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 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
20 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
21 %done_foreign_require $webmin_feedback_address
22 $user_skill_level $pragma_no_cache $foreign_args);
24 use vars qw($module_index_name $number_to_month_map $month_to_number_map
25 $umask_already $default_charset $licence_status $os_type
26 $licence_message $script_name $loaded_theme_oo_library
27 $done_web_lib_funcs $os_version $module_index_link
28 $called_from_webmin_core);
30 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
32 Fill the given hash reference with name=value pairs from a file. The required
35 =item file - The file to head, which must be text with each line like name=value
37 =item hash - The hash reference to add values read from the file to.
39 =item order - If given, an array reference to add names to in the order they were read
41 =item lowercase - If set to 1, names are converted to lower case
43 =item split-char - If set, names and values are split on this character instead of =
49 my $split = defined($_[4]) ? $_[4] : "=";
50 my $realfile = &translate_filename($_[0]);
51 &open_readfile(ARFILE, $_[0]) || return 0;
54 my $hash = index($_, "#");
55 my $eq = index($_, $split);
56 if ($hash != 0 && $eq >= 0) {
57 my $n = substr($_, 0, $eq);
58 my $v = substr($_, $eq+1);
60 $_[1]->{$_[3] ? lc($n) : $n} = $v;
61 push(@{$_[2]}, $n) if ($_[2]);
65 $main::read_file_missing{$realfile} = 0; # It exists now
66 if (defined($main::read_file_cache{$realfile})) {
67 %{$main::read_file_cache{$realfile}} = %{$_[1]};
72 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
74 Like read_file, but reads from an in-memory cache if the file has already been
75 read in this Webmin script. Recommended, as it behaves exactly the same as
76 read_file, but can be much faster.
81 my $realfile = &translate_filename($_[0]);
82 if (defined($main::read_file_cache{$realfile})) {
84 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
87 elsif ($main::read_file_missing{$realfile}) {
88 # Doesn't exist, so don't re-try read
92 # Actually read the file
94 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
95 %{$main::read_file_cache{$realfile}} = %d;
96 %{$_[1]} = ( %{$_[1]}, %d );
100 # Flag as non-existant
101 $main::read_file_missing{$realfile} = 1;
107 =head2 write_file(file, &hash, [join-char])
109 Write out the contents of a hash as name=value lines. The parameters are :
111 =item file - Full path to write to
113 =item hash - A hash reference containing names and values to output
115 =item join-char - If given, names and values are separated by this instead of =
121 my $join = defined($_[2]) ? $_[2] : "=";
122 my $realfile = &translate_filename($_[0]);
123 &read_file($_[0], \%old, \@order);
124 &open_tempfile(ARFILE, ">$_[0]");
125 foreach $k (@order) {
126 if (exists($_[1]->{$k})) {
127 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
128 &error(&text("efilewrite", $realfile, $!));
131 foreach $k (keys %{$_[1]}) {
132 if (!exists($old{$k})) {
133 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
134 &error(&text("efilewrite", $realfile, $!));
137 &close_tempfile(ARFILE);
138 if (defined($main::read_file_cache{$realfile})) {
139 %{$main::read_file_cache{$realfile}} = %{$_[1]};
141 if (defined($main::read_file_missing{$realfile})) {
142 $main::read_file_missing{$realfile} = 0;
146 =head2 html_escape(string)
148 Converts &, < and > codes in text to HTML entities, and returns the new string.
149 This should be used when including data read from other sources in HTML pages.
158 $tmp =~ s/\"/"/g;
159 $tmp =~ s/\'/'/g;
164 =head2 quote_escape(string, [only-quote])
166 Converts ' and " characters in a string into HTML entities, and returns it.
167 Useful for outputing HTML tag values.
172 my ($tmp, $only) = @_;
173 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
174 # convert &, unless it is part of &#nnn; or &foo;
175 $tmp =~ s/&([^#])/&$1/g;
177 $tmp =~ s/&$/&/g;
178 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
179 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
183 =head2 tempname([filename])
185 Returns a mostly random temporary file name, typically under the /tmp/.webmin
186 directory. If filename is given, this will be the base name used. Otherwise
187 a unique name is selected randomly.
192 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
193 $gconfig{'tempdir_'.&get_module_name()} :
194 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
195 $ENV{'TEMP'} ? $ENV{'TEMP'} :
196 $ENV{'TMP'} ? $ENV{'TMP'} :
197 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
198 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
199 "$remote_user_info[7]/.tmp" :
200 @remote_user_info ? $tmp_base."-".$remote_user :
201 $< != 0 ? $tmp_base."-".getpwuid($<) :
203 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
204 # On Windows system, just create temp dir if missing
206 mkdir($tmp_dir, 0755) ||
207 &error("Failed to create temp directory $tmp_dir : $!");
211 # On Unix systems, need to make sure temp dir is valid
213 while($tries++ < 10) {
214 my @st = lstat($tmp_dir);
215 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
217 unlink($tmp_dir) || rmdir($tmp_dir) ||
218 system("/bin/rm -rf ".quotemeta($tmp_dir));
220 mkdir($tmp_dir, 0755) || next;
221 chown($<, $(, $tmp_dir);
222 chmod(0755, $tmp_dir);
225 my @st = lstat($tmp_dir);
226 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
230 if (defined($_[0]) && $_[0] !~ /\.\./) {
231 $rv = "$tmp_dir/$_[0]";
234 $main::tempfilecount++;
236 $rv = $tmp_dir."/".int(rand(1000000))."_".
237 $main::tempfilecount."_".$scriptname;
242 =head2 transname([filename])
244 Behaves exactly like tempname, but records the temp file for deletion when the
245 current Webmin script process exits.
250 my $rv = &tempname(@_);
251 push(@main::temporary_files, $rv);
255 =head2 trunc(string, maxlen)
257 Truncates a string to the shortest whole word less than or equal to the
258 given width. Useful for word wrapping.
263 if (length($_[0]) <= $_[1]) {
266 my $str = substr($_[0],0,$_[1]);
275 =head2 indexof(string, value, ...)
277 Returns the index of some value in an array of values, or -1 if it was not
283 for(my $i=1; $i <= $#_; $i++) {
284 if ($_[$i] eq $_[0]) { return $i - 1; }
289 =head2 indexoflc(string, value, ...)
291 Like indexof, but does a case-insensitive match
296 my $str = lc(shift(@_));
297 my @arr = map { lc($_) } @_;
298 return &indexof($str, @arr);
301 =head2 sysprint(handle, [string]+)
303 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
304 as a replacement for print when writing to pipes or sockets.
309 my $fh = &callers_package($_[0]);
310 my $str = join('', @_[1..$#_]);
311 syswrite $fh, $str, length($str);
314 =head2 check_ipaddress(ip)
316 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
321 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
322 $1 >= 0 && $1 <= 255 &&
323 $2 >= 0 && $2 <= 255 &&
324 $3 >= 0 && $3 <= 255 &&
325 $4 >= 0 && $4 <= 255;
328 =head2 check_ip6address(ip)
330 Check if some IPv6 address is properly formatted, and returns 1 if so.
335 my @blocks = split(/:/, $_[0]);
336 return 0 if (@blocks == 0 || @blocks > 8);
338 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
339 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
340 # value is in [0;128].
342 my $where = index($blocks[$ib],"/");
345 my $b = substr($blocks[$ib],0,$where);
346 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
350 # The netmask must take its value in [0;128]
351 return 0 if ($m <0 || $m >128);
353 # Check the different blocks of the address : 16 bits block in hexa notation.
354 # Possibility of 1 empty block or 2 if the address begins with "::".
357 foreach $b (@blocks) {
358 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
359 $empty++ if ($b eq "");
361 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
367 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
369 Prints HTML for an icon image. The parameters are :
371 =item image - URL for the image, like images/foo.gif
373 =item title - Text to appear under the icon
375 =item link - Optional destination for the icon's link
377 =item href - Other HTML attributes to be added to the <a href> for the link
379 =item width - Optional width of the icon
381 =item height - Optional height of the icon
383 =item before-title - HTML to appear before the title link, but which is not actually in the link
385 =item after-title - HTML to appear after the title link, but which is not actually in the link
390 &load_theme_library();
391 if (defined(&theme_generate_icon)) {
392 &theme_generate_icon(@_);
395 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
396 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
397 if ($tconfig{'noicons'}) {
399 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
402 print "$_[6]$_[1]$_[7]\n";
406 print "<table border><tr><td width=48 height=48>\n",
407 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
408 "$w $h></a></td></tr></table>\n";
409 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
412 print "<table border><tr><td width=48 height=48>\n",
413 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
414 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
420 Converts a string to a form ok for putting in a URL, using % escaping.
426 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
430 =head2 un_urlize(string)
432 Converts a URL-encoded string to it's original contents - the reverse of the
440 $rv =~ s/%(..)/pack("c",hex($1))/ge;
444 =head2 include(filename)
446 Read and output the contents of the given file.
452 open(INCLUDE, &translate_filename($_[0])) || return 0;
460 =head2 copydata(in-handle, out-handle)
462 Read from one file handle and write to another, until there is no more to read.
468 $in = &callers_package($in);
469 $out = &callers_package($out);
471 while(read($in, $buf, 1024) > 0) {
472 (print $out $buf) || return 0;
477 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
479 Read data submitted via a POST request using the multipart/form-data coding,
480 and store it in the global %in hash. The optional parameters are :
482 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
484 =item cbfunc - A function reference to call after reading each block of data.
486 =item cbargs - Additional parameters to the callback function.
491 my ($max, $cbfunc, $cbargs) = @_;
492 my ($boundary, $line, $foo, $name, $got, $file);
493 my $err = &text('readparse_max', $max);
494 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
495 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
498 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
500 <STDIN>; # skip first boundary
503 # Read section headers
507 $got += length($line);
508 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
509 if ($max && $got > $max) {
514 if ($line =~ /^(\S+):\s*(.*)$/) {
515 $header{$lastheader = lc($1)} = $2;
517 elsif ($line =~ /^\s+(.*)$/) {
518 $header{$lastheader} .= $line;
522 # Parse out filename and type
523 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
525 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
530 $foo = $name . "_$1";
537 &error($text{'readparse_cdheader'});
539 if ($header{'content-type'} =~ /^([^\s;]+)/) {
540 $foo = $name . "_content_type";
543 $file = $in{$name."_filename"};
546 $in{$name} .= "\0" if (defined($in{$name}));
549 $got += length($line);
550 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
552 if ($max && $got > $max) {
553 #print STDERR "over limit of $max\n";
558 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
563 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
564 if (index($line, $boundary) != -1) { last; }
567 chop($in{$name}); chop($in{$name});
568 if (index($line,"$boundary--") != -1) { last; }
570 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
573 =head2 ReadParse([&hash], [method], [noplus])
575 Fills the given hash reference with CGI parameters, or uses the global hash
576 %in if none is given. Also sets the global variables $in and @in. The other
579 =item method - For use of this HTTP method, such as GET
581 =item noplus - Don't convert + in parameters to spaces.
586 my $a = $_[0] || \%in;
588 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
590 if ($meth eq 'POST') {
591 my $clen = $ENV{'CONTENT_LENGTH'};
592 &read_fully(STDIN, \$in, $clen) == $clen ||
593 &error("Failed to read POST input : $!");
595 if ($ENV{'QUERY_STRING'}) {
596 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
597 else { $in = $ENV{'QUERY_STRING'}; }
599 @in = split(/\&/, $in);
600 foreach my $i (@in) {
601 my ($k, $v) = split(/=/, $i, 2);
606 $k =~ s/%(..)/pack("c",hex($1))/ge;
607 $v =~ s/%(..)/pack("c",hex($1))/ge;
608 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
612 =head2 read_fully(fh, &buffer, length)
614 Read data from some file handle up to the given length, even in the face
615 of partial reads. Reads the number of bytes read. Stores received data in the
616 string pointed to be the buffer reference.
621 my ($fh, $buf, $len) = @_;
622 $fh = &callers_package($fh);
625 my $r = read(STDIN, $$buf, $len-$got, $got);
632 =head2 read_parse_mime_callback(size, totalsize, upload-id)
634 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
635 the file on every 1% change though. For internal use by the upload progress
639 sub read_parse_mime_callback
641 my ($size, $totalsize, $filename, $id) = @_;
642 return if ($gconfig{'no_upload_tracker'});
645 # Create the upload tracking directory - if running as non-root, this has to
646 # be under the user's home
649 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
650 $vardir = "$uinfo[7]/.tmp";
653 $vardir = $ENV{'WEBMIN_VAR'};
656 &make_dir($vardir, 0755);
659 # Remove any upload.* files more than 1 hour old
660 if (!$main::read_parse_mime_callback_flushed) {
662 opendir(UPDIR, $vardir);
663 foreach my $f (readdir(UPDIR)) {
664 next if ($f !~ /^upload\./);
665 my @st = stat("$vardir/$f");
666 if ($st[9] < $now-3600) {
667 unlink("$vardir/$f");
671 $main::read_parse_mime_callback_flushed++;
674 # Only update file once per percent
675 my $upfile = "$vardir/upload.$id";
676 if ($totalsize && $size >= 0) {
677 my $pc = int(100 * $size / $totalsize);
678 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
681 $main::read_parse_mime_callback_pc{$upfile} = $pc;
685 &open_tempfile(UPFILE, ">$upfile");
686 print UPFILE $size,"\n";
687 print UPFILE $totalsize,"\n";
688 print UPFILE $filename,"\n";
689 &close_tempfile(UPFILE);
692 =head2 read_parse_mime_javascript(upload-id, [&fields])
694 Returns an onSubmit= Javascript statement to popup a window for tracking
695 an upload with the given ID. For internal use by the upload progress tracker.
698 sub read_parse_mime_javascript
700 my ($id, $fields) = @_;
701 return "" if ($gconfig{'no_upload_tracker'});
702 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
704 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
705 return "onSubmit='if ($if) { $opener }'";
708 return "onSubmit='$opener'";
712 =head2 PrintHeader(charset)
714 Outputs the HTTP headers for an HTML page. The optional charset parameter
715 can be used to set a character set. Normally this function is not called
716 directly, but is rather called by ui_print_header or header.
721 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
722 print "pragma: no-cache\n";
723 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
724 print "Cache-Control: no-store, no-cache, must-revalidate\n";
725 print "Cache-Control: post-check=0, pre-check=0\n";
727 if (defined($_[0])) {
728 print "Content-type: text/html; Charset=$_[0]\n\n";
731 print "Content-type: text/html\n\n";
735 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
737 Outputs a Webmin HTML page header with a title, including HTTP headers. The
740 =item title - The text to show at the top of the page
742 =item image - An image to show instead of the title text. This is typically left blank.
744 =item help - If set, this is the name of a help page that will be linked to in the title.
746 =item config - If set to 1, the title will contain a link to the module's config page.
748 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
750 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
752 =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.
754 =item head-stuff - HTML to be included in the <head> section of the page.
756 =item body-stuff - HTML attributes to be include in the <body> tag.
758 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
763 return if ($main::done_webmin_header++);
765 my $charset = defined($main::force_charset) ? $main::force_charset
767 &PrintHeader($charset);
768 &load_theme_library();
769 if (defined(&theme_header)) {
770 $module_name = &get_module_name();
774 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
777 if (defined(&theme_prehead)) {
781 print "<meta http-equiv=\"Content-Type\" ",
782 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
785 my $title = &get_html_title($_[0]);
786 print "<title>$title</title>\n";
787 print $_[7] if ($_[7]);
788 print &get_html_status_line(0);
790 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
791 if ($tconfig{'headinclude'}) {
792 print &read_file_contents(
793 "$theme_root_directory/$tconfig{'headinclude'}");
796 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
797 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
798 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
799 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
800 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
801 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
802 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
804 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
806 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
807 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
808 if (defined(&theme_prebody)) {
811 my $hostname = &get_display_hostname();
812 my $version = &get_webmin_version();
813 my $prebody = $tconfig{'prebody'};
815 $prebody =~ s/%HOSTNAME%/$hostname/g;
816 $prebody =~ s/%VERSION%/$version/g;
817 $prebody =~ s/%USER%/$remote_user/g;
818 $prebody =~ s/%OS%/$os_type $os_version/g;
821 if ($tconfig{'prebodyinclude'}) {
823 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
830 print $tconfig{'preheader'};
831 my %this_module_info = &get_module_info(&get_module_name());
832 print "<table class='header' width=100%><tr>\n";
833 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
834 print "<td id='headln1' colspan=3 align=center>\n";
835 print &get_html_status_line(1);
836 print "</td></tr> <tr>\n";
838 print "<td id='headln2l' width=15% valign=top align=left>";
839 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
840 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
841 "$text{'header_servers'}</a><br>\n";
843 if (!$_[5] && !$tconfig{'noindex'}) {
844 my @avail = &get_available_module_infos(1);
845 my $nolo = $ENV{'ANONYMOUS_USER'} ||
846 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
847 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
848 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
850 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
851 "$text{'main_logout'}</a><br>";
853 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
854 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
855 "$text{'main_switch'}</a><br>";
857 elsif (!$gconfig{'gotoone'} || @avail > 1) {
858 print "<a href='$gconfig{'webprefix'}/?cat=",
859 $this_module_info{'category'},
860 "'>$text{'header_webmin'}</a><br>\n";
863 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
864 my $idx = $this_module_info{'index_link'};
865 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
866 my $mt = $module_index_name || $text{'header_module'};
867 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
869 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
870 !$tconfig{'nohelp'}) {
871 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
874 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
875 !$tconfig{'nohelp'}) {
876 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
879 my %access = &get_module_acl();
880 if (!$access{'noconfig'} && !$config{'noprefs'}) {
881 my $cprog = $user_module_config_directory ?
882 "uconfig.cgi" : "config.cgi";
883 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
884 &get_module_name()."\">",
885 $text{'header_config'},"</a><br>\n";
890 # Title is a single image
891 print "<td id='headln2c' align=center width=70%>",
892 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
896 my $ts = defined($tconfig{'titlesize'}) ?
897 $tconfig{'titlesize'} : "+2";
898 print "<td id='headln2c' align=center width=70%>",
899 ($ts ? "<font size=$ts>" : ""),$_[0],
900 ($ts ? "</font>" : "");
901 print "<br>$_[9]\n" if ($_[9]);
904 print "<td id='headln2r' width=15% valign=top align=right>";
906 print "</td></tr></table>\n";
907 print $tconfig{'postheader'};
911 =head2 get_html_title(title)
913 Returns the full string to appear in the HTML <title> block.
920 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
921 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
922 my $host = &get_display_hostname();
923 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
924 $title = sprintf "%s : %s on %s (%s %s)\n",
925 $msg, $remote_user, $host,
926 $os_type, $os_version;
928 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
929 $title = sprintf "%s on %s (%s %s)\n",
931 $os_type, $os_version;
936 if ($gconfig{'showlogin'} && $remote_user) {
937 $title = $remote_user.($title ? " : ".$title : "");
939 if ($gconfig{'showhost'}) {
940 $title = $host.($title ? " : ".$title : "");
945 =head2 get_html_framed_title
947 Returns the title text for a framed theme main page.
950 sub get_html_framed_title
953 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
954 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
956 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
957 # Alternate title mode requested
958 $title = sprintf "%s on %s (%s %s)\n",
959 $remote_user, &get_display_hostname(),
960 $os_type, $os_version;
963 # Title like 'Webmin x.yy on hostname (Linux 6)'
964 if ($os_version eq "*") {
968 $ostr = "$os_type $os_version";
970 my $host = &get_display_hostname();
971 my $ver = &get_webmin_version();
972 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
973 $gconfig{'showhost'} ? &text('main_title3', $ver, $ostr) :
974 &text('main_title', $ver, $host, $ostr);
975 if ($gconfig{'showlogin'}) {
976 $title = $remote_user.($title ? " : ".$title : "");
978 if ($gconfig{'showhost'}) {
979 $title = $host.($title ? " : ".$title : "");
985 =head2 get_html_status_line(text-only)
987 Returns HTML for a script block that sets the status line, or if text-only
988 is set to 1, just return the status line text.
991 sub get_html_status_line
994 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
995 # Disabled in this mode
998 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
999 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
1000 my $line = &text('header_statusmsg',
1001 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
1003 ($ENV{'SSL_USER'} ? " (SSL certified)" :
1004 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1005 $text{'programname'},
1006 &get_webmin_version(),
1007 &get_display_hostname(),
1008 $os_type.($os_version eq "*" ? "" :" $os_version"));
1013 $line =~ s/\r|\n//g;
1014 return "<script language=JavaScript type=text/javascript>\n".
1015 "defaultStatus=\""."e_escape($line)."\";\n".
1020 =head2 popup_header([title], [head-stuff], [body-stuff], [no-body])
1022 Outputs a page header, suitable for a popup window. If no title is given,
1023 absolutely no decorations are output. Also useful in framesets. The parameters
1026 =item title - Title text for the popup window.
1028 =item head-stuff - HTML to appear in the <head> section.
1030 =item body-stuff - HTML attributes to be include in the <body> tag.
1032 =item no-body - If set to 1, don't generate a body tag
1037 return if ($main::done_webmin_header++);
1039 my $charset = defined($main::force_charset) ? $main::force_charset
1041 &PrintHeader($charset);
1042 &load_theme_library();
1043 if (defined(&theme_popup_header)) {
1044 &theme_popup_header(@_);
1047 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1050 if (defined(&theme_popup_prehead)) {
1051 &theme_popup_prehead(@_);
1053 print "<title>$_[0]</title>\n";
1055 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1056 if ($tconfig{'headinclude'}) {
1057 print &read_file_contents(
1058 "$theme_root_directory/$tconfig{'headinclude'}");
1061 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1062 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1063 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1064 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1065 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1066 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1067 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1070 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1071 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1072 if (defined(&theme_popup_prebody)) {
1073 &theme_popup_prebody(@_);
1078 =head2 footer([page, name]+, [noendbody])
1080 Outputs the footer for a Webmin HTML page, possibly with links back to other
1081 pages. The links are specified by pairs of parameters, the first of which is
1082 a link destination, and the second the link text. For example :
1084 footer('/', 'Webmin index', '', 'Module menu');
1089 &load_theme_library();
1090 my %this_module_info = &get_module_info(&get_module_name());
1091 if (defined(&theme_footer)) {
1092 $module_name = &get_module_name(); # Old themes use these
1093 %module_info = %this_module_info;
1097 for(my $i=0; $i+1<@_; $i+=2) {
1099 if ($url ne '/' || !$tconfig{'noindex'}) {
1101 $url = "/?cat=$this_module_info{'category'}";
1103 elsif ($url eq '' && &get_module_name()) {
1104 $url = "/".&get_module_name()."/".
1105 $this_module_info{'index_link'};
1107 elsif ($url =~ /^\?/ && &get_module_name()) {
1108 $url = "/".&get_module_name()."/$url";
1110 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1112 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1117 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1122 my $postbody = $tconfig{'postbody'};
1124 my $hostname = &get_display_hostname();
1125 my $version = &get_webmin_version();
1126 my $os_type = $gconfig{'real_os_type'} ||
1127 $gconfig{'os_type'};
1128 my $os_version = $gconfig{'real_os_version'} ||
1129 $gconfig{'os_version'};
1130 $postbody =~ s/%HOSTNAME%/$hostname/g;
1131 $postbody =~ s/%VERSION%/$version/g;
1132 $postbody =~ s/%USER%/$remote_user/g;
1133 $postbody =~ s/%OS%/$os_type $os_version/g;
1134 print "$postbody\n";
1136 if ($tconfig{'postbodyinclude'}) {
1138 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1144 if (defined(&theme_postbody)) {
1145 &theme_postbody(@_);
1147 print "</body></html>\n";
1151 =head2 popup_footer([no-body])
1153 Outputs html for a footer for a popup window, started by popup_header.
1158 &load_theme_library();
1159 if (defined(&theme_popup_footer)) {
1160 &theme_popup_footer(@_);
1169 =head2 load_theme_library
1171 Immediately loads the current theme's theme.pl file. Not generally useful for
1172 most module developers, as this is called automatically by the header function.
1175 sub load_theme_library
1177 return if (!$current_theme || $loaded_theme_library++);
1178 for(my $i=0; $i<@theme_root_directories; $i++) {
1179 if ($theme_configs[$i]->{'functions'}) {
1180 do $theme_root_directories[$i]."/".
