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 $main::no_miniserv_userdb = 1;
1318 my $msg = join("", @_);
1319 $msg =~ s/<[^>]*>//g;
1320 if (!$main::error_must_die) {
1321 print STDERR "Error: ",$msg,"\n";
1323 &load_theme_library();
1324 if ($main::error_must_die) {
1325 if ($gconfig{'error_stack'}) {
1326 print STDERR "Error: ",$msg,"\n";
1327 for(my $i=0; my @stack = caller($i); $i++) {
1328 print STDERR "File: $stack[1] Line: $stack[2] ",
1329 "Function: $stack[3]\n";
1334 elsif (!$ENV{'REQUEST_METHOD'}) {
1335 # Show text-only error
1336 print STDERR "$text{'error'}\n";
1337 print STDERR "-----\n";
1338 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1340 print STDERR "-----\n";
1341 if ($gconfig{'error_stack'}) {
1343 print STDERR $text{'error_stack'},"\n";
1344 for(my $i=0; my @stack = caller($i); $i++) {
1345 print STDERR &text('error_stackline',
1346 $stack[1], $stack[2], $stack[3]),"\n";
1351 elsif (defined(&theme_error)) {
1355 &header($text{'error'}, "");
1357 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1359 if ($gconfig{'error_stack'}) {
1361 print "<h3>$text{'error_stack'}</h3>\n";
1363 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1364 "<td><b>$text{'error_line'}</b></td> ",
1365 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1366 for($i=0; my @stack = caller($i); $i++) {
1368 print "<td>$stack[1]</td>\n";
1369 print "<td>$stack[2]</td>\n";
1370 print "<td>$stack[3]</td>\n";
1376 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1377 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1383 &unlock_all_files();
1384 &cleanup_tempnames();
1388 =head2 popup_error([message]+)
1390 This function is almost identical to error, but displays the message with HTML
1391 headers suitable for a popup window.
1396 $main::no_miniserv_userdb = 1;
1397 &load_theme_library();
1398 if ($main::error_must_die) {
1401 elsif (defined(&theme_popup_error)) {
1402 &theme_popup_error(@_);
1405 &popup_header($text{'error'}, "");
1406 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1409 &unlock_all_files();
1410 &cleanup_tempnames();
1414 =head2 error_setup(message)
1416 Registers a message to be prepended to all error messages displayed by the
1422 $main::whatfailed = $_[0];
1425 =head2 wait_for(handle, regexp, regexp, ...)
1427 Reads from the input stream until one of the regexps matches, and returns the
1428 index of the matching regexp, or -1 if input ended before any matched. This is
1429 very useful for parsing the output of interactive programs, and can be used with
1430 a two-way pipe to feed input to a program in response to output matched by
1433 If the matching regexp contains bracketed sub-expressions, their values will
1434 be placed in the global array @matches, indexed starting from 1. You cannot
1435 use the Perl variables $1, $2 and so on to capture matches.
1439 $rv = wait_for($loginfh, "username:");
1441 error("Didn't get username prompt");
1443 print $loginfh "joe\n";
1444 $rv = wait_for($loginfh, "password:");
1446 error("Didn't get password prompt");
1448 print $loginfh "smeg\n";
1453 my ($c, $i, $sw, $rv, $ha);
1454 undef($wait_for_input);
1455 if ($wait_for_debug) {
1456 print STDERR "wait_for(",join(",", @_),")\n";
1458 $ha = &callers_package($_[0]);
1459 if ($wait_for_debug) {
1460 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1465 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1466 " \$wait_for_input .= \$c;\n";
1467 if ($wait_for_debug) {
1468 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1470 for($i=1; $i<@_; $i++) {
1471 $sw = $i>1 ? "elsif" : "if";
1472 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1475 " if (defined(\$hit)) {\n".
1476 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1482 &error("wait_for error : $@\n");
1487 =head2 fast_wait_for(handle, string, string, ...)
1489 This function behaves very similar to wait_for (documented above), but instead
1490 of taking regular expressions as parameters, it takes strings. As soon as the
1491 input contains one of them, it will return the index of the matching string.
1492 If the input ends before any match, it returns -1.
1497 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1498 for($i=1; $i<@_; $i++) {
1499 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1503 if (($c = getc($ha)) eq "") {
1504 &error("fast_wait_for read error : $!");
1507 if (length($inp) > $maxlen) {
1508 $inp = substr($inp, length($inp)-$maxlen);
1510 $inpl = length($inp);
1511 for($i=1; $i<@_; $i++) {
1512 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1519 =head2 has_command(command)
1521 Returns the full path to the executable if some command is in the path, or
1522 undef if not found. If the given command is already an absolute path and
1523 exists, then the same path will be returned.
1528 if (!$_[0]) { return undef; }
1529 if (exists($main::has_command_cache{$_[0]})) {
1530 return $main::has_command_cache{$_[0]};
1533 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1534 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1535 # Absolute path given - just use it
1536 my $t = &translate_filename($_[0]);
1537 $rv = (-x $t && !-d _) ? $_[0] : undef;
1540 # Check each directory in the path
1542 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1543 next if ($donedir{$d}++);
1544 $d =~ s/$slash$// if ($d ne $slash);
1545 my $t = &translate_filename("$d/$_[0]");
1546 if (-x $t && !-d _) {
1547 $rv = $d.$slash.$_[0];
1550 if ($gconfig{'os_type'} eq 'windows') {
1551 foreach my $sfx (".exe", ".com", ".bat") {
1552 my $t = &translate_filename("$d/$_[0]").$sfx;
1553 if (-r $t && !-d _) {
1554 $rv = $d.$slash.$_[0].$sfx;
1561 $main::has_command_cache{$_[0]} = $rv;
1565 =head2 make_date(seconds, [date-only], [fmt])
1567 Converts a Unix date/time in seconds to a human-readable form, by default
1568 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1570 =item seconds - Unix time is seconds to convert.
1572 =item date-only - If set to 1, exclude the time from the returned string.
1574 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1579 my ($secs, $only, $fmt) = @_;
1580 my @tm = localtime($secs);
1583 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1585 if ($fmt eq 'dd/mon/yyyy') {
1586 $date = sprintf "%2.2d/%s/%4.4d",
1587 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1589 elsif ($fmt eq 'dd/mm/yyyy') {
1590 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1592 elsif ($fmt eq 'mm/dd/yyyy') {
1593 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1595 elsif ($fmt eq 'yyyy/mm/dd') {
1596 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1598 elsif ($fmt eq 'd. mon yyyy') {
1599 $date = sprintf "%d. %s %4.4d",
1600 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1602 elsif ($fmt eq 'dd.mm.yyyy') {
1603 $date = sprintf "%2.2d.%2.2d.%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1605 elsif ($fmt eq 'yyyy-mm-dd') {
1606 $date = sprintf "%4.4d-%2.2d-%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1609 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1614 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1616 Return HTML for a button that pops up a file chooser when clicked, and places
1617 the selected filename into another HTML field. The parameters are :
1619 =item input - Name of the form field to store the filename in.
1621 =item type - 0 for file or directory chooser, or 1 for directory only.
1623 =item form - Index of the form containing the button.
1625 =item chroot - If set to 1, the chooser will be limited to this directory.
1627 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1630 sub file_chooser_button
1632 return &theme_file_chooser_button(@_)
1633 if (defined(&theme_file_chooser_button));
1634 my $form = defined($_[2]) ? $_[2] : 0;
1635 my $chroot = defined($_[3]) ? $_[3] : "/";
1636 my $add = int($_[4]);
1637 my ($w, $h) = (400, 300);
1638 if ($gconfig{'db_sizefile'}) {
1639 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1641 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";
1644 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1646 Returns HTML for a button that will popup a chooser window of some kind. The
1649 =item url - Base URL of the popup window's contents
1651 =item width - Width of the window in pixels
1653 =item height - Height in pixels
1655 =item scrollbars - Set to 1 if the window should have scrollbars
1657 The field-mappings parameter is an array ref of array refs containing
1659 =item - Attribute to assign field to in the popup window
1661 =item - Form field name
1663 =item - CGI parameter to URL for value, if any
1666 sub popup_window_button
1668 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1669 my ($url, $w, $h, $scroll, $fields) = @_;
1670 my $scrollyn = $scroll ? "yes" : "no";
1671 my $rv = "<input type=button onClick='";
1672 foreach my $m (@$fields) {
1673 $rv .= "$m->[0] = form.$m->[1]; ";
1675 my $sep = $url =~ /\?/ ? "&" : "?";
1676 $rv .= "chooser = window.open(\"$url\"";
1677 foreach my $m (@$fields) {
1679 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1683 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1684 foreach my $m (@$fields) {
1685 $rv .= "chooser.$m->[0] = $m->[0]; ";
1686 $rv .= "window.$m->[0] = $m->[0]; ";
1688 $rv .= "' value=\"...\">";
1692 =head2 read_acl(&user-module-hash, &user-list-hash)
1694 Reads the Webmin acl file into the given hash references. The first is indexed
1695 by a combined key of username,module , with the value being set to 1 when
1696 the user has access to that module. The second is indexed by username, with
1697 the value being an array ref of allowed modules.
