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) {
1705 open(ACL, &acl_filename());
1707 if (/^([^:]+):\s*(.*)/) {
1709 my @mods = split(/\s+/, $2);
1710 foreach my $m (@mods) {
1711 $main::acl_hash_cache{$user,$m}++;
1713 $main::acl_array_cache{$user} = \@mods;
1718 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1719 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1724 Returns the file containing the webmin ACL, which is usually
1725 /etc/webmin/webmin.acl.
1730 return "$config_directory/webmin.acl";
1735 Does nothing, but kept around for compatability.
1742 =head2 get_miniserv_config(&hash)
1744 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1745 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1749 sub get_miniserv_config
1751 return &read_file_cached(
1752 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1755 =head2 put_miniserv_config(&hash)
1757 Writes out the Webmin webserver configuration file from the contents of
1758 the given hash ref. This should be initially populated by get_miniserv_config,
1761 get_miniserv_config(\%miniserv);
1762 $miniserv{'port'} = 10005;
1763 put_miniserv_config(\%miniserv);
1767 sub put_miniserv_config
1769 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1773 =head2 restart_miniserv([nowait])
1775 Kill the old miniserv process and re-start it, then optionally waits for
1776 it to restart. This will apply all configuration settings.
1779 sub restart_miniserv
1782 return undef if (&is_readonly_mode());
1784 &get_miniserv_config(\%miniserv) || return;
1787 if ($gconfig{'os_type'} ne 'windows') {
1788 # On Unix systems, we can restart with a signal
1789 my ($pid, $addr, $i);
1790 $miniserv{'inetd'} && return;
1791 my @oldst = stat($miniserv{'pidfile'});
1792 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1795 if (!$pid) { &error("Invalid PID file"); }
1797 # Just signal miniserv to restart
1798 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1800 # Wait till new PID is written, indicating a restart
1801 for($i=0; $i<60; $i++) {
1803 my @newst = stat($miniserv{'pidfile'});
1804 last if ($newst[9] != $oldst[9]);
1806 $i < 60 || &error("Webmin server did not write new PID file");
1808 ## Totally kill the process and re-run it
1809 #$SIG{'TERM'} = 'IGNORE';
1810 #&kill_logged('TERM', $pid);
1811 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1814 # On Windows, we need to use the flag file
1815 open(TOUCH, ">$miniserv{'restartflag'}");
1820 # wait for miniserv to come back up
1821 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1823 for($i=0; $i<20; $i++) {
1825 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1826 my $rv = connect(STEST,
1827 pack_sockaddr_in($miniserv{'port'}, $addr));
1829 last if ($rv && ++$ok >= 2);
1831 $i < 20 || &error("Failed to restart Webmin server!");
1835 =head2 reload_miniserv
1837 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1838 configuration files. Not all changes will be applied though, such as the
1839 IP addresses and ports to accept connections on.
1844 return undef if (&is_readonly_mode());
1846 &get_miniserv_config(\%miniserv) || return;
1848 if ($gconfig{'os_type'} ne 'windows') {
1849 # Send a USR1 signal to re-read the config
1850 my ($pid, $addr, $i);
1851 $miniserv{'inetd'} && return;
1852 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1855 if (!$pid) { &error("Invalid PID file"); }
1856 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1858 # Make sure this didn't kill Webmin!
1860 if (!kill(0, $pid)) {
1861 print STDERR "USR1 signal killed Webmin - restarting\n";
1862 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1866 # On Windows, we need to use the flag file
1867 open(TOUCH, ">$miniserv{'reloadflag'}");
1872 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1874 Returns 1 if some module is supported on the current operating system, or the
1875 OS supplies as parameters. The parameters are :
1877 =item minfo - A hash ref of module information, as returned by get_module_info
1879 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1881 =item os-version - The Webmin OS version to use, such as 13.0
1883 =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.
1886 sub check_os_support
1888 my $oss = $_[0]->{'os_support'};
1889 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1890 # May provide usable API
1891 $oss .= " ".$_[0]->{'api_os_support'};
1893 if ($_[0]->{'nozone'} && &running_in_zone()) {
1894 # Not supported in a Solaris Zone
1897 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1898 # Not supported in a Linux Vserver
1901 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1902 # Not supported in an OpenVZ container
1905 return 1 if (!$oss || $oss eq '*');
1906 my $osver = $_[2] || $gconfig{'os_version'};
1907 my $ostype = $_[1] || $gconfig{'os_type'};
1910 my ($os, $ver, $codes);
1911 my ($neg) = ($oss =~ s/^!//); # starts with !
1912 $anyneg++ if ($neg);
1913 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1915 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1917 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1919 $os = $1; $ver = $2; $oss = $3;
1921 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1923 $os = $1; $codes = $2; $oss = $3;
1925 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1927 $codes = $1; $oss = $2;
1929 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1931 $os = $1; $oss = $2;
1934 next if ($os && !($os eq $ostype ||
1935 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1936 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1937 next if ($osver < $1 || $osver > $2);
1939 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1940 next if ($osver < $1);
1942 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1943 next if ($osver > $1);
1946 next if ($ver ne $osver);
1948 next if ($codes && !eval $codes);
1954 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1956 Downloads data from a HTTP url to a local file or string. The parameters are :
1958 =item host - The hostname part of the URL, such as www.google.com
1960 =item port - The HTTP port number, such as 80
1962 =item page - The filename part of the URL, like /index.html
1964 =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.
1966 =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.
1968 =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.
1970 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
1972 =item user - If set, HTTP authentication is done with this username.
1974 =item pass - The HTTP password to use with the username above.
1976 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
1978 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
1980 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
1982 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
1987 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
1988 $timeout, $osdn, $nocache, $headers) = @_;
1989 if ($gconfig{'debug_what_net'}) {
1990 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
1991 ($user ? " user=$user pass=$pass" : "").
1992 (ref($dest) ? "" : " dest=$dest"));
1995 # Convert OSDN URL first
1996 my $prot = $ssl ? "https://" : "http://";
1997 my $portstr = $ssl && $port == 443 ||
1998 !$ssl && $port == 80 ? "" : ":$port";
1999 ($host, $port, $page, $ssl) = &parse_http_url(
2000 &convert_osdn_url($prot.$host.$portstr.$page));
2003 # Check if we already have cached the URL
2004 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2005 my $cfile = &check_in_http_cache($url);
2006 if ($cfile && !$nocache) {
2007 # Yes! Copy to dest file or variable
2008 &$cbfunc(6, $url) if ($cbfunc);
2010 &open_readfile(CACHEFILE, $cfile);
2012 $$dest = <CACHEFILE>;
2016 ©_source_dest($cfile, $dest);
2023 push(@headers, [ "Host", $host ]);
2024 push(@headers, [ "User-agent", "Webmin" ]);
2025 push(@headers, [ "Accept-language", "en" ]);
2027 my $auth = &encode_base64("$user:$pass");
2028 $auth =~ tr/\r\n//d;
2029 push(@headers, [ "Authorization", "Basic $auth" ]);
2031 foreach my $hname (keys %$headers) {
2032 push(@headers, [ $hname, $headers->{$hname} ]);
2035 # Actually download it
2036 $main::download_timed_out = undef;
2037 local $SIG{ALRM} = \&download_timeout;
2038 alarm($timeout || 60);
2039 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2041 $h = $main::download_timed_out if ($main::download_timed_out);
2043 if ($error) { $$error = $h; return; }
2044 else { &error($h); }
2046 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2047 $headers, $ssl, $nocache);
2048 if ((!$error || !$$error) && !$nocache) {
2049 &write_to_http_cache($url, $dest);
2053 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2055 Do a HTTP download, after the headers have been sent. For internal use only,
2056 typically called by http_download.
2059 sub complete_http_download
2061 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2067 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2068 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2070 if ($_[2]) { ${$_[2]} = $line; return; }
2071 else { &error("Download failed : $line"); }
2074 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2077 $line = &read_http_connection($_[0]);
2078 $line =~ tr/\r\n//d;
2079 $line =~ /^(\S+):\s+(.*)$/ || last;
2080 $header{lc($1)} = $2;
2081 push(@headers, [ lc($1), $2 ]);
2084 if ($main::download_timed_out) {
2085 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2086 else { &error($main::download_timed_out); }
2088 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2089 if ($rcode >= 300 && $rcode < 400) {
2090 # follow the redirect
2091 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2092 my ($host, $port, $page, $ssl);
2093 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2094 $ssl = $1 eq 'https' ? 1 : 0;
2095 $host = $2; $port = $3; $page = $4 || "/";
2097 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2098 $ssl = $1 eq 'https' ? 1 : 0;
2099 $host = $2; $port = 80; $page = $3 || "/";
2101 elsif ($header{'location'} =~ /^\// && $_[5]) {
2102 # Relative to same server
2106 $page = $header{'location'};
2108 elsif ($header{'location'}) {
2109 # Assume relative to same dir .. not handled
2110 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2111 else { &error("Invalid Location header $header{'location'}"); }
2114 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2115 else { &error("Missing Location header"); }
2118 ($page, $params) = split(/\?/, $page);
2120 $page .= "?".$params if (defined($params));
2121 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2122 undef, undef, undef, $_[4], $_[9], $_[7]);
2127 # Append to a variable
2128 while(defined($buf = &read_http_connection($_[0], 1024))) {
2130 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2136 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2137 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2138 else { &error("Failed to write to $_[1] : $!"); }
2140 binmode(PFILE); # For windows
2141 while(defined($buf = &read_http_connection($_[0], 1024))) {
2142 &print_tempfile(PFILE, $buf);
2143 $got += length($buf);
2144 &$cbfunc(3, $got) if ($cbfunc);
2146 &close_tempfile(PFILE);
2147 if ($header{'content-length'} &&
2148 $got != $header{'content-length'}) {
2149 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2150 else { &error("Download incomplete"); }
2153 &$cbfunc(4) if ($cbfunc);
2155 &close_http_connection($_[0]);
2159 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2161 Download data from an FTP site to a local file. The parameters are :
2163 =item host - FTP server hostname
2165 =item file - File on the FTP server to download
2167 =item destfile - File on the Webmin system to download data to
2169 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2171 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2173 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2175 =item pass - Password for the username above.
2177 =item port - FTP server port number, which defaults to 21 if not set.
2182 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2184 if ($gconfig{'debug_what_net'}) {
2185 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2186 ($user ? " user=$user pass=$pass" : "").
2187 (ref($dest) ? "" : " dest=$dest"));
2191 if (&is_readonly_mode()) {
2192 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2194 else { &error("FTP connections not allowed in readonly mode"); }
2197 # Check if we already have cached the URL
2198 my $url = "ftp://".$host.$file;
2199 my $cfile = &check_in_http_cache($url);
2201 # Yes! Copy to dest file or variable
2202 &$cbfunc(6, $url) if ($cbfunc);
2204 &open_readfile(CACHEFILE, $cfile);
2206 $$dest = <CACHEFILE>;
2210 ©_source_dest($cfile, $dest);
2215 # Actually download it
2216 $main::download_timed_out = undef;
2217 local $SIG{ALRM} = \&download_timeout;
2220 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2221 # download through http-style proxy
2223 if (&open_socket($1, $2, "SOCK", \$error)) {
2225 if ($main::download_timed_out) {
2227 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2228 else { &error($main::download_timed_out); }
2230 my $esc = $_[1]; $esc =~ s/ /%20/g;
2231 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2232 my $portstr = $port == 21 ? "" : ":$port";
2233 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2234 print SOCK "User-agent: Webmin\r\n";
2235 if ($gconfig{'proxy_user'}) {
2236 my $auth = &encode_base64(
2237 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2238 $auth =~ tr/\r\n//d;
2239 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2242 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2245 elsif (!$gconfig{'proxy_fallback'}) {
2247 if ($error) { $$error = $main::download_timed_out; return 0; }
2248 else { &error($main::download_timed_out); }
2253 # connect to host and login with real FTP protocol
2254 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2256 if ($main::download_timed_out) {
2257 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2258 else { &error($main::download_timed_out); }
2260 &ftp_command("", 2, $_[3]) || return 0;
2262 # Login as supplied user
2263 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2265 if (int($urv[1]/100) == 3) {
2266 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2270 # Login as anonymous
2271 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2273 if (int($urv[1]/100) == 3) {
2274 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2278 &$cbfunc(1, 0) if ($cbfunc);
2281 # get the file size and tell the callback
2282 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2283 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2284 defined($size) || return 0;
2286 &$cbfunc(2, int($size));
2290 my $pasv = &ftp_command("PASV", 2, $_[3]);
2291 defined($pasv) || return 0;
2292 $pasv =~ /\(([0-9,]+)\)/;
2293 @n = split(/,/ , $1);
2294 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2295 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2296 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2300 &open_tempfile(PFILE, ">$_[2]", 1);
2301 while(read(CON, $buf, 1024) > 0) {
2302 &print_tempfile(PFILE, $buf);
2303 $got += length($buf);
2304 &$cbfunc(3, $got) if ($cbfunc);
2306 &close_tempfile(PFILE);
2308 if ($got != $size) {
2309 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2310 else { &error("Download incomplete"); }
2312 &$cbfunc(4) if ($cbfunc);
2314 &ftp_command("", 2, $_[3]) || return 0;
2318 &ftp_command("QUIT", 2, $_[3]) || return 0;
2322 &write_to_http_cache($url, $dest);
2326 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2328 Upload data from a local file to an FTP site. The parameters are :
2330 =item host - FTP server hostname
2332 =item file - File on the FTP server to write to
2334 =item srcfile - File on the Webmin system to upload data from
2336 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2338 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2340 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2342 =item pass - Password for the username above.
2344 =item port - FTP server port number, which defaults to 21 if not set.
2351 if (&is_readonly_mode()) {
2352 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2354 else { &error("FTP connections not allowed in readonly mode"); }
2357 $main::download_timed_out = undef;
2358 local $SIG{ALRM} = \&download_timeout;
2361 # connect to host and login
2362 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2364 if ($main::download_timed_out) {
2365 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2366 else { &error($main::download_timed_out); }
2368 &ftp_command("", 2, $_[3]) || return 0;
2370 # Login as supplied user
2371 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2373 if (int($urv[1]/100) == 3) {
2374 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2378 # Login as anonymous
2379 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2381 if (int($urv[1]/100) == 3) {
2382 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2386 &$cbfunc(1, 0) if ($cbfunc);
2388 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2390 # get the file size and tell the callback
2391 my @st = stat($_[2]);
2393 &$cbfunc(2, $st[7]);
2397 my $pasv = &ftp_command("PASV", 2, $_[3]);
2398 defined($pasv) || return 0;
2399 $pasv =~ /\(([0-9,]+)\)/;
2400 @n = split(/,/ , $1);
2401 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2402 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2407 while(read(PFILE, $buf, 1024) > 0) {
2409 $got += length($buf);
2410 &$cbfunc(3, $got) if ($cbfunc);
2414 if ($got != $st[7]) {
2415 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2416 else { &error("Upload incomplete"); }
2418 &$cbfunc(4) if ($cbfunc);
2421 &ftp_command("", 2, $_[3]) || return 0;
2422 &ftp_command("QUIT", 2, $_[3]) || return 0;
2428 =head2 no_proxy(host)
2430 Checks if some host is on the no proxy list. For internal use by the
2431 http_download and ftp_download functions.
2436 my $ip = &to_ipaddress($_[0]);
2437 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2438 return 1 if ($_[0] =~ /\Q$n\E/ ||
2444 =head2 open_socket(host, port, handle, [&error])
2446 Open a TCP connection to some host and port, using a file handle. The
2449 =item host - Hostname or IP address to connect to.
2451 =item port - TCP port number.
2453 =item handle - A file handle name to use for the connection.
2455 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2460 my ($host, $port, $fh, $err) = @_;
2461 $fh = &callers_package($fh);
2463 if ($gconfig{'debug_what_net'}) {
2464 &webmin_debug_log('TCP', "host=$host port=$port");
2466 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2467 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2468 else { &error("Failed to create socket : $!"); }
2471 if (!($addr = inet_aton($host))) {
2472 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2473 else { &error("Failed to lookup IP address for $host"); }
2475 if ($gconfig{'bind_proxy'}) {
2476 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2477 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2478 else { &error("Failed to bind to source address : $!"); }
2481 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2482 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2483 else { &error("Failed to connect to $host:$port : $!"); }
2485 my $old = select($fh); $| =1; select($old);
2489 =head2 download_timeout
2491 Called when a download times out. For internal use only.
2494 sub download_timeout
2496 $main::download_timed_out = "Download timed out";
2499 =head2 ftp_command(command, expected, [&error], [filehandle])
2501 Send an FTP command, and die if the reply is not what was expected. Mainly
2502 for internal use by the ftp_download and ftp_upload functions.
2507 my ($cmd, $expect, $err, $fh) = @_;
2509 $fh = &callers_package($fh);
2512 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2514 print $fh "$cmd\r\n";
2517 if (!($line = <$fh>)) {
2519 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2520 else { &error("Failed to read reply to $what"); }
2522 $line =~ /^(...)(.)(.*)$/;
2525 foreach my $c (@$expect) {
2526 $found++ if (int($1/100) == $c);
2530 $found++ if (int($1/100) == $_[1]);
2534 if ($err) { $$err = "$what failed : $3"; return undef; }
2535 else { &error("$what failed : $3"); }
2540 # Need to skip extra stuff..
2542 if (!($line = <$fh>)) {
2544 if ($$err) { $$err = "Failed to read reply to $what";
2546 else { &error("Failed to read reply to $what"); }
2548 $line =~ /^(....)(.*)$/; $reply .= $2;
2549 if ($1 eq "$rcode ") { last; }
2553 return wantarray ? ($reply, $rcode) : $reply;
2556 =head2 to_ipaddress(hostname)
2558 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2559 it cannot be resolved.
2564 if (&check_ipaddress($_[0])) {
2568 my $hn = gethostbyname($_[0]);
2569 return undef if (!$hn);
2570 local @ip = unpack("CCCC", $hn);
2571 return join("." , @ip);
2575 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2577 Renders a 4-column table of icons. The useful parameters are :
2579 =item links - An array ref of link destination URLs for the icons.
2581 =item titles - An array ref of titles to appear under the icons.
2583 =item icons - An array ref of URLs for icon images.
2585 =item columns - Number of columns to layout the icons with. Defaults to 4.
2590 &load_theme_library();
2591 if (defined(&theme_icons_table)) {
2592 &theme_icons_table(@_);
2596 my $cols = $_[3] ? $_[3] : 4;
2597 my $per = int(100.0 / $cols);
2598 print "<table class='icons_table' width=100% cellpadding=5>\n";
2599 for(my $i=0; $i<@{$_[0]}; $i++) {
2600 if ($i%$cols == 0) { print "<tr>\n"; }
2601 print "<td width=$per% align=center valign=top>\n";
2602 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2603 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2604 $_[7]->[$i], $_[8]->[$i]);
2606 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2608 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2609 print "</tr>\n" if ($need_tr);
2613 =head2 replace_file_line(file, line, [newline]*)
2615 Replaces one line in some file with 0 or more new lines. The parameters are :
2617 =item file - Full path to some file, like /etc/hosts.
2619 =item line - Line number to replace, starting from 0.