1181 $theme_configs[$i]->{'functions'};
1186 =head2 redirect(url)
1188 Output HTTP headers to redirect the browser to some page. The url parameter is
1189 typically a relative URL like index.cgi or list_users.cgi.
1194 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1195 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1196 ":$ENV{'SERVER_PORT'}";
1197 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1198 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1200 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1201 # Absolute URL (like http://...)
1204 elsif ($_[0] =~ /^\//) {
1205 # Absolute path (like /foo/bar.cgi)
1206 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1208 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1209 # Relative URL (like foo.cgi)
1210 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1213 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1215 &load_theme_library();
1216 if (defined(&theme_redirect)) {
1217 $module_name = &get_module_name(); # Old themes use these
1218 %module_info = &get_module_info($module_name);
1219 &theme_redirect($_[0], $url);
1222 print "Location: $url\n\n";
1226 =head2 kill_byname(name, signal)
1228 Finds a process whose command line contains the given name (such as httpd), and
1229 sends some signal to it. The signal can be numeric (like 9) or named
1235 my @pids = &find_byname($_[0]);
1236 return scalar(@pids) if (&is_readonly_mode());
1237 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1238 if ($gconfig{'debug_what_procs'});
1239 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1243 =head2 kill_byname_logged(name, signal)
1245 Like kill_byname, but also logs the killing.
1248 sub kill_byname_logged
1250 my @pids = &find_byname($_[0]);
1251 return scalar(@pids) if (&is_readonly_mode());
1252 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1256 =head2 find_byname(name)
1258 Finds processes searching for the given name in their command lines, and
1259 returns a list of matching PIDs.
1264 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1265 # Linux with /proc filesystem .. use cmdline files, as this is
1266 # faster than forking
1268 opendir(PROCDIR, "/proc");
1269 foreach my $f (readdir(PROCDIR)) {
1270 if ($f eq int($f) && $f != $$) {
1271 my $line = &read_file_contents("/proc/$f/cmdline");
1272 if ($line =~ /$_[0]/) {
1281 if (&foreign_check("proc")) {
1282 # Call the proc module
1283 &foreign_require("proc", "proc-lib.pl");
1284 if (defined(&proc::list_processes)) {
1285 my @procs = &proc::list_processes();
1287 foreach my $p (@procs) {
1288 if ($p->{'args'} =~ /$_[0]/) {
1289 push(@pids, $p->{'pid'});
1292 @pids = grep { $_ != $$ } @pids;
1297 # Fall back to running a command
1299 $cmd = $gconfig{'find_pid_command'};
1300 $cmd =~ s/NAME/"$_[0]"/g;
1301 $cmd = &translate_command($cmd);
1302 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1303 @pids = grep { $_ != $$ } @pids;
1307 =head2 error([message]+)
1309 Display an error message and exit. This should be used by CGI scripts that
1310 encounter a fatal error or invalid user input to notify users of the problem.
1311 If error_setup has been called, the displayed error message will be prefixed
1312 by the message setup using that function.
1317 my $msg = join("", @_);
1318 $msg =~ s/<[^>]*>//g;
1319 if (!$main::error_must_die) {
1320 print STDERR "Error: ",$msg,"\n";
1322 &load_theme_library();
1323 if ($main::error_must_die) {
1324 if ($gconfig{'error_stack'}) {
1325 print STDERR "Error: ",$msg,"\n";
1326 for(my $i=0; my @stack = caller($i); $i++) {
1327 print STDERR "File: $stack[1] Line: $stack[2] ",
1328 "Function: $stack[3]\n";
1333 elsif (!$ENV{'REQUEST_METHOD'}) {
1334 # Show text-only error
1335 print STDERR "$text{'error'}\n";
1336 print STDERR "-----\n";
1337 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1339 print STDERR "-----\n";
1340 if ($gconfig{'error_stack'}) {
1342 print STDERR $text{'error_stack'},"\n";
1343 for(my $i=0; my @stack = caller($i); $i++) {
1344 print STDERR &text('error_stackline',
1345 $stack[1], $stack[2], $stack[3]),"\n";
1350 elsif (defined(&theme_error)) {
1354 &header($text{'error'}, "");
1356 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1358 if ($gconfig{'error_stack'}) {
1360 print "<h3>$text{'error_stack'}</h3>\n";
1362 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1363 "<td><b>$text{'error_line'}</b></td> ",
1364 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1365 for($i=0; my @stack = caller($i); $i++) {
1367 print "<td>$stack[1]</td>\n";
1368 print "<td>$stack[2]</td>\n";
1369 print "<td>$stack[3]</td>\n";
1375 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1376 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1382 &unlock_all_files();
1383 &cleanup_tempnames();
1387 =head2 popup_error([message]+)
1389 This function is almost identical to error, but displays the message with HTML
1390 headers suitable for a popup window.
1395 &load_theme_library();
1396 if ($main::error_must_die) {
1399 elsif (defined(&theme_popup_error)) {
1400 &theme_popup_error(@_);
1403 &popup_header($text{'error'}, "");
1404 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1407 &unlock_all_files();
1408 &cleanup_tempnames();
1412 =head2 error_setup(message)
1414 Registers a message to be prepended to all error messages displayed by the
1420 $main::whatfailed = $_[0];
1423 =head2 wait_for(handle, regexp, regexp, ...)
1425 Reads from the input stream until one of the regexps matches, and returns the
1426 index of the matching regexp, or -1 if input ended before any matched. This is
1427 very useful for parsing the output of interactive programs, and can be used with
1428 a two-way pipe to feed input to a program in response to output matched by
1431 If the matching regexp contains bracketed sub-expressions, their values will
1432 be placed in the global array @matches, indexed starting from 1. You cannot
1433 use the Perl variables $1, $2 and so on to capture matches.
1437 $rv = wait_for($loginfh, "username:");
1439 error("Didn't get username prompt");
1441 print $loginfh "joe\n";
1442 $rv = wait_for($loginfh, "password:");
1444 error("Didn't get password prompt");
1446 print $loginfh "smeg\n";
1451 my ($c, $i, $sw, $rv, $ha);
1452 undef($wait_for_input);
1453 if ($wait_for_debug) {
1454 print STDERR "wait_for(",join(",", @_),")\n";
1456 $ha = &callers_package($_[0]);
1457 if ($wait_for_debug) {
1458 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1463 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1464 " \$wait_for_input .= \$c;\n";
1465 if ($wait_for_debug) {
1466 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1468 for($i=1; $i<@_; $i++) {
1469 $sw = $i>1 ? "elsif" : "if";
1470 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1473 " if (defined(\$hit)) {\n".
1474 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1480 &error("wait_for error : $@\n");
1485 =head2 fast_wait_for(handle, string, string, ...)
1487 This function behaves very similar to wait_for (documented above), but instead
1488 of taking regular expressions as parameters, it takes strings. As soon as the
1489 input contains one of them, it will return the index of the matching string.
1490 If the input ends before any match, it returns -1.
1495 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1496 for($i=1; $i<@_; $i++) {
1497 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1501 if (($c = getc($ha)) eq "") {
1502 &error("fast_wait_for read error : $!");
1505 if (length($inp) > $maxlen) {
1506 $inp = substr($inp, length($inp)-$maxlen);
1508 $inpl = length($inp);
1509 for($i=1; $i<@_; $i++) {
1510 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1517 =head2 has_command(command)
1519 Returns the full path to the executable if some command is in the path, or
1520 undef if not found. If the given command is already an absolute path and
1521 exists, then the same path will be returned.
1526 if (!$_[0]) { return undef; }
1527 if (exists($main::has_command_cache{$_[0]})) {
1528 return $main::has_command_cache{$_[0]};
1531 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1532 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1533 # Absolute path given - just use it
1534 my $t = &translate_filename($_[0]);
1535 $rv = (-x $t && !-d _) ? $_[0] : undef;
1538 # Check each directory in the path
1540 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1541 next if ($donedir{$d}++);
1542 $d =~ s/$slash$// if ($d ne $slash);
1543 my $t = &translate_filename("$d/$_[0]");
1544 if (-x $t && !-d _) {
1545 $rv = $d.$slash.$_[0];
1548 if ($gconfig{'os_type'} eq 'windows') {
1549 foreach my $sfx (".exe", ".com", ".bat") {
1550 my $t = &translate_filename("$d/$_[0]").$sfx;
1551 if (-r $t && !-d _) {
1552 $rv = $d.$slash.$_[0].$sfx;
1559 $main::has_command_cache{$_[0]} = $rv;
1563 =head2 make_date(seconds, [date-only], [fmt])
1565 Converts a Unix date/time in seconds to a human-readable form, by default
1566 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1568 =item seconds - Unix time is seconds to convert.
1570 =item date-only - If set to 1, exclude the time from the returned string.
1572 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1577 my ($secs, $only, $fmt) = @_;
1578 my @tm = localtime($secs);
1581 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1583 if ($fmt eq 'dd/mon/yyyy') {
1584 $date = sprintf "%2.2d/%s/%4.4d",
1585 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1587 elsif ($fmt eq 'dd/mm/yyyy') {
1588 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1590 elsif ($fmt eq 'mm/dd/yyyy') {
1591 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1593 elsif ($fmt eq 'yyyy/mm/dd') {
1594 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1596 elsif ($fmt eq 'd. mon yyyy') {
1597 $date = sprintf "%d. %s %4.4d",
1598 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1600 elsif ($fmt eq 'dd.mm.yyyy') {
1601 $date = sprintf "%2.2d.%2.2d.%4.4d", $tm[3], $tm[4]+1, $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];
1607 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1612 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1614 Return HTML for a button that pops up a file chooser when clicked, and places
1615 the selected filename into another HTML field. The parameters are :
1617 =item input - Name of the form field to store the filename in.
1619 =item type - 0 for file or directory chooser, or 1 for directory only.
1621 =item form - Index of the form containing the button.
1623 =item chroot - If set to 1, the chooser will be limited to this directory.
1625 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1628 sub file_chooser_button
1630 return &theme_file_chooser_button(@_)
1631 if (defined(&theme_file_chooser_button));
1632 my $form = defined($_[2]) ? $_[2] : 0;
1633 my $chroot = defined($_[3]) ? $_[3] : "/";
1634 my $add = int($_[4]);
1635 my ($w, $h) = (400, 300);
1636 if ($gconfig{'db_sizefile'}) {
1637 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1639 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";
1642 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1644 Returns HTML for a button that will popup a chooser window of some kind. The
1647 =item url - Base URL of the popup window's contents
1649 =item width - Width of the window in pixels
1651 =item height - Height in pixels
1653 =item scrollbars - Set to 1 if the window should have scrollbars
1655 The field-mappings parameter is an array ref of array refs containing
1657 =item - Attribute to assign field to in the popup window
1659 =item - Form field name
1661 =item - CGI parameter to URL for value, if any
1664 sub popup_window_button
1666 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1667 my ($url, $w, $h, $scroll, $fields) = @_;
1668 my $scrollyn = $scroll ? "yes" : "no";
1669 my $rv = "<input type=button onClick='";
1670 foreach my $m (@$fields) {
1671 $rv .= "$m->[0] = form.$m->[1]; ";
1673 my $sep = $url =~ /\?/ ? "&" : "?";
1674 $rv .= "chooser = window.open(\"$url\"";
1675 foreach my $m (@$fields) {
1677 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1681 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1682 foreach my $m (@$fields) {
1683 $rv .= "chooser.$m->[0] = $m->[0]; ";
1684 $rv .= "window.$m->[0] = $m->[0]; ";
1686 $rv .= "' value=\"...\">";
1690 =head2 read_acl(&user-module-hash, &user-list-hash)
1692 Reads the Webmin acl file into the given hash references. The first is indexed
1693 by a combined key of username,module , with the value being set to 1 when
1694 the user has access to that module. The second is indexed by username, with
1695 the value being an array ref of allowed modules.
1697 This function is deprecated in favour of foreign_available, which performs a
1698 more comprehensive check of module availability.
1703 if (!%main::acl_hash_cache) {
1704 # Read from local files
1706 open(ACL, &acl_filename());
1708 if (/^([^:]+):\s*(.*)/) {
1710 my @mods = split(/\s+/, $2);
1711 foreach my $m (@mods) {
1712 $main::acl_hash_cache{$user,$m}++;
1714 $main::acl_array_cache{$user} = \@mods;
1720 my $userdb = &get_userdb_string();
1721 my ($dbh, $proto) = $userdb ? &connect_userdb($userdb) : ( );
1723 if ($proto eq "mysql" || $proto eq "postgresql") {
1724 # Select usernames and modules from SQL DB
1725 my $cmd = $dbh->prepare("select webmin_user.name,webmin_user_attr.value from webmin_user,webmin_user_attr where webmin_user.id = webmin_user_attr.id and webmin_user_attr.attr = 'modules'");
1726 if ($cmd && $cmd->execute()) {
1727 while(my ($user, $mods) = $cmd->fetchrow()) {
1728 my @mods = split(/\s+/, $mods);
1729 foreach my $m (@mods) {
1730 $main::acl_hash_cache{$user,
1733 $main::acl_array_cache{$user} = \@mods;
1738 elsif ($proto eq "ldap") {
1739 # XXX read from LDAP
1741 &disconnect_userdb($userdb, $dbh);
1744 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1745 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1750 Returns the file containing the webmin ACL, which is usually
1751 /etc/webmin/webmin.acl.
1756 return "$config_directory/webmin.acl";
1761 Does nothing, but kept around for compatability.
1768 =head2 get_miniserv_config(&hash)
1770 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1771 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1775 sub get_miniserv_config
1777 return &read_file_cached(
1778 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1781 =head2 put_miniserv_config(&hash)
1783 Writes out the Webmin webserver configuration file from the contents of
1784 the given hash ref. This should be initially populated by get_miniserv_config,
1787 get_miniserv_config(\%miniserv);
1788 $miniserv{'port'} = 10005;
1789 put_miniserv_config(\%miniserv);
1793 sub put_miniserv_config
1795 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1799 =head2 restart_miniserv([nowait])
1801 Kill the old miniserv process and re-start it, then optionally waits for
1802 it to restart. This will apply all configuration settings.
1805 sub restart_miniserv
1808 return undef if (&is_readonly_mode());
1810 &get_miniserv_config(\%miniserv) || return;
1813 if ($gconfig{'os_type'} ne 'windows') {
1814 # On Unix systems, we can restart with a signal
1815 my ($pid, $addr, $i);
1816 $miniserv{'inetd'} && return;
1817 my @oldst = stat($miniserv{'pidfile'});
1818 $pid = $ENV{'MINISERV_PID'};
1820 open(PID, $miniserv{'pidfile'}) ||
1821 &error("Failed to open PID file $miniserv{'pidfile'}");
1824 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1827 # Just signal miniserv to restart
1828 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1830 # Wait till new PID is written, indicating a restart
1831 for($i=0; $i<60; $i++) {
1833 my @newst = stat($miniserv{'pidfile'});
1834 last if ($newst[9] != $oldst[9]);
1836 $i < 60 || &error("Webmin server did not write new PID file");
1838 ## Totally kill the process and re-run it
1839 #$SIG{'TERM'} = 'IGNORE';
1840 #&kill_logged('TERM', $pid);
1841 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1844 # On Windows, we need to use the flag file
1845 open(TOUCH, ">$miniserv{'restartflag'}");
1850 # wait for miniserv to come back up
1851 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1853 for($i=0; $i<20; $i++) {
1855 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1856 my $rv = connect(STEST,
1857 pack_sockaddr_in($miniserv{'port'}, $addr));
1859 last if ($rv && ++$ok >= 2);
1861 $i < 20 || &error("Failed to restart Webmin server!");
1865 =head2 reload_miniserv
1867 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1868 configuration files. Not all changes will be applied though, such as the
1869 IP addresses and ports to accept connections on.
1874 return undef if (&is_readonly_mode());
1876 &get_miniserv_config(\%miniserv) || return;
1878 if ($gconfig{'os_type'} ne 'windows') {
1879 # Send a USR1 signal to re-read the config
1880 my ($pid, $addr, $i);
1881 $miniserv{'inetd'} && return;
1882 $pid = $ENV{'MINISERV_PID'};
1884 open(PID, $miniserv{'pidfile'}) ||
1885 &error("Failed to open PID file $miniserv{'pidfile'}");
1888 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1890 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1892 # Make sure this didn't kill Webmin!
1894 if (!kill(0, $pid)) {
1895 print STDERR "USR1 signal killed Webmin - restarting\n";
1896 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1900 # On Windows, we need to use the flag file
1901 open(TOUCH, ">$miniserv{'reloadflag'}");
1906 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1908 Returns 1 if some module is supported on the current operating system, or the
1909 OS supplies as parameters. The parameters are :
1911 =item minfo - A hash ref of module information, as returned by get_module_info
1913 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1915 =item os-version - The Webmin OS version to use, such as 13.0
1917 =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.
1920 sub check_os_support
1922 my $oss = $_[0]->{'os_support'};
1923 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1924 # May provide usable API
1925 $oss .= " ".$_[0]->{'api_os_support'};
1927 if ($_[0]->{'nozone'} && &running_in_zone()) {
1928 # Not supported in a Solaris Zone
1931 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1932 # Not supported in a Linux Vserver
1935 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1936 # Not supported in an OpenVZ container
1939 return 1 if (!$oss || $oss eq '*');
1940 my $osver = $_[2] || $gconfig{'os_version'};
1941 my $ostype = $_[1] || $gconfig{'os_type'};
1944 my ($os, $ver, $codes);
1945 my ($neg) = ($oss =~ s/^!//); # starts with !
1946 $anyneg++ if ($neg);
1947 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1949 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1951 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1953 $os = $1; $ver = $2; $oss = $3;
1955 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1957 $os = $1; $codes = $2; $oss = $3;
1959 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1961 $codes = $1; $oss = $2;
1963 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1965 $os = $1; $oss = $2;
1968 next if ($os && !($os eq $ostype ||
1969 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1970 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1971 next if ($osver < $1 || $osver > $2);
1973 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1974 next if ($osver < $1);
1976 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1977 next if ($osver > $1);
1980 next if ($ver ne $osver);
1982 next if ($codes && !eval $codes);
1988 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1990 Downloads data from a HTTP url to a local file or string. The parameters are :
1992 =item host - The hostname part of the URL, such as www.google.com
1994 =item port - The HTTP port number, such as 80
1996 =item page - The filename part of the URL, like /index.html
1998 =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.
2000 =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.
2002 =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.
2004 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2006 =item user - If set, HTTP authentication is done with this username.
2008 =item pass - The HTTP password to use with the username above.
2010 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2012 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2014 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2016 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2021 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2022 $timeout, $osdn, $nocache, $headers) = @_;
2023 if ($gconfig{'debug_what_net'}) {
2024 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2025 ($user ? " user=$user pass=$pass" : "").
2026 (ref($dest) ? "" : " dest=$dest"));
2029 # Convert OSDN URL first
2030 my $prot = $ssl ? "https://" : "http://";
2031 my $portstr = $ssl && $port == 443 ||
2032 !$ssl && $port == 80 ? "" : ":$port";
2033 ($host, $port, $page, $ssl) = &parse_http_url(
2034 &convert_osdn_url($prot.$host.$portstr.$page));
2037 # Check if we already have cached the URL
2038 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2039 my $cfile = &check_in_http_cache($url);
2040 if ($cfile && !$nocache) {
2041 # Yes! Copy to dest file or variable
2042 &$cbfunc(6, $url) if ($cbfunc);
2044 &open_readfile(CACHEFILE, $cfile);
2046 $$dest = <CACHEFILE>;
2050 ©_source_dest($cfile, $dest);
2057 push(@headers, [ "Host", $host ]);
2058 push(@headers, [ "User-agent", "Webmin" ]);
2059 push(@headers, [ "Accept-language", "en" ]);
2061 my $auth = &encode_base64("$user:$pass");
2062 $auth =~ tr/\r\n//d;
2063 push(@headers, [ "Authorization", "Basic $auth" ]);
2065 foreach my $hname (keys %$headers) {
2066 push(@headers, [ $hname, $headers->{$hname} ]);
2069 # Actually download it
2070 $main::download_timed_out = undef;
2071 local $SIG{ALRM} = \&download_timeout;
2072 alarm($timeout || 60);
2073 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2075 $h = $main::download_timed_out if ($main::download_timed_out);
2077 if ($error) { $$error = $h; return; }
2078 else { &error($h); }
2080 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2081 $headers, $ssl, $nocache);
2082 if ((!$error || !$$error) && !$nocache) {
2083 &write_to_http_cache($url, $dest);
2087 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2089 Do a HTTP download, after the headers have been sent. For internal use only,
2090 typically called by http_download.
2093 sub complete_http_download
2095 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2101 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2102 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2104 if ($_[2]) { ${$_[2]} = $line; return; }
2105 else { &error("Download failed : $line"); }
2108 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2111 $line = &read_http_connection($_[0]);
2112 $line =~ tr/\r\n//d;
2113 $line =~ /^(\S+):\s+(.*)$/ || last;
2114 $header{lc($1)} = $2;
2115 push(@headers, [ lc($1), $2 ]);
2118 if ($main::download_timed_out) {
2119 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2120 else { &error($main::download_timed_out); }
2122 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2123 if ($rcode >= 300 && $rcode < 400) {
2124 # follow the redirect
2125 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2126 my ($host, $port, $page, $ssl);
2127 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2128 $ssl = $1 eq 'https' ? 1 : 0;
2129 $host = $2; $port = $3; $page = $4 || "/";
2131 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2132 $ssl = $1 eq 'https' ? 1 : 0;
2133 $host = $2; $port = 80; $page = $3 || "/";
2135 elsif ($header{'location'} =~ /^\// && $_[5]) {
2136 # Relative to same server
2140 $page = $header{'location'};
2142 elsif ($header{'location'}) {
2143 # Assume relative to same dir .. not handled
2144 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2145 else { &error("Invalid Location header $header{'location'}"); }
2148 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2149 else { &error("Missing Location header"); }
2152 ($page, $params) = split(/\?/, $page);
2154 $page .= "?".$params if (defined($params));
2155 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2156 undef, undef, undef, $_[4], $_[9], $_[7]);
2161 # Append to a variable
2162 while(defined($buf = &read_http_connection($_[0], 1024))) {
2164 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2170 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2171 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2172 else { &error("Failed to write to $_[1] : $!"); }
2174 binmode(PFILE); # For windows
2175 while(defined($buf = &read_http_connection($_[0], 1024))) {
2176 &print_tempfile(PFILE, $buf);
2177 $got += length($buf);
2178 &$cbfunc(3, $got) if ($cbfunc);
2180 &close_tempfile(PFILE);
2181 if ($header{'content-length'} &&
2182 $got != $header{'content-length'}) {
2183 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2184 else { &error("Download incomplete"); }
2187 &$cbfunc(4) if ($cbfunc);
2189 &close_http_connection($_[0]);
2193 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2195 Download data from an FTP site to a local file. The parameters are :
2197 =item host - FTP server hostname
2199 =item file - File on the FTP server to download
2201 =item destfile - File on the Webmin system to download data to
2203 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2205 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2207 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2209 =item pass - Password for the username above.
2211 =item port - FTP server port number, which defaults to 21 if not set.
2216 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2218 if ($gconfig{'debug_what_net'}) {
2219 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2220 ($user ? " user=$user pass=$pass" : "").
