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 write_file(file, &hash, [join-char])
111 Write out the contents of a hash as name=value lines. The parameters are :
113 =item file - Full path to write to
115 =item hash - A hash reference containing names and values to output
117 =item join-char - If given, names and values are separated by this instead of =
123 my $join = defined($_[2]) ? $_[2] : "=";
124 my $realfile = &translate_filename($_[0]);
125 &read_file($_[0], \%old, \@order);
126 &open_tempfile(ARFILE, ">$_[0]");
127 foreach $k (@order) {
128 if (exists($_[1]->{$k})) {
129 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
130 &error(&text("efilewrite", $realfile, $!));
133 foreach $k (keys %{$_[1]}) {
134 if (!exists($old{$k})) {
135 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
136 &error(&text("efilewrite", $realfile, $!));
139 &close_tempfile(ARFILE);
140 if (defined($main::read_file_cache{$realfile})) {
141 %{$main::read_file_cache{$realfile}} = %{$_[1]};
143 if (defined($main::read_file_missing{$realfile})) {
144 $main::read_file_missing{$realfile} = 0;
148 =head2 html_escape(string)
150 Converts &, < and > codes in text to HTML entities, and returns the new string.
151 This should be used when including data read from other sources in HTML pages.
160 $tmp =~ s/\"/"/g;
161 $tmp =~ s/\'/'/g;
166 =head2 quote_escape(string, [only-quote])
168 Converts ' and " characters in a string into HTML entities, and returns it.
169 Useful for outputing HTML tag values.
174 my ($tmp, $only) = @_;
175 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
176 # convert &, unless it is part of &#nnn; or &foo;
177 $tmp =~ s/&([^#])/&$1/g;
179 $tmp =~ s/&$/&/g;
180 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
181 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
185 =head2 tempname([filename])
187 Returns a mostly random temporary file name, typically under the /tmp/.webmin
188 directory. If filename is given, this will be the base name used. Otherwise
189 a unique name is selected randomly.
194 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
195 $gconfig{'tempdir_'.&get_module_name()} :
196 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
197 $ENV{'TEMP'} ? $ENV{'TEMP'} :
198 $ENV{'TMP'} ? $ENV{'TMP'} :
199 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
200 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
201 "$remote_user_info[7]/.tmp" :
202 @remote_user_info ? $tmp_base."-".$remote_user :
203 $< != 0 ? $tmp_base."-".getpwuid($<) :
205 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
206 # On Windows system, just create temp dir if missing
208 mkdir($tmp_dir, 0755) ||
209 &error("Failed to create temp directory $tmp_dir : $!");
213 # On Unix systems, need to make sure temp dir is valid
215 while($tries++ < 10) {
216 my @st = lstat($tmp_dir);
217 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
219 unlink($tmp_dir) || rmdir($tmp_dir) ||
220 system("/bin/rm -rf ".quotemeta($tmp_dir));
222 mkdir($tmp_dir, 0755) || next;
223 chown($<, $(, $tmp_dir);
224 chmod(0755, $tmp_dir);
227 my @st = lstat($tmp_dir);
228 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
232 if (defined($_[0]) && $_[0] !~ /\.\./) {
233 $rv = "$tmp_dir/$_[0]";
236 $main::tempfilecount++;
238 $rv = $tmp_dir."/".int(rand(1000000))."_".
239 $main::tempfilecount."_".$scriptname;
244 =head2 transname([filename])
246 Behaves exactly like tempname, but records the temp file for deletion when the
247 current Webmin script process exits.
252 my $rv = &tempname(@_);
253 push(@main::temporary_files, $rv);
257 =head2 trunc(string, maxlen)
259 Truncates a string to the shortest whole word less than or equal to the
260 given width. Useful for word wrapping.
265 if (length($_[0]) <= $_[1]) {
268 my $str = substr($_[0],0,$_[1]);
277 =head2 indexof(string, value, ...)
279 Returns the index of some value in an array of values, or -1 if it was not
285 for(my $i=1; $i <= $#_; $i++) {
286 if ($_[$i] eq $_[0]) { return $i - 1; }
291 =head2 indexoflc(string, value, ...)
293 Like indexof, but does a case-insensitive match
298 my $str = lc(shift(@_));
299 my @arr = map { lc($_) } @_;
300 return &indexof($str, @arr);
303 =head2 sysprint(handle, [string]+)
305 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
306 as a replacement for print when writing to pipes or sockets.
311 my $fh = &callers_package($_[0]);
312 my $str = join('', @_[1..$#_]);
313 syswrite $fh, $str, length($str);
316 =head2 check_ipaddress(ip)
318 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
323 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
324 $1 >= 0 && $1 <= 255 &&
325 $2 >= 0 && $2 <= 255 &&
326 $3 >= 0 && $3 <= 255 &&
327 $4 >= 0 && $4 <= 255;
330 =head2 check_ip6address(ip)
332 Check if some IPv6 address is properly formatted, and returns 1 if so.
337 my @blocks = split(/:/, $_[0]);
338 return 0 if (@blocks == 0 || @blocks > 8);
340 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
341 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
342 # value is in [0;128].
344 my $where = index($blocks[$ib],"/");
347 my $b = substr($blocks[$ib],0,$where);
348 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
352 # The netmask must take its value in [0;128]
353 return 0 if ($m <0 || $m >128);
355 # Check the different blocks of the address : 16 bits block in hexa notation.
356 # Possibility of 1 empty block or 2 if the address begins with "::".
359 foreach $b (@blocks) {
360 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
361 $empty++ if ($b eq "");
363 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
369 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
371 Prints HTML for an icon image. The parameters are :
373 =item image - URL for the image, like images/foo.gif
375 =item title - Text to appear under the icon
377 =item link - Optional destination for the icon's link
379 =item href - Other HTML attributes to be added to the <a href> for the link
381 =item width - Optional width of the icon
383 =item height - Optional height of the icon
385 =item before-title - HTML to appear before the title link, but which is not actually in the link
387 =item after-title - HTML to appear after the title link, but which is not actually in the link
392 &load_theme_library();
393 if (defined(&theme_generate_icon)) {
394 &theme_generate_icon(@_);
397 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
398 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
399 if ($tconfig{'noicons'}) {
401 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
404 print "$_[6]$_[1]$_[7]\n";
408 print "<table border><tr><td width=48 height=48>\n",
409 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
410 "$w $h></a></td></tr></table>\n";
411 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
414 print "<table border><tr><td width=48 height=48>\n",
415 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
416 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
422 Converts a string to a form ok for putting in a URL, using % escaping.
428 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
432 =head2 un_urlize(string)
434 Converts a URL-encoded string to it's original contents - the reverse of the
442 $rv =~ s/%(..)/pack("c",hex($1))/ge;
446 =head2 include(filename)
448 Read and output the contents of the given file.
454 open(INCLUDE, &translate_filename($_[0])) || return 0;
462 =head2 copydata(in-handle, out-handle)
464 Read from one file handle and write to another, until there is no more to read.
470 $in = &callers_package($in);
471 $out = &callers_package($out);
473 while(read($in, $buf, 1024) > 0) {
474 (print $out $buf) || return 0;
479 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
481 Read data submitted via a POST request using the multipart/form-data coding,
482 and store it in the global %in hash. The optional parameters are :
484 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
486 =item cbfunc - A function reference to call after reading each block of data.
488 =item cbargs - Additional parameters to the callback function.
493 my ($max, $cbfunc, $cbargs) = @_;
494 my ($boundary, $line, $foo, $name, $got, $file);
495 my $err = &text('readparse_max', $max);
496 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
497 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
500 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
502 <STDIN>; # skip first boundary
505 # Read section headers
509 $got += length($line);
510 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
511 if ($max && $got > $max) {
516 if ($line =~ /^(\S+):\s*(.*)$/) {
517 $header{$lastheader = lc($1)} = $2;
519 elsif ($line =~ /^\s+(.*)$/) {
520 $header{$lastheader} .= $line;
524 # Parse out filename and type
525 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
527 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
532 $foo = $name . "_$1";
539 &error($text{'readparse_cdheader'});
541 if ($header{'content-type'} =~ /^([^\s;]+)/) {
542 $foo = $name . "_content_type";
545 $file = $in{$name."_filename"};
548 $in{$name} .= "\0" if (defined($in{$name}));
551 $got += length($line);
552 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
554 if ($max && $got > $max) {
555 #print STDERR "over limit of $max\n";
560 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
565 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
566 if (index($line, $boundary) != -1) { last; }
569 chop($in{$name}); chop($in{$name});
570 if (index($line,"$boundary--") != -1) { last; }
572 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
575 =head2 ReadParse([&hash], [method], [noplus])
577 Fills the given hash reference with CGI parameters, or uses the global hash
578 %in if none is given. Also sets the global variables $in and @in. The other
581 =item method - For use of this HTTP method, such as GET
583 =item noplus - Don't convert + in parameters to spaces.
588 my $a = $_[0] || \%in;
590 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
592 if ($meth eq 'POST') {
593 my $clen = $ENV{'CONTENT_LENGTH'};
594 &read_fully(STDIN, \$in, $clen) == $clen ||
595 &error("Failed to read POST input : $!");
597 if ($ENV{'QUERY_STRING'}) {
598 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
599 else { $in = $ENV{'QUERY_STRING'}; }
601 @in = split(/\&/, $in);
602 foreach my $i (@in) {
603 my ($k, $v) = split(/=/, $i, 2);
608 $k =~ s/%(..)/pack("c",hex($1))/ge;
609 $v =~ s/%(..)/pack("c",hex($1))/ge;
610 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
614 =head2 read_fully(fh, &buffer, length)
616 Read data from some file handle up to the given length, even in the face
617 of partial reads. Reads the number of bytes read. Stores received data in the
618 string pointed to be the buffer reference.
623 my ($fh, $buf, $len) = @_;
624 $fh = &callers_package($fh);
627 my $r = read(STDIN, $$buf, $len-$got, $got);
634 =head2 read_parse_mime_callback(size, totalsize, upload-id)
636 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
637 the file on every 1% change though. For internal use by the upload progress
641 sub read_parse_mime_callback
643 my ($size, $totalsize, $filename, $id) = @_;
644 return if ($gconfig{'no_upload_tracker'});
647 # Create the upload tracking directory - if running as non-root, this has to
648 # be under the user's home
651 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
652 $vardir = "$uinfo[7]/.tmp";
655 $vardir = $ENV{'WEBMIN_VAR'};
658 &make_dir($vardir, 0755);
661 # Remove any upload.* files more than 1 hour old
662 if (!$main::read_parse_mime_callback_flushed) {
664 opendir(UPDIR, $vardir);
665 foreach my $f (readdir(UPDIR)) {
666 next if ($f !~ /^upload\./);
667 my @st = stat("$vardir/$f");
668 if ($st[9] < $now-3600) {
669 unlink("$vardir/$f");
673 $main::read_parse_mime_callback_flushed++;
676 # Only update file once per percent
677 my $upfile = "$vardir/upload.$id";
678 if ($totalsize && $size >= 0) {
679 my $pc = int(100 * $size / $totalsize);
680 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
683 $main::read_parse_mime_callback_pc{$upfile} = $pc;
687 &open_tempfile(UPFILE, ">$upfile");
688 print UPFILE $size,"\n";
689 print UPFILE $totalsize,"\n";
690 print UPFILE $filename,"\n";
691 &close_tempfile(UPFILE);
694 =head2 read_parse_mime_javascript(upload-id, [&fields])
696 Returns an onSubmit= Javascript statement to popup a window for tracking
697 an upload with the given ID. For internal use by the upload progress tracker.
700 sub read_parse_mime_javascript
702 my ($id, $fields) = @_;
703 return "" if ($gconfig{'no_upload_tracker'});
704 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
706 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
707 return "onSubmit='if ($if) { $opener }'";
710 return "onSubmit='$opener'";
714 =head2 PrintHeader(charset)
716 Outputs the HTTP headers for an HTML page. The optional charset parameter
717 can be used to set a character set. Normally this function is not called
718 directly, but is rather called by ui_print_header or header.
723 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
724 print "pragma: no-cache\n";
725 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
726 print "Cache-Control: no-store, no-cache, must-revalidate\n";
727 print "Cache-Control: post-check=0, pre-check=0\n";
729 if (defined($_[0])) {
730 print "Content-type: text/html; Charset=$_[0]\n\n";
733 print "Content-type: text/html\n\n";
737 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
739 Outputs a Webmin HTML page header with a title, including HTTP headers. The
742 =item title - The text to show at the top of the page
744 =item image - An image to show instead of the title text. This is typically left blank.
746 =item help - If set, this is the name of a help page that will be linked to in the title.
748 =item config - If set to 1, the title will contain a link to the module's config page.
750 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
752 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
754 =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.
756 =item head-stuff - HTML to be included in the <head> section of the page.
758 =item body-stuff - HTML attributes to be include in the <body> tag.
760 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
765 return if ($main::done_webmin_header++);
767 my $charset = defined($main::force_charset) ? $main::force_charset
769 &PrintHeader($charset);
770 &load_theme_library();
771 if (defined(&theme_header)) {
772 $module_name = &get_module_name();
774 $miniserv::page_capture = 1;
777 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
780 if (defined(&theme_prehead)) {
784 print "<meta http-equiv=\"Content-Type\" ",
785 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
788 my $title = &get_html_title($_[0]);
789 print "<title>$title</title>\n";
790 print $_[7] if ($_[7]);
791 print &get_html_status_line(0);
793 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
794 if ($tconfig{'headinclude'}) {
795 print &read_file_contents(
796 "$theme_root_directory/$tconfig{'headinclude'}");
799 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
800 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
801 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
802 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
803 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
804 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
805 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
807 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
809 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
810 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
811 if (defined(&theme_prebody)) {
814 my $hostname = &get_display_hostname();
815 my $version = &get_webmin_version();
816 my $prebody = $tconfig{'prebody'};
818 $prebody =~ s/%HOSTNAME%/$hostname/g;
819 $prebody =~ s/%VERSION%/$version/g;
820 $prebody =~ s/%USER%/$remote_user/g;
821 $prebody =~ s/%OS%/$os_type $os_version/g;
824 if ($tconfig{'prebodyinclude'}) {
826 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
833 print $tconfig{'preheader'};
834 my %this_module_info = &get_module_info(&get_module_name());
835 print "<table class='header' width=100%><tr>\n";
836 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
837 print "<td id='headln1' colspan=3 align=center>\n";
838 print &get_html_status_line(1);
839 print "</td></tr> <tr>\n";
841 print "<td id='headln2l' width=15% valign=top align=left>";
842 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
843 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
844 "$text{'header_servers'}</a><br>\n";
846 if (!$_[5] && !$tconfig{'noindex'}) {
847 my @avail = &get_available_module_infos(1);
848 my $nolo = $ENV{'ANONYMOUS_USER'} ||
849 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
850 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
851 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
853 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
854 "$text{'main_logout'}</a><br>";
856 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
857 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
858 "$text{'main_switch'}</a><br>";
860 elsif (!$gconfig{'gotoone'} || @avail > 1) {
861 print "<a href='$gconfig{'webprefix'}/?cat=",
862 $this_module_info{'category'},
863 "'>$text{'header_webmin'}</a><br>\n";
866 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
867 my $idx = $this_module_info{'index_link'};
868 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
869 my $mt = $module_index_name || $text{'header_module'};
870 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
872 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
873 !$tconfig{'nohelp'}) {
874 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
877 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
878 !$tconfig{'nohelp'}) {
879 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
882 my %access = &get_module_acl();
883 if (!$access{'noconfig'} && !$config{'noprefs'}) {
884 my $cprog = $user_module_config_directory ?
885 "uconfig.cgi" : "config.cgi";
886 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
887 &get_module_name()."\">",
888 $text{'header_config'},"</a><br>\n";
893 # Title is a single image
894 print "<td id='headln2c' align=center width=70%>",
895 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
899 my $ts = defined($tconfig{'titlesize'}) ?
900 $tconfig{'titlesize'} : "+2";
901 print "<td id='headln2c' align=center width=70%>",
902 ($ts ? "<font size=$ts>" : ""),$_[0],
903 ($ts ? "</font>" : "");
904 print "<br>$_[9]\n" if ($_[9]);
907 print "<td id='headln2r' width=15% valign=top align=right>";
909 print "</td></tr></table>\n";
910 print $tconfig{'postheader'};
912 $miniserv::page_capture = 1;
915 =head2 get_html_title(title)
917 Returns the full string to appear in the HTML <title> block.
924 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
925 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
926 my $host = &get_display_hostname();
927 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
928 $title = sprintf "%s : %s on %s (%s %s)\n",
929 $msg, $remote_user, $host,
930 $os_type, $os_version;
932 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
933 $title = sprintf "%s on %s (%s %s)\n",
935 $os_type, $os_version;
940 if ($gconfig{'showlogin'} && $remote_user) {
941 $title = $remote_user.($title ? " : ".$title : "");
943 if ($gconfig{'showhost'}) {
944 $title = $host.($title ? " : ".$title : "");
949 =head2 get_html_framed_title
951 Returns the title text for a framed theme main page.
954 sub get_html_framed_title
957 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
958 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
960 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
961 # Alternate title mode requested
962 $title = sprintf "%s on %s (%s %s)\n",
963 $remote_user, &get_display_hostname(),
964 $os_type, $os_version;
967 # Title like 'Webmin x.yy on hostname (Linux 6)'
968 if ($os_version eq "*") {
972 $ostr = "$os_type $os_version";
974 my $host = &get_display_hostname();
975 my $ver = &get_webmin_version();
976 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
977 $gconfig{'showhost'} ? &text('main_title3', $ver, $ostr) :
978 &text('main_title', $ver, $host, $ostr);
979 if ($gconfig{'showlogin'}) {
980 $title = $remote_user.($title ? " : ".$title : "");
982 if ($gconfig{'showhost'}) {
983 $title = $host.($title ? " : ".$title : "");
989 =head2 get_html_status_line(text-only)
991 Returns HTML for a script block that sets the status line, or if text-only
992 is set to 1, just return the status line text.
995 sub get_html_status_line
998 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
999 # Disabled in this mode
1002 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
1003 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
1004 my $line = &text('header_statusmsg',
1005 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
1007 ($ENV{'SSL_USER'} ? " (SSL certified)" :
1008 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1009 $text{'programname'},
1010 &get_webmin_version(),
1011 &get_display_hostname(),
1012 $os_type.($os_version eq "*" ? "" :" $os_version"));
1017 $line =~ s/\r|\n//g;
1018 return "<script language=JavaScript type=text/javascript>\n".
1019 "defaultStatus=\""."e_escape($line)."\";\n".
1024 =head2 popup_header([title], [head-stuff], [body-stuff], [no-body])
1026 Outputs a page header, suitable for a popup window. If no title is given,
1027 absolutely no decorations are output. Also useful in framesets. The parameters
1030 =item title - Title text for the popup window.
1032 =item head-stuff - HTML to appear in the <head> section.
1034 =item body-stuff - HTML attributes to be include in the <body> tag.
1036 =item no-body - If set to 1, don't generate a body tag
1041 return if ($main::done_webmin_header++);
1043 my $charset = defined($main::force_charset) ? $main::force_charset
1045 &PrintHeader($charset);
1046 &load_theme_library();
1047 if (defined(&theme_popup_header)) {
1048 &theme_popup_header(@_);
1049 $miniserv::page_capture = 1;
1052 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1055 if (defined(&theme_popup_prehead)) {
1056 &theme_popup_prehead(@_);
1058 print "<title>$_[0]</title>\n";
1060 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1061 if ($tconfig{'headinclude'}) {
1062 print &read_file_contents(
1063 "$theme_root_directory/$tconfig{'headinclude'}");
1066 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1067 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1068 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1069 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1070 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1071 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1072 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1075 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1076 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1077 if (defined(&theme_popup_prebody)) {
1078 &theme_popup_prebody(@_);
1081 $miniserv::page_capture = 1;
1084 =head2 footer([page, name]+, [noendbody])
1086 Outputs the footer for a Webmin HTML page, possibly with links back to other
1087 pages. The links are specified by pairs of parameters, the first of which is
1088 a link destination, and the second the link text. For example :
1090 footer('/', 'Webmin index', '', 'Module menu');
1095 $miniserv::page_capture = 0;
1096 &load_theme_library();
1097 my %this_module_info = &get_module_info(&get_module_name());
1098 if (defined(&theme_footer)) {
1099 $module_name = &get_module_name(); # Old themes use these
1100 %module_info = %this_module_info;
1104 for(my $i=0; $i+1<@_; $i+=2) {
1106 if ($url ne '/' || !$tconfig{'noindex'}) {
1108 $url = "/?cat=$this_module_info{'category'}";
1110 elsif ($url eq '' && &get_module_name()) {
1111 $url = "/".&get_module_name()."/".
1112 $this_module_info{'index_link'};
1114 elsif ($url =~ /^\?/ && &get_module_name()) {
1115 $url = "/".&get_module_name()."/$url";
1117 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1119 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1124 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1129 my $postbody = $tconfig{'postbody'};
1131 my $hostname = &get_display_hostname();
1132 my $version = &get_webmin_version();
1133 my $os_type = $gconfig{'real_os_type'} ||
1134 $gconfig{'os_type'};
1135 my $os_version = $gconfig{'real_os_version'} ||
1136 $gconfig{'os_version'};
1137 $postbody =~ s/%HOSTNAME%/$hostname/g;
1138 $postbody =~ s/%VERSION%/$version/g;
1139 $postbody =~ s/%USER%/$remote_user/g;
1140 $postbody =~ s/%OS%/$os_type $os_version/g;
1141 print "$postbody\n";
1143 if ($tconfig{'postbodyinclude'}) {
1145 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1151 if (defined(&theme_postbody)) {
1152 &theme_postbody(@_);
1154 print "</body></html>\n";
1158 =head2 popup_footer([no-body])
1160 Outputs html for a footer for a popup window, started by popup_header.
1165 $miniserv::page_capture = 0;
1166 &load_theme_library();
1167 if (defined(&theme_popup_footer)) {
1168 &theme_popup_footer(@_);
1177 =head2 load_theme_library
1179 Immediately loads the current theme's theme.pl file. Not generally useful for
1180 most module developers, as this is called automatically by the header function.
1183 sub load_theme_library
1185 return if (!$current_theme || $loaded_theme_library++);
1186 for(my $i=0; $i<@theme_root_directories; $i++) {
1187 if ($theme_configs[$i]->{'functions'}) {
1188 do $theme_root_directories[$i]."/".
1189 $theme_configs[$i]->{'functions'};
1194 =head2 redirect(url)
1196 Output HTTP headers to redirect the browser to some page. The url parameter is
1197 typically a relative URL like index.cgi or list_users.cgi.
1202 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1203 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1204 ":$ENV{'SERVER_PORT'}";
1205 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1206 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1208 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1209 # Absolute URL (like http://...)
1212 elsif ($_[0] =~ /^\//) {
1213 # Absolute path (like /foo/bar.cgi)
1214 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1216 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1217 # Relative URL (like foo.cgi)
1218 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1221 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1223 &load_theme_library();
1224 if (defined(&theme_redirect)) {
1225 $module_name = &get_module_name(); # Old themes use these
1226 %module_info = &get_module_info($module_name);
1227 &theme_redirect($_[0], $url);
1230 print "Location: $url\n\n";
1234 =head2 kill_byname(name, signal)
1236 Finds a process whose command line contains the given name (such as httpd), and
1237 sends some signal to it. The signal can be numeric (like 9) or named
1243 my @pids = &find_byname($_[0]);
1244 return scalar(@pids) if (&is_readonly_mode());
1245 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1246 if ($gconfig{'debug_what_procs'});
1247 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1251 =head2 kill_byname_logged(name, signal)
1253 Like kill_byname, but also logs the killing.
1256 sub kill_byname_logged
1258 my @pids = &find_byname($_[0]);
1259 return scalar(@pids) if (&is_readonly_mode());
1260 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1264 =head2 find_byname(name)
1266 Finds processes searching for the given name in their command lines, and
1267 returns a list of matching PIDs.
1272 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1273 # Linux with /proc filesystem .. use cmdline files, as this is
1274 # faster than forking
1276 opendir(PROCDIR, "/proc");
1277 foreach my $f (readdir(PROCDIR)) {
1278 if ($f eq int($f) && $f != $$) {
1279 my $line = &read_file_contents("/proc/$f/cmdline");
1280 if ($line =~ /$_[0]/) {
1289 if (&foreign_check("proc")) {
1290 # Call the proc module
1291 &foreign_require("proc", "proc-lib.pl");
1292 if (defined(&proc::list_processes)) {
1293 my @procs = &proc::list_processes();
1295 foreach my $p (@procs) {
1296 if ($p->{'args'} =~ /$_[0]/) {
1297 push(@pids, $p->{'pid'});
1300 @pids = grep { $_ != $$ } @pids;
1305 # Fall back to running a command
1307 $cmd = $gconfig{'find_pid_command'};
1308 $cmd =~ s/NAME/"$_[0]"/g;
1309 $cmd = &translate_command($cmd);
1310 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1311 @pids = grep { $_ != $$ } @pids;
1315 =head2 error([message]+)
1317 Display an error message and exit. This should be used by CGI scripts that
1318 encounter a fatal error or invalid user input to notify users of the problem.
1319 If error_setup has been called, the displayed error message will be prefixed
1320 by the message setup using that function.
1325 $main::no_miniserv_userdb = 1;
1326 my $msg = join("", @_);
1327 $msg =~ s/<[^>]*>//g;
1328 if (!$main::error_must_die) {
1329 print STDERR "Error: ",$msg,"\n";
1331 &load_theme_library();
1332 if ($main::error_must_die) {
1333 if ($gconfig{'error_stack'}) {
1334 print STDERR "Error: ",$msg,"\n";
1335 for(my $i=0; my @stack = caller($i); $i++) {
1336 print STDERR "File: $stack[1] Line: $stack[2] ",
1337 "Function: $stack[3]\n";
1342 elsif (!$ENV{'REQUEST_METHOD'}) {
1343 # Show text-only error
1344 print STDERR "$text{'error'}\n";
1345 print STDERR "-----\n";
1346 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1348 print STDERR "-----\n";
1349 if ($gconfig{'error_stack'}) {
1351 print STDERR $text{'error_stack'},"\n";
1352 for(my $i=0; my @stack = caller($i); $i++) {
1353 print STDERR &text('error_stackline',
1354 $stack[1], $stack[2], $stack[3]),"\n";
1359 elsif (defined(&theme_error)) {
1363 &header($text{'error'}, "");
1365 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1367 if ($gconfig{'error_stack'}) {
1369 print "<h3>$text{'error_stack'}</h3>\n";
1371 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1372 "<td><b>$text{'error_line'}</b></td> ",
1373 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1374 for($i=0; my @stack = caller($i); $i++) {
1376 print "<td>$stack[1]</td>\n";
1377 print "<td>$stack[2]</td>\n";
1378 print "<td>$stack[3]</td>\n";
1384 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1385 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1391 &unlock_all_files();
1392 &cleanup_tempnames();
1396 =head2 popup_error([message]+)
1398 This function is almost identical to error, but displays the message with HTML
1399 headers suitable for a popup window.