2621 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2624 sub replace_file_line
2627 my $realfile = &translate_filename($_[0]);
2628 open(FILE, $realfile);
2631 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2632 else { splice(@lines, $_[1], 1); }
2633 &open_tempfile(FILE, ">$realfile");
2634 &print_tempfile(FILE, @lines);
2635 &close_tempfile(FILE);
2638 =head2 read_file_lines(file, [readonly])
2640 Returns a reference to an array containing the lines from some file. This
2641 array can be modified, and will be written out when flush_file_lines()
2642 is called. The parameters are :
2644 =item file - Full path to the file to read.
2646 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2650 $lref = read_file_lines("/etc/hosts");
2651 push(@$lref, "127.0.0.1 localhost");
2652 flush_file_lines("/etc/hosts");
2658 my ($package, $filename, $line) = caller;
2659 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2661 my $realfile = &translate_filename($_[0]);
2662 if (!$main::file_cache{$realfile}) {
2665 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2666 open(READFILE, $realfile);
2669 $eol = /\r\n$/ ? "\r\n" : "\n";
2675 $main::file_cache{$realfile} = \@lines;
2676 $main::file_cache_noflush{$realfile} = $_[1];
2677 $main::file_cache_eol{$realfile} = $eol || "\n";
2680 # Make read-write if currently readonly
2682 $main::file_cache_noflush{$realfile} = 0;
2685 return $main::file_cache{$realfile};
2688 =head2 flush_file_lines([file], [eol])
2690 Write out to a file previously read by read_file_lines to disk (except
2691 for those marked readonly). The parameters are :
2693 =item file - The file to flush out.
2695 =item eof - End-of-line character for each line. Defaults to \n.
2698 sub flush_file_lines
2702 local $trans = &translate_filename($_[0]);
2703 $main::file_cache{$trans} ||
2704 &error("flush_file_lines called on non-loaded file $trans");
2705 push(@files, $trans);
2708 @files = ( keys %main::file_cache );
2710 foreach my $f (@files) {
2711 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2712 if (!$main::file_cache_noflush{$f}) {
2713 no warnings; # XXX Bareword file handles should go away
2714 &open_tempfile(FLUSHFILE, ">$f");
2715 foreach my $line (@{$main::file_cache{$f}}) {
2716 (print FLUSHFILE $line,$eol) ||
2717 &error(&text("efilewrite", $f, $!));
2719 &close_tempfile(FLUSHFILE);
2721 delete($main::file_cache{$f});
2722 delete($main::file_cache_noflush{$f});
2726 =head2 unflush_file_lines(file)
2728 Clear the internal cache of some given file, previously read by read_file_lines.
2731 sub unflush_file_lines
2733 my $realfile = &translate_filename($_[0]);
2734 delete($main::file_cache{$realfile});
2735 delete($main::file_cache_noflush{$realfile});
2738 =head2 unix_user_input(fieldname, user, [form])
2740 Returns HTML for an input to select a Unix user. By default this is a text
2741 box with a user popup button next to it.
2746 if (defined(&theme_unix_user_input)) {
2747 return &theme_unix_user_input(@_);
2749 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2750 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2753 =head2 unix_group_input(fieldname, user, [form])
2755 Returns HTML for an input to select a Unix group. By default this is a text
2756 box with a group popup button next to it.
2759 sub unix_group_input
2761 if (defined(&theme_unix_group_input)) {
2762 return &theme_unix_group_input(@_);
2764 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2765 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2768 =head2 hlink(text, page, [module], [width], [height])
2770 Returns HTML for a link that when clicked on pops up a window for a Webmin
2771 help page. The parameters are :
2773 =item text - Text for the link.
2775 =item page - Help page code, such as 'intro'.
2777 =item module - Module the help page is in. Defaults to the current module.
2779 =item width - Width of the help popup window. Defaults to 600 pixels.
2781 =item height - Height of the help popup window. Defaults to 400 pixels.
2783 The actual help pages are in each module's help sub-directory, in files with
2789 if (defined(&theme_hlink)) {
2790 return &theme_hlink(@_);
2792 my $mod = $_[2] ? $_[2] : &get_module_name();
2793 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2794 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2795 return "<a onClick='window.open(\"$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>";
2798 =head2 user_chooser_button(field, multiple, [form])
2800 Returns HTML for a javascript button for choosing a Unix user or users.
2801 The parameters are :
2803 =item field - Name of the HTML field to place the username into.
2805 =item multiple - Set to 1 if multiple users can be selected.
2807 =item form - Index of the form on the page.
2810 sub user_chooser_button
2812 return undef if (!&supports_users());
2813 return &theme_user_chooser_button(@_)
2814 if (defined(&theme_user_chooser_button));
2815 my $form = defined($_[2]) ? $_[2] : 0;
2816 my $w = $_[1] ? 500 : 300;
2818 if ($_[1] && $gconfig{'db_sizeusers'}) {
2819 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2821 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2822 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2824 return "<input type=button onClick='ifield = form.$_[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";
2827 =head2 group_chooser_button(field, multiple, [form])
2829 Returns HTML for a javascript button for choosing a Unix group or groups
2830 The parameters are :
2832 =item field - Name of the HTML field to place the group name into.
2834 =item multiple - Set to 1 if multiple groups can be selected.
2836 =item form - Index of the form on the page.
2839 sub group_chooser_button
2841 return undef if (!&supports_users());
2842 return &theme_group_chooser_button(@_)
2843 if (defined(&theme_group_chooser_button));
2844 my $form = defined($_[2]) ? $_[2] : 0;
2845 my $w = $_[1] ? 500 : 300;
2847 if ($_[1] && $gconfig{'db_sizeusers'}) {
2848 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2850 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2851 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2853 return "<input type=button onClick='ifield = form.$_[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";
2856 =head2 foreign_check(module, [api-only])
2858 Checks if some other module exists and is supported on this OS. The parameters
2861 =item module - Name of the module to check.
2863 =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.
2868 my ($mod, $api) = @_;
2870 my $mdir = &module_root_directory($mod);
2871 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2872 return &check_os_support(\%minfo, undef, undef, $api);
2875 =head2 foreign_exists(module)
2877 Checks if some other module exists. The module parameter is the short module
2883 my $mdir = &module_root_directory($_[0]);
2884 return -r "$mdir/module.info";
2887 =head2 foreign_available(module)
2889 Returns 1 if some module is installed, and acessible to the current user. The
2890 module parameter is the module directory name.
2893 sub foreign_available
2895 return 0 if (!&foreign_check($_[0]) &&
2896 !$gconfig{'available_even_if_no_support'});
2897 my %foreign_module_info = &get_module_info($_[0]);
2899 # Check list of allowed modules
2901 &read_acl(\%acl, undef);
2902 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2903 !$acl{$base_remote_user,'*'});
2905 # Check for usermod restrictions
2906 my @usermods = &list_usermods();
2907 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2909 if (&get_product_name() eq "webmin") {
2910 # Check if the user has any RBAC privileges in this module
2911 if (&supports_rbac($_[0]) &&
2912 &use_rbac_module_acl(undef, $_[0])) {
2913 # RBAC is enabled for this user and module - check if he
2915 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2916 return 0 if (!$rbacs);
2918 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2919 # If denying access to modules not specifically allowed by
2920 # RBAC, then prevent access
2925 # Check readonly support
2926 if (&is_readonly_mode()) {
2927 return 0 if (!$foreign_module_info{'readonly'});
2930 # Check if theme vetos
2931 if (defined(&theme_foreign_available)) {
2932 return 0 if (!&theme_foreign_available($_[0]));
2935 # Check if licence module vetos
2936 if ($main::licence_module) {
2937 return 0 if (!&foreign_call($main::licence_module,
2938 "check_module_licence", $_[0]));
2944 =head2 foreign_require(module, [file], [package])
2946 Brings in functions from another module, and places them in the Perl namespace
2947 with the same name as the module. The parameters are :
2949 =item module - The source module's directory name, like sendmail.
2951 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2953 =item package - Perl package to place the module's functions and global variables in.
2955 If the original module name contains dashes, they will be replaced with _ in
2961 my ($mod, $file, $pkg) = @_;
2962 $pkg ||= $mod || "global";
2963 $pkg =~ s/[^A-Za-z0-9]/_/g;
2966 push(@files, $file);
2970 my %minfo = &get_module_info($mod);
2971 if ($minfo{'library'}) {
2972 @files = split(/\s+/, $minfo{'library'});
2975 @files = ( $mod."-lib.pl" );
2978 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
2979 return 1 if (!@files);
2980 foreach my $f (@files) {
2981 $main::done_foreign_require{$pkg,$f}++;
2984 my $mdir = &module_root_directory($mod);
2985 @INC = &unique($mdir, @INC);
2986 -d $mdir || &error("Module $mod does not exist");
2987 if (!&get_module_name() && $mod) {
2990 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
2991 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
2992 my $code = "package $pkg; ".
2993 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
2994 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
2995 foreach my $f (@files) {
2996 $code .= "do '$mdir/$f' || die \$@; ";
2999 if (defined($old_fmn)) {
3000 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3003 delete($ENV{'FOREIGN_MODULE_NAME'});
3005 if (defined($old_frd)) {
3006 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3009 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3012 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3016 =head2 foreign_call(module, function, [arg]*)
3018 Call a function in another module. The module parameter is the target module
3019 directory name, function is the perl sub to call, and the remaining parameters
3020 are the arguments. However, unless you need to call a function whose name
3021 is dynamic, it is better to use Perl's cross-module function call syntax
3022 like module::function(args).
3027 my $pkg = $_[0] || "global";
3028 $pkg =~ s/[^A-Za-z0-9]/_/g;
3029 my @args = @_[2 .. @_-1];
3030 $main::foreign_args = \@args;
3031 my @rv = eval <<EOF;
3033 &$_[1](\@{\$main::foreign_args});
3035 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3036 return wantarray ? @rv : $rv[0];
3039 =head2 foreign_config(module, [user-config])
3041 Get the configuration from another module, and return it as a hash. If the
3042 user-config parameter is set to 1, returns the Usermin user-level preferences
3043 for the current user instead.
3048 my ($mod, $uc) = @_;
3051 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3052 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3053 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3056 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3061 =head2 foreign_installed(module, mode)
3063 Checks if the server for some module is installed, and possibly also checks
3064 if the module has been configured by Webmin.
3065 For mode 1, returns 2 if the server is installed and configured for use by
3066 Webmin, 1 if installed but not configured, or 0 otherwise.
3067 For mode 0, returns 1 if installed, 0 if not.
3068 If the module does not provide an install_check.pl script, assumes that
3069 the server is installed.
3072 sub foreign_installed
3074 my ($mod, $configured) = @_;
3075 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3077 return $main::foreign_installed_cache{$mod,$configured};
3081 if (!&foreign_check($mod)) {
3086 my $mdir = &module_root_directory($mod);
3087 if (!-r "$mdir/install_check.pl") {
3088 # Not known, assume OK
3089 $rv = $configured ? 2 : 1;
3092 # Call function to check
3093 &foreign_require($mod, "install_check.pl");
3094 $rv = &foreign_call($mod, "is_installed", $configured);
3097 $main::foreign_installed_cache{$mod,$configured} = $rv;
3102 =head2 foreign_defined(module, function)
3104 Returns 1 if some function is defined in another module. In general, it is
3105 simpler to use the syntax &defined(module::function) instead.
3111 $pkg =~ s/[^A-Za-z0-9]/_/g;
3112 my $func = "${pkg}::$_[1]";
3113 return defined(&$func);
3116 =head2 get_system_hostname([short])
3118 Returns the hostname of this system. If the short parameter is set to 1,
3119 then the domain name is not prepended - otherwise, Webmin will attempt to get
3120 the fully qualified hostname, like foo.example.com.
3123 sub get_system_hostname
3126 if (!$main::get_system_hostname[$m]) {
3127 if ($gconfig{'os_type'} ne 'windows') {
3128 # Try some common Linux hostname files first
3130 if ($gconfig{'os_type'} eq 'redhat-linux') {
3132 &read_env_file("/etc/sysconfig/network", \%nc);
3133 if ($nc{'HOSTNAME'}) {
3134 $fromfile = $nc{'HOSTNAME'};
3137 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3138 my $hn = &read_file_contents("/etc/hostname");
3144 elsif ($gconfig{'os_type'} eq 'open-linux') {
3145 my $hn = &read_file_contents("/etc/HOSTNAME");
3151 elsif ($gconfig{'os_type'} eq 'solaris') {
3152 my $hn = &read_file_contents("/etc/nodename");
3159 # If we found a hostname, use it if value
3160 if ($fromfile && ($m || $fromfile =~ /\./)) {
3162 $fromfile =~ s/\..*$//;
3164 $main::get_system_hostname[$m] = $fromfile;
3168 # Can use hostname command on Unix
3169 &execute_command("hostname", undef,
3170 \$main::get_system_hostname[$m], undef, 0, 1);
3171 chop($main::get_system_hostname[$m]);
3173 eval "use Sys::Hostname";
3175 $main::get_system_hostname[$m] = eval "hostname()";
3177 if ($@ || !$main::get_system_hostname[$m]) {
3178 $main::get_system_hostname[$m] = "UNKNOWN";
3181 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3182 $gconfig{'os_type'} =~ /linux$/ &&
3183 !$gconfig{'no_hostname_f'} && !$_[0]) {
3184 # Try with -f flag to get fully qualified name
3186 my $ex = &execute_command("hostname -f", undef, \$flag,
3189 if ($ex || $flag eq "") {
3190 # -f not supported! We have probably set the
3191 # hostname to just '-f'. Fix the problem
3194 &execute_command("hostname ".
3195 quotemeta($main::get_system_hostname[$m]),
3196 undef, undef, undef, 0, 1);
3200 $main::get_system_hostname[$m] = $flag;
3205 # On Windows, try computername environment variable
3206 return $ENV{'computername'} if ($ENV{'computername'});
3207 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3209 # Fall back to net name command
3210 my $out = `net name 2>&1`;
3211 if ($out =~ /\-+\r?\n(\S+)/) {
3212 $main::get_system_hostname[$m] = $1;
3215 $main::get_system_hostname[$m] = "windows";
3219 return $main::get_system_hostname[$m];
3222 =head2 get_webmin_version
3224 Returns the version of Webmin currently being run, such as 1.450.
3227 sub get_webmin_version
3229 if (!$get_webmin_version) {
3230 open(VERSION, "$root_directory/version") || return 0;
3231 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3234 return $get_webmin_version;
3237 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3239 Returns a hash containing access control options for the given user and module.
3240 By default the current username and module name are used. If the no-rbac flag
3241 is given, the permissions will not be updated based on the user's RBAC role
3242 (as seen on Solaris). If the no-default flag is given, default permissions for
3243 the module will not be included.
3248 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3249 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3250 my $mdir = &module_root_directory($m);
3253 # Read default ACL first, to be overridden by per-user settings
3254 &read_file_cached("$mdir/defaultacl", \%rv);
3256 # If this isn't a master admin user, apply the negative permissions
3257 # so that he doesn't un-expectedly gain access to new features
3259 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3260 if ($gaccess{'negative'}) {
3261 &read_file_cached("$mdir/negativeacl", \%rv);
3265 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3266 # RBAC overrides exist for this user in this module
3267 my $rbac = &get_rbac_module_acl(
3268 defined($_[0]) ? $_[0] : $remote_user, $m);
3269 foreach my $r (keys %$rbac) {
3270 $rv{$r} = $rbac->{$r};
3273 elsif ($gconfig{"risk_$u"} && $m) {
3274 # ACL is defined by user's risk level
3275 my $rf = $gconfig{"risk_$u"}.'.risk';
3276 &read_file_cached("$mdir/$rf", \%rv);
3278 my $sf = $gconfig{"skill_$u"}.'.skill';
3279 &read_file_cached("$mdir/$sf", \%rv);
3282 # Use normal Webmin ACL, if a user is set
3283 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3284 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3285 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3288 if ($tconfig{'preload_functions'}) {
3289 &load_theme_library();
3291 if (defined(&theme_get_module_acl)) {
3292 %rv = &theme_get_module_acl($u, $m, \%rv);
3297 =head2 get_group_module_acl(group, [module])
3299 Returns the ACL for a Webmin group, in an optional module (which defaults to
3300 the current module).
3303 sub get_group_module_acl
3306 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3307 my $mdir = &module_root_directory($m);
3309 &read_file_cached("$mdir/defaultacl", \%rv);
3310 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3311 if (defined(&theme_get_module_acl)) {
3312 %rv = &theme_get_module_acl($g, $m, \%rv);
3317 =head2 save_module_acl(&acl, [user], [module])
3319 Updates the acl hash for some user and module. The parameters are :
3321 =item acl - Hash reference for the new access control options.
3323 =item user - User to update, defaulting to the current user.
3325 =item module - Module to update, defaulting to the caller.
3330 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3331 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3332 if (&foreign_check("acl")) {
3333 # Check if this user is a member of a group, and if he gets the
3334 # module from a group. If so, update its ACL as well
3335 &foreign_require("acl", "acl-lib.pl");
3337 foreach my $g (&acl::list_groups()) {
3338 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3339 &indexof($m, @{$g->{'modules'}}) >= 0) {
3345 &save_group_module_acl($_[0], $group->{'name'}, $m);
3348 if (!-d "$config_directory/$m") {
3349 mkdir("$config_directory/$m", 0755);
3351 &write_file("$config_directory/$m/$u.acl", $_[0]);
3354 =head2 save_group_module_acl(&acl, group, [module])
3356 Updates the acl hash for some group and module. The parameters are :
3358 =item acl - Hash reference for the new access control options.
3360 =item group - Group name to update.
3362 =item module - Module to update, defaulting to the caller.
3365 sub save_group_module_acl
3368 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3369 if (&foreign_check("acl")) {
3370 # Check if this group is a member of a group, and if it gets the
3371 # module from a group. If so, update the parent ACL as well
3372 &foreign_require("acl", "acl-lib.pl");
3374 foreach my $pg (&acl::list_groups()) {
3375 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3376 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3382 &save_group_module_acl($_[0], $group->{'name'}, $m);
3385 if (!-d "$config_directory/$m") {
3386 mkdir("$config_directory/$m", 0755);
3388 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3393 This function must be called by all Webmin CGI scripts, either directly or
3394 indirectly via a per-module lib.pl file. It performs a number of initialization
3395 and housekeeping tasks, such as working out the module name, checking that the
3396 current user has access to the module, and populating global variables. Some
3397 of the variables set include :
3399 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3401 =item $var_directory - Base logs directory, typically /var/webmin
3403 =item %config - Per-module configuration.
3405 =item %gconfig - Global configuration.
3407 =item $scriptname - Base name of the current perl script.
3409 =item $module_name - The name of the current module.
3411 =item $module_config_directory - The config directory for this module.
3413 =item $module_config_file - The config file for this module.
3415 =item $module_root_directory - This module's code directory.
3417 =item $webmin_logfile - The detailed logfile for webmin.
3419 =item $remote_user - The actual username used to login to webmin.
3421 =item $base_remote_user - The username whose permissions are in effect.
3423 =item $current_theme - The theme currently in use.
3425 =item $root_directory - The first root directory of this webmin install.
3427 =item @root_directories - All root directories for this webmin install.