2221 (ref($dest) ? "" : " dest=$dest"));
2225 if (&is_readonly_mode()) {
2226 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2228 else { &error("FTP connections not allowed in readonly mode"); }
2231 # Check if we already have cached the URL
2232 my $url = "ftp://".$host.$file;
2233 my $cfile = &check_in_http_cache($url);
2235 # Yes! Copy to dest file or variable
2236 &$cbfunc(6, $url) if ($cbfunc);
2238 &open_readfile(CACHEFILE, $cfile);
2240 $$dest = <CACHEFILE>;
2244 ©_source_dest($cfile, $dest);
2249 # Actually download it
2250 $main::download_timed_out = undef;
2251 local $SIG{ALRM} = \&download_timeout;
2254 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2255 # download through http-style proxy
2257 if (&open_socket($1, $2, "SOCK", \$error)) {
2259 if ($main::download_timed_out) {
2261 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2262 else { &error($main::download_timed_out); }
2264 my $esc = $_[1]; $esc =~ s/ /%20/g;
2265 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2266 my $portstr = $port == 21 ? "" : ":$port";
2267 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2268 print SOCK "User-agent: Webmin\r\n";
2269 if ($gconfig{'proxy_user'}) {
2270 my $auth = &encode_base64(
2271 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2272 $auth =~ tr/\r\n//d;
2273 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2276 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2279 elsif (!$gconfig{'proxy_fallback'}) {
2281 if ($error) { $$error = $main::download_timed_out; return 0; }
2282 else { &error($main::download_timed_out); }
2287 # connect to host and login with real FTP protocol
2288 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2290 if ($main::download_timed_out) {
2291 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2292 else { &error($main::download_timed_out); }
2294 &ftp_command("", 2, $_[3]) || return 0;
2296 # Login as supplied user
2297 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2299 if (int($urv[1]/100) == 3) {
2300 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2304 # Login as anonymous
2305 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2307 if (int($urv[1]/100) == 3) {
2308 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2312 &$cbfunc(1, 0) if ($cbfunc);
2315 # get the file size and tell the callback
2316 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2317 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2318 defined($size) || return 0;
2320 &$cbfunc(2, int($size));
2324 my $pasv = &ftp_command("PASV", 2, $_[3]);
2325 defined($pasv) || return 0;
2326 $pasv =~ /\(([0-9,]+)\)/;
2327 @n = split(/,/ , $1);
2328 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2329 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2330 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2334 &open_tempfile(PFILE, ">$_[2]", 1);
2335 while(read(CON, $buf, 1024) > 0) {
2336 &print_tempfile(PFILE, $buf);
2337 $got += length($buf);
2338 &$cbfunc(3, $got) if ($cbfunc);
2340 &close_tempfile(PFILE);
2342 if ($got != $size) {
2343 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2344 else { &error("Download incomplete"); }
2346 &$cbfunc(4) if ($cbfunc);
2348 &ftp_command("", 2, $_[3]) || return 0;
2352 &ftp_command("QUIT", 2, $_[3]) || return 0;
2356 &write_to_http_cache($url, $dest);
2360 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2362 Upload data from a local file to an FTP site. The parameters are :
2364 =item host - FTP server hostname
2366 =item file - File on the FTP server to write to
2368 =item srcfile - File on the Webmin system to upload data from
2370 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2372 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2374 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2376 =item pass - Password for the username above.
2378 =item port - FTP server port number, which defaults to 21 if not set.
2385 if (&is_readonly_mode()) {
2386 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2388 else { &error("FTP connections not allowed in readonly mode"); }
2391 $main::download_timed_out = undef;
2392 local $SIG{ALRM} = \&download_timeout;
2395 # connect to host and login
2396 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2398 if ($main::download_timed_out) {
2399 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2400 else { &error($main::download_timed_out); }
2402 &ftp_command("", 2, $_[3]) || return 0;
2404 # Login as supplied user
2405 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2407 if (int($urv[1]/100) == 3) {
2408 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2412 # Login as anonymous
2413 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2415 if (int($urv[1]/100) == 3) {
2416 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2420 &$cbfunc(1, 0) if ($cbfunc);
2422 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2424 # get the file size and tell the callback
2425 my @st = stat($_[2]);
2427 &$cbfunc(2, $st[7]);
2431 my $pasv = &ftp_command("PASV", 2, $_[3]);
2432 defined($pasv) || return 0;
2433 $pasv =~ /\(([0-9,]+)\)/;
2434 @n = split(/,/ , $1);
2435 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2436 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2441 while(read(PFILE, $buf, 1024) > 0) {
2443 $got += length($buf);
2444 &$cbfunc(3, $got) if ($cbfunc);
2448 if ($got != $st[7]) {
2449 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2450 else { &error("Upload incomplete"); }
2452 &$cbfunc(4) if ($cbfunc);
2455 &ftp_command("", 2, $_[3]) || return 0;
2456 &ftp_command("QUIT", 2, $_[3]) || return 0;
2462 =head2 no_proxy(host)
2464 Checks if some host is on the no proxy list. For internal use by the
2465 http_download and ftp_download functions.
2470 my $ip = &to_ipaddress($_[0]);
2471 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2472 return 1 if ($_[0] =~ /\Q$n\E/ ||
2478 =head2 open_socket(host, port, handle, [&error])
2480 Open a TCP connection to some host and port, using a file handle. The
2483 =item host - Hostname or IP address to connect to.
2485 =item port - TCP port number.
2487 =item handle - A file handle name to use for the connection.
2489 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2494 my ($host, $port, $fh, $err) = @_;
2495 $fh = &callers_package($fh);
2497 if ($gconfig{'debug_what_net'}) {
2498 &webmin_debug_log('TCP', "host=$host port=$port");
2500 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2501 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2502 else { &error("Failed to create socket : $!"); }
2505 if (!($addr = inet_aton($host))) {
2506 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2507 else { &error("Failed to lookup IP address for $host"); }
2509 if ($gconfig{'bind_proxy'}) {
2510 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2511 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2512 else { &error("Failed to bind to source address : $!"); }
2515 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2516 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2517 else { &error("Failed to connect to $host:$port : $!"); }
2519 my $old = select($fh); $| =1; select($old);
2523 =head2 download_timeout
2525 Called when a download times out. For internal use only.
2528 sub download_timeout
2530 $main::download_timed_out = "Download timed out";
2533 =head2 ftp_command(command, expected, [&error], [filehandle])
2535 Send an FTP command, and die if the reply is not what was expected. Mainly
2536 for internal use by the ftp_download and ftp_upload functions.
2541 my ($cmd, $expect, $err, $fh) = @_;
2543 $fh = &callers_package($fh);
2546 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2548 print $fh "$cmd\r\n";
2551 if (!($line = <$fh>)) {
2553 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2554 else { &error("Failed to read reply to $what"); }
2556 $line =~ /^(...)(.)(.*)$/;
2559 foreach my $c (@$expect) {
2560 $found++ if (int($1/100) == $c);
2564 $found++ if (int($1/100) == $_[1]);
2568 if ($err) { $$err = "$what failed : $3"; return undef; }
2569 else { &error("$what failed : $3"); }
2574 # Need to skip extra stuff..
2576 if (!($line = <$fh>)) {
2578 if ($$err) { $$err = "Failed to read reply to $what";
2580 else { &error("Failed to read reply to $what"); }
2582 $line =~ /^(....)(.*)$/; $reply .= $2;
2583 if ($1 eq "$rcode ") { last; }
2587 return wantarray ? ($reply, $rcode) : $reply;
2590 =head2 to_ipaddress(hostname)
2592 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2593 it cannot be resolved.
2598 if (&check_ipaddress($_[0])) {
2602 my $hn = gethostbyname($_[0]);
2603 return undef if (!$hn);
2604 local @ip = unpack("CCCC", $hn);
2605 return join("." , @ip);
2609 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2611 Renders a 4-column table of icons. The useful parameters are :
2613 =item links - An array ref of link destination URLs for the icons.
2615 =item titles - An array ref of titles to appear under the icons.
2617 =item icons - An array ref of URLs for icon images.
2619 =item columns - Number of columns to layout the icons with. Defaults to 4.
2624 &load_theme_library();
2625 if (defined(&theme_icons_table)) {
2626 &theme_icons_table(@_);
2630 my $cols = $_[3] ? $_[3] : 4;
2631 my $per = int(100.0 / $cols);
2632 print "<table class='icons_table' width=100% cellpadding=5>\n";
2633 for(my $i=0; $i<@{$_[0]}; $i++) {
2634 if ($i%$cols == 0) { print "<tr>\n"; }
2635 print "<td width=$per% align=center valign=top>\n";
2636 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2637 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2638 $_[7]->[$i], $_[8]->[$i]);
2640 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2642 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2643 print "</tr>\n" if ($need_tr);
2647 =head2 replace_file_line(file, line, [newline]*)
2649 Replaces one line in some file with 0 or more new lines. The parameters are :
2651 =item file - Full path to some file, like /etc/hosts.
2653 =item line - Line number to replace, starting from 0.
2655 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2658 sub replace_file_line
2661 my $realfile = &translate_filename($_[0]);
2662 open(FILE, $realfile);
2665 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2666 else { splice(@lines, $_[1], 1); }
2667 &open_tempfile(FILE, ">$realfile");
2668 &print_tempfile(FILE, @lines);
2669 &close_tempfile(FILE);
2672 =head2 read_file_lines(file, [readonly])
2674 Returns a reference to an array containing the lines from some file. This
2675 array can be modified, and will be written out when flush_file_lines()
2676 is called. The parameters are :
2678 =item file - Full path to the file to read.
2680 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2684 $lref = read_file_lines("/etc/hosts");
2685 push(@$lref, "127.0.0.1 localhost");
2686 flush_file_lines("/etc/hosts");
2692 my ($package, $filename, $line) = caller;
2693 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2695 my $realfile = &translate_filename($_[0]);
2696 if (!$main::file_cache{$realfile}) {
2699 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2700 open(READFILE, $realfile);
2703 $eol = /\r\n$/ ? "\r\n" : "\n";
2709 $main::file_cache{$realfile} = \@lines;
2710 $main::file_cache_noflush{$realfile} = $_[1];
2711 $main::file_cache_eol{$realfile} = $eol || "\n";
2714 # Make read-write if currently readonly
2716 $main::file_cache_noflush{$realfile} = 0;
2719 return $main::file_cache{$realfile};
2722 =head2 flush_file_lines([file], [eol])
2724 Write out to a file previously read by read_file_lines to disk (except
2725 for those marked readonly). The parameters are :
2727 =item file - The file to flush out.
2729 =item eof - End-of-line character for each line. Defaults to \n.
2732 sub flush_file_lines
2736 local $trans = &translate_filename($_[0]);
2737 $main::file_cache{$trans} ||
2738 &error("flush_file_lines called on non-loaded file $trans");
2739 push(@files, $trans);
2742 @files = ( keys %main::file_cache );
2744 foreach my $f (@files) {
2745 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2746 if (!$main::file_cache_noflush{$f}) {
2747 no warnings; # XXX Bareword file handles should go away
2748 &open_tempfile(FLUSHFILE, ">$f");
2749 foreach my $line (@{$main::file_cache{$f}}) {
2750 (print FLUSHFILE $line,$eol) ||
2751 &error(&text("efilewrite", $f, $!));
2753 &close_tempfile(FLUSHFILE);
2755 delete($main::file_cache{$f});
2756 delete($main::file_cache_noflush{$f});
2760 =head2 unflush_file_lines(file)
2762 Clear the internal cache of some given file, previously read by read_file_lines.
2765 sub unflush_file_lines
2767 my $realfile = &translate_filename($_[0]);
2768 delete($main::file_cache{$realfile});
2769 delete($main::file_cache_noflush{$realfile});
2772 =head2 unix_user_input(fieldname, user, [form])
2774 Returns HTML for an input to select a Unix user. By default this is a text
2775 box with a user popup button next to it.
2780 if (defined(&theme_unix_user_input)) {
2781 return &theme_unix_user_input(@_);
2783 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2784 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2787 =head2 unix_group_input(fieldname, user, [form])
2789 Returns HTML for an input to select a Unix group. By default this is a text
2790 box with a group popup button next to it.
2793 sub unix_group_input
2795 if (defined(&theme_unix_group_input)) {
2796 return &theme_unix_group_input(@_);
2798 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2799 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2802 =head2 hlink(text, page, [module], [width], [height])
2804 Returns HTML for a link that when clicked on pops up a window for a Webmin
2805 help page. The parameters are :
2807 =item text - Text for the link.
2809 =item page - Help page code, such as 'intro'.
2811 =item module - Module the help page is in. Defaults to the current module.
2813 =item width - Width of the help popup window. Defaults to 600 pixels.
2815 =item height - Height of the help popup window. Defaults to 400 pixels.
2817 The actual help pages are in each module's help sub-directory, in files with
2823 if (defined(&theme_hlink)) {
2824 return &theme_hlink(@_);
2826 my $mod = $_[2] ? $_[2] : &get_module_name();
2827 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2828 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2829 return "<a onClick='window.open(\"$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>";
2832 =head2 user_chooser_button(field, multiple, [form])
2834 Returns HTML for a javascript button for choosing a Unix user or users.
2835 The parameters are :
2837 =item field - Name of the HTML field to place the username into.
2839 =item multiple - Set to 1 if multiple users can be selected.
2841 =item form - Index of the form on the page.
2844 sub user_chooser_button
2846 return undef if (!&supports_users());
2847 return &theme_user_chooser_button(@_)
2848 if (defined(&theme_user_chooser_button));
2849 my $form = defined($_[2]) ? $_[2] : 0;
2850 my $w = $_[1] ? 500 : 300;
2852 if ($_[1] && $gconfig{'db_sizeusers'}) {
2853 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2855 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2856 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2858 return "<input type=button onClick='ifield = form.$_[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";
2861 =head2 group_chooser_button(field, multiple, [form])
2863 Returns HTML for a javascript button for choosing a Unix group or groups
2864 The parameters are :
2866 =item field - Name of the HTML field to place the group name into.
2868 =item multiple - Set to 1 if multiple groups can be selected.
2870 =item form - Index of the form on the page.
2873 sub group_chooser_button
2875 return undef if (!&supports_users());
2876 return &theme_group_chooser_button(@_)
2877 if (defined(&theme_group_chooser_button));
2878 my $form = defined($_[2]) ? $_[2] : 0;
2879 my $w = $_[1] ? 500 : 300;
2881 if ($_[1] && $gconfig{'db_sizeusers'}) {
2882 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2884 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2885 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2887 return "<input type=button onClick='ifield = form.$_[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";
2890 =head2 foreign_check(module, [api-only])
2892 Checks if some other module exists and is supported on this OS. The parameters
2895 =item module - Name of the module to check.
2897 =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.
2902 my ($mod, $api) = @_;
2904 my $mdir = &module_root_directory($mod);
2905 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2906 return &check_os_support(\%minfo, undef, undef, $api);
2909 =head2 foreign_exists(module)
2911 Checks if some other module exists. The module parameter is the short module
2917 my $mdir = &module_root_directory($_[0]);
2918 return -r "$mdir/module.info";
2921 =head2 foreign_available(module)
2923 Returns 1 if some module is installed, and acessible to the current user. The
2924 module parameter is the module directory name.
2927 sub foreign_available
2929 return 0 if (!&foreign_check($_[0]) &&
2930 !$gconfig{'available_even_if_no_support'});
2931 my %foreign_module_info = &get_module_info($_[0]);
2933 # Check list of allowed modules
2935 &read_acl(\%acl, undef);
2936 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2937 !$acl{$base_remote_user,'*'});
2939 # Check for usermod restrictions
2940 my @usermods = &list_usermods();
2941 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2943 if (&get_product_name() eq "webmin") {
2944 # Check if the user has any RBAC privileges in this module
2945 if (&supports_rbac($_[0]) &&
2946 &use_rbac_module_acl(undef, $_[0])) {
2947 # RBAC is enabled for this user and module - check if he
2949 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2950 return 0 if (!$rbacs);
2952 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2953 # If denying access to modules not specifically allowed by
2954 # RBAC, then prevent access
2959 # Check readonly support
2960 if (&is_readonly_mode()) {
2961 return 0 if (!$foreign_module_info{'readonly'});
2964 # Check if theme vetos
2965 if (defined(&theme_foreign_available)) {
2966 return 0 if (!&theme_foreign_available($_[0]));
2969 # Check if licence module vetos
2970 if ($main::licence_module) {
2971 return 0 if (!&foreign_call($main::licence_module,
2972 "check_module_licence", $_[0]));
2978 =head2 foreign_require(module, [file], [package])
2980 Brings in functions from another module, and places them in the Perl namespace
2981 with the same name as the module. The parameters are :
2983 =item module - The source module's directory name, like sendmail.
2985 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2987 =item package - Perl package to place the module's functions and global variables in.
2989 If the original module name contains dashes, they will be replaced with _ in
2995 my ($mod, $file, $pkg) = @_;
2996 $pkg ||= $mod || "global";
2997 $pkg =~ s/[^A-Za-z0-9]/_/g;
3000 push(@files, $file);
3004 my %minfo = &get_module_info($mod);
3005 if ($minfo{'library'}) {
3006 @files = split(/\s+/, $minfo{'library'});
3009 @files = ( $mod."-lib.pl" );
3012 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3013 return 1 if (!@files);
3014 foreach my $f (@files) {
3015 $main::done_foreign_require{$pkg,$f}++;
3018 my $mdir = &module_root_directory($mod);
3019 @INC = &unique($mdir, @INC);
3020 -d $mdir || &error("Module $mod does not exist");
3021 if (!&get_module_name() && $mod) {
3024 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3025 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3026 my $code = "package $pkg; ".
3027 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3028 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3029 foreach my $f (@files) {
3030 $code .= "do '$mdir/$f' || die \$@; ";
3033 if (defined($old_fmn)) {
3034 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3037 delete($ENV{'FOREIGN_MODULE_NAME'});
3039 if (defined($old_frd)) {
3040 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3043 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3046 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3050 =head2 foreign_call(module, function, [arg]*)
3052 Call a function in another module. The module parameter is the target module
3053 directory name, function is the perl sub to call, and the remaining parameters
3054 are the arguments. However, unless you need to call a function whose name
3055 is dynamic, it is better to use Perl's cross-module function call syntax
3056 like module::function(args).
3061 my $pkg = $_[0] || "global";
3062 $pkg =~ s/[^A-Za-z0-9]/_/g;
3063 my @args = @_[2 .. @_-1];
3064 $main::foreign_args = \@args;
3065 my @rv = eval <<EOF;
3067 &$_[1](\@{\$main::foreign_args});
3069 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3070 return wantarray ? @rv : $rv[0];
3073 =head2 foreign_config(module, [user-config])
3075 Get the configuration from another module, and return it as a hash. If the
3076 user-config parameter is set to 1, returns the Usermin user-level preferences
3077 for the current user instead.
3082 my ($mod, $uc) = @_;
3085 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3086 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3087 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3090 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3095 =head2 foreign_installed(module, mode)
3097 Checks if the server for some module is installed, and possibly also checks
3098 if the module has been configured by Webmin.
3099 For mode 1, returns 2 if the server is installed and configured for use by
3100 Webmin, 1 if installed but not configured, or 0 otherwise.
3101 For mode 0, returns 1 if installed, 0 if not.
3102 If the module does not provide an install_check.pl script, assumes that
3103 the server is installed.
3106 sub foreign_installed
3108 my ($mod, $configured) = @_;
3109 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3111 return $main::foreign_installed_cache{$mod,$configured};
3115 if (!&foreign_check($mod)) {
3120 my $mdir = &module_root_directory($mod);
3121 if (!-r "$mdir/install_check.pl") {
3122 # Not known, assume OK
3123 $rv = $configured ? 2 : 1;
3126 # Call function to check
3127 &foreign_require($mod, "install_check.pl");
3128 $rv = &foreign_call($mod, "is_installed", $configured);
3131 $main::foreign_installed_cache{$mod,$configured} = $rv;
3136 =head2 foreign_defined(module, function)
3138 Returns 1 if some function is defined in another module. In general, it is
3139 simpler to use the syntax &defined(module::function) instead.
3145 $pkg =~ s/[^A-Za-z0-9]/_/g;
3146 my $func = "${pkg}::$_[1]";
3147 return defined(&$func);
3150 =head2 get_system_hostname([short])
3152 Returns the hostname of this system. If the short parameter is set to 1,
3153 then the domain name is not prepended - otherwise, Webmin will attempt to get
3154 the fully qualified hostname, like foo.example.com.
3157 sub get_system_hostname
3160 if (!$main::get_system_hostname[$m]) {
3161 if ($gconfig{'os_type'} ne 'windows') {
3162 # Try some common Linux hostname files first
3164 if ($gconfig{'os_type'} eq 'redhat-linux') {
3166 &read_env_file("/etc/sysconfig/network", \%nc);
3167 if ($nc{'HOSTNAME'}) {
3168 $fromfile = $nc{'HOSTNAME'};
3171 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3172 my $hn = &read_file_contents("/etc/hostname");
3178 elsif ($gconfig{'os_type'} eq 'open-linux') {
3179 my $hn = &read_file_contents("/etc/HOSTNAME");
3185 elsif ($gconfig{'os_type'} eq 'solaris') {
3186 my $hn = &read_file_contents("/etc/nodename");
3193 # If we found a hostname, use it if value
3194 if ($fromfile && ($m || $fromfile =~ /\./)) {
3196 $fromfile =~ s/\..*$//;
3198 $main::get_system_hostname[$m] = $fromfile;
3202 # Can use hostname command on Unix
3203 &execute_command("hostname", undef,
3204 \$main::get_system_hostname[$m], undef, 0, 1);
3205 chop($main::get_system_hostname[$m]);
3207 eval "use Sys::Hostname";
3209 $main::get_system_hostname[$m] = eval "hostname()";
3211 if ($@ || !$main::get_system_hostname[$m]) {
3212 $main::get_system_hostname[$m] = "UNKNOWN";
3215 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3216 $gconfig{'os_type'} =~ /linux$/ &&
3217 !$gconfig{'no_hostname_f'} && !$_[0]) {
3218 # Try with -f flag to get fully qualified name
3220 my $ex = &execute_command("hostname -f", undef, \$flag,
3223 if ($ex || $flag eq "") {
3224 # -f not supported! We have probably set the
3225 # hostname to just '-f'. Fix the problem
3228 &execute_command("hostname ".
3229 quotemeta($main::get_system_hostname[$m]),
3230 undef, undef, undef, 0, 1);
3234 $main::get_system_hostname[$m] = $flag;
3239 # On Windows, try computername environment variable
3240 return $ENV{'computername'} if ($ENV{'computername'});
3241 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3243 # Fall back to net name command
3244 my $out = `net name 2>&1`;
3245 if ($out =~ /\-+\r?\n(\S+)/) {
3246 $main::get_system_hostname[$m] = $1;
3249 $main::get_system_hostname[$m] = "windows";
3253 return $main::get_system_hostname[$m];
3256 =head2 get_webmin_version
3258 Returns the version of Webmin currently being run, such as 1.450.
3261 sub get_webmin_version
3263 if (!$get_webmin_version) {
3264 open(VERSION, "$root_directory/version") || return 0;
3265 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3268 return $get_webmin_version;
3271 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3273 Returns a hash containing access control options for the given user and module.
3274 By default the current username and module name are used. If the no-rbac flag
3275 is given, the permissions will not be updated based on the user's RBAC role
3276 (as seen on Solaris). If the no-default flag is given, default permissions for
3277 the module will not be included.
3282 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3283 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3284 my $mdir = &module_root_directory($m);
3287 # Read default ACL first, to be overridden by per-user settings
3288 &read_file_cached("$mdir/defaultacl", \%rv);
3290 # If this isn't a master admin user, apply the negative permissions
3291 # so that he doesn't un-expectedly gain access to new features
3293 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3294 if ($gaccess{'negative'}) {
3295 &read_file_cached("$mdir/negativeacl", \%rv);
3299 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3300 # RBAC overrides exist for this user in this module
3301 my $rbac = &get_rbac_module_acl(
3302 defined($_[0]) ? $_[0] : $remote_user, $m);
3303 foreach my $r (keys %$rbac) {
3304 $rv{$r} = $rbac->{$r};
3307 elsif ($gconfig{"risk_$u"} && $m) {
3308 # ACL is defined by user's risk level
3309 my $rf = $gconfig{"risk_$u"}.'.risk';
3310 &read_file_cached("$mdir/$rf", \%rv);
3312 my $sf = $gconfig{"skill_$u"}.'.skill';
3313 &read_file_cached("$mdir/$sf", \%rv);
3316 # Use normal Webmin ACL, if a user is set
3318 &get_miniserv_config(\%miniserv);
3319 if ($miniserv{'userdb'}) {
3320 # Look for this user in the user/group DB
3323 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3324 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3325 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3328 if ($tconfig{'preload_functions'}) {
3329 &load_theme_library();
3331 if (defined(&theme_get_module_acl)) {
3332 %rv = &theme_get_module_acl($u, $m, \%rv);
3337 =head2 get_group_module_acl(group, [module])
3339 Returns the ACL for a Webmin group, in an optional module (which defaults to
3340 the current module).
