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) { $$err = $msg; return 0; }
2563 else { &error($msg); }
2566 elsif ($ip = &to_ip6address($host)) {
2567 # Create IPv6 socket and connection
2568 if (!socket($fh, Socket6::PF_INET6(), SOCK_STREAM, $proto)) {
2569 my $msg = "Failed to create IPv6 socket : $!";
2570 if ($err) { $$err = $msg; return 0; }
2571 else { &error($msg); }
2573 my $addr = inet_pton(Socket6::AF_INET6(), $ip);
2574 if (!connect($fh, pack_sockaddr_in6($port, $addr))) {
2575 my $msg = "Failed to IPv6 connect to $host:$port : $!";
2576 if ($err) { $$err = $msg; return 0; }
2577 else { &error($msg); }
2582 my $msg = "Failed to lookup IP address for $host";
2583 if ($err) { $$err = $msg; return 0; }
2584 else { &error($msg); }
2588 my $old = select($fh);
2594 =head2 download_timeout
2596 Called when a download times out. For internal use only.
2599 sub download_timeout
2601 $main::download_timed_out = "Download timed out";
2604 =head2 ftp_command(command, expected, [&error], [filehandle])
2606 Send an FTP command, and die if the reply is not what was expected. Mainly
2607 for internal use by the ftp_download and ftp_upload functions.
2612 my ($cmd, $expect, $err, $fh) = @_;
2614 $fh = &callers_package($fh);
2617 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2619 print $fh "$cmd\r\n";
2622 if (!($line = <$fh>)) {
2624 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2625 else { &error("Failed to read reply to $what"); }
2627 $line =~ /^(...)(.)(.*)$/;
2630 foreach my $c (@$expect) {
2631 $found++ if (int($1/100) == $c);
2635 $found++ if (int($1/100) == $_[1]);
2639 if ($err) { $$err = "$what failed : $3"; return undef; }
2640 else { &error("$what failed : $3"); }
2645 # Need to skip extra stuff..
2647 if (!($line = <$fh>)) {
2649 if ($$err) { $$err = "Failed to read reply to $what";
2651 else { &error("Failed to read reply to $what"); }
2653 $line =~ /^(....)(.*)$/; $reply .= $2;
2654 if ($1 eq "$rcode ") { last; }
2658 return wantarray ? ($reply, $rcode) : $reply;
2661 =head2 to_ipaddress(hostname)
2663 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2664 it cannot be resolved.
2669 if (&check_ipaddress($_[0])) {
2670 return $_[0]; # Already in v4 format
2672 elsif (&check_ip6address($_[0])) {
2673 return undef; # A v6 address cannot be converted to v4
2676 my $hn = gethostbyname($_[0]);
2677 return undef if (!$hn);
2678 local @ip = unpack("CCCC", $hn);
2679 return join("." , @ip);
2683 =head2 to_ip6address(hostname)
2685 Converts a hostname to IPv6 address, or returns undef if it cannot be resolved.
2690 if (&check_ip6address($_[0])) {
2691 return $_[0]; # Already in v6 format
2693 elsif (&check_ipaddress($_[0])) {
2694 return undef; # A v4 address cannot be v6
2696 elsif (!&supports_ipv6()) {
2697 return undef; # Cannot lookup
2700 # Perform IPv6 DNS lookup
2702 (undef, undef, undef, $inaddr) =
2703 getaddrinfo($_[0], undef, Socket6::AF_INET6(), SOCK_STREAM);
2704 return undef if (!$inaddr);
2706 (undef, $addr) = unpack_sockaddr_in6($inaddr);
2707 return inet_ntop(Socket6::AF_INET6(), $addr);
2711 =head2 to_hostname(ipv4|ipv6-address)
2713 Reverse-resolves an IPv4 or 6 address to a hostname
2719 if (&check_ip6address($addr) && &supports_ipv6()) {
2720 return gethostbyaddr(inet_pton(Socket6::AF_INET6(), $addr),
2721 Socket6::AF_INET6());
2724 return gethostbyaddr(inet_aton($addr), AF_INET);
2728 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2730 Renders a 4-column table of icons. The useful parameters are :
2732 =item links - An array ref of link destination URLs for the icons.
2734 =item titles - An array ref of titles to appear under the icons.
2736 =item icons - An array ref of URLs for icon images.
2738 =item columns - Number of columns to layout the icons with. Defaults to 4.
2743 &load_theme_library();
2744 if (defined(&theme_icons_table)) {
2745 &theme_icons_table(@_);
2749 my $cols = $_[3] ? $_[3] : 4;
2750 my $per = int(100.0 / $cols);
2751 print "<table class='icons_table' width=100% cellpadding=5>\n";
2752 for(my $i=0; $i<@{$_[0]}; $i++) {
2753 if ($i%$cols == 0) { print "<tr>\n"; }
2754 print "<td width=$per% align=center valign=top>\n";
2755 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2756 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2757 $_[7]->[$i], $_[8]->[$i]);
2759 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2761 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2762 print "</tr>\n" if ($need_tr);
2766 =head2 replace_file_line(file, line, [newline]*)
2768 Replaces one line in some file with 0 or more new lines. The parameters are :
2770 =item file - Full path to some file, like /etc/hosts.
2772 =item line - Line number to replace, starting from 0.
2774 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2777 sub replace_file_line
2780 my $realfile = &translate_filename($_[0]);
2781 open(FILE, $realfile);
2784 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2785 else { splice(@lines, $_[1], 1); }
2786 &open_tempfile(FILE, ">$realfile");
2787 &print_tempfile(FILE, @lines);
2788 &close_tempfile(FILE);
2791 =head2 read_file_lines(file, [readonly])
2793 Returns a reference to an array containing the lines from some file. This
2794 array can be modified, and will be written out when flush_file_lines()
2795 is called. The parameters are :
2797 =item file - Full path to the file to read.
2799 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2803 $lref = read_file_lines("/etc/hosts");
2804 push(@$lref, "127.0.0.1 localhost");
2805 flush_file_lines("/etc/hosts");
2811 my ($package, $filename, $line) = caller;
2812 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2814 my $realfile = &translate_filename($_[0]);
2815 if (!$main::file_cache{$realfile}) {
2818 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2819 open(READFILE, $realfile);
2822 $eol = /\r\n$/ ? "\r\n" : "\n";
2828 $main::file_cache{$realfile} = \@lines;
2829 $main::file_cache_noflush{$realfile} = $_[1];
2830 $main::file_cache_eol{$realfile} = $eol || "\n";
2833 # Make read-write if currently readonly
2835 $main::file_cache_noflush{$realfile} = 0;
2838 return $main::file_cache{$realfile};
2841 =head2 flush_file_lines([file], [eol])
2843 Write out to a file previously read by read_file_lines to disk (except
2844 for those marked readonly). The parameters are :
2846 =item file - The file to flush out.
2848 =item eof - End-of-line character for each line. Defaults to \n.
2851 sub flush_file_lines
2855 local $trans = &translate_filename($_[0]);
2856 $main::file_cache{$trans} ||
2857 &error("flush_file_lines called on non-loaded file $trans");
2858 push(@files, $trans);
2861 @files = ( keys %main::file_cache );
2863 foreach my $f (@files) {
2864 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2865 if (!$main::file_cache_noflush{$f}) {
2866 no warnings; # XXX Bareword file handles should go away
2867 &open_tempfile(FLUSHFILE, ">$f");
2868 foreach my $line (@{$main::file_cache{$f}}) {
2869 (print FLUSHFILE $line,$eol) ||
2870 &error(&text("efilewrite", $f, $!));
2872 &close_tempfile(FLUSHFILE);
2874 delete($main::file_cache{$f});
2875 delete($main::file_cache_noflush{$f});
2879 =head2 unflush_file_lines(file)
2881 Clear the internal cache of some given file, previously read by read_file_lines.
2884 sub unflush_file_lines
2886 my $realfile = &translate_filename($_[0]);
2887 delete($main::file_cache{$realfile});
2888 delete($main::file_cache_noflush{$realfile});
2891 =head2 unix_user_input(fieldname, user, [form])
2893 Returns HTML for an input to select a Unix user. By default this is a text
2894 box with a user popup button next to it.
2899 if (defined(&theme_unix_user_input)) {
2900 return &theme_unix_user_input(@_);
2902 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2903 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2906 =head2 unix_group_input(fieldname, user, [form])
2908 Returns HTML for an input to select a Unix group. By default this is a text
2909 box with a group popup button next to it.
2912 sub unix_group_input
2914 if (defined(&theme_unix_group_input)) {
2915 return &theme_unix_group_input(@_);
2917 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2918 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2921 =head2 hlink(text, page, [module], [width], [height])
2923 Returns HTML for a link that when clicked on pops up a window for a Webmin
2924 help page. The parameters are :
2926 =item text - Text for the link.
2928 =item page - Help page code, such as 'intro'.
2930 =item module - Module the help page is in. Defaults to the current module.
2932 =item width - Width of the help popup window. Defaults to 600 pixels.
2934 =item height - Height of the help popup window. Defaults to 400 pixels.
2936 The actual help pages are in each module's help sub-directory, in files with
2942 if (defined(&theme_hlink)) {
2943 return &theme_hlink(@_);
2945 my $mod = $_[2] ? $_[2] : &get_module_name();
2946 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2947 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2948 return "<a onClick='window.open(\"$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>";
2951 =head2 user_chooser_button(field, multiple, [form])
2953 Returns HTML for a javascript button for choosing a Unix user or users.
2954 The parameters are :
2956 =item field - Name of the HTML field to place the username into.
2958 =item multiple - Set to 1 if multiple users can be selected.
2960 =item form - Index of the form on the page.
2963 sub user_chooser_button
2965 return undef if (!&supports_users());
2966 return &theme_user_chooser_button(@_)
2967 if (defined(&theme_user_chooser_button));
2968 my $form = defined($_[2]) ? $_[2] : 0;
2969 my $w = $_[1] ? 500 : 300;
2971 if ($_[1] && $gconfig{'db_sizeusers'}) {
2972 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2974 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2975 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2977 return "<input type=button onClick='ifield = form.$_[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";
2980 =head2 group_chooser_button(field, multiple, [form])
2982 Returns HTML for a javascript button for choosing a Unix group or groups
2983 The parameters are :
2985 =item field - Name of the HTML field to place the group name into.
2987 =item multiple - Set to 1 if multiple groups can be selected.
2989 =item form - Index of the form on the page.
2992 sub group_chooser_button
2994 return undef if (!&supports_users());
2995 return &theme_group_chooser_button(@_)
2996 if (defined(&theme_group_chooser_button));
2997 my $form = defined($_[2]) ? $_[2] : 0;
2998 my $w = $_[1] ? 500 : 300;
3000 if ($_[1] && $gconfig{'db_sizeusers'}) {
3001 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
3003 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
3004 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
3006 return "<input type=button onClick='ifield = form.$_[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";
3009 =head2 foreign_check(module, [api-only])
3011 Checks if some other module exists and is supported on this OS. The parameters
3014 =item module - Name of the module to check.
3016 =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.
3021 my ($mod, $api) = @_;
3023 my $mdir = &module_root_directory($mod);
3024 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
3025 return &check_os_support(\%minfo, undef, undef, $api);
3028 =head2 foreign_exists(module)
3030 Checks if some other module exists. The module parameter is the short module
3036 my $mdir = &module_root_directory($_[0]);
3037 return -r "$mdir/module.info";
3040 =head2 foreign_available(module)
3042 Returns 1 if some module is installed, and acessible to the current user. The
3043 module parameter is the module directory name.
3046 sub foreign_available
3048 return 0 if (!&foreign_check($_[0]) &&
3049 !$gconfig{'available_even_if_no_support'});
3050 my %foreign_module_info = &get_module_info($_[0]);
3052 # Check list of allowed modules
3054 &read_acl(\%acl, undef, [ $base_remote_user ]);
3055 return 0 if (!$acl{$base_remote_user,$_[0]} &&
3056 !$acl{$base_remote_user,'*'});
3058 # Check for usermod restrictions
3059 my @usermods = &list_usermods();
3060 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
3062 if (&get_product_name() eq "webmin") {
3063 # Check if the user has any RBAC privileges in this module
3064 if (&supports_rbac($_[0]) &&
3065 &use_rbac_module_acl(undef, $_[0])) {
3066 # RBAC is enabled for this user and module - check if he
3068 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
3069 return 0 if (!$rbacs);
3071 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
3072 # If denying access to modules not specifically allowed by
3073 # RBAC, then prevent access
3078 # Check readonly support
3079 if (&is_readonly_mode()) {
3080 return 0 if (!$foreign_module_info{'readonly'});
3083 # Check if theme vetos
3084 if (defined(&theme_foreign_available)) {
3085 return 0 if (!&theme_foreign_available($_[0]));
3088 # Check if licence module vetos
3089 if ($main::licence_module) {
3090 return 0 if (!&foreign_call($main::licence_module,
3091 "check_module_licence", $_[0]));
3097 =head2 foreign_require(module, [file], [package])
3099 Brings in functions from another module, and places them in the Perl namespace
3100 with the same name as the module. The parameters are :
3102 =item module - The source module's directory name, like sendmail.
3104 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
3106 =item package - Perl package to place the module's functions and global variables in.
3108 If the original module name contains dashes, they will be replaced with _ in
3114 my ($mod, $file, $pkg) = @_;
3115 $pkg ||= $mod || "global";
3116 $pkg =~ s/[^A-Za-z0-9]/_/g;
3119 push(@files, $file);
3123 my %minfo = &get_module_info($mod);
3124 if ($minfo{'library'}) {
3125 @files = split(/\s+/, $minfo{'library'});
3128 @files = ( $mod."-lib.pl" );
3131 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3132 return 1 if (!@files);
3133 foreach my $f (@files) {
3134 $main::done_foreign_require{$pkg,$f}++;
3137 my $mdir = &module_root_directory($mod);
3138 @INC = &unique($mdir, @INC);
3139 -d $mdir || &error("Module $mod does not exist");
3140 if (!&get_module_name() && $mod) {
3143 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3144 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3145 my $code = "package $pkg; ".
3146 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3147 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3148 foreach my $f (@files) {
3149 $code .= "do '$mdir/$f' || die \$@; ";
3152 if (defined($old_fmn)) {
3153 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3156 delete($ENV{'FOREIGN_MODULE_NAME'});
3158 if (defined($old_frd)) {
3159 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3162 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3165 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3169 =head2 foreign_call(module, function, [arg]*)
3171 Call a function in another module. The module parameter is the target module
3172 directory name, function is the perl sub to call, and the remaining parameters
3173 are the arguments. However, unless you need to call a function whose name
3174 is dynamic, it is better to use Perl's cross-module function call syntax
3175 like module::function(args).
3180 my $pkg = $_[0] || "global";
3181 $pkg =~ s/[^A-Za-z0-9]/_/g;
3182 my @args = @_[2 .. @_-1];
3183 $main::foreign_args = \@args;
3184 my @rv = eval <<EOF;
3186 &$_[1](\@{\$main::foreign_args});
3188 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3189 return wantarray ? @rv : $rv[0];
3192 =head2 foreign_config(module, [user-config])
3194 Get the configuration from another module, and return it as a hash. If the
3195 user-config parameter is set to 1, returns the Usermin user-level preferences
3196 for the current user instead.
3201 my ($mod, $uc) = @_;
3204 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3205 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3206 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3209 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3214 =head2 foreign_installed(module, mode)
3216 Checks if the server for some module is installed, and possibly also checks
3217 if the module has been configured by Webmin.
3218 For mode 1, returns 2 if the server is installed and configured for use by
3219 Webmin, 1 if installed but not configured, or 0 otherwise.
3220 For mode 0, returns 1 if installed, 0 if not.
3221 If the module does not provide an install_check.pl script, assumes that
3222 the server is installed.
3225 sub foreign_installed
3227 my ($mod, $configured) = @_;
3228 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3230 return $main::foreign_installed_cache{$mod,$configured};
3234 if (!&foreign_check($mod)) {
3239 my $mdir = &module_root_directory($mod);
3240 if (!-r "$mdir/install_check.pl") {
3241 # Not known, assume OK
3242 $rv = $configured ? 2 : 1;
3245 # Call function to check
3246 &foreign_require($mod, "install_check.pl");
3247 $rv = &foreign_call($mod, "is_installed", $configured);
3250 $main::foreign_installed_cache{$mod,$configured} = $rv;
3255 =head2 foreign_defined(module, function)
3257 Returns 1 if some function is defined in another module. In general, it is
3258 simpler to use the syntax &defined(module::function) instead.
3264 $pkg =~ s/[^A-Za-z0-9]/_/g;
3265 my $func = "${pkg}::$_[1]";
3266 return defined(&$func);
3269 =head2 get_system_hostname([short])
3271 Returns the hostname of this system. If the short parameter is set to 1,
3272 then the domain name is not prepended - otherwise, Webmin will attempt to get
3273 the fully qualified hostname, like foo.example.com.
3276 sub get_system_hostname
3279 if (!$main::get_system_hostname[$m]) {
3280 if ($gconfig{'os_type'} ne 'windows') {
3281 # Try some common Linux hostname files first
3283 if ($gconfig{'os_type'} eq 'redhat-linux') {
3285 &read_env_file("/etc/sysconfig/network", \%nc);
3286 if ($nc{'HOSTNAME'}) {
3287 $fromfile = $nc{'HOSTNAME'};
3290 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3291 my $hn = &read_file_contents("/etc/hostname");
3297 elsif ($gconfig{'os_type'} eq 'open-linux') {
3298 my $hn = &read_file_contents("/etc/HOSTNAME");
3304 elsif ($gconfig{'os_type'} eq 'solaris') {
3305 my $hn = &read_file_contents("/etc/nodename");
3312 # If we found a hostname, use it if value
3313 if ($fromfile && ($m || $fromfile =~ /\./)) {
3315 $fromfile =~ s/\..*$//;
3317 $main::get_system_hostname[$m] = $fromfile;
3321 # Can use hostname command on Unix
3322 &execute_command("hostname", undef,
3323 \$main::get_system_hostname[$m], undef, 0, 1);
3324 chop($main::get_system_hostname[$m]);
3326 eval "use Sys::Hostname";
3328 $main::get_system_hostname[$m] = eval "hostname()";
3330 if ($@ || !$main::get_system_hostname[$m]) {
3331 $main::get_system_hostname[$m] = "UNKNOWN";
3334 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3335 $gconfig{'os_type'} =~ /linux$/ &&
3336 !$gconfig{'no_hostname_f'} && !$_[0]) {
3337 # Try with -f flag to get fully qualified name
3339 my $ex = &execute_command("hostname -f", undef, \$flag,
3342 if ($ex || $flag eq "") {
3343 # -f not supported! We have probably set the
3344 # hostname to just '-f'. Fix the problem
3347 &execute_command("hostname ".
3348 quotemeta($main::get_system_hostname[$m]),
3349 undef, undef, undef, 0, 1);
3353 $main::get_system_hostname[$m] = $flag;
3358 # On Windows, try computername environment variable
3359 return $ENV{'computername'} if ($ENV{'computername'});
3360 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3362 # Fall back to net name command
3363 my $out = `net name 2>&1`;
3364 if ($out =~ /\-+\r?\n(\S+)/) {
3365 $main::get_system_hostname[$m] = $1;
3368 $main::get_system_hostname[$m] = "windows";
3372 return $main::get_system_hostname[$m];
3375 =head2 get_webmin_version
3377 Returns the version of Webmin currently being run, such as 1.450.
3380 sub get_webmin_version
3382 if (!$get_webmin_version) {
3383 open(VERSION, "$root_directory/version") || return 0;
3384 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3387 return $get_webmin_version;
3390 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3392 Returns a hash containing access control options for the given user and module.
