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];
1597 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1602 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1604 Return HTML for a button that pops up a file chooser when clicked, and places
1605 the selected filename into another HTML field. The parameters are :
1607 =item input - Name of the form field to store the filename in.
1609 =item type - 0 for file or directory chooser, or 1 for directory only.
1611 =item form - Index of the form containing the button.
1613 =item chroot - If set to 1, the chooser will be limited to this directory.
1615 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1618 sub file_chooser_button
1620 return &theme_file_chooser_button(@_)
1621 if (defined(&theme_file_chooser_button));
1622 my $form = defined($_[2]) ? $_[2] : 0;
1623 my $chroot = defined($_[3]) ? $_[3] : "/";
1624 my $add = int($_[4]);
1625 my ($w, $h) = (400, 300);
1626 if ($gconfig{'db_sizefile'}) {
1627 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1629 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";
1632 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1634 Returns HTML for a button that will popup a chooser window of some kind. The
1637 =item url - Base URL of the popup window's contents
1639 =item width - Width of the window in pixels
1641 =item height - Height in pixels
1643 =item scrollbars - Set to 1 if the window should have scrollbars
1645 The field-mappings parameter is an array ref of array refs containing
1647 =item - Attribute to assign field to in the popup window
1649 =item - Form field name
1651 =item - CGI parameter to URL for value, if any
1654 sub popup_window_button
1656 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1657 my ($url, $w, $h, $scroll, $fields) = @_;
1658 my $scrollyn = $scroll ? "yes" : "no";
1659 my $rv = "<input type=button onClick='";
1660 foreach my $m (@$fields) {
1661 $rv .= "$m->[0] = form.$m->[1]; ";
1663 my $sep = $url =~ /\?/ ? "&" : "?";
1664 $rv .= "chooser = window.open(\"$url\"";
1665 foreach my $m (@$fields) {
1667 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1671 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1672 foreach my $m (@$fields) {
1673 $rv .= "chooser.$m->[0] = $m->[0]; ";
1674 $rv .= "window.$m->[0] = $m->[0]; ";
1676 $rv .= "' value=\"...\">";
1680 =head2 read_acl(&user-module-hash, &user-list-hash)
1682 Reads the Webmin acl file into the given hash references. The first is indexed
1683 by a combined key of username,module , with the value being set to 1 when
1684 the user has access to that module. The second is indexed by username, with
1685 the value being an array ref of allowed modules.
1687 This function is deprecated in favour of foreign_available, which performs a
1688 more comprehensive check of module availability.
1693 if (!%main::acl_hash_cache) {
1695 open(ACL, &acl_filename());
1697 if (/^([^:]+):\s*(.*)/) {
1699 my @mods = split(/\s+/, $2);
1700 foreach my $m (@mods) {
1701 $main::acl_hash_cache{$user,$m}++;
1703 $main::acl_array_cache{$user} = \@mods;
1708 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1709 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1714 Returns the file containing the webmin ACL, which is usually
1715 /etc/webmin/webmin.acl.
1720 return "$config_directory/webmin.acl";
1725 Does nothing, but kept around for compatability.
1732 =head2 get_miniserv_config(&hash)
1734 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1735 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1739 sub get_miniserv_config
1741 return &read_file_cached(
1742 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1745 =head2 put_miniserv_config(&hash)
1747 Writes out the Webmin webserver configuration file from the contents of
1748 the given hash ref. This should be initially populated by get_miniserv_config,
1751 get_miniserv_config(\%miniserv);
1752 $miniserv{'port'} = 10005;
1753 put_miniserv_config(\%miniserv);
1757 sub put_miniserv_config
1759 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1763 =head2 restart_miniserv([nowait])
1765 Kill the old miniserv process and re-start it, then optionally waits for
1766 it to restart. This will apply all configuration settings.
1769 sub restart_miniserv
1772 return undef if (&is_readonly_mode());
1774 &get_miniserv_config(\%miniserv) || return;
1777 if ($gconfig{'os_type'} ne 'windows') {
1778 # On Unix systems, we can restart with a signal
1779 my ($pid, $addr, $i);
1780 $miniserv{'inetd'} && return;
1781 my @oldst = stat($miniserv{'pidfile'});
1782 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1785 if (!$pid) { &error("Invalid PID file"); }
1787 # Just signal miniserv to restart
1788 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1790 # Wait till new PID is written, indicating a restart
1791 for($i=0; $i<60; $i++) {
1793 my @newst = stat($miniserv{'pidfile'});
1794 last if ($newst[9] != $oldst[9]);
1796 $i < 60 || &error("Webmin server did not write new PID file");
1798 ## Totally kill the process and re-run it
1799 #$SIG{'TERM'} = 'IGNORE';
1800 #&kill_logged('TERM', $pid);
1801 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1804 # On Windows, we need to use the flag file
1805 open(TOUCH, ">$miniserv{'restartflag'}");
1810 # wait for miniserv to come back up
1811 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1813 for($i=0; $i<20; $i++) {
1815 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1816 my $rv = connect(STEST,
1817 pack_sockaddr_in($miniserv{'port'}, $addr));
1819 last if ($rv && ++$ok >= 2);
1821 $i < 20 || &error("Failed to restart Webmin server!");
1825 =head2 reload_miniserv
1827 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1828 configuration files. Not all changes will be applied though, such as the
1829 IP addresses and ports to accept connections on.
1834 return undef if (&is_readonly_mode());
1836 &get_miniserv_config(\%miniserv) || return;
1838 if ($gconfig{'os_type'} ne 'windows') {
1839 # Send a USR1 signal to re-read the config
1840 my ($pid, $addr, $i);
1841 $miniserv{'inetd'} && return;
1842 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1845 if (!$pid) { &error("Invalid PID file"); }
1846 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1848 # Make sure this didn't kill Webmin!
1850 if (!kill(0, $pid)) {
1851 print STDERR "USR1 signal killed Webmin - restarting\n";
1852 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1856 # On Windows, we need to use the flag file
1857 open(TOUCH, ">$miniserv{'reloadflag'}");
1862 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1864 Returns 1 if some module is supported on the current operating system, or the
1865 OS supplies as parameters. The parameters are :
1867 =item minfo - A hash ref of module information, as returned by get_module_info
1869 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1871 =item os-version - The Webmin OS version to use, such as 13.0
1873 =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.
1876 sub check_os_support
1878 my $oss = $_[0]->{'os_support'};
1879 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1880 # May provide usable API
1881 $oss .= " ".$_[0]->{'api_os_support'};
1883 if ($_[0]->{'nozone'} && &running_in_zone()) {
1884 # Not supported in a Solaris Zone
1887 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1888 # Not supported in a Linux Vserver
1891 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1892 # Not supported in an OpenVZ container
1895 return 1 if (!$oss || $oss eq '*');
1896 my $osver = $_[2] || $gconfig{'os_version'};
1897 my $ostype = $_[1] || $gconfig{'os_type'};
1900 my ($os, $ver, $codes);
1901 my ($neg) = ($oss =~ s/^!//); # starts with !
1902 $anyneg++ if ($neg);
1903 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1905 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1907 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1909 $os = $1; $ver = $2; $oss = $3;
1911 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1913 $os = $1; $codes = $2; $oss = $3;
1915 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1917 $codes = $1; $oss = $2;
1919 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1921 $os = $1; $oss = $2;
1924 next if ($os && !($os eq $ostype ||
1925 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1926 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1927 next if ($osver < $1 || $osver > $2);
1929 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1930 next if ($osver < $1);
1932 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1933 next if ($osver > $1);
1936 next if ($ver ne $osver);
1938 next if ($codes && !eval $codes);
1944 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1946 Downloads data from a HTTP url to a local file or string. The parameters are :
1948 =item host - The hostname part of the URL, such as www.google.com
1950 =item port - The HTTP port number, such as 80
1952 =item page - The filename part of the URL, like /index.html
1954 =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.
1956 =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.
1958 =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.
1960 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
1962 =item user - If set, HTTP authentication is done with this username.
1964 =item pass - The HTTP password to use with the username above.
1966 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
1968 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
1970 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
1972 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
1977 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
1978 $timeout, $osdn, $nocache, $headers) = @_;
1979 if ($gconfig{'debug_what_net'}) {
1980 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
1981 ($user ? " user=$user pass=$pass" : "").
1982 (ref($dest) ? "" : " dest=$dest"));
1985 # Convert OSDN URL first
1986 my $prot = $ssl ? "https://" : "http://";
1987 my $portstr = $ssl && $port == 443 ||
1988 !$ssl && $port == 80 ? "" : ":$port";
1989 ($host, $port, $page, $ssl) = &parse_http_url(
1990 &convert_osdn_url($prot.$host.$portstr.$page));
1993 # Check if we already have cached the URL
1994 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
1995 my $cfile = &check_in_http_cache($url);
1996 if ($cfile && !$nocache) {
1997 # Yes! Copy to dest file or variable
1998 &$cbfunc(6, $url) if ($cbfunc);
2000 &open_readfile(CACHEFILE, $cfile);
2002 $$dest = <CACHEFILE>;
2006 ©_source_dest($cfile, $dest);
2013 push(@headers, [ "Host", $host ]);
2014 push(@headers, [ "User-agent", "Webmin" ]);
2015 push(@headers, [ "Accept-language", "en" ]);
2017 my $auth = &encode_base64("$user:$pass");
2018 $auth =~ tr/\r\n//d;
2019 push(@headers, [ "Authorization", "Basic $auth" ]);
2021 foreach my $hname (keys %$headers) {
2022 push(@headers, [ $hname, $headers->{$hname} ]);
2025 # Actually download it
2026 $main::download_timed_out = undef;
2027 local $SIG{ALRM} = \&download_timeout;
2028 alarm($timeout || 60);
2029 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2031 $h = $main::download_timed_out if ($main::download_timed_out);
2033 if ($error) { $$error = $h; return; }
2034 else { &error($h); }
2036 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2037 $headers, $ssl, $nocache);
2038 if ((!$error || !$$error) && !$nocache) {
2039 &write_to_http_cache($url, $dest);
2043 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2045 Do a HTTP download, after the headers have been sent. For internal use only,
2046 typically called by http_download.
2049 sub complete_http_download
2051 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2057 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2058 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2060 if ($_[2]) { ${$_[2]} = $line; return; }
2061 else { &error("Download failed : $line"); }
2064 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2067 $line = &read_http_connection($_[0]);
2068 $line =~ tr/\r\n//d;
2069 $line =~ /^(\S+):\s+(.*)$/ || last;
2070 $header{lc($1)} = $2;
2071 push(@headers, [ lc($1), $2 ]);
2074 if ($main::download_timed_out) {
2075 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2076 else { &error($main::download_timed_out); }
2078 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2079 if ($rcode >= 300 && $rcode < 400) {
2080 # follow the redirect
2081 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2082 my ($host, $port, $page, $ssl);
2083 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2084 $ssl = $1 eq 'https' ? 1 : 0;
2085 $host = $2; $port = $3; $page = $4 || "/";
2087 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2088 $ssl = $1 eq 'https' ? 1 : 0;
2089 $host = $2; $port = 80; $page = $3 || "/";
2091 elsif ($header{'location'} =~ /^\// && $_[5]) {
2092 # Relative to same server
2096 $page = $header{'location'};
2098 elsif ($header{'location'}) {
2099 # Assume relative to same dir .. not handled
2100 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2101 else { &error("Invalid Location header $header{'location'}"); }
2104 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2105 else { &error("Missing Location header"); }
2108 ($page, $params) = split(/\?/, $page);
2110 $page .= "?".$params if (defined($params));
2111 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2112 undef, undef, undef, $_[4], $_[9], $_[7]);
2117 # Append to a variable
2118 while(defined($buf = &read_http_connection($_[0], 1024))) {
2120 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2126 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2127 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2128 else { &error("Failed to write to $_[1] : $!"); }
2130 binmode(PFILE); # For windows
2131 while(defined($buf = &read_http_connection($_[0], 1024))) {
2132 &print_tempfile(PFILE, $buf);
2133 $got += length($buf);
2134 &$cbfunc(3, $got) if ($cbfunc);
2136 &close_tempfile(PFILE);
2137 if ($header{'content-length'} &&
2138 $got != $header{'content-length'}) {
2139 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2140 else { &error("Download incomplete"); }
2143 &$cbfunc(4) if ($cbfunc);
2145 &close_http_connection($_[0]);
2149 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2151 Download data from an FTP site to a local file. The parameters are :
2153 =item host - FTP server hostname
2155 =item file - File on the FTP server to download
2157 =item destfile - File on the Webmin system to download data to
2159 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2161 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2163 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2165 =item pass - Password for the username above.
2167 =item port - FTP server port number, which defaults to 21 if not set.
2172 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2174 if ($gconfig{'debug_what_net'}) {
2175 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2176 ($user ? " user=$user pass=$pass" : "").
2177 (ref($dest) ? "" : " dest=$dest"));
2181 if (&is_readonly_mode()) {
2182 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2184 else { &error("FTP connections not allowed in readonly mode"); }
2187 # Check if we already have cached the URL
2188 my $url = "ftp://".$host.$file;
2189 my $cfile = &check_in_http_cache($url);
2191 # Yes! Copy to dest file or variable
2192 &$cbfunc(6, $url) if ($cbfunc);
2194 &open_readfile(CACHEFILE, $cfile);
2196 $$dest = <CACHEFILE>;
2200 ©_source_dest($cfile, $dest);
2205 # Actually download it
2206 $main::download_timed_out = undef;
2207 local $SIG{ALRM} = \&download_timeout;
2210 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2211 # download through http-style proxy
2213 if (&open_socket($1, $2, "SOCK", \$error)) {
2215 if ($main::download_timed_out) {
2217 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2218 else { &error($main::download_timed_out); }
2220 my $esc = $_[1]; $esc =~ s/ /%20/g;
2221 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2222 my $portstr = $port == 21 ? "" : ":$port";
2223 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2224 print SOCK "User-agent: Webmin\r\n";
2225 if ($gconfig{'proxy_user'}) {
2226 my $auth = &encode_base64(
2227 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2228 $auth =~ tr/\r\n//d;
2229 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2232 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2235 elsif (!$gconfig{'proxy_fallback'}) {
2237 if ($error) { $$error = $main::download_timed_out; return 0; }
2238 else { &error($main::download_timed_out); }
2243 # connect to host and login with real FTP protocol
2244 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2246 if ($main::download_timed_out) {
2247 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2248 else { &error($main::download_timed_out); }
2250 &ftp_command("", 2, $_[3]) || return 0;
2252 # Login as supplied user
2253 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2255 if (int($urv[1]/100) == 3) {
2256 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2260 # Login as anonymous
2261 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2263 if (int($urv[1]/100) == 3) {
2264 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2268 &$cbfunc(1, 0) if ($cbfunc);
2271 # get the file size and tell the callback
2272 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2273 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2274 defined($size) || return 0;
2276 &$cbfunc(2, int($size));
2280 my $pasv = &ftp_command("PASV", 2, $_[3]);
2281 defined($pasv) || return 0;
2282 $pasv =~ /\(([0-9,]+)\)/;
2283 @n = split(/,/ , $1);
2284 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2285 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2286 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2290 &open_tempfile(PFILE, ">$_[2]", 1);
2291 while(read(CON, $buf, 1024) > 0) {
2292 &print_tempfile(PFILE, $buf);
2293 $got += length($buf);
2294 &$cbfunc(3, $got) if ($cbfunc);
2296 &close_tempfile(PFILE);
2298 if ($got != $size) {
2299 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2300 else { &error("Download incomplete"); }
2302 &$cbfunc(4) if ($cbfunc);
2304 &ftp_command("", 2, $_[3]) || return 0;
2308 &ftp_command("QUIT", 2, $_[3]) || return 0;
2312 &write_to_http_cache($url, $dest);
2316 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2318 Upload data from a local file to an FTP site. The parameters are :
2320 =item host - FTP server hostname
2322 =item file - File on the FTP server to write to
2324 =item srcfile - File on the Webmin system to upload data from
2326 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2328 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2330 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2332 =item pass - Password for the username above.
2334 =item port - FTP server port number, which defaults to 21 if not set.
2341 if (&is_readonly_mode()) {
2342 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2344 else { &error("FTP connections not allowed in readonly mode"); }
2347 $main::download_timed_out = undef;
2348 local $SIG{ALRM} = \&download_timeout;
2351 # connect to host and login
2352 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2354 if ($main::download_timed_out) {
2355 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2356 else { &error($main::download_timed_out); }
2358 &ftp_command("", 2, $_[3]) || return 0;
2360 # Login as supplied user
2361 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2363 if (int($urv[1]/100) == 3) {
2364 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2368 # Login as anonymous
2369 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2371 if (int($urv[1]/100) == 3) {
2372 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2376 &$cbfunc(1, 0) if ($cbfunc);
2378 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2380 # get the file size and tell the callback
2381 my @st = stat($_[2]);
2383 &$cbfunc(2, $st[7]);
2387 my $pasv = &ftp_command("PASV", 2, $_[3]);
2388 defined($pasv) || return 0;
2389 $pasv =~ /\(([0-9,]+)\)/;
2390 @n = split(/,/ , $1);
2391 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2392 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2397 while(read(PFILE, $buf, 1024) > 0) {
2399 $got += length($buf);
2400 &$cbfunc(3, $got) if ($cbfunc);
2404 if ($got != $st[7]) {
2405 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2406 else { &error("Upload incomplete"); }
2408 &$cbfunc(4) if ($cbfunc);
2411 &ftp_command("", 2, $_[3]) || return 0;
2412 &ftp_command("QUIT", 2, $_[3]) || return 0;
2418 =head2 no_proxy(host)
2420 Checks if some host is on the no proxy list. For internal use by the
2421 http_download and ftp_download functions.
2426 my $ip = &to_ipaddress($_[0]);
2427 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2428 return 1 if ($_[0] =~ /\Q$n\E/ ||
2434 =head2 open_socket(host, port, handle, [&error])
2436 Open a TCP connection to some host and port, using a file handle. The
2439 =item host - Hostname or IP address to connect to.
2441 =item port - TCP port number.
2443 =item handle - A file handle name to use for the connection.
2445 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2450 my ($host, $port, $fh, $err) = @_;
2451 $fh = &callers_package($fh);
2453 if ($gconfig{'debug_what_net'}) {
2454 &webmin_debug_log('TCP', "host=$host port=$port");
2456 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2457 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2458 else { &error("Failed to create socket : $!"); }
2461 if (!($addr = inet_aton($host))) {
2462 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2463 else { &error("Failed to lookup IP address for $host"); }
2465 if ($gconfig{'bind_proxy'}) {
2466 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2467 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2468 else { &error("Failed to bind to source address : $!"); }
2471 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2472 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2473 else { &error("Failed to connect to $host:$port : $!"); }
2475 my $old = select($fh); $| =1; select($old);
2479 =head2 download_timeout
2481 Called when a download times out. For internal use only.
2484 sub download_timeout
2486 $main::download_timed_out = "Download timed out";
2489 =head2 ftp_command(command, expected, [&error], [filehandle])
2491 Send an FTP command, and die if the reply is not what was expected. Mainly
2492 for internal use by the ftp_download and ftp_upload functions.
2497 my ($cmd, $expect, $err, $fh) = @_;
2499 $fh = &callers_package($fh);
2502 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2504 print $fh "$cmd\r\n";
2507 if (!($line = <$fh>)) {
2509 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2510 else { &error("Failed to read reply to $what"); }
2512 $line =~ /^(...)(.)(.*)$/;
2515 foreach my $c (@$expect) {
2516 $found++ if (int($1/100) == $c);
2520 $found++ if (int($1/100) == $_[1]);
2524 if ($err) { $$err = "$what failed : $3"; return undef; }
2525 else { &error("$what failed : $3"); }
2530 # Need to skip extra stuff..