3432 # Record first process ID that called this, so we know when it exited to clean
3434 $main::initial_process_id ||= $$;
3436 # Configuration and spool directories
3437 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3438 die "WEBMIN_CONFIG not set";
3440 $config_directory = $ENV{'WEBMIN_CONFIG'};
3441 if (!defined($ENV{'WEBMIN_VAR'})) {
3442 open(VARPATH, "$config_directory/var-path");
3443 chop($var_directory = <VARPATH>);
3447 $var_directory = $ENV{'WEBMIN_VAR'};
3449 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3450 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3452 if ($ENV{'SESSION_ID'}) {
3453 # Hide this variable from called programs, but keep it for internal use
3454 $main::session_id = $ENV{'SESSION_ID'};
3455 delete($ENV{'SESSION_ID'});
3457 if ($ENV{'REMOTE_PASS'}) {
3458 # Hide the password too
3459 $main::remote_pass = $ENV{'REMOTE_PASS'};
3460 delete($ENV{'REMOTE_PASS'});
3463 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3464 # Looks like we are running setuid, but the real UID hasn't been set.
3465 # Do so now, so that executed programs don't get confused
3470 # Read the webmin global config file. This contains the OS type and version,
3471 # OS specific configuration and global options such as proxy servers
3472 $config_file = "$config_directory/config";
3474 &read_file_cached($config_file, \%gconfig);
3475 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3476 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3478 # If debugging is enabled, open the debug log
3479 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3480 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3481 if ($gconfig{'debug_size'}) {
3482 my @st = stat($dlog);
3483 if ($st[7] > $gconfig{'debug_size'}) {
3484 rename($dlog, $dlog.".0");
3487 open(main::DEBUGLOG, ">>$dlog");
3488 $main::opened_debug_log = 1;
3490 if ($gconfig{'debug_what_start'}) {
3491 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3492 $main::debug_log_start_time = time();
3493 &webmin_debug_log("START", "script=$script_name");
3494 $main::debug_log_start_module = $module_name;
3498 # Set PATH and LD_LIBRARY_PATH
3499 if ($gconfig{'path'}) {
3500 if ($gconfig{'syspath'}) {
3502 $ENV{'PATH'} = $gconfig{'path'};
3506 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3509 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3511 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3512 if ($gconfig{'http_proxy'}) {
3513 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3515 if ($gconfig{'ftp_proxy'}) {
3516 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3518 if ($gconfig{'noproxy'}) {
3519 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3522 # Find all root directories
3524 if (&get_miniserv_config(\%miniserv)) {
3525 @root_directories = ( $miniserv{'root'} );
3526 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3527 push(@root_directories, $miniserv{"extraroot_$i"});
3531 # Work out which module we are in, and read the per-module config file
3532 $0 =~ s/\\/\//g; # Force consistent path on Windows
3533 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3534 # In a foreign call - use the module name given
3535 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3536 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3537 @root_directories = ( $root_directory ) if (!@root_directories);
3539 elsif ($ENV{'SCRIPT_NAME'}) {
3540 my $sn = $ENV{'SCRIPT_NAME'};
3541 $sn =~ s/^$gconfig{'webprefix'}//
3542 if (!$gconfig{'webprefixnoredir'});
3543 if ($sn =~ /^\/([^\/]+)\//) {
3544 # Get module name from CGI path
3547 if ($ENV{'SERVER_ROOT'}) {
3548 $root_directory = $ENV{'SERVER_ROOT'};
3550 elsif ($ENV{'SCRIPT_FILENAME'}) {
3551 $root_directory = $ENV{'SCRIPT_FILENAME'};
3552 $root_directory =~ s/$sn$//;
3554 @root_directories = ( $root_directory ) if (!@root_directories);
3557 # Get root directory from miniserv.conf, and deduce module name from $0
3558 $root_directory = $root_directories[0];
3560 foreach my $r (@root_directories) {
3561 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3562 # Under a module directory
3567 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3573 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3576 # Work out of this is a web, command line or cron job
3577 if (!$main::webmin_script_type) {
3578 if ($ENV{'SCRIPT_NAME'}) {
3580 $main::webmin_script_type = 'web';
3583 # Cron jobs have no TTY
3584 if ($gconfig{'os_type'} eq 'windows' ||
3585 open(DEVTTY, ">/dev/tty")) {
3586 $main::webmin_script_type = 'cmd';
3590 $main::webmin_script_type = 'cron';
3595 # Set the umask based on config
3596 if ($gconfig{'umask'} && !$main::umask_already++) {
3597 umask(oct($gconfig{'umask'}));
3600 # If this is a cron job or other background task, set the nice level
3601 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3603 if ($gconfig{'nice'}) {
3604 eval 'POSIX::nice($gconfig{\'nice\'});';
3607 # Set IO scheduling class and priority
3608 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3610 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3611 if ($gconfig{'sclass'} ne '');
3612 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3613 if ($gconfig{'sprio'} ne '');
3615 &execute_command("$cmd >/dev/null 2>&1");
3618 $main::nice_already++;
3621 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3622 $base_remote_user = $u;
3623 $remote_user = $ENV{'REMOTE_USER'};
3626 # Find and load the configuration file for this module
3627 my (@ruinfo, $rgroup);
3628 $module_config_directory = "$config_directory/$module_name";
3629 if (&get_product_name() eq "usermin" &&
3630 -r "$module_config_directory/config.$remote_user") {
3632 $module_config_file = "$module_config_directory/config.$remote_user";
3634 elsif (&get_product_name() eq "usermin" &&
3635 (@ruinfo = getpwnam($remote_user)) &&
3636 ($rgroup = getgrgid($ruinfo[3])) &&
3637 -r "$module_config_directory/config.\@$rgroup") {
3638 # Based on group name
3639 $module_config_file = "$module_config_directory/config.\@$rgroup";
3643 $module_config_file = "$module_config_directory/config";
3646 &read_file_cached($module_config_file, \%config);
3648 # Fix up windows-specific substitutions in values
3649 foreach my $k (keys %config) {
3650 if ($config{$k} =~ /\$\{systemroot\}/) {
3651 my $root = &get_windows_root();
3652 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3657 # Record the initial module
3658 $main::initial_module_name ||= $module_name;
3660 # Set some useful variables
3662 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3663 $gconfig{'mobile_theme'} :
3664 defined($gconfig{'theme_'.$remote_user}) ?
3665 $gconfig{'theme_'.$remote_user} :
3666 defined($gconfig{'theme_'.$base_remote_user}) ?
3667 $gconfig{'theme_'.$base_remote_user} :
3669 @current_themes = split(/\s+/, $current_themes);
3670 $current_theme = $current_themes[0];
3671 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3672 $theme_root_directory = $theme_root_directories[0];
3673 @theme_configs = ( );
3674 foreach my $troot (@theme_root_directories) {
3676 &read_file_cached("$troot/config", \%onetconfig);
3677 &read_file_cached("$troot/config", \%tconfig);
3678 push(@theme_configs, \%onetconfig);
3680 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3681 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3683 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3684 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3686 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3687 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3688 if ($tconfig{'preload_functions'}) {
3689 # Force load of theme functions right now, if requested
3690 &load_theme_library();
3692 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3693 # Load the theme's Webmin:: package classes
3694 do "$theme_root_directory/$tconfig{'oofunctions'}";
3699 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3700 : "$var_directory/webmin.log";
3702 # Load language strings into %text
3703 my @langs = &list_languages();
3705 if ($gconfig{'acceptlang'}) {
3706 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3707 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3709 $accepted_lang = $al->{'lang'};
3714 $current_lang = $force_lang ? $force_lang :
3715 $accepted_lang ? $accepted_lang :
3716 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3717 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3718 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3719 foreach my $l (@langs) {
3720 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3722 @lang_order_list = &unique($default_lang,
3723 split(/:/, $current_lang_info->{'fallback'}),
3725 %text = &load_language($module_name);
3726 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3728 # Get the %module_info for this module
3730 my ($mi) = grep { $_->{'dir'} eq $module_name }
3731 &get_all_module_infos(2);
3732 %module_info = %$mi;
3733 $module_root_directory = &module_root_directory($module_name);
3736 if ($module_name && !$main::no_acl_check &&
3737 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3738 # Check if the HTTP user can access this module
3739 if (!&foreign_available($module_name)) {
3740 if (!&foreign_check($module_name)) {
3741 &error(&text('emodulecheck',
3742 "<i>$module_info{'desc'}</i>"));
3745 &error(&text('emodule', "<i>$u</i>",
3746 "<i>$module_info{'desc'}</i>"));
3749 $main::no_acl_check++;
3752 # Check the Referer: header for nasty redirects
3753 my @referers = split(/\s+/, $gconfig{'referers'});
3755 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3758 my $http_host = $ENV{'HTTP_HOST'};
3759 $http_host =~ s/:\d+$//;
3760 my $unsafe_index = $unsafe_index_cgi ||
3761 &get_module_variable('$unsafe_index_cgi');
3763 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
3764 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3766 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3767 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3768 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3769 ($referer_site && $referer_site ne $http_host &&
3770 &indexof($referer_site, @referers) < 0 ||
3771 !$referer_site && $gconfig{'referers_none'}) &&
3772 !$trust_unknown_referers &&
3773 !&get_module_variable('$trust_unknown_referers')) {
3774 # Looks like a link from elsewhere .. show an error
3775 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3777 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3778 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3779 if ($referer_site) {
3781 print &text('referer_warn',
3782 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3784 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3785 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3788 # No referer info given
3789 print &text('referer_warn_unknown', $url),"<p>\n";
3790 print &text('referer_fix1u'),"<p>\n";
3791 print &text('referer_fix2u'),"<p>\n";
3795 &footer("/", $text{'index'});
3798 $main::no_referers_check++;
3799 $main::completed_referers_check++;
3801 # Call theme post-init
3802 if (defined(&theme_post_init_config)) {
3803 &theme_post_init_config(@_);
3806 # Record that we have done the calling library in this package
3807 my ($callpkg, $lib) = caller();
3809 $main::done_foreign_require{$callpkg,$lib} = 1;
3811 # If a licence checking is enabled, do it now
3812 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3813 &foreign_check($gconfig{'licence_module'}) &&
3814 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3815 my $oldpwd = &get_current_dir();
3816 $main::done_licence_module_check++;
3817 $main::licence_module = $gconfig{'licence_module'};
3818 &foreign_require($main::licence_module, "licence_check.pl");
3819 ($main::licence_status, $main::licence_message) =
3820 &foreign_call($main::licence_module, "check_licence");
3824 # Export global variables to caller
3825 if ($main::export_to_caller) {
3826 foreach my $v ('$config_file', '%gconfig', '$null_file',
3827 '$path_separator', '@root_directories',
3828 '$root_directory', '$module_name',
3829 '$base_remote_user', '$remote_user',
3830 '$module_config_directory', '$module_config_file',
3831 '%config', '@current_themes', '$current_theme',
3832 '@theme_root_directories', '$theme_root_directory',
3833 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3834 '$webmin_logfile', '$current_lang',
3835 '$current_lang_info', '@lang_order_list', '%text',
3836 '%module_info', '$module_root_directory') {
3837 my ($vt, $vn) = split('', $v, 2);
3838 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3845 =head2 load_language([module], [directory])
3847 Returns a hashtable mapping text codes to strings in the appropriate language,
3848 based on the $current_lang global variable, which is in turn set based on
3849 the Webmin user's selection. The optional module parameter tells the function
3850 which module to load strings for, and defaults to the calling module. The
3851 optional directory parameter can be used to load strings from a directory
3854 In regular module development you will never need to call this function
3855 directly, as init_config calls it for you, and places the module's strings
3856 into the %text hash.
3862 my $root = $root_directory;
3863 my $ol = $gconfig{'overlang'};
3864 my ($dir) = ($_[1] || "lang");
3866 # Read global lang files
3867 foreach my $o (@lang_order_list) {
3868 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3869 return () if (!$ok && $o eq $default_lang);
3872 foreach my $o (@lang_order_list) {
3873 &read_file_cached("$root/$ol/$o", \%text);
3876 &read_file_cached("$config_directory/custom-lang", \%text);
3879 # Read module's lang files
3880 my $mdir = &module_root_directory($_[0]);
3881 foreach my $o (@lang_order_list) {
3882 &read_file_cached("$mdir/$dir/$o", \%text);
3885 foreach $o (@lang_order_list) {
3886 &read_file_cached("$mdir/$ol/$o", \%text);
3889 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3891 foreach $k (keys %text) {
3892 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3895 if (defined(&theme_load_language)) {
3896 &theme_load_language(\%text, $_[0]);
3901 =head2 text_subs(string)
3903 Used internally by load_language to expand $code substitutions in language
3909 if (substr($_[0], 0, 8) eq "include:") {
3912 open(INCLUDE, substr($_[0], 8));
3920 my $t = $_[1]->{$_[0]};
3921 return defined($t) ? $t : '$'.$_[0];
3925 =head2 text(message, [substitute]+)
3927 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3928 the substitute parameters. This makes it easy to use strings with placeholders
3929 that get replaced with programmatically generated text. For example :
3931 print &text('index_hello', $remote_user),"<p>\n";
3936 my $t = &get_module_variable('%text', 1);
3937 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3938 for(my $i=1; $i<@_; $i++) {
3939 $rv =~ s/\$$i/$_[$i]/g;
3944 =head2 encode_base64(string)
3946 Encodes a string into base64 format, for use in MIME email or HTTP
3947 authorization headers.
3953 pos($_[0]) = 0; # ensure start at the beginning
3954 while ($_[0] =~ /(.{1,57})/gs) {
3955 $res .= substr(pack('u57', $1), 1)."\n";
3958 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3959 my $padding = (3 - length($_[0]) % 3) % 3;
3960 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3964 =head2 decode_base64(string)
3966 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3973 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3974 if (length($str) % 4) {
3977 $str =~ s/=+$//; # remove padding
3978 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3979 while ($str =~ /(.{1,60})/gs) {
3980 my $len = chr(32 + length($1)*3/4); # compute length byte
3981 $res .= unpack("u", $len . $1 ); # uudecode
3986 =head2 get_module_info(module, [noclone], [forcache])
3988 Returns a hash containg details of the given module. Some useful keys are :
3990 =item dir - The module directory, like sendmail.
3992 =item desc - Human-readable description, in the current users' language.
3994 =item version - Optional module version number.
3996 =item os_support - List of supported operating systems and versions.
3998 =item category - Category on Webmin's left menu, like net.
4003 return () if ($_[0] =~ /^\./);
4004 my (%rv, $clone, $o);
4005 my $mdir = &module_root_directory($_[0]);
4006 &read_file_cached("$mdir/module.info", \%rv) || return ();
4008 foreach $o (@lang_order_list) {
4009 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4010 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4012 if ($clone && !$_[1] && $config_directory) {
4013 $rv{'clone'} = $rv{'desc'};
4014 &read_file("$config_directory/$_[0]/clone", \%rv);
4017 my %module_categories;
4018 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4019 my $pn = &get_product_name();
4020 if (defined($rv{'category_'.$pn})) {
4021 # Can override category for webmin/usermin
4022 $rv{'category'} = $rv{'category_'.$pn};
4024 $rv{'realcategory'} = $rv{'category'};
4025 $rv{'category'} = $module_categories{$_[0]}
4026 if (defined($module_categories{$_[0]}));
4028 # Apply description overrides
4029 $rv{'realdesc'} = $rv{'desc'};
4031 &read_file_cached("$config_directory/webmin.descs", \%descs);
4032 if ($descs{$_[0]." ".$current_lang}) {
4033 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4035 elsif ($descs{$_[0]}) {
4036 $rv{'desc'} = $descs{$_[0]};
4040 # Apply per-user description overridde
4041 my %gaccess = &get_module_acl(undef, "");
4042 if ($gaccess{'desc_'.$_[0]}) {
4043 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4047 if ($rv{'longdesc'}) {
4048 # All standard modules have an index.cgi
4049 $rv{'index_link'} = 'index.cgi';
4052 # Call theme-specific override function
4053 if (defined(&theme_get_module_info)) {
4054 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4060 =head2 get_all_module_infos(cachemode)
4062 Returns a list contains the information on all modules in this webmin
4063 install, including clones. Uses caching to reduce the number of module.info
4064 files that need to be read. Each element of the array is a hash reference
4065 in the same format as returned by get_module_info. The cache mode flag can be :
4066 0 = read and write, 1 = don't read or write, 2 = read only
4069 sub get_all_module_infos
4073 # Is the cache out of date? (ie. have any of the root's changed?)
4074 my $cache_file = "$config_directory/module.infos.cache";
4076 if (&read_file_cached($cache_file, \%cache)) {
4077 foreach my $r (@root_directories) {
4079 if ($st[9] != $cache{'mtime_'.$r}) {
4089 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4090 # Can use existing module.info cache
4092 foreach my $k (keys %cache) {
4093 if ($k =~ /^(\S+) (\S+)$/) {
4094 $mods{$1}->{$2} = $cache{$k};
4097 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4100 # Need to rebuild cache
4102 foreach my $r (@root_directories) {
4104 foreach my $m (readdir(DIR)) {
4105 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4106 my %minfo = &get_module_info($m, 0, 1);
4107 next if (!%minfo || !$minfo{'dir'});
4109 foreach $k (keys %minfo) {
4110 $cache{"${m} ${k}"} = $minfo{$k};
4115 $cache{'mtime_'.$r} = $st[9];
4117 $cache{'lang'} = $current_lang;
4118 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4121 # Override descriptions for modules for current user
4122 my %gaccess = &get_module_acl(undef, "");
4123 foreach my $m (@rv) {
4124 if ($gaccess{"desc_".$m->{'dir'}}) {
4125 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4129 # Apply installed flags
4131 &read_file_cached("$config_directory/installed.cache", \%installed);
4132 foreach my $m (@rv) {
4133 $m->{'installed'} = $installed{$m->{'dir'}};
4139 =head2 get_theme_info(theme)
4141 Returns a hash containing a theme's details, taken from it's theme.info file.
4142 Some useful keys are :
4144 =item dir - The theme directory, like blue-theme.
4146 =item desc - Human-readable description, in the current users' language.
4148 =item version - Optional module version number.
4150 =item os_support - List of supported operating systems and versions.
4155 return () if ($_[0] =~ /^\./);
4157 my $tdir = &module_root_directory($_[0]);
4158 &read_file("$tdir/theme.info", \%rv) || return ();
4159 foreach my $o (@lang_order_list) {
4160 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4166 =head2 list_languages
4168 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4169 Each is a hash reference with the following keys :
4171 =item lang - The short language code, like es for Spanish.
4173 =item desc - A human-readable description, in English.
4175 =item charset - An optional character set to use when displaying the language.
4177 =item titles - Set to 1 only if Webmin has title images for the language.
4179 =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.
4184 if (!@main::list_languages_cache) {
4187 open(LANG, "$root_directory/lang_list.txt");
4189 if (/^(\S+)\s+(.*)/) {
4190 my $l = { 'desc' => $2 };
4191 foreach $o (split(/,/, $1)) {
4192 if ($o =~ /^([^=]+)=(.*)$/) {
4196 $l->{'index'} = scalar(@rv);
4197 push(@main::list_languages_cache, $l);
4201 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4202 @main::list_languages_cache;
4204 return @main::list_languages_cache;
4207 =head2 read_env_file(file, &hash)
4209 Similar to Webmin's read_file function, but handles files containing shell
4210 environment variables formatted like :
4215 The file parameter is the full path to the file to read, and hash a Perl hash
4216 ref to read names and values into.