1699 This function is deprecated in favour of foreign_available, which performs a
1700 more comprehensive check of module availability.
1705 if (!%main::acl_hash_cache) {
1706 # Read from local files
1708 open(ACL, &acl_filename());
1710 if (/^([^:]+):\s*(.*)/) {
1712 my @mods = split(/\s+/, $2);
1713 foreach my $m (@mods) {
1714 $main::acl_hash_cache{$user,$m}++;
1716 $main::acl_array_cache{$user} = \@mods;
1722 my $userdb = &get_userdb_string();
1723 my ($dbh, $proto) = $userdb ? &connect_userdb($userdb) : ( );
1725 if ($proto eq "mysql" || $proto eq "postgresql") {
1726 # Select usernames and modules from SQL DB
1727 my $cmd = $dbh->prepare("select webmin_user.name,webmin_user_attr.value from webmin_user,webmin_user_attr where webmin_user.id = webmin_user_attr.id and webmin_user_attr.attr = 'modules'");
1728 if ($cmd && $cmd->execute()) {
1729 while(my ($user, $mods) = $cmd->fetchrow()) {
1730 my @mods = split(/\s+/, $mods);
1731 foreach my $m (@mods) {
1732 $main::acl_hash_cache{$user,
1735 $main::acl_array_cache{$user} = \@mods;
1738 $cmd->finish() if ($cmd);
1740 elsif ($proto eq "ldap") {
1741 # XXX read from LDAP
1743 &disconnect_userdb($userdb, $dbh);
1746 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1747 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1752 Returns the file containing the webmin ACL, which is usually
1753 /etc/webmin/webmin.acl.
1758 return "$config_directory/webmin.acl";
1763 Does nothing, but kept around for compatability.
1770 =head2 get_miniserv_config(&hash)
1772 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1773 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1777 sub get_miniserv_config
1779 return &read_file_cached(
1780 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1783 =head2 put_miniserv_config(&hash)
1785 Writes out the Webmin webserver configuration file from the contents of
1786 the given hash ref. This should be initially populated by get_miniserv_config,
1789 get_miniserv_config(\%miniserv);
1790 $miniserv{'port'} = 10005;
1791 put_miniserv_config(\%miniserv);
1795 sub put_miniserv_config
1797 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1801 =head2 restart_miniserv([nowait])
1803 Kill the old miniserv process and re-start it, then optionally waits for
1804 it to restart. This will apply all configuration settings.
1807 sub restart_miniserv
1810 return undef if (&is_readonly_mode());
1812 &get_miniserv_config(\%miniserv) || return;
1815 if ($gconfig{'os_type'} ne 'windows') {
1816 # On Unix systems, we can restart with a signal
1817 my ($pid, $addr, $i);
1818 $miniserv{'inetd'} && return;
1819 my @oldst = stat($miniserv{'pidfile'});
1820 $pid = $ENV{'MINISERV_PID'};
1822 open(PID, $miniserv{'pidfile'}) ||
1823 &error("Failed to open PID file $miniserv{'pidfile'}");
1826 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1829 # Just signal miniserv to restart
1830 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1832 # Wait till new PID is written, indicating a restart
1833 for($i=0; $i<60; $i++) {
1835 my @newst = stat($miniserv{'pidfile'});
1836 last if ($newst[9] != $oldst[9]);
1838 $i < 60 || &error("Webmin server did not write new PID file");
1840 ## Totally kill the process and re-run it
1841 #$SIG{'TERM'} = 'IGNORE';
1842 #&kill_logged('TERM', $pid);
1843 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1846 # On Windows, we need to use the flag file
1847 open(TOUCH, ">$miniserv{'restartflag'}");
1852 # wait for miniserv to come back up
1853 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1855 for($i=0; $i<20; $i++) {
1857 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1858 my $rv = connect(STEST,
1859 pack_sockaddr_in($miniserv{'port'}, $addr));
1861 last if ($rv && ++$ok >= 2);
1863 $i < 20 || &error("Failed to restart Webmin server!");
1867 =head2 reload_miniserv
1869 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1870 configuration files. Not all changes will be applied though, such as the
1871 IP addresses and ports to accept connections on.
1876 return undef if (&is_readonly_mode());
1878 &get_miniserv_config(\%miniserv) || return;
1880 if ($gconfig{'os_type'} ne 'windows') {
1881 # Send a USR1 signal to re-read the config
1882 my ($pid, $addr, $i);
1883 $miniserv{'inetd'} && return;
1884 $pid = $ENV{'MINISERV_PID'};
1886 open(PID, $miniserv{'pidfile'}) ||
1887 &error("Failed to open PID file $miniserv{'pidfile'}");
1890 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1892 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1894 # Make sure this didn't kill Webmin!
1896 if (!kill(0, $pid)) {
1897 print STDERR "USR1 signal killed Webmin - restarting\n";
1898 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1902 # On Windows, we need to use the flag file
1903 open(TOUCH, ">$miniserv{'reloadflag'}");
1908 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1910 Returns 1 if some module is supported on the current operating system, or the
1911 OS supplies as parameters. The parameters are :
1913 =item minfo - A hash ref of module information, as returned by get_module_info
1915 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1917 =item os-version - The Webmin OS version to use, such as 13.0
1919 =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.
1922 sub check_os_support
1924 my $oss = $_[0]->{'os_support'};
1925 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1926 # May provide usable API
1927 $oss .= " ".$_[0]->{'api_os_support'};
1929 if ($_[0]->{'nozone'} && &running_in_zone()) {
1930 # Not supported in a Solaris Zone
1933 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1934 # Not supported in a Linux Vserver
1937 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1938 # Not supported in an OpenVZ container
1941 return 1 if (!$oss || $oss eq '*');
1942 my $osver = $_[2] || $gconfig{'os_version'};
1943 my $ostype = $_[1] || $gconfig{'os_type'};
1946 my ($os, $ver, $codes);
1947 my ($neg) = ($oss =~ s/^!//); # starts with !
1948 $anyneg++ if ($neg);
1949 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1951 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1953 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1955 $os = $1; $ver = $2; $oss = $3;
1957 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1959 $os = $1; $codes = $2; $oss = $3;
1961 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1963 $codes = $1; $oss = $2;
1965 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1967 $os = $1; $oss = $2;
1970 next if ($os && !($os eq $ostype ||
1971 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1972 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1973 next if ($osver < $1 || $osver > $2);
1975 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1976 next if ($osver < $1);
1978 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1979 next if ($osver > $1);
1982 next if ($ver ne $osver);
1984 next if ($codes && !eval $codes);
1990 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1992 Downloads data from a HTTP url to a local file or string. The parameters are :
1994 =item host - The hostname part of the URL, such as www.google.com
1996 =item port - The HTTP port number, such as 80
1998 =item page - The filename part of the URL, like /index.html
2000 =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.
2002 =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.
2004 =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.
2006 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2008 =item user - If set, HTTP authentication is done with this username.
2010 =item pass - The HTTP password to use with the username above.
2012 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2014 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2016 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2018 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2023 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2024 $timeout, $osdn, $nocache, $headers) = @_;
2025 if ($gconfig{'debug_what_net'}) {
2026 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2027 ($user ? " user=$user pass=$pass" : "").
2028 (ref($dest) ? "" : " dest=$dest"));
2031 # Convert OSDN URL first
2032 my $prot = $ssl ? "https://" : "http://";
2033 my $portstr = $ssl && $port == 443 ||
2034 !$ssl && $port == 80 ? "" : ":$port";
2035 ($host, $port, $page, $ssl) = &parse_http_url(
2036 &convert_osdn_url($prot.$host.$portstr.$page));
2039 # Check if we already have cached the URL
2040 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2041 my $cfile = &check_in_http_cache($url);
2042 if ($cfile && !$nocache) {
2043 # Yes! Copy to dest file or variable
2044 &$cbfunc(6, $url) if ($cbfunc);
2046 &open_readfile(CACHEFILE, $cfile);
2048 $$dest = <CACHEFILE>;
2052 ©_source_dest($cfile, $dest);
2059 push(@headers, [ "Host", $host ]);
2060 push(@headers, [ "User-agent", "Webmin" ]);
2061 push(@headers, [ "Accept-language", "en" ]);
2063 my $auth = &encode_base64("$user:$pass");
2064 $auth =~ tr/\r\n//d;
2065 push(@headers, [ "Authorization", "Basic $auth" ]);
2067 foreach my $hname (keys %$headers) {
2068 push(@headers, [ $hname, $headers->{$hname} ]);
2071 # Actually download it
2072 $main::download_timed_out = undef;
2073 local $SIG{ALRM} = \&download_timeout;
2074 alarm($timeout || 60);
2075 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2077 $h = $main::download_timed_out if ($main::download_timed_out);
2079 if ($error) { $$error = $h; return; }
2080 else { &error($h); }
2082 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2083 $headers, $ssl, $nocache);
2084 if ((!$error || !$$error) && !$nocache) {
2085 &write_to_http_cache($url, $dest);
2089 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2091 Do a HTTP download, after the headers have been sent. For internal use only,
2092 typically called by http_download.
