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 $pid = $ENV{'MINISERV_PID'};
1794 open(PID, $miniserv{'pidfile'}) ||
1795 &error("Failed to open PID file $miniserv{'pidfile'}");
1798 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1801 # Just signal miniserv to restart
1802 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1804 # Wait till new PID is written, indicating a restart
1805 for($i=0; $i<60; $i++) {
1807 my @newst = stat($miniserv{'pidfile'});
1808 last if ($newst[9] != $oldst[9]);
1810 $i < 60 || &error("Webmin server did not write new PID file");
1812 ## Totally kill the process and re-run it
1813 #$SIG{'TERM'} = 'IGNORE';
1814 #&kill_logged('TERM', $pid);
1815 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1818 # On Windows, we need to use the flag file
1819 open(TOUCH, ">$miniserv{'restartflag'}");
1824 # wait for miniserv to come back up
1825 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1827 for($i=0; $i<20; $i++) {
1829 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1830 my $rv = connect(STEST,
1831 pack_sockaddr_in($miniserv{'port'}, $addr));
1833 last if ($rv && ++$ok >= 2);
1835 $i < 20 || &error("Failed to restart Webmin server!");
1839 =head2 reload_miniserv
1841 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1842 configuration files. Not all changes will be applied though, such as the
1843 IP addresses and ports to accept connections on.
1848 return undef if (&is_readonly_mode());
1850 &get_miniserv_config(\%miniserv) || return;
1852 if ($gconfig{'os_type'} ne 'windows') {
1853 # Send a USR1 signal to re-read the config
1854 my ($pid, $addr, $i);
1855 $miniserv{'inetd'} && return;
1856 $pid = $ENV{'MINISERV_PID'};
1858 open(PID, $miniserv{'pidfile'}) ||
1859 &error("Failed to open PID file $miniserv{'pidfile'}");
1862 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1864 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1866 # Make sure this didn't kill Webmin!
1868 if (!kill(0, $pid)) {
1869 print STDERR "USR1 signal killed Webmin - restarting\n";
1870 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1874 # On Windows, we need to use the flag file
1875 open(TOUCH, ">$miniserv{'reloadflag'}");
1880 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1882 Returns 1 if some module is supported on the current operating system, or the
1883 OS supplies as parameters. The parameters are :
1885 =item minfo - A hash ref of module information, as returned by get_module_info
1887 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1889 =item os-version - The Webmin OS version to use, such as 13.0
1891 =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.
1894 sub check_os_support
1896 my $oss = $_[0]->{'os_support'};
1897 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1898 # May provide usable API
1899 $oss .= " ".$_[0]->{'api_os_support'};
1901 if ($_[0]->{'nozone'} && &running_in_zone()) {
1902 # Not supported in a Solaris Zone
1905 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1906 # Not supported in a Linux Vserver
1909 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1910 # Not supported in an OpenVZ container
1913 return 1 if (!$oss || $oss eq '*');
1914 my $osver = $_[2] || $gconfig{'os_version'};
1915 my $ostype = $_[1] || $gconfig{'os_type'};
1918 my ($os, $ver, $codes);
1919 my ($neg) = ($oss =~ s/^!//); # starts with !
1920 $anyneg++ if ($neg);
1921 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1923 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1925 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1927 $os = $1; $ver = $2; $oss = $3;
1929 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1931 $os = $1; $codes = $2; $oss = $3;
1933 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1935 $codes = $1; $oss = $2;
1937 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1939 $os = $1; $oss = $2;
1942 next if ($os && !($os eq $ostype ||
1943 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1944 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1945 next if ($osver < $1 || $osver > $2);
1947 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1948 next if ($osver < $1);
1950 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1951 next if ($osver > $1);
1954 next if ($ver ne $osver);
1956 next if ($codes && !eval $codes);
1962 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1964 Downloads data from a HTTP url to a local file or string. The parameters are :
1966 =item host - The hostname part of the URL, such as www.google.com
1968 =item port - The HTTP port number, such as 80
1970 =item page - The filename part of the URL, like /index.html
1972 =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.
1974 =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.
1976 =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.
1978 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
1980 =item user - If set, HTTP authentication is done with this username.
1982 =item pass - The HTTP password to use with the username above.
1984 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
1986 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
1988 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
1990 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
1995 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
1996 $timeout, $osdn, $nocache, $headers) = @_;
1997 if ($gconfig{'debug_what_net'}) {
1998 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
1999 ($user ? " user=$user pass=$pass" : "").
2000 (ref($dest) ? "" : " dest=$dest"));
2003 # Convert OSDN URL first
2004 my $prot = $ssl ? "https://" : "http://";
2005 my $portstr = $ssl && $port == 443 ||
2006 !$ssl && $port == 80 ? "" : ":$port";
2007 ($host, $port, $page, $ssl) = &parse_http_url(
2008 &convert_osdn_url($prot.$host.$portstr.$page));
2011 # Check if we already have cached the URL
2012 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2013 my $cfile = &check_in_http_cache($url);
2014 if ($cfile && !$nocache) {
2015 # Yes! Copy to dest file or variable
2016 &$cbfunc(6, $url) if ($cbfunc);
2018 &open_readfile(CACHEFILE, $cfile);
2020 $$dest = <CACHEFILE>;
2024 ©_source_dest($cfile, $dest);
2031 push(@headers, [ "Host", $host ]);
2032 push(@headers, [ "User-agent", "Webmin" ]);
2033 push(@headers, [ "Accept-language", "en" ]);
2035 my $auth = &encode_base64("$user:$pass");
2036 $auth =~ tr/\r\n//d;
2037 push(@headers, [ "Authorization", "Basic $auth" ]);
2039 foreach my $hname (keys %$headers) {
2040 push(@headers, [ $hname, $headers->{$hname} ]);
2043 # Actually download it
2044 $main::download_timed_out = undef;
2045 local $SIG{ALRM} = \&download_timeout;
2046 alarm($timeout || 60);
2047 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2049 $h = $main::download_timed_out if ($main::download_timed_out);
2051 if ($error) { $$error = $h; return; }
2052 else { &error($h); }
2054 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2055 $headers, $ssl, $nocache);
2056 if ((!$error || !$$error) && !$nocache) {
2057 &write_to_http_cache($url, $dest);
2061 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2063 Do a HTTP download, after the headers have been sent. For internal use only,
2064 typically called by http_download.
2067 sub complete_http_download
2069 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2075 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2076 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2078 if ($_[2]) { ${$_[2]} = $line; return; }
2079 else { &error("Download failed : $line"); }
2082 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2085 $line = &read_http_connection($_[0]);
2086 $line =~ tr/\r\n//d;
2087 $line =~ /^(\S+):\s+(.*)$/ || last;
2088 $header{lc($1)} = $2;
2089 push(@headers, [ lc($1), $2 ]);
2092 if ($main::download_timed_out) {
2093 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2094 else { &error($main::download_timed_out); }
2096 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2097 if ($rcode >= 300 && $rcode < 400) {
2098 # follow the redirect
2099 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2100 my ($host, $port, $page, $ssl);
2101 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2102 $ssl = $1 eq 'https' ? 1 : 0;
2103 $host = $2; $port = $3; $page = $4 || "/";
2105 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2106 $ssl = $1 eq 'https' ? 1 : 0;
2107 $host = $2; $port = 80; $page = $3 || "/";
2109 elsif ($header{'location'} =~ /^\// && $_[5]) {
2110 # Relative to same server
2114 $page = $header{'location'};
2116 elsif ($header{'location'}) {
2117 # Assume relative to same dir .. not handled
2118 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2119 else { &error("Invalid Location header $header{'location'}"); }
2122 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2123 else { &error("Missing Location header"); }
2126 ($page, $params) = split(/\?/, $page);
2128 $page .= "?".$params if (defined($params));
2129 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2130 undef, undef, undef, $_[4], $_[9], $_[7]);
2135 # Append to a variable
2136 while(defined($buf = &read_http_connection($_[0], 1024))) {
2138 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2144 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2145 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2146 else { &error("Failed to write to $_[1] : $!"); }
2148 binmode(PFILE); # For windows
2149 while(defined($buf = &read_http_connection($_[0], 1024))) {
2150 &print_tempfile(PFILE, $buf);
2151 $got += length($buf);
2152 &$cbfunc(3, $got) if ($cbfunc);
2154 &close_tempfile(PFILE);
2155 if ($header{'content-length'} &&
2156 $got != $header{'content-length'}) {
2157 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2158 else { &error("Download incomplete"); }
2161 &$cbfunc(4) if ($cbfunc);
2163 &close_http_connection($_[0]);
2167 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2169 Download data from an FTP site to a local file. The parameters are :
2171 =item host - FTP server hostname
2173 =item file - File on the FTP server to download
2175 =item destfile - File on the Webmin system to download data to
2177 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2179 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2181 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2183 =item pass - Password for the username above.
2185 =item port - FTP server port number, which defaults to 21 if not set.
2190 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2192 if ($gconfig{'debug_what_net'}) {
2193 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2194 ($user ? " user=$user pass=$pass" : "").
2195 (ref($dest) ? "" : " dest=$dest"));
2199 if (&is_readonly_mode()) {
2200 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2202 else { &error("FTP connections not allowed in readonly mode"); }
2205 # Check if we already have cached the URL
2206 my $url = "ftp://".$host.$file;
2207 my $cfile = &check_in_http_cache($url);
2209 # Yes! Copy to dest file or variable
2210 &$cbfunc(6, $url) if ($cbfunc);
2212 &open_readfile(CACHEFILE, $cfile);
2214 $$dest = <CACHEFILE>;
2218 ©_source_dest($cfile, $dest);
2223 # Actually download it
2224 $main::download_timed_out = undef;
2225 local $SIG{ALRM} = \&download_timeout;
2228 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2229 # download through http-style proxy
2231 if (&open_socket($1, $2, "SOCK", \$error)) {
2233 if ($main::download_timed_out) {
2235 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2236 else { &error($main::download_timed_out); }
2238 my $esc = $_[1]; $esc =~ s/ /%20/g;
2239 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2240 my $portstr = $port == 21 ? "" : ":$port";
2241 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2242 print SOCK "User-agent: Webmin\r\n";
2243 if ($gconfig{'proxy_user'}) {
2244 my $auth = &encode_base64(
2245 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2246 $auth =~ tr/\r\n//d;
2247 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2250 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2253 elsif (!$gconfig{'proxy_fallback'}) {
2255 if ($error) { $$error = $main::download_timed_out; return 0; }
2256 else { &error($main::download_timed_out); }
2261 # connect to host and login with real FTP protocol
2262 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2264 if ($main::download_timed_out) {
2265 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2266 else { &error($main::download_timed_out); }
2268 &ftp_command("", 2, $_[3]) || return 0;
2270 # Login as supplied user
2271 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2273 if (int($urv[1]/100) == 3) {
2274 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2278 # Login as anonymous
2279 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2281 if (int($urv[1]/100) == 3) {
2282 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2286 &$cbfunc(1, 0) if ($cbfunc);
2289 # get the file size and tell the callback
2290 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2291 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2292 defined($size) || return 0;
2294 &$cbfunc(2, int($size));
2298 my $pasv = &ftp_command("PASV", 2, $_[3]);
2299 defined($pasv) || return 0;
2300 $pasv =~ /\(([0-9,]+)\)/;
2301 @n = split(/,/ , $1);
2302 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2303 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2304 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2308 &open_tempfile(PFILE, ">$_[2]", 1);
2309 while(read(CON, $buf, 1024) > 0) {
2310 &print_tempfile(PFILE, $buf);
2311 $got += length($buf);
2312 &$cbfunc(3, $got) if ($cbfunc);
2314 &close_tempfile(PFILE);
2316 if ($got != $size) {
2317 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2318 else { &error("Download incomplete"); }
2320 &$cbfunc(4) if ($cbfunc);
2322 &ftp_command("", 2, $_[3]) || return 0;
2326 &ftp_command("QUIT", 2, $_[3]) || return 0;
2330 &write_to_http_cache($url, $dest);
2334 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2336 Upload data from a local file to an FTP site. The parameters are :
2338 =item host - FTP server hostname
2340 =item file - File on the FTP server to write to
2342 =item srcfile - File on the Webmin system to upload data from
2344 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2346 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2348 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2350 =item pass - Password for the username above.
2352 =item port - FTP server port number, which defaults to 21 if not set.
2359 if (&is_readonly_mode()) {
2360 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2362 else { &error("FTP connections not allowed in readonly mode"); }
2365 $main::download_timed_out = undef;
2366 local $SIG{ALRM} = \&download_timeout;
2369 # connect to host and login
2370 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2372 if ($main::download_timed_out) {
2373 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2374 else { &error($main::download_timed_out); }
2376 &ftp_command("", 2, $_[3]) || return 0;
2378 # Login as supplied user
2379 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2381 if (int($urv[1]/100) == 3) {
2382 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2386 # Login as anonymous
2387 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2389 if (int($urv[1]/100) == 3) {
2390 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2394 &$cbfunc(1, 0) if ($cbfunc);
2396 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2398 # get the file size and tell the callback
2399 my @st = stat($_[2]);
2401 &$cbfunc(2, $st[7]);
2405 my $pasv = &ftp_command("PASV", 2, $_[3]);
2406 defined($pasv) || return 0;
2407 $pasv =~ /\(([0-9,]+)\)/;
2408 @n = split(/,/ , $1);
2409 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2410 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2415 while(read(PFILE, $buf, 1024) > 0) {
2417 $got += length($buf);
2418 &$cbfunc(3, $got) if ($cbfunc);
2422 if ($got != $st[7]) {
2423 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2424 else { &error("Upload incomplete"); }
2426 &$cbfunc(4) if ($cbfunc);
2429 &ftp_command("", 2, $_[3]) || return 0;
2430 &ftp_command("QUIT", 2, $_[3]) || return 0;
2436 =head2 no_proxy(host)
2438 Checks if some host is on the no proxy list. For internal use by the
2439 http_download and ftp_download functions.
2444 my $ip = &to_ipaddress($_[0]);
2445 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2446 return 1 if ($_[0] =~ /\Q$n\E/ ||
2452 =head2 open_socket(host, port, handle, [&error])
2454 Open a TCP connection to some host and port, using a file handle. The
2457 =item host - Hostname or IP address to connect to.
2459 =item port - TCP port number.
2461 =item handle - A file handle name to use for the connection.
2463 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2468 my ($host, $port, $fh, $err) = @_;
2469 $fh = &callers_package($fh);
2471 if ($gconfig{'debug_what_net'}) {
2472 &webmin_debug_log('TCP', "host=$host port=$port");
2474 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2475 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2476 else { &error("Failed to create socket : $!"); }
2479 if (!($addr = inet_aton($host))) {
2480 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2481 else { &error("Failed to lookup IP address for $host"); }
2483 if ($gconfig{'bind_proxy'}) {
2484 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2485 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2486 else { &error("Failed to bind to source address : $!"); }
2489 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2490 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2491 else { &error("Failed to connect to $host:$port : $!"); }
2493 my $old = select($fh); $| =1; select($old);
2497 =head2 download_timeout
2499 Called when a download times out. For internal use only.
2502 sub download_timeout
2504 $main::download_timed_out = "Download timed out";
2507 =head2 ftp_command(command, expected, [&error], [filehandle])
2509 Send an FTP command, and die if the reply is not what was expected. Mainly
2510 for internal use by the ftp_download and ftp_upload functions.
2515 my ($cmd, $expect, $err, $fh) = @_;
2517 $fh = &callers_package($fh);
2520 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2522 print $fh "$cmd\r\n";
2525 if (!($line = <$fh>)) {
2527 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2528 else { &error("Failed to read reply to $what"); }
2530 $line =~ /^(...)(.)(.*)$/;
2533 foreach my $c (@$expect) {
2534 $found++ if (int($1/100) == $c);
2538 $found++ if (int($1/100) == $_[1]);
2542 if ($err) { $$err = "$what failed : $3"; return undef; }
2543 else { &error("$what failed : $3"); }
2548 # Need to skip extra stuff..
2550 if (!($line = <$fh>)) {
2552 if ($$err) { $$err = "Failed to read reply to $what";
2554 else { &error("Failed to read reply to $what"); }
2556 $line =~ /^(....)(.*)$/; $reply .= $2;
2557 if ($1 eq "$rcode ") { last; }
2561 return wantarray ? ($reply, $rcode) : $reply;
2564 =head2 to_ipaddress(hostname)
2566 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2567 it cannot be resolved.
2572 if (&check_ipaddress($_[0])) {
2576 my $hn = gethostbyname($_[0]);
2577 return undef if (!$hn);
2578 local @ip = unpack("CCCC", $hn);
2579 return join("." , @ip);
2583 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2585 Renders a 4-column table of icons. The useful parameters are :
2587 =item links - An array ref of link destination URLs for the icons.
2589 =item titles - An array ref of titles to appear under the icons.
2591 =item icons - An array ref of URLs for icon images.
2593 =item columns - Number of columns to layout the icons with. Defaults to 4.
2598 &load_theme_library();
2599 if (defined(&theme_icons_table)) {
2600 &theme_icons_table(@_);
2604 my $cols = $_[3] ? $_[3] : 4;
2605 my $per = int(100.0 / $cols);
2606 print "<table class='icons_table' width=100% cellpadding=5>\n";
2607 for(my $i=0; $i<@{$_[0]}; $i++) {
2608 if ($i%$cols == 0) { print "<tr>\n"; }
2609 print "<td width=$per% align=center valign=top>\n";
2610 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2611 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2612 $_[7]->[$i], $_[8]->[$i]);
2614 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2616 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2617 print "</tr>\n" if ($need_tr);
2621 =head2 replace_file_line(file, line, [newline]*)
2623 Replaces one line in some file with 0 or more new lines. The parameters are :
2625 =item file - Full path to some file, like /etc/hosts.
2627 =item line - Line number to replace, starting from 0.
2629 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2632 sub replace_file_line
2635 my $realfile = &translate_filename($_[0]);
2636 open(FILE, $realfile);
2639 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2640 else { splice(@lines, $_[1], 1); }
2641 &open_tempfile(FILE, ">$realfile");
2642 &print_tempfile(FILE, @lines);
2643 &close_tempfile(FILE);
2646 =head2 read_file_lines(file, [readonly])
2648 Returns a reference to an array containing the lines from some file. This
2649 array can be modified, and will be written out when flush_file_lines()
2650 is called. The parameters are :
2652 =item file - Full path to the file to read.
2654 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2658 $lref = read_file_lines("/etc/hosts");
2659 push(@$lref, "127.0.0.1 localhost");
2660 flush_file_lines("/etc/hosts");
2666 my ($package, $filename, $line) = caller;
2667 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2669 my $realfile = &translate_filename($_[0]);
2670 if (!$main::file_cache{$realfile}) {
2673 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2674 open(READFILE, $realfile);
2677 $eol = /\r\n$/ ? "\r\n" : "\n";
2683 $main::file_cache{$realfile} = \@lines;
2684 $main::file_cache_noflush{$realfile} = $_[1];
2685 $main::file_cache_eol{$realfile} = $eol || "\n";
2688 # Make read-write if currently readonly
2690 $main::file_cache_noflush{$realfile} = 0;
2693 return $main::file_cache{$realfile};
2696 =head2 flush_file_lines([file], [eol])
2698 Write out to a file previously read by read_file_lines to disk (except
2699 for those marked readonly). The parameters are :
2701 =item file - The file to flush out.