2532 if (!($line = <$fh>)) {
2534 if ($$err) { $$err = "Failed to read reply to $what";
2536 else { &error("Failed to read reply to $what"); }
2538 $line =~ /^(....)(.*)$/; $reply .= $2;
2539 if ($1 eq "$rcode ") { last; }
2543 return wantarray ? ($reply, $rcode) : $reply;
2546 =head2 to_ipaddress(hostname)
2548 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2549 it cannot be resolved.
2554 if (&check_ipaddress($_[0])) {
2558 my $hn = gethostbyname($_[0]);
2559 return undef if (!$hn);
2560 local @ip = unpack("CCCC", $hn);
2561 return join("." , @ip);
2565 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2567 Renders a 4-column table of icons. The useful parameters are :
2569 =item links - An array ref of link destination URLs for the icons.
2571 =item titles - An array ref of titles to appear under the icons.
2573 =item icons - An array ref of URLs for icon images.
2575 =item columns - Number of columns to layout the icons with. Defaults to 4.
2580 &load_theme_library();
2581 if (defined(&theme_icons_table)) {
2582 &theme_icons_table(@_);
2586 my $cols = $_[3] ? $_[3] : 4;
2587 my $per = int(100.0 / $cols);
2588 print "<table class='icons_table' width=100% cellpadding=5>\n";
2589 for(my $i=0; $i<@{$_[0]}; $i++) {
2590 if ($i%$cols == 0) { print "<tr>\n"; }
2591 print "<td width=$per% align=center valign=top>\n";
2592 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2593 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2594 $_[7]->[$i], $_[8]->[$i]);
2596 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2598 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2599 print "</tr>\n" if ($need_tr);
2603 =head2 replace_file_line(file, line, [newline]*)
2605 Replaces one line in some file with 0 or more new lines. The parameters are :
2607 =item file - Full path to some file, like /etc/hosts.
2609 =item line - Line number to replace, starting from 0.
2611 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2614 sub replace_file_line
2617 my $realfile = &translate_filename($_[0]);
2618 open(FILE, $realfile);
2621 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2622 else { splice(@lines, $_[1], 1); }
2623 &open_tempfile(FILE, ">$realfile");
2624 &print_tempfile(FILE, @lines);
2625 &close_tempfile(FILE);
2628 =head2 read_file_lines(file, [readonly])
2630 Returns a reference to an array containing the lines from some file. This
2631 array can be modified, and will be written out when flush_file_lines()
2632 is called. The parameters are :
2634 =item file - Full path to the file to read.
2636 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2640 $lref = read_file_lines("/etc/hosts");
2641 push(@$lref, "127.0.0.1 localhost");
2642 flush_file_lines("/etc/hosts");
2648 my ($package, $filename, $line) = caller;
2649 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2651 my $realfile = &translate_filename($_[0]);
2652 if (!$main::file_cache{$realfile}) {
2655 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2656 open(READFILE, $realfile);
2659 $eol = /\r\n$/ ? "\r\n" : "\n";
2665 $main::file_cache{$realfile} = \@lines;
2666 $main::file_cache_noflush{$realfile} = $_[1];
2667 $main::file_cache_eol{$realfile} = $eol || "\n";
2670 # Make read-write if currently readonly
2672 $main::file_cache_noflush{$realfile} = 0;
2675 return $main::file_cache{$realfile};
2678 =head2 flush_file_lines([file], [eol])
2680 Write out to a file previously read by read_file_lines to disk (except
2681 for those marked readonly). The parameters are :
2683 =item file - The file to flush out.
2685 =item eof - End-of-line character for each line. Defaults to \n.
2688 sub flush_file_lines
2692 local $trans = &translate_filename($_[0]);
2693 $main::file_cache{$trans} ||
2694 &error("flush_file_lines called on non-loaded file $trans");
2695 push(@files, $trans);
2698 @files = ( keys %main::file_cache );
2700 foreach my $f (@files) {
2701 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2702 if (!$main::file_cache_noflush{$f}) {
2703 no warnings; # XXX Bareword file handles should go away
2704 &open_tempfile(FLUSHFILE, ">$f");
2705 foreach my $line (@{$main::file_cache{$f}}) {
2706 (print FLUSHFILE $line,$eol) ||
2707 &error(&text("efilewrite", $f, $!));
2709 &close_tempfile(FLUSHFILE);
2711 delete($main::file_cache{$f});
2712 delete($main::file_cache_noflush{$f});
2716 =head2 unflush_file_lines(file)
2718 Clear the internal cache of some given file, previously read by read_file_lines.
2721 sub unflush_file_lines
2723 my $realfile = &translate_filename($_[0]);
2724 delete($main::file_cache{$realfile});
2725 delete($main::file_cache_noflush{$realfile});
2728 =head2 unix_user_input(fieldname, user, [form])
2730 Returns HTML for an input to select a Unix user. By default this is a text
2731 box with a user popup button next to it.
2736 if (defined(&theme_unix_user_input)) {
2737 return &theme_unix_user_input(@_);
2739 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2740 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2743 =head2 unix_group_input(fieldname, user, [form])
2745 Returns HTML for an input to select a Unix group. By default this is a text
2746 box with a group popup button next to it.
2749 sub unix_group_input
2751 if (defined(&theme_unix_group_input)) {
2752 return &theme_unix_group_input(@_);
2754 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2755 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2758 =head2 hlink(text, page, [module], [width], [height])
2760 Returns HTML for a link that when clicked on pops up a window for a Webmin
2761 help page. The parameters are :
2763 =item text - Text for the link.
2765 =item page - Help page code, such as 'intro'.
2767 =item module - Module the help page is in. Defaults to the current module.
2769 =item width - Width of the help popup window. Defaults to 600 pixels.
2771 =item height - Height of the help popup window. Defaults to 400 pixels.
2773 The actual help pages are in each module's help sub-directory, in files with
2779 if (defined(&theme_hlink)) {
2780 return &theme_hlink(@_);
2782 my $mod = $_[2] ? $_[2] : &get_module_name();
2783 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2784 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2785 return "<a onClick='window.open(\"$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>";
2788 =head2 user_chooser_button(field, multiple, [form])
2790 Returns HTML for a javascript button for choosing a Unix user or users.
2791 The parameters are :
2793 =item field - Name of the HTML field to place the username into.
2795 =item multiple - Set to 1 if multiple users can be selected.
2797 =item form - Index of the form on the page.
2800 sub user_chooser_button
2802 return undef if (!&supports_users());
2803 return &theme_user_chooser_button(@_)
2804 if (defined(&theme_user_chooser_button));
2805 my $form = defined($_[2]) ? $_[2] : 0;
2806 my $w = $_[1] ? 500 : 300;
2808 if ($_[1] && $gconfig{'db_sizeusers'}) {
2809 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2811 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2812 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2814 return "<input type=button onClick='ifield = form.$_[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";
2817 =head2 group_chooser_button(field, multiple, [form])
2819 Returns HTML for a javascript button for choosing a Unix group or groups
2820 The parameters are :
2822 =item field - Name of the HTML field to place the group name into.
2824 =item multiple - Set to 1 if multiple groups can be selected.
2826 =item form - Index of the form on the page.
2829 sub group_chooser_button
2831 return undef if (!&supports_users());
2832 return &theme_group_chooser_button(@_)
2833 if (defined(&theme_group_chooser_button));
2834 my $form = defined($_[2]) ? $_[2] : 0;
2835 my $w = $_[1] ? 500 : 300;
2837 if ($_[1] && $gconfig{'db_sizeusers'}) {
2838 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2840 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2841 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2843 return "<input type=button onClick='ifield = form.$_[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";
2846 =head2 foreign_check(module, [api-only])
2848 Checks if some other module exists and is supported on this OS. The parameters
2851 =item module - Name of the module to check.
2853 =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.
2858 my ($mod, $api) = @_;
2860 my $mdir = &module_root_directory($mod);
2861 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2862 return &check_os_support(\%minfo, undef, undef, $api);
2865 =head2 foreign_exists(module)
2867 Checks if some other module exists. The module parameter is the short module
2873 my $mdir = &module_root_directory($_[0]);
2874 return -r "$mdir/module.info";
2877 =head2 foreign_available(module)
2879 Returns 1 if some module is installed, and acessible to the current user. The
2880 module parameter is the module directory name.
2883 sub foreign_available
2885 return 0 if (!&foreign_check($_[0]) &&
2886 !$gconfig{'available_even_if_no_support'});
2887 my %foreign_module_info = &get_module_info($_[0]);
2889 # Check list of allowed modules
2891 &read_acl(\%acl, undef);
2892 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2893 !$acl{$base_remote_user,'*'});
2895 # Check for usermod restrictions
2896 my @usermods = &list_usermods();
2897 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2899 if (&get_product_name() eq "webmin") {
2900 # Check if the user has any RBAC privileges in this module
2901 if (&supports_rbac($_[0]) &&
2902 &use_rbac_module_acl(undef, $_[0])) {
2903 # RBAC is enabled for this user and module - check if he
2905 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2906 return 0 if (!$rbacs);
2908 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2909 # If denying access to modules not specifically allowed by
2910 # RBAC, then prevent access
2915 # Check readonly support
2916 if (&is_readonly_mode()) {
2917 return 0 if (!$foreign_module_info{'readonly'});
2920 # Check if theme vetos
2921 if (defined(&theme_foreign_available)) {
2922 return 0 if (!&theme_foreign_available($_[0]));
2925 # Check if licence module vetos
2926 if ($main::licence_module) {
2927 return 0 if (!&foreign_call($main::licence_module,
2928 "check_module_licence", $_[0]));
2934 =head2 foreign_require(module, [file], [package])
2936 Brings in functions from another module, and places them in the Perl namespace
2937 with the same name as the module. The parameters are :
2939 =item module - The source module's directory name, like sendmail.
2941 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2943 =item package - Perl package to place the module's functions and global variables in.
2945 If the original module name contains dashes, they will be replaced with _ in
2951 my ($mod, $file, $pkg) = @_;
2952 $pkg ||= $mod || "global";
2953 $pkg =~ s/[^A-Za-z0-9]/_/g;
2956 push(@files, $file);
2960 my %minfo = &get_module_info($mod);
2961 if ($minfo{'library'}) {
2962 @files = split(/\s+/, $minfo{'library'});
2965 @files = ( $mod."-lib.pl" );
2968 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
2969 return 1 if (!@files);
2970 foreach my $f (@files) {
2971 $main::done_foreign_require{$pkg,$f}++;
2974 my $mdir = &module_root_directory($mod);
2975 @INC = &unique($mdir, @INC);
2976 -d $mdir || &error("Module $mod does not exist");
2977 if (!&get_module_name() && $mod) {
2980 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
2981 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
2982 my $code = "package $pkg; ".
2983 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
2984 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
2985 foreach my $f (@files) {
2986 $code .= "do '$mdir/$f' || die \$@; ";
2989 if (defined($old_fmn)) {
2990 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
2993 delete($ENV{'FOREIGN_MODULE_NAME'});
2995 if (defined($old_frd)) {
2996 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
2999 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3002 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3006 =head2 foreign_call(module, function, [arg]*)
3008 Call a function in another module. The module parameter is the target module
3009 directory name, function is the perl sub to call, and the remaining parameters
3010 are the arguments. However, unless you need to call a function whose name
3011 is dynamic, it is better to use Perl's cross-module function call syntax
3012 like module::function(args).
3017 my $pkg = $_[0] || "global";
3018 $pkg =~ s/[^A-Za-z0-9]/_/g;
3019 my @args = @_[2 .. @_-1];
3020 $main::foreign_args = \@args;
3021 my @rv = eval <<EOF;
3023 &$_[1](\@{\$main::foreign_args});
3025 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3026 return wantarray ? @rv : $rv[0];
3029 =head2 foreign_config(module, [user-config])
3031 Get the configuration from another module, and return it as a hash. If the
3032 user-config parameter is set to 1, returns the Usermin user-level preferences
3033 for the current user instead.
3038 my ($mod, $uc) = @_;
3041 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3042 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3043 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3046 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3051 =head2 foreign_installed(module, mode)
3053 Checks if the server for some module is installed, and possibly also checks
3054 if the module has been configured by Webmin.
3055 For mode 1, returns 2 if the server is installed and configured for use by
3056 Webmin, 1 if installed but not configured, or 0 otherwise.
3057 For mode 0, returns 1 if installed, 0 if not.
3058 If the module does not provide an install_check.pl script, assumes that
3059 the server is installed.
3062 sub foreign_installed
3064 my ($mod, $configured) = @_;
3065 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3067 return $main::foreign_installed_cache{$mod,$configured};
3071 if (!&foreign_check($mod)) {
3076 my $mdir = &module_root_directory($mod);
3077 if (!-r "$mdir/install_check.pl") {
3078 # Not known, assume OK
3079 $rv = $configured ? 2 : 1;
3082 # Call function to check
3083 &foreign_require($mod, "install_check.pl");
3084 $rv = &foreign_call($mod, "is_installed", $configured);
3087 $main::foreign_installed_cache{$mod,$configured} = $rv;
3092 =head2 foreign_defined(module, function)
3094 Returns 1 if some function is defined in another module. In general, it is
3095 simpler to use the syntax &defined(module::function) instead.
3101 $pkg =~ s/[^A-Za-z0-9]/_/g;
3102 my $func = "${pkg}::$_[1]";
3103 return defined(&$func);
3106 =head2 get_system_hostname([short])
3108 Returns the hostname of this system. If the short parameter is set to 1,
3109 then the domain name is not prepended - otherwise, Webmin will attempt to get
3110 the fully qualified hostname, like foo.example.com.
3113 sub get_system_hostname
3116 if (!$main::get_system_hostname[$m]) {
3117 if ($gconfig{'os_type'} ne 'windows') {
3118 # Try some common Linux hostname files first
3120 if ($gconfig{'os_type'} eq 'redhat-linux') {
3122 &read_env_file("/etc/sysconfig/network", \%nc);
3123 if ($nc{'HOSTNAME'}) {
3124 $fromfile = $nc{'HOSTNAME'};
3127 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3128 my $hn = &read_file_contents("/etc/hostname");
3134 elsif ($gconfig{'os_type'} eq 'open-linux') {
3135 my $hn = &read_file_contents("/etc/HOSTNAME");
3141 elsif ($gconfig{'os_type'} eq 'solaris') {
3142 my $hn = &read_file_contents("/etc/nodename");
3149 # If we found a hostname, use it if value
3150 if ($fromfile && ($m || $fromfile =~ /\./)) {
3152 $fromfile =~ s/\..*$//;
3154 $main::get_system_hostname[$m] = $fromfile;
3158 # Can use hostname command on Unix
3159 &execute_command("hostname", undef,
3160 \$main::get_system_hostname[$m], undef, 0, 1);
3161 chop($main::get_system_hostname[$m]);
3163 eval "use Sys::Hostname";
3165 $main::get_system_hostname[$m] = eval "hostname()";
3167 if ($@ || !$main::get_system_hostname[$m]) {
3168 $main::get_system_hostname[$m] = "UNKNOWN";
3171 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3172 $gconfig{'os_type'} =~ /linux$/ &&
3173 !$gconfig{'no_hostname_f'} && !$_[0]) {
3174 # Try with -f flag to get fully qualified name
3176 my $ex = &execute_command("hostname -f", undef, \$flag,
3179 if ($ex || $flag eq "") {
3180 # -f not supported! We have probably set the
3181 # hostname to just '-f'. Fix the problem
3184 &execute_command("hostname ".
3185 quotemeta($main::get_system_hostname[$m]),
3186 undef, undef, undef, 0, 1);
3190 $main::get_system_hostname[$m] = $flag;
3195 # On Windows, try computername environment variable
3196 return $ENV{'computername'} if ($ENV{'computername'});
3197 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3199 # Fall back to net name command
3200 my $out = `net name 2>&1`;
3201 if ($out =~ /\-+\r?\n(\S+)/) {
3202 $main::get_system_hostname[$m] = $1;
3205 $main::get_system_hostname[$m] = "windows";
3209 return $main::get_system_hostname[$m];
3212 =head2 get_webmin_version
3214 Returns the version of Webmin currently being run, such as 1.450.
3217 sub get_webmin_version
3219 if (!$get_webmin_version) {
3220 open(VERSION, "$root_directory/version") || return 0;
3221 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3224 return $get_webmin_version;
3227 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3229 Returns a hash containing access control options for the given user and module.
3230 By default the current username and module name are used. If the no-rbac flag
3231 is given, the permissions will not be updated based on the user's RBAC role
3232 (as seen on Solaris). If the no-default flag is given, default permissions for
3233 the module will not be included.
3238 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3239 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3240 my $mdir = &module_root_directory($m);
3243 # Read default ACL first, to be overridden by per-user settings
3244 &read_file_cached("$mdir/defaultacl", \%rv);
3246 # If this isn't a master admin user, apply the negative permissions
3247 # so that he doesn't un-expectedly gain access to new features
3249 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3250 if ($gaccess{'negative'}) {
3251 &read_file_cached("$mdir/negativeacl", \%rv);
3255 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3256 # RBAC overrides exist for this user in this module
3257 my $rbac = &get_rbac_module_acl(
3258 defined($_[0]) ? $_[0] : $remote_user, $m);
3259 foreach my $r (keys %$rbac) {
3260 $rv{$r} = $rbac->{$r};
3263 elsif ($gconfig{"risk_$u"} && $m) {
3264 # ACL is defined by user's risk level
3265 my $rf = $gconfig{"risk_$u"}.'.risk';
3266 &read_file_cached("$mdir/$rf", \%rv);
3268 my $sf = $gconfig{"skill_$u"}.'.skill';
3269 &read_file_cached("$mdir/$sf", \%rv);
3272 # Use normal Webmin ACL, if a user is set
3273 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3274 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3275 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3278 if ($tconfig{'preload_functions'}) {
3279 &load_theme_library();
3281 if (defined(&theme_get_module_acl)) {
3282 %rv = &theme_get_module_acl($u, $m, \%rv);
3287 =head2 get_group_module_acl(group, [module])
3289 Returns the ACL for a Webmin group, in an optional module (which defaults to
3290 the current module).
3293 sub get_group_module_acl
3296 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3297 my $mdir = &module_root_directory($m);
3299 &read_file_cached("$mdir/defaultacl", \%rv);
3300 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3301 if (defined(&theme_get_module_acl)) {
3302 %rv = &theme_get_module_acl($g, $m, \%rv);
3307 =head2 save_module_acl(&acl, [user], [module])
3309 Updates the acl hash for some user and module. The parameters are :
3311 =item acl - Hash reference for the new access control options.
3313 =item user - User to update, defaulting to the current user.
3315 =item module - Module to update, defaulting to the caller.
3320 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3321 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3322 if (&foreign_check("acl")) {
3323 # Check if this user is a member of a group, and if he gets the
3324 # module from a group. If so, update its ACL as well
3325 &foreign_require("acl", "acl-lib.pl");
3327 foreach my $g (&acl::list_groups()) {
3328 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3329 &indexof($m, @{$g->{'modules'}}) >= 0) {
3335 &save_group_module_acl($_[0], $group->{'name'}, $m);
3338 if (!-d "$config_directory/$m") {
3339 mkdir("$config_directory/$m", 0755);
3341 &write_file("$config_directory/$m/$u.acl", $_[0]);
3344 =head2 save_group_module_acl(&acl, group, [module])
3346 Updates the acl hash for some group and module. The parameters are :
3348 =item acl - Hash reference for the new access control options.
3350 =item group - Group name to update.