2095 sub complete_http_download
2097 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2103 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2104 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2106 if ($_[2]) { ${$_[2]} = $line; return; }
2107 else { &error("Download failed : $line"); }
2110 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2113 $line = &read_http_connection($_[0]);
2114 $line =~ tr/\r\n//d;
2115 $line =~ /^(\S+):\s+(.*)$/ || last;
2116 $header{lc($1)} = $2;
2117 push(@headers, [ lc($1), $2 ]);
2120 if ($main::download_timed_out) {
2121 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2122 else { &error($main::download_timed_out); }
2124 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2125 if ($rcode >= 300 && $rcode < 400) {
2126 # follow the redirect
2127 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2128 my ($host, $port, $page, $ssl);
2129 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2130 $ssl = $1 eq 'https' ? 1 : 0;
2131 $host = $2; $port = $3; $page = $4 || "/";
2133 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2134 $ssl = $1 eq 'https' ? 1 : 0;
2135 $host = $2; $port = 80; $page = $3 || "/";
2137 elsif ($header{'location'} =~ /^\// && $_[5]) {
2138 # Relative to same server
2142 $page = $header{'location'};
2144 elsif ($header{'location'}) {
2145 # Assume relative to same dir .. not handled
2146 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2147 else { &error("Invalid Location header $header{'location'}"); }
2150 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2151 else { &error("Missing Location header"); }
2154 ($page, $params) = split(/\?/, $page);
2156 $page .= "?".$params if (defined($params));
2157 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2158 undef, undef, undef, $_[4], $_[9], $_[7]);
2163 # Append to a variable
2164 while(defined($buf = &read_http_connection($_[0], 1024))) {
2166 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2172 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2173 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2174 else { &error("Failed to write to $_[1] : $!"); }
2176 binmode(PFILE); # For windows
2177 while(defined($buf = &read_http_connection($_[0], 1024))) {
2178 &print_tempfile(PFILE, $buf);
2179 $got += length($buf);
2180 &$cbfunc(3, $got) if ($cbfunc);
2182 &close_tempfile(PFILE);
2183 if ($header{'content-length'} &&
2184 $got != $header{'content-length'}) {
2185 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2186 else { &error("Download incomplete"); }
2189 &$cbfunc(4) if ($cbfunc);
2191 &close_http_connection($_[0]);
2195 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2197 Download data from an FTP site to a local file. The parameters are :
2199 =item host - FTP server hostname
2201 =item file - File on the FTP server to download
2203 =item destfile - File on the Webmin system to download data to
2205 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2207 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2209 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2211 =item pass - Password for the username above.
2213 =item port - FTP server port number, which defaults to 21 if not set.
2218 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2220 if ($gconfig{'debug_what_net'}) {
2221 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2222 ($user ? " user=$user pass=$pass" : "").
2223 (ref($dest) ? "" : " dest=$dest"));
2227 if (&is_readonly_mode()) {
2228 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2230 else { &error("FTP connections not allowed in readonly mode"); }
2233 # Check if we already have cached the URL
2234 my $url = "ftp://".$host.$file;
2235 my $cfile = &check_in_http_cache($url);
2237 # Yes! Copy to dest file or variable
2238 &$cbfunc(6, $url) if ($cbfunc);
2240 &open_readfile(CACHEFILE, $cfile);
2242 $$dest = <CACHEFILE>;
2246 ©_source_dest($cfile, $dest);
2251 # Actually download it
2252 $main::download_timed_out = undef;
2253 local $SIG{ALRM} = \&download_timeout;
2256 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2257 # download through http-style proxy
2259 if (&open_socket($1, $2, "SOCK", \$error)) {
2261 if ($main::download_timed_out) {
2263 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2264 else { &error($main::download_timed_out); }
2266 my $esc = $_[1]; $esc =~ s/ /%20/g;
2267 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2268 my $portstr = $port == 21 ? "" : ":$port";
2269 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2270 print SOCK "User-agent: Webmin\r\n";
2271 if ($gconfig{'proxy_user'}) {
2272 my $auth = &encode_base64(
2273 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2274 $auth =~ tr/\r\n//d;
2275 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2278 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2281 elsif (!$gconfig{'proxy_fallback'}) {
2283 if ($error) { $$error = $main::download_timed_out; return 0; }
2284 else { &error($main::download_timed_out); }
2289 # connect to host and login with real FTP protocol
2290 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2292 if ($main::download_timed_out) {
2293 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2294 else { &error($main::download_timed_out); }
2296 &ftp_command("", 2, $_[3]) || return 0;
2298 # Login as supplied user
2299 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2301 if (int($urv[1]/100) == 3) {
2302 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2306 # Login as anonymous
2307 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2309 if (int($urv[1]/100) == 3) {
2310 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2314 &$cbfunc(1, 0) if ($cbfunc);
2317 # get the file size and tell the callback
2318 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2319 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2320 defined($size) || return 0;
2322 &$cbfunc(2, int($size));
2326 my $pasv = &ftp_command("PASV", 2, $_[3]);
2327 defined($pasv) || return 0;
2328 $pasv =~ /\(([0-9,]+)\)/;
2329 @n = split(/,/ , $1);
2330 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2331 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2332 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2336 &open_tempfile(PFILE, ">$_[2]", 1);
2337 while(read(CON, $buf, 1024) > 0) {
2338 &print_tempfile(PFILE, $buf);
2339 $got += length($buf);
2340 &$cbfunc(3, $got) if ($cbfunc);
2342 &close_tempfile(PFILE);
2344 if ($got != $size) {
2345 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2346 else { &error("Download incomplete"); }
2348 &$cbfunc(4) if ($cbfunc);
2350 &ftp_command("", 2, $_[3]) || return 0;
2354 &ftp_command("QUIT", 2, $_[3]) || return 0;
2358 &write_to_http_cache($url, $dest);
2362 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2364 Upload data from a local file to an FTP site. The parameters are :
2366 =item host - FTP server hostname
2368 =item file - File on the FTP server to write to
2370 =item srcfile - File on the Webmin system to upload data from
2372 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2374 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2376 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2378 =item pass - Password for the username above.
2380 =item port - FTP server port number, which defaults to 21 if not set.
2387 if (&is_readonly_mode()) {
2388 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2390 else { &error("FTP connections not allowed in readonly mode"); }
2393 $main::download_timed_out = undef;
2394 local $SIG{ALRM} = \&download_timeout;
2397 # connect to host and login
2398 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2400 if ($main::download_timed_out) {
2401 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2402 else { &error($main::download_timed_out); }
2404 &ftp_command("", 2, $_[3]) || return 0;
2406 # Login as supplied user
2407 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2409 if (int($urv[1]/100) == 3) {
2410 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2414 # Login as anonymous
2415 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2417 if (int($urv[1]/100) == 3) {
2418 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2422 &$cbfunc(1, 0) if ($cbfunc);
2424 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2426 # get the file size and tell the callback
2427 my @st = stat($_[2]);
2429 &$cbfunc(2, $st[7]);
2433 my $pasv = &ftp_command("PASV", 2, $_[3]);
2434 defined($pasv) || return 0;
2435 $pasv =~ /\(([0-9,]+)\)/;
2436 @n = split(/,/ , $1);
2437 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2438 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2443 while(read(PFILE, $buf, 1024) > 0) {
2445 $got += length($buf);
2446 &$cbfunc(3, $got) if ($cbfunc);
2450 if ($got != $st[7]) {
2451 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2452 else { &error("Upload incomplete"); }
2454 &$cbfunc(4) if ($cbfunc);
2457 &ftp_command("", 2, $_[3]) || return 0;
2458 &ftp_command("QUIT", 2, $_[3]) || return 0;
2464 =head2 no_proxy(host)
2466 Checks if some host is on the no proxy list. For internal use by the
2467 http_download and ftp_download functions.
2472 my $ip = &to_ipaddress($_[0]);
2473 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2474 return 1 if ($_[0] =~ /\Q$n\E/ ||
2480 =head2 open_socket(host, port, handle, [&error])
2482 Open a TCP connection to some host and port, using a file handle. The
2485 =item host - Hostname or IP address to connect to.