4222 &open_readfile(FILE, $_[0]) || return 0;
4225 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4226 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4227 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4235 =head2 write_env_file(file, &hash, [export])
4237 Writes out a hash to a file in name='value' format, suitable for use in a shell
4238 script. The parameters are :
4240 =item file - Full path for a file to write to
4242 =item hash - Hash reference of names and values to write.
4244 =item export - If set to 1, preceed each variable setting with the word 'export'.
4249 my $exp = $_[2] ? "export " : "";
4250 &open_tempfile(FILE, ">$_[0]");
4251 foreach my $k (keys %{$_[1]}) {
4252 my $v = $_[1]->{$k};
4253 if ($v =~ /^\S+$/) {
4254 &print_tempfile(FILE, "$exp$k=$v\n");
4257 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4260 &close_tempfile(FILE);
4263 =head2 lock_file(filename, [readonly], [forcefile])
4265 Lock a file for exclusive access. If the file is already locked, spin
4266 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4267 to work OK. The parameters are :
4269 =item filename - File or directory to lock.
4271 =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.
4273 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4278 my $realfile = &translate_filename($_[0]);
4279 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4280 my $no_lock = !&can_lock_file($realfile);
4281 my $lock_tries_count = 0;
4284 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4289 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4292 # Create the .lock file
4293 open(LOCKING, ">$realfile.lock") || return 0;
4294 my $lck = eval "flock(LOCKING, 2+4)";
4296 # Lock of lock file failed! Wait till later
4299 print LOCKING $$,"\n";
4300 eval "flock(LOCKING, 8)";
4303 $main::locked_file_list{$realfile} = int($_[1]);
4304 push(@main::temporary_files, "$realfile.lock");
4305 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4306 !&get_module_variable('$no_log_file_changes') &&
4308 # Grab a copy of this file for later diffing
4310 $main::locked_file_data{$realfile} = undef;
4312 $main::locked_file_type{$realfile} = 1;
4313 $main::locked_file_data{$realfile} = '';
4315 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4316 $main::locked_file_type{$realfile} = 2;
4317 $main::locked_file_data{$realfile} = $lnk;
4319 elsif (open(ORIGFILE, $realfile)) {
4320 $main::locked_file_type{$realfile} = 0;
4321 $main::locked_file_data{$realfile} = '';
4324 $main::locked_file_data{$realfile} .=$_;
4333 if ($lock_tries_count++ > 5*60) {
4334 # Give up after 5 minutes
4335 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4341 =head2 unlock_file(filename)
4343 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4344 file changes is enabled, then at unlock file a diff will be taken between the
4345 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4346 called. This can then be viewed in the Webmin Actions Log module.
4351 my $realfile = &translate_filename($_[0]);
4352 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4353 unlink("$realfile.lock") if (&can_lock_file($realfile));
4354 delete($main::locked_file_list{$realfile});
4355 if (exists($main::locked_file_data{$realfile})) {
4356 # Diff the new file with the old
4358 my $lnk = readlink($realfile);
4359 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4360 my $oldtype = $main::locked_file_type{$realfile};
4361 my $new = !defined($main::locked_file_data{$realfile});
4362 if ($new && !-e _) {
4363 # file doesn't exist, and never did! do nothing ..
4365 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4366 # is (or was) a directory ..
4367 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4368 push(@main::locked_file_diff,
4369 { 'type' => 'mkdir', 'object' => $realfile });
4371 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4372 push(@main::locked_file_diff,
4373 { 'type' => 'rmdir', 'object' => $realfile });
4376 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4377 # is (or was) a symlink ..
4378 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4379 push(@main::locked_file_diff,
4380 { 'type' => 'symlink', 'object' => $realfile,
4383 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4384 push(@main::locked_file_diff,
4385 { 'type' => 'unsymlink', 'object' => $realfile,
4386 'data' => $main::locked_file_data{$realfile} });
4388 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4389 push(@main::locked_file_diff,
4390 { 'type' => 'resymlink', 'object' => $realfile,
4395 # is a file, or has changed type?!
4396 my ($diff, $delete_file);
4397 my $type = "modify";
4399 open(NEWFILE, ">$realfile");
4404 if (!defined($main::locked_file_data{$realfile})) {
4407 open(ORIGFILE, ">$realfile.webminorig");
4408 print ORIGFILE $main::locked_file_data{$realfile};
4410 $diff = &backquote_command(
4411 "diff ".quotemeta("$realfile.webminorig")." ".
4412 quotemeta($realfile)." 2>/dev/null");
4413 push(@main::locked_file_diff,
4414 { 'type' => $type, 'object' => $realfile,
4415 'data' => $diff } ) if ($diff);
4416 unlink("$realfile.webminorig");
4417 unlink($realfile) if ($delete_file);
4420 if ($gconfig{'logfullfiles'}) {
4421 # Add file details to list of those to fully log
4422 $main::orig_file_data{$realfile} ||=
4423 $main::locked_file_data{$realfile};
4424 $main::orig_file_type{$realfile} ||=
4425 $main::locked_file_type{$realfile};
4428 delete($main::locked_file_data{$realfile});
4429 delete($main::locked_file_type{$realfile});
4433 =head2 test_lock(file)
4435 Returns 1 if some file is currently locked, 0 if not.
4440 my $realfile = &translate_filename($_[0]);
4441 return 0 if (!$_[0]);
4442 return 1 if (defined($main::locked_file_list{$realfile}));
4443 return 0 if (!&can_lock_file($realfile));
4445 if (open(LOCKING, "$realfile.lock")) {
4450 return $pid && kill(0, $pid);
4453 =head2 unlock_all_files
4455 Unlocks all files locked by the current script.
4458 sub unlock_all_files
4460 foreach $f (keys %main::locked_file_list) {
4465 =head2 can_lock_file(file)
4467 Returns 1 if some file should be locked, based on the settings in the
4468 Webmin Configuration module. For internal use by lock_file only.
4473 if (&is_readonly_mode()) {
4474 return 0; # never lock in read-only mode
4476 elsif ($gconfig{'lockmode'} == 0) {
4479 elsif ($gconfig{'lockmode'} == 1) {
4483 # Check if under any of the directories
4485 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4486 if (&same_file($d, $_[0]) ||
4487 &is_under_directory($d, $_[0])) {
4491 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4495 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4497 Log some action taken by a user. This is typically called at the end of a
4498 script, once all file changes are complete and all commands run. The
4501 =item action - A short code for the action being performed, like 'create'.
4503 =item type - A code for the type of object the action is performed to, like 'user'.
4505 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4507 =item params - A hash ref of additional information about the action.
4509 =item module - Name of the module in which the action was performed, which defaults to the current module.
4511 =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.
4513 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4515 =item client-ip - IP address of the browser that performed the action.
4520 return if (!$gconfig{'log'} || &is_readonly_mode());
4521 my $m = $_[4] ? $_[4] : &get_module_name();
4523 if ($gconfig{'logclear'}) {
4524 # check if it is time to clear the log
4525 my @st = stat("$webmin_logfile.time");
4526 my $write_logtime = 0;
4528 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4529 # clear logfile and all diff files
4530 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4531 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4532 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4533 unlink($webmin_logfile);
4540 if ($write_logtime) {
4541 open(LOGTIME, ">$webmin_logfile.time");
4542 print LOGTIME time(),"\n";
4547 # If an action script directory is defined, call the appropriate scripts
4548 if ($gconfig{'action_script_dir'}) {
4549 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4550 my ($basedir) = $gconfig{'action_script_dir'};
4552 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4555 opendir(DIR, $dir) or die "Can't open $dir: $!";
4556 while (defined($file = readdir(DIR))) {
4557 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4558 if (-x "$dir/$file") {
4559 # Call a script notifying it of the action
4561 $ENV{'ACTION_MODULE'} = &get_module_name();
4562 $ENV{'ACTION_ACTION'} = $_[0];
4563 $ENV{'ACTION_TYPE'} = $_[1];
4564 $ENV{'ACTION_OBJECT'} = $_[2];
4565 $ENV{'ACTION_SCRIPT'} = $script_name;
4566 foreach my $p (keys %param) {
4567 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4569 system("$dir/$file", @_,
4570 "<$null_file", ">$null_file", "2>&1");
4578 # should logging be done at all?
4579 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4580 split(/\s+/, $gconfig{'logusers'})) < 0);
4581 return if ($gconfig{'logmodules'} && &indexof($m,
4582 split(/\s+/, $gconfig{'logmodules'})) < 0);
4586 my @tm = localtime($now);
4587 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4588 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4589 $main::action_id_count++;
4590 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4591 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4592 $tm[2], $tm[1], $tm[0],
4593 $remote_user || '-',
4594 $main::session_id || '-',
4595 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4596 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4597 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4599 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4600 my $v = $_[3]->{$k};
4606 elsif (ref($v) eq 'ARRAY') {
4610 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4611 $line .= " $k='$vv'";
4615 foreach $vv (split(/\0/, $v)) {
4617 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4618 $line .= " $k='$vv'";
4621 $param{$k} = join(" ", @pv);
4623 open(WEBMINLOG, ">>$webmin_logfile");
4624 print WEBMINLOG $line,"\n";
4626 if ($gconfig{'logperms'}) {
4627 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4630 chmod(0600, $webmin_logfile);
4633 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4634 # Find and record the changes made to any locked files, or commands run
4636 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4637 foreach my $d (@main::locked_file_diff) {
4638 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4639 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4640 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4641 print DIFFLOG $d->{'data'};
4643 if ($d->{'input'}) {
4644 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4645 print DIFFLOG $d->{'input'};
4648 if ($gconfig{'logperms'}) {
4649 chmod(oct($gconfig{'logperms'}),
4650 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4651 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4655 @main::locked_file_diff = undef;
4657 if ($gconfig{'logfullfiles'}) {
4658 # Save the original contents of any modified files
4660 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4661 foreach my $f (keys %main::orig_file_data) {
4662 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4663 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4664 if (!defined($main::orig_file_type{$f})) {
4665 print ORIGLOG -1," ",$f,"\n";
4668 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4670 print ORIGLOG $main::orig_file_data{$f};
4672 if ($gconfig{'logperms'}) {
4673 chmod(oct($gconfig{'logperms'}),
4674 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4678 %main::orig_file_data = undef;
4679 %main::orig_file_type = undef;
4683 if ($gconfig{'logsyslog'}) {
4684 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4685 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4686 setlogsock("inet");';
4688 # Syslog module is installed .. try to convert to a
4689 # human-readable form
4691 my $mod = &get_module_name();
4692 my $mdir = module_root_directory($mod);
4693 if (-r "$mdir/log_parser.pl") {
4694 &foreign_require($mod, "log_parser.pl");
4696 foreach my $k (keys %{$_[3]}) {
4697 my $v = $_[3]->{$k};
4698 if (ref($v) eq 'ARRAY') {
4699 $params{$k} = join("\0", @$v);
4705 $msg = &foreign_call($mod, "parse_webmin_log",
4706 $remote_user, $script_name,
4707 $_[0], $_[1], $_[2], \%params);
4708 $msg =~ s/<[^>]*>//g; # Remove tags
4710 elsif ($_[0] eq "_config_") {
4711 my %wtext = &load_language("webminlog");
4712 $msg = $wtext{'search_config'};
4714 $msg ||= "$_[0] $_[1] $_[2]";
4715 my %info = &get_module_info($m);
4716 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4721 =head2 additional_log(type, object, data, [input])
4723 Records additional log data for an upcoming call to webmin_log, such
4724 as a command that was run or SQL that was executed. Typically you will never
4725 need to call this function directory.
4730 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4731 push(@main::locked_file_diff,
4732 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4733 'input' => $_[3] } );
4737 =head2 webmin_debug_log(type, message)
4739 Write something to the Webmin debug log. For internal use only.
4742 sub webmin_debug_log
4744 my ($type, $msg) = @_;
4745 return 0 if (!$main::opened_debug_log);
4746 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4747 if ($gconfig{'debug_modules'}) {
4748 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
4749 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
4752 my @tm = localtime($now);
4754 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4755 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4756 $tm[2], $tm[1], $tm[0],
4757 $remote_user || "-",
4758 $ENV{'REMOTE_HOST'} || "-",
4759 &get_module_name() || "-",
4762 seek(main::DEBUGLOG, 0, 2);
4763 print main::DEBUGLOG $line."\n";
4767 =head2 system_logged(command)
4769 Just calls the Perl system() function, but also logs the command run.
4774 if (&is_readonly_mode()) {
4775 print STDERR "Vetoing command $_[0]\n";
4778 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4779 my $cmd = join(" ", @realcmd);
4781 if ($cmd =~ s/(\s*&\s*)$//) {
4784 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4785 $cmd =~ s/^\((.*)\)\s*$/$1/;
4787 &additional_log('exec', undef, $cmd);
4788 return system(@realcmd);
4791 =head2 backquote_logged(command)
4793 Executes a command and returns the output (like `command`), but also logs it.
4796 sub backquote_logged
4798 if (&is_readonly_mode()) {
4800 print STDERR "Vetoing command $_[0]\n";
4803 my $realcmd = &translate_command($_[0]);
4806 if ($cmd =~ s/(\s*&\s*)$//) {
4809 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4810 $cmd =~ s/^\((.*)\)\s*$/$1/;
4812 &additional_log('exec', undef, $cmd);
4813 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4817 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4819 Runs some command, waiting at most the given number of seconds for it to
4820 complete, and returns the output. The maxlines parameter sets the number
4821 of lines of output to capture. The safe parameter should be set to 1 if the
4822 command is safe for read-only mode users to run.
4825 sub backquote_with_timeout
4827 my $realcmd = &translate_command($_[0]);
4828 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4829 if ($gconfig{'debug_what_cmd'});
4831 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4836 my $elapsed = time() - $start;
4837 last if ($elapsed > $_[1]);
4839 vec($rmask, fileno(OUT), 1) = 1;
4840 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4841 last if (!$sel || $sel < 0);
4843 last if (!defined($line));
4846 if ($_[3] && $linecount >= $_[3]) {
4851 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4855 return wantarray ? ($out, $timed_out) : $out;
4858 =head2 backquote_command(command, safe?)
4860 Executes a command and returns the output (like `command`), subject to
4861 command translation. The safe parameter should be set to 1 if the command
4862 is safe for read-only mode users to run.
4865 sub backquote_command
4867 if (&is_readonly_mode() && !$_[1]) {
4868 print STDERR "Vetoing command $_[0]\n";
4872 my $realcmd = &translate_command($_[0]);
4873 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4877 =head2 kill_logged(signal, pid, ...)
4879 Like Perl's built-in kill function, but also logs the fact that some process
4880 was killed. On Windows, falls back to calling process.exe to terminate a
4886 return scalar(@_)-1 if (&is_readonly_mode());
4887 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4888 if ($gconfig{'debug_what_procs'});
4889 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4890 if ($gconfig{'os_type'} eq 'windows') {
4891 # Emulate some kills with process.exe
4892 my $arg = $_[0] eq "KILL" ? "-k" :
4893 $_[0] eq "TERM" ? "-q" :
4894 $_[0] eq "STOP" ? "-s" :
4895 $_[0] eq "CONT" ? "-r" : undef;
4897 foreach my $p (@_[1..@_-1]) {
4899 $ok ||= kill($_[0], $p);
4902 &execute_command("process $arg $p");
4914 =head2 rename_logged(old, new)
4916 Re-names a file and logs the rename. If the old and new files are on different
4917 filesystems, calls mv or the Windows rename function to do the job.
4922 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4923 return &rename_file($_[0], $_[1]);
4926 =head2 rename_file(old, new)
4928 Renames a file or directory. If the old and new files are on different
4929 filesystems, calls mv or the Windows rename function to do the job.
4934 if (&is_readonly_mode()) {
4935 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4938 my $src = &translate_filename($_[0]);
4939 my $dst = &translate_filename($_[1]);
4940 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4941 if ($gconfig{'debug_what_ops'});
4942 my $ok = rename($src, $dst);
4943 if (!$ok && $! !~ /permission/i) {
4944 # Try the mv command, in case this is a cross-filesystem rename
4945 if ($gconfig{'os_type'} eq 'windows') {
4946 # Need to use rename
4947 my $out = &backquote_command("rename ".quotemeta($_[0]).
4948 " ".quotemeta($_[1])." 2>&1");
4950 $! = $out if (!$ok);
4954 my $out = &backquote_command("mv ".quotemeta($_[0]).
4955 " ".quotemeta($_[1])." 2>&1");
4957 $! = $out if (!$ok);
4963 =head2 symlink_logged(src, dest)
4965 Create a symlink, and logs it. Effectively does the same thing as the Perl
4972 my $rv = &symlink_file($_[0], $_[1]);
4973 &unlock_file($_[1]);
4977 =head2 symlink_file(src, dest)
4979 Creates a soft link, unless in read-only mode. Effectively does the same thing
4980 as the Perl symlink function.
4985 if (&is_readonly_mode()) {
4986 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4989 my $src = &translate_filename($_[0]);
4990 my $dst = &translate_filename($_[1]);
4991 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
4992 if ($gconfig{'debug_what_ops'});
4993 return symlink($src, $dst);
4996 =head2 link_file(src, dest)
4998 Creates a hard link, unless in read-only mode. The existing new link file
4999 will be deleted if necessary. Effectively the same as Perl's link function.
5004 if (&is_readonly_mode()) {
5005 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5008 my $src = &translate_filename($_[0]);
5009 my $dst = &translate_filename($_[1]);
5010 &webmin_debug_log('LINK', "src=$src dst=$dst")
5011 if ($gconfig{'debug_what_ops'});
5012 unlink($dst); # make sure link works
5013 return link($src, $dst);
5016 =head2 make_dir(dir, perms, recursive)
5018 Creates a directory and sets permissions on it, unless in read-only mode.
5019 The perms parameter sets the octal permissions to apply, which unlike Perl's
5020 mkdir will really get set. The recursive flag can be set to 1 to have the
5021 function create parent directories too.
5026 my ($dir, $perms, $recur) = @_;
5027 if (&is_readonly_mode()) {
5028 print STDERR "Vetoing directory $dir\n";
5031 $dir = &translate_filename($dir);
5032 my $exists = -d $dir ? 1 : 0;
5033 return 1 if ($exists && $recur); # already exists
5034 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5035 my $rv = mkdir($dir, $perms);
5036 if (!$rv && $recur) {
5037 # Failed .. try mkdir -p
5038 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5039 my $ex = &execute_command("mkdir $param "."e_path($dir));
5045 chmod($perms, $dir);
5050 =head2 set_ownership_permissions(user, group, perms, file, ...)
5052 Sets the user, group owner and permissions on some files. The parameters are :
5054 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5056 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5058 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5060 =item file - One or more files or directories to modify.
5063 sub set_ownership_permissions
5065 my ($user, $group, $perms, @files) = @_;
5066 if (&is_readonly_mode()) {
5067 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5070 @files = map { &translate_filename($_) } @files;
5071 if ($gconfig{'debug_what_ops'}) {
5072 foreach my $f (@files) {
5073 &webmin_debug_log('PERMS',
5074 "file=$f user=$user group=$group perms=$perms");
5078 if (defined($user)) {
5079 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5081 if (defined($group)) {
5082 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5085 my @uinfo = getpwuid($uid);
5088 $rv = chown($uid, $gid, @files);
5090 if ($rv && defined($perms)) {
5091 $rv = chmod($perms, @files);
5096 =head2 unlink_logged(file, ...)