3352 =item module - Module to update, defaulting to the caller.
3355 sub save_group_module_acl
3358 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3359 if (&foreign_check("acl")) {
3360 # Check if this group is a member of a group, and if it gets the
3361 # module from a group. If so, update the parent ACL as well
3362 &foreign_require("acl", "acl-lib.pl");
3364 foreach my $pg (&acl::list_groups()) {
3365 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3366 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3372 &save_group_module_acl($_[0], $group->{'name'}, $m);
3375 if (!-d "$config_directory/$m") {
3376 mkdir("$config_directory/$m", 0755);
3378 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3383 This function must be called by all Webmin CGI scripts, either directly or
3384 indirectly via a per-module lib.pl file. It performs a number of initialization
3385 and housekeeping tasks, such as working out the module name, checking that the
3386 current user has access to the module, and populating global variables. Some
3387 of the variables set include :
3389 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3391 =item $var_directory - Base logs directory, typically /var/webmin
3393 =item %config - Per-module configuration.
3395 =item %gconfig - Global configuration.
3397 =item $scriptname - Base name of the current perl script.
3399 =item $module_name - The name of the current module.
3401 =item $module_config_directory - The config directory for this module.
3403 =item $module_config_file - The config file for this module.
3405 =item $module_root_directory - This module's code directory.
3407 =item $webmin_logfile - The detailed logfile for webmin.
3409 =item $remote_user - The actual username used to login to webmin.
3411 =item $base_remote_user - The username whose permissions are in effect.
3413 =item $current_theme - The theme currently in use.
3415 =item $root_directory - The first root directory of this webmin install.
3417 =item @root_directories - All root directories for this webmin install.
3422 # Record first process ID that called this, so we know when it exited to clean
3424 $main::initial_process_id ||= $$;
3426 # Configuration and spool directories
3427 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3428 die "WEBMIN_CONFIG not set";
3430 $config_directory = $ENV{'WEBMIN_CONFIG'};
3431 if (!defined($ENV{'WEBMIN_VAR'})) {
3432 open(VARPATH, "$config_directory/var-path");
3433 chop($var_directory = <VARPATH>);
3437 $var_directory = $ENV{'WEBMIN_VAR'};
3439 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3440 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3442 if ($ENV{'SESSION_ID'}) {
3443 # Hide this variable from called programs, but keep it for internal use
3444 $main::session_id = $ENV{'SESSION_ID'};
3445 delete($ENV{'SESSION_ID'});
3447 if ($ENV{'REMOTE_PASS'}) {
3448 # Hide the password too
3449 $main::remote_pass = $ENV{'REMOTE_PASS'};
3450 delete($ENV{'REMOTE_PASS'});
3453 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3454 # Looks like we are running setuid, but the real UID hasn't been set.
3455 # Do so now, so that executed programs don't get confused
3460 # Read the webmin global config file. This contains the OS type and version,
3461 # OS specific configuration and global options such as proxy servers
3462 $config_file = "$config_directory/config";
3464 &read_file_cached($config_file, \%gconfig);
3465 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3466 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3468 # If debugging is enabled, open the debug log
3469 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3470 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3471 if ($gconfig{'debug_size'}) {
3472 my @st = stat($dlog);
3473 if ($st[7] > $gconfig{'debug_size'}) {
3474 rename($dlog, $dlog.".0");
3477 open(main::DEBUGLOG, ">>$dlog");
3478 $main::opened_debug_log = 1;
3480 if ($gconfig{'debug_what_start'}) {
3481 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3482 $main::debug_log_start_time = time();
3483 &webmin_debug_log("START", "script=$script_name");
3484 $main::debug_log_start_module = $module_name;
3488 # Set PATH and LD_LIBRARY_PATH
3489 if ($gconfig{'path'}) {
3490 if ($gconfig{'syspath'}) {
3492 $ENV{'PATH'} = $gconfig{'path'};
3496 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3499 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3501 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3502 if ($gconfig{'http_proxy'}) {
3503 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3505 if ($gconfig{'ftp_proxy'}) {
3506 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3508 if ($gconfig{'noproxy'}) {
3509 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3512 # Find all root directories
3514 if (&get_miniserv_config(\%miniserv)) {
3515 @root_directories = ( $miniserv{'root'} );
3516 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3517 push(@root_directories, $miniserv{"extraroot_$i"});
3521 # Work out which module we are in, and read the per-module config file
3522 $0 =~ s/\\/\//g; # Force consistent path on Windows
3523 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3524 # In a foreign call - use the module name given
3525 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3526 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3527 @root_directories = ( $root_directory ) if (!@root_directories);
3529 elsif ($ENV{'SCRIPT_NAME'}) {
3530 my $sn = $ENV{'SCRIPT_NAME'};
3531 $sn =~ s/^$gconfig{'webprefix'}//
3532 if (!$gconfig{'webprefixnoredir'});
3533 if ($sn =~ /^\/([^\/]+)\//) {
3534 # Get module name from CGI path
3537 if ($ENV{'SERVER_ROOT'}) {
3538 $root_directory = $ENV{'SERVER_ROOT'};
3540 elsif ($ENV{'SCRIPT_FILENAME'}) {
3541 $root_directory = $ENV{'SCRIPT_FILENAME'};
3542 $root_directory =~ s/$sn$//;
3544 @root_directories = ( $root_directory ) if (!@root_directories);
3547 # Get root directory from miniserv.conf, and deduce module name from $0
3548 $root_directory = $root_directories[0];
3550 foreach my $r (@root_directories) {
3551 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3552 # Under a module directory
3557 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3563 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3566 # Work out of this is a web, command line or cron job
3567 if (!$main::webmin_script_type) {
3568 if ($ENV{'SCRIPT_NAME'}) {
3570 $main::webmin_script_type = 'web';
3573 # Cron jobs have no TTY
3574 if ($gconfig{'os_type'} eq 'windows' ||
3575 open(DEVTTY, ">/dev/tty")) {
3576 $main::webmin_script_type = 'cmd';
3580 $main::webmin_script_type = 'cron';
3585 # Set the umask based on config
3586 if ($gconfig{'umask'} && !$main::umask_already++) {
3587 umask(oct($gconfig{'umask'}));
3590 # If this is a cron job or other background task, set the nice level
3591 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3593 if ($gconfig{'nice'}) {
3594 eval 'POSIX::nice($gconfig{\'nice\'});';
3597 # Set IO scheduling class and priority
3598 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3600 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3601 if ($gconfig{'sclass'} ne '');
3602 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3603 if ($gconfig{'sprio'} ne '');
3605 &execute_command("$cmd >/dev/null 2>&1");
3608 $main::nice_already++;
3611 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3612 $base_remote_user = $u;
3613 $remote_user = $ENV{'REMOTE_USER'};
3616 # Find and load the configuration file for this module
3617 my (@ruinfo, $rgroup);
3618 $module_config_directory = "$config_directory/$module_name";
3619 if (&get_product_name() eq "usermin" &&
3620 -r "$module_config_directory/config.$remote_user") {
3622 $module_config_file = "$module_config_directory/config.$remote_user";
3624 elsif (&get_product_name() eq "usermin" &&
3625 (@ruinfo = getpwnam($remote_user)) &&
3626 ($rgroup = getgrgid($ruinfo[3])) &&
3627 -r "$module_config_directory/config.\@$rgroup") {
3628 # Based on group name
3629 $module_config_file = "$module_config_directory/config.\@$rgroup";
3633 $module_config_file = "$module_config_directory/config";
3636 &read_file_cached($module_config_file, \%config);
3638 # Fix up windows-specific substitutions in values
3639 foreach my $k (keys %config) {
3640 if ($config{$k} =~ /\$\{systemroot\}/) {
3641 my $root = &get_windows_root();
3642 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3647 # Record the initial module
3648 $main::initial_module_name ||= $module_name;
3650 # Set some useful variables
3652 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3653 $gconfig{'mobile_theme'} :
3654 defined($gconfig{'theme_'.$remote_user}) ?
3655 $gconfig{'theme_'.$remote_user} :
3656 defined($gconfig{'theme_'.$base_remote_user}) ?
3657 $gconfig{'theme_'.$base_remote_user} :
3659 @current_themes = split(/\s+/, $current_themes);
3660 $current_theme = $current_themes[0];
3661 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3662 $theme_root_directory = $theme_root_directories[0];
3663 @theme_configs = ( );
3664 foreach my $troot (@theme_root_directories) {
3666 &read_file_cached("$troot/config", \%onetconfig);
3667 &read_file_cached("$troot/config", \%tconfig);
3668 push(@theme_configs, \%onetconfig);
3670 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3671 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3673 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3674 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3676 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3677 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3678 if ($tconfig{'preload_functions'}) {
3679 # Force load of theme functions right now, if requested
3680 &load_theme_library();
3682 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3683 # Load the theme's Webmin:: package classes
3684 do "$theme_root_directory/$tconfig{'oofunctions'}";
3689 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3690 : "$var_directory/webmin.log";
3692 # Load language strings into %text
3693 my @langs = &list_languages();
3695 if ($gconfig{'acceptlang'}) {
3696 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3697 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3699 $accepted_lang = $al->{'lang'};
3704 $current_lang = $force_lang ? $force_lang :
3705 $accepted_lang ? $accepted_lang :
3706 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3707 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3708 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3709 foreach my $l (@langs) {
3710 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3712 @lang_order_list = &unique($default_lang,
3713 split(/:/, $current_lang_info->{'fallback'}),
3715 %text = &load_language($module_name);
3716 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3718 # Get the %module_info for this module
3720 my ($mi) = grep { $_->{'dir'} eq $module_name }
3721 &get_all_module_infos(2);
3722 %module_info = %$mi;
3723 $module_root_directory = &module_root_directory($module_name);
3726 if ($module_name && !$main::no_acl_check &&
3727 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3728 # Check if the HTTP user can access this module
3729 if (!&foreign_available($module_name)) {
3730 if (!&foreign_check($module_name)) {
3731 &error(&text('emodulecheck',
3732 "<i>$module_info{'desc'}</i>"));
3735 &error(&text('emodule', "<i>$u</i>",
3736 "<i>$module_info{'desc'}</i>"));
3739 $main::no_acl_check++;
3742 # Check the Referer: header for nasty redirects
3743 my @referers = split(/\s+/, $gconfig{'referers'});
3745 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3748 my $http_host = $ENV{'HTTP_HOST'};
3749 $http_host =~ s/:\d+$//;
3750 my $unsafe_index = $unsafe_index_cgi ||
3751 &get_module_variable('$unsafe_index_cgi');
3753 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
3754 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3756 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3757 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3758 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3759 ($referer_site && $referer_site ne $http_host &&
3760 &indexof($referer_site, @referers) < 0 ||
3761 !$referer_site && $gconfig{'referers_none'}) &&
3762 !$trust_unknown_referers &&
3763 !&get_module_variable('$trust_unknown_referers')) {
3764 # Looks like a link from elsewhere .. show an error
3765 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3767 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3768 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3769 if ($referer_site) {
3771 print &text('referer_warn',
3772 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3774 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3775 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3778 # No referer info given
3779 print &text('referer_warn_unknown', $url),"<p>\n";
3780 print &text('referer_fix1u'),"<p>\n";
3781 print &text('referer_fix2u'),"<p>\n";
3785 &footer("/", $text{'index'});
3788 $main::no_referers_check++;
3789 $main::completed_referers_check++;
3791 # Call theme post-init
3792 if (defined(&theme_post_init_config)) {
3793 &theme_post_init_config(@_);
3796 # Record that we have done the calling library in this package
3797 my ($callpkg, $lib) = caller();
3799 $main::done_foreign_require{$callpkg,$lib} = 1;
3801 # If a licence checking is enabled, do it now
3802 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3803 &foreign_check($gconfig{'licence_module'}) &&
3804 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3805 my $oldpwd = &get_current_dir();
3806 $main::done_licence_module_check++;
3807 $main::licence_module = $gconfig{'licence_module'};
3808 &foreign_require($main::licence_module, "licence_check.pl");
3809 ($main::licence_status, $main::licence_message) =
3810 &foreign_call($main::licence_module, "check_licence");
3814 # Export global variables to caller
3815 if ($main::export_to_caller) {
3816 foreach my $v ('$config_file', '%gconfig', '$null_file',
3817 '$path_separator', '@root_directories',
3818 '$root_directory', '$module_name',
3819 '$base_remote_user', '$remote_user',
3820 '$module_config_directory', '$module_config_file',
3821 '%config', '@current_themes', '$current_theme',
3822 '@theme_root_directories', '$theme_root_directory',
3823 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3824 '$webmin_logfile', '$current_lang',
3825 '$current_lang_info', '@lang_order_list', '%text',
3826 '%module_info', '$module_root_directory') {
3827 my ($vt, $vn) = split('', $v, 2);
3828 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3835 =head2 load_language([module], [directory])
3837 Returns a hashtable mapping text codes to strings in the appropriate language,
3838 based on the $current_lang global variable, which is in turn set based on
3839 the Webmin user's selection. The optional module parameter tells the function
3840 which module to load strings for, and defaults to the calling module. The
3841 optional directory parameter can be used to load strings from a directory
3844 In regular module development you will never need to call this function
3845 directly, as init_config calls it for you, and places the module's strings
3846 into the %text hash.
3852 my $root = $root_directory;
3853 my $ol = $gconfig{'overlang'};
3854 my ($dir) = ($_[1] || "lang");
3856 # Read global lang files
3857 foreach my $o (@lang_order_list) {
3858 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3859 return () if (!$ok && $o eq $default_lang);
3862 foreach my $o (@lang_order_list) {
3863 &read_file_cached("$root/$ol/$o", \%text);
3866 &read_file_cached("$config_directory/custom-lang", \%text);
3869 # Read module's lang files
3870 my $mdir = &module_root_directory($_[0]);
3871 foreach my $o (@lang_order_list) {
3872 &read_file_cached("$mdir/$dir/$o", \%text);
3875 foreach $o (@lang_order_list) {
3876 &read_file_cached("$mdir/$ol/$o", \%text);
3879 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3881 foreach $k (keys %text) {
3882 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3885 if (defined(&theme_load_language)) {
3886 &theme_load_language(\%text, $_[0]);
3891 =head2 text_subs(string)
3893 Used internally by load_language to expand $code substitutions in language
3899 if (substr($_[0], 0, 8) eq "include:") {
3902 open(INCLUDE, substr($_[0], 8));
3910 my $t = $_[1]->{$_[0]};
3911 return defined($t) ? $t : '$'.$_[0];
3915 =head2 text(message, [substitute]+)
3917 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3918 the substitute parameters. This makes it easy to use strings with placeholders
3919 that get replaced with programmatically generated text. For example :
3921 print &text('index_hello', $remote_user),"<p>\n";
3926 my $t = &get_module_variable('%text', 1);
3927 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3928 for(my $i=1; $i<@_; $i++) {
3929 $rv =~ s/\$$i/$_[$i]/g;
3934 =head2 encode_base64(string)
3936 Encodes a string into base64 format, for use in MIME email or HTTP
3937 authorization headers.
3943 pos($_[0]) = 0; # ensure start at the beginning
3944 while ($_[0] =~ /(.{1,57})/gs) {
3945 $res .= substr(pack('u57', $1), 1)."\n";
3948 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3949 my $padding = (3 - length($_[0]) % 3) % 3;
3950 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3954 =head2 decode_base64(string)
3956 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3963 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3964 if (length($str) % 4) {
3967 $str =~ s/=+$//; # remove padding
3968 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3969 while ($str =~ /(.{1,60})/gs) {
3970 my $len = chr(32 + length($1)*3/4); # compute length byte
3971 $res .= unpack("u", $len . $1 ); # uudecode
3976 =head2 get_module_info(module, [noclone], [forcache])
3978 Returns a hash containg details of the given module. Some useful keys are :
3980 =item dir - The module directory, like sendmail.
3982 =item desc - Human-readable description, in the current users' language.
3984 =item version - Optional module version number.
3986 =item os_support - List of supported operating systems and versions.
3988 =item category - Category on Webmin's left menu, like net.
3993 return () if ($_[0] =~ /^\./);
3994 my (%rv, $clone, $o);
3995 my $mdir = &module_root_directory($_[0]);
3996 &read_file_cached("$mdir/module.info", \%rv) || return ();
3998 foreach $o (@lang_order_list) {
3999 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4000 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4002 if ($clone && !$_[1] && $config_directory) {
4003 $rv{'clone'} = $rv{'desc'};
4004 &read_file("$config_directory/$_[0]/clone", \%rv);
4007 my %module_categories;
4008 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4009 my $pn = &get_product_name();
4010 if (defined($rv{'category_'.$pn})) {
4011 # Can override category for webmin/usermin
4012 $rv{'category'} = $rv{'category_'.$pn};
4014 $rv{'realcategory'} = $rv{'category'};
4015 $rv{'category'} = $module_categories{$_[0]}
4016 if (defined($module_categories{$_[0]}));
4018 # Apply description overrides
4019 $rv{'realdesc'} = $rv{'desc'};
4021 &read_file_cached("$config_directory/webmin.descs", \%descs);
4022 if ($descs{$_[0]." ".$current_lang}) {
4023 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4025 elsif ($descs{$_[0]}) {
4026 $rv{'desc'} = $descs{$_[0]};
4030 # Apply per-user description overridde
4031 my %gaccess = &get_module_acl(undef, "");
4032 if ($gaccess{'desc_'.$_[0]}) {
4033 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4037 if ($rv{'longdesc'}) {
4038 # All standard modules have an index.cgi
4039 $rv{'index_link'} = 'index.cgi';
4042 # Call theme-specific override function
4043 if (defined(&theme_get_module_info)) {
4044 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4050 =head2 get_all_module_infos(cachemode)
4052 Returns a list contains the information on all modules in this webmin
4053 install, including clones. Uses caching to reduce the number of module.info
4054 files that need to be read. Each element of the array is a hash reference
4055 in the same format as returned by get_module_info. The cache mode flag can be :
4056 0 = read and write, 1 = don't read or write, 2 = read only
4059 sub get_all_module_infos
4063 # Is the cache out of date? (ie. have any of the root's changed?)
4064 my $cache_file = "$config_directory/module.infos.cache";
4066 if (&read_file_cached($cache_file, \%cache)) {
4067 foreach my $r (@root_directories) {
4069 if ($st[9] != $cache{'mtime_'.$r}) {
4079 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4080 # Can use existing module.info cache
4082 foreach my $k (keys %cache) {
4083 if ($k =~ /^(\S+) (\S+)$/) {
4084 $mods{$1}->{$2} = $cache{$k};
4087 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4090 # Need to rebuild cache
4092 foreach my $r (@root_directories) {
4094 foreach my $m (readdir(DIR)) {
4095 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4096 my %minfo = &get_module_info($m, 0, 1);
4097 next if (!%minfo || !$minfo{'dir'});
4099 foreach $k (keys %minfo) {
4100 $cache{"${m} ${k}"} = $minfo{$k};
4105 $cache{'mtime_'.$r} = $st[9];
4107 $cache{'lang'} = $current_lang;
4108 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4111 # Override descriptions for modules for current user
4112 my %gaccess = &get_module_acl(undef, "");
4113 foreach my $m (@rv) {
4114 if ($gaccess{"desc_".$m->{'dir'}}) {
4115 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4119 # Apply installed flags
4121 &read_file_cached("$config_directory/installed.cache", \%installed);
4122 foreach my $m (@rv) {
4123 $m->{'installed'} = $installed{$m->{'dir'}};
4129 =head2 get_theme_info(theme)
4131 Returns a hash containing a theme's details, taken from it's theme.info file.
4132 Some useful keys are :
4134 =item dir - The theme directory, like blue-theme.
