{'hostnamemode'} == 0) {
7626 return &get_system_hostname();
7628 elsif ($gconfig{'hostnamemode'} == 3) {
7629 return $gconfig{'hostnamedisplay'};
7632 my $h = $ENV{'HTTP_HOST'};
7634 if ($gconfig{'hostnamemode'} == 2) {
7635 $h =~ s/^(www|ftp|mail)\.//i;
7641 =head2 save_module_config([&config], [modulename])
7643 Saves the configuration for some module. The config parameter is an optional
7644 hash reference of names and values to save, which defaults to the global
7645 %config hash. The modulename parameter is the module to update the config
7646 file, which defaults to the current module.
7649 sub save_module_config
7651 my $c = $_[0] || { &get_module_variable('%config') };
7652 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7653 &write_file("$config_directory/$m/config", $c);
7656 =head2 save_user_module_config([&config], [modulename])
7658 Saves the user's Usermin preferences for some module. The config parameter is
7659 an optional hash reference of names and values to save, which defaults to the
7660 global %userconfig hash. The modulename parameter is the module to update the
7661 config file, which defaults to the current module.
7664 sub save_user_module_config
7666 my $c = $_[0] || { &get_module_variable('%userconfig') };
7667 my $m = $_[1] || &get_module_name();
7668 my $ucd = $user_config_directory;
7670 my @uinfo = @remote_user_info ? @remote_user_info
7671 : getpwnam($remote_user);
7672 return if (!@uinfo || !$uinfo[7]);
7673 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7675 &write_file("$ucd/$m/config", $c);
7678 =head2 nice_size(bytes, [min])
7680 Converts a number of bytes into a number followed by a suffix like GB, MB
7681 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7682 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7687 my ($units, $uname);
7688 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7689 $units = 1024*1024*1024*1024;
7692 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7693 $units = 1024*1024*1024;
7696 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7700 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7708 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7710 return $sz." ".$uname;
7713 =head2 get_perl_path
7715 Returns the path to Perl currently in use, such as /usr/bin/perl.
7720 if (open(PERL, "$config_directory/perl-path")) {
7726 return $^X if (-x $^X);
7727 return &has_command("perl");
7730 =head2 get_goto_module([&mods])
7732 Returns the details of a module that the current user should be re-directed
7733 to after logging in, or undef if none. Useful for themes.
7738 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7739 if ($gconfig{'gotomodule'}) {
7740 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7741 return $goto if ($goto);
7743 if (@mods == 1 && $gconfig{'gotoone'}) {
7749 =head2 select_all_link(field, form, [text])
7751 Returns HTML for a 'Select all' link that uses Javascript to select
7752 multiple checkboxes with the same name. The parameters are :
7754 =item field - Name of the checkbox inputs.
7756 =item form - Index of the form on the page.
7758 =item text - Message for the link, defaulting to 'Select all'.
7763 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7764 my ($field, $form, $text) = @_;
7766 $text ||= $text{'ui_selall'};
7767 return "<a class='select_all' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = true; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = true; } } return false'>$text</a>";
7770 =head2 select_invert_link(field, form, text)
7772 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7773 selection on multiple checkboxes with the same name. The parameters are :
7775 =item field - Name of the checkbox inputs.
7777 =item form - Index of the form on the page.
7779 =item text - Message for the link, defaulting to 'Invert selection'.
7782 sub select_invert_link
7784 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7785 my ($field, $form, $text) = @_;
7787 $text ||= $text{'ui_selinv'};
7788 return "<a class='select_invert' href='#' onClick='var ff = document.forms[$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>";
7791 =head2 select_rows_link(field, form, text, &rows)
7793 Returns HTML for a link that uses Javascript to select rows with particular
7794 values for their checkboxes. The parameters are :
7796 =item field - Name of the checkbox inputs.
7798 =item form - Index of the form on the page.
7800 =item text - Message for the link, de
7802 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7805 sub select_rows_link
7807 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7808 my ($field, $form, $text, $rows) = @_;
7810 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7811 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7812 $js .= "return false;";
7813 return "<a href='#' onClick='$js'>$text</a>";
7816 =head2 check_pid_file(file)
7818 Given a pid file, returns the PID it contains if the process is running.
7823 open(PIDFILE, $_[0]) || return undef;
7824 my $pid = <PIDFILE>;
7826 $pid =~ /^\s*(\d+)/ || return undef;
7827 kill(0, $1) || return undef;
7833 Return the local os-specific library name to this module. For internal use only.
7838 my $mn = &get_module_name();
7839 my $md = &module_root_directory($mn);
7840 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7841 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7843 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7844 return "$mn-$gconfig{'os_type'}-lib.pl";
7846 elsif (-r "$md/$mn-generic-lib.pl") {
7847 return "$mn-generic-lib.pl";
7854 =head2 module_root_directory(module)
7856 Given a module name, returns its root directory. On a typical Webmin install,
7857 all modules are under the same directory - but it is theoretically possible to
7861 sub module_root_directory
7863 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7864 if (@root_directories > 1) {
7865 foreach my $r (@root_directories) {
7871 return "$root_directories[0]/$d";
7874 =head2 list_mime_types
7876 Returns a list of all known MIME types and their extensions, as a list of hash
7877 references with keys :
7879 =item type - The MIME type, like text/plain.