3393 By default the current username and module name are used. If the no-rbac flag
3394 is given, the permissions will not be updated based on the user's RBAC role
3395 (as seen on Solaris). If the no-default flag is given, default permissions for
3396 the module will not be included.
3401 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3402 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3403 my $mdir = &module_root_directory($m);
3406 # Read default ACL first, to be overridden by per-user settings
3407 &read_file_cached("$mdir/defaultacl", \%rv);
3409 # If this isn't a master admin user, apply the negative permissions
3410 # so that he doesn't un-expectedly gain access to new features
3412 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3413 if ($gaccess{'negative'}) {
3414 &read_file_cached("$mdir/negativeacl", \%rv);
3418 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3419 # RBAC overrides exist for this user in this module
3420 my $rbac = &get_rbac_module_acl(
3421 defined($_[0]) ? $_[0] : $remote_user, $m);
3422 foreach my $r (keys %$rbac) {
3423 $rv{$r} = $rbac->{$r};
3426 elsif ($gconfig{"risk_$u"} && $m) {
3427 # ACL is defined by user's risk level
3428 my $rf = $gconfig{"risk_$u"}.'.risk';
3429 &read_file_cached("$mdir/$rf", \%rv);
3431 my $sf = $gconfig{"skill_$u"}.'.skill';
3432 &read_file_cached("$mdir/$sf", \%rv);
3435 # Use normal Webmin ACL, if a user is set
3436 my $userdb = &get_userdb_string();
3438 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3439 # Look for this user in the user/group DB, if one is defined
3440 # and if the user might be in the DB
3441 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3442 ref($dbh) || &error(&text('euserdbacl', $dbh));
3443 if ($proto eq "mysql" || $proto eq "postgresql") {
3444 # Find the user in the SQL DB
3445 my $cmd = $dbh->prepare(
3446 "select id from webmin_user where name = ?");
3447 $cmd && $cmd->execute($u) ||
3448 &error(&text('euserdbacl', $dbh->errstr));
3449 my ($id) = $cmd->fetchrow();
3450 $foundindb = 1 if (defined($id));
3453 # Fetch ACLs with SQL
3455 my $cmd = $dbh->prepare(
3456 "select attr,value from webmin_user_acl ".
3457 "where id = ? and module = ?");
3458 $cmd && $cmd->execute($id, $m) ||
3459 &error(&text('euserdbacl', $dbh->errstr));
3460 while(my ($a, $v) = $cmd->fetchrow()) {
3466 elsif ($proto eq "ldap") {
3468 my $rv = $dbh->search(
3470 filter => '(&(cn='.$u.')(objectClass='.
3471 $args->{'userclass'}.'))',
3473 if (!$rv || $rv->code) {
3474 &error(&text('euserdbacl',
3475 $rv ? $rv->error : "Unknown error"));
3477 my ($user) = $rv->all_entries;
3479 # Find ACL sub-object for the module
3480 my $ldapm = $m || "global";
3482 my $rv = $dbh->search(
3483 base => $user->dn(),
3484 filter => '(cn='.$ldapm.')',
3486 if (!$rv || $rv->code) {
3487 &error(&text('euserdbacl',
3488 $rv ? $rv->error : "Unknown error"));
3490 my ($acl) = $rv->all_entries;
3492 foreach my $av ($acl->get_value(
3493 'webminAclEntry')) {
3494 my ($a, $v) = split(/=/, $av,2);
3500 &disconnect_userdb($userdb, $dbh);
3504 # Read from local files
3505 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3506 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3508 "$config_directory/$m/$remote_user.acl",\%rv);
3512 if ($tconfig{'preload_functions'}) {
3513 &load_theme_library();
3515 if (defined(&theme_get_module_acl)) {
3516 %rv = &theme_get_module_acl($u, $m, \%rv);
3521 =head2 get_group_module_acl(group, [module], [no-default])
3523 Returns the ACL for a Webmin group, in an optional module (which defaults to
3524 the current module).
3527 sub get_group_module_acl
3530 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3531 my $mdir = &module_root_directory($m);
3534 &read_file_cached("$mdir/defaultacl", \%rv);
3537 my $userdb = &get_userdb_string();
3540 # Look for this group in the user/group DB
3541 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3542 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3543 if ($proto eq "mysql" || $proto eq "postgresql") {
3544 # Find the group in the SQL DB
3545 my $cmd = $dbh->prepare(
3546 "select id from webmin_group where name = ?");
3547 $cmd && $cmd->execute($g) ||
3548 &error(&text('egroupdbacl', $dbh->errstr));
3549 my ($id) = $cmd->fetchrow();
3550 $foundindb = 1 if (defined($id));
3553 # Fetch ACLs with SQL
3555 my $cmd = $dbh->prepare(
3556 "select attr,value from webmin_group_acl ".
3557 "where id = ? and module = ?");
3558 $cmd && $cmd->execute($id, $m) ||
3559 &error(&text('egroupdbacl', $dbh->errstr));
3560 while(my ($a, $v) = $cmd->fetchrow()) {
3566 elsif ($proto eq "ldap") {
3567 # Find group in LDAP
3568 my $rv = $dbh->search(
3570 filter => '(&(cn='.$g.')(objectClass='.
3571 $args->{'groupclass'}.'))',
3573 if (!$rv || $rv->code) {
3574 &error(&text('egroupdbacl',
3575 $rv ? $rv->error : "Unknown error"));
3577 my ($group) = $rv->all_entries;
3579 # Find ACL sub-object for the module
3580 my $ldapm = $m || "global";
3582 my $rv = $dbh->search(
3583 base => $group->dn(),
3584 filter => '(cn='.$ldapm.')',
3586 if (!$rv || $rv->code) {
3587 &error(&text('egroupdbacl',
3588 $rv ? $rv->error : "Unknown error"));
3590 my ($acl) = $rv->all_entries;
3592 foreach my $av ($acl->get_value(
3593 'webminAclEntry')) {
3594 my ($a, $v) = split(/=/, $av, 2);
3600 &disconnect_userdb($userdb, $dbh);
3603 # Read from local files
3604 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3606 if (defined(&theme_get_module_acl)) {
3607 %rv = &theme_get_module_acl($g, $m, \%rv);
3612 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3614 Updates the acl hash for some user and module. The parameters are :
3616 =item acl - Hash reference for the new access control options, or undef to clear
3618 =item user - User to update, defaulting to the current user.
3620 =item module - Module to update, defaulting to the caller.
3622 =item never-update-group - Never update the user's group's ACL
3627 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3628 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3629 if (!$_[3] && &foreign_check("acl")) {
3630 # Check if this user is a member of a group, and if he gets the
3631 # module from a group. If so, update its ACL as well
3632 &foreign_require("acl", "acl-lib.pl");
3634 foreach my $g (&acl::list_groups()) {
3635 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3636 &indexof($m, @{$g->{'modules'}}) >= 0) {
3642 &save_group_module_acl($_[0], $group->{'name'}, $m);
3646 my $userdb = &get_userdb_string();
3648 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3649 # Look for this user in the user/group DB
3650 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3651 ref($dbh) || &error(&text('euserdbacl', $dbh));
3652 if ($proto eq "mysql" || $proto eq "postgresql") {
3653 # Find the user in the SQL DB
3654 my $cmd = $dbh->prepare(
3655 "select id from webmin_user where name = ?");
3656 $cmd && $cmd->execute($u) ||
3657 &error(&text('euserdbacl2', $dbh->errstr));
3658 my ($id) = $cmd->fetchrow();
3659 $foundindb = 1 if (defined($id));
3662 # Replace ACLs for user
3664 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3665 "where id = ? and module = ?");
3666 $cmd && $cmd->execute($id, $m) ||
3667 &error(&text('euserdbacl', $dbh->errstr));
3670 my $cmd = $dbh->prepare(
3671 "insert into webmin_user_acl ".
3672 "(id,module,attr,value) values (?,?,?,?)");
3673 $cmd || &error(&text('euserdbacl2',
3675 foreach my $a (keys %{$_[0]}) {
3676 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3677 &error(&text('euserdbacl2',
3684 elsif ($proto eq "ldap") {
3685 # Find the user in LDAP
3686 my $rv = $dbh->search(
3688 filter => '(&(cn='.$u.')(objectClass='.
3689 $args->{'userclass'}.'))',
3691 if (!$rv || $rv->code) {
3692 &error(&text('euserdbacl',
3693 $rv ? $rv->error : "Unknown error"));
3695 my ($user) = $rv->all_entries;
3698 # Find the ACL sub-object for the module
3700 my $ldapm = $m || "global";
3701 my $rv = $dbh->search(
3702 base => $user->dn(),
3703 filter => '(cn='.$ldapm.')',
3705 if (!$rv || $rv->code) {
3706 &error(&text('euserdbacl',
3707 $rv ? $rv->error : "Unknown error"));
3709 my ($acl) = $rv->all_entries;
3712 foreach my $a (keys %{$_[0]}) {
3713 push(@al, $a."=".$_[0]->{$a});
3717 $rv = $dbh->modify($acl->dn(),
3718 replace => { "webminAclEntry", \@al });
3722 my @attrs = ( "cn", $ldapm,
3723 "objectClass", "webminAcl",
3724 "webminAclEntry", \@al );
3725 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3728 if (!$rv || $rv->code) {
3729 &error(&text('euserdbacl2',
3730 $rv ? $rv->error : "Unknown error"));
3734 &disconnect_userdb($userdb, $dbh);
3738 # Save ACL to local file
3739 if (!-d "$config_directory/$m") {
3740 mkdir("$config_directory/$m", 0755);
3743 &write_file("$config_directory/$m/$u.acl", $_[0]);
3746 &unlink_file("$config_directory/$m/$u.acl");
3751 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3753 Updates the acl hash for some group and module. The parameters are :
3755 =item acl - Hash reference for the new access control options.
3757 =item group - Group name to update.
3759 =item module - Module to update, defaulting to the caller.
3761 =item never-update-group - Never update the parent group's ACL
3764 sub save_group_module_acl
3767 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3768 if (!$_[3] && &foreign_check("acl")) {
3769 # Check if this group is a member of a group, and if it gets the
3770 # module from a group. If so, update the parent ACL as well
3771 &foreign_require("acl", "acl-lib.pl");
3773 foreach my $pg (&acl::list_groups()) {
3774 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3775 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3781 &save_group_module_acl($_[0], $group->{'name'}, $m);
3785 my $userdb = &get_userdb_string();
3788 # Look for this group in the user/group DB
3789 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3790 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3791 if ($proto eq "mysql" || $proto eq "postgresql") {
3792 # Find the group in the SQL DB
3793 my $cmd = $dbh->prepare(
3794 "select id from webmin_group where name = ?");
3795 $cmd && $cmd->execute($g) ||
3796 &error(&text('egroupdbacl2', $dbh->errstr));
3797 my ($id) = $cmd->fetchrow();
3798 $foundindb = 1 if (defined($id));
3801 # Replace ACLs for group
3803 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3804 "where id = ? and module = ?");
3805 $cmd && $cmd->execute($id, $m) ||
3806 &error(&text('egroupdbacl', $dbh->errstr));
3809 my $cmd = $dbh->prepare(
3810 "insert into webmin_group_acl ".
3811 "(id,module,attr,value) values (?,?,?,?)");
3812 $cmd || &error(&text('egroupdbacl2',
3814 foreach my $a (keys %{$_[0]}) {
3815 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3816 &error(&text('egroupdbacl2',
3823 elsif ($proto eq "ldap") {
3824 # Find the group in LDAP
3825 my $rv = $dbh->search(
3827 filter => '(&(cn='.$g.')(objectClass='.
3828 $args->{'groupclass'}.'))',
3830 if (!$rv || $rv->code) {
3831 &error(&text('egroupdbacl',
3832 $rv ? $rv->error : "Unknown error"));
3834 my ($group) = $rv->all_entries;
3836 my $ldapm = $m || "global";
3838 # Find the ACL sub-object for the module
3840 my $rv = $dbh->search(
3841 base => $group->dn(),
3842 filter => '(cn='.$ldapm.')',
3844 if (!$rv || $rv->code) {
3845 &error(&text('egroupdbacl',
3846 $rv ? $rv->error : "Unknown error"));
3848 my ($acl) = $rv->all_entries;
3851 foreach my $a (keys %{$_[0]}) {
3852 push(@al, $a."=".$_[0]->{$a});
3856 $rv = $dbh->modify($acl->dn(),
3857 replace => { "webminAclEntry", \@al });
3861 my @attrs = ( "cn", $ldapm,
3862 "objectClass", "webminAcl",
3863 "webminAclEntry", \@al );
3864 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
3867 if (!$rv || $rv->code) {
3868 &error(&text('egroupdbacl2',
3869 $rv ? $rv->error : "Unknown error"));
3873 &disconnect_userdb($userdb, $dbh);
3877 # Save ACL to local file
3878 if (!-d "$config_directory/$m") {
3879 mkdir("$config_directory/$m", 0755);
3882 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3885 &unlink_file("$config_directory/$m/$g.gacl");
3892 This function must be called by all Webmin CGI scripts, either directly or
3893 indirectly via a per-module lib.pl file. It performs a number of initialization
3894 and housekeeping tasks, such as working out the module name, checking that the
3895 current user has access to the module, and populating global variables. Some
3896 of the variables set include :
3898 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3900 =item $var_directory - Base logs directory, typically /var/webmin
3902 =item %config - Per-module configuration.
3904 =item %gconfig - Global configuration.
3906 =item $scriptname - Base name of the current perl script.
3908 =item $module_name - The name of the current module.
3910 =item $module_config_directory - The config directory for this module.
3912 =item $module_config_file - The config file for this module.
3914 =item $module_root_directory - This module's code directory.
3916 =item $webmin_logfile - The detailed logfile for webmin.
3918 =item $remote_user - The actual username used to login to webmin.
3920 =item $base_remote_user - The username whose permissions are in effect.
3922 =item $current_theme - The theme currently in use.
3924 =item $root_directory - The first root directory of this webmin install.
3926 =item @root_directories - All root directories for this webmin install.
3931 # Record first process ID that called this, so we know when it exited to clean
3933 $main::initial_process_id ||= $$;
3935 # Configuration and spool directories
3936 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3937 die "WEBMIN_CONFIG not set";
3939 $config_directory = $ENV{'WEBMIN_CONFIG'};
3940 if (!defined($ENV{'WEBMIN_VAR'})) {
3941 open(VARPATH, "$config_directory/var-path");
3942 chop($var_directory = <VARPATH>);
3946 $var_directory = $ENV{'WEBMIN_VAR'};
3948 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3949 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3951 if ($ENV{'SESSION_ID'}) {
3952 # Hide this variable from called programs, but keep it for internal use
3953 $main::session_id = $ENV{'SESSION_ID'};
3954 delete($ENV{'SESSION_ID'});
3956 if ($ENV{'REMOTE_PASS'}) {
3957 # Hide the password too
3958 $main::remote_pass = $ENV{'REMOTE_PASS'};
3959 delete($ENV{'REMOTE_PASS'});
3962 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3963 # Looks like we are running setuid, but the real UID hasn't been set.
3964 # Do so now, so that executed programs don't get confused
3969 # Read the webmin global config file. This contains the OS type and version,
3970 # OS specific configuration and global options such as proxy servers
3971 $config_file = "$config_directory/config";
3973 &read_file_cached($config_file, \%gconfig);
3974 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3975 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3977 # If debugging is enabled, open the debug log
3978 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3979 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3980 if ($gconfig{'debug_size'}) {
3981 my @st = stat($dlog);
3982 if ($st[7] > $gconfig{'debug_size'}) {
3983 rename($dlog, $dlog.".0");
3986 open(main::DEBUGLOG, ">>$dlog");
3987 $main::opened_debug_log = 1;
3989 if ($gconfig{'debug_what_start'}) {
3990 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3991 $main::debug_log_start_time = time();
3992 &webmin_debug_log("START", "script=$script_name");
3993 $main::debug_log_start_module = $module_name;
3997 # Set PATH and LD_LIBRARY_PATH
3998 if ($gconfig{'path'}) {
3999 if ($gconfig{'syspath'}) {
4001 $ENV{'PATH'} = $gconfig{'path'};
4005 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
4008 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
4010 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
4011 if ($gconfig{'http_proxy'}) {
4012 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
4014 if ($gconfig{'ftp_proxy'}) {
4015 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
4017 if ($gconfig{'noproxy'}) {
4018 $ENV{'no_proxy'} = $gconfig{'noproxy'};
4021 # Find all root directories
4023 if (&get_miniserv_config(\%miniserv)) {
4024 @root_directories = ( $miniserv{'root'} );
4025 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
4026 push(@root_directories, $miniserv{"extraroot_$i"});
4030 # Work out which module we are in, and read the per-module config file
4031 $0 =~ s/\\/\//g; # Force consistent path on Windows
4032 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
4033 # In a foreign call - use the module name given
4034 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
4035 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
4036 @root_directories = ( $root_directory ) if (!@root_directories);
4038 elsif ($ENV{'SCRIPT_NAME'}) {
4039 my $sn = $ENV{'SCRIPT_NAME'};
4040 $sn =~ s/^$gconfig{'webprefix'}//
4041 if (!$gconfig{'webprefixnoredir'});
4042 if ($sn =~ /^\/([^\/]+)\//) {
4043 # Get module name from CGI path
4046 if ($ENV{'SERVER_ROOT'}) {
4047 $root_directory = $ENV{'SERVER_ROOT'};
4049 elsif ($ENV{'SCRIPT_FILENAME'}) {
4050 $root_directory = $ENV{'SCRIPT_FILENAME'};
4051 $root_directory =~ s/$sn$//;
4053 @root_directories = ( $root_directory ) if (!@root_directories);
4056 # Get root directory from miniserv.conf, and deduce module name from $0
4057 $root_directory = $root_directories[0];
4059 foreach my $r (@root_directories) {
4060 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
4061 # Under a module directory
4066 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
4072 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
4075 # Work out of this is a web, command line or cron job
4076 if (!$main::webmin_script_type) {
4077 if ($ENV{'SCRIPT_NAME'}) {
4079 $main::webmin_script_type = 'web';
4082 # Cron jobs have no TTY
4083 if ($gconfig{'os_type'} eq 'windows' ||
4084 open(DEVTTY, ">/dev/tty")) {
4085 $main::webmin_script_type = 'cmd';
4089 $main::webmin_script_type = 'cron';
4094 # Set the umask based on config
4095 if ($gconfig{'umask'} && !$main::umask_already++) {
4096 umask(oct($gconfig{'umask'}));
4099 # If this is a cron job or other background task, set the nice level
4100 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4102 if ($gconfig{'nice'}) {
4103 eval 'POSIX::nice($gconfig{\'nice\'});';
4106 # Set IO scheduling class and priority
4107 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4109 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4110 if ($gconfig{'sclass'} ne '');
4111 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4112 if ($gconfig{'sprio'} ne '');
4114 &execute_command("$cmd >/dev/null 2>&1");
4117 $main::nice_already++;
4120 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4121 $base_remote_user = $u;
4122 $remote_user = $ENV{'REMOTE_USER'};
4124 # Work out if user is definitely in the DB, and if so get his attrs
4125 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4126 %remote_user_attrs = ( );
4127 if ($remote_user_proto) {
4128 my $userdb = &get_userdb_string();
4129 my ($dbh, $proto, $prefix, $args) =
4130 $userdb ? &connect_userdb($userdb) : ( );
4132 if ($proto eq "mysql" || $proto eq "postgresql") {
4133 # Read attrs from SQL
4134 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 = ?");
4135 if ($cmd && $cmd->execute($base_remote_user)) {
4136 while(my ($attr, $value) = $cmd->fetchrow()) {
4137 $remote_user_attrs{$attr} = $value;
4142 elsif ($proto eq "ldap") {
4143 # Read attrs from LDAP
4144 my $rv = $dbh->search(
4146 filter => '(&(cn='.$base_remote_user.')'.