3343 sub get_group_module_acl
3346 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3347 my $mdir = &module_root_directory($m);
3349 &read_file_cached("$mdir/defaultacl", \%rv);
3350 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3351 if (defined(&theme_get_module_acl)) {
3352 %rv = &theme_get_module_acl($g, $m, \%rv);
3357 =head2 save_module_acl(&acl, [user], [module])
3359 Updates the acl hash for some user and module. The parameters are :
3361 =item acl - Hash reference for the new access control options.
3363 =item user - User to update, defaulting to the current user.
3365 =item module - Module to update, defaulting to the caller.
3370 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3371 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3372 if (&foreign_check("acl")) {
3373 # Check if this user is a member of a group, and if he gets the
3374 # module from a group. If so, update its ACL as well
3375 &foreign_require("acl", "acl-lib.pl");
3377 foreach my $g (&acl::list_groups()) {
3378 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3379 &indexof($m, @{$g->{'modules'}}) >= 0) {
3385 &save_group_module_acl($_[0], $group->{'name'}, $m);
3388 if (!-d "$config_directory/$m") {
3389 mkdir("$config_directory/$m", 0755);
3391 &write_file("$config_directory/$m/$u.acl", $_[0]);
3394 =head2 save_group_module_acl(&acl, group, [module])
3396 Updates the acl hash for some group and module. The parameters are :
3398 =item acl - Hash reference for the new access control options.
3400 =item group - Group name to update.
3402 =item module - Module to update, defaulting to the caller.
3405 sub save_group_module_acl
3408 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3409 if (&foreign_check("acl")) {
3410 # Check if this group is a member of a group, and if it gets the
3411 # module from a group. If so, update the parent ACL as well
3412 &foreign_require("acl", "acl-lib.pl");
3414 foreach my $pg (&acl::list_groups()) {
3415 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3416 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3422 &save_group_module_acl($_[0], $group->{'name'}, $m);
3425 if (!-d "$config_directory/$m") {
3426 mkdir("$config_directory/$m", 0755);
3428 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3433 This function must be called by all Webmin CGI scripts, either directly or
3434 indirectly via a per-module lib.pl file. It performs a number of initialization
3435 and housekeeping tasks, such as working out the module name, checking that the
3436 current user has access to the module, and populating global variables. Some
3437 of the variables set include :
3439 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3441 =item $var_directory - Base logs directory, typically /var/webmin
3443 =item %config - Per-module configuration.
3445 =item %gconfig - Global configuration.
3447 =item $scriptname - Base name of the current perl script.
3449 =item $module_name - The name of the current module.
3451 =item $module_config_directory - The config directory for this module.
3453 =item $module_config_file - The config file for this module.
3455 =item $module_root_directory - This module's code directory.
3457 =item $webmin_logfile - The detailed logfile for webmin.
3459 =item $remote_user - The actual username used to login to webmin.
3461 =item $base_remote_user - The username whose permissions are in effect.
3463 =item $current_theme - The theme currently in use.
3465 =item $root_directory - The first root directory of this webmin install.
3467 =item @root_directories - All root directories for this webmin install.
3472 # Record first process ID that called this, so we know when it exited to clean
3474 $main::initial_process_id ||= $$;
3476 # Configuration and spool directories
3477 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3478 die "WEBMIN_CONFIG not set";
3480 $config_directory = $ENV{'WEBMIN_CONFIG'};
3481 if (!defined($ENV{'WEBMIN_VAR'})) {
3482 open(VARPATH, "$config_directory/var-path");
3483 chop($var_directory = <VARPATH>);
3487 $var_directory = $ENV{'WEBMIN_VAR'};
3489 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3490 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3492 if ($ENV{'SESSION_ID'}) {
3493 # Hide this variable from called programs, but keep it for internal use
3494 $main::session_id = $ENV{'SESSION_ID'};
3495 delete($ENV{'SESSION_ID'});
3497 if ($ENV{'REMOTE_PASS'}) {
3498 # Hide the password too
3499 $main::remote_pass = $ENV{'REMOTE_PASS'};
3500 delete($ENV{'REMOTE_PASS'});
3503 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3504 # Looks like we are running setuid, but the real UID hasn't been set.
3505 # Do so now, so that executed programs don't get confused
3510 # Read the webmin global config file. This contains the OS type and version,
3511 # OS specific configuration and global options such as proxy servers
3512 $config_file = "$config_directory/config";
3514 &read_file_cached($config_file, \%gconfig);
3515 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3516 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3518 # If debugging is enabled, open the debug log
3519 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3520 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3521 if ($gconfig{'debug_size'}) {
3522 my @st = stat($dlog);
3523 if ($st[7] > $gconfig{'debug_size'}) {
3524 rename($dlog, $dlog.".0");
3527 open(main::DEBUGLOG, ">>$dlog");
3528 $main::opened_debug_log = 1;
3530 if ($gconfig{'debug_what_start'}) {
3531 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3532 $main::debug_log_start_time = time();
3533 &webmin_debug_log("START", "script=$script_name");
3534 $main::debug_log_start_module = $module_name;
3538 # Set PATH and LD_LIBRARY_PATH
3539 if ($gconfig{'path'}) {
3540 if ($gconfig{'syspath'}) {
3542 $ENV{'PATH'} = $gconfig{'path'};
3546 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3549 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3551 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3552 if ($gconfig{'http_proxy'}) {
3553 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3555 if ($gconfig{'ftp_proxy'}) {
3556 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3558 if ($gconfig{'noproxy'}) {
3559 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3562 # Find all root directories
3564 if (&get_miniserv_config(\%miniserv)) {
3565 @root_directories = ( $miniserv{'root'} );
3566 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3567 push(@root_directories, $miniserv{"extraroot_$i"});
3571 # Work out which module we are in, and read the per-module config file
3572 $0 =~ s/\\/\//g; # Force consistent path on Windows
3573 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3574 # In a foreign call - use the module name given
3575 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3576 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3577 @root_directories = ( $root_directory ) if (!@root_directories);
3579 elsif ($ENV{'SCRIPT_NAME'}) {
3580 my $sn = $ENV{'SCRIPT_NAME'};
3581 $sn =~ s/^$gconfig{'webprefix'}//
3582 if (!$gconfig{'webprefixnoredir'});
3583 if ($sn =~ /^\/([^\/]+)\//) {
3584 # Get module name from CGI path
3587 if ($ENV{'SERVER_ROOT'}) {
3588 $root_directory = $ENV{'SERVER_ROOT'};
3590 elsif ($ENV{'SCRIPT_FILENAME'}) {
3591 $root_directory = $ENV{'SCRIPT_FILENAME'};
3592 $root_directory =~ s/$sn$//;
3594 @root_directories = ( $root_directory ) if (!@root_directories);
3597 # Get root directory from miniserv.conf, and deduce module name from $0
3598 $root_directory = $root_directories[0];
3600 foreach my $r (@root_directories) {
3601 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3602 # Under a module directory
3607 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3613 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3616 # Work out of this is a web, command line or cron job
3617 if (!$main::webmin_script_type) {
3618 if ($ENV{'SCRIPT_NAME'}) {
3620 $main::webmin_script_type = 'web';
3623 # Cron jobs have no TTY
3624 if ($gconfig{'os_type'} eq 'windows' ||
3625 open(DEVTTY, ">/dev/tty")) {
3626 $main::webmin_script_type = 'cmd';
3630 $main::webmin_script_type = 'cron';
3635 # Set the umask based on config
3636 if ($gconfig{'umask'} && !$main::umask_already++) {
3637 umask(oct($gconfig{'umask'}));
3640 # If this is a cron job or other background task, set the nice level
3641 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3643 if ($gconfig{'nice'}) {
3644 eval 'POSIX::nice($gconfig{\'nice\'});';
3647 # Set IO scheduling class and priority
3648 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3650 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3651 if ($gconfig{'sclass'} ne '');
3652 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3653 if ($gconfig{'sprio'} ne '');
3655 &execute_command("$cmd >/dev/null 2>&1");
3658 $main::nice_already++;
3661 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3662 $base_remote_user = $u;
3663 $remote_user = $ENV{'REMOTE_USER'};
3666 # Find and load the configuration file for this module
3667 my (@ruinfo, $rgroup);
3668 $module_config_directory = "$config_directory/$module_name";
3669 if (&get_product_name() eq "usermin" &&
3670 -r "$module_config_directory/config.$remote_user") {
3672 $module_config_file = "$module_config_directory/config.$remote_user";
3674 elsif (&get_product_name() eq "usermin" &&
3675 (@ruinfo = getpwnam($remote_user)) &&
3676 ($rgroup = getgrgid($ruinfo[3])) &&
3677 -r "$module_config_directory/config.\@$rgroup") {
3678 # Based on group name
3679 $module_config_file = "$module_config_directory/config.\@$rgroup";
3683 $module_config_file = "$module_config_directory/config";
3686 &read_file_cached($module_config_file, \%config);
3688 # Fix up windows-specific substitutions in values
3689 foreach my $k (keys %config) {
3690 if ($config{$k} =~ /\$\{systemroot\}/) {
3691 my $root = &get_windows_root();
3692 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3697 # Record the initial module
3698 $main::initial_module_name ||= $module_name;
3700 # Set some useful variables
3702 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3703 $gconfig{'mobile_theme'} :
3704 defined($gconfig{'theme_'.$remote_user}) ?
3705 $gconfig{'theme_'.$remote_user} :
3706 defined($gconfig{'theme_'.$base_remote_user}) ?
3707 $gconfig{'theme_'.$base_remote_user} :
3709 @current_themes = split(/\s+/, $current_themes);
3710 $current_theme = $current_themes[0];
3711 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3712 $theme_root_directory = $theme_root_directories[0];
3713 @theme_configs = ( );
3714 foreach my $troot (@theme_root_directories) {
3716 &read_file_cached("$troot/config", \%onetconfig);
3717 &read_file_cached("$troot/config", \%tconfig);
3718 push(@theme_configs, \%onetconfig);
3720 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3721 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3723 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3724 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3726 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3727 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3728 if ($tconfig{'preload_functions'}) {
3729 # Force load of theme functions right now, if requested
3730 &load_theme_library();
3732 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3733 # Load the theme's Webmin:: package classes
3734 do "$theme_root_directory/$tconfig{'oofunctions'}";
3739 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3740 : "$var_directory/webmin.log";
3742 # Load language strings into %text
3743 my @langs = &list_languages();
3745 if ($gconfig{'acceptlang'}) {
3746 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3747 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3749 $accepted_lang = $al->{'lang'};
3754 $current_lang = $force_lang ? $force_lang :
3755 $accepted_lang ? $accepted_lang :
3756 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3757 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3758 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3759 foreach my $l (@langs) {
3760 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3762 @lang_order_list = &unique($default_lang,
3763 split(/:/, $current_lang_info->{'fallback'}),
3765 %text = &load_language($module_name);
3766 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3768 # Get the %module_info for this module
3770 my ($mi) = grep { $_->{'dir'} eq $module_name }
3771 &get_all_module_infos(2);
3772 %module_info = %$mi;
3773 $module_root_directory = &module_root_directory($module_name);
3776 if ($module_name && !$main::no_acl_check &&
3777 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3778 # Check if the HTTP user can access this module
3779 if (!&foreign_available($module_name)) {
3780 if (!&foreign_check($module_name)) {
3781 &error(&text('emodulecheck',
3782 "<i>$module_info{'desc'}</i>"));
3785 &error(&text('emodule', "<i>$u</i>",
3786 "<i>$module_info{'desc'}</i>"));
3789 $main::no_acl_check++;
3792 # Check the Referer: header for nasty redirects
3793 my @referers = split(/\s+/, $gconfig{'referers'});
3795 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3798 my $http_host = $ENV{'HTTP_HOST'};
3799 $http_host =~ s/:\d+$//;
3800 my $unsafe_index = $unsafe_index_cgi ||
3801 &get_module_variable('$unsafe_index_cgi');
3803 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
3804 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3806 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3807 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3808 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3809 ($referer_site && $referer_site ne $http_host &&
3810 &indexof($referer_site, @referers) < 0 ||
3811 !$referer_site && $gconfig{'referers_none'}) &&
3812 !$trust_unknown_referers &&
3813 !&get_module_variable('$trust_unknown_referers')) {
3814 # Looks like a link from elsewhere .. show an error
3815 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3817 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3818 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3819 if ($referer_site) {
3821 print &text('referer_warn',
3822 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3824 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3825 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3828 # No referer info given
3829 print &text('referer_warn_unknown', $url),"<p>\n";
3830 print &text('referer_fix1u'),"<p>\n";
3831 print &text('referer_fix2u'),"<p>\n";
3835 &footer("/", $text{'index'});
3838 $main::no_referers_check++;
3839 $main::completed_referers_check++;
3841 # Call theme post-init
3842 if (defined(&theme_post_init_config)) {
3843 &theme_post_init_config(@_);
3846 # Record that we have done the calling library in this package
3847 my ($callpkg, $lib) = caller();
3849 $main::done_foreign_require{$callpkg,$lib} = 1;
3851 # If a licence checking is enabled, do it now
3852 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3853 &foreign_check($gconfig{'licence_module'}) &&
3854 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3855 my $oldpwd = &get_current_dir();
3856 $main::done_licence_module_check++;
3857 $main::licence_module = $gconfig{'licence_module'};
3858 &foreign_require($main::licence_module, "licence_check.pl");
3859 ($main::licence_status, $main::licence_message) =
3860 &foreign_call($main::licence_module, "check_licence");
3864 # Export global variables to caller
3865 if ($main::export_to_caller) {
3866 foreach my $v ('$config_file', '%gconfig', '$null_file',
3867 '$path_separator', '@root_directories',
3868 '$root_directory', '$module_name',
3869 '$base_remote_user', '$remote_user',
3870 '$module_config_directory', '$module_config_file',
3871 '%config', '@current_themes', '$current_theme',
3872 '@theme_root_directories', '$theme_root_directory',
3873 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3874 '$webmin_logfile', '$current_lang',
3875 '$current_lang_info', '@lang_order_list', '%text',
3876 '%module_info', '$module_root_directory') {
3877 my ($vt, $vn) = split('', $v, 2);
3878 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3885 =head2 load_language([module], [directory])
3887 Returns a hashtable mapping text codes to strings in the appropriate language,
3888 based on the $current_lang global variable, which is in turn set based on
3889 the Webmin user's selection. The optional module parameter tells the function
3890 which module to load strings for, and defaults to the calling module. The
3891 optional directory parameter can be used to load strings from a directory
3894 In regular module development you will never need to call this function
3895 directly, as init_config calls it for you, and places the module's strings
3896 into the %text hash.
3902 my $root = $root_directory;
3903 my $ol = $gconfig{'overlang'};
3904 my ($dir) = ($_[1] || "lang");
3906 # Read global lang files
3907 foreach my $o (@lang_order_list) {
3908 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3909 return () if (!$ok && $o eq $default_lang);
3912 foreach my $o (@lang_order_list) {
3913 &read_file_cached("$root/$ol/$o", \%text);
3916 &read_file_cached("$config_directory/custom-lang", \%text);
3919 # Read module's lang files
3920 my $mdir = &module_root_directory($_[0]);
3921 foreach my $o (@lang_order_list) {
3922 &read_file_cached("$mdir/$dir/$o", \%text);
3925 foreach $o (@lang_order_list) {
3926 &read_file_cached("$mdir/$ol/$o", \%text);
3929 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3931 foreach $k (keys %text) {
3932 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3935 if (defined(&theme_load_language)) {
3936 &theme_load_language(\%text, $_[0]);
3941 =head2 text_subs(string)
3943 Used internally by load_language to expand $code substitutions in language
3949 if (substr($_[0], 0, 8) eq "include:") {
3952 open(INCLUDE, substr($_[0], 8));
3960 my $t = $_[1]->{$_[0]};
3961 return defined($t) ? $t : '$'.$_[0];
3965 =head2 text(message, [substitute]+)
3967 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3968 the substitute parameters. This makes it easy to use strings with placeholders
3969 that get replaced with programmatically generated text. For example :
3971 print &text('index_hello', $remote_user),"<p>\n";
3976 my $t = &get_module_variable('%text', 1);
3977 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3978 for(my $i=1; $i<@_; $i++) {
3979 $rv =~ s/\$$i/$_[$i]/g;
3984 =head2 encode_base64(string)
3986 Encodes a string into base64 format, for use in MIME email or HTTP
3987 authorization headers.
3993 pos($_[0]) = 0; # ensure start at the beginning
3994 while ($_[0] =~ /(.{1,57})/gs) {
3995 $res .= substr(pack('u57', $1), 1)."\n";
3998 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3999 my $padding = (3 - length($_[0]) % 3) % 3;
4000 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4004 =head2 decode_base64(string)
4006 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4013 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4014 if (length($str) % 4) {
4017 $str =~ s/=+$//; # remove padding
4018 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4019 while ($str =~ /(.{1,60})/gs) {
4020 my $len = chr(32 + length($1)*3/4); # compute length byte
4021 $res .= unpack("u", $len . $1 ); # uudecode
4026 =head2 get_module_info(module, [noclone], [forcache])
4028 Returns a hash containg details of the given module. Some useful keys are :
4030 =item dir - The module directory, like sendmail.
4032 =item desc - Human-readable description, in the current users' language.
4034 =item version - Optional module version number.
4036 =item os_support - List of supported operating systems and versions.
4038 =item category - Category on Webmin's left menu, like net.
4043 return () if ($_[0] =~ /^\./);
4044 my (%rv, $clone, $o);
4045 my $mdir = &module_root_directory($_[0]);
4046 &read_file_cached("$mdir/module.info", \%rv) || return ();
4048 foreach $o (@lang_order_list) {
4049 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4050 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4052 if ($clone && !$_[1] && $config_directory) {
4053 $rv{'clone'} = $rv{'desc'};
4054 &read_file("$config_directory/$_[0]/clone", \%rv);
4057 my %module_categories;
4058 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4059 my $pn = &get_product_name();
4060 if (defined($rv{'category_'.$pn})) {
4061 # Can override category for webmin/usermin
4062 $rv{'category'} = $rv{'category_'.$pn};
4064 $rv{'realcategory'} = $rv{'category'};
4065 $rv{'category'} = $module_categories{$_[0]}
4066 if (defined($module_categories{$_[0]}));
4068 # Apply description overrides
4069 $rv{'realdesc'} = $rv{'desc'};
4071 &read_file_cached("$config_directory/webmin.descs", \%descs);
4072 if ($descs{$_[0]." ".$current_lang}) {
4073 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4075 elsif ($descs{$_[0]}) {
4076 $rv{'desc'} = $descs{$_[0]};
4080 # Apply per-user description overridde
4081 my %gaccess = &get_module_acl(undef, "");
4082 if ($gaccess{'desc_'.$_[0]}) {
4083 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4087 if ($rv{'longdesc'}) {
4088 # All standard modules have an index.cgi
4089 $rv{'index_link'} = 'index.cgi';
4092 # Call theme-specific override function
4093 if (defined(&theme_get_module_info)) {
4094 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4100 =head2 get_all_module_infos(cachemode)
4102 Returns a list contains the information on all modules in this webmin
4103 install, including clones. Uses caching to reduce the number of module.info
4104 files that need to be read. Each element of the array is a hash reference
4105 in the same format as returned by get_module_info. The cache mode flag can be :
4106 0 = read and write, 1 = don't read or write, 2 = read only
4109 sub get_all_module_infos
4113 # Is the cache out of date? (ie. have any of the root's changed?)
4114 my $cache_file = "$config_directory/module.infos.cache";
4116 if (&read_file_cached($cache_file, \%cache)) {
4117 foreach my $r (@root_directories) {
4119 if ($st[9] != $cache{'mtime_'.$r}) {
4129 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4130 # Can use existing module.info cache
4132 foreach my $k (keys %cache) {
4133 if ($k =~ /^(\S+) (\S+)$/) {
4134 $mods{$1}->{$2} = $cache{$k};
4137 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4140 # Need to rebuild cache
4142 foreach my $r (@root_directories) {
4144 foreach my $m (readdir(DIR)) {
4145 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4146 my %minfo = &get_module_info($m, 0, 1);
4147 next if (!%minfo || !$minfo{'dir'});
4149 foreach $k (keys %minfo) {
4150 $cache{"${m} ${k}"} = $minfo{$k};
4155 $cache{'mtime_'.$r} = $st[9];
4157 $cache{'lang'} = $current_lang;
4158 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4161 # Override descriptions for modules for current user
4162 my %gaccess = &get_module_acl(undef, "");
4163 foreach my $m (@rv) {
4164 if ($gaccess{"desc_".$m->{'dir'}}) {
4165 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4169 # Apply installed flags
4171 &read_file_cached("$config_directory/installed.cache", \%installed);
4172 foreach my $m (@rv) {
4173 $m->{'installed'} = $installed{$m->{'dir'}};
4179 =head2 get_theme_info(theme)
4181 Returns a hash containing a theme's details, taken from it's theme.info file.
4182 Some useful keys are :
4184 =item dir - The theme directory, like blue-theme.
4186 =item desc - Human-readable description, in the current users' language.
4188 =item version - Optional module version number.
4190 =item os_support - List of supported operating systems and versions.
4195 return () if ($_[0] =~ /^\./);
4197 my $tdir = &module_root_directory($_[0]);
4198 &read_file("$tdir/theme.info", \%rv) || return ();
4199 foreach my $o (@lang_order_list) {
4200 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4206 =head2 list_languages
4208 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4209 Each is a hash reference with the following keys :
4211 =item lang - The short language code, like es for Spanish.
4213 =item desc - A human-readable description, in English.
4215 =item charset - An optional character set to use when displaying the language.
4217 =item titles - Set to 1 only if Webmin has title images for the language.
4219 =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.
4224 if (!@main::list_languages_cache) {
4227 open(LANG, "$root_directory/lang_list.txt");
4229 if (/^(\S+)\s+(.*)/) {
4230 my $l = { 'desc' => $2 };
4231 foreach $o (split(/,/, $1)) {
4232 if ($o =~ /^([^=]+)=(.*)$/) {
4236 $l->{'index'} = scalar(@rv);
4237 push(@main::list_languages_cache, $l);
4241 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4242 @main::list_languages_cache;
4244 return @main::list_languages_cache;
4247 =head2 read_env_file(file, &hash)
4249 Similar to Webmin's read_file function, but handles files containing shell
4250 environment variables formatted like :
4255 The file parameter is the full path to the file to read, and hash a Perl hash
4256 ref to read names and values into.
4262 &open_readfile(FILE, $_[0]) || return 0;
4265 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4266 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4267 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4275 =head2 write_env_file(file, &hash, [export])
4277 Writes out a hash to a file in name='value' format, suitable for use in a shell
4278 script. The parameters are :
4280 =item file - Full path for a file to write to
4282 =item hash - Hash reference of names and values to write.
4284 =item export - If set to 1, preceed each variable setting with the word 'export'.
4289 my $exp = $_[2] ? "export " : "";
4290 &open_tempfile(FILE, ">$_[0]");
4291 foreach my $k (keys %{$_[1]}) {
4292 my $v = $_[1]->{$k};
4293 if ($v =~ /^\S+$/) {
4294 &print_tempfile(FILE, "$exp$k=$v\n");
4297 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4300 &close_tempfile(FILE);
4303 =head2 lock_file(filename, [readonly], [forcefile])
4305 Lock a file for exclusive access. If the file is already locked, spin
4306 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4307 to work OK. The parameters are :
4309 =item filename - File or directory to lock.
4311 =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.
4313 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4318 my $realfile = &translate_filename($_[0]);
4319 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4320 my $no_lock = !&can_lock_file($realfile);
4321 my $lock_tries_count = 0;
4324 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4329 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4332 # Create the .lock file
4333 open(LOCKING, ">$realfile.lock") || return 0;
4334 my $lck = eval "flock(LOCKING, 2+4)";
4336 # Lock of lock file failed! Wait till later
4339 print LOCKING $$,"\n";
4340 eval "flock(LOCKING, 8)";
4343 $main::locked_file_list{$realfile} = int($_[1]);
4344 push(@main::temporary_files, "$realfile.lock");
4345 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4346 !&get_module_variable('$no_log_file_changes') &&
4348 # Grab a copy of this file for later diffing
4350 $main::locked_file_data{$realfile} = undef;
4352 $main::locked_file_type{$realfile} = 1;
4353 $main::locked_file_data{$realfile} = '';
4355 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4356 $main::locked_file_type{$realfile} = 2;
4357 $main::locked_file_data{$realfile} = $lnk;
4359 elsif (open(ORIGFILE, $realfile)) {
4360 $main::locked_file_type{$realfile} = 0;
4361 $main::locked_file_data{$realfile} = '';
4364 $main::locked_file_data{$realfile} .=$_;
4373 if ($lock_tries_count++ > 5*60) {
4374 # Give up after 5 minutes
4375 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4381 =head2 unlock_file(filename)
4383 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4384 file changes is enabled, then at unlock file a diff will be taken between the
4385 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4386 called. This can then be viewed in the Webmin Actions Log module.