7881 =item exts - A list of extensions, like .doc and .avi.
7883 =item desc - A human-readable description for the MIME type.
7888 if (!@list_mime_types_cache) {
7890 open(MIME, "$root_directory/mime.types");
7894 if (s/#\s*(.*)$//g) {
7897 my ($type, @exts) = split(/\s+/);
7899 push(@list_mime_types_cache, { 'type' => $type,
7906 return @list_mime_types_cache;
7909 =head2 guess_mime_type(filename, [default])
7911 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7912 The optional default parameter sets a default type of use if none is found,
7913 which defaults to application/octet-stream.
7918 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7920 foreach my $t (&list_mime_types()) {
7921 foreach my $e (@{$t->{'exts'}}) {
7922 return $t->{'type'} if (lc($e) eq lc($ext));
7926 return @_ > 1 ? $_[1] : "application/octet-stream";
7929 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7931 Opens a file handle for writing to a temporary file, which will only be
7932 renamed over the real file when the handle is closed. This allows critical
7933 files like /etc/shadow to be updated safely, even if writing fails part way
7934 through due to lack of disk space. The parameters are :
7936 =item handle - File handle to open, as you would use in Perl's open function.
7938 =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.
7940 =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 $! with the error code.
7942 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7944 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7950 # Just getting a temp file
7951 if (!defined($main::open_tempfiles{$_[0]})) {
7952 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7953 my $dir = $1 || "/";
7954 my $tmp = "$dir/$2.webmintmp.$$";
7955 $main::open_tempfiles{$_[0]} = $tmp;
7956 push(@main::temporary_files, $tmp);
7958 return $main::open_tempfiles{$_[0]};
7962 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7963 $fh = &callers_package($fh);
7965 my %gaccess = &get_module_acl(undef, "");
7966 my $db = $gconfig{'debug_what_write'};
7967 if ($file =~ /\r|\n|\0/) {
7968 if ($noerror) { return 0; }
7969 else { &error("Filename contains invalid characters"); }
7971 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7972 # Read-only mode .. veto all writes
7973 print STDERR "vetoing write to $file\n";
7974 return open($fh, ">$null_file");
7976 elsif ($file =~ /^(>|>>|)nul$/i) {
7977 # Write to Windows null device
7978 &webmin_debug_log($1 eq ">" ? "WRITE" :
7979 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7981 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7982 # Writes to /dev/null or TTYs don't need to be handled
7983 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7984 return open($fh, $file);
7986 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7987 &webmin_debug_log("WRITE", $1) if ($db);
7988 # Over-writing a file, via a temp file
7990 $file = &translate_filename($file);
7992 # Open the link target instead
7993 $file = &resolve_links($file);
7996 # Cannot open a directory!
7997 if ($noerror) { return 0; }
7998 else { &error("Cannot write to directory $file"); }
8000 my $tmp = &open_tempfile($file);
8001 my $ex = open($fh, ">$tmp");
8002 if (!$ex && $! =~ /permission/i) {
8003 # Could not open temp file .. try opening actual file
8005 $ex = open($fh, ">$file");
8006 delete($main::open_tempfiles{$file});
8009 $main::open_temphandles{$fh} = $file;
8012 if (!$ex && !$noerror) {
8013 &error(&text("efileopen", $file, $!));
8017 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
8018 # Just writing direct to a file
8019 &webmin_debug_log("WRITE", $1) if ($db);
8021 $file = &translate_filename($file);
8022 my @old_attributes = &get_clear_file_attributes($file);
8023 my $ex = open($fh, ">$file");
8024 &reset_file_attributes($file, \@old_attributes);
8025 $main::open_temphandles{$fh} = $file;
8026 if (!$ex && !$noerror) {
8027 &error(&text("efileopen", $file, $!));
8032 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
8033 # Appending to a file .. nothing special to do
8034 &webmin_debug_log("APPEND", $1) if ($db);
8036 $file = &translate_filename($file);
8037 my @old_attributes = &get_clear_file_attributes($file);
8038 my $ex = open($fh, ">>$file");
8039 &reset_file_attributes($file, \@old_attributes);
8040 $main::open_temphandles{$fh} = $file;
8041 if (!$ex && !$noerror) {
8042 &error(&text("efileopen", $file, $!));
8047 elsif ($file =~ /^([a-zA-Z]:)?\//) {
8048 # Read mode .. nothing to do here
8049 &webmin_debug_log("READ", $file) if ($db);
8050 $file = &translate_filename($file);
8051 return open($fh, $file);
8053 elsif ($file eq ">" || $file eq ">>") {
8054 my ($package, $filename, $line) = caller;
8055 if ($noerror) { return 0; }
8056 else { &error("Missing file to open at ${package}::${filename} line $line"); }
8059 my ($package, $filename, $line) = caller;
8060 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
8065 =head2 close_tempfile(file|handle)
8067 Copies a temp file to the actual file, assuming that all writes were
8068 successful. The handle must have been one passed to open_tempfile.