1404 $main::no_miniserv_userdb = 1;
1405 &load_theme_library();
1406 if ($main::error_must_die) {
1409 elsif (defined(&theme_popup_error)) {
1410 &theme_popup_error(@_);
1413 &popup_header($text{'error'}, "");
1414 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1417 &unlock_all_files();
1418 &cleanup_tempnames();
1422 =head2 error_setup(message)
1424 Registers a message to be prepended to all error messages displayed by the
1430 $main::whatfailed = $_[0];
1433 =head2 wait_for(handle, regexp, regexp, ...)
1435 Reads from the input stream until one of the regexps matches, and returns the
1436 index of the matching regexp, or -1 if input ended before any matched. This is
1437 very useful for parsing the output of interactive programs, and can be used with
1438 a two-way pipe to feed input to a program in response to output matched by
1441 If the matching regexp contains bracketed sub-expressions, their values will
1442 be placed in the global array @matches, indexed starting from 1. You cannot
1443 use the Perl variables $1, $2 and so on to capture matches.
1447 $rv = wait_for($loginfh, "username:");
1449 error("Didn't get username prompt");
1451 print $loginfh "joe\n";
1452 $rv = wait_for($loginfh, "password:");
1454 error("Didn't get password prompt");
1456 print $loginfh "smeg\n";
1461 my ($c, $i, $sw, $rv, $ha);
1462 undef($wait_for_input);
1463 if ($wait_for_debug) {
1464 print STDERR "wait_for(",join(",", @_),")\n";
1466 $ha = &callers_package($_[0]);
1467 if ($wait_for_debug) {
1468 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1473 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1474 " \$wait_for_input .= \$c;\n";
1475 if ($wait_for_debug) {
1476 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1478 for($i=1; $i<@_; $i++) {
1479 $sw = $i>1 ? "elsif" : "if";
1480 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1483 " if (defined(\$hit)) {\n".
1484 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1490 &error("wait_for error : $@\n");
1495 =head2 fast_wait_for(handle, string, string, ...)
1497 This function behaves very similar to wait_for (documented above), but instead
1498 of taking regular expressions as parameters, it takes strings. As soon as the
1499 input contains one of them, it will return the index of the matching string.
1500 If the input ends before any match, it returns -1.
1505 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1506 for($i=1; $i<@_; $i++) {
1507 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1511 if (($c = getc($ha)) eq "") {
1512 &error("fast_wait_for read error : $!");
1515 if (length($inp) > $maxlen) {
1516 $inp = substr($inp, length($inp)-$maxlen);
1518 $inpl = length($inp);
1519 for($i=1; $i<@_; $i++) {
1520 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1527 =head2 has_command(command)
1529 Returns the full path to the executable if some command is in the path, or
1530 undef if not found. If the given command is already an absolute path and
1531 exists, then the same path will be returned.
1536 if (!$_[0]) { return undef; }
1537 if (exists($main::has_command_cache{$_[0]})) {
1538 return $main::has_command_cache{$_[0]};
1541 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1542 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1543 # Absolute path given - just use it
1544 my $t = &translate_filename($_[0]);
1545 $rv = (-x $t && !-d _) ? $_[0] : undef;
1548 # Check each directory in the path
1550 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1551 next if ($donedir{$d}++);
1552 $d =~ s/$slash$// if ($d ne $slash);
1553 my $t = &translate_filename("$d/$_[0]");
1554 if (-x $t && !-d _) {
1555 $rv = $d.$slash.$_[0];
1558 if ($gconfig{'os_type'} eq 'windows') {
1559 foreach my $sfx (".exe", ".com", ".bat") {
1560 my $t = &translate_filename("$d/$_[0]").$sfx;
1561 if (-r $t && !-d _) {
1562 $rv = $d.$slash.$_[0].$sfx;
1569 $main::has_command_cache{$_[0]} = $rv;
1573 =head2 make_date(seconds, [date-only], [fmt])
1575 Converts a Unix date/time in seconds to a human-readable form, by default
1576 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1578 =item seconds - Unix time is seconds to convert.
1580 =item date-only - If set to 1, exclude the time from the returned string.
1582 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1587 my ($secs, $only, $fmt) = @_;
1588 my @tm = localtime($secs);
1591 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1593 if ($fmt eq 'dd/mon/yyyy') {
1594 $date = sprintf "%2.2d/%s/%4.4d",
1595 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1597 elsif ($fmt eq 'dd/mm/yyyy') {
1598 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1600 elsif ($fmt eq 'mm/dd/yyyy') {
1601 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1603 elsif ($fmt eq 'yyyy/mm/dd') {
1604 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1606 elsif ($fmt eq 'd. mon yyyy') {
1607 $date = sprintf "%d. %s %4.4d",
1608 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1610 elsif ($fmt eq 'dd.mm.yyyy') {
1611 $date = sprintf "%2.2d.%2.2d.%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1613 elsif ($fmt eq 'yyyy-mm-dd') {
1614 $date = sprintf "%4.4d-%2.2d-%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1617 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1622 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1624 Return HTML for a button that pops up a file chooser when clicked, and places
1625 the selected filename into another HTML field. The parameters are :
1627 =item input - Name of the form field to store the filename in.
1629 =item type - 0 for file or directory chooser, or 1 for directory only.
1631 =item form - Index of the form containing the button.
1633 =item chroot - If set to 1, the chooser will be limited to this directory.
1635 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1638 sub file_chooser_button
1640 return &theme_file_chooser_button(@_)
1641 if (defined(&theme_file_chooser_button));
1642 my $form = defined($_[2]) ? $_[2] : 0;
1643 my $chroot = defined($_[3]) ? $_[3] : "/";
1644 my $add = int($_[4]);
1645 my ($w, $h) = (400, 300);
1646 if ($gconfig{'db_sizefile'}) {
1647 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1649 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";
1652 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1654 Returns HTML for a button that will popup a chooser window of some kind. The
1657 =item url - Base URL of the popup window's contents
1659 =item width - Width of the window in pixels
1661 =item height - Height in pixels
1663 =item scrollbars - Set to 1 if the window should have scrollbars
1665 The field-mappings parameter is an array ref of array refs containing
1667 =item - Attribute to assign field to in the popup window
1669 =item - Form field name
1671 =item - CGI parameter to URL for value, if any
1674 sub popup_window_button
1676 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1677 my ($url, $w, $h, $scroll, $fields) = @_;
1678 my $scrollyn = $scroll ? "yes" : "no";
1679 my $rv = "<input type=button onClick='";
1680 foreach my $m (@$fields) {
1681 $rv .= "$m->[0] = form.$m->[1]; ";
1683 my $sep = $url =~ /\?/ ? "&" : "?";
1684 $rv .= "chooser = window.open(\"$url\"";
1685 foreach my $m (@$fields) {
1687 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1691 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1692 foreach my $m (@$fields) {
1693 $rv .= "chooser.$m->[0] = $m->[0]; ";
1694 $rv .= "window.$m->[0] = $m->[0]; ";
1696 $rv .= "' value=\"...\">";
1700 =head2 read_acl(&user-module-hash, &user-list-hash, [&only-users])
1702 Reads the Webmin acl file into the given hash references. The first is indexed
1703 by a combined key of username,module , with the value being set to 1 when
1704 the user has access to that module. The second is indexed by username, with
1705 the value being an array ref of allowed modules.
1707 This function is deprecated in favour of foreign_available, which performs a
1708 more comprehensive check of module availability.
1710 If the only-users array ref parameter is given, the results may be limited to
1711 users in that list of names.
1716 my ($usermod, $userlist, $only) = @_;
1717 if (!%main::acl_hash_cache) {
1718 # Read from local files
1720 open(ACL, &acl_filename());
1722 if (/^([^:]+):\s*(.*)/) {
1724 my @mods = split(/\s+/, $2);
1725 foreach my $m (@mods) {
1726 $main::acl_hash_cache{$user,$m}++;
1728 $main::acl_array_cache{$user} = \@mods;
1733 %$usermod = %main::acl_hash_cache if ($usermod);
1734 %$userlist = %main::acl_array_cache if ($userlist);
1737 my $userdb = &get_userdb_string();
1738 my ($dbh, $proto, $prefix, $args) =
1739 $userdb ? &connect_userdb($userdb) : ( );
1741 if ($proto eq "mysql" || $proto eq "postgresql") {
1742 # Select usernames and modules from SQL DB
1743 my $cmd = $dbh->prepare(
1744 "select webmin_user.name,webmin_user_attr.value ".
1745 "from webmin_user,webmin_user_attr ".
1746 "where webmin_user.id = webmin_user_attr.id ".
1747 "and webmin_user_attr.attr = 'modules' ".
1748 ($only ? " and webmin_user.name in (".
1749 join(",", map { "'$_'" } @$only).")" : ""));
1750 if ($cmd && $cmd->execute()) {
1751 while(my ($user, $mods) = $cmd->fetchrow()) {
1752 my @mods = split(/\s+/, $mods);
1753 foreach my $m (@mods) {
1754 $usermod->{$user,$m}++ if ($usermod);
1756 $userlist->{$user} = \@mods if ($userlist);
1759 $cmd->finish() if ($cmd);
1761 elsif ($proto eq "ldap") {
1762 # Find users in LDAP
1763 my $filter = '(objectClass='.$args->{'userclass'}.')';
1766 "(|".join("", map { "(cn=$_)" } @$only).")";
1767 $filter = "(&".$filter.$ufilter.")";
1769 my $rv = $dbh->search(
1773 attrs => [ 'cn', 'webminModule' ]);
1774 if ($rv && !$rv->code) {
1775 foreach my $u ($rv->all_entries) {
1776 my $user = $u->get_value('cn');
1777 my @mods =$u->get_value('webminModule');
1778 foreach my $m (@mods) {
1779 $usermod->{$user,$m}++ if ($usermod);
1781 $userlist->{$user} = \@mods if ($userlist);
1785 &disconnect_userdb($userdb, $dbh);
1791 Returns the file containing the webmin ACL, which is usually
1792 /etc/webmin/webmin.acl.
1797 return "$config_directory/webmin.acl";
1802 Does nothing, but kept around for compatability.
1809 =head2 get_miniserv_config(&hash)
1811 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1812 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1816 sub get_miniserv_config
1818 return &read_file_cached(
1819 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1822 =head2 put_miniserv_config(&hash)
1824 Writes out the Webmin webserver configuration file from the contents of
1825 the given hash ref. This should be initially populated by get_miniserv_config,
1828 get_miniserv_config(\%miniserv);
1829 $miniserv{'port'} = 10005;
1830 put_miniserv_config(\%miniserv);
1834 sub put_miniserv_config
1836 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1840 =head2 restart_miniserv([nowait])
1842 Kill the old miniserv process and re-start it, then optionally waits for
1843 it to restart. This will apply all configuration settings.
1846 sub restart_miniserv
1849 return undef if (&is_readonly_mode());
1851 &get_miniserv_config(\%miniserv) || return;
1854 if ($gconfig{'os_type'} ne 'windows') {
1855 # On Unix systems, we can restart with a signal
1856 my ($pid, $addr, $i);
1857 $miniserv{'inetd'} && return;
1858 my @oldst = stat($miniserv{'pidfile'});
1859 $pid = $ENV{'MINISERV_PID'};
1861 open(PID, $miniserv{'pidfile'}) ||
1862 &error("Failed to open PID file $miniserv{'pidfile'}");
1865 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1868 # Just signal miniserv to restart
1869 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1871 # Wait till new PID is written, indicating a restart
1872 for($i=0; $i<60; $i++) {
1874 my @newst = stat($miniserv{'pidfile'});
1875 last if ($newst[9] != $oldst[9]);
1877 $i < 60 || &error("Webmin server did not write new PID file");
1879 ## Totally kill the process and re-run it
1880 #$SIG{'TERM'} = 'IGNORE';
1881 #&kill_logged('TERM', $pid);
1882 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1885 # On Windows, we need to use the flag file
1886 open(TOUCH, ">$miniserv{'restartflag'}");
1891 # Wait for miniserv to come back up
1892 my $addr = $miniserv{'bind'} || "127.0.0.1";
1894 for($i=0; $i<20; $i++) {
1897 &open_socket($addr, $miniserv{'port'}, STEST, \$err);
1899 last if (!$err && ++$ok >= 2);
1901 $i < 20 || &error("Failed to restart Webmin server!");
1905 =head2 reload_miniserv
1907 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1908 configuration files. Not all changes will be applied though, such as the
1909 IP addresses and ports to accept connections on.
1914 return undef if (&is_readonly_mode());
1916 &get_miniserv_config(\%miniserv) || return;
1918 if ($gconfig{'os_type'} ne 'windows') {
1919 # Send a USR1 signal to re-read the config
1920 my ($pid, $addr, $i);
1921 $miniserv{'inetd'} && return;
1922 $pid = $ENV{'MINISERV_PID'};
1924 open(PID, $miniserv{'pidfile'}) ||
1925 &error("Failed to open PID file $miniserv{'pidfile'}");
1928 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1930 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1932 # Make sure this didn't kill Webmin!
1934 if (!kill(0, $pid)) {
1935 print STDERR "USR1 signal killed Webmin - restarting\n";
1936 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1940 # On Windows, we need to use the flag file
1941 open(TOUCH, ">$miniserv{'reloadflag'}");
1946 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1948 Returns 1 if some module is supported on the current operating system, or the
1949 OS supplies as parameters. The parameters are :
1951 =item minfo - A hash ref of module information, as returned by get_module_info
1953 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1955 =item os-version - The Webmin OS version to use, such as 13.0
1957 =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.
1960 sub check_os_support
1962 my $oss = $_[0]->{'os_support'};
1963 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1964 # May provide usable API
1965 $oss .= " ".$_[0]->{'api_os_support'};
1967 if ($_[0]->{'nozone'} && &running_in_zone()) {
1968 # Not supported in a Solaris Zone
1971 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1972 # Not supported in a Linux Vserver
1975 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1976 # Not supported in an OpenVZ container
1979 return 1 if (!$oss || $oss eq '*');
1980 my $osver = $_[2] || $gconfig{'os_version'};
1981 my $ostype = $_[1] || $gconfig{'os_type'};
1984 my ($os, $ver, $codes);
1985 my ($neg) = ($oss =~ s/^!//); # starts with !
1986 $anyneg++ if ($neg);
1987 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1989 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1991 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1993 $os = $1; $ver = $2; $oss = $3;
1995 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1997 $os = $1; $codes = $2; $oss = $3;
1999 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
2001 $codes = $1; $oss = $2;
2003 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
2005 $os = $1; $oss = $2;
2008 next if ($os && !($os eq $ostype ||
2009 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
2010 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
2011 next if ($osver < $1 || $osver > $2);
2013 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
2014 next if ($osver < $1);
2016 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
2017 next if ($osver > $1);
2020 next if ($ver ne $osver);
2022 next if ($codes && !eval $codes);
2028 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2030 Downloads data from a HTTP url to a local file or string. The parameters are :
2032 =item host - The hostname part of the URL, such as www.google.com
2034 =item port - The HTTP port number, such as 80
2036 =item page - The filename part of the URL, like /index.html
2038 =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.
2040 =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.
2042 =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.
2044 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2046 =item user - If set, HTTP authentication is done with this username.
2048 =item pass - The HTTP password to use with the username above.
2050 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2052 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2054 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2056 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2061 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2062 $timeout, $osdn, $nocache, $headers) = @_;
2063 if ($gconfig{'debug_what_net'}) {
2064 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2065 ($user ? " user=$user pass=$pass" : "").
2066 (ref($dest) ? "" : " dest=$dest"));
2069 # Convert OSDN URL first
2070 my $prot = $ssl ? "https://" : "http://";
2071 my $portstr = $ssl && $port == 443 ||
2072 !$ssl && $port == 80 ? "" : ":$port";
2073 ($host, $port, $page, $ssl) = &parse_http_url(
2074 &convert_osdn_url($prot.$host.$portstr.$page));
2077 # Check if we already have cached the URL
2078 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2079 my $cfile = &check_in_http_cache($url);
2080 if ($cfile && !$nocache) {
2081 # Yes! Copy to dest file or variable
2082 &$cbfunc(6, $url) if ($cbfunc);
2084 &open_readfile(CACHEFILE, $cfile);
2086 $$dest = <CACHEFILE>;
2090 ©_source_dest($cfile, $dest);
2097 push(@headers, [ "Host", $host ]);
2098 push(@headers, [ "User-agent", "Webmin" ]);
2099 push(@headers, [ "Accept-language", "en" ]);
2101 my $auth = &encode_base64("$user:$pass");
2102 $auth =~ tr/\r\n//d;
2103 push(@headers, [ "Authorization", "Basic $auth" ]);
2105 foreach my $hname (keys %$headers) {
2106 push(@headers, [ $hname, $headers->{$hname} ]);
2109 # Actually download it
2110 $main::download_timed_out = undef;
2111 local $SIG{ALRM} = \&download_timeout;
2112 alarm($timeout || 60);
2113 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2115 $h = $main::download_timed_out if ($main::download_timed_out);
2117 if ($error) { $$error = $h; return; }
2118 else { &error($h); }
2120 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2121 $headers, $ssl, $nocache);
2122 if ((!$error || !$$error) && !$nocache) {
2123 &write_to_http_cache($url, $dest);
2127 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2129 Do a HTTP download, after the headers have been sent. For internal use only,
2130 typically called by http_download.
2133 sub complete_http_download
2135 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2141 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2142 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2144 if ($_[2]) { ${$_[2]} = $line; return; }
2145 else { &error("Download failed : $line"); }
2148 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2151 $line = &read_http_connection($_[0]);
2152 $line =~ tr/\r\n//d;
2153 $line =~ /^(\S+):\s+(.*)$/ || last;
2154 $header{lc($1)} = $2;
2155 push(@headers, [ lc($1), $2 ]);
2158 if ($main::download_timed_out) {
2159 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2160 else { &error($main::download_timed_out); }
2162 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2163 if ($rcode >= 300 && $rcode < 400) {
2164 # follow the redirect
2165 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2166 my ($host, $port, $page, $ssl);
2167 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2168 $ssl = $1 eq 'https' ? 1 : 0;
2169 $host = $2; $port = $3; $page = $4 || "/";
2171 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2172 $ssl = $1 eq 'https' ? 1 : 0;
2173 $host = $2; $port = 80; $page = $3 || "/";
2175 elsif ($header{'location'} =~ /^\// && $_[5]) {
2176 # Relative to same server
2180 $page = $header{'location'};
2182 elsif ($header{'location'}) {
2183 # Assume relative to same dir .. not handled
2184 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2185 else { &error("Invalid Location header $header{'location'}"); }
2188 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2189 else { &error("Missing Location header"); }
2192 ($page, $params) = split(/\?/, $page);
2194 $page .= "?".$params if (defined($params));
2195 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2196 undef, undef, undef, $_[4], $_[9], $_[7]);
2201 # Append to a variable
2202 while(defined($buf = &read_http_connection($_[0], 1024))) {
2204 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2210 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2211 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2212 else { &error("Failed to write to $_[1] : $!"); }
2214 binmode(PFILE); # For windows
2215 while(defined($buf = &read_http_connection($_[0], 1024))) {
2216 &print_tempfile(PFILE, $buf);
2217 $got += length($buf);
2218 &$cbfunc(3, $got) if ($cbfunc);
2220 &close_tempfile(PFILE);
2221 if ($header{'content-length'} &&
2222 $got != $header{'content-length'}) {
2223 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2224 else { &error("Download incomplete"); }
2227 &$cbfunc(4) if ($cbfunc);
2229 &close_http_connection($_[0]);
2233 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2235 Download data from an FTP site to a local file. The parameters are :
2237 =item host - FTP server hostname
2239 =item file - File on the FTP server to download
2241 =item destfile - File on the Webmin system to download data to
2243 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2245 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2247 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2249 =item pass - Password for the username above.
2251 =item port - FTP server port number, which defaults to 21 if not set.
2256 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2258 if ($gconfig{'debug_what_net'}) {
2259 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2260 ($user ? " user=$user pass=$pass" : "").
2261 (ref($dest) ? "" : " dest=$dest"));
2265 if (&is_readonly_mode()) {
2266 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2268 else { &error("FTP connections not allowed in readonly mode"); }
2271 # Check if we already have cached the URL
2272 my $url = "ftp://".$host.$file;
2273 my $cfile = &check_in_http_cache($url);
2275 # Yes! Copy to dest file or variable
2276 &$cbfunc(6, $url) if ($cbfunc);
2278 &open_readfile(CACHEFILE, $cfile);
2280 $$dest = <CACHEFILE>;
2284 ©_source_dest($cfile, $dest);
2289 # Actually download it
2290 $main::download_timed_out = undef;
2291 local $SIG{ALRM} = \&download_timeout;
2294 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2295 # download through http-style proxy
2297 if (&open_socket($1, $2, "SOCK", \$error)) {
2299 if ($main::download_timed_out) {
2301 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2302 else { &error($main::download_timed_out); }
2304 my $esc = $_[1]; $esc =~ s/ /%20/g;
2305 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2306 my $portstr = $port == 21 ? "" : ":$port";
2307 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2308 print SOCK "User-agent: Webmin\r\n";
2309 if ($gconfig{'proxy_user'}) {
2310 my $auth = &encode_base64(
2311 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2312 $auth =~ tr/\r\n//d;
2313 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2316 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2319 elsif (!$gconfig{'proxy_fallback'}) {
2321 if ($error) { $$error = $main::download_timed_out; return 0; }
2322 else { &error($main::download_timed_out); }
2327 # connect to host and login with real FTP protocol
2328 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2330 if ($main::download_timed_out) {
2331 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2332 else { &error($main::download_timed_out); }
2334 &ftp_command("", 2, $_[3]) || return 0;
2336 # Login as supplied user
2337 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2339 if (int($urv[1]/100) == 3) {
2340 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2344 # Login as anonymous
2345 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2347 if (int($urv[1]/100) == 3) {
2348 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2352 &$cbfunc(1, 0) if ($cbfunc);
2355 # get the file size and tell the callback
2356 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2357 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2358 defined($size) || return 0;
2360 &$cbfunc(2, int($size));
2364 my $pasv = &ftp_command("PASV", 2, $_[3]);
2365 defined($pasv) || return 0;
2366 $pasv =~ /\(([0-9,]+)\)/;
2367 @n = split(/,/ , $1);
2368 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2369 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2370 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2374 &open_tempfile(PFILE, ">$_[2]", 1);
2375 while(read(CON, $buf, 1024) > 0) {
2376 &print_tempfile(PFILE, $buf);
2377 $got += length($buf);
2378 &$cbfunc(3, $got) if ($cbfunc);
2380 &close_tempfile(PFILE);
2382 if ($got != $size) {
2383 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2384 else { &error("Download incomplete"); }
2386 &$cbfunc(4) if ($cbfunc);
2388 &ftp_command("", 2, $_[3]) || return 0;
2392 &ftp_command("QUIT", 2, $_[3]) || return 0;
2396 &write_to_http_cache($url, $dest);
2400 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2402 Upload data from a local file to an FTP site. The parameters are :
2404 =item host - FTP server hostname
2406 =item file - File on the FTP server to write to
2408 =item srcfile - File on the Webmin system to upload data from
2410 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2412 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2414 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2416 =item pass - Password for the username above.
2418 =item port - FTP server port number, which defaults to 21 if not set.
2425 if (&is_readonly_mode()) {
2426 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2428 else { &error("FTP connections not allowed in readonly mode"); }
2431 $main::download_timed_out = undef;
2432 local $SIG{ALRM} = \&download_timeout;
2435 # connect to host and login
2436 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2438 if ($main::download_timed_out) {
2439 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2440 else { &error($main::download_timed_out); }
2442 &ftp_command("", 2, $_[3]) || return 0;
2444 # Login as supplied user
2445 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2447 if (int($urv[1]/100) == 3) {
2448 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2452 # Login as anonymous
2453 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2455 if (int($urv[1]/100) == 3) {
2456 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2460 &$cbfunc(1, 0) if ($cbfunc);
2462 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2464 # get the file size and tell the callback
2465 my @st = stat($_[2]);
2467 &$cbfunc(2, $st[7]);
2471 my $pasv = &ftp_command("PASV", 2, $_[3]);
2472 defined($pasv) || return 0;
2473 $pasv =~ /\(([0-9,]+)\)/;
2474 @n = split(/,/ , $1);
2475 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2476 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2481 while(read(PFILE, $buf, 1024) > 0) {
2483 $got += length($buf);
2484 &$cbfunc(3, $got) if ($cbfunc);
2488 if ($got != $st[7]) {
2489 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2490 else { &error("Upload incomplete"); }
2492 &$cbfunc(4) if ($cbfunc);
2495 &ftp_command("", 2, $_[3]) || return 0;
2496 &ftp_command("QUIT", 2, $_[3]) || return 0;
2502 =head2 no_proxy(host)
2504 Checks if some host is on the no proxy list. For internal use by the
2505 http_download and ftp_download functions.
2510 my $ip = &to_ipaddress($_[0]);
2511 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2512 return 1 if ($_[0] =~ /\Q$n\E/ ||
2518 =head2 open_socket(host, port, handle, [&error])
2520 Open a TCP connection to some host and port, using a file handle. The
2523 =item host - Hostname or IP address to connect to.
2525 =item port - TCP port number.
2527 =item handle - A file handle name to use for the connection.