4391 my $realfile = &translate_filename($_[0]);
4392 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4393 unlink("$realfile.lock") if (&can_lock_file($realfile));
4394 delete($main::locked_file_list{$realfile});
4395 if (exists($main::locked_file_data{$realfile})) {
4396 # Diff the new file with the old
4398 my $lnk = readlink($realfile);
4399 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4400 my $oldtype = $main::locked_file_type{$realfile};
4401 my $new = !defined($main::locked_file_data{$realfile});
4402 if ($new && !-e _) {
4403 # file doesn't exist, and never did! do nothing ..
4405 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4406 # is (or was) a directory ..
4407 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4408 push(@main::locked_file_diff,
4409 { 'type' => 'mkdir', 'object' => $realfile });
4411 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4412 push(@main::locked_file_diff,
4413 { 'type' => 'rmdir', 'object' => $realfile });
4416 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4417 # is (or was) a symlink ..
4418 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4419 push(@main::locked_file_diff,
4420 { 'type' => 'symlink', 'object' => $realfile,
4423 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4424 push(@main::locked_file_diff,
4425 { 'type' => 'unsymlink', 'object' => $realfile,
4426 'data' => $main::locked_file_data{$realfile} });
4428 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4429 push(@main::locked_file_diff,
4430 { 'type' => 'resymlink', 'object' => $realfile,
4435 # is a file, or has changed type?!
4436 my ($diff, $delete_file);
4437 my $type = "modify";
4439 open(NEWFILE, ">$realfile");
4444 if (!defined($main::locked_file_data{$realfile})) {
4447 open(ORIGFILE, ">$realfile.webminorig");
4448 print ORIGFILE $main::locked_file_data{$realfile};
4450 $diff = &backquote_command(
4451 "diff ".quotemeta("$realfile.webminorig")." ".
4452 quotemeta($realfile)." 2>/dev/null");
4453 push(@main::locked_file_diff,
4454 { 'type' => $type, 'object' => $realfile,
4455 'data' => $diff } ) if ($diff);
4456 unlink("$realfile.webminorig");
4457 unlink($realfile) if ($delete_file);
4460 if ($gconfig{'logfullfiles'}) {
4461 # Add file details to list of those to fully log
4462 $main::orig_file_data{$realfile} ||=
4463 $main::locked_file_data{$realfile};
4464 $main::orig_file_type{$realfile} ||=
4465 $main::locked_file_type{$realfile};
4468 delete($main::locked_file_data{$realfile});
4469 delete($main::locked_file_type{$realfile});
4473 =head2 test_lock(file)
4475 Returns 1 if some file is currently locked, 0 if not.
4480 my $realfile = &translate_filename($_[0]);
4481 return 0 if (!$_[0]);
4482 return 1 if (defined($main::locked_file_list{$realfile}));
4483 return 0 if (!&can_lock_file($realfile));
4485 if (open(LOCKING, "$realfile.lock")) {
4490 return $pid && kill(0, $pid);
4493 =head2 unlock_all_files
4495 Unlocks all files locked by the current script.
4498 sub unlock_all_files
4500 foreach $f (keys %main::locked_file_list) {
4505 =head2 can_lock_file(file)
4507 Returns 1 if some file should be locked, based on the settings in the
4508 Webmin Configuration module. For internal use by lock_file only.
4513 if (&is_readonly_mode()) {
4514 return 0; # never lock in read-only mode
4516 elsif ($gconfig{'lockmode'} == 0) {
4519 elsif ($gconfig{'lockmode'} == 1) {
4523 # Check if under any of the directories
4525 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4526 if (&same_file($d, $_[0]) ||
4527 &is_under_directory($d, $_[0])) {
4531 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4535 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4537 Log some action taken by a user. This is typically called at the end of a
4538 script, once all file changes are complete and all commands run. The
4541 =item action - A short code for the action being performed, like 'create'.
4543 =item type - A code for the type of object the action is performed to, like 'user'.
4545 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4547 =item params - A hash ref of additional information about the action.
4549 =item module - Name of the module in which the action was performed, which defaults to the current module.
4551 =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.
4553 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4555 =item client-ip - IP address of the browser that performed the action.
4560 return if (!$gconfig{'log'} || &is_readonly_mode());
4561 my $m = $_[4] ? $_[4] : &get_module_name();
4563 if ($gconfig{'logclear'}) {
4564 # check if it is time to clear the log
4565 my @st = stat("$webmin_logfile.time");
4566 my $write_logtime = 0;
4568 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4569 # clear logfile and all diff files
4570 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4571 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4572 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4573 unlink($webmin_logfile);
4580 if ($write_logtime) {
4581 open(LOGTIME, ">$webmin_logfile.time");
4582 print LOGTIME time(),"\n";
4587 # If an action script directory is defined, call the appropriate scripts
4588 if ($gconfig{'action_script_dir'}) {
4589 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4590 my ($basedir) = $gconfig{'action_script_dir'};
4592 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4595 opendir(DIR, $dir) or die "Can't open $dir: $!";
4596 while (defined($file = readdir(DIR))) {
4597 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4598 if (-x "$dir/$file") {
4599 # Call a script notifying it of the action
4601 $ENV{'ACTION_MODULE'} = &get_module_name();
4602 $ENV{'ACTION_ACTION'} = $_[0];
4603 $ENV{'ACTION_TYPE'} = $_[1];
4604 $ENV{'ACTION_OBJECT'} = $_[2];
4605 $ENV{'ACTION_SCRIPT'} = $script_name;
4606 foreach my $p (keys %param) {
4607 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4609 system("$dir/$file", @_,
4610 "<$null_file", ">$null_file", "2>&1");
4618 # should logging be done at all?
4619 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4620 split(/\s+/, $gconfig{'logusers'})) < 0);
4621 return if ($gconfig{'logmodules'} && &indexof($m,
4622 split(/\s+/, $gconfig{'logmodules'})) < 0);
4626 my @tm = localtime($now);
4627 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4628 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4629 $main::action_id_count++;
4630 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4631 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4632 $tm[2], $tm[1], $tm[0],
4633 $remote_user || '-',
4634 $main::session_id || '-',
4635 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4636 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4637 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4639 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4640 my $v = $_[3]->{$k};
4646 elsif (ref($v) eq 'ARRAY') {
4650 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4651 $line .= " $k='$vv'";
4655 foreach $vv (split(/\0/, $v)) {
4657 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4658 $line .= " $k='$vv'";
4661 $param{$k} = join(" ", @pv);
4663 open(WEBMINLOG, ">>$webmin_logfile");
4664 print WEBMINLOG $line,"\n";
4666 if ($gconfig{'logperms'}) {
4667 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4670 chmod(0600, $webmin_logfile);
4673 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4674 # Find and record the changes made to any locked files, or commands run
4676 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4677 foreach my $d (@main::locked_file_diff) {
4678 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4679 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4680 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4681 print DIFFLOG $d->{'data'};
4683 if ($d->{'input'}) {
4684 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4685 print DIFFLOG $d->{'input'};
4688 if ($gconfig{'logperms'}) {
4689 chmod(oct($gconfig{'logperms'}),
4690 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4691 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4695 @main::locked_file_diff = undef;
4697 if ($gconfig{'logfullfiles'}) {
4698 # Save the original contents of any modified files
4700 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4701 foreach my $f (keys %main::orig_file_data) {
4702 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4703 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4704 if (!defined($main::orig_file_type{$f})) {
4705 print ORIGLOG -1," ",$f,"\n";
4708 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4710 print ORIGLOG $main::orig_file_data{$f};
4712 if ($gconfig{'logperms'}) {
4713 chmod(oct($gconfig{'logperms'}),
4714 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4718 %main::orig_file_data = undef;
4719 %main::orig_file_type = undef;
4723 if ($gconfig{'logsyslog'}) {
4724 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4725 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4726 setlogsock("inet");';
4728 # Syslog module is installed .. try to convert to a
4729 # human-readable form
4731 my $mod = &get_module_name();
4732 my $mdir = module_root_directory($mod);
4733 if (-r "$mdir/log_parser.pl") {
4734 &foreign_require($mod, "log_parser.pl");
4736 foreach my $k (keys %{$_[3]}) {
4737 my $v = $_[3]->{$k};
4738 if (ref($v) eq 'ARRAY') {
4739 $params{$k} = join("\0", @$v);
4745 $msg = &foreign_call($mod, "parse_webmin_log",
4746 $remote_user, $script_name,
4747 $_[0], $_[1], $_[2], \%params);
4748 $msg =~ s/<[^>]*>//g; # Remove tags
4750 elsif ($_[0] eq "_config_") {
4751 my %wtext = &load_language("webminlog");
4752 $msg = $wtext{'search_config'};
4754 $msg ||= "$_[0] $_[1] $_[2]";
4755 my %info = &get_module_info($m);
4756 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4761 =head2 additional_log(type, object, data, [input])
4763 Records additional log data for an upcoming call to webmin_log, such
4764 as a command that was run or SQL that was executed. Typically you will never
4765 need to call this function directory.
4770 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4771 push(@main::locked_file_diff,
4772 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4773 'input' => $_[3] } );
4777 =head2 webmin_debug_log(type, message)
4779 Write something to the Webmin debug log. For internal use only.
4782 sub webmin_debug_log
4784 my ($type, $msg) = @_;
4785 return 0 if (!$main::opened_debug_log);
4786 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4787 if ($gconfig{'debug_modules'}) {
4788 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
4789 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
4792 my @tm = localtime($now);
4794 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4795 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4796 $tm[2], $tm[1], $tm[0],
4797 $remote_user || "-",
4798 $ENV{'REMOTE_HOST'} || "-",
4799 &get_module_name() || "-",
4802 seek(main::DEBUGLOG, 0, 2);
4803 print main::DEBUGLOG $line."\n";
4807 =head2 system_logged(command)
4809 Just calls the Perl system() function, but also logs the command run.
4814 if (&is_readonly_mode()) {
4815 print STDERR "Vetoing command $_[0]\n";
4818 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4819 my $cmd = join(" ", @realcmd);
4821 if ($cmd =~ s/(\s*&\s*)$//) {
4824 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4825 $cmd =~ s/^\((.*)\)\s*$/$1/;
4827 &additional_log('exec', undef, $cmd);
4828 return system(@realcmd);
4831 =head2 backquote_logged(command)
4833 Executes a command and returns the output (like `command`), but also logs it.
4836 sub backquote_logged
4838 if (&is_readonly_mode()) {
4840 print STDERR "Vetoing command $_[0]\n";
4843 my $realcmd = &translate_command($_[0]);
4846 if ($cmd =~ s/(\s*&\s*)$//) {
4849 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4850 $cmd =~ s/^\((.*)\)\s*$/$1/;
4852 &additional_log('exec', undef, $cmd);
4853 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4857 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4859 Runs some command, waiting at most the given number of seconds for it to
4860 complete, and returns the output. The maxlines parameter sets the number
4861 of lines of output to capture. The safe parameter should be set to 1 if the
4862 command is safe for read-only mode users to run.
4865 sub backquote_with_timeout
4867 my $realcmd = &translate_command($_[0]);
4868 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4869 if ($gconfig{'debug_what_cmd'});
4871 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4876 my $elapsed = time() - $start;
4877 last if ($elapsed > $_[1]);
4879 vec($rmask, fileno(OUT), 1) = 1;
4880 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4881 last if (!$sel || $sel < 0);
4883 last if (!defined($line));
4886 if ($_[3] && $linecount >= $_[3]) {
4891 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4895 return wantarray ? ($out, $timed_out) : $out;
4898 =head2 backquote_command(command, safe?)
4900 Executes a command and returns the output (like `command`), subject to
4901 command translation. The safe parameter should be set to 1 if the command
4902 is safe for read-only mode users to run.
4905 sub backquote_command
4907 if (&is_readonly_mode() && !$_[1]) {
4908 print STDERR "Vetoing command $_[0]\n";
4912 my $realcmd = &translate_command($_[0]);
4913 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4917 =head2 kill_logged(signal, pid, ...)
4919 Like Perl's built-in kill function, but also logs the fact that some process
4920 was killed. On Windows, falls back to calling process.exe to terminate a
4926 return scalar(@_)-1 if (&is_readonly_mode());
4927 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4928 if ($gconfig{'debug_what_procs'});
4929 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4930 if ($gconfig{'os_type'} eq 'windows') {
4931 # Emulate some kills with process.exe
4932 my $arg = $_[0] eq "KILL" ? "-k" :
4933 $_[0] eq "TERM" ? "-q" :
4934 $_[0] eq "STOP" ? "-s" :
4935 $_[0] eq "CONT" ? "-r" : undef;
4937 foreach my $p (@_[1..@_-1]) {
4939 $ok ||= kill($_[0], $p);
4942 &execute_command("process $arg $p");
4954 =head2 rename_logged(old, new)
4956 Re-names a file and logs the rename. If the old and new files are on different
4957 filesystems, calls mv or the Windows rename function to do the job.
4962 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4963 return &rename_file($_[0], $_[1]);
4966 =head2 rename_file(old, new)
4968 Renames a file or directory. If the old and new files are on different
4969 filesystems, calls mv or the Windows rename function to do the job.
4974 if (&is_readonly_mode()) {
4975 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4978 my $src = &translate_filename($_[0]);
4979 my $dst = &translate_filename($_[1]);
4980 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4981 if ($gconfig{'debug_what_ops'});
4982 my $ok = rename($src, $dst);
4983 if (!$ok && $! !~ /permission/i) {
4984 # Try the mv command, in case this is a cross-filesystem rename
4985 if ($gconfig{'os_type'} eq 'windows') {
4986 # Need to use rename
4987 my $out = &backquote_command("rename ".quotemeta($_[0]).
4988 " ".quotemeta($_[1])." 2>&1");
4990 $! = $out if (!$ok);
4994 my $out = &backquote_command("mv ".quotemeta($_[0]).
4995 " ".quotemeta($_[1])." 2>&1");
4997 $! = $out if (!$ok);
5003 =head2 symlink_logged(src, dest)
5005 Create a symlink, and logs it. Effectively does the same thing as the Perl
5012 my $rv = &symlink_file($_[0], $_[1]);
5013 &unlock_file($_[1]);
5017 =head2 symlink_file(src, dest)
5019 Creates a soft link, unless in read-only mode. Effectively does the same thing
5020 as the Perl symlink function.
5025 if (&is_readonly_mode()) {
5026 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5029 my $src = &translate_filename($_[0]);
5030 my $dst = &translate_filename($_[1]);
5031 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5032 if ($gconfig{'debug_what_ops'});
5033 return symlink($src, $dst);
5036 =head2 link_file(src, dest)
5038 Creates a hard link, unless in read-only mode. The existing new link file
5039 will be deleted if necessary. Effectively the same as Perl's link function.
5044 if (&is_readonly_mode()) {
5045 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5048 my $src = &translate_filename($_[0]);
5049 my $dst = &translate_filename($_[1]);
5050 &webmin_debug_log('LINK', "src=$src dst=$dst")
5051 if ($gconfig{'debug_what_ops'});
5052 unlink($dst); # make sure link works
5053 return link($src, $dst);
5056 =head2 make_dir(dir, perms, recursive)
5058 Creates a directory and sets permissions on it, unless in read-only mode.
5059 The perms parameter sets the octal permissions to apply, which unlike Perl's
5060 mkdir will really get set. The recursive flag can be set to 1 to have the
5061 function create parent directories too.
5066 my ($dir, $perms, $recur) = @_;
5067 if (&is_readonly_mode()) {
5068 print STDERR "Vetoing directory $dir\n";
5071 $dir = &translate_filename($dir);
5072 my $exists = -d $dir ? 1 : 0;
5073 return 1 if ($exists && $recur); # already exists
5074 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5075 my $rv = mkdir($dir, $perms);
5076 if (!$rv && $recur) {
5077 # Failed .. try mkdir -p
5078 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5079 my $ex = &execute_command("mkdir $param "."e_path($dir));
5085 chmod($perms, $dir);
5090 =head2 set_ownership_permissions(user, group, perms, file, ...)
5092 Sets the user, group owner and permissions on some files. The parameters are :
5094 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5096 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5098 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5100 =item file - One or more files or directories to modify.
5103 sub set_ownership_permissions
5105 my ($user, $group, $perms, @files) = @_;
5106 if (&is_readonly_mode()) {
5107 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5110 @files = map { &translate_filename($_) } @files;
5111 if ($gconfig{'debug_what_ops'}) {
5112 foreach my $f (@files) {
5113 &webmin_debug_log('PERMS',
5114 "file=$f user=$user group=$group perms=$perms");
5118 if (defined($user)) {
5119 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5121 if (defined($group)) {
5122 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5125 my @uinfo = getpwuid($uid);
5128 $rv = chown($uid, $gid, @files);
5130 if ($rv && defined($perms)) {
5131 $rv = chmod($perms, @files);
5136 =head2 unlink_logged(file, ...)
5138 Like Perl's unlink function, but locks the files beforehand and un-locks them
5139 after so that the deletion is logged by Webmin.
5145 foreach my $f (@_) {
5146 if (!&test_lock($f)) {
5151 my @rv = &unlink_file(@_);
5152 foreach my $f (@_) {
5157 return wantarray ? @rv : $rv[0];
5160 =head2 unlink_file(file, ...)
5162 Deletes some files or directories. Like Perl's unlink function, but also
5163 recursively deletes directories with the rm command if needed.
5168 return 1 if (&is_readonly_mode());
5171 foreach my $f (@_) {
5172 &unflush_file_lines($f);
5173 my $realf = &translate_filename($f);
5174 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5176 if (!rmdir($realf)) {
5178 if ($gconfig{'os_type'} eq 'windows') {
5179 # Call del and rmdir commands
5182 my $out = `del /q "$qm" 2>&1`;
5184 $out = `rmdir "$qm" 2>&1`;
5189 my $qm = quotemeta($realf);
5190 $out = `rm -rf $qm 2>&1`;
5199 if (!unlink($realf)) {
5205 return wantarray ? ($rv, $err) : $rv;
5208 =head2 copy_source_dest(source, dest)
5210 Copy some file or directory to a new location. Returns 1 on success, or 0
5211 on failure - also sets $! on failure. If the source is a directory, uses
5212 piped tar commands to copy a whole directory structure including permissions
5216 sub copy_source_dest
5218 return (1, undef) if (&is_readonly_mode());
5219 my ($src, $dst) = @_;
5222 &webmin_debug_log('COPY', "src=$src dst=$dst")
5223 if ($gconfig{'debug_what_ops'});
5224 if ($gconfig{'os_type'} eq 'windows') {
5225 # No tar or cp on windows, so need to use copy command
5229 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5232 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5240 # A directory .. need to copy with tar command
5241 my @st = stat($src);
5244 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5245 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5252 # Can just copy with cp
5253 my $out = &backquote_logged("cp -p ".quotemeta($src).
5254 " ".quotemeta($dst)." 2>&1");
5260 return wantarray ? ($ok, $err) : $ok;
5263 =head2 remote_session_name(host|&server)
5265 Generates a session ID for some server. For this server, this will always
5266 be an empty string. For a server object it will include the hostname and
5267 port and PID. For a server name, it will include the hostname and PID. For
5271 sub remote_session_name
5273 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5274 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5275 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5276 ref($_[0]) ? "" : "$_[0].$$";
5279 =head2 remote_foreign_require(server, module, file)
5281 Connects to rpc.cgi on a remote webmin server and have it open a session
5282 to a process that will actually do the require and run functions. This is the
5283 equivalent for foreign_require, but for a remote Webmin system. The server
5284 parameter can either be a hostname of a system registered in the Webmin
5285 Servers Index module, or a hash reference for a system from that module.
5288 sub remote_foreign_require
5290 my $call = { 'action' => 'require',
5293 my $sn = &remote_session_name($_[0]);
5294 if ($remote_session{$sn}) {
5295 $call->{'session'} = $remote_session{$sn};
5298 $call->{'newsession'} = 1;
5300 my $rv = &remote_rpc_call($_[0], $call);
5301 if ($rv->{'session'}) {
5302 $remote_session{$sn} = $rv->{'session'};
5303 $remote_session_server{$sn} = $_[0];
5307 =head2 remote_foreign_call(server, module, function, [arg]*)
5309 Call a function on a remote server. Must have been setup first with
5310 remote_foreign_require for the same server and module. Equivalent to
5311 foreign_call, but with the extra server parameter to specify the remote
5315 sub remote_foreign_call
5317 return undef if (&is_readonly_mode());
5318 my $sn = &remote_session_name($_[0]);
5319 return &remote_rpc_call($_[0], { 'action' => 'call',
5322 'session' => $remote_session{$sn},
5323 'args' => [ @_[3 .. $#_] ] } );
5326 =head2 remote_foreign_check(server, module, [api-only])
5328 Checks if some module is installed and supported on a remote server. Equivilant
5329 to foreign_check, but for the remote Webmin system specified by the server
5333 sub remote_foreign_check
5335 return &remote_rpc_call($_[0], { 'action' => 'check',
5340 =head2 remote_foreign_config(server, module)
5342 Gets the configuration for some module from a remote server, as a hash.
5343 Equivalent to foreign_config, but for a remote system.
5346 sub remote_foreign_config
5348 return &remote_rpc_call($_[0], { 'action' => 'config',
5349 'module' => $_[1] });
5352 =head2 remote_eval(server, module, code)
5354 Evaluates some perl code in the context of a module on a remote webmin server.
5355 The server parameter must be the hostname of a remote system, module must
5356 be a module directory name, and code a string of Perl code to run. This can
5357 only be called after remote_foreign_require for the same server and module.
5362 return undef if (&is_readonly_mode());
5363 my $sn = &remote_session_name($_[0]);
5364 return &remote_rpc_call($_[0], { 'action' => 'eval',
5367 'session' => $remote_session{$sn} });
5370 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5372 Transfers some local file to another server via Webmin's RPC protocol, and
5373 returns the resulting remote filename. If the remotefile parameter is given,
5374 that is the destination filename which will be used. Otherwise a randomly
5375 selected temporary filename will be used, and returned by the function.
5380 return undef if (&is_readonly_mode());
5382 my $sn = &remote_session_name($_[0]);
5383 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5384 # Copy data over TCP connection
5385 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5387 'name' => $_[3] } );
5389 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5390 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5391 return &$main::remote_error_handler("Failed to transfer file : $error")
5394 while(read(FILE, $got, 1024) > 0) {
5398 shutdown(TWRITE, 1);
5400 if ($error && $error !~ /^OK/) {
5401 # Got back an error!
5402 return &$main::remote_error_handler("Failed to transfer file : $error");
5408 # Just pass file contents as parameters
5410 while(read(FILE, $got, 1024) > 0) {
5414 return &remote_rpc_call($_[0], { 'action' => 'write',
5417 'session' => $remote_session{$sn} });
5421 =head2 remote_read(server, localfile, remotefile)
5423 Transfers a file from a remote server to this system, using Webmin's RPC
5424 protocol. The server parameter must be the hostname of a system registered
5425 in the Webmin Servers Index module, localfile is the destination path on this
5426 system, and remotefile is the file to fetch from the remote server.
5431 my $sn = &remote_session_name($_[0]);
5432 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5433 # Copy data over TCP connection
5434 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5435 'file' => $_[2] } );
5437 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5440 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5441 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5442 return &$main::remote_error_handler("Failed to transfer file : $error")
5445 open(FILE, ">$_[1]");
5446 while(read(TREAD, $got, 1024) > 0) {
5453 # Just get data as return value
5454 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5456 'session' => $remote_session{$sn} });
5457 open(FILE, ">$_[1]");
5463 =head2 remote_finished
5465 Close all remote sessions. This happens automatically after a while
5466 anyway, but this function should be called to clean things up faster.