4148 $args->{'userclass'}.'))',
4150 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4152 foreach $la ($u->get_value('webminAttr')) {
4153 my ($attr, $value) = split(/=/, $la, 2);
4154 $remote_user_attrs{$attr} = $value;
4158 &disconnect_userdb($userdb, $dbh);
4163 # Find and load the configuration file for this module
4164 my (@ruinfo, $rgroup);
4165 $module_config_directory = "$config_directory/$module_name";
4166 if (&get_product_name() eq "usermin" &&
4167 -r "$module_config_directory/config.$remote_user") {
4169 $module_config_file = "$module_config_directory/config.$remote_user";
4171 elsif (&get_product_name() eq "usermin" &&
4172 (@ruinfo = getpwnam($remote_user)) &&
4173 ($rgroup = getgrgid($ruinfo[3])) &&
4174 -r "$module_config_directory/config.\@$rgroup") {
4175 # Based on group name
4176 $module_config_file = "$module_config_directory/config.\@$rgroup";
4180 $module_config_file = "$module_config_directory/config";
4183 &read_file_cached($module_config_file, \%config);
4185 # Fix up windows-specific substitutions in values
4186 foreach my $k (keys %config) {
4187 if ($config{$k} =~ /\$\{systemroot\}/) {
4188 my $root = &get_windows_root();
4189 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4194 # Record the initial module
4195 $main::initial_module_name ||= $module_name;
4197 # Set some useful variables
4199 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4200 $gconfig{'mobile_theme'} :
4201 defined($remote_user_attrs{'theme'}) ?
4202 $remote_user_attrs{'theme'} :
4203 defined($gconfig{'theme_'.$remote_user}) ?
4204 $gconfig{'theme_'.$remote_user} :
4205 defined($gconfig{'theme_'.$base_remote_user}) ?
4206 $gconfig{'theme_'.$base_remote_user} :
4208 @current_themes = split(/\s+/, $current_themes);
4209 $current_theme = $current_themes[0];
4210 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4211 $theme_root_directory = $theme_root_directories[0];
4212 @theme_configs = ( );
4213 foreach my $troot (@theme_root_directories) {
4215 &read_file_cached("$troot/config", \%onetconfig);
4216 &read_file_cached("$troot/config", \%tconfig);
4217 push(@theme_configs, \%onetconfig);
4219 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4220 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4222 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4223 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4225 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4226 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4227 if ($tconfig{'preload_functions'}) {
4228 # Force load of theme functions right now, if requested
4229 &load_theme_library();
4231 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4232 # Load the theme's Webmin:: package classes
4233 do "$theme_root_directory/$tconfig{'oofunctions'}";
4238 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4239 : "$var_directory/webmin.log";
4241 # Load language strings into %text
4242 my @langs = &list_languages();
4244 if ($gconfig{'acceptlang'}) {
4245 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4246 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4248 $accepted_lang = $al->{'lang'};
4253 $current_lang = $force_lang ? $force_lang :
4254 $accepted_lang ? $accepted_lang :
4255 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4256 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4257 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4258 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4259 foreach my $l (@langs) {
4260 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4262 @lang_order_list = &unique($default_lang,
4263 split(/:/, $current_lang_info->{'fallback'}),
4265 %text = &load_language($module_name);
4266 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4268 # Get the %module_info for this module
4270 my ($mi) = grep { $_->{'dir'} eq $module_name }
4271 &get_all_module_infos(2);
4272 %module_info = %$mi;
4273 $module_root_directory = &module_root_directory($module_name);
4276 if ($module_name && !$main::no_acl_check &&
4277 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4278 # Check if the HTTP user can access this module
4279 if (!&foreign_available($module_name)) {
4280 if (!&foreign_check($module_name)) {
4281 &error(&text('emodulecheck',
4282 "<i>$module_info{'desc'}</i>"));
4285 &error(&text('emodule', "<i>$u</i>",
4286 "<i>$module_info{'desc'}</i>"));
4289 $main::no_acl_check++;
4292 # Check the Referer: header for nasty redirects
4293 my @referers = split(/\s+/, $gconfig{'referers'});
4295 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4298 my $http_host = $ENV{'HTTP_HOST'};
4299 $http_host =~ s/:\d+$//;
4300 my $unsafe_index = $unsafe_index_cgi ||
4301 &get_module_variable('$unsafe_index_cgi');
4303 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4304 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4306 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4307 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4308 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4309 ($referer_site && $referer_site ne $http_host &&
4310 &indexof($referer_site, @referers) < 0 ||
4311 !$referer_site && $gconfig{'referers_none'}) &&
4312 !$trust_unknown_referers &&
4313 !&get_module_variable('$trust_unknown_referers')) {
4314 # Looks like a link from elsewhere .. show an error
4315 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4317 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4318 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4319 if ($referer_site) {
4321 print &text('referer_warn',
4322 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
4324 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4325 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4328 # No referer info given
4329 print &text('referer_warn_unknown', $url),"<p>\n";
4330 print &text('referer_fix1u'),"<p>\n";
4331 print &text('referer_fix2u'),"<p>\n";
4335 &footer("/", $text{'index'});
4338 $main::no_referers_check++;
4339 $main::completed_referers_check++;
4341 # Call theme post-init
4342 if (defined(&theme_post_init_config)) {
4343 &theme_post_init_config(@_);
4346 # Record that we have done the calling library in this package
4347 my ($callpkg, $lib) = caller();
4349 $main::done_foreign_require{$callpkg,$lib} = 1;
4351 # If a licence checking is enabled, do it now
4352 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4353 &foreign_check($gconfig{'licence_module'}) &&
4354 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4355 my $oldpwd = &get_current_dir();
4356 $main::done_licence_module_check++;
4357 $main::licence_module = $gconfig{'licence_module'};
4358 &foreign_require($main::licence_module, "licence_check.pl");
4359 ($main::licence_status, $main::licence_message) =
4360 &foreign_call($main::licence_module, "check_licence");
4364 # Export global variables to caller
4365 if ($main::export_to_caller) {
4366 foreach my $v ('$config_file', '%gconfig', '$null_file',
4367 '$path_separator', '@root_directories',
4368 '$root_directory', '$module_name',
4369 '$base_remote_user', '$remote_user',
4370 '$remote_user_proto', '%remote_user_attrs',
4371 '$module_config_directory', '$module_config_file',
4372 '%config', '@current_themes', '$current_theme',
4373 '@theme_root_directories', '$theme_root_directory',
4374 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4375 '$webmin_logfile', '$current_lang',
4376 '$current_lang_info', '@lang_order_list', '%text',
4377 '%module_info', '$module_root_directory') {
4378 my ($vt, $vn) = split('', $v, 2);
4379 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4386 =head2 load_language([module], [directory])
4388 Returns a hashtable mapping text codes to strings in the appropriate language,
4389 based on the $current_lang global variable, which is in turn set based on
4390 the Webmin user's selection. The optional module parameter tells the function
4391 which module to load strings for, and defaults to the calling module. The
4392 optional directory parameter can be used to load strings from a directory
4395 In regular module development you will never need to call this function
4396 directly, as init_config calls it for you, and places the module's strings
4397 into the %text hash.
4403 my $root = $root_directory;
4404 my $ol = $gconfig{'overlang'};
4405 my ($dir) = ($_[1] || "lang");
4407 # Read global lang files
4408 foreach my $o (@lang_order_list) {
4409 my $ok = &read_file_cached("$root/$dir/$o", \%text);
4410 return () if (!$ok && $o eq $default_lang);
4413 foreach my $o (@lang_order_list) {
4414 &read_file_cached("$root/$ol/$o", \%text);
4417 &read_file_cached("$config_directory/custom-lang", \%text);
4420 # Read module's lang files
4421 my $mdir = &module_root_directory($_[0]);
4422 foreach my $o (@lang_order_list) {
4423 &read_file_cached("$mdir/$dir/$o", \%text);
4426 foreach $o (@lang_order_list) {
4427 &read_file_cached("$mdir/$ol/$o", \%text);
4430 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4432 foreach $k (keys %text) {
4433 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4436 if (defined(&theme_load_language)) {
4437 &theme_load_language(\%text, $_[0]);
4442 =head2 text_subs(string)
4444 Used internally by load_language to expand $code substitutions in language
4450 if (substr($_[0], 0, 8) eq "include:") {
4453 open(INCLUDE, substr($_[0], 8));
4461 my $t = $_[1]->{$_[0]};
4462 return defined($t) ? $t : '$'.$_[0];
4466 =head2 text(message, [substitute]+)
4468 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4469 the substitute parameters. This makes it easy to use strings with placeholders
4470 that get replaced with programmatically generated text. For example :
4472 print &text('index_hello', $remote_user),"<p>\n";
4477 my $t = &get_module_variable('%text', 1);
4478 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4479 for(my $i=1; $i<@_; $i++) {
4480 $rv =~ s/\$$i/$_[$i]/g;
4485 =head2 encode_base64(string)
4487 Encodes a string into base64 format, for use in MIME email or HTTP
4488 authorization headers.
4494 pos($_[0]) = 0; # ensure start at the beginning
4495 while ($_[0] =~ /(.{1,57})/gs) {
4496 $res .= substr(pack('u57', $1), 1)."\n";
4499 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4500 my $padding = (3 - length($_[0]) % 3) % 3;
4501 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4505 =head2 decode_base64(string)
4507 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4514 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4515 if (length($str) % 4) {
4518 $str =~ s/=+$//; # remove padding
4519 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4520 while ($str =~ /(.{1,60})/gs) {
4521 my $len = chr(32 + length($1)*3/4); # compute length byte
4522 $res .= unpack("u", $len . $1 ); # uudecode
4527 =head2 get_module_info(module, [noclone], [forcache])
4529 Returns a hash containg details of the given module. Some useful keys are :
4531 =item dir - The module directory, like sendmail.
4533 =item desc - Human-readable description, in the current users' language.
4535 =item version - Optional module version number.
4537 =item os_support - List of supported operating systems and versions.
4539 =item category - Category on Webmin's left menu, like net.
4544 return () if ($_[0] =~ /^\./);
4545 my (%rv, $clone, $o);
4546 my $mdir = &module_root_directory($_[0]);
4547 &read_file_cached("$mdir/module.info", \%rv) || return ();
4549 # A clone is a module that links to another directory under the root
4550 foreach my $r (@root_directories) {
4551 if (&is_under_directory($r, $mdir)) {
4557 foreach $o (@lang_order_list) {
4558 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4559 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4561 if ($clone && !$_[1] && $config_directory) {
4562 $rv{'clone'} = $rv{'desc'};
4563 &read_file("$config_directory/$_[0]/clone", \%rv);
4566 my %module_categories;
4567 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4568 my $pn = &get_product_name();
4569 if (defined($rv{'category_'.$pn})) {
4570 # Can override category for webmin/usermin
4571 $rv{'category'} = $rv{'category_'.$pn};
4573 $rv{'realcategory'} = $rv{'category'};
4574 $rv{'category'} = $module_categories{$_[0]}
4575 if (defined($module_categories{$_[0]}));
4577 # Apply description overrides
4578 $rv{'realdesc'} = $rv{'desc'};
4580 &read_file_cached("$config_directory/webmin.descs", \%descs);
4581 if ($descs{$_[0]." ".$current_lang}) {
4582 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4584 elsif ($descs{$_[0]}) {
4585 $rv{'desc'} = $descs{$_[0]};
4589 # Apply per-user description overridde
4590 my %gaccess = &get_module_acl(undef, "");
4591 if ($gaccess{'desc_'.$_[0]}) {
4592 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4596 if ($rv{'longdesc'}) {
4597 # All standard modules have an index.cgi
4598 $rv{'index_link'} = 'index.cgi';
4601 # Call theme-specific override function
4602 if (defined(&theme_get_module_info)) {
4603 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4609 =head2 get_all_module_infos(cachemode)
4611 Returns a list contains the information on all modules in this webmin
4612 install, including clones. Uses caching to reduce the number of module.info
4613 files that need to be read. Each element of the array is a hash reference
4614 in the same format as returned by get_module_info. The cache mode flag can be :
4615 0 = read and write, 1 = don't read or write, 2 = read only
4618 sub get_all_module_infos
4622 # Is the cache out of date? (ie. have any of the root's changed?)
4623 my $cache_file = "$config_directory/module.infos.cache";
4625 if (&read_file_cached($cache_file, \%cache)) {
4626 foreach my $r (@root_directories) {
4628 if ($st[9] != $cache{'mtime_'.$r}) {
4638 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4639 # Can use existing module.info cache
4641 foreach my $k (keys %cache) {
4642 if ($k =~ /^(\S+) (\S+)$/) {
4643 $mods{$1}->{$2} = $cache{$k};
4646 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4649 # Need to rebuild cache
4651 foreach my $r (@root_directories) {
4653 foreach my $m (readdir(DIR)) {
4654 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4655 my %minfo = &get_module_info($m, 0, 1);
4656 next if (!%minfo || !$minfo{'dir'});
4658 foreach $k (keys %minfo) {
4659 $cache{"${m} ${k}"} = $minfo{$k};
4664 $cache{'mtime_'.$r} = $st[9];
4666 $cache{'lang'} = $current_lang;
4667 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4670 # Override descriptions for modules for current user
4671 my %gaccess = &get_module_acl(undef, "");
4672 foreach my $m (@rv) {
4673 if ($gaccess{"desc_".$m->{'dir'}}) {
4674 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4678 # Apply installed flags
4680 &read_file_cached("$config_directory/installed.cache", \%installed);
4681 foreach my $m (@rv) {
4682 $m->{'installed'} = $installed{$m->{'dir'}};
4688 =head2 get_theme_info(theme)
4690 Returns a hash containing a theme's details, taken from it's theme.info file.
4691 Some useful keys are :
4693 =item dir - The theme directory, like blue-theme.
4695 =item desc - Human-readable description, in the current users' language.
4697 =item version - Optional module version number.
4699 =item os_support - List of supported operating systems and versions.
4704 return () if ($_[0] =~ /^\./);
4706 my $tdir = &module_root_directory($_[0]);
4707 &read_file("$tdir/theme.info", \%rv) || return ();
4708 foreach my $o (@lang_order_list) {
4709 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4715 =head2 list_languages
4717 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4718 Each is a hash reference with the following keys :
4720 =item lang - The short language code, like es for Spanish.
4722 =item desc - A human-readable description, in English.
4724 =item charset - An optional character set to use when displaying the language.
4726 =item titles - Set to 1 only if Webmin has title images for the language.
4728 =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.
4733 if (!@main::list_languages_cache) {
4736 open(LANG, "$root_directory/lang_list.txt");
4738 if (/^(\S+)\s+(.*)/) {
4739 my $l = { 'desc' => $2 };
4740 foreach $o (split(/,/, $1)) {
4741 if ($o =~ /^([^=]+)=(.*)$/) {
4745 $l->{'index'} = scalar(@rv);
4746 push(@main::list_languages_cache, $l);
4750 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4751 @main::list_languages_cache;
4753 return @main::list_languages_cache;
4756 =head2 read_env_file(file, &hash)
4758 Similar to Webmin's read_file function, but handles files containing shell
4759 environment variables formatted like :
4764 The file parameter is the full path to the file to read, and hash a Perl hash
4765 ref to read names and values into.
4771 &open_readfile(FILE, $_[0]) || return 0;
4774 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4775 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4776 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4784 =head2 write_env_file(file, &hash, [export])
4786 Writes out a hash to a file in name='value' format, suitable for use in a shell
4787 script. The parameters are :
4789 =item file - Full path for a file to write to
4791 =item hash - Hash reference of names and values to write.
4793 =item export - If set to 1, preceed each variable setting with the word 'export'.
4798 my $exp = $_[2] ? "export " : "";
4799 &open_tempfile(FILE, ">$_[0]");
4800 foreach my $k (keys %{$_[1]}) {
4801 my $v = $_[1]->{$k};
4802 if ($v =~ /^\S+$/) {
4803 &print_tempfile(FILE, "$exp$k=$v\n");
4806 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4809 &close_tempfile(FILE);
4812 =head2 lock_file(filename, [readonly], [forcefile])
4814 Lock a file for exclusive access. If the file is already locked, spin
4815 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4816 to work OK. The parameters are :
4818 =item filename - File or directory to lock.
4820 =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.
4822 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4827 my $realfile = &translate_filename($_[0]);
4828 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4829 my $no_lock = !&can_lock_file($realfile);
4830 my $lock_tries_count = 0;
4833 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4838 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4841 # Create the .lock file
4842 open(LOCKING, ">$realfile.lock") || return 0;
4843 my $lck = eval "flock(LOCKING, 2+4)";
4845 # Lock of lock file failed! Wait till later
4848 print LOCKING $$,"\n";
4849 eval "flock(LOCKING, 8)";
4852 $main::locked_file_list{$realfile} = int($_[1]);
4853 push(@main::temporary_files, "$realfile.lock");
4854 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4855 !&get_module_variable('$no_log_file_changes') &&
4857 # Grab a copy of this file for later diffing
4859 $main::locked_file_data{$realfile} = undef;
4861 $main::locked_file_type{$realfile} = 1;
4862 $main::locked_file_data{$realfile} = '';
4864 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4865 $main::locked_file_type{$realfile} = 2;
4866 $main::locked_file_data{$realfile} = $lnk;
4868 elsif (open(ORIGFILE, $realfile)) {
4869 $main::locked_file_type{$realfile} = 0;
4870 $main::locked_file_data{$realfile} = '';
4873 $main::locked_file_data{$realfile} .=$_;
4882 if ($lock_tries_count++ > 5*60) {
4883 # Give up after 5 minutes
4884 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4890 =head2 unlock_file(filename)
4892 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4893 file changes is enabled, then at unlock file a diff will be taken between the
4894 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4895 called. This can then be viewed in the Webmin Actions Log module.
4900 my $realfile = &translate_filename($_[0]);
4901 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4902 unlink("$realfile.lock") if (&can_lock_file($realfile));
4903 delete($main::locked_file_list{$realfile});
4904 if (exists($main::locked_file_data{$realfile})) {
4905 # Diff the new file with the old
4907 my $lnk = readlink($realfile);
4908 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4909 my $oldtype = $main::locked_file_type{$realfile};
4910 my $new = !defined($main::locked_file_data{$realfile});
4911 if ($new && !-e _) {
4912 # file doesn't exist, and never did! do nothing ..
4914 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4915 # is (or was) a directory ..
4916 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4917 push(@main::locked_file_diff,
4918 { 'type' => 'mkdir', 'object' => $realfile });
4920 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4921 push(@main::locked_file_diff,
4922 { 'type' => 'rmdir', 'object' => $realfile });
4925 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4926 # is (or was) a symlink ..
