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], [skip-file])
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 my $skipfile = $_[1];
3305 if (!$main::get_system_hostname[$m]) {
3306 if ($gconfig{'os_type'} ne 'windows') {
3307 # Try some common Linux hostname files first
3310 # Never get from file
3312 elsif ($gconfig{'os_type'} eq 'redhat-linux') {
3314 &read_env_file("/etc/sysconfig/network", \%nc);
3315 if ($nc{'HOSTNAME'}) {
3316 $fromfile = $nc{'HOSTNAME'};
3319 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3320 my $hn = &read_file_contents("/etc/hostname");
3326 elsif ($gconfig{'os_type'} eq 'open-linux') {
3327 my $hn = &read_file_contents("/etc/HOSTNAME");
3333 elsif ($gconfig{'os_type'} eq 'solaris') {
3334 my $hn = &read_file_contents("/etc/nodename");
3341 # If we found a hostname in a file, use it
3342 if ($fromfile && ($m || $fromfile =~ /\./)) {
3344 $fromfile =~ s/\..*$//;
3346 $main::get_system_hostname[$m] = $fromfile;
3350 # Can use hostname command on Unix
3351 &execute_command("hostname", undef,
3352 \$main::get_system_hostname[$m], undef, 0, 1);
3353 chop($main::get_system_hostname[$m]);
3355 eval "use Sys::Hostname";
3357 $main::get_system_hostname[$m] = eval "hostname()";
3359 if ($@ || !$main::get_system_hostname[$m]) {
3360 $main::get_system_hostname[$m] = "UNKNOWN";
3363 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3364 $gconfig{'os_type'} =~ /linux$/ &&
3365 !$gconfig{'no_hostname_f'} && !$_[0]) {
3366 # Try with -f flag to get fully qualified name
3368 my $ex = &execute_command("hostname -f", undef, \$flag,
3371 if ($ex || $flag eq "") {
3372 # -f not supported! We have probably set the
3373 # hostname to just '-f'. Fix the problem
3376 &execute_command("hostname ".
3377 quotemeta($main::get_system_hostname[$m]),
3378 undef, undef, undef, 0, 1);
3382 $main::get_system_hostname[$m] = $flag;
3387 # On Windows, try computername environment variable
3388 return $ENV{'computername'} if ($ENV{'computername'});
3389 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3391 # Fall back to net name command
3392 my $out = `net name 2>&1`;
3393 if ($out =~ /\-+\r?\n(\S+)/) {
3394 $main::get_system_hostname[$m] = $1;
3397 $main::get_system_hostname[$m] = "windows";
3401 return $main::get_system_hostname[$m];
3404 =head2 get_webmin_version
3406 Returns the version of Webmin currently being run, such as 1.450.
3409 sub get_webmin_version
3411 if (!$get_webmin_version) {
3412 open(VERSION, "$root_directory/version") || return 0;
3413 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3416 return $get_webmin_version;
3419 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3421 Returns a hash containing access control options for the given user and module.
3422 By default the current username and module name are used. If the no-rbac flag
3423 is given, the permissions will not be updated based on the user's RBAC role
3424 (as seen on Solaris). If the no-default flag is given, default permissions for
3425 the module will not be included.
3430 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3431 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3432 my $mdir = &module_root_directory($m);
3435 # Read default ACL first, to be overridden by per-user settings
3436 &read_file_cached("$mdir/defaultacl", \%rv);
3438 # If this isn't a master admin user, apply the negative permissions
3439 # so that he doesn't un-expectedly gain access to new features
3441 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3442 if ($gaccess{'negative'}) {
3443 &read_file_cached("$mdir/negativeacl", \%rv);
3447 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3448 # RBAC overrides exist for this user in this module
3449 my $rbac = &get_rbac_module_acl(
3450 defined($_[0]) ? $_[0] : $remote_user, $m);
3451 foreach my $r (keys %$rbac) {
3452 $rv{$r} = $rbac->{$r};
3455 elsif ($gconfig{"risk_$u"} && $m) {
3456 # ACL is defined by user's risk level
3457 my $rf = $gconfig{"risk_$u"}.'.risk';
3458 &read_file_cached("$mdir/$rf", \%rv);
3460 my $sf = $gconfig{"skill_$u"}.'.skill';
3461 &read_file_cached("$mdir/$sf", \%rv);
3464 # Use normal Webmin ACL, if a user is set
3465 my $userdb = &get_userdb_string();
3467 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3468 # Look for this user in the user/group DB, if one is defined
3469 # and if the user might be in the DB
3470 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3471 ref($dbh) || &error(&text('euserdbacl', $dbh));
3472 if ($proto eq "mysql" || $proto eq "postgresql") {
3473 # Find the user in the SQL DB
3474 my $cmd = $dbh->prepare(
3475 "select id from webmin_user where name = ?");
3476 $cmd && $cmd->execute($u) ||
3477 &error(&text('euserdbacl', $dbh->errstr));
3478 my ($id) = $cmd->fetchrow();
3479 $foundindb = 1 if (defined($id));
3482 # Fetch ACLs with SQL
3484 my $cmd = $dbh->prepare(
3485 "select attr,value from webmin_user_acl ".
3486 "where id = ? and module = ?");
3487 $cmd && $cmd->execute($id, $m) ||
3488 &error(&text('euserdbacl', $dbh->errstr));
3489 while(my ($a, $v) = $cmd->fetchrow()) {
3495 elsif ($proto eq "ldap") {
3497 my $rv = $dbh->search(
3499 filter => '(&(cn='.$u.')(objectClass='.
3500 $args->{'userclass'}.'))',
3502 if (!$rv || $rv->code) {
3503 &error(&text('euserdbacl',
3504 $rv ? $rv->error : "Unknown error"));
3506 my ($user) = $rv->all_entries;
3508 # Find ACL sub-object for the module
3509 my $ldapm = $m || "global";
3511 my $rv = $dbh->search(
3512 base => $user->dn(),
3513 filter => '(cn='.$ldapm.')',
3515 if (!$rv || $rv->code) {
3516 &error(&text('euserdbacl',
3517 $rv ? $rv->error : "Unknown error"));
3519 my ($acl) = $rv->all_entries;
3521 foreach my $av ($acl->get_value(
3522 'webminAclEntry')) {
3523 my ($a, $v) = split(/=/, $av,2);
3529 &disconnect_userdb($userdb, $dbh);
3533 # Read from local files
3534 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3535 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3537 "$config_directory/$m/$remote_user.acl",\%rv);
3541 if ($tconfig{'preload_functions'}) {
3542 &load_theme_library();
3544 if (defined(&theme_get_module_acl)) {
3545 %rv = &theme_get_module_acl($u, $m, \%rv);
3550 =head2 get_group_module_acl(group, [module], [no-default])
3552 Returns the ACL for a Webmin group, in an optional module (which defaults to
3553 the current module).
3556 sub get_group_module_acl
3559 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3560 my $mdir = &module_root_directory($m);
3563 &read_file_cached("$mdir/defaultacl", \%rv);
3566 my $userdb = &get_userdb_string();
3569 # Look for this group in the user/group DB
3570 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3571 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3572 if ($proto eq "mysql" || $proto eq "postgresql") {
3573 # Find the group in the SQL DB
3574 my $cmd = $dbh->prepare(
3575 "select id from webmin_group where name = ?");
3576 $cmd && $cmd->execute($g) ||
3577 &error(&text('egroupdbacl', $dbh->errstr));
3578 my ($id) = $cmd->fetchrow();
3579 $foundindb = 1 if (defined($id));
3582 # Fetch ACLs with SQL
3584 my $cmd = $dbh->prepare(
3585 "select attr,value from webmin_group_acl ".
3586 "where id = ? and module = ?");
3587 $cmd && $cmd->execute($id, $m) ||
3588 &error(&text('egroupdbacl', $dbh->errstr));
3589 while(my ($a, $v) = $cmd->fetchrow()) {
3595 elsif ($proto eq "ldap") {
3596 # Find group in LDAP
3597 my $rv = $dbh->search(
3599 filter => '(&(cn='.$g.')(objectClass='.
3600 $args->{'groupclass'}.'))',
3602 if (!$rv || $rv->code) {
3603 &error(&text('egroupdbacl',
3604 $rv ? $rv->error : "Unknown error"));
3606 my ($group) = $rv->all_entries;
3608 # Find ACL sub-object for the module
3609 my $ldapm = $m || "global";
3611 my $rv = $dbh->search(
3612 base => $group->dn(),
3613 filter => '(cn='.$ldapm.')',
3615 if (!$rv || $rv->code) {
3616 &error(&text('egroupdbacl',
3617 $rv ? $rv->error : "Unknown error"));
3619 my ($acl) = $rv->all_entries;
3621 foreach my $av ($acl->get_value(
3622 'webminAclEntry')) {
3623 my ($a, $v) = split(/=/, $av, 2);
3629 &disconnect_userdb($userdb, $dbh);
3632 # Read from local files
3633 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3635 if (defined(&theme_get_module_acl)) {
3636 %rv = &theme_get_module_acl($g, $m, \%rv);
3641 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3643 Updates the acl hash for some user and module. The parameters are :
3645 =item acl - Hash reference for the new access control options, or undef to clear
3647 =item user - User to update, defaulting to the current user.
3649 =item module - Module to update, defaulting to the caller.
3651 =item never-update-group - Never update the user's group's ACL
3656 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3657 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3658 if (!$_[3] && &foreign_check("acl")) {
3659 # Check if this user is a member of a group, and if he gets the
3660 # module from a group. If so, update its ACL as well
3661 &foreign_require("acl", "acl-lib.pl");
3663 foreach my $g (&acl::list_groups()) {
3664 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3665 &indexof($m, @{$g->{'modules'}}) >= 0) {
3671 &save_group_module_acl($_[0], $group->{'name'}, $m);
3675 my $userdb = &get_userdb_string();
3677 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3678 # Look for this user in the user/group DB
3679 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3680 ref($dbh) || &error(&text('euserdbacl', $dbh));
3681 if ($proto eq "mysql" || $proto eq "postgresql") {
3682 # Find the user in the SQL DB
3683 my $cmd = $dbh->prepare(
3684 "select id from webmin_user where name = ?");
3685 $cmd && $cmd->execute($u) ||
3686 &error(&text('euserdbacl2', $dbh->errstr));
3687 my ($id) = $cmd->fetchrow();
3688 $foundindb = 1 if (defined($id));
3691 # Replace ACLs for user
3693 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3694 "where id = ? and module = ?");
3695 $cmd && $cmd->execute($id, $m) ||
3696 &error(&text('euserdbacl', $dbh->errstr));
3699 my $cmd = $dbh->prepare(
3700 "insert into webmin_user_acl ".
3701 "(id,module,attr,value) values (?,?,?,?)");
3702 $cmd || &error(&text('euserdbacl2',
3704 foreach my $a (keys %{$_[0]}) {
3705 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3706 &error(&text('euserdbacl2',
3713 elsif ($proto eq "ldap") {
3714 # Find the user in LDAP
3715 my $rv = $dbh->search(
3717 filter => '(&(cn='.$u.')(objectClass='.
3718 $args->{'userclass'}.'))',
3720 if (!$rv || $rv->code) {
3721 &error(&text('euserdbacl',
3722 $rv ? $rv->error : "Unknown error"));
3724 my ($user) = $rv->all_entries;
3727 # Find the ACL sub-object for the module
3729 my $ldapm = $m || "global";
3730 my $rv = $dbh->search(
3731 base => $user->dn(),
3732 filter => '(cn='.$ldapm.')',
3734 if (!$rv || $rv->code) {
3735 &error(&text('euserdbacl',
3736 $rv ? $rv->error : "Unknown error"));
3738 my ($acl) = $rv->all_entries;
3741 foreach my $a (keys %{$_[0]}) {
3742 push(@al, $a."=".$_[0]->{$a});
3746 $rv = $dbh->modify($acl->dn(),
3747 replace => { "webminAclEntry", \@al });
3751 my @attrs = ( "cn", $ldapm,
3752 "objectClass", "webminAcl",
3753 "webminAclEntry", \@al );
3754 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3757 if (!$rv || $rv->code) {
3758 &error(&text('euserdbacl2',
3759 $rv ? $rv->error : "Unknown error"));
3763 &disconnect_userdb($userdb, $dbh);
3767 # Save ACL to local file
3768 if (!-d "$config_directory/$m") {
3769 mkdir("$config_directory/$m", 0755);
3772 &write_file("$config_directory/$m/$u.acl", $_[0]);
3775 &unlink_file("$config_directory/$m/$u.acl");
3780 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3782 Updates the acl hash for some group and module. The parameters are :
3784 =item acl - Hash reference for the new access control options.
3786 =item group - Group name to update.
3788 =item module - Module to update, defaulting to the caller.
3790 =item never-update-group - Never update the parent group's ACL
3793 sub save_group_module_acl
3796 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3797 if (!$_[3] && &foreign_check("acl")) {
3798 # Check if this group is a member of a group, and if it gets the
3799 # module from a group. If so, update the parent ACL as well
3800 &foreign_require("acl", "acl-lib.pl");
3802 foreach my $pg (&acl::list_groups()) {
3803 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3804 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3810 &save_group_module_acl($_[0], $group->{'name'}, $m);
3814 my $userdb = &get_userdb_string();
3817 # Look for this group in the user/group DB
3818 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3819 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3820 if ($proto eq "mysql" || $proto eq "postgresql") {
3821 # Find the group in the SQL DB
3822 my $cmd = $dbh->prepare(
3823 "select id from webmin_group where name = ?");
3824 $cmd && $cmd->execute($g) ||
3825 &error(&text('egroupdbacl2', $dbh->errstr));
3826 my ($id) = $cmd->fetchrow();
3827 $foundindb = 1 if (defined($id));
3830 # Replace ACLs for group
3832 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3833 "where id = ? and module = ?");
3834 $cmd && $cmd->execute($id, $m) ||
3835 &error(&text('egroupdbacl', $dbh->errstr));
3838 my $cmd = $dbh->prepare(
3839 "insert into webmin_group_acl ".
3840 "(id,module,attr,value) values (?,?,?,?)");
3841 $cmd || &error(&text('egroupdbacl2',
3843 foreach my $a (keys %{$_[0]}) {
3844 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3845 &error(&text('egroupdbacl2',
3852 elsif ($proto eq "ldap") {
3853 # Find the group in LDAP
3854 my $rv = $dbh->search(
3856 filter => '(&(cn='.$g.')(objectClass='.
3857 $args->{'groupclass'}.'))',
3859 if (!$rv || $rv->code) {
3860 &error(&text('egroupdbacl',
3861 $rv ? $rv->error : "Unknown error"));
3863 my ($group) = $rv->all_entries;
3865 my $ldapm = $m || "global";
3867 # Find the ACL sub-object for the module
3869 my $rv = $dbh->search(
3870 base => $group->dn(),
3871 filter => '(cn='.$ldapm.')',
3873 if (!$rv || $rv->code) {
3874 &error(&text('egroupdbacl',
3875 $rv ? $rv->error : "Unknown error"));
3877 my ($acl) = $rv->all_entries;
3880 foreach my $a (keys %{$_[0]}) {
3881 push(@al, $a."=".$_[0]->{$a});
3885 $rv = $dbh->modify($acl->dn(),
3886 replace => { "webminAclEntry", \@al });
3890 my @attrs = ( "cn", $ldapm,
3891 "objectClass", "webminAcl",
3892 "webminAclEntry", \@al );
3893 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
3896 if (!$rv || $rv->code) {
3897 &error(&text('egroupdbacl2',
3898 $rv ? $rv->error : "Unknown error"));
3902 &disconnect_userdb($userdb, $dbh);
3906 # Save ACL to local file
3907 if (!-d "$config_directory/$m") {
3908 mkdir("$config_directory/$m", 0755);
3911 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3914 &unlink_file("$config_directory/$m/$g.gacl");
3921 This function must be called by all Webmin CGI scripts, either directly or
3922 indirectly via a per-module lib.pl file. It performs a number of initialization
3923 and housekeeping tasks, such as working out the module name, checking that the
3924 current user has access to the module, and populating global variables. Some
3925 of the variables set include :
3927 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3929 =item $var_directory - Base logs directory, typically /var/webmin
3931 =item %config - Per-module configuration.
3933 =item %gconfig - Global configuration.
3935 =item $scriptname - Base name of the current perl script.
3937 =item $module_name - The name of the current module.
3939 =item $module_config_directory - The config directory for this module.
3941 =item $module_config_file - The config file for this module.
3943 =item $module_root_directory - This module's code directory.
3945 =item $webmin_logfile - The detailed logfile for webmin.
3947 =item $remote_user - The actual username used to login to webmin.
3949 =item $base_remote_user - The username whose permissions are in effect.
3951 =item $current_theme - The theme currently in use.
3953 =item $root_directory - The first root directory of this webmin install.
3955 =item @root_directories - All root directories for this webmin install.
3960 # Record first process ID that called this, so we know when it exited to clean
3962 $main::initial_process_id ||= $$;
3964 # Configuration and spool directories
3965 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3966 die "WEBMIN_CONFIG not set";
3968 $config_directory = $ENV{'WEBMIN_CONFIG'};
3969 if (!defined($ENV{'WEBMIN_VAR'})) {
3970 open(VARPATH, "$config_directory/var-path");
3971 chop($var_directory = <VARPATH>);
3975 $var_directory = $ENV{'WEBMIN_VAR'};
3977 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3978 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3980 if ($ENV{'SESSION_ID'}) {
3981 # Hide this variable from called programs, but keep it for internal use
3982 $main::session_id = $ENV{'SESSION_ID'};
3983 delete($ENV{'SESSION_ID'});
3985 if ($ENV{'REMOTE_PASS'}) {
3986 # Hide the password too
3987 $main::remote_pass = $ENV{'REMOTE_PASS'};
3988 delete($ENV{'REMOTE_PASS'});
3991 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3992 # Looks like we are running setuid, but the real UID hasn't been set.