2487 =item port - TCP port number.
2489 =item handle - A file handle name to use for the connection.
2491 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2496 my ($host, $port, $fh, $err) = @_;
2497 $fh = &callers_package($fh);
2499 if ($gconfig{'debug_what_net'}) {
2500 &webmin_debug_log('TCP', "host=$host port=$port");
2502 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2503 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2504 else { &error("Failed to create socket : $!"); }
2507 if (!($addr = inet_aton($host))) {
2508 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2509 else { &error("Failed to lookup IP address for $host"); }
2511 if ($gconfig{'bind_proxy'}) {
2512 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2513 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2514 else { &error("Failed to bind to source address : $!"); }
2517 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2518 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2519 else { &error("Failed to connect to $host:$port : $!"); }
2521 my $old = select($fh); $| =1; select($old);
2525 =head2 download_timeout
2527 Called when a download times out. For internal use only.
2530 sub download_timeout
2532 $main::download_timed_out = "Download timed out";
2535 =head2 ftp_command(command, expected, [&error], [filehandle])
2537 Send an FTP command, and die if the reply is not what was expected. Mainly
2538 for internal use by the ftp_download and ftp_upload functions.
2543 my ($cmd, $expect, $err, $fh) = @_;
2545 $fh = &callers_package($fh);
2548 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2550 print $fh "$cmd\r\n";
2553 if (!($line = <$fh>)) {
2555 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2556 else { &error("Failed to read reply to $what"); }
2558 $line =~ /^(...)(.)(.*)$/;
2561 foreach my $c (@$expect) {
2562 $found++ if (int($1/100) == $c);
2566 $found++ if (int($1/100) == $_[1]);
2570 if ($err) { $$err = "$what failed : $3"; return undef; }
2571 else { &error("$what failed : $3"); }
2576 # Need to skip extra stuff..
2578 if (!($line = <$fh>)) {
2580 if ($$err) { $$err = "Failed to read reply to $what";
2582 else { &error("Failed to read reply to $what"); }
2584 $line =~ /^(....)(.*)$/; $reply .= $2;
2585 if ($1 eq "$rcode ") { last; }
2589 return wantarray ? ($reply, $rcode) : $reply;
2592 =head2 to_ipaddress(hostname)
2594 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2595 it cannot be resolved.
2600 if (&check_ipaddress($_[0])) {
2604 my $hn = gethostbyname($_[0]);
2605 return undef if (!$hn);
2606 local @ip = unpack("CCCC", $hn);
2607 return join("." , @ip);
2611 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2613 Renders a 4-column table of icons. The useful parameters are :
2615 =item links - An array ref of link destination URLs for the icons.
2617 =item titles - An array ref of titles to appear under the icons.
2619 =item icons - An array ref of URLs for icon images.
2621 =item columns - Number of columns to layout the icons with. Defaults to 4.
2626 &load_theme_library();
2627 if (defined(&theme_icons_table)) {
2628 &theme_icons_table(@_);
2632 my $cols = $_[3] ? $_[3] : 4;
2633 my $per = int(100.0 / $cols);
2634 print "<table class='icons_table' width=100% cellpadding=5>\n";
2635 for(my $i=0; $i<@{$_[0]}; $i++) {
2636 if ($i%$cols == 0) { print "<tr>\n"; }
2637 print "<td width=$per% align=center valign=top>\n";
2638 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2639 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2640 $_[7]->[$i], $_[8]->[$i]);
2642 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2644 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2645 print "</tr>\n" if ($need_tr);
2649 =head2 replace_file_line(file, line, [newline]*)
2651 Replaces one line in some file with 0 or more new lines. The parameters are :
2653 =item file - Full path to some file, like /etc/hosts.
2655 =item line - Line number to replace, starting from 0.
2657 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2660 sub replace_file_line
2663 my $realfile = &translate_filename($_[0]);
2664 open(FILE, $realfile);
2667 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2668 else { splice(@lines, $_[1], 1); }
2669 &open_tempfile(FILE, ">$realfile");
2670 &print_tempfile(FILE, @lines);
2671 &close_tempfile(FILE);
2674 =head2 read_file_lines(file, [readonly])
2676 Returns a reference to an array containing the lines from some file. This
2677 array can be modified, and will be written out when flush_file_lines()
2678 is called. The parameters are :
2680 =item file - Full path to the file to read.
2682 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2686 $lref = read_file_lines("/etc/hosts");
2687 push(@$lref, "127.0.0.1 localhost");
2688 flush_file_lines("/etc/hosts");
2694 my ($package, $filename, $line) = caller;
2695 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2697 my $realfile = &translate_filename($_[0]);
2698 if (!$main::file_cache{$realfile}) {
2701 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2702 open(READFILE, $realfile);
2705 $eol = /\r\n$/ ? "\r\n" : "\n";
2711 $main::file_cache{$realfile} = \@lines;
2712 $main::file_cache_noflush{$realfile} = $_[1];
2713 $main::file_cache_eol{$realfile} = $eol || "\n";
2716 # Make read-write if currently readonly
2718 $main::file_cache_noflush{$realfile} = 0;
2721 return $main::file_cache{$realfile};
2724 =head2 flush_file_lines([file], [eol])
2726 Write out to a file previously read by read_file_lines to disk (except
2727 for those marked readonly). The parameters are :
2729 =item file - The file to flush out.
2731 =item eof - End-of-line character for each line. Defaults to \n.
2734 sub flush_file_lines
2738 local $trans = &translate_filename($_[0]);
2739 $main::file_cache{$trans} ||
2740 &error("flush_file_lines called on non-loaded file $trans");
2741 push(@files, $trans);
2744 @files = ( keys %main::file_cache );
2746 foreach my $f (@files) {
2747 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2748 if (!$main::file_cache_noflush{$f}) {
2749 no warnings; # XXX Bareword file handles should go away
2750 &open_tempfile(FLUSHFILE, ">$f");
2751 foreach my $line (@{$main::file_cache{$f}}) {
2752 (print FLUSHFILE $line,$eol) ||
2753 &error(&text("efilewrite", $f, $!));
2755 &close_tempfile(FLUSHFILE);
2757 delete($main::file_cache{$f});
2758 delete($main::file_cache_noflush{$f});
2762 =head2 unflush_file_lines(file)
2764 Clear the internal cache of some given file, previously read by read_file_lines.
2767 sub unflush_file_lines
2769 my $realfile = &translate_filename($_[0]);
2770 delete($main::file_cache{$realfile});
2771 delete($main::file_cache_noflush{$realfile});
2774 =head2 unix_user_input(fieldname, user, [form])
2776 Returns HTML for an input to select a Unix user. By default this is a text
2777 box with a user popup button next to it.
2782 if (defined(&theme_unix_user_input)) {
2783 return &theme_unix_user_input(@_);
2785 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2786 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2789 =head2 unix_group_input(fieldname, user, [form])
2791 Returns HTML for an input to select a Unix group. By default this is a text
2792 box with a group popup button next to it.
2795 sub unix_group_input
2797 if (defined(&theme_unix_group_input)) {
2798 return &theme_unix_group_input(@_);
2800 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2801 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2804 =head2 hlink(text, page, [module], [width], [height])
2806 Returns HTML for a link that when clicked on pops up a window for a Webmin
2807 help page. The parameters are :
2809 =item text - Text for the link.
2811 =item page - Help page code, such as 'intro'.
2813 =item module - Module the help page is in. Defaults to the current module.
2815 =item width - Width of the help popup window. Defaults to 600 pixels.
2817 =item height - Height of the help popup window. Defaults to 400 pixels.
2819 The actual help pages are in each module's help sub-directory, in files with
2825 if (defined(&theme_hlink)) {
2826 return &theme_hlink(@_);
2828 my $mod = $_[2] ? $_[2] : &get_module_name();
2829 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2830 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2831 return "<a onClick='window.open(\"$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>";
2834 =head2 user_chooser_button(field, multiple, [form])
2836 Returns HTML for a javascript button for choosing a Unix user or users.
2837 The parameters are :
2839 =item field - Name of the HTML field to place the username into.
2841 =item multiple - Set to 1 if multiple users can be selected.
2843 =item form - Index of the form on the page.
2846 sub user_chooser_button
2848 return undef if (!&supports_users());
2849 return &theme_user_chooser_button(@_)
2850 if (defined(&theme_user_chooser_button));
2851 my $form = defined($_[2]) ? $_[2] : 0;
2852 my $w = $_[1] ? 500 : 300;
2854 if ($_[1] && $gconfig{'db_sizeusers'}) {
2855 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2857 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2858 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2860 return "<input type=button onClick='ifield = form.$_[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";
2863 =head2 group_chooser_button(field, multiple, [form])
2865 Returns HTML for a javascript button for choosing a Unix group or groups
2866 The parameters are :
2868 =item field - Name of the HTML field to place the group name into.