2703 =item eof - End-of-line character for each line. Defaults to \n.
2706 sub flush_file_lines
2710 local $trans = &translate_filename($_[0]);
2711 $main::file_cache{$trans} ||
2712 &error("flush_file_lines called on non-loaded file $trans");
2713 push(@files, $trans);
2716 @files = ( keys %main::file_cache );
2718 foreach my $f (@files) {
2719 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2720 if (!$main::file_cache_noflush{$f}) {
2721 no warnings; # XXX Bareword file handles should go away
2722 &open_tempfile(FLUSHFILE, ">$f");
2723 foreach my $line (@{$main::file_cache{$f}}) {
2724 (print FLUSHFILE $line,$eol) ||
2725 &error(&text("efilewrite", $f, $!));
2727 &close_tempfile(FLUSHFILE);
2729 delete($main::file_cache{$f});
2730 delete($main::file_cache_noflush{$f});
2734 =head2 unflush_file_lines(file)
2736 Clear the internal cache of some given file, previously read by read_file_lines.
2739 sub unflush_file_lines
2741 my $realfile = &translate_filename($_[0]);
2742 delete($main::file_cache{$realfile});
2743 delete($main::file_cache_noflush{$realfile});
2746 =head2 unix_user_input(fieldname, user, [form])
2748 Returns HTML for an input to select a Unix user. By default this is a text
2749 box with a user popup button next to it.
2754 if (defined(&theme_unix_user_input)) {
2755 return &theme_unix_user_input(@_);
2757 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2758 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2761 =head2 unix_group_input(fieldname, user, [form])
2763 Returns HTML for an input to select a Unix group. By default this is a text
2764 box with a group popup button next to it.
2767 sub unix_group_input
2769 if (defined(&theme_unix_group_input)) {
2770 return &theme_unix_group_input(@_);
2772 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2773 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2776 =head2 hlink(text, page, [module], [width], [height])
2778 Returns HTML for a link that when clicked on pops up a window for a Webmin
2779 help page. The parameters are :
2781 =item text - Text for the link.
2783 =item page - Help page code, such as 'intro'.
2785 =item module - Module the help page is in. Defaults to the current module.
2787 =item width - Width of the help popup window. Defaults to 600 pixels.
2789 =item height - Height of the help popup window. Defaults to 400 pixels.
2791 The actual help pages are in each module's help sub-directory, in files with
2797 if (defined(&theme_hlink)) {
2798 return &theme_hlink(@_);
2800 my $mod = $_[2] ? $_[2] : &get_module_name();
2801 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2802 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2803 return "<a onClick='window.open(\"$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>";
2806 =head2 user_chooser_button(field, multiple, [form])
2808 Returns HTML for a javascript button for choosing a Unix user or users.
2809 The parameters are :
2811 =item field - Name of the HTML field to place the username into.
2813 =item multiple - Set to 1 if multiple users can be selected.
2815 =item form - Index of the form on the page.
2818 sub user_chooser_button
2820 return undef if (!&supports_users());
2821 return &theme_user_chooser_button(@_)
2822 if (defined(&theme_user_chooser_button));
2823 my $form = defined($_[2]) ? $_[2] : 0;
2824 my $w = $_[1] ? 500 : 300;
2826 if ($_[1] && $gconfig{'db_sizeusers'}) {
2827 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2829 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2830 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2832 return "<input type=button onClick='ifield = form.$_[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";
2835 =head2 group_chooser_button(field, multiple, [form])
2837 Returns HTML for a javascript button for choosing a Unix group or groups
2838 The parameters are :
2840 =item field - Name of the HTML field to place the group name into.
2842 =item multiple - Set to 1 if multiple groups can be selected.
2844 =item form - Index of the form on the page.
2847 sub group_chooser_button
2849 return undef if (!&supports_users());
2850 return &theme_group_chooser_button(@_)
2851 if (defined(&theme_group_chooser_button));
2852 my $form = defined($_[2]) ? $_[2] : 0;
2853 my $w = $_[1] ? 500 : 300;
2855 if ($_[1] && $gconfig{'db_sizeusers'}) {
2856 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2858 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2859 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2861 return "<input type=button onClick='ifield = form.$_[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";
2864 =head2 foreign_check(module, [api-only])
2866 Checks if some other module exists and is supported on this OS. The parameters
2869 =item module - Name of the module to check.
2871 =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.
2876 my ($mod, $api) = @_;
2878 my $mdir = &module_root_directory($mod);
2879 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2880 return &check_os_support(\%minfo, undef, undef, $api);
2883 =head2 foreign_exists(module)
2885 Checks if some other module exists. The module parameter is the short module
2891 my $mdir = &module_root_directory($_[0]);
2892 return -r "$mdir/module.info";
2895 =head2 foreign_available(module)
2897 Returns 1 if some module is installed, and acessible to the current user. The
2898 module parameter is the module directory name.
2901 sub foreign_available
2903 return 0 if (!&foreign_check($_[0]) &&
2904 !$gconfig{'available_even_if_no_support'});
2905 my %foreign_module_info = &get_module_info($_[0]);
2907 # Check list of allowed modules
2909 &read_acl(\%acl, undef);
2910 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2911 !$acl{$base_remote_user,'*'});
2913 # Check for usermod restrictions
2914 my @usermods = &list_usermods();
2915 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2917 if (&get_product_name() eq "webmin") {
2918 # Check if the user has any RBAC privileges in this module
2919 if (&supports_rbac($_[0]) &&
2920 &use_rbac_module_acl(undef, $_[0])) {
2921 # RBAC is enabled for this user and module - check if he
2923 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2924 return 0 if (!$rbacs);
2926 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2927 # If denying access to modules not specifically allowed by
2928 # RBAC, then prevent access
2933 # Check readonly support
2934 if (&is_readonly_mode()) {
2935 return 0 if (!$foreign_module_info{'readonly'});
2938 # Check if theme vetos
2939 if (defined(&theme_foreign_available)) {
2940 return 0 if (!&theme_foreign_available($_[0]));
2943 # Check if licence module vetos
2944 if ($main::licence_module) {
2945 return 0 if (!&foreign_call($main::licence_module,
2946 "check_module_licence", $_[0]));
2952 =head2 foreign_require(module, [file], [package])
2954 Brings in functions from another module, and places them in the Perl namespace
2955 with the same name as the module. The parameters are :
2957 =item module - The source module's directory name, like sendmail.
2959 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2961 =item package - Perl package to place the module's functions and global variables in.
2963 If the original module name contains dashes, they will be replaced with _ in
2969 my ($mod, $file, $pkg) = @_;
2970 $pkg ||= $mod || "global";
2971 $pkg =~ s/[^A-Za-z0-9]/_/g;
2974 push(@files, $file);
2978 my %minfo = &get_module_info($mod);
2979 if ($minfo{'library'}) {
2980 @files = split(/\s+/, $minfo{'library'});
2983 @files = ( $mod."-lib.pl" );
2986 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
2987 return 1 if (!@files);
2988 foreach my $f (@files) {
2989 $main::done_foreign_require{$pkg,$f}++;
2992 my $mdir = &module_root_directory($mod);
2993 @INC = &unique($mdir, @INC);
2994 -d $mdir || &error("Module $mod does not exist");
2995 if (!&get_module_name() && $mod) {
2998 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
2999 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3000 my $code = "package $pkg; ".
3001 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3002 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3003 foreach my $f (@files) {
3004 $code .= "do '$mdir/$f' || die \$@; ";
3007 if (defined($old_fmn)) {
3008 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3011 delete($ENV{'FOREIGN_MODULE_NAME'});
3013 if (defined($old_frd)) {
3014 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3017 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3020 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3024 =head2 foreign_call(module, function, [arg]*)
3026 Call a function in another module. The module parameter is the target module
3027 directory name, function is the perl sub to call, and the remaining parameters
3028 are the arguments. However, unless you need to call a function whose name
3029 is dynamic, it is better to use Perl's cross-module function call syntax
3030 like module::function(args).
3035 my $pkg = $_[0] || "global";
3036 $pkg =~ s/[^A-Za-z0-9]/_/g;
3037 my @args = @_[2 .. @_-1];
3038 $main::foreign_args = \@args;
3039 my @rv = eval <<EOF;
3041 &$_[1](\@{\$main::foreign_args});
3043 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3044 return wantarray ? @rv : $rv[0];
3047 =head2 foreign_config(module, [user-config])
3049 Get the configuration from another module, and return it as a hash. If the
3050 user-config parameter is set to 1, returns the Usermin user-level preferences
3051 for the current user instead.
3056 my ($mod, $uc) = @_;
3059 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3060 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3061 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3064 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3069 =head2 foreign_installed(module, mode)
3071 Checks if the server for some module is installed, and possibly also checks
3072 if the module has been configured by Webmin.
3073 For mode 1, returns 2 if the server is installed and configured for use by
3074 Webmin, 1 if installed but not configured, or 0 otherwise.
3075 For mode 0, returns 1 if installed, 0 if not.
3076 If the module does not provide an install_check.pl script, assumes that
3077 the server is installed.
3080 sub foreign_installed
3082 my ($mod, $configured) = @_;
3083 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3085 return $main::foreign_installed_cache{$mod,$configured};
3089 if (!&foreign_check($mod)) {
3094 my $mdir = &module_root_directory($mod);
3095 if (!-r "$mdir/install_check.pl") {
3096 # Not known, assume OK
3097 $rv = $configured ? 2 : 1;
3100 # Call function to check
3101 &foreign_require($mod, "install_check.pl");
3102 $rv = &foreign_call($mod, "is_installed", $configured);
3105 $main::foreign_installed_cache{$mod,$configured} = $rv;
3110 =head2 foreign_defined(module, function)
3112 Returns 1 if some function is defined in another module. In general, it is
3113 simpler to use the syntax &defined(module::function) instead.
3119 $pkg =~ s/[^A-Za-z0-9]/_/g;
3120 my $func = "${pkg}::$_[1]";
3121 return defined(&$func);
3124 =head2 get_system_hostname([short])
3126 Returns the hostname of this system. If the short parameter is set to 1,
3127 then the domain name is not prepended - otherwise, Webmin will attempt to get
3128 the fully qualified hostname, like foo.example.com.
3131 sub get_system_hostname
3134 if (!$main::get_system_hostname[$m]) {
3135 if ($gconfig{'os_type'} ne 'windows') {
3136 # Try some common Linux hostname files first
3138 if ($gconfig{'os_type'} eq 'redhat-linux') {
3140 &read_env_file("/etc/sysconfig/network", \%nc);
3141 if ($nc{'HOSTNAME'}) {
3142 $fromfile = $nc{'HOSTNAME'};
3145 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3146 my $hn = &read_file_contents("/etc/hostname");
3152 elsif ($gconfig{'os_type'} eq 'open-linux') {
3153 my $hn = &read_file_contents("/etc/HOSTNAME");
3159 elsif ($gconfig{'os_type'} eq 'solaris') {
3160 my $hn = &read_file_contents("/etc/nodename");
3167 # If we found a hostname, use it if value
3168 if ($fromfile && ($m || $fromfile =~ /\./)) {
3170 $fromfile =~ s/\..*$//;
3172 $main::get_system_hostname[$m] = $fromfile;
3176 # Can use hostname command on Unix
3177 &execute_command("hostname", undef,
3178 \$main::get_system_hostname[$m], undef, 0, 1);
3179 chop($main::get_system_hostname[$m]);
3181 eval "use Sys::Hostname";
3183 $main::get_system_hostname[$m] = eval "hostname()";
3185 if ($@ || !$main::get_system_hostname[$m]) {
3186 $main::get_system_hostname[$m] = "UNKNOWN";
3189 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3190 $gconfig{'os_type'} =~ /linux$/ &&
3191 !$gconfig{'no_hostname_f'} && !$_[0]) {
3192 # Try with -f flag to get fully qualified name
3194 my $ex = &execute_command("hostname -f", undef, \$flag,
3197 if ($ex || $flag eq "") {
3198 # -f not supported! We have probably set the
3199 # hostname to just '-f'. Fix the problem
3202 &execute_command("hostname ".
3203 quotemeta($main::get_system_hostname[$m]),
3204 undef, undef, undef, 0, 1);
3208 $main::get_system_hostname[$m] = $flag;
3213 # On Windows, try computername environment variable
3214 return $ENV{'computername'} if ($ENV{'computername'});
3215 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3217 # Fall back to net name command
3218 my $out = `net name 2>&1`;
3219 if ($out =~ /\-+\r?\n(\S+)/) {
3220 $main::get_system_hostname[$m] = $1;
3223 $main::get_system_hostname[$m] = "windows";
3227 return $main::get_system_hostname[$m];
3230 =head2 get_webmin_version
3232 Returns the version of Webmin currently being run, such as 1.450.
3235 sub get_webmin_version
3237 if (!$get_webmin_version) {
3238 open(VERSION, "$root_directory/version") || return 0;
3239 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3242 return $get_webmin_version;
3245 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3247 Returns a hash containing access control options for the given user and module.
3248 By default the current username and module name are used. If the no-rbac flag
3249 is given, the permissions will not be updated based on the user's RBAC role
3250 (as seen on Solaris). If the no-default flag is given, default permissions for
3251 the module will not be included.
3256 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3257 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3258 my $mdir = &module_root_directory($m);
3261 # Read default ACL first, to be overridden by per-user settings
3262 &read_file_cached("$mdir/defaultacl", \%rv);
3264 # If this isn't a master admin user, apply the negative permissions
3265 # so that he doesn't un-expectedly gain access to new features
3267 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3268 if ($gaccess{'negative'}) {
3269 &read_file_cached("$mdir/negativeacl", \%rv);
3273 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3274 # RBAC overrides exist for this user in this module
3275 my $rbac = &get_rbac_module_acl(
3276 defined($_[0]) ? $_[0] : $remote_user, $m);
3277 foreach my $r (keys %$rbac) {
3278 $rv{$r} = $rbac->{$r};
3281 elsif ($gconfig{"risk_$u"} && $m) {
3282 # ACL is defined by user's risk level
3283 my $rf = $gconfig{"risk_$u"}.'.risk';
3284 &read_file_cached("$mdir/$rf", \%rv);
3286 my $sf = $gconfig{"skill_$u"}.'.skill';
3287 &read_file_cached("$mdir/$sf", \%rv);
3290 # Use normal Webmin ACL, if a user is set
3291 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3292 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3293 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3296 if ($tconfig{'preload_functions'}) {
3297 &load_theme_library();
3299 if (defined(&theme_get_module_acl)) {
3300 %rv = &theme_get_module_acl($u, $m, \%rv);
3305 =head2 get_group_module_acl(group, [module])
3307 Returns the ACL for a Webmin group, in an optional module (which defaults to
3308 the current module).
3311 sub get_group_module_acl
3314 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3315 my $mdir = &module_root_directory($m);
3317 &read_file_cached("$mdir/defaultacl", \%rv);
3318 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3319 if (defined(&theme_get_module_acl)) {
3320 %rv = &theme_get_module_acl($g, $m, \%rv);
3325 =head2 save_module_acl(&acl, [user], [module])
3327 Updates the acl hash for some user and module. The parameters are :
3329 =item acl - Hash reference for the new access control options.
3331 =item user - User to update, defaulting to the current user.
3333 =item module - Module to update, defaulting to the caller.
3338 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3339 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3340 if (&foreign_check("acl")) {
3341 # Check if this user is a member of a group, and if he gets the
3342 # module from a group. If so, update its ACL as well
3343 &foreign_require("acl", "acl-lib.pl");
3345 foreach my $g (&acl::list_groups()) {
3346 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3347 &indexof($m, @{$g->{'modules'}}) >= 0) {
3353 &save_group_module_acl($_[0], $group->{'name'}, $m);
3356 if (!-d "$config_directory/$m") {
3357 mkdir("$config_directory/$m", 0755);
3359 &write_file("$config_directory/$m/$u.acl", $_[0]);
3362 =head2 save_group_module_acl(&acl, group, [module])
3364 Updates the acl hash for some group and module. The parameters are :
3366 =item acl - Hash reference for the new access control options.
3368 =item group - Group name to update.
3370 =item module - Module to update, defaulting to the caller.
3373 sub save_group_module_acl
3376 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3377 if (&foreign_check("acl")) {
3378 # Check if this group is a member of a group, and if it gets the
3379 # module from a group. If so, update the parent ACL as well
3380 &foreign_require("acl", "acl-lib.pl");
3382 foreach my $pg (&acl::list_groups()) {
3383 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3384 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3390 &save_group_module_acl($_[0], $group->{'name'}, $m);
3393 if (!-d "$config_directory/$m") {
3394 mkdir("$config_directory/$m", 0755);
3396 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3401 This function must be called by all Webmin CGI scripts, either directly or
3402 indirectly via a per-module lib.pl file. It performs a number of initialization
3403 and housekeeping tasks, such as working out the module name, checking that the
3404 current user has access to the module, and populating global variables. Some
3405 of the variables set include :
3407 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3409 =item $var_directory - Base logs directory, typically /var/webmin
3411 =item %config - Per-module configuration.
3413 =item %gconfig - Global configuration.
3415 =item $scriptname - Base name of the current perl script.
3417 =item $module_name - The name of the current module.
3419 =item $module_config_directory - The config directory for this module.
3421 =item $module_config_file - The config file for this module.
3423 =item $module_root_directory - This module's code directory.
3425 =item $webmin_logfile - The detailed logfile for webmin.
3427 =item $remote_user - The actual username used to login to webmin.
3429 =item $base_remote_user - The username whose permissions are in effect.
3431 =item $current_theme - The theme currently in use.
3433 =item $root_directory - The first root directory of this webmin install.
3435 =item @root_directories - All root directories for this webmin install.
3440 # Record first process ID that called this, so we know when it exited to clean
3442 $main::initial_process_id ||= $$;
3444 # Configuration and spool directories
3445 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3446 die "WEBMIN_CONFIG not set";
3448 $config_directory = $ENV{'WEBMIN_CONFIG'};
3449 if (!defined($ENV{'WEBMIN_VAR'})) {
3450 open(VARPATH, "$config_directory/var-path");
3451 chop($var_directory = <VARPATH>);
3455 $var_directory = $ENV{'WEBMIN_VAR'};
3457 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3458 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3460 if ($ENV{'SESSION_ID'}) {
3461 # Hide this variable from called programs, but keep it for internal use
3462 $main::session_id = $ENV{'SESSION_ID'};
3463 delete($ENV{'SESSION_ID'});
3465 if ($ENV{'REMOTE_PASS'}) {
3466 # Hide the password too
3467 $main::remote_pass = $ENV{'REMOTE_PASS'};
3468 delete($ENV{'REMOTE_PASS'});
3471 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3472 # Looks like we are running setuid, but the real UID hasn't been set.