3993 # Do so now, so that executed programs don't get confused
3998 # Read the webmin global config file. This contains the OS type and version,
3999 # OS specific configuration and global options such as proxy servers
4000 $config_file = "$config_directory/config";
4002 &read_file_cached($config_file, \%gconfig);
4003 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
4004 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
4006 # Work out of this is a web, command line or cron job
4007 if (!$main::webmin_script_type) {
4008 if ($ENV{'SCRIPT_NAME'}) {
4010 $main::webmin_script_type = 'web';
4013 # Cron jobs have no TTY
4014 if ($gconfig{'os_type'} eq 'windows' ||
4015 open(DEVTTY, ">/dev/tty")) {
4016 $main::webmin_script_type = 'cmd';
4020 $main::webmin_script_type = 'cron';
4025 # If debugging is enabled, open the debug log
4026 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
4027 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
4028 if ($gconfig{'debug_size'}) {
4029 my @st = stat($dlog);
4030 if ($st[7] > $gconfig{'debug_size'}) {
4031 rename($dlog, $dlog.".0");
4034 open(main::DEBUGLOG, ">>$dlog");
4035 $main::opened_debug_log = 1;
4037 if ($gconfig{'debug_what_start'}) {
4038 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4039 $main::debug_log_start_time = time();
4040 &webmin_debug_log("START", "script=$script_name");
4041 $main::debug_log_start_module = $module_name;
4045 # Set PATH and LD_LIBRARY_PATH
4046 if ($gconfig{'path'}) {
4047 if ($gconfig{'syspath'}) {
4049 $ENV{'PATH'} = $gconfig{'path'};
4053 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
4056 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
4058 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
4059 if ($gconfig{'http_proxy'}) {
4060 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
4062 if ($gconfig{'ftp_proxy'}) {
4063 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
4065 if ($gconfig{'noproxy'}) {
4066 $ENV{'no_proxy'} = $gconfig{'noproxy'};
4069 # Find all root directories
4071 if (&get_miniserv_config(\%miniserv)) {
4072 @root_directories = ( $miniserv{'root'} );
4073 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
4074 push(@root_directories, $miniserv{"extraroot_$i"});
4078 # Work out which module we are in, and read the per-module config file
4079 $0 =~ s/\\/\//g; # Force consistent path on Windows
4080 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
4081 # In a foreign call - use the module name given
4082 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
4083 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
4084 @root_directories = ( $root_directory ) if (!@root_directories);
4086 elsif ($ENV{'SCRIPT_NAME'}) {
4087 my $sn = $ENV{'SCRIPT_NAME'};
4088 $sn =~ s/^$gconfig{'webprefix'}//
4089 if (!$gconfig{'webprefixnoredir'});
4090 if ($sn =~ /^\/([^\/]+)\//) {
4091 # Get module name from CGI path
4094 if ($ENV{'SERVER_ROOT'}) {
4095 $root_directory = $ENV{'SERVER_ROOT'};
4097 elsif ($ENV{'SCRIPT_FILENAME'}) {
4098 $root_directory = $ENV{'SCRIPT_FILENAME'};
4099 $root_directory =~ s/$sn$//;
4101 @root_directories = ( $root_directory ) if (!@root_directories);
4104 # Get root directory from miniserv.conf, and deduce module name from $0
4105 $root_directory = $root_directories[0];
4107 foreach my $r (@root_directories) {
4108 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
4109 # Under a module directory
4114 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
4120 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
4123 # Set the umask based on config
4124 if ($gconfig{'umask'} && !$main::umask_already++) {
4125 umask(oct($gconfig{'umask'}));
4128 # If this is a cron job or other background task, set the nice level
4129 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4131 if ($gconfig{'nice'}) {
4132 eval 'POSIX::nice($gconfig{\'nice\'});';
4135 # Set IO scheduling class and priority
4136 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4138 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4139 if ($gconfig{'sclass'} ne '');
4140 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4141 if ($gconfig{'sprio'} ne '');
4143 &execute_command("$cmd >/dev/null 2>&1");
4146 $main::nice_already++;
4149 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4150 $base_remote_user = $u;
4151 $remote_user = $ENV{'REMOTE_USER'};
4153 # Work out if user is definitely in the DB, and if so get his attrs
4154 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4155 %remote_user_attrs = ( );
4156 if ($remote_user_proto) {
4157 my $userdb = &get_userdb_string();
4158 my ($dbh, $proto, $prefix, $args) =
4159 $userdb ? &connect_userdb($userdb) : ( );
4161 if ($proto eq "mysql" || $proto eq "postgresql") {
4162 # Read attrs from SQL
4163 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
4164 if ($cmd && $cmd->execute($base_remote_user)) {
4165 while(my ($attr, $value) = $cmd->fetchrow()) {
4166 $remote_user_attrs{$attr} = $value;
4171 elsif ($proto eq "ldap") {
4172 # Read attrs from LDAP
4173 my $rv = $dbh->search(
4175 filter => '(&(cn='.$base_remote_user.')'.
4177 $args->{'userclass'}.'))',
4179 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4181 foreach $la ($u->get_value('webminAttr')) {
4182 my ($attr, $value) = split(/=/, $la, 2);
4183 $remote_user_attrs{$attr} = $value;
4187 &disconnect_userdb($userdb, $dbh);
4192 # Find and load the configuration file for this module
4193 my (@ruinfo, $rgroup);
4194 $module_config_directory = "$config_directory/$module_name";
4195 if (&get_product_name() eq "usermin" &&
4196 -r "$module_config_directory/config.$remote_user") {
4198 $module_config_file = "$module_config_directory/config.$remote_user";
4200 elsif (&get_product_name() eq "usermin" &&
4201 (@ruinfo = getpwnam($remote_user)) &&
4202 ($rgroup = getgrgid($ruinfo[3])) &&
4203 -r "$module_config_directory/config.\@$rgroup") {
4204 # Based on group name
4205 $module_config_file = "$module_config_directory/config.\@$rgroup";
4209 $module_config_file = "$module_config_directory/config";
4212 &read_file_cached($module_config_file, \%config);
4214 # Fix up windows-specific substitutions in values
4215 foreach my $k (keys %config) {
4216 if ($config{$k} =~ /\$\{systemroot\}/) {
4217 my $root = &get_windows_root();
4218 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4223 # Record the initial module
4224 $main::initial_module_name ||= $module_name;
4226 # Set some useful variables
4228 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4229 $gconfig{'mobile_theme'} :
4230 defined($remote_user_attrs{'theme'}) ?
4231 $remote_user_attrs{'theme'} :
4232 defined($gconfig{'theme_'.$remote_user}) ?
4233 $gconfig{'theme_'.$remote_user} :
4234 defined($gconfig{'theme_'.$base_remote_user}) ?
4235 $gconfig{'theme_'.$base_remote_user} :
4237 @current_themes = split(/\s+/, $current_themes);
4238 $current_theme = $current_themes[0];
4239 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4240 $theme_root_directory = $theme_root_directories[0];
4241 @theme_configs = ( );
4242 foreach my $troot (@theme_root_directories) {
4244 &read_file_cached("$troot/config", \%onetconfig);
4245 &read_file_cached("$troot/config", \%tconfig);
4246 push(@theme_configs, \%onetconfig);
4248 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4249 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4251 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4252 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4254 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4255 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4256 if ($tconfig{'preload_functions'}) {
4257 # Force load of theme functions right now, if requested
4258 &load_theme_library();
4260 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4261 # Load the theme's Webmin:: package classes
4262 do "$theme_root_directory/$tconfig{'oofunctions'}";
4267 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4268 : "$var_directory/webmin.log";
4270 # Load language strings into %text
4271 my @langs = &list_languages();
4273 if ($gconfig{'acceptlang'}) {
4274 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4275 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4277 $accepted_lang = $al->{'lang'};
4282 $current_lang = $force_lang ? $force_lang :
4283 $accepted_lang ? $accepted_lang :
4284 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4285 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4286 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4287 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4288 foreach my $l (@langs) {
4289 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4291 @lang_order_list = &unique($default_lang,
4292 split(/:/, $current_lang_info->{'fallback'}),
4294 %text = &load_language($module_name);
4295 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4297 # Get the %module_info for this module
4299 my ($mi) = grep { $_->{'dir'} eq $module_name }
4300 &get_all_module_infos(2);
4301 %module_info = %$mi;
4302 $module_root_directory = &module_root_directory($module_name);
4305 if ($module_name && !$main::no_acl_check &&
4306 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4307 # Check if the HTTP user can access this module
4308 if (!&foreign_available($module_name)) {
4309 if (!&foreign_check($module_name)) {
4310 &error(&text('emodulecheck',
4311 "<i>$module_info{'desc'}</i>"));
4314 &error(&text('emodule', "<i>$u</i>",
4315 "<i>$module_info{'desc'}</i>"));
4318 $main::no_acl_check++;
4321 # Check the Referer: header for nasty redirects
4322 my @referers = split(/\s+/, $gconfig{'referers'});
4324 my $r = $ENV{'HTTP_REFERER'};
4325 if ($r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?\[([^\]]+)\]/ ||
4326 $r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4329 my $http_host = $ENV{'HTTP_HOST'};
4330 $http_host =~ s/:\d+$//;
4331 $http_host =~ s/^\[(\S+)\]$/$1/;
4332 my $unsafe_index = $unsafe_index_cgi ||
4333 &get_module_variable('$unsafe_index_cgi');
4335 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4336 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4338 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4339 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4340 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4341 ($referer_site && $referer_site ne $http_host &&
4342 &indexof($referer_site, @referers) < 0 ||
4343 !$referer_site && $gconfig{'referers_none'}) &&
4344 !$trust_unknown_referers &&
4345 !&get_module_variable('$trust_unknown_referers')) {
4346 # Looks like a link from elsewhere .. show an error
4347 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4349 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4350 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4351 if ($referer_site) {
4353 print &text('referer_warn',
4354 "<tt>".&html_escape($r)."</tt>", $url);
4356 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4357 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4360 # No referer info given
4361 print &text('referer_warn_unknown', $url),"<p>\n";
4362 print &text('referer_fix1u'),"<p>\n";
4363 print &text('referer_fix2u'),"<p>\n";
4367 &footer("/", $text{'index'});
4370 $main::no_referers_check++;
4371 $main::completed_referers_check++;
4373 # Call theme post-init
4374 if (defined(&theme_post_init_config)) {
4375 &theme_post_init_config(@_);
4378 # Record that we have done the calling library in this package
4379 my ($callpkg, $lib) = caller();
4381 $main::done_foreign_require{$callpkg,$lib} = 1;
4383 # If a licence checking is enabled, do it now
4384 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4385 &foreign_check($gconfig{'licence_module'}) &&
4386 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4387 my $oldpwd = &get_current_dir();
4388 $main::done_licence_module_check++;
4389 $main::licence_module = $gconfig{'licence_module'};
4390 &foreign_require($main::licence_module, "licence_check.pl");
4391 ($main::licence_status, $main::licence_message) =
4392 &foreign_call($main::licence_module, "check_licence");
4396 # Export global variables to caller
4397 if ($main::export_to_caller) {
4398 foreach my $v ('$config_file', '%gconfig', '$null_file',
4399 '$path_separator', '@root_directories',
4400 '$root_directory', '$module_name',
4401 '$base_remote_user', '$remote_user',
4402 '$remote_user_proto', '%remote_user_attrs',
4403 '$module_config_directory', '$module_config_file',
4404 '%config', '@current_themes', '$current_theme',
4405 '@theme_root_directories', '$theme_root_directory',
4406 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4407 '$webmin_logfile', '$current_lang',
4408 '$current_lang_info', '@lang_order_list', '%text',
4409 '%module_info', '$module_root_directory') {
4410 my ($vt, $vn) = split('', $v, 2);
4411 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4418 =head2 load_language([module], [directory])
4420 Returns a hashtable mapping text codes to strings in the appropriate language,
4421 based on the $current_lang global variable, which is in turn set based on
4422 the Webmin user's selection. The optional module parameter tells the function
4423 which module to load strings for, and defaults to the calling module. The
4424 optional directory parameter can be used to load strings from a directory
4427 In regular module development you will never need to call this function
4428 directly, as init_config calls it for you, and places the module's strings
4429 into the %text hash.
4435 my $root = $root_directory;
4436 my $ol = $gconfig{'overlang'};
4437 my ($dir) = ($_[1] || "lang");
4439 # Read global lang files
4440 foreach my $o (@lang_order_list) {
4441 my $ok = &read_file_cached_with_stat("$root/$dir/$o", \%text);
4442 return () if (!$ok && $o eq $default_lang);
4445 foreach my $o (@lang_order_list) {
4446 &read_file_cached("$root/$ol/$o", \%text);
4449 &read_file_cached("$config_directory/custom-lang", \%text);
4450 foreach my $o (@lang_order_list) {
4451 next if ($o eq "en");
4452 &read_file_cached("$config_directory/custom-lang.$o", \%text);
4454 my $norefs = $text{'__norefs'};
4457 # Read module's lang files
4458 delete($text{'__norefs'});
4459 my $mdir = &module_root_directory($_[0]);
4460 foreach my $o (@lang_order_list) {
4461 &read_file_cached_with_stat("$mdir/$dir/$o", \%text);
4464 foreach my $o (@lang_order_list) {
4465 &read_file_cached("$mdir/$ol/$o", \%text);
4468 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4469 foreach my $o (@lang_order_list) {
4470 next if ($o eq "en");
4471 &read_file_cached("$config_directory/$_[0]/custom-lang.$o",
4474 $norefs = $text{'__norefs'} if ($norefs);
4477 # Replace references to other strings
4479 foreach $k (keys %text) {
4480 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4484 if (defined(&theme_load_language)) {
4485 &theme_load_language(\%text, $_[0]);
4490 =head2 text_subs(string)
4492 Used internally by load_language to expand $code substitutions in language
4498 if (substr($_[0], 0, 8) eq "include:") {
4501 open(INCLUDE, substr($_[0], 8));
4509 my $t = $_[1]->{$_[0]};
4510 return defined($t) ? $t : '$'.$_[0];
4514 =head2 text(message, [substitute]+)
4516 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4517 the substitute parameters. This makes it easy to use strings with placeholders
4518 that get replaced with programmatically generated text. For example :
4520 print &text('index_hello', $remote_user),"<p>\n";
4525 my $t = &get_module_variable('%text', 1);
4526 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4527 for(my $i=1; $i<@_; $i++) {
4528 $rv =~ s/\$$i/$_[$i]/g;
4533 =head2 encode_base64(string)
4535 Encodes a string into base64 format, for use in MIME email or HTTP
4536 authorization headers.
4542 pos($_[0]) = 0; # ensure start at the beginning
4543 while ($_[0] =~ /(.{1,57})/gs) {
4544 $res .= substr(pack('u57', $1), 1)."\n";
4547 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4548 my $padding = (3 - length($_[0]) % 3) % 3;
4549 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4553 =head2 decode_base64(string)
4555 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4562 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4563 if (length($str) % 4) {
4566 $str =~ s/=+$//; # remove padding
4567 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4568 while ($str =~ /(.{1,60})/gs) {
4569 my $len = chr(32 + length($1)*3/4); # compute length byte
4570 $res .= unpack("u", $len . $1 ); # uudecode
4575 =head2 get_module_info(module, [noclone], [forcache])
4577 Returns a hash containg details of the given module. Some useful keys are :
4579 =item dir - The module directory, like sendmail.
4581 =item desc - Human-readable description, in the current users' language.
4583 =item version - Optional module version number.
4585 =item os_support - List of supported operating systems and versions.
4587 =item category - Category on Webmin's left menu, like net.
4592 return () if ($_[0] =~ /^\./);
4593 my (%rv, $clone, $o);
4594 my $mdir = &module_root_directory($_[0]);
4595 &read_file_cached("$mdir/module.info", \%rv) || return ();
4597 # A clone is a module that links to another directory under the root
4598 foreach my $r (@root_directories) {
4599 if (&is_under_directory($r, $mdir)) {
4605 foreach $o (@lang_order_list) {
4606 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4607 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4609 if ($clone && !$_[1] && $config_directory) {
4610 $rv{'clone'} = $rv{'desc'};
4611 &read_file("$config_directory/$_[0]/clone", \%rv);
4614 my %module_categories;
4615 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4616 my $pn = &get_product_name();
4617 if (defined($rv{'category_'.$pn})) {
4618 # Can override category for webmin/usermin
4619 $rv{'category'} = $rv{'category_'.$pn};
4621 $rv{'realcategory'} = $rv{'category'};
4622 $rv{'category'} = $module_categories{$_[0]}
4623 if (defined($module_categories{$_[0]}));
4625 # Apply description overrides
4626 $rv{'realdesc'} = $rv{'desc'};
4628 &read_file_cached("$config_directory/webmin.descs", \%descs);
4629 if ($descs{$_[0]}) {
4630 $rv{'desc'} = $descs{$_[0]};
4632 foreach my $o (@lang_order_list) {
4633 my $ov = $descs{$_[0]." ".$o} || $descs{$_[0]."_".$o};
4634 $rv{'desc'} = $ov if ($ov);
4638 # Apply per-user description overridde
4639 my %gaccess = &get_module_acl(undef, "");
4640 if ($gaccess{'desc_'.$_[0]}) {
4641 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4645 if ($rv{'longdesc'}) {
4646 # All standard modules have an index.cgi
4647 $rv{'index_link'} = 'index.cgi';
4650 # Call theme-specific override function
4651 if (defined(&theme_get_module_info)) {
4652 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4658 =head2 get_all_module_infos(cachemode)
4660 Returns a list contains the information on all modules in this webmin
4661 install, including clones. Uses caching to reduce the number of module.info
4662 files that need to be read. Each element of the array is a hash reference
4663 in the same format as returned by get_module_info. The cache mode flag can be :
4664 0 = read and write, 1 = don't read or write, 2 = read only
4667 sub get_all_module_infos
4671 # Is the cache out of date? (ie. have any of the root's changed?)