2870 =item multiple - Set to 1 if multiple groups can be selected.
2872 =item form - Index of the form on the page.
2875 sub group_chooser_button
2877 return undef if (!&supports_users());
2878 return &theme_group_chooser_button(@_)
2879 if (defined(&theme_group_chooser_button));
2880 my $form = defined($_[2]) ? $_[2] : 0;
2881 my $w = $_[1] ? 500 : 300;
2883 if ($_[1] && $gconfig{'db_sizeusers'}) {
2884 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2886 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2887 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2889 return "<input type=button onClick='ifield = form.$_[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";
2892 =head2 foreign_check(module, [api-only])
2894 Checks if some other module exists and is supported on this OS. The parameters
2897 =item module - Name of the module to check.
2899 =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.
2904 my ($mod, $api) = @_;
2906 my $mdir = &module_root_directory($mod);
2907 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2908 return &check_os_support(\%minfo, undef, undef, $api);
2911 =head2 foreign_exists(module)
2913 Checks if some other module exists. The module parameter is the short module
2919 my $mdir = &module_root_directory($_[0]);
2920 return -r "$mdir/module.info";
2923 =head2 foreign_available(module)
2925 Returns 1 if some module is installed, and acessible to the current user. The
2926 module parameter is the module directory name.
2929 sub foreign_available
2931 return 0 if (!&foreign_check($_[0]) &&
2932 !$gconfig{'available_even_if_no_support'});
2933 my %foreign_module_info = &get_module_info($_[0]);
2935 # Check list of allowed modules
2937 &read_acl(\%acl, undef);
2938 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2939 !$acl{$base_remote_user,'*'});
2941 # Check for usermod restrictions
2942 my @usermods = &list_usermods();
2943 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2945 if (&get_product_name() eq "webmin") {
2946 # Check if the user has any RBAC privileges in this module
2947 if (&supports_rbac($_[0]) &&
2948 &use_rbac_module_acl(undef, $_[0])) {
2949 # RBAC is enabled for this user and module - check if he
2951 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2952 return 0 if (!$rbacs);
2954 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2955 # If denying access to modules not specifically allowed by
2956 # RBAC, then prevent access
2961 # Check readonly support
2962 if (&is_readonly_mode()) {
2963 return 0 if (!$foreign_module_info{'readonly'});
2966 # Check if theme vetos
2967 if (defined(&theme_foreign_available)) {
2968 return 0 if (!&theme_foreign_available($_[0]));
2971 # Check if licence module vetos
2972 if ($main::licence_module) {
2973 return 0 if (!&foreign_call($main::licence_module,
2974 "check_module_licence", $_[0]));
2980 =head2 foreign_require(module, [file], [package])
2982 Brings in functions from another module, and places them in the Perl namespace
2983 with the same name as the module. The parameters are :
2985 =item module - The source module's directory name, like sendmail.
2987 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2989 =item package - Perl package to place the module's functions and global variables in.
2991 If the original module name contains dashes, they will be replaced with _ in
2997 my ($mod, $file, $pkg) = @_;
2998 $pkg ||= $mod || "global";
2999 $pkg =~ s/[^A-Za-z0-9]/_/g;
3002 push(@files, $file);
3006 my %minfo = &get_module_info($mod);
3007 if ($minfo{'library'}) {
3008 @files = split(/\s+/, $minfo{'library'});
3011 @files = ( $mod."-lib.pl" );
3014 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3015 return 1 if (!@files);
3016 foreach my $f (@files) {
3017 $main::done_foreign_require{$pkg,$f}++;
3020 my $mdir = &module_root_directory($mod);
3021 @INC = &unique($mdir, @INC);
3022 -d $mdir || &error("Module $mod does not exist");
3023 if (!&get_module_name() && $mod) {
3026 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3027 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3028 my $code = "package $pkg; ".
3029 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3030 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3031 foreach my $f (@files) {
3032 $code .= "do '$mdir/$f' || die \$@; ";
3035 if (defined($old_fmn)) {
3036 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3039 delete($ENV{'FOREIGN_MODULE_NAME'});
3041 if (defined($old_frd)) {
3042 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3045 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3048 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3052 =head2 foreign_call(module, function, [arg]*)
3054 Call a function in another module. The module parameter is the target module
3055 directory name, function is the perl sub to call, and the remaining parameters
3056 are the arguments. However, unless you need to call a function whose name
3057 is dynamic, it is better to use Perl's cross-module function call syntax
3058 like module::function(args).
3063 my $pkg = $_[0] || "global";
3064 $pkg =~ s/[^A-Za-z0-9]/_/g;
3065 my @args = @_[2 .. @_-1];
3066 $main::foreign_args = \@args;
3067 my @rv = eval <<EOF;
3069 &$_[1](\@{\$main::foreign_args});
3071 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3072 return wantarray ? @rv : $rv[0];
3075 =head2 foreign_config(module, [user-config])
3077 Get the configuration from another module, and return it as a hash. If the
3078 user-config parameter is set to 1, returns the Usermin user-level preferences
3079 for the current user instead.
3084 my ($mod, $uc) = @_;
3087 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3088 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3089 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3092 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3097 =head2 foreign_installed(module, mode)
3099 Checks if the server for some module is installed, and possibly also checks
3100 if the module has been configured by Webmin.
3101 For mode 1, returns 2 if the server is installed and configured for use by
3102 Webmin, 1 if installed but not configured, or 0 otherwise.
3103 For mode 0, returns 1 if installed, 0 if not.
3104 If the module does not provide an install_check.pl script, assumes that
3105 the server is installed.
3108 sub foreign_installed
3110 my ($mod, $configured) = @_;
3111 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3113 return $main::foreign_installed_cache{$mod,$configured};
3117 if (!&foreign_check($mod)) {
3122 my $mdir = &module_root_directory($mod);
3123 if (!-r "$mdir/install_check.pl") {
3124 # Not known, assume OK
3125 $rv = $configured ? 2 : 1;
3128 # Call function to check
3129 &foreign_require($mod, "install_check.pl");
3130 $rv = &foreign_call($mod, "is_installed", $configured);
3133 $main::foreign_installed_cache{$mod,$configured} = $rv;
3138 =head2 foreign_defined(module, function)
3140 Returns 1 if some function is defined in another module. In general, it is
3141 simpler to use the syntax &defined(module::function) instead.
3147 $pkg =~ s/[^A-Za-z0-9]/_/g;
3148 my $func = "${pkg}::$_[1]";
3149 return defined(&$func);
3152 =head2 get_system_hostname([short])
3154 Returns the hostname of this system. If the short parameter is set to 1,
3155 then the domain name is not prepended - otherwise, Webmin will attempt to get
3156 the fully qualified hostname, like foo.example.com.
3159 sub get_system_hostname
3162 if (!$main::get_system_hostname[$m]) {
3163 if ($gconfig{'os_type'} ne 'windows') {
3164 # Try some common Linux hostname files first
3166 if ($gconfig{'os_type'} eq 'redhat-linux') {
3168 &read_env_file("/etc/sysconfig/network", \%nc);
3169 if ($nc{'HOSTNAME'}) {
3170 $fromfile = $nc{'HOSTNAME'};
3173 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3174 my $hn = &read_file_contents("/etc/hostname");
3180 elsif ($gconfig{'os_type'} eq 'open-linux') {
3181 my $hn = &read_file_contents("/etc/HOSTNAME");
3187 elsif ($gconfig{'os_type'} eq 'solaris') {
3188 my $hn = &read_file_contents("/etc/nodename");
3195 # If we found a hostname, use it if value
3196 if ($fromfile && ($m || $fromfile =~ /\./)) {
3198 $fromfile =~ s/\..*$//;
3200 $main::get_system_hostname[$m] = $fromfile;
3204 # Can use hostname command on Unix
3205 &execute_command("hostname", undef,
3206 \$main::get_system_hostname[$m], undef, 0, 1);
3207 chop($main::get_system_hostname[$m]);
3209 eval "use Sys::Hostname";
3211 $main::get_system_hostname[$m] = eval "hostname()";
3213 if ($@ || !$main::get_system_hostname[$m]) {
3214 $main::get_system_hostname[$m] = "UNKNOWN";
3217 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3218 $gconfig{'os_type'} =~ /linux$/ &&
3219 !$gconfig{'no_hostname_f'} && !$_[0]) {
3220 # Try with -f flag to get fully qualified name
3222 my $ex = &execute_command("hostname -f", undef, \$flag,
3225 if ($ex || $flag eq "") {
3226 # -f not supported! We have probably set the
3227 # hostname to just '-f'. Fix the problem
3230 &execute_command("hostname ".