2529 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2534 my ($host, $port, $fh, $err) = @_;
2535 $fh = &callers_package($fh);
2537 if ($gconfig{'debug_what_net'}) {
2538 &webmin_debug_log('TCP', "host=$host port=$port");
2541 # Lookup IP address for the host. Try v4 first, and failing that v6
2543 my $proto = getprotobyname("tcp");
2544 if ($ip = &to_ipaddress($host)) {
2545 # Create IPv4 socket and connection
2546 if (!socket($fh, PF_INET(), SOCK_STREAM, $proto)) {
2547 my $msg = "Failed to create socket : $!";
2548 if ($err) { $$err = $msg; return 0; }
2549 else { &error($msg); }
2551 my $addr = inet_aton($ip);
2552 if ($gconfig{'bind_proxy'}) {
2553 # BIND to outgoing IP
2554 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2555 my $msg = "Failed to bind to source address : $!";
2556 if ($err) { $$err = $msg; return 0; }
2557 else { &error($msg); }
2560 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2561 my $msg = "Failed to connect to $host:$port : $!";
2562 if ($err) { $$err = $msg; return 0; }
2563 else { &error($msg); }
2566 elsif ($ip = &to_ip6address($host)) {
2567 # Create IPv6 socket and connection
2568 if (!&supports_ipv6()) {
2569 $msg = "IPv6 connections are not supported";
2570 if ($err) { $$err = $msg; return 0; }
2571 else { &error($msg); }
2573 if (!socket($fh, Socket6::PF_INET6(), SOCK_STREAM, $proto)) {
2574 my $msg = "Failed to create IPv6 socket : $!";
2575 if ($err) { $$err = $msg; return 0; }
2576 else { &error($msg); }
2578 my $addr = inet_pton(Socket6::AF_INET6(), $ip);
2579 if (!connect($fh, pack_sockaddr_in6($port, $addr))) {
2580 my $msg = "Failed to IPv6 connect to $host:$port : $!";
2581 if ($err) { $$err = $msg; return 0; }
2582 else { &error($msg); }
2587 my $msg = "Failed to lookup IP address for $host";
2588 if ($err) { $$err = $msg; return 0; }
2589 else { &error($msg); }
2593 my $old = select($fh);
2599 =head2 download_timeout
2601 Called when a download times out. For internal use only.
2604 sub download_timeout
2606 $main::download_timed_out = "Download timed out";
2609 =head2 ftp_command(command, expected, [&error], [filehandle])
2611 Send an FTP command, and die if the reply is not what was expected. Mainly
2612 for internal use by the ftp_download and ftp_upload functions.
2617 my ($cmd, $expect, $err, $fh) = @_;
2619 $fh = &callers_package($fh);
2622 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2624 print $fh "$cmd\r\n";
2627 if (!($line = <$fh>)) {
2629 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2630 else { &error("Failed to read reply to $what"); }
2632 $line =~ /^(...)(.)(.*)$/;
2635 foreach my $c (@$expect) {
2636 $found++ if (int($1/100) == $c);
2640 $found++ if (int($1/100) == $_[1]);
2644 if ($err) { $$err = "$what failed : $3"; return undef; }
2645 else { &error("$what failed : $3"); }
2650 # Need to skip extra stuff..
2652 if (!($line = <$fh>)) {
2654 if ($$err) { $$err = "Failed to read reply to $what";
2656 else { &error("Failed to read reply to $what"); }
2658 $line =~ /^(....)(.*)$/; $reply .= $2;
2659 if ($1 eq "$rcode ") { last; }
2663 return wantarray ? ($reply, $rcode) : $reply;
2666 =head2 to_ipaddress(hostname)
2668 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2669 it cannot be resolved.
2674 if (&check_ipaddress($_[0])) {
2675 return $_[0]; # Already in v4 format
2677 elsif (&check_ip6address($_[0])) {
2678 return undef; # A v6 address cannot be converted to v4
2681 my $hn = gethostbyname($_[0]);
2682 return undef if (!$hn);
2683 local @ip = unpack("CCCC", $hn);
2684 return join("." , @ip);
2688 =head2 to_ip6address(hostname)
2690 Converts a hostname to IPv6 address, or returns undef if it cannot be resolved.
2695 if (&check_ip6address($_[0])) {
2696 return $_[0]; # Already in v6 format
2698 elsif (&check_ipaddress($_[0])) {
2699 return undef; # A v4 address cannot be v6
2701 elsif (!&supports_ipv6()) {
2702 return undef; # Cannot lookup
2705 # Perform IPv6 DNS lookup
2707 (undef, undef, undef, $inaddr) =
2708 getaddrinfo($_[0], undef, Socket6::AF_INET6(), SOCK_STREAM);
2709 return undef if (!$inaddr);
2711 (undef, $addr) = unpack_sockaddr_in6($inaddr);
2712 return inet_ntop(Socket6::AF_INET6(), $addr);
2716 =head2 to_hostname(ipv4|ipv6-address)
2718 Reverse-resolves an IPv4 or 6 address to a hostname
2724 if (&check_ip6address($addr) && &supports_ipv6()) {
2725 return gethostbyaddr(inet_pton(Socket6::AF_INET6(), $addr),
2726 Socket6::AF_INET6());
2729 return gethostbyaddr(inet_aton($addr), AF_INET);
2733 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2735 Renders a 4-column table of icons. The useful parameters are :
2737 =item links - An array ref of link destination URLs for the icons.
2739 =item titles - An array ref of titles to appear under the icons.
2741 =item icons - An array ref of URLs for icon images.
2743 =item columns - Number of columns to layout the icons with. Defaults to 4.
2748 &load_theme_library();
2749 if (defined(&theme_icons_table)) {
2750 &theme_icons_table(@_);
2754 my $cols = $_[3] ? $_[3] : 4;
2755 my $per = int(100.0 / $cols);
2756 print "<table class='icons_table' width=100% cellpadding=5>\n";
2757 for(my $i=0; $i<@{$_[0]}; $i++) {
2758 if ($i%$cols == 0) { print "<tr>\n"; }
2759 print "<td width=$per% align=center valign=top>\n";
2760 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2761 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2762 $_[7]->[$i], $_[8]->[$i]);
2764 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2766 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2767 print "</tr>\n" if ($need_tr);
2771 =head2 replace_file_line(file, line, [newline]*)
2773 Replaces one line in some file with 0 or more new lines. The parameters are :
2775 =item file - Full path to some file, like /etc/hosts.
2777 =item line - Line number to replace, starting from 0.
2779 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2782 sub replace_file_line
2785 my $realfile = &translate_filename($_[0]);
2786 open(FILE, $realfile);
2789 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2790 else { splice(@lines, $_[1], 1); }
2791 &open_tempfile(FILE, ">$realfile");
2792 &print_tempfile(FILE, @lines);
2793 &close_tempfile(FILE);
2796 =head2 read_file_lines(file, [readonly])
2798 Returns a reference to an array containing the lines from some file. This
2799 array can be modified, and will be written out when flush_file_lines()
2800 is called. The parameters are :
2802 =item file - Full path to the file to read.
2804 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2808 $lref = read_file_lines("/etc/hosts");
2809 push(@$lref, "127.0.0.1 localhost");
2810 flush_file_lines("/etc/hosts");
2816 my ($package, $filename, $line) = caller;
2817 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2819 my $realfile = &translate_filename($_[0]);
2820 if (!$main::file_cache{$realfile}) {
2823 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2824 open(READFILE, $realfile);
2827 $eol = /\r\n$/ ? "\r\n" : "\n";
2833 $main::file_cache{$realfile} = \@lines;
2834 $main::file_cache_noflush{$realfile} = $_[1];
2835 $main::file_cache_eol{$realfile} = $eol || "\n";
2838 # Make read-write if currently readonly
2840 $main::file_cache_noflush{$realfile} = 0;
2843 return $main::file_cache{$realfile};
2846 =head2 flush_file_lines([file], [eol])
2848 Write out to a file previously read by read_file_lines to disk (except
2849 for those marked readonly). The parameters are :
2851 =item file - The file to flush out.
2853 =item eof - End-of-line character for each line. Defaults to \n.
2856 sub flush_file_lines
2860 local $trans = &translate_filename($_[0]);
2861 $main::file_cache{$trans} ||
2862 &error("flush_file_lines called on non-loaded file $trans");
2863 push(@files, $trans);
2866 @files = ( keys %main::file_cache );
2868 foreach my $f (@files) {
2869 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2870 if (!$main::file_cache_noflush{$f}) {
2871 no warnings; # XXX Bareword file handles should go away
2872 &open_tempfile(FLUSHFILE, ">$f");
2873 foreach my $line (@{$main::file_cache{$f}}) {
2874 (print FLUSHFILE $line,$eol) ||
2875 &error(&text("efilewrite", $f, $!));
2877 &close_tempfile(FLUSHFILE);
2879 delete($main::file_cache{$f});
2880 delete($main::file_cache_noflush{$f});
2884 =head2 unflush_file_lines(file)
2886 Clear the internal cache of some given file, previously read by read_file_lines.
2889 sub unflush_file_lines
2891 my $realfile = &translate_filename($_[0]);
2892 delete($main::file_cache{$realfile});
2893 delete($main::file_cache_noflush{$realfile});
2896 =head2 unix_user_input(fieldname, user, [form])
2898 Returns HTML for an input to select a Unix user. By default this is a text
2899 box with a user popup button next to it.
2904 if (defined(&theme_unix_user_input)) {
2905 return &theme_unix_user_input(@_);
2907 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2908 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2911 =head2 unix_group_input(fieldname, user, [form])
2913 Returns HTML for an input to select a Unix group. By default this is a text
2914 box with a group popup button next to it.
2917 sub unix_group_input
2919 if (defined(&theme_unix_group_input)) {
2920 return &theme_unix_group_input(@_);
2922 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2923 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2926 =head2 hlink(text, page, [module], [width], [height])
2928 Returns HTML for a link that when clicked on pops up a window for a Webmin
2929 help page. The parameters are :
2931 =item text - Text for the link.
2933 =item page - Help page code, such as 'intro'.
2935 =item module - Module the help page is in. Defaults to the current module.
2937 =item width - Width of the help popup window. Defaults to 600 pixels.
2939 =item height - Height of the help popup window. Defaults to 400 pixels.
2941 The actual help pages are in each module's help sub-directory, in files with
2947 if (defined(&theme_hlink)) {
2948 return &theme_hlink(@_);
2950 my $mod = $_[2] ? $_[2] : &get_module_name();
2951 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2952 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2953 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>";
2956 =head2 user_chooser_button(field, multiple, [form])
2958 Returns HTML for a javascript button for choosing a Unix user or users.
2959 The parameters are :
2961 =item field - Name of the HTML field to place the username into.
2963 =item multiple - Set to 1 if multiple users can be selected.
2965 =item form - Index of the form on the page.
2968 sub user_chooser_button
2970 return undef if (!&supports_users());
2971 return &theme_user_chooser_button(@_)
2972 if (defined(&theme_user_chooser_button));
2973 my $form = defined($_[2]) ? $_[2] : 0;
2974 my $w = $_[1] ? 500 : 300;
2976 if ($_[1] && $gconfig{'db_sizeusers'}) {
2977 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2979 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2980 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2982 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";
2985 =head2 group_chooser_button(field, multiple, [form])
2987 Returns HTML for a javascript button for choosing a Unix group or groups
2988 The parameters are :
2990 =item field - Name of the HTML field to place the group name into.
2992 =item multiple - Set to 1 if multiple groups can be selected.
2994 =item form - Index of the form on the page.
2997 sub group_chooser_button
2999 return undef if (!&supports_users());
3000 return &theme_group_chooser_button(@_)
3001 if (defined(&theme_group_chooser_button));
3002 my $form = defined($_[2]) ? $_[2] : 0;
3003 my $w = $_[1] ? 500 : 300;
3005 if ($_[1] && $gconfig{'db_sizeusers'}) {
3006 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3008 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3009 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3011 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";
3014 =head2 foreign_check(module, [api-only])
3016 Checks if some other module exists and is supported on this OS. The parameters
3019 =item module - Name of the module to check.
3021 =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.
3026 my ($mod, $api) = @_;
3028 my $mdir = &module_root_directory($mod);
3029 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
3030 return &check_os_support(\%minfo, undef, undef, $api);
3033 =head2 foreign_exists(module)
3035 Checks if some other module exists. The module parameter is the short module
3041 my $mdir = &module_root_directory($_[0]);
3042 return -r "$mdir/module.info";
3045 =head2 foreign_available(module)
3047 Returns 1 if some module is installed, and acessible to the current user. The
3048 module parameter is the module directory name.
3051 sub foreign_available
3053 return 0 if (!&foreign_check($_[0]) &&
3054 !$gconfig{'available_even_if_no_support'});
3055 my %foreign_module_info = &get_module_info($_[0]);
3057 # Check list of allowed modules
3059 &read_acl(\%acl, undef, [ $base_remote_user ]);
3060 return 0 if (!$acl{$base_remote_user,$_[0]} &&
3061 !$acl{$base_remote_user,'*'});
3063 # Check for usermod restrictions
3064 my @usermods = &list_usermods();
3065 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
3067 if (&get_product_name() eq "webmin") {
3068 # Check if the user has any RBAC privileges in this module
3069 if (&supports_rbac($_[0]) &&
3070 &use_rbac_module_acl(undef, $_[0])) {
3071 # RBAC is enabled for this user and module - check if he
3073 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
3074 return 0 if (!$rbacs);
3076 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
3077 # If denying access to modules not specifically allowed by
3078 # RBAC, then prevent access
3083 # Check readonly support
3084 if (&is_readonly_mode()) {
3085 return 0 if (!$foreign_module_info{'readonly'});
3088 # Check if theme vetos
3089 if (defined(&theme_foreign_available)) {
3090 return 0 if (!&theme_foreign_available($_[0]));
3093 # Check if licence module vetos
3094 if ($main::licence_module) {
3095 return 0 if (!&foreign_call($main::licence_module,
3096 "check_module_licence", $_[0]));
3102 =head2 foreign_require(module, [file], [package])
3104 Brings in functions from another module, and places them in the Perl namespace
3105 with the same name as the module. The parameters are :
3107 =item module - The source module's directory name, like sendmail.
3109 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
3111 =item package - Perl package to place the module's functions and global variables in.
3113 If the original module name contains dashes, they will be replaced with _ in
3119 my ($mod, $file, $pkg) = @_;
3120 $pkg ||= $mod || "global";
3121 $pkg =~ s/[^A-Za-z0-9]/_/g;
3124 push(@files, $file);
3128 my %minfo = &get_module_info($mod);
3129 if ($minfo{'library'}) {
3130 @files = split(/\s+/, $minfo{'library'});
3133 @files = ( $mod."-lib.pl" );
3136 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3137 return 1 if (!@files);
3138 foreach my $f (@files) {
3139 $main::done_foreign_require{$pkg,$f}++;
3142 my $mdir = &module_root_directory($mod);
3143 @INC = &unique($mdir, @INC);
3144 -d $mdir || &error("Module $mod does not exist");
3145 if (!&get_module_name() && $mod) {
3148 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3149 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3150 my $code = "package $pkg; ".
3151 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3152 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3153 foreach my $f (@files) {
3154 $code .= "do '$mdir/$f' || die \$@; ";
3157 if (defined($old_fmn)) {
3158 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3161 delete($ENV{'FOREIGN_MODULE_NAME'});
3163 if (defined($old_frd)) {
3164 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3167 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3170 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3174 =head2 foreign_call(module, function, [arg]*)
3176 Call a function in another module. The module parameter is the target module
3177 directory name, function is the perl sub to call, and the remaining parameters
3178 are the arguments. However, unless you need to call a function whose name
3179 is dynamic, it is better to use Perl's cross-module function call syntax
3180 like module::function(args).
3185 my $pkg = $_[0] || "global";
3186 $pkg =~ s/[^A-Za-z0-9]/_/g;
3187 my @args = @_[2 .. @_-1];
3188 $main::foreign_args = \@args;
3189 my @rv = eval <<EOF;
3191 &$_[1](\@{\$main::foreign_args});
3193 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3194 return wantarray ? @rv : $rv[0];
3197 =head2 foreign_config(module, [user-config])
3199 Get the configuration from another module, and return it as a hash. If the
3200 user-config parameter is set to 1, returns the Usermin user-level preferences
3201 for the current user instead.
3206 my ($mod, $uc) = @_;
3209 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3210 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3211 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3214 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3219 =head2 foreign_installed(module, mode)
3221 Checks if the server for some module is installed, and possibly also checks
3222 if the module has been configured by Webmin.
3223 For mode 1, returns 2 if the server is installed and configured for use by
3224 Webmin, 1 if installed but not configured, or 0 otherwise.
3225 For mode 0, returns 1 if installed, 0 if not.
3226 If the module does not provide an install_check.pl script, assumes that
3227 the server is installed.
3230 sub foreign_installed
3232 my ($mod, $configured) = @_;
3233 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3235 return $main::foreign_installed_cache{$mod,$configured};
3239 if (!&foreign_check($mod)) {
3244 my $mdir = &module_root_directory($mod);
3245 if (!-r "$mdir/install_check.pl") {
3246 # Not known, assume OK
3247 $rv = $configured ? 2 : 1;
3250 # Call function to check
3251 &foreign_require($mod, "install_check.pl");
3252 $rv = &foreign_call($mod, "is_installed", $configured);
3255 $main::foreign_installed_cache{$mod,$configured} = $rv;
3260 =head2 foreign_defined(module, function)
3262 Returns 1 if some function is defined in another module. In general, it is
3263 simpler to use the syntax &defined(module::function) instead.
3269 $pkg =~ s/[^A-Za-z0-9]/_/g;
3270 my $func = "${pkg}::$_[1]";
3271 return defined(&$func);
3274 =head2 get_system_hostname([short])
3276 Returns the hostname of this system. If the short parameter is set to 1,
3277 then the domain name is not prepended - otherwise, Webmin will attempt to get
3278 the fully qualified hostname, like foo.example.com.
3281 sub get_system_hostname
3284 if (!$main::get_system_hostname[$m]) {
3285 if ($gconfig{'os_type'} ne 'windows') {
3286 # Try some common Linux hostname files first
3288 if ($gconfig{'os_type'} eq 'redhat-linux') {
3290 &read_env_file("/etc/sysconfig/network", \%nc);
3291 if ($nc{'HOSTNAME'}) {
3292 $fromfile = $nc{'HOSTNAME'};
3295 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3296 my $hn = &read_file_contents("/etc/hostname");
3302 elsif ($gconfig{'os_type'} eq 'open-linux') {
3303 my $hn = &read_file_contents("/etc/HOSTNAME");
3309 elsif ($gconfig{'os_type'} eq 'solaris') {
3310 my $hn = &read_file_contents("/etc/nodename");
3317 # If we found a hostname, use it if value
3318 if ($fromfile && ($m || $fromfile =~ /\./)) {
3320 $fromfile =~ s/\..*$//;
3322 $main::get_system_hostname[$m] = $fromfile;
3326 # Can use hostname command on Unix
3327 &execute_command("hostname", undef,
3328 \$main::get_system_hostname[$m], undef, 0, 1);
3329 chop($main::get_system_hostname[$m]);
3331 eval "use Sys::Hostname";
3333 $main::get_system_hostname[$m] = eval "hostname()";
3335 if ($@ || !$main::get_system_hostname[$m]) {
3336 $main::get_system_hostname[$m] = "UNKNOWN";
3339 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3340 $gconfig{'os_type'} =~ /linux$/ &&
3341 !$gconfig{'no_hostname_f'} && !$_[0]) {
3342 # Try with -f flag to get fully qualified name
3344 my $ex = &execute_command("hostname -f", undef, \$flag,
3347 if ($ex || $flag eq "") {
3348 # -f not supported! We have probably set the
3349 # hostname to just '-f'. Fix the problem
3352 &execute_command("hostname ".
3353 quotemeta($main::get_system_hostname[$m]),
3354 undef, undef, undef, 0, 1);
3358 $main::get_system_hostname[$m] = $flag;
3363 # On Windows, try computername environment variable
3364 return $ENV{'computername'} if ($ENV{'computername'});
3365 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3367 # Fall back to net name command
3368 my $out = `net name 2>&1`;
3369 if ($out =~ /\-+\r?\n(\S+)/) {
3370 $main::get_system_hostname[$m] = $1;
3373 $main::get_system_hostname[$m] = "windows";
3377 return $main::get_system_hostname[$m];
3380 =head2 get_webmin_version
3382 Returns the version of Webmin currently being run, such as 1.450.
3385 sub get_webmin_version
3387 if (!$get_webmin_version) {
3388 open(VERSION, "$root_directory/version") || return 0;
3389 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3392 return $get_webmin_version;
3395 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3397 Returns a hash containing access control options for the given user and module.
3398 By default the current username and module name are used. If the no-rbac flag
3399 is given, the permissions will not be updated based on the user's RBAC role
3400 (as seen on Solaris). If the no-default flag is given, default permissions for
3401 the module will not be included.
3406 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3407 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3408 my $mdir = &module_root_directory($m);
3411 # Read default ACL first, to be overridden by per-user settings
3412 &read_file_cached("$mdir/defaultacl", \%rv);
3414 # If this isn't a master admin user, apply the negative permissions
3415 # so that he doesn't un-expectedly gain access to new features
3417 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3418 if ($gaccess{'negative'}) {
3419 &read_file_cached("$mdir/negativeacl", \%rv);
3423 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3424 # RBAC overrides exist for this user in this module
3425 my $rbac = &get_rbac_module_acl(
3426 defined($_[0]) ? $_[0] : $remote_user, $m);
3427 foreach my $r (keys %$rbac) {
3428 $rv{$r} = $rbac->{$r};
3431 elsif ($gconfig{"risk_$u"} && $m) {
3432 # ACL is defined by user's risk level
3433 my $rf = $gconfig{"risk_$u"}.'.risk';
3434 &read_file_cached("$mdir/$rf", \%rv);
3436 my $sf = $gconfig{"skill_$u"}.'.skill';
3437 &read_file_cached("$mdir/$sf", \%rv);
3440 # Use normal Webmin ACL, if a user is set
3441 my $userdb = &get_userdb_string();
3443 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3444 # Look for this user in the user/group DB, if one is defined
3445 # and if the user might be in the DB
3446 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3447 ref($dbh) || &error(&text('euserdbacl', $dbh));
3448 if ($proto eq "mysql" || $proto eq "postgresql") {
3449 # Find the user in the SQL DB
3450 my $cmd = $dbh->prepare(
3451 "select id from webmin_user where name = ?");
3452 $cmd && $cmd->execute($u) ||
3453 &error(&text('euserdbacl', $dbh->errstr));
3454 my ($id) = $cmd->fetchrow();
3455 $foundindb = 1 if (defined($id));
3458 # Fetch ACLs with SQL
3460 my $cmd = $dbh->prepare(
3461 "select attr,value from webmin_user_acl ".
3462 "where id = ? and module = ?");
3463 $cmd && $cmd->execute($id, $m) ||
3464 &error(&text('euserdbacl', $dbh->errstr));
3465 while(my ($a, $v) = $cmd->fetchrow()) {
3471 elsif ($proto eq "ldap") {
3473 my $rv = $dbh->search(
3475 filter => '(&(cn='.$u.')(objectClass='.
3476 $args->{'userclass'}.'))',
3478 if (!$rv || $rv->code) {
3479 &error(&text('euserdbacl',
3480 $rv ? $rv->error : "Unknown error"));
3482 my ($user) = $rv->all_entries;
3484 # Find ACL sub-object for the module
3485 my $ldapm = $m || "global";
3487 my $rv = $dbh->search(
3488 base => $user->dn(),
3489 filter => '(cn='.$ldapm.')',
3491 if (!$rv || $rv->code) {
3492 &error(&text('euserdbacl',
3493 $rv ? $rv->error : "Unknown error"));
3495 my ($acl) = $rv->all_entries;
3497 foreach my $av ($acl->get_value(
3498 'webminAclEntry')) {
3499 my ($a, $v) = split(/=/, $av,2);
3505 &disconnect_userdb($userdb, $dbh);
3509 # Read from local files
3510 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3511 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3513 "$config_directory/$m/$remote_user.acl",\%rv);
3517 if ($tconfig{'preload_functions'}) {
3518 &load_theme_library();
3520 if (defined(&theme_get_module_acl)) {
3521 %rv = &theme_get_module_acl($u, $m, \%rv);
3526 =head2 get_group_module_acl(group, [module], [no-default])
3528 Returns the ACL for a Webmin group, in an optional module (which defaults to
3529 the current module).
3532 sub get_group_module_acl
3535 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3536 my $mdir = &module_root_directory($m);
3539 &read_file_cached("$mdir/defaultacl", \%rv);
3542 my $userdb = &get_userdb_string();
3545 # Look for this group in the user/group DB
3546 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3547 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3548 if ($proto eq "mysql" || $proto eq "postgresql") {
3549 # Find the group in the SQL DB
3550 my $cmd = $dbh->prepare(
3551 "select id from webmin_group where name = ?");
3552 $cmd && $cmd->execute($g) ||
3553 &error(&text('egroupdbacl', $dbh->errstr));
3554 my ($id) = $cmd->fetchrow();
3555 $foundindb = 1 if (defined($id));
3558 # Fetch ACLs with SQL
3560 my $cmd = $dbh->prepare(
3561 "select attr,value from webmin_group_acl ".
3562 "where id = ? and module = ?");
3563 $cmd && $cmd->execute($id, $m) ||
3564 &error(&text('egroupdbacl', $dbh->errstr));
3565 while(my ($a, $v) = $cmd->fetchrow()) {
3571 elsif ($proto eq "ldap") {
3572 # Find group in LDAP
3573 my $rv = $dbh->search(
3575 filter => '(&(cn='.$g.')(objectClass='.
3576 $args->{'groupclass'}.'))',
3578 if (!$rv || $rv->code) {
3579 &error(&text('egroupdbacl',
3580 $rv ? $rv->error : "Unknown error"));
3582 my ($group) = $rv->all_entries;
3584 # Find ACL sub-object for the module
3585 my $ldapm = $m || "global";
3587 my $rv = $dbh->search(
3588 base => $group->dn(),
3589 filter => '(cn='.$ldapm.')',
3591 if (!$rv || $rv->code) {
3592 &error(&text('egroupdbacl',
3593 $rv ? $rv->error : "Unknown error"));
3595 my ($acl) = $rv->all_entries;
3597 foreach my $av ($acl->get_value(
3598 'webminAclEntry')) {
3599 my ($a, $v) = split(/=/, $av, 2);
3605 &disconnect_userdb($userdb, $dbh);
3608 # Read from local files
3609 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3611 if (defined(&theme_get_module_acl)) {
3612 %rv = &theme_get_module_acl($g, $m, \%rv);
3617 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3619 Updates the acl hash for some user and module. The parameters are :
3621 =item acl - Hash reference for the new access control options, or undef to clear
3623 =item user - User to update, defaulting to the current user.