3473 # Do so now, so that executed programs don't get confused
3478 # Read the webmin global config file. This contains the OS type and version,
3479 # OS specific configuration and global options such as proxy servers
3480 $config_file = "$config_directory/config";
3482 &read_file_cached($config_file, \%gconfig);
3483 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3484 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3486 # If debugging is enabled, open the debug log
3487 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3488 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3489 if ($gconfig{'debug_size'}) {
3490 my @st = stat($dlog);
3491 if ($st[7] > $gconfig{'debug_size'}) {
3492 rename($dlog, $dlog.".0");
3495 open(main::DEBUGLOG, ">>$dlog");
3496 $main::opened_debug_log = 1;
3498 if ($gconfig{'debug_what_start'}) {
3499 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3500 $main::debug_log_start_time = time();
3501 &webmin_debug_log("START", "script=$script_name");
3502 $main::debug_log_start_module = $module_name;
3506 # Set PATH and LD_LIBRARY_PATH
3507 if ($gconfig{'path'}) {
3508 if ($gconfig{'syspath'}) {
3510 $ENV{'PATH'} = $gconfig{'path'};
3514 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3517 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3519 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3520 if ($gconfig{'http_proxy'}) {
3521 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3523 if ($gconfig{'ftp_proxy'}) {
3524 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3526 if ($gconfig{'noproxy'}) {
3527 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3530 # Find all root directories
3532 if (&get_miniserv_config(\%miniserv)) {
3533 @root_directories = ( $miniserv{'root'} );
3534 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3535 push(@root_directories, $miniserv{"extraroot_$i"});
3539 # Work out which module we are in, and read the per-module config file
3540 $0 =~ s/\\/\//g; # Force consistent path on Windows
3541 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3542 # In a foreign call - use the module name given
3543 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3544 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3545 @root_directories = ( $root_directory ) if (!@root_directories);
3547 elsif ($ENV{'SCRIPT_NAME'}) {
3548 my $sn = $ENV{'SCRIPT_NAME'};
3549 $sn =~ s/^$gconfig{'webprefix'}//
3550 if (!$gconfig{'webprefixnoredir'});
3551 if ($sn =~ /^\/([^\/]+)\//) {
3552 # Get module name from CGI path
3555 if ($ENV{'SERVER_ROOT'}) {
3556 $root_directory = $ENV{'SERVER_ROOT'};
3558 elsif ($ENV{'SCRIPT_FILENAME'}) {
3559 $root_directory = $ENV{'SCRIPT_FILENAME'};
3560 $root_directory =~ s/$sn$//;
3562 @root_directories = ( $root_directory ) if (!@root_directories);
3565 # Get root directory from miniserv.conf, and deduce module name from $0
3566 $root_directory = $root_directories[0];
3568 foreach my $r (@root_directories) {
3569 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3570 # Under a module directory
3575 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3581 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3584 # Work out of this is a web, command line or cron job
3585 if (!$main::webmin_script_type) {
3586 if ($ENV{'SCRIPT_NAME'}) {
3588 $main::webmin_script_type = 'web';
3591 # Cron jobs have no TTY
3592 if ($gconfig{'os_type'} eq 'windows' ||
3593 open(DEVTTY, ">/dev/tty")) {
3594 $main::webmin_script_type = 'cmd';
3598 $main::webmin_script_type = 'cron';
3603 # Set the umask based on config
3604 if ($gconfig{'umask'} && !$main::umask_already++) {
3605 umask(oct($gconfig{'umask'}));
3608 # If this is a cron job or other background task, set the nice level
3609 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3611 if ($gconfig{'nice'}) {
3612 eval 'POSIX::nice($gconfig{\'nice\'});';
3615 # Set IO scheduling class and priority
3616 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3618 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3619 if ($gconfig{'sclass'} ne '');
3620 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3621 if ($gconfig{'sprio'} ne '');
3623 &execute_command("$cmd >/dev/null 2>&1");
3626 $main::nice_already++;
3629 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3630 $base_remote_user = $u;
3631 $remote_user = $ENV{'REMOTE_USER'};
3634 # Find and load the configuration file for this module
3635 my (@ruinfo, $rgroup);
3636 $module_config_directory = "$config_directory/$module_name";
3637 if (&get_product_name() eq "usermin" &&
3638 -r "$module_config_directory/config.$remote_user") {
3640 $module_config_file = "$module_config_directory/config.$remote_user";
3642 elsif (&get_product_name() eq "usermin" &&
3643 (@ruinfo = getpwnam($remote_user)) &&
3644 ($rgroup = getgrgid($ruinfo[3])) &&
3645 -r "$module_config_directory/config.\@$rgroup") {
3646 # Based on group name
3647 $module_config_file = "$module_config_directory/config.\@$rgroup";
3651 $module_config_file = "$module_config_directory/config";
3654 &read_file_cached($module_config_file, \%config);
3656 # Fix up windows-specific substitutions in values
3657 foreach my $k (keys %config) {
3658 if ($config{$k} =~ /\$\{systemroot\}/) {
3659 my $root = &get_windows_root();
3660 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3665 # Record the initial module
3666 $main::initial_module_name ||= $module_name;
3668 # Set some useful variables
3670 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3671 $gconfig{'mobile_theme'} :
3672 defined($gconfig{'theme_'.$remote_user}) ?
3673 $gconfig{'theme_'.$remote_user} :
3674 defined($gconfig{'theme_'.$base_remote_user}) ?
3675 $gconfig{'theme_'.$base_remote_user} :
3677 @current_themes = split(/\s+/, $current_themes);
3678 $current_theme = $current_themes[0];
3679 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3680 $theme_root_directory = $theme_root_directories[0];
3681 @theme_configs = ( );
3682 foreach my $troot (@theme_root_directories) {
3684 &read_file_cached("$troot/config", \%onetconfig);
3685 &read_file_cached("$troot/config", \%tconfig);
3686 push(@theme_configs, \%onetconfig);
3688 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3689 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3691 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3692 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3694 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3695 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3696 if ($tconfig{'preload_functions'}) {
3697 # Force load of theme functions right now, if requested
3698 &load_theme_library();
3700 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3701 # Load the theme's Webmin:: package classes
3702 do "$theme_root_directory/$tconfig{'oofunctions'}";
3707 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3708 : "$var_directory/webmin.log";
3710 # Load language strings into %text
3711 my @langs = &list_languages();
3713 if ($gconfig{'acceptlang'}) {
3714 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3715 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3717 $accepted_lang = $al->{'lang'};
3722 $current_lang = $force_lang ? $force_lang :
3723 $accepted_lang ? $accepted_lang :
3724 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3725 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3726 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3727 foreach my $l (@langs) {
3728 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3730 @lang_order_list = &unique($default_lang,
3731 split(/:/, $current_lang_info->{'fallback'}),
3733 %text = &load_language($module_name);
3734 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3736 # Get the %module_info for this module
3738 my ($mi) = grep { $_->{'dir'} eq $module_name }
3739 &get_all_module_infos(2);
3740 %module_info = %$mi;
3741 $module_root_directory = &module_root_directory($module_name);
3744 if ($module_name && !$main::no_acl_check &&
3745 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3746 # Check if the HTTP user can access this module
3747 if (!&foreign_available($module_name)) {
3748 if (!&foreign_check($module_name)) {
3749 &error(&text('emodulecheck',
3750 "<i>$module_info{'desc'}</i>"));
3753 &error(&text('emodule', "<i>$u</i>",
3754 "<i>$module_info{'desc'}</i>"));
3757 $main::no_acl_check++;
3760 # Check the Referer: header for nasty redirects
3761 my @referers = split(/\s+/, $gconfig{'referers'});
3763 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3766 my $http_host = $ENV{'HTTP_HOST'};
3767 $http_host =~ s/:\d+$//;
3768 my $unsafe_index = $unsafe_index_cgi ||
3769 &get_module_variable('$unsafe_index_cgi');
3771 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
3772 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3774 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3775 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3776 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3777 ($referer_site && $referer_site ne $http_host &&
3778 &indexof($referer_site, @referers) < 0 ||
3779 !$referer_site && $gconfig{'referers_none'}) &&
3780 !$trust_unknown_referers &&
3781 !&get_module_variable('$trust_unknown_referers')) {
3782 # Looks like a link from elsewhere .. show an error
3783 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3785 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3786 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3787 if ($referer_site) {
3789 print &text('referer_warn',
3790 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3792 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3793 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3796 # No referer info given
3797 print &text('referer_warn_unknown', $url),"<p>\n";
3798 print &text('referer_fix1u'),"<p>\n";
3799 print &text('referer_fix2u'),"<p>\n";
3803 &footer("/", $text{'index'});
3806 $main::no_referers_check++;
3807 $main::completed_referers_check++;
3809 # Call theme post-init
3810 if (defined(&theme_post_init_config)) {
3811 &theme_post_init_config(@_);
3814 # Record that we have done the calling library in this package
3815 my ($callpkg, $lib) = caller();
3817 $main::done_foreign_require{$callpkg,$lib} = 1;
3819 # If a licence checking is enabled, do it now
3820 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3821 &foreign_check($gconfig{'licence_module'}) &&
3822 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3823 my $oldpwd = &get_current_dir();
3824 $main::done_licence_module_check++;
3825 $main::licence_module = $gconfig{'licence_module'};
3826 &foreign_require($main::licence_module, "licence_check.pl");
3827 ($main::licence_status, $main::licence_message) =
3828 &foreign_call($main::licence_module, "check_licence");
3832 # Export global variables to caller
3833 if ($main::export_to_caller) {
3834 foreach my $v ('$config_file', '%gconfig', '$null_file',
3835 '$path_separator', '@root_directories',
3836 '$root_directory', '$module_name',
3837 '$base_remote_user', '$remote_user',
3838 '$module_config_directory', '$module_config_file',
3839 '%config', '@current_themes', '$current_theme',
3840 '@theme_root_directories', '$theme_root_directory',
3841 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3842 '$webmin_logfile', '$current_lang',
3843 '$current_lang_info', '@lang_order_list', '%text',
3844 '%module_info', '$module_root_directory') {
3845 my ($vt, $vn) = split('', $v, 2);
3846 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3853 =head2 load_language([module], [directory])
3855 Returns a hashtable mapping text codes to strings in the appropriate language,
3856 based on the $current_lang global variable, which is in turn set based on
3857 the Webmin user's selection. The optional module parameter tells the function
3858 which module to load strings for, and defaults to the calling module. The
3859 optional directory parameter can be used to load strings from a directory
3862 In regular module development you will never need to call this function
3863 directly, as init_config calls it for you, and places the module's strings
3864 into the %text hash.
3870 my $root = $root_directory;
3871 my $ol = $gconfig{'overlang'};
3872 my ($dir) = ($_[1] || "lang");
3874 # Read global lang files
3875 foreach my $o (@lang_order_list) {
3876 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3877 return () if (!$ok && $o eq $default_lang);
3880 foreach my $o (@lang_order_list) {
3881 &read_file_cached("$root/$ol/$o", \%text);
3884 &read_file_cached("$config_directory/custom-lang", \%text);
3887 # Read module's lang files
3888 my $mdir = &module_root_directory($_[0]);
3889 foreach my $o (@lang_order_list) {
3890 &read_file_cached("$mdir/$dir/$o", \%text);
3893 foreach $o (@lang_order_list) {
3894 &read_file_cached("$mdir/$ol/$o", \%text);
3897 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3899 foreach $k (keys %text) {
3900 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3903 if (defined(&theme_load_language)) {
3904 &theme_load_language(\%text, $_[0]);
3909 =head2 text_subs(string)
3911 Used internally by load_language to expand $code substitutions in language
3917 if (substr($_[0], 0, 8) eq "include:") {
3920 open(INCLUDE, substr($_[0], 8));
3928 my $t = $_[1]->{$_[0]};
3929 return defined($t) ? $t : '$'.$_[0];
3933 =head2 text(message, [substitute]+)
3935 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3936 the substitute parameters. This makes it easy to use strings with placeholders
3937 that get replaced with programmatically generated text. For example :
3939 print &text('index_hello', $remote_user),"<p>\n";
3944 my $t = &get_module_variable('%text', 1);
3945 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3946 for(my $i=1; $i<@_; $i++) {
3947 $rv =~ s/\$$i/$_[$i]/g;
3952 =head2 encode_base64(string)
3954 Encodes a string into base64 format, for use in MIME email or HTTP
3955 authorization headers.
3961 pos($_[0]) = 0; # ensure start at the beginning
3962 while ($_[0] =~ /(.{1,57})/gs) {
3963 $res .= substr(pack('u57', $1), 1)."\n";
3966 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3967 my $padding = (3 - length($_[0]) % 3) % 3;
3968 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3972 =head2 decode_base64(string)
3974 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3981 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3982 if (length($str) % 4) {
3985 $str =~ s/=+$//; # remove padding
3986 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3987 while ($str =~ /(.{1,60})/gs) {
3988 my $len = chr(32 + length($1)*3/4); # compute length byte
3989 $res .= unpack("u", $len . $1 ); # uudecode
3994 =head2 get_module_info(module, [noclone], [forcache])
3996 Returns a hash containg details of the given module. Some useful keys are :
3998 =item dir - The module directory, like sendmail.
4000 =item desc - Human-readable description, in the current users' language.
4002 =item version - Optional module version number.
4004 =item os_support - List of supported operating systems and versions.
4006 =item category - Category on Webmin's left menu, like net.
4011 return () if ($_[0] =~ /^\./);
4012 my (%rv, $clone, $o);
4013 my $mdir = &module_root_directory($_[0]);
4014 &read_file_cached("$mdir/module.info", \%rv) || return ();
4016 foreach $o (@lang_order_list) {
4017 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4018 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4020 if ($clone && !$_[1] && $config_directory) {
4021 $rv{'clone'} = $rv{'desc'};
4022 &read_file("$config_directory/$_[0]/clone", \%rv);
4025 my %module_categories;
4026 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4027 my $pn = &get_product_name();
4028 if (defined($rv{'category_'.$pn})) {
4029 # Can override category for webmin/usermin
4030 $rv{'category'} = $rv{'category_'.$pn};
4032 $rv{'realcategory'} = $rv{'category'};
4033 $rv{'category'} = $module_categories{$_[0]}
4034 if (defined($module_categories{$_[0]}));
4036 # Apply description overrides
4037 $rv{'realdesc'} = $rv{'desc'};
4039 &read_file_cached("$config_directory/webmin.descs", \%descs);
4040 if ($descs{$_[0]." ".$current_lang}) {
4041 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4043 elsif ($descs{$_[0]}) {
4044 $rv{'desc'} = $descs{$_[0]};
4048 # Apply per-user description overridde
4049 my %gaccess = &get_module_acl(undef, "");
4050 if ($gaccess{'desc_'.$_[0]}) {
4051 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4055 if ($rv{'longdesc'}) {
4056 # All standard modules have an index.cgi
4057 $rv{'index_link'} = 'index.cgi';
4060 # Call theme-specific override function
4061 if (defined(&theme_get_module_info)) {
4062 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4068 =head2 get_all_module_infos(cachemode)
4070 Returns a list contains the information on all modules in this webmin
4071 install, including clones. Uses caching to reduce the number of module.info
4072 files that need to be read. Each element of the array is a hash reference
4073 in the same format as returned by get_module_info. The cache mode flag can be :
4074 0 = read and write, 1 = don't read or write, 2 = read only
4077 sub get_all_module_infos
4081 # Is the cache out of date? (ie. have any of the root's changed?)
4082 my $cache_file = "$config_directory/module.infos.cache";
4084 if (&read_file_cached($cache_file, \%cache)) {
4085 foreach my $r (@root_directories) {
4087 if ($st[9] != $cache{'mtime_'.$r}) {
4097 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4098 # Can use existing module.info cache
4100 foreach my $k (keys %cache) {
4101 if ($k =~ /^(\S+) (\S+)$/) {
4102 $mods{$1}->{$2} = $cache{$k};
4105 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4108 # Need to rebuild cache
4110 foreach my $r (@root_directories) {
4112 foreach my $m (readdir(DIR)) {
4113 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4114 my %minfo = &get_module_info($m, 0, 1);
4115 next if (!%minfo || !$minfo{'dir'});
4117 foreach $k (keys %minfo) {
4118 $cache{"${m} ${k}"} = $minfo{$k};
4123 $cache{'mtime_'.$r} = $st[9];
4125 $cache{'lang'} = $current_lang;
4126 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4129 # Override descriptions for modules for current user
4130 my %gaccess = &get_module_acl(undef, "");
4131 foreach my $m (@rv) {
4132 if ($gaccess{"desc_".$m->{'dir'}}) {
4133 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4137 # Apply installed flags
4139 &read_file_cached("$config_directory/installed.cache", \%installed);
4140 foreach my $m (@rv) {
4141 $m->{'installed'} = $installed{$m->{'dir'}};
4147 =head2 get_theme_info(theme)
4149 Returns a hash containing a theme's details, taken from it's theme.info file.
4150 Some useful keys are :
4152 =item dir - The theme directory, like blue-theme.
4154 =item desc - Human-readable description, in the current users' language.
4156 =item version - Optional module version number.
4158 =item os_support - List of supported operating systems and versions.
4163 return () if ($_[0] =~ /^\./);
4165 my $tdir = &module_root_directory($_[0]);
4166 &read_file("$tdir/theme.info", \%rv) || return ();
4167 foreach my $o (@lang_order_list) {
4168 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4174 =head2 list_languages
4176 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4177 Each is a hash reference with the following keys :
4179 =item lang - The short language code, like es for Spanish.
4181 =item desc - A human-readable description, in English.
4183 =item charset - An optional character set to use when displaying the language.
4185 =item titles - Set to 1 only if Webmin has title images for the language.
4187 =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.
4192 if (!@main::list_languages_cache) {
4195 open(LANG, "$root_directory/lang_list.txt");
4197 if (/^(\S+)\s+(.*)/) {
4198 my $l = { 'desc' => $2 };
4199 foreach $o (split(/,/, $1)) {
4200 if ($o =~ /^([^=]+)=(.*)$/) {
4204 $l->{'index'} = scalar(@rv);
4205 push(@main::list_languages_cache, $l);
4209 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4210 @main::list_languages_cache;
4212 return @main::list_languages_cache;
4215 =head2 read_env_file(file, &hash)
4217 Similar to Webmin's read_file function, but handles files containing shell
4218 environment variables formatted like :
4223 The file parameter is the full path to the file to read, and hash a Perl hash
4224 ref to read names and values into.
4230 &open_readfile(FILE, $_[0]) || return 0;
4233 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4234 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4235 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4243 =head2 write_env_file(file, &hash, [export])
4245 Writes out a hash to a file in name='value' format, suitable for use in a shell
4246 script. The parameters are :
4248 =item file - Full path for a file to write to
4250 =item hash - Hash reference of names and values to write.
4252 =item export - If set to 1, preceed each variable setting with the word 'export'.
4257 my $exp = $_[2] ? "export " : "";
4258 &open_tempfile(FILE, ">$_[0]");
4259 foreach my $k (keys %{$_[1]}) {
4260 my $v = $_[1]->{$k};
4261 if ($v =~ /^\S+$/) {
4262 &print_tempfile(FILE, "$exp$k=$v\n");
4265 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4268 &close_tempfile(FILE);
4271 =head2 lock_file(filename, [readonly], [forcefile])
4273 Lock a file for exclusive access. If the file is already locked, spin
4274 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4275 to work OK. The parameters are :
4277 =item filename - File or directory to lock.