5471 foreach my $sn (keys %remote_session) {
5472 my $server = $remote_session_server{$sn};
5473 &remote_rpc_call($server, { 'action' => 'quit',
5474 'session' => $remote_session{$sn} } );
5475 delete($remote_session{$sn});
5476 delete($remote_session_server{$sn});
5478 foreach $fh (keys %fast_fh_cache) {
5480 delete($fast_fh_cache{$fh});
5484 =head2 remote_error_setup(&function)
5486 Sets a function to be called instead of &error when a remote RPC operation
5487 fails. Useful if you want to have more control over your remote operations.
5490 sub remote_error_setup
5492 $main::remote_error_handler = $_[0] || \&error;
5495 =head2 remote_rpc_call(server, structure)
5497 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5498 and then reads back a reply structure. This is mainly for internal use only,
5499 and is called by the other remote_* functions.
5505 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5507 # Server structure was given
5509 $serv->{'user'} || $serv->{'id'} == 0 ||
5510 return &$main::remote_error_handler(
5511 "No Webmin login set for server");
5514 # lookup the server in the webmin servers module if needed
5515 if (!%main::remote_servers_cache) {
5516 &foreign_require("servers", "servers-lib.pl");
5517 foreach $s (&foreign_call("servers", "list_servers")) {
5518 $main::remote_servers_cache{$s->{'host'}} = $s;
5519 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5522 $serv = $main::remote_servers_cache{$_[0]};
5523 $serv || return &$main::remote_error_handler(
5524 "No Webmin Servers entry for $_[0]");
5525 $serv->{'user'} || return &$main::remote_error_handler(
5526 "No login set for server $_[0]");
5528 my $ip = $serv->{'ip'} || $serv->{'host'};
5530 # Work out the username and password
5532 if ($serv->{'sameuser'}) {
5533 $user = $remote_user;
5534 defined($main::remote_pass) || return &$main::remote_error_handler(
5535 "Password for this server is not available");
5536 $pass = $main::remote_pass;
5539 $user = $serv->{'user'};
5540 $pass = $serv->{'pass'};
5543 if ($serv->{'fast'} || !$sn) {
5544 # Make TCP connection call to fastrpc.cgi
5545 if (!$fast_fh_cache{$sn} && $sn) {
5546 # Need to open the connection
5547 my $con = &make_http_connection(
5548 $ip, $serv->{'port'}, $serv->{'ssl'},
5549 "POST", "/fastrpc.cgi");
5550 return &$main::remote_error_handler(
5551 "Failed to connect to $serv->{'host'} : $con")
5553 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5554 &write_http_connection($con, "User-agent: Webmin\r\n");
5555 my $auth = &encode_base64("$user:$pass");
5557 &write_http_connection($con, "Authorization: basic $auth\r\n");
5558 &write_http_connection($con, "Content-length: ",
5559 length($tostr),"\r\n");
5560 &write_http_connection($con, "\r\n");
5561 &write_http_connection($con, $tostr);
5563 # read back the response
5564 my $line = &read_http_connection($con);
5565 $line =~ tr/\r\n//d;
5566 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5567 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5569 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5570 return &$main::remote_error_handler("HTTP error : $line");
5572 $line = &read_http_connection($con);
5573 $line =~ tr/\r\n//d;
5575 $line = &read_http_connection($con);
5576 if ($line =~ /^0\s+(.*)/) {
5577 return &$main::remote_error_handler("RPC error : $1");
5579 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5580 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5581 # Started ok .. connect and save SID
5582 &close_http_connection($con);
5583 my ($port, $sid, $version, $error) = ($1, $2, $3);
5584 &open_socket($ip, $port, $sid, \$error);
5585 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5587 $fast_fh_cache{$sn} = $sid;
5588 $remote_server_version{$sn} = $version;
5591 while($stuff = &read_http_connection($con)) {
5594 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5597 elsif (!$fast_fh_cache{$sn}) {
5598 # Open the connection by running fastrpc.cgi locally
5599 pipe(RPCOUTr, RPCOUTw);
5603 open(STDOUT, ">&RPCOUTw");
5607 $ENV{'REQUEST_METHOD'} = 'GET';
5608 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5609 $ENV{'SERVER_ROOT'} ||= $root_directory;
5611 if ($base_remote_user ne 'root' &&
5612 $base_remote_user ne 'admin') {
5613 # Need to fake up a login for the CGI!
5614 &read_acl(undef, \%acl);
5615 $ENV{'BASE_REMOTE_USER'} =
5616 $ENV{'REMOTE_USER'} =
5617 $acl{'root'} ? 'root' : 'admin';
5619 delete($ENV{'FOREIGN_MODULE_NAME'});
5620 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5621 chdir($root_directory);
5622 if (!exec("$root_directory/fastrpc.cgi")) {
5623 print "exec failed : $!\n";
5630 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5634 if ($line =~ /^0\s+(.*)/) {
5635 return &$main::remote_error_handler("RPC error : $2");
5637 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5638 # Started ok .. connect and save SID
5640 my ($port, $sid, $error) = ($1, $2, undef);
5641 &open_socket("localhost", $port, $sid, \$error);
5642 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5643 $fast_fh_cache{$sn} = $sid;
5650 &error("Bad response from fastrpc.cgi : $line");
5653 # Got a connection .. send off the request
5654 my $fh = $fast_fh_cache{$sn};
5655 my $tostr = &serialise_variable($_[1]);
5656 print $fh length($tostr)," $fh\n";
5658 my $rlen = int(<$fh>);
5659 my ($fromstr, $got);
5660 while(length($fromstr) < $rlen) {
5661 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5662 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5665 my $from = &unserialise_variable($fromstr);
5667 return &$main::remote_error_handler("Remote Webmin error");
5669 if (defined($from->{'arv'})) {
5670 return @{$from->{'arv'}};
5673 return $from->{'rv'};
5677 # Call rpc.cgi on remote server
5678 my $tostr = &serialise_variable($_[1]);
5680 my $con = &make_http_connection($ip, $serv->{'port'},
5681 $serv->{'ssl'}, "POST", "/rpc.cgi");
5682 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5684 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5685 &write_http_connection($con, "User-agent: Webmin\r\n");
5686 my $auth = &encode_base64("$user:$pass");
5688 &write_http_connection($con, "Authorization: basic $auth\r\n");
5689 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5690 &write_http_connection($con, "\r\n");
5691 &write_http_connection($con, $tostr);
5693 # read back the response
5694 my $line = &read_http_connection($con);
5695 $line =~ tr/\r\n//d;
5696 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5697 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5699 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5701 $line = &read_http_connection($con);
5702 $line =~ tr/\r\n//d;
5705 while($line = &read_http_connection($con)) {
5709 my $from = &unserialise_variable($fromstr);
5710 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5711 if (defined($from->{'arv'})) {
5712 return @{$from->{'arv'}};
5715 return $from->{'rv'};
5720 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5722 Executes some function in parallel on multiple servers at once. Fills in
5723 the returns and errors arrays respectively. If the module and library
5724 parameters are given, that module is remotely required on the server first,
5725 to check if it is connectable. The parameters are :
5727 =item servers - A list of Webmin system hash references.
5729 =item parallel - Number of parallel operations to perform.
5731 =item function - Reference to function to call for each system.
5733 =item args - Additional parameters to the function.
5735 =item returns - Array ref to place return values into, in same order as servers.
5737 =item errors - Array ref to place error messages into.
5739 =item module - Optional module to require on the remote system first.
5741 =item library - Optional library to require in the module.
5744 sub remote_multi_callback
5746 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5747 &remote_error_setup(\&remote_multi_callback_error);
5749 # Call the functions
5751 foreach my $g (@$servs) {
5757 $remote_multi_callback_err = undef;
5759 # Require the remote lib
5760 &remote_foreign_require($g->{'host'}, $mod, $lib);
5761 if ($remote_multi_callback_err) {
5762 # Failed .. return error
5763 print $wh &serialise_variable(
5764 [ undef, $remote_multi_callback_err ]);
5770 my $a = ref($args) ? $args->[$p] : $args;
5771 my $rv = &$func($g, $a);
5774 print $wh &serialise_variable(
5775 [ $rv, $remote_multi_callback_err ]);
5783 # Read back the results
5785 foreach my $g (@$servs) {
5789 $errs->[$p] = "Failed to read response from $g->{'host'}";
5792 my $rv = &unserialise_variable($line);
5794 $rets->[$p] = $rv->[0];
5795 $errs->[$p] = $rv->[1];
5800 &remote_error_setup(undef);
5803 sub remote_multi_callback_error
5805 $remote_multi_callback_err = $_[0];
5808 =head2 serialise_variable(variable)
5810 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5811 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5812 called on each member to serialize the entire object.
5815 sub serialise_variable
5817 if (!defined($_[0])) {
5823 $rv = &urlize($_[0]);
5825 elsif ($r eq 'SCALAR') {
5826 $rv = &urlize(${$_[0]});
5828 elsif ($r eq 'ARRAY') {
5829 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5831 elsif ($r eq 'HASH') {
5832 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5833 &urlize(&serialise_variable($_[0]->{$_})) }
5836 elsif ($r eq 'REF') {
5837 $rv = &serialise_variable(${$_[0]});
5839 elsif ($r eq 'CODE') {
5844 # An object - treat as a hash
5845 $r = "OBJECT ".&urlize($r);
5846 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5847 &urlize(&serialise_variable($_[0]->{$_})) }
5850 return ($r ? $r : 'VAL').",".$rv;
5853 =head2 unserialise_variable(string)
5855 Converts a string created by serialise_variable() back into the original
5856 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5857 object, the same class is used on this system, if available.
5860 sub unserialise_variable
5862 my @v = split(/,/, $_[0]);
5864 if ($v[0] eq 'VAL') {
5865 @v = split(/,/, $_[0], -1);
5866 $rv = &un_urlize($v[1]);
5868 elsif ($v[0] eq 'SCALAR') {
5869 local $r = &un_urlize($v[1]);
5872 elsif ($v[0] eq 'ARRAY') {
5874 for(my $i=1; $i<@v; $i++) {
5875 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5878 elsif ($v[0] eq 'HASH') {
5880 for(my $i=1; $i<@v; $i+=2) {
5881 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5882 &unserialise_variable(&un_urlize($v[$i+1]));
5885 elsif ($v[0] eq 'REF') {
5886 local $r = &unserialise_variable($v[1]);
5889 elsif ($v[0] eq 'UNDEF') {
5892 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5893 # An object hash that we have to re-bless
5896 for(my $i=1; $i<@v; $i+=2) {
5897 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5898 &unserialise_variable(&un_urlize($v[$i+1]));
5906 =head2 other_groups(user)
5908 Returns a list of secondary groups a user is a member of, as a list of
5917 while(my @g = getgrent()) {
5918 my @m = split(/\s+/, $g[3]);
5919 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5921 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5925 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5927 Returns HTML for a button that pops up a data chooser window. The parameters
5930 =item dayfield - Name of the text field to place the day of the month into.
5932 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5934 =item yearfield - Name of the text field to place the year into.
5937 sub date_chooser_button
5939 return &theme_date_chooser_button(@_)
5940 if (defined(&theme_date_chooser_button));
5941 my ($w, $h) = (250, 225);
5942 if ($gconfig{'db_sizedate'}) {
5943 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5945 return "<input type=button onClick='window.dfield = form.$_[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";
5948 =head2 help_file(module, file)
5950 Returns the path to a module's help file of some name, typically under the
5951 help directory with a .html extension.
5956 my $mdir = &module_root_directory($_[0]);
5957 my $dir = "$mdir/help";
5958 foreach my $o (@lang_order_list) {
5959 my $lang = "$dir/$_[1].$o.html";
5960 return $lang if (-r $lang);
5962 return "$dir/$_[1].html";
5967 Seeds the random number generator, if not already done in this script. On Linux
5968 this makes use of the current time, process ID and a read from /dev/urandom.
5969 On other systems, only the current time and process ID are used.
5974 if (!$main::done_seed_random) {
5975 if (open(RANDOM, "/dev/urandom")) {
5977 read(RANDOM, $buf, 4);
5979 srand(time() ^ $$ ^ $buf);
5984 $main::done_seed_random = 1;
5988 =head2 disk_usage_kb(directory)
5990 Returns the number of kB used by some directory and all subdirs. Implemented
5991 by calling the C<du -k> command.
5996 my $dir = &translate_filename($_[0]);
5998 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6000 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6002 return $out =~ /^([0-9]+)/ ? $1 : "???";
6005 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6007 Returns the number of bytes taken up by all files in some directory and all
6008 sub-directories, by summing up their lengths. The disk_usage_kb is more
6009 reflective of reality, as the filesystem typically pads file sizes to 1k or
6013 sub recursive_disk_usage
6015 my $dir = &translate_filename($_[0]);
6022 my @st = stat($dir);
6028 my @files = readdir(DIR);
6030 foreach my $f (@files) {
6031 next if ($f eq "." || $f eq "..");
6032 next if ($skip && $f =~ /$skip/);
6033 next if ($only && $f !~ /$only/);
6034 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6040 =head2 help_search_link(term, [ section, ... ] )
6042 Returns HTML for a link to the man module for searching local and online
6043 docs for various search terms. The term parameter can either be a single
6044 word like 'bind', or a space-separated list of words. This function is typically
6045 used by modules that want to refer users to additional documentation in man
6046 pages or local system doc files.
6049 sub help_search_link
6051 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6052 my $for = &urlize(shift(@_));
6053 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6054 join("&", map { "section=$_" } @_)."&".
6055 "for=$for&exact=1&check=".&get_module_name()."'>".
6056 $text{'helpsearch'}."</a>\n";
6063 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6065 Opens a connection to some HTTP server, maybe through a proxy, and returns
6066 a handle object. The handle can then be used to send additional headers
6067 and read back a response. If anything goes wrong, returns an error string.
6068 The parameters are :
6070 =item host - Hostname or IP address of the webserver to connect to.
6072 =item port - HTTP port number to connect to.
6074 =item ssl - Set to 1 to connect in SSL mode.
6076 =item method - HTTP method, like GET or POST.
6078 =item page - Page to request on the webserver, like /foo/index.html
6080 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6083 sub make_http_connection
6085 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6088 foreach my $h (@$headers) {
6089 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6093 if (&is_readonly_mode()) {
6094 return "HTTP connections not allowed in readonly mode";
6096 my $rv = { 'fh' => time().$$ };
6099 eval "use Net::SSLeay";
6100 $@ && return $text{'link_essl'};
6101 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6102 eval "Net::SSLeay::load_error_strings()";
6103 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6104 return "Failed to create SSL context";
6105 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6106 return "Failed to create SSL connection";
6108 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6109 !&no_proxy($host)) {
6112 &open_socket($1, $2, $rv->{'fh'}, \$error);
6115 my $fh = $rv->{'fh'};
6116 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6117 if ($gconfig{'proxy_user'}) {
6118 my $auth = &encode_base64(
6119 "$gconfig{'proxy_user'}:".
6120 "$gconfig{'proxy_pass'}");
6121 $auth =~ tr/\r\n//d;
6122 print $fh "Proxy-Authorization: Basic $auth\r\n";
6126 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6127 return "Proxy error : $3" if ($2 != 200);
6130 return "Proxy error : $line";
6135 elsif (!$gconfig{'proxy_fallback'}) {
6136 # Connection to proxy failed - give up
6143 &open_socket($host, $port, $rv->{'fh'}, \$error);
6144 return $error if ($error);
6146 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6147 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6148 return "SSL connect() failed";
6149 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6150 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6153 # Plain HTTP request
6155 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6156 !&no_proxy($host)) {
6159 &open_socket($1, $2, $rv->{'fh'}, \$error);
6163 my $fh = $rv->{'fh'};
6164 my $rtxt = $method." ".
6165 "http://$host:$port$page HTTP/1.0\r\n";
6166 if ($gconfig{'proxy_user'}) {
6167 my $auth = &encode_base64(
6168 "$gconfig{'proxy_user'}:".
6169 "$gconfig{'proxy_pass'}");
6170 $auth =~ tr/\r\n//d;
6171 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6176 elsif (!$gconfig{'proxy_fallback'}) {
6181 # Connecting directly
6183 &open_socket($host, $port, $rv->{'fh'}, \$error);
6184 return $error if ($error);
6185 my $fh = $rv->{'fh'};
6186 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6193 =head2 read_http_connection(&handle, [bytes])
6195 Reads either one line or up to the specified number of bytes from the handle,
6196 originally supplied by make_http_connection.
6199 sub read_http_connection
6203 if ($h->{'ssl_con'}) {
6206 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6207 # need to read more..
6208 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6210 $rv = $h->{'buffer'};
6211 delete($h->{'buffer'});
6214 $h->{'buffer'} .= $more;
6216 $rv = substr($h->{'buffer'}, 0, $idx+1);
6217 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6220 if (length($h->{'buffer'})) {
6221 $rv = $h->{'buffer'};
6222 delete($h->{'buffer'});
6225 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6231 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6234 my $fh = $h->{'fh'};
6238 $rv = undef if ($rv eq "");
6242 =head2 write_http_connection(&handle, [data+])
6244 Writes the given data to the given HTTP connection handle.
6247 sub write_http_connection
6250 my $fh = $h->{'fh'};
6252 if ($h->{'ssl_ctx'}) {
6253 foreach my $s (@_) {
6254 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6255 $allok = 0 if (!$ok);
6259 my $ok = (print $fh @_);
6260 $allok = 0 if (!$ok);
6265 =head2 close_http_connection(&handle)
6267 Closes a connection to an HTTP server, identified by the given handle.
6270 sub close_http_connection
6276 =head2 clean_environment
6278 Deletes any environment variables inherited from miniserv so that they
6279 won't be passed to programs started by webmin. This is useful when calling
6280 programs that check for CGI-related environment variables and modify their
6281 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6284 sub clean_environment
6286 %UNCLEAN_ENV = %ENV;
6287 foreach my $k (keys %ENV) {
6288 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6292 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6293 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6294 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6295 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6296 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6297 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6298 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6299 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6305 =head2 reset_environment
6307 Puts the environment back how it was before clean_environment was callled.
6310 sub reset_environment
6313 foreach my $k (keys %UNCLEAN_ENV) {
6314 $ENV{$k} = $UNCLEAN_ENV{$k};
6316 undef(%UNCLEAN_ENV);
6320 =head2 progress_callback
6322 Never called directly, but useful for passing to &http_download to print
6323 out progress of an HTTP request.
6326 sub progress_callback
6328 if (defined(&theme_progress_callback)) {
6329 # Call the theme override
6330 return &theme_progress_callback(@_);
6334 print $progress_callback_prefix;
6336 $progress_size = $_[1];
6337 $progress_step = int($_[1] / 10);
6338 print &text('progress_size2', $progress_callback_url,
6339 &nice_size($progress_size)),"<br>\n";
6342 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6344 $last_progress_time = $last_progress_size = undef;
6346 elsif ($_[0] == 3) {
6348 my $sp = $progress_callback_prefix.(" " x 5);
6349 if ($progress_size) {
6350 # And we have a size to compare against
6351 my $st = int(($_[1] * 10) / $progress_size);
6352 my $time_now = time();
6353 if ($st != $progress_step ||
6354 $time_now - $last_progress_time > 60) {
6355 # Show progress every 10% or 60 seconds
6356 print $sp,&text('progress_datan', &nice_size($_[1]),
6357 int($_[1]*100/$progress_size)),"<br>\n";
6358 $last_progress_time = $time_now;
6360 $progress_step = $st;
6363 # No total size .. so only show in 100k jumps
6364 if ($_[1] > $last_progress_size+100*1024) {
6365 print $sp,&text('progress_data2n',
6366 &nice_size($_[1])),"<br>\n";
6367 $last_progress_size = $_[1];
6371 elsif ($_[0] == 4) {
6372 # All done downloading
6373 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6375 elsif ($_[0] == 5) {
6376 # Got new location after redirect
6377 $progress_callback_url = $_[1];
6379 elsif ($_[0] == 6) {
6381 $progress_callback_url = $_[1];
6382 print &text('progress_incache', $progress_callback_url),"<br>\n";
6386 =head2 switch_to_remote_user
6388 Changes the user and group of the current process to that of the unix user
6389 with the same name as the current webmin login, or fails if there is none.
6390 This should be called by Usermin module scripts that only need to run with
6391 limited permissions.
6394 sub switch_to_remote_user
6396 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6398 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6399 &create_missing_homedir(\@remote_user_info);
6401 &switch_to_unix_user(\@remote_user_info);
6402 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6403 $ENV{'HOME'} = $remote_user_info[7];
6405 # Export global variables to caller
6406 if ($main::export_to_caller) {
6407 my ($callpkg) = caller();
6408 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6412 =head2 switch_to_unix_user(&user-details)
6414 Switches the current process to the UID and group ID from the given list
6415 of user details, which must be in the format returned by getpwnam.
6418 sub switch_to_unix_user
6421 if (!defined($uinfo->[0])) {
6422 # No username given, so just use given GID
6423 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6426 # Use all groups from user
6427 ($(, $)) = ( $uinfo->[3],
6428 "$uinfo->[3] ".join(" ", $uinfo->[3],
6429 &other_groups($uinfo->[0])) );
6432 POSIX::setuid($uinfo->[2]);
6434 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6435 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6439 =head2 eval_as_unix_user(username, &code)
6441 Runs some code fragment with the effective UID and GID switch to that
6442 of the given Unix user, so that file IO takes place with his permissions.
6446 sub eval_as_unix_user
6448 my ($user, $code) = @_;
6449 my @uinfo = getpwnam($user);
6450 if (!scalar(@uinfo)) {
6451 &error("eval_as_unix_user called with invalid user $user");
6453 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6457 local $main::error_must_die = 1;
6464 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6467 return wantarray ? @rv : $rv[0];
6470 =head2 create_user_config_dirs
6472 Creates per-user config directories and sets $user_config_directory and
6473 $user_module_config_directory to them. Also reads per-user module configs
6474 into %userconfig. This should be called by Usermin module scripts that need
6475 to store per-user preferences or other settings.
6478 sub create_user_config_dirs
6480 return if (!$gconfig{'userconfig'});
6481 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6482 return if (!@uinfo || !$uinfo[7]);
6483 &create_missing_homedir(\@uinfo);
6484 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6485 if (!-d $user_config_directory) {
6486 mkdir($user_config_directory, 0700) ||
6487 &error("Failed to create $user_config_directory : $!");
6488 if ($< == 0 && $uinfo[2]) {
6489 chown($uinfo[2], $uinfo[3], $user_config_directory);
6492 if (&get_module_name()) {
6493 $user_module_config_directory = $user_config_directory."/".
6495 if (!-d $user_module_config_directory) {
6496 mkdir($user_module_config_directory, 0700) ||
6497 &error("Failed to create $user_module_config_directory : $!");
6498 if ($< == 0 && $uinfo[2]) {
6499 chown($uinfo[2], $uinfo[3], $user_config_directory);
6503 &read_file_cached("$module_root_directory/defaultuconfig",
6505 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6506 &read_file_cached("$user_module_config_directory/config",
6510 # Export global variables to caller
6511 if ($main::export_to_caller) {
6512 my ($callpkg) = caller();
6513 foreach my $v ('$user_config_directory',
6514 '$user_module_config_directory', '%userconfig') {
6515 my ($vt, $vn) = split('', $v, 2);
6516 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6521 =head2 create_missing_homedir(&uinfo)
6523 If auto homedir creation is enabled, create one for this user if needed.
6524 For internal use only.
6527 sub create_missing_homedir
6530 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6531 # Use has no home dir .. make one
6532 system("mkdir -p ".quotemeta($uinfo->[7]));
6533 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6534 if ($gconfig{'create_homedir_perms'} ne '') {
6535 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6540 =head2 filter_javascript(text)
6542 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6543 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6546 sub filter_javascript
6549 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6550 $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;
6551 $rv =~ s/(javascript:)/x$1/gi;
6552 $rv =~ s/(vbscript:)/x$1/gi;
6556 =head2 resolve_links(path)
6558 Given a path that may contain symbolic links, returns the real path.
6564 $path =~ s/\/+/\//g;
6565 $path =~ s/\/$// if ($path ne "/");
6566 my @p = split(/\/+/, $path);
6568 for(my $i=0; $i<@p; $i++) {
6569 my $sofar = "/".join("/", @p[0..$i]);
6570 my $lnk = readlink($sofar);
6571 if ($lnk eq $sofar) {
6572 # Link to itself! Cannot do anything more really ..