4672 my $cache_file = "$config_directory/module.infos.cache";
4674 if (&read_file_cached($cache_file, \%cache)) {
4675 foreach my $r (@root_directories) {
4677 if ($st[9] != $cache{'mtime_'.$r}) {
4687 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4688 # Can use existing module.info cache
4690 foreach my $k (keys %cache) {
4691 if ($k =~ /^(\S+) (\S+)$/) {
4692 $mods{$1}->{$2} = $cache{$k};
4695 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4698 # Need to rebuild cache
4700 foreach my $r (@root_directories) {
4702 foreach my $m (readdir(DIR)) {
4703 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4704 my %minfo = &get_module_info($m, 0, 1);
4705 next if (!%minfo || !$minfo{'dir'});
4707 foreach $k (keys %minfo) {
4708 $cache{"${m} ${k}"} = $minfo{$k};
4713 $cache{'mtime_'.$r} = $st[9];
4715 $cache{'lang'} = $current_lang;
4716 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4719 # Override descriptions for modules for current user
4720 my %gaccess = &get_module_acl(undef, "");
4721 foreach my $m (@rv) {
4722 if ($gaccess{"desc_".$m->{'dir'}}) {
4723 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4727 # Apply installed flags
4729 &read_file_cached("$config_directory/installed.cache", \%installed);
4730 foreach my $m (@rv) {
4731 $m->{'installed'} = $installed{$m->{'dir'}};
4737 =head2 get_theme_info(theme)
4739 Returns a hash containing a theme's details, taken from it's theme.info file.
4740 Some useful keys are :
4742 =item dir - The theme directory, like blue-theme.
4744 =item desc - Human-readable description, in the current users' language.
4746 =item version - Optional module version number.
4748 =item os_support - List of supported operating systems and versions.
4753 return () if ($_[0] =~ /^\./);
4755 my $tdir = &module_root_directory($_[0]);
4756 &read_file("$tdir/theme.info", \%rv) || return ();
4757 foreach my $o (@lang_order_list) {
4758 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4764 =head2 list_languages
4766 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4767 Each is a hash reference with the following keys :
4769 =item lang - The short language code, like es for Spanish.
4771 =item desc - A human-readable description, in English.
4773 =item charset - An optional character set to use when displaying the language.
4775 =item titles - Set to 1 only if Webmin has title images for the language.
4777 =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.
4782 if (!@main::list_languages_cache) {
4785 open(LANG, "$root_directory/lang_list.txt");
4787 if (/^(\S+)\s+(.*)/) {
4788 my $l = { 'desc' => $2 };
4789 foreach $o (split(/,/, $1)) {
4790 if ($o =~ /^([^=]+)=(.*)$/) {
4794 $l->{'index'} = scalar(@rv);
4795 push(@main::list_languages_cache, $l);
4799 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4800 @main::list_languages_cache;
4802 return @main::list_languages_cache;
4805 =head2 read_env_file(file, &hash, [include-commented])
4807 Similar to Webmin's read_file function, but handles files containing shell
4808 environment variables formatted like :
4813 The file parameter is the full path to the file to read, and hash a Perl hash
4814 ref to read names and values into.
4820 &open_readfile(FILE, $_[0]) || return 0;
4823 # Remove start of line comments
4827 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4828 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4829 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4837 =head2 write_env_file(file, &hash, [export])
4839 Writes out a hash to a file in name='value' format, suitable for use in a shell
4840 script. The parameters are :
4842 =item file - Full path for a file to write to
4844 =item hash - Hash reference of names and values to write.
4846 =item export - If set to 1, preceed each variable setting with the word 'export'.
4851 my $exp = $_[2] ? "export " : "";
4852 &open_tempfile(FILE, ">$_[0]");
4853 foreach my $k (keys %{$_[1]}) {
4854 my $v = $_[1]->{$k};
4855 if ($v =~ /^\S+$/) {
4856 &print_tempfile(FILE, "$exp$k=$v\n");
4859 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4862 &close_tempfile(FILE);
4865 =head2 lock_file(filename, [readonly], [forcefile])
4867 Lock a file for exclusive access. If the file is already locked, spin
4868 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4869 to work OK. The parameters are :
4871 =item filename - File or directory to lock.
4873 =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.
4875 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4880 my $realfile = &translate_filename($_[0]);
4881 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4882 my $no_lock = !&can_lock_file($realfile);
4883 my $lock_tries_count = 0;
4886 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4891 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4894 # Create the .lock file
4895 open(LOCKING, ">$realfile.lock") || return 0;
4896 my $lck = eval "flock(LOCKING, 2+4)";
4898 # Lock of lock file failed! Wait till later
4901 print LOCKING $$,"\n";
4902 eval "flock(LOCKING, 8)";
4905 $main::locked_file_list{$realfile} = int($_[1]);
4906 push(@main::temporary_files, "$realfile.lock");
4907 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4908 !&get_module_variable('$no_log_file_changes') &&
4910 # Grab a copy of this file for later diffing
4912 $main::locked_file_data{$realfile} = undef;
4914 $main::locked_file_type{$realfile} = 1;
4915 $main::locked_file_data{$realfile} = '';
4917 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4918 $main::locked_file_type{$realfile} = 2;
4919 $main::locked_file_data{$realfile} = $lnk;
4921 elsif (open(ORIGFILE, $realfile)) {
4922 $main::locked_file_type{$realfile} = 0;
4923 $main::locked_file_data{$realfile} = '';
4926 $main::locked_file_data{$realfile} .=$_;
4935 if ($lock_tries_count++ > 5*60) {
4936 # Give up after 5 minutes
4937 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4943 =head2 unlock_file(filename)
4945 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4946 file changes is enabled, then at unlock file a diff will be taken between the
4947 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4948 called. This can then be viewed in the Webmin Actions Log module.
4953 my $realfile = &translate_filename($_[0]);
4954 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4955 unlink("$realfile.lock") if (&can_lock_file($realfile));
4956 delete($main::locked_file_list{$realfile});
4957 if (exists($main::locked_file_data{$realfile})) {
4958 # Diff the new file with the old
4960 my $lnk = readlink($realfile);
4961 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4962 my $oldtype = $main::locked_file_type{$realfile};
4963 my $new = !defined($main::locked_file_data{$realfile});
4964 if ($new && !-e _) {
4965 # file doesn't exist, and never did! do nothing ..
4967 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4968 # is (or was) a directory ..
4969 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4970 push(@main::locked_file_diff,
4971 { 'type' => 'mkdir', 'object' => $realfile });
4973 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4974 push(@main::locked_file_diff,
4975 { 'type' => 'rmdir', 'object' => $realfile });
4978 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4979 # is (or was) a symlink ..
4980 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4981 push(@main::locked_file_diff,
4982 { 'type' => 'symlink', 'object' => $realfile,
4985 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4986 push(@main::locked_file_diff,
4987 { 'type' => 'unsymlink', 'object' => $realfile,
4988 'data' => $main::locked_file_data{$realfile} });
4990 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4991 push(@main::locked_file_diff,
4992 { 'type' => 'resymlink', 'object' => $realfile,
4997 # is a file, or has changed type?!
4998 my ($diff, $delete_file);
4999 my $type = "modify";
5001 open(NEWFILE, ">$realfile");
5006 if (!defined($main::locked_file_data{$realfile})) {
5009 open(ORIGFILE, ">$realfile.webminorig");
5010 print ORIGFILE $main::locked_file_data{$realfile};
5012 $diff = &backquote_command(
5013 "diff ".quotemeta("$realfile.webminorig")." ".
5014 quotemeta($realfile)." 2>/dev/null");
5015 push(@main::locked_file_diff,
5016 { 'type' => $type, 'object' => $realfile,
5017 'data' => $diff } ) if ($diff);
5018 unlink("$realfile.webminorig");
5019 unlink($realfile) if ($delete_file);
5022 if ($gconfig{'logfullfiles'}) {
5023 # Add file details to list of those to fully log
5024 $main::orig_file_data{$realfile} ||=
5025 $main::locked_file_data{$realfile};
5026 $main::orig_file_type{$realfile} ||=
5027 $main::locked_file_type{$realfile};
5030 delete($main::locked_file_data{$realfile});
5031 delete($main::locked_file_type{$realfile});
5035 =head2 test_lock(file)
5037 Returns 1 if some file is currently locked, 0 if not.
5042 my $realfile = &translate_filename($_[0]);
5043 return 0 if (!$_[0]);
5044 return 1 if (defined($main::locked_file_list{$realfile}));
5045 return 0 if (!&can_lock_file($realfile));
5047 if (open(LOCKING, "$realfile.lock")) {
5052 return $pid && kill(0, $pid);
5055 =head2 unlock_all_files
5057 Unlocks all files locked by the current script.
5060 sub unlock_all_files
5062 foreach $f (keys %main::locked_file_list) {
5067 =head2 can_lock_file(file)
5069 Returns 1 if some file should be locked, based on the settings in the
5070 Webmin Configuration module. For internal use by lock_file only.
5075 if (&is_readonly_mode()) {
5076 return 0; # never lock in read-only mode
5078 elsif ($gconfig{'lockmode'} == 0) {
5081 elsif ($gconfig{'lockmode'} == 1) {
5085 # Check if under any of the directories
5087 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
5088 if (&same_file($d, $_[0]) ||
5089 &is_under_directory($d, $_[0])) {
5093 return $gconfig{'lockmode'} == 2 ? $match : !$match;
5097 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
5099 Log some action taken by a user. This is typically called at the end of a
5100 script, once all file changes are complete and all commands run. The
5103 =item action - A short code for the action being performed, like 'create'.
5105 =item type - A code for the type of object the action is performed to, like 'user'.
5107 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
5109 =item params - A hash ref of additional information about the action.
5111 =item module - Name of the module in which the action was performed, which defaults to the current module.
5113 =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.
5115 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
5117 =item client-ip - IP address of the browser that performed the action.
5122 return if (!$gconfig{'log'} || &is_readonly_mode());
5123 my $m = $_[4] ? $_[4] : &get_module_name();
5125 if ($gconfig{'logclear'}) {
5126 # check if it is time to clear the log
5127 my @st = stat("$webmin_logfile.time");
5128 my $write_logtime = 0;
5130 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
5131 # clear logfile and all diff files
5132 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
5133 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
5134 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
5135 unlink($webmin_logfile);
5142 if ($write_logtime) {
5143 open(LOGTIME, ">$webmin_logfile.time");
5144 print LOGTIME time(),"\n";
5149 # If an action script directory is defined, call the appropriate scripts
5150 if ($gconfig{'action_script_dir'}) {
5151 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
5152 my ($basedir) = $gconfig{'action_script_dir'};
5154 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
5157 opendir(DIR, $dir) or die "Can't open $dir: $!";
5158 while (defined($file = readdir(DIR))) {
5159 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
5160 if (-x "$dir/$file") {
5161 # Call a script notifying it of the action
5163 $ENV{'ACTION_MODULE'} = &get_module_name();
5164 $ENV{'ACTION_ACTION'} = $_[0];
5165 $ENV{'ACTION_TYPE'} = $_[1];
5166 $ENV{'ACTION_OBJECT'} = $_[2];
5167 $ENV{'ACTION_SCRIPT'} = $script_name;
5168 foreach my $p (keys %param) {
5169 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5171 system("$dir/$file", @_,
5172 "<$null_file", ">$null_file", "2>&1");
5180 # should logging be done at all?
5181 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5182 split(/\s+/, $gconfig{'logusers'})) < 0);
5183 return if ($gconfig{'logmodules'} && &indexof($m,
5184 split(/\s+/, $gconfig{'logmodules'})) < 0);
5188 my @tm = localtime($now);
5189 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5190 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5191 $main::action_id_count++;
5192 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5193 $id, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5194 $tm[2], $tm[1], $tm[0],
5195 $remote_user || '-',
5196 $main::session_id || '-',
5197 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5198 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5199 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5201 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5202 my $v = $_[3]->{$k};
5208 elsif (ref($v) eq 'ARRAY') {
5212 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5213 $line .= " $k='$vv'";
5217 foreach $vv (split(/\0/, $v)) {
5219 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5220 $line .= " $k='$vv'";
5223 $param{$k} = join(" ", @pv);
5225 open(WEBMINLOG, ">>$webmin_logfile");
5226 print WEBMINLOG $line,"\n";
5228 if ($gconfig{'logperms'}) {
5229 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5232 chmod(0600, $webmin_logfile);
5235 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5236 # Find and record the changes made to any locked files, or commands run
5238 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5239 foreach my $d (@main::locked_file_diff) {
5240 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
5241 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
5242 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5243 print DIFFLOG $d->{'data'};
5245 if ($d->{'input'}) {
5246 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5247 print DIFFLOG $d->{'input'};
5250 if ($gconfig{'logperms'}) {
5251 chmod(oct($gconfig{'logperms'}),
5252 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
5253 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5257 @main::locked_file_diff = undef;
5260 if ($gconfig{'logfullfiles'}) {
5261 # Save the original contents of any modified files
5263 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5264 foreach my $f (keys %main::orig_file_data) {
5265 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
5266 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
5267 if (!defined($main::orig_file_type{$f})) {
5268 print ORIGLOG -1," ",$f,"\n";
5271 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5273 print ORIGLOG $main::orig_file_data{$f};
5275 if ($gconfig{'logperms'}) {
5276 chmod(oct($gconfig{'logperms'}),
5277 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
5281 %main::orig_file_data = undef;
5282 %main::orig_file_type = undef;
5285 if ($miniserv::page_capture_out) {
5286 # Save the whole page output
5287 mkdir("$ENV{'WEBMIN_VAR'}/output", 0700);
5288 open(PAGEOUT, ">$ENV{'WEBMIN_VAR'}/output/$id");
5289 print PAGEOUT $miniserv::page_capture_out;
5291 if ($gconfig{'logperms'}) {
5292 chmod(oct($gconfig{'logperms'}),
5293 "$ENV{'WEBMIN_VAR'}/output/$id");
5295 $miniserv::page_capture_out = undef;
5299 if ($gconfig{'logsyslog'}) {
5300 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5301 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5302 setlogsock("inet");';
5304 # Syslog module is installed .. try to convert to a
5305 # human-readable form
5307 my $mod = &get_module_name();
5308 my $mdir = module_root_directory($mod);
5309 if (-r "$mdir/log_parser.pl") {
5310 &foreign_require($mod, "log_parser.pl");
5312 foreach my $k (keys %{$_[3]}) {
5313 my $v = $_[3]->{$k};
5314 if (ref($v) eq 'ARRAY') {
5315 $params{$k} = join("\0", @$v);
5321 $msg = &foreign_call($mod, "parse_webmin_log",
5322 $remote_user, $script_name,
5323 $_[0], $_[1], $_[2], \%params);
5324 $msg =~ s/<[^>]*>//g; # Remove tags
5326 elsif ($_[0] eq "_config_") {
5327 my %wtext = &load_language("webminlog");
5328 $msg = $wtext{'search_config'};
5330 $msg ||= "$_[0] $_[1] $_[2]";
5331 my %info = &get_module_info($m);
5332 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5337 =head2 additional_log(type, object, data, [input])
5339 Records additional log data for an upcoming call to webmin_log, such
5340 as a command that was run or SQL that was executed. Typically you will never
5341 need to call this function directory.
5346 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5347 push(@main::locked_file_diff,
5348 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5349 'input' => $_[3] } );
5353 =head2 webmin_debug_log(type, message)
5355 Write something to the Webmin debug log. For internal use only.
5358 sub webmin_debug_log
5360 my ($type, $msg) = @_;
5361 return 0 if (!$main::opened_debug_log);
5362 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5363 if ($gconfig{'debug_modules'}) {
5364 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5365 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5368 eval 'use Time::HiRes qw(gettimeofday); ($now, $ms) = gettimeofday';
5370 my @tm = localtime($now);
5372 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d.%6.6d] %s %s %s %s \"%s\"",
5373 $$, $tm[3], ucfirst($number_to_month_map{$tm[4]}), $tm[5]+1900,
5374 $tm[2], $tm[1], $tm[0], $ms,
5375 $remote_user || "-",
5376 $ENV{'REMOTE_HOST'} || "-",
5377 &get_module_name() || "-",
5380 seek(main::DEBUGLOG, 0, 2);
5381 print main::DEBUGLOG $line."\n";
5385 =head2 system_logged(command)
5387 Just calls the Perl system() function, but also logs the command run.
5392 if (&is_readonly_mode()) {
5393 print STDERR "Vetoing command $_[0]\n";
5396 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5397 my $cmd = join(" ", @realcmd);
5399 if ($cmd =~ s/(\s*&\s*)$//) {
5402 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5403 $cmd =~ s/^\((.*)\)\s*$/$1/;
5405 &additional_log('exec', undef, $cmd);
5406 return system(@realcmd);
5409 =head2 backquote_logged(command)
5411 Executes a command and returns the output (like `command`), but also logs it.
5414 sub backquote_logged
5416 if (&is_readonly_mode()) {
5418 print STDERR "Vetoing command $_[0]\n";
5421 my $realcmd = &translate_command($_[0]);
5424 if ($cmd =~ s/(\s*&\s*)$//) {
5427 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5428 $cmd =~ s/^\((.*)\)\s*$/$1/;
5430 &additional_log('exec', undef, $cmd);
5431 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5435 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5437 Runs some command, waiting at most the given number of seconds for it to
5438 complete, and returns the output. The maxlines parameter sets the number
5439 of lines of output to capture. The safe parameter should be set to 1 if the
5440 command is safe for read-only mode users to run.