4279 =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.
4281 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4286 my $realfile = &translate_filename($_[0]);
4287 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4288 my $no_lock = !&can_lock_file($realfile);
4289 my $lock_tries_count = 0;
4292 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4297 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4300 # Create the .lock file
4301 open(LOCKING, ">$realfile.lock") || return 0;
4302 my $lck = eval "flock(LOCKING, 2+4)";
4304 # Lock of lock file failed! Wait till later
4307 print LOCKING $$,"\n";
4308 eval "flock(LOCKING, 8)";
4311 $main::locked_file_list{$realfile} = int($_[1]);
4312 push(@main::temporary_files, "$realfile.lock");
4313 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4314 !&get_module_variable('$no_log_file_changes') &&
4316 # Grab a copy of this file for later diffing
4318 $main::locked_file_data{$realfile} = undef;
4320 $main::locked_file_type{$realfile} = 1;
4321 $main::locked_file_data{$realfile} = '';
4323 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4324 $main::locked_file_type{$realfile} = 2;
4325 $main::locked_file_data{$realfile} = $lnk;
4327 elsif (open(ORIGFILE, $realfile)) {
4328 $main::locked_file_type{$realfile} = 0;
4329 $main::locked_file_data{$realfile} = '';
4332 $main::locked_file_data{$realfile} .=$_;
4341 if ($lock_tries_count++ > 5*60) {
4342 # Give up after 5 minutes
4343 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4349 =head2 unlock_file(filename)
4351 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4352 file changes is enabled, then at unlock file a diff will be taken between the
4353 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4354 called. This can then be viewed in the Webmin Actions Log module.
4359 my $realfile = &translate_filename($_[0]);
4360 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4361 unlink("$realfile.lock") if (&can_lock_file($realfile));
4362 delete($main::locked_file_list{$realfile});
4363 if (exists($main::locked_file_data{$realfile})) {
4364 # Diff the new file with the old
4366 my $lnk = readlink($realfile);
4367 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4368 my $oldtype = $main::locked_file_type{$realfile};
4369 my $new = !defined($main::locked_file_data{$realfile});
4370 if ($new && !-e _) {
4371 # file doesn't exist, and never did! do nothing ..
4373 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4374 # is (or was) a directory ..
4375 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4376 push(@main::locked_file_diff,
4377 { 'type' => 'mkdir', 'object' => $realfile });
4379 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4380 push(@main::locked_file_diff,
4381 { 'type' => 'rmdir', 'object' => $realfile });
4384 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4385 # is (or was) a symlink ..
4386 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4387 push(@main::locked_file_diff,
4388 { 'type' => 'symlink', 'object' => $realfile,
4391 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4392 push(@main::locked_file_diff,
4393 { 'type' => 'unsymlink', 'object' => $realfile,
4394 'data' => $main::locked_file_data{$realfile} });
4396 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4397 push(@main::locked_file_diff,
4398 { 'type' => 'resymlink', 'object' => $realfile,
4403 # is a file, or has changed type?!
4404 my ($diff, $delete_file);
4405 my $type = "modify";
4407 open(NEWFILE, ">$realfile");
4412 if (!defined($main::locked_file_data{$realfile})) {
4415 open(ORIGFILE, ">$realfile.webminorig");
4416 print ORIGFILE $main::locked_file_data{$realfile};
4418 $diff = &backquote_command(
4419 "diff ".quotemeta("$realfile.webminorig")." ".
4420 quotemeta($realfile)." 2>/dev/null");
4421 push(@main::locked_file_diff,
4422 { 'type' => $type, 'object' => $realfile,
4423 'data' => $diff } ) if ($diff);
4424 unlink("$realfile.webminorig");
4425 unlink($realfile) if ($delete_file);
4428 if ($gconfig{'logfullfiles'}) {
4429 # Add file details to list of those to fully log
4430 $main::orig_file_data{$realfile} ||=
4431 $main::locked_file_data{$realfile};
4432 $main::orig_file_type{$realfile} ||=
4433 $main::locked_file_type{$realfile};
4436 delete($main::locked_file_data{$realfile});
4437 delete($main::locked_file_type{$realfile});
4441 =head2 test_lock(file)
4443 Returns 1 if some file is currently locked, 0 if not.
4448 my $realfile = &translate_filename($_[0]);
4449 return 0 if (!$_[0]);
4450 return 1 if (defined($main::locked_file_list{$realfile}));
4451 return 0 if (!&can_lock_file($realfile));
4453 if (open(LOCKING, "$realfile.lock")) {
4458 return $pid && kill(0, $pid);
4461 =head2 unlock_all_files
4463 Unlocks all files locked by the current script.
4466 sub unlock_all_files
4468 foreach $f (keys %main::locked_file_list) {
4473 =head2 can_lock_file(file)
4475 Returns 1 if some file should be locked, based on the settings in the
4476 Webmin Configuration module. For internal use by lock_file only.
4481 if (&is_readonly_mode()) {
4482 return 0; # never lock in read-only mode
4484 elsif ($gconfig{'lockmode'} == 0) {
4487 elsif ($gconfig{'lockmode'} == 1) {
4491 # Check if under any of the directories
4493 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4494 if (&same_file($d, $_[0]) ||
4495 &is_under_directory($d, $_[0])) {
4499 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4503 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4505 Log some action taken by a user. This is typically called at the end of a
4506 script, once all file changes are complete and all commands run. The
4509 =item action - A short code for the action being performed, like 'create'.
4511 =item type - A code for the type of object the action is performed to, like 'user'.
4513 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4515 =item params - A hash ref of additional information about the action.
4517 =item module - Name of the module in which the action was performed, which defaults to the current module.
4519 =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.
4521 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4523 =item client-ip - IP address of the browser that performed the action.
4528 return if (!$gconfig{'log'} || &is_readonly_mode());
4529 my $m = $_[4] ? $_[4] : &get_module_name();
4531 if ($gconfig{'logclear'}) {
4532 # check if it is time to clear the log
4533 my @st = stat("$webmin_logfile.time");
4534 my $write_logtime = 0;
4536 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4537 # clear logfile and all diff files
4538 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4539 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4540 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4541 unlink($webmin_logfile);
4548 if ($write_logtime) {
4549 open(LOGTIME, ">$webmin_logfile.time");
4550 print LOGTIME time(),"\n";
4555 # If an action script directory is defined, call the appropriate scripts
4556 if ($gconfig{'action_script_dir'}) {
4557 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4558 my ($basedir) = $gconfig{'action_script_dir'};
4560 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4563 opendir(DIR, $dir) or die "Can't open $dir: $!";
4564 while (defined($file = readdir(DIR))) {
4565 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4566 if (-x "$dir/$file") {
4567 # Call a script notifying it of the action
4569 $ENV{'ACTION_MODULE'} = &get_module_name();
4570 $ENV{'ACTION_ACTION'} = $_[0];
4571 $ENV{'ACTION_TYPE'} = $_[1];
4572 $ENV{'ACTION_OBJECT'} = $_[2];
4573 $ENV{'ACTION_SCRIPT'} = $script_name;
4574 foreach my $p (keys %param) {
4575 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4577 system("$dir/$file", @_,
4578 "<$null_file", ">$null_file", "2>&1");
4586 # should logging be done at all?
4587 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4588 split(/\s+/, $gconfig{'logusers'})) < 0);
4589 return if ($gconfig{'logmodules'} && &indexof($m,
4590 split(/\s+/, $gconfig{'logmodules'})) < 0);
4594 my @tm = localtime($now);
4595 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4596 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4597 $main::action_id_count++;
4598 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4599 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4600 $tm[2], $tm[1], $tm[0],
4601 $remote_user || '-',
4602 $main::session_id || '-',
4603 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4604 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4605 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4607 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4608 my $v = $_[3]->{$k};
4614 elsif (ref($v) eq 'ARRAY') {
4618 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4619 $line .= " $k='$vv'";
4623 foreach $vv (split(/\0/, $v)) {
4625 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4626 $line .= " $k='$vv'";
4629 $param{$k} = join(" ", @pv);
4631 open(WEBMINLOG, ">>$webmin_logfile");
4632 print WEBMINLOG $line,"\n";
4634 if ($gconfig{'logperms'}) {
4635 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4638 chmod(0600, $webmin_logfile);
4641 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4642 # Find and record the changes made to any locked files, or commands run
4644 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4645 foreach my $d (@main::locked_file_diff) {
4646 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4647 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4648 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4649 print DIFFLOG $d->{'data'};
4651 if ($d->{'input'}) {
4652 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4653 print DIFFLOG $d->{'input'};
4656 if ($gconfig{'logperms'}) {
4657 chmod(oct($gconfig{'logperms'}),
4658 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4659 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4663 @main::locked_file_diff = undef;
4665 if ($gconfig{'logfullfiles'}) {
4666 # Save the original contents of any modified files
4668 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4669 foreach my $f (keys %main::orig_file_data) {
4670 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4671 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4672 if (!defined($main::orig_file_type{$f})) {
4673 print ORIGLOG -1," ",$f,"\n";
4676 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4678 print ORIGLOG $main::orig_file_data{$f};
4680 if ($gconfig{'logperms'}) {
4681 chmod(oct($gconfig{'logperms'}),
4682 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4686 %main::orig_file_data = undef;
4687 %main::orig_file_type = undef;
4691 if ($gconfig{'logsyslog'}) {
4692 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4693 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4694 setlogsock("inet");';
4696 # Syslog module is installed .. try to convert to a
4697 # human-readable form
4699 my $mod = &get_module_name();
4700 my $mdir = module_root_directory($mod);
4701 if (-r "$mdir/log_parser.pl") {
4702 &foreign_require($mod, "log_parser.pl");
4704 foreach my $k (keys %{$_[3]}) {
4705 my $v = $_[3]->{$k};
4706 if (ref($v) eq 'ARRAY') {
4707 $params{$k} = join("\0", @$v);
4713 $msg = &foreign_call($mod, "parse_webmin_log",
4714 $remote_user, $script_name,
4715 $_[0], $_[1], $_[2], \%params);
4716 $msg =~ s/<[^>]*>//g; # Remove tags
4718 elsif ($_[0] eq "_config_") {
4719 my %wtext = &load_language("webminlog");
4720 $msg = $wtext{'search_config'};
4722 $msg ||= "$_[0] $_[1] $_[2]";
4723 my %info = &get_module_info($m);
4724 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4729 =head2 additional_log(type, object, data, [input])
4731 Records additional log data for an upcoming call to webmin_log, such
4732 as a command that was run or SQL that was executed. Typically you will never
4733 need to call this function directory.
4738 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4739 push(@main::locked_file_diff,
4740 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4741 'input' => $_[3] } );
4745 =head2 webmin_debug_log(type, message)
4747 Write something to the Webmin debug log. For internal use only.
4750 sub webmin_debug_log
4752 my ($type, $msg) = @_;
4753 return 0 if (!$main::opened_debug_log);
4754 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4755 if ($gconfig{'debug_modules'}) {
4756 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
4757 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
4760 my @tm = localtime($now);
4762 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4763 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4764 $tm[2], $tm[1], $tm[0],
4765 $remote_user || "-",
4766 $ENV{'REMOTE_HOST'} || "-",
4767 &get_module_name() || "-",
4770 seek(main::DEBUGLOG, 0, 2);
4771 print main::DEBUGLOG $line."\n";
4775 =head2 system_logged(command)
4777 Just calls the Perl system() function, but also logs the command run.
4782 if (&is_readonly_mode()) {
4783 print STDERR "Vetoing command $_[0]\n";
4786 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4787 my $cmd = join(" ", @realcmd);
4789 if ($cmd =~ s/(\s*&\s*)$//) {
4792 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4793 $cmd =~ s/^\((.*)\)\s*$/$1/;
4795 &additional_log('exec', undef, $cmd);
4796 return system(@realcmd);
4799 =head2 backquote_logged(command)
4801 Executes a command and returns the output (like `command`), but also logs it.
4804 sub backquote_logged
4806 if (&is_readonly_mode()) {
4808 print STDERR "Vetoing command $_[0]\n";
4811 my $realcmd = &translate_command($_[0]);
4814 if ($cmd =~ s/(\s*&\s*)$//) {
4817 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4818 $cmd =~ s/^\((.*)\)\s*$/$1/;
4820 &additional_log('exec', undef, $cmd);
4821 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4825 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4827 Runs some command, waiting at most the given number of seconds for it to
4828 complete, and returns the output. The maxlines parameter sets the number
4829 of lines of output to capture. The safe parameter should be set to 1 if the
4830 command is safe for read-only mode users to run.
4833 sub backquote_with_timeout
4835 my $realcmd = &translate_command($_[0]);
4836 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4837 if ($gconfig{'debug_what_cmd'});
4839 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4844 my $elapsed = time() - $start;
4845 last if ($elapsed > $_[1]);
4847 vec($rmask, fileno(OUT), 1) = 1;
4848 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4849 last if (!$sel || $sel < 0);
4851 last if (!defined($line));
4854 if ($_[3] && $linecount >= $_[3]) {
4859 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4863 return wantarray ? ($out, $timed_out) : $out;
4866 =head2 backquote_command(command, safe?)
4868 Executes a command and returns the output (like `command`), subject to
4869 command translation. The safe parameter should be set to 1 if the command
4870 is safe for read-only mode users to run.
4873 sub backquote_command
4875 if (&is_readonly_mode() && !$_[1]) {
4876 print STDERR "Vetoing command $_[0]\n";
4880 my $realcmd = &translate_command($_[0]);
4881 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4885 =head2 kill_logged(signal, pid, ...)
4887 Like Perl's built-in kill function, but also logs the fact that some process
4888 was killed. On Windows, falls back to calling process.exe to terminate a
4894 return scalar(@_)-1 if (&is_readonly_mode());
4895 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4896 if ($gconfig{'debug_what_procs'});
4897 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4898 if ($gconfig{'os_type'} eq 'windows') {
4899 # Emulate some kills with process.exe
4900 my $arg = $_[0] eq "KILL" ? "-k" :
4901 $_[0] eq "TERM" ? "-q" :
4902 $_[0] eq "STOP" ? "-s" :
4903 $_[0] eq "CONT" ? "-r" : undef;
4905 foreach my $p (@_[1..@_-1]) {
4907 $ok ||= kill($_[0], $p);
4910 &execute_command("process $arg $p");
4922 =head2 rename_logged(old, new)
4924 Re-names a file and logs the rename. If the old and new files are on different
4925 filesystems, calls mv or the Windows rename function to do the job.
4930 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4931 return &rename_file($_[0], $_[1]);
4934 =head2 rename_file(old, new)
4936 Renames a file or directory. If the old and new files are on different
4937 filesystems, calls mv or the Windows rename function to do the job.
4942 if (&is_readonly_mode()) {
4943 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4946 my $src = &translate_filename($_[0]);
4947 my $dst = &translate_filename($_[1]);
4948 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4949 if ($gconfig{'debug_what_ops'});
4950 my $ok = rename($src, $dst);
4951 if (!$ok && $! !~ /permission/i) {
4952 # Try the mv command, in case this is a cross-filesystem rename
4953 if ($gconfig{'os_type'} eq 'windows') {
4954 # Need to use rename
4955 my $out = &backquote_command("rename ".quotemeta($_[0]).
4956 " ".quotemeta($_[1])." 2>&1");
4958 $! = $out if (!$ok);
4962 my $out = &backquote_command("mv ".quotemeta($_[0]).
4963 " ".quotemeta($_[1])." 2>&1");
4965 $! = $out if (!$ok);
4971 =head2 symlink_logged(src, dest)
4973 Create a symlink, and logs it. Effectively does the same thing as the Perl
4980 my $rv = &symlink_file($_[0], $_[1]);
4981 &unlock_file($_[1]);
4985 =head2 symlink_file(src, dest)
4987 Creates a soft link, unless in read-only mode. Effectively does the same thing
4988 as the Perl symlink function.
4993 if (&is_readonly_mode()) {
4994 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4997 my $src = &translate_filename($_[0]);
4998 my $dst = &translate_filename($_[1]);
4999 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5000 if ($gconfig{'debug_what_ops'});
5001 return symlink($src, $dst);
5004 =head2 link_file(src, dest)
5006 Creates a hard link, unless in read-only mode. The existing new link file
5007 will be deleted if necessary. Effectively the same as Perl's link function.
5012 if (&is_readonly_mode()) {
5013 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5016 my $src = &translate_filename($_[0]);
5017 my $dst = &translate_filename($_[1]);
5018 &webmin_debug_log('LINK', "src=$src dst=$dst")
5019 if ($gconfig{'debug_what_ops'});
5020 unlink($dst); # make sure link works
5021 return link($src, $dst);
5024 =head2 make_dir(dir, perms, recursive)
5026 Creates a directory and sets permissions on it, unless in read-only mode.
5027 The perms parameter sets the octal permissions to apply, which unlike Perl's
5028 mkdir will really get set. The recursive flag can be set to 1 to have the
5029 function create parent directories too.
5034 my ($dir, $perms, $recur) = @_;
5035 if (&is_readonly_mode()) {
5036 print STDERR "Vetoing directory $dir\n";
5039 $dir = &translate_filename($dir);
5040 my $exists = -d $dir ? 1 : 0;
5041 return 1 if ($exists && $recur); # already exists
5042 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5043 my $rv = mkdir($dir, $perms);
5044 if (!$rv && $recur) {
5045 # Failed .. try mkdir -p
5046 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5047 my $ex = &execute_command("mkdir $param "."e_path($dir));
5053 chmod($perms, $dir);
5058 =head2 set_ownership_permissions(user, group, perms, file, ...)
5060 Sets the user, group owner and permissions on some files. The parameters are :
5062 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5064 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5066 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5068 =item file - One or more files or directories to modify.
5071 sub set_ownership_permissions
5073 my ($user, $group, $perms, @files) = @_;
5074 if (&is_readonly_mode()) {
5075 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5078 @files = map { &translate_filename($_) } @files;
5079 if ($gconfig{'debug_what_ops'}) {
5080 foreach my $f (@files) {
5081 &webmin_debug_log('PERMS',
5082 "file=$f user=$user group=$group perms=$perms");
5086 if (defined($user)) {
5087 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5089 if (defined($group)) {
5090 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5093 my @uinfo = getpwuid($uid);
5096 $rv = chown($uid, $gid, @files);
5098 if ($rv && defined($perms)) {
5099 $rv = chmod($perms, @files);
5104 =head2 unlink_logged(file, ...)
5106 Like Perl's unlink function, but locks the files beforehand and un-locks them
5107 after so that the deletion is logged by Webmin.
5113 foreach my $f (@_) {
5114 if (!&test_lock($f)) {
5119 my @rv = &unlink_file(@_);
5120 foreach my $f (@_) {
5125 return wantarray ? @rv : $rv[0];
5128 =head2 unlink_file(file, ...)
5130 Deletes some files or directories. Like Perl's unlink function, but also
5131 recursively deletes directories with the rm command if needed.