3231 quotemeta($main::get_system_hostname[$m]),
3232 undef, undef, undef, 0, 1);
3236 $main::get_system_hostname[$m] = $flag;
3241 # On Windows, try computername environment variable
3242 return $ENV{'computername'} if ($ENV{'computername'});
3243 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3245 # Fall back to net name command
3246 my $out = `net name 2>&1`;
3247 if ($out =~ /\-+\r?\n(\S+)/) {
3248 $main::get_system_hostname[$m] = $1;
3251 $main::get_system_hostname[$m] = "windows";
3255 return $main::get_system_hostname[$m];
3258 =head2 get_webmin_version
3260 Returns the version of Webmin currently being run, such as 1.450.
3263 sub get_webmin_version
3265 if (!$get_webmin_version) {
3266 open(VERSION, "$root_directory/version") || return 0;
3267 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3270 return $get_webmin_version;
3273 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3275 Returns a hash containing access control options for the given user and module.
3276 By default the current username and module name are used. If the no-rbac flag
3277 is given, the permissions will not be updated based on the user's RBAC role
3278 (as seen on Solaris). If the no-default flag is given, default permissions for
3279 the module will not be included.
3284 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3285 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3286 my $mdir = &module_root_directory($m);
3289 # Read default ACL first, to be overridden by per-user settings
3290 &read_file_cached("$mdir/defaultacl", \%rv);
3292 # If this isn't a master admin user, apply the negative permissions
3293 # so that he doesn't un-expectedly gain access to new features
3295 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3296 if ($gaccess{'negative'}) {
3297 &read_file_cached("$mdir/negativeacl", \%rv);
3301 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3302 # RBAC overrides exist for this user in this module
3303 my $rbac = &get_rbac_module_acl(
3304 defined($_[0]) ? $_[0] : $remote_user, $m);
3305 foreach my $r (keys %$rbac) {
3306 $rv{$r} = $rbac->{$r};
3309 elsif ($gconfig{"risk_$u"} && $m) {
3310 # ACL is defined by user's risk level
3311 my $rf = $gconfig{"risk_$u"}.'.risk';
3312 &read_file_cached("$mdir/$rf", \%rv);
3314 my $sf = $gconfig{"skill_$u"}.'.skill';
3315 &read_file_cached("$mdir/$sf", \%rv);
3318 # Use normal Webmin ACL, if a user is set
3319 my $userdb = &get_userdb_string();
3321 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3322 # Look for this user in the user/group DB, if one is defined
3323 # and if the user might be in the DB
3324 my ($dbh, $proto) = &connect_userdb($userdb);
3325 ref($dbh) || &error(&text('euserdbacl', $dbh));
3326 if ($proto eq "mysql" || $proto eq "postgresql") {
3327 # Find the user in the SQL DB
3328 my $cmd = $dbh->prepare(
3329 "select id from webmin_user where name = ?");
3330 $cmd && $cmd->execute($u) ||
3331 &error(&text('euserdbacl', $dbh->errstr));
3332 my ($id) = $cmd->fetchrow();
3333 $foundindb = 1 if (defined($id));
3336 # Fetch ACLs with SQL
3338 my $cmd = $dbh->prepare(
3339 "select attr,value from webmin_user_acl ".
3340 "where id = ? and module = ?");
3341 $cmd && $cmd->execute($id, $m) ||
3342 &error(&text('euserdbacl', $dbh->errstr));
3343 while(my ($a, $v) = $cmd->fetchrow()) {
3349 elsif ($proto eq "ldap") {
3350 # Fetch ACLs from LDAP
3353 &disconnect_userdb($userdb, $dbh);
3357 # Read from local files
3358 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3359 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3361 "$config_directory/$m/$remote_user.acl",\%rv);
3365 if ($tconfig{'preload_functions'}) {
3366 &load_theme_library();
3368 if (defined(&theme_get_module_acl)) {
3369 %rv = &theme_get_module_acl($u, $m, \%rv);
3374 =head2 get_group_module_acl(group, [module], [no-default])
3376 Returns the ACL for a Webmin group, in an optional module (which defaults to
3377 the current module).
3380 sub get_group_module_acl
3383 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3384 my $mdir = &module_root_directory($m);
3387 &read_file_cached("$mdir/defaultacl", \%rv);
3390 my $userdb = &get_userdb_string();
3393 # Look for this group in the user/group DB
3394 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3395 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3396 if ($proto eq "mysql" || $proto eq "postgresql") {
3397 # Find the group in the SQL DB
3398 my $cmd = $dbh->prepare(
3399 "select id from webmin_group where name = ?");
3400 $cmd && $cmd->execute($g) ||
3401 &error(&text('egroupdbacl', $dbh->errstr));
3402 my ($id) = $cmd->fetchrow();
3403 $foundindb = 1 if (defined($id));
3406 # Fetch ACLs with SQL
3408 my $cmd = $dbh->prepare(
3409 "select attr,value from webmin_group_acl ".
3410 "where id = ? and module = ?");
3411 $cmd && $cmd->execute($id, $m) ||
3412 &error(&text('egroupdbacl', $dbh->errstr));
3413 while(my ($a, $v) = $cmd->fetchrow()) {
3419 elsif ($proto eq "ldap") {
3420 # Find group in LDAP
3421 my $rv = $dbh->search(
3423 filter => '(cn='.$g.')',
3425 if (!$rv || $rv->code) {
3426 &error(&text('egroupdbacl',
3427 $rv ? $rv->error : "Unknown error"));
3429 my ($group) = $rv->all_entries;
3431 # Find ACL sub-object for the module
3433 my $rv = $dbh->search(
3434 base => $group->dn(),
3435 filter => '(cn='.$m.')',
3437 if (!$rv || $rv->code) {
3438 &error(&text('egroupdbacl',
3439 $rv ? $rv->error : "Unknown error"));
3441 my ($acl) = $rv->all_entries;
3443 foreach my $av ($acl->get_value('webminAcl')) {
3444 my ($a, $v) = split(/=/, $av, 2);
3450 &disconnect_userdb($userdb, $dbh);
3453 # Read from local files
3454 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3456 if (defined(&theme_get_module_acl)) {
3457 %rv = &theme_get_module_acl($g, $m, \%rv);
3462 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3464 Updates the acl hash for some user and module. The parameters are :
3466 =item acl - Hash reference for the new access control options, or undef to clear
3468 =item user - User to update, defaulting to the current user.
3470 =item module - Module to update, defaulting to the caller.
3472 =item never-update-group - Never update the user's group's ACL
3477 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3478 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3479 if (!$_[3] && &foreign_check("acl")) {
3480 # Check if this user is a member of a group, and if he gets the
3481 # module from a group. If so, update its ACL as well
3482 &foreign_require("acl", "acl-lib.pl");
3484 foreach my $g (&acl::list_groups()) {
3485 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3486 &indexof($m, @{$g->{'modules'}}) >= 0) {
3492 &save_group_module_acl($_[0], $group->{'name'}, $m);
3496 my $userdb = &get_userdb_string();
3498 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3499 # Look for this user in the user/group DB
3500 my ($dbh, $proto) = &connect_userdb($userdb);
3501 ref($dbh) || &error(&text('euserdbacl', $dbh));
3502 if ($proto eq "mysql" || $proto eq "postgresql") {
3503 # Find the user in the SQL DB
3504 my $cmd = $dbh->prepare(
3505 "select id from webmin_user where name = ?");
3506 $cmd && $cmd->execute($u) ||
3507 &error(&text('euserdbacl2', $dbh->errstr));
3508 my ($id) = $cmd->fetchrow();
3509 $foundindb = 1 if (defined($id));
3512 # Replace ACLs for user
3514 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3515 "where id = ? and module = ?");
3516 $cmd && $cmd->execute($id, $m) ||
3517 &error(&text('euserdbacl', $dbh->errstr));
3520 my $cmd = $dbh->prepare(
3521 "insert into webmin_user_acl ".
3522 "(id,module,attr,value) values (?,?,?,?)");
3523 $cmd || &error(&text('euserdbacl2',
3525 foreach my $a (keys %{$_[0]}) {
3526 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3527 &error(&text('euserdbacl2',
3534 elsif ($proto eq "ldap") {
3535 # Update ACLs in LDAP
3538 &disconnect_userdb($userdb, $dbh);
3542 # Save ACL to local file
3543 if (!-d "$config_directory/$m") {
3544 mkdir("$config_directory/$m", 0755);
3547 &write_file("$config_directory/$m/$u.acl", $_[0]);
3550 &unlink_file("$config_directory/$m/$u.acl");
3555 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3557 Updates the acl hash for some group and module. The parameters are :
3559 =item acl - Hash reference for the new access control options.
3561 =item group - Group name to update.
3563 =item module - Module to update, defaulting to the caller.