8074 my $fh = &callers_package($_[0]);
8076 if (defined($file = $main::open_temphandles{$fh})) {
8078 close($fh) || &error(&text("efileclose", $file, $!));
8079 delete($main::open_temphandles{$fh});
8080 return &close_tempfile($file);
8082 elsif (defined($main::open_tempfiles{$_[0]})) {
8084 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
8085 my @st = stat($_[0]);
8086 if (&is_selinux_enabled() && &has_command("chcon")) {
8087 # Set original security context
8088 system("chcon --reference=".quotemeta($_[0]).
8089 " ".quotemeta($main::open_tempfiles{$_[0]}).
8090 " >/dev/null 2>&1");
8092 my @old_attributes = &get_clear_file_attributes($_[0]);
8093 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
8095 # Set original permissions and ownership
8096 chmod($st[2], $_[0]);
8097 chown($st[4], $st[5], $_[0]);
8099 &reset_file_attributes($_[0], \@old_attributes);
8100 delete($main::open_tempfiles{$_[0]});
8101 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
8102 if ($main::open_templocks{$_[0]}) {
8103 &unlock_file($_[0]);
8104 delete($main::open_templocks{$_[0]});
8109 # Must be closing a handle not associated with a file
8115 =head2 print_tempfile(handle, text, ...)
8117 Like the normal print function, but calls &error on failure. Useful when
8118 combined with open_tempfile, to ensure that a criticial file is never
8119 only partially written.
8124 my ($fh, @args) = @_;
8125 $fh = &callers_package($fh);
8126 (print $fh @args) || &error(&text("efilewrite",
8127 $main::open_temphandles{$fh} || $fh, $!));
8130 =head2 is_selinux_enabled
8132 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
8135 sub is_selinux_enabled
8137 if (!defined($main::selinux_enabled_cache)) {
8139 if ($gconfig{'os_type'} !~ /-linux$/) {
8140 # Not on linux, so no way
8141 $main::selinux_enabled_cache = 0;
8143 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
8144 # Use global config file
8145 $main::selinux_enabled_cache =
8146 $seconfig{'SELINUX'} eq 'disabled' ||
8147 !$seconfig{'SELINUX'} ? 0 : 1;
8150 # Use selinuxenabled command
8151 #$selinux_enabled_cache =
8152 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
8153 $main::selinux_enabled_cache = 0;
8156 return $main::selinux_enabled_cache;
8159 =head2 get_clear_file_attributes(file)
8161 Finds file attributes that may prevent writing, clears them and returns them
8162 as a list. May call error. Mainly for internal use by open_tempfile and
8166 sub get_clear_file_attributes
8170 if ($gconfig{'chattr'}) {
8171 # Get original immutable bit
8172 my $out = &backquote_command(
8173 "lsattr ".quotemeta($file)." 2>/dev/null");
8175 $out =~ s/\s\S+\n//;
8176 @old_attributes = grep { $_ ne '-' } split(//, $out);
8178 if (&indexof("i", @old_attributes) >= 0) {
8179 my $err = &backquote_logged(
8180 "chattr -i ".quotemeta($file)." 2>&1");
8182 &error("Failed to remove immutable bit on ".
8187 return @old_attributes;
8190 =head2 reset_file_attributes(file, &attributes)
8192 Put back cleared attributes on some file. May call error. Mainly for internal
8193 use by close_tempfile.
8196 sub reset_file_attributes
8198 my ($file, $old_attributes) = @_;
8199 if (&indexof("i", @$old_attributes) >= 0) {
8200 my $err = &backquote_logged(
8201 "chattr +i ".quotemeta($file)." 2>&1");
8203 &error("Failed to restore immutable bit on ".
8209 =head2 cleanup_tempnames
8211 Remove all temporary files generated using transname. Typically only called
8212 internally when a Webmin script exits.
8215 sub cleanup_tempnames
8217 foreach my $t (@main::temporary_files) {
8220 @main::temporary_files = ( );
8223 =head2 open_lock_tempfile([handle], file, [no-error])
8225 Returns a temporary file for writing to some actual file, and also locks it.
8226 Effectively the same as calling lock_file and open_tempfile on the same file,
8227 but calls the unlock for you automatically when it is closed.
8230 sub open_lock_tempfile
8232 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8233 $fh = &callers_package($fh);
8234 my $lockfile = $file;
8235 $lockfile =~ s/^[^\/]*//;
8236 if ($lockfile =~ /^\//) {
8237 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8239 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8244 $main::end_exit_status ||= $?;
8245 if ($$ == $main::initial_process_id) {
8246 # Exiting from initial process
8247 &cleanup_tempnames();
8248 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8249 $main::debug_log_start_module eq &get_module_name()) {
8250 my $len = time() - $main::debug_log_start_time;
8251 &webmin_debug_log("STOP", "runtime=$len");
8252 $main::debug_log_start_time = 0;
8254 if (!$ENV{'SCRIPT_NAME'} &&
8255 $main::initial_module_name eq &get_module_name()) {
8256 # In a command-line script - call the real exit, so that the
8257 # exit status gets properly propogated. In some cases this
8258 # was not happening.