5136 return 1 if (&is_readonly_mode());
5139 foreach my $f (@_) {
5140 &unflush_file_lines($f);
5141 my $realf = &translate_filename($f);
5142 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5144 if (!rmdir($realf)) {
5146 if ($gconfig{'os_type'} eq 'windows') {
5147 # Call del and rmdir commands
5150 my $out = `del /q "$qm" 2>&1`;
5152 $out = `rmdir "$qm" 2>&1`;
5157 my $qm = quotemeta($realf);
5158 $out = `rm -rf $qm 2>&1`;
5167 if (!unlink($realf)) {
5173 return wantarray ? ($rv, $err) : $rv;
5176 =head2 copy_source_dest(source, dest)
5178 Copy some file or directory to a new location. Returns 1 on success, or 0
5179 on failure - also sets $! on failure. If the source is a directory, uses
5180 piped tar commands to copy a whole directory structure including permissions
5184 sub copy_source_dest
5186 return (1, undef) if (&is_readonly_mode());
5187 my ($src, $dst) = @_;
5190 &webmin_debug_log('COPY', "src=$src dst=$dst")
5191 if ($gconfig{'debug_what_ops'});
5192 if ($gconfig{'os_type'} eq 'windows') {
5193 # No tar or cp on windows, so need to use copy command
5197 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5200 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5208 # A directory .. need to copy with tar command
5209 my @st = stat($src);
5212 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5213 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5220 # Can just copy with cp
5221 my $out = &backquote_logged("cp -p ".quotemeta($src).
5222 " ".quotemeta($dst)." 2>&1");
5228 return wantarray ? ($ok, $err) : $ok;
5231 =head2 remote_session_name(host|&server)
5233 Generates a session ID for some server. For this server, this will always
5234 be an empty string. For a server object it will include the hostname and
5235 port and PID. For a server name, it will include the hostname and PID. For
5239 sub remote_session_name
5241 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5242 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5243 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5244 ref($_[0]) ? "" : "$_[0].$$";
5247 =head2 remote_foreign_require(server, module, file)
5249 Connects to rpc.cgi on a remote webmin server and have it open a session
5250 to a process that will actually do the require and run functions. This is the
5251 equivalent for foreign_require, but for a remote Webmin system. The server
5252 parameter can either be a hostname of a system registered in the Webmin
5253 Servers Index module, or a hash reference for a system from that module.
5256 sub remote_foreign_require
5258 my $call = { 'action' => 'require',
5261 my $sn = &remote_session_name($_[0]);
5262 if ($remote_session{$sn}) {
5263 $call->{'session'} = $remote_session{$sn};
5266 $call->{'newsession'} = 1;
5268 my $rv = &remote_rpc_call($_[0], $call);
5269 if ($rv->{'session'}) {
5270 $remote_session{$sn} = $rv->{'session'};
5271 $remote_session_server{$sn} = $_[0];
5275 =head2 remote_foreign_call(server, module, function, [arg]*)
5277 Call a function on a remote server. Must have been setup first with
5278 remote_foreign_require for the same server and module. Equivalent to
5279 foreign_call, but with the extra server parameter to specify the remote
5283 sub remote_foreign_call
5285 return undef if (&is_readonly_mode());
5286 my $sn = &remote_session_name($_[0]);
5287 return &remote_rpc_call($_[0], { 'action' => 'call',
5290 'session' => $remote_session{$sn},
5291 'args' => [ @_[3 .. $#_] ] } );
5294 =head2 remote_foreign_check(server, module, [api-only])
5296 Checks if some module is installed and supported on a remote server. Equivilant
5297 to foreign_check, but for the remote Webmin system specified by the server
5301 sub remote_foreign_check
5303 return &remote_rpc_call($_[0], { 'action' => 'check',
5308 =head2 remote_foreign_config(server, module)
5310 Gets the configuration for some module from a remote server, as a hash.
5311 Equivalent to foreign_config, but for a remote system.
5314 sub remote_foreign_config
5316 return &remote_rpc_call($_[0], { 'action' => 'config',
5317 'module' => $_[1] });
5320 =head2 remote_eval(server, module, code)
5322 Evaluates some perl code in the context of a module on a remote webmin server.
5323 The server parameter must be the hostname of a remote system, module must
5324 be a module directory name, and code a string of Perl code to run. This can
5325 only be called after remote_foreign_require for the same server and module.
5330 return undef if (&is_readonly_mode());
5331 my $sn = &remote_session_name($_[0]);
5332 return &remote_rpc_call($_[0], { 'action' => 'eval',
5335 'session' => $remote_session{$sn} });
5338 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5340 Transfers some local file to another server via Webmin's RPC protocol, and
5341 returns the resulting remote filename. If the remotefile parameter is given,
5342 that is the destination filename which will be used. Otherwise a randomly
5343 selected temporary filename will be used, and returned by the function.
5348 return undef if (&is_readonly_mode());
5350 my $sn = &remote_session_name($_[0]);
5351 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5352 # Copy data over TCP connection
5353 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5355 'name' => $_[3] } );
5357 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5358 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5359 return &$main::remote_error_handler("Failed to transfer file : $error")
5362 while(read(FILE, $got, 1024) > 0) {
5366 shutdown(TWRITE, 1);
5368 if ($error && $error !~ /^OK/) {
5369 # Got back an error!
5370 return &$main::remote_error_handler("Failed to transfer file : $error");
5376 # Just pass file contents as parameters
5378 while(read(FILE, $got, 1024) > 0) {
5382 return &remote_rpc_call($_[0], { 'action' => 'write',
5385 'session' => $remote_session{$sn} });
5389 =head2 remote_read(server, localfile, remotefile)
5391 Transfers a file from a remote server to this system, using Webmin's RPC
5392 protocol. The server parameter must be the hostname of a system registered
5393 in the Webmin Servers Index module, localfile is the destination path on this
5394 system, and remotefile is the file to fetch from the remote server.
5399 my $sn = &remote_session_name($_[0]);
5400 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5401 # Copy data over TCP connection
5402 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5403 'file' => $_[2] } );
5405 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5408 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5409 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5410 return &$main::remote_error_handler("Failed to transfer file : $error")
5413 open(FILE, ">$_[1]");
5414 while(read(TREAD, $got, 1024) > 0) {
5421 # Just get data as return value
5422 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5424 'session' => $remote_session{$sn} });
5425 open(FILE, ">$_[1]");
5431 =head2 remote_finished
5433 Close all remote sessions. This happens automatically after a while
5434 anyway, but this function should be called to clean things up faster.
5439 foreach my $sn (keys %remote_session) {
5440 my $server = $remote_session_server{$sn};
5441 &remote_rpc_call($server, { 'action' => 'quit',
5442 'session' => $remote_session{$sn} } );
5443 delete($remote_session{$sn});
5444 delete($remote_session_server{$sn});
5446 foreach $fh (keys %fast_fh_cache) {
5448 delete($fast_fh_cache{$fh});
5452 =head2 remote_error_setup(&function)
5454 Sets a function to be called instead of &error when a remote RPC operation
5455 fails. Useful if you want to have more control over your remote operations.
5458 sub remote_error_setup
5460 $main::remote_error_handler = $_[0] || \&error;
5463 =head2 remote_rpc_call(server, structure)
5465 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5466 and then reads back a reply structure. This is mainly for internal use only,
5467 and is called by the other remote_* functions.
5473 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5475 # Server structure was given
5477 $serv->{'user'} || $serv->{'id'} == 0 ||
5478 return &$main::remote_error_handler(
5479 "No Webmin login set for server");
5482 # lookup the server in the webmin servers module if needed
5483 if (!%main::remote_servers_cache) {
5484 &foreign_require("servers", "servers-lib.pl");
5485 foreach $s (&foreign_call("servers", "list_servers")) {
5486 $main::remote_servers_cache{$s->{'host'}} = $s;
5487 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5490 $serv = $main::remote_servers_cache{$_[0]};
5491 $serv || return &$main::remote_error_handler(
5492 "No Webmin Servers entry for $_[0]");
5493 $serv->{'user'} || return &$main::remote_error_handler(
5494 "No login set for server $_[0]");
5496 my $ip = $serv->{'ip'} || $serv->{'host'};
5498 # Work out the username and password
5500 if ($serv->{'sameuser'}) {
5501 $user = $remote_user;
5502 defined($main::remote_pass) || return &$main::remote_error_handler(
5503 "Password for this server is not available");
5504 $pass = $main::remote_pass;
5507 $user = $serv->{'user'};
5508 $pass = $serv->{'pass'};
5511 if ($serv->{'fast'} || !$sn) {
5512 # Make TCP connection call to fastrpc.cgi
5513 if (!$fast_fh_cache{$sn} && $sn) {
5514 # Need to open the connection
5515 my $con = &make_http_connection(
5516 $ip, $serv->{'port'}, $serv->{'ssl'},
5517 "POST", "/fastrpc.cgi");
5518 return &$main::remote_error_handler(
5519 "Failed to connect to $serv->{'host'} : $con")
5521 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5522 &write_http_connection($con, "User-agent: Webmin\r\n");
5523 my $auth = &encode_base64("$user:$pass");
5525 &write_http_connection($con, "Authorization: basic $auth\r\n");
5526 &write_http_connection($con, "Content-length: ",
5527 length($tostr),"\r\n");
5528 &write_http_connection($con, "\r\n");
5529 &write_http_connection($con, $tostr);
5531 # read back the response
5532 my $line = &read_http_connection($con);
5533 $line =~ tr/\r\n//d;
5534 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5535 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5537 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5538 return &$main::remote_error_handler("HTTP error : $line");
5540 $line = &read_http_connection($con);
5541 $line =~ tr/\r\n//d;
5543 $line = &read_http_connection($con);
5544 if ($line =~ /^0\s+(.*)/) {
5545 return &$main::remote_error_handler("RPC error : $1");
5547 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5548 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5549 # Started ok .. connect and save SID
5550 &close_http_connection($con);
5551 my ($port, $sid, $version, $error) = ($1, $2, $3);
5552 &open_socket($ip, $port, $sid, \$error);
5553 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5555 $fast_fh_cache{$sn} = $sid;
5556 $remote_server_version{$sn} = $version;
5559 while($stuff = &read_http_connection($con)) {
5562 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5565 elsif (!$fast_fh_cache{$sn}) {
5566 # Open the connection by running fastrpc.cgi locally
5567 pipe(RPCOUTr, RPCOUTw);
5571 open(STDOUT, ">&RPCOUTw");
5575 $ENV{'REQUEST_METHOD'} = 'GET';
5576 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5577 $ENV{'SERVER_ROOT'} ||= $root_directory;
5579 if ($base_remote_user ne 'root' &&
5580 $base_remote_user ne 'admin') {
5581 # Need to fake up a login for the CGI!
5582 &read_acl(undef, \%acl);
5583 $ENV{'BASE_REMOTE_USER'} =
5584 $ENV{'REMOTE_USER'} =
5585 $acl{'root'} ? 'root' : 'admin';
5587 delete($ENV{'FOREIGN_MODULE_NAME'});
5588 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5589 chdir($root_directory);
5590 if (!exec("$root_directory/fastrpc.cgi")) {
5591 print "exec failed : $!\n";
5598 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5602 if ($line =~ /^0\s+(.*)/) {
5603 return &$main::remote_error_handler("RPC error : $2");
5605 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5606 # Started ok .. connect and save SID
5608 my ($port, $sid, $error) = ($1, $2, undef);
5609 &open_socket("localhost", $port, $sid, \$error);
5610 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5611 $fast_fh_cache{$sn} = $sid;
5618 &error("Bad response from fastrpc.cgi : $line");
5621 # Got a connection .. send off the request
5622 my $fh = $fast_fh_cache{$sn};
5623 my $tostr = &serialise_variable($_[1]);
5624 print $fh length($tostr)," $fh\n";
5626 my $rlen = int(<$fh>);
5627 my ($fromstr, $got);
5628 while(length($fromstr) < $rlen) {
5629 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5630 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5633 my $from = &unserialise_variable($fromstr);
5635 return &$main::remote_error_handler("Remote Webmin error");
5637 if (defined($from->{'arv'})) {
5638 return @{$from->{'arv'}};
5641 return $from->{'rv'};
5645 # Call rpc.cgi on remote server
5646 my $tostr = &serialise_variable($_[1]);
5648 my $con = &make_http_connection($ip, $serv->{'port'},
5649 $serv->{'ssl'}, "POST", "/rpc.cgi");
5650 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5652 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5653 &write_http_connection($con, "User-agent: Webmin\r\n");
5654 my $auth = &encode_base64("$user:$pass");
5656 &write_http_connection($con, "Authorization: basic $auth\r\n");
5657 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5658 &write_http_connection($con, "\r\n");
5659 &write_http_connection($con, $tostr);
5661 # read back the response
5662 my $line = &read_http_connection($con);
5663 $line =~ tr/\r\n//d;
5664 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5665 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5667 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5669 $line = &read_http_connection($con);
5670 $line =~ tr/\r\n//d;
5673 while($line = &read_http_connection($con)) {
5677 my $from = &unserialise_variable($fromstr);
5678 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5679 if (defined($from->{'arv'})) {
5680 return @{$from->{'arv'}};
5683 return $from->{'rv'};
5688 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5690 Executes some function in parallel on multiple servers at once. Fills in
5691 the returns and errors arrays respectively. If the module and library
5692 parameters are given, that module is remotely required on the server first,
5693 to check if it is connectable. The parameters are :
5695 =item servers - A list of Webmin system hash references.
5697 =item parallel - Number of parallel operations to perform.
5699 =item function - Reference to function to call for each system.
5701 =item args - Additional parameters to the function.
5703 =item returns - Array ref to place return values into, in same order as servers.
5705 =item errors - Array ref to place error messages into.
5707 =item module - Optional module to require on the remote system first.
5709 =item library - Optional library to require in the module.
5712 sub remote_multi_callback
5714 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5715 &remote_error_setup(\&remote_multi_callback_error);
5717 # Call the functions
5719 foreach my $g (@$servs) {
5725 $remote_multi_callback_err = undef;
5727 # Require the remote lib
5728 &remote_foreign_require($g->{'host'}, $mod, $lib);
5729 if ($remote_multi_callback_err) {
5730 # Failed .. return error
5731 print $wh &serialise_variable(
5732 [ undef, $remote_multi_callback_err ]);
5738 my $a = ref($args) ? $args->[$p] : $args;
5739 my $rv = &$func($g, $a);
5742 print $wh &serialise_variable(
5743 [ $rv, $remote_multi_callback_err ]);
5751 # Read back the results
5753 foreach my $g (@$servs) {
5757 $errs->[$p] = "Failed to read response from $g->{'host'}";
5760 my $rv = &unserialise_variable($line);
5762 $rets->[$p] = $rv->[0];
5763 $errs->[$p] = $rv->[1];
5768 &remote_error_setup(undef);
5771 sub remote_multi_callback_error
5773 $remote_multi_callback_err = $_[0];
5776 =head2 serialise_variable(variable)
5778 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5779 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5780 called on each member to serialize the entire object.
5783 sub serialise_variable
5785 if (!defined($_[0])) {
5791 $rv = &urlize($_[0]);
5793 elsif ($r eq 'SCALAR') {
5794 $rv = &urlize(${$_[0]});
5796 elsif ($r eq 'ARRAY') {
5797 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5799 elsif ($r eq 'HASH') {
5800 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5801 &urlize(&serialise_variable($_[0]->{$_})) }
5804 elsif ($r eq 'REF') {
5805 $rv = &serialise_variable(${$_[0]});
5807 elsif ($r eq 'CODE') {
5812 # An object - treat as a hash
5813 $r = "OBJECT ".&urlize($r);
5814 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5815 &urlize(&serialise_variable($_[0]->{$_})) }
5818 return ($r ? $r : 'VAL').",".$rv;
5821 =head2 unserialise_variable(string)
5823 Converts a string created by serialise_variable() back into the original
5824 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5825 object, the same class is used on this system, if available.
5828 sub unserialise_variable
5830 my @v = split(/,/, $_[0]);
5832 if ($v[0] eq 'VAL') {
5833 @v = split(/,/, $_[0], -1);
5834 $rv = &un_urlize($v[1]);
5836 elsif ($v[0] eq 'SCALAR') {
5837 local $r = &un_urlize($v[1]);
5840 elsif ($v[0] eq 'ARRAY') {
5842 for(my $i=1; $i<@v; $i++) {
5843 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5846 elsif ($v[0] eq 'HASH') {
5848 for(my $i=1; $i<@v; $i+=2) {
5849 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5850 &unserialise_variable(&un_urlize($v[$i+1]));
5853 elsif ($v[0] eq 'REF') {
5854 local $r = &unserialise_variable($v[1]);
5857 elsif ($v[0] eq 'UNDEF') {
5860 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5861 # An object hash that we have to re-bless
5864 for(my $i=1; $i<@v; $i+=2) {
5865 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5866 &unserialise_variable(&un_urlize($v[$i+1]));
5874 =head2 other_groups(user)
5876 Returns a list of secondary groups a user is a member of, as a list of
5885 while(my @g = getgrent()) {
5886 my @m = split(/\s+/, $g[3]);
5887 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5889 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5893 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5895 Returns HTML for a button that pops up a data chooser window. The parameters
5898 =item dayfield - Name of the text field to place the day of the month into.
5900 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5902 =item yearfield - Name of the text field to place the year into.
5905 sub date_chooser_button
5907 return &theme_date_chooser_button(@_)
5908 if (defined(&theme_date_chooser_button));
5909 my ($w, $h) = (250, 225);
5910 if ($gconfig{'db_sizedate'}) {
5911 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5913 return "<input type=button onClick='window.dfield = form.$_[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";
5916 =head2 help_file(module, file)
5918 Returns the path to a module's help file of some name, typically under the
5919 help directory with a .html extension.
5924 my $mdir = &module_root_directory($_[0]);
5925 my $dir = "$mdir/help";
5926 foreach my $o (@lang_order_list) {
5927 my $lang = "$dir/$_[1].$o.html";
5928 return $lang if (-r $lang);
5930 return "$dir/$_[1].html";
5935 Seeds the random number generator, if not already done in this script. On Linux
5936 this makes use of the current time, process ID and a read from /dev/urandom.
5937 On other systems, only the current time and process ID are used.
5942 if (!$main::done_seed_random) {
5943 if (open(RANDOM, "/dev/urandom")) {
5945 read(RANDOM, $buf, 4);
5947 srand(time() ^ $$ ^ $buf);
5952 $main::done_seed_random = 1;
5956 =head2 disk_usage_kb(directory)
5958 Returns the number of kB used by some directory and all subdirs. Implemented
5959 by calling the C<du -k> command.
5964 my $dir = &translate_filename($_[0]);
5966 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5968 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5970 return $out =~ /^([0-9]+)/ ? $1 : "???";
5973 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
5975 Returns the number of bytes taken up by all files in some directory and all
5976 sub-directories, by summing up their lengths. The disk_usage_kb is more
5977 reflective of reality, as the filesystem typically pads file sizes to 1k or
5981 sub recursive_disk_usage
5983 my $dir = &translate_filename($_[0]);
5990 my @st = stat($dir);
5996 my @files = readdir(DIR);
5998 foreach my $f (@files) {
5999 next if ($f eq "." || $f eq "..");
6000 next if ($skip && $f =~ /$skip/);
6001 next if ($only && $f !~ /$only/);
6002 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6008 =head2 help_search_link(term, [ section, ... ] )
6010 Returns HTML for a link to the man module for searching local and online
6011 docs for various search terms. The term parameter can either be a single
6012 word like 'bind', or a space-separated list of words. This function is typically
6013 used by modules that want to refer users to additional documentation in man
6014 pages or local system doc files.