3625 =item module - Module to update, defaulting to the caller.
3627 =item never-update-group - Never update the user's group's ACL
3632 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3633 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3634 if (!$_[3] && &foreign_check("acl")) {
3635 # Check if this user is a member of a group, and if he gets the
3636 # module from a group. If so, update its ACL as well
3637 &foreign_require("acl", "acl-lib.pl");
3639 foreach my $g (&acl::list_groups()) {
3640 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3641 &indexof($m, @{$g->{'modules'}}) >= 0) {
3647 &save_group_module_acl($_[0], $group->{'name'}, $m);
3651 my $userdb = &get_userdb_string();
3653 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3654 # Look for this user in the user/group DB
3655 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3656 ref($dbh) || &error(&text('euserdbacl', $dbh));
3657 if ($proto eq "mysql" || $proto eq "postgresql") {
3658 # Find the user in the SQL DB
3659 my $cmd = $dbh->prepare(
3660 "select id from webmin_user where name = ?");
3661 $cmd && $cmd->execute($u) ||
3662 &error(&text('euserdbacl2', $dbh->errstr));
3663 my ($id) = $cmd->fetchrow();
3664 $foundindb = 1 if (defined($id));
3667 # Replace ACLs for user
3669 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3670 "where id = ? and module = ?");
3671 $cmd && $cmd->execute($id, $m) ||
3672 &error(&text('euserdbacl', $dbh->errstr));
3675 my $cmd = $dbh->prepare(
3676 "insert into webmin_user_acl ".
3677 "(id,module,attr,value) values (?,?,?,?)");
3678 $cmd || &error(&text('euserdbacl2',
3680 foreach my $a (keys %{$_[0]}) {
3681 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3682 &error(&text('euserdbacl2',
3689 elsif ($proto eq "ldap") {
3690 # Find the user in LDAP
3691 my $rv = $dbh->search(
3693 filter => '(&(cn='.$u.')(objectClass='.
3694 $args->{'userclass'}.'))',
3696 if (!$rv || $rv->code) {
3697 &error(&text('euserdbacl',
3698 $rv ? $rv->error : "Unknown error"));
3700 my ($user) = $rv->all_entries;
3703 # Find the ACL sub-object for the module
3705 my $ldapm = $m || "global";
3706 my $rv = $dbh->search(
3707 base => $user->dn(),
3708 filter => '(cn='.$ldapm.')',
3710 if (!$rv || $rv->code) {
3711 &error(&text('euserdbacl',
3712 $rv ? $rv->error : "Unknown error"));
3714 my ($acl) = $rv->all_entries;
3717 foreach my $a (keys %{$_[0]}) {
3718 push(@al, $a."=".$_[0]->{$a});
3722 $rv = $dbh->modify($acl->dn(),
3723 replace => { "webminAclEntry", \@al });
3727 my @attrs = ( "cn", $ldapm,
3728 "objectClass", "webminAcl",
3729 "webminAclEntry", \@al );
3730 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3733 if (!$rv || $rv->code) {
3734 &error(&text('euserdbacl2',
3735 $rv ? $rv->error : "Unknown error"));
3739 &disconnect_userdb($userdb, $dbh);
3743 # Save ACL to local file
3744 if (!-d "$config_directory/$m") {
3745 mkdir("$config_directory/$m", 0755);
3748 &write_file("$config_directory/$m/$u.acl", $_[0]);
3751 &unlink_file("$config_directory/$m/$u.acl");
3756 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3758 Updates the acl hash for some group and module. The parameters are :
3760 =item acl - Hash reference for the new access control options.
3762 =item group - Group name to update.
3764 =item module - Module to update, defaulting to the caller.
3766 =item never-update-group - Never update the parent group's ACL
3769 sub save_group_module_acl
3772 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3773 if (!$_[3] && &foreign_check("acl")) {
3774 # Check if this group is a member of a group, and if it gets the
3775 # module from a group. If so, update the parent ACL as well
3776 &foreign_require("acl", "acl-lib.pl");
3778 foreach my $pg (&acl::list_groups()) {
3779 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3780 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3786 &save_group_module_acl($_[0], $group->{'name'}, $m);
3790 my $userdb = &get_userdb_string();
3793 # Look for this group in the user/group DB
3794 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3795 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3796 if ($proto eq "mysql" || $proto eq "postgresql") {
3797 # Find the group in the SQL DB
3798 my $cmd = $dbh->prepare(
3799 "select id from webmin_group where name = ?");
3800 $cmd && $cmd->execute($g) ||
3801 &error(&text('egroupdbacl2', $dbh->errstr));
3802 my ($id) = $cmd->fetchrow();
3803 $foundindb = 1 if (defined($id));
3806 # Replace ACLs for group
3808 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3809 "where id = ? and module = ?");
3810 $cmd && $cmd->execute($id, $m) ||
3811 &error(&text('egroupdbacl', $dbh->errstr));
3814 my $cmd = $dbh->prepare(
3815 "insert into webmin_group_acl ".
3816 "(id,module,attr,value) values (?,?,?,?)");
3817 $cmd || &error(&text('egroupdbacl2',
3819 foreach my $a (keys %{$_[0]}) {
3820 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3821 &error(&text('egroupdbacl2',
3828 elsif ($proto eq "ldap") {
3829 # Find the group in LDAP
3830 my $rv = $dbh->search(
3832 filter => '(&(cn='.$g.')(objectClass='.
3833 $args->{'groupclass'}.'))',
3835 if (!$rv || $rv->code) {
3836 &error(&text('egroupdbacl',
3837 $rv ? $rv->error : "Unknown error"));
3839 my ($group) = $rv->all_entries;
3841 my $ldapm = $m || "global";
3843 # Find the ACL sub-object for the module
3845 my $rv = $dbh->search(
3846 base => $group->dn(),
3847 filter => '(cn='.$ldapm.')',
3849 if (!$rv || $rv->code) {
3850 &error(&text('egroupdbacl',
3851 $rv ? $rv->error : "Unknown error"));
3853 my ($acl) = $rv->all_entries;
3856 foreach my $a (keys %{$_[0]}) {
3857 push(@al, $a."=".$_[0]->{$a});
3861 $rv = $dbh->modify($acl->dn(),
3862 replace => { "webminAclEntry", \@al });
3866 my @attrs = ( "cn", $ldapm,
3867 "objectClass", "webminAcl",
3868 "webminAclEntry", \@al );
3869 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
3872 if (!$rv || $rv->code) {
3873 &error(&text('egroupdbacl2',
3874 $rv ? $rv->error : "Unknown error"));
3878 &disconnect_userdb($userdb, $dbh);
3882 # Save ACL to local file
3883 if (!-d "$config_directory/$m") {
3884 mkdir("$config_directory/$m", 0755);
3887 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3890 &unlink_file("$config_directory/$m/$g.gacl");
3897 This function must be called by all Webmin CGI scripts, either directly or
3898 indirectly via a per-module lib.pl file. It performs a number of initialization
3899 and housekeeping tasks, such as working out the module name, checking that the
3900 current user has access to the module, and populating global variables. Some
3901 of the variables set include :
3903 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3905 =item $var_directory - Base logs directory, typically /var/webmin
3907 =item %config - Per-module configuration.
3909 =item %gconfig - Global configuration.
3911 =item $scriptname - Base name of the current perl script.
3913 =item $module_name - The name of the current module.
3915 =item $module_config_directory - The config directory for this module.
3917 =item $module_config_file - The config file for this module.
3919 =item $module_root_directory - This module's code directory.
3921 =item $webmin_logfile - The detailed logfile for webmin.
3923 =item $remote_user - The actual username used to login to webmin.
3925 =item $base_remote_user - The username whose permissions are in effect.
3927 =item $current_theme - The theme currently in use.
3929 =item $root_directory - The first root directory of this webmin install.
3931 =item @root_directories - All root directories for this webmin install.
3936 # Record first process ID that called this, so we know when it exited to clean
3938 $main::initial_process_id ||= $$;
3940 # Configuration and spool directories
3941 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3942 die "WEBMIN_CONFIG not set";
3944 $config_directory = $ENV{'WEBMIN_CONFIG'};
3945 if (!defined($ENV{'WEBMIN_VAR'})) {
3946 open(VARPATH, "$config_directory/var-path");
3947 chop($var_directory = <VARPATH>);
3951 $var_directory = $ENV{'WEBMIN_VAR'};
3953 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3954 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3956 if ($ENV{'SESSION_ID'}) {
3957 # Hide this variable from called programs, but keep it for internal use
3958 $main::session_id = $ENV{'SESSION_ID'};
3959 delete($ENV{'SESSION_ID'});
3961 if ($ENV{'REMOTE_PASS'}) {
3962 # Hide the password too
3963 $main::remote_pass = $ENV{'REMOTE_PASS'};
3964 delete($ENV{'REMOTE_PASS'});
3967 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3968 # Looks like we are running setuid, but the real UID hasn't been set.
3969 # Do so now, so that executed programs don't get confused
3974 # Read the webmin global config file. This contains the OS type and version,
3975 # OS specific configuration and global options such as proxy servers
3976 $config_file = "$config_directory/config";
3978 &read_file_cached($config_file, \%gconfig);
3979 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3980 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3982 # If debugging is enabled, open the debug log
3983 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3984 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3985 if ($gconfig{'debug_size'}) {
3986 my @st = stat($dlog);
3987 if ($st[7] > $gconfig{'debug_size'}) {
3988 rename($dlog, $dlog.".0");
3991 open(main::DEBUGLOG, ">>$dlog");
3992 $main::opened_debug_log = 1;
3994 if ($gconfig{'debug_what_start'}) {
3995 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3996 $main::debug_log_start_time = time();
3997 &webmin_debug_log("START", "script=$script_name");
3998 $main::debug_log_start_module = $module_name;
4002 # Set PATH and LD_LIBRARY_PATH
4003 if ($gconfig{'path'}) {
4004 if ($gconfig{'syspath'}) {
4006 $ENV{'PATH'} = $gconfig{'path'};
4010 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
4013 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
4015 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
4016 if ($gconfig{'http_proxy'}) {
4017 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
4019 if ($gconfig{'ftp_proxy'}) {
4020 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
4022 if ($gconfig{'noproxy'}) {
4023 $ENV{'no_proxy'} = $gconfig{'noproxy'};
4026 # Find all root directories
4028 if (&get_miniserv_config(\%miniserv)) {
4029 @root_directories = ( $miniserv{'root'} );
4030 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
4031 push(@root_directories, $miniserv{"extraroot_$i"});
4035 # Work out which module we are in, and read the per-module config file
4036 $0 =~ s/\\/\//g; # Force consistent path on Windows
4037 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
4038 # In a foreign call - use the module name given
4039 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
4040 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
4041 @root_directories = ( $root_directory ) if (!@root_directories);
4043 elsif ($ENV{'SCRIPT_NAME'}) {
4044 my $sn = $ENV{'SCRIPT_NAME'};
4045 $sn =~ s/^$gconfig{'webprefix'}//
4046 if (!$gconfig{'webprefixnoredir'});
4047 if ($sn =~ /^\/([^\/]+)\//) {
4048 # Get module name from CGI path
4051 if ($ENV{'SERVER_ROOT'}) {
4052 $root_directory = $ENV{'SERVER_ROOT'};
4054 elsif ($ENV{'SCRIPT_FILENAME'}) {
4055 $root_directory = $ENV{'SCRIPT_FILENAME'};
4056 $root_directory =~ s/$sn$//;
4058 @root_directories = ( $root_directory ) if (!@root_directories);
4061 # Get root directory from miniserv.conf, and deduce module name from $0
4062 $root_directory = $root_directories[0];
4064 foreach my $r (@root_directories) {
4065 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
4066 # Under a module directory
4071 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
4077 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
4080 # Work out of this is a web, command line or cron job
4081 if (!$main::webmin_script_type) {
4082 if ($ENV{'SCRIPT_NAME'}) {
4084 $main::webmin_script_type = 'web';
4087 # Cron jobs have no TTY
4088 if ($gconfig{'os_type'} eq 'windows' ||
4089 open(DEVTTY, ">/dev/tty")) {
4090 $main::webmin_script_type = 'cmd';
4094 $main::webmin_script_type = 'cron';
4099 # Set the umask based on config
4100 if ($gconfig{'umask'} && !$main::umask_already++) {
4101 umask(oct($gconfig{'umask'}));
4104 # If this is a cron job or other background task, set the nice level
4105 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4107 if ($gconfig{'nice'}) {
4108 eval 'POSIX::nice($gconfig{\'nice\'});';
4111 # Set IO scheduling class and priority
4112 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4114 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4115 if ($gconfig{'sclass'} ne '');
4116 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4117 if ($gconfig{'sprio'} ne '');
4119 &execute_command("$cmd >/dev/null 2>&1");
4122 $main::nice_already++;
4125 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4126 $base_remote_user = $u;
4127 $remote_user = $ENV{'REMOTE_USER'};
4129 # Work out if user is definitely in the DB, and if so get his attrs
4130 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4131 %remote_user_attrs = ( );
4132 if ($remote_user_proto) {
4133 my $userdb = &get_userdb_string();
4134 my ($dbh, $proto, $prefix, $args) =
4135 $userdb ? &connect_userdb($userdb) : ( );
4137 if ($proto eq "mysql" || $proto eq "postgresql") {
4138 # Read attrs from SQL
4139 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
4140 if ($cmd && $cmd->execute($base_remote_user)) {
4141 while(my ($attr, $value) = $cmd->fetchrow()) {
4142 $remote_user_attrs{$attr} = $value;
4147 elsif ($proto eq "ldap") {
4148 # Read attrs from LDAP
4149 my $rv = $dbh->search(
4151 filter => '(&(cn='.$base_remote_user.')'.
4153 $args->{'userclass'}.'))',
4155 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4157 foreach $la ($u->get_value('webminAttr')) {
4158 my ($attr, $value) = split(/=/, $la, 2);
4159 $remote_user_attrs{$attr} = $value;
4163 &disconnect_userdb($userdb, $dbh);
4168 # Find and load the configuration file for this module
4169 my (@ruinfo, $rgroup);
4170 $module_config_directory = "$config_directory/$module_name";
4171 if (&get_product_name() eq "usermin" &&
4172 -r "$module_config_directory/config.$remote_user") {
4174 $module_config_file = "$module_config_directory/config.$remote_user";
4176 elsif (&get_product_name() eq "usermin" &&
4177 (@ruinfo = getpwnam($remote_user)) &&
4178 ($rgroup = getgrgid($ruinfo[3])) &&
4179 -r "$module_config_directory/config.\@$rgroup") {
4180 # Based on group name
4181 $module_config_file = "$module_config_directory/config.\@$rgroup";
4185 $module_config_file = "$module_config_directory/config";
4188 &read_file_cached($module_config_file, \%config);
4190 # Fix up windows-specific substitutions in values
4191 foreach my $k (keys %config) {
4192 if ($config{$k} =~ /\$\{systemroot\}/) {
4193 my $root = &get_windows_root();
4194 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4199 # Record the initial module
4200 $main::initial_module_name ||= $module_name;
4202 # Set some useful variables
4204 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4205 $gconfig{'mobile_theme'} :
4206 defined($remote_user_attrs{'theme'}) ?
4207 $remote_user_attrs{'theme'} :
4208 defined($gconfig{'theme_'.$remote_user}) ?
4209 $gconfig{'theme_'.$remote_user} :
4210 defined($gconfig{'theme_'.$base_remote_user}) ?
4211 $gconfig{'theme_'.$base_remote_user} :
4213 @current_themes = split(/\s+/, $current_themes);
4214 $current_theme = $current_themes[0];
4215 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4216 $theme_root_directory = $theme_root_directories[0];
4217 @theme_configs = ( );
4218 foreach my $troot (@theme_root_directories) {
4220 &read_file_cached("$troot/config", \%onetconfig);
4221 &read_file_cached("$troot/config", \%tconfig);
4222 push(@theme_configs, \%onetconfig);
4224 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4225 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4227 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4228 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4230 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4231 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4232 if ($tconfig{'preload_functions'}) {
4233 # Force load of theme functions right now, if requested
4234 &load_theme_library();
4236 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4237 # Load the theme's Webmin:: package classes
4238 do "$theme_root_directory/$tconfig{'oofunctions'}";
4243 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4244 : "$var_directory/webmin.log";
4246 # Load language strings into %text
4247 my @langs = &list_languages();
4249 if ($gconfig{'acceptlang'}) {
4250 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4251 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4253 $accepted_lang = $al->{'lang'};
4258 $current_lang = $force_lang ? $force_lang :
4259 $accepted_lang ? $accepted_lang :
4260 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4261 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4262 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4263 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4264 foreach my $l (@langs) {
4265 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4267 @lang_order_list = &unique($default_lang,
4268 split(/:/, $current_lang_info->{'fallback'}),
4270 %text = &load_language($module_name);
4271 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4273 # Get the %module_info for this module
4275 my ($mi) = grep { $_->{'dir'} eq $module_name }
4276 &get_all_module_infos(2);
4277 %module_info = %$mi;
4278 $module_root_directory = &module_root_directory($module_name);
4281 if ($module_name && !$main::no_acl_check &&
4282 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4283 # Check if the HTTP user can access this module
4284 if (!&foreign_available($module_name)) {
4285 if (!&foreign_check($module_name)) {
4286 &error(&text('emodulecheck',
4287 "<i>$module_info{'desc'}</i>"));
4290 &error(&text('emodule', "<i>$u</i>",
4291 "<i>$module_info{'desc'}</i>"));
4294 $main::no_acl_check++;
4297 # Check the Referer: header for nasty redirects
4298 my @referers = split(/\s+/, $gconfig{'referers'});
4300 my $r = $ENV{'HTTP_REFERER'};
4301 if ($r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?\[([^\]]+)\]/ ||
4302 $r =~ /^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4305 my $http_host = $ENV{'HTTP_HOST'};
4306 $http_host =~ s/:\d+$//;
4307 $http_host =~ s/^\[(\S+)\]$/$1/;
4308 my $unsafe_index = $unsafe_index_cgi ||
4309 &get_module_variable('$unsafe_index_cgi');
4311 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4312 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4314 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4315 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4316 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4317 ($referer_site && $referer_site ne $http_host &&
4318 &indexof($referer_site, @referers) < 0 ||
4319 !$referer_site && $gconfig{'referers_none'}) &&
4320 !$trust_unknown_referers &&
4321 !&get_module_variable('$trust_unknown_referers')) {
4322 # Looks like a link from elsewhere .. show an error
4323 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4325 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4326 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4327 if ($referer_site) {
4329 print &text('referer_warn',
4330 "<tt>".&html_escape($r)."</tt>", $url);
4332 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4333 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4336 # No referer info given
4337 print &text('referer_warn_unknown', $url),"<p>\n";
4338 print &text('referer_fix1u'),"<p>\n";
4339 print &text('referer_fix2u'),"<p>\n";
4343 &footer("/", $text{'index'});
4346 $main::no_referers_check++;
4347 $main::completed_referers_check++;
4349 # Call theme post-init
4350 if (defined(&theme_post_init_config)) {
4351 &theme_post_init_config(@_);
4354 # Record that we have done the calling library in this package
4355 my ($callpkg, $lib) = caller();
4357 $main::done_foreign_require{$callpkg,$lib} = 1;
4359 # If a licence checking is enabled, do it now
4360 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4361 &foreign_check($gconfig{'licence_module'}) &&
4362 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4363 my $oldpwd = &get_current_dir();
4364 $main::done_licence_module_check++;
4365 $main::licence_module = $gconfig{'licence_module'};
4366 &foreign_require($main::licence_module, "licence_check.pl");
4367 ($main::licence_status, $main::licence_message) =
4368 &foreign_call($main::licence_module, "check_licence");
4372 # Export global variables to caller
4373 if ($main::export_to_caller) {
4374 foreach my $v ('$config_file', '%gconfig', '$null_file',
4375 '$path_separator', '@root_directories',
4376 '$root_directory', '$module_name',
4377 '$base_remote_user', '$remote_user',
4378 '$remote_user_proto', '%remote_user_attrs',
4379 '$module_config_directory', '$module_config_file',
4380 '%config', '@current_themes', '$current_theme',
4381 '@theme_root_directories', '$theme_root_directory',
4382 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4383 '$webmin_logfile', '$current_lang',
4384 '$current_lang_info', '@lang_order_list', '%text',
4385 '%module_info', '$module_root_directory') {
4386 my ($vt, $vn) = split('', $v, 2);
4387 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4394 =head2 load_language([module], [directory])
4396 Returns a hashtable mapping text codes to strings in the appropriate language,
4397 based on the $current_lang global variable, which is in turn set based on
4398 the Webmin user's selection. The optional module parameter tells the function
4399 which module to load strings for, and defaults to the calling module. The
4400 optional directory parameter can be used to load strings from a directory
4403 In regular module development you will never need to call this function
4404 directly, as init_config calls it for you, and places the module's strings
4405 into the %text hash.
4411 my $root = $root_directory;
4412 my $ol = $gconfig{'overlang'};
4413 my ($dir) = ($_[1] || "lang");
4415 # Read global lang files
4416 foreach my $o (@lang_order_list) {
4417 my $ok = &read_file_cached("$root/$dir/$o", \%text);
4418 return () if (!$ok && $o eq $default_lang);
4421 foreach my $o (@lang_order_list) {
4422 &read_file_cached("$root/$ol/$o", \%text);
4425 &read_file_cached("$config_directory/custom-lang", \%text);
4426 my $norefs = $text{'__norefs'};
4429 # Read module's lang files
4430 delete($text{'__norefs'});
4431 my $mdir = &module_root_directory($_[0]);
4432 foreach my $o (@lang_order_list) {
4433 &read_file_cached("$mdir/$dir/$o", \%text);
4436 foreach $o (@lang_order_list) {
4437 &read_file_cached("$mdir/$ol/$o", \%text);
4440 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4441 $norefs = $text{'__norefs'} if ($norefs);
4444 # Replace references to other strings
4446 foreach $k (keys %text) {
4447 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4451 if (defined(&theme_load_language)) {
4452 &theme_load_language(\%text, $_[0]);
4457 =head2 text_subs(string)
4459 Used internally by load_language to expand $code substitutions in language
4465 if (substr($_[0], 0, 8) eq "include:") {
4468 open(INCLUDE, substr($_[0], 8));
4476 my $t = $_[1]->{$_[0]};
4477 return defined($t) ? $t : '$'.$_[0];
4481 =head2 text(message, [substitute]+)
4483 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4484 the substitute parameters. This makes it easy to use strings with placeholders
4485 that get replaced with programmatically generated text. For example :
4487 print &text('index_hello', $remote_user),"<p>\n";
4492 my $t = &get_module_variable('%text', 1);
4493 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4494 for(my $i=1; $i<@_; $i++) {
4495 $rv =~ s/\$$i/$_[$i]/g;
4500 =head2 encode_base64(string)
4502 Encodes a string into base64 format, for use in MIME email or HTTP
4503 authorization headers.
4509 pos($_[0]) = 0; # ensure start at the beginning
4510 while ($_[0] =~ /(.{1,57})/gs) {
4511 $res .= substr(pack('u57', $1), 1)."\n";
4514 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4515 my $padding = (3 - length($_[0]) % 3) % 3;
4516 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4520 =head2 decode_base64(string)
4522 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4529 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4530 if (length($str) % 4) {
4533 $str =~ s/=+$//; # remove padding
4534 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4535 while ($str =~ /(.{1,60})/gs) {
4536 my $len = chr(32 + length($1)*3/4); # compute length byte
4537 $res .= unpack("u", $len . $1 ); # uudecode
4542 =head2 get_module_info(module, [noclone], [forcache])
4544 Returns a hash containg details of the given module. Some useful keys are :
4546 =item dir - The module directory, like sendmail.
4548 =item desc - Human-readable description, in the current users' language.
4550 =item version - Optional module version number.
4552 =item os_support - List of supported operating systems and versions.
4554 =item category - Category on Webmin's left menu, like net.
4559 return () if ($_[0] =~ /^\./);
4560 my (%rv, $clone, $o);
4561 my $mdir = &module_root_directory($_[0]);
4562 &read_file_cached("$mdir/module.info", \%rv) || return ();
4564 # A clone is a module that links to another directory under the root
4565 foreach my $r (@root_directories) {
4566 if (&is_under_directory($r, $mdir)) {
4572 foreach $o (@lang_order_list) {
4573 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4574 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4576 if ($clone && !$_[1] && $config_directory) {
4577 $rv{'clone'} = $rv{'desc'};
4578 &read_file("$config_directory/$_[0]/clone", \%rv);
4581 my %module_categories;
4582 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4583 my $pn = &get_product_name();
4584 if (defined($rv{'category_'.$pn})) {
4585 # Can override category for webmin/usermin
4586 $rv{'category'} = $rv{'category_'.$pn};
4588 $rv{'realcategory'} = $rv{'category'};
4589 $rv{'category'} = $module_categories{$_[0]}
4590 if (defined($module_categories{$_[0]}));
4592 # Apply description overrides
4593 $rv{'realdesc'} = $rv{'desc'};
4595 &read_file_cached("$config_directory/webmin.descs", \%descs);
4596 if ($descs{$_[0]." ".$current_lang}) {
4597 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4599 elsif ($descs{$_[0]}) {
4600 $rv{'desc'} = $descs{$_[0]};
4604 # Apply per-user description overridde
4605 my %gaccess = &get_module_acl(undef, "");
4606 if ($gaccess{'desc_'.$_[0]}) {
4607 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4611 if ($rv{'longdesc'}) {
4612 # All standard modules have an index.cgi
4613 $rv{'index_link'} = 'index.cgi';
4616 # Call theme-specific override function
4617 if (defined(&theme_get_module_info)) {
4618 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4624 =head2 get_all_module_infos(cachemode)
4626 Returns a list contains the information on all modules in this webmin
4627 install, including clones. Uses caching to reduce the number of module.info
4628 files that need to be read. Each element of the array is a hash reference
4629 in the same format as returned by get_module_info. The cache mode flag can be :
4630 0 = read and write, 1 = don't read or write, 2 = read only
4633 sub get_all_module_infos
4637 # Is the cache out of date? (ie. have any of the root's changed?)