8259 exit($main::end_exit_status);
8264 =head2 month_to_number(month)
8266 Converts a month name like feb to a number like 1.
8271 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8274 =head2 number_to_month(number)
8276 Converts a number like 1 to a month name like Feb.
8281 return ucfirst($number_to_month_map{$_[0]});
8284 =head2 get_rbac_module_acl(user, module)
8286 Returns a hash reference of RBAC overrides ACLs for some user and module.
8287 May return undef if none exist (indicating access denied), or the string *
8288 if full access is granted.
8291 sub get_rbac_module_acl
8293 my ($user, $mod) = @_;
8294 eval "use Authen::SolarisRBAC";
8295 return undef if ($@);
8298 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8299 # Automagic webmin.modulename.admin authorization exists .. allow access
8301 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8302 %rv = ( 'noconfig' => 1 );
8309 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8313 my ($auths, $acls) = split(/\s+/, $_);
8314 my @auths = split(/,/, $auths);
8316 my ($merge) = ($acls =~ s/^\+//);
8318 if ($auths eq "*") {
8319 # These ACLs apply to all RBAC users.
8320 # Only if there is some that match a specific authorization
8321 # later will they be used though.
8324 # Check each of the RBAC authorizations
8325 foreach my $a (@auths) {
8326 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8331 $foundany++ if ($gotall);
8334 # Found an RBAC authorization - return the ACLs
8335 return "*" if ($acls eq "*");
8336 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8338 # Just add to current set
8339 foreach my $a (keys %acl) {
8350 return !$foundany ? undef : %rv ? \%rv : undef;
8353 =head2 supports_rbac([module])
8355 Returns 1 if RBAC client support is available, such as on Solaris.
8360 return 0 if ($gconfig{'os_type'} ne 'solaris');
8361 eval "use Authen::SolarisRBAC";
8364 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8369 =head2 supports_ipv6()
8371 Returns 1 if outgoing IPv6 connections can be made
8376 return $ipv6_module_error ? 0 : 1;
8379 =head2 use_rbac_module_acl(user, module)
8381 Returns 1 if some user should use RBAC to get permissions for a module
8384 sub use_rbac_module_acl
8386 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8387 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8388 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8389 my %access = &get_module_acl($u, $m, 1);
8390 return $access{'rbac'} ? 1 : 0;
8393 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8395 Runs some command, possibly feeding it input and capturing output to the
8396 give files or scalar references. The parameters are :
8398 =item command - Full command to run, possibly including shell meta-characters.
8400 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8402 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8404 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8406 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8408 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8413 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8414 if (&is_readonly_mode() && !$safe) {
8415 print STDERR "Vetoing command $_[0]\n";
8419 $cmd = &translate_command($cmd);
8421 # Use ` operator where possible
8422 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8423 if (!$stdin && ref($stdout) && !$stderr) {
8424 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8425 $$stdout = `$cmd 2>$null_file`;
8428 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8429 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8430 $$stdout = `$cmd 2>&1`;
8433 elsif (!$stdin && !$stdout && !$stderr) {
8434 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8435 return system("$cmd >$null_file 2>$null_file <$null_file");
8439 $| = 1; # needed on some systems to flush before forking
8440 pipe(EXECSTDINr, EXECSTDINw);
8441 pipe(EXECSTDOUTr, EXECSTDOUTw);
8442 pipe(EXECSTDERRr, EXECSTDERRw);
8444 if (!($pid = fork())) {
8448 open(STDIN, "<&EXECSTDINr");
8449 open(STDOUT, ">&EXECSTDOUTw");
8450 if (ref($stderr) && $stderr eq $stdout) {
8451 open(STDERR, ">&EXECSTDOUTw");
8454 open(STDERR, ">&EXECSTDERRw");
8461 my $fullcmd = "($cmd)";
8462 if ($stdin && !ref($stdin)) {
8463 $fullcmd .= " <$stdin";
8465 if ($stdout && !ref($stdout)) {
8466 $fullcmd .= " >$stdout";
8468 if ($stderr && !ref($stderr)) {
8469 if ($stderr eq $stdout) {
8470 $fullcmd .= " 2>&1";
8473 $fullcmd .= " 2>$stderr";
8476 if ($gconfig{'os_type'} eq 'windows') {
8480 exec("/bin/sh", "-c", $fullcmd);
8482 print "Exec failed : $!\n";
8489 # Feed input and capture output
8491 if ($stdin && ref($stdin)) {
8492 print EXECSTDINw $$stdin;
8495 if ($stdout && ref($stdout)) {
8497 while(<EXECSTDOUTr>) {
8502 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8504 while(<EXECSTDERRr>) {
8515 =head2 open_readfile(handle, file)
8517 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8518 exactly the same as Perl's open function.
8523 my ($fh, $file) = @_;
8524 $fh = &callers_package($fh);
8525 my $realfile = &translate_filename($file);
8526 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8527 return open($fh, "<".$realfile);
8530 =head2 open_execute_command(handle, command, output?, safe?)
8532 Runs some command, with the specified file handle set to either write to it if
8533 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8534 indicates if the command modifies the state of the system or not.