4136 =item desc - Human-readable description, in the current users' language.
4138 =item version - Optional module version number.
4140 =item os_support - List of supported operating systems and versions.
4145 return () if ($_[0] =~ /^\./);
4147 my $tdir = &module_root_directory($_[0]);
4148 &read_file("$tdir/theme.info", \%rv) || return ();
4149 foreach my $o (@lang_order_list) {
4150 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4156 =head2 list_languages
4158 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4159 Each is a hash reference with the following keys :
4161 =item lang - The short language code, like es for Spanish.
4163 =item desc - A human-readable description, in English.
4165 =item charset - An optional character set to use when displaying the language.
4167 =item titles - Set to 1 only if Webmin has title images for the language.
4169 =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.
4174 if (!@main::list_languages_cache) {
4177 open(LANG, "$root_directory/lang_list.txt");
4179 if (/^(\S+)\s+(.*)/) {
4180 my $l = { 'desc' => $2 };
4181 foreach $o (split(/,/, $1)) {
4182 if ($o =~ /^([^=]+)=(.*)$/) {
4186 $l->{'index'} = scalar(@rv);
4187 push(@main::list_languages_cache, $l);
4191 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4192 @main::list_languages_cache;
4194 return @main::list_languages_cache;
4197 =head2 read_env_file(file, &hash)
4199 Similar to Webmin's read_file function, but handles files containing shell
4200 environment variables formatted like :
4205 The file parameter is the full path to the file to read, and hash a Perl hash
4206 ref to read names and values into.
4212 &open_readfile(FILE, $_[0]) || return 0;
4215 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4216 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4217 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4225 =head2 write_env_file(file, &hash, [export])
4227 Writes out a hash to a file in name='value' format, suitable for use in a shell
4228 script. The parameters are :
4230 =item file - Full path for a file to write to
4232 =item hash - Hash reference of names and values to write.
4234 =item export - If set to 1, preceed each variable setting with the word 'export'.
4239 my $exp = $_[2] ? "export " : "";
4240 &open_tempfile(FILE, ">$_[0]");
4241 foreach my $k (keys %{$_[1]}) {
4242 my $v = $_[1]->{$k};
4243 if ($v =~ /^\S+$/) {
4244 &print_tempfile(FILE, "$exp$k=$v\n");
4247 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4250 &close_tempfile(FILE);
4253 =head2 lock_file(filename, [readonly], [forcefile])
4255 Lock a file for exclusive access. If the file is already locked, spin
4256 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4257 to work OK. The parameters are :
4259 =item filename - File or directory to lock.
4261 =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.
4263 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4268 my $realfile = &translate_filename($_[0]);
4269 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4270 my $no_lock = !&can_lock_file($realfile);
4271 my $lock_tries_count = 0;
4274 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4279 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4282 # Create the .lock file
4283 open(LOCKING, ">$realfile.lock") || return 0;
4284 my $lck = eval "flock(LOCKING, 2+4)";
4286 # Lock of lock file failed! Wait till later
4289 print LOCKING $$,"\n";
4290 eval "flock(LOCKING, 8)";
4293 $main::locked_file_list{$realfile} = int($_[1]);
4294 push(@main::temporary_files, "$realfile.lock");
4295 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4296 !&get_module_variable('$no_log_file_changes') &&
4298 # Grab a copy of this file for later diffing
4300 $main::locked_file_data{$realfile} = undef;
4302 $main::locked_file_type{$realfile} = 1;
4303 $main::locked_file_data{$realfile} = '';
4305 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4306 $main::locked_file_type{$realfile} = 2;
4307 $main::locked_file_data{$realfile} = $lnk;
4309 elsif (open(ORIGFILE, $realfile)) {
4310 $main::locked_file_type{$realfile} = 0;
4311 $main::locked_file_data{$realfile} = '';
4314 $main::locked_file_data{$realfile} .=$_;
4323 if ($lock_tries_count++ > 5*60) {
4324 # Give up after 5 minutes
4325 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4331 =head2 unlock_file(filename)
4333 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4334 file changes is enabled, then at unlock file a diff will be taken between the
4335 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4336 called. This can then be viewed in the Webmin Actions Log module.
4341 my $realfile = &translate_filename($_[0]);
4342 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4343 unlink("$realfile.lock") if (&can_lock_file($realfile));
4344 delete($main::locked_file_list{$realfile});
4345 if (exists($main::locked_file_data{$realfile})) {
4346 # Diff the new file with the old
4348 my $lnk = readlink($realfile);
4349 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4350 my $oldtype = $main::locked_file_type{$realfile};
4351 my $new = !defined($main::locked_file_data{$realfile});
4352 if ($new && !-e _) {
4353 # file doesn't exist, and never did! do nothing ..
4355 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4356 # is (or was) a directory ..
4357 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4358 push(@main::locked_file_diff,
4359 { 'type' => 'mkdir', 'object' => $realfile });
4361 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4362 push(@main::locked_file_diff,
4363 { 'type' => 'rmdir', 'object' => $realfile });
4366 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4367 # is (or was) a symlink ..
4368 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4369 push(@main::locked_file_diff,
4370 { 'type' => 'symlink', 'object' => $realfile,
4373 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4374 push(@main::locked_file_diff,
4375 { 'type' => 'unsymlink', 'object' => $realfile,
4376 'data' => $main::locked_file_data{$realfile} });
4378 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4379 push(@main::locked_file_diff,
4380 { 'type' => 'resymlink', 'object' => $realfile,
4385 # is a file, or has changed type?!
4386 my ($diff, $delete_file);
4387 my $type = "modify";
4389 open(NEWFILE, ">$realfile");
4394 if (!defined($main::locked_file_data{$realfile})) {
4397 open(ORIGFILE, ">$realfile.webminorig");
4398 print ORIGFILE $main::locked_file_data{$realfile};
4400 $diff = &backquote_command(
4401 "diff ".quotemeta("$realfile.webminorig")." ".
4402 quotemeta($realfile)." 2>/dev/null");
4403 push(@main::locked_file_diff,
4404 { 'type' => $type, 'object' => $realfile,
4405 'data' => $diff } ) if ($diff);
4406 unlink("$realfile.webminorig");
4407 unlink($realfile) if ($delete_file);
4410 if ($gconfig{'logfullfiles'}) {
4411 # Add file details to list of those to fully log
4412 $main::orig_file_data{$realfile} ||=
4413 $main::locked_file_data{$realfile};
4414 $main::orig_file_type{$realfile} ||=
4415 $main::locked_file_type{$realfile};
4418 delete($main::locked_file_data{$realfile});
4419 delete($main::locked_file_type{$realfile});
4423 =head2 test_lock(file)
4425 Returns 1 if some file is currently locked, 0 if not.
4430 my $realfile = &translate_filename($_[0]);
4431 return 0 if (!$_[0]);
4432 return 1 if (defined($main::locked_file_list{$realfile}));
4433 return 0 if (!&can_lock_file($realfile));
4435 if (open(LOCKING, "$realfile.lock")) {
4440 return $pid && kill(0, $pid);
4443 =head2 unlock_all_files
4445 Unlocks all files locked by the current script.
4448 sub unlock_all_files
4450 foreach $f (keys %main::locked_file_list) {
4455 =head2 can_lock_file(file)
4457 Returns 1 if some file should be locked, based on the settings in the
4458 Webmin Configuration module. For internal use by lock_file only.
4463 if (&is_readonly_mode()) {
4464 return 0; # never lock in read-only mode
4466 elsif ($gconfig{'lockmode'} == 0) {
4469 elsif ($gconfig{'lockmode'} == 1) {
4473 # Check if under any of the directories
4475 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4476 if (&same_file($d, $_[0]) ||
4477 &is_under_directory($d, $_[0])) {
4481 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4485 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4487 Log some action taken by a user. This is typically called at the end of a
4488 script, once all file changes are complete and all commands run. The
4491 =item action - A short code for the action being performed, like 'create'.
4493 =item type - A code for the type of object the action is performed to, like 'user'.
4495 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4497 =item params - A hash ref of additional information about the action.
4499 =item module - Name of the module in which the action was performed, which defaults to the current module.
4501 =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.
4503 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4505 =item client-ip - IP address of the browser that performed the action.
4510 return if (!$gconfig{'log'} || &is_readonly_mode());
4511 my $m = $_[4] ? $_[4] : &get_module_name();
4513 if ($gconfig{'logclear'}) {
4514 # check if it is time to clear the log
4515 my @st = stat("$webmin_logfile.time");
4516 my $write_logtime = 0;
4518 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4519 # clear logfile and all diff files
4520 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4521 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4522 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4523 unlink($webmin_logfile);
4530 if ($write_logtime) {
4531 open(LOGTIME, ">$webmin_logfile.time");
4532 print LOGTIME time(),"\n";
4537 # If an action script directory is defined, call the appropriate scripts
4538 if ($gconfig{'action_script_dir'}) {
4539 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4540 my ($basedir) = $gconfig{'action_script_dir'};
4542 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4545 opendir(DIR, $dir) or die "Can't open $dir: $!";
4546 while (defined($file = readdir(DIR))) {
4547 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4548 if (-x "$dir/$file") {
4549 # Call a script notifying it of the action
4551 $ENV{'ACTION_MODULE'} = &get_module_name();
4552 $ENV{'ACTION_ACTION'} = $_[0];
4553 $ENV{'ACTION_TYPE'} = $_[1];
4554 $ENV{'ACTION_OBJECT'} = $_[2];
4555 $ENV{'ACTION_SCRIPT'} = $script_name;
4556 foreach my $p (keys %param) {
4557 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4559 system("$dir/$file", @_,
4560 "<$null_file", ">$null_file", "2>&1");
4568 # should logging be done at all?
4569 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4570 split(/\s+/, $gconfig{'logusers'})) < 0);
4571 return if ($gconfig{'logmodules'} && &indexof($m,
4572 split(/\s+/, $gconfig{'logmodules'})) < 0);
4576 my @tm = localtime($now);
4577 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4578 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4579 $main::action_id_count++;
4580 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4581 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4582 $tm[2], $tm[1], $tm[0],
4583 $remote_user || '-',
4584 $main::session_id || '-',
4585 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4586 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4587 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4589 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4590 my $v = $_[3]->{$k};
4596 elsif (ref($v) eq 'ARRAY') {
4600 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4601 $line .= " $k='$vv'";
4605 foreach $vv (split(/\0/, $v)) {
4607 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4608 $line .= " $k='$vv'";
4611 $param{$k} = join(" ", @pv);
4613 open(WEBMINLOG, ">>$webmin_logfile");
4614 print WEBMINLOG $line,"\n";
4616 if ($gconfig{'logperms'}) {
4617 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4620 chmod(0600, $webmin_logfile);
4623 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4624 # Find and record the changes made to any locked files, or commands run
4626 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4627 foreach my $d (@main::locked_file_diff) {
4628 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4629 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4630 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4631 print DIFFLOG $d->{'data'};
4633 if ($d->{'input'}) {
4634 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4635 print DIFFLOG $d->{'input'};
4638 if ($gconfig{'logperms'}) {
4639 chmod(oct($gconfig{'logperms'}),
4640 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4641 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4645 @main::locked_file_diff = undef;
4647 if ($gconfig{'logfullfiles'}) {
4648 # Save the original contents of any modified files
4650 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4651 foreach my $f (keys %main::orig_file_data) {
4652 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4653 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4654 if (!defined($main::orig_file_type{$f})) {
4655 print ORIGLOG -1," ",$f,"\n";
4658 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4660 print ORIGLOG $main::orig_file_data{$f};
4662 if ($gconfig{'logperms'}) {
4663 chmod(oct($gconfig{'logperms'}),
4664 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4668 %main::orig_file_data = undef;
4669 %main::orig_file_type = undef;
4673 if ($gconfig{'logsyslog'}) {
4674 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4675 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4676 setlogsock("inet");';
4678 # Syslog module is installed .. try to convert to a
4679 # human-readable form
4681 my $mod = &get_module_name();
4682 my $mdir = module_root_directory($mod);
4683 if (-r "$mdir/log_parser.pl") {
4684 &foreign_require($mod, "log_parser.pl");
4686 foreach my $k (keys %{$_[3]}) {
4687 my $v = $_[3]->{$k};
4688 if (ref($v) eq 'ARRAY') {
4689 $params{$k} = join("\0", @$v);
4695 $msg = &foreign_call($mod, "parse_webmin_log",
4696 $remote_user, $script_name,
4697 $_[0], $_[1], $_[2], \%params);
4698 $msg =~ s/<[^>]*>//g; # Remove tags
4700 elsif ($_[0] eq "_config_") {
4701 my %wtext = &load_language("webminlog");
4702 $msg = $wtext{'search_config'};
4704 $msg ||= "$_[0] $_[1] $_[2]";
4705 my %info = &get_module_info($m);
4706 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4711 =head2 additional_log(type, object, data, [input])
4713 Records additional log data for an upcoming call to webmin_log, such
4714 as a command that was run or SQL that was executed. Typically you will never
4715 need to call this function directory.
4720 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4721 push(@main::locked_file_diff,
4722 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4723 'input' => $_[3] } );
4727 =head2 webmin_debug_log(type, message)
4729 Write something to the Webmin debug log. For internal use only.
4732 sub webmin_debug_log
4734 my ($type, $msg) = @_;
4735 return 0 if (!$main::opened_debug_log);
4736 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4737 if ($gconfig{'debug_modules'}) {
4738 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
4739 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
4742 my @tm = localtime($now);
4744 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4745 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4746 $tm[2], $tm[1], $tm[0],
4747 $remote_user || "-",
4748 $ENV{'REMOTE_HOST'} || "-",
4749 &get_module_name() || "-",
4752 seek(main::DEBUGLOG, 0, 2);
4753 print main::DEBUGLOG $line."\n";
4757 =head2 system_logged(command)
4759 Just calls the Perl system() function, but also logs the command run.
4764 if (&is_readonly_mode()) {
4765 print STDERR "Vetoing command $_[0]\n";
4768 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4769 my $cmd = join(" ", @realcmd);
4771 if ($cmd =~ s/(\s*&\s*)$//) {
4774 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4775 $cmd =~ s/^\((.*)\)\s*$/$1/;
4777 &additional_log('exec', undef, $cmd);
4778 return system(@realcmd);
4781 =head2 backquote_logged(command)
4783 Executes a command and returns the output (like `command`), but also logs it.
4786 sub backquote_logged
4788 if (&is_readonly_mode()) {
4790 print STDERR "Vetoing command $_[0]\n";
4793 my $realcmd = &translate_command($_[0]);
4796 if ($cmd =~ s/(\s*&\s*)$//) {
4799 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4800 $cmd =~ s/^\((.*)\)\s*$/$1/;
4802 &additional_log('exec', undef, $cmd);
4803 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4807 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4809 Runs some command, waiting at most the given number of seconds for it to
4810 complete, and returns the output. The maxlines parameter sets the number
4811 of lines of output to capture. The safe parameter should be set to 1 if the
4812 command is safe for read-only mode users to run.
4815 sub backquote_with_timeout
4817 my $realcmd = &translate_command($_[0]);
4818 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4819 if ($gconfig{'debug_what_cmd'});
4821 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4826 my $elapsed = time() - $start;
4827 last if ($elapsed > $_[1]);
4829 vec($rmask, fileno(OUT), 1) = 1;
4830 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4831 last if (!$sel || $sel < 0);
4833 last if (!defined($line));
4836 if ($_[3] && $linecount >= $_[3]) {
4841 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4845 return wantarray ? ($out, $timed_out) : $out;
4848 =head2 backquote_command(command, safe?)
4850 Executes a command and returns the output (like `command`), subject to
4851 command translation. The safe parameter should be set to 1 if the command
4852 is safe for read-only mode users to run.
4855 sub backquote_command
4857 if (&is_readonly_mode() && !$_[1]) {
4858 print STDERR "Vetoing command $_[0]\n";
4862 my $realcmd = &translate_command($_[0]);
4863 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4867 =head2 kill_logged(signal, pid, ...)
4869 Like Perl's built-in kill function, but also logs the fact that some process
4870 was killed. On Windows, falls back to calling process.exe to terminate a
4876 return scalar(@_)-1 if (&is_readonly_mode());
4877 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4878 if ($gconfig{'debug_what_procs'});
4879 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4880 if ($gconfig{'os_type'} eq 'windows') {
4881 # Emulate some kills with process.exe
4882 my $arg = $_[0] eq "KILL" ? "-k" :
4883 $_[0] eq "TERM" ? "-q" :
4884 $_[0] eq "STOP" ? "-s" :
4885 $_[0] eq "CONT" ? "-r" : undef;
4887 foreach my $p (@_[1..@_-1]) {
4889 $ok ||= kill($_[0], $p);
4892 &execute_command("process $arg $p");
4904 =head2 rename_logged(old, new)
4906 Re-names a file and logs the rename. If the old and new files are on different
4907 filesystems, calls mv or the Windows rename function to do the job.
4912 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4913 return &rename_file($_[0], $_[1]);
4916 =head2 rename_file(old, new)
4918 Renames a file or directory. If the old and new files are on different
4919 filesystems, calls mv or the Windows rename function to do the job.
4924 if (&is_readonly_mode()) {
4925 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4928 my $src = &translate_filename($_[0]);
4929 my $dst = &translate_filename($_[1]);
4930 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4931 if ($gconfig{'debug_what_ops'});
4932 my $ok = rename($src, $dst);
4933 if (!$ok && $! !~ /permission/i) {
4934 # Try the mv command, in case this is a cross-filesystem rename
4935 if ($gconfig{'os_type'} eq 'windows') {
4936 # Need to use rename
4937 my $out = &backquote_command("rename ".quotemeta($_[0]).
4938 " ".quotemeta($_[1])." 2>&1");
4940 $! = $out if (!$ok);
4944 my $out = &backquote_command("mv ".quotemeta($_[0]).
4945 " ".quotemeta($_[1])." 2>&1");
4947 $! = $out if (!$ok);
4953 =head2 symlink_logged(src, dest)
4955 Create a symlink, and logs it. Effectively does the same thing as the Perl
4962 my $rv = &symlink_file($_[0], $_[1]);
4963 &unlock_file($_[1]);
4967 =head2 symlink_file(src, dest)
4969 Creates a soft link, unless in read-only mode. Effectively does the same thing
4970 as the Perl symlink function.
4975 if (&is_readonly_mode()) {
4976 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4979 my $src = &translate_filename($_[0]);
4980 my $dst = &translate_filename($_[1]);
4981 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
4982 if ($gconfig{'debug_what_ops'});
4983 return symlink($src, $dst);
4986 =head2 link_file(src, dest)
4988 Creates a hard link, unless in read-only mode. The existing new link file
4989 will be deleted if necessary. Effectively the same as Perl's link function.
4994 if (&is_readonly_mode()) {
4995 print STDERR "Vetoing link from $_[0] to $_[1]\n";
4998 my $src = &translate_filename($_[0]);
4999 my $dst = &translate_filename($_[1]);
5000 &webmin_debug_log('LINK', "src=$src dst=$dst")
5001 if ($gconfig{'debug_what_ops'});
5002 unlink($dst); # make sure link works
5003 return link($src, $dst);
5006 =head2 make_dir(dir, perms, recursive)
5008 Creates a directory and sets permissions on it, unless in read-only mode.
5009 The perms parameter sets the octal permissions to apply, which unlike Perl's
5010 mkdir will really get set. The recursive flag can be set to 1 to have the
5011 function create parent directories too.