3565 =item never-update-group - Never update the parent group's ACL
3568 sub save_group_module_acl
3571 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3572 if (!$_[3] && &foreign_check("acl")) {
3573 # Check if this group is a member of a group, and if it gets the
3574 # module from a group. If so, update the parent ACL as well
3575 &foreign_require("acl", "acl-lib.pl");
3577 foreach my $pg (&acl::list_groups()) {
3578 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3579 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3585 &save_group_module_acl($_[0], $group->{'name'}, $m);
3589 my $userdb = &get_userdb_string();
3592 # Look for this group in the user/group DB
3593 my ($dbh, $proto) = &connect_userdb($userdb);
3594 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3595 if ($proto eq "mysql" || $proto eq "postgresql") {
3596 # Find the group in the SQL DB
3597 my $cmd = $dbh->prepare(
3598 "select id from webmin_group where name = ?");
3599 $cmd && $cmd->execute($g) ||
3600 &error(&text('egroupdbacl2', $dbh->errstr));
3601 my ($id) = $cmd->fetchrow();
3602 $foundindb = 1 if (defined($id));
3605 # Replace ACLs for group
3607 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3608 "where id = ? and module = ?");
3609 $cmd && $cmd->execute($id, $m) ||
3610 &error(&text('egroupdbacl', $dbh->errstr));
3613 my $cmd = $dbh->prepare(
3614 "insert into webmin_group_acl ".
3615 "(id,module,attr,value) values (?,?,?,?)");
3616 $cmd || &error(&text('egroupdbacl2',
3618 foreach my $a (keys %{$_[0]}) {
3619 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3620 &error(&text('egroupdbacl2',
3627 elsif ($proto eq "ldap") {
3628 # Update ACLs in LDAP
3631 &disconnect_userdb($userdb, $dbh);
3635 # Save ACL to local file
3636 if (!-d "$config_directory/$m") {
3637 mkdir("$config_directory/$m", 0755);
3640 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3643 &unlink_file("$config_directory/$m/$g.gacl");
3650 This function must be called by all Webmin CGI scripts, either directly or
3651 indirectly via a per-module lib.pl file. It performs a number of initialization
3652 and housekeeping tasks, such as working out the module name, checking that the
3653 current user has access to the module, and populating global variables. Some
3654 of the variables set include :
3656 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3658 =item $var_directory - Base logs directory, typically /var/webmin
3660 =item %config - Per-module configuration.
3662 =item %gconfig - Global configuration.
3664 =item $scriptname - Base name of the current perl script.
3666 =item $module_name - The name of the current module.
3668 =item $module_config_directory - The config directory for this module.
3670 =item $module_config_file - The config file for this module.
3672 =item $module_root_directory - This module's code directory.
3674 =item $webmin_logfile - The detailed logfile for webmin.
3676 =item $remote_user - The actual username used to login to webmin.
3678 =item $base_remote_user - The username whose permissions are in effect.
3680 =item $current_theme - The theme currently in use.
3682 =item $root_directory - The first root directory of this webmin install.
3684 =item @root_directories - All root directories for this webmin install.
3689 # Record first process ID that called this, so we know when it exited to clean
3691 $main::initial_process_id ||= $$;
3693 # Configuration and spool directories
3694 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3695 die "WEBMIN_CONFIG not set";
3697 $config_directory = $ENV{'WEBMIN_CONFIG'};
3698 if (!defined($ENV{'WEBMIN_VAR'})) {
3699 open(VARPATH, "$config_directory/var-path");
3700 chop($var_directory = <VARPATH>);
3704 $var_directory = $ENV{'WEBMIN_VAR'};
3706 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3707 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3709 if ($ENV{'SESSION_ID'}) {
3710 # Hide this variable from called programs, but keep it for internal use
3711 $main::session_id = $ENV{'SESSION_ID'};
3712 delete($ENV{'SESSION_ID'});
3714 if ($ENV{'REMOTE_PASS'}) {
3715 # Hide the password too
3716 $main::remote_pass = $ENV{'REMOTE_PASS'};
3717 delete($ENV{'REMOTE_PASS'});
3720 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3721 # Looks like we are running setuid, but the real UID hasn't been set.
3722 # Do so now, so that executed programs don't get confused
3727 # Read the webmin global config file. This contains the OS type and version,
3728 # OS specific configuration and global options such as proxy servers
3729 $config_file = "$config_directory/config";
3731 &read_file_cached($config_file, \%gconfig);
3732 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3733 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3735 # If debugging is enabled, open the debug log
3736 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3737 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3738 if ($gconfig{'debug_size'}) {
3739 my @st = stat($dlog);
3740 if ($st[7] > $gconfig{'debug_size'}) {
3741 rename($dlog, $dlog.".0");
3744 open(main::DEBUGLOG, ">>$dlog");
3745 $main::opened_debug_log = 1;
3747 if ($gconfig{'debug_what_start'}) {
3748 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3749 $main::debug_log_start_time = time();
3750 &webmin_debug_log("START", "script=$script_name");
3751 $main::debug_log_start_module = $module_name;
3755 # Set PATH and LD_LIBRARY_PATH
3756 if ($gconfig{'path'}) {
3757 if ($gconfig{'syspath'}) {
3759 $ENV{'PATH'} = $gconfig{'path'};
3763 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3766 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3768 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3769 if ($gconfig{'http_proxy'}) {
3770 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3772 if ($gconfig{'ftp_proxy'}) {
3773 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3775 if ($gconfig{'noproxy'}) {
3776 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3779 # Find all root directories
3781 if (&get_miniserv_config(\%miniserv)) {
3782 @root_directories = ( $miniserv{'root'} );
3783 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3784 push(@root_directories, $miniserv{"extraroot_$i"});
3788 # Work out which module we are in, and read the per-module config file
3789 $0 =~ s/\\/\//g; # Force consistent path on Windows
3790 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3791 # In a foreign call - use the module name given
3792 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3793 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3794 @root_directories = ( $root_directory ) if (!@root_directories);
3796 elsif ($ENV{'SCRIPT_NAME'}) {
3797 my $sn = $ENV{'SCRIPT_NAME'};
3798 $sn =~ s/^$gconfig{'webprefix'}//
3799 if (!$gconfig{'webprefixnoredir'});
3800 if ($sn =~ /^\/([^\/]+)\//) {
3801 # Get module name from CGI path
3804 if ($ENV{'SERVER_ROOT'}) {
3805 $root_directory = $ENV{'SERVER_ROOT'};
3807 elsif ($ENV{'SCRIPT_FILENAME'}) {
3808 $root_directory = $ENV{'SCRIPT_FILENAME'};
3809 $root_directory =~ s/$sn$//;
3811 @root_directories = ( $root_directory ) if (!@root_directories);
3814 # Get root directory from miniserv.conf, and deduce module name from $0
3815 $root_directory = $root_directories[0];
3817 foreach my $r (@root_directories) {
3818 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3819 # Under a module directory
3824 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3830 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3833 # Work out of this is a web, command line or cron job
3834 if (!$main::webmin_script_type) {
3835 if ($ENV{'SCRIPT_NAME'}) {
3837 $main::webmin_script_type = 'web';
3840 # Cron jobs have no TTY
3841 if ($gconfig{'os_type'} eq 'windows' ||
3842 open(DEVTTY, ">/dev/tty")) {
3843 $main::webmin_script_type = 'cmd';
3847 $main::webmin_script_type = 'cron';
3852 # Set the umask based on config
3853 if ($gconfig{'umask'} && !$main::umask_already++) {
3854 umask(oct($gconfig{'umask'}));
3857 # If this is a cron job or other background task, set the nice level
3858 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3860 if ($gconfig{'nice'}) {
3861 eval 'POSIX::nice($gconfig{\'nice\'});';
3864 # Set IO scheduling class and priority
3865 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3867 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3868 if ($gconfig{'sclass'} ne '');
3869 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3870 if ($gconfig{'sprio'} ne '');
3872 &execute_command("$cmd >/dev/null 2>&1");
3875 $main::nice_already++;
3878 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3879 $base_remote_user = $u;
3880 $remote_user = $ENV{'REMOTE_USER'};
3882 # Work out if user is definitely in the DB, and if so get his attrs
3883 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
3884 %remote_user_attrs = ( );
3885 if ($remote_user_proto) {
3886 my $userdb = &get_userdb_string();
3887 my ($dbh, $proto) = $userdb ? &connect_userdb($userdb) : ( );
3889 if ($proto eq "mysql" || $proto eq "postgresql") {
3890 # Read attrs from SQL
3891 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
3892 if ($cmd && $cmd->execute($base_remote_user)) {
3893 while(my ($attr, $value) = $cmd->fetchrow()) {
3894 $remote_user_attrs{$attr} = $value;
3899 elsif ($proto eq "ldap") {
3900 # XXX read attrs from LDAP
3902 &disconnect_userdb($userdb, $dbh);
3907 # Find and load the configuration file for this module
3908 my (@ruinfo, $rgroup);
3909 $module_config_directory = "$config_directory/$module_name";
3910 if (&get_product_name() eq "usermin" &&
3911 -r "$module_config_directory/config.$remote_user") {
3913 $module_config_file = "$module_config_directory/config.$remote_user";
3915 elsif (&get_product_name() eq "usermin" &&
3916 (@ruinfo = getpwnam($remote_user)) &&
3917 ($rgroup = getgrgid($ruinfo[3])) &&
3918 -r "$module_config_directory/config.\@$rgroup") {
3919 # Based on group name
3920 $module_config_file = "$module_config_directory/config.\@$rgroup";
3924 $module_config_file = "$module_config_directory/config";
3927 &read_file_cached($module_config_file, \%config);
3929 # Fix up windows-specific substitutions in values
3930 foreach my $k (keys %config) {
3931 if ($config{$k} =~ /\$\{systemroot\}/) {
3932 my $root = &get_windows_root();
3933 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3938 # Record the initial module
3939 $main::initial_module_name ||= $module_name;
3941 # Set some useful variables
3943 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3944 $gconfig{'mobile_theme'} :
3945 defined($remote_user_attrs{'theme'}) ?