6575 elsif ($lnk =~ /^\//) {
6576 # Link is absolute..
6577 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6581 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6587 =head2 simplify_path(path, bogus)
6589 Given a path, maybe containing elements ".." and "." , convert it to a
6590 clean, absolute form. Returns undef if this is not possible.
6598 my @bits = split(/\/+/, $dir);
6601 foreach my $b (@bits) {
6605 elsif ($b eq "..") {
6607 if (scalar(@fixedbits) == 0) {
6608 # Cannot! Already at root!
6615 push(@fixedbits, $b);
6618 return "/".join('/', @fixedbits);
6621 =head2 same_file(file1, file2)
6623 Returns 1 if two files are actually the same
6628 return 1 if ($_[0] eq $_[1]);
6629 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6630 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6631 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6632 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6633 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6634 return 0 if (!@stat1 || !@stat2);
6635 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6638 =head2 flush_webmin_caches
6640 Clears all in-memory and on-disk caches used by Webmin.
6643 sub flush_webmin_caches
6645 undef(%main::read_file_cache);
6646 undef(%main::acl_hash_cache);
6647 undef(%main::acl_array_cache);
6648 undef(%main::has_command_cache);
6649 undef(@main::list_languages_cache);
6650 undef($main::got_list_usermods_cache);
6651 undef(@main::list_usermods_cache);
6652 undef(%main::foreign_installed_cache);
6653 unlink("$config_directory/module.infos.cache");
6654 &get_all_module_infos();
6657 =head2 list_usermods
6659 Returns a list of additional module restrictions. For internal use in
6665 if (!$main::got_list_usermods_cache) {
6666 @main::list_usermods_cache = ( );
6668 open(USERMODS, "$config_directory/usermin.mods");
6670 if (/^([^:]+):(\+|-|):(.*)/) {
6671 push(@main::list_usermods_cache,
6672 [ $1, $2, [ split(/\s+/, $3) ] ]);
6676 $main::got_list_usermods_cache = 1;
6678 return @main::list_usermods_cache;
6681 =head2 available_usermods(&allmods, &usermods)
6683 Returns a list of modules that are available to the given user, based
6684 on usermod additional/subtractions. For internal use by Usermin only.
6687 sub available_usermods
6689 return @{$_[0]} if (!@{$_[1]});
6691 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6692 my @uinfo = @remote_user_info;
6693 @uinfo = getpwnam($remote_user) if (!@uinfo);
6694 foreach my $u (@{$_[1]}) {
6696 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6699 elsif ($u->[0] =~ /^\@(.*)$/) {
6700 # Check for group membership
6701 my @ginfo = getgrnam($1);
6702 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6703 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6705 elsif ($u->[0] =~ /^\//) {
6706 # Check users and groups in file
6708 open(USERFILE, $u->[0]);
6711 if ($_ eq $remote_user) {
6714 elsif (/^\@(.*)$/) {
6715 my @ginfo = getgrnam($1);
6717 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6718 &indexof($remote_user,
6719 split(/\s+/, $ginfo[3])) >= 0));
6726 if ($u->[1] eq "+") {
6727 map { $mods{$_}++ } @{$u->[2]};
6729 elsif ($u->[1] eq "-") {
6730 map { delete($mods{$_}) } @{$u->[2]};
6734 map { $mods{$_}++ } @{$u->[2]};
6738 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6741 =head2 get_available_module_infos(nocache)
6743 Returns a list of modules available to the current user, based on
6744 operating system support, access control and usermod restrictions. Useful
6745 in themes that need to display a list of modules the user can use.
6746 Each element of the returned array is a hash reference in the same format as
6747 returned by get_module_info.
6750 sub get_available_module_infos
6753 &read_acl(\%acl, \%uacl);
6754 my $risk = $gconfig{'risk_'.$base_remote_user};
6756 foreach my $minfo (&get_all_module_infos($_[0])) {
6757 next if (!&check_os_support($minfo));
6759 # Check module risk level
6760 next if ($risk ne 'high' && $minfo->{'risk'} &&
6761 $minfo->{'risk'} !~ /$risk/);
6765 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6766 !$acl{$base_remote_user,"*"});
6768 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6772 # Check usermod restrictions
6773 my @usermods = &list_usermods();
6774 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6775 &available_usermods(\@rv, \@usermods);
6777 # Check RBAC restrictions
6779 foreach my $m (@rv) {
6780 if (&supports_rbac($m->{'dir'}) &&
6781 &use_rbac_module_acl(undef, $m->{'dir'})) {
6782 local $rbacs = &get_rbac_module_acl($remote_user,
6790 # Module or system doesn't support RBAC
6791 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6797 if (defined(&theme_foreign_available)) {
6798 foreach my $m (@rbacrv) {
6799 if (&theme_foreign_available($m->{'dir'})) {
6808 # Check licence module vetos
6810 if ($main::licence_module) {
6811 foreach my $m (@themerv) {
6812 if (&foreign_call($main::licence_module,
6813 "check_module_licence", $m->{'dir'})) {
6825 =head2 get_visible_module_infos(nocache)
6827 Like get_available_module_infos, but excludes hidden modules from the list.
6828 Each element of the returned array is a hash reference in the same format as
6829 returned by get_module_info.
6832 sub get_visible_module_infos
6835 my $pn = &get_product_name();
6836 return grep { !$_->{'hidden'} &&
6837 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6840 =head2 get_visible_modules_categories(nocache)
6842 Returns a list of Webmin module categories, each of which is a hash ref
6843 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6844 of modules in the category, in the format returned by get_module_info.
6845 Un-used modules are automatically assigned to the 'unused' category, and
6846 those with no category are put into 'others'.
6849 sub get_visible_modules_categories
6852 my @mods = &get_visible_module_infos($nocache);
6854 if (&get_product_name() eq 'webmin') {
6855 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6856 @mods = grep { $_->{'installed'} ne '0' } @mods;
6858 my %cats = &list_categories(\@mods);
6860 foreach my $c (keys %cats) {
6861 my $cat = { 'code' => $c || 'other',
6862 'desc' => $cats{$c} };
6863 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6866 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6867 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6869 # Add un-installed modules in magic category
6870 my $cat = { 'code' => 'unused',
6871 'desc' => $text{'main_unused'},
6873 'modules' => \@unmods };
6879 =head2 is_under_directory(directory, file)
6881 Returns 1 if the given file is under the specified directory, 0 if not.
6882 Symlinks are taken into account in the file to find it's 'real' location.
6885 sub is_under_directory
6887 my ($dir, $file) = @_;
6888 return 1 if ($dir eq "/");
6889 return 0 if ($file =~ /\.\./);
6890 my $ld = &resolve_links($dir);
6892 return &is_under_directory($ld, $file);
6894 my $lp = &resolve_links($file);
6896 return &is_under_directory($dir, $lp);
6898 return 0 if (length($file) < length($dir));
6899 return 1 if ($dir eq $file);
6901 return substr($file, 0, length($dir)) eq $dir;
6904 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6906 Given an absolute URL, returns the host, port, page and ssl flag components.
6907 Relative URLs can also be parsed, if the base information is provided.
6912 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6914 my $ssl = $1 eq 'https';
6915 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6921 elsif ($_[0] =~ /^\/\S*$/) {
6922 # A relative to the server URL
6923 return ($_[1], $_[2], $_[0], $_[4]);
6926 # A relative to the directory URL
6928 $page =~ s/[^\/]+$//;
6929 return ($_[1], $_[2], $page.$_[0], $_[4]);
6933 =head2 check_clicks_function
6935 Returns HTML for a JavaScript function called check_clicks that returns
6936 true when first called, but false subsequently. Useful on onClick for
6937 critical buttons. Deprecated, as this method of preventing duplicate actions
6941 sub check_clicks_function
6946 function check_clicks(form)
6953 for(i=0; i<form.length; i++)
6954 form.elements[i].disabled = true;
6963 =head2 load_entities_map
6965 Returns a hash ref containing mappings between HTML entities (like ouml) and
6966 ascii values (like 246). Mainly for internal use.
6969 sub load_entities_map
6971 if (!%entities_map_cache) {
6973 open(EMAP, "$root_directory/entities_map.txt");
6975 if (/^(\d+)\s+(\S+)/) {
6976 $entities_map_cache{$2} = $1;
6981 return \%entities_map_cache;
6984 =head2 entities_to_ascii(string)
6986 Given a string containing HTML entities like ö and 7, replace them
6987 with their ASCII equivalents.
6990 sub entities_to_ascii
6993 my $emap = &load_entities_map();
6994 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6995 $str =~ s/&#(\d+);/chr($1)/ge;
6999 =head2 get_product_name
7001 Returns either 'webmin' or 'usermin', depending on which program the current
7002 module is in. Useful for modules that can be installed into either.
7005 sub get_product_name
7007 return $gconfig{'product'} if (defined($gconfig{'product'}));
7008 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7013 Returns the character set for the current language, such as iso-8859-1.
7018 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7019 $current_lang_info->{'charset'} ?
7020 $current_lang_info->{'charset'} : $default_charset;
7024 =head2 get_display_hostname
7026 Returns the system's hostname for UI display purposes. This may be different
7027 from the actual hostname if you administrator has configured it so in the
7028 Webmin Configuration module.
7031 sub get_display_hostname
7033 if ($gconfig{'hostnamemode'} == 0) {
7034 return &get_system_hostname();
7036 elsif ($gconfig{'hostnamemode'} == 3) {
7037 return $gconfig{'hostnamedisplay'};
7040 my $h = $ENV{'HTTP_HOST'};
7042 if ($gconfig{'hostnamemode'} == 2) {
7043 $h =~ s/^(www|ftp|mail)\.//i;
7049 =head2 save_module_config([&config], [modulename])
7051 Saves the configuration for some module. The config parameter is an optional
7052 hash reference of names and values to save, which defaults to the global
7053 %config hash. The modulename parameter is the module to update the config
7054 file, which defaults to the current module.
7057 sub save_module_config
7059 my $c = $_[0] || { &get_module_variable('%config') };
7060 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7061 &write_file("$config_directory/$m/config", $c);
7064 =head2 save_user_module_config([&config], [modulename])
7066 Saves the user's Usermin preferences for some module. The config parameter is
7067 an optional hash reference of names and values to save, which defaults to the
7068 global %userconfig hash. The modulename parameter is the module to update the
7069 config file, which defaults to the current module.
7072 sub save_user_module_config
7074 my $c = $_[0] || { &get_module_variable('%userconfig') };
7075 my $m = $_[1] || &get_module_name();
7076 my $ucd = $user_config_directory;
7078 my @uinfo = @remote_user_info ? @remote_user_info
7079 : getpwnam($remote_user);
7080 return if (!@uinfo || !$uinfo[7]);
7081 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7083 &write_file("$ucd/$m/config", $c);
7086 =head2 nice_size(bytes, [min])
7088 Converts a number of bytes into a number followed by a suffix like GB, MB
7089 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7090 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7095 my ($units, $uname);
7096 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7097 $units = 1024*1024*1024*1024;
7100 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7101 $units = 1024*1024*1024;
7104 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7108 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7116 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7118 return $sz." ".$uname;
7121 =head2 get_perl_path
7123 Returns the path to Perl currently in use, such as /usr/bin/perl.
7128 if (open(PERL, "$config_directory/perl-path")) {
7134 return $^X if (-x $^X);
7135 return &has_command("perl");
7138 =head2 get_goto_module([&mods])
7140 Returns the details of a module that the current user should be re-directed
7141 to after logging in, or undef if none. Useful for themes.
7146 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7147 if ($gconfig{'gotomodule'}) {
7148 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7149 return $goto if ($goto);
7151 if (@mods == 1 && $gconfig{'gotoone'}) {
7157 =head2 select_all_link(field, form, [text])
7159 Returns HTML for a 'Select all' link that uses Javascript to select
7160 multiple checkboxes with the same name. The parameters are :
7162 =item field - Name of the checkbox inputs.
7164 =item form - Index of the form on the page.
7166 =item text - Message for the link, defaulting to 'Select all'.
7171 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7172 my ($field, $form, $text) = @_;
7174 $text ||= $text{'ui_selall'};
7175 return "<a class='select_all' href='#' onClick='document.forms[$form].$field.checked = true; for(i=0; i<document.forms[$form].$field.length; i++) { document.forms[$form].${field}[i].checked = true; } return false'>$text</a>";
7178 =head2 select_invert_link(field, form, text)
7180 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7181 selection on multiple checkboxes with the same name. The parameters are :
7183 =item field - Name of the checkbox inputs.
7185 =item form - Index of the form on the page.
7187 =item text - Message for the link, defaulting to 'Invert selection'.
7190 sub select_invert_link
7192 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7193 my ($field, $form, $text) = @_;
7195 $text ||= $text{'ui_selinv'};
7196 return "<a class='select_invert' href='#' onClick='document.forms[$form].$field.checked = !document.forms[$form].$field.checked; for(i=0; i<document.forms[$form].$field.length; i++) { document.forms[$form].${field}[i].checked = !document.forms[$form].${field}[i].checked; } return false'>$text</a>";
7199 =head2 select_rows_link(field, form, text, &rows)
7201 Returns HTML for a link that uses Javascript to select rows with particular
7202 values for their checkboxes. The parameters are :
7204 =item field - Name of the checkbox inputs.
7206 =item form - Index of the form on the page.
7208 =item text - Message for the link, de
7210 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7213 sub select_rows_link
7215 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7216 my ($field, $form, $text, $rows) = @_;
7218 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7219 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7220 $js .= "return false;";
7221 return "<a href='#' onClick='$js'>$text</a>";
7224 =head2 check_pid_file(file)
7226 Given a pid file, returns the PID it contains if the process is running.
7231 open(PIDFILE, $_[0]) || return undef;
7232 my $pid = <PIDFILE>;
7234 $pid =~ /^\s*(\d+)/ || return undef;
7235 kill(0, $1) || return undef;
7241 Return the local os-specific library name to this module. For internal use only.
7246 my $mn = &get_module_name();
7247 my $md = &module_root_directory($mn);
7248 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7249 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7251 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7252 return "$mn-$gconfig{'os_type'}-lib.pl";
7254 elsif (-r "$md/$mn-generic-lib.pl") {
7255 return "$mn-generic-lib.pl";
7262 =head2 module_root_directory(module)
7264 Given a module name, returns its root directory. On a typical Webmin install,
7265 all modules are under the same directory - but it is theoretically possible to
7269 sub module_root_directory
7271 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7272 if (@root_directories > 1) {
7273 foreach my $r (@root_directories) {
7279 return "$root_directories[0]/$d";
7282 =head2 list_mime_types
7284 Returns a list of all known MIME types and their extensions, as a list of hash
7285 references with keys :
7287 =item type - The MIME type, like text/plain.
7289 =item exts - A list of extensions, like .doc and .avi.
7291 =item desc - A human-readable description for the MIME type.
7296 if (!@list_mime_types_cache) {
7298 open(MIME, "$root_directory/mime.types");
7302 if (s/#\s*(.*)$//g) {
7305 my ($type, @exts) = split(/\s+/);
7307 push(@list_mime_types_cache, { 'type' => $type,
7314 return @list_mime_types_cache;
7317 =head2 guess_mime_type(filename, [default])
7319 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7320 The optional default parameter sets a default type of use if none is found,
7321 which defaults to application/octet-stream.
7326 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7328 foreach my $t (&list_mime_types()) {
7329 foreach my $e (@{$t->{'exts'}}) {
7330 return $t->{'type'} if (lc($e) eq lc($ext));
7334 return @_ > 1 ? $_[1] : "application/octet-stream";
7337 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7339 Opens a file handle for writing to a temporary file, which will only be
7340 renamed over the real file when the handle is closed. This allows critical
7341 files like /etc/shadow to be updated safely, even if writing fails part way
7342 through due to lack of disk space. The parameters are :
7344 =item handle - File handle to open, as you would use in Perl's open function.
7346 =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.
7348 =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 $! with the error code.
7350 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7352 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7358 # Just getting a temp file
7359 if (!defined($main::open_tempfiles{$_[0]})) {
7360 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7361 my $dir = $1 || "/";
7362 my $tmp = "$dir/$2.webmintmp.$$";
7363 $main::open_tempfiles{$_[0]} = $tmp;
7364 push(@main::temporary_files, $tmp);
7366 return $main::open_tempfiles{$_[0]};
7370 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7371 $fh = &callers_package($fh);
7373 my %gaccess = &get_module_acl(undef, "");
7374 my $db = $gconfig{'debug_what_write'};
7375 if ($file =~ /\r|\n|\0/) {
7376 if ($noerror) { return 0; }
7377 else { &error("Filename contains invalid characters"); }
7379 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7380 # Read-only mode .. veto all writes
7381 print STDERR "vetoing write to $file\n";
7382 return open($fh, ">$null_file");
7384 elsif ($file =~ /^(>|>>|)nul$/i) {
7385 # Write to Windows null device
7386 &webmin_debug_log($1 eq ">" ? "WRITE" :
7387 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7389 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7390 # Writes to /dev/null or TTYs don't need to be handled
7391 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7392 return open($fh, $file);
7394 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7395 &webmin_debug_log("WRITE", $1) if ($db);
7396 # Over-writing a file, via a temp file
7398 $file = &translate_filename($file);
7400 # Open the link target instead
7401 $file = &resolve_links($file);
7404 # Cannot open a directory!
7405 if ($noerror) { return 0; }
7406 else { &error("Cannot write to directory $file"); }
7408 my $tmp = &open_tempfile($file);
7409 my $ex = open($fh, ">$tmp");
7410 if (!$ex && $! =~ /permission/i) {
7411 # Could not open temp file .. try opening actual file
7413 $ex = open($fh, ">$file");
7414 delete($main::open_tempfiles{$file});
7417 $main::open_temphandles{$fh} = $file;
7420 if (!$ex && !$noerror) {
7421 &error(&text("efileopen", $file, $!));
7425 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7426 # Just writing direct to a file
7427 &webmin_debug_log("WRITE", $1) if ($db);
7429 $file = &translate_filename($file);
7430 my @old_attributes = &get_clear_file_attributes($file);
7431 my $ex = open($fh, ">$file");
7432 &reset_file_attributes($file, \@old_attributes);
7433 $main::open_temphandles{$fh} = $file;
7434 if (!$ex && !$noerror) {
7435 &error(&text("efileopen", $file, $!));
7440 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7441 # Appending to a file .. nothing special to do
7442 &webmin_debug_log("APPEND", $1) if ($db);
7444 $file = &translate_filename($file);
7445 my @old_attributes = &get_clear_file_attributes($file);
7446 my $ex = open($fh, ">>$file");
7447 &reset_file_attributes($file, \@old_attributes);
7448 $main::open_temphandles{$fh} = $file;
7449 if (!$ex && !$noerror) {
7450 &error(&text("efileopen", $file, $!));
7455 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7456 # Read mode .. nothing to do here
7457 &webmin_debug_log("READ", $file) if ($db);
7458 $file = &translate_filename($file);
7459 return open($fh, $file);
7461 elsif ($file eq ">" || $file eq ">>") {
7462 my ($package, $filename, $line) = caller;
7463 if ($noerror) { return 0; }
7464 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7467 my ($package, $filename, $line) = caller;
7468 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7473 =head2 close_tempfile(file|handle)
7475 Copies a temp file to the actual file, assuming that all writes were
7476 successful. The handle must have been one passed to open_tempfile.
7482 my $fh = &callers_package($_[0]);
7484 if (defined($file = $main::open_temphandles{$fh})) {
7486 close($fh) || &error(&text("efileclose", $file, $!));
7487 delete($main::open_temphandles{$fh});
7488 return &close_tempfile($file);
7490 elsif (defined($main::open_tempfiles{$_[0]})) {
7492 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7493 my @st = stat($_[0]);
7494 if (&is_selinux_enabled() && &has_command("chcon")) {
7495 # Set original security context
7496 system("chcon --reference=".quotemeta($_[0]).
7497 " ".quotemeta($main::open_tempfiles{$_[0]}).
7498 " >/dev/null 2>&1");
7500 my @old_attributes = &get_clear_file_attributes($_[0]);
7501 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7503 # Set original permissions and ownership
7504 chmod($st[2], $_[0]);
7505 chown($st[4], $st[5], $_[0]);
7507 &reset_file_attributes($_[0], \@old_attributes);
7508 delete($main::open_tempfiles{$_[0]});
7509 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7510 if ($main::open_templocks{$_[0]}) {
7511 &unlock_file($_[0]);
7512 delete($main::open_templocks{$_[0]});
7517 # Must be closing a handle not associated with a file
7523 =head2 print_tempfile(handle, text, ...)
7525 Like the normal print function, but calls &error on failure. Useful when
7526 combined with open_tempfile, to ensure that a criticial file is never
7527 only partially written.
7532 my ($fh, @args) = @_;
7533 $fh = &callers_package($fh);
7534 (print $fh @args) || &error(&text("efilewrite",
7535 $main::open_temphandles{$fh} || $fh, $!));
7538 =head2 is_selinux_enabled
7540 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7543 sub is_selinux_enabled
7545 if (!defined($main::selinux_enabled_cache)) {
7547 if ($gconfig{'os_type'} !~ /-linux$/) {
7548 # Not on linux, so no way
7549 $main::selinux_enabled_cache = 0;
7551 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7552 # Use global config file
7553 $main::selinux_enabled_cache =
7554 $seconfig{'SELINUX'} eq 'disabled' ||
7555 !$seconfig{'SELINUX'} ? 0 : 1;
7558 # Use selinuxenabled command
7559 #$selinux_enabled_cache =
7560 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7561 $main::selinux_enabled_cache = 0;
7564 return $main::selinux_enabled_cache;
7567 =head2 get_clear_file_attributes(file)
7569 Finds file attributes that may prevent writing, clears them and returns them
7570 as a list. May call error. Mainly for internal use by open_tempfile and
7574 sub get_clear_file_attributes
7578 if ($gconfig{'chattr'}) {
7579 # Get original immutable bit
7580 my $out = &backquote_command(
7581 "lsattr ".quotemeta($file)." 2>/dev/null");
7583 $out =~ s/\s\S+\n//;
7584 @old_attributes = grep { $_ ne '-' } split(//, $out);
7586 if (&indexof("i", @old_attributes) >= 0) {
7587 my $err = &backquote_logged(
7588 "chattr -i ".quotemeta($file)." 2>&1");
7590 &error("Failed to remove immutable bit on ".
7595 return @old_attributes;
7598 =head2 reset_file_attributes(file, &attributes)
7600 Put back cleared attributes on some file. May call error. Mainly for internal
7601 use by close_tempfile.
7604 sub reset_file_attributes
7606 my ($file, $old_attributes) = @_;
7607 if (&indexof("i", @$old_attributes) >= 0) {
7608 my $err = &backquote_logged(
7609 "chattr +i ".quotemeta($file)." 2>&1");
7611 &error("Failed to restore immutable bit on ".
7617 =head2 cleanup_tempnames
7619 Remove all temporary files generated using transname. Typically only called
7620 internally when a Webmin script exits.
7623 sub cleanup_tempnames
7625 foreach my $t (@main::temporary_files) {
7628 @main::temporary_files = ( );
7631 =head2 open_lock_tempfile([handle], file, [no-error])
7633 Returns a temporary file for writing to some actual file, and also locks it.
7634 Effectively the same as calling lock_file and open_tempfile on the same file,
7635 but calls the unlock for you automatically when it is closed.
7638 sub open_lock_tempfile
7640 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7641 $fh = &callers_package($fh);
7642 my $lockfile = $file;
7643 $lockfile =~ s/^[^\/]*//;
7644 if ($lockfile =~ /^\//) {
7645 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7647 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7652 $main::end_exit_status ||= $?;
7653 if ($$ == $main::initial_process_id) {
7654 # Exiting from initial process
7655 &cleanup_tempnames();
7656 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7657 $main::debug_log_start_module eq &get_module_name()) {
7658 my $len = time() - $main::debug_log_start_time;
7659 &webmin_debug_log("STOP", "runtime=$len");
7660 $main::debug_log_start_time = 0;
7662 if (!$ENV{'SCRIPT_NAME'} &&
7663 $main::initial_module_name eq &get_module_name()) {
7664 # In a command-line script - call the real exit, so that the
7665 # exit status gets properly propogated. In some cases this
7666 # was not happening.