5016 my ($dir, $perms, $recur) = @_;
5017 if (&is_readonly_mode()) {
5018 print STDERR "Vetoing directory $dir\n";
5021 $dir = &translate_filename($dir);
5022 my $exists = -d $dir ? 1 : 0;
5023 return 1 if ($exists && $recur); # already exists
5024 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5025 my $rv = mkdir($dir, $perms);
5026 if (!$rv && $recur) {
5027 # Failed .. try mkdir -p
5028 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5029 my $ex = &execute_command("mkdir $param "."e_path($dir));
5035 chmod($perms, $dir);
5040 =head2 set_ownership_permissions(user, group, perms, file, ...)
5042 Sets the user, group owner and permissions on some files. The parameters are :
5044 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5046 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5048 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5050 =item file - One or more files or directories to modify.
5053 sub set_ownership_permissions
5055 my ($user, $group, $perms, @files) = @_;
5056 if (&is_readonly_mode()) {
5057 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5060 @files = map { &translate_filename($_) } @files;
5061 if ($gconfig{'debug_what_ops'}) {
5062 foreach my $f (@files) {
5063 &webmin_debug_log('PERMS',
5064 "file=$f user=$user group=$group perms=$perms");
5068 if (defined($user)) {
5069 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5071 if (defined($group)) {
5072 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5075 my @uinfo = getpwuid($uid);
5078 $rv = chown($uid, $gid, @files);
5080 if ($rv && defined($perms)) {
5081 $rv = chmod($perms, @files);
5086 =head2 unlink_logged(file, ...)
5088 Like Perl's unlink function, but locks the files beforehand and un-locks them
5089 after so that the deletion is logged by Webmin.
5095 foreach my $f (@_) {
5096 if (!&test_lock($f)) {
5101 my @rv = &unlink_file(@_);
5102 foreach my $f (@_) {
5107 return wantarray ? @rv : $rv[0];
5110 =head2 unlink_file(file, ...)
5112 Deletes some files or directories. Like Perl's unlink function, but also
5113 recursively deletes directories with the rm command if needed.
5118 return 1 if (&is_readonly_mode());
5121 foreach my $f (@_) {
5122 &unflush_file_lines($f);
5123 my $realf = &translate_filename($f);
5124 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5126 if (!rmdir($realf)) {
5128 if ($gconfig{'os_type'} eq 'windows') {
5129 # Call del and rmdir commands
5132 my $out = `del /q "$qm" 2>&1`;
5134 $out = `rmdir "$qm" 2>&1`;
5139 my $qm = quotemeta($realf);
5140 $out = `rm -rf $qm 2>&1`;
5149 if (!unlink($realf)) {
5155 return wantarray ? ($rv, $err) : $rv;
5158 =head2 copy_source_dest(source, dest)
5160 Copy some file or directory to a new location. Returns 1 on success, or 0
5161 on failure - also sets $! on failure. If the source is a directory, uses
5162 piped tar commands to copy a whole directory structure including permissions
5166 sub copy_source_dest
5168 return (1, undef) if (&is_readonly_mode());
5169 my ($src, $dst) = @_;
5172 &webmin_debug_log('COPY', "src=$src dst=$dst")
5173 if ($gconfig{'debug_what_ops'});
5174 if ($gconfig{'os_type'} eq 'windows') {
5175 # No tar or cp on windows, so need to use copy command
5179 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5182 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5190 # A directory .. need to copy with tar command
5191 my @st = stat($src);
5194 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5195 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5202 # Can just copy with cp
5203 my $out = &backquote_logged("cp -p ".quotemeta($src).
5204 " ".quotemeta($dst)." 2>&1");
5210 return wantarray ? ($ok, $err) : $ok;
5213 =head2 remote_session_name(host|&server)
5215 Generates a session ID for some server. For this server, this will always
5216 be an empty string. For a server object it will include the hostname and
5217 port and PID. For a server name, it will include the hostname and PID. For
5221 sub remote_session_name
5223 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5224 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5225 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5226 ref($_[0]) ? "" : "$_[0].$$";
5229 =head2 remote_foreign_require(server, module, file)
5231 Connects to rpc.cgi on a remote webmin server and have it open a session
5232 to a process that will actually do the require and run functions. This is the
5233 equivalent for foreign_require, but for a remote Webmin system. The server
5234 parameter can either be a hostname of a system registered in the Webmin
5235 Servers Index module, or a hash reference for a system from that module.
5238 sub remote_foreign_require
5240 my $call = { 'action' => 'require',
5243 my $sn = &remote_session_name($_[0]);
5244 if ($remote_session{$sn}) {
5245 $call->{'session'} = $remote_session{$sn};
5248 $call->{'newsession'} = 1;
5250 my $rv = &remote_rpc_call($_[0], $call);
5251 if ($rv->{'session'}) {
5252 $remote_session{$sn} = $rv->{'session'};
5253 $remote_session_server{$sn} = $_[0];
5257 =head2 remote_foreign_call(server, module, function, [arg]*)
5259 Call a function on a remote server. Must have been setup first with
5260 remote_foreign_require for the same server and module. Equivalent to
5261 foreign_call, but with the extra server parameter to specify the remote
5265 sub remote_foreign_call
5267 return undef if (&is_readonly_mode());
5268 my $sn = &remote_session_name($_[0]);
5269 return &remote_rpc_call($_[0], { 'action' => 'call',
5272 'session' => $remote_session{$sn},
5273 'args' => [ @_[3 .. $#_] ] } );
5276 =head2 remote_foreign_check(server, module, [api-only])
5278 Checks if some module is installed and supported on a remote server. Equivilant
5279 to foreign_check, but for the remote Webmin system specified by the server
5283 sub remote_foreign_check
5285 return &remote_rpc_call($_[0], { 'action' => 'check',
5290 =head2 remote_foreign_config(server, module)
5292 Gets the configuration for some module from a remote server, as a hash.
5293 Equivalent to foreign_config, but for a remote system.
5296 sub remote_foreign_config
5298 return &remote_rpc_call($_[0], { 'action' => 'config',
5299 'module' => $_[1] });
5302 =head2 remote_eval(server, module, code)
5304 Evaluates some perl code in the context of a module on a remote webmin server.
5305 The server parameter must be the hostname of a remote system, module must
5306 be a module directory name, and code a string of Perl code to run. This can
5307 only be called after remote_foreign_require for the same server and module.
5312 return undef if (&is_readonly_mode());
5313 my $sn = &remote_session_name($_[0]);
5314 return &remote_rpc_call($_[0], { 'action' => 'eval',
5317 'session' => $remote_session{$sn} });
5320 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5322 Transfers some local file to another server via Webmin's RPC protocol, and
5323 returns the resulting remote filename. If the remotefile parameter is given,
5324 that is the destination filename which will be used. Otherwise a randomly
5325 selected temporary filename will be used, and returned by the function.
5330 return undef if (&is_readonly_mode());
5332 my $sn = &remote_session_name($_[0]);
5333 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5334 # Copy data over TCP connection
5335 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5337 'name' => $_[3] } );
5339 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5340 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5341 return &$main::remote_error_handler("Failed to transfer file : $error")
5344 while(read(FILE, $got, 1024) > 0) {
5348 shutdown(TWRITE, 1);
5350 if ($error && $error !~ /^OK/) {
5351 # Got back an error!
5352 return &$main::remote_error_handler("Failed to transfer file : $error");
5358 # Just pass file contents as parameters
5360 while(read(FILE, $got, 1024) > 0) {
5364 return &remote_rpc_call($_[0], { 'action' => 'write',
5367 'session' => $remote_session{$sn} });
5371 =head2 remote_read(server, localfile, remotefile)
5373 Transfers a file from a remote server to this system, using Webmin's RPC
5374 protocol. The server parameter must be the hostname of a system registered
5375 in the Webmin Servers Index module, localfile is the destination path on this
5376 system, and remotefile is the file to fetch from the remote server.
5381 my $sn = &remote_session_name($_[0]);
5382 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5383 # Copy data over TCP connection
5384 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5385 'file' => $_[2] } );
5387 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5390 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5391 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5392 return &$main::remote_error_handler("Failed to transfer file : $error")
5395 open(FILE, ">$_[1]");
5396 while(read(TREAD, $got, 1024) > 0) {
5403 # Just get data as return value
5404 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5406 'session' => $remote_session{$sn} });
5407 open(FILE, ">$_[1]");
5413 =head2 remote_finished
5415 Close all remote sessions. This happens automatically after a while
5416 anyway, but this function should be called to clean things up faster.
5421 foreach my $sn (keys %remote_session) {
5422 my $server = $remote_session_server{$sn};
5423 &remote_rpc_call($server, { 'action' => 'quit',
5424 'session' => $remote_session{$sn} } );
5425 delete($remote_session{$sn});
5426 delete($remote_session_server{$sn});
5428 foreach $fh (keys %fast_fh_cache) {
5430 delete($fast_fh_cache{$fh});
5434 =head2 remote_error_setup(&function)
5436 Sets a function to be called instead of &error when a remote RPC operation
5437 fails. Useful if you want to have more control over your remote operations.
5440 sub remote_error_setup
5442 $main::remote_error_handler = $_[0] || \&error;
5445 =head2 remote_rpc_call(server, structure)
5447 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5448 and then reads back a reply structure. This is mainly for internal use only,
5449 and is called by the other remote_* functions.
5455 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5457 # Server structure was given
5459 $serv->{'user'} || $serv->{'id'} == 0 ||
5460 return &$main::remote_error_handler(
5461 "No Webmin login set for server");
5464 # lookup the server in the webmin servers module if needed
5465 if (!%main::remote_servers_cache) {
5466 &foreign_require("servers", "servers-lib.pl");
5467 foreach $s (&foreign_call("servers", "list_servers")) {
5468 $main::remote_servers_cache{$s->{'host'}} = $s;
5469 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5472 $serv = $main::remote_servers_cache{$_[0]};
5473 $serv || return &$main::remote_error_handler(
5474 "No Webmin Servers entry for $_[0]");
5475 $serv->{'user'} || return &$main::remote_error_handler(
5476 "No login set for server $_[0]");
5478 my $ip = $serv->{'ip'} || $serv->{'host'};
5480 # Work out the username and password
5482 if ($serv->{'sameuser'}) {
5483 $user = $remote_user;
5484 defined($main::remote_pass) || return &$main::remote_error_handler(
5485 "Password for this server is not available");
5486 $pass = $main::remote_pass;
5489 $user = $serv->{'user'};
5490 $pass = $serv->{'pass'};
5493 if ($serv->{'fast'} || !$sn) {
5494 # Make TCP connection call to fastrpc.cgi
5495 if (!$fast_fh_cache{$sn} && $sn) {
5496 # Need to open the connection
5497 my $con = &make_http_connection(
5498 $ip, $serv->{'port'}, $serv->{'ssl'},
5499 "POST", "/fastrpc.cgi");
5500 return &$main::remote_error_handler(
5501 "Failed to connect to $serv->{'host'} : $con")
5503 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5504 &write_http_connection($con, "User-agent: Webmin\r\n");
5505 my $auth = &encode_base64("$user:$pass");
5507 &write_http_connection($con, "Authorization: basic $auth\r\n");
5508 &write_http_connection($con, "Content-length: ",
5509 length($tostr),"\r\n");
5510 &write_http_connection($con, "\r\n");
5511 &write_http_connection($con, $tostr);
5513 # read back the response
5514 my $line = &read_http_connection($con);
5515 $line =~ tr/\r\n//d;
5516 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5517 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5519 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5520 return &$main::remote_error_handler("HTTP error : $line");
5522 $line = &read_http_connection($con);
5523 $line =~ tr/\r\n//d;
5525 $line = &read_http_connection($con);
5526 if ($line =~ /^0\s+(.*)/) {
5527 return &$main::remote_error_handler("RPC error : $1");
5529 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5530 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5531 # Started ok .. connect and save SID
5532 &close_http_connection($con);
5533 my ($port, $sid, $version, $error) = ($1, $2, $3);
5534 &open_socket($ip, $port, $sid, \$error);
5535 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5537 $fast_fh_cache{$sn} = $sid;
5538 $remote_server_version{$sn} = $version;
5541 while($stuff = &read_http_connection($con)) {
5544 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5547 elsif (!$fast_fh_cache{$sn}) {
5548 # Open the connection by running fastrpc.cgi locally
5549 pipe(RPCOUTr, RPCOUTw);
5553 open(STDOUT, ">&RPCOUTw");
5557 $ENV{'REQUEST_METHOD'} = 'GET';
5558 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5559 $ENV{'SERVER_ROOT'} ||= $root_directory;
5561 if ($base_remote_user ne 'root' &&
5562 $base_remote_user ne 'admin') {
5563 # Need to fake up a login for the CGI!
5564 &read_acl(undef, \%acl);
5565 $ENV{'BASE_REMOTE_USER'} =
5566 $ENV{'REMOTE_USER'} =
5567 $acl{'root'} ? 'root' : 'admin';
5569 delete($ENV{'FOREIGN_MODULE_NAME'});
5570 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5571 chdir($root_directory);
5572 if (!exec("$root_directory/fastrpc.cgi")) {
5573 print "exec failed : $!\n";
5580 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5584 if ($line =~ /^0\s+(.*)/) {
5585 return &$main::remote_error_handler("RPC error : $2");
5587 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5588 # Started ok .. connect and save SID
5590 my ($port, $sid, $error) = ($1, $2, undef);
5591 &open_socket("localhost", $port, $sid, \$error);
5592 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5593 $fast_fh_cache{$sn} = $sid;
5600 &error("Bad response from fastrpc.cgi : $line");
5603 # Got a connection .. send off the request
5604 my $fh = $fast_fh_cache{$sn};
5605 my $tostr = &serialise_variable($_[1]);
5606 print $fh length($tostr)," $fh\n";
5608 my $rlen = int(<$fh>);
5609 my ($fromstr, $got);
5610 while(length($fromstr) < $rlen) {
5611 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5612 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5615 my $from = &unserialise_variable($fromstr);
5617 return &$main::remote_error_handler("Remote Webmin error");
5619 if (defined($from->{'arv'})) {
5620 return @{$from->{'arv'}};
5623 return $from->{'rv'};
5627 # Call rpc.cgi on remote server
5628 my $tostr = &serialise_variable($_[1]);
5630 my $con = &make_http_connection($ip, $serv->{'port'},
5631 $serv->{'ssl'}, "POST", "/rpc.cgi");
5632 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5634 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5635 &write_http_connection($con, "User-agent: Webmin\r\n");
5636 my $auth = &encode_base64("$user:$pass");
5638 &write_http_connection($con, "Authorization: basic $auth\r\n");
5639 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5640 &write_http_connection($con, "\r\n");
5641 &write_http_connection($con, $tostr);
5643 # read back the response
5644 my $line = &read_http_connection($con);
5645 $line =~ tr/\r\n//d;
5646 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5647 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5649 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5651 $line = &read_http_connection($con);
5652 $line =~ tr/\r\n//d;
5655 while($line = &read_http_connection($con)) {
5659 my $from = &unserialise_variable($fromstr);
5660 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5661 if (defined($from->{'arv'})) {
5662 return @{$from->{'arv'}};
5665 return $from->{'rv'};
5670 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5672 Executes some function in parallel on multiple servers at once. Fills in
5673 the returns and errors arrays respectively. If the module and library
5674 parameters are given, that module is remotely required on the server first,
5675 to check if it is connectable. The parameters are :
5677 =item servers - A list of Webmin system hash references.
5679 =item parallel - Number of parallel operations to perform.
5681 =item function - Reference to function to call for each system.
5683 =item args - Additional parameters to the function.
5685 =item returns - Array ref to place return values into, in same order as servers.
5687 =item errors - Array ref to place error messages into.
5689 =item module - Optional module to require on the remote system first.
5691 =item library - Optional library to require in the module.
5694 sub remote_multi_callback
5696 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5697 &remote_error_setup(\&remote_multi_callback_error);
5699 # Call the functions
5701 foreach my $g (@$servs) {
5707 $remote_multi_callback_err = undef;
5709 # Require the remote lib
5710 &remote_foreign_require($g->{'host'}, $mod, $lib);
5711 if ($remote_multi_callback_err) {
5712 # Failed .. return error
5713 print $wh &serialise_variable(
5714 [ undef, $remote_multi_callback_err ]);
5720 my $a = ref($args) ? $args->[$p] : $args;
5721 my $rv = &$func($g, $a);
5724 print $wh &serialise_variable(
5725 [ $rv, $remote_multi_callback_err ]);
5733 # Read back the results
5735 foreach my $g (@$servs) {
5739 $errs->[$p] = "Failed to read response from $g->{'host'}";
5742 my $rv = &unserialise_variable($line);
5744 $rets->[$p] = $rv->[0];
5745 $errs->[$p] = $rv->[1];
5750 &remote_error_setup(undef);
5753 sub remote_multi_callback_error
5755 $remote_multi_callback_err = $_[0];
5758 =head2 serialise_variable(variable)
5760 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5761 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5762 called on each member to serialize the entire object.
5765 sub serialise_variable
5767 if (!defined($_[0])) {
5773 $rv = &urlize($_[0]);
5775 elsif ($r eq 'SCALAR') {
5776 $rv = &urlize(${$_[0]});
5778 elsif ($r eq 'ARRAY') {
5779 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5781 elsif ($r eq 'HASH') {
5782 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5783 &urlize(&serialise_variable($_[0]->{$_})) }
5786 elsif ($r eq 'REF') {
5787 $rv = &serialise_variable(${$_[0]});
5789 elsif ($r eq 'CODE') {
5794 # An object - treat as a hash
5795 $r = "OBJECT ".&urlize($r);
5796 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5797 &urlize(&serialise_variable($_[0]->{$_})) }
5800 return ($r ? $r : 'VAL').",".$rv;
5803 =head2 unserialise_variable(string)
5805 Converts a string created by serialise_variable() back into the original
5806 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5807 object, the same class is used on this system, if available.
5810 sub unserialise_variable
5812 my @v = split(/,/, $_[0]);
5814 if ($v[0] eq 'VAL') {
5815 @v = split(/,/, $_[0], -1);
5816 $rv = &un_urlize($v[1]);
5818 elsif ($v[0] eq 'SCALAR') {
5819 local $r = &un_urlize($v[1]);
5822 elsif ($v[0] eq 'ARRAY') {
5824 for(my $i=1; $i<@v; $i++) {
5825 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5828 elsif ($v[0] eq 'HASH') {
5830 for(my $i=1; $i<@v; $i+=2) {
5831 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5832 &unserialise_variable(&un_urlize($v[$i+1]));
5835 elsif ($v[0] eq 'REF') {
5836 local $r = &unserialise_variable($v[1]);
5839 elsif ($v[0] eq 'UNDEF') {
5842 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5843 # An object hash that we have to re-bless
5846 for(my $i=1; $i<@v; $i+=2) {
5847 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5848 &unserialise_variable(&un_urlize($v[$i+1]));
5856 =head2 other_groups(user)
5858 Returns a list of secondary groups a user is a member of, as a list of
5867 while(my @g = getgrent()) {
5868 my @m = split(/\s+/, $g[3]);
5869 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5871 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5875 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5877 Returns HTML for a button that pops up a data chooser window. The parameters
5880 =item dayfield - Name of the text field to place the day of the month into.
5882 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5884 =item yearfield - Name of the text field to place the year into.
5887 sub date_chooser_button
5889 return &theme_date_chooser_button(@_)
5890 if (defined(&theme_date_chooser_button));
5891 my ($w, $h) = (250, 225);
5892 if ($gconfig{'db_sizedate'}) {
5893 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5895 return "<input type=button onClick='window.dfield = form.$_[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";
5898 =head2 help_file(module, file)
5900 Returns the path to a module's help file of some name, typically under the
5901 help directory with a .html extension.