8537 sub open_execute_command
8539 my ($fh, $cmd, $mode, $safe) = @_;
8540 $fh = &callers_package($fh);
8541 my $realcmd = &translate_command($cmd);
8542 if (&is_readonly_mode() && !$safe) {
8543 # Don't actually run it
8544 print STDERR "vetoing command $cmd\n";
8547 return open($fh, ">$null_file");
8550 return open($fh, $null_file);
8554 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8555 if ($gconfig{'debug_what_cmd'});
8557 return open($fh, "| $cmd");
8559 elsif ($mode == 1) {
8560 return open($fh, "$cmd 2>$null_file |");
8562 elsif ($mode == 2) {
8563 return open($fh, "$cmd 2>&1 |");
8567 =head2 translate_filename(filename)
8569 Applies all relevant registered translation functions to a filename. Mostly
8570 for internal use, and typically does nothing.
8573 sub translate_filename
8575 my ($realfile) = @_;
8576 my @funcs = grep { $_->[0] eq &get_module_name() ||
8577 !defined($_->[0]) } @main::filename_callbacks;
8578 foreach my $f (@funcs) {
8580 $realfile = &$func($realfile, @{$f->[2]});
8585 =head2 translate_command(filename)
8587 Applies all relevant registered translation functions to a command. Mostly
8588 for internal use, and typically does nothing.
8591 sub translate_command
8594 my @funcs = grep { $_->[0] eq &get_module_name() ||
8595 !defined($_->[0]) } @main::command_callbacks;
8596 foreach my $f (@funcs) {
8598 $realcmd = &$func($realcmd, @{$f->[2]});
8603 =head2 register_filename_callback(module|undef, &function, &args)
8605 Registers some function to be called when the specified module (or all
8606 modules) tries to open a file for reading and writing. The function must
8607 return the actual file to open. This allows you to override which files
8608 other code actually operates on, via the translate_filename function.
8611 sub register_filename_callback
8613 my ($mod, $func, $args) = @_;
8614 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8617 =head2 register_command_callback(module|undef, &function, &args)
8619 Registers some function to be called when the specified module (or all
8620 modules) tries to execute a command. The function must return the actual
8621 command to run. This allows you to override which commands other other code
8622 actually runs, via the translate_command function.
8625 sub register_command_callback
8627 my ($mod, $func, $args) = @_;
8628 push(@main::command_callbacks, [ $mod, $func, $args ]);
8631 =head2 capture_function_output(&function, arg, ...)
8633 Captures output that some function prints to STDOUT, and returns it. Useful
8634 for functions outside your control that print data when you really want to
8635 manipulate it before output.
8638 sub capture_function_output
8640 my ($func, @args) = @_;
8641 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8642 my $old = select(SOCKET1);
8643 my @rv = &$func(@args);
8652 return wantarray ? ($out, \@rv) : $out;
8655 =head2 capture_function_output_tempfile(&function, arg, ...)
8657 Behaves the same as capture_function_output, but uses a temporary file
8658 to avoid buffer full problems.
8661 sub capture_function_output_tempfile
8663 my ($func, @args) = @_;
8664 my $temp = &transname();
8665 open(BUFFER, ">$temp");
8666 my $old = select(BUFFER);
8667 my @rv = &$func(@args);
8670 my $out = &read_file_contents($temp);
8671 &unlink_file($temp);
8672 return wantarray ? ($out, \@rv) : $out;
8675 =head2 modules_chooser_button(field, multiple, [form])
8677 Returns HTML for a button for selecting one or many Webmin modules.
8678 field - Name of the HTML field to place the module names into.
8679 multiple - Set to 1 if multiple modules can be selected.
8680 form - Index of the form on the page.
8683 sub modules_chooser_button
8685 return &theme_modules_chooser_button(@_)
8686 if (defined(&theme_modules_chooser_button));
8687 my $form = defined($_[2]) ? $_[2] : 0;
8688 my $w = $_[1] ? 700 : 500;
8690 if ($_[1] && $gconfig{'db_sizemodules'}) {
8691 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8693 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8694 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8696 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";
8699 =head2 substitute_template(text, &hash)
8701 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8702 the text replaces it with the value of the hash key foo. Also supports blocks
8703 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8704 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8707 sub substitute_template
8709 # Add some extra fixed parameters to the hash
8710 my %hash = %{$_[1]};
8711 $hash{'hostname'} = &get_system_hostname();
8712 $hash{'webmin_config'} = $config_directory;
8713 $hash{'webmin_etc'} = $config_directory;
8714 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8715 $hash{'webmin_var'} = $var_directory;
8717 # Add time-based parameters, for use in DNS
8718 $hash{'current_time'} = time();
8719 my @tm = localtime($hash{'current_time'});
8720 $hash{'current_year'} = $tm[5]+1900;
8721 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8722 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8723 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8724 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8725 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8727 # Actually do the substition
8729 foreach my $s (keys %hash) {
8730 next if ($s eq ''); # Prevent just $ from being subbed
8733 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8734 $rv =~ s/\$\Q$us\E/$sv/g;
8736 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8737 # and ${IF}..${ENDIF} with value
8738 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8739 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8741 # Replace $IF..$ELSE..$ENDIF block with first value,
8742 # and $IF..$ENDIF with value
8743 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8744 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8746 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8747 # matching, nothing if not
8748 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8749 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8751 # Replace $IFEQ..$ENDIFEQ block with first value if
8752 # matching, nothing if not
8753 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8754 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8757 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8758 # and ${IF}..${ENDIF} with nothing
8759 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8760 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8762 # Replace $IF..$ELSE..$ENDIF block with second value,
8763 # and $IF..$ENDIF with nothing
8764 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8765 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8767 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8768 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8769 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8773 # Now assume any $IF blocks whose variables are not present in the hash
8774 # evaluate to false.