5098 Like Perl's unlink function, but locks the files beforehand and un-locks them
5099 after so that the deletion is logged by Webmin.
5105 foreach my $f (@_) {
5106 if (!&test_lock($f)) {
5111 my @rv = &unlink_file(@_);
5112 foreach my $f (@_) {
5117 return wantarray ? @rv : $rv[0];
5120 =head2 unlink_file(file, ...)
5122 Deletes some files or directories. Like Perl's unlink function, but also
5123 recursively deletes directories with the rm command if needed.
5128 return 1 if (&is_readonly_mode());
5131 foreach my $f (@_) {
5132 &unflush_file_lines($f);
5133 my $realf = &translate_filename($f);
5134 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5136 if (!rmdir($realf)) {
5138 if ($gconfig{'os_type'} eq 'windows') {
5139 # Call del and rmdir commands
5142 my $out = `del /q "$qm" 2>&1`;
5144 $out = `rmdir "$qm" 2>&1`;
5149 my $qm = quotemeta($realf);
5150 $out = `rm -rf $qm 2>&1`;
5159 if (!unlink($realf)) {
5165 return wantarray ? ($rv, $err) : $rv;
5168 =head2 copy_source_dest(source, dest)
5170 Copy some file or directory to a new location. Returns 1 on success, or 0
5171 on failure - also sets $! on failure. If the source is a directory, uses
5172 piped tar commands to copy a whole directory structure including permissions
5176 sub copy_source_dest
5178 return (1, undef) if (&is_readonly_mode());
5179 my ($src, $dst) = @_;
5182 &webmin_debug_log('COPY', "src=$src dst=$dst")
5183 if ($gconfig{'debug_what_ops'});
5184 if ($gconfig{'os_type'} eq 'windows') {
5185 # No tar or cp on windows, so need to use copy command
5189 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5192 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5200 # A directory .. need to copy with tar command
5201 my @st = stat($src);
5204 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5205 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5212 # Can just copy with cp
5213 my $out = &backquote_logged("cp -p ".quotemeta($src).
5214 " ".quotemeta($dst)." 2>&1");
5220 return wantarray ? ($ok, $err) : $ok;
5223 =head2 remote_session_name(host|&server)
5225 Generates a session ID for some server. For this server, this will always
5226 be an empty string. For a server object it will include the hostname and
5227 port and PID. For a server name, it will include the hostname and PID. For
5231 sub remote_session_name
5233 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5234 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5235 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5236 ref($_[0]) ? "" : "$_[0].$$";
5239 =head2 remote_foreign_require(server, module, file)
5241 Connects to rpc.cgi on a remote webmin server and have it open a session
5242 to a process that will actually do the require and run functions. This is the
5243 equivalent for foreign_require, but for a remote Webmin system. The server
5244 parameter can either be a hostname of a system registered in the Webmin
5245 Servers Index module, or a hash reference for a system from that module.
5248 sub remote_foreign_require
5250 my $call = { 'action' => 'require',
5253 my $sn = &remote_session_name($_[0]);
5254 if ($remote_session{$sn}) {
5255 $call->{'session'} = $remote_session{$sn};
5258 $call->{'newsession'} = 1;
5260 my $rv = &remote_rpc_call($_[0], $call);
5261 if ($rv->{'session'}) {
5262 $remote_session{$sn} = $rv->{'session'};
5263 $remote_session_server{$sn} = $_[0];
5267 =head2 remote_foreign_call(server, module, function, [arg]*)
5269 Call a function on a remote server. Must have been setup first with
5270 remote_foreign_require for the same server and module. Equivalent to
5271 foreign_call, but with the extra server parameter to specify the remote
5275 sub remote_foreign_call
5277 return undef if (&is_readonly_mode());
5278 my $sn = &remote_session_name($_[0]);
5279 return &remote_rpc_call($_[0], { 'action' => 'call',
5282 'session' => $remote_session{$sn},
5283 'args' => [ @_[3 .. $#_] ] } );
5286 =head2 remote_foreign_check(server, module, [api-only])
5288 Checks if some module is installed and supported on a remote server. Equivilant
5289 to foreign_check, but for the remote Webmin system specified by the server
5293 sub remote_foreign_check
5295 return &remote_rpc_call($_[0], { 'action' => 'check',
5300 =head2 remote_foreign_config(server, module)
5302 Gets the configuration for some module from a remote server, as a hash.
5303 Equivalent to foreign_config, but for a remote system.
5306 sub remote_foreign_config
5308 return &remote_rpc_call($_[0], { 'action' => 'config',
5309 'module' => $_[1] });
5312 =head2 remote_eval(server, module, code)
5314 Evaluates some perl code in the context of a module on a remote webmin server.
5315 The server parameter must be the hostname of a remote system, module must
5316 be a module directory name, and code a string of Perl code to run. This can
5317 only be called after remote_foreign_require for the same server and module.
5322 return undef if (&is_readonly_mode());
5323 my $sn = &remote_session_name($_[0]);
5324 return &remote_rpc_call($_[0], { 'action' => 'eval',
5327 'session' => $remote_session{$sn} });
5330 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5332 Transfers some local file to another server via Webmin's RPC protocol, and
5333 returns the resulting remote filename. If the remotefile parameter is given,
5334 that is the destination filename which will be used. Otherwise a randomly
5335 selected temporary filename will be used, and returned by the function.
5340 return undef if (&is_readonly_mode());
5342 my $sn = &remote_session_name($_[0]);
5343 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5344 # Copy data over TCP connection
5345 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5347 'name' => $_[3] } );
5349 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5350 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5351 return &$main::remote_error_handler("Failed to transfer file : $error")
5354 while(read(FILE, $got, 1024) > 0) {
5358 shutdown(TWRITE, 1);
5360 if ($error && $error !~ /^OK/) {
5361 # Got back an error!
5362 return &$main::remote_error_handler("Failed to transfer file : $error");
5368 # Just pass file contents as parameters
5370 while(read(FILE, $got, 1024) > 0) {
5374 return &remote_rpc_call($_[0], { 'action' => 'write',
5377 'session' => $remote_session{$sn} });
5381 =head2 remote_read(server, localfile, remotefile)
5383 Transfers a file from a remote server to this system, using Webmin's RPC
5384 protocol. The server parameter must be the hostname of a system registered
5385 in the Webmin Servers Index module, localfile is the destination path on this
5386 system, and remotefile is the file to fetch from the remote server.
5391 my $sn = &remote_session_name($_[0]);
5392 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5393 # Copy data over TCP connection
5394 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5395 'file' => $_[2] } );
5397 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5400 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5401 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5402 return &$main::remote_error_handler("Failed to transfer file : $error")
5405 open(FILE, ">$_[1]");
5406 while(read(TREAD, $got, 1024) > 0) {
5413 # Just get data as return value
5414 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5416 'session' => $remote_session{$sn} });
5417 open(FILE, ">$_[1]");
5423 =head2 remote_finished
5425 Close all remote sessions. This happens automatically after a while
5426 anyway, but this function should be called to clean things up faster.
5431 foreach my $sn (keys %remote_session) {
5432 my $server = $remote_session_server{$sn};
5433 &remote_rpc_call($server, { 'action' => 'quit',
5434 'session' => $remote_session{$sn} } );
5435 delete($remote_session{$sn});
5436 delete($remote_session_server{$sn});
5438 foreach $fh (keys %fast_fh_cache) {
5440 delete($fast_fh_cache{$fh});
5444 =head2 remote_error_setup(&function)
5446 Sets a function to be called instead of &error when a remote RPC operation
5447 fails. Useful if you want to have more control over your remote operations.
5450 sub remote_error_setup
5452 $main::remote_error_handler = $_[0] || \&error;
5455 =head2 remote_rpc_call(server, structure)
5457 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5458 and then reads back a reply structure. This is mainly for internal use only,
5459 and is called by the other remote_* functions.
5465 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5467 # Server structure was given
5469 $serv->{'user'} || $serv->{'id'} == 0 ||
5470 return &$main::remote_error_handler(
5471 "No Webmin login set for server");
5474 # lookup the server in the webmin servers module if needed
5475 if (!%main::remote_servers_cache) {
5476 &foreign_require("servers", "servers-lib.pl");
5477 foreach $s (&foreign_call("servers", "list_servers")) {
5478 $main::remote_servers_cache{$s->{'host'}} = $s;
5479 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5482 $serv = $main::remote_servers_cache{$_[0]};
5483 $serv || return &$main::remote_error_handler(
5484 "No Webmin Servers entry for $_[0]");
5485 $serv->{'user'} || return &$main::remote_error_handler(
5486 "No login set for server $_[0]");
5488 my $ip = $serv->{'ip'} || $serv->{'host'};
5490 # Work out the username and password
5492 if ($serv->{'sameuser'}) {
5493 $user = $remote_user;
5494 defined($main::remote_pass) || return &$main::remote_error_handler(
5495 "Password for this server is not available");
5496 $pass = $main::remote_pass;
5499 $user = $serv->{'user'};
5500 $pass = $serv->{'pass'};
5503 if ($serv->{'fast'} || !$sn) {
5504 # Make TCP connection call to fastrpc.cgi
5505 if (!$fast_fh_cache{$sn} && $sn) {
5506 # Need to open the connection
5507 my $con = &make_http_connection(
5508 $ip, $serv->{'port'}, $serv->{'ssl'},
5509 "POST", "/fastrpc.cgi");
5510 return &$main::remote_error_handler(
5511 "Failed to connect to $serv->{'host'} : $con")
5513 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5514 &write_http_connection($con, "User-agent: Webmin\r\n");
5515 my $auth = &encode_base64("$user:$pass");
5517 &write_http_connection($con, "Authorization: basic $auth\r\n");
5518 &write_http_connection($con, "Content-length: ",
5519 length($tostr),"\r\n");
5520 &write_http_connection($con, "\r\n");
5521 &write_http_connection($con, $tostr);
5523 # read back the response
5524 my $line = &read_http_connection($con);
5525 $line =~ tr/\r\n//d;
5526 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5527 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5529 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5530 return &$main::remote_error_handler("HTTP error : $line");
5532 $line = &read_http_connection($con);
5533 $line =~ tr/\r\n//d;
5535 $line = &read_http_connection($con);
5536 if ($line =~ /^0\s+(.*)/) {
5537 return &$main::remote_error_handler("RPC error : $1");
5539 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5540 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5541 # Started ok .. connect and save SID
5542 &close_http_connection($con);
5543 my ($port, $sid, $version, $error) = ($1, $2, $3);
5544 &open_socket($ip, $port, $sid, \$error);
5545 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5547 $fast_fh_cache{$sn} = $sid;
5548 $remote_server_version{$sn} = $version;
5551 while($stuff = &read_http_connection($con)) {
5554 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5557 elsif (!$fast_fh_cache{$sn}) {
5558 # Open the connection by running fastrpc.cgi locally
5559 pipe(RPCOUTr, RPCOUTw);
5563 open(STDOUT, ">&RPCOUTw");
5567 $ENV{'REQUEST_METHOD'} = 'GET';
5568 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5569 $ENV{'SERVER_ROOT'} ||= $root_directory;
5571 if ($base_remote_user ne 'root' &&
5572 $base_remote_user ne 'admin') {
5573 # Need to fake up a login for the CGI!
5574 &read_acl(undef, \%acl);
5575 $ENV{'BASE_REMOTE_USER'} =
5576 $ENV{'REMOTE_USER'} =
5577 $acl{'root'} ? 'root' : 'admin';
5579 delete($ENV{'FOREIGN_MODULE_NAME'});
5580 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5581 chdir($root_directory);
5582 if (!exec("$root_directory/fastrpc.cgi")) {
5583 print "exec failed : $!\n";
5590 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5594 if ($line =~ /^0\s+(.*)/) {
5595 return &$main::remote_error_handler("RPC error : $2");
5597 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5598 # Started ok .. connect and save SID
5600 my ($port, $sid, $error) = ($1, $2, undef);
5601 &open_socket("localhost", $port, $sid, \$error);
5602 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5603 $fast_fh_cache{$sn} = $sid;
5610 &error("Bad response from fastrpc.cgi : $line");
5613 # Got a connection .. send off the request
5614 my $fh = $fast_fh_cache{$sn};
5615 my $tostr = &serialise_variable($_[1]);
5616 print $fh length($tostr)," $fh\n";
5618 my $rlen = int(<$fh>);
5619 my ($fromstr, $got);
5620 while(length($fromstr) < $rlen) {
5621 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5622 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5625 my $from = &unserialise_variable($fromstr);
5627 return &$main::remote_error_handler("Remote Webmin error");
5629 if (defined($from->{'arv'})) {
5630 return @{$from->{'arv'}};
5633 return $from->{'rv'};
5637 # Call rpc.cgi on remote server
5638 my $tostr = &serialise_variable($_[1]);
5640 my $con = &make_http_connection($ip, $serv->{'port'},
5641 $serv->{'ssl'}, "POST", "/rpc.cgi");
5642 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5644 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5645 &write_http_connection($con, "User-agent: Webmin\r\n");
5646 my $auth = &encode_base64("$user:$pass");
5648 &write_http_connection($con, "Authorization: basic $auth\r\n");
5649 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5650 &write_http_connection($con, "\r\n");
5651 &write_http_connection($con, $tostr);
5653 # read back the response
5654 my $line = &read_http_connection($con);
5655 $line =~ tr/\r\n//d;
5656 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5657 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5659 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5661 $line = &read_http_connection($con);
5662 $line =~ tr/\r\n//d;
5665 while($line = &read_http_connection($con)) {
5669 my $from = &unserialise_variable($fromstr);
5670 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5671 if (defined($from->{'arv'})) {
5672 return @{$from->{'arv'}};
5675 return $from->{'rv'};
5680 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5682 Executes some function in parallel on multiple servers at once. Fills in
5683 the returns and errors arrays respectively. If the module and library
5684 parameters are given, that module is remotely required on the server first,
5685 to check if it is connectable. The parameters are :
5687 =item servers - A list of Webmin system hash references.
5689 =item parallel - Number of parallel operations to perform.
5691 =item function - Reference to function to call for each system.
5693 =item args - Additional parameters to the function.
5695 =item returns - Array ref to place return values into, in same order as servers.
5697 =item errors - Array ref to place error messages into.
5699 =item module - Optional module to require on the remote system first.
5701 =item library - Optional library to require in the module.
5704 sub remote_multi_callback
5706 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5707 &remote_error_setup(\&remote_multi_callback_error);
5709 # Call the functions
5711 foreach my $g (@$servs) {
5717 $remote_multi_callback_err = undef;
5719 # Require the remote lib
5720 &remote_foreign_require($g->{'host'}, $mod, $lib);
5721 if ($remote_multi_callback_err) {
5722 # Failed .. return error
5723 print $wh &serialise_variable(
5724 [ undef, $remote_multi_callback_err ]);
5730 my $a = ref($args) ? $args->[$p] : $args;
5731 my $rv = &$func($g, $a);
5734 print $wh &serialise_variable(
5735 [ $rv, $remote_multi_callback_err ]);
5743 # Read back the results
5745 foreach my $g (@$servs) {
5749 $errs->[$p] = "Failed to read response from $g->{'host'}";
5752 my $rv = &unserialise_variable($line);
5754 $rets->[$p] = $rv->[0];
5755 $errs->[$p] = $rv->[1];
5760 &remote_error_setup(undef);
5763 sub remote_multi_callback_error
5765 $remote_multi_callback_err = $_[0];
5768 =head2 serialise_variable(variable)
5770 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5771 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5772 called on each member to serialize the entire object.
5775 sub serialise_variable
5777 if (!defined($_[0])) {
5783 $rv = &urlize($_[0]);
5785 elsif ($r eq 'SCALAR') {
5786 $rv = &urlize(${$_[0]});
5788 elsif ($r eq 'ARRAY') {
5789 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5791 elsif ($r eq 'HASH') {
5792 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5793 &urlize(&serialise_variable($_[0]->{$_})) }
5796 elsif ($r eq 'REF') {
5797 $rv = &serialise_variable(${$_[0]});
5799 elsif ($r eq 'CODE') {
5804 # An object - treat as a hash
5805 $r = "OBJECT ".&urlize($r);
5806 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5807 &urlize(&serialise_variable($_[0]->{$_})) }
5810 return ($r ? $r : 'VAL').",".$rv;
5813 =head2 unserialise_variable(string)
5815 Converts a string created by serialise_variable() back into the original
5816 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5817 object, the same class is used on this system, if available.
5820 sub unserialise_variable
5822 my @v = split(/,/, $_[0]);
5824 if ($v[0] eq 'VAL') {
5825 @v = split(/,/, $_[0], -1);
5826 $rv = &un_urlize($v[1]);
5828 elsif ($v[0] eq 'SCALAR') {
5829 local $r = &un_urlize($v[1]);
5832 elsif ($v[0] eq 'ARRAY') {
5834 for(my $i=1; $i<@v; $i++) {
5835 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5838 elsif ($v[0] eq 'HASH') {
5840 for(my $i=1; $i<@v; $i+=2) {
5841 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5842 &unserialise_variable(&un_urlize($v[$i+1]));
5845 elsif ($v[0] eq 'REF') {
5846 local $r = &unserialise_variable($v[1]);
5849 elsif ($v[0] eq 'UNDEF') {
5852 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5853 # An object hash that we have to re-bless
5856 for(my $i=1; $i<@v; $i+=2) {
5857 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5858 &unserialise_variable(&un_urlize($v[$i+1]));
5866 =head2 other_groups(user)
5868 Returns a list of secondary groups a user is a member of, as a list of
5877 while(my @g = getgrent()) {
5878 my @m = split(/\s+/, $g[3]);
5879 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5881 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5885 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5887 Returns HTML for a button that pops up a data chooser window. The parameters
5890 =item dayfield - Name of the text field to place the day of the month into.
5892 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5894 =item yearfield - Name of the text field to place the year into.
5897 sub date_chooser_button
5899 return &theme_date_chooser_button(@_)
5900 if (defined(&theme_date_chooser_button));
5901 my ($w, $h) = (250, 225);
5902 if ($gconfig{'db_sizedate'}) {
5903 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5905 return "<input type=button onClick='window.dfield = form.$_[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";
5908 =head2 help_file(module, file)
5910 Returns the path to a module's help file of some name, typically under the
5911 help directory with a .html extension.
5916 my $mdir = &module_root_directory($_[0]);
5917 my $dir = "$mdir/help";
5918 foreach my $o (@lang_order_list) {
5919 my $lang = "$dir/$_[1].$o.html";
5920 return $lang if (-r $lang);
5922 return "$dir/$_[1].html";
5927 Seeds the random number generator, if not already done in this script. On Linux
5928 this makes use of the current time, process ID and a read from /dev/urandom.
5929 On other systems, only the current time and process ID are used.
5934 if (!$main::done_seed_random) {
5935 if (open(RANDOM, "/dev/urandom")) {
5937 read(RANDOM, $buf, 4);
5939 srand(time() ^ $$ ^ $buf);
5944 $main::done_seed_random = 1;
5948 =head2 disk_usage_kb(directory)
5950 Returns the number of kB used by some directory and all subdirs. Implemented
5951 by calling the C<du -k> command.