4927 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4928 push(@main::locked_file_diff,
4929 { 'type' => 'symlink', 'object' => $realfile,
4932 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4933 push(@main::locked_file_diff,
4934 { 'type' => 'unsymlink', 'object' => $realfile,
4935 'data' => $main::locked_file_data{$realfile} });
4937 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4938 push(@main::locked_file_diff,
4939 { 'type' => 'resymlink', 'object' => $realfile,
4944 # is a file, or has changed type?!
4945 my ($diff, $delete_file);
4946 my $type = "modify";
4948 open(NEWFILE, ">$realfile");
4953 if (!defined($main::locked_file_data{$realfile})) {
4956 open(ORIGFILE, ">$realfile.webminorig");
4957 print ORIGFILE $main::locked_file_data{$realfile};
4959 $diff = &backquote_command(
4960 "diff ".quotemeta("$realfile.webminorig")." ".
4961 quotemeta($realfile)." 2>/dev/null");
4962 push(@main::locked_file_diff,
4963 { 'type' => $type, 'object' => $realfile,
4964 'data' => $diff } ) if ($diff);
4965 unlink("$realfile.webminorig");
4966 unlink($realfile) if ($delete_file);
4969 if ($gconfig{'logfullfiles'}) {
4970 # Add file details to list of those to fully log
4971 $main::orig_file_data{$realfile} ||=
4972 $main::locked_file_data{$realfile};
4973 $main::orig_file_type{$realfile} ||=
4974 $main::locked_file_type{$realfile};
4977 delete($main::locked_file_data{$realfile});
4978 delete($main::locked_file_type{$realfile});
4982 =head2 test_lock(file)
4984 Returns 1 if some file is currently locked, 0 if not.
4989 my $realfile = &translate_filename($_[0]);
4990 return 0 if (!$_[0]);
4991 return 1 if (defined($main::locked_file_list{$realfile}));
4992 return 0 if (!&can_lock_file($realfile));
4994 if (open(LOCKING, "$realfile.lock")) {
4999 return $pid && kill(0, $pid);
5002 =head2 unlock_all_files
5004 Unlocks all files locked by the current script.
5007 sub unlock_all_files
5009 foreach $f (keys %main::locked_file_list) {
5014 =head2 can_lock_file(file)
5016 Returns 1 if some file should be locked, based on the settings in the
5017 Webmin Configuration module. For internal use by lock_file only.
5022 if (&is_readonly_mode()) {
5023 return 0; # never lock in read-only mode
5025 elsif ($gconfig{'lockmode'} == 0) {
5028 elsif ($gconfig{'lockmode'} == 1) {
5032 # Check if under any of the directories
5034 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
5035 if (&same_file($d, $_[0]) ||
5036 &is_under_directory($d, $_[0])) {
5040 return $gconfig{'lockmode'} == 2 ? $match : !$match;
5044 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
5046 Log some action taken by a user. This is typically called at the end of a
5047 script, once all file changes are complete and all commands run. The
5050 =item action - A short code for the action being performed, like 'create'.
5052 =item type - A code for the type of object the action is performed to, like 'user'.
5054 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
5056 =item params - A hash ref of additional information about the action.
5058 =item module - Name of the module in which the action was performed, which defaults to the current module.
5060 =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.
5062 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
5064 =item client-ip - IP address of the browser that performed the action.
5069 return if (!$gconfig{'log'} || &is_readonly_mode());
5070 my $m = $_[4] ? $_[4] : &get_module_name();
5072 if ($gconfig{'logclear'}) {
5073 # check if it is time to clear the log
5074 my @st = stat("$webmin_logfile.time");
5075 my $write_logtime = 0;
5077 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
5078 # clear logfile and all diff files
5079 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
5080 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
5081 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
5082 unlink($webmin_logfile);
5089 if ($write_logtime) {
5090 open(LOGTIME, ">$webmin_logfile.time");
5091 print LOGTIME time(),"\n";
5096 # If an action script directory is defined, call the appropriate scripts
5097 if ($gconfig{'action_script_dir'}) {
5098 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
5099 my ($basedir) = $gconfig{'action_script_dir'};
5101 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
5104 opendir(DIR, $dir) or die "Can't open $dir: $!";
5105 while (defined($file = readdir(DIR))) {
5106 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
5107 if (-x "$dir/$file") {
5108 # Call a script notifying it of the action
5110 $ENV{'ACTION_MODULE'} = &get_module_name();
5111 $ENV{'ACTION_ACTION'} = $_[0];
5112 $ENV{'ACTION_TYPE'} = $_[1];
5113 $ENV{'ACTION_OBJECT'} = $_[2];
5114 $ENV{'ACTION_SCRIPT'} = $script_name;
5115 foreach my $p (keys %param) {
5116 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5118 system("$dir/$file", @_,
5119 "<$null_file", ">$null_file", "2>&1");
5127 # should logging be done at all?
5128 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5129 split(/\s+/, $gconfig{'logusers'})) < 0);
5130 return if ($gconfig{'logmodules'} && &indexof($m,
5131 split(/\s+/, $gconfig{'logmodules'})) < 0);
5135 my @tm = localtime($now);
5136 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5137 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5138 $main::action_id_count++;
5139 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5140 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5141 $tm[2], $tm[1], $tm[0],
5142 $remote_user || '-',
5143 $main::session_id || '-',
5144 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5145 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5146 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5148 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5149 my $v = $_[3]->{$k};
5155 elsif (ref($v) eq 'ARRAY') {
5159 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5160 $line .= " $k='$vv'";
5164 foreach $vv (split(/\0/, $v)) {
5166 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5167 $line .= " $k='$vv'";
5170 $param{$k} = join(" ", @pv);
5172 open(WEBMINLOG, ">>$webmin_logfile");
5173 print WEBMINLOG $line,"\n";
5175 if ($gconfig{'logperms'}) {
5176 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5179 chmod(0600, $webmin_logfile);
5182 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5183 # Find and record the changes made to any locked files, or commands run
5185 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5186 foreach my $d (@main::locked_file_diff) {
5187 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
5188 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
5189 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5190 print DIFFLOG $d->{'data'};
5192 if ($d->{'input'}) {
5193 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5194 print DIFFLOG $d->{'input'};
5197 if ($gconfig{'logperms'}) {
5198 chmod(oct($gconfig{'logperms'}),
5199 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
5200 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5204 @main::locked_file_diff = undef;
5207 if ($gconfig{'logfullfiles'}) {
5208 # Save the original contents of any modified files
5210 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5211 foreach my $f (keys %main::orig_file_data) {
5212 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
5213 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
5214 if (!defined($main::orig_file_type{$f})) {
5215 print ORIGLOG -1," ",$f,"\n";
5218 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5220 print ORIGLOG $main::orig_file_data{$f};
5222 if ($gconfig{'logperms'}) {
5223 chmod(oct($gconfig{'logperms'}),
5224 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
5228 %main::orig_file_data = undef;
5229 %main::orig_file_type = undef;
5232 if ($miniserv::page_capture_out) {
5233 # Save the whole page output
5234 mkdir("$ENV{'WEBMIN_VAR'}/output", 0700);
5235 open(PAGEOUT, ">$ENV{'WEBMIN_VAR'}/output/$id");
5236 print PAGEOUT $miniserv::page_capture_out;
5238 if ($gconfig{'logperms'}) {
5239 chmod(oct($gconfig{'logperms'}),
5240 "$ENV{'WEBMIN_VAR'}/output/$id");
5242 $miniserv::page_capture_out = undef;
5246 if ($gconfig{'logsyslog'}) {
5247 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5248 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5249 setlogsock("inet");';
5251 # Syslog module is installed .. try to convert to a
5252 # human-readable form
5254 my $mod = &get_module_name();
5255 my $mdir = module_root_directory($mod);
5256 if (-r "$mdir/log_parser.pl") {
5257 &foreign_require($mod, "log_parser.pl");
5259 foreach my $k (keys %{$_[3]}) {
5260 my $v = $_[3]->{$k};
5261 if (ref($v) eq 'ARRAY') {
5262 $params{$k} = join("\0", @$v);
5268 $msg = &foreign_call($mod, "parse_webmin_log",
5269 $remote_user, $script_name,
5270 $_[0], $_[1], $_[2], \%params);
5271 $msg =~ s/<[^>]*>//g; # Remove tags
5273 elsif ($_[0] eq "_config_") {
5274 my %wtext = &load_language("webminlog");
5275 $msg = $wtext{'search_config'};
5277 $msg ||= "$_[0] $_[1] $_[2]";
5278 my %info = &get_module_info($m);
5279 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5284 =head2 additional_log(type, object, data, [input])
5286 Records additional log data for an upcoming call to webmin_log, such
5287 as a command that was run or SQL that was executed. Typically you will never
5288 need to call this function directory.
5293 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5294 push(@main::locked_file_diff,
5295 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5296 'input' => $_[3] } );
5300 =head2 webmin_debug_log(type, message)
5302 Write something to the Webmin debug log. For internal use only.
5305 sub webmin_debug_log
5307 my ($type, $msg) = @_;
5308 return 0 if (!$main::opened_debug_log);
5309 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5310 if ($gconfig{'debug_modules'}) {
5311 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5312 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5315 my @tm = localtime($now);
5317 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
5318 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5319 $tm[2], $tm[1], $tm[0],
5320 $remote_user || "-",
5321 $ENV{'REMOTE_HOST'} || "-",
5322 &get_module_name() || "-",
5325 seek(main::DEBUGLOG, 0, 2);
5326 print main::DEBUGLOG $line."\n";
5330 =head2 system_logged(command)
5332 Just calls the Perl system() function, but also logs the command run.
5337 if (&is_readonly_mode()) {
5338 print STDERR "Vetoing command $_[0]\n";
5341 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5342 my $cmd = join(" ", @realcmd);
5344 if ($cmd =~ s/(\s*&\s*)$//) {
5347 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5348 $cmd =~ s/^\((.*)\)\s*$/$1/;
5350 &additional_log('exec', undef, $cmd);
5351 return system(@realcmd);
5354 =head2 backquote_logged(command)
5356 Executes a command and returns the output (like `command`), but also logs it.
5359 sub backquote_logged
5361 if (&is_readonly_mode()) {
5363 print STDERR "Vetoing command $_[0]\n";
5366 my $realcmd = &translate_command($_[0]);
5369 if ($cmd =~ s/(\s*&\s*)$//) {
5372 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5373 $cmd =~ s/^\((.*)\)\s*$/$1/;
5375 &additional_log('exec', undef, $cmd);
5376 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5380 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5382 Runs some command, waiting at most the given number of seconds for it to
5383 complete, and returns the output. The maxlines parameter sets the number
5384 of lines of output to capture. The safe parameter should be set to 1 if the
5385 command is safe for read-only mode users to run.
5388 sub backquote_with_timeout
5390 my $realcmd = &translate_command($_[0]);
5391 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5392 if ($gconfig{'debug_what_cmd'});
5394 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5399 my $elapsed = time() - $start;
5400 last if ($elapsed > $_[1]);
5402 vec($rmask, fileno(OUT), 1) = 1;
5403 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5404 last if (!$sel || $sel < 0);
5406 last if (!defined($line));
5409 if ($_[3] && $linecount >= $_[3]) {
5414 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5418 return wantarray ? ($out, $timed_out) : $out;
5421 =head2 backquote_command(command, safe?)
5423 Executes a command and returns the output (like `command`), subject to
5424 command translation. The safe parameter should be set to 1 if the command
5425 is safe for read-only mode users to run.
5428 sub backquote_command
5430 if (&is_readonly_mode() && !$_[1]) {
5431 print STDERR "Vetoing command $_[0]\n";
5435 my $realcmd = &translate_command($_[0]);
5436 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5440 =head2 kill_logged(signal, pid, ...)
5442 Like Perl's built-in kill function, but also logs the fact that some process
5443 was killed. On Windows, falls back to calling process.exe to terminate a
5449 return scalar(@_)-1 if (&is_readonly_mode());
5450 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5451 if ($gconfig{'debug_what_procs'});
5452 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5453 if ($gconfig{'os_type'} eq 'windows') {
5454 # Emulate some kills with process.exe
5455 my $arg = $_[0] eq "KILL" ? "-k" :
5456 $_[0] eq "TERM" ? "-q" :
5457 $_[0] eq "STOP" ? "-s" :
5458 $_[0] eq "CONT" ? "-r" : undef;
5460 foreach my $p (@_[1..@_-1]) {
5462 $ok ||= kill($_[0], $p);
5465 &execute_command("process $arg $p");
5477 =head2 rename_logged(old, new)
5479 Re-names a file and logs the rename. If the old and new files are on different
5480 filesystems, calls mv or the Windows rename function to do the job.
5485 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5486 return &rename_file($_[0], $_[1]);
5489 =head2 rename_file(old, new)
5491 Renames a file or directory. If the old and new files are on different
5492 filesystems, calls mv or the Windows rename function to do the job.
5497 if (&is_readonly_mode()) {
5498 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5501 my $src = &translate_filename($_[0]);
5502 my $dst = &translate_filename($_[1]);
5503 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5504 if ($gconfig{'debug_what_ops'});
5505 my $ok = rename($src, $dst);
5506 if (!$ok && $! !~ /permission/i) {
5507 # Try the mv command, in case this is a cross-filesystem rename
5508 if ($gconfig{'os_type'} eq 'windows') {
5509 # Need to use rename
5510 my $out = &backquote_command("rename ".quotemeta($_[0]).
5511 " ".quotemeta($_[1])." 2>&1");
5513 $! = $out if (!$ok);
5517 my $out = &backquote_command("mv ".quotemeta($_[0]).
5518 " ".quotemeta($_[1])." 2>&1");
5520 $! = $out if (!$ok);
5526 =head2 symlink_logged(src, dest)
5528 Create a symlink, and logs it. Effectively does the same thing as the Perl
5535 my $rv = &symlink_file($_[0], $_[1]);
5536 &unlock_file($_[1]);
5540 =head2 symlink_file(src, dest)
5542 Creates a soft link, unless in read-only mode. Effectively does the same thing
5543 as the Perl symlink function.
5548 if (&is_readonly_mode()) {
5549 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5552 my $src = &translate_filename($_[0]);
5553 my $dst = &translate_filename($_[1]);
5554 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5555 if ($gconfig{'debug_what_ops'});
5556 return symlink($src, $dst);
5559 =head2 link_file(src, dest)
5561 Creates a hard link, unless in read-only mode. The existing new link file
5562 will be deleted if necessary. Effectively the same as Perl's link function.
5567 if (&is_readonly_mode()) {
5568 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5571 my $src = &translate_filename($_[0]);
5572 my $dst = &translate_filename($_[1]);
5573 &webmin_debug_log('LINK', "src=$src dst=$dst")
5574 if ($gconfig{'debug_what_ops'});
5575 unlink($dst); # make sure link works
5576 return link($src, $dst);
5579 =head2 make_dir(dir, perms, recursive)
5581 Creates a directory and sets permissions on it, unless in read-only mode.
5582 The perms parameter sets the octal permissions to apply, which unlike Perl's
5583 mkdir will really get set. The recursive flag can be set to 1 to have the
5584 function create parent directories too.
5589 my ($dir, $perms, $recur) = @_;
5590 if (&is_readonly_mode()) {
5591 print STDERR "Vetoing directory $dir\n";
5594 $dir = &translate_filename($dir);
5595 my $exists = -d $dir ? 1 : 0;
5596 return 1 if ($exists && $recur); # already exists
5597 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5598 my $rv = mkdir($dir, $perms);
5599 if (!$rv && $recur) {
5600 # Failed .. try mkdir -p
5601 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5602 my $ex = &execute_command("mkdir $param "."e_path($dir));
5608 chmod($perms, $dir);
5613 =head2 set_ownership_permissions(user, group, perms, file, ...)
5615 Sets the user, group owner and permissions on some files. The parameters are :
5617 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5619 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5621 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5623 =item file - One or more files or directories to modify.
5626 sub set_ownership_permissions
5628 my ($user, $group, $perms, @files) = @_;
5629 if (&is_readonly_mode()) {
5630 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5633 @files = map { &translate_filename($_) } @files;
5634 if ($gconfig{'debug_what_ops'}) {
5635 foreach my $f (@files) {
5636 &webmin_debug_log('PERMS',
5637 "file=$f user=$user group=$group perms=$perms");
5641 if (defined($user)) {
5642 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5644 if (defined($group)) {
5645 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5648 my @uinfo = getpwuid($uid);
5651 $rv = chown($uid, $gid, @files);
5653 if ($rv && defined($perms)) {
5654 $rv = chmod($perms, @files);
5659 =head2 unlink_logged(file, ...)
5661 Like Perl's unlink function, but locks the files beforehand and un-locks them
5662 after so that the deletion is logged by Webmin.
5668 foreach my $f (@_) {
5669 if (!&test_lock($f)) {
5674 my @rv = &unlink_file(@_);
5675 foreach my $f (@_) {
5680 return wantarray ? @rv : $rv[0];
5683 =head2 unlink_file(file, ...)
5685 Deletes some files or directories. Like Perl's unlink function, but also
5686 recursively deletes directories with the rm command if needed.
5691 return 1 if (&is_readonly_mode());
5694 foreach my $f (@_) {
5695 &unflush_file_lines($f);
5696 my $realf = &translate_filename($f);
5697 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5699 if (!rmdir($realf)) {
5701 if ($gconfig{'os_type'} eq 'windows') {
5702 # Call del and rmdir commands
5705 my $out = `del /q "$qm" 2>&1`;
5707 $out = `rmdir "$qm" 2>&1`;
5712 my $qm = quotemeta($realf);
5713 $out = `rm -rf $qm 2>&1`;
5722 if (!unlink($realf)) {
5728 return wantarray ? ($rv, $err) : $rv;
5731 =head2 copy_source_dest(source, dest)
5733 Copy some file or directory to a new location. Returns 1 on success, or 0
5734 on failure - also sets $! on failure. If the source is a directory, uses
5735 piped tar commands to copy a whole directory structure including permissions
5739 sub copy_source_dest
5741 return (1, undef) if (&is_readonly_mode());
5742 my ($src, $dst) = @_;
5745 &webmin_debug_log('COPY', "src=$src dst=$dst")
5746 if ($gconfig{'debug_what_ops'});
5747 if ($gconfig{'os_type'} eq 'windows') {
5748 # No tar or cp on windows, so need to use copy command
5752 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5755 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5763 # A directory .. need to copy with tar command
5764 my @st = stat($src);
5767 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5768 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5775 # Can just copy with cp
5776 my $out = &backquote_logged("cp -p ".quotemeta($src).