5443 sub backquote_with_timeout
5445 my $realcmd = &translate_command($_[0]);
5446 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5447 if ($gconfig{'debug_what_cmd'});
5449 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5454 my $elapsed = time() - $start;
5455 last if ($elapsed > $_[1]);
5457 vec($rmask, fileno(OUT), 1) = 1;
5458 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5459 last if (!$sel || $sel < 0);
5461 last if (!defined($line));
5464 if ($_[3] && $linecount >= $_[3]) {
5469 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5473 return wantarray ? ($out, $timed_out) : $out;
5476 =head2 backquote_command(command, safe?)
5478 Executes a command and returns the output (like `command`), subject to
5479 command translation. The safe parameter should be set to 1 if the command
5480 is safe for read-only mode users to run.
5483 sub backquote_command
5485 if (&is_readonly_mode() && !$_[1]) {
5486 print STDERR "Vetoing command $_[0]\n";
5490 my $realcmd = &translate_command($_[0]);
5491 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5495 =head2 kill_logged(signal, pid, ...)
5497 Like Perl's built-in kill function, but also logs the fact that some process
5498 was killed. On Windows, falls back to calling process.exe to terminate a
5504 return scalar(@_)-1 if (&is_readonly_mode());
5505 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5506 if ($gconfig{'debug_what_procs'});
5507 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5508 if ($gconfig{'os_type'} eq 'windows') {
5509 # Emulate some kills with process.exe
5510 my $arg = $_[0] eq "KILL" ? "-k" :
5511 $_[0] eq "TERM" ? "-q" :
5512 $_[0] eq "STOP" ? "-s" :
5513 $_[0] eq "CONT" ? "-r" : undef;
5515 foreach my $p (@_[1..@_-1]) {
5517 $ok ||= kill($_[0], $p);
5520 &execute_command("process $arg $p");
5532 =head2 rename_logged(old, new)
5534 Re-names a file and logs the rename. If the old and new files are on different
5535 filesystems, calls mv or the Windows rename function to do the job.
5540 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5541 return &rename_file($_[0], $_[1]);
5544 =head2 rename_file(old, new)
5546 Renames a file or directory. If the old and new files are on different
5547 filesystems, calls mv or the Windows rename function to do the job.
5552 if (&is_readonly_mode()) {
5553 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5556 my $src = &translate_filename($_[0]);
5557 my $dst = &translate_filename($_[1]);
5558 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5559 if ($gconfig{'debug_what_ops'});
5560 my $ok = rename($src, $dst);
5561 if (!$ok && $! !~ /permission/i) {
5562 # Try the mv command, in case this is a cross-filesystem rename
5563 if ($gconfig{'os_type'} eq 'windows') {
5564 # Need to use rename
5565 my $out = &backquote_command("rename ".quotemeta($_[0]).
5566 " ".quotemeta($_[1])." 2>&1");
5568 $! = $out if (!$ok);
5572 my $out = &backquote_command("mv ".quotemeta($_[0]).
5573 " ".quotemeta($_[1])." 2>&1");
5575 $! = $out if (!$ok);
5581 =head2 symlink_logged(src, dest)
5583 Create a symlink, and logs it. Effectively does the same thing as the Perl
5590 my $rv = &symlink_file($_[0], $_[1]);
5591 &unlock_file($_[1]);
5595 =head2 symlink_file(src, dest)
5597 Creates a soft link, unless in read-only mode. Effectively does the same thing
5598 as the Perl symlink function.
5603 if (&is_readonly_mode()) {
5604 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5607 my $src = &translate_filename($_[0]);
5608 my $dst = &translate_filename($_[1]);
5609 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5610 if ($gconfig{'debug_what_ops'});
5611 return symlink($src, $dst);
5614 =head2 link_file(src, dest)
5616 Creates a hard link, unless in read-only mode. The existing new link file
5617 will be deleted if necessary. Effectively the same as Perl's link function.
5622 if (&is_readonly_mode()) {
5623 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5626 my $src = &translate_filename($_[0]);
5627 my $dst = &translate_filename($_[1]);
5628 &webmin_debug_log('LINK', "src=$src dst=$dst")
5629 if ($gconfig{'debug_what_ops'});
5630 unlink($dst); # make sure link works
5631 return link($src, $dst);
5634 =head2 make_dir(dir, perms, recursive)
5636 Creates a directory and sets permissions on it, unless in read-only mode.
5637 The perms parameter sets the octal permissions to apply, which unlike Perl's
5638 mkdir will really get set. The recursive flag can be set to 1 to have the
5639 function create parent directories too.
5644 my ($dir, $perms, $recur) = @_;
5645 if (&is_readonly_mode()) {
5646 print STDERR "Vetoing directory $dir\n";
5649 $dir = &translate_filename($dir);
5650 my $exists = -d $dir ? 1 : 0;
5651 return 1 if ($exists && $recur); # already exists
5652 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5653 my $rv = mkdir($dir, $perms);
5654 if (!$rv && $recur) {
5655 # Failed .. try mkdir -p
5656 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5657 my $ex = &execute_command("mkdir $param "."e_path($dir));
5663 chmod($perms, $dir);
5668 =head2 set_ownership_permissions(user, group, perms, file, ...)
5670 Sets the user, group owner and permissions on some files. The parameters are :
5672 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5674 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5676 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5678 =item file - One or more files or directories to modify.
5681 sub set_ownership_permissions
5683 my ($user, $group, $perms, @files) = @_;
5684 if (&is_readonly_mode()) {
5685 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5688 @files = map { &translate_filename($_) } @files;
5689 if ($gconfig{'debug_what_ops'}) {
5690 foreach my $f (@files) {
5691 &webmin_debug_log('PERMS',
5692 "file=$f user=$user group=$group perms=$perms");
5696 if (defined($user)) {
5697 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5699 if (defined($group)) {
5700 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5703 my @uinfo = getpwuid($uid);
5706 $rv = chown($uid, $gid, @files);
5708 if ($rv && defined($perms)) {
5709 $rv = chmod($perms, @files);
5714 =head2 unlink_logged(file, ...)
5716 Like Perl's unlink function, but locks the files beforehand and un-locks them
5717 after so that the deletion is logged by Webmin.
5723 foreach my $f (@_) {
5724 if (!&test_lock($f)) {
5729 my @rv = &unlink_file(@_);
5730 foreach my $f (@_) {
5735 return wantarray ? @rv : $rv[0];
5738 =head2 unlink_file(file, ...)
5740 Deletes some files or directories. Like Perl's unlink function, but also
5741 recursively deletes directories with the rm command if needed.
5746 return 1 if (&is_readonly_mode());
5749 foreach my $f (@_) {
5750 &unflush_file_lines($f);
5751 my $realf = &translate_filename($f);
5752 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5754 if (!rmdir($realf)) {
5756 if ($gconfig{'os_type'} eq 'windows') {
5757 # Call del and rmdir commands
5760 my $out = `del /q "$qm" 2>&1`;
5762 $out = `rmdir "$qm" 2>&1`;
5767 my $qm = quotemeta($realf);
5768 $out = `rm -rf $qm 2>&1`;
5777 if (!unlink($realf)) {
5783 return wantarray ? ($rv, $err) : $rv;
5786 =head2 copy_source_dest(source, dest)
5788 Copy some file or directory to a new location. Returns 1 on success, or 0
5789 on failure - also sets $! on failure. If the source is a directory, uses
5790 piped tar commands to copy a whole directory structure including permissions
5794 sub copy_source_dest
5796 return (1, undef) if (&is_readonly_mode());
5797 my ($src, $dst) = @_;
5800 &webmin_debug_log('COPY', "src=$src dst=$dst")
5801 if ($gconfig{'debug_what_ops'});
5802 if ($gconfig{'os_type'} eq 'windows') {
5803 # No tar or cp on windows, so need to use copy command
5807 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5810 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5818 # A directory .. need to copy with tar command
5819 my @st = stat($src);
5822 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5823 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5830 # Can just copy with cp
5831 my $out = &backquote_logged("cp -p ".quotemeta($src).
5832 " ".quotemeta($dst)." 2>&1");
5838 return wantarray ? ($ok, $err) : $ok;
5841 =head2 remote_session_name(host|&server)
5843 Generates a session ID for some server. For this server, this will always
5844 be an empty string. For a server object it will include the hostname and
5845 port and PID. For a server name, it will include the hostname and PID. For
5849 sub remote_session_name
5851 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5852 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5853 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5854 ref($_[0]) ? "" : "$_[0].$$";
5857 =head2 remote_foreign_require(server, module, file)
5859 Connects to rpc.cgi on a remote webmin server and have it open a session
5860 to a process that will actually do the require and run functions. This is the
5861 equivalent for foreign_require, but for a remote Webmin system. The server
5862 parameter can either be a hostname of a system registered in the Webmin
5863 Servers Index module, or a hash reference for a system from that module.
5866 sub remote_foreign_require
5868 my $call = { 'action' => 'require',
5871 my $sn = &remote_session_name($_[0]);
5872 if ($remote_session{$sn}) {
5873 $call->{'session'} = $remote_session{$sn};
5876 $call->{'newsession'} = 1;
5878 my $rv = &remote_rpc_call($_[0], $call);
5879 if ($rv->{'session'}) {
5880 $remote_session{$sn} = $rv->{'session'};
5881 $remote_session_server{$sn} = $_[0];
5885 =head2 remote_foreign_call(server, module, function, [arg]*)
5887 Call a function on a remote server. Must have been setup first with
5888 remote_foreign_require for the same server and module. Equivalent to
5889 foreign_call, but with the extra server parameter to specify the remote
5893 sub remote_foreign_call
5895 return undef if (&is_readonly_mode());
5896 my $sn = &remote_session_name($_[0]);
5897 return &remote_rpc_call($_[0], { 'action' => 'call',
5900 'session' => $remote_session{$sn},
5901 'args' => [ @_[3 .. $#_] ] } );
5904 =head2 remote_foreign_check(server, module, [api-only])
5906 Checks if some module is installed and supported on a remote server. Equivilant
5907 to foreign_check, but for the remote Webmin system specified by the server
5911 sub remote_foreign_check
5913 return &remote_rpc_call($_[0], { 'action' => 'check',
5918 =head2 remote_foreign_config(server, module)
5920 Gets the configuration for some module from a remote server, as a hash.
5921 Equivalent to foreign_config, but for a remote system.
5924 sub remote_foreign_config
5926 return &remote_rpc_call($_[0], { 'action' => 'config',
5927 'module' => $_[1] });
5930 =head2 remote_eval(server, module, code)
5932 Evaluates some perl code in the context of a module on a remote webmin server.
5933 The server parameter must be the hostname of a remote system, module must
5934 be a module directory name, and code a string of Perl code to run. This can
5935 only be called after remote_foreign_require for the same server and module.
5940 return undef if (&is_readonly_mode());
5941 my $sn = &remote_session_name($_[0]);
5942 return &remote_rpc_call($_[0], { 'action' => 'eval',
5945 'session' => $remote_session{$sn} });
5948 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5950 Transfers some local file to another server via Webmin's RPC protocol, and
5951 returns the resulting remote filename. If the remotefile parameter is given,
5952 that is the destination filename which will be used. Otherwise a randomly
5953 selected temporary filename will be used, and returned by the function.
5958 return undef if (&is_readonly_mode());
5960 my $sn = &remote_session_name($_[0]);
5961 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5962 # Copy data over TCP connection
5963 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5965 'name' => $_[3] } );
5967 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5968 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5969 return &$main::remote_error_handler("Failed to transfer file : $error")
5972 while(read(FILE, $got, 1024) > 0) {
5976 shutdown(TWRITE, 1);
5978 if ($error && $error !~ /^OK/) {
5979 # Got back an error!
5980 return &$main::remote_error_handler("Failed to transfer file : $error");
5986 # Just pass file contents as parameters
5988 while(read(FILE, $got, 1024) > 0) {
5992 return &remote_rpc_call($_[0], { 'action' => 'write',
5995 'session' => $remote_session{$sn} });
5999 =head2 remote_read(server, localfile, remotefile)
6001 Transfers a file from a remote server to this system, using Webmin's RPC
6002 protocol. The server parameter must be the hostname of a system registered
6003 in the Webmin Servers Index module, localfile is the destination path on this
6004 system, and remotefile is the file to fetch from the remote server.
6009 my $sn = &remote_session_name($_[0]);
6010 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
6011 # Copy data over TCP connection
6012 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
6013 'file' => $_[2] } );
6015 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
6018 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
6019 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
6020 return &$main::remote_error_handler("Failed to transfer file : $error")
6023 open(FILE, ">$_[1]");
6024 while(read(TREAD, $got, 1024) > 0) {
6031 # Just get data as return value
6032 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
6034 'session' => $remote_session{$sn} });
6035 open(FILE, ">$_[1]");
6041 =head2 remote_finished
6043 Close all remote sessions. This happens automatically after a while
6044 anyway, but this function should be called to clean things up faster.
6049 foreach my $sn (keys %remote_session) {
6050 my $server = $remote_session_server{$sn};
6051 &remote_rpc_call($server, { 'action' => 'quit',
6052 'session' => $remote_session{$sn} } );
6053 delete($remote_session{$sn});
6054 delete($remote_session_server{$sn});
6056 foreach my $fh (keys %fast_fh_cache) {
6058 delete($fast_fh_cache{$fh});
6062 =head2 remote_error_setup(&function)
6064 Sets a function to be called instead of &error when a remote RPC operation
6065 fails. Useful if you want to have more control over your remote operations.
6068 sub remote_error_setup
6070 $main::remote_error_handler = $_[0] || \&error;
6073 =head2 remote_rpc_call(server, &structure)
6075 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
6076 and then reads back a reply structure. This is mainly for internal use only,
6077 and is called by the other remote_* functions.
6083 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
6085 # Server structure was given
6087 $serv->{'user'} || $serv->{'id'} == 0 ||
6088 return &$main::remote_error_handler(
6089 "No Webmin login set for server");
6092 # lookup the server in the webmin servers module if needed
6093 if (!%main::remote_servers_cache) {
6094 &foreign_require("servers", "servers-lib.pl");
6095 foreach $s (&foreign_call("servers", "list_servers")) {
6096 $main::remote_servers_cache{$s->{'host'}} = $s;
6097 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
6100 $serv = $main::remote_servers_cache{$_[0]};
6101 $serv || return &$main::remote_error_handler(
6102 "No Webmin Servers entry for $_[0]");
6103 $serv->{'user'} || return &$main::remote_error_handler(
6104 "No login set for server $_[0]");
6106 my $ip = $serv->{'ip'} || $serv->{'host'};
6108 # Work out the username and password
6110 if ($serv->{'sameuser'}) {
6111 $user = $remote_user;
6112 defined($main::remote_pass) || return &$main::remote_error_handler(
6113 "Password for this server is not available");
6114 $pass = $main::remote_pass;
6117 $user = $serv->{'user'};
6118 $pass = $serv->{'pass'};
6121 if ($serv->{'fast'} || !$sn) {
6122 # Make TCP connection call to fastrpc.cgi
6123 if (!$fast_fh_cache{$sn} && $sn) {
6124 # Need to open the connection
6125 my $con = &make_http_connection(
6126 $ip, $serv->{'port'}, $serv->{'ssl'},
6127 "POST", "/fastrpc.cgi");
6128 return &$main::remote_error_handler(
6129 "Failed to connect to $serv->{'host'} : $con")
6131 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6132 &write_http_connection($con, "User-agent: Webmin\r\n");
6133 my $auth = &encode_base64("$user:$pass");
6135 &write_http_connection($con, "Authorization: basic $auth\r\n");
6136 &write_http_connection($con, "Content-length: ",
6137 length($tostr),"\r\n");
6138 &write_http_connection($con, "\r\n");
6139 &write_http_connection($con, $tostr);
6141 # read back the response
6142 my $line = &read_http_connection($con);
6143 $line =~ tr/\r\n//d;
6144 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6145 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6147 $line =~ /^HTTP\/1\..\s+200\s+/ ||
6148 return &$main::remote_error_handler("HTTP error : $line");
6150 $line = &read_http_connection($con);
6151 $line =~ tr/\r\n//d;
6153 $line = &read_http_connection($con);
6154 if ($line =~ /^0\s+(.*)/) {
6155 return &$main::remote_error_handler("RPC error : $1");
6157 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
6158 $line =~ /^1\s+(\S+)\s+(\S+)/) {
6159 # Started ok .. connect and save SID
6160 &close_http_connection($con);
6161 my ($port, $sid, $version, $error) = ($1, $2, $3);
6162 &open_socket($ip, $port, $sid, \$error);
6163 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
6165 $fast_fh_cache{$sn} = $sid;
6166 $remote_server_version{$sn} = $version;
6169 while($stuff = &read_http_connection($con)) {
6172 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
6175 elsif (!$fast_fh_cache{$sn}) {
6176 # Open the connection by running fastrpc.cgi locally
6177 pipe(RPCOUTr, RPCOUTw);
6181 open(STDOUT, ">&RPCOUTw");
6185 $ENV{'REQUEST_METHOD'} = 'GET';
6186 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6187 $ENV{'SERVER_ROOT'} ||= $root_directory;
6189 if ($base_remote_user ne 'root' &&
6190 $base_remote_user ne 'admin') {
6191 # Need to fake up a login for the CGI!