8775 # $IF...$ELSE x $ENDIF => x
8776 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8777 # $IF...x...$ENDIF => (nothing)
8778 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8779 # ${var} => (nothing)
8780 $rv =~ s/\$\{[A-Z]+\}//g;
8785 =head2 running_in_zone
8787 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8788 disable module and features that are not appropriate, like those that modify
8789 mounted filesystems.
8794 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8795 $gconfig{'os_version'} < 10);
8796 my $zn = `zonename 2>$null_file`;
8798 return $zn && $zn ne "global";
8801 =head2 running_in_vserver
8803 Returns 1 if the current Webmin instance is running in a Linux VServer.
8804 Used to disable modules and features that are not appropriate.
8807 sub running_in_vserver
8809 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8812 open(MTAB, "/etc/mtab");
8814 my ($dev, $mp) = split(/\s+/, $_);
8815 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8824 =head2 running_in_xen
8826 Returns 1 if Webmin is running inside a Xen instance, by looking
8827 at /proc/xen/capabilities.
8832 return 0 if (!-r "/proc/xen/capabilities");
8833 my $cap = &read_file_contents("/proc/xen/capabilities");
8834 return $cap =~ /control_d/ ? 0 : 1;
8837 =head2 running_in_openvz
8839 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8840 at /proc/vz/veinfo for a non-zero line.
8843 sub running_in_openvz
8845 return 0 if (!-r "/proc/vz/veinfo");
8846 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8847 return 0 if (!$lref || !@$lref);
8848 foreach my $l (@$lref) {
8850 my @ll = split(/\s+/, $l);
8851 return 0 if ($ll[0] eq '0');
8856 =head2 list_categories(&modules, [include-empty])
8858 Returns a hash mapping category codes to names, including any custom-defined
8859 categories. The modules parameter must be an array ref of module hash objects,
8860 as returned by get_all_module_infos.
8865 my ($mods, $empty) = @_;
8866 my (%cats, %catnames);
8867 &read_file("$config_directory/webmin.catnames", \%catnames);
8868 foreach my $o (@lang_order_list) {
8869 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8874 foreach my $m (@$mods) {
8875 my $c = $m->{'category'};
8876 next if ($cats{$c});
8877 if (defined($catnames{$c})) {
8878 $cats{$c} = $catnames{$c};
8880 elsif ($text{"category_$c"}) {
8881 $cats{$c} = $text{"category_$c"};
8884 # try to get category name from module ..
8885 my %mtext = &load_language($m->{'dir'});
8886 if ($mtext{"category_$c"}) {
8887 $cats{$c} = $mtext{"category_$c"};
8890 $c = $m->{'category'} = "";
8891 $cats{$c} = $text{"category_$c"};
8898 =head2 is_readonly_mode
8900 Returns 1 if the current user is in read-only mode, and thus all writes
8901 to files and command execution should fail.
8904 sub is_readonly_mode
8906 if (!defined($main::readonly_mode_cache)) {
8907 my %gaccess = &get_module_acl(undef, "");
8908 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8910 return $main::readonly_mode_cache;
8913 =head2 command_as_user(user, with-env?, command, ...)
8915 Returns a command to execute some command as the given user, using the
8916 su statement. If on Linux, the /bin/sh shell is forced in case the user
8917 does not have a valid shell. If with-env is set to 1, the -s flag is added
8918 to the su command to read the user's .profile or .bashrc file.
8923 my ($user, $env, @args) = @_;
8924 my @uinfo = getpwnam($user);
8925 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8926 # User shell doesn't appear to be valid
8927 if ($gconfig{'os_type'} =~ /-linux$/) {
8928 # Use -s /bin/sh to force it
8929 $shellarg = " -s /bin/sh";
8931 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8932 $gconfig{'os_type'} eq 'solaris' &&
8933 $gconfig{'os_version'} >= 11 ||
8934 $gconfig{'os_type'} eq 'macos') {
8935 # Use -m and force /bin/sh
8936 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8940 my $rv = "su".($env ? " -" : "").$shellarg.
8941 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8945 =head2 list_osdn_mirrors(project, file)
8947 This function is now deprecated in favor of letting sourceforge just
8948 redirect to the best mirror, and now just returns their primary download URL.
8951 sub list_osdn_mirrors
8953 my ($project, $file) = @_;
8954 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8956 'mirror' => 'downloads' } );
8959 =head2 convert_osdn_url(url)
8961 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8962 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8963 to a real URL on the sourceforge download redirector.