6017 sub help_search_link
6019 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6020 my $for = &urlize(shift(@_));
6021 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6022 join("&", map { "section=$_" } @_)."&".
6023 "for=$for&exact=1&check=".&get_module_name()."'>".
6024 $text{'helpsearch'}."</a>\n";
6031 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6033 Opens a connection to some HTTP server, maybe through a proxy, and returns
6034 a handle object. The handle can then be used to send additional headers
6035 and read back a response. If anything goes wrong, returns an error string.
6036 The parameters are :
6038 =item host - Hostname or IP address of the webserver to connect to.
6040 =item port - HTTP port number to connect to.
6042 =item ssl - Set to 1 to connect in SSL mode.
6044 =item method - HTTP method, like GET or POST.
6046 =item page - Page to request on the webserver, like /foo/index.html
6048 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6051 sub make_http_connection
6053 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6056 foreach my $h (@$headers) {
6057 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6061 if (&is_readonly_mode()) {
6062 return "HTTP connections not allowed in readonly mode";
6064 my $rv = { 'fh' => time().$$ };
6067 eval "use Net::SSLeay";
6068 $@ && return $text{'link_essl'};
6069 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6070 eval "Net::SSLeay::load_error_strings()";
6071 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6072 return "Failed to create SSL context";
6073 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6074 return "Failed to create SSL connection";
6076 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6077 !&no_proxy($host)) {
6080 &open_socket($1, $2, $rv->{'fh'}, \$error);
6083 my $fh = $rv->{'fh'};
6084 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6085 if ($gconfig{'proxy_user'}) {
6086 my $auth = &encode_base64(
6087 "$gconfig{'proxy_user'}:".
6088 "$gconfig{'proxy_pass'}");
6089 $auth =~ tr/\r\n//d;
6090 print $fh "Proxy-Authorization: Basic $auth\r\n";
6094 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6095 return "Proxy error : $3" if ($2 != 200);
6098 return "Proxy error : $line";
6103 elsif (!$gconfig{'proxy_fallback'}) {
6104 # Connection to proxy failed - give up
6111 &open_socket($host, $port, $rv->{'fh'}, \$error);
6112 return $error if ($error);
6114 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6115 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6116 return "SSL connect() failed";
6117 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6118 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6121 # Plain HTTP request
6123 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6124 !&no_proxy($host)) {
6127 &open_socket($1, $2, $rv->{'fh'}, \$error);
6131 my $fh = $rv->{'fh'};
6132 my $rtxt = $method." ".
6133 "http://$host:$port$page HTTP/1.0\r\n";
6134 if ($gconfig{'proxy_user'}) {
6135 my $auth = &encode_base64(
6136 "$gconfig{'proxy_user'}:".
6137 "$gconfig{'proxy_pass'}");
6138 $auth =~ tr/\r\n//d;
6139 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6144 elsif (!$gconfig{'proxy_fallback'}) {
6149 # Connecting directly
6151 &open_socket($host, $port, $rv->{'fh'}, \$error);
6152 return $error if ($error);
6153 my $fh = $rv->{'fh'};
6154 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6161 =head2 read_http_connection(&handle, [bytes])
6163 Reads either one line or up to the specified number of bytes from the handle,
6164 originally supplied by make_http_connection.
6167 sub read_http_connection
6171 if ($h->{'ssl_con'}) {
6174 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6175 # need to read more..
6176 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6178 $rv = $h->{'buffer'};
6179 delete($h->{'buffer'});
6182 $h->{'buffer'} .= $more;
6184 $rv = substr($h->{'buffer'}, 0, $idx+1);
6185 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6188 if (length($h->{'buffer'})) {
6189 $rv = $h->{'buffer'};
6190 delete($h->{'buffer'});
6193 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6199 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6202 my $fh = $h->{'fh'};
6206 $rv = undef if ($rv eq "");
6210 =head2 write_http_connection(&handle, [data+])
6212 Writes the given data to the given HTTP connection handle.
6215 sub write_http_connection
6218 my $fh = $h->{'fh'};
6220 if ($h->{'ssl_ctx'}) {
6221 foreach my $s (@_) {
6222 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6223 $allok = 0 if (!$ok);
6227 my $ok = (print $fh @_);
6228 $allok = 0 if (!$ok);
6233 =head2 close_http_connection(&handle)
6235 Closes a connection to an HTTP server, identified by the given handle.
6238 sub close_http_connection
6244 =head2 clean_environment
6246 Deletes any environment variables inherited from miniserv so that they
6247 won't be passed to programs started by webmin. This is useful when calling
6248 programs that check for CGI-related environment variables and modify their
6249 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6252 sub clean_environment
6254 %UNCLEAN_ENV = %ENV;
6255 foreach my $k (keys %ENV) {
6256 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6260 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6261 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6262 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6263 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6264 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6265 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6266 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6267 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6273 =head2 reset_environment
6275 Puts the environment back how it was before clean_environment was callled.
6278 sub reset_environment
6281 foreach my $k (keys %UNCLEAN_ENV) {
6282 $ENV{$k} = $UNCLEAN_ENV{$k};
6284 undef(%UNCLEAN_ENV);
6288 =head2 progress_callback
6290 Never called directly, but useful for passing to &http_download to print
6291 out progress of an HTTP request.
6294 sub progress_callback
6296 if (defined(&theme_progress_callback)) {
6297 # Call the theme override
6298 return &theme_progress_callback(@_);
6302 print $progress_callback_prefix;
6304 $progress_size = $_[1];
6305 $progress_step = int($_[1] / 10);
6306 print &text('progress_size2', $progress_callback_url,
6307 &nice_size($progress_size)),"<br>\n";
6310 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6312 $last_progress_time = $last_progress_size = undef;
6314 elsif ($_[0] == 3) {
6316 my $sp = $progress_callback_prefix.(" " x 5);
6317 if ($progress_size) {
6318 # And we have a size to compare against
6319 my $st = int(($_[1] * 10) / $progress_size);
6320 my $time_now = time();
6321 if ($st != $progress_step ||
6322 $time_now - $last_progress_time > 60) {
6323 # Show progress every 10% or 60 seconds
6324 print $sp,&text('progress_datan', &nice_size($_[1]),
6325 int($_[1]*100/$progress_size)),"<br>\n";
6326 $last_progress_time = $time_now;
6328 $progress_step = $st;
6331 # No total size .. so only show in 100k jumps
6332 if ($_[1] > $last_progress_size+100*1024) {
6333 print $sp,&text('progress_data2n',
6334 &nice_size($_[1])),"<br>\n";
6335 $last_progress_size = $_[1];
6339 elsif ($_[0] == 4) {
6340 # All done downloading
6341 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6343 elsif ($_[0] == 5) {
6344 # Got new location after redirect
6345 $progress_callback_url = $_[1];
6347 elsif ($_[0] == 6) {
6349 $progress_callback_url = $_[1];
6350 print &text('progress_incache', $progress_callback_url),"<br>\n";
6354 =head2 switch_to_remote_user
6356 Changes the user and group of the current process to that of the unix user
6357 with the same name as the current webmin login, or fails if there is none.
6358 This should be called by Usermin module scripts that only need to run with
6359 limited permissions.
6362 sub switch_to_remote_user
6364 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6366 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6367 &create_missing_homedir(\@remote_user_info);
6369 &switch_to_unix_user(\@remote_user_info);
6370 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6371 $ENV{'HOME'} = $remote_user_info[7];
6373 # Export global variables to caller
6374 if ($main::export_to_caller) {
6375 my ($callpkg) = caller();
6376 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6380 =head2 switch_to_unix_user(&user-details)
6382 Switches the current process to the UID and group ID from the given list
6383 of user details, which must be in the format returned by getpwnam.
6386 sub switch_to_unix_user
6389 if (!defined($uinfo->[0])) {
6390 # No username given, so just use given GID
6391 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6394 # Use all groups from user
6395 ($(, $)) = ( $uinfo->[3],
6396 "$uinfo->[3] ".join(" ", $uinfo->[3],
6397 &other_groups($uinfo->[0])) );
6400 POSIX::setuid($uinfo->[2]);
6402 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6403 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6407 =head2 eval_as_unix_user(username, &code)
6409 Runs some code fragment with the effective UID and GID switch to that
6410 of the given Unix user, so that file IO takes place with his permissions.
6414 sub eval_as_unix_user
6416 my ($user, $code) = @_;
6417 my @uinfo = getpwnam($user);
6418 if (!scalar(@uinfo)) {
6419 &error("eval_as_unix_user called with invalid user $user");
6421 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6425 local $main::error_must_die = 1;
6432 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6435 return wantarray ? @rv : $rv[0];
6438 =head2 create_user_config_dirs
6440 Creates per-user config directories and sets $user_config_directory and
6441 $user_module_config_directory to them. Also reads per-user module configs
6442 into %userconfig. This should be called by Usermin module scripts that need
6443 to store per-user preferences or other settings.
6446 sub create_user_config_dirs
6448 return if (!$gconfig{'userconfig'});
6449 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6450 return if (!@uinfo || !$uinfo[7]);
6451 &create_missing_homedir(\@uinfo);
6452 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6453 if (!-d $user_config_directory) {
6454 mkdir($user_config_directory, 0700) ||
6455 &error("Failed to create $user_config_directory : $!");
6456 if ($< == 0 && $uinfo[2]) {
6457 chown($uinfo[2], $uinfo[3], $user_config_directory);
6460 if (&get_module_name()) {
6461 $user_module_config_directory = $user_config_directory."/".
6463 if (!-d $user_module_config_directory) {
6464 mkdir($user_module_config_directory, 0700) ||
6465 &error("Failed to create $user_module_config_directory : $!");
6466 if ($< == 0 && $uinfo[2]) {
6467 chown($uinfo[2], $uinfo[3], $user_config_directory);
6471 &read_file_cached("$module_root_directory/defaultuconfig",
6473 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6474 &read_file_cached("$user_module_config_directory/config",
6478 # Export global variables to caller
6479 if ($main::export_to_caller) {
6480 my ($callpkg) = caller();
6481 foreach my $v ('$user_config_directory',
6482 '$user_module_config_directory', '%userconfig') {
6483 my ($vt, $vn) = split('', $v, 2);
6484 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6489 =head2 create_missing_homedir(&uinfo)
6491 If auto homedir creation is enabled, create one for this user if needed.
6492 For internal use only.
6495 sub create_missing_homedir
6498 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6499 # Use has no home dir .. make one
6500 system("mkdir -p ".quotemeta($uinfo->[7]));
6501 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6502 if ($gconfig{'create_homedir_perms'} ne '') {
6503 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6508 =head2 filter_javascript(text)
6510 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6511 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6514 sub filter_javascript
6517 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6518 $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;
6519 $rv =~ s/(javascript:)/x$1/gi;
6520 $rv =~ s/(vbscript:)/x$1/gi;
6524 =head2 resolve_links(path)
6526 Given a path that may contain symbolic links, returns the real path.
6532 $path =~ s/\/+/\//g;
6533 $path =~ s/\/$// if ($path ne "/");
6534 my @p = split(/\/+/, $path);
6536 for(my $i=0; $i<@p; $i++) {
6537 my $sofar = "/".join("/", @p[0..$i]);
6538 my $lnk = readlink($sofar);
6539 if ($lnk eq $sofar) {
6540 # Link to itself! Cannot do anything more really ..
6543 elsif ($lnk =~ /^\//) {
6544 # Link is absolute..
6545 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6549 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6555 =head2 simplify_path(path, bogus)
6557 Given a path, maybe containing elements ".." and "." , convert it to a
6558 clean, absolute form. Returns undef if this is not possible.
6566 my @bits = split(/\/+/, $dir);
6569 foreach my $b (@bits) {
6573 elsif ($b eq "..") {
6575 if (scalar(@fixedbits) == 0) {
6576 # Cannot! Already at root!
6583 push(@fixedbits, $b);
6586 return "/".join('/', @fixedbits);
6589 =head2 same_file(file1, file2)
6591 Returns 1 if two files are actually the same
6596 return 1 if ($_[0] eq $_[1]);
6597 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6598 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6599 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6600 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6601 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6602 return 0 if (!@stat1 || !@stat2);
6603 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6606 =head2 flush_webmin_caches
6608 Clears all in-memory and on-disk caches used by Webmin.
6611 sub flush_webmin_caches
6613 undef(%main::read_file_cache);
6614 undef(%main::acl_hash_cache);
6615 undef(%main::acl_array_cache);
6616 undef(%main::has_command_cache);
6617 undef(@main::list_languages_cache);
6618 undef($main::got_list_usermods_cache);
6619 undef(@main::list_usermods_cache);
6620 undef(%main::foreign_installed_cache);
6621 unlink("$config_directory/module.infos.cache");
6622 &get_all_module_infos();
6625 =head2 list_usermods
6627 Returns a list of additional module restrictions. For internal use in
6633 if (!$main::got_list_usermods_cache) {
6634 @main::list_usermods_cache = ( );
6636 open(USERMODS, "$config_directory/usermin.mods");
6638 if (/^([^:]+):(\+|-|):(.*)/) {
6639 push(@main::list_usermods_cache,
6640 [ $1, $2, [ split(/\s+/, $3) ] ]);
6644 $main::got_list_usermods_cache = 1;
6646 return @main::list_usermods_cache;
6649 =head2 available_usermods(&allmods, &usermods)
6651 Returns a list of modules that are available to the given user, based
6652 on usermod additional/subtractions. For internal use by Usermin only.
6655 sub available_usermods
6657 return @{$_[0]} if (!@{$_[1]});
6659 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6660 my @uinfo = @remote_user_info;
6661 @uinfo = getpwnam($remote_user) if (!@uinfo);
6662 foreach my $u (@{$_[1]}) {
6664 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6667 elsif ($u->[0] =~ /^\@(.*)$/) {
6668 # Check for group membership
6669 my @ginfo = getgrnam($1);
6670 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6671 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6673 elsif ($u->[0] =~ /^\//) {
6674 # Check users and groups in file
6676 open(USERFILE, $u->[0]);
6679 if ($_ eq $remote_user) {
6682 elsif (/^\@(.*)$/) {
6683 my @ginfo = getgrnam($1);
6685 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6686 &indexof($remote_user,
6687 split(/\s+/, $ginfo[3])) >= 0));
6694 if ($u->[1] eq "+") {
6695 map { $mods{$_}++ } @{$u->[2]};
6697 elsif ($u->[1] eq "-") {
6698 map { delete($mods{$_}) } @{$u->[2]};
6702 map { $mods{$_}++ } @{$u->[2]};
6706 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6709 =head2 get_available_module_infos(nocache)
6711 Returns a list of modules available to the current user, based on
6712 operating system support, access control and usermod restrictions. Useful
6713 in themes that need to display a list of modules the user can use.
6714 Each element of the returned array is a hash reference in the same format as
6715 returned by get_module_info.
6718 sub get_available_module_infos
6721 &read_acl(\%acl, \%uacl);
6722 my $risk = $gconfig{'risk_'.$base_remote_user};
6724 foreach my $minfo (&get_all_module_infos($_[0])) {
6725 next if (!&check_os_support($minfo));
6727 # Check module risk level
6728 next if ($risk ne 'high' && $minfo->{'risk'} &&
6729 $minfo->{'risk'} !~ /$risk/);
6733 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6734 !$acl{$base_remote_user,"*"});
6736 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6740 # Check usermod restrictions
6741 my @usermods = &list_usermods();
6742 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6743 &available_usermods(\@rv, \@usermods);
6745 # Check RBAC restrictions
6747 foreach my $m (@rv) {
6748 if (&supports_rbac($m->{'dir'}) &&
6749 &use_rbac_module_acl(undef, $m->{'dir'})) {
6750 local $rbacs = &get_rbac_module_acl($remote_user,
6758 # Module or system doesn't support RBAC
6759 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6765 if (defined(&theme_foreign_available)) {
6766 foreach my $m (@rbacrv) {
6767 if (&theme_foreign_available($m->{'dir'})) {
6776 # Check licence module vetos
6778 if ($main::licence_module) {
6779 foreach my $m (@themerv) {
6780 if (&foreign_call($main::licence_module,
6781 "check_module_licence", $m->{'dir'})) {
6793 =head2 get_visible_module_infos(nocache)
6795 Like get_available_module_infos, but excludes hidden modules from the list.
6796 Each element of the returned array is a hash reference in the same format as
6797 returned by get_module_info.
6800 sub get_visible_module_infos
6803 my $pn = &get_product_name();
6804 return grep { !$_->{'hidden'} &&
6805 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6808 =head2 get_visible_modules_categories(nocache)
6810 Returns a list of Webmin module categories, each of which is a hash ref
6811 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6812 of modules in the category, in the format returned by get_module_info.
6813 Un-used modules are automatically assigned to the 'unused' category, and
6814 those with no category are put into 'others'.
6817 sub get_visible_modules_categories
6820 my @mods = &get_visible_module_infos($nocache);
6822 if (&get_product_name() eq 'webmin') {
6823 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6824 @mods = grep { $_->{'installed'} ne '0' } @mods;
6826 my %cats = &list_categories(\@mods);
6828 foreach my $c (keys %cats) {
6829 my $cat = { 'code' => $c || 'other',
6830 'desc' => $cats{$c} };
6831 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6834 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6835 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6837 # Add un-installed modules in magic category
6838 my $cat = { 'code' => 'unused',
6839 'desc' => $text{'main_unused'},
6841 'modules' => \@unmods };
6847 =head2 is_under_directory(directory, file)
6849 Returns 1 if the given file is under the specified directory, 0 if not.
6850 Symlinks are taken into account in the file to find it's 'real' location.
6853 sub is_under_directory
6855 my ($dir, $file) = @_;
6856 return 1 if ($dir eq "/");
6857 return 0 if ($file =~ /\.\./);
6858 my $ld = &resolve_links($dir);
6860 return &is_under_directory($ld, $file);
6862 my $lp = &resolve_links($file);
6864 return &is_under_directory($dir, $lp);
6866 return 0 if (length($file) < length($dir));
6867 return 1 if ($dir eq $file);
6869 return substr($file, 0, length($dir)) eq $dir;
6872 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6874 Given an absolute URL, returns the host, port, page and ssl flag components.
6875 Relative URLs can also be parsed, if the base information is provided.
6880 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6882 my $ssl = $1 eq 'https';
6883 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6889 elsif ($_[0] =~ /^\/\S*$/) {
6890 # A relative to the server URL
6891 return ($_[1], $_[2], $_[0], $_[4]);
6894 # A relative to the directory URL
6896 $page =~ s/[^\/]+$//;
6897 return ($_[1], $_[2], $page.$_[0], $_[4]);
6901 =head2 check_clicks_function
6903 Returns HTML for a JavaScript function called check_clicks that returns
6904 true when first called, but false subsequently. Useful on onClick for
6905 critical buttons. Deprecated, as this method of preventing duplicate actions
6909 sub check_clicks_function
6914 function check_clicks(form)
6921 for(i=0; i<form.length; i++)
6922 form.elements[i].disabled = true;
6931 =head2 load_entities_map
6933 Returns a hash ref containing mappings between HTML entities (like ouml) and
6934 ascii values (like 246). Mainly for internal use.