4638 my $cache_file = "$config_directory/module.infos.cache";
4640 if (&read_file_cached($cache_file, \%cache)) {
4641 foreach my $r (@root_directories) {
4643 if ($st[9] != $cache{'mtime_'.$r}) {
4653 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4654 # Can use existing module.info cache
4656 foreach my $k (keys %cache) {
4657 if ($k =~ /^(\S+) (\S+)$/) {
4658 $mods{$1}->{$2} = $cache{$k};
4661 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4664 # Need to rebuild cache
4666 foreach my $r (@root_directories) {
4668 foreach my $m (readdir(DIR)) {
4669 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4670 my %minfo = &get_module_info($m, 0, 1);
4671 next if (!%minfo || !$minfo{'dir'});
4673 foreach $k (keys %minfo) {
4674 $cache{"${m} ${k}"} = $minfo{$k};
4679 $cache{'mtime_'.$r} = $st[9];
4681 $cache{'lang'} = $current_lang;
4682 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4685 # Override descriptions for modules for current user
4686 my %gaccess = &get_module_acl(undef, "");
4687 foreach my $m (@rv) {
4688 if ($gaccess{"desc_".$m->{'dir'}}) {
4689 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4693 # Apply installed flags
4695 &read_file_cached("$config_directory/installed.cache", \%installed);
4696 foreach my $m (@rv) {
4697 $m->{'installed'} = $installed{$m->{'dir'}};
4703 =head2 get_theme_info(theme)
4705 Returns a hash containing a theme's details, taken from it's theme.info file.
4706 Some useful keys are :
4708 =item dir - The theme directory, like blue-theme.
4710 =item desc - Human-readable description, in the current users' language.
4712 =item version - Optional module version number.
4714 =item os_support - List of supported operating systems and versions.
4719 return () if ($_[0] =~ /^\./);
4721 my $tdir = &module_root_directory($_[0]);
4722 &read_file("$tdir/theme.info", \%rv) || return ();
4723 foreach my $o (@lang_order_list) {
4724 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4730 =head2 list_languages
4732 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4733 Each is a hash reference with the following keys :
4735 =item lang - The short language code, like es for Spanish.
4737 =item desc - A human-readable description, in English.
4739 =item charset - An optional character set to use when displaying the language.
4741 =item titles - Set to 1 only if Webmin has title images for the language.
4743 =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.
4748 if (!@main::list_languages_cache) {
4751 open(LANG, "$root_directory/lang_list.txt");
4753 if (/^(\S+)\s+(.*)/) {
4754 my $l = { 'desc' => $2 };
4755 foreach $o (split(/,/, $1)) {
4756 if ($o =~ /^([^=]+)=(.*)$/) {
4760 $l->{'index'} = scalar(@rv);
4761 push(@main::list_languages_cache, $l);
4765 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4766 @main::list_languages_cache;
4768 return @main::list_languages_cache;
4771 =head2 read_env_file(file, &hash)
4773 Similar to Webmin's read_file function, but handles files containing shell
4774 environment variables formatted like :
4779 The file parameter is the full path to the file to read, and hash a Perl hash
4780 ref to read names and values into.
4786 &open_readfile(FILE, $_[0]) || return 0;
4789 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4790 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4791 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4799 =head2 write_env_file(file, &hash, [export])
4801 Writes out a hash to a file in name='value' format, suitable for use in a shell
4802 script. The parameters are :
4804 =item file - Full path for a file to write to
4806 =item hash - Hash reference of names and values to write.
4808 =item export - If set to 1, preceed each variable setting with the word 'export'.
4813 my $exp = $_[2] ? "export " : "";
4814 &open_tempfile(FILE, ">$_[0]");
4815 foreach my $k (keys %{$_[1]}) {
4816 my $v = $_[1]->{$k};
4817 if ($v =~ /^\S+$/) {
4818 &print_tempfile(FILE, "$exp$k=$v\n");
4821 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4824 &close_tempfile(FILE);
4827 =head2 lock_file(filename, [readonly], [forcefile])
4829 Lock a file for exclusive access. If the file is already locked, spin
4830 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4831 to work OK. The parameters are :
4833 =item filename - File or directory to lock.
4835 =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.
4837 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4842 my $realfile = &translate_filename($_[0]);
4843 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4844 my $no_lock = !&can_lock_file($realfile);
4845 my $lock_tries_count = 0;
4848 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4853 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4856 # Create the .lock file
4857 open(LOCKING, ">$realfile.lock") || return 0;
4858 my $lck = eval "flock(LOCKING, 2+4)";
4860 # Lock of lock file failed! Wait till later
4863 print LOCKING $$,"\n";
4864 eval "flock(LOCKING, 8)";
4867 $main::locked_file_list{$realfile} = int($_[1]);
4868 push(@main::temporary_files, "$realfile.lock");
4869 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4870 !&get_module_variable('$no_log_file_changes') &&
4872 # Grab a copy of this file for later diffing
4874 $main::locked_file_data{$realfile} = undef;
4876 $main::locked_file_type{$realfile} = 1;
4877 $main::locked_file_data{$realfile} = '';
4879 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4880 $main::locked_file_type{$realfile} = 2;
4881 $main::locked_file_data{$realfile} = $lnk;
4883 elsif (open(ORIGFILE, $realfile)) {
4884 $main::locked_file_type{$realfile} = 0;
4885 $main::locked_file_data{$realfile} = '';
4888 $main::locked_file_data{$realfile} .=$_;
4897 if ($lock_tries_count++ > 5*60) {
4898 # Give up after 5 minutes
4899 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4905 =head2 unlock_file(filename)
4907 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4908 file changes is enabled, then at unlock file a diff will be taken between the
4909 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4910 called. This can then be viewed in the Webmin Actions Log module.
4915 my $realfile = &translate_filename($_[0]);
4916 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4917 unlink("$realfile.lock") if (&can_lock_file($realfile));
4918 delete($main::locked_file_list{$realfile});
4919 if (exists($main::locked_file_data{$realfile})) {
4920 # Diff the new file with the old
4922 my $lnk = readlink($realfile);
4923 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4924 my $oldtype = $main::locked_file_type{$realfile};
4925 my $new = !defined($main::locked_file_data{$realfile});
4926 if ($new && !-e _) {
4927 # file doesn't exist, and never did! do nothing ..
4929 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4930 # is (or was) a directory ..
4931 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4932 push(@main::locked_file_diff,
4933 { 'type' => 'mkdir', 'object' => $realfile });
4935 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4936 push(@main::locked_file_diff,
4937 { 'type' => 'rmdir', 'object' => $realfile });
4940 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4941 # is (or was) a symlink ..
4942 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4943 push(@main::locked_file_diff,
4944 { 'type' => 'symlink', 'object' => $realfile,
4947 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4948 push(@main::locked_file_diff,
4949 { 'type' => 'unsymlink', 'object' => $realfile,
4950 'data' => $main::locked_file_data{$realfile} });
4952 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4953 push(@main::locked_file_diff,
4954 { 'type' => 'resymlink', 'object' => $realfile,
4959 # is a file, or has changed type?!
4960 my ($diff, $delete_file);
4961 my $type = "modify";
4963 open(NEWFILE, ">$realfile");
4968 if (!defined($main::locked_file_data{$realfile})) {
4971 open(ORIGFILE, ">$realfile.webminorig");
4972 print ORIGFILE $main::locked_file_data{$realfile};
4974 $diff = &backquote_command(
4975 "diff ".quotemeta("$realfile.webminorig")." ".
4976 quotemeta($realfile)." 2>/dev/null");
4977 push(@main::locked_file_diff,
4978 { 'type' => $type, 'object' => $realfile,
4979 'data' => $diff } ) if ($diff);
4980 unlink("$realfile.webminorig");
4981 unlink($realfile) if ($delete_file);
4984 if ($gconfig{'logfullfiles'}) {
4985 # Add file details to list of those to fully log
4986 $main::orig_file_data{$realfile} ||=
4987 $main::locked_file_data{$realfile};
4988 $main::orig_file_type{$realfile} ||=
4989 $main::locked_file_type{$realfile};
4992 delete($main::locked_file_data{$realfile});
4993 delete($main::locked_file_type{$realfile});
4997 =head2 test_lock(file)
4999 Returns 1 if some file is currently locked, 0 if not.
5004 my $realfile = &translate_filename($_[0]);
5005 return 0 if (!$_[0]);
5006 return 1 if (defined($main::locked_file_list{$realfile}));
5007 return 0 if (!&can_lock_file($realfile));
5009 if (open(LOCKING, "$realfile.lock")) {
5014 return $pid && kill(0, $pid);
5017 =head2 unlock_all_files
5019 Unlocks all files locked by the current script.
5022 sub unlock_all_files
5024 foreach $f (keys %main::locked_file_list) {
5029 =head2 can_lock_file(file)
5031 Returns 1 if some file should be locked, based on the settings in the
5032 Webmin Configuration module. For internal use by lock_file only.
5037 if (&is_readonly_mode()) {
5038 return 0; # never lock in read-only mode
5040 elsif ($gconfig{'lockmode'} == 0) {
5043 elsif ($gconfig{'lockmode'} == 1) {
5047 # Check if under any of the directories
5049 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
5050 if (&same_file($d, $_[0]) ||
5051 &is_under_directory($d, $_[0])) {
5055 return $gconfig{'lockmode'} == 2 ? $match : !$match;
5059 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
5061 Log some action taken by a user. This is typically called at the end of a
5062 script, once all file changes are complete and all commands run. The
5065 =item action - A short code for the action being performed, like 'create'.
5067 =item type - A code for the type of object the action is performed to, like 'user'.
5069 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
5071 =item params - A hash ref of additional information about the action.
5073 =item module - Name of the module in which the action was performed, which defaults to the current module.
5075 =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.
5077 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
5079 =item client-ip - IP address of the browser that performed the action.
5084 return if (!$gconfig{'log'} || &is_readonly_mode());
5085 my $m = $_[4] ? $_[4] : &get_module_name();
5087 if ($gconfig{'logclear'}) {
5088 # check if it is time to clear the log
5089 my @st = stat("$webmin_logfile.time");
5090 my $write_logtime = 0;
5092 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
5093 # clear logfile and all diff files
5094 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
5095 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
5096 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
5097 unlink($webmin_logfile);
5104 if ($write_logtime) {
5105 open(LOGTIME, ">$webmin_logfile.time");
5106 print LOGTIME time(),"\n";
5111 # If an action script directory is defined, call the appropriate scripts
5112 if ($gconfig{'action_script_dir'}) {
5113 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
5114 my ($basedir) = $gconfig{'action_script_dir'};
5116 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
5119 opendir(DIR, $dir) or die "Can't open $dir: $!";
5120 while (defined($file = readdir(DIR))) {
5121 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
5122 if (-x "$dir/$file") {
5123 # Call a script notifying it of the action
5125 $ENV{'ACTION_MODULE'} = &get_module_name();
5126 $ENV{'ACTION_ACTION'} = $_[0];
5127 $ENV{'ACTION_TYPE'} = $_[1];
5128 $ENV{'ACTION_OBJECT'} = $_[2];
5129 $ENV{'ACTION_SCRIPT'} = $script_name;
5130 foreach my $p (keys %param) {
5131 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5133 system("$dir/$file", @_,
5134 "<$null_file", ">$null_file", "2>&1");
5142 # should logging be done at all?
5143 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5144 split(/\s+/, $gconfig{'logusers'})) < 0);
5145 return if ($gconfig{'logmodules'} && &indexof($m,
5146 split(/\s+/, $gconfig{'logmodules'})) < 0);
5150 my @tm = localtime($now);
5151 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5152 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5153 $main::action_id_count++;
5154 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5155 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5156 $tm[2], $tm[1], $tm[0],
5157 $remote_user || '-',
5158 $main::session_id || '-',
5159 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5160 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5161 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5163 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5164 my $v = $_[3]->{$k};
5170 elsif (ref($v) eq 'ARRAY') {
5174 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5175 $line .= " $k='$vv'";
5179 foreach $vv (split(/\0/, $v)) {
5181 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5182 $line .= " $k='$vv'";
5185 $param{$k} = join(" ", @pv);
5187 open(WEBMINLOG, ">>$webmin_logfile");
5188 print WEBMINLOG $line,"\n";
5190 if ($gconfig{'logperms'}) {
5191 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5194 chmod(0600, $webmin_logfile);
5197 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5198 # Find and record the changes made to any locked files, or commands run
5200 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5201 foreach my $d (@main::locked_file_diff) {
5202 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
5203 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
5204 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5205 print DIFFLOG $d->{'data'};
5207 if ($d->{'input'}) {
5208 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5209 print DIFFLOG $d->{'input'};
5212 if ($gconfig{'logperms'}) {
5213 chmod(oct($gconfig{'logperms'}),
5214 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
5215 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5219 @main::locked_file_diff = undef;
5222 if ($gconfig{'logfullfiles'}) {
5223 # Save the original contents of any modified files
5225 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5226 foreach my $f (keys %main::orig_file_data) {
5227 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
5228 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
5229 if (!defined($main::orig_file_type{$f})) {
5230 print ORIGLOG -1," ",$f,"\n";
5233 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5235 print ORIGLOG $main::orig_file_data{$f};
5237 if ($gconfig{'logperms'}) {
5238 chmod(oct($gconfig{'logperms'}),
5239 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
5243 %main::orig_file_data = undef;
5244 %main::orig_file_type = undef;
5247 if ($miniserv::page_capture_out) {
5248 # Save the whole page output
5249 mkdir("$ENV{'WEBMIN_VAR'}/output", 0700);
5250 open(PAGEOUT, ">$ENV{'WEBMIN_VAR'}/output/$id");
5251 print PAGEOUT $miniserv::page_capture_out;
5253 if ($gconfig{'logperms'}) {
5254 chmod(oct($gconfig{'logperms'}),
5255 "$ENV{'WEBMIN_VAR'}/output/$id");
5257 $miniserv::page_capture_out = undef;
5261 if ($gconfig{'logsyslog'}) {
5262 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5263 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5264 setlogsock("inet");';
5266 # Syslog module is installed .. try to convert to a
5267 # human-readable form
5269 my $mod = &get_module_name();
5270 my $mdir = module_root_directory($mod);
5271 if (-r "$mdir/log_parser.pl") {
5272 &foreign_require($mod, "log_parser.pl");
5274 foreach my $k (keys %{$_[3]}) {
5275 my $v = $_[3]->{$k};
5276 if (ref($v) eq 'ARRAY') {
5277 $params{$k} = join("\0", @$v);
5283 $msg = &foreign_call($mod, "parse_webmin_log",
5284 $remote_user, $script_name,
5285 $_[0], $_[1], $_[2], \%params);
5286 $msg =~ s/<[^>]*>//g; # Remove tags
5288 elsif ($_[0] eq "_config_") {
5289 my %wtext = &load_language("webminlog");
5290 $msg = $wtext{'search_config'};
5292 $msg ||= "$_[0] $_[1] $_[2]";
5293 my %info = &get_module_info($m);
5294 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5299 =head2 additional_log(type, object, data, [input])
5301 Records additional log data for an upcoming call to webmin_log, such
5302 as a command that was run or SQL that was executed. Typically you will never
5303 need to call this function directory.
5308 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5309 push(@main::locked_file_diff,
5310 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5311 'input' => $_[3] } );
5315 =head2 webmin_debug_log(type, message)
5317 Write something to the Webmin debug log. For internal use only.
5320 sub webmin_debug_log
5322 my ($type, $msg) = @_;
5323 return 0 if (!$main::opened_debug_log);
5324 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5325 if ($gconfig{'debug_modules'}) {
5326 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5327 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5330 eval 'use Time::HiRes qw(gettimeofday); ($now, $ms) = gettimeofday';
5332 my @tm = localtime($now);
5334 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d.%6.6d] %s %s %s %s \"%s\"",
5335 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5336 $tm[2], $tm[1], $tm[0], $ms,
5337 $remote_user || "-",
5338 $ENV{'REMOTE_HOST'} || "-",
5339 &get_module_name() || "-",
5342 seek(main::DEBUGLOG, 0, 2);
5343 print main::DEBUGLOG $line."\n";
5347 =head2 system_logged(command)
5349 Just calls the Perl system() function, but also logs the command run.
5354 if (&is_readonly_mode()) {
5355 print STDERR "Vetoing command $_[0]\n";
5358 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5359 my $cmd = join(" ", @realcmd);
5361 if ($cmd =~ s/(\s*&\s*)$//) {
5364 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5365 $cmd =~ s/^\((.*)\)\s*$/$1/;
5367 &additional_log('exec', undef, $cmd);
5368 return system(@realcmd);
5371 =head2 backquote_logged(command)
5373 Executes a command and returns the output (like `command`), but also logs it.
5376 sub backquote_logged
5378 if (&is_readonly_mode()) {
5380 print STDERR "Vetoing command $_[0]\n";
5383 my $realcmd = &translate_command($_[0]);
5386 if ($cmd =~ s/(\s*&\s*)$//) {
5389 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5390 $cmd =~ s/^\((.*)\)\s*$/$1/;
5392 &additional_log('exec', undef, $cmd);
5393 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5397 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5399 Runs some command, waiting at most the given number of seconds for it to
5400 complete, and returns the output. The maxlines parameter sets the number
5401 of lines of output to capture. The safe parameter should be set to 1 if the
5402 command is safe for read-only mode users to run.
5405 sub backquote_with_timeout
5407 my $realcmd = &translate_command($_[0]);
5408 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5409 if ($gconfig{'debug_what_cmd'});
5411 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5416 my $elapsed = time() - $start;
5417 last if ($elapsed > $_[1]);
5419 vec($rmask, fileno(OUT), 1) = 1;
5420 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5421 last if (!$sel || $sel < 0);
5423 last if (!defined($line));
5426 if ($_[3] && $linecount >= $_[3]) {
5431 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5435 return wantarray ? ($out, $timed_out) : $out;
5438 =head2 backquote_command(command, safe?)
5440 Executes a command and returns the output (like `command`), subject to
5441 command translation. The safe parameter should be set to 1 if the command
5442 is safe for read-only mode users to run.
5445 sub backquote_command
5447 if (&is_readonly_mode() && !$_[1]) {
5448 print STDERR "Vetoing command $_[0]\n";
5452 my $realcmd = &translate_command($_[0]);
5453 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5457 =head2 kill_logged(signal, pid, ...)
5459 Like Perl's built-in kill function, but also logs the fact that some process
5460 was killed. On Windows, falls back to calling process.exe to terminate a
5466 return scalar(@_)-1 if (&is_readonly_mode());
5467 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5468 if ($gconfig{'debug_what_procs'});
5469 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5470 if ($gconfig{'os_type'} eq 'windows') {
5471 # Emulate some kills with process.exe
5472 my $arg = $_[0] eq "KILL" ? "-k" :
5473 $_[0] eq "TERM" ? "-q" :
5474 $_[0] eq "STOP" ? "-s" :
5475 $_[0] eq "CONT" ? "-r" : undef;
5477 foreach my $p (@_[1..@_-1]) {
5479 $ok ||= kill($_[0], $p);
5482 &execute_command("process $arg $p");
5494 =head2 rename_logged(old, new)
5496 Re-names a file and logs the rename. If the old and new files are on different
5497 filesystems, calls mv or the Windows rename function to do the job.
5502 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5503 return &rename_file($_[0], $_[1]);
5506 =head2 rename_file(old, new)
5508 Renames a file or directory. If the old and new files are on different
5509 filesystems, calls mv or the Windows rename function to do the job.
5514 if (&is_readonly_mode()) {
5515 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5518 my $src = &translate_filename($_[0]);
5519 my $dst = &translate_filename($_[1]);
5520 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5521 if ($gconfig{'debug_what_ops'});
5522 my $ok = rename($src, $dst);
5523 if (!$ok && $! !~ /permission/i) {
5524 # Try the mv command, in case this is a cross-filesystem rename
5525 if ($gconfig{'os_type'} eq 'windows') {
5526 # Need to use rename
5527 my $out = &backquote_command("rename ".quotemeta($_[0]).
5528 " ".quotemeta($_[1])." 2>&1");
5530 $! = $out if (!$ok);
5534 my $out = &backquote_command("mv ".quotemeta($_[0]).
5535 " ".quotemeta($_[1])." 2>&1");
5537 $! = $out if (!$ok);
5543 =head2 symlink_logged(src, dest)
5545 Create a symlink, and logs it. Effectively does the same thing as the Perl
5552 my $rv = &symlink_file($_[0], $_[1]);
5553 &unlock_file($_[1]);
5557 =head2 symlink_file(src, dest)
5559 Creates a soft link, unless in read-only mode. Effectively does the same thing
5560 as the Perl symlink function.
5565 if (&is_readonly_mode()) {
5566 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5569 my $src = &translate_filename($_[0]);
5570 my $dst = &translate_filename($_[1]);
5571 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5572 if ($gconfig{'debug_what_ops'});
5573 return symlink($src, $dst);
5576 =head2 link_file(src, dest)
5578 Creates a hard link, unless in read-only mode. The existing new link file
5579 will be deleted if necessary. Effectively the same as Perl's link function.
5584 if (&is_readonly_mode()) {
5585 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5588 my $src = &translate_filename($_[0]);
5589 my $dst = &translate_filename($_[1]);
5590 &webmin_debug_log('LINK', "src=$src dst=$dst")
5591 if ($gconfig{'debug_what_ops'});
5592 unlink($dst); # make sure link works
5593 return link($src, $dst);
5596 =head2 make_dir(dir, perms, recursive)
5598 Creates a directory and sets permissions on it, unless in read-only mode.
5599 The perms parameter sets the octal permissions to apply, which unlike Perl's
5600 mkdir will really get set. The recursive flag can be set to 1 to have the
5601 function create parent directories too.
5606 my ($dir, $perms, $recur) = @_;
5607 if (&is_readonly_mode()) {
5608 print STDERR "Vetoing directory $dir\n";
5611 $dir = &translate_filename($dir);
5612 my $exists = -d $dir ? 1 : 0;
5613 return 1 if ($exists && $recur); # already exists
5614 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5615 my $rv = mkdir($dir, $perms);
5616 if (!$rv && $recur) {
5617 # Failed .. try mkdir -p
5618 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5619 my $ex = &execute_command("mkdir $param "."e_path($dir));
5625 chmod($perms, $dir);
5630 =head2 set_ownership_permissions(user, group, perms, file, ...)
5632 Sets the user, group owner and permissions on some files. The parameters are :
5634 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5636 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5638 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5640 =item file - One or more files or directories to modify.
5643 sub set_ownership_permissions
5645 my ($user, $group, $perms, @files) = @_;
5646 if (&is_readonly_mode()) {
5647 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5650 @files = map { &translate_filename($_) } @files;
5651 if ($gconfig{'debug_what_ops'}) {
5652 foreach my $f (@files) {
5653 &webmin_debug_log('PERMS',
5654 "file=$f user=$user group=$group perms=$perms");
5658 if (defined($user)) {
5659 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5661 if (defined($group)) {
5662 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5665 my @uinfo = getpwuid($uid);
5668 $rv = chown($uid, $gid, @files);
5670 if ($rv && defined($perms)) {
5671 $rv = chmod($perms, @files);
5676 =head2 unlink_logged(file, ...)
5678 Like Perl's unlink function, but locks the files beforehand and un-locks them
5679 after so that the deletion is logged by Webmin.
5685 foreach my $f (@_) {
5686 if (!&test_lock($f)) {
5691 my @rv = &unlink_file(@_);
5692 foreach my $f (@_) {
5697 return wantarray ? @rv : $rv[0];
5700 =head2 unlink_file(file, ...)
5702 Deletes some files or directories. Like Perl's unlink function, but also
5703 recursively deletes directories with the rm command if needed.
5708 return 1 if (&is_readonly_mode());
5711 foreach my $f (@_) {
5712 &unflush_file_lines($f);
5713 my $realf = &translate_filename($f);
5714 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5716 if (!rmdir($realf)) {
5718 if ($gconfig{'os_type'} eq 'windows') {
5719 # Call del and rmdir commands
5722 my $out = `del /q "$qm" 2>&1`;
5724 $out = `rmdir "$qm" 2>&1`;
5729 my $qm = quotemeta($realf);
5730 $out = `rm -rf $qm 2>&1`;
5739 if (!unlink($realf)) {
5745 return wantarray ? ($rv, $err) : $rv;
5748 =head2 copy_source_dest(source, dest)
5750 Copy some file or directory to a new location. Returns 1 on success, or 0
5751 on failure - also sets $! on failure. If the source is a directory, uses
5752 piped tar commands to copy a whole directory structure including permissions
5756 sub copy_source_dest
5758 return (1, undef) if (&is_readonly_mode());
5759 my ($src, $dst) = @_;
5762 &webmin_debug_log('COPY', "src=$src dst=$dst")
5763 if ($gconfig{'debug_what_ops'});
5764 if ($gconfig{'os_type'} eq 'windows') {
5765 # No tar or cp on windows, so need to use copy command
5769 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5772 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5780 # A directory .. need to copy with tar command
5781 my @st = stat($src);
5784 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5785 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5792 # Can just copy with cp
5793 my $out = &backquote_logged("cp -p ".quotemeta($src).