7667 exit($main::end_exit_status);
7672 =head2 month_to_number(month)
7674 Converts a month name like feb to a number like 1.
7679 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7682 =head2 number_to_month(number)
7684 Converts a number like 1 to a month name like Feb.
7689 return ucfirst($number_to_month_map{$_[0]});
7692 =head2 get_rbac_module_acl(user, module)
7694 Returns a hash reference of RBAC overrides ACLs for some user and module.
7695 May return undef if none exist (indicating access denied), or the string *
7696 if full access is granted.
7699 sub get_rbac_module_acl
7701 my ($user, $mod) = @_;
7702 eval "use Authen::SolarisRBAC";
7703 return undef if ($@);
7706 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7707 # Automagic webmin.modulename.admin authorization exists .. allow access
7709 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7710 %rv = ( 'noconfig' => 1 );
7717 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7721 my ($auths, $acls) = split(/\s+/, $_);
7722 my @auths = split(/,/, $auths);
7724 my ($merge) = ($acls =~ s/^\+//);
7726 if ($auths eq "*") {
7727 # These ACLs apply to all RBAC users.
7728 # Only if there is some that match a specific authorization
7729 # later will they be used though.
7732 # Check each of the RBAC authorizations
7733 foreach my $a (@auths) {
7734 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7739 $foundany++ if ($gotall);
7742 # Found an RBAC authorization - return the ACLs
7743 return "*" if ($acls eq "*");
7744 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7746 # Just add to current set
7747 foreach my $a (keys %acl) {
7758 return !$foundany ? undef : %rv ? \%rv : undef;
7761 =head2 supports_rbac([module])
7763 Returns 1 if RBAC client support is available, such as on Solaris.
7768 return 0 if ($gconfig{'os_type'} ne 'solaris');
7769 eval "use Authen::SolarisRBAC";
7772 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7777 =head2 use_rbac_module_acl(user, module)
7779 Returns 1 if some user should use RBAC to get permissions for a module
7782 sub use_rbac_module_acl
7784 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7785 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7786 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7787 my %access = &get_module_acl($u, $m, 1);
7788 return $access{'rbac'} ? 1 : 0;
7791 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7793 Runs some command, possibly feeding it input and capturing output to the
7794 give files or scalar references. The parameters are :
7796 =item command - Full command to run, possibly including shell meta-characters.
7798 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7800 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7802 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7804 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7806 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7811 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7812 if (&is_readonly_mode() && !$safe) {
7813 print STDERR "Vetoing command $_[0]\n";
7817 $cmd = &translate_command($cmd);
7819 # Use ` operator where possible
7820 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7821 if (!$stdin && ref($stdout) && !$stderr) {
7822 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7823 $$stdout = `$cmd 2>$null_file`;
7826 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7827 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7828 $$stdout = `$cmd 2>&1`;
7831 elsif (!$stdin && !$stdout && !$stderr) {
7832 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7833 return system("$cmd >$null_file 2>$null_file <$null_file");
7837 $| = 1; # needed on some systems to flush before forking
7838 pipe(EXECSTDINr, EXECSTDINw);
7839 pipe(EXECSTDOUTr, EXECSTDOUTw);
7840 pipe(EXECSTDERRr, EXECSTDERRw);
7842 if (!($pid = fork())) {
7846 open(STDIN, "<&EXECSTDINr");
7847 open(STDOUT, ">&EXECSTDOUTw");
7848 if (ref($stderr) && $stderr eq $stdout) {
7849 open(STDERR, ">&EXECSTDOUTw");
7852 open(STDERR, ">&EXECSTDERRw");
7859 my $fullcmd = "($cmd)";
7860 if ($stdin && !ref($stdin)) {
7861 $fullcmd .= " <$stdin";
7863 if ($stdout && !ref($stdout)) {
7864 $fullcmd .= " >$stdout";
7866 if ($stderr && !ref($stderr)) {
7867 if ($stderr eq $stdout) {
7868 $fullcmd .= " 2>&1";
7871 $fullcmd .= " 2>$stderr";
7874 if ($gconfig{'os_type'} eq 'windows') {
7878 exec("/bin/sh", "-c", $fullcmd);
7880 print "Exec failed : $!\n";
7887 # Feed input and capture output
7889 if ($stdin && ref($stdin)) {
7890 print EXECSTDINw $$stdin;
7893 if ($stdout && ref($stdout)) {
7895 while(<EXECSTDOUTr>) {
7900 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7902 while(<EXECSTDERRr>) {
7913 =head2 open_readfile(handle, file)
7915 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7916 exactly the same as Perl's open function.
7921 my ($fh, $file) = @_;
7922 $fh = &callers_package($fh);
7923 my $realfile = &translate_filename($file);
7924 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7925 return open($fh, "<".$realfile);
7928 =head2 open_execute_command(handle, command, output?, safe?)
7930 Runs some command, with the specified file handle set to either write to it if
7931 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7932 indicates if the command modifies the state of the system or not.
7935 sub open_execute_command
7937 my ($fh, $cmd, $mode, $safe) = @_;
7938 $fh = &callers_package($fh);
7939 my $realcmd = &translate_command($cmd);
7940 if (&is_readonly_mode() && !$safe) {
7941 # Don't actually run it
7942 print STDERR "vetoing command $cmd\n";
7945 return open($fh, ">$null_file");
7948 return open($fh, $null_file);
7952 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7953 if ($gconfig{'debug_what_cmd'});
7955 return open($fh, "| $cmd");
7957 elsif ($mode == 1) {
7958 return open($fh, "$cmd 2>$null_file |");
7960 elsif ($mode == 2) {
7961 return open($fh, "$cmd 2>&1 |");
7965 =head2 translate_filename(filename)
7967 Applies all relevant registered translation functions to a filename. Mostly
7968 for internal use, and typically does nothing.
7971 sub translate_filename
7973 my ($realfile) = @_;
7974 my @funcs = grep { $_->[0] eq &get_module_name() ||
7975 !defined($_->[0]) } @main::filename_callbacks;
7976 foreach my $f (@funcs) {
7978 $realfile = &$func($realfile, @{$f->[2]});
7983 =head2 translate_command(filename)
7985 Applies all relevant registered translation functions to a command. Mostly
7986 for internal use, and typically does nothing.
7989 sub translate_command
7992 my @funcs = grep { $_->[0] eq &get_module_name() ||
7993 !defined($_->[0]) } @main::command_callbacks;
7994 foreach my $f (@funcs) {
7996 $realcmd = &$func($realcmd, @{$f->[2]});
8001 =head2 register_filename_callback(module|undef, &function, &args)
8003 Registers some function to be called when the specified module (or all
8004 modules) tries to open a file for reading and writing. The function must
8005 return the actual file to open. This allows you to override which files
8006 other code actually operates on, via the translate_filename function.
8009 sub register_filename_callback
8011 my ($mod, $func, $args) = @_;
8012 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8015 =head2 register_command_callback(module|undef, &function, &args)
8017 Registers some function to be called when the specified module (or all
8018 modules) tries to execute a command. The function must return the actual
8019 command to run. This allows you to override which commands other other code
8020 actually runs, via the translate_command function.
8023 sub register_command_callback
8025 my ($mod, $func, $args) = @_;
8026 push(@main::command_callbacks, [ $mod, $func, $args ]);
8029 =head2 capture_function_output(&function, arg, ...)
8031 Captures output that some function prints to STDOUT, and returns it. Useful
8032 for functions outside your control that print data when you really want to
8033 manipulate it before output.
8036 sub capture_function_output
8038 my ($func, @args) = @_;
8039 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8040 my $old = select(SOCKET1);
8041 my @rv = &$func(@args);
8050 return wantarray ? ($out, \@rv) : $out;
8053 =head2 capture_function_output_tempfile(&function, arg, ...)
8055 Behaves the same as capture_function_output, but uses a temporary file
8056 to avoid buffer full problems.
8059 sub capture_function_output_tempfile
8061 my ($func, @args) = @_;
8062 my $temp = &transname();
8063 open(BUFFER, ">$temp");
8064 my $old = select(BUFFER);
8065 my @rv = &$func(@args);
8068 my $out = &read_file_contents($temp);
8069 &unlink_file($temp);
8070 return wantarray ? ($out, \@rv) : $out;
8073 =head2 modules_chooser_button(field, multiple, [form])
8075 Returns HTML for a button for selecting one or many Webmin modules.
8076 field - Name of the HTML field to place the module names into.
8077 multiple - Set to 1 if multiple modules can be selected.
8078 form - Index of the form on the page.
8081 sub modules_chooser_button
8083 return &theme_modules_chooser_button(@_)
8084 if (defined(&theme_modules_chooser_button));
8085 my $form = defined($_[2]) ? $_[2] : 0;
8086 my $w = $_[1] ? 700 : 500;
8088 if ($_[1] && $gconfig{'db_sizemodules'}) {
8089 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8091 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8092 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8094 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";
8097 =head2 substitute_template(text, &hash)
8099 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8100 the text replaces it with the value of the hash key foo. Also supports blocks
8101 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8102 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8105 sub substitute_template
8107 # Add some extra fixed parameters to the hash
8108 my %hash = %{$_[1]};
8109 $hash{'hostname'} = &get_system_hostname();
8110 $hash{'webmin_config'} = $config_directory;
8111 $hash{'webmin_etc'} = $config_directory;
8112 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8113 $hash{'webmin_var'} = $var_directory;
8115 # Add time-based parameters, for use in DNS
8116 $hash{'current_time'} = time();
8117 my @tm = localtime($hash{'current_time'});
8118 $hash{'current_year'} = $tm[5]+1900;
8119 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8120 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8121 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8122 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8123 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8125 # Actually do the substition
8127 foreach my $s (keys %hash) {
8128 next if ($s eq ''); # Prevent just $ from being subbed
8131 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8132 $rv =~ s/\$\Q$us\E/$sv/g;
8134 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8135 # and ${IF}..${ENDIF} with value
8136 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8137 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8139 # Replace $IF..$ELSE..$ENDIF block with first value,
8140 # and $IF..$ENDIF with value
8141 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8142 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8144 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8145 # matching, nothing if not
8146 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8147 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8149 # Replace $IFEQ..$ENDIFEQ block with first value if
8150 # matching, nothing if not
8151 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8152 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8155 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8156 # and ${IF}..${ENDIF} with nothing
8157 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8158 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8160 # Replace $IF..$ELSE..$ENDIF block with second value,
8161 # and $IF..$ENDIF with nothing
8162 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8163 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8165 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8166 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8167 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8171 # Now assume any $IF blocks whose variables are not present in the hash
8172 # evaluate to false.
8173 # $IF...$ELSE x $ENDIF => x
8174 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8175 # $IF...x...$ENDIF => (nothing)
8176 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8177 # ${var} => (nothing)
8178 $rv =~ s/\$\{[A-Z]+\}//g;
8183 =head2 running_in_zone
8185 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8186 disable module and features that are not appropriate, like those that modify
8187 mounted filesystems.
8192 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8193 $gconfig{'os_version'} < 10);
8194 my $zn = `zonename 2>$null_file`;
8196 return $zn && $zn ne "global";
8199 =head2 running_in_vserver
8201 Returns 1 if the current Webmin instance is running in a Linux VServer.
8202 Used to disable modules and features that are not appropriate.
8205 sub running_in_vserver
8207 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8210 open(MTAB, "/etc/mtab");
8212 my ($dev, $mp) = split(/\s+/, $_);
8213 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8222 =head2 running_in_xen
8224 Returns 1 if Webmin is running inside a Xen instance, by looking
8225 at /proc/xen/capabilities.
8230 return 0 if (!-r "/proc/xen/capabilities");
8231 my $cap = &read_file_contents("/proc/xen/capabilities");
8232 return $cap =~ /control_d/ ? 0 : 1;
8235 =head2 running_in_openvz
8237 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8238 at /proc/vz/veinfo for a non-zero line.
8241 sub running_in_openvz
8243 return 0 if (!-r "/proc/vz/veinfo");
8244 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8245 return 0 if (!$lref || !@$lref);
8246 foreach my $l (@$lref) {
8248 my @ll = split(/\s+/, $l);
8249 return 0 if ($ll[0] eq '0');
8254 =head2 list_categories(&modules, [include-empty])
8256 Returns a hash mapping category codes to names, including any custom-defined
8257 categories. The modules parameter must be an array ref of module hash objects,
8258 as returned by get_all_module_infos.
8263 my ($mods, $empty) = @_;
8264 my (%cats, %catnames);
8265 &read_file("$config_directory/webmin.catnames", \%catnames);
8266 foreach my $o (@lang_order_list) {
8267 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8272 foreach my $m (@$mods) {
8273 my $c = $m->{'category'};
8274 next if ($cats{$c});
8275 if (defined($catnames{$c})) {
8276 $cats{$c} = $catnames{$c};
8278 elsif ($text{"category_$c"}) {
8279 $cats{$c} = $text{"category_$c"};
8282 # try to get category name from module ..
8283 my %mtext = &load_language($m->{'dir'});
8284 if ($mtext{"category_$c"}) {
8285 $cats{$c} = $mtext{"category_$c"};
8288 $c = $m->{'category'} = "";
8289 $cats{$c} = $text{"category_$c"};
8296 =head2 is_readonly_mode
8298 Returns 1 if the current user is in read-only mode, and thus all writes
8299 to files and command execution should fail.
8302 sub is_readonly_mode
8304 if (!defined($main::readonly_mode_cache)) {
8305 my %gaccess = &get_module_acl(undef, "");
8306 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8308 return $main::readonly_mode_cache;
8311 =head2 command_as_user(user, with-env?, command, ...)
8313 Returns a command to execute some command as the given user, using the
8314 su statement. If on Linux, the /bin/sh shell is forced in case the user
8315 does not have a valid shell. If with-env is set to 1, the -s flag is added
8316 to the su command to read the user's .profile or .bashrc file.
8321 my ($user, $env, @args) = @_;
8322 my @uinfo = getpwnam($user);
8323 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8324 # User shell doesn't appear to be valid
8325 if ($gconfig{'os_type'} =~ /-linux$/) {
8326 # Use -s /bin/sh to force it
8327 $shellarg = " -s /bin/sh";
8329 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8330 $gconfig{'os_type'} eq 'solaris' &&
8331 $gconfig{'os_version'} >= 11 ||
8332 $gconfig{'os_type'} eq 'macos') {
8333 # Use -m and force /bin/sh
8334 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8338 my $rv = "su".($env ? " -" : "").$shellarg.
8339 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8343 =head2 list_osdn_mirrors(project, file)
8345 This function is now deprecated in favor of letting sourceforge just
8346 redirect to the best mirror, and now just returns their primary download URL.
8349 sub list_osdn_mirrors
8351 my ($project, $file) = @_;
8352 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8354 'mirror' => 'downloads' } );
8357 =head2 convert_osdn_url(url)
8359 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8360 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8361 to a real URL on the sourceforge download redirector.
8364 sub convert_osdn_url
8367 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8368 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8369 # Always use the Sourceforge mail download URL, which does
8370 # a location-based redirect for us
8371 my ($project, $file) = ($1, $2);
8372 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8374 return wantarray ? ( $url, 0 ) : $url;
8377 # Some other source .. don't change
8378 return wantarray ? ( $url, 2 ) : $url;
8382 =head2 get_current_dir
8384 Returns the directory the current process is running in.
8390 if ($gconfig{'os_type'} eq 'windows') {
8403 =head2 supports_users
8405 Returns 1 if the current OS supports Unix user concepts and functions like
8406 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8412 return $gconfig{'os_type'} ne 'windows';
8415 =head2 supports_symlinks
8417 Returns 1 if the current OS supports symbolic and hard links. This will not
8418 be the case on Windows.
8421 sub supports_symlinks
8423 return $gconfig{'os_type'} ne 'windows';
8426 =head2 quote_path(path)
8428 Returns a path with safe quoting for the current operating system.
8434 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8435 # Windows only supports "" style quoting
8439 return quotemeta($path);
8443 =head2 get_windows_root
8445 Returns the base windows system directory, like c:/windows.
8448 sub get_windows_root
8450 if ($ENV{'SystemRoot'}) {
8451 my $rv = $ENV{'SystemRoot'};
8456 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8460 =head2 read_file_contents(file)
8462 Given a filename, returns its complete contents as a string. Effectively
8463 the same as the Perl construct `cat file`.
8466 sub read_file_contents
8468 &open_readfile(FILE, $_[0]) || return undef;
8475 =head2 unix_crypt(password, salt)
8477 Performs Unix encryption on a password, using the built-in crypt function or
8478 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8479 must be either an already-hashed password, or a two-character alpha-numeric
8485 my ($pass, $salt) = @_;
8486 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8487 my $rv = eval "crypt(\$pass, \$salt)";
8489 return $rv if ($rv && !$@);
8490 eval "use Crypt::UnixCrypt";
8492 return Crypt::UnixCrypt::crypt($pass, $salt);
8495 &error("Failed to encrypt password : $err");
8499 =head2 split_quoted_string(string)
8501 Given a string like I<foo "bar baz" quux>, returns the array :
8505 sub split_quoted_string
8509 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8510 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8511 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8518 =head2 write_to_http_cache(url, file|&data)
8520 Updates the Webmin cache with the contents of the given file, possibly also
8521 clearing out old data. Mainly for internal use by http_download.
8524 sub write_to_http_cache
8526 my ($url, $file) = @_;
8527 return 0 if (!$gconfig{'cache_size'});
8529 # Don't cache downloads that look dynamic
8530 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8534 # Check if the current module should do caching
8535 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8536 # Caching all except some modules
8537 my @mods = split(/\s+/, $1);
8538 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8540 elsif ($gconfig{'cache_mods'}) {
8541 # Only caching some modules
8542 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8543 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8549 $size = length($$file);
8552 my @st = stat($file);
8556 if ($size > $gconfig{'cache_size'}) {
8557 # Bigger than the whole cache - so don't save it
8562 $cfile = "$main::http_cache_directory/$cfile";
8564 # See how much we have cached currently, clearing old files
8566 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8567 opendir(CACHEDIR, $main::http_cache_directory);
8568 foreach my $f (readdir(CACHEDIR)) {
8569 next if ($f eq "." || $f eq "..");
8570 my $path = "$main::http_cache_directory/$f";
8571 my @st = stat($path);
8572 if ($gconfig{'cache_days'} &&
8573 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8574 # This file is too old .. trash it
8579 push(@cached, [ $path, $st[7], $st[9] ]);
8583 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8584 while($total+$size > $gconfig{'cache_size'} && @cached) {
8585 # Cache is too big .. delete some files until the new one will fit
8586 unlink($cached[0]->[0]);
8587 $total -= $cached[0]->[1];
8591 # Finally, write out the new file
8593 &open_tempfile(CACHEFILE, ">$cfile");
8594 &print_tempfile(CACHEFILE, $$file);
8595 &close_tempfile(CACHEFILE);
8598 my ($ok, $err) = ©_source_dest($file, $cfile);
8604 =head2 check_in_http_cache(url)
8606 If some URL is in the cache and valid, return the filename for it. Mainly
8607 for internal use by http_download.
8610 sub check_in_http_cache
8613 return undef if (!$gconfig{'cache_size'});
8615 # Check if the current module should do caching
8616 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8617 # Caching all except some modules
8618 my @mods = split(/\s+/, $1);
8619 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8621 elsif ($gconfig{'cache_mods'}) {
8622 # Only caching some modules
8623 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8624 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8629 $cfile = "$main::http_cache_directory/$cfile";
8630 my @st = stat($cfile);
8631 return undef if (!@st || !$st[7]);
8632 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8637 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8642 =head2 supports_javascript
8644 Returns 1 if the current browser is assumed to support javascript.
8647 sub supports_javascript
8649 if (defined(&theme_supports_javascript)) {
8650 return &theme_supports_javascript();
8652 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8655 =head2 get_module_name
8657 Returns the name of the Webmin module that called this function. For internal
8658 use only by other API functions.
8663 return &get_module_variable('$module_name');
8666 =head2 get_module_variable(name, [ref])
8668 Returns the value of some variable which is set in the caller's context, if
8669 using the new WebminCore package. For internal use only.
8672 sub get_module_variable
8674 my ($v, $wantref) = @_;
8675 my $slash = $wantref ? "\\" : "";
8676 my $thispkg = &web_libs_package();
8677 if ($thispkg eq 'WebminCore') {
8678 my ($vt, $vn) = split('', $v, 2);
8680 for(my $i=0; ($callpkg) = caller($i); $i++) {
8681 last if ($callpkg ne $thispkg);
8683 return eval "${slash}${vt}${callpkg}::${vn}";
8685 return eval "${slash}${v}";
8688 =head2 clear_time_locale()
8690 Temporarily force the locale to C, until reset_time_locale is called. This is
8691 useful if your code is going to call C<strftime> from the POSIX package, and
8692 you want to ensure that the output is in a consistent format.
8695 sub clear_time_locale
8697 if ($main::clear_time_locale_count == 0) {
8700 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8701 POSIX::setlocale(POSIX::LC_TIME, "C");
8704 $main::clear_time_locale_count++;
8707 =head2 reset_time_locale()
8709 Revert the locale to whatever it was before clear_time_locale was called
8712 sub reset_time_locale
8714 if ($main::clear_time_locale_count == 1) {
8716 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8717 $main::clear_time_locale_old = undef;
8720 $main::clear_time_locale_count--;
8723 =head2 callers_package(filehandle)
8725 Convert a non-module filehandle like FOO to one qualified with the
8726 caller's caller's package, like fsdump::FOO. For internal use only.
8732 my $callpkg = (caller(1))[0];
8733 my $thispkg = &web_libs_package();
8734 if (!ref($fh) && $fh !~ /::/ &&
8735 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8736 $fh = $callpkg."::".$fh;
8741 =head2 web_libs_package()
8743 Returns the package this code is in. We can't always trust __PACKAGE__. For
8747 sub web_libs_package
8749 if ($called_from_webmin_core) {
8750 return "WebminCore";
8755 =head2 get_userdb_string
8757 Returns the URL-style string for connecting to the users and groups database
8760 sub get_userdb_string
8763 &get_miniserv_config(\%miniserv);
8764 return $miniserv{'userdb'};
8767 =head2 connect_userdb(string)
8769 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
8770 On failure returns an error message string. In an array context, returns the
8777 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
8778 if ($proto eq "mysql") {
8779 # Connect to MySQL with DBI
8780 my $drh = eval "use DBI; DBI->install_driver('mysql');";
8781 $drh || return $text{'sql_emysqldriver'};
8782 my ($host, $port) = split(/:/, $host);
8783 my $cstr = "database=$prefix;host=$host";
8784 $cstr .= ";port=$port" if ($port);
8785 my $dbh = $drh->connect($cstr, $user, $pass, { });
8786 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
8787 return wantarray ? ($dbh, $proto) : $dbh;
8789 elsif ($proto eq "postgresql") {
8790 # Connect to PostgreSQL with DBI
8791 my $drh = eval "use DBI; DBI->install_driver('Pg');";
8792 $drh || return $text{'sql_epostgresqldriver'};
8793 my ($host, $port) = split(/:/, $host);
8794 my $cstr = "dbname=$prefix;host=$host";
8795 $cstr .= ";port=$port" if ($port);
8796 my $dbh = $drh->connect($cstr, $user, $pass);
8797 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
8798 return wantarray ? ($dbh, $proto) : $dbh;
8800 elsif ($proto eq "ldap") {
8802 return "LDAP not done yet";
8805 return "Unknown protocol $proto";
8809 =head2 disconnect_userdb(string, &handle)
8811 Closes a handle opened by connect_userdb
8814 sub disconnect_userdb
8817 if ($str =~ /^(mysql|postgresql):/) {
8821 elsif ($str =~ /^ldap:/) {
8827 =head2 split_userdb_string(string)
8829 Converts a string like mysql://user:pass@host/db into separate parts
8832 sub split_userdb_string
8835 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
8836 my ($proto, $user, $pass, $host, $prefix, $argstr) =
8837 ($1, $2, $3, $4, $5, $7);
8838 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
8839 return ($proto, $user, $pass, $host, $prefix, \%args);
8844 $done_web_lib_funcs = 1;