6937 sub load_entities_map
6939 if (!%entities_map_cache) {
6941 open(EMAP, "$root_directory/entities_map.txt");
6943 if (/^(\d+)\s+(\S+)/) {
6944 $entities_map_cache{$2} = $1;
6949 return \%entities_map_cache;
6952 =head2 entities_to_ascii(string)
6954 Given a string containing HTML entities like ö and 7, replace them
6955 with their ASCII equivalents.
6958 sub entities_to_ascii
6961 my $emap = &load_entities_map();
6962 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6963 $str =~ s/&#(\d+);/chr($1)/ge;
6967 =head2 get_product_name
6969 Returns either 'webmin' or 'usermin', depending on which program the current
6970 module is in. Useful for modules that can be installed into either.
6973 sub get_product_name
6975 return $gconfig{'product'} if (defined($gconfig{'product'}));
6976 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6981 Returns the character set for the current language, such as iso-8859-1.
6986 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6987 $current_lang_info->{'charset'} ?
6988 $current_lang_info->{'charset'} : $default_charset;
6992 =head2 get_display_hostname
6994 Returns the system's hostname for UI display purposes. This may be different
6995 from the actual hostname if you administrator has configured it so in the
6996 Webmin Configuration module.
6999 sub get_display_hostname
7001 if ($gconfig{'hostnamemode'} == 0) {
7002 return &get_system_hostname();
7004 elsif ($gconfig{'hostnamemode'} == 3) {
7005 return $gconfig{'hostnamedisplay'};
7008 my $h = $ENV{'HTTP_HOST'};
7010 if ($gconfig{'hostnamemode'} == 2) {
7011 $h =~ s/^(www|ftp|mail)\.//i;
7017 =head2 save_module_config([&config], [modulename])
7019 Saves the configuration for some module. The config parameter is an optional
7020 hash reference of names and values to save, which defaults to the global
7021 %config hash. The modulename parameter is the module to update the config
7022 file, which defaults to the current module.
7025 sub save_module_config
7027 my $c = $_[0] || { &get_module_variable('%config') };
7028 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7029 &write_file("$config_directory/$m/config", $c);
7032 =head2 save_user_module_config([&config], [modulename])
7034 Saves the user's Usermin preferences for some module. The config parameter is
7035 an optional hash reference of names and values to save, which defaults to the
7036 global %userconfig hash. The modulename parameter is the module to update the
7037 config file, which defaults to the current module.
7040 sub save_user_module_config
7042 my $c = $_[0] || { &get_module_variable('%userconfig') };
7043 my $m = $_[1] || &get_module_name();
7044 my $ucd = $user_config_directory;
7046 my @uinfo = @remote_user_info ? @remote_user_info
7047 : getpwnam($remote_user);
7048 return if (!@uinfo || !$uinfo[7]);
7049 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7051 &write_file("$ucd/$m/config", $c);
7054 =head2 nice_size(bytes, [min])
7056 Converts a number of bytes into a number followed by a suffix like GB, MB
7057 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7058 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7063 my ($units, $uname);
7064 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7065 $units = 1024*1024*1024*1024;
7068 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7069 $units = 1024*1024*1024;
7072 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7076 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7084 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7086 return $sz." ".$uname;
7089 =head2 get_perl_path
7091 Returns the path to Perl currently in use, such as /usr/bin/perl.
7096 if (open(PERL, "$config_directory/perl-path")) {
7102 return $^X if (-x $^X);
7103 return &has_command("perl");
7106 =head2 get_goto_module([&mods])
7108 Returns the details of a module that the current user should be re-directed
7109 to after logging in, or undef if none. Useful for themes.
7114 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7115 if ($gconfig{'gotomodule'}) {
7116 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7117 return $goto if ($goto);
7119 if (@mods == 1 && $gconfig{'gotoone'}) {
7125 =head2 select_all_link(field, form, [text])
7127 Returns HTML for a 'Select all' link that uses Javascript to select
7128 multiple checkboxes with the same name. The parameters are :
7130 =item field - Name of the checkbox inputs.
7132 =item form - Index of the form on the page.
7134 =item text - Message for the link, defaulting to 'Select all'.
7139 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7140 my ($field, $form, $text) = @_;
7142 $text ||= $text{'ui_selall'};
7143 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7146 =head2 select_invert_link(field, form, text)
7148 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7149 selection on multiple checkboxes with the same name. The parameters are :
7151 =item field - Name of the checkbox inputs.
7153 =item form - Index of the form on the page.
7155 =item text - Message for the link, defaulting to 'Invert selection'.
7158 sub select_invert_link
7160 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7161 my ($field, $form, $text) = @_;
7163 $text ||= $text{'ui_selinv'};
7164 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7167 =head2 select_rows_link(field, form, text, &rows)
7169 Returns HTML for a link that uses Javascript to select rows with particular
7170 values for their checkboxes. The parameters are :
7172 =item field - Name of the checkbox inputs.
7174 =item form - Index of the form on the page.
7176 =item text - Message for the link, de
7178 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7181 sub select_rows_link
7183 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7184 my ($field, $form, $text, $rows) = @_;
7186 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7187 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7188 $js .= "return false;";
7189 return "<a href='#' onClick='$js'>$text</a>";
7192 =head2 check_pid_file(file)
7194 Given a pid file, returns the PID it contains if the process is running.
7199 open(PIDFILE, $_[0]) || return undef;
7200 my $pid = <PIDFILE>;
7202 $pid =~ /^\s*(\d+)/ || return undef;
7203 kill(0, $1) || return undef;
7209 Return the local os-specific library name to this module. For internal use only.
7214 my $mn = &get_module_name();
7215 my $md = &module_root_directory($mn);
7216 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7217 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7219 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7220 return "$mn-$gconfig{'os_type'}-lib.pl";
7222 elsif (-r "$md/$mn-generic-lib.pl") {
7223 return "$mn-generic-lib.pl";
7230 =head2 module_root_directory(module)
7232 Given a module name, returns its root directory. On a typical Webmin install,
7233 all modules are under the same directory - but it is theoretically possible to
7237 sub module_root_directory
7239 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7240 if (@root_directories > 1) {
7241 foreach my $r (@root_directories) {
7247 return "$root_directories[0]/$d";
7250 =head2 list_mime_types
7252 Returns a list of all known MIME types and their extensions, as a list of hash
7253 references with keys :
7255 =item type - The MIME type, like text/plain.
7257 =item exts - A list of extensions, like .doc and .avi.
7259 =item desc - A human-readable description for the MIME type.
7264 if (!@list_mime_types_cache) {
7266 open(MIME, "$root_directory/mime.types");
7270 if (s/#\s*(.*)$//g) {
7273 my ($type, @exts) = split(/\s+/);
7275 push(@list_mime_types_cache, { 'type' => $type,
7282 return @list_mime_types_cache;
7285 =head2 guess_mime_type(filename, [default])
7287 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7288 The optional default parameter sets a default type of use if none is found,
7289 which defaults to application/octet-stream.
7294 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7296 foreach my $t (&list_mime_types()) {
7297 foreach my $e (@{$t->{'exts'}}) {
7298 return $t->{'type'} if (lc($e) eq lc($ext));
7302 return @_ > 1 ? $_[1] : "application/octet-stream";
7305 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7307 Opens a file handle for writing to a temporary file, which will only be
7308 renamed over the real file when the handle is closed. This allows critical
7309 files like /etc/shadow to be updated safely, even if writing fails part way
7310 through due to lack of disk space. The parameters are :
7312 =item handle - File handle to open, as you would use in Perl's open function.
7314 =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.
7316 =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 $! with the error code.
7318 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7320 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7326 # Just getting a temp file
7327 if (!defined($main::open_tempfiles{$_[0]})) {
7328 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7329 my $dir = $1 || "/";
7330 my $tmp = "$dir/$2.webmintmp.$$";
7331 $main::open_tempfiles{$_[0]} = $tmp;
7332 push(@main::temporary_files, $tmp);
7334 return $main::open_tempfiles{$_[0]};
7338 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7339 $fh = &callers_package($fh);
7341 my %gaccess = &get_module_acl(undef, "");
7342 my $db = $gconfig{'debug_what_write'};
7343 if ($file =~ /\r|\n|\0/) {
7344 if ($noerror) { return 0; }
7345 else { &error("Filename contains invalid characters"); }
7347 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7348 # Read-only mode .. veto all writes
7349 print STDERR "vetoing write to $file\n";
7350 return open($fh, ">$null_file");
7352 elsif ($file =~ /^(>|>>|)nul$/i) {
7353 # Write to Windows null device
7354 &webmin_debug_log($1 eq ">" ? "WRITE" :
7355 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7357 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7358 # Writes to /dev/null or TTYs don't need to be handled
7359 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7360 return open($fh, $file);
7362 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7363 &webmin_debug_log("WRITE", $1) if ($db);
7364 # Over-writing a file, via a temp file
7366 $file = &translate_filename($file);
7368 # Open the link target instead
7369 $file = &resolve_links($file);
7372 # Cannot open a directory!
7373 if ($noerror) { return 0; }
7374 else { &error("Cannot write to directory $file"); }
7376 my $tmp = &open_tempfile($file);
7377 my $ex = open($fh, ">$tmp");
7378 if (!$ex && $! =~ /permission/i) {
7379 # Could not open temp file .. try opening actual file
7381 $ex = open($fh, ">$file");
7382 delete($main::open_tempfiles{$file});
7385 $main::open_temphandles{$fh} = $file;
7388 if (!$ex && !$noerror) {
7389 &error(&text("efileopen", $file, $!));
7393 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7394 # Just writing direct to a file
7395 &webmin_debug_log("WRITE", $1) if ($db);
7397 $file = &translate_filename($file);
7398 my @old_attributes = &get_clear_file_attributes($file);
7399 my $ex = open($fh, ">$file");
7400 &reset_file_attributes($file, \@old_attributes);
7401 $main::open_temphandles{$fh} = $file;
7402 if (!$ex && !$noerror) {
7403 &error(&text("efileopen", $file, $!));
7408 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7409 # Appending to a file .. nothing special to do
7410 &webmin_debug_log("APPEND", $1) if ($db);
7412 $file = &translate_filename($file);
7413 my @old_attributes = &get_clear_file_attributes($file);
7414 my $ex = open($fh, ">>$file");
7415 &reset_file_attributes($file, \@old_attributes);
7416 $main::open_temphandles{$fh} = $file;
7417 if (!$ex && !$noerror) {
7418 &error(&text("efileopen", $file, $!));
7423 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7424 # Read mode .. nothing to do here
7425 &webmin_debug_log("READ", $file) if ($db);
7426 $file = &translate_filename($file);
7427 return open($fh, $file);
7429 elsif ($file eq ">" || $file eq ">>") {
7430 my ($package, $filename, $line) = caller;
7431 if ($noerror) { return 0; }
7432 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7435 my ($package, $filename, $line) = caller;
7436 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7441 =head2 close_tempfile(file|handle)
7443 Copies a temp file to the actual file, assuming that all writes were
7444 successful. The handle must have been one passed to open_tempfile.
7450 my $fh = &callers_package($_[0]);
7452 if (defined($file = $main::open_temphandles{$fh})) {
7454 close($fh) || &error(&text("efileclose", $file, $!));
7455 delete($main::open_temphandles{$fh});
7456 return &close_tempfile($file);
7458 elsif (defined($main::open_tempfiles{$_[0]})) {
7460 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7461 my @st = stat($_[0]);
7462 if (&is_selinux_enabled() && &has_command("chcon")) {
7463 # Set original security context
7464 system("chcon --reference=".quotemeta($_[0]).
7465 " ".quotemeta($main::open_tempfiles{$_[0]}).
7466 " >/dev/null 2>&1");
7468 my @old_attributes = &get_clear_file_attributes($_[0]);
7469 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7471 # Set original permissions and ownership
7472 chmod($st[2], $_[0]);
7473 chown($st[4], $st[5], $_[0]);
7475 &reset_file_attributes($_[0], \@old_attributes);
7476 delete($main::open_tempfiles{$_[0]});
7477 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7478 if ($main::open_templocks{$_[0]}) {
7479 &unlock_file($_[0]);
7480 delete($main::open_templocks{$_[0]});
7485 # Must be closing a handle not associated with a file
7491 =head2 print_tempfile(handle, text, ...)
7493 Like the normal print function, but calls &error on failure. Useful when
7494 combined with open_tempfile, to ensure that a criticial file is never
7495 only partially written.
7500 my ($fh, @args) = @_;
7501 $fh = &callers_package($fh);
7502 (print $fh @args) || &error(&text("efilewrite",
7503 $main::open_temphandles{$fh} || $fh, $!));
7506 =head2 is_selinux_enabled
7508 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7511 sub is_selinux_enabled
7513 if (!defined($main::selinux_enabled_cache)) {
7515 if ($gconfig{'os_type'} !~ /-linux$/) {
7516 # Not on linux, so no way
7517 $main::selinux_enabled_cache = 0;
7519 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7520 # Use global config file
7521 $main::selinux_enabled_cache =
7522 $seconfig{'SELINUX'} eq 'disabled' ||
7523 !$seconfig{'SELINUX'} ? 0 : 1;
7526 # Use selinuxenabled command
7527 #$selinux_enabled_cache =
7528 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7529 $main::selinux_enabled_cache = 0;
7532 return $main::selinux_enabled_cache;
7535 =head2 get_clear_file_attributes(file)
7537 Finds file attributes that may prevent writing, clears them and returns them
7538 as a list. May call error. Mainly for internal use by open_tempfile and
7542 sub get_clear_file_attributes
7546 if ($gconfig{'chattr'}) {
7547 # Get original immutable bit
7548 my $out = &backquote_command(
7549 "lsattr ".quotemeta($file)." 2>/dev/null");
7551 $out =~ s/\s\S+\n//;
7552 @old_attributes = grep { $_ ne '-' } split(//, $out);
7554 if (&indexof("i", @old_attributes) >= 0) {
7555 my $err = &backquote_logged(
7556 "chattr -i ".quotemeta($file)." 2>&1");
7558 &error("Failed to remove immutable bit on ".
7563 return @old_attributes;
7566 =head2 reset_file_attributes(file, &attributes)
7568 Put back cleared attributes on some file. May call error. Mainly for internal
7569 use by close_tempfile.
7572 sub reset_file_attributes
7574 my ($file, $old_attributes) = @_;
7575 if (&indexof("i", @$old_attributes) >= 0) {
7576 my $err = &backquote_logged(
7577 "chattr +i ".quotemeta($file)." 2>&1");
7579 &error("Failed to restore immutable bit on ".
7585 =head2 cleanup_tempnames
7587 Remove all temporary files generated using transname. Typically only called
7588 internally when a Webmin script exits.
7591 sub cleanup_tempnames
7593 foreach my $t (@main::temporary_files) {
7596 @main::temporary_files = ( );
7599 =head2 open_lock_tempfile([handle], file, [no-error])
7601 Returns a temporary file for writing to some actual file, and also locks it.
7602 Effectively the same as calling lock_file and open_tempfile on the same file,
7603 but calls the unlock for you automatically when it is closed.
7606 sub open_lock_tempfile
7608 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7609 $fh = &callers_package($fh);
7610 my $lockfile = $file;
7611 $lockfile =~ s/^[^\/]*//;
7612 if ($lockfile =~ /^\//) {
7613 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7615 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7620 $main::end_exit_status ||= $?;
7621 if ($$ == $main::initial_process_id) {
7622 # Exiting from initial process
7623 &cleanup_tempnames();
7624 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7625 $main::debug_log_start_module eq &get_module_name()) {
7626 my $len = time() - $main::debug_log_start_time;
7627 &webmin_debug_log("STOP", "runtime=$len");
7628 $main::debug_log_start_time = 0;
7630 if (!$ENV{'SCRIPT_NAME'} &&
7631 $main::initial_module_name eq &get_module_name()) {
7632 # In a command-line script - call the real exit, so that the
7633 # exit status gets properly propogated. In some cases this
7634 # was not happening.
7635 exit($main::end_exit_status);
7640 =head2 month_to_number(month)
7642 Converts a month name like feb to a number like 1.
7647 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7650 =head2 number_to_month(number)
7652 Converts a number like 1 to a month name like Feb.
7657 return ucfirst($number_to_month_map{$_[0]});
7660 =head2 get_rbac_module_acl(user, module)
7662 Returns a hash reference of RBAC overrides ACLs for some user and module.
7663 May return undef if none exist (indicating access denied), or the string *
7664 if full access is granted.
7667 sub get_rbac_module_acl
7669 my ($user, $mod) = @_;
7670 eval "use Authen::SolarisRBAC";
7671 return undef if ($@);
7674 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7675 # Automagic webmin.modulename.admin authorization exists .. allow access
7677 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7678 %rv = ( 'noconfig' => 1 );
7685 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7689 my ($auths, $acls) = split(/\s+/, $_);
7690 my @auths = split(/,/, $auths);
7692 my ($merge) = ($acls =~ s/^\+//);
7694 if ($auths eq "*") {
7695 # These ACLs apply to all RBAC users.
7696 # Only if there is some that match a specific authorization
7697 # later will they be used though.
7700 # Check each of the RBAC authorizations
7701 foreach my $a (@auths) {
7702 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7707 $foundany++ if ($gotall);
7710 # Found an RBAC authorization - return the ACLs
7711 return "*" if ($acls eq "*");
7712 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7714 # Just add to current set
7715 foreach my $a (keys %acl) {
7726 return !$foundany ? undef : %rv ? \%rv : undef;
7729 =head2 supports_rbac([module])
7731 Returns 1 if RBAC client support is available, such as on Solaris.
7736 return 0 if ($gconfig{'os_type'} ne 'solaris');
7737 eval "use Authen::SolarisRBAC";
7740 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7745 =head2 use_rbac_module_acl(user, module)
7747 Returns 1 if some user should use RBAC to get permissions for a module
7750 sub use_rbac_module_acl
7752 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7753 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7754 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7755 my %access = &get_module_acl($u, $m, 1);
7756 return $access{'rbac'} ? 1 : 0;
7759 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7761 Runs some command, possibly feeding it input and capturing output to the
7762 give files or scalar references. The parameters are :
7764 =item command - Full command to run, possibly including shell meta-characters.