5956 my $dir = &translate_filename($_[0]);
5958 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5960 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5962 return $out =~ /^([0-9]+)/ ? $1 : "???";
5965 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
5967 Returns the number of bytes taken up by all files in some directory and all
5968 sub-directories, by summing up their lengths. The disk_usage_kb is more
5969 reflective of reality, as the filesystem typically pads file sizes to 1k or
5973 sub recursive_disk_usage
5975 my $dir = &translate_filename($_[0]);
5982 my @st = stat($dir);
5988 my @files = readdir(DIR);
5990 foreach my $f (@files) {
5991 next if ($f eq "." || $f eq "..");
5992 next if ($skip && $f =~ /$skip/);
5993 next if ($only && $f !~ /$only/);
5994 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6000 =head2 help_search_link(term, [ section, ... ] )
6002 Returns HTML for a link to the man module for searching local and online
6003 docs for various search terms. The term parameter can either be a single
6004 word like 'bind', or a space-separated list of words. This function is typically
6005 used by modules that want to refer users to additional documentation in man
6006 pages or local system doc files.
6009 sub help_search_link
6011 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6012 my $for = &urlize(shift(@_));
6013 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6014 join("&", map { "section=$_" } @_)."&".
6015 "for=$for&exact=1&check=".&get_module_name()."'>".
6016 $text{'helpsearch'}."</a>\n";
6023 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6025 Opens a connection to some HTTP server, maybe through a proxy, and returns
6026 a handle object. The handle can then be used to send additional headers
6027 and read back a response. If anything goes wrong, returns an error string.
6028 The parameters are :
6030 =item host - Hostname or IP address of the webserver to connect to.
6032 =item port - HTTP port number to connect to.
6034 =item ssl - Set to 1 to connect in SSL mode.
6036 =item method - HTTP method, like GET or POST.
6038 =item page - Page to request on the webserver, like /foo/index.html
6040 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6043 sub make_http_connection
6045 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6048 foreach my $h (@$headers) {
6049 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6053 if (&is_readonly_mode()) {
6054 return "HTTP connections not allowed in readonly mode";
6056 my $rv = { 'fh' => time().$$ };
6059 eval "use Net::SSLeay";
6060 $@ && return $text{'link_essl'};
6061 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6062 eval "Net::SSLeay::load_error_strings()";
6063 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6064 return "Failed to create SSL context";
6065 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6066 return "Failed to create SSL connection";
6068 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6069 !&no_proxy($host)) {
6072 &open_socket($1, $2, $rv->{'fh'}, \$error);
6075 my $fh = $rv->{'fh'};
6076 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6077 if ($gconfig{'proxy_user'}) {
6078 my $auth = &encode_base64(
6079 "$gconfig{'proxy_user'}:".
6080 "$gconfig{'proxy_pass'}");
6081 $auth =~ tr/\r\n//d;
6082 print $fh "Proxy-Authorization: Basic $auth\r\n";
6086 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6087 return "Proxy error : $3" if ($2 != 200);
6090 return "Proxy error : $line";
6095 elsif (!$gconfig{'proxy_fallback'}) {
6096 # Connection to proxy failed - give up
6103 &open_socket($host, $port, $rv->{'fh'}, \$error);
6104 return $error if ($error);
6106 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6107 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6108 return "SSL connect() failed";
6109 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6110 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6113 # Plain HTTP request
6115 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6116 !&no_proxy($host)) {
6119 &open_socket($1, $2, $rv->{'fh'}, \$error);
6123 my $fh = $rv->{'fh'};
6124 my $rtxt = $method." ".
6125 "http://$host:$port$page HTTP/1.0\r\n";
6126 if ($gconfig{'proxy_user'}) {
6127 my $auth = &encode_base64(
6128 "$gconfig{'proxy_user'}:".
6129 "$gconfig{'proxy_pass'}");
6130 $auth =~ tr/\r\n//d;
6131 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6136 elsif (!$gconfig{'proxy_fallback'}) {
6141 # Connecting directly
6143 &open_socket($host, $port, $rv->{'fh'}, \$error);
6144 return $error if ($error);
6145 my $fh = $rv->{'fh'};
6146 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6153 =head2 read_http_connection(&handle, [bytes])
6155 Reads either one line or up to the specified number of bytes from the handle,
6156 originally supplied by make_http_connection.
6159 sub read_http_connection
6163 if ($h->{'ssl_con'}) {
6166 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6167 # need to read more..
6168 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6170 $rv = $h->{'buffer'};
6171 delete($h->{'buffer'});
6174 $h->{'buffer'} .= $more;
6176 $rv = substr($h->{'buffer'}, 0, $idx+1);
6177 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6180 if (length($h->{'buffer'})) {
6181 $rv = $h->{'buffer'};
6182 delete($h->{'buffer'});
6185 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6191 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6194 my $fh = $h->{'fh'};
6198 $rv = undef if ($rv eq "");
6202 =head2 write_http_connection(&handle, [data+])
6204 Writes the given data to the given HTTP connection handle.
6207 sub write_http_connection
6210 my $fh = $h->{'fh'};
6212 if ($h->{'ssl_ctx'}) {
6213 foreach my $s (@_) {
6214 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6215 $allok = 0 if (!$ok);
6219 my $ok = (print $fh @_);
6220 $allok = 0 if (!$ok);
6225 =head2 close_http_connection(&handle)
6227 Closes a connection to an HTTP server, identified by the given handle.
6230 sub close_http_connection
6236 =head2 clean_environment
6238 Deletes any environment variables inherited from miniserv so that they
6239 won't be passed to programs started by webmin. This is useful when calling
6240 programs that check for CGI-related environment variables and modify their
6241 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6244 sub clean_environment
6246 %UNCLEAN_ENV = %ENV;
6247 foreach my $k (keys %ENV) {
6248 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6252 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6253 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6254 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6255 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6256 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6257 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6258 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6259 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD') {
6264 =head2 reset_environment
6266 Puts the environment back how it was before clean_environment was callled.
6269 sub reset_environment
6272 foreach my $k (keys %UNCLEAN_ENV) {
6273 $ENV{$k} = $UNCLEAN_ENV{$k};
6275 undef(%UNCLEAN_ENV);
6279 =head2 progress_callback
6281 Never called directly, but useful for passing to &http_download to print
6282 out progress of an HTTP request.
6285 sub progress_callback
6287 if (defined(&theme_progress_callback)) {
6288 # Call the theme override
6289 return &theme_progress_callback(@_);
6293 print $progress_callback_prefix;
6295 $progress_size = $_[1];
6296 $progress_step = int($_[1] / 10);
6297 print &text('progress_size2', $progress_callback_url,
6298 &nice_size($progress_size)),"<br>\n";
6301 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6303 $last_progress_time = $last_progress_size = undef;
6305 elsif ($_[0] == 3) {
6307 my $sp = $progress_callback_prefix.(" " x 5);
6308 if ($progress_size) {
6309 # And we have a size to compare against
6310 my $st = int(($_[1] * 10) / $progress_size);
6311 my $time_now = time();
6312 if ($st != $progress_step ||
6313 $time_now - $last_progress_time > 60) {
6314 # Show progress every 10% or 60 seconds
6315 print $sp,&text('progress_datan', &nice_size($_[1]),
6316 int($_[1]*100/$progress_size)),"<br>\n";
6317 $last_progress_time = $time_now;
6319 $progress_step = $st;
6322 # No total size .. so only show in 100k jumps
6323 if ($_[1] > $last_progress_size+100*1024) {
6324 print $sp,&text('progress_data2n',
6325 &nice_size($_[1])),"<br>\n";
6326 $last_progress_size = $_[1];
6330 elsif ($_[0] == 4) {
6331 # All done downloading
6332 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6334 elsif ($_[0] == 5) {
6335 # Got new location after redirect
6336 $progress_callback_url = $_[1];
6338 elsif ($_[0] == 6) {
6340 $progress_callback_url = $_[1];
6341 print &text('progress_incache', $progress_callback_url),"<br>\n";
6345 =head2 switch_to_remote_user
6347 Changes the user and group of the current process to that of the unix user
6348 with the same name as the current webmin login, or fails if there is none.
6349 This should be called by Usermin module scripts that only need to run with
6350 limited permissions.
6353 sub switch_to_remote_user
6355 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6357 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6358 &create_missing_homedir(\@remote_user_info);
6360 &switch_to_unix_user(\@remote_user_info);
6361 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6362 $ENV{'HOME'} = $remote_user_info[7];
6364 # Export global variables to caller
6365 if ($main::export_to_caller) {
6366 my ($callpkg) = caller();
6367 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6371 =head2 switch_to_unix_user(&user-details)
6373 Switches the current process to the UID and group ID from the given list
6374 of user details, which must be in the format returned by getpwnam.
6377 sub switch_to_unix_user
6380 if (!defined($uinfo->[0])) {
6381 # No username given, so just use given GID
6382 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6385 # Use all groups from user
6386 ($(, $)) = ( $uinfo->[3],
6387 "$uinfo->[3] ".join(" ", $uinfo->[3],
6388 &other_groups($uinfo->[0])) );
6391 POSIX::setuid($uinfo->[2]);
6393 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6394 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6398 =head2 eval_as_unix_user(username, &code)
6400 Runs some code fragment with the effective UID and GID switch to that
6401 of the given Unix user, so that file IO takes place with his permissions.
6405 sub eval_as_unix_user
6407 my ($user, $code) = @_;
6408 my @uinfo = getpwnam($user);
6409 if (!scalar(@uinfo)) {
6410 &error("eval_as_unix_user called with invalid user $user");
6412 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6416 local $main::error_must_die = 1;
6423 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6426 return wantarray ? @rv : $rv[0];
6429 =head2 create_user_config_dirs
6431 Creates per-user config directories and sets $user_config_directory and
6432 $user_module_config_directory to them. Also reads per-user module configs
6433 into %userconfig. This should be called by Usermin module scripts that need
6434 to store per-user preferences or other settings.
6437 sub create_user_config_dirs
6439 return if (!$gconfig{'userconfig'});
6440 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6441 return if (!@uinfo || !$uinfo[7]);
6442 &create_missing_homedir(\@uinfo);
6443 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6444 if (!-d $user_config_directory) {
6445 mkdir($user_config_directory, 0700) ||
6446 &error("Failed to create $user_config_directory : $!");
6447 if ($< == 0 && $uinfo[2]) {
6448 chown($uinfo[2], $uinfo[3], $user_config_directory);
6451 if (&get_module_name()) {
6452 $user_module_config_directory = $user_config_directory."/".
6454 if (!-d $user_module_config_directory) {
6455 mkdir($user_module_config_directory, 0700) ||
6456 &error("Failed to create $user_module_config_directory : $!");
6457 if ($< == 0 && $uinfo[2]) {
6458 chown($uinfo[2], $uinfo[3], $user_config_directory);
6462 &read_file_cached("$module_root_directory/defaultuconfig",
6464 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6465 &read_file_cached("$user_module_config_directory/config",
6469 # Export global variables to caller
6470 if ($main::export_to_caller) {
6471 my ($callpkg) = caller();
6472 foreach my $v ('$user_config_directory',
6473 '$user_module_config_directory', '%userconfig') {
6474 my ($vt, $vn) = split('', $v, 2);
6475 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6480 =head2 create_missing_homedir(&uinfo)
6482 If auto homedir creation is enabled, create one for this user if needed.
6483 For internal use only.
6486 sub create_missing_homedir
6489 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6490 # Use has no home dir .. make one
6491 system("mkdir -p ".quotemeta($uinfo->[7]));
6492 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6493 if ($gconfig{'create_homedir_perms'} ne '') {
6494 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6499 =head2 filter_javascript(text)
6501 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6502 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6505 sub filter_javascript
6508 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6509 $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;
6510 $rv =~ s/(javascript:)/x$1/gi;
6511 $rv =~ s/(vbscript:)/x$1/gi;
6515 =head2 resolve_links(path)
6517 Given a path that may contain symbolic links, returns the real path.
6523 $path =~ s/\/+/\//g;
6524 $path =~ s/\/$// if ($path ne "/");
6525 my @p = split(/\/+/, $path);
6527 for(my $i=0; $i<@p; $i++) {
6528 my $sofar = "/".join("/", @p[0..$i]);
6529 my $lnk = readlink($sofar);
6530 if ($lnk eq $sofar) {
6531 # Link to itself! Cannot do anything more really ..
6534 elsif ($lnk =~ /^\//) {
6535 # Link is absolute..
6536 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6540 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6546 =head2 simplify_path(path, bogus)
6548 Given a path, maybe containing elements ".." and "." , convert it to a
6549 clean, absolute form. Returns undef if this is not possible.
6557 my @bits = split(/\/+/, $dir);
6560 foreach my $b (@bits) {
6564 elsif ($b eq "..") {
6566 if (scalar(@fixedbits) == 0) {
6567 # Cannot! Already at root!
6574 push(@fixedbits, $b);
6577 return "/".join('/', @fixedbits);
6580 =head2 same_file(file1, file2)
6582 Returns 1 if two files are actually the same
6587 return 1 if ($_[0] eq $_[1]);
6588 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6589 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6590 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6591 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6592 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6593 return 0 if (!@stat1 || !@stat2);
6594 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6597 =head2 flush_webmin_caches
6599 Clears all in-memory and on-disk caches used by Webmin.
6602 sub flush_webmin_caches
6604 undef(%main::read_file_cache);
6605 undef(%main::acl_hash_cache);
6606 undef(%main::acl_array_cache);
6607 undef(%main::has_command_cache);
6608 undef(@main::list_languages_cache);
6609 undef($main::got_list_usermods_cache);
6610 undef(@main::list_usermods_cache);
6611 undef(%main::foreign_installed_cache);
6612 unlink("$config_directory/module.infos.cache");
6613 &get_all_module_infos();
6616 =head2 list_usermods
6618 Returns a list of additional module restrictions. For internal use in
6624 if (!$main::got_list_usermods_cache) {
6625 @main::list_usermods_cache = ( );
6627 open(USERMODS, "$config_directory/usermin.mods");
6629 if (/^([^:]+):(\+|-|):(.*)/) {
6630 push(@main::list_usermods_cache,
6631 [ $1, $2, [ split(/\s+/, $3) ] ]);
6635 $main::got_list_usermods_cache = 1;
6637 return @main::list_usermods_cache;
6640 =head2 available_usermods(&allmods, &usermods)
6642 Returns a list of modules that are available to the given user, based
6643 on usermod additional/subtractions. For internal use by Usermin only.
6646 sub available_usermods
6648 return @{$_[0]} if (!@{$_[1]});
6650 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6651 my @uinfo = @remote_user_info;
6652 @uinfo = getpwnam($remote_user) if (!@uinfo);
6653 foreach my $u (@{$_[1]}) {
6655 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6658 elsif ($u->[0] =~ /^\@(.*)$/) {
6659 # Check for group membership
6660 my @ginfo = getgrnam($1);
6661 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6662 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6664 elsif ($u->[0] =~ /^\//) {
6665 # Check users and groups in file
6667 open(USERFILE, $u->[0]);
6670 if ($_ eq $remote_user) {
6673 elsif (/^\@(.*)$/) {
6674 my @ginfo = getgrnam($1);
6676 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6677 &indexof($remote_user,
6678 split(/\s+/, $ginfo[3])) >= 0));
6685 if ($u->[1] eq "+") {
6686 map { $mods{$_}++ } @{$u->[2]};
6688 elsif ($u->[1] eq "-") {
6689 map { delete($mods{$_}) } @{$u->[2]};
6693 map { $mods{$_}++ } @{$u->[2]};
6697 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6700 =head2 get_available_module_infos(nocache)
6702 Returns a list of modules available to the current user, based on
6703 operating system support, access control and usermod restrictions. Useful
6704 in themes that need to display a list of modules the user can use.
6705 Each element of the returned array is a hash reference in the same format as
6706 returned by get_module_info.
6709 sub get_available_module_infos
6712 &read_acl(\%acl, \%uacl);
6713 my $risk = $gconfig{'risk_'.$base_remote_user};
6715 foreach my $minfo (&get_all_module_infos($_[0])) {
6716 next if (!&check_os_support($minfo));
6718 # Check module risk level
6719 next if ($risk ne 'high' && $minfo->{'risk'} &&
6720 $minfo->{'risk'} !~ /$risk/);
6724 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6725 !$acl{$base_remote_user,"*"});
6727 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6731 # Check usermod restrictions
6732 my @usermods = &list_usermods();
6733 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6734 &available_usermods(\@rv, \@usermods);
6736 # Check RBAC restrictions
6738 foreach my $m (@rv) {
6739 if (&supports_rbac($m->{'dir'}) &&
6740 &use_rbac_module_acl(undef, $m->{'dir'})) {
6741 local $rbacs = &get_rbac_module_acl($remote_user,
6749 # Module or system doesn't support RBAC
6750 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6756 if (defined(&theme_foreign_available)) {
6757 foreach my $m (@rbacrv) {
6758 if (&theme_foreign_available($m->{'dir'})) {
6767 # Check licence module vetos
6769 if ($main::licence_module) {
6770 foreach my $m (@themerv) {
6771 if (&foreign_call($main::licence_module,
6772 "check_module_licence", $m->{'dir'})) {
6784 =head2 get_visible_module_infos(nocache)
6786 Like get_available_module_infos, but excludes hidden modules from the list.
6787 Each element of the returned array is a hash reference in the same format as
6788 returned by get_module_info.
6791 sub get_visible_module_infos
6794 my $pn = &get_product_name();
6795 return grep { !$_->{'hidden'} &&
6796 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6799 =head2 get_visible_modules_categories(nocache)
6801 Returns a list of Webmin module categories, each of which is a hash ref
6802 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6803 of modules in the category, in the format returned by get_module_info.
6804 Un-used modules are automatically assigned to the 'unused' category, and
6805 those with no category are put into 'others'.
6808 sub get_visible_modules_categories
6811 my @mods = &get_visible_module_infos($nocache);
6813 if (&get_product_name() eq 'webmin') {
6814 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6815 @mods = grep { $_->{'installed'} ne '0' } @mods;
6817 my %cats = &list_categories(\@mods);
6819 foreach my $c (keys %cats) {
6820 my $cat = { 'code' => $c || 'other',
6821 'desc' => $cats{$c} };
6822 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6825 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6826 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6828 # Add un-installed modules in magic category
6829 my $cat = { 'code' => 'unused',
6830 'desc' => $text{'main_unused'},
6832 'modules' => \@unmods };
6838 =head2 is_under_directory(directory, file)
6840 Returns 1 if the given file is under the specified directory, 0 if not.
6841 Symlinks are taken into account in the file to find it's 'real' location.
6844 sub is_under_directory
6846 my ($dir, $file) = @_;
6847 return 1 if ($dir eq "/");
6848 return 0 if ($file =~ /\.\./);
6849 my $ld = &resolve_links($dir);
6851 return &is_under_directory($ld, $file);
6853 my $lp = &resolve_links($file);
6855 return &is_under_directory($dir, $lp);
6857 return 0 if (length($file) < length($dir));
6858 return 1 if ($dir eq $file);
6860 return substr($file, 0, length($dir)) eq $dir;
6863 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6865 Given an absolute URL, returns the host, port, page and ssl flag components.