5906 my $mdir = &module_root_directory($_[0]);
5907 my $dir = "$mdir/help";
5908 foreach my $o (@lang_order_list) {
5909 my $lang = "$dir/$_[1].$o.html";
5910 return $lang if (-r $lang);
5912 return "$dir/$_[1].html";
5917 Seeds the random number generator, if not already done in this script. On Linux
5918 this makes use of the current time, process ID and a read from /dev/urandom.
5919 On other systems, only the current time and process ID are used.
5924 if (!$main::done_seed_random) {
5925 if (open(RANDOM, "/dev/urandom")) {
5927 read(RANDOM, $buf, 4);
5929 srand(time() ^ $$ ^ $buf);
5934 $main::done_seed_random = 1;
5938 =head2 disk_usage_kb(directory)
5940 Returns the number of kB used by some directory and all subdirs. Implemented
5941 by calling the C<du -k> command.
5946 my $dir = &translate_filename($_[0]);
5948 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5950 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5952 return $out =~ /^([0-9]+)/ ? $1 : "???";
5955 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
5957 Returns the number of bytes taken up by all files in some directory and all
5958 sub-directories, by summing up their lengths. The disk_usage_kb is more
5959 reflective of reality, as the filesystem typically pads file sizes to 1k or
5963 sub recursive_disk_usage
5965 my $dir = &translate_filename($_[0]);
5972 my @st = stat($dir);
5978 my @files = readdir(DIR);
5980 foreach my $f (@files) {
5981 next if ($f eq "." || $f eq "..");
5982 next if ($skip && $f =~ /$skip/);
5983 next if ($only && $f !~ /$only/);
5984 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
5990 =head2 help_search_link(term, [ section, ... ] )
5992 Returns HTML for a link to the man module for searching local and online
5993 docs for various search terms. The term parameter can either be a single
5994 word like 'bind', or a space-separated list of words. This function is typically
5995 used by modules that want to refer users to additional documentation in man
5996 pages or local system doc files.
5999 sub help_search_link
6001 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6002 my $for = &urlize(shift(@_));
6003 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6004 join("&", map { "section=$_" } @_)."&".
6005 "for=$for&exact=1&check=".&get_module_name()."'>".
6006 $text{'helpsearch'}."</a>\n";
6013 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6015 Opens a connection to some HTTP server, maybe through a proxy, and returns
6016 a handle object. The handle can then be used to send additional headers
6017 and read back a response. If anything goes wrong, returns an error string.
6018 The parameters are :
6020 =item host - Hostname or IP address of the webserver to connect to.
6022 =item port - HTTP port number to connect to.
6024 =item ssl - Set to 1 to connect in SSL mode.
6026 =item method - HTTP method, like GET or POST.
6028 =item page - Page to request on the webserver, like /foo/index.html
6030 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6033 sub make_http_connection
6035 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6038 foreach my $h (@$headers) {
6039 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6043 if (&is_readonly_mode()) {
6044 return "HTTP connections not allowed in readonly mode";
6046 my $rv = { 'fh' => time().$$ };
6049 eval "use Net::SSLeay";
6050 $@ && return $text{'link_essl'};
6051 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6052 eval "Net::SSLeay::load_error_strings()";
6053 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6054 return "Failed to create SSL context";
6055 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6056 return "Failed to create SSL connection";
6058 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6059 !&no_proxy($host)) {
6062 &open_socket($1, $2, $rv->{'fh'}, \$error);
6065 my $fh = $rv->{'fh'};
6066 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6067 if ($gconfig{'proxy_user'}) {
6068 my $auth = &encode_base64(
6069 "$gconfig{'proxy_user'}:".
6070 "$gconfig{'proxy_pass'}");
6071 $auth =~ tr/\r\n//d;
6072 print $fh "Proxy-Authorization: Basic $auth\r\n";
6076 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6077 return "Proxy error : $3" if ($2 != 200);
6080 return "Proxy error : $line";
6085 elsif (!$gconfig{'proxy_fallback'}) {
6086 # Connection to proxy failed - give up
6093 &open_socket($host, $port, $rv->{'fh'}, \$error);
6094 return $error if ($error);
6096 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6097 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6098 return "SSL connect() failed";
6099 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6100 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6103 # Plain HTTP request
6105 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6106 !&no_proxy($host)) {
6109 &open_socket($1, $2, $rv->{'fh'}, \$error);
6113 my $fh = $rv->{'fh'};
6114 my $rtxt = $method." ".
6115 "http://$host:$port$page HTTP/1.0\r\n";
6116 if ($gconfig{'proxy_user'}) {
6117 my $auth = &encode_base64(
6118 "$gconfig{'proxy_user'}:".
6119 "$gconfig{'proxy_pass'}");
6120 $auth =~ tr/\r\n//d;
6121 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6126 elsif (!$gconfig{'proxy_fallback'}) {
6131 # Connecting directly
6133 &open_socket($host, $port, $rv->{'fh'}, \$error);
6134 return $error if ($error);
6135 my $fh = $rv->{'fh'};
6136 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6143 =head2 read_http_connection(&handle, [bytes])
6145 Reads either one line or up to the specified number of bytes from the handle,
6146 originally supplied by make_http_connection.
6149 sub read_http_connection
6153 if ($h->{'ssl_con'}) {
6156 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6157 # need to read more..
6158 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6160 $rv = $h->{'buffer'};
6161 delete($h->{'buffer'});
6164 $h->{'buffer'} .= $more;
6166 $rv = substr($h->{'buffer'}, 0, $idx+1);
6167 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6170 if (length($h->{'buffer'})) {
6171 $rv = $h->{'buffer'};
6172 delete($h->{'buffer'});
6175 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6181 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6184 my $fh = $h->{'fh'};
6188 $rv = undef if ($rv eq "");
6192 =head2 write_http_connection(&handle, [data+])
6194 Writes the given data to the given HTTP connection handle.
6197 sub write_http_connection
6200 my $fh = $h->{'fh'};
6202 if ($h->{'ssl_ctx'}) {
6203 foreach my $s (@_) {
6204 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6205 $allok = 0 if (!$ok);
6209 my $ok = (print $fh @_);
6210 $allok = 0 if (!$ok);
6215 =head2 close_http_connection(&handle)
6217 Closes a connection to an HTTP server, identified by the given handle.
6220 sub close_http_connection
6226 =head2 clean_environment
6228 Deletes any environment variables inherited from miniserv so that they
6229 won't be passed to programs started by webmin. This is useful when calling
6230 programs that check for CGI-related environment variables and modify their
6231 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6234 sub clean_environment
6236 %UNCLEAN_ENV = %ENV;
6237 foreach my $k (keys %ENV) {
6238 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6242 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6243 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6244 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6245 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6246 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6247 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6248 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6249 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD') {
6254 =head2 reset_environment
6256 Puts the environment back how it was before clean_environment was callled.
6259 sub reset_environment
6262 foreach my $k (keys %UNCLEAN_ENV) {
6263 $ENV{$k} = $UNCLEAN_ENV{$k};
6265 undef(%UNCLEAN_ENV);
6269 =head2 progress_callback
6271 Never called directly, but useful for passing to &http_download to print
6272 out progress of an HTTP request.
6275 sub progress_callback
6277 if (defined(&theme_progress_callback)) {
6278 # Call the theme override
6279 return &theme_progress_callback(@_);
6283 print $progress_callback_prefix;
6285 $progress_size = $_[1];
6286 $progress_step = int($_[1] / 10);
6287 print &text('progress_size2', $progress_callback_url,
6288 &nice_size($progress_size)),"<br>\n";
6291 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6293 $last_progress_time = $last_progress_size = undef;
6295 elsif ($_[0] == 3) {
6297 my $sp = $progress_callback_prefix.(" " x 5);
6298 if ($progress_size) {
6299 # And we have a size to compare against
6300 my $st = int(($_[1] * 10) / $progress_size);
6301 my $time_now = time();
6302 if ($st != $progress_step ||
6303 $time_now - $last_progress_time > 60) {
6304 # Show progress every 10% or 60 seconds
6305 print $sp,&text('progress_datan', &nice_size($_[1]),
6306 int($_[1]*100/$progress_size)),"<br>\n";
6307 $last_progress_time = $time_now;
6309 $progress_step = $st;
6312 # No total size .. so only show in 100k jumps
6313 if ($_[1] > $last_progress_size+100*1024) {
6314 print $sp,&text('progress_data2n',
6315 &nice_size($_[1])),"<br>\n";
6316 $last_progress_size = $_[1];
6320 elsif ($_[0] == 4) {
6321 # All done downloading
6322 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6324 elsif ($_[0] == 5) {
6325 # Got new location after redirect
6326 $progress_callback_url = $_[1];
6328 elsif ($_[0] == 6) {
6330 $progress_callback_url = $_[1];
6331 print &text('progress_incache', $progress_callback_url),"<br>\n";
6335 =head2 switch_to_remote_user
6337 Changes the user and group of the current process to that of the unix user
6338 with the same name as the current webmin login, or fails if there is none.
6339 This should be called by Usermin module scripts that only need to run with
6340 limited permissions.
6343 sub switch_to_remote_user
6345 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6347 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6348 &create_missing_homedir(\@remote_user_info);
6350 &switch_to_unix_user(\@remote_user_info);
6351 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6352 $ENV{'HOME'} = $remote_user_info[7];
6354 # Export global variables to caller
6355 if ($main::export_to_caller) {
6356 my ($callpkg) = caller();
6357 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6361 =head2 switch_to_unix_user(&user-details)
6363 Switches the current process to the UID and group ID from the given list
6364 of user details, which must be in the format returned by getpwnam.
6367 sub switch_to_unix_user
6370 if (!defined($uinfo->[0])) {
6371 # No username given, so just use given GID
6372 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6375 # Use all groups from user
6376 ($(, $)) = ( $uinfo->[3],
6377 "$uinfo->[3] ".join(" ", $uinfo->[3],
6378 &other_groups($uinfo->[0])) );
6381 POSIX::setuid($uinfo->[2]);
6383 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6384 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6388 =head2 eval_as_unix_user(username, &code)
6390 Runs some code fragment with the effective UID and GID switch to that
6391 of the given Unix user, so that file IO takes place with his permissions.
6395 sub eval_as_unix_user
6397 my ($user, $code) = @_;
6398 my @uinfo = getpwnam($user);
6399 if (!scalar(@uinfo)) {
6400 &error("eval_as_unix_user called with invalid user $user");
6402 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6406 local $main::error_must_die = 1;
6413 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6416 return wantarray ? @rv : $rv[0];
6419 =head2 create_user_config_dirs
6421 Creates per-user config directories and sets $user_config_directory and
6422 $user_module_config_directory to them. Also reads per-user module configs
6423 into %userconfig. This should be called by Usermin module scripts that need
6424 to store per-user preferences or other settings.
6427 sub create_user_config_dirs
6429 return if (!$gconfig{'userconfig'});
6430 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6431 return if (!@uinfo || !$uinfo[7]);
6432 &create_missing_homedir(\@uinfo);
6433 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6434 if (!-d $user_config_directory) {
6435 mkdir($user_config_directory, 0700) ||
6436 &error("Failed to create $user_config_directory : $!");
6437 if ($< == 0 && $uinfo[2]) {
6438 chown($uinfo[2], $uinfo[3], $user_config_directory);
6441 if (&get_module_name()) {
6442 $user_module_config_directory = $user_config_directory."/".
6444 if (!-d $user_module_config_directory) {
6445 mkdir($user_module_config_directory, 0700) ||
6446 &error("Failed to create $user_module_config_directory : $!");
6447 if ($< == 0 && $uinfo[2]) {
6448 chown($uinfo[2], $uinfo[3], $user_config_directory);
6452 &read_file_cached("$module_root_directory/defaultuconfig",
6454 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6455 &read_file_cached("$user_module_config_directory/config",
6459 # Export global variables to caller
6460 if ($main::export_to_caller) {
6461 my ($callpkg) = caller();
6462 foreach my $v ('$user_config_directory',
6463 '$user_module_config_directory', '%userconfig') {
6464 my ($vt, $vn) = split('', $v, 2);
6465 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6470 =head2 create_missing_homedir(&uinfo)
6472 If auto homedir creation is enabled, create one for this user if needed.
6473 For internal use only.
6476 sub create_missing_homedir
6479 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6480 # Use has no home dir .. make one
6481 system("mkdir -p ".quotemeta($uinfo->[7]));
6482 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6483 if ($gconfig{'create_homedir_perms'} ne '') {
6484 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6489 =head2 filter_javascript(text)
6491 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6492 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6495 sub filter_javascript
6498 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6499 $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;
6500 $rv =~ s/(javascript:)/x$1/gi;
6501 $rv =~ s/(vbscript:)/x$1/gi;
6505 =head2 resolve_links(path)
6507 Given a path that may contain symbolic links, returns the real path.
6513 $path =~ s/\/+/\//g;
6514 $path =~ s/\/$// if ($path ne "/");
6515 my @p = split(/\/+/, $path);
6517 for(my $i=0; $i<@p; $i++) {
6518 my $sofar = "/".join("/", @p[0..$i]);
6519 my $lnk = readlink($sofar);
6520 if ($lnk eq $sofar) {
6521 # Link to itself! Cannot do anything more really ..
6524 elsif ($lnk =~ /^\//) {
6525 # Link is absolute..
6526 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6530 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6536 =head2 simplify_path(path, bogus)
6538 Given a path, maybe containing elements ".." and "." , convert it to a
6539 clean, absolute form. Returns undef if this is not possible.
6547 my @bits = split(/\/+/, $dir);
6550 foreach my $b (@bits) {
6554 elsif ($b eq "..") {
6556 if (scalar(@fixedbits) == 0) {
6557 # Cannot! Already at root!
6564 push(@fixedbits, $b);
6567 return "/".join('/', @fixedbits);
6570 =head2 same_file(file1, file2)
6572 Returns 1 if two files are actually the same
6577 return 1 if ($_[0] eq $_[1]);
6578 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6579 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6580 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6581 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6582 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6583 return 0 if (!@stat1 || !@stat2);
6584 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6587 =head2 flush_webmin_caches
6589 Clears all in-memory and on-disk caches used by Webmin.
6592 sub flush_webmin_caches
6594 undef(%main::read_file_cache);
6595 undef(%main::acl_hash_cache);
6596 undef(%main::acl_array_cache);
6597 undef(%main::has_command_cache);
6598 undef(@main::list_languages_cache);
6599 undef($main::got_list_usermods_cache);
6600 undef(@main::list_usermods_cache);
6601 undef(%main::foreign_installed_cache);
6602 unlink("$config_directory/module.infos.cache");
6603 &get_all_module_infos();
6606 =head2 list_usermods
6608 Returns a list of additional module restrictions. For internal use in
6614 if (!$main::got_list_usermods_cache) {
6615 @main::list_usermods_cache = ( );
6617 open(USERMODS, "$config_directory/usermin.mods");
6619 if (/^([^:]+):(\+|-|):(.*)/) {
6620 push(@main::list_usermods_cache,
6621 [ $1, $2, [ split(/\s+/, $3) ] ]);
6625 $main::got_list_usermods_cache = 1;
6627 return @main::list_usermods_cache;
6630 =head2 available_usermods(&allmods, &usermods)
6632 Returns a list of modules that are available to the given user, based
6633 on usermod additional/subtractions. For internal use by Usermin only.
6636 sub available_usermods
6638 return @{$_[0]} if (!@{$_[1]});
6640 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6641 my @uinfo = @remote_user_info;
6642 @uinfo = getpwnam($remote_user) if (!@uinfo);
6643 foreach my $u (@{$_[1]}) {
6645 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6648 elsif ($u->[0] =~ /^\@(.*)$/) {
6649 # Check for group membership
6650 my @ginfo = getgrnam($1);
6651 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6652 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6654 elsif ($u->[0] =~ /^\//) {
6655 # Check users and groups in file
6657 open(USERFILE, $u->[0]);
6660 if ($_ eq $remote_user) {
6663 elsif (/^\@(.*)$/) {
6664 my @ginfo = getgrnam($1);
6666 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6667 &indexof($remote_user,
6668 split(/\s+/, $ginfo[3])) >= 0));
6675 if ($u->[1] eq "+") {
6676 map { $mods{$_}++ } @{$u->[2]};
6678 elsif ($u->[1] eq "-") {
6679 map { delete($mods{$_}) } @{$u->[2]};
6683 map { $mods{$_}++ } @{$u->[2]};
6687 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6690 =head2 get_available_module_infos(nocache)
6692 Returns a list of modules available to the current user, based on
6693 operating system support, access control and usermod restrictions. Useful
6694 in themes that need to display a list of modules the user can use.
6695 Each element of the returned array is a hash reference in the same format as
6696 returned by get_module_info.
6699 sub get_available_module_infos
6702 &read_acl(\%acl, \%uacl);
6703 my $risk = $gconfig{'risk_'.$base_remote_user};
6705 foreach my $minfo (&get_all_module_infos($_[0])) {
6706 next if (!&check_os_support($minfo));
6708 # Check module risk level
6709 next if ($risk ne 'high' && $minfo->{'risk'} &&
6710 $minfo->{'risk'} !~ /$risk/);
6714 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6715 !$acl{$base_remote_user,"*"});
6717 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6721 # Check usermod restrictions
6722 my @usermods = &list_usermods();
6723 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6724 &available_usermods(\@rv, \@usermods);
6726 # Check RBAC restrictions
6728 foreach my $m (@rv) {
6729 if (&supports_rbac($m->{'dir'}) &&
6730 &use_rbac_module_acl(undef, $m->{'dir'})) {
6731 local $rbacs = &get_rbac_module_acl($remote_user,
6739 # Module or system doesn't support RBAC
6740 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6746 if (defined(&theme_foreign_available)) {
6747 foreach my $m (@rbacrv) {
6748 if (&theme_foreign_available($m->{'dir'})) {
6757 # Check licence module vetos
6759 if ($main::licence_module) {
6760 foreach my $m (@themerv) {
6761 if (&foreign_call($main::licence_module,
6762 "check_module_licence", $m->{'dir'})) {
6774 =head2 get_visible_module_infos(nocache)
6776 Like get_available_module_infos, but excludes hidden modules from the list.
6777 Each element of the returned array is a hash reference in the same format as
6778 returned by get_module_info.
6781 sub get_visible_module_infos
6784 my $pn = &get_product_name();
6785 return grep { !$_->{'hidden'} &&
6786 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6789 =head2 get_visible_modules_categories(nocache)
6791 Returns a list of Webmin module categories, each of which is a hash ref
6792 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6793 of modules in the category, in the format returned by get_module_info.
6794 Un-used modules are automatically assigned to the 'unused' category, and
6795 those with no category are put into 'others'.
6798 sub get_visible_modules_categories
6801 my @mods = &get_visible_module_infos($nocache);
6803 if (&get_product_name() eq 'webmin') {
6804 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6805 @mods = grep { $_->{'installed'} ne '0' } @mods;
6807 my %cats = &list_categories(\@mods);
6809 foreach my $c (keys %cats) {
6810 my $cat = { 'code' => $c || 'other',
6811 'desc' => $cats{$c} };
6812 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6815 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6816 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6818 # Add un-installed modules in magic category
6819 my $cat = { 'code' => 'unused',
6820 'desc' => $text{'main_unused'},
6822 'modules' => \@unmods };
6828 =head2 is_under_directory(directory, file)
6830 Returns 1 if the given file is under the specified directory, 0 if not.
6831 Symlinks are taken into account in the file to find it's 'real' location.
6834 sub is_under_directory
6836 my ($dir, $file) = @_;
6837 return 1 if ($dir eq "/");
6838 return 0 if ($file =~ /\.\./);
6839 my $ld = &resolve_links($dir);
6841 return &is_under_directory($ld, $file);
6843 my $lp = &resolve_links($file);
6845 return &is_under_directory($dir, $lp);
6847 return 0 if (length($file) < length($dir));
6848 return 1 if ($dir eq $file);
6850 return substr($file, 0, length($dir)) eq $dir;
6853 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6855 Given an absolute URL, returns the host, port, page and ssl flag components.