6192 &read_acl(undef, \%acl, [ 'root' ]);
6193 $ENV{'BASE_REMOTE_USER'} =
6194 $ENV{'REMOTE_USER'} =
6195 $acl{'root'} ? 'root' : 'admin';
6197 delete($ENV{'FOREIGN_MODULE_NAME'});
6198 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6199 chdir($root_directory);
6200 if (!exec("$root_directory/fastrpc.cgi")) {
6201 print "exec failed : $!\n";
6208 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6212 if ($line =~ /^0\s+(.*)/) {
6213 return &$main::remote_error_handler("RPC error : $2");
6215 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6216 # Started ok .. connect and save SID
6218 my ($port, $sid, $error) = ($1, $2, undef);
6219 &open_socket("localhost", $port, $sid, \$error);
6220 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6221 $fast_fh_cache{$sn} = $sid;
6228 &error("Bad response from fastrpc.cgi : $line");
6231 # Got a connection .. send off the request
6232 my $fh = $fast_fh_cache{$sn};
6233 my $tostr = &serialise_variable($_[1]);
6234 print $fh length($tostr)," $fh\n";
6238 return &$main::remote_error_handler(
6239 "Error reading response length from fastrpc.cgi : $!")
6241 my $rlen = int($rstr);
6242 my ($fromstr, $got);
6243 while(length($fromstr) < $rlen) {
6244 return &$main::remote_error_handler(
6245 "Failed to read from fastrpc.cgi : $!")
6246 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6249 my $from = &unserialise_variable($fromstr);
6251 # No response at all
6252 return &$main::remote_error_handler("Remote Webmin error");
6254 elsif (ref($from) ne 'HASH') {
6256 return &$main::remote_error_handler(
6257 "Invalid remote Webmin response : $from");
6259 elsif (!$from->{'status'}) {
6261 $from->{'rv'} =~ s/\s+at\s+(\S+)\s+line\s+(\d+)(,\s+<\S+>\s+line\s+(\d+))?//;
6262 return &$main::remote_error_handler($from->{'rv'});
6264 if (defined($from->{'arv'})) {
6265 return @{$from->{'arv'}};
6268 return $from->{'rv'};
6272 # Call rpc.cgi on remote server
6273 my $tostr = &serialise_variable($_[1]);
6275 my $con = &make_http_connection($ip, $serv->{'port'},
6276 $serv->{'ssl'}, "POST", "/rpc.cgi");
6277 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6279 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6280 &write_http_connection($con, "User-agent: Webmin\r\n");
6281 my $auth = &encode_base64("$user:$pass");
6283 &write_http_connection($con, "Authorization: basic $auth\r\n");
6284 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6285 &write_http_connection($con, "\r\n");
6286 &write_http_connection($con, $tostr);
6288 # read back the response
6289 my $line = &read_http_connection($con);
6290 $line =~ tr/\r\n//d;
6291 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6292 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6294 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6296 $line = &read_http_connection($con);
6297 $line =~ tr/\r\n//d;
6300 while($line = &read_http_connection($con)) {
6304 my $from = &unserialise_variable($fromstr);
6305 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6306 if (defined($from->{'arv'})) {
6307 return @{$from->{'arv'}};
6310 return $from->{'rv'};
6315 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6317 Executes some function in parallel on multiple servers at once. Fills in
6318 the returns and errors arrays respectively. If the module and library
6319 parameters are given, that module is remotely required on the server first,
6320 to check if it is connectable. The parameters are :
6322 =item servers - A list of Webmin system hash references.
6324 =item parallel - Number of parallel operations to perform.
6326 =item function - Reference to function to call for each system.
6328 =item args - Additional parameters to the function.
6330 =item returns - Array ref to place return values into, in same order as servers.
6332 =item errors - Array ref to place error messages into.
6334 =item module - Optional module to require on the remote system first.
6336 =item library - Optional library to require in the module.
6339 sub remote_multi_callback
6341 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6342 &remote_error_setup(\&remote_multi_callback_error);
6344 # Call the functions
6346 foreach my $g (@$servs) {
6352 $remote_multi_callback_err = undef;
6354 # Require the remote lib
6355 &remote_foreign_require($g->{'host'}, $mod, $lib);
6356 if ($remote_multi_callback_err) {
6357 # Failed .. return error
6358 print $wh &serialise_variable(
6359 [ undef, $remote_multi_callback_err ]);
6365 my $a = ref($args) ? $args->[$p] : $args;
6366 my $rv = &$func($g, $a);
6369 print $wh &serialise_variable(
6370 [ $rv, $remote_multi_callback_err ]);
6378 # Read back the results
6380 foreach my $g (@$servs) {
6384 $errs->[$p] = "Failed to read response from $g->{'host'}";
6387 my $rv = &unserialise_variable($line);
6389 $rets->[$p] = $rv->[0];
6390 $errs->[$p] = $rv->[1];
6395 &remote_error_setup(undef);
6398 sub remote_multi_callback_error
6400 $remote_multi_callback_err = $_[0];
6403 =head2 serialise_variable(variable)
6405 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6406 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6407 called on each member to serialize the entire object.
6410 sub serialise_variable
6412 if (!defined($_[0])) {
6418 $rv = &urlize($_[0]);
6420 elsif ($r eq 'SCALAR') {
6421 $rv = &urlize(${$_[0]});
6423 elsif ($r eq 'ARRAY') {
6424 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6426 elsif ($r eq 'HASH') {
6427 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6428 &urlize(&serialise_variable($_[0]->{$_})) }
6431 elsif ($r eq 'REF') {
6432 $rv = &serialise_variable(${$_[0]});
6434 elsif ($r eq 'CODE') {
6439 # An object - treat as a hash
6440 $r = "OBJECT ".&urlize($r);
6441 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6442 &urlize(&serialise_variable($_[0]->{$_})) }
6445 return ($r ? $r : 'VAL').",".$rv;
6448 =head2 unserialise_variable(string)
6450 Converts a string created by serialise_variable() back into the original
6451 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6452 object, the same class is used on this system, if available.
6455 sub unserialise_variable
6457 my @v = split(/,/, $_[0]);
6459 if ($v[0] eq 'VAL') {
6460 @v = split(/,/, $_[0], -1);
6461 $rv = &un_urlize($v[1]);
6463 elsif ($v[0] eq 'SCALAR') {
6464 local $r = &un_urlize($v[1]);
6467 elsif ($v[0] eq 'ARRAY') {
6469 for(my $i=1; $i<@v; $i++) {
6470 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6473 elsif ($v[0] eq 'HASH') {
6475 for(my $i=1; $i<@v; $i+=2) {
6476 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6477 &unserialise_variable(&un_urlize($v[$i+1]));
6480 elsif ($v[0] eq 'REF') {
6481 local $r = &unserialise_variable($v[1]);
6484 elsif ($v[0] eq 'UNDEF') {
6487 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6488 # An object hash that we have to re-bless
6491 for(my $i=1; $i<@v; $i+=2) {
6492 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6493 &unserialise_variable(&un_urlize($v[$i+1]));
6501 =head2 other_groups(user)
6503 Returns a list of secondary groups a user is a member of, as a list of
6512 while(my @g = getgrent()) {
6513 my @m = split(/\s+/, $g[3]);
6514 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6516 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6520 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6522 Returns HTML for a button that pops up a data chooser window. The parameters
6525 =item dayfield - Name of the text field to place the day of the month into.
6527 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6529 =item yearfield - Name of the text field to place the year into.
6532 sub date_chooser_button
6534 return &theme_date_chooser_button(@_)
6535 if (defined(&theme_date_chooser_button));
6536 my ($w, $h) = (250, 225);
6537 if ($gconfig{'db_sizedate'}) {
6538 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6540 return "<input type=button onClick='window.dfield = form.$_[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";
6543 =head2 help_file(module, file)
6545 Returns the path to a module's help file of some name, typically under the
6546 help directory with a .html extension.
6551 my $mdir = &module_root_directory($_[0]);
6552 my $dir = "$mdir/help";
6553 foreach my $o (@lang_order_list) {
6554 my $lang = "$dir/$_[1].$o.html";
6555 return $lang if (-r $lang);
6557 return "$dir/$_[1].html";
6562 Seeds the random number generator, if not already done in this script. On Linux
6563 this makes use of the current time, process ID and a read from /dev/urandom.
6564 On other systems, only the current time and process ID are used.
6569 if (!$main::done_seed_random) {
6570 if (open(RANDOM, "/dev/urandom")) {
6572 read(RANDOM, $buf, 4);
6574 srand(time() ^ $$ ^ $buf);
6579 $main::done_seed_random = 1;
6583 =head2 disk_usage_kb(directory)
6585 Returns the number of kB used by some directory and all subdirs. Implemented
6586 by calling the C<du -k> command.
6591 my $dir = &translate_filename($_[0]);
6593 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6595 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6597 return $out =~ /^([0-9]+)/ ? $1 : "???";
6600 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6602 Returns the number of bytes taken up by all files in some directory and all
6603 sub-directories, by summing up their lengths. The disk_usage_kb is more
6604 reflective of reality, as the filesystem typically pads file sizes to 1k or
6608 sub recursive_disk_usage
6610 my $dir = &translate_filename($_[0]);
6617 my @st = stat($dir);
6623 my @files = readdir(DIR);
6625 foreach my $f (@files) {
6626 next if ($f eq "." || $f eq "..");
6627 next if ($skip && $f =~ /$skip/);
6628 next if ($only && $f !~ /$only/);
6629 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6635 =head2 help_search_link(term, [ section, ... ] )
6637 Returns HTML for a link to the man module for searching local and online
6638 docs for various search terms. The term parameter can either be a single
6639 word like 'bind', or a space-separated list of words. This function is typically
6640 used by modules that want to refer users to additional documentation in man
6641 pages or local system doc files.
6644 sub help_search_link
6646 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6647 my $for = &urlize(shift(@_));
6648 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6649 join("&", map { "section=$_" } @_)."&".
6650 "for=$for&exact=1&check=".&get_module_name()."'>".
6651 $text{'helpsearch'}."</a>\n";
6658 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6660 Opens a connection to some HTTP server, maybe through a proxy, and returns
6661 a handle object. The handle can then be used to send additional headers
6662 and read back a response. If anything goes wrong, returns an error string.
6663 The parameters are :
6665 =item host - Hostname or IP address of the webserver to connect to.
6667 =item port - HTTP port number to connect to.
6669 =item ssl - Set to 1 to connect in SSL mode.
6671 =item method - HTTP method, like GET or POST.
6673 =item page - Page to request on the webserver, like /foo/index.html
6675 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6678 sub make_http_connection
6680 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6683 foreach my $h (@$headers) {
6684 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6688 if (&is_readonly_mode()) {
6689 return "HTTP connections not allowed in readonly mode";
6691 my $rv = { 'fh' => time().$$ };
6694 eval "use Net::SSLeay";
6695 $@ && return $text{'link_essl'};
6696 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6697 eval "Net::SSLeay::load_error_strings()";
6698 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6699 return "Failed to create SSL context";
6700 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6701 return "Failed to create SSL connection";
6703 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6704 !&no_proxy($host)) {
6707 &open_socket($1, $2, $rv->{'fh'}, \$error);
6710 my $fh = $rv->{'fh'};
6711 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6712 if ($gconfig{'proxy_user'}) {
6713 my $auth = &encode_base64(
6714 "$gconfig{'proxy_user'}:".
6715 "$gconfig{'proxy_pass'}");
6716 $auth =~ tr/\r\n//d;
6717 print $fh "Proxy-Authorization: Basic $auth\r\n";
6721 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6722 return "Proxy error : $3" if ($2 != 200);
6725 return "Proxy error : $line";
6730 elsif (!$gconfig{'proxy_fallback'}) {
6731 # Connection to proxy failed - give up
6738 &open_socket($host, $port, $rv->{'fh'}, \$error);
6739 return $error if ($error);
6741 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6742 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6743 return "SSL connect() failed";
6744 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6745 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6748 # Plain HTTP request
6750 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6751 !&no_proxy($host)) {
6754 &open_socket($1, $2, $rv->{'fh'}, \$error);
6758 my $fh = $rv->{'fh'};
6759 my $rtxt = $method." ".
6760 "http://$host:$port$page HTTP/1.0\r\n";
6761 if ($gconfig{'proxy_user'}) {
6762 my $auth = &encode_base64(
6763 "$gconfig{'proxy_user'}:".
6764 "$gconfig{'proxy_pass'}");
6765 $auth =~ tr/\r\n//d;
6766 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6771 elsif (!$gconfig{'proxy_fallback'}) {
6776 # Connecting directly
6778 &open_socket($host, $port, $rv->{'fh'}, \$error);
6779 return $error if ($error);
6780 my $fh = $rv->{'fh'};
6781 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6788 =head2 read_http_connection(&handle, [bytes])
6790 Reads either one line or up to the specified number of bytes from the handle,
6791 originally supplied by make_http_connection.
6794 sub read_http_connection
6798 if ($h->{'ssl_con'}) {
6801 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6802 # need to read more..
6803 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6805 $rv = $h->{'buffer'};
6806 delete($h->{'buffer'});
6809 $h->{'buffer'} .= $more;
6811 $rv = substr($h->{'buffer'}, 0, $idx+1);
6812 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6815 if (length($h->{'buffer'})) {
6816 $rv = $h->{'buffer'};
6817 delete($h->{'buffer'});
6820 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6826 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6829 my $fh = $h->{'fh'};
6833 $rv = undef if ($rv eq "");
6837 =head2 write_http_connection(&handle, [data+])
6839 Writes the given data to the given HTTP connection handle.
6842 sub write_http_connection
6845 my $fh = $h->{'fh'};
6847 if ($h->{'ssl_ctx'}) {
6848 foreach my $s (@_) {
6849 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6850 $allok = 0 if (!$ok);
6854 my $ok = (print $fh @_);
6855 $allok = 0 if (!$ok);
6860 =head2 close_http_connection(&handle)
6862 Closes a connection to an HTTP server, identified by the given handle.
6865 sub close_http_connection
6871 =head2 clean_environment
6873 Deletes any environment variables inherited from miniserv so that they
6874 won't be passed to programs started by webmin. This is useful when calling
6875 programs that check for CGI-related environment variables and modify their
6876 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6879 sub clean_environment
6881 %UNCLEAN_ENV = %ENV;
6882 foreach my $k (keys %ENV) {
6883 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6887 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6888 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6889 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6890 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6891 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6892 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6893 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6894 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6900 =head2 reset_environment
6902 Puts the environment back how it was before clean_environment was callled.
6905 sub reset_environment
6908 foreach my $k (keys %UNCLEAN_ENV) {
6909 $ENV{$k} = $UNCLEAN_ENV{$k};
6911 undef(%UNCLEAN_ENV);
6915 =head2 progress_callback
6917 Never called directly, but useful for passing to &http_download to print
6918 out progress of an HTTP request.
6921 sub progress_callback
6923 if (defined(&theme_progress_callback)) {
6924 # Call the theme override
6925 return &theme_progress_callback(@_);
6929 print $progress_callback_prefix;
6931 $progress_size = $_[1];
6932 $progress_step = int($_[1] / 10);
6933 print &text('progress_size2', $progress_callback_url,
6934 &nice_size($progress_size)),"<br>\n";
6937 $progress_size = undef;
6938 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6940 $last_progress_time = $last_progress_size = undef;
6942 elsif ($_[0] == 3) {
6944 my $sp = $progress_callback_prefix.(" " x 5);
6945 if ($progress_size) {
6946 # And we have a size to compare against
6947 my $st = int(($_[1] * 10) / $progress_size);
6948 my $time_now = time();
6949 if ($st != $progress_step ||
6950 $time_now - $last_progress_time > 60) {
6951 # Show progress every 10% or 60 seconds
6952 print $sp,&text('progress_datan', &nice_size($_[1]),
6953 int($_[1]*100/$progress_size)),"<br>\n";
6954 $last_progress_time = $time_now;
6956 $progress_step = $st;
6959 # No total size .. so only show in 100k jumps
6960 if ($_[1] > $last_progress_size+100*1024) {
6961 print $sp,&text('progress_data2n',
6962 &nice_size($_[1])),"<br>\n";
6963 $last_progress_size = $_[1];
6967 elsif ($_[0] == 4) {
6968 # All done downloading
6969 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6971 elsif ($_[0] == 5) {
6972 # Got new location after redirect
6973 $progress_callback_url = $_[1];
6975 elsif ($_[0] == 6) {
6977 $progress_callback_url = $_[1];
6978 print &text('progress_incache', $progress_callback_url),"<br>\n";
6982 =head2 switch_to_remote_user
6984 Changes the user and group of the current process to that of the unix user
6985 with the same name as the current webmin login, or fails if there is none.
6986 This should be called by Usermin module scripts that only need to run with
6987 limited permissions.
6990 sub switch_to_remote_user
6992 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6994 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6995 &create_missing_homedir(\@remote_user_info);
6997 &switch_to_unix_user(\@remote_user_info);
6998 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6999 $ENV{'HOME'} = $remote_user_info[7];
7001 # Export global variables to caller
7002 if ($main::export_to_caller) {
7003 my ($callpkg) = caller();
7004 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
7008 =head2 switch_to_unix_user(&user-details)
7010 Switches the current process to the UID and group ID from the given list
7011 of user details, which must be in the format returned by getpwnam.
7014 sub switch_to_unix_user
7017 if (!defined($uinfo->[0])) {
7018 # No username given, so just use given GID
7019 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
7022 # Use all groups from user
7023 ($(, $)) = ( $uinfo->[3],
7024 "$uinfo->[3] ".join(" ", $uinfo->[3],
7025 &other_groups($uinfo->[0])) );
7028 POSIX::setuid($uinfo->[2]);
7030 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
7031 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
7035 =head2 eval_as_unix_user(username, &code)
7037 Runs some code fragment with the effective UID and GID switch to that
7038 of the given Unix user, so that file IO takes place with his permissions.