6866 Relative URLs can also be parsed, if the base information is provided.
6871 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6873 my $ssl = $1 eq 'https';
6874 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6880 elsif ($_[0] =~ /^\/\S*$/) {
6881 # A relative to the server URL
6882 return ($_[1], $_[2], $_[0], $_[4]);
6885 # A relative to the directory URL
6887 $page =~ s/[^\/]+$//;
6888 return ($_[1], $_[2], $page.$_[0], $_[4]);
6892 =head2 check_clicks_function
6894 Returns HTML for a JavaScript function called check_clicks that returns
6895 true when first called, but false subsequently. Useful on onClick for
6896 critical buttons. Deprecated, as this method of preventing duplicate actions
6900 sub check_clicks_function
6905 function check_clicks(form)
6912 for(i=0; i<form.length; i++)
6913 form.elements[i].disabled = true;
6922 =head2 load_entities_map
6924 Returns a hash ref containing mappings between HTML entities (like ouml) and
6925 ascii values (like 246). Mainly for internal use.
6928 sub load_entities_map
6930 if (!%entities_map_cache) {
6932 open(EMAP, "$root_directory/entities_map.txt");
6934 if (/^(\d+)\s+(\S+)/) {
6935 $entities_map_cache{$2} = $1;
6940 return \%entities_map_cache;
6943 =head2 entities_to_ascii(string)
6945 Given a string containing HTML entities like ö and 7, replace them
6946 with their ASCII equivalents.
6949 sub entities_to_ascii
6952 my $emap = &load_entities_map();
6953 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6954 $str =~ s/&#(\d+);/chr($1)/ge;
6958 =head2 get_product_name
6960 Returns either 'webmin' or 'usermin', depending on which program the current
6961 module is in. Useful for modules that can be installed into either.
6964 sub get_product_name
6966 return $gconfig{'product'} if (defined($gconfig{'product'}));
6967 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6972 Returns the character set for the current language, such as iso-8859-1.
6977 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6978 $current_lang_info->{'charset'} ?
6979 $current_lang_info->{'charset'} : $default_charset;
6983 =head2 get_display_hostname
6985 Returns the system's hostname for UI display purposes. This may be different
6986 from the actual hostname if you administrator has configured it so in the
6987 Webmin Configuration module.
6990 sub get_display_hostname
6992 if ($gconfig{'hostnamemode'} == 0) {
6993 return &get_system_hostname();
6995 elsif ($gconfig{'hostnamemode'} == 3) {
6996 return $gconfig{'hostnamedisplay'};
6999 my $h = $ENV{'HTTP_HOST'};
7001 if ($gconfig{'hostnamemode'} == 2) {
7002 $h =~ s/^(www|ftp|mail)\.//i;
7008 =head2 save_module_config([&config], [modulename])
7010 Saves the configuration for some module. The config parameter is an optional
7011 hash reference of names and values to save, which defaults to the global
7012 %config hash. The modulename parameter is the module to update the config
7013 file, which defaults to the current module.
7016 sub save_module_config
7018 my $c = $_[0] || { &get_module_variable('%config') };
7019 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7020 &write_file("$config_directory/$m/config", $c);
7023 =head2 save_user_module_config([&config], [modulename])
7025 Saves the user's Usermin preferences for some module. The config parameter is
7026 an optional hash reference of names and values to save, which defaults to the
7027 global %userconfig hash. The modulename parameter is the module to update the
7028 config file, which defaults to the current module.
7031 sub save_user_module_config
7033 my $c = $_[0] || { &get_module_variable('%userconfig') };
7034 my $m = $_[1] || &get_module_name();
7035 my $ucd = $user_config_directory;
7037 my @uinfo = @remote_user_info ? @remote_user_info
7038 : getpwnam($remote_user);
7039 return if (!@uinfo || !$uinfo[7]);
7040 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7042 &write_file("$ucd/$m/config", $c);
7045 =head2 nice_size(bytes, [min])
7047 Converts a number of bytes into a number followed by a suffix like GB, MB
7048 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7049 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7054 my ($units, $uname);
7055 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7056 $units = 1024*1024*1024*1024;
7059 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7060 $units = 1024*1024*1024;
7063 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7067 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7075 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7077 return $sz." ".$uname;
7080 =head2 get_perl_path
7082 Returns the path to Perl currently in use, such as /usr/bin/perl.
7087 if (open(PERL, "$config_directory/perl-path")) {
7093 return $^X if (-x $^X);
7094 return &has_command("perl");
7097 =head2 get_goto_module([&mods])
7099 Returns the details of a module that the current user should be re-directed
7100 to after logging in, or undef if none. Useful for themes.
7105 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7106 if ($gconfig{'gotomodule'}) {
7107 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7108 return $goto if ($goto);
7110 if (@mods == 1 && $gconfig{'gotoone'}) {
7116 =head2 select_all_link(field, form, [text])
7118 Returns HTML for a 'Select all' link that uses Javascript to select
7119 multiple checkboxes with the same name. The parameters are :
7121 =item field - Name of the checkbox inputs.
7123 =item form - Index of the form on the page.
7125 =item text - Message for the link, defaulting to 'Select all'.
7130 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7131 my ($field, $form, $text) = @_;
7133 $text ||= $text{'ui_selall'};
7134 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7137 =head2 select_invert_link(field, form, text)
7139 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7140 selection on multiple checkboxes with the same name. The parameters are :
7142 =item field - Name of the checkbox inputs.
7144 =item form - Index of the form on the page.
7146 =item text - Message for the link, defaulting to 'Invert selection'.
7149 sub select_invert_link
7151 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7152 my ($field, $form, $text) = @_;
7154 $text ||= $text{'ui_selinv'};
7155 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7158 =head2 select_rows_link(field, form, text, &rows)
7160 Returns HTML for a link that uses Javascript to select rows with particular
7161 values for their checkboxes. The parameters are :
7163 =item field - Name of the checkbox inputs.
7165 =item form - Index of the form on the page.
7167 =item text - Message for the link, de
7169 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7172 sub select_rows_link
7174 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7175 my ($field, $form, $text, $rows) = @_;
7177 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7178 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7179 $js .= "return false;";
7180 return "<a href='#' onClick='$js'>$text</a>";
7183 =head2 check_pid_file(file)
7185 Given a pid file, returns the PID it contains if the process is running.
7190 open(PIDFILE, $_[0]) || return undef;
7191 my $pid = <PIDFILE>;
7193 $pid =~ /^\s*(\d+)/ || return undef;
7194 kill(0, $1) || return undef;
7200 Return the local os-specific library name to this module. For internal use only.
7205 my $mn = &get_module_name();
7206 my $md = &module_root_directory($mn);
7207 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7208 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7210 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7211 return "$mn-$gconfig{'os_type'}-lib.pl";
7213 elsif (-r "$md/$mn-generic-lib.pl") {
7214 return "$mn-generic-lib.pl";
7221 =head2 module_root_directory(module)
7223 Given a module name, returns its root directory. On a typical Webmin install,
7224 all modules are under the same directory - but it is theoretically possible to
7228 sub module_root_directory
7230 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7231 if (@root_directories > 1) {
7232 foreach my $r (@root_directories) {
7238 return "$root_directories[0]/$d";
7241 =head2 list_mime_types
7243 Returns a list of all known MIME types and their extensions, as a list of hash
7244 references with keys :
7246 =item type - The MIME type, like text/plain.
7248 =item exts - A list of extensions, like .doc and .avi.
7250 =item desc - A human-readable description for the MIME type.
7255 if (!@list_mime_types_cache) {
7257 open(MIME, "$root_directory/mime.types");
7261 if (s/#\s*(.*)$//g) {
7264 my ($type, @exts) = split(/\s+/);
7266 push(@list_mime_types_cache, { 'type' => $type,
7273 return @list_mime_types_cache;
7276 =head2 guess_mime_type(filename, [default])
7278 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7279 The optional default parameter sets a default type of use if none is found,
7280 which defaults to application/octet-stream.
7285 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7287 foreach my $t (&list_mime_types()) {
7288 foreach my $e (@{$t->{'exts'}}) {
7289 return $t->{'type'} if (lc($e) eq lc($ext));
7293 return @_ > 1 ? $_[1] : "application/octet-stream";
7296 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7298 Opens a file handle for writing to a temporary file, which will only be
7299 renamed over the real file when the handle is closed. This allows critical
7300 files like /etc/shadow to be updated safely, even if writing fails part way
7301 through due to lack of disk space. The parameters are :
7303 =item handle - File handle to open, as you would use in Perl's open function.
7305 =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.
7307 =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 $! with the error code.
7309 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7311 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7317 # Just getting a temp file
7318 if (!defined($main::open_tempfiles{$_[0]})) {
7319 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7320 my $dir = $1 || "/";
7321 my $tmp = "$dir/$2.webmintmp.$$";
7322 $main::open_tempfiles{$_[0]} = $tmp;
7323 push(@main::temporary_files, $tmp);
7325 return $main::open_tempfiles{$_[0]};
7329 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7330 $fh = &callers_package($fh);
7332 my %gaccess = &get_module_acl(undef, "");
7333 my $db = $gconfig{'debug_what_write'};
7334 if ($file =~ /\r|\n|\0/) {
7335 if ($noerror) { return 0; }
7336 else { &error("Filename contains invalid characters"); }
7338 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7339 # Read-only mode .. veto all writes
7340 print STDERR "vetoing write to $file\n";
7341 return open($fh, ">$null_file");
7343 elsif ($file =~ /^(>|>>|)nul$/i) {
7344 # Write to Windows null device
7345 &webmin_debug_log($1 eq ">" ? "WRITE" :
7346 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7348 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7349 # Writes to /dev/null or TTYs don't need to be handled
7350 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7351 return open($fh, $file);
7353 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7354 &webmin_debug_log("WRITE", $1) if ($db);
7355 # Over-writing a file, via a temp file
7357 $file = &translate_filename($file);
7359 # Open the link target instead
7360 $file = &resolve_links($file);
7363 # Cannot open a directory!
7364 if ($noerror) { return 0; }
7365 else { &error("Cannot write to directory $file"); }
7367 my $tmp = &open_tempfile($file);
7368 my $ex = open($fh, ">$tmp");
7369 if (!$ex && $! =~ /permission/i) {
7370 # Could not open temp file .. try opening actual file
7372 $ex = open($fh, ">$file");
7373 delete($main::open_tempfiles{$file});
7376 $main::open_temphandles{$fh} = $file;
7379 if (!$ex && !$noerror) {
7380 &error(&text("efileopen", $file, $!));
7384 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7385 # Just writing direct to a file
7386 &webmin_debug_log("WRITE", $1) if ($db);
7388 $file = &translate_filename($file);
7389 my @old_attributes = &get_clear_file_attributes($file);
7390 my $ex = open($fh, ">$file");
7391 &reset_file_attributes($file, \@old_attributes);
7392 $main::open_temphandles{$fh} = $file;
7393 if (!$ex && !$noerror) {
7394 &error(&text("efileopen", $file, $!));
7399 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7400 # Appending to a file .. nothing special to do
7401 &webmin_debug_log("APPEND", $1) if ($db);
7403 $file = &translate_filename($file);
7404 my @old_attributes = &get_clear_file_attributes($file);
7405 my $ex = open($fh, ">>$file");
7406 &reset_file_attributes($file, \@old_attributes);
7407 $main::open_temphandles{$fh} = $file;
7408 if (!$ex && !$noerror) {
7409 &error(&text("efileopen", $file, $!));
7414 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7415 # Read mode .. nothing to do here
7416 &webmin_debug_log("READ", $file) if ($db);
7417 $file = &translate_filename($file);
7418 return open($fh, $file);
7420 elsif ($file eq ">" || $file eq ">>") {
7421 my ($package, $filename, $line) = caller;
7422 if ($noerror) { return 0; }
7423 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7426 my ($package, $filename, $line) = caller;
7427 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7432 =head2 close_tempfile(file|handle)
7434 Copies a temp file to the actual file, assuming that all writes were
7435 successful. The handle must have been one passed to open_tempfile.
7441 my $fh = &callers_package($_[0]);
7443 if (defined($file = $main::open_temphandles{$fh})) {
7445 close($fh) || &error(&text("efileclose", $file, $!));
7446 delete($main::open_temphandles{$fh});
7447 return &close_tempfile($file);
7449 elsif (defined($main::open_tempfiles{$_[0]})) {
7451 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7452 my @st = stat($_[0]);
7453 if (&is_selinux_enabled() && &has_command("chcon")) {
7454 # Set original security context
7455 system("chcon --reference=".quotemeta($_[0]).
7456 " ".quotemeta($main::open_tempfiles{$_[0]}).
7457 " >/dev/null 2>&1");
7459 my @old_attributes = &get_clear_file_attributes($_[0]);
7460 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7462 # Set original permissions and ownership
7463 chmod($st[2], $_[0]);
7464 chown($st[4], $st[5], $_[0]);
7466 &reset_file_attributes($_[0], \@old_attributes);
7467 delete($main::open_tempfiles{$_[0]});
7468 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7469 if ($main::open_templocks{$_[0]}) {
7470 &unlock_file($_[0]);
7471 delete($main::open_templocks{$_[0]});
7476 # Must be closing a handle not associated with a file
7482 =head2 print_tempfile(handle, text, ...)
7484 Like the normal print function, but calls &error on failure. Useful when
7485 combined with open_tempfile, to ensure that a criticial file is never
7486 only partially written.
7491 my ($fh, @args) = @_;
7492 $fh = &callers_package($fh);
7493 (print $fh @args) || &error(&text("efilewrite",
7494 $main::open_temphandles{$fh} || $fh, $!));
7497 =head2 is_selinux_enabled
7499 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7502 sub is_selinux_enabled
7504 if (!defined($main::selinux_enabled_cache)) {
7506 if ($gconfig{'os_type'} !~ /-linux$/) {
7507 # Not on linux, so no way
7508 $main::selinux_enabled_cache = 0;
7510 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7511 # Use global config file
7512 $main::selinux_enabled_cache =
7513 $seconfig{'SELINUX'} eq 'disabled' ||
7514 !$seconfig{'SELINUX'} ? 0 : 1;
7517 # Use selinuxenabled command
7518 #$selinux_enabled_cache =
7519 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7520 $main::selinux_enabled_cache = 0;
7523 return $main::selinux_enabled_cache;
7526 =head2 get_clear_file_attributes(file)
7528 Finds file attributes that may prevent writing, clears them and returns them
7529 as a list. May call error. Mainly for internal use by open_tempfile and
7533 sub get_clear_file_attributes
7537 if ($gconfig{'chattr'}) {
7538 # Get original immutable bit
7539 my $out = &backquote_command(
7540 "lsattr ".quotemeta($file)." 2>/dev/null");
7542 $out =~ s/\s\S+\n//;
7543 @old_attributes = grep { $_ ne '-' } split(//, $out);
7545 if (&indexof("i", @old_attributes) >= 0) {
7546 my $err = &backquote_logged(
7547 "chattr -i ".quotemeta($file)." 2>&1");
7549 &error("Failed to remove immutable bit on ".
7554 return @old_attributes;
7557 =head2 reset_file_attributes(file, &attributes)
7559 Put back cleared attributes on some file. May call error. Mainly for internal
7560 use by close_tempfile.
7563 sub reset_file_attributes
7565 my ($file, $old_attributes) = @_;
7566 if (&indexof("i", @$old_attributes) >= 0) {
7567 my $err = &backquote_logged(
7568 "chattr +i ".quotemeta($file)." 2>&1");
7570 &error("Failed to restore immutable bit on ".
7576 =head2 cleanup_tempnames
7578 Remove all temporary files generated using transname. Typically only called
7579 internally when a Webmin script exits.
7582 sub cleanup_tempnames
7584 foreach my $t (@main::temporary_files) {
7587 @main::temporary_files = ( );
7590 =head2 open_lock_tempfile([handle], file, [no-error])
7592 Returns a temporary file for writing to some actual file, and also locks it.
7593 Effectively the same as calling lock_file and open_tempfile on the same file,
7594 but calls the unlock for you automatically when it is closed.
7597 sub open_lock_tempfile
7599 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7600 $fh = &callers_package($fh);
7601 my $lockfile = $file;
7602 $lockfile =~ s/^[^\/]*//;
7603 if ($lockfile =~ /^\//) {
7604 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7606 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7611 $main::end_exit_status ||= $?;
7612 if ($$ == $main::initial_process_id) {
7613 # Exiting from initial process
7614 &cleanup_tempnames();
7615 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7616 $main::debug_log_start_module eq &get_module_name()) {
7617 my $len = time() - $main::debug_log_start_time;
7618 &webmin_debug_log("STOP", "runtime=$len");
7619 $main::debug_log_start_time = 0;
7621 if (!$ENV{'SCRIPT_NAME'} &&
7622 $main::initial_module_name eq &get_module_name()) {
7623 # In a command-line script - call the real exit, so that the
7624 # exit status gets properly propogated. In some cases this
7625 # was not happening.
7626 exit($main::end_exit_status);
7631 =head2 month_to_number(month)
7633 Converts a month name like feb to a number like 1.
7638 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7641 =head2 number_to_month(number)
7643 Converts a number like 1 to a month name like Feb.
7648 return ucfirst($number_to_month_map{$_[0]});
7651 =head2 get_rbac_module_acl(user, module)
7653 Returns a hash reference of RBAC overrides ACLs for some user and module.
7654 May return undef if none exist (indicating access denied), or the string *
7655 if full access is granted.
7658 sub get_rbac_module_acl
7660 my ($user, $mod) = @_;
7661 eval "use Authen::SolarisRBAC";
7662 return undef if ($@);
7665 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7666 # Automagic webmin.modulename.admin authorization exists .. allow access
7668 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7669 %rv = ( 'noconfig' => 1 );
7676 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7680 my ($auths, $acls) = split(/\s+/, $_);
7681 my @auths = split(/,/, $auths);
7683 my ($merge) = ($acls =~ s/^\+//);
7685 if ($auths eq "*") {
7686 # These ACLs apply to all RBAC users.
7687 # Only if there is some that match a specific authorization
7688 # later will they be used though.
7691 # Check each of the RBAC authorizations
7692 foreach my $a (@auths) {
7693 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7698 $foundany++ if ($gotall);
7701 # Found an RBAC authorization - return the ACLs
7702 return "*" if ($acls eq "*");
7703 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7705 # Just add to current set
7706 foreach my $a (keys %acl) {
7717 return !$foundany ? undef : %rv ? \%rv : undef;
7720 =head2 supports_rbac([module])
7722 Returns 1 if RBAC client support is available, such as on Solaris.
7727 return 0 if ($gconfig{'os_type'} ne 'solaris');
7728 eval "use Authen::SolarisRBAC";
7731 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7736 =head2 use_rbac_module_acl(user, module)
7738 Returns 1 if some user should use RBAC to get permissions for a module
7741 sub use_rbac_module_acl
7743 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7744 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7745 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7746 my %access = &get_module_acl($u, $m, 1);
7747 return $access{'rbac'} ? 1 : 0;
7750 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7752 Runs some command, possibly feeding it input and capturing output to the
7753 give files or scalar references. The parameters are :
7755 =item command - Full command to run, possibly including shell meta-characters.