5794 " ".quotemeta($dst)." 2>&1");
5800 return wantarray ? ($ok, $err) : $ok;
5803 =head2 remote_session_name(host|&server)
5805 Generates a session ID for some server. For this server, this will always
5806 be an empty string. For a server object it will include the hostname and
5807 port and PID. For a server name, it will include the hostname and PID. For
5811 sub remote_session_name
5813 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5814 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5815 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5816 ref($_[0]) ? "" : "$_[0].$$";
5819 =head2 remote_foreign_require(server, module, file)
5821 Connects to rpc.cgi on a remote webmin server and have it open a session
5822 to a process that will actually do the require and run functions. This is the
5823 equivalent for foreign_require, but for a remote Webmin system. The server
5824 parameter can either be a hostname of a system registered in the Webmin
5825 Servers Index module, or a hash reference for a system from that module.
5828 sub remote_foreign_require
5830 my $call = { 'action' => 'require',
5833 my $sn = &remote_session_name($_[0]);
5834 if ($remote_session{$sn}) {
5835 $call->{'session'} = $remote_session{$sn};
5838 $call->{'newsession'} = 1;
5840 my $rv = &remote_rpc_call($_[0], $call);
5841 if ($rv->{'session'}) {
5842 $remote_session{$sn} = $rv->{'session'};
5843 $remote_session_server{$sn} = $_[0];
5847 =head2 remote_foreign_call(server, module, function, [arg]*)
5849 Call a function on a remote server. Must have been setup first with
5850 remote_foreign_require for the same server and module. Equivalent to
5851 foreign_call, but with the extra server parameter to specify the remote
5855 sub remote_foreign_call
5857 return undef if (&is_readonly_mode());
5858 my $sn = &remote_session_name($_[0]);
5859 return &remote_rpc_call($_[0], { 'action' => 'call',
5862 'session' => $remote_session{$sn},
5863 'args' => [ @_[3 .. $#_] ] } );
5866 =head2 remote_foreign_check(server, module, [api-only])
5868 Checks if some module is installed and supported on a remote server. Equivilant
5869 to foreign_check, but for the remote Webmin system specified by the server
5873 sub remote_foreign_check
5875 return &remote_rpc_call($_[0], { 'action' => 'check',
5880 =head2 remote_foreign_config(server, module)
5882 Gets the configuration for some module from a remote server, as a hash.
5883 Equivalent to foreign_config, but for a remote system.
5886 sub remote_foreign_config
5888 return &remote_rpc_call($_[0], { 'action' => 'config',
5889 'module' => $_[1] });
5892 =head2 remote_eval(server, module, code)
5894 Evaluates some perl code in the context of a module on a remote webmin server.
5895 The server parameter must be the hostname of a remote system, module must
5896 be a module directory name, and code a string of Perl code to run. This can
5897 only be called after remote_foreign_require for the same server and module.
5902 return undef if (&is_readonly_mode());
5903 my $sn = &remote_session_name($_[0]);
5904 return &remote_rpc_call($_[0], { 'action' => 'eval',
5907 'session' => $remote_session{$sn} });
5910 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5912 Transfers some local file to another server via Webmin's RPC protocol, and
5913 returns the resulting remote filename. If the remotefile parameter is given,
5914 that is the destination filename which will be used. Otherwise a randomly
5915 selected temporary filename will be used, and returned by the function.
5920 return undef if (&is_readonly_mode());
5922 my $sn = &remote_session_name($_[0]);
5923 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5924 # Copy data over TCP connection
5925 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5927 'name' => $_[3] } );
5929 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5930 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5931 return &$main::remote_error_handler("Failed to transfer file : $error")
5934 while(read(FILE, $got, 1024) > 0) {
5938 shutdown(TWRITE, 1);
5940 if ($error && $error !~ /^OK/) {
5941 # Got back an error!
5942 return &$main::remote_error_handler("Failed to transfer file : $error");
5948 # Just pass file contents as parameters
5950 while(read(FILE, $got, 1024) > 0) {
5954 return &remote_rpc_call($_[0], { 'action' => 'write',
5957 'session' => $remote_session{$sn} });
5961 =head2 remote_read(server, localfile, remotefile)
5963 Transfers a file from a remote server to this system, using Webmin's RPC
5964 protocol. The server parameter must be the hostname of a system registered
5965 in the Webmin Servers Index module, localfile is the destination path on this
5966 system, and remotefile is the file to fetch from the remote server.
5971 my $sn = &remote_session_name($_[0]);
5972 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5973 # Copy data over TCP connection
5974 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5975 'file' => $_[2] } );
5977 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5980 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5981 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5982 return &$main::remote_error_handler("Failed to transfer file : $error")
5985 open(FILE, ">$_[1]");
5986 while(read(TREAD, $got, 1024) > 0) {
5993 # Just get data as return value
5994 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5996 'session' => $remote_session{$sn} });
5997 open(FILE, ">$_[1]");
6003 =head2 remote_finished
6005 Close all remote sessions. This happens automatically after a while
6006 anyway, but this function should be called to clean things up faster.
6011 foreach my $sn (keys %remote_session) {
6012 my $server = $remote_session_server{$sn};
6013 &remote_rpc_call($server, { 'action' => 'quit',
6014 'session' => $remote_session{$sn} } );
6015 delete($remote_session{$sn});
6016 delete($remote_session_server{$sn});
6018 foreach my $fh (keys %fast_fh_cache) {
6020 delete($fast_fh_cache{$fh});
6024 =head2 remote_error_setup(&function)
6026 Sets a function to be called instead of &error when a remote RPC operation
6027 fails. Useful if you want to have more control over your remote operations.
6030 sub remote_error_setup
6032 $main::remote_error_handler = $_[0] || \&error;
6035 =head2 remote_rpc_call(server, &structure)
6037 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
6038 and then reads back a reply structure. This is mainly for internal use only,
6039 and is called by the other remote_* functions.
6045 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
6047 # Server structure was given
6049 $serv->{'user'} || $serv->{'id'} == 0 ||
6050 return &$main::remote_error_handler(
6051 "No Webmin login set for server");
6054 # lookup the server in the webmin servers module if needed
6055 if (!%main::remote_servers_cache) {
6056 &foreign_require("servers", "servers-lib.pl");
6057 foreach $s (&foreign_call("servers", "list_servers")) {
6058 $main::remote_servers_cache{$s->{'host'}} = $s;
6059 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
6062 $serv = $main::remote_servers_cache{$_[0]};
6063 $serv || return &$main::remote_error_handler(
6064 "No Webmin Servers entry for $_[0]");
6065 $serv->{'user'} || return &$main::remote_error_handler(
6066 "No login set for server $_[0]");
6068 my $ip = $serv->{'ip'} || $serv->{'host'};
6070 # Work out the username and password
6072 if ($serv->{'sameuser'}) {
6073 $user = $remote_user;
6074 defined($main::remote_pass) || return &$main::remote_error_handler(
6075 "Password for this server is not available");
6076 $pass = $main::remote_pass;
6079 $user = $serv->{'user'};
6080 $pass = $serv->{'pass'};
6083 if ($serv->{'fast'} || !$sn) {
6084 # Make TCP connection call to fastrpc.cgi
6085 if (!$fast_fh_cache{$sn} && $sn) {
6086 # Need to open the connection
6087 my $con = &make_http_connection(
6088 $ip, $serv->{'port'}, $serv->{'ssl'},
6089 "POST", "/fastrpc.cgi");
6090 return &$main::remote_error_handler(
6091 "Failed to connect to $serv->{'host'} : $con")
6093 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6094 &write_http_connection($con, "User-agent: Webmin\r\n");
6095 my $auth = &encode_base64("$user:$pass");
6097 &write_http_connection($con, "Authorization: basic $auth\r\n");
6098 &write_http_connection($con, "Content-length: ",
6099 length($tostr),"\r\n");
6100 &write_http_connection($con, "\r\n");
6101 &write_http_connection($con, $tostr);
6103 # read back the response
6104 my $line = &read_http_connection($con);
6105 $line =~ tr/\r\n//d;
6106 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6107 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6109 $line =~ /^HTTP\/1\..\s+200\s+/ ||
6110 return &$main::remote_error_handler("HTTP error : $line");
6112 $line = &read_http_connection($con);
6113 $line =~ tr/\r\n//d;
6115 $line = &read_http_connection($con);
6116 if ($line =~ /^0\s+(.*)/) {
6117 return &$main::remote_error_handler("RPC error : $1");
6119 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
6120 $line =~ /^1\s+(\S+)\s+(\S+)/) {
6121 # Started ok .. connect and save SID
6122 &close_http_connection($con);
6123 my ($port, $sid, $version, $error) = ($1, $2, $3);
6124 &open_socket($ip, $port, $sid, \$error);
6125 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
6127 $fast_fh_cache{$sn} = $sid;
6128 $remote_server_version{$sn} = $version;
6131 while($stuff = &read_http_connection($con)) {
6134 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
6137 elsif (!$fast_fh_cache{$sn}) {
6138 # Open the connection by running fastrpc.cgi locally
6139 pipe(RPCOUTr, RPCOUTw);
6143 open(STDOUT, ">&RPCOUTw");
6147 $ENV{'REQUEST_METHOD'} = 'GET';
6148 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6149 $ENV{'SERVER_ROOT'} ||= $root_directory;
6151 if ($base_remote_user ne 'root' &&
6152 $base_remote_user ne 'admin') {
6153 # Need to fake up a login for the CGI!
6154 &read_acl(undef, \%acl, [ 'root' ]);
6155 $ENV{'BASE_REMOTE_USER'} =
6156 $ENV{'REMOTE_USER'} =
6157 $acl{'root'} ? 'root' : 'admin';
6159 delete($ENV{'FOREIGN_MODULE_NAME'});
6160 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6161 chdir($root_directory);
6162 if (!exec("$root_directory/fastrpc.cgi")) {
6163 print "exec failed : $!\n";
6170 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6174 if ($line =~ /^0\s+(.*)/) {
6175 return &$main::remote_error_handler("RPC error : $2");
6177 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6178 # Started ok .. connect and save SID
6180 my ($port, $sid, $error) = ($1, $2, undef);
6181 &open_socket("localhost", $port, $sid, \$error);
6182 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6183 $fast_fh_cache{$sn} = $sid;
6190 &error("Bad response from fastrpc.cgi : $line");
6193 # Got a connection .. send off the request
6194 my $fh = $fast_fh_cache{$sn};
6195 my $tostr = &serialise_variable($_[1]);
6196 print $fh length($tostr)," $fh\n";
6198 my $rlen = int(<$fh>);
6199 my ($fromstr, $got);
6200 while(length($fromstr) < $rlen) {
6201 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
6202 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6205 my $from = &unserialise_variable($fromstr);
6207 # No response at all
6208 return &$main::remote_error_handler("Remote Webmin error");
6210 elsif (ref($from) ne 'HASH') {
6212 return &$main::remote_error_handler(
6213 "Invalid remote Webmin response : $from");
6215 elsif (!$from->{'status'}) {
6217 $from->{'rv'} =~ s/\s+at\s+(\S+)\s+line\s+(\d+)(,\s+<\S+>\s+line\s+(\d+))?//;
6218 return &$main::remote_error_handler($from->{'rv'});
6220 if (defined($from->{'arv'})) {
6221 return @{$from->{'arv'}};
6224 return $from->{'rv'};
6228 # Call rpc.cgi on remote server
6229 my $tostr = &serialise_variable($_[1]);
6231 my $con = &make_http_connection($ip, $serv->{'port'},
6232 $serv->{'ssl'}, "POST", "/rpc.cgi");
6233 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6235 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6236 &write_http_connection($con, "User-agent: Webmin\r\n");
6237 my $auth = &encode_base64("$user:$pass");
6239 &write_http_connection($con, "Authorization: basic $auth\r\n");
6240 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6241 &write_http_connection($con, "\r\n");
6242 &write_http_connection($con, $tostr);
6244 # read back the response
6245 my $line = &read_http_connection($con);
6246 $line =~ tr/\r\n//d;
6247 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6248 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6250 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6252 $line = &read_http_connection($con);
6253 $line =~ tr/\r\n//d;
6256 while($line = &read_http_connection($con)) {
6260 my $from = &unserialise_variable($fromstr);
6261 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6262 if (defined($from->{'arv'})) {
6263 return @{$from->{'arv'}};
6266 return $from->{'rv'};
6271 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6273 Executes some function in parallel on multiple servers at once. Fills in
6274 the returns and errors arrays respectively. If the module and library
6275 parameters are given, that module is remotely required on the server first,
6276 to check if it is connectable. The parameters are :
6278 =item servers - A list of Webmin system hash references.
6280 =item parallel - Number of parallel operations to perform.
6282 =item function - Reference to function to call for each system.
6284 =item args - Additional parameters to the function.
6286 =item returns - Array ref to place return values into, in same order as servers.
6288 =item errors - Array ref to place error messages into.
6290 =item module - Optional module to require on the remote system first.
6292 =item library - Optional library to require in the module.
6295 sub remote_multi_callback
6297 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6298 &remote_error_setup(\&remote_multi_callback_error);
6300 # Call the functions
6302 foreach my $g (@$servs) {
6308 $remote_multi_callback_err = undef;
6310 # Require the remote lib
6311 &remote_foreign_require($g->{'host'}, $mod, $lib);
6312 if ($remote_multi_callback_err) {
6313 # Failed .. return error
6314 print $wh &serialise_variable(
6315 [ undef, $remote_multi_callback_err ]);
6321 my $a = ref($args) ? $args->[$p] : $args;
6322 my $rv = &$func($g, $a);
6325 print $wh &serialise_variable(
6326 [ $rv, $remote_multi_callback_err ]);
6334 # Read back the results
6336 foreach my $g (@$servs) {
6340 $errs->[$p] = "Failed to read response from $g->{'host'}";
6343 my $rv = &unserialise_variable($line);
6345 $rets->[$p] = $rv->[0];
6346 $errs->[$p] = $rv->[1];
6351 &remote_error_setup(undef);
6354 sub remote_multi_callback_error
6356 $remote_multi_callback_err = $_[0];
6359 =head2 serialise_variable(variable)
6361 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6362 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6363 called on each member to serialize the entire object.
6366 sub serialise_variable
6368 if (!defined($_[0])) {
6374 $rv = &urlize($_[0]);
6376 elsif ($r eq 'SCALAR') {
6377 $rv = &urlize(${$_[0]});
6379 elsif ($r eq 'ARRAY') {
6380 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6382 elsif ($r eq 'HASH') {
6383 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6384 &urlize(&serialise_variable($_[0]->{$_})) }
6387 elsif ($r eq 'REF') {
6388 $rv = &serialise_variable(${$_[0]});
6390 elsif ($r eq 'CODE') {
6395 # An object - treat as a hash
6396 $r = "OBJECT ".&urlize($r);
6397 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6398 &urlize(&serialise_variable($_[0]->{$_})) }
6401 return ($r ? $r : 'VAL').",".$rv;
6404 =head2 unserialise_variable(string)
6406 Converts a string created by serialise_variable() back into the original
6407 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6408 object, the same class is used on this system, if available.
6411 sub unserialise_variable
6413 my @v = split(/,/, $_[0]);
6415 if ($v[0] eq 'VAL') {
6416 @v = split(/,/, $_[0], -1);
6417 $rv = &un_urlize($v[1]);
6419 elsif ($v[0] eq 'SCALAR') {
6420 local $r = &un_urlize($v[1]);
6423 elsif ($v[0] eq 'ARRAY') {
6425 for(my $i=1; $i<@v; $i++) {
6426 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6429 elsif ($v[0] eq 'HASH') {
6431 for(my $i=1; $i<@v; $i+=2) {
6432 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6433 &unserialise_variable(&un_urlize($v[$i+1]));
6436 elsif ($v[0] eq 'REF') {
6437 local $r = &unserialise_variable($v[1]);
6440 elsif ($v[0] eq 'UNDEF') {
6443 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6444 # An object hash that we have to re-bless
6447 for(my $i=1; $i<@v; $i+=2) {
6448 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6449 &unserialise_variable(&un_urlize($v[$i+1]));
6457 =head2 other_groups(user)
6459 Returns a list of secondary groups a user is a member of, as a list of
6468 while(my @g = getgrent()) {
6469 my @m = split(/\s+/, $g[3]);
6470 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6472 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6476 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6478 Returns HTML for a button that pops up a data chooser window. The parameters
6481 =item dayfield - Name of the text field to place the day of the month into.
6483 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6485 =item yearfield - Name of the text field to place the year into.
6488 sub date_chooser_button
6490 return &theme_date_chooser_button(@_)
6491 if (defined(&theme_date_chooser_button));
6492 my ($w, $h) = (250, 225);
6493 if ($gconfig{'db_sizedate'}) {
6494 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6496 return "<input type=button onClick='window.dfield = form.$_[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";
6499 =head2 help_file(module, file)
6501 Returns the path to a module's help file of some name, typically under the
6502 help directory with a .html extension.
6507 my $mdir = &module_root_directory($_[0]);
6508 my $dir = "$mdir/help";
6509 foreach my $o (@lang_order_list) {
6510 my $lang = "$dir/$_[1].$o.html";
6511 return $lang if (-r $lang);
6513 return "$dir/$_[1].html";
6518 Seeds the random number generator, if not already done in this script. On Linux
6519 this makes use of the current time, process ID and a read from /dev/urandom.
6520 On other systems, only the current time and process ID are used.
6525 if (!$main::done_seed_random) {
6526 if (open(RANDOM, "/dev/urandom")) {
6528 read(RANDOM, $buf, 4);
6530 srand(time() ^ $$ ^ $buf);
6535 $main::done_seed_random = 1;
6539 =head2 disk_usage_kb(directory)
6541 Returns the number of kB used by some directory and all subdirs. Implemented
6542 by calling the C<du -k> command.
6547 my $dir = &translate_filename($_[0]);
6549 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6551 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6553 return $out =~ /^([0-9]+)/ ? $1 : "???";
6556 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6558 Returns the number of bytes taken up by all files in some directory and all
6559 sub-directories, by summing up their lengths. The disk_usage_kb is more
6560 reflective of reality, as the filesystem typically pads file sizes to 1k or
6564 sub recursive_disk_usage
6566 my $dir = &translate_filename($_[0]);
6573 my @st = stat($dir);
6579 my @files = readdir(DIR);
6581 foreach my $f (@files) {
6582 next if ($f eq "." || $f eq "..");
6583 next if ($skip && $f =~ /$skip/);
6584 next if ($only && $f !~ /$only/);
6585 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6591 =head2 help_search_link(term, [ section, ... ] )
6593 Returns HTML for a link to the man module for searching local and online
6594 docs for various search terms. The term parameter can either be a single
6595 word like 'bind', or a space-separated list of words. This function is typically
6596 used by modules that want to refer users to additional documentation in man
6597 pages or local system doc files.
6600 sub help_search_link
6602 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6603 my $for = &urlize(shift(@_));
6604 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6605 join("&", map { "section=$_" } @_)."&".
6606 "for=$for&exact=1&check=".&get_module_name()."'>".
6607 $text{'helpsearch'}."</a>\n";
6614 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6616 Opens a connection to some HTTP server, maybe through a proxy, and returns
6617 a handle object. The handle can then be used to send additional headers
6618 and read back a response. If anything goes wrong, returns an error string.
6619 The parameters are :
6621 =item host - Hostname or IP address of the webserver to connect to.
6623 =item port - HTTP port number to connect to.
6625 =item ssl - Set to 1 to connect in SSL mode.
6627 =item method - HTTP method, like GET or POST.
6629 =item page - Page to request on the webserver, like /foo/index.html
6631 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6634 sub make_http_connection
6636 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6639 foreach my $h (@$headers) {
6640 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6644 if (&is_readonly_mode()) {
6645 return "HTTP connections not allowed in readonly mode";
6647 my $rv = { 'fh' => time().$$ };
6650 eval "use Net::SSLeay";
6651 $@ && return $text{'link_essl'};
6652 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6653 eval "Net::SSLeay::load_error_strings()";
6654 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6655 return "Failed to create SSL context";
6656 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6657 return "Failed to create SSL connection";
6659 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6660 !&no_proxy($host)) {
6663 &open_socket($1, $2, $rv->{'fh'}, \$error);
6666 my $fh = $rv->{'fh'};
6667 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6668 if ($gconfig{'proxy_user'}) {
6669 my $auth = &encode_base64(
6670 "$gconfig{'proxy_user'}:".
6671 "$gconfig{'proxy_pass'}");
6672 $auth =~ tr/\r\n//d;
6673 print $fh "Proxy-Authorization: Basic $auth\r\n";
6677 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6678 return "Proxy error : $3" if ($2 != 200);
6681 return "Proxy error : $line";
6686 elsif (!$gconfig{'proxy_fallback'}) {
6687 # Connection to proxy failed - give up
6694 &open_socket($host, $port, $rv->{'fh'}, \$error);
6695 return $error if ($error);
6697 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6698 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6699 return "SSL connect() failed";
6700 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6701 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6704 # Plain HTTP request
6706 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6707 !&no_proxy($host)) {
6710 &open_socket($1, $2, $rv->{'fh'}, \$error);
6714 my $fh = $rv->{'fh'};
6715 my $rtxt = $method." ".
6716 "http://$host:$port$page HTTP/1.0\r\n";
6717 if ($gconfig{'proxy_user'}) {
6718 my $auth = &encode_base64(
6719 "$gconfig{'proxy_user'}:".
6720 "$gconfig{'proxy_pass'}");
6721 $auth =~ tr/\r\n//d;
6722 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6727 elsif (!$gconfig{'proxy_fallback'}) {
6732 # Connecting directly
6734 &open_socket($host, $port, $rv->{'fh'}, \$error);
6735 return $error if ($error);
6736 my $fh = $rv->{'fh'};
6737 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6744 =head2 read_http_connection(&handle, [bytes])
6746 Reads either one line or up to the specified number of bytes from the handle,
6747 originally supplied by make_http_connection.
6750 sub read_http_connection
6754 if ($h->{'ssl_con'}) {
6757 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6758 # need to read more..
6759 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6761 $rv = $h->{'buffer'};
6762 delete($h->{'buffer'});
6765 $h->{'buffer'} .= $more;
6767 $rv = substr($h->{'buffer'}, 0, $idx+1);
6768 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6771 if (length($h->{'buffer'})) {
6772 $rv = $h->{'buffer'};
6773 delete($h->{'buffer'});
6776 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6782 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6785 my $fh = $h->{'fh'};
6789 $rv = undef if ($rv eq "");
6793 =head2 write_http_connection(&handle, [data+])
6795 Writes the given data to the given HTTP connection handle.
6798 sub write_http_connection
6801 my $fh = $h->{'fh'};
6803 if ($h->{'ssl_ctx'}) {
6804 foreach my $s (@_) {
6805 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6806 $allok = 0 if (!$ok);
6810 my $ok = (print $fh @_);
6811 $allok = 0 if (!$ok);
6816 =head2 close_http_connection(&handle)
6818 Closes a connection to an HTTP server, identified by the given handle.
6821 sub close_http_connection
6827 =head2 clean_environment
6829 Deletes any environment variables inherited from miniserv so that they
6830 won't be passed to programs started by webmin. This is useful when calling
6831 programs that check for CGI-related environment variables and modify their
6832 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6835 sub clean_environment
6837 %UNCLEAN_ENV = %ENV;
6838 foreach my $k (keys %ENV) {
6839 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6843 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6844 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6845 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6846 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6847 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6848 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6849 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6850 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6856 =head2 reset_environment
6858 Puts the environment back how it was before clean_environment was callled.
6861 sub reset_environment
6864 foreach my $k (keys %UNCLEAN_ENV) {
6865 $ENV{$k} = $UNCLEAN_ENV{$k};
6867 undef(%UNCLEAN_ENV);
6871 =head2 progress_callback
6873 Never called directly, but useful for passing to &http_download to print
6874 out progress of an HTTP request.
6877 sub progress_callback
6879 if (defined(&theme_progress_callback)) {
6880 # Call the theme override
6881 return &theme_progress_callback(@_);
6885 print $progress_callback_prefix;
6887 $progress_size = $_[1];
6888 $progress_step = int($_[1] / 10);
6889 print &text('progress_size2', $progress_callback_url,
6890 &nice_size($progress_size)),"<br>\n";
6893 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6895 $last_progress_time = $last_progress_size = undef;
6897 elsif ($_[0] == 3) {
6899 my $sp = $progress_callback_prefix.(" " x 5);
6900 if ($progress_size) {
6901 # And we have a size to compare against
6902 my $st = int(($_[1] * 10) / $progress_size);
6903 my $time_now = time();
6904 if ($st != $progress_step ||
6905 $time_now - $last_progress_time > 60) {
6906 # Show progress every 10% or 60 seconds
6907 print $sp,&text('progress_datan', &nice_size($_[1]),
6908 int($_[1]*100/$progress_size)),"<br>\n";
6909 $last_progress_time = $time_now;
6911 $progress_step = $st;
6914 # No total size .. so only show in 100k jumps
6915 if ($_[1] > $last_progress_size+100*1024) {
6916 print $sp,&text('progress_data2n',
6917 &nice_size($_[1])),"<br>\n";
6918 $last_progress_size = $_[1];
6922 elsif ($_[0] == 4) {
6923 # All done downloading
6924 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6926 elsif ($_[0] == 5) {
6927 # Got new location after redirect
6928 $progress_callback_url = $_[1];
6930 elsif ($_[0] == 6) {
6932 $progress_callback_url = $_[1];
6933 print &text('progress_incache', $progress_callback_url),"<br>\n";
6937 =head2 switch_to_remote_user
6939 Changes the user and group of the current process to that of the unix user
6940 with the same name as the current webmin login, or fails if there is none.
6941 This should be called by Usermin module scripts that only need to run with
6942 limited permissions.
6945 sub switch_to_remote_user
6947 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6949 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6950 &create_missing_homedir(\@remote_user_info);
6952 &switch_to_unix_user(\@remote_user_info);
6953 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6954 $ENV{'HOME'} = $remote_user_info[7];
6956 # Export global variables to caller
6957 if ($main::export_to_caller) {
6958 my ($callpkg) = caller();
6959 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6963 =head2 switch_to_unix_user(&user-details)
6965 Switches the current process to the UID and group ID from the given list
6966 of user details, which must be in the format returned by getpwnam.
6969 sub switch_to_unix_user
6972 if (!defined($uinfo->[0])) {
6973 # No username given, so just use given GID
6974 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6977 # Use all groups from user
6978 ($(, $)) = ( $uinfo->[3],
6979 "$uinfo->[3] ".join(" ", $uinfo->[3],
6980 &other_groups($uinfo->[0])) );
6983 POSIX::setuid($uinfo->[2]);
6985 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6986 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6990 =head2 eval_as_unix_user(username, &code)
6992 Runs some code fragment with the effective UID and GID switch to that
6993 of the given Unix user, so that file IO takes place with his permissions.