5777 " ".quotemeta($dst)." 2>&1");
5783 return wantarray ? ($ok, $err) : $ok;
5786 =head2 remote_session_name(host|&server)
5788 Generates a session ID for some server. For this server, this will always
5789 be an empty string. For a server object it will include the hostname and
5790 port and PID. For a server name, it will include the hostname and PID. For
5794 sub remote_session_name
5796 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5797 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5798 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5799 ref($_[0]) ? "" : "$_[0].$$";
5802 =head2 remote_foreign_require(server, module, file)
5804 Connects to rpc.cgi on a remote webmin server and have it open a session
5805 to a process that will actually do the require and run functions. This is the
5806 equivalent for foreign_require, but for a remote Webmin system. The server
5807 parameter can either be a hostname of a system registered in the Webmin
5808 Servers Index module, or a hash reference for a system from that module.
5811 sub remote_foreign_require
5813 my $call = { 'action' => 'require',
5816 my $sn = &remote_session_name($_[0]);
5817 if ($remote_session{$sn}) {
5818 $call->{'session'} = $remote_session{$sn};
5821 $call->{'newsession'} = 1;
5823 my $rv = &remote_rpc_call($_[0], $call);
5824 if ($rv->{'session'}) {
5825 $remote_session{$sn} = $rv->{'session'};
5826 $remote_session_server{$sn} = $_[0];
5830 =head2 remote_foreign_call(server, module, function, [arg]*)
5832 Call a function on a remote server. Must have been setup first with
5833 remote_foreign_require for the same server and module. Equivalent to
5834 foreign_call, but with the extra server parameter to specify the remote
5838 sub remote_foreign_call
5840 return undef if (&is_readonly_mode());
5841 my $sn = &remote_session_name($_[0]);
5842 return &remote_rpc_call($_[0], { 'action' => 'call',
5845 'session' => $remote_session{$sn},
5846 'args' => [ @_[3 .. $#_] ] } );
5849 =head2 remote_foreign_check(server, module, [api-only])
5851 Checks if some module is installed and supported on a remote server. Equivilant
5852 to foreign_check, but for the remote Webmin system specified by the server
5856 sub remote_foreign_check
5858 return &remote_rpc_call($_[0], { 'action' => 'check',
5863 =head2 remote_foreign_config(server, module)
5865 Gets the configuration for some module from a remote server, as a hash.
5866 Equivalent to foreign_config, but for a remote system.
5869 sub remote_foreign_config
5871 return &remote_rpc_call($_[0], { 'action' => 'config',
5872 'module' => $_[1] });
5875 =head2 remote_eval(server, module, code)
5877 Evaluates some perl code in the context of a module on a remote webmin server.
5878 The server parameter must be the hostname of a remote system, module must
5879 be a module directory name, and code a string of Perl code to run. This can
5880 only be called after remote_foreign_require for the same server and module.
5885 return undef if (&is_readonly_mode());
5886 my $sn = &remote_session_name($_[0]);
5887 return &remote_rpc_call($_[0], { 'action' => 'eval',
5890 'session' => $remote_session{$sn} });
5893 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5895 Transfers some local file to another server via Webmin's RPC protocol, and
5896 returns the resulting remote filename. If the remotefile parameter is given,
5897 that is the destination filename which will be used. Otherwise a randomly
5898 selected temporary filename will be used, and returned by the function.
5903 return undef if (&is_readonly_mode());
5905 my $sn = &remote_session_name($_[0]);
5906 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5907 # Copy data over TCP connection
5908 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5910 'name' => $_[3] } );
5912 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5913 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5914 return &$main::remote_error_handler("Failed to transfer file : $error")
5917 while(read(FILE, $got, 1024) > 0) {
5921 shutdown(TWRITE, 1);
5923 if ($error && $error !~ /^OK/) {
5924 # Got back an error!
5925 return &$main::remote_error_handler("Failed to transfer file : $error");
5931 # Just pass file contents as parameters
5933 while(read(FILE, $got, 1024) > 0) {
5937 return &remote_rpc_call($_[0], { 'action' => 'write',
5940 'session' => $remote_session{$sn} });
5944 =head2 remote_read(server, localfile, remotefile)
5946 Transfers a file from a remote server to this system, using Webmin's RPC
5947 protocol. The server parameter must be the hostname of a system registered
5948 in the Webmin Servers Index module, localfile is the destination path on this
5949 system, and remotefile is the file to fetch from the remote server.
5954 my $sn = &remote_session_name($_[0]);
5955 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5956 # Copy data over TCP connection
5957 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5958 'file' => $_[2] } );
5960 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5963 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5964 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5965 return &$main::remote_error_handler("Failed to transfer file : $error")
5968 open(FILE, ">$_[1]");
5969 while(read(TREAD, $got, 1024) > 0) {
5976 # Just get data as return value
5977 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5979 'session' => $remote_session{$sn} });
5980 open(FILE, ">$_[1]");
5986 =head2 remote_finished
5988 Close all remote sessions. This happens automatically after a while
5989 anyway, but this function should be called to clean things up faster.
5994 foreach my $sn (keys %remote_session) {
5995 my $server = $remote_session_server{$sn};
5996 &remote_rpc_call($server, { 'action' => 'quit',
5997 'session' => $remote_session{$sn} } );
5998 delete($remote_session{$sn});
5999 delete($remote_session_server{$sn});
6001 foreach my $fh (keys %fast_fh_cache) {
6003 delete($fast_fh_cache{$fh});
6007 =head2 remote_error_setup(&function)
6009 Sets a function to be called instead of &error when a remote RPC operation
6010 fails. Useful if you want to have more control over your remote operations.
6013 sub remote_error_setup
6015 $main::remote_error_handler = $_[0] || \&error;
6018 =head2 remote_rpc_call(server, &structure)
6020 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
6021 and then reads back a reply structure. This is mainly for internal use only,
6022 and is called by the other remote_* functions.
6028 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
6030 # Server structure was given
6032 $serv->{'user'} || $serv->{'id'} == 0 ||
6033 return &$main::remote_error_handler(
6034 "No Webmin login set for server");
6037 # lookup the server in the webmin servers module if needed
6038 if (!%main::remote_servers_cache) {
6039 &foreign_require("servers", "servers-lib.pl");
6040 foreach $s (&foreign_call("servers", "list_servers")) {
6041 $main::remote_servers_cache{$s->{'host'}} = $s;
6042 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
6045 $serv = $main::remote_servers_cache{$_[0]};
6046 $serv || return &$main::remote_error_handler(
6047 "No Webmin Servers entry for $_[0]");
6048 $serv->{'user'} || return &$main::remote_error_handler(
6049 "No login set for server $_[0]");
6051 my $ip = $serv->{'ip'} || $serv->{'host'};
6053 # Work out the username and password
6055 if ($serv->{'sameuser'}) {
6056 $user = $remote_user;
6057 defined($main::remote_pass) || return &$main::remote_error_handler(
6058 "Password for this server is not available");
6059 $pass = $main::remote_pass;
6062 $user = $serv->{'user'};
6063 $pass = $serv->{'pass'};
6066 if ($serv->{'fast'} || !$sn) {
6067 # Make TCP connection call to fastrpc.cgi
6068 if (!$fast_fh_cache{$sn} && $sn) {
6069 # Need to open the connection
6070 my $con = &make_http_connection(
6071 $ip, $serv->{'port'}, $serv->{'ssl'},
6072 "POST", "/fastrpc.cgi");
6073 return &$main::remote_error_handler(
6074 "Failed to connect to $serv->{'host'} : $con")
6076 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6077 &write_http_connection($con, "User-agent: Webmin\r\n");
6078 my $auth = &encode_base64("$user:$pass");
6080 &write_http_connection($con, "Authorization: basic $auth\r\n");
6081 &write_http_connection($con, "Content-length: ",
6082 length($tostr),"\r\n");
6083 &write_http_connection($con, "\r\n");
6084 &write_http_connection($con, $tostr);
6086 # read back the response
6087 my $line = &read_http_connection($con);
6088 $line =~ tr/\r\n//d;
6089 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6090 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6092 $line =~ /^HTTP\/1\..\s+200\s+/ ||
6093 return &$main::remote_error_handler("HTTP error : $line");
6095 $line = &read_http_connection($con);
6096 $line =~ tr/\r\n//d;
6098 $line = &read_http_connection($con);
6099 if ($line =~ /^0\s+(.*)/) {
6100 return &$main::remote_error_handler("RPC error : $1");
6102 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
6103 $line =~ /^1\s+(\S+)\s+(\S+)/) {
6104 # Started ok .. connect and save SID
6105 &close_http_connection($con);
6106 my ($port, $sid, $version, $error) = ($1, $2, $3);
6107 &open_socket($ip, $port, $sid, \$error);
6108 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
6110 $fast_fh_cache{$sn} = $sid;
6111 $remote_server_version{$sn} = $version;
6114 while($stuff = &read_http_connection($con)) {
6117 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
6120 elsif (!$fast_fh_cache{$sn}) {
6121 # Open the connection by running fastrpc.cgi locally
6122 pipe(RPCOUTr, RPCOUTw);
6126 open(STDOUT, ">&RPCOUTw");
6130 $ENV{'REQUEST_METHOD'} = 'GET';
6131 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6132 $ENV{'SERVER_ROOT'} ||= $root_directory;
6134 if ($base_remote_user ne 'root' &&
6135 $base_remote_user ne 'admin') {
6136 # Need to fake up a login for the CGI!
6137 &read_acl(undef, \%acl, [ 'root' ]);
6138 $ENV{'BASE_REMOTE_USER'} =
6139 $ENV{'REMOTE_USER'} =
6140 $acl{'root'} ? 'root' : 'admin';
6142 delete($ENV{'FOREIGN_MODULE_NAME'});
6143 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6144 chdir($root_directory);
6145 if (!exec("$root_directory/fastrpc.cgi")) {
6146 print "exec failed : $!\n";
6153 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6157 if ($line =~ /^0\s+(.*)/) {
6158 return &$main::remote_error_handler("RPC error : $2");
6160 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6161 # Started ok .. connect and save SID
6163 my ($port, $sid, $error) = ($1, $2, undef);
6164 &open_socket("localhost", $port, $sid, \$error);
6165 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6166 $fast_fh_cache{$sn} = $sid;
6173 &error("Bad response from fastrpc.cgi : $line");
6176 # Got a connection .. send off the request
6177 my $fh = $fast_fh_cache{$sn};
6178 my $tostr = &serialise_variable($_[1]);
6179 print $fh length($tostr)," $fh\n";
6181 my $rlen = int(<$fh>);
6182 my ($fromstr, $got);
6183 while(length($fromstr) < $rlen) {
6184 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
6185 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6188 my $from = &unserialise_variable($fromstr);
6190 return &$main::remote_error_handler("Remote Webmin error");
6192 if (defined($from->{'arv'})) {
6193 return @{$from->{'arv'}};
6196 return $from->{'rv'};
6200 # Call rpc.cgi on remote server
6201 my $tostr = &serialise_variable($_[1]);
6203 my $con = &make_http_connection($ip, $serv->{'port'},
6204 $serv->{'ssl'}, "POST", "/rpc.cgi");
6205 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6207 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6208 &write_http_connection($con, "User-agent: Webmin\r\n");
6209 my $auth = &encode_base64("$user:$pass");
6211 &write_http_connection($con, "Authorization: basic $auth\r\n");
6212 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6213 &write_http_connection($con, "\r\n");
6214 &write_http_connection($con, $tostr);
6216 # read back the response
6217 my $line = &read_http_connection($con);
6218 $line =~ tr/\r\n//d;
6219 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6220 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6222 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6224 $line = &read_http_connection($con);
6225 $line =~ tr/\r\n//d;
6228 while($line = &read_http_connection($con)) {
6232 my $from = &unserialise_variable($fromstr);
6233 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6234 if (defined($from->{'arv'})) {
6235 return @{$from->{'arv'}};
6238 return $from->{'rv'};
6243 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6245 Executes some function in parallel on multiple servers at once. Fills in
6246 the returns and errors arrays respectively. If the module and library
6247 parameters are given, that module is remotely required on the server first,
6248 to check if it is connectable. The parameters are :
6250 =item servers - A list of Webmin system hash references.
6252 =item parallel - Number of parallel operations to perform.
6254 =item function - Reference to function to call for each system.
6256 =item args - Additional parameters to the function.
6258 =item returns - Array ref to place return values into, in same order as servers.
6260 =item errors - Array ref to place error messages into.
6262 =item module - Optional module to require on the remote system first.
6264 =item library - Optional library to require in the module.
6267 sub remote_multi_callback
6269 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6270 &remote_error_setup(\&remote_multi_callback_error);
6272 # Call the functions
6274 foreach my $g (@$servs) {
6280 $remote_multi_callback_err = undef;
6282 # Require the remote lib
6283 &remote_foreign_require($g->{'host'}, $mod, $lib);
6284 if ($remote_multi_callback_err) {
6285 # Failed .. return error
6286 print $wh &serialise_variable(
6287 [ undef, $remote_multi_callback_err ]);
6293 my $a = ref($args) ? $args->[$p] : $args;
6294 my $rv = &$func($g, $a);
6297 print $wh &serialise_variable(
6298 [ $rv, $remote_multi_callback_err ]);
6306 # Read back the results
6308 foreach my $g (@$servs) {
6312 $errs->[$p] = "Failed to read response from $g->{'host'}";
6315 my $rv = &unserialise_variable($line);
6317 $rets->[$p] = $rv->[0];
6318 $errs->[$p] = $rv->[1];
6323 &remote_error_setup(undef);
6326 sub remote_multi_callback_error
6328 $remote_multi_callback_err = $_[0];
6331 =head2 serialise_variable(variable)
6333 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6334 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6335 called on each member to serialize the entire object.
6338 sub serialise_variable
6340 if (!defined($_[0])) {
6346 $rv = &urlize($_[0]);
6348 elsif ($r eq 'SCALAR') {
6349 $rv = &urlize(${$_[0]});
6351 elsif ($r eq 'ARRAY') {
6352 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6354 elsif ($r eq 'HASH') {
6355 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6356 &urlize(&serialise_variable($_[0]->{$_})) }
6359 elsif ($r eq 'REF') {
6360 $rv = &serialise_variable(${$_[0]});
6362 elsif ($r eq 'CODE') {
6367 # An object - treat as a hash
6368 $r = "OBJECT ".&urlize($r);
6369 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6370 &urlize(&serialise_variable($_[0]->{$_})) }
6373 return ($r ? $r : 'VAL').",".$rv;
6376 =head2 unserialise_variable(string)
6378 Converts a string created by serialise_variable() back into the original
6379 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6380 object, the same class is used on this system, if available.
6383 sub unserialise_variable
6385 my @v = split(/,/, $_[0]);
6387 if ($v[0] eq 'VAL') {
6388 @v = split(/,/, $_[0], -1);
6389 $rv = &un_urlize($v[1]);
6391 elsif ($v[0] eq 'SCALAR') {
6392 local $r = &un_urlize($v[1]);
6395 elsif ($v[0] eq 'ARRAY') {
6397 for(my $i=1; $i<@v; $i++) {
6398 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6401 elsif ($v[0] eq 'HASH') {
6403 for(my $i=1; $i<@v; $i+=2) {
6404 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6405 &unserialise_variable(&un_urlize($v[$i+1]));
6408 elsif ($v[0] eq 'REF') {
6409 local $r = &unserialise_variable($v[1]);
6412 elsif ($v[0] eq 'UNDEF') {
6415 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6416 # An object hash that we have to re-bless
6419 for(my $i=1; $i<@v; $i+=2) {
6420 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6421 &unserialise_variable(&un_urlize($v[$i+1]));
6429 =head2 other_groups(user)
6431 Returns a list of secondary groups a user is a member of, as a list of
6440 while(my @g = getgrent()) {
6441 my @m = split(/\s+/, $g[3]);
6442 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6444 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6448 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6450 Returns HTML for a button that pops up a data chooser window. The parameters
6453 =item dayfield - Name of the text field to place the day of the month into.
6455 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6457 =item yearfield - Name of the text field to place the year into.
6460 sub date_chooser_button
6462 return &theme_date_chooser_button(@_)
6463 if (defined(&theme_date_chooser_button));
6464 my ($w, $h) = (250, 225);
6465 if ($gconfig{'db_sizedate'}) {
6466 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6468 return "<input type=button onClick='window.dfield = form.$_[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";
6471 =head2 help_file(module, file)
6473 Returns the path to a module's help file of some name, typically under the
6474 help directory with a .html extension.
6479 my $mdir = &module_root_directory($_[0]);
6480 my $dir = "$mdir/help";
6481 foreach my $o (@lang_order_list) {
6482 my $lang = "$dir/$_[1].$o.html";
6483 return $lang if (-r $lang);
6485 return "$dir/$_[1].html";
6490 Seeds the random number generator, if not already done in this script. On Linux
6491 this makes use of the current time, process ID and a read from /dev/urandom.
6492 On other systems, only the current time and process ID are used.
6497 if (!$main::done_seed_random) {
6498 if (open(RANDOM, "/dev/urandom")) {
6500 read(RANDOM, $buf, 4);
6502 srand(time() ^ $$ ^ $buf);
6507 $main::done_seed_random = 1;
6511 =head2 disk_usage_kb(directory)
6513 Returns the number of kB used by some directory and all subdirs. Implemented
6514 by calling the C<du -k> command.
6519 my $dir = &translate_filename($_[0]);
6521 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6523 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6525 return $out =~ /^([0-9]+)/ ? $1 : "???";
6528 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6530 Returns the number of bytes taken up by all files in some directory and all
6531 sub-directories, by summing up their lengths. The disk_usage_kb is more
6532 reflective of reality, as the filesystem typically pads file sizes to 1k or
6536 sub recursive_disk_usage
6538 my $dir = &translate_filename($_[0]);
6545 my @st = stat($dir);
6551 my @files = readdir(DIR);
6553 foreach my $f (@files) {
6554 next if ($f eq "." || $f eq "..");
6555 next if ($skip && $f =~ /$skip/);
6556 next if ($only && $f !~ /$only/);
6557 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6563 =head2 help_search_link(term, [ section, ... ] )
6565 Returns HTML for a link to the man module for searching local and online
6566 docs for various search terms. The term parameter can either be a single
6567 word like 'bind', or a space-separated list of words. This function is typically
6568 used by modules that want to refer users to additional documentation in man
6569 pages or local system doc files.
6572 sub help_search_link
6574 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6575 my $for = &urlize(shift(@_));
6576 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6577 join("&", map { "section=$_" } @_)."&".
6578 "for=$for&exact=1&check=".&get_module_name()."'>".
6579 $text{'helpsearch'}."</a>\n";
6586 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6588 Opens a connection to some HTTP server, maybe through a proxy, and returns
6589 a handle object. The handle can then be used to send additional headers
6590 and read back a response. If anything goes wrong, returns an error string.
6591 The parameters are :
6593 =item host - Hostname or IP address of the webserver to connect to.
6595 =item port - HTTP port number to connect to.
6597 =item ssl - Set to 1 to connect in SSL mode.
6599 =item method - HTTP method, like GET or POST.
6601 =item page - Page to request on the webserver, like /foo/index.html
6603 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6606 sub make_http_connection
6608 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6611 foreach my $h (@$headers) {
6612 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6616 if (&is_readonly_mode()) {
6617 return "HTTP connections not allowed in readonly mode";
6619 my $rv = { 'fh' => time().$$ };
6622 eval "use Net::SSLeay";
6623 $@ && return $text{'link_essl'};
6624 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6625 eval "Net::SSLeay::load_error_strings()";
6626 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6627 return "Failed to create SSL context";
6628 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6629 return "Failed to create SSL connection";
6631 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6632 !&no_proxy($host)) {
6635 &open_socket($1, $2, $rv->{'fh'}, \$error);
6638 my $fh = $rv->{'fh'};
6639 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6640 if ($gconfig{'proxy_user'}) {
6641 my $auth = &encode_base64(
6642 "$gconfig{'proxy_user'}:".
6643 "$gconfig{'proxy_pass'}");
6644 $auth =~ tr/\r\n//d;
6645 print $fh "Proxy-Authorization: Basic $auth\r\n";
6649 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6650 return "Proxy error : $3" if ($2 != 200);
6653 return "Proxy error : $line";
6658 elsif (!$gconfig{'proxy_fallback'}) {
6659 # Connection to proxy failed - give up
6666 &open_socket($host, $port, $rv->{'fh'}, \$error);
6667 return $error if ($error);
6669 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6670 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6671 return "SSL connect() failed";
6672 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6673 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6676 # Plain HTTP request
6678 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6679 !&no_proxy($host)) {
6682 &open_socket($1, $2, $rv->{'fh'}, \$error);
6686 my $fh = $rv->{'fh'};
6687 my $rtxt = $method." ".