7766 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7768 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7770 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7772 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7774 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7779 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7780 if (&is_readonly_mode() && !$safe) {
7781 print STDERR "Vetoing command $_[0]\n";
7785 $cmd = &translate_command($cmd);
7787 # Use ` operator where possible
7788 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7789 if (!$stdin && ref($stdout) && !$stderr) {
7790 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7791 $$stdout = `$cmd 2>$null_file`;
7794 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7795 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7796 $$stdout = `$cmd 2>&1`;
7799 elsif (!$stdin && !$stdout && !$stderr) {
7800 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7801 return system("$cmd >$null_file 2>$null_file <$null_file");
7805 $| = 1; # needed on some systems to flush before forking
7806 pipe(EXECSTDINr, EXECSTDINw);
7807 pipe(EXECSTDOUTr, EXECSTDOUTw);
7808 pipe(EXECSTDERRr, EXECSTDERRw);
7810 if (!($pid = fork())) {
7814 open(STDIN, "<&EXECSTDINr");
7815 open(STDOUT, ">&EXECSTDOUTw");
7816 if (ref($stderr) && $stderr eq $stdout) {
7817 open(STDERR, ">&EXECSTDOUTw");
7820 open(STDERR, ">&EXECSTDERRw");
7827 my $fullcmd = "($cmd)";
7828 if ($stdin && !ref($stdin)) {
7829 $fullcmd .= " <$stdin";
7831 if ($stdout && !ref($stdout)) {
7832 $fullcmd .= " >$stdout";
7834 if ($stderr && !ref($stderr)) {
7835 if ($stderr eq $stdout) {
7836 $fullcmd .= " 2>&1";
7839 $fullcmd .= " 2>$stderr";
7842 if ($gconfig{'os_type'} eq 'windows') {
7846 exec("/bin/sh", "-c", $fullcmd);
7848 print "Exec failed : $!\n";
7855 # Feed input and capture output
7857 if ($stdin && ref($stdin)) {
7858 print EXECSTDINw $$stdin;
7861 if ($stdout && ref($stdout)) {
7863 while(<EXECSTDOUTr>) {
7868 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7870 while(<EXECSTDERRr>) {
7881 =head2 open_readfile(handle, file)
7883 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7884 exactly the same as Perl's open function.
7889 my ($fh, $file) = @_;
7890 $fh = &callers_package($fh);
7891 my $realfile = &translate_filename($file);
7892 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7893 return open($fh, "<".$realfile);
7896 =head2 open_execute_command(handle, command, output?, safe?)
7898 Runs some command, with the specified file handle set to either write to it if
7899 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7900 indicates if the command modifies the state of the system or not.
7903 sub open_execute_command
7905 my ($fh, $cmd, $mode, $safe) = @_;
7906 $fh = &callers_package($fh);
7907 my $realcmd = &translate_command($cmd);
7908 if (&is_readonly_mode() && !$safe) {
7909 # Don't actually run it
7910 print STDERR "vetoing command $cmd\n";
7913 return open($fh, ">$null_file");
7916 return open($fh, $null_file);
7920 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7921 if ($gconfig{'debug_what_cmd'});
7923 return open($fh, "| $cmd");
7925 elsif ($mode == 1) {
7926 return open($fh, "$cmd 2>$null_file |");
7928 elsif ($mode == 2) {
7929 return open($fh, "$cmd 2>&1 |");
7933 =head2 translate_filename(filename)
7935 Applies all relevant registered translation functions to a filename. Mostly
7936 for internal use, and typically does nothing.
7939 sub translate_filename
7941 my ($realfile) = @_;
7942 my @funcs = grep { $_->[0] eq &get_module_name() ||
7943 !defined($_->[0]) } @main::filename_callbacks;
7944 foreach my $f (@funcs) {
7946 $realfile = &$func($realfile, @{$f->[2]});
7951 =head2 translate_command(filename)
7953 Applies all relevant registered translation functions to a command. Mostly
7954 for internal use, and typically does nothing.
7957 sub translate_command
7960 my @funcs = grep { $_->[0] eq &get_module_name() ||
7961 !defined($_->[0]) } @main::command_callbacks;
7962 foreach my $f (@funcs) {
7964 $realcmd = &$func($realcmd, @{$f->[2]});
7969 =head2 register_filename_callback(module|undef, &function, &args)
7971 Registers some function to be called when the specified module (or all
7972 modules) tries to open a file for reading and writing. The function must
7973 return the actual file to open. This allows you to override which files
7974 other code actually operates on, via the translate_filename function.
7977 sub register_filename_callback
7979 my ($mod, $func, $args) = @_;
7980 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7983 =head2 register_command_callback(module|undef, &function, &args)
7985 Registers some function to be called when the specified module (or all
7986 modules) tries to execute a command. The function must return the actual
7987 command to run. This allows you to override which commands other other code
7988 actually runs, via the translate_command function.
7991 sub register_command_callback
7993 my ($mod, $func, $args) = @_;
7994 push(@main::command_callbacks, [ $mod, $func, $args ]);
7997 =head2 capture_function_output(&function, arg, ...)
7999 Captures output that some function prints to STDOUT, and returns it. Useful
8000 for functions outside your control that print data when you really want to
8001 manipulate it before output.
8004 sub capture_function_output
8006 my ($func, @args) = @_;
8007 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8008 my $old = select(SOCKET1);
8009 my @rv = &$func(@args);
8018 return wantarray ? ($out, \@rv) : $out;
8021 =head2 capture_function_output_tempfile(&function, arg, ...)
8023 Behaves the same as capture_function_output, but uses a temporary file
8024 to avoid buffer full problems.
8027 sub capture_function_output_tempfile
8029 my ($func, @args) = @_;
8030 my $temp = &transname();
8031 open(BUFFER, ">$temp");
8032 my $old = select(BUFFER);
8033 my @rv = &$func(@args);
8036 my $out = &read_file_contents($temp);
8037 &unlink_file($temp);
8038 return wantarray ? ($out, \@rv) : $out;
8041 =head2 modules_chooser_button(field, multiple, [form])
8043 Returns HTML for a button for selecting one or many Webmin modules.
8044 field - Name of the HTML field to place the module names into.
8045 multiple - Set to 1 if multiple modules can be selected.
8046 form - Index of the form on the page.
8049 sub modules_chooser_button
8051 return &theme_modules_chooser_button(@_)
8052 if (defined(&theme_modules_chooser_button));
8053 my $form = defined($_[2]) ? $_[2] : 0;
8054 my $w = $_[1] ? 700 : 500;
8056 if ($_[1] && $gconfig{'db_sizemodules'}) {
8057 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8059 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8060 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8062 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";
8065 =head2 substitute_template(text, &hash)
8067 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8068 the text replaces it with the value of the hash key foo. Also supports blocks
8069 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8070 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8073 sub substitute_template
8075 # Add some extra fixed parameters to the hash
8076 my %hash = %{$_[1]};
8077 $hash{'hostname'} = &get_system_hostname();
8078 $hash{'webmin_config'} = $config_directory;
8079 $hash{'webmin_etc'} = $config_directory;
8080 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8081 $hash{'webmin_var'} = $var_directory;
8083 # Add time-based parameters, for use in DNS
8084 $hash{'current_time'} = time();
8085 my @tm = localtime($hash{'current_time'});
8086 $hash{'current_year'} = $tm[5]+1900;
8087 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8088 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8089 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8090 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8091 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8093 # Actually do the substition
8095 foreach my $s (keys %hash) {
8096 next if ($s eq ''); # Prevent just $ from being subbed
8099 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8100 $rv =~ s/\$\Q$us\E/$sv/g;
8102 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8103 # and ${IF}..${ENDIF} with value
8104 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8105 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8107 # Replace $IF..$ELSE..$ENDIF block with first value,
8108 # and $IF..$ENDIF with value
8109 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8110 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8112 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8113 # matching, nothing if not
8114 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8115 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8117 # Replace $IFEQ..$ENDIFEQ block with first value if
8118 # matching, nothing if not
8119 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8120 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8123 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8124 # and ${IF}..${ENDIF} with nothing
8125 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8126 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8128 # Replace $IF..$ELSE..$ENDIF block with second value,
8129 # and $IF..$ENDIF with nothing
8130 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8131 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8133 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8134 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8135 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8139 # Now assume any $IF blocks whose variables are not present in the hash
8140 # evaluate to false.
8141 # $IF...$ELSE x $ENDIF => x
8142 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8143 # $IF...x...$ENDIF => (nothing)
8144 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8145 # ${var} => (nothing)
8146 $rv =~ s/\$\{[A-Z]+\}//g;
8151 =head2 running_in_zone
8153 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8154 disable module and features that are not appropriate, like those that modify
8155 mounted filesystems.
8160 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8161 $gconfig{'os_version'} < 10);
8162 my $zn = `zonename 2>$null_file`;
8164 return $zn && $zn ne "global";
8167 =head2 running_in_vserver
8169 Returns 1 if the current Webmin instance is running in a Linux VServer.
8170 Used to disable modules and features that are not appropriate.
8173 sub running_in_vserver
8175 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8178 open(MTAB, "/etc/mtab");
8180 my ($dev, $mp) = split(/\s+/, $_);
8181 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8190 =head2 running_in_xen
8192 Returns 1 if Webmin is running inside a Xen instance, by looking
8193 at /proc/xen/capabilities.
8198 return 0 if (!-r "/proc/xen/capabilities");
8199 my $cap = &read_file_contents("/proc/xen/capabilities");
8200 return $cap =~ /control_d/ ? 0 : 1;
8203 =head2 running_in_openvz
8205 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8206 at /proc/vz/veinfo for a non-zero line.
8209 sub running_in_openvz
8211 return 0 if (!-r "/proc/vz/veinfo");
8212 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8213 return 0 if (!$lref || !@$lref);
8214 foreach my $l (@$lref) {
8216 my @ll = split(/\s+/, $l);
8217 return 0 if ($ll[0] eq '0');
8222 =head2 list_categories(&modules, [include-empty])
8224 Returns a hash mapping category codes to names, including any custom-defined
8225 categories. The modules parameter must be an array ref of module hash objects,
8226 as returned by get_all_module_infos.
8231 my ($mods, $empty) = @_;
8232 my (%cats, %catnames);
8233 &read_file("$config_directory/webmin.catnames", \%catnames);
8234 foreach my $o (@lang_order_list) {
8235 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8240 foreach my $m (@$mods) {
8241 my $c = $m->{'category'};
8242 next if ($cats{$c});
8243 if (defined($catnames{$c})) {
8244 $cats{$c} = $catnames{$c};
8246 elsif ($text{"category_$c"}) {
8247 $cats{$c} = $text{"category_$c"};
8250 # try to get category name from module ..
8251 my %mtext = &load_language($m->{'dir'});
8252 if ($mtext{"category_$c"}) {
8253 $cats{$c} = $mtext{"category_$c"};
8256 $c = $m->{'category'} = "";
8257 $cats{$c} = $text{"category_$c"};
8264 =head2 is_readonly_mode
8266 Returns 1 if the current user is in read-only mode, and thus all writes
8267 to files and command execution should fail.
8270 sub is_readonly_mode
8272 if (!defined($main::readonly_mode_cache)) {
8273 my %gaccess = &get_module_acl(undef, "");
8274 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8276 return $main::readonly_mode_cache;
8279 =head2 command_as_user(user, with-env?, command, ...)
8281 Returns a command to execute some command as the given user, using the
8282 su statement. If on Linux, the /bin/sh shell is forced in case the user
8283 does not have a valid shell. If with-env is set to 1, the -s flag is added
8284 to the su command to read the user's .profile or .bashrc file.
8289 my ($user, $env, @args) = @_;
8290 my @uinfo = getpwnam($user);
8291 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8292 # User shell doesn't appear to be valid
8293 if ($gconfig{'os_type'} =~ /-linux$/) {
8294 # Use -s /bin/sh to force it
8295 $shellarg = " -s /bin/sh";
8297 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8298 $gconfig{'os_type'} eq 'solaris' &&
8299 $gconfig{'os_version'} >= 11 ||
8300 $gconfig{'os_type'} eq 'macos') {
8301 # Use -m and force /bin/sh
8302 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8306 my $rv = "su".($env ? " -" : "").$shellarg.
8307 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8311 =head2 list_osdn_mirrors(project, file)
8313 This function is now deprecated in favor of letting sourceforge just
8314 redirect to the best mirror, and now just returns their primary download URL.
8317 sub list_osdn_mirrors
8319 my ($project, $file) = @_;
8320 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8322 'mirror' => 'downloads' } );
8325 =head2 convert_osdn_url(url)
8327 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8328 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8329 to a real URL on the sourceforge download redirector.
8332 sub convert_osdn_url
8335 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8336 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8337 # Always use the Sourceforge mail download URL, which does
8338 # a location-based redirect for us
8339 my ($project, $file) = ($1, $2);
8340 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8342 return wantarray ? ( $url, 0 ) : $url;
8345 # Some other source .. don't change
8346 return wantarray ? ( $url, 2 ) : $url;
8350 =head2 get_current_dir
8352 Returns the directory the current process is running in.
8358 if ($gconfig{'os_type'} eq 'windows') {
8371 =head2 supports_users
8373 Returns 1 if the current OS supports Unix user concepts and functions like
8374 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8380 return $gconfig{'os_type'} ne 'windows';
8383 =head2 supports_symlinks
8385 Returns 1 if the current OS supports symbolic and hard links. This will not
8386 be the case on Windows.
8389 sub supports_symlinks
8391 return $gconfig{'os_type'} ne 'windows';
8394 =head2 quote_path(path)
8396 Returns a path with safe quoting for the current operating system.
8402 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8403 # Windows only supports "" style quoting
8407 return quotemeta($path);
8411 =head2 get_windows_root
8413 Returns the base windows system directory, like c:/windows.
8416 sub get_windows_root
8418 if ($ENV{'SystemRoot'}) {
8419 my $rv = $ENV{'SystemRoot'};
8424 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8428 =head2 read_file_contents(file)
8430 Given a filename, returns its complete contents as a string. Effectively
8431 the same as the Perl construct `cat file`.
8434 sub read_file_contents
8436 &open_readfile(FILE, $_[0]) || return undef;
8443 =head2 unix_crypt(password, salt)
8445 Performs Unix encryption on a password, using the built-in crypt function or
8446 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8447 must be either an already-hashed password, or a two-character alpha-numeric
8453 my ($pass, $salt) = @_;
8454 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8455 my $rv = eval "crypt(\$pass, \$salt)";
8457 return $rv if ($rv && !$@);
8458 eval "use Crypt::UnixCrypt";
8460 return Crypt::UnixCrypt::crypt($pass, $salt);
8463 &error("Failed to encrypt password : $err");
8467 =head2 split_quoted_string(string)
8469 Given a string like I<foo "bar baz" quux>, returns the array :
8473 sub split_quoted_string
8477 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8478 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8479 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8486 =head2 write_to_http_cache(url, file|&data)
8488 Updates the Webmin cache with the contents of the given file, possibly also
8489 clearing out old data. Mainly for internal use by http_download.
8492 sub write_to_http_cache
8494 my ($url, $file) = @_;
8495 return 0 if (!$gconfig{'cache_size'});
8497 # Don't cache downloads that look dynamic
8498 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8502 # Check if the current module should do caching
8503 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8504 # Caching all except some modules
8505 my @mods = split(/\s+/, $1);
8506 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8508 elsif ($gconfig{'cache_mods'}) {
8509 # Only caching some modules
8510 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8511 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8517 $size = length($$file);
8520 my @st = stat($file);
8524 if ($size > $gconfig{'cache_size'}) {
8525 # Bigger than the whole cache - so don't save it
8530 $cfile = "$main::http_cache_directory/$cfile";
8532 # See how much we have cached currently, clearing old files
8534 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8535 opendir(CACHEDIR, $main::http_cache_directory);
8536 foreach my $f (readdir(CACHEDIR)) {
8537 next if ($f eq "." || $f eq "..");
8538 my $path = "$main::http_cache_directory/$f";
8539 my @st = stat($path);
8540 if ($gconfig{'cache_days'} &&
8541 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8542 # This file is too old .. trash it
8547 push(@cached, [ $path, $st[7], $st[9] ]);
8551 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8552 while($total+$size > $gconfig{'cache_size'} && @cached) {
8553 # Cache is too big .. delete some files until the new one will fit
8554 unlink($cached[0]->[0]);
8555 $total -= $cached[0]->[1];
8559 # Finally, write out the new file
8561 &open_tempfile(CACHEFILE, ">$cfile");
8562 &print_tempfile(CACHEFILE, $$file);
8563 &close_tempfile(CACHEFILE);
8566 my ($ok, $err) = ©_source_dest($file, $cfile);
8572 =head2 check_in_http_cache(url)
8574 If some URL is in the cache and valid, return the filename for it. Mainly
8575 for internal use by http_download.
8578 sub check_in_http_cache
8581 return undef if (!$gconfig{'cache_size'});
8583 # Check if the current module should do caching
8584 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8585 # Caching all except some modules
8586 my @mods = split(/\s+/, $1);
8587 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8589 elsif ($gconfig{'cache_mods'}) {
8590 # Only caching some modules
8591 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8592 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8597 $cfile = "$main::http_cache_directory/$cfile";
8598 my @st = stat($cfile);
8599 return undef if (!@st || !$st[7]);
8600 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8605 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8610 =head2 supports_javascript
8612 Returns 1 if the current browser is assumed to support javascript.
8615 sub supports_javascript
8617 if (defined(&theme_supports_javascript)) {
8618 return &theme_supports_javascript();
8620 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8623 =head2 get_module_name
8625 Returns the name of the Webmin module that called this function. For internal
8626 use only by other API functions.
8631 return &get_module_variable('$module_name');
8634 =head2 get_module_variable(name, [ref])
8636 Returns the value of some variable which is set in the caller's context, if
8637 using the new WebminCore package. For internal use only.
8640 sub get_module_variable
8642 my ($v, $wantref) = @_;
8643 my $slash = $wantref ? "\\" : "";
8644 my $thispkg = &web_libs_package();
8645 if ($thispkg eq 'WebminCore') {
8646 my ($vt, $vn) = split('', $v, 2);
8648 for(my $i=0; ($callpkg) = caller($i); $i++) {
8649 last if ($callpkg ne $thispkg);
8651 return eval "${slash}${vt}${callpkg}::${vn}";
8653 return eval "${slash}${v}";
8656 =head2 clear_time_locale()
8658 Temporarily force the locale to C, until reset_time_locale is called. This is
8659 useful if your code is going to call C<strftime> from the POSIX package, and
8660 you want to ensure that the output is in a consistent format.
8663 sub clear_time_locale
8665 if ($main::clear_time_locale_count == 0) {
8668 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8669 POSIX::setlocale(POSIX::LC_TIME, "C");
8672 $main::clear_time_locale_count++;
8675 =head2 reset_time_locale()
8677 Revert the locale to whatever it was before clear_time_locale was called
8680 sub reset_time_locale
8682 if ($main::clear_time_locale_count == 1) {
8684 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8685 $main::clear_time_locale_old = undef;
8688 $main::clear_time_locale_count--;
8691 =head2 callers_package(filehandle)
8693 Convert a non-module filehandle like FOO to one qualified with the
8694 caller's caller's package, like fsdump::FOO. For internal use only.
8700 my $callpkg = (caller(1))[0];
8701 my $thispkg = &web_libs_package();
8702 if (!ref($fh) && $fh !~ /::/ &&
8703 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8704 $fh = $callpkg."::".$fh;
8709 =head2 web_libs_package()
8711 Returns the package this code is in. We can't always trust __PACKAGE__. For
8715 sub web_libs_package
8717 if ($called_from_webmin_core) {
8718 return "WebminCore";
8723 $done_web_lib_funcs = 1;