6997 sub eval_as_unix_user
6999 my ($user, $code) = @_;
7000 my @uinfo = getpwnam($user);
7001 if (!scalar(@uinfo)) {
7002 &error("eval_as_unix_user called with invalid user $user");
7004 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
7008 local $main::error_must_die = 1;
7015 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
7018 return wantarray ? @rv : $rv[0];
7021 =head2 create_user_config_dirs
7023 Creates per-user config directories and sets $user_config_directory and
7024 $user_module_config_directory to them. Also reads per-user module configs
7025 into %userconfig. This should be called by Usermin module scripts that need
7026 to store per-user preferences or other settings.
7029 sub create_user_config_dirs
7031 return if (!$gconfig{'userconfig'});
7032 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
7033 return if (!@uinfo || !$uinfo[7]);
7034 &create_missing_homedir(\@uinfo);
7035 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
7036 if (!-d $user_config_directory) {
7037 mkdir($user_config_directory, 0700) ||
7038 &error("Failed to create $user_config_directory : $!");
7039 if ($< == 0 && $uinfo[2]) {
7040 chown($uinfo[2], $uinfo[3], $user_config_directory);
7043 if (&get_module_name()) {
7044 $user_module_config_directory = $user_config_directory."/".
7046 if (!-d $user_module_config_directory) {
7047 mkdir($user_module_config_directory, 0700) ||
7048 &error("Failed to create $user_module_config_directory : $!");
7049 if ($< == 0 && $uinfo[2]) {
7050 chown($uinfo[2], $uinfo[3], $user_config_directory);
7054 &read_file_cached("$module_root_directory/defaultuconfig",
7056 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
7057 &read_file_cached("$user_module_config_directory/config",
7061 # Export global variables to caller
7062 if ($main::export_to_caller) {
7063 my ($callpkg) = caller();
7064 foreach my $v ('$user_config_directory',
7065 '$user_module_config_directory', '%userconfig') {
7066 my ($vt, $vn) = split('', $v, 2);
7067 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
7072 =head2 create_missing_homedir(&uinfo)
7074 If auto homedir creation is enabled, create one for this user if needed.
7075 For internal use only.
7078 sub create_missing_homedir
7081 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
7082 # Use has no home dir .. make one
7083 system("mkdir -p ".quotemeta($uinfo->[7]));
7084 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
7085 if ($gconfig{'create_homedir_perms'} ne '') {
7086 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
7091 =head2 filter_javascript(text)
7093 Disables all javascript <script>, onClick= and so on tags in the given HTML,
7094 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
7097 sub filter_javascript
7100 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
7101 $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;
7102 $rv =~ s/(javascript:)/x$1/gi;
7103 $rv =~ s/(vbscript:)/x$1/gi;
7107 =head2 resolve_links(path)
7109 Given a path that may contain symbolic links, returns the real path.
7115 $path =~ s/\/+/\//g;
7116 $path =~ s/\/$// if ($path ne "/");
7117 my @p = split(/\/+/, $path);
7119 for(my $i=0; $i<@p; $i++) {
7120 my $sofar = "/".join("/", @p[0..$i]);
7121 my $lnk = readlink($sofar);
7122 if ($lnk eq $sofar) {
7123 # Link to itself! Cannot do anything more really ..
7126 elsif ($lnk =~ /^\//) {
7127 # Link is absolute..
7128 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
7132 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
7138 =head2 simplify_path(path, bogus)
7140 Given a path, maybe containing elements ".." and "." , convert it to a
7141 clean, absolute form. Returns undef if this is not possible.
7149 my @bits = split(/\/+/, $dir);
7152 foreach my $b (@bits) {
7156 elsif ($b eq "..") {
7158 if (scalar(@fixedbits) == 0) {
7159 # Cannot! Already at root!
7166 push(@fixedbits, $b);
7169 return "/".join('/', @fixedbits);
7172 =head2 same_file(file1, file2)
7174 Returns 1 if two files are actually the same
7179 return 1 if ($_[0] eq $_[1]);
7180 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7181 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7182 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7183 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7184 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7185 return 0 if (!@stat1 || !@stat2);
7186 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7189 =head2 flush_webmin_caches
7191 Clears all in-memory and on-disk caches used by Webmin.
7194 sub flush_webmin_caches
7196 undef(%main::read_file_cache);
7197 undef(%main::acl_hash_cache);
7198 undef(%main::acl_array_cache);
7199 undef(%main::has_command_cache);
7200 undef(@main::list_languages_cache);
7201 undef($main::got_list_usermods_cache);
7202 undef(@main::list_usermods_cache);
7203 undef(%main::foreign_installed_cache);
7204 unlink("$config_directory/module.infos.cache");
7205 &get_all_module_infos();
7208 =head2 list_usermods
7210 Returns a list of additional module restrictions. For internal use in
7216 if (!$main::got_list_usermods_cache) {
7217 @main::list_usermods_cache = ( );
7219 open(USERMODS, "$config_directory/usermin.mods");
7221 if (/^([^:]+):(\+|-|):(.*)/) {
7222 push(@main::list_usermods_cache,
7223 [ $1, $2, [ split(/\s+/, $3) ] ]);
7227 $main::got_list_usermods_cache = 1;
7229 return @main::list_usermods_cache;
7232 =head2 available_usermods(&allmods, &usermods)
7234 Returns a list of modules that are available to the given user, based
7235 on usermod additional/subtractions. For internal use by Usermin only.
7238 sub available_usermods
7240 return @{$_[0]} if (!@{$_[1]});
7242 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7243 my @uinfo = @remote_user_info;
7244 @uinfo = getpwnam($remote_user) if (!@uinfo);
7245 foreach my $u (@{$_[1]}) {
7247 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7250 elsif ($u->[0] =~ /^\@(.*)$/) {
7251 # Check for group membership
7252 my @ginfo = getgrnam($1);
7253 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7254 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7256 elsif ($u->[0] =~ /^\//) {
7257 # Check users and groups in file
7259 open(USERFILE, $u->[0]);
7262 if ($_ eq $remote_user) {
7265 elsif (/^\@(.*)$/) {
7266 my @ginfo = getgrnam($1);
7268 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7269 &indexof($remote_user,
7270 split(/\s+/, $ginfo[3])) >= 0));
7277 if ($u->[1] eq "+") {
7278 map { $mods{$_}++ } @{$u->[2]};
7280 elsif ($u->[1] eq "-") {
7281 map { delete($mods{$_}) } @{$u->[2]};
7285 map { $mods{$_}++ } @{$u->[2]};
7289 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7292 =head2 get_available_module_infos(nocache)
7294 Returns a list of modules available to the current user, based on
7295 operating system support, access control and usermod restrictions. Useful
7296 in themes that need to display a list of modules the user can use.
7297 Each element of the returned array is a hash reference in the same format as
7298 returned by get_module_info.
7301 sub get_available_module_infos
7304 &read_acl(\%acl, \%uacl, [ $base_remote_user ]);
7305 my $risk = $gconfig{'risk_'.$base_remote_user};
7307 foreach my $minfo (&get_all_module_infos($_[0])) {
7308 next if (!&check_os_support($minfo));
7310 # Check module risk level
7311 next if ($risk ne 'high' && $minfo->{'risk'} &&
7312 $minfo->{'risk'} !~ /$risk/);
7316 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7317 !$acl{$base_remote_user,"*"});
7319 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7323 # Check usermod restrictions
7324 my @usermods = &list_usermods();
7325 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7326 &available_usermods(\@rv, \@usermods);
7328 # Check RBAC restrictions
7330 foreach my $m (@rv) {
7331 if (&supports_rbac($m->{'dir'}) &&
7332 &use_rbac_module_acl(undef, $m->{'dir'})) {
7333 local $rbacs = &get_rbac_module_acl($remote_user,
7341 # Module or system doesn't support RBAC
7342 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7348 if (defined(&theme_foreign_available)) {
7349 foreach my $m (@rbacrv) {
7350 if (&theme_foreign_available($m->{'dir'})) {
7359 # Check licence module vetos
7361 if ($main::licence_module) {
7362 foreach my $m (@themerv) {
7363 if (&foreign_call($main::licence_module,
7364 "check_module_licence", $m->{'dir'})) {
7376 =head2 get_visible_module_infos(nocache)
7378 Like get_available_module_infos, but excludes hidden modules from the list.
7379 Each element of the returned array is a hash reference in the same format as
7380 returned by get_module_info.
7383 sub get_visible_module_infos
7386 my $pn = &get_product_name();
7387 return grep { !$_->{'hidden'} &&
7388 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7391 =head2 get_visible_modules_categories(nocache)
7393 Returns a list of Webmin module categories, each of which is a hash ref
7394 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7395 of modules in the category, in the format returned by get_module_info.
7396 Un-used modules are automatically assigned to the 'unused' category, and
7397 those with no category are put into 'others'.
7400 sub get_visible_modules_categories
7403 my @mods = &get_visible_module_infos($nocache);
7405 if (&get_product_name() eq 'webmin') {
7406 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7407 @mods = grep { $_->{'installed'} ne '0' } @mods;
7409 my %cats = &list_categories(\@mods);
7411 foreach my $c (keys %cats) {
7412 my $cat = { 'code' => $c || 'other',
7413 'desc' => $cats{$c} };
7414 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7417 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7418 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7420 # Add un-installed modules in magic category
7421 my $cat = { 'code' => 'unused',
7422 'desc' => $text{'main_unused'},
7424 'modules' => \@unmods };
7430 =head2 is_under_directory(directory, file)
7432 Returns 1 if the given file is under the specified directory, 0 if not.
7433 Symlinks are taken into account in the file to find it's 'real' location.
7436 sub is_under_directory
7438 my ($dir, $file) = @_;
7439 return 1 if ($dir eq "/");
7440 return 0 if ($file =~ /\.\./);
7441 my $ld = &resolve_links($dir);
7443 return &is_under_directory($ld, $file);
7445 my $lp = &resolve_links($file);
7447 return &is_under_directory($dir, $lp);
7449 return 0 if (length($file) < length($dir));
7450 return 1 if ($dir eq $file);
7452 return substr($file, 0, length($dir)) eq $dir;
7455 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7457 Given an absolute URL, returns the host, port, page and ssl flag components.
7458 If a username and password are given before the hostname, return those too.
7459 Relative URLs can also be parsed, if the base information is provided.
7464 if ($_[0] =~ /^(http|https):\/\/([^\@]+\@)?\[([^\]]+)\](:(\d+))?(\/\S*)?$/ ||
7465 $_[0] =~ /^(http|https):\/\/([^\@]+\@)?([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7467 my $ssl = $1 eq 'https';
7468 my @rv = ($3, $4 ? $5 : $ssl ? 443 : 80, $6 || "/", $ssl);
7469 if ($2 =~ /^([^:]+):(\S+)\@/) {
7478 elsif ($_[0] =~ /^\/\S*$/) {
7479 # A relative to the server URL
7480 return ($_[1], $_[2], $_[0], $_[4], $_[5], $_[6]);
7483 # A relative to the directory URL
7485 $page =~ s/[^\/]+$//;
7486 return ($_[1], $_[2], $page.$_[0], $_[4], $_[5], $_[6]);
7490 =head2 check_clicks_function
7492 Returns HTML for a JavaScript function called check_clicks that returns
7493 true when first called, but false subsequently. Useful on onClick for
7494 critical buttons. Deprecated, as this method of preventing duplicate actions
7498 sub check_clicks_function
7503 function check_clicks(form)
7510 for(i=0; i<form.length; i++)
7511 form.elements[i].disabled = true;
7520 =head2 load_entities_map
7522 Returns a hash ref containing mappings between HTML entities (like ouml) and
7523 ascii values (like 246). Mainly for internal use.
7526 sub load_entities_map
7528 if (!%entities_map_cache) {
7530 open(EMAP, "$root_directory/entities_map.txt");
7532 if (/^(\d+)\s+(\S+)/) {
7533 $entities_map_cache{$2} = $1;
7538 return \%entities_map_cache;
7541 =head2 entities_to_ascii(string)
7543 Given a string containing HTML entities like ö and 7, replace them
7544 with their ASCII equivalents.
7547 sub entities_to_ascii
7550 my $emap = &load_entities_map();
7551 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7552 $str =~ s/&#(\d+);/chr($1)/ge;
7556 =head2 get_product_name
7558 Returns either 'webmin' or 'usermin', depending on which program the current
7559 module is in. Useful for modules that can be installed into either.
7562 sub get_product_name
7564 return $gconfig{'product'} if (defined($gconfig{'product'}));
7565 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7570 Returns the character set for the current language, such as iso-8859-1.
7575 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7576 $current_lang_info->{'charset'} ?
7577 $current_lang_info->{'charset'} : $default_charset;
7581 =head2 get_display_hostname
7583 Returns the system's hostname for UI display purposes. This may be different
7584 from the actual hostname if you administrator has configured it so in the
7585 Webmin Configuration module.
7588 sub get_display_hostname
7590 if ($gconfig{'hostnamemode'} == 0) {
7591 return &get_system_hostname();
7593 elsif ($gconfig{'hostnamemode'} == 3) {
7594 return $gconfig{'hostnamedisplay'};
7597 my $h = $ENV{'HTTP_HOST'};
7599 if ($gconfig{'hostnamemode'} == 2) {
7600 $h =~ s/^(www|ftp|mail)\.//i;
7606 =head2 save_module_config([&config], [modulename])
7608 Saves the configuration for some module. The config parameter is an optional
7609 hash reference of names and values to save, which defaults to the global
7610 %config hash. The modulename parameter is the module to update the config
7611 file, which defaults to the current module.
7614 sub save_module_config
7616 my $c = $_[0] || { &get_module_variable('%config') };
7617 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7618 &write_file("$config_directory/$m/config", $c);
7621 =head2 save_user_module_config([&config], [modulename])
7623 Saves the user's Usermin preferences for some module. The config parameter is
7624 an optional hash reference of names and values to save, which defaults to the
7625 global %userconfig hash. The modulename parameter is the module to update the
7626 config file, which defaults to the current module.
7629 sub save_user_module_config
7631 my $c = $_[0] || { &get_module_variable('%userconfig') };
7632 my $m = $_[1] || &get_module_name();
7633 my $ucd = $user_config_directory;
7635 my @uinfo = @remote_user_info ? @remote_user_info
7636 : getpwnam($remote_user);
7637 return if (!@uinfo || !$uinfo[7]);
7638 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7640 &write_file("$ucd/$m/config", $c);
7643 =head2 nice_size(bytes, [min])
7645 Converts a number of bytes into a number followed by a suffix like GB, MB
7646 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7647 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7652 my ($units, $uname);
7653 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7654 $units = 1024*1024*1024*1024;
7657 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7658 $units = 1024*1024*1024;
7661 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7665 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7673 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7675 return $sz." ".$uname;
7678 =head2 get_perl_path
7680 Returns the path to Perl currently in use, such as /usr/bin/perl.
7685 if (open(PERL, "$config_directory/perl-path")) {
7691 return $^X if (-x $^X);
7692 return &has_command("perl");
7695 =head2 get_goto_module([&mods])
7697 Returns the details of a module that the current user should be re-directed
7698 to after logging in, or undef if none. Useful for themes.
7703 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7704 if ($gconfig{'gotomodule'}) {
7705 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7706 return $goto if ($goto);
7708 if (@mods == 1 && $gconfig{'gotoone'}) {
7714 =head2 select_all_link(field, form, [text])
7716 Returns HTML for a 'Select all' link that uses Javascript to select
7717 multiple checkboxes with the same name. The parameters are :
7719 =item field - Name of the checkbox inputs.
7721 =item form - Index of the form on the page.
7723 =item text - Message for the link, defaulting to 'Select all'.
7728 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7729 my ($field, $form, $text) = @_;
7731 $text ||= $text{'ui_selall'};
7732 return "<a class='select_all' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = true; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = true; } } return false'>$text</a>";
7735 =head2 select_invert_link(field, form, text)
7737 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7738 selection on multiple checkboxes with the same name. The parameters are :
7740 =item field - Name of the checkbox inputs.
7742 =item form - Index of the form on the page.
7744 =item text - Message for the link, defaulting to 'Invert selection'.
7747 sub select_invert_link
7749 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7750 my ($field, $form, $text) = @_;
7752 $text ||= $text{'ui_selinv'};
7753 return "<a class='select_invert' href='#' onClick='var ff = document.forms[$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>";
7756 =head2 select_rows_link(field, form, text, &rows)
7758 Returns HTML for a link that uses Javascript to select rows with particular
7759 values for their checkboxes. The parameters are :
7761 =item field - Name of the checkbox inputs.
7763 =item form - Index of the form on the page.
7765 =item text - Message for the link, de
7767 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7770 sub select_rows_link
7772 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7773 my ($field, $form, $text, $rows) = @_;
7775 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7776 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7777 $js .= "return false;";
7778 return "<a href='#' onClick='$js'>$text</a>";
7781 =head2 check_pid_file(file)
7783 Given a pid file, returns the PID it contains if the process is running.
7788 open(PIDFILE, $_[0]) || return undef;
7789 my $pid = <PIDFILE>;
7791 $pid =~ /^\s*(\d+)/ || return undef;
7792 kill(0, $1) || return undef;
7798 Return the local os-specific library name to this module. For internal use only.
7803 my $mn = &get_module_name();
7804 my $md = &module_root_directory($mn);
7805 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7806 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7808 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7809 return "$mn-$gconfig{'os_type'}-lib.pl";
7811 elsif (-r "$md/$mn-generic-lib.pl") {
7812 return "$mn-generic-lib.pl";
7819 =head2 module_root_directory(module)
7821 Given a module name, returns its root directory. On a typical Webmin install,
7822 all modules are under the same directory - but it is theoretically possible to
7826 sub module_root_directory
7828 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7829 if (@root_directories > 1) {
7830 foreach my $r (@root_directories) {
7836 return "$root_directories[0]/$d";
7839 =head2 list_mime_types
7841 Returns a list of all known MIME types and their extensions, as a list of hash
7842 references with keys :
7844 =item type - The MIME type, like text/plain.
7846 =item exts - A list of extensions, like .doc and .avi.
7848 =item desc - A human-readable description for the MIME type.
7853 if (!@list_mime_types_cache) {
7855 open(MIME, "$root_directory/mime.types");
7859 if (s/#\s*(.*)$//g) {
7862 my ($type, @exts) = split(/\s+/);
7864 push(@list_mime_types_cache, { 'type' => $type,
7871 return @list_mime_types_cache;
7874 =head2 guess_mime_type(filename, [default])
7876 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7877 The optional default parameter sets a default type of use if none is found,
7878 which defaults to application/octet-stream.
7883 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7885 foreach my $t (&list_mime_types()) {
7886 foreach my $e (@{$t->{'exts'}}) {
7887 return $t->{'type'} if (lc($e) eq lc($ext));
7891 return @_ > 1 ? $_[1] : "application/octet-stream";
7894 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7896 Opens a file handle for writing to a temporary file, which will only be
7897 renamed over the real file when the handle is closed. This allows critical
7898 files like /etc/shadow to be updated safely, even if writing fails part way
7899 through due to lack of disk space. The parameters are :
7901 =item handle - File handle to open, as you would use in Perl's open function.
7903 =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.
7905 =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 $! with the error code.
7907 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7909 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7915 # Just getting a temp file
7916 if (!defined($main::open_tempfiles{$_[0]})) {
7917 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7918 my $dir = $1 || "/";
7919 my $tmp = "$dir/$2.webmintmp.$$";
7920 $main::open_tempfiles{$_[0]} = $tmp;
7921 push(@main::temporary_files, $tmp);
7923 return $main::open_tempfiles{$_[0]};
7927 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7928 $fh = &callers_package($fh);
7930 my %gaccess = &get_module_acl(undef, "");
7931 my $db = $gconfig{'debug_what_write'};
7932 if ($file =~ /\r|\n|\0/) {
7933 if ($noerror) { return 0; }
7934 else { &error("Filename contains invalid characters"); }
7936 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7937 # Read-only mode .. veto all writes
7938 print STDERR "vetoing write to $file\n";
7939 return open($fh, ">$null_file");
7941 elsif ($file =~ /^(>|>>|)nul$/i) {
7942 # Write to Windows null device
7943 &webmin_debug_log($1 eq ">" ? "WRITE" :
7944 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7946 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7947 # Writes to /dev/null or TTYs don't need to be handled
7948 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7949 return open($fh, $file);
7951 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7952 &webmin_debug_log("WRITE", $1) if ($db);
7953 # Over-writing a file, via a temp file
7955 $file = &translate_filename($file);
7957 # Open the link target instead
7958 $file = &resolve_links($file);
7961 # Cannot open a directory!
7962 if ($noerror) { return 0; }
7963 else { &error("Cannot write to directory $file"); }
7965 my $tmp = &open_tempfile($file);
7966 my $ex = open($fh, ">$tmp");
7967 if (!$ex && $! =~ /permission/i) {
7968 # Could not open temp file .. try opening actual file
7970 $ex = open($fh, ">$file");
7971 delete($main::open_tempfiles{$file});
7974 $main::open_temphandles{$fh} = $file;
7977 if (!$ex && !$noerror) {
7978 &error(&text("efileopen", $file, $!));
7982 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7983 # Just writing direct to a file
7984 &webmin_debug_log("WRITE", $1) if ($db);
7986 $file = &translate_filename($file);
7987 my @old_attributes = &get_clear_file_attributes($file);
7988 my $ex = open($fh, ">$file");
7989 &reset_file_attributes($file, \@old_attributes);
7990 $main::open_temphandles{$fh} = $file;
7991 if (!$ex && !$noerror) {
7992 &error(&text("efileopen", $file, $!));
7997 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7998 # Appending to a file .. nothing special to do
7999 &webmin_debug_log("APPEND", $1) if ($db);
8001 $file = &translate_filename($file);
8002 my @old_attributes = &get_clear_file_attributes($file);
8003 my $ex = open($fh, ">>$file");
8004 &reset_file_attributes($file, \@old_attributes);
8005 $main::open_temphandles{$fh} = $file;
8006 if (!$ex && !$noerror) {
8007 &error(&text("efileopen", $file, $!));
8012 elsif ($file =~ /^([a-zA-Z]:)?\//) {
8013 # Read mode .. nothing to do here
8014 &webmin_debug_log("READ", $file) if ($db);
8015 $file = &translate_filename($file);
8016 return open($fh, $file);
8018 elsif ($file eq ">" || $file eq ">>") {
8019 my ($package, $filename, $line) = caller;
8020 if ($noerror) { return 0; }
8021 else { &error("Missing file to open at ${package}::${filename} line $line"); }
8024 my ($package, $filename, $line) = caller;
8025 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
8030 =head2 close_tempfile(file|handle)
8032 Copies a temp file to the actual file, assuming that all writes were
8033 successful. The handle must have been one passed to open_tempfile.
8039 my $fh = &callers_package($_[0]);
8041 if (defined($file = $main::open_temphandles{$fh})) {
8043 close($fh) || &error(&text("efileclose", $file, $!));
8044 delete($main::open_temphandles{$fh});
8045 return &close_tempfile($file);
8047 elsif (defined($main::open_tempfiles{$_[0]})) {
8049 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
8050 my @st = stat($_[0]);
8051 if (&is_selinux_enabled() && &has_command("chcon")) {
8052 # Set original security context
8053 system("chcon --reference=".quotemeta($_[0]).
8054 " ".quotemeta($main::open_tempfiles{$_[0]}).
8055 " >/dev/null 2>&1");
8057 my @old_attributes = &get_clear_file_attributes($_[0]);
8058 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
8060 # Set original permissions and ownership
8061 chmod($st[2], $_[0]);
8062 chown($st[4], $st[5], $_[0]);
8064 &reset_file_attributes($_[0], \@old_attributes);
8065 delete($main::open_tempfiles{$_[0]});
8066 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
8067 if ($main::open_templocks{$_[0]}) {
8068 &unlock_file($_[0]);
8069 delete($main::open_templocks{$_[0]});
8074 # Must be closing a handle not associated with a file
8080 =head2 print_tempfile(handle, text, ...)
8082 Like the normal print function, but calls &error on failure. Useful when
8083 combined with open_tempfile, to ensure that a criticial file is never
8084 only partially written.
8089 my ($fh, @args) = @_;
8090 $fh = &callers_package($fh);
8091 (print $fh @args) || &error(&text("efilewrite",
8092 $main::open_temphandles{$fh} || $fh, $!));
8095 =head2 is_selinux_enabled
8097 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
8100 sub is_selinux_enabled
8102 if (!defined($main::selinux_enabled_cache)) {
8104 if ($gconfig{'os_type'} !~ /-linux$/) {
8105 # Not on linux, so no way
8106 $main::selinux_enabled_cache = 0;
8108 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
8109 # Use global config file
8110 $main::selinux_enabled_cache =
8111 $seconfig{'SELINUX'} eq 'disabled' ||
8112 !$seconfig{'SELINUX'} ? 0 : 1;
8115 # Use selinuxenabled command
8116 #$selinux_enabled_cache =
8117 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
8118 $main::selinux_enabled_cache = 0;
8121 return $main::selinux_enabled_cache;
8124 =head2 get_clear_file_attributes(file)
8126 Finds file attributes that may prevent writing, clears them and returns them
8127 as a list. May call error. Mainly for internal use by open_tempfile and
8131 sub get_clear_file_attributes
8135 if ($gconfig{'chattr'}) {
8136 # Get original immutable bit
8137 my $out = &backquote_command(
8138 "lsattr ".quotemeta($file)." 2>/dev/null");
8140 $out =~ s/\s\S+\n//;
8141 @old_attributes = grep { $_ ne '-' } split(//, $out);
8143 if (&indexof("i", @old_attributes) >= 0) {
8144 my $err = &backquote_logged(
8145 "chattr -i ".quotemeta($file)." 2>&1");
8147 &error("Failed to remove immutable bit on ".
8152 return @old_attributes;
8155 =head2 reset_file_attributes(file, &attributes)
8157 Put back cleared attributes on some file. May call error. Mainly for internal
8158 use by close_tempfile.
8161 sub reset_file_attributes
8163 my ($file, $old_attributes) = @_;
8164 if (&indexof("i", @$old_attributes) >= 0) {
8165 my $err = &backquote_logged(
8166 "chattr +i ".quotemeta($file)." 2>&1");
8168 &error("Failed to restore immutable bit on ".
8174 =head2 cleanup_tempnames
8176 Remove all temporary files generated using transname. Typically only called
8177 internally when a Webmin script exits.