8966 sub convert_osdn_url
8969 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8970 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8971 # Always use the Sourceforge mail download URL, which does
8972 # a location-based redirect for us
8973 my ($project, $file) = ($1, $2);
8974 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8976 return wantarray ? ( $url, 0 ) : $url;
8979 # Some other source .. don't change
8980 return wantarray ? ( $url, 2 ) : $url;
8984 =head2 get_current_dir
8986 Returns the directory the current process is running in.
8992 if ($gconfig{'os_type'} eq 'windows') {
9005 =head2 supports_users
9007 Returns 1 if the current OS supports Unix user concepts and functions like
9008 su , getpw* and so on. This will be true on Linux and other Unixes, but false
9014 return $gconfig{'os_type'} ne 'windows';
9017 =head2 supports_symlinks
9019 Returns 1 if the current OS supports symbolic and hard links. This will not
9020 be the case on Windows.
9023 sub supports_symlinks
9025 return $gconfig{'os_type'} ne 'windows';
9028 =head2 quote_path(path)
9030 Returns a path with safe quoting for the current operating system.
9036 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
9037 # Windows only supports "" style quoting
9041 return quotemeta($path);
9045 =head2 get_windows_root
9047 Returns the base windows system directory, like c:/windows.
9050 sub get_windows_root
9052 if ($ENV{'SystemRoot'}) {
9053 my $rv = $ENV{'SystemRoot'};
9058 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
9062 =head2 read_file_contents(file)
9064 Given a filename, returns its complete contents as a string. Effectively
9065 the same as the Perl construct `cat file`.
9068 sub read_file_contents
9070 &open_readfile(FILE, $_[0]) || return undef;
9077 =head2 unix_crypt(password, salt)
9079 Performs Unix encryption on a password, using the built-in crypt function or
9080 the Crypt::UnixCrypt module if the former does not work. The salt parameter
9081 must be either an already-hashed password, or a two-character alpha-numeric
9087 my ($pass, $salt) = @_;
9088 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
9089 my $rv = eval "crypt(\$pass, \$salt)";
9091 return $rv if ($rv && !$@);
9092 eval "use Crypt::UnixCrypt";
9094 return Crypt::UnixCrypt::crypt($pass, $salt);
9097 &error("Failed to encrypt password : $err");
9101 =head2 split_quoted_string(string)
9103 Given a string like I<foo "bar baz" quux>, returns the array :
9107 sub split_quoted_string
9111 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
9112 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
9113 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
9120 =head2 write_to_http_cache(url, file|&data)
9122 Updates the Webmin cache with the contents of the given file, possibly also
9123 clearing out old data. Mainly for internal use by http_download.
9126 sub write_to_http_cache
9128 my ($url, $file) = @_;
9129 return 0 if (!$gconfig{'cache_size'});
9131 # Don't cache downloads that look dynamic
9132 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
9136 # Check if the current module should do caching
9137 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9138 # Caching all except some modules
9139 my @mods = split(/\s+/, $1);
9140 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9142 elsif ($gconfig{'cache_mods'}) {
9143 # Only caching some modules
9144 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9145 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9151 $size = length($$file);
9154 my @st = stat($file);
9158 if ($size > $gconfig{'cache_size'}) {
9159 # Bigger than the whole cache - so don't save it
9164 $cfile = "$main::http_cache_directory/$cfile";
9166 # See how much we have cached currently, clearing old files
9168 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
9169 opendir(CACHEDIR, $main::http_cache_directory);
9170 foreach my $f (readdir(CACHEDIR)) {
9171 next if ($f eq "." || $f eq "..");
9172 my $path = "$main::http_cache_directory/$f";
9173 my @st = stat($path);
9174 if ($gconfig{'cache_days'} &&
9175 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9176 # This file is too old .. trash it
9181 push(@cached, [ $path, $st[7], $st[9] ]);
9185 @cached = sort { $a->[2] <=> $b->[2] } @cached;
9186 while($total+$size > $gconfig{'cache_size'} && @cached) {
9187 # Cache is too big .. delete some files until the new one will fit
9188 unlink($cached[0]->[0]);
9189 $total -= $cached[0]->[1];
9193 # Finally, write out the new file
9195 &open_tempfile(CACHEFILE, ">$cfile");
9196 &print_tempfile(CACHEFILE, $$file);
9197 &close_tempfile(CACHEFILE);
9200 my ($ok, $err) = ©_source_dest($file, $cfile);
9206 =head2 check_in_http_cache(url)
9208 If some URL is in the cache and valid, return the filename for it. Mainly
9209 for internal use by http_download.
9212 sub check_in_http_cache
9215 return undef if (!$gconfig{'cache_size'});
9217 # Check if the current module should do caching
9218 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9219 # Caching all except some modules
9220 my @mods = split(/\s+/, $1);
9221 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9223 elsif ($gconfig{'cache_mods'}) {
9224 # Only caching some modules
9225 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9226 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9231 $cfile = "$main::http_cache_directory/$cfile";
9232 my @st = stat($cfile);
9233 return undef if (!@st || !$st[7]);
9234 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9239 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9244 =head2 supports_javascript
9246 Returns 1 if the current browser is assumed to support javascript.
9249 sub supports_javascript
9251 if (defined(&theme_supports_javascript)) {
9252 return &theme_supports_javascript();
9254 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9257 =head2 get_module_name
9259 Returns the name of the Webmin module that called this function. For internal
9260 use only by other API functions.