7042 sub eval_as_unix_user
7044 my ($user, $code) = @_;
7045 my @uinfo = getpwnam($user);
7046 if (!scalar(@uinfo)) {
7047 &error("eval_as_unix_user called with invalid user $user");
7049 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
7053 local $main::error_must_die = 1;
7060 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
7063 return wantarray ? @rv : $rv[0];
7066 =head2 create_user_config_dirs
7068 Creates per-user config directories and sets $user_config_directory and
7069 $user_module_config_directory to them. Also reads per-user module configs
7070 into %userconfig. This should be called by Usermin module scripts that need
7071 to store per-user preferences or other settings.
7074 sub create_user_config_dirs
7076 return if (!$gconfig{'userconfig'});
7077 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
7078 return if (!@uinfo || !$uinfo[7]);
7079 &create_missing_homedir(\@uinfo);
7080 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
7081 if (!-d $user_config_directory) {
7082 mkdir($user_config_directory, 0700) ||
7083 &error("Failed to create $user_config_directory : $!");
7084 if ($< == 0 && $uinfo[2]) {
7085 chown($uinfo[2], $uinfo[3], $user_config_directory);
7088 if (&get_module_name()) {
7089 $user_module_config_directory = $user_config_directory."/".
7091 if (!-d $user_module_config_directory) {
7092 mkdir($user_module_config_directory, 0700) ||
7093 &error("Failed to create $user_module_config_directory : $!");
7094 if ($< == 0 && $uinfo[2]) {
7095 chown($uinfo[2], $uinfo[3], $user_config_directory);
7099 &read_file_cached("$module_root_directory/defaultuconfig",
7101 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
7102 &read_file_cached("$user_module_config_directory/config",
7106 # Export global variables to caller
7107 if ($main::export_to_caller) {
7108 my ($callpkg) = caller();
7109 foreach my $v ('$user_config_directory',
7110 '$user_module_config_directory', '%userconfig') {
7111 my ($vt, $vn) = split('', $v, 2);
7112 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
7117 =head2 create_missing_homedir(&uinfo)
7119 If auto homedir creation is enabled, create one for this user if needed.
7120 For internal use only.
7123 sub create_missing_homedir
7126 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
7127 # Use has no home dir .. make one
7128 system("mkdir -p ".quotemeta($uinfo->[7]));
7129 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
7130 if ($gconfig{'create_homedir_perms'} ne '') {
7131 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
7136 =head2 filter_javascript(text)
7138 Disables all javascript <script>, onClick= and so on tags in the given HTML,
7139 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
7142 sub filter_javascript
7145 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
7146 $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;
7147 $rv =~ s/(javascript:)/x$1/gi;
7148 $rv =~ s/(vbscript:)/x$1/gi;
7152 =head2 resolve_links(path)
7154 Given a path that may contain symbolic links, returns the real path.
7160 $path =~ s/\/+/\//g;
7161 $path =~ s/\/$// if ($path ne "/");
7162 my @p = split(/\/+/, $path);
7164 for(my $i=0; $i<@p; $i++) {
7165 my $sofar = "/".join("/", @p[0..$i]);
7166 my $lnk = readlink($sofar);
7167 if ($lnk eq $sofar) {
7168 # Link to itself! Cannot do anything more really ..
7171 elsif ($lnk =~ /^\//) {
7172 # Link is absolute..
7173 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
7177 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
7183 =head2 simplify_path(path, bogus)
7185 Given a path, maybe containing elements ".." and "." , convert it to a
7186 clean, absolute form. Returns undef if this is not possible.
7194 my @bits = split(/\/+/, $dir);
7197 foreach my $b (@bits) {
7201 elsif ($b eq "..") {
7203 if (scalar(@fixedbits) == 0) {
7204 # Cannot! Already at root!
7211 push(@fixedbits, $b);
7214 return "/".join('/', @fixedbits);
7217 =head2 same_file(file1, file2)
7219 Returns 1 if two files are actually the same
7224 return 1 if ($_[0] eq $_[1]);
7225 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7226 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7227 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7228 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7229 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7230 return 0 if (!@stat1 || !@stat2);
7231 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7234 =head2 flush_webmin_caches
7236 Clears all in-memory and on-disk caches used by Webmin.
7239 sub flush_webmin_caches
7241 undef(%main::read_file_cache);
7242 undef(%main::acl_hash_cache);
7243 undef(%main::acl_array_cache);
7244 undef(%main::has_command_cache);
7245 undef(@main::list_languages_cache);
7246 undef($main::got_list_usermods_cache);
7247 undef(@main::list_usermods_cache);
7248 undef(%main::foreign_installed_cache);
7249 unlink("$config_directory/module.infos.cache");
7250 &get_all_module_infos();
7253 =head2 list_usermods
7255 Returns a list of additional module restrictions. For internal use in
7261 if (!$main::got_list_usermods_cache) {
7262 @main::list_usermods_cache = ( );
7264 open(USERMODS, "$config_directory/usermin.mods");
7266 if (/^([^:]+):(\+|-|):(.*)/) {
7267 push(@main::list_usermods_cache,
7268 [ $1, $2, [ split(/\s+/, $3) ] ]);
7272 $main::got_list_usermods_cache = 1;
7274 return @main::list_usermods_cache;
7277 =head2 available_usermods(&allmods, &usermods)
7279 Returns a list of modules that are available to the given user, based
7280 on usermod additional/subtractions. For internal use by Usermin only.
7283 sub available_usermods
7285 return @{$_[0]} if (!@{$_[1]});
7287 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7288 my @uinfo = @remote_user_info;
7289 @uinfo = getpwnam($remote_user) if (!@uinfo);
7290 foreach my $u (@{$_[1]}) {
7292 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7295 elsif ($u->[0] =~ /^\@(.*)$/) {
7296 # Check for group membership
7297 my @ginfo = getgrnam($1);
7298 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7299 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7301 elsif ($u->[0] =~ /^\//) {
7302 # Check users and groups in file
7304 open(USERFILE, $u->[0]);
7307 if ($_ eq $remote_user) {
7310 elsif (/^\@(.*)$/) {
7311 my @ginfo = getgrnam($1);
7313 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7314 &indexof($remote_user,
7315 split(/\s+/, $ginfo[3])) >= 0));
7322 if ($u->[1] eq "+") {
7323 map { $mods{$_}++ } @{$u->[2]};
7325 elsif ($u->[1] eq "-") {
7326 map { delete($mods{$_}) } @{$u->[2]};
7330 map { $mods{$_}++ } @{$u->[2]};
7334 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7337 =head2 get_available_module_infos(nocache)
7339 Returns a list of modules available to the current user, based on
7340 operating system support, access control and usermod restrictions. Useful
7341 in themes that need to display a list of modules the user can use.
7342 Each element of the returned array is a hash reference in the same format as
7343 returned by get_module_info.
7346 sub get_available_module_infos
7349 &read_acl(\%acl, \%uacl, [ $base_remote_user ]);
7350 my $risk = $gconfig{'risk_'.$base_remote_user};
7352 foreach my $minfo (&get_all_module_infos($_[0])) {
7353 next if (!&check_os_support($minfo));
7355 # Check module risk level
7356 next if ($risk ne 'high' && $minfo->{'risk'} &&
7357 $minfo->{'risk'} !~ /$risk/);
7361 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7362 !$acl{$base_remote_user,"*"});
7364 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7368 # Check usermod restrictions
7369 my @usermods = &list_usermods();
7370 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7371 &available_usermods(\@rv, \@usermods);
7373 # Check RBAC restrictions
7375 foreach my $m (@rv) {
7376 if (&supports_rbac($m->{'dir'}) &&
7377 &use_rbac_module_acl(undef, $m->{'dir'})) {
7378 local $rbacs = &get_rbac_module_acl($remote_user,
7386 # Module or system doesn't support RBAC
7387 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7393 if (defined(&theme_foreign_available)) {
7394 foreach my $m (@rbacrv) {
7395 if (&theme_foreign_available($m->{'dir'})) {
7404 # Check licence module vetos
7406 if ($main::licence_module) {
7407 foreach my $m (@themerv) {
7408 if (&foreign_call($main::licence_module,
7409 "check_module_licence", $m->{'dir'})) {
7421 =head2 get_visible_module_infos(nocache)
7423 Like get_available_module_infos, but excludes hidden modules from the list.
7424 Each element of the returned array is a hash reference in the same format as
7425 returned by get_module_info.
7428 sub get_visible_module_infos
7431 my $pn = &get_product_name();
7432 return grep { !$_->{'hidden'} &&
7433 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7436 =head2 get_visible_modules_categories(nocache)
7438 Returns a list of Webmin module categories, each of which is a hash ref
7439 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7440 of modules in the category, in the format returned by get_module_info.
7441 Un-used modules are automatically assigned to the 'unused' category, and
7442 those with no category are put into 'others'.
7445 sub get_visible_modules_categories
7448 my @mods = &get_visible_module_infos($nocache);
7450 if (&get_product_name() eq 'webmin') {
7451 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7452 @mods = grep { $_->{'installed'} ne '0' } @mods;
7454 my %cats = &list_categories(\@mods);
7456 foreach my $c (keys %cats) {
7457 my $cat = { 'code' => $c || 'other',
7458 'desc' => $cats{$c} };
7459 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7462 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7463 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7465 # Add un-installed modules in magic category
7466 my $cat = { 'code' => 'unused',
7467 'desc' => $text{'main_unused'},
7469 'modules' => \@unmods };
7475 =head2 is_under_directory(directory, file)
7477 Returns 1 if the given file is under the specified directory, 0 if not.
7478 Symlinks are taken into account in the file to find it's 'real' location.
7481 sub is_under_directory
7483 my ($dir, $file) = @_;
7484 return 1 if ($dir eq "/");
7485 return 0 if ($file =~ /\.\./);
7486 my $ld = &resolve_links($dir);
7488 return &is_under_directory($ld, $file);
7490 my $lp = &resolve_links($file);
7492 return &is_under_directory($dir, $lp);
7494 return 0 if (length($file) < length($dir));
7495 return 1 if ($dir eq $file);
7497 return substr($file, 0, length($dir)) eq $dir;
7500 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7502 Given an absolute URL, returns the host, port, page and ssl flag components.
7503 If a username and password are given before the hostname, return those too.
7504 Relative URLs can also be parsed, if the base information is provided.
7509 if ($_[0] =~ /^(http|https):\/\/([^\@]+\@)?\[([^\]]+)\](:(\d+))?(\/\S*)?$/ ||
7510 $_[0] =~ /^(http|https):\/\/([^\@]+\@)?([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7512 my $ssl = $1 eq 'https';
7513 my @rv = ($3, $4 ? $5 : $ssl ? 443 : 80, $6 || "/", $ssl);
7514 if ($2 =~ /^([^:]+):(\S+)\@/) {
7523 elsif ($_[0] =~ /^\/\S*$/) {
7524 # A relative to the server URL
7525 return ($_[1], $_[2], $_[0], $_[4], $_[5], $_[6]);
7528 # A relative to the directory URL
7530 $page =~ s/[^\/]+$//;
7531 return ($_[1], $_[2], $page.$_[0], $_[4], $_[5], $_[6]);
7535 =head2 check_clicks_function
7537 Returns HTML for a JavaScript function called check_clicks that returns
7538 true when first called, but false subsequently. Useful on onClick for
7539 critical buttons. Deprecated, as this method of preventing duplicate actions
7543 sub check_clicks_function
7548 function check_clicks(form)
7555 for(i=0; i<form.length; i++)
7556 form.elements[i].disabled = true;
7565 =head2 load_entities_map
7567 Returns a hash ref containing mappings between HTML entities (like ouml) and
7568 ascii values (like 246). Mainly for internal use.
7571 sub load_entities_map
7573 if (!%entities_map_cache) {
7575 open(EMAP, "$root_directory/entities_map.txt");
7577 if (/^(\d+)\s+(\S+)/) {
7578 $entities_map_cache{$2} = $1;
7583 return \%entities_map_cache;
7586 =head2 entities_to_ascii(string)
7588 Given a string containing HTML entities like ö and 7, replace them
7589 with their ASCII equivalents.
7592 sub entities_to_ascii
7595 my $emap = &load_entities_map();
7596 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7597 $str =~ s/&#(\d+);/chr($1)/ge;
7601 =head2 get_product_name
7603 Returns either 'webmin' or 'usermin', depending on which program the current
7604 module is in. Useful for modules that can be installed into either.
7607 sub get_product_name
7609 return $gconfig{'product'} if (defined($gconfig{'product'}));
7610 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7615 Returns the character set for the current language, such as iso-8859-1.
7620 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7621 $current_lang_info->{'charset'} ?
7622 $current_lang_info->{'charset'} : $default_charset;
7626 =head2 get_display_hostname
7628 Returns the system's hostname for UI display purposes. This may be different
7629 from the actual hostname if you administrator has configured it so in the
7630 Webmin Configuration module.
7633 sub get_display_hostname
7635 if ($gconfig{'hostnamemode'} == 0) {
7636 return &get_system_hostname();
7638 elsif ($gconfig{'hostnamemode'} == 3) {
7639 return $gconfig{'hostnamedisplay'};
7642 my $h = $ENV{'HTTP_HOST'};
7644 if ($gconfig{'hostnamemode'} == 2) {
7645 $h =~ s/^(www|ftp|mail)\.//i;
7651 =head2 save_module_config([&config], [modulename])
7653 Saves the configuration for some module. The config parameter is an optional
7654 hash reference of names and values to save, which defaults to the global
7655 %config hash. The modulename parameter is the module to update the config
7656 file, which defaults to the current module.
7659 sub save_module_config
7661 my $c = $_[0] || { &get_module_variable('%config') };
7662 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7663 &write_file("$config_directory/$m/config", $c);
7666 =head2 save_user_module_config([&config], [modulename])
7668 Saves the user's Usermin preferences for some module. The config parameter is
7669 an optional hash reference of names and values to save, which defaults to the
7670 global %userconfig hash. The modulename parameter is the module to update the
7671 config file, which defaults to the current module.
7674 sub save_user_module_config
7676 my $c = $_[0] || { &get_module_variable('%userconfig') };
7677 my $m = $_[1] || &get_module_name();
7678 my $ucd = $user_config_directory;
7680 my @uinfo = @remote_user_info ? @remote_user_info
7681 : getpwnam($remote_user);
7682 return if (!@uinfo || !$uinfo[7]);
7683 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7685 &write_file("$ucd/$m/config", $c);
7688 =head2 nice_size(bytes, [min])
7690 Converts a number of bytes into a number followed by a suffix like GB, MB
7691 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7692 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7697 my ($units, $uname);
7698 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7699 $units = 1024*1024*1024*1024;
7702 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7703 $units = 1024*1024*1024;
7706 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7710 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7718 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7720 return $sz." ".$uname;
7723 =head2 get_perl_path
7725 Returns the path to Perl currently in use, such as /usr/bin/perl.
7730 if (open(PERL, "$config_directory/perl-path")) {
7736 return $^X if (-x $^X);
7737 return &has_command("perl");
7740 =head2 get_goto_module([&mods])
7742 Returns the details of a module that the current user should be re-directed
7743 to after logging in, or undef if none. Useful for themes.
7748 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7749 if ($gconfig{'gotomodule'}) {
7750 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7751 return $goto if ($goto);
7753 if (@mods == 1 && $gconfig{'gotoone'}) {
7759 =head2 select_all_link(field, form, [text])
7761 Returns HTML for a 'Select all' link that uses Javascript to select
7762 multiple checkboxes with the same name. The parameters are :
7764 =item field - Name of the checkbox inputs.
7766 =item form - Index of the form on the page.
7768 =item text - Message for the link, defaulting to 'Select all'.
7773 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7774 my ($field, $form, $text) = @_;
7776 $text ||= $text{'ui_selall'};
7777 return "<a class='select_all' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = true; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = true; } } return false'>$text</a>";
7780 =head2 select_invert_link(field, form, text)
7782 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7783 selection on multiple checkboxes with the same name. The parameters are :
7785 =item field - Name of the checkbox inputs.
7787 =item form - Index of the form on the page.
7789 =item text - Message for the link, defaulting to 'Invert selection'.
7792 sub select_invert_link
7794 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7795 my ($field, $form, $text) = @_;
7797 $text ||= $text{'ui_selinv'};
7798 return "<a class='select_invert' href='#' onClick='var ff = document.forms[$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>";
7801 =head2 select_rows_link(field, form, text, &rows)
7803 Returns HTML for a link that uses Javascript to select rows with particular
7804 values for their checkboxes. The parameters are :
7806 =item field - Name of the checkbox inputs.
7808 =item form - Index of the form on the page.
7810 =item text - Message for the link, de
7812 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7815 sub select_rows_link
7817 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7818 my ($field, $form, $text, $rows) = @_;
7820 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7821 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7822 $js .= "return false;";
7823 return "<a href='#' onClick='$js'>$text</a>";
7826 =head2 check_pid_file(file)
7828 Given a pid file, returns the PID it contains if the process is running.
7833 open(PIDFILE, $_[0]) || return undef;
7834 my $pid = <PIDFILE>;
7836 $pid =~ /^\s*(\d+)/ || return undef;
7837 kill(0, $1) || return undef;
7843 Return the local os-specific library name to this module. For internal use only.
7848 my $mn = &get_module_name();
7849 my $md = &module_root_directory($mn);
7850 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7851 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7853 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7854 return "$mn-$gconfig{'os_type'}-lib.pl";
7856 elsif (-r "$md/$mn-generic-lib.pl") {
7857 return "$mn-generic-lib.pl";
7864 =head2 module_root_directory(module)
7866 Given a module name, returns its root directory. On a typical Webmin install,
7867 all modules are under the same directory - but it is theoretically possible to
7871 sub module_root_directory
7873 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7874 if (@root_directories > 1) {
7875 foreach my $r (@root_directories) {
7881 return "$root_directories[0]/$d";
7884 =head2 list_mime_types
7886 Returns a list of all known MIME types and their extensions, as a list of hash
7887 references with keys :
7889 =item type - The MIME type, like text/plain.