7757 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7759 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7761 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7763 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7765 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7770 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7771 if (&is_readonly_mode() && !$safe) {
7772 print STDERR "Vetoing command $_[0]\n";
7776 $cmd = &translate_command($cmd);
7778 # Use ` operator where possible
7779 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7780 if (!$stdin && ref($stdout) && !$stderr) {
7781 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7782 $$stdout = `$cmd 2>$null_file`;
7785 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7786 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7787 $$stdout = `$cmd 2>&1`;
7790 elsif (!$stdin && !$stdout && !$stderr) {
7791 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7792 return system("$cmd >$null_file 2>$null_file <$null_file");
7796 $| = 1; # needed on some systems to flush before forking
7797 pipe(EXECSTDINr, EXECSTDINw);
7798 pipe(EXECSTDOUTr, EXECSTDOUTw);
7799 pipe(EXECSTDERRr, EXECSTDERRw);
7801 if (!($pid = fork())) {
7805 open(STDIN, "<&EXECSTDINr");
7806 open(STDOUT, ">&EXECSTDOUTw");
7807 if (ref($stderr) && $stderr eq $stdout) {
7808 open(STDERR, ">&EXECSTDOUTw");
7811 open(STDERR, ">&EXECSTDERRw");
7818 my $fullcmd = "($cmd)";
7819 if ($stdin && !ref($stdin)) {
7820 $fullcmd .= " <$stdin";
7822 if ($stdout && !ref($stdout)) {
7823 $fullcmd .= " >$stdout";
7825 if ($stderr && !ref($stderr)) {
7826 if ($stderr eq $stdout) {
7827 $fullcmd .= " 2>&1";
7830 $fullcmd .= " 2>$stderr";
7833 if ($gconfig{'os_type'} eq 'windows') {
7837 exec("/bin/sh", "-c", $fullcmd);
7839 print "Exec failed : $!\n";
7846 # Feed input and capture output
7848 if ($stdin && ref($stdin)) {
7849 print EXECSTDINw $$stdin;
7852 if ($stdout && ref($stdout)) {
7854 while(<EXECSTDOUTr>) {
7859 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7861 while(<EXECSTDERRr>) {
7872 =head2 open_readfile(handle, file)
7874 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7875 exactly the same as Perl's open function.
7880 my ($fh, $file) = @_;
7881 $fh = &callers_package($fh);
7882 my $realfile = &translate_filename($file);
7883 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7884 return open($fh, "<".$realfile);
7887 =head2 open_execute_command(handle, command, output?, safe?)
7889 Runs some command, with the specified file handle set to either write to it if
7890 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7891 indicates if the command modifies the state of the system or not.
7894 sub open_execute_command
7896 my ($fh, $cmd, $mode, $safe) = @_;
7897 $fh = &callers_package($fh);
7898 my $realcmd = &translate_command($cmd);
7899 if (&is_readonly_mode() && !$safe) {
7900 # Don't actually run it
7901 print STDERR "vetoing command $cmd\n";
7904 return open($fh, ">$null_file");
7907 return open($fh, $null_file);
7911 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7912 if ($gconfig{'debug_what_cmd'});
7914 return open($fh, "| $cmd");
7916 elsif ($mode == 1) {
7917 return open($fh, "$cmd 2>$null_file |");
7919 elsif ($mode == 2) {
7920 return open($fh, "$cmd 2>&1 |");
7924 =head2 translate_filename(filename)
7926 Applies all relevant registered translation functions to a filename. Mostly
7927 for internal use, and typically does nothing.
7930 sub translate_filename
7932 my ($realfile) = @_;
7933 my @funcs = grep { $_->[0] eq &get_module_name() ||
7934 !defined($_->[0]) } @main::filename_callbacks;
7935 foreach my $f (@funcs) {
7937 $realfile = &$func($realfile, @{$f->[2]});
7942 =head2 translate_command(filename)
7944 Applies all relevant registered translation functions to a command. Mostly
7945 for internal use, and typically does nothing.
7948 sub translate_command
7951 my @funcs = grep { $_->[0] eq &get_module_name() ||
7952 !defined($_->[0]) } @main::command_callbacks;
7953 foreach my $f (@funcs) {
7955 $realcmd = &$func($realcmd, @{$f->[2]});
7960 =head2 register_filename_callback(module|undef, &function, &args)
7962 Registers some function to be called when the specified module (or all
7963 modules) tries to open a file for reading and writing. The function must
7964 return the actual file to open. This allows you to override which files
7965 other code actually operates on, via the translate_filename function.
7968 sub register_filename_callback
7970 my ($mod, $func, $args) = @_;
7971 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7974 =head2 register_command_callback(module|undef, &function, &args)
7976 Registers some function to be called when the specified module (or all
7977 modules) tries to execute a command. The function must return the actual
7978 command to run. This allows you to override which commands other other code
7979 actually runs, via the translate_command function.
7982 sub register_command_callback
7984 my ($mod, $func, $args) = @_;
7985 push(@main::command_callbacks, [ $mod, $func, $args ]);
7988 =head2 capture_function_output(&function, arg, ...)
7990 Captures output that some function prints to STDOUT, and returns it. Useful
7991 for functions outside your control that print data when you really want to
7992 manipulate it before output.
7995 sub capture_function_output
7997 my ($func, @args) = @_;
7998 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
7999 my $old = select(SOCKET1);
8000 my @rv = &$func(@args);
8009 return wantarray ? ($out, \@rv) : $out;
8012 =head2 capture_function_output_tempfile(&function, arg, ...)
8014 Behaves the same as capture_function_output, but uses a temporary file
8015 to avoid buffer full problems.
8018 sub capture_function_output_tempfile
8020 my ($func, @args) = @_;
8021 my $temp = &transname();
8022 open(BUFFER, ">$temp");
8023 my $old = select(BUFFER);
8024 my @rv = &$func(@args);
8027 my $out = &read_file_contents($temp);
8028 &unlink_file($temp);
8029 return wantarray ? ($out, \@rv) : $out;
8032 =head2 modules_chooser_button(field, multiple, [form])
8034 Returns HTML for a button for selecting one or many Webmin modules.
8035 field - Name of the HTML field to place the module names into.
8036 multiple - Set to 1 if multiple modules can be selected.
8037 form - Index of the form on the page.
8040 sub modules_chooser_button
8042 return &theme_modules_chooser_button(@_)
8043 if (defined(&theme_modules_chooser_button));
8044 my $form = defined($_[2]) ? $_[2] : 0;
8045 my $w = $_[1] ? 700 : 500;
8047 if ($_[1] && $gconfig{'db_sizemodules'}) {
8048 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8050 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8051 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8053 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";
8056 =head2 substitute_template(text, &hash)
8058 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8059 the text replaces it with the value of the hash key foo. Also supports blocks
8060 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8061 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8064 sub substitute_template
8066 # Add some extra fixed parameters to the hash
8067 my %hash = %{$_[1]};
8068 $hash{'hostname'} = &get_system_hostname();
8069 $hash{'webmin_config'} = $config_directory;
8070 $hash{'webmin_etc'} = $config_directory;
8071 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8072 $hash{'webmin_var'} = $var_directory;
8074 # Add time-based parameters, for use in DNS
8075 $hash{'current_time'} = time();
8076 my @tm = localtime($hash{'current_time'});
8077 $hash{'current_year'} = $tm[5]+1900;
8078 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8079 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8080 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8081 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8082 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8084 # Actually do the substition
8086 foreach my $s (keys %hash) {
8087 next if ($s eq ''); # Prevent just $ from being subbed
8090 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8091 $rv =~ s/\$\Q$us\E/$sv/g;
8093 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8094 # and ${IF}..${ENDIF} with value
8095 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8096 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8098 # Replace $IF..$ELSE..$ENDIF block with first value,
8099 # and $IF..$ENDIF with value
8100 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8101 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8103 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8104 # matching, nothing if not
8105 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8106 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8108 # Replace $IFEQ..$ENDIFEQ block with first value if
8109 # matching, nothing if not
8110 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8111 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8114 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8115 # and ${IF}..${ENDIF} with nothing
8116 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8117 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8119 # Replace $IF..$ELSE..$ENDIF block with second value,
8120 # and $IF..$ENDIF with nothing
8121 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8122 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8124 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8125 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8126 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8130 # Now assume any $IF blocks whose variables are not present in the hash
8131 # evaluate to false.
8132 # $IF...$ELSE x $ENDIF => x
8133 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8134 # $IF...x...$ENDIF => (nothing)
8135 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8136 # ${var} => (nothing)
8137 $rv =~ s/\$\{[A-Z]+\}//g;
8142 =head2 running_in_zone
8144 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8145 disable module and features that are not appropriate, like those that modify
8146 mounted filesystems.
8151 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8152 $gconfig{'os_version'} < 10);
8153 my $zn = `zonename 2>$null_file`;
8155 return $zn && $zn ne "global";
8158 =head2 running_in_vserver
8160 Returns 1 if the current Webmin instance is running in a Linux VServer.
8161 Used to disable modules and features that are not appropriate.
8164 sub running_in_vserver
8166 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8169 open(MTAB, "/etc/mtab");
8171 my ($dev, $mp) = split(/\s+/, $_);
8172 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8181 =head2 running_in_xen
8183 Returns 1 if Webmin is running inside a Xen instance, by looking
8184 at /proc/xen/capabilities.
8189 return 0 if (!-r "/proc/xen/capabilities");
8190 my $cap = &read_file_contents("/proc/xen/capabilities");
8191 return $cap =~ /control_d/ ? 0 : 1;
8194 =head2 running_in_openvz
8196 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8197 at /proc/vz/veinfo for a non-zero line.
8200 sub running_in_openvz
8202 return 0 if (!-r "/proc/vz/veinfo");
8203 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8204 return 0 if (!$lref || !@$lref);
8205 foreach my $l (@$lref) {
8207 my @ll = split(/\s+/, $l);
8208 return 0 if ($ll[0] eq '0');
8213 =head2 list_categories(&modules, [include-empty])
8215 Returns a hash mapping category codes to names, including any custom-defined
8216 categories. The modules parameter must be an array ref of module hash objects,
8217 as returned by get_all_module_infos.
8222 my ($mods, $empty) = @_;
8223 my (%cats, %catnames);
8224 &read_file("$config_directory/webmin.catnames", \%catnames);
8225 foreach my $o (@lang_order_list) {
8226 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8231 foreach my $m (@$mods) {
8232 my $c = $m->{'category'};
8233 next if ($cats{$c});
8234 if (defined($catnames{$c})) {
8235 $cats{$c} = $catnames{$c};
8237 elsif ($text{"category_$c"}) {
8238 $cats{$c} = $text{"category_$c"};
8241 # try to get category name from module ..
8242 my %mtext = &load_language($m->{'dir'});
8243 if ($mtext{"category_$c"}) {
8244 $cats{$c} = $mtext{"category_$c"};
8247 $c = $m->{'category'} = "";
8248 $cats{$c} = $text{"category_$c"};
8255 =head2 is_readonly_mode
8257 Returns 1 if the current user is in read-only mode, and thus all writes
8258 to files and command execution should fail.
8261 sub is_readonly_mode
8263 if (!defined($main::readonly_mode_cache)) {
8264 my %gaccess = &get_module_acl(undef, "");
8265 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8267 return $main::readonly_mode_cache;
8270 =head2 command_as_user(user, with-env?, command, ...)
8272 Returns a command to execute some command as the given user, using the
8273 su statement. If on Linux, the /bin/sh shell is forced in case the user
8274 does not have a valid shell. If with-env is set to 1, the -s flag is added
8275 to the su command to read the user's .profile or .bashrc file.
8280 my ($user, $env, @args) = @_;
8281 my @uinfo = getpwnam($user);
8282 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8283 # User shell doesn't appear to be valid
8284 if ($gconfig{'os_type'} =~ /-linux$/) {
8285 # Use -s /bin/sh to force it
8286 $shellarg = " -s /bin/sh";
8288 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8289 $gconfig{'os_type'} eq 'solaris' &&
8290 $gconfig{'os_version'} >= 11 ||
8291 $gconfig{'os_type'} eq 'macos') {
8292 # Use -m and force /bin/sh
8293 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8297 my $rv = "su".($env ? " -" : "").$shellarg.
8298 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8302 =head2 list_osdn_mirrors(project, file)
8304 This function is now deprecated in favor of letting sourceforge just
8305 redirect to the best mirror, and now just returns their primary download URL.
8308 sub list_osdn_mirrors
8310 my ($project, $file) = @_;
8311 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8313 'mirror' => 'downloads' } );
8316 =head2 convert_osdn_url(url)
8318 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8319 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8320 to a real URL on the sourceforge download redirector.
8323 sub convert_osdn_url
8326 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8327 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8328 # Always use the Sourceforge mail download URL, which does
8329 # a location-based redirect for us
8330 my ($project, $file) = ($1, $2);
8331 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8333 return wantarray ? ( $url, 0 ) : $url;
8336 # Some other source .. don't change
8337 return wantarray ? ( $url, 2 ) : $url;
8341 =head2 get_current_dir
8343 Returns the directory the current process is running in.
8349 if ($gconfig{'os_type'} eq 'windows') {
8362 =head2 supports_users
8364 Returns 1 if the current OS supports Unix user concepts and functions like
8365 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8371 return $gconfig{'os_type'} ne 'windows';
8374 =head2 supports_symlinks
8376 Returns 1 if the current OS supports symbolic and hard links. This will not
8377 be the case on Windows.
8380 sub supports_symlinks
8382 return $gconfig{'os_type'} ne 'windows';
8385 =head2 quote_path(path)
8387 Returns a path with safe quoting for the current operating system.
8393 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8394 # Windows only supports "" style quoting
8398 return quotemeta($path);
8402 =head2 get_windows_root
8404 Returns the base windows system directory, like c:/windows.
8407 sub get_windows_root
8409 if ($ENV{'SystemRoot'}) {
8410 my $rv = $ENV{'SystemRoot'};
8415 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8419 =head2 read_file_contents(file)
8421 Given a filename, returns its complete contents as a string. Effectively
8422 the same as the Perl construct `cat file`.
8425 sub read_file_contents
8427 &open_readfile(FILE, $_[0]) || return undef;
8434 =head2 unix_crypt(password, salt)
8436 Performs Unix encryption on a password, using the built-in crypt function or
8437 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8438 must be either an already-hashed password, or a two-character alpha-numeric
8444 my ($pass, $salt) = @_;
8445 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8446 my $rv = eval "crypt(\$pass, \$salt)";
8448 return $rv if ($rv && !$@);
8449 eval "use Crypt::UnixCrypt";
8451 return Crypt::UnixCrypt::crypt($pass, $salt);
8454 &error("Failed to encrypt password : $err");
8458 =head2 split_quoted_string(string)
8460 Given a string like I<foo "bar baz" quux>, returns the array :
8464 sub split_quoted_string
8468 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8469 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8470 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8477 =head2 write_to_http_cache(url, file|&data)
8479 Updates the Webmin cache with the contents of the given file, possibly also
8480 clearing out old data. Mainly for internal use by http_download.
8483 sub write_to_http_cache
8485 my ($url, $file) = @_;
8486 return 0 if (!$gconfig{'cache_size'});
8488 # Don't cache downloads that look dynamic
8489 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8493 # Check if the current module should do caching
8494 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8495 # Caching all except some modules
8496 my @mods = split(/\s+/, $1);
8497 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8499 elsif ($gconfig{'cache_mods'}) {
8500 # Only caching some modules
8501 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8502 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8508 $size = length($$file);
8511 my @st = stat($file);
8515 if ($size > $gconfig{'cache_size'}) {
8516 # Bigger than the whole cache - so don't save it
8521 $cfile = "$main::http_cache_directory/$cfile";
8523 # See how much we have cached currently, clearing old files
8525 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8526 opendir(CACHEDIR, $main::http_cache_directory);
8527 foreach my $f (readdir(CACHEDIR)) {
8528 next if ($f eq "." || $f eq "..");
8529 my $path = "$main::http_cache_directory/$f";
8530 my @st = stat($path);
8531 if ($gconfig{'cache_days'} &&
8532 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8533 # This file is too old .. trash it
8538 push(@cached, [ $path, $st[7], $st[9] ]);
8542 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8543 while($total+$size > $gconfig{'cache_size'} && @cached) {
8544 # Cache is too big .. delete some files until the new one will fit
8545 unlink($cached[0]->[0]);
8546 $total -= $cached[0]->[1];
8550 # Finally, write out the new file
8552 &open_tempfile(CACHEFILE, ">$cfile");
8553 &print_tempfile(CACHEFILE, $$file);
8554 &close_tempfile(CACHEFILE);
8557 my ($ok, $err) = ©_source_dest($file, $cfile);
8563 =head2 check_in_http_cache(url)
8565 If some URL is in the cache and valid, return the filename for it. Mainly
8566 for internal use by http_download.
8569 sub check_in_http_cache
8572 return undef if (!$gconfig{'cache_size'});
8574 # Check if the current module should do caching
8575 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8576 # Caching all except some modules
8577 my @mods = split(/\s+/, $1);
8578 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8580 elsif ($gconfig{'cache_mods'}) {
8581 # Only caching some modules
8582 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8583 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8588 $cfile = "$main::http_cache_directory/$cfile";
8589 my @st = stat($cfile);
8590 return undef if (!@st || !$st[7]);
8591 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8596 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8601 =head2 supports_javascript
8603 Returns 1 if the current browser is assumed to support javascript.
8606 sub supports_javascript
8608 if (defined(&theme_supports_javascript)) {
8609 return &theme_supports_javascript();
8611 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8614 =head2 get_module_name
8616 Returns the name of the Webmin module that called this function. For internal
8617 use only by other API functions.
8622 return &get_module_variable('$module_name');
8625 =head2 get_module_variable(name, [ref])
8627 Returns the value of some variable which is set in the caller's context, if
8628 using the new WebminCore package. For internal use only.
8631 sub get_module_variable
8633 my ($v, $wantref) = @_;
8634 my $slash = $wantref ? "\\" : "";
8635 my $thispkg = &web_libs_package();
8636 if ($thispkg eq 'WebminCore') {
8637 my ($vt, $vn) = split('', $v, 2);
8639 for(my $i=0; ($callpkg) = caller($i); $i++) {
8640 last if ($callpkg ne $thispkg);
8642 return eval "${slash}${vt}${callpkg}::${vn}";
8644 return eval "${slash}${v}";
8647 =head2 clear_time_locale()
8649 Temporarily force the locale to C, until reset_time_locale is called. This is
8650 useful if your code is going to call C<strftime> from the POSIX package, and
8651 you want to ensure that the output is in a consistent format.
8654 sub clear_time_locale
8656 if ($main::clear_time_locale_count == 0) {
8659 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8660 POSIX::setlocale(POSIX::LC_TIME, "C");
8663 $main::clear_time_locale_count++;
8666 =head2 reset_time_locale()
8668 Revert the locale to whatever it was before clear_time_locale was called
8671 sub reset_time_locale
8673 if ($main::clear_time_locale_count == 1) {
8675 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8676 $main::clear_time_locale_old = undef;
8679 $main::clear_time_locale_count--;
8682 =head2 callers_package(filehandle)
8684 Convert a non-module filehandle like FOO to one qualified with the
8685 caller's caller's package, like fsdump::FOO. For internal use only.
8691 my $callpkg = (caller(1))[0];
8692 my $thispkg = &web_libs_package();
8693 if (!ref($fh) && $fh !~ /::/ &&
8694 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8695 $fh = $callpkg."::".$fh;
8700 =head2 web_libs_package()
8702 Returns the package this code is in. We can't always trust __PACKAGE__. For
8706 sub web_libs_package
8708 if ($called_from_webmin_core) {
8709 return "WebminCore";
8714 $done_web_lib_funcs = 1;