9265 return &get_module_variable('$module_name');
9268 =head2 get_module_variable(name, [ref])
9270 Returns the value of some variable which is set in the caller's context, if
9271 using the new WebminCore package. For internal use only.
9274 sub get_module_variable
9276 my ($v, $wantref) = @_;
9277 my $slash = $wantref ? "\\" : "";
9278 my $thispkg = &web_libs_package();
9279 if ($thispkg eq 'WebminCore') {
9280 my ($vt, $vn) = split('', $v, 2);
9282 for(my $i=0; ($callpkg) = caller($i); $i++) {
9283 last if ($callpkg ne $thispkg);
9285 return eval "${slash}${vt}${callpkg}::${vn}";
9287 return eval "${slash}${v}";
9290 =head2 clear_time_locale()
9292 Temporarily force the locale to C, until reset_time_locale is called. This is
9293 useful if your code is going to call C<strftime> from the POSIX package, and
9294 you want to ensure that the output is in a consistent format.
9297 sub clear_time_locale
9299 if ($main::clear_time_locale_count == 0) {
9302 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9303 POSIX::setlocale(POSIX::LC_TIME, "C");
9306 $main::clear_time_locale_count++;
9309 =head2 reset_time_locale()
9311 Revert the locale to whatever it was before clear_time_locale was called
9314 sub reset_time_locale
9316 if ($main::clear_time_locale_count == 1) {
9318 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9319 $main::clear_time_locale_old = undef;
9322 $main::clear_time_locale_count--;
9325 =head2 callers_package(filehandle)
9327 Convert a non-module filehandle like FOO to one qualified with the
9328 caller's caller's package, like fsdump::FOO. For internal use only.
9334 my $callpkg = (caller(1))[0];
9335 my $thispkg = &web_libs_package();
9336 if (!ref($fh) && $fh !~ /::/ &&
9337 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9338 $fh = $callpkg."::".$fh;
9343 =head2 web_libs_package()
9345 Returns the package this code is in. We can't always trust __PACKAGE__. For
9349 sub web_libs_package
9351 if ($called_from_webmin_core) {
9352 return "WebminCore";
9357 =head2 get_userdb_string
9359 Returns the URL-style string for connecting to the users and groups database
9362 sub get_userdb_string
9364 return undef if ($main::no_miniserv_userdb);
9366 &get_miniserv_config(\%miniserv);
9367 return $miniserv{'userdb'};
9370 =head2 connect_userdb(string)
9372 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9373 On failure returns an error message string. In an array context, returns the
9380 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9381 if ($proto eq "mysql") {
9382 # Connect to MySQL with DBI
9383 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9384 $drh || return $text{'sql_emysqldriver'};
9385 my ($host, $port) = split(/:/, $host);
9386 my $cstr = "database=$prefix;host=$host";
9387 $cstr .= ";port=$port" if ($port);
9388 my $dbh = $drh->connect($cstr, $user, $pass, { });
9389 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9390 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9392 elsif ($proto eq "postgresql") {
9393 # Connect to PostgreSQL with DBI
9394 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9395 $drh || return $text{'sql_epostgresqldriver'};
9396 my ($host, $port) = split(/:/, $host);
9397 my $cstr = "dbname=$prefix;host=$host";
9398 $cstr .= ";port=$port" if ($port);
9399 my $dbh = $drh->connect($cstr, $user, $pass);
9400 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9401 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9403 elsif ($proto eq "ldap") {
9404 # Connect with perl LDAP module
9405 eval "use Net::LDAP";
9406 $@ && return $text{'sql_eldapdriver'};
9407 my ($host, $port) = split(/:/, $host);
9408 my $scheme = $args->{'scheme'} || 'ldap';
9410 $port = $scheme eq 'ldaps' ? 636 : 389;
9412 my $ldap = Net::LDAP->new($host,
9414 'scheme' => $scheme);
9415 $ldap || return &text('sql_eldapconnect', $host);
9417 if ($args->{'tls'}) {
9418 # Switch to TLS mode
9419 eval { $mesg = $ldap->start_tls(); };
9420 if ($@ || !$mesg || $mesg->code) {
9421 return &text('sql_eldaptls',
9422 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9425 # Login to the server
9427 $mesg = $ldap->bind(dn => $user, password => $pass);
9430 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9432 if (!$mesg || $mesg->code) {
9433 return &text('sql_eldaplogin', $user,
9434 $mesg ? $mesg->error : "Unknown error");
9436 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9439 return "Unknown protocol $proto";
9443 =head2 disconnect_userdb(string, &handle)
9445 Closes a handle opened by connect_userdb
9448 sub disconnect_userdb
9451 if ($str =~ /^(mysql|postgresql):/) {
9453 if (!$h->{'AutoCommit'}) {
9458 elsif ($str =~ /^ldap:/) {
9465 =head2 split_userdb_string(string)
9467 Converts a string like mysql://user:pass@host/db into separate parts
9470 sub split_userdb_string
9473 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9474 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9475 ($1, $2, $3, $4, $5, $7);
9476 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9477 return ($proto, $user, $pass, $host, $prefix, \%args);
9482 $done_web_lib_funcs = 1;