6856 Relative URLs can also be parsed, if the base information is provided.
6861 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6863 my $ssl = $1 eq 'https';
6864 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6870 elsif ($_[0] =~ /^\/\S*$/) {
6871 # A relative to the server URL
6872 return ($_[1], $_[2], $_[0], $_[4]);
6875 # A relative to the directory URL
6877 $page =~ s/[^\/]+$//;
6878 return ($_[1], $_[2], $page.$_[0], $_[4]);
6882 =head2 check_clicks_function
6884 Returns HTML for a JavaScript function called check_clicks that returns
6885 true when first called, but false subsequently. Useful on onClick for
6886 critical buttons. Deprecated, as this method of preventing duplicate actions
6890 sub check_clicks_function
6895 function check_clicks(form)
6902 for(i=0; i<form.length; i++)
6903 form.elements[i].disabled = true;
6912 =head2 load_entities_map
6914 Returns a hash ref containing mappings between HTML entities (like ouml) and
6915 ascii values (like 246). Mainly for internal use.
6918 sub load_entities_map
6920 if (!%entities_map_cache) {
6922 open(EMAP, "$root_directory/entities_map.txt");
6924 if (/^(\d+)\s+(\S+)/) {
6925 $entities_map_cache{$2} = $1;
6930 return \%entities_map_cache;
6933 =head2 entities_to_ascii(string)
6935 Given a string containing HTML entities like ö and 7, replace them
6936 with their ASCII equivalents.
6939 sub entities_to_ascii
6942 my $emap = &load_entities_map();
6943 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6944 $str =~ s/&#(\d+);/chr($1)/ge;
6948 =head2 get_product_name
6950 Returns either 'webmin' or 'usermin', depending on which program the current
6951 module is in. Useful for modules that can be installed into either.
6954 sub get_product_name
6956 return $gconfig{'product'} if (defined($gconfig{'product'}));
6957 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6962 Returns the character set for the current language, such as iso-8859-1.
6967 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6968 $current_lang_info->{'charset'} ?
6969 $current_lang_info->{'charset'} : $default_charset;
6973 =head2 get_display_hostname
6975 Returns the system's hostname for UI display purposes. This may be different
6976 from the actual hostname if you administrator has configured it so in the
6977 Webmin Configuration module.
6980 sub get_display_hostname
6982 if ($gconfig{'hostnamemode'} == 0) {
6983 return &get_system_hostname();
6985 elsif ($gconfig{'hostnamemode'} == 3) {
6986 return $gconfig{'hostnamedisplay'};
6989 my $h = $ENV{'HTTP_HOST'};
6991 if ($gconfig{'hostnamemode'} == 2) {
6992 $h =~ s/^(www|ftp|mail)\.//i;
6998 =head2 save_module_config([&config], [modulename])
7000 Saves the configuration for some module. The config parameter is an optional
7001 hash reference of names and values to save, which defaults to the global
7002 %config hash. The modulename parameter is the module to update the config
7003 file, which defaults to the current module.
7006 sub save_module_config
7008 my $c = $_[0] || { &get_module_variable('%config') };
7009 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7010 &write_file("$config_directory/$m/config", $c);
7013 =head2 save_user_module_config([&config], [modulename])
7015 Saves the user's Usermin preferences for some module. The config parameter is
7016 an optional hash reference of names and values to save, which defaults to the
7017 global %userconfig hash. The modulename parameter is the module to update the
7018 config file, which defaults to the current module.
7021 sub save_user_module_config
7023 my $c = $_[0] || { &get_module_variable('%userconfig') };
7024 my $m = $_[1] || &get_module_name();
7025 my $ucd = $user_config_directory;
7027 my @uinfo = @remote_user_info ? @remote_user_info
7028 : getpwnam($remote_user);
7029 return if (!@uinfo || !$uinfo[7]);
7030 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7032 &write_file("$ucd/$m/config", $c);
7035 =head2 nice_size(bytes, [min])
7037 Converts a number of bytes into a number followed by a suffix like GB, MB
7038 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7039 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7044 my ($units, $uname);
7045 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7046 $units = 1024*1024*1024*1024;
7049 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7050 $units = 1024*1024*1024;
7053 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7057 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7065 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7067 return $sz." ".$uname;
7070 =head2 get_perl_path
7072 Returns the path to Perl currently in use, such as /usr/bin/perl.
7077 if (open(PERL, "$config_directory/perl-path")) {
7083 return $^X if (-x $^X);
7084 return &has_command("perl");
7087 =head2 get_goto_module([&mods])
7089 Returns the details of a module that the current user should be re-directed
7090 to after logging in, or undef if none. Useful for themes.
7095 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7096 if ($gconfig{'gotomodule'}) {
7097 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7098 return $goto if ($goto);
7100 if (@mods == 1 && $gconfig{'gotoone'}) {
7106 =head2 select_all_link(field, form, [text])
7108 Returns HTML for a 'Select all' link that uses Javascript to select
7109 multiple checkboxes with the same name. The parameters are :
7111 =item field - Name of the checkbox inputs.
7113 =item form - Index of the form on the page.
7115 =item text - Message for the link, defaulting to 'Select all'.
7120 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7121 my ($field, $form, $text) = @_;
7123 $text ||= $text{'ui_selall'};
7124 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7127 =head2 select_invert_link(field, form, text)
7129 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7130 selection on multiple checkboxes with the same name. The parameters are :
7132 =item field - Name of the checkbox inputs.
7134 =item form - Index of the form on the page.
7136 =item text - Message for the link, defaulting to 'Invert selection'.
7139 sub select_invert_link
7141 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7142 my ($field, $form, $text) = @_;
7144 $text ||= $text{'ui_selinv'};
7145 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7148 =head2 select_rows_link(field, form, text, &rows)
7150 Returns HTML for a link that uses Javascript to select rows with particular
7151 values for their checkboxes. The parameters are :
7153 =item field - Name of the checkbox inputs.
7155 =item form - Index of the form on the page.
7157 =item text - Message for the link, de
7159 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7162 sub select_rows_link
7164 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7165 my ($field, $form, $text, $rows) = @_;
7167 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7168 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7169 $js .= "return false;";
7170 return "<a href='#' onClick='$js'>$text</a>";
7173 =head2 check_pid_file(file)
7175 Given a pid file, returns the PID it contains if the process is running.
7180 open(PIDFILE, $_[0]) || return undef;
7181 my $pid = <PIDFILE>;
7183 $pid =~ /^\s*(\d+)/ || return undef;
7184 kill(0, $1) || return undef;
7190 Return the local os-specific library name to this module. For internal use only.
7195 my $mn = &get_module_name();
7196 my $md = &module_root_directory($mn);
7197 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7198 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7200 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7201 return "$mn-$gconfig{'os_type'}-lib.pl";
7203 elsif (-r "$md/$mn-generic-lib.pl") {
7204 return "$mn-generic-lib.pl";
7211 =head2 module_root_directory(module)
7213 Given a module name, returns its root directory. On a typical Webmin install,
7214 all modules are under the same directory - but it is theoretically possible to
7218 sub module_root_directory
7220 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7221 if (@root_directories > 1) {
7222 foreach my $r (@root_directories) {
7228 return "$root_directories[0]/$d";
7231 =head2 list_mime_types
7233 Returns a list of all known MIME types and their extensions, as a list of hash
7234 references with keys :
7236 =item type - The MIME type, like text/plain.
7238 =item exts - A list of extensions, like .doc and .avi.
7240 =item desc - A human-readable description for the MIME type.
7245 if (!@list_mime_types_cache) {
7247 open(MIME, "$root_directory/mime.types");
7251 if (s/#\s*(.*)$//g) {
7254 my ($type, @exts) = split(/\s+/);
7256 push(@list_mime_types_cache, { 'type' => $type,
7263 return @list_mime_types_cache;
7266 =head2 guess_mime_type(filename, [default])
7268 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7269 The optional default parameter sets a default type of use if none is found,
7270 which defaults to application/octet-stream.
7275 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7277 foreach my $t (&list_mime_types()) {
7278 foreach my $e (@{$t->{'exts'}}) {
7279 return $t->{'type'} if (lc($e) eq lc($ext));
7283 return @_ > 1 ? $_[1] : "application/octet-stream";
7286 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7288 Opens a file handle for writing to a temporary file, which will only be
7289 renamed over the real file when the handle is closed. This allows critical
7290 files like /etc/shadow to be updated safely, even if writing fails part way
7291 through due to lack of disk space. The parameters are :
7293 =item handle - File handle to open, as you would use in Perl's open function.
7295 =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.
7297 =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 $! with the error code.
7299 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7301 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7307 # Just getting a temp file
7308 if (!defined($main::open_tempfiles{$_[0]})) {
7309 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7310 my $dir = $1 || "/";
7311 my $tmp = "$dir/$2.webmintmp.$$";
7312 $main::open_tempfiles{$_[0]} = $tmp;
7313 push(@main::temporary_files, $tmp);
7315 return $main::open_tempfiles{$_[0]};
7319 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7320 $fh = &callers_package($fh);
7322 my %gaccess = &get_module_acl(undef, "");
7323 my $db = $gconfig{'debug_what_write'};
7324 if ($file =~ /\r|\n|\0/) {
7325 if ($noerror) { return 0; }
7326 else { &error("Filename contains invalid characters"); }
7328 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7329 # Read-only mode .. veto all writes
7330 print STDERR "vetoing write to $file\n";
7331 return open($fh, ">$null_file");
7333 elsif ($file =~ /^(>|>>|)nul$/i) {
7334 # Write to Windows null device
7335 &webmin_debug_log($1 eq ">" ? "WRITE" :
7336 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7338 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7339 # Writes to /dev/null or TTYs don't need to be handled
7340 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7341 return open($fh, $file);
7343 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7344 &webmin_debug_log("WRITE", $1) if ($db);
7345 # Over-writing a file, via a temp file
7347 $file = &translate_filename($file);
7349 # Open the link target instead
7350 $file = &resolve_links($file);
7353 # Cannot open a directory!
7354 if ($noerror) { return 0; }
7355 else { &error("Cannot write to directory $file"); }
7357 my $tmp = &open_tempfile($file);
7358 my $ex = open($fh, ">$tmp");
7359 if (!$ex && $! =~ /permission/i) {
7360 # Could not open temp file .. try opening actual file
7362 $ex = open($fh, ">$file");
7363 delete($main::open_tempfiles{$file});
7366 $main::open_temphandles{$fh} = $file;
7369 if (!$ex && !$noerror) {
7370 &error(&text("efileopen", $file, $!));
7374 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7375 # Just writing direct to a file
7376 &webmin_debug_log("WRITE", $1) if ($db);
7378 $file = &translate_filename($file);
7379 my @old_attributes = &get_clear_file_attributes($file);
7380 my $ex = open($fh, ">$file");
7381 &reset_file_attributes($file, \@old_attributes);
7382 $main::open_temphandles{$fh} = $file;
7383 if (!$ex && !$noerror) {
7384 &error(&text("efileopen", $file, $!));
7389 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7390 # Appending to a file .. nothing special to do
7391 &webmin_debug_log("APPEND", $1) if ($db);
7393 $file = &translate_filename($file);
7394 my @old_attributes = &get_clear_file_attributes($file);
7395 my $ex = open($fh, ">>$file");
7396 &reset_file_attributes($file, \@old_attributes);
7397 $main::open_temphandles{$fh} = $file;
7398 if (!$ex && !$noerror) {
7399 &error(&text("efileopen", $file, $!));
7404 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7405 # Read mode .. nothing to do here
7406 &webmin_debug_log("READ", $file) if ($db);
7407 $file = &translate_filename($file);
7408 return open($fh, $file);
7410 elsif ($file eq ">" || $file eq ">>") {
7411 my ($package, $filename, $line) = caller;
7412 if ($noerror) { return 0; }
7413 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7416 my ($package, $filename, $line) = caller;
7417 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7422 =head2 close_tempfile(file|handle)
7424 Copies a temp file to the actual file, assuming that all writes were
7425 successful. The handle must have been one passed to open_tempfile.
7431 my $fh = &callers_package($_[0]);
7433 if (defined($file = $main::open_temphandles{$fh})) {
7435 close($fh) || &error(&text("efileclose", $file, $!));
7436 delete($main::open_temphandles{$fh});
7437 return &close_tempfile($file);
7439 elsif (defined($main::open_tempfiles{$_[0]})) {
7441 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7442 my @st = stat($_[0]);
7443 if (&is_selinux_enabled() && &has_command("chcon")) {
7444 # Set original security context
7445 system("chcon --reference=".quotemeta($_[0]).
7446 " ".quotemeta($main::open_tempfiles{$_[0]}).
7447 " >/dev/null 2>&1");
7449 my @old_attributes = &get_clear_file_attributes($_[0]);
7450 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7452 # Set original permissions and ownership
7453 chmod($st[2], $_[0]);
7454 chown($st[4], $st[5], $_[0]);
7456 &reset_file_attributes($_[0], \@old_attributes);
7457 delete($main::open_tempfiles{$_[0]});
7458 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7459 if ($main::open_templocks{$_[0]}) {
7460 &unlock_file($_[0]);
7461 delete($main::open_templocks{$_[0]});
7466 # Must be closing a handle not associated with a file
7472 =head2 print_tempfile(handle, text, ...)
7474 Like the normal print function, but calls &error on failure. Useful when
7475 combined with open_tempfile, to ensure that a criticial file is never
7476 only partially written.
7481 my ($fh, @args) = @_;
7482 $fh = &callers_package($fh);
7483 (print $fh @args) || &error(&text("efilewrite",
7484 $main::open_temphandles{$fh} || $fh, $!));
7487 =head2 is_selinux_enabled
7489 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7492 sub is_selinux_enabled
7494 if (!defined($main::selinux_enabled_cache)) {
7496 if ($gconfig{'os_type'} !~ /-linux$/) {
7497 # Not on linux, so no way
7498 $main::selinux_enabled_cache = 0;
7500 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7501 # Use global config file
7502 $main::selinux_enabled_cache =
7503 $seconfig{'SELINUX'} eq 'disabled' ||
7504 !$seconfig{'SELINUX'} ? 0 : 1;
7507 # Use selinuxenabled command
7508 #$selinux_enabled_cache =
7509 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7510 $main::selinux_enabled_cache = 0;
7513 return $main::selinux_enabled_cache;
7516 =head2 get_clear_file_attributes(file)
7518 Finds file attributes that may prevent writing, clears them and returns them
7519 as a list. May call error. Mainly for internal use by open_tempfile and
7523 sub get_clear_file_attributes
7527 if ($gconfig{'chattr'}) {
7528 # Get original immutable bit
7529 my $out = &backquote_command(
7530 "lsattr ".quotemeta($file)." 2>/dev/null");
7532 $out =~ s/\s\S+\n//;
7533 @old_attributes = grep { $_ ne '-' } split(//, $out);
7535 if (&indexof("i", @old_attributes) >= 0) {
7536 my $err = &backquote_logged(
7537 "chattr -i ".quotemeta($file)." 2>&1");
7539 &error("Failed to remove immutable bit on ".
7544 return @old_attributes;
7547 =head2 reset_file_attributes(file, &attributes)
7549 Put back cleared attributes on some file. May call error. Mainly for internal
7550 use by close_tempfile.
7553 sub reset_file_attributes
7555 my ($file, $old_attributes) = @_;
7556 if (&indexof("i", @$old_attributes) >= 0) {
7557 my $err = &backquote_logged(
7558 "chattr +i ".quotemeta($file)." 2>&1");
7560 &error("Failed to restore immutable bit on ".
7566 =head2 cleanup_tempnames
7568 Remove all temporary files generated using transname. Typically only called
7569 internally when a Webmin script exits.
7572 sub cleanup_tempnames
7574 foreach my $t (@main::temporary_files) {
7577 @main::temporary_files = ( );
7580 =head2 open_lock_tempfile([handle], file, [no-error])
7582 Returns a temporary file for writing to some actual file, and also locks it.
7583 Effectively the same as calling lock_file and open_tempfile on the same file,
7584 but calls the unlock for you automatically when it is closed.
7587 sub open_lock_tempfile
7589 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7590 $fh = &callers_package($fh);
7591 my $lockfile = $file;
7592 $lockfile =~ s/^[^\/]*//;
7593 if ($lockfile =~ /^\//) {
7594 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7596 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7601 $main::end_exit_status ||= $?;
7602 if ($$ == $main::initial_process_id) {
7603 # Exiting from initial process
7604 &cleanup_tempnames();
7605 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7606 $main::debug_log_start_module eq &get_module_name()) {
7607 my $len = time() - $main::debug_log_start_time;
7608 &webmin_debug_log("STOP", "runtime=$len");
7609 $main::debug_log_start_time = 0;
7611 if (!$ENV{'SCRIPT_NAME'} &&
7612 $main::initial_module_name eq &get_module_name()) {
7613 # In a command-line script - call the real exit, so that the
7614 # exit status gets properly propogated. In some cases this
7615 # was not happening.
7616 exit($main::end_exit_status);
7621 =head2 month_to_number(month)
7623 Converts a month name like feb to a number like 1.
7628 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7631 =head2 number_to_month(number)
7633 Converts a number like 1 to a month name like Feb.
7638 return ucfirst($number_to_month_map{$_[0]});
7641 =head2 get_rbac_module_acl(user, module)
7643 Returns a hash reference of RBAC overrides ACLs for some user and module.
7644 May return undef if none exist (indicating access denied), or the string *
7645 if full access is granted.
7648 sub get_rbac_module_acl
7650 my ($user, $mod) = @_;
7651 eval "use Authen::SolarisRBAC";
7652 return undef if ($@);
7655 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7656 # Automagic webmin.modulename.admin authorization exists .. allow access
7658 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7659 %rv = ( 'noconfig' => 1 );
7666 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7670 my ($auths, $acls) = split(/\s+/, $_);
7671 my @auths = split(/,/, $auths);
7673 my ($merge) = ($acls =~ s/^\+//);
7675 if ($auths eq "*") {
7676 # These ACLs apply to all RBAC users.
7677 # Only if there is some that match a specific authorization
7678 # later will they be used though.
7681 # Check each of the RBAC authorizations
7682 foreach my $a (@auths) {
7683 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7688 $foundany++ if ($gotall);
7691 # Found an RBAC authorization - return the ACLs
7692 return "*" if ($acls eq "*");
7693 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7695 # Just add to current set
7696 foreach my $a (keys %acl) {
7707 return !$foundany ? undef : %rv ? \%rv : undef;
7710 =head2 supports_rbac([module])
7712 Returns 1 if RBAC client support is available, such as on Solaris.
7717 return 0 if ($gconfig{'os_type'} ne 'solaris');
7718 eval "use Authen::SolarisRBAC";
7721 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7726 =head2 use_rbac_module_acl(user, module)
7728 Returns 1 if some user should use RBAC to get permissions for a module
7731 sub use_rbac_module_acl
7733 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7734 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7735 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7736 my %access = &get_module_acl($u, $m, 1);
7737 return $access{'rbac'} ? 1 : 0;
7740 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7742 Runs some command, possibly feeding it input and capturing output to the
7743 give files or scalar references. The parameters are :
7745 =item command - Full command to run, possibly including shell meta-characters.