7891 =item exts - A list of extensions, like .doc and .avi.
7893 =item desc - A human-readable description for the MIME type.
7898 if (!@list_mime_types_cache) {
7900 open(MIME, "$root_directory/mime.types");
7904 if (s/#\s*(.*)$//g) {
7907 my ($type, @exts) = split(/\s+/);
7909 push(@list_mime_types_cache, { 'type' => $type,
7916 return @list_mime_types_cache;
7919 =head2 guess_mime_type(filename, [default])
7921 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7922 The optional default parameter sets a default type of use if none is found,
7923 which defaults to application/octet-stream.
7928 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7930 foreach my $t (&list_mime_types()) {
7931 foreach my $e (@{$t->{'exts'}}) {
7932 return $t->{'type'} if (lc($e) eq lc($ext));
7936 return @_ > 1 ? $_[1] : "application/octet-stream";
7939 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7941 Opens a file handle for writing to a temporary file, which will only be
7942 renamed over the real file when the handle is closed. This allows critical
7943 files like /etc/shadow to be updated safely, even if writing fails part way
7944 through due to lack of disk space. The parameters are :
7946 =item handle - File handle to open, as you would use in Perl's open function.
7948 =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.
7950 =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 $! with the error code.
7952 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7954 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7960 # Just getting a temp file
7961 if (!defined($main::open_tempfiles{$_[0]})) {
7962 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7963 my $dir = $1 || "/";
7964 my $tmp = "$dir/$2.webmintmp.$$";
7965 $main::open_tempfiles{$_[0]} = $tmp;
7966 push(@main::temporary_files, $tmp);
7968 return $main::open_tempfiles{$_[0]};
7972 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7973 $fh = &callers_package($fh);
7975 my %gaccess = &get_module_acl(undef, "");
7976 my $db = $gconfig{'debug_what_write'};
7977 if ($file =~ /\r|\n|\0/) {
7978 if ($noerror) { return 0; }
7979 else { &error("Filename contains invalid characters"); }
7981 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7982 # Read-only mode .. veto all writes
7983 print STDERR "vetoing write to $file\n";
7984 return open($fh, ">$null_file");
7986 elsif ($file =~ /^(>|>>|)nul$/i) {
7987 # Write to Windows null device
7988 &webmin_debug_log($1 eq ">" ? "WRITE" :
7989 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7991 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7992 # Writes to /dev/null or TTYs don't need to be handled
7993 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7994 return open($fh, $file);
7996 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7997 &webmin_debug_log("WRITE", $1) if ($db);
7998 # Over-writing a file, via a temp file
8000 $file = &translate_filename($file);
8002 # Open the link target instead
8003 $file = &resolve_links($file);
8006 # Cannot open a directory!
8007 if ($noerror) { return 0; }
8008 else { &error("Cannot write to directory $file"); }
8010 my $tmp = &open_tempfile($file);
8011 my $ex = open($fh, ">$tmp");
8012 if (!$ex && $! =~ /permission/i) {
8013 # Could not open temp file .. try opening actual file
8015 $ex = open($fh, ">$file");
8016 delete($main::open_tempfiles{$file});
8019 $main::open_temphandles{$fh} = $file;
8022 if (!$ex && !$noerror) {
8023 &error(&text("efileopen", $file, $!));
8027 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
8028 # Just writing direct to a file
8029 &webmin_debug_log("WRITE", $1) if ($db);
8031 $file = &translate_filename($file);
8032 my @old_attributes = &get_clear_file_attributes($file);
8033 my $ex = open($fh, ">$file");
8034 &reset_file_attributes($file, \@old_attributes);
8035 $main::open_temphandles{$fh} = $file;
8036 if (!$ex && !$noerror) {
8037 &error(&text("efileopen", $file, $!));
8042 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
8043 # Appending to a file .. nothing special to do
8044 &webmin_debug_log("APPEND", $1) if ($db);
8046 $file = &translate_filename($file);
8047 my @old_attributes = &get_clear_file_attributes($file);
8048 my $ex = open($fh, ">>$file");
8049 &reset_file_attributes($file, \@old_attributes);
8050 $main::open_temphandles{$fh} = $file;
8051 if (!$ex && !$noerror) {
8052 &error(&text("efileopen", $file, $!));
8057 elsif ($file =~ /^([a-zA-Z]:)?\//) {
8058 # Read mode .. nothing to do here
8059 &webmin_debug_log("READ", $file) if ($db);
8060 $file = &translate_filename($file);
8061 return open($fh, $file);
8063 elsif ($file eq ">" || $file eq ">>") {
8064 my ($package, $filename, $line) = caller;
8065 if ($noerror) { return 0; }
8066 else { &error("Missing file to open at ${package}::${filename} line $line"); }
8069 my ($package, $filename, $line) = caller;
8070 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
8075 =head2 close_tempfile(file|handle)
8077 Copies a temp file to the actual file, assuming that all writes were
8078 successful. The handle must have been one passed to open_tempfile.
8084 my $fh = &callers_package($_[0]);
8086 if (defined($file = $main::open_temphandles{$fh})) {
8088 close($fh) || &error(&text("efileclose", $file, $!));
8089 delete($main::open_temphandles{$fh});
8090 return &close_tempfile($file);
8092 elsif (defined($main::open_tempfiles{$_[0]})) {
8094 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
8095 my @st = stat($_[0]);
8096 if (&is_selinux_enabled() && &has_command("chcon")) {
8097 # Set original security context
8098 system("chcon --reference=".quotemeta($_[0]).
8099 " ".quotemeta($main::open_tempfiles{$_[0]}).
8100 " >/dev/null 2>&1");
8102 my @old_attributes = &get_clear_file_attributes($_[0]);
8103 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
8105 # Set original permissions and ownership
8106 chmod($st[2], $_[0]);
8107 chown($st[4], $st[5], $_[0]);
8109 &reset_file_attributes($_[0], \@old_attributes);
8110 delete($main::open_tempfiles{$_[0]});
8111 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
8112 if ($main::open_templocks{$_[0]}) {
8113 &unlock_file($_[0]);
8114 delete($main::open_templocks{$_[0]});
8119 # Must be closing a handle not associated with a file
8125 =head2 print_tempfile(handle, text, ...)
8127 Like the normal print function, but calls &error on failure. Useful when
8128 combined with open_tempfile, to ensure that a criticial file is never
8129 only partially written.
8134 my ($fh, @args) = @_;
8135 $fh = &callers_package($fh);
8136 (print $fh @args) || &error(&text("efilewrite",
8137 $main::open_temphandles{$fh} || $fh, $!));
8140 =head2 is_selinux_enabled
8142 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
8145 sub is_selinux_enabled
8147 if (!defined($main::selinux_enabled_cache)) {
8149 if ($gconfig{'os_type'} !~ /-linux$/) {
8150 # Not on linux, so no way
8151 $main::selinux_enabled_cache = 0;
8153 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
8154 # Use global config file
8155 $main::selinux_enabled_cache =
8156 $seconfig{'SELINUX'} eq 'disabled' ||
8157 !$seconfig{'SELINUX'} ? 0 : 1;
8160 # Use selinuxenabled command
8161 #$selinux_enabled_cache =
8162 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
8163 $main::selinux_enabled_cache = 0;
8166 return $main::selinux_enabled_cache;
8169 =head2 get_clear_file_attributes(file)
8171 Finds file attributes that may prevent writing, clears them and returns them
8172 as a list. May call error. Mainly for internal use by open_tempfile and
8176 sub get_clear_file_attributes
8180 if ($gconfig{'chattr'}) {
8181 # Get original immutable bit
8182 my $out = &backquote_command(
8183 "lsattr ".quotemeta($file)." 2>/dev/null");
8185 $out =~ s/\s\S+\n//;
8186 @old_attributes = grep { $_ ne '-' } split(//, $out);
8188 if (&indexof("i", @old_attributes) >= 0) {
8189 my $err = &backquote_logged(
8190 "chattr -i ".quotemeta($file)." 2>&1");
8192 &error("Failed to remove immutable bit on ".
8197 return @old_attributes;
8200 =head2 reset_file_attributes(file, &attributes)
8202 Put back cleared attributes on some file. May call error. Mainly for internal
8203 use by close_tempfile.
8206 sub reset_file_attributes
8208 my ($file, $old_attributes) = @_;
8209 if (&indexof("i", @$old_attributes) >= 0) {
8210 my $err = &backquote_logged(
8211 "chattr +i ".quotemeta($file)." 2>&1");
8213 &error("Failed to restore immutable bit on ".
8219 =head2 cleanup_tempnames
8221 Remove all temporary files generated using transname. Typically only called
8222 internally when a Webmin script exits.
8225 sub cleanup_tempnames
8227 foreach my $t (@main::temporary_files) {
8230 @main::temporary_files = ( );
8233 =head2 open_lock_tempfile([handle], file, [no-error])
8235 Returns a temporary file for writing to some actual file, and also locks it.
8236 Effectively the same as calling lock_file and open_tempfile on the same file,
8237 but calls the unlock for you automatically when it is closed.
8240 sub open_lock_tempfile
8242 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8243 $fh = &callers_package($fh);
8244 my $lockfile = $file;
8245 $lockfile =~ s/^[^\/]*//;
8246 if ($lockfile =~ /^\//) {
8247 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8249 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8254 $main::end_exit_status ||= $?;
8255 if ($$ == $main::initial_process_id) {
8256 # Exiting from initial process
8257 &cleanup_tempnames();
8258 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8259 $main::debug_log_start_module eq &get_module_name()) {
8260 my $len = time() - $main::debug_log_start_time;
8261 &webmin_debug_log("STOP", "runtime=$len");
8262 $main::debug_log_start_time = 0;
8264 if (!$ENV{'SCRIPT_NAME'} &&
8265 $main::initial_module_name eq &get_module_name()) {
8266 # In a command-line script - call the real exit, so that the
8267 # exit status gets properly propogated. In some cases this
8268 # was not happening.
8269 exit($main::end_exit_status);
8274 =head2 month_to_number(month)
8276 Converts a month name like feb to a number like 1.
8281 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8284 =head2 number_to_month(number)
8286 Converts a number like 1 to a month name like Feb.
8291 return ucfirst($number_to_month_map{$_[0]});
8294 =head2 get_rbac_module_acl(user, module)
8296 Returns a hash reference of RBAC overrides ACLs for some user and module.
8297 May return undef if none exist (indicating access denied), or the string *
8298 if full access is granted.
8301 sub get_rbac_module_acl
8303 my ($user, $mod) = @_;
8304 eval "use Authen::SolarisRBAC";
8305 return undef if ($@);
8308 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8309 # Automagic webmin.modulename.admin authorization exists .. allow access
8311 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8312 %rv = ( 'noconfig' => 1 );
8319 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8323 my ($auths, $acls) = split(/\s+/, $_);
8324 my @auths = split(/,/, $auths);
8326 my ($merge) = ($acls =~ s/^\+//);
8328 if ($auths eq "*") {
8329 # These ACLs apply to all RBAC users.
8330 # Only if there is some that match a specific authorization
8331 # later will they be used though.
8334 # Check each of the RBAC authorizations
8335 foreach my $a (@auths) {
8336 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8341 $foundany++ if ($gotall);
8344 # Found an RBAC authorization - return the ACLs
8345 return "*" if ($acls eq "*");
8346 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8348 # Just add to current set
8349 foreach my $a (keys %acl) {
8360 return !$foundany ? undef : %rv ? \%rv : undef;
8363 =head2 supports_rbac([module])
8365 Returns 1 if RBAC client support is available, such as on Solaris.
8370 return 0 if ($gconfig{'os_type'} ne 'solaris');
8371 eval "use Authen::SolarisRBAC";
8374 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8379 =head2 supports_ipv6()
8381 Returns 1 if outgoing IPv6 connections can be made
8386 return $ipv6_module_error ? 0 : 1;
8389 =head2 use_rbac_module_acl(user, module)
8391 Returns 1 if some user should use RBAC to get permissions for a module
8394 sub use_rbac_module_acl
8396 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8397 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8398 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8399 my %access = &get_module_acl($u, $m, 1);
8400 return $access{'rbac'} ? 1 : 0;
8403 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8405 Runs some command, possibly feeding it input and capturing output to the
8406 give files or scalar references. The parameters are :
8408 =item command - Full command to run, possibly including shell meta-characters.
8410 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8412 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8414 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8416 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8418 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8423 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8424 if (&is_readonly_mode() && !$safe) {
8425 print STDERR "Vetoing command $_[0]\n";
8429 $cmd = &translate_command($cmd);
8431 # Use ` operator where possible
8432 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8433 if (!$stdin && ref($stdout) && !$stderr) {
8434 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8435 $$stdout = `$cmd 2>$null_file`;
8438 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8439 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8440 $$stdout = `$cmd 2>&1`;
8443 elsif (!$stdin && !$stdout && !$stderr) {
8444 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8445 return system("$cmd >$null_file 2>$null_file <$null_file");
8449 $| = 1; # needed on some systems to flush before forking
8450 pipe(EXECSTDINr, EXECSTDINw);
8451 pipe(EXECSTDOUTr, EXECSTDOUTw);
8452 pipe(EXECSTDERRr, EXECSTDERRw);
8454 if (!($pid = fork())) {
8458 open(STDIN, "<&EXECSTDINr");
8459 open(STDOUT, ">&EXECSTDOUTw");
8460 if (ref($stderr) && $stderr eq $stdout) {
8461 open(STDERR, ">&EXECSTDOUTw");
8464 open(STDERR, ">&EXECSTDERRw");
8471 my $fullcmd = "($cmd)";
8472 if ($stdin && !ref($stdin)) {
8473 $fullcmd .= " <$stdin";
8475 if ($stdout && !ref($stdout)) {
8476 $fullcmd .= " >$stdout";
8478 if ($stderr && !ref($stderr)) {
8479 if ($stderr eq $stdout) {
8480 $fullcmd .= " 2>&1";
8483 $fullcmd .= " 2>$stderr";
8486 if ($gconfig{'os_type'} eq 'windows') {
8490 exec("/bin/sh", "-c", $fullcmd);
8492 print "Exec failed : $!\n";
8499 # Feed input and capture output
8501 if ($stdin && ref($stdin)) {
8502 print EXECSTDINw $$stdin;
8505 if ($stdout && ref($stdout)) {
8507 while(<EXECSTDOUTr>) {
8512 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8514 while(<EXECSTDERRr>) {
8525 =head2 open_readfile(handle, file)
8527 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8528 exactly the same as Perl's open function.
8533 my ($fh, $file) = @_;
8534 $fh = &callers_package($fh);
8535 my $realfile = &translate_filename($file);
8536 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8537 return open($fh, "<".$realfile);
8540 =head2 open_execute_command(handle, command, output?, safe?)
8542 Runs some command, with the specified file handle set to either write to it if
8543 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8544 indicates if the command modifies the state of the system or not.
8547 sub open_execute_command
8549 my ($fh, $cmd, $mode, $safe) = @_;
8550 $fh = &callers_package($fh);
8551 my $realcmd = &translate_command($cmd);
8552 if (&is_readonly_mode() && !$safe) {
8553 # Don't actually run it
8554 print STDERR "vetoing command $cmd\n";
8557 return open($fh, ">$null_file");
8560 return open($fh, $null_file);
8564 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8565 if ($gconfig{'debug_what_cmd'});
8567 return open($fh, "| $cmd");
8569 elsif ($mode == 1) {
8570 return open($fh, "$cmd 2>$null_file |");
8572 elsif ($mode == 2) {
8573 return open($fh, "$cmd 2>&1 |");
8577 =head2 translate_filename(filename)
8579 Applies all relevant registered translation functions to a filename. Mostly
8580 for internal use, and typically does nothing.
8583 sub translate_filename
8585 my ($realfile) = @_;
8586 my @funcs = grep { $_->[0] eq &get_module_name() ||
8587 !defined($_->[0]) } @main::filename_callbacks;
8588 foreach my $f (@funcs) {
8590 $realfile = &$func($realfile, @{$f->[2]});
8595 =head2 translate_command(filename)
8597 Applies all relevant registered translation functions to a command. Mostly
8598 for internal use, and typically does nothing.
8601 sub translate_command
8604 my @funcs = grep { $_->[0] eq &get_module_name() ||
8605 !defined($_->[0]) } @main::command_callbacks;
8606 foreach my $f (@funcs) {
8608 $realcmd = &$func($realcmd, @{$f->[2]});
8613 =head2 register_filename_callback(module|undef, &function, &args)
8615 Registers some function to be called when the specified module (or all
8616 modules) tries to open a file for reading and writing. The function must
8617 return the actual file to open. This allows you to override which files
8618 other code actually operates on, via the translate_filename function.
8621 sub register_filename_callback
8623 my ($mod, $func, $args) = @_;
8624 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8627 =head2 register_command_callback(module|undef, &function, &args)
8629 Registers some function to be called when the specified module (or all
8630 modules) tries to execute a command. The function must return the actual
8631 command to run. This allows you to override which commands other other code
8632 actually runs, via the translate_command function.
8635 sub register_command_callback
8637 my ($mod, $func, $args) = @_;
8638 push(@main::command_callbacks, [ $mod, $func, $args ]);
8641 =head2 capture_function_output(&function, arg, ...)
8643 Captures output that some function prints to STDOUT, and returns it. Useful
8644 for functions outside your control that print data when you really want to
8645 manipulate it before output.