8180 sub cleanup_tempnames
8182 foreach my $t (@main::temporary_files) {
8185 @main::temporary_files = ( );
8188 =head2 open_lock_tempfile([handle], file, [no-error])
8190 Returns a temporary file for writing to some actual file, and also locks it.
8191 Effectively the same as calling lock_file and open_tempfile on the same file,
8192 but calls the unlock for you automatically when it is closed.
8195 sub open_lock_tempfile
8197 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8198 $fh = &callers_package($fh);
8199 my $lockfile = $file;
8200 $lockfile =~ s/^[^\/]*//;
8201 if ($lockfile =~ /^\//) {
8202 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8204 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8209 $main::end_exit_status ||= $?;
8210 if ($$ == $main::initial_process_id) {
8211 # Exiting from initial process
8212 &cleanup_tempnames();
8213 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8214 $main::debug_log_start_module eq &get_module_name()) {
8215 my $len = time() - $main::debug_log_start_time;
8216 &webmin_debug_log("STOP", "runtime=$len");
8217 $main::debug_log_start_time = 0;
8219 if (!$ENV{'SCRIPT_NAME'} &&
8220 $main::initial_module_name eq &get_module_name()) {
8221 # In a command-line script - call the real exit, so that the
8222 # exit status gets properly propogated. In some cases this
8223 # was not happening.
8224 exit($main::end_exit_status);
8229 =head2 month_to_number(month)
8231 Converts a month name like feb to a number like 1.
8236 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8239 =head2 number_to_month(number)
8241 Converts a number like 1 to a month name like Feb.
8246 return ucfirst($number_to_month_map{$_[0]});
8249 =head2 get_rbac_module_acl(user, module)
8251 Returns a hash reference of RBAC overrides ACLs for some user and module.
8252 May return undef if none exist (indicating access denied), or the string *
8253 if full access is granted.
8256 sub get_rbac_module_acl
8258 my ($user, $mod) = @_;
8259 eval "use Authen::SolarisRBAC";
8260 return undef if ($@);
8263 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8264 # Automagic webmin.modulename.admin authorization exists .. allow access
8266 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8267 %rv = ( 'noconfig' => 1 );
8274 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8278 my ($auths, $acls) = split(/\s+/, $_);
8279 my @auths = split(/,/, $auths);
8281 my ($merge) = ($acls =~ s/^\+//);
8283 if ($auths eq "*") {
8284 # These ACLs apply to all RBAC users.
8285 # Only if there is some that match a specific authorization
8286 # later will they be used though.
8289 # Check each of the RBAC authorizations
8290 foreach my $a (@auths) {
8291 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8296 $foundany++ if ($gotall);
8299 # Found an RBAC authorization - return the ACLs
8300 return "*" if ($acls eq "*");
8301 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8303 # Just add to current set
8304 foreach my $a (keys %acl) {
8315 return !$foundany ? undef : %rv ? \%rv : undef;
8318 =head2 supports_rbac([module])
8320 Returns 1 if RBAC client support is available, such as on Solaris.
8325 return 0 if ($gconfig{'os_type'} ne 'solaris');
8326 eval "use Authen::SolarisRBAC";
8329 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8334 =head2 supports_ipv6()
8336 Returns 1 if outgoing IPv6 connections can be made
8341 return $ipv6_module_error ? 0 : 1;
8344 =head2 use_rbac_module_acl(user, module)
8346 Returns 1 if some user should use RBAC to get permissions for a module
8349 sub use_rbac_module_acl
8351 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8352 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8353 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8354 my %access = &get_module_acl($u, $m, 1);
8355 return $access{'rbac'} ? 1 : 0;
8358 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8360 Runs some command, possibly feeding it input and capturing output to the
8361 give files or scalar references. The parameters are :
8363 =item command - Full command to run, possibly including shell meta-characters.
8365 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8367 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8369 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8371 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8373 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8378 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8379 if (&is_readonly_mode() && !$safe) {
8380 print STDERR "Vetoing command $_[0]\n";
8384 $cmd = &translate_command($cmd);
8386 # Use ` operator where possible
8387 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8388 if (!$stdin && ref($stdout) && !$stderr) {
8389 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8390 $$stdout = `$cmd 2>$null_file`;
8393 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8394 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8395 $$stdout = `$cmd 2>&1`;
8398 elsif (!$stdin && !$stdout && !$stderr) {
8399 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8400 return system("$cmd >$null_file 2>$null_file <$null_file");
8404 $| = 1; # needed on some systems to flush before forking
8405 pipe(EXECSTDINr, EXECSTDINw);
8406 pipe(EXECSTDOUTr, EXECSTDOUTw);
8407 pipe(EXECSTDERRr, EXECSTDERRw);
8409 if (!($pid = fork())) {
8413 open(STDIN, "<&EXECSTDINr");
8414 open(STDOUT, ">&EXECSTDOUTw");
8415 if (ref($stderr) && $stderr eq $stdout) {
8416 open(STDERR, ">&EXECSTDOUTw");
8419 open(STDERR, ">&EXECSTDERRw");
8426 my $fullcmd = "($cmd)";
8427 if ($stdin && !ref($stdin)) {
8428 $fullcmd .= " <$stdin";
8430 if ($stdout && !ref($stdout)) {
8431 $fullcmd .= " >$stdout";
8433 if ($stderr && !ref($stderr)) {
8434 if ($stderr eq $stdout) {
8435 $fullcmd .= " 2>&1";
8438 $fullcmd .= " 2>$stderr";
8441 if ($gconfig{'os_type'} eq 'windows') {
8445 exec("/bin/sh", "-c", $fullcmd);
8447 print "Exec failed : $!\n";
8454 # Feed input and capture output
8456 if ($stdin && ref($stdin)) {
8457 print EXECSTDINw $$stdin;
8460 if ($stdout && ref($stdout)) {
8462 while(<EXECSTDOUTr>) {
8467 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8469 while(<EXECSTDERRr>) {
8480 =head2 open_readfile(handle, file)
8482 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8483 exactly the same as Perl's open function.
8488 my ($fh, $file) = @_;
8489 $fh = &callers_package($fh);
8490 my $realfile = &translate_filename($file);
8491 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8492 return open($fh, "<".$realfile);
8495 =head2 open_execute_command(handle, command, output?, safe?)
8497 Runs some command, with the specified file handle set to either write to it if
8498 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8499 indicates if the command modifies the state of the system or not.
8502 sub open_execute_command
8504 my ($fh, $cmd, $mode, $safe) = @_;
8505 $fh = &callers_package($fh);
8506 my $realcmd = &translate_command($cmd);
8507 if (&is_readonly_mode() && !$safe) {
8508 # Don't actually run it
8509 print STDERR "vetoing command $cmd\n";
8512 return open($fh, ">$null_file");
8515 return open($fh, $null_file);
8519 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8520 if ($gconfig{'debug_what_cmd'});
8522 return open($fh, "| $cmd");
8524 elsif ($mode == 1) {
8525 return open($fh, "$cmd 2>$null_file |");
8527 elsif ($mode == 2) {
8528 return open($fh, "$cmd 2>&1 |");
8532 =head2 translate_filename(filename)
8534 Applies all relevant registered translation functions to a filename. Mostly
8535 for internal use, and typically does nothing.
8538 sub translate_filename
8540 my ($realfile) = @_;
8541 my @funcs = grep { $_->[0] eq &get_module_name() ||
8542 !defined($_->[0]) } @main::filename_callbacks;
8543 foreach my $f (@funcs) {
8545 $realfile = &$func($realfile, @{$f->[2]});
8550 =head2 translate_command(filename)
8552 Applies all relevant registered translation functions to a command. Mostly
8553 for internal use, and typically does nothing.
8556 sub translate_command
8559 my @funcs = grep { $_->[0] eq &get_module_name() ||
8560 !defined($_->[0]) } @main::command_callbacks;
8561 foreach my $f (@funcs) {
8563 $realcmd = &$func($realcmd, @{$f->[2]});
8568 =head2 register_filename_callback(module|undef, &function, &args)
8570 Registers some function to be called when the specified module (or all
8571 modules) tries to open a file for reading and writing. The function must
8572 return the actual file to open. This allows you to override which files
8573 other code actually operates on, via the translate_filename function.
8576 sub register_filename_callback
8578 my ($mod, $func, $args) = @_;
8579 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8582 =head2 register_command_callback(module|undef, &function, &args)
8584 Registers some function to be called when the specified module (or all
8585 modules) tries to execute a command. The function must return the actual
8586 command to run. This allows you to override which commands other other code
8587 actually runs, via the translate_command function.
8590 sub register_command_callback
8592 my ($mod, $func, $args) = @_;
8593 push(@main::command_callbacks, [ $mod, $func, $args ]);
8596 =head2 capture_function_output(&function, arg, ...)
8598 Captures output that some function prints to STDOUT, and returns it. Useful
8599 for functions outside your control that print data when you really want to
8600 manipulate it before output.
8603 sub capture_function_output
8605 my ($func, @args) = @_;
8606 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8607 my $old = select(SOCKET1);
8608 my @rv = &$func(@args);
8617 return wantarray ? ($out, \@rv) : $out;
8620 =head2 capture_function_output_tempfile(&function, arg, ...)
8622 Behaves the same as capture_function_output, but uses a temporary file
8623 to avoid buffer full problems.
8626 sub capture_function_output_tempfile
8628 my ($func, @args) = @_;
8629 my $temp = &transname();
8630 open(BUFFER, ">$temp");
8631 my $old = select(BUFFER);
8632 my @rv = &$func(@args);
8635 my $out = &read_file_contents($temp);
8636 &unlink_file($temp);
8637 return wantarray ? ($out, \@rv) : $out;
8640 =head2 modules_chooser_button(field, multiple, [form])
8642 Returns HTML for a button for selecting one or many Webmin modules.
8643 field - Name of the HTML field to place the module names into.
8644 multiple - Set to 1 if multiple modules can be selected.
8645 form - Index of the form on the page.
8648 sub modules_chooser_button
8650 return &theme_modules_chooser_button(@_)
8651 if (defined(&theme_modules_chooser_button));
8652 my $form = defined($_[2]) ? $_[2] : 0;
8653 my $w = $_[1] ? 700 : 500;
8655 if ($_[1] && $gconfig{'db_sizemodules'}) {
8656 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8658 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8659 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8661 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";
8664 =head2 substitute_template(text, &hash)
8666 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8667 the text replaces it with the value of the hash key foo. Also supports blocks
8668 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8669 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8672 sub substitute_template
8674 # Add some extra fixed parameters to the hash
8675 my %hash = %{$_[1]};
8676 $hash{'hostname'} = &get_system_hostname();
8677 $hash{'webmin_config'} = $config_directory;
8678 $hash{'webmin_etc'} = $config_directory;
8679 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8680 $hash{'webmin_var'} = $var_directory;
8682 # Add time-based parameters, for use in DNS
8683 $hash{'current_time'} = time();
8684 my @tm = localtime($hash{'current_time'});
8685 $hash{'current_year'} = $tm[5]+1900;
8686 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8687 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8688 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8689 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8690 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8692 # Actually do the substition
8694 foreach my $s (keys %hash) {
8695 next if ($s eq ''); # Prevent just $ from being subbed
8698 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8699 $rv =~ s/\$\Q$us\E/$sv/g;
8701 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8702 # and ${IF}..${ENDIF} with value
8703 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8704 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8706 # Replace $IF..$ELSE..$ENDIF block with first value,
8707 # and $IF..$ENDIF with value
8708 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8709 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8711 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8712 # matching, nothing if not
8713 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8714 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8716 # Replace $IFEQ..$ENDIFEQ block with first value if
8717 # matching, nothing if not
8718 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8719 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8722 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8723 # and ${IF}..${ENDIF} with nothing
8724 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8725 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8727 # Replace $IF..$ELSE..$ENDIF block with second value,
8728 # and $IF..$ENDIF with nothing
8729 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8730 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8732 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8733 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8734 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8738 # Now assume any $IF blocks whose variables are not present in the hash
8739 # evaluate to false.
8740 # $IF...$ELSE x $ENDIF => x
8741 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8742 # $IF...x...$ENDIF => (nothing)
8743 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8744 # ${var} => (nothing)
8745 $rv =~ s/\$\{[A-Z]+\}//g;
8750 =head2 running_in_zone
8752 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8753 disable module and features that are not appropriate, like those that modify
8754 mounted filesystems.
8759 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8760 $gconfig{'os_version'} < 10);
8761 my $zn = `zonename 2>$null_file`;
8763 return $zn && $zn ne "global";
8766 =head2 running_in_vserver
8768 Returns 1 if the current Webmin instance is running in a Linux VServer.
8769 Used to disable modules and features that are not appropriate.
8772 sub running_in_vserver
8774 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8777 open(MTAB, "/etc/mtab");
8779 my ($dev, $mp) = split(/\s+/, $_);
8780 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8789 =head2 running_in_xen
8791 Returns 1 if Webmin is running inside a Xen instance, by looking
8792 at /proc/xen/capabilities.
8797 return 0 if (!-r "/proc/xen/capabilities");
8798 my $cap = &read_file_contents("/proc/xen/capabilities");
8799 return $cap =~ /control_d/ ? 0 : 1;
8802 =head2 running_in_openvz
8804 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8805 at /proc/vz/veinfo for a non-zero line.
8808 sub running_in_openvz
8810 return 0 if (!-r "/proc/vz/veinfo");
8811 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8812 return 0 if (!$lref || !@$lref);
8813 foreach my $l (@$lref) {
8815 my @ll = split(/\s+/, $l);
8816 return 0 if ($ll[0] eq '0');
8821 =head2 list_categories(&modules, [include-empty])
8823 Returns a hash mapping category codes to names, including any custom-defined
8824 categories. The modules parameter must be an array ref of module hash objects,
8825 as returned by get_all_module_infos.
8830 my ($mods, $empty) = @_;
8831 my (%cats, %catnames);
8832 &read_file("$config_directory/webmin.catnames", \%catnames);
8833 foreach my $o (@lang_order_list) {
8834 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8839 foreach my $m (@$mods) {
8840 my $c = $m->{'category'};
8841 next if ($cats{$c});
8842 if (defined($catnames{$c})) {
8843 $cats{$c} = $catnames{$c};
8845 elsif ($text{"category_$c"}) {
8846 $cats{$c} = $text{"category_$c"};
8849 # try to get category name from module ..
8850 my %mtext = &load_language($m->{'dir'});
8851 if ($mtext{"category_$c"}) {
8852 $cats{$c} = $mtext{"category_$c"};
8855 $c = $m->{'category'} = "";
8856 $cats{$c} = $text{"category_$c"};
8863 =head2 is_readonly_mode
8865 Returns 1 if the current user is in read-only mode, and thus all writes
8866 to files and command execution should fail.
8869 sub is_readonly_mode
8871 if (!defined($main::readonly_mode_cache)) {
8872 my %gaccess = &get_module_acl(undef, "");
8873 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8875 return $main::readonly_mode_cache;
8878 =head2 command_as_user(user, with-env?, command, ...)
8880 Returns a command to execute some command as the given user, using the
8881 su statement. If on Linux, the /bin/sh shell is forced in case the user
8882 does not have a valid shell. If with-env is set to 1, the -s flag is added
8883 to the su command to read the user's .profile or .bashrc file.
8888 my ($user, $env, @args) = @_;
8889 my @uinfo = getpwnam($user);
8890 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8891 # User shell doesn't appear to be valid
8892 if ($gconfig{'os_type'} =~ /-linux$/) {
8893 # Use -s /bin/sh to force it
8894 $shellarg = " -s /bin/sh";
8896 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8897 $gconfig{'os_type'} eq 'solaris' &&
8898 $gconfig{'os_version'} >= 11 ||
8899 $gconfig{'os_type'} eq 'macos') {
8900 # Use -m and force /bin/sh
8901 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8905 my $rv = "su".($env ? " -" : "").$shellarg.
8906 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8910 =head2 list_osdn_mirrors(project, file)
8912 This function is now deprecated in favor of letting sourceforge just
8913 redirect to the best mirror, and now just returns their primary download URL.
8916 sub list_osdn_mirrors
8918 my ($project, $file) = @_;
8919 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8921 'mirror' => 'downloads' } );
8924 =head2 convert_osdn_url(url)
8926 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8927 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8928 to a real URL on the sourceforge download redirector.
8931 sub convert_osdn_url
8934 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8935 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8936 # Always use the Sourceforge mail download URL, which does
8937 # a location-based redirect for us
8938 my ($project, $file) = ($1, $2);
8939 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8941 return wantarray ? ( $url, 0 ) : $url;
8944 # Some other source .. don't change
8945 return wantarray ? ( $url, 2 ) : $url;
8949 =head2 get_current_dir
8951 Returns the directory the current process is running in.
8957 if ($gconfig{'os_type'} eq 'windows') {
8970 =head2 supports_users
8972 Returns 1 if the current OS supports Unix user concepts and functions like
8973 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8979 return $gconfig{'os_type'} ne 'windows';
8982 =head2 supports_symlinks
8984 Returns 1 if the current OS supports symbolic and hard links. This will not
8985 be the case on Windows.
8988 sub supports_symlinks
8990 return $gconfig{'os_type'} ne 'windows';
8993 =head2 quote_path(path)
8995 Returns a path with safe quoting for the current operating system.
9001 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
9002 # Windows only supports "" style quoting
9006 return quotemeta($path);
9010 =head2 get_windows_root
9012 Returns the base windows system directory, like c:/windows.
9015 sub get_windows_root
9017 if ($ENV{'SystemRoot'}) {
9018 my $rv = $ENV{'SystemRoot'};
9023 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
9027 =head2 read_file_contents(file)
9029 Given a filename, returns its complete contents as a string. Effectively
9030 the same as the Perl construct `cat file`.
9033 sub read_file_contents
9035 &open_readfile(FILE, $_[0]) || return undef;
9042 =head2 unix_crypt(password, salt)
9044 Performs Unix encryption on a password, using the built-in crypt function or
9045 the Crypt::UnixCrypt module if the former does not work. The salt parameter
9046 must be either an already-hashed password, or a two-character alpha-numeric
9052 my ($pass, $salt) = @_;
9053 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
9054 my $rv = eval "crypt(\$pass, \$salt)";
9056 return $rv if ($rv && !$@);
9057 eval "use Crypt::UnixCrypt";
9059 return Crypt::UnixCrypt::crypt($pass, $salt);
9062 &error("Failed to encrypt password : $err");
9066 =head2 split_quoted_string(string)
9068 Given a string like I<foo "bar baz" quux>, returns the array :
9072 sub split_quoted_string
9076 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
9077 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
9078 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
9085 =head2 write_to_http_cache(url, file|&data)
9087 Updates the Webmin cache with the contents of the given file, possibly also
9088 clearing out old data. Mainly for internal use by http_download.
9091 sub write_to_http_cache
9093 my ($url, $file) = @_;
9094 return 0 if (!$gconfig{'cache_size'});
9096 # Don't cache downloads that look dynamic
9097 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
9101 # Check if the current module should do caching
9102 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9103 # Caching all except some modules
9104 my @mods = split(/\s+/, $1);
9105 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9107 elsif ($gconfig{'cache_mods'}) {
9108 # Only caching some modules
9109 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9110 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9116 $size = length($$file);
9119 my @st = stat($file);
9123 if ($size > $gconfig{'cache_size'}) {
9124 # Bigger than the whole cache - so don't save it
9129 $cfile = "$main::http_cache_directory/$cfile";
9131 # See how much we have cached currently, clearing old files
9133 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
9134 opendir(CACHEDIR, $main::http_cache_directory);
9135 foreach my $f (readdir(CACHEDIR)) {
9136 next if ($f eq "." || $f eq "..");
9137 my $path = "$main::http_cache_directory/$f";
9138 my @st = stat($path);
9139 if ($gconfig{'cache_days'} &&
9140 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9141 # This file is too old .. trash it
9146 push(@cached, [ $path, $st[7], $st[9] ]);
9150 @cached = sort { $a->[2] <=> $b->[2] } @cached;
9151 while($total+$size > $gconfig{'cache_size'} && @cached) {
9152 # Cache is too big .. delete some files until the new one will fit
9153 unlink($cached[0]->[0]);
9154 $total -= $cached[0]->[1];
9158 # Finally, write out the new file
9160 &open_tempfile(CACHEFILE, ">$cfile");
9161 &print_tempfile(CACHEFILE, $$file);
9162 &close_tempfile(CACHEFILE);
9165 my ($ok, $err) = ©_source_dest($file, $cfile);
9171 =head2 check_in_http_cache(url)
9173 If some URL is in the cache and valid, return the filename for it. Mainly
9174 for internal use by http_download.
9177 sub check_in_http_cache
9180 return undef if (!$gconfig{'cache_size'});
9182 # Check if the current module should do caching
9183 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9184 # Caching all except some modules
9185 my @mods = split(/\s+/, $1);
9186 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9188 elsif ($gconfig{'cache_mods'}) {
9189 # Only caching some modules
9190 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9191 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9196 $cfile = "$main::http_cache_directory/$cfile";
9197 my @st = stat($cfile);
9198 return undef if (!@st || !$st[7]);
9199 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9204 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9209 =head2 supports_javascript
9211 Returns 1 if the current browser is assumed to support javascript.
9214 sub supports_javascript
9216 if (defined(&theme_supports_javascript)) {
9217 return &theme_supports_javascript();
9219 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9222 =head2 get_module_name
9224 Returns the name of the Webmin module that called this function. For internal
9225 use only by other API functions.
9230 return &get_module_variable('$module_name');
9233 =head2 get_module_variable(name, [ref])
9235 Returns the value of some variable which is set in the caller's context, if
9236 using the new WebminCore package. For internal use only.
9239 sub get_module_variable
9241 my ($v, $wantref) = @_;
9242 my $slash = $wantref ? "\\" : "";
9243 my $thispkg = &web_libs_package();
9244 if ($thispkg eq 'WebminCore') {
9245 my ($vt, $vn) = split('', $v, 2);
9247 for(my $i=0; ($callpkg) = caller($i); $i++) {
9248 last if ($callpkg ne $thispkg);
9250 return eval "${slash}${vt}${callpkg}::${vn}";
9252 return eval "${slash}${v}";
9255 =head2 clear_time_locale()
9257 Temporarily force the locale to C, until reset_time_locale is called. This is
9258 useful if your code is going to call C<strftime> from the POSIX package, and
9259 you want to ensure that the output is in a consistent format.
9262 sub clear_time_locale
9264 if ($main::clear_time_locale_count == 0) {
9267 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9268 POSIX::setlocale(POSIX::LC_TIME, "C");
9271 $main::clear_time_locale_count++;
9274 =head2 reset_time_locale()
9276 Revert the locale to whatever it was before clear_time_locale was called
9279 sub reset_time_locale
9281 if ($main::clear_time_locale_count == 1) {
9283 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9284 $main::clear_time_locale_old = undef;
9287 $main::clear_time_locale_count--;
9290 =head2 callers_package(filehandle)
9292 Convert a non-module filehandle like FOO to one qualified with the
9293 caller's caller's package, like fsdump::FOO. For internal use only.
9299 my $callpkg = (caller(1))[0];
9300 my $thispkg = &web_libs_package();
9301 if (!ref($fh) && $fh !~ /::/ &&
9302 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9303 $fh = $callpkg."::".$fh;
9308 =head2 web_libs_package()
9310 Returns the package this code is in. We can't always trust __PACKAGE__. For
9314 sub web_libs_package
9316 if ($called_from_webmin_core) {
9317 return "WebminCore";
9322 =head2 get_userdb_string
9324 Returns the URL-style string for connecting to the users and groups database
9327 sub get_userdb_string
9329 return undef if ($main::no_miniserv_userdb);
9331 &get_miniserv_config(\%miniserv);
9332 return $miniserv{'userdb'};
9335 =head2 connect_userdb(string)
9337 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9338 On failure returns an error message string. In an array context, returns the
9345 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9346 if ($proto eq "mysql") {
9347 # Connect to MySQL with DBI
9348 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9349 $drh || return $text{'sql_emysqldriver'};
9350 my ($host, $port) = split(/:/, $host);
9351 my $cstr = "database=$prefix;host=$host";
9352 $cstr .= ";port=$port" if ($port);
9353 my $dbh = $drh->connect($cstr, $user, $pass, { });
9354 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9355 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9357 elsif ($proto eq "postgresql") {
9358 # Connect to PostgreSQL with DBI
9359 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9360 $drh || return $text{'sql_epostgresqldriver'};
9361 my ($host, $port) = split(/:/, $host);
9362 my $cstr = "dbname=$prefix;host=$host";
9363 $cstr .= ";port=$port" if ($port);
9364 my $dbh = $drh->connect($cstr, $user, $pass);
9365 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9366 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9368 elsif ($proto eq "ldap") {
9369 # Connect with perl LDAP module
9370 eval "use Net::LDAP";
9371 $@ && return $text{'sql_eldapdriver'};
9372 my ($host, $port) = split(/:/, $host);
9373 my $scheme = $args->{'scheme'} || 'ldap';
9375 $port = $scheme eq 'ldaps' ? 636 : 389;
9377 my $ldap = Net::LDAP->new($host,
9379 'scheme' => $scheme);
9380 $ldap || return &text('sql_eldapconnect', $host);
9382 if ($args->{'tls'}) {
9383 # Switch to TLS mode
9384 eval { $mesg = $ldap->start_tls(); };
9385 if ($@ || !$mesg || $mesg->code) {
9386 return &text('sql_eldaptls',
9387 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9390 # Login to the server
9392 $mesg = $ldap->bind(dn => $user, password => $pass);
9395 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9397 if (!$mesg || $mesg->code) {
9398 return &text('sql_eldaplogin', $user,
9399 $mesg ? $mesg->error : "Unknown error");
9401 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9404 return "Unknown protocol $proto";
9408 =head2 disconnect_userdb(string, &handle)
9410 Closes a handle opened by connect_userdb
9413 sub disconnect_userdb
9416 if ($str =~ /^(mysql|postgresql):/) {
9418 if (!$h->{'AutoCommit'}) {
9423 elsif ($str =~ /^ldap:/) {
9430 =head2 split_userdb_string(string)
9432 Converts a string like mysql://user:pass@host/db into separate parts
9435 sub split_userdb_string
9438 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9439 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9440 ($1, $2, $3, $4, $5, $7);
9441 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9442 return ($proto, $user, $pass, $host, $prefix, \%args);
9447 $done_web_lib_funcs = 1;