6688 "http://$host:$port$page HTTP/1.0\r\n";
6689 if ($gconfig{'proxy_user'}) {
6690 my $auth = &encode_base64(
6691 "$gconfig{'proxy_user'}:".
6692 "$gconfig{'proxy_pass'}");
6693 $auth =~ tr/\r\n//d;
6694 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6699 elsif (!$gconfig{'proxy_fallback'}) {
6704 # Connecting directly
6706 &open_socket($host, $port, $rv->{'fh'}, \$error);
6707 return $error if ($error);
6708 my $fh = $rv->{'fh'};
6709 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6716 =head2 read_http_connection(&handle, [bytes])
6718 Reads either one line or up to the specified number of bytes from the handle,
6719 originally supplied by make_http_connection.
6722 sub read_http_connection
6726 if ($h->{'ssl_con'}) {
6729 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6730 # need to read more..
6731 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6733 $rv = $h->{'buffer'};
6734 delete($h->{'buffer'});
6737 $h->{'buffer'} .= $more;
6739 $rv = substr($h->{'buffer'}, 0, $idx+1);
6740 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6743 if (length($h->{'buffer'})) {
6744 $rv = $h->{'buffer'};
6745 delete($h->{'buffer'});
6748 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6754 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6757 my $fh = $h->{'fh'};
6761 $rv = undef if ($rv eq "");
6765 =head2 write_http_connection(&handle, [data+])
6767 Writes the given data to the given HTTP connection handle.
6770 sub write_http_connection
6773 my $fh = $h->{'fh'};
6775 if ($h->{'ssl_ctx'}) {
6776 foreach my $s (@_) {
6777 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6778 $allok = 0 if (!$ok);
6782 my $ok = (print $fh @_);
6783 $allok = 0 if (!$ok);
6788 =head2 close_http_connection(&handle)
6790 Closes a connection to an HTTP server, identified by the given handle.
6793 sub close_http_connection
6799 =head2 clean_environment
6801 Deletes any environment variables inherited from miniserv so that they
6802 won't be passed to programs started by webmin. This is useful when calling
6803 programs that check for CGI-related environment variables and modify their
6804 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6807 sub clean_environment
6809 %UNCLEAN_ENV = %ENV;
6810 foreach my $k (keys %ENV) {
6811 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6815 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6816 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6817 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6818 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6819 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6820 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6821 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6822 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6828 =head2 reset_environment
6830 Puts the environment back how it was before clean_environment was callled.
6833 sub reset_environment
6836 foreach my $k (keys %UNCLEAN_ENV) {
6837 $ENV{$k} = $UNCLEAN_ENV{$k};
6839 undef(%UNCLEAN_ENV);
6843 =head2 progress_callback
6845 Never called directly, but useful for passing to &http_download to print
6846 out progress of an HTTP request.
6849 sub progress_callback
6851 if (defined(&theme_progress_callback)) {
6852 # Call the theme override
6853 return &theme_progress_callback(@_);
6857 print $progress_callback_prefix;
6859 $progress_size = $_[1];
6860 $progress_step = int($_[1] / 10);
6861 print &text('progress_size2', $progress_callback_url,
6862 &nice_size($progress_size)),"<br>\n";
6865 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6867 $last_progress_time = $last_progress_size = undef;
6869 elsif ($_[0] == 3) {
6871 my $sp = $progress_callback_prefix.(" " x 5);
6872 if ($progress_size) {
6873 # And we have a size to compare against
6874 my $st = int(($_[1] * 10) / $progress_size);
6875 my $time_now = time();
6876 if ($st != $progress_step ||
6877 $time_now - $last_progress_time > 60) {
6878 # Show progress every 10% or 60 seconds
6879 print $sp,&text('progress_datan', &nice_size($_[1]),
6880 int($_[1]*100/$progress_size)),"<br>\n";
6881 $last_progress_time = $time_now;
6883 $progress_step = $st;
6886 # No total size .. so only show in 100k jumps
6887 if ($_[1] > $last_progress_size+100*1024) {
6888 print $sp,&text('progress_data2n',
6889 &nice_size($_[1])),"<br>\n";
6890 $last_progress_size = $_[1];
6894 elsif ($_[0] == 4) {
6895 # All done downloading
6896 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6898 elsif ($_[0] == 5) {
6899 # Got new location after redirect
6900 $progress_callback_url = $_[1];
6902 elsif ($_[0] == 6) {
6904 $progress_callback_url = $_[1];
6905 print &text('progress_incache', $progress_callback_url),"<br>\n";
6909 =head2 switch_to_remote_user
6911 Changes the user and group of the current process to that of the unix user
6912 with the same name as the current webmin login, or fails if there is none.
6913 This should be called by Usermin module scripts that only need to run with
6914 limited permissions.
6917 sub switch_to_remote_user
6919 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6921 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6922 &create_missing_homedir(\@remote_user_info);
6924 &switch_to_unix_user(\@remote_user_info);
6925 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6926 $ENV{'HOME'} = $remote_user_info[7];
6928 # Export global variables to caller
6929 if ($main::export_to_caller) {
6930 my ($callpkg) = caller();
6931 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6935 =head2 switch_to_unix_user(&user-details)
6937 Switches the current process to the UID and group ID from the given list
6938 of user details, which must be in the format returned by getpwnam.
6941 sub switch_to_unix_user
6944 if (!defined($uinfo->[0])) {
6945 # No username given, so just use given GID
6946 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6949 # Use all groups from user
6950 ($(, $)) = ( $uinfo->[3],
6951 "$uinfo->[3] ".join(" ", $uinfo->[3],
6952 &other_groups($uinfo->[0])) );
6955 POSIX::setuid($uinfo->[2]);
6957 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6958 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6962 =head2 eval_as_unix_user(username, &code)
6964 Runs some code fragment with the effective UID and GID switch to that
6965 of the given Unix user, so that file IO takes place with his permissions.
6969 sub eval_as_unix_user
6971 my ($user, $code) = @_;
6972 my @uinfo = getpwnam($user);
6973 if (!scalar(@uinfo)) {
6974 &error("eval_as_unix_user called with invalid user $user");
6976 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6980 local $main::error_must_die = 1;
6987 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6990 return wantarray ? @rv : $rv[0];
6993 =head2 create_user_config_dirs
6995 Creates per-user config directories and sets $user_config_directory and
6996 $user_module_config_directory to them. Also reads per-user module configs
6997 into %userconfig. This should be called by Usermin module scripts that need
6998 to store per-user preferences or other settings.
7001 sub create_user_config_dirs
7003 return if (!$gconfig{'userconfig'});
7004 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
7005 return if (!@uinfo || !$uinfo[7]);
7006 &create_missing_homedir(\@uinfo);
7007 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
7008 if (!-d $user_config_directory) {
7009 mkdir($user_config_directory, 0700) ||
7010 &error("Failed to create $user_config_directory : $!");
7011 if ($< == 0 && $uinfo[2]) {
7012 chown($uinfo[2], $uinfo[3], $user_config_directory);
7015 if (&get_module_name()) {
7016 $user_module_config_directory = $user_config_directory."/".
7018 if (!-d $user_module_config_directory) {
7019 mkdir($user_module_config_directory, 0700) ||
7020 &error("Failed to create $user_module_config_directory : $!");
7021 if ($< == 0 && $uinfo[2]) {
7022 chown($uinfo[2], $uinfo[3], $user_config_directory);
7026 &read_file_cached("$module_root_directory/defaultuconfig",
7028 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
7029 &read_file_cached("$user_module_config_directory/config",
7033 # Export global variables to caller
7034 if ($main::export_to_caller) {
7035 my ($callpkg) = caller();
7036 foreach my $v ('$user_config_directory',
7037 '$user_module_config_directory', '%userconfig') {
7038 my ($vt, $vn) = split('', $v, 2);
7039 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
7044 =head2 create_missing_homedir(&uinfo)
7046 If auto homedir creation is enabled, create one for this user if needed.
7047 For internal use only.
7050 sub create_missing_homedir
7053 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
7054 # Use has no home dir .. make one
7055 system("mkdir -p ".quotemeta($uinfo->[7]));
7056 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
7057 if ($gconfig{'create_homedir_perms'} ne '') {
7058 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
7063 =head2 filter_javascript(text)
7065 Disables all javascript <script>, onClick= and so on tags in the given HTML,
7066 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
7069 sub filter_javascript
7072 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
7073 $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;
7074 $rv =~ s/(javascript:)/x$1/gi;
7075 $rv =~ s/(vbscript:)/x$1/gi;
7079 =head2 resolve_links(path)
7081 Given a path that may contain symbolic links, returns the real path.
7087 $path =~ s/\/+/\//g;
7088 $path =~ s/\/$// if ($path ne "/");
7089 my @p = split(/\/+/, $path);
7091 for(my $i=0; $i<@p; $i++) {
7092 my $sofar = "/".join("/", @p[0..$i]);
7093 my $lnk = readlink($sofar);
7094 if ($lnk eq $sofar) {
7095 # Link to itself! Cannot do anything more really ..
7098 elsif ($lnk =~ /^\//) {
7099 # Link is absolute..
7100 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
7104 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
7110 =head2 simplify_path(path, bogus)
7112 Given a path, maybe containing elements ".." and "." , convert it to a
7113 clean, absolute form. Returns undef if this is not possible.
7121 my @bits = split(/\/+/, $dir);
7124 foreach my $b (@bits) {
7128 elsif ($b eq "..") {
7130 if (scalar(@fixedbits) == 0) {
7131 # Cannot! Already at root!
7138 push(@fixedbits, $b);
7141 return "/".join('/', @fixedbits);
7144 =head2 same_file(file1, file2)
7146 Returns 1 if two files are actually the same
7151 return 1 if ($_[0] eq $_[1]);
7152 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7153 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7154 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7155 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7156 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7157 return 0 if (!@stat1 || !@stat2);
7158 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7161 =head2 flush_webmin_caches
7163 Clears all in-memory and on-disk caches used by Webmin.
7166 sub flush_webmin_caches
7168 undef(%main::read_file_cache);
7169 undef(%main::acl_hash_cache);
7170 undef(%main::acl_array_cache);
7171 undef(%main::has_command_cache);
7172 undef(@main::list_languages_cache);
7173 undef($main::got_list_usermods_cache);
7174 undef(@main::list_usermods_cache);
7175 undef(%main::foreign_installed_cache);
7176 unlink("$config_directory/module.infos.cache");
7177 &get_all_module_infos();
7180 =head2 list_usermods
7182 Returns a list of additional module restrictions. For internal use in
7188 if (!$main::got_list_usermods_cache) {
7189 @main::list_usermods_cache = ( );
7191 open(USERMODS, "$config_directory/usermin.mods");
7193 if (/^([^:]+):(\+|-|):(.*)/) {
7194 push(@main::list_usermods_cache,
7195 [ $1, $2, [ split(/\s+/, $3) ] ]);
7199 $main::got_list_usermods_cache = 1;
7201 return @main::list_usermods_cache;
7204 =head2 available_usermods(&allmods, &usermods)
7206 Returns a list of modules that are available to the given user, based
7207 on usermod additional/subtractions. For internal use by Usermin only.
7210 sub available_usermods
7212 return @{$_[0]} if (!@{$_[1]});
7214 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7215 my @uinfo = @remote_user_info;
7216 @uinfo = getpwnam($remote_user) if (!@uinfo);
7217 foreach my $u (@{$_[1]}) {
7219 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7222 elsif ($u->[0] =~ /^\@(.*)$/) {
7223 # Check for group membership
7224 my @ginfo = getgrnam($1);
7225 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7226 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7228 elsif ($u->[0] =~ /^\//) {
7229 # Check users and groups in file
7231 open(USERFILE, $u->[0]);
7234 if ($_ eq $remote_user) {
7237 elsif (/^\@(.*)$/) {
7238 my @ginfo = getgrnam($1);
7240 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7241 &indexof($remote_user,
7242 split(/\s+/, $ginfo[3])) >= 0));
7249 if ($u->[1] eq "+") {
7250 map { $mods{$_}++ } @{$u->[2]};
7252 elsif ($u->[1] eq "-") {
7253 map { delete($mods{$_}) } @{$u->[2]};
7257 map { $mods{$_}++ } @{$u->[2]};
7261 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7264 =head2 get_available_module_infos(nocache)
7266 Returns a list of modules available to the current user, based on
7267 operating system support, access control and usermod restrictions. Useful
7268 in themes that need to display a list of modules the user can use.
7269 Each element of the returned array is a hash reference in the same format as
7270 returned by get_module_info.
7273 sub get_available_module_infos
7276 &read_acl(\%acl, \%uacl, [ $base_remote_user ]);
7277 my $risk = $gconfig{'risk_'.$base_remote_user};
7279 foreach my $minfo (&get_all_module_infos($_[0])) {
7280 next if (!&check_os_support($minfo));
7282 # Check module risk level
7283 next if ($risk ne 'high' && $minfo->{'risk'} &&
7284 $minfo->{'risk'} !~ /$risk/);
7288 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7289 !$acl{$base_remote_user,"*"});
7291 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7295 # Check usermod restrictions
7296 my @usermods = &list_usermods();
7297 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7298 &available_usermods(\@rv, \@usermods);
7300 # Check RBAC restrictions
7302 foreach my $m (@rv) {
7303 if (&supports_rbac($m->{'dir'}) &&
7304 &use_rbac_module_acl(undef, $m->{'dir'})) {
7305 local $rbacs = &get_rbac_module_acl($remote_user,
7313 # Module or system doesn't support RBAC
7314 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7320 if (defined(&theme_foreign_available)) {
7321 foreach my $m (@rbacrv) {
7322 if (&theme_foreign_available($m->{'dir'})) {
7331 # Check licence module vetos
7333 if ($main::licence_module) {
7334 foreach my $m (@themerv) {
7335 if (&foreign_call($main::licence_module,
7336 "check_module_licence", $m->{'dir'})) {
7348 =head2 get_visible_module_infos(nocache)
7350 Like get_available_module_infos, but excludes hidden modules from the list.
7351 Each element of the returned array is a hash reference in the same format as
7352 returned by get_module_info.
7355 sub get_visible_module_infos
7358 my $pn = &get_product_name();
7359 return grep { !$_->{'hidden'} &&
7360 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7363 =head2 get_visible_modules_categories(nocache)
7365 Returns a list of Webmin module categories, each of which is a hash ref
7366 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7367 of modules in the category, in the format returned by get_module_info.
7368 Un-used modules are automatically assigned to the 'unused' category, and
7369 those with no category are put into 'others'.
7372 sub get_visible_modules_categories
7375 my @mods = &get_visible_module_infos($nocache);
7377 if (&get_product_name() eq 'webmin') {
7378 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7379 @mods = grep { $_->{'installed'} ne '0' } @mods;
7381 my %cats = &list_categories(\@mods);
7383 foreach my $c (keys %cats) {
7384 my $cat = { 'code' => $c || 'other',
7385 'desc' => $cats{$c} };
7386 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7389 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7390 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7392 # Add un-installed modules in magic category
7393 my $cat = { 'code' => 'unused',
7394 'desc' => $text{'main_unused'},
7396 'modules' => \@unmods };
7402 =head2 is_under_directory(directory, file)
7404 Returns 1 if the given file is under the specified directory, 0 if not.
7405 Symlinks are taken into account in the file to find it's 'real' location.
7408 sub is_under_directory
7410 my ($dir, $file) = @_;
7411 return 1 if ($dir eq "/");
7412 return 0 if ($file =~ /\.\./);
7413 my $ld = &resolve_links($dir);
7415 return &is_under_directory($ld, $file);
7417 my $lp = &resolve_links($file);
7419 return &is_under_directory($dir, $lp);
7421 return 0 if (length($file) < length($dir));
7422 return 1 if ($dir eq $file);
7424 return substr($file, 0, length($dir)) eq $dir;
7427 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7429 Given an absolute URL, returns the host, port, page and ssl flag components.
7430 Relative URLs can also be parsed, if the base information is provided.
7435 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7437 my $ssl = $1 eq 'https';
7438 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
7444 elsif ($_[0] =~ /^\/\S*$/) {
7445 # A relative to the server URL
7446 return ($_[1], $_[2], $_[0], $_[4]);
7449 # A relative to the directory URL
7451 $page =~ s/[^\/]+$//;
7452 return ($_[1], $_[2], $page.$_[0], $_[4]);
7456 =head2 check_clicks_function
7458 Returns HTML for a JavaScript function called check_clicks that returns
7459 true when first called, but false subsequently. Useful on onClick for
7460 critical buttons. Deprecated, as this method of preventing duplicate actions
7464 sub check_clicks_function
7469 function check_clicks(form)
7476 for(i=0; i<form.length; i++)
7477 form.elements[i].disabled = true;
7486 =head2 load_entities_map
7488 Returns a hash ref containing mappings between HTML entities (like ouml) and
7489 ascii values (like 246). Mainly for internal use.
7492 sub load_entities_map
7494 if (!%entities_map_cache) {
7496 open(EMAP, "$root_directory/entities_map.txt");
7498 if (/^(\d+)\s+(\S+)/) {
7499 $entities_map_cache{$2} = $1;
7504 return \%entities_map_cache;
7507 =head2 entities_to_ascii(string)
7509 Given a string containing HTML entities like ö and 7, replace them
7510 with their ASCII equivalents.
7513 sub entities_to_ascii
7516 my $emap = &load_entities_map();
7517 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7518 $str =~ s/&#(\d+);/chr($1)/ge;
7522 =head2 get_product_name
7524 Returns either 'webmin' or 'usermin', depending on which program the current
7525 module is in. Useful for modules that can be installed into either.
7528 sub get_product_name
7530 return $gconfig{'product'} if (defined($gconfig{'product'}));
7531 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7536 Returns the character set for the current language, such as iso-8859-1.
7541 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7542 $current_lang_info->{'charset'} ?
7543 $current_lang_info->{'charset'} : $default_charset;
7547 =head2 get_display_hostname
7549 Returns the system's hostname for UI display purposes. This may be different
7550 from the actual hostname if you administrator has configured it so in the
7551 Webmin Configuration module.
7554 sub get_display_hostname
7556 if ($gconfig{'hostnamemode'} == 0) {
7557 return &get_system_hostname();
7559 elsif ($gconfig{'hostnamemode'} == 3) {
7560 return $gconfig{'hostnamedisplay'};
7563 my $h = $ENV{'HTTP_HOST'};
7565 if ($gconfig{'hostnamemode'} == 2) {
7566 $h =~ s/^(www|ftp|mail)\.//i;
7572 =head2 save_module_config([&config], [modulename])
7574 Saves the configuration for some module. The config parameter is an optional
7575 hash reference of names and values to save, which defaults to the global
7576 %config hash. The modulename parameter is the module to update the config
7577 file, which defaults to the current module.
7580 sub save_module_config
7582 my $c = $_[0] || { &get_module_variable('%config') };
7583 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7584 &write_file("$config_directory/$m/config", $c);
7587 =head2 save_user_module_config([&config], [modulename])
7589 Saves the user's Usermin preferences for some module. The config parameter is
7590 an optional hash reference of names and values to save, which defaults to the
7591 global %userconfig hash. The modulename parameter is the module to update the
7592 config file, which defaults to the current module.