8648 sub capture_function_output
8650 my ($func, @args) = @_;
8651 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8652 my $old = select(SOCKET1);
8653 my @rv = &$func(@args);
8662 return wantarray ? ($out, \@rv) : $out;
8665 =head2 capture_function_output_tempfile(&function, arg, ...)
8667 Behaves the same as capture_function_output, but uses a temporary file
8668 to avoid buffer full problems.
8671 sub capture_function_output_tempfile
8673 my ($func, @args) = @_;
8674 my $temp = &transname();
8675 open(BUFFER, ">$temp");
8676 my $old = select(BUFFER);
8677 my @rv = &$func(@args);
8680 my $out = &read_file_contents($temp);
8681 &unlink_file($temp);
8682 return wantarray ? ($out, \@rv) : $out;
8685 =head2 modules_chooser_button(field, multiple, [form])
8687 Returns HTML for a button for selecting one or many Webmin modules.
8688 field - Name of the HTML field to place the module names into.
8689 multiple - Set to 1 if multiple modules can be selected.
8690 form - Index of the form on the page.
8693 sub modules_chooser_button
8695 return &theme_modules_chooser_button(@_)
8696 if (defined(&theme_modules_chooser_button));
8697 my $form = defined($_[2]) ? $_[2] : 0;
8698 my $w = $_[1] ? 700 : 500;
8700 if ($_[1] && $gconfig{'db_sizemodules'}) {
8701 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8703 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8704 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8706 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";
8709 =head2 substitute_template(text, &hash)
8711 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8712 the text replaces it with the value of the hash key foo. Also supports blocks
8713 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8714 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8717 sub substitute_template
8719 # Add some extra fixed parameters to the hash
8720 my %hash = %{$_[1]};
8721 $hash{'hostname'} = &get_system_hostname();
8722 $hash{'webmin_config'} = $config_directory;
8723 $hash{'webmin_etc'} = $config_directory;
8724 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8725 $hash{'webmin_var'} = $var_directory;
8727 # Add time-based parameters, for use in DNS
8728 $hash{'current_time'} = time();
8729 my @tm = localtime($hash{'current_time'});
8730 $hash{'current_year'} = $tm[5]+1900;
8731 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8732 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8733 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8734 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8735 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8737 # Actually do the substition
8739 foreach my $s (keys %hash) {
8740 next if ($s eq ''); # Prevent just $ from being subbed
8743 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8744 $rv =~ s/\$\Q$us\E/$sv/g;
8746 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8747 # and ${IF}..${ENDIF} with value
8748 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8749 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8751 # Replace $IF..$ELSE..$ENDIF block with first value,
8752 # and $IF..$ENDIF with value
8753 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8754 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8756 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8757 # matching, nothing if not
8758 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8759 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8761 # Replace $IFEQ..$ENDIFEQ block with first value if
8762 # matching, nothing if not
8763 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8764 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8767 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8768 # and ${IF}..${ENDIF} with nothing
8769 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8770 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8772 # Replace $IF..$ELSE..$ENDIF block with second value,
8773 # and $IF..$ENDIF with nothing
8774 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8775 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8777 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8778 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8779 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8783 # Now assume any $IF blocks whose variables are not present in the hash
8784 # evaluate to false.
8785 # $IF...$ELSE x $ENDIF => x
8786 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8787 # $IF...x...$ENDIF => (nothing)
8788 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8789 # ${var} => (nothing)
8790 $rv =~ s/\$\{[A-Z]+\}//g;
8795 =head2 running_in_zone
8797 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8798 disable module and features that are not appropriate, like those that modify
8799 mounted filesystems.
8804 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8805 $gconfig{'os_version'} < 10);
8806 my $zn = `zonename 2>$null_file`;
8808 return $zn && $zn ne "global";
8811 =head2 running_in_vserver
8813 Returns 1 if the current Webmin instance is running in a Linux VServer.
8814 Used to disable modules and features that are not appropriate.
8817 sub running_in_vserver
8819 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8822 open(MTAB, "/etc/mtab");
8824 my ($dev, $mp) = split(/\s+/, $_);
8825 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8834 =head2 running_in_xen
8836 Returns 1 if Webmin is running inside a Xen instance, by looking
8837 at /proc/xen/capabilities.
8842 return 0 if (!-r "/proc/xen/capabilities");
8843 my $cap = &read_file_contents("/proc/xen/capabilities");
8844 return $cap =~ /control_d/ ? 0 : 1;
8847 =head2 running_in_openvz
8849 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8850 at /proc/vz/veinfo for a non-zero line.
8853 sub running_in_openvz
8855 return 0 if (!-r "/proc/vz/veinfo");
8856 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8857 return 0 if (!$lref || !@$lref);
8858 foreach my $l (@$lref) {
8860 my @ll = split(/\s+/, $l);
8861 return 0 if ($ll[0] eq '0');
8866 =head2 list_categories(&modules, [include-empty])
8868 Returns a hash mapping category codes to names, including any custom-defined
8869 categories. The modules parameter must be an array ref of module hash objects,
8870 as returned by get_all_module_infos.
8875 my ($mods, $empty) = @_;
8876 my (%cats, %catnames);
8877 &read_file("$config_directory/webmin.catnames", \%catnames);
8878 foreach my $o (@lang_order_list) {
8879 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8884 foreach my $m (@$mods) {
8885 my $c = $m->{'category'};
8886 next if ($cats{$c});
8887 if (defined($catnames{$c})) {
8888 $cats{$c} = $catnames{$c};
8890 elsif ($text{"category_$c"}) {
8891 $cats{$c} = $text{"category_$c"};
8894 # try to get category name from module ..
8895 my %mtext = &load_language($m->{'dir'});
8896 if ($mtext{"category_$c"}) {
8897 $cats{$c} = $mtext{"category_$c"};
8900 $c = $m->{'category'} = "";
8901 $cats{$c} = $text{"category_$c"};
8908 =head2 is_readonly_mode
8910 Returns 1 if the current user is in read-only mode, and thus all writes
8911 to files and command execution should fail.
8914 sub is_readonly_mode
8916 if (!defined($main::readonly_mode_cache)) {
8917 my %gaccess = &get_module_acl(undef, "");
8918 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8920 return $main::readonly_mode_cache;
8923 =head2 command_as_user(user, with-env?, command, ...)
8925 Returns a command to execute some command as the given user, using the
8926 su statement. If on Linux, the /bin/sh shell is forced in case the user
8927 does not have a valid shell. If with-env is set to 1, the -s flag is added
8928 to the su command to read the user's .profile or .bashrc file.
8933 my ($user, $env, @args) = @_;
8934 my @uinfo = getpwnam($user);
8935 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8936 # User shell doesn't appear to be valid
8937 if ($gconfig{'os_type'} =~ /-linux$/) {
8938 # Use -s /bin/sh to force it
8939 $shellarg = " -s /bin/sh";
8941 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8942 $gconfig{'os_type'} eq 'solaris' &&
8943 $gconfig{'os_version'} >= 11 ||
8944 $gconfig{'os_type'} eq 'macos') {
8945 # Use -m and force /bin/sh
8946 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8950 my $rv = "su".($env ? " -" : "").$shellarg.
8951 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8955 =head2 list_osdn_mirrors(project, file)
8957 This function is now deprecated in favor of letting sourceforge just
8958 redirect to the best mirror, and now just returns their primary download URL.
8961 sub list_osdn_mirrors
8963 my ($project, $file) = @_;
8964 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8966 'mirror' => 'downloads' } );
8969 =head2 convert_osdn_url(url)
8971 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8972 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8973 to a real URL on the sourceforge download redirector.
8976 sub convert_osdn_url
8979 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8980 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8981 # Always use the Sourceforge mail download URL, which does
8982 # a location-based redirect for us
8983 my ($project, $file) = ($1, $2);
8984 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8986 return wantarray ? ( $url, 0 ) : $url;
8989 # Some other source .. don't change
8990 return wantarray ? ( $url, 2 ) : $url;
8994 =head2 get_current_dir
8996 Returns the directory the current process is running in.
9002 if ($gconfig{'os_type'} eq 'windows') {
9015 =head2 supports_users
9017 Returns 1 if the current OS supports Unix user concepts and functions like
9018 su , getpw* and so on. This will be true on Linux and other Unixes, but false
9024 return $gconfig{'os_type'} ne 'windows';
9027 =head2 supports_symlinks
9029 Returns 1 if the current OS supports symbolic and hard links. This will not
9030 be the case on Windows.
9033 sub supports_symlinks
9035 return $gconfig{'os_type'} ne 'windows';
9038 =head2 quote_path(path)
9040 Returns a path with safe quoting for the current operating system.
9046 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
9047 # Windows only supports "" style quoting
9051 return quotemeta($path);
9055 =head2 get_windows_root
9057 Returns the base windows system directory, like c:/windows.
9060 sub get_windows_root
9062 if ($ENV{'SystemRoot'}) {
9063 my $rv = $ENV{'SystemRoot'};
9068 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
9072 =head2 read_file_contents(file)
9074 Given a filename, returns its complete contents as a string. Effectively
9075 the same as the Perl construct `cat file`.
9078 sub read_file_contents
9080 &open_readfile(FILE, $_[0]) || return undef;
9087 =head2 unix_crypt(password, salt)
9089 Performs Unix encryption on a password, using the built-in crypt function or
9090 the Crypt::UnixCrypt module if the former does not work. The salt parameter
9091 must be either an already-hashed password, or a two-character alpha-numeric
9097 my ($pass, $salt) = @_;
9098 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
9099 my $rv = eval "crypt(\$pass, \$salt)";
9101 return $rv if ($rv && !$@);
9102 eval "use Crypt::UnixCrypt";
9104 return Crypt::UnixCrypt::crypt($pass, $salt);
9107 &error("Failed to encrypt password : $err");
9111 =head2 split_quoted_string(string)
9113 Given a string like I<foo "bar baz" quux>, returns the array :
9117 sub split_quoted_string
9121 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
9122 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
9123 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
9130 =head2 write_to_http_cache(url, file|&data)
9132 Updates the Webmin cache with the contents of the given file, possibly also
9133 clearing out old data. Mainly for internal use by http_download.
9136 sub write_to_http_cache
9138 my ($url, $file) = @_;
9139 return 0 if (!$gconfig{'cache_size'});
9141 # Don't cache downloads that look dynamic
9142 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
9146 # Check if the current module should do caching
9147 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9148 # Caching all except some modules
9149 my @mods = split(/\s+/, $1);
9150 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9152 elsif ($gconfig{'cache_mods'}) {
9153 # Only caching some modules
9154 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9155 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9161 $size = length($$file);
9164 my @st = stat($file);
9168 if ($size > $gconfig{'cache_size'}) {
9169 # Bigger than the whole cache - so don't save it
9174 $cfile = "$main::http_cache_directory/$cfile";
9176 # See how much we have cached currently, clearing old files
9178 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
9179 opendir(CACHEDIR, $main::http_cache_directory);
9180 foreach my $f (readdir(CACHEDIR)) {
9181 next if ($f eq "." || $f eq "..");
9182 my $path = "$main::http_cache_directory/$f";
9183 my @st = stat($path);
9184 if ($gconfig{'cache_days'} &&
9185 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9186 # This file is too old .. trash it
9191 push(@cached, [ $path, $st[7], $st[9] ]);
9195 @cached = sort { $a->[2] <=> $b->[2] } @cached;
9196 while($total+$size > $gconfig{'cache_size'} && @cached) {
9197 # Cache is too big .. delete some files until the new one will fit
9198 unlink($cached[0]->[0]);
9199 $total -= $cached[0]->[1];
9203 # Finally, write out the new file
9205 &open_tempfile(CACHEFILE, ">$cfile");
9206 &print_tempfile(CACHEFILE, $$file);
9207 &close_tempfile(CACHEFILE);
9210 my ($ok, $err) = ©_source_dest($file, $cfile);
9216 =head2 check_in_http_cache(url)
9218 If some URL is in the cache and valid, return the filename for it. Mainly
9219 for internal use by http_download.
9222 sub check_in_http_cache
9225 return undef if (!$gconfig{'cache_size'});
9227 # Check if the current module should do caching
9228 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9229 # Caching all except some modules
9230 my @mods = split(/\s+/, $1);
9231 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9233 elsif ($gconfig{'cache_mods'}) {
9234 # Only caching some modules
9235 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9236 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9241 $cfile = "$main::http_cache_directory/$cfile";
9242 my @st = stat($cfile);
9243 return undef if (!@st || !$st[7]);
9244 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9249 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9254 =head2 supports_javascript
9256 Returns 1 if the current browser is assumed to support javascript.
9259 sub supports_javascript
9261 if (defined(&theme_supports_javascript)) {
9262 return &theme_supports_javascript();
9264 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9267 =head2 get_module_name
9269 Returns the name of the Webmin module that called this function. For internal
9270 use only by other API functions.
9275 return &get_module_variable('$module_name');
9278 =head2 get_module_variable(name, [ref])
9280 Returns the value of some variable which is set in the caller's context, if
9281 using the new WebminCore package. For internal use only.
9284 sub get_module_variable
9286 my ($v, $wantref) = @_;
9287 my $slash = $wantref ? "\\" : "";
9288 my $thispkg = &web_libs_package();
9289 if ($thispkg eq 'WebminCore') {
9290 my ($vt, $vn) = split('', $v, 2);
9292 for(my $i=0; ($callpkg) = caller($i); $i++) {
9293 last if ($callpkg ne $thispkg);
9295 return eval "${slash}${vt}${callpkg}::${vn}";
9297 return eval "${slash}${v}";
9300 =head2 clear_time_locale()
9302 Temporarily force the locale to C, until reset_time_locale is called. This is
9303 useful if your code is going to call C<strftime> from the POSIX package, and
9304 you want to ensure that the output is in a consistent format.
9307 sub clear_time_locale
9309 if ($main::clear_time_locale_count == 0) {
9312 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9313 POSIX::setlocale(POSIX::LC_TIME, "C");
9316 $main::clear_time_locale_count++;
9319 =head2 reset_time_locale()
9321 Revert the locale to whatever it was before clear_time_locale was called
9324 sub reset_time_locale
9326 if ($main::clear_time_locale_count == 1) {
9328 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9329 $main::clear_time_locale_old = undef;
9332 $main::clear_time_locale_count--;
9335 =head2 callers_package(filehandle)
9337 Convert a non-module filehandle like FOO to one qualified with the
9338 caller's caller's package, like fsdump::FOO. For internal use only.
9344 my $callpkg = (caller(1))[0];
9345 my $thispkg = &web_libs_package();
9346 if (!ref($fh) && $fh !~ /::/ &&
9347 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9348 $fh = $callpkg."::".$fh;
9353 =head2 web_libs_package()
9355 Returns the package this code is in. We can't always trust __PACKAGE__. For
9359 sub web_libs_package
9361 if ($called_from_webmin_core) {
9362 return "WebminCore";
9367 =head2 get_userdb_string
9369 Returns the URL-style string for connecting to the users and groups database
9372 sub get_userdb_string
9374 return undef if ($main::no_miniserv_userdb);
9376 &get_miniserv_config(\%miniserv);
9377 return $miniserv{'userdb'};
9380 =head2 connect_userdb(string)
9382 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9383 On failure returns an error message string. In an array context, returns the
9390 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9391 if ($proto eq "mysql") {
9392 # Connect to MySQL with DBI
9393 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9394 $drh || return $text{'sql_emysqldriver'};
9395 my ($host, $port) = split(/:/, $host);
9396 my $cstr = "database=$prefix;host=$host";
9397 $cstr .= ";port=$port" if ($port);
9398 my $dbh = $drh->connect($cstr, $user, $pass, { });
9399 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9400 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9402 elsif ($proto eq "postgresql") {
9403 # Connect to PostgreSQL with DBI
9404 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9405 $drh || return $text{'sql_epostgresqldriver'};
9406 my ($host, $port) = split(/:/, $host);
9407 my $cstr = "dbname=$prefix;host=$host";
9408 $cstr .= ";port=$port" if ($port);
9409 my $dbh = $drh->connect($cstr, $user, $pass);
9410 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9411 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9413 elsif ($proto eq "ldap") {
9414 # Connect with perl LDAP module
9415 eval "use Net::LDAP";
9416 $@ && return $text{'sql_eldapdriver'};
9417 my ($host, $port) = split(/:/, $host);
9418 my $scheme = $args->{'scheme'} || 'ldap';
9420 $port = $scheme eq 'ldaps' ? 636 : 389;
9422 my $ldap = Net::LDAP->new($host,
9424 'scheme' => $scheme);
9425 $ldap || return &text('sql_eldapconnect', $host);
9427 if ($args->{'tls'}) {
9428 # Switch to TLS mode
9429 eval { $mesg = $ldap->start_tls(); };
9430 if ($@ || !$mesg || $mesg->code) {
9431 return &text('sql_eldaptls',
9432 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9435 # Login to the server
9437 $mesg = $ldap->bind(dn => $user, password => $pass);
9440 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9442 if (!$mesg || $mesg->code) {
9443 return &text('sql_eldaplogin', $user,
9444 $mesg ? $mesg->error : "Unknown error");
9446 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9449 return "Unknown protocol $proto";
9453 =head2 disconnect_userdb(string, &handle)
9455 Closes a handle opened by connect_userdb
9458 sub disconnect_userdb
9461 if ($str =~ /^(mysql|postgresql):/) {
9463 if (!$h->{'AutoCommit'}) {
9468 elsif ($str =~ /^ldap:/) {
9475 =head2 split_userdb_string(string)
9477 Converts a string like mysql://user:pass@host/db into separate parts
9480 sub split_userdb_string
9483 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9484 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9485 ($1, $2, $3, $4, $5, $7);
9486 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9487 return ($proto, $user, $pass, $host, $prefix, \%args);
9492 $done_web_lib_funcs = 1;