7747 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7749 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7751 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7753 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7755 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7760 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7761 if (&is_readonly_mode() && !$safe) {
7762 print STDERR "Vetoing command $_[0]\n";
7766 $cmd = &translate_command($cmd);
7768 # Use ` operator where possible
7769 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7770 if (!$stdin && ref($stdout) && !$stderr) {
7771 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7772 $$stdout = `$cmd 2>$null_file`;
7775 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7776 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7777 $$stdout = `$cmd 2>&1`;
7780 elsif (!$stdin && !$stdout && !$stderr) {
7781 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7782 return system("$cmd >$null_file 2>$null_file <$null_file");
7786 $| = 1; # needed on some systems to flush before forking
7787 pipe(EXECSTDINr, EXECSTDINw);
7788 pipe(EXECSTDOUTr, EXECSTDOUTw);
7789 pipe(EXECSTDERRr, EXECSTDERRw);
7791 if (!($pid = fork())) {
7795 open(STDIN, "<&EXECSTDINr");
7796 open(STDOUT, ">&EXECSTDOUTw");
7797 if (ref($stderr) && $stderr eq $stdout) {
7798 open(STDERR, ">&EXECSTDOUTw");
7801 open(STDERR, ">&EXECSTDERRw");
7808 my $fullcmd = "($cmd)";
7809 if ($stdin && !ref($stdin)) {
7810 $fullcmd .= " <$stdin";
7812 if ($stdout && !ref($stdout)) {
7813 $fullcmd .= " >$stdout";
7815 if ($stderr && !ref($stderr)) {
7816 if ($stderr eq $stdout) {
7817 $fullcmd .= " 2>&1";
7820 $fullcmd .= " 2>$stderr";
7823 if ($gconfig{'os_type'} eq 'windows') {
7827 exec("/bin/sh", "-c", $fullcmd);
7829 print "Exec failed : $!\n";
7836 # Feed input and capture output
7838 if ($stdin && ref($stdin)) {
7839 print EXECSTDINw $$stdin;
7842 if ($stdout && ref($stdout)) {
7844 while(<EXECSTDOUTr>) {
7849 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7851 while(<EXECSTDERRr>) {
7862 =head2 open_readfile(handle, file)
7864 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7865 exactly the same as Perl's open function.
7870 my ($fh, $file) = @_;
7871 $fh = &callers_package($fh);
7872 my $realfile = &translate_filename($file);
7873 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7874 return open($fh, "<".$realfile);
7877 =head2 open_execute_command(handle, command, output?, safe?)
7879 Runs some command, with the specified file handle set to either write to it if
7880 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7881 indicates if the command modifies the state of the system or not.
7884 sub open_execute_command
7886 my ($fh, $cmd, $mode, $safe) = @_;
7887 $fh = &callers_package($fh);
7888 my $realcmd = &translate_command($cmd);
7889 if (&is_readonly_mode() && !$safe) {
7890 # Don't actually run it
7891 print STDERR "vetoing command $cmd\n";
7894 return open($fh, ">$null_file");
7897 return open($fh, $null_file);
7901 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7902 if ($gconfig{'debug_what_cmd'});
7904 return open($fh, "| $cmd");
7906 elsif ($mode == 1) {
7907 return open($fh, "$cmd 2>$null_file |");
7909 elsif ($mode == 2) {
7910 return open($fh, "$cmd 2>&1 |");
7914 =head2 translate_filename(filename)
7916 Applies all relevant registered translation functions to a filename. Mostly
7917 for internal use, and typically does nothing.
7920 sub translate_filename
7922 my ($realfile) = @_;
7923 my @funcs = grep { $_->[0] eq &get_module_name() ||
7924 !defined($_->[0]) } @main::filename_callbacks;
7925 foreach my $f (@funcs) {
7927 $realfile = &$func($realfile, @{$f->[2]});
7932 =head2 translate_command(filename)
7934 Applies all relevant registered translation functions to a command. Mostly
7935 for internal use, and typically does nothing.
7938 sub translate_command
7941 my @funcs = grep { $_->[0] eq &get_module_name() ||
7942 !defined($_->[0]) } @main::command_callbacks;
7943 foreach my $f (@funcs) {
7945 $realcmd = &$func($realcmd, @{$f->[2]});
7950 =head2 register_filename_callback(module|undef, &function, &args)
7952 Registers some function to be called when the specified module (or all
7953 modules) tries to open a file for reading and writing. The function must
7954 return the actual file to open. This allows you to override which files
7955 other code actually operates on, via the translate_filename function.
7958 sub register_filename_callback
7960 my ($mod, $func, $args) = @_;
7961 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7964 =head2 register_command_callback(module|undef, &function, &args)
7966 Registers some function to be called when the specified module (or all
7967 modules) tries to execute a command. The function must return the actual
7968 command to run. This allows you to override which commands other other code
7969 actually runs, via the translate_command function.
7972 sub register_command_callback
7974 my ($mod, $func, $args) = @_;
7975 push(@main::command_callbacks, [ $mod, $func, $args ]);
7978 =head2 capture_function_output(&function, arg, ...)
7980 Captures output that some function prints to STDOUT, and returns it. Useful
7981 for functions outside your control that print data when you really want to
7982 manipulate it before output.
7985 sub capture_function_output
7987 my ($func, @args) = @_;
7988 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
7989 my $old = select(SOCKET1);
7990 my @rv = &$func(@args);
7999 return wantarray ? ($out, \@rv) : $out;
8002 =head2 capture_function_output_tempfile(&function, arg, ...)
8004 Behaves the same as capture_function_output, but uses a temporary file
8005 to avoid buffer full problems.
8008 sub capture_function_output_tempfile
8010 my ($func, @args) = @_;
8011 my $temp = &transname();
8012 open(BUFFER, ">$temp");
8013 my $old = select(BUFFER);
8014 my @rv = &$func(@args);
8017 my $out = &read_file_contents($temp);
8018 &unlink_file($temp);
8019 return wantarray ? ($out, \@rv) : $out;
8022 =head2 modules_chooser_button(field, multiple, [form])
8024 Returns HTML for a button for selecting one or many Webmin modules.
8025 field - Name of the HTML field to place the module names into.
8026 multiple - Set to 1 if multiple modules can be selected.
8027 form - Index of the form on the page.
8030 sub modules_chooser_button
8032 return &theme_modules_chooser_button(@_)
8033 if (defined(&theme_modules_chooser_button));
8034 my $form = defined($_[2]) ? $_[2] : 0;
8035 my $w = $_[1] ? 700 : 500;
8037 if ($_[1] && $gconfig{'db_sizemodules'}) {
8038 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8040 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8041 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8043 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";
8046 =head2 substitute_template(text, &hash)
8048 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8049 the text replaces it with the value of the hash key foo. Also supports blocks
8050 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8051 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8054 sub substitute_template
8056 # Add some extra fixed parameters to the hash
8057 my %hash = %{$_[1]};
8058 $hash{'hostname'} = &get_system_hostname();
8059 $hash{'webmin_config'} = $config_directory;
8060 $hash{'webmin_etc'} = $config_directory;
8061 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8062 $hash{'webmin_var'} = $var_directory;
8064 # Add time-based parameters, for use in DNS
8065 $hash{'current_time'} = time();
8066 my @tm = localtime($hash{'current_time'});
8067 $hash{'current_year'} = $tm[5]+1900;
8068 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8069 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8070 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8071 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8072 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8074 # Actually do the substition
8076 foreach my $s (keys %hash) {
8077 next if ($s eq ''); # Prevent just $ from being subbed
8080 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8081 $rv =~ s/\$\Q$us\E/$sv/g;
8083 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8084 # and ${IF}..${ENDIF} with value
8085 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8086 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8088 # Replace $IF..$ELSE..$ENDIF block with first value,
8089 # and $IF..$ENDIF with value
8090 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8091 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8093 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8094 # matching, nothing if not
8095 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8096 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8098 # Replace $IFEQ..$ENDIFEQ block with first value if
8099 # matching, nothing if not
8100 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8101 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8104 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8105 # and ${IF}..${ENDIF} with nothing
8106 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8107 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8109 # Replace $IF..$ELSE..$ENDIF block with second value,
8110 # and $IF..$ENDIF with nothing
8111 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8112 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8114 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8115 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8116 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8120 # Now assume any $IF blocks whose variables are not present in the hash
8121 # evaluate to false.
8122 # $IF...$ELSE x $ENDIF => x
8123 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8124 # $IF...x...$ENDIF => (nothing)
8125 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8126 # ${var} => (nothing)
8127 $rv =~ s/\$\{[A-Z]+\}//g;
8132 =head2 running_in_zone
8134 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8135 disable module and features that are not appropriate, like those that modify
8136 mounted filesystems.
8141 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8142 $gconfig{'os_version'} < 10);
8143 my $zn = `zonename 2>$null_file`;
8145 return $zn && $zn ne "global";
8148 =head2 running_in_vserver
8150 Returns 1 if the current Webmin instance is running in a Linux VServer.
8151 Used to disable modules and features that are not appropriate.
8154 sub running_in_vserver
8156 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8159 open(MTAB, "/etc/mtab");
8161 my ($dev, $mp) = split(/\s+/, $_);
8162 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8171 =head2 running_in_xen
8173 Returns 1 if Webmin is running inside a Xen instance, by looking
8174 at /proc/xen/capabilities.
8179 return 0 if (!-r "/proc/xen/capabilities");
8180 my $cap = &read_file_contents("/proc/xen/capabilities");
8181 return $cap =~ /control_d/ ? 0 : 1;
8184 =head2 running_in_openvz
8186 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8187 at /proc/vz/veinfo for a non-zero line.
8190 sub running_in_openvz
8192 return 0 if (!-r "/proc/vz/veinfo");
8193 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8194 return 0 if (!$lref || !@$lref);
8195 foreach my $l (@$lref) {
8197 my @ll = split(/\s+/, $l);
8198 return 0 if ($ll[0] eq '0');
8203 =head2 list_categories(&modules, [include-empty])
8205 Returns a hash mapping category codes to names, including any custom-defined
8206 categories. The modules parameter must be an array ref of module hash objects,
8207 as returned by get_all_module_infos.
8212 my ($mods, $empty) = @_;
8213 my (%cats, %catnames);
8214 &read_file("$config_directory/webmin.catnames", \%catnames);
8215 foreach my $o (@lang_order_list) {
8216 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8221 foreach my $m (@$mods) {
8222 my $c = $m->{'category'};
8223 next if ($cats{$c});
8224 if (defined($catnames{$c})) {
8225 $cats{$c} = $catnames{$c};
8227 elsif ($text{"category_$c"}) {
8228 $cats{$c} = $text{"category_$c"};
8231 # try to get category name from module ..
8232 my %mtext = &load_language($m->{'dir'});
8233 if ($mtext{"category_$c"}) {
8234 $cats{$c} = $mtext{"category_$c"};
8237 $c = $m->{'category'} = "";
8238 $cats{$c} = $text{"category_$c"};
8245 =head2 is_readonly_mode
8247 Returns 1 if the current user is in read-only mode, and thus all writes
8248 to files and command execution should fail.
8251 sub is_readonly_mode
8253 if (!defined($main::readonly_mode_cache)) {
8254 my %gaccess = &get_module_acl(undef, "");
8255 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8257 return $main::readonly_mode_cache;
8260 =head2 command_as_user(user, with-env?, command, ...)
8262 Returns a command to execute some command as the given user, using the
8263 su statement. If on Linux, the /bin/sh shell is forced in case the user
8264 does not have a valid shell. If with-env is set to 1, the -s flag is added
8265 to the su command to read the user's .profile or .bashrc file.
8270 my ($user, $env, @args) = @_;
8271 my @uinfo = getpwnam($user);
8272 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8273 # User shell doesn't appear to be valid
8274 if ($gconfig{'os_type'} =~ /-linux$/) {
8275 # Use -s /bin/sh to force it
8276 $shellarg = " -s /bin/sh";
8278 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8279 $gconfig{'os_type'} eq 'solaris' &&
8280 $gconfig{'os_version'} >= 11 ||
8281 $gconfig{'os_type'} eq 'macos') {
8282 # Use -m and force /bin/sh
8283 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8287 my $rv = "su".($env ? " -" : "").$shellarg.
8288 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8292 =head2 list_osdn_mirrors(project, file)
8294 This function is now deprecated in favor of letting sourceforge just
8295 redirect to the best mirror, and now just returns their primary download URL.
8298 sub list_osdn_mirrors
8300 my ($project, $file) = @_;
8301 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8303 'mirror' => 'downloads' } );
8306 =head2 convert_osdn_url(url)
8308 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8309 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8310 to a real URL on the sourceforge download redirector.
8313 sub convert_osdn_url
8316 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8317 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8318 # Always use the Sourceforge mail download URL, which does
8319 # a location-based redirect for us
8320 my ($project, $file) = ($1, $2);
8321 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8323 return wantarray ? ( $url, 0 ) : $url;
8326 # Some other source .. don't change
8327 return wantarray ? ( $url, 2 ) : $url;
8331 =head2 get_current_dir
8333 Returns the directory the current process is running in.
8339 if ($gconfig{'os_type'} eq 'windows') {
8352 =head2 supports_users
8354 Returns 1 if the current OS supports Unix user concepts and functions like
8355 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8361 return $gconfig{'os_type'} ne 'windows';
8364 =head2 supports_symlinks
8366 Returns 1 if the current OS supports symbolic and hard links. This will not
8367 be the case on Windows.
8370 sub supports_symlinks
8372 return $gconfig{'os_type'} ne 'windows';
8375 =head2 quote_path(path)
8377 Returns a path with safe quoting for the current operating system.
8383 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8384 # Windows only supports "" style quoting
8388 return quotemeta($path);
8392 =head2 get_windows_root
8394 Returns the base windows system directory, like c:/windows.
8397 sub get_windows_root
8399 if ($ENV{'SystemRoot'}) {
8400 my $rv = $ENV{'SystemRoot'};
8405 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8409 =head2 read_file_contents(file)
8411 Given a filename, returns its complete contents as a string. Effectively
8412 the same as the Perl construct `cat file`.
8415 sub read_file_contents
8417 &open_readfile(FILE, $_[0]) || return undef;
8424 =head2 unix_crypt(password, salt)
8426 Performs Unix encryption on a password, using the built-in crypt function or
8427 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8428 must be either an already-hashed password, or a two-character alpha-numeric
8434 my ($pass, $salt) = @_;
8435 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8436 my $rv = eval "crypt(\$pass, \$salt)";
8438 return $rv if ($rv && !$@);
8439 eval "use Crypt::UnixCrypt";
8441 return Crypt::UnixCrypt::crypt($pass, $salt);
8444 &error("Failed to encrypt password : $err");
8448 =head2 split_quoted_string(string)
8450 Given a string like I<foo "bar baz" quux>, returns the array :
8454 sub split_quoted_string
8458 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8459 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8460 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8467 =head2 write_to_http_cache(url, file|&data)
8469 Updates the Webmin cache with the contents of the given file, possibly also
8470 clearing out old data. Mainly for internal use by http_download.
8473 sub write_to_http_cache
8475 my ($url, $file) = @_;
8476 return 0 if (!$gconfig{'cache_size'});
8478 # Don't cache downloads that look dynamic
8479 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8483 # Check if the current module should do caching
8484 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8485 # Caching all except some modules
8486 my @mods = split(/\s+/, $1);
8487 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8489 elsif ($gconfig{'cache_mods'}) {
8490 # Only caching some modules
8491 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8492 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8498 $size = length($$file);
8501 my @st = stat($file);
8505 if ($size > $gconfig{'cache_size'}) {
8506 # Bigger than the whole cache - so don't save it
8511 $cfile = "$main::http_cache_directory/$cfile";
8513 # See how much we have cached currently, clearing old files
8515 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8516 opendir(CACHEDIR, $main::http_cache_directory);
8517 foreach my $f (readdir(CACHEDIR)) {
8518 next if ($f eq "." || $f eq "..");
8519 my $path = "$main::http_cache_directory/$f";
8520 my @st = stat($path);
8521 if ($gconfig{'cache_days'} &&
8522 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8523 # This file is too old .. trash it
8528 push(@cached, [ $path, $st[7], $st[9] ]);
8532 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8533 while($total+$size > $gconfig{'cache_size'} && @cached) {
8534 # Cache is too big .. delete some files until the new one will fit
8535 unlink($cached[0]->[0]);
8536 $total -= $cached[0]->[1];
8540 # Finally, write out the new file
8542 &open_tempfile(CACHEFILE, ">$cfile");
8543 &print_tempfile(CACHEFILE, $$file);
8544 &close_tempfile(CACHEFILE);
8547 my ($ok, $err) = ©_source_dest($file, $cfile);
8553 =head2 check_in_http_cache(url)
8555 If some URL is in the cache and valid, return the filename for it. Mainly
8556 for internal use by http_download.
8559 sub check_in_http_cache
8562 return undef if (!$gconfig{'cache_size'});
8564 # Check if the current module should do caching
8565 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8566 # Caching all except some modules
8567 my @mods = split(/\s+/, $1);
8568 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8570 elsif ($gconfig{'cache_mods'}) {
8571 # Only caching some modules
8572 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8573 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8578 $cfile = "$main::http_cache_directory/$cfile";
8579 my @st = stat($cfile);
8580 return undef if (!@st || !$st[7]);
8581 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8586 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8591 =head2 supports_javascript
8593 Returns 1 if the current browser is assumed to support javascript.
8596 sub supports_javascript
8598 if (defined(&theme_supports_javascript)) {
8599 return &theme_supports_javascript();
8601 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8604 =head2 get_module_name
8606 Returns the name of the Webmin module that called this function. For internal
8607 use only by other API functions.
8612 return &get_module_variable('$module_name');
8615 =head2 get_module_variable(name, [ref])
8617 Returns the value of some variable which is set in the caller's context, if
8618 using the new WebminCore package. For internal use only.
8621 sub get_module_variable
8623 my ($v, $wantref) = @_;
8624 my $slash = $wantref ? "\\" : "";
8625 my $thispkg = &web_libs_package();
8626 if ($thispkg eq 'WebminCore') {
8627 my ($vt, $vn) = split('', $v, 2);
8629 for(my $i=0; ($callpkg) = caller($i); $i++) {
8630 last if ($callpkg ne $thispkg);
8632 return eval "${slash}${vt}${callpkg}::${vn}";
8634 return eval "${slash}${v}";
8637 =head2 clear_time_locale()
8639 Temporarily force the locale to C, until reset_time_locale is called. This is
8640 useful if your code is going to call C<strftime> from the POSIX package, and
8641 you want to ensure that the output is in a consistent format.
8644 sub clear_time_locale
8646 if ($main::clear_time_locale_count == 0) {
8649 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8650 POSIX::setlocale(POSIX::LC_TIME, "C");
8653 $main::clear_time_locale_count++;
8656 =head2 reset_time_locale()
8658 Revert the locale to whatever it was before clear_time_locale was called
8661 sub reset_time_locale
8663 if ($main::clear_time_locale_count == 1) {
8665 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8666 $main::clear_time_locale_old = undef;
8669 $main::clear_time_locale_count--;
8672 =head2 callers_package(filehandle)
8674 Convert a non-module filehandle like FOO to one qualified with the
8675 caller's caller's package, like fsdump::FOO. For internal use only.
8681 my $callpkg = (caller(1))[0];
8682 my $thispkg = &web_libs_package();
8683 if (!ref($fh) && $fh !~ /::/ &&
8684 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8685 $fh = $callpkg."::".$fh;
8690 =head2 web_libs_package()
8692 Returns the package this code is in. We can't always trust __PACKAGE__. For
8696 sub web_libs_package
8698 if ($called_from_webmin_core) {
8699 return "WebminCore";
8704 $done_web_lib_funcs = 1;