7595 sub save_user_module_config
7597 my $c = $_[0] || { &get_module_variable('%userconfig') };
7598 my $m = $_[1] || &get_module_name();
7599 my $ucd = $user_config_directory;
7601 my @uinfo = @remote_user_info ? @remote_user_info
7602 : getpwnam($remote_user);
7603 return if (!@uinfo || !$uinfo[7]);
7604 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7606 &write_file("$ucd/$m/config", $c);
7609 =head2 nice_size(bytes, [min])
7611 Converts a number of bytes into a number followed by a suffix like GB, MB
7612 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7613 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7618 my ($units, $uname);
7619 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7620 $units = 1024*1024*1024*1024;
7623 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7624 $units = 1024*1024*1024;
7627 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7631 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7639 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7641 return $sz." ".$uname;
7644 =head2 get_perl_path
7646 Returns the path to Perl currently in use, such as /usr/bin/perl.
7651 if (open(PERL, "$config_directory/perl-path")) {
7657 return $^X if (-x $^X);
7658 return &has_command("perl");
7661 =head2 get_goto_module([&mods])
7663 Returns the details of a module that the current user should be re-directed
7664 to after logging in, or undef if none. Useful for themes.
7669 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7670 if ($gconfig{'gotomodule'}) {
7671 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7672 return $goto if ($goto);
7674 if (@mods == 1 && $gconfig{'gotoone'}) {
7680 =head2 select_all_link(field, form, [text])
7682 Returns HTML for a 'Select all' link that uses Javascript to select
7683 multiple checkboxes with the same name. The parameters are :
7685 =item field - Name of the checkbox inputs.
7687 =item form - Index of the form on the page.
7689 =item text - Message for the link, defaulting to 'Select all'.
7694 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7695 my ($field, $form, $text) = @_;
7697 $text ||= $text{'ui_selall'};
7698 return "<a class='select_all' href='#' onClick='var ff = document.forms[$form].$field; ff.checked = true; for(i=0; i<ff.length; i++) { if (!ff[i].disabled) { ff[i].checked = true; } } return false'>$text</a>";
7701 =head2 select_invert_link(field, form, text)
7703 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7704 selection on multiple checkboxes with the same name. The parameters are :
7706 =item field - Name of the checkbox inputs.
7708 =item form - Index of the form on the page.
7710 =item text - Message for the link, defaulting to 'Invert selection'.
7713 sub select_invert_link
7715 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7716 my ($field, $form, $text) = @_;
7718 $text ||= $text{'ui_selinv'};
7719 return "<a class='select_invert' href='#' onClick='var ff = document.forms[$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>";
7722 =head2 select_rows_link(field, form, text, &rows)
7724 Returns HTML for a link that uses Javascript to select rows with particular
7725 values for their checkboxes. The parameters are :
7727 =item field - Name of the checkbox inputs.
7729 =item form - Index of the form on the page.
7731 =item text - Message for the link, de
7733 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7736 sub select_rows_link
7738 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7739 my ($field, $form, $text, $rows) = @_;
7741 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7742 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7743 $js .= "return false;";
7744 return "<a href='#' onClick='$js'>$text</a>";
7747 =head2 check_pid_file(file)
7749 Given a pid file, returns the PID it contains if the process is running.
7754 open(PIDFILE, $_[0]) || return undef;
7755 my $pid = <PIDFILE>;
7757 $pid =~ /^\s*(\d+)/ || return undef;
7758 kill(0, $1) || return undef;
7764 Return the local os-specific library name to this module. For internal use only.
7769 my $mn = &get_module_name();
7770 my $md = &module_root_directory($mn);
7771 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7772 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7774 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7775 return "$mn-$gconfig{'os_type'}-lib.pl";
7777 elsif (-r "$md/$mn-generic-lib.pl") {
7778 return "$mn-generic-lib.pl";
7785 =head2 module_root_directory(module)
7787 Given a module name, returns its root directory. On a typical Webmin install,
7788 all modules are under the same directory - but it is theoretically possible to
7792 sub module_root_directory
7794 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7795 if (@root_directories > 1) {
7796 foreach my $r (@root_directories) {
7802 return "$root_directories[0]/$d";
7805 =head2 list_mime_types
7807 Returns a list of all known MIME types and their extensions, as a list of hash
7808 references with keys :
7810 =item type - The MIME type, like text/plain.
7812 =item exts - A list of extensions, like .doc and .avi.
7814 =item desc - A human-readable description for the MIME type.
7819 if (!@list_mime_types_cache) {
7821 open(MIME, "$root_directory/mime.types");
7825 if (s/#\s*(.*)$//g) {
7828 my ($type, @exts) = split(/\s+/);
7830 push(@list_mime_types_cache, { 'type' => $type,
7837 return @list_mime_types_cache;
7840 =head2 guess_mime_type(filename, [default])
7842 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7843 The optional default parameter sets a default type of use if none is found,
7844 which defaults to application/octet-stream.
7849 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7851 foreach my $t (&list_mime_types()) {
7852 foreach my $e (@{$t->{'exts'}}) {
7853 return $t->{'type'} if (lc($e) eq lc($ext));
7857 return @_ > 1 ? $_[1] : "application/octet-stream";
7860 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7862 Opens a file handle for writing to a temporary file, which will only be
7863 renamed over the real file when the handle is closed. This allows critical
7864 files like /etc/shadow to be updated safely, even if writing fails part way
7865 through due to lack of disk space. The parameters are :
7867 =item handle - File handle to open, as you would use in Perl's open function.
7869 =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.
7871 =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 $! with the error code.
7873 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7875 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7881 # Just getting a temp file
7882 if (!defined($main::open_tempfiles{$_[0]})) {
7883 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7884 my $dir = $1 || "/";
7885 my $tmp = "$dir/$2.webmintmp.$$";
7886 $main::open_tempfiles{$_[0]} = $tmp;
7887 push(@main::temporary_files, $tmp);
7889 return $main::open_tempfiles{$_[0]};
7893 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7894 $fh = &callers_package($fh);
7896 my %gaccess = &get_module_acl(undef, "");
7897 my $db = $gconfig{'debug_what_write'};
7898 if ($file =~ /\r|\n|\0/) {
7899 if ($noerror) { return 0; }
7900 else { &error("Filename contains invalid characters"); }
7902 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7903 # Read-only mode .. veto all writes
7904 print STDERR "vetoing write to $file\n";
7905 return open($fh, ">$null_file");
7907 elsif ($file =~ /^(>|>>|)nul$/i) {
7908 # Write to Windows null device
7909 &webmin_debug_log($1 eq ">" ? "WRITE" :
7910 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7912 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7913 # Writes to /dev/null or TTYs don't need to be handled
7914 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7915 return open($fh, $file);
7917 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7918 &webmin_debug_log("WRITE", $1) if ($db);
7919 # Over-writing a file, via a temp file
7921 $file = &translate_filename($file);
7923 # Open the link target instead
7924 $file = &resolve_links($file);
7927 # Cannot open a directory!
7928 if ($noerror) { return 0; }
7929 else { &error("Cannot write to directory $file"); }
7931 my $tmp = &open_tempfile($file);
7932 my $ex = open($fh, ">$tmp");
7933 if (!$ex && $! =~ /permission/i) {
7934 # Could not open temp file .. try opening actual file
7936 $ex = open($fh, ">$file");
7937 delete($main::open_tempfiles{$file});
7940 $main::open_temphandles{$fh} = $file;
7943 if (!$ex && !$noerror) {
7944 &error(&text("efileopen", $file, $!));
7948 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7949 # Just writing direct to a file
7950 &webmin_debug_log("WRITE", $1) if ($db);
7952 $file = &translate_filename($file);
7953 my @old_attributes = &get_clear_file_attributes($file);
7954 my $ex = open($fh, ">$file");
7955 &reset_file_attributes($file, \@old_attributes);
7956 $main::open_temphandles{$fh} = $file;
7957 if (!$ex && !$noerror) {
7958 &error(&text("efileopen", $file, $!));
7963 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7964 # Appending to a file .. nothing special to do
7965 &webmin_debug_log("APPEND", $1) if ($db);
7967 $file = &translate_filename($file);
7968 my @old_attributes = &get_clear_file_attributes($file);
7969 my $ex = open($fh, ">>$file");
7970 &reset_file_attributes($file, \@old_attributes);
7971 $main::open_temphandles{$fh} = $file;
7972 if (!$ex && !$noerror) {
7973 &error(&text("efileopen", $file, $!));
7978 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7979 # Read mode .. nothing to do here
7980 &webmin_debug_log("READ", $file) if ($db);
7981 $file = &translate_filename($file);
7982 return open($fh, $file);
7984 elsif ($file eq ">" || $file eq ">>") {
7985 my ($package, $filename, $line) = caller;
7986 if ($noerror) { return 0; }
7987 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7990 my ($package, $filename, $line) = caller;
7991 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7996 =head2 close_tempfile(file|handle)
7998 Copies a temp file to the actual file, assuming that all writes were
7999 successful. The handle must have been one passed to open_tempfile.
8005 my $fh = &callers_package($_[0]);
8007 if (defined($file = $main::open_temphandles{$fh})) {
8009 close($fh) || &error(&text("efileclose", $file, $!));
8010 delete($main::open_temphandles{$fh});
8011 return &close_tempfile($file);
8013 elsif (defined($main::open_tempfiles{$_[0]})) {
8015 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
8016 my @st = stat($_[0]);
8017 if (&is_selinux_enabled() && &has_command("chcon")) {
8018 # Set original security context
8019 system("chcon --reference=".quotemeta($_[0]).
8020 " ".quotemeta($main::open_tempfiles{$_[0]}).
8021 " >/dev/null 2>&1");
8023 my @old_attributes = &get_clear_file_attributes($_[0]);
8024 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
8026 # Set original permissions and ownership
8027 chmod($st[2], $_[0]);
8028 chown($st[4], $st[5], $_[0]);
8030 &reset_file_attributes($_[0], \@old_attributes);
8031 delete($main::open_tempfiles{$_[0]});
8032 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
8033 if ($main::open_templocks{$_[0]}) {
8034 &unlock_file($_[0]);
8035 delete($main::open_templocks{$_[0]});
8040 # Must be closing a handle not associated with a file
8046 =head2 print_tempfile(handle, text, ...)
8048 Like the normal print function, but calls &error on failure. Useful when
8049 combined with open_tempfile, to ensure that a criticial file is never
8050 only partially written.
8055 my ($fh, @args) = @_;
8056 $fh = &callers_package($fh);
8057 (print $fh @args) || &error(&text("efilewrite",
8058 $main::open_temphandles{$fh} || $fh, $!));
8061 =head2 is_selinux_enabled
8063 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
8066 sub is_selinux_enabled
8068 if (!defined($main::selinux_enabled_cache)) {
8070 if ($gconfig{'os_type'} !~ /-linux$/) {
8071 # Not on linux, so no way
8072 $main::selinux_enabled_cache = 0;
8074 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
8075 # Use global config file
8076 $main::selinux_enabled_cache =
8077 $seconfig{'SELINUX'} eq 'disabled' ||
8078 !$seconfig{'SELINUX'} ? 0 : 1;
8081 # Use selinuxenabled command
8082 #$selinux_enabled_cache =
8083 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
8084 $main::selinux_enabled_cache = 0;
8087 return $main::selinux_enabled_cache;
8090 =head2 get_clear_file_attributes(file)
8092 Finds file attributes that may prevent writing, clears them and returns them
8093 as a list. May call error. Mainly for internal use by open_tempfile and
8097 sub get_clear_file_attributes
8101 if ($gconfig{'chattr'}) {
8102 # Get original immutable bit
8103 my $out = &backquote_command(
8104 "lsattr ".quotemeta($file)." 2>/dev/null");
8106 $out =~ s/\s\S+\n//;
8107 @old_attributes = grep { $_ ne '-' } split(//, $out);
8109 if (&indexof("i", @old_attributes) >= 0) {
8110 my $err = &backquote_logged(
8111 "chattr -i ".quotemeta($file)." 2>&1");
8113 &error("Failed to remove immutable bit on ".
8118 return @old_attributes;
8121 =head2 reset_file_attributes(file, &attributes)
8123 Put back cleared attributes on some file. May call error. Mainly for internal
8124 use by close_tempfile.
8127 sub reset_file_attributes
8129 my ($file, $old_attributes) = @_;
8130 if (&indexof("i", @$old_attributes) >= 0) {
8131 my $err = &backquote_logged(
8132 "chattr +i ".quotemeta($file)." 2>&1");
8134 &error("Failed to restore immutable bit on ".
8140 =head2 cleanup_tempnames
8142 Remove all temporary files generated using transname. Typically only called
8143 internally when a Webmin script exits.
8146 sub cleanup_tempnames
8148 foreach my $t (@main::temporary_files) {
8151 @main::temporary_files = ( );
8154 =head2 open_lock_tempfile([handle], file, [no-error])
8156 Returns a temporary file for writing to some actual file, and also locks it.
8157 Effectively the same as calling lock_file and open_tempfile on the same file,
8158 but calls the unlock for you automatically when it is closed.
8161 sub open_lock_tempfile
8163 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8164 $fh = &callers_package($fh);
8165 my $lockfile = $file;
8166 $lockfile =~ s/^[^\/]*//;
8167 if ($lockfile =~ /^\//) {
8168 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8170 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8175 $main::end_exit_status ||= $?;
8176 if ($$ == $main::initial_process_id) {
8177 # Exiting from initial process
8178 &cleanup_tempnames();
8179 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8180 $main::debug_log_start_module eq &get_module_name()) {
8181 my $len = time() - $main::debug_log_start_time;
8182 &webmin_debug_log("STOP", "runtime=$len");
8183 $main::debug_log_start_time = 0;
8185 if (!$ENV{'SCRIPT_NAME'} &&
8186 $main::initial_module_name eq &get_module_name()) {
8187 # In a command-line script - call the real exit, so that the
8188 # exit status gets properly propogated. In some cases this
8189 # was not happening.
8190 exit($main::end_exit_status);
8195 =head2 month_to_number(month)
8197 Converts a month name like feb to a number like 1.
8202 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8205 =head2 number_to_month(number)
8207 Converts a number like 1 to a month name like Feb.
8212 return ucfirst($number_to_month_map{$_[0]});
8215 =head2 get_rbac_module_acl(user, module)
8217 Returns a hash reference of RBAC overrides ACLs for some user and module.
8218 May return undef if none exist (indicating access denied), or the string *
8219 if full access is granted.
8222 sub get_rbac_module_acl
8224 my ($user, $mod) = @_;
8225 eval "use Authen::SolarisRBAC";
8226 return undef if ($@);
8229 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8230 # Automagic webmin.modulename.admin authorization exists .. allow access
8232 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8233 %rv = ( 'noconfig' => 1 );
8240 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8244 my ($auths, $acls) = split(/\s+/, $_);
8245 my @auths = split(/,/, $auths);
8247 my ($merge) = ($acls =~ s/^\+//);
8249 if ($auths eq "*") {
8250 # These ACLs apply to all RBAC users.
8251 # Only if there is some that match a specific authorization
8252 # later will they be used though.
8255 # Check each of the RBAC authorizations
8256 foreach my $a (@auths) {
8257 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8262 $foundany++ if ($gotall);
8265 # Found an RBAC authorization - return the ACLs
8266 return "*" if ($acls eq "*");
8267 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8269 # Just add to current set
8270 foreach my $a (keys %acl) {
8281 return !$foundany ? undef : %rv ? \%rv : undef;
8284 =head2 supports_rbac([module])
8286 Returns 1 if RBAC client support is available, such as on Solaris.
8291 return 0 if ($gconfig{'os_type'} ne 'solaris');
8292 eval "use Authen::SolarisRBAC";
8295 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8300 =head2 supports_ipv6()
8302 Returns 1 if outgoing IPv6 connections can be made
8307 return $ipv6_module_error ? 0 : 1;
8310 =head2 use_rbac_module_acl(user, module)
8312 Returns 1 if some user should use RBAC to get permissions for a module
8315 sub use_rbac_module_acl
8317 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8318 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8319 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8320 my %access = &get_module_acl($u, $m, 1);
8321 return $access{'rbac'} ? 1 : 0;
8324 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8326 Runs some command, possibly feeding it input and capturing output to the
8327 give files or scalar references. The parameters are :
8329 =item command - Full command to run, possibly including shell meta-characters.
8331 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8333 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8335 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8337 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8339 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8344 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8345 if (&is_readonly_mode() && !$safe) {
8346 print STDERR "Vetoing command $_[0]\n";
8350 $cmd = &translate_command($cmd);
8352 # Use ` operator where possible
8353 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8354 if (!$stdin && ref($stdout) && !$stderr) {
8355 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8356 $$stdout = `$cmd 2>$null_file`;
8359 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8360 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8361 $$stdout = `$cmd 2>&1`;
8364 elsif (!$stdin && !$stdout && !$stderr) {
8365 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8366 return system("$cmd >$null_file 2>$null_file <$null_file");
8370 $| = 1; # needed on some systems to flush before forking
8371 pipe(EXECSTDINr, EXECSTDINw);
8372 pipe(EXECSTDOUTr, EXECSTDOUTw);
8373 pipe(EXECSTDERRr, EXECSTDERRw);
8375 if (!($pid = fork())) {
8379 open(STDIN, "<&EXECSTDINr");
8380 open(STDOUT, ">&EXECSTDOUTw");
8381 if (ref($stderr) && $stderr eq $stdout) {
8382 open(STDERR, ">&EXECSTDOUTw");
8385 open(STDERR, ">&EXECSTDERRw");
8392 my $fullcmd = "($cmd)";
8393 if ($stdin && !ref($stdin)) {
8394 $fullcmd .= " <$stdin";
8396 if ($stdout && !ref($stdout)) {
8397 $fullcmd .= " >$stdout";
8399 if ($stderr && !ref($stderr)) {
8400 if ($stderr eq $stdout) {
8401 $fullcmd .= " 2>&1";
8404 $fullcmd .= " 2>$stderr";
8407 if ($gconfig{'os_type'} eq 'windows') {
8411 exec("/bin/sh", "-c", $fullcmd);
8413 print "Exec failed : $!\n";
8420 # Feed input and capture output
8422 if ($stdin && ref($stdin)) {
8423 print EXECSTDINw $$stdin;
8426 if ($stdout && ref($stdout)) {
8428 while(<EXECSTDOUTr>) {
8433 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8435 while(<EXECSTDERRr>) {
8446 =head2 open_readfile(handle, file)
8448 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8449 exactly the same as Perl's open function.
8454 my ($fh, $file) = @_;
8455 $fh = &callers_package($fh);
8456 my $realfile = &translate_filename($file);
8457 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8458 return open($fh, "<".$realfile);
8461 =head2 open_execute_command(handle, command, output?, safe?)
8463 Runs some command, with the specified file handle set to either write to it if
8464 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8465 indicates if the command modifies the state of the system or not.
8468 sub open_execute_command
8470 my ($fh, $cmd, $mode, $safe) = @_;
8471 $fh = &callers_package($fh);
8472 my $realcmd = &translate_command($cmd);
8473 if (&is_readonly_mode() && !$safe) {
8474 # Don't actually run it
8475 print STDERR "vetoing command $cmd\n";
8478 return open($fh, ">$null_file");
8481 return open($fh, $null_file);
8485 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8486 if ($gconfig{'debug_what_cmd'});
8488 return open($fh, "| $cmd");
8490 elsif ($mode == 1) {
8491 return open($fh, "$cmd 2>$null_file |");
8493 elsif ($mode == 2) {
8494 return open($fh, "$cmd 2>&1 |");
8498 =head2 translate_filename(filename)
8500 Applies all relevant registered translation functions to a filename. Mostly
8501 for internal use, and typically does nothing.
8504 sub translate_filename
8506 my ($realfile) = @_;
8507 my @funcs = grep { $_->[0] eq &get_module_name() ||
8508 !defined($_->[0]) } @main::filename_callbacks;
8509 foreach my $f (@funcs) {
8511 $realfile = &$func($realfile, @{$f->[2]});
8516 =head2 translate_command(filename)
8518 Applies all relevant registered translation functions to a command. Mostly
8519 for internal use, and typically does nothing.
8522 sub translate_command
8525 my @funcs = grep { $_->[0] eq &get_module_name() ||
8526 !defined($_->[0]) } @main::command_callbacks;
8527 foreach my $f (@funcs) {
8529 $realcmd = &$func($realcmd, @{$f->[2]});
8534 =head2 register_filename_callback(module|undef, &function, &args)
8536 Registers some function to be called when the specified module (or all
8537 modules) tries to open a file for reading and writing. The function must
8538 return the actual file to open. This allows you to override which files
8539 other code actually operates on, via the translate_filename function.
8542 sub register_filename_callback
8544 my ($mod, $func, $args) = @_;
8545 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8548 =head2 register_command_callback(module|undef, &function, &args)
8550 Registers some function to be called when the specified module (or all
8551 modules) tries to execute a command. The function must return the actual
8552 command to run. This allows you to override which commands other other code
8553 actually runs, via the translate_command function.
8556 sub register_command_callback
8558 my ($mod, $func, $args) = @_;
8559 push(@main::command_callbacks, [ $mod, $func, $args ]);
8562 =head2 capture_function_output(&function, arg, ...)
8564 Captures output that some function prints to STDOUT, and returns it. Useful
8565 for functions outside your control that print data when you really want to
8566 manipulate it before output.
8569 sub capture_function_output
8571 my ($func, @args) = @_;
8572 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8573 my $old = select(SOCKET1);
8574 my @rv = &$func(@args);
8583 return wantarray ? ($out, \@rv) : $out;
8586 =head2 capture_function_output_tempfile(&function, arg, ...)
8588 Behaves the same as capture_function_output, but uses a temporary file
8589 to avoid buffer full problems.
8592 sub capture_function_output_tempfile
8594 my ($func, @args) = @_;
8595 my $temp = &transname();
8596 open(BUFFER, ">$temp");
8597 my $old = select(BUFFER);
8598 my @rv = &$func(@args);
8601 my $out = &read_file_contents($temp);
8602 &unlink_file($temp);
8603 return wantarray ? ($out, \@rv) : $out;
8606 =head2 modules_chooser_button(field, multiple, [form])
8608 Returns HTML for a button for selecting one or many Webmin modules.
8609 field - Name of the HTML field to place the module names into.
8610 multiple - Set to 1 if multiple modules can be selected.
8611 form - Index of the form on the page.
8614 sub modules_chooser_button
8616 return &theme_modules_chooser_button(@_)
8617 if (defined(&theme_modules_chooser_button));
8618 my $form = defined($_[2]) ? $_[2] : 0;
8619 my $w = $_[1] ? 700 : 500;
8621 if ($_[1] && $gconfig{'db_sizemodules'}) {
8622 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8624 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8625 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8627 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";
8630 =head2 substitute_template(text, &hash)
8632 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8633 the text replaces it with the value of the hash key foo. Also supports blocks
8634 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8635 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8638 sub substitute_template
8640 # Add some extra fixed parameters to the hash
8641 my %hash = %{$_[1]};
8642 $hash{'hostname'} = &get_system_hostname();
8643 $hash{'webmin_config'} = $config_directory;
8644 $hash{'webmin_etc'} = $config_directory;
8645 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8646 $hash{'webmin_var'} = $var_directory;
8648 # Add time-based parameters, for use in DNS
8649 $hash{'current_time'} = time();
8650 my @tm = localtime($hash{'current_time'});
8651 $hash{'current_year'} = $tm[5]+1900;
8652 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8653 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8654 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8655 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8656 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8658 # Actually do the substition
8660 foreach my $s (keys %hash) {
8661 next if ($s eq ''); # Prevent just $ from being subbed
8664 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8665 $rv =~ s/\$\Q$us\E/$sv/g;
8667 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8668 # and ${IF}..${ENDIF} with value
8669 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8670 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8672 # Replace $IF..$ELSE..$ENDIF block with first value,
8673 # and $IF..$ENDIF with value
8674 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8675 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8677 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8678 # matching, nothing if not
8679 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8680 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8682 # Replace $IFEQ..$ENDIFEQ block with first value if
8683 # matching, nothing if not
8684 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8685 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8688 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8689 # and ${IF}..${ENDIF} with nothing
8690 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8691 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8693 # Replace $IF..$ELSE..$ENDIF block with second value,
8694 # and $IF..$ENDIF with nothing
8695 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8696 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8698 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8699 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8700 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8704 # Now assume any $IF blocks whose variables are not present in the hash
8705 # evaluate to false.
8706 # $IF...$ELSE x $ENDIF => x
8707 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8708 # $IF...x...$ENDIF => (nothing)
8709 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8710 # ${var} => (nothing)
8711 $rv =~ s/\$\{[A-Z]+\}//g;
8716 =head2 running_in_zone
8718 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8719 disable module and features that are not appropriate, like those that modify
8720 mounted filesystems.
8725 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8726 $gconfig{'os_version'} < 10);
8727 my $zn = `zonename 2>$null_file`;
8729 return $zn && $zn ne "global";
8732 =head2 running_in_vserver
8734 Returns 1 if the current Webmin instance is running in a Linux VServer.
8735 Used to disable modules and features that are not appropriate.
8738 sub running_in_vserver
8740 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8743 open(MTAB, "/etc/mtab");
8745 my ($dev, $mp) = split(/\s+/, $_);
8746 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8755 =head2 running_in_xen
8757 Returns 1 if Webmin is running inside a Xen instance, by looking
8758 at /proc/xen/capabilities.
8763 return 0 if (!-r "/proc/xen/capabilities");
8764 my $cap = &read_file_contents("/proc/xen/capabilities");
8765 return $cap =~ /control_d/ ? 0 : 1;
8768 =head2 running_in_openvz
8770 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8771 at /proc/vz/veinfo for a non-zero line.
8774 sub running_in_openvz
8776 return 0 if (!-r "/proc/vz/veinfo");
8777 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8778 return 0 if (!$lref || !@$lref);
8779 foreach my $l (@$lref) {
8781 my @ll = split(/\s+/, $l);
8782 return 0 if ($ll[0] eq '0');
8787 =head2 list_categories(&modules, [include-empty])
8789 Returns a hash mapping category codes to names, including any custom-defined
8790 categories. The modules parameter must be an array ref of module hash objects,
8791 as returned by get_all_module_infos.
8796 my ($mods, $empty) = @_;
8797 my (%cats, %catnames);
8798 &read_file("$config_directory/webmin.catnames", \%catnames);
8799 foreach my $o (@lang_order_list) {
8800 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8805 foreach my $m (@$mods) {
8806 my $c = $m->{'category'};
8807 next if ($cats{$c});
8808 if (defined($catnames{$c})) {
8809 $cats{$c} = $catnames{$c};
8811 elsif ($text{"category_$c"}) {
8812 $cats{$c} = $text{"category_$c"};
8815 # try to get category name from module ..
8816 my %mtext = &load_language($m->{'dir'});
8817 if ($mtext{"category_$c"}) {
8818 $cats{$c} = $mtext{"category_$c"};
8821 $c = $m->{'category'} = "";
8822 $cats{$c} = $text{"category_$c"};
8829 =head2 is_readonly_mode
8831 Returns 1 if the current user is in read-only mode, and thus all writes
8832 to files and command execution should fail.
8835 sub is_readonly_mode
8837 if (!defined($main::readonly_mode_cache)) {
8838 my %gaccess = &get_module_acl(undef, "");
8839 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8841 return $main::readonly_mode_cache;
8844 =head2 command_as_user(user, with-env?, command, ...)
8846 Returns a command to execute some command as the given user, using the
8847 su statement. If on Linux, the /bin/sh shell is forced in case the user
8848 does not have a valid shell. If with-env is set to 1, the -s flag is added
8849 to the su command to read the user's .profile or .bashrc file.
8854 my ($user, $env, @args) = @_;
8855 my @uinfo = getpwnam($user);
8856 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8857 # User shell doesn't appear to be valid
8858 if ($gconfig{'os_type'} =~ /-linux$/) {
8859 # Use -s /bin/sh to force it
8860 $shellarg = " -s /bin/sh";
8862 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8863 $gconfig{'os_type'} eq 'solaris' &&
8864 $gconfig{'os_version'} >= 11 ||
8865 $gconfig{'os_type'} eq 'macos') {
8866 # Use -m and force /bin/sh
8867 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8871 my $rv = "su".($env ? " -" : "").$shellarg.
8872 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8876 =head2 list_osdn_mirrors(project, file)
8878 This function is now deprecated in favor of letting sourceforge just
8879 redirect to the best mirror, and now just returns their primary download URL.
8882 sub list_osdn_mirrors
8884 my ($project, $file) = @_;
8885 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8887 'mirror' => 'downloads' } );
8890 =head2 convert_osdn_url(url)
8892 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8893 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8894 to a real URL on the sourceforge download redirector.
8897 sub convert_osdn_url
8900 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8901 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8902 # Always use the Sourceforge mail download URL, which does
8903 # a location-based redirect for us
8904 my ($project, $file) = ($1, $2);
8905 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8907 return wantarray ? ( $url, 0 ) : $url;
8910 # Some other source .. don't change
8911 return wantarray ? ( $url, 2 ) : $url;
8915 =head2 get_current_dir
8917 Returns the directory the current process is running in.
8923 if ($gconfig{'os_type'} eq 'windows') {
8936 =head2 supports_users
8938 Returns 1 if the current OS supports Unix user concepts and functions like
8939 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8945 return $gconfig{'os_type'} ne 'windows';
8948 =head2 supports_symlinks
8950 Returns 1 if the current OS supports symbolic and hard links. This will not
8951 be the case on Windows.
8954 sub supports_symlinks
8956 return $gconfig{'os_type'} ne 'windows';
8959 =head2 quote_path(path)
8961 Returns a path with safe quoting for the current operating system.
8967 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8968 # Windows only supports "" style quoting
8972 return quotemeta($path);
8976 =head2 get_windows_root
8978 Returns the base windows system directory, like c:/windows.
8981 sub get_windows_root
8983 if ($ENV{'SystemRoot'}) {
8984 my $rv = $ENV{'SystemRoot'};
8989 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8993 =head2 read_file_contents(file)
8995 Given a filename, returns its complete contents as a string. Effectively
8996 the same as the Perl construct `cat file`.
8999 sub read_file_contents
9001 &open_readfile(FILE, $_[0]) || return undef;
9008 =head2 unix_crypt(password, salt)
9010 Performs Unix encryption on a password, using the built-in crypt function or
9011 the Crypt::UnixCrypt module if the former does not work. The salt parameter
9012 must be either an already-hashed password, or a two-character alpha-numeric
9018 my ($pass, $salt) = @_;
9019 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
9020 my $rv = eval "crypt(\$pass, \$salt)";
9022 return $rv if ($rv && !$@);
9023 eval "use Crypt::UnixCrypt";
9025 return Crypt::UnixCrypt::crypt($pass, $salt);
9028 &error("Failed to encrypt password : $err");
9032 =head2 split_quoted_string(string)
9034 Given a string like I<foo "bar baz" quux>, returns the array :
9038 sub split_quoted_string
9042 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
9043 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
9044 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
9051 =head2 write_to_http_cache(url, file|&data)
9053 Updates the Webmin cache with the contents of the given file, possibly also
9054 clearing out old data. Mainly for internal use by http_download.
9057 sub write_to_http_cache
9059 my ($url, $file) = @_;
9060 return 0 if (!$gconfig{'cache_size'});
9062 # Don't cache downloads that look dynamic
9063 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
9067 # Check if the current module should do caching
9068 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9069 # Caching all except some modules
9070 my @mods = split(/\s+/, $1);
9071 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9073 elsif ($gconfig{'cache_mods'}) {
9074 # Only caching some modules
9075 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9076 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9082 $size = length($$file);
9085 my @st = stat($file);
9089 if ($size > $gconfig{'cache_size'}) {
9090 # Bigger than the whole cache - so don't save it
9095 $cfile = "$main::http_cache_directory/$cfile";
9097 # See how much we have cached currently, clearing old files
9099 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
9100 opendir(CACHEDIR, $main::http_cache_directory);
9101 foreach my $f (readdir(CACHEDIR)) {
9102 next if ($f eq "." || $f eq "..");
9103 my $path = "$main::http_cache_directory/$f";
9104 my @st = stat($path);
9105 if ($gconfig{'cache_days'} &&
9106 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9107 # This file is too old .. trash it
9112 push(@cached, [ $path, $st[7], $st[9] ]);
9116 @cached = sort { $a->[2] <=> $b->[2] } @cached;
9117 while($total+$size > $gconfig{'cache_size'} && @cached) {
9118 # Cache is too big .. delete some files until the new one will fit
9119 unlink($cached[0]->[0]);
9120 $total -= $cached[0]->[1];
9124 # Finally, write out the new file
9126 &open_tempfile(CACHEFILE, ">$cfile");
9127 &print_tempfile(CACHEFILE, $$file);
9128 &close_tempfile(CACHEFILE);
9131 my ($ok, $err) = ©_source_dest($file, $cfile);
9137 =head2 check_in_http_cache(url)
9139 If some URL is in the cache and valid, return the filename for it. Mainly
9140 for internal use by http_download.
9143 sub check_in_http_cache
9146 return undef if (!$gconfig{'cache_size'});
9148 # Check if the current module should do caching
9149 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9150 # Caching all except some modules
9151 my @mods = split(/\s+/, $1);
9152 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9154 elsif ($gconfig{'cache_mods'}) {
9155 # Only caching some modules
9156 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9157 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9162 $cfile = "$main::http_cache_directory/$cfile";
9163 my @st = stat($cfile);
9164 return undef if (!@st || !$st[7]);
9165 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9170 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9175 =head2 supports_javascript
9177 Returns 1 if the current browser is assumed to support javascript.
9180 sub supports_javascript
9182 if (defined(&theme_supports_javascript)) {
9183 return &theme_supports_javascript();
9185 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9188 =head2 get_module_name
9190 Returns the name of the Webmin module that called this function. For internal
9191 use only by other API functions.
9196 return &get_module_variable('$module_name');
9199 =head2 get_module_variable(name, [ref])
9201 Returns the value of some variable which is set in the caller's context, if
9202 using the new WebminCore package. For internal use only.
9205 sub get_module_variable
9207 my ($v, $wantref) = @_;
9208 my $slash = $wantref ? "\\" : "";
9209 my $thispkg = &web_libs_package();
9210 if ($thispkg eq 'WebminCore') {
9211 my ($vt, $vn) = split('', $v, 2);
9213 for(my $i=0; ($callpkg) = caller($i); $i++) {
9214 last if ($callpkg ne $thispkg);
9216 return eval "${slash}${vt}${callpkg}::${vn}";
9218 return eval "${slash}${v}";
9221 =head2 clear_time_locale()
9223 Temporarily force the locale to C, until reset_time_locale is called. This is
9224 useful if your code is going to call C<strftime> from the POSIX package, and
9225 you want to ensure that the output is in a consistent format.
9228 sub clear_time_locale
9230 if ($main::clear_time_locale_count == 0) {
9233 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9234 POSIX::setlocale(POSIX::LC_TIME, "C");
9237 $main::clear_time_locale_count++;
9240 =head2 reset_time_locale()
9242 Revert the locale to whatever it was before clear_time_locale was called
9245 sub reset_time_locale
9247 if ($main::clear_time_locale_count == 1) {
9249 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9250 $main::clear_time_locale_old = undef;
9253 $main::clear_time_locale_count--;
9256 =head2 callers_package(filehandle)
9258 Convert a non-module filehandle like FOO to one qualified with the
9259 caller's caller's package, like fsdump::FOO. For internal use only.
9265 my $callpkg = (caller(1))[0];
9266 my $thispkg = &web_libs_package();
9267 if (!ref($fh) && $fh !~ /::/ &&
9268 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9269 $fh = $callpkg."::".$fh;
9274 =head2 web_libs_package()
9276 Returns the package this code is in. We can't always trust __PACKAGE__. For
9280 sub web_libs_package
9282 if ($called_from_webmin_core) {
9283 return "WebminCore";
9288 =head2 get_userdb_string
9290 Returns the URL-style string for connecting to the users and groups database
9293 sub get_userdb_string
9295 return undef if ($main::no_miniserv_userdb);
9297 &get_miniserv_config(\%miniserv);
9298 return $miniserv{'userdb'};
9301 =head2 connect_userdb(string)
9303 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9304 On failure returns an error message string. In an array context, returns the
9311 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9312 if ($proto eq "mysql") {
9313 # Connect to MySQL with DBI
9314 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9315 $drh || return $text{'sql_emysqldriver'};
9316 my ($host, $port) = split(/:/, $host);
9317 my $cstr = "database=$prefix;host=$host";
9318 $cstr .= ";port=$port" if ($port);
9319 my $dbh = $drh->connect($cstr, $user, $pass, { });
9320 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9321 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9323 elsif ($proto eq "postgresql") {
9324 # Connect to PostgreSQL with DBI
9325 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9326 $drh || return $text{'sql_epostgresqldriver'};
9327 my ($host, $port) = split(/:/, $host);
9328 my $cstr = "dbname=$prefix;host=$host";
9329 $cstr .= ";port=$port" if ($port);
9330 my $dbh = $drh->connect($cstr, $user, $pass);
9331 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9332 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9334 elsif ($proto eq "ldap") {
9335 # Connect with perl LDAP module
9336 eval "use Net::LDAP";
9337 $@ && return $text{'sql_eldapdriver'};
9338 my ($host, $port) = split(/:/, $host);
9339 my $scheme = $args->{'scheme'} || 'ldap';
9341 $port = $scheme eq 'ldaps' ? 636 : 389;
9343 my $ldap = Net::LDAP->new($host,
9345 'scheme' => $scheme);
9346 $ldap || return &text('sql_eldapconnect', $host);
9348 if ($args->{'tls'}) {
9349 # Switch to TLS mode
9350 eval { $mesg = $ldap->start_tls(); };
9351 if ($@ || !$mesg || $mesg->code) {
9352 return &text('sql_eldaptls',
9353 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9356 # Login to the server
9358 $mesg = $ldap->bind(dn => $user, password => $pass);
9361 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9363 if (!$mesg || $mesg->code) {
9364 return &text('sql_eldaplogin', $user,
9365 $mesg ? $mesg->error : "Unknown error");
9367 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9370 return "Unknown protocol $proto";
9374 =head2 disconnect_userdb(string, &handle)
9376 Closes a handle opened by connect_userdb
9379 sub disconnect_userdb
9382 if ($str =~ /^(mysql|postgresql):/) {
9384 if (!$h->{'AutoCommit'}) {
9389 elsif ($str =~ /^ldap:/) {
9396 =head2 split_userdb_string(string)
9398 Converts a string like mysql://user:pass@host/db into separate parts
9401 sub split_userdb_string
9404 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9405 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9406 ($1, $2, $3, $4, $5, $7);
9407 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9408 return ($proto, $user, $pass, $host, $prefix, \%args);
9413 $done_web_lib_funcs = 1;