3946 $remote_user_attrs{'theme'} :
3947 defined($gconfig{'theme_'.$remote_user}) ?
3948 $gconfig{'theme_'.$remote_user} :
3949 defined($gconfig{'theme_'.$base_remote_user}) ?
3950 $gconfig{'theme_'.$base_remote_user} :
3952 @current_themes = split(/\s+/, $current_themes);
3953 $current_theme = $current_themes[0];
3954 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3955 $theme_root_directory = $theme_root_directories[0];
3956 @theme_configs = ( );
3957 foreach my $troot (@theme_root_directories) {
3959 &read_file_cached("$troot/config", \%onetconfig);
3960 &read_file_cached("$troot/config", \%tconfig);
3961 push(@theme_configs, \%onetconfig);
3963 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3964 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3966 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3967 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3969 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3970 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3971 if ($tconfig{'preload_functions'}) {
3972 # Force load of theme functions right now, if requested
3973 &load_theme_library();
3975 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3976 # Load the theme's Webmin:: package classes
3977 do "$theme_root_directory/$tconfig{'oofunctions'}";
3982 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3983 : "$var_directory/webmin.log";
3985 # Load language strings into %text
3986 my @langs = &list_languages();
3988 if ($gconfig{'acceptlang'}) {
3989 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3990 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3992 $accepted_lang = $al->{'lang'};
3997 $current_lang = $force_lang ? $force_lang :
3998 $accepted_lang ? $accepted_lang :
3999 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4000 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4001 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4002 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4003 foreach my $l (@langs) {
4004 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4006 @lang_order_list = &unique($default_lang,
4007 split(/:/, $current_lang_info->{'fallback'}),
4009 %text = &load_language($module_name);
4010 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4012 # Get the %module_info for this module
4014 my ($mi) = grep { $_->{'dir'} eq $module_name }
4015 &get_all_module_infos(2);
4016 %module_info = %$mi;
4017 $module_root_directory = &module_root_directory($module_name);
4020 if ($module_name && !$main::no_acl_check &&
4021 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4022 # Check if the HTTP user can access this module
4023 if (!&foreign_available($module_name)) {
4024 if (!&foreign_check($module_name)) {
4025 &error(&text('emodulecheck',
4026 "<i>$module_info{'desc'}</i>"));
4029 &error(&text('emodule', "<i>$u</i>",
4030 "<i>$module_info{'desc'}</i>"));
4033 $main::no_acl_check++;
4036 # Check the Referer: header for nasty redirects
4037 my @referers = split(/\s+/, $gconfig{'referers'});
4039 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4042 my $http_host = $ENV{'HTTP_HOST'};
4043 $http_host =~ s/:\d+$//;
4044 my $unsafe_index = $unsafe_index_cgi ||
4045 &get_module_variable('$unsafe_index_cgi');
4047 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4048 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4050 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4051 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4052 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4053 ($referer_site && $referer_site ne $http_host &&
4054 &indexof($referer_site, @referers) < 0 ||
4055 !$referer_site && $gconfig{'referers_none'}) &&
4056 !$trust_unknown_referers &&
4057 !&get_module_variable('$trust_unknown_referers')) {
4058 # Looks like a link from elsewhere .. show an error
4059 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4061 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4062 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4063 if ($referer_site) {
4065 print &text('referer_warn',
4066 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
4068 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4069 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4072 # No referer info given
4073 print &text('referer_warn_unknown', $url),"<p>\n";
4074 print &text('referer_fix1u'),"<p>\n";
4075 print &text('referer_fix2u'),"<p>\n";
4079 &footer("/", $text{'index'});
4082 $main::no_referers_check++;
4083 $main::completed_referers_check++;
4085 # Call theme post-init
4086 if (defined(&theme_post_init_config)) {
4087 &theme_post_init_config(@_);
4090 # Record that we have done the calling library in this package
4091 my ($callpkg, $lib) = caller();
4093 $main::done_foreign_require{$callpkg,$lib} = 1;
4095 # If a licence checking is enabled, do it now
4096 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4097 &foreign_check($gconfig{'licence_module'}) &&
4098 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4099 my $oldpwd = &get_current_dir();
4100 $main::done_licence_module_check++;
4101 $main::licence_module = $gconfig{'licence_module'};
4102 &foreign_require($main::licence_module, "licence_check.pl");
4103 ($main::licence_status, $main::licence_message) =
4104 &foreign_call($main::licence_module, "check_licence");
4108 # Export global variables to caller
4109 if ($main::export_to_caller) {
4110 foreach my $v ('$config_file', '%gconfig', '$null_file',
4111 '$path_separator', '@root_directories',
4112 '$root_directory', '$module_name',
4113 '$base_remote_user', '$remote_user',
4114 '$remote_user_proto', '%remote_user_attrs',
4115 '$module_config_directory', '$module_config_file',
4116 '%config', '@current_themes', '$current_theme',
4117 '@theme_root_directories', '$theme_root_directory',
4118 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4119 '$webmin_logfile', '$current_lang',
4120 '$current_lang_info', '@lang_order_list', '%text',
4121 '%module_info', '$module_root_directory') {
4122 my ($vt, $vn) = split('', $v, 2);
4123 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4130 =head2 load_language([module], [directory])
4132 Returns a hashtable mapping text codes to strings in the appropriate language,
4133 based on the $current_lang global variable, which is in turn set based on
4134 the Webmin user's selection. The optional module parameter tells the function
4135 which module to load strings for, and defaults to the calling module. The
4136 optional directory parameter can be used to load strings from a directory
4139 In regular module development you will never need to call this function
4140 directly, as init_config calls it for you, and places the module's strings
4141 into the %text hash.
4147 my $root = $root_directory;
4148 my $ol = $gconfig{'overlang'};
4149 my ($dir) = ($_[1] || "lang");
4151 # Read global lang files
4152 foreach my $o (@lang_order_list) {
4153 my $ok = &read_file_cached("$root/$dir/$o", \%text);
4154 return () if (!$ok && $o eq $default_lang);
4157 foreach my $o (@lang_order_list) {
4158 &read_file_cached("$root/$ol/$o", \%text);
4161 &read_file_cached("$config_directory/custom-lang", \%text);
4164 # Read module's lang files
4165 my $mdir = &module_root_directory($_[0]);
4166 foreach my $o (@lang_order_list) {
4167 &read_file_cached("$mdir/$dir/$o", \%text);
4170 foreach $o (@lang_order_list) {
4171 &read_file_cached("$mdir/$ol/$o", \%text);
4174 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4176 foreach $k (keys %text) {
4177 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4180 if (defined(&theme_load_language)) {
4181 &theme_load_language(\%text, $_[0]);
4186 =head2 text_subs(string)
4188 Used internally by load_language to expand $code substitutions in language
4194 if (substr($_[0], 0, 8) eq "include:") {
4197 open(INCLUDE, substr($_[0], 8));
4205 my $t = $_[1]->{$_[0]};
4206 return defined($t) ? $t : '$'.$_[0];
4210 =head2 text(message, [substitute]+)
4212 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4213 the substitute parameters. This makes it easy to use strings with placeholders
4214 that get replaced with programmatically generated text. For example :
4216 print &text('index_hello', $remote_user),"<p>\n";
4221 my $t = &get_module_variable('%text', 1);
4222 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4223 for(my $i=1; $i<@_; $i++) {
4224 $rv =~ s/\$$i/$_[$i]/g;
4229 =head2 encode_base64(string)
4231 Encodes a string into base64 format, for use in MIME email or HTTP
4232 authorization headers.
4238 pos($_[0]) = 0; # ensure start at the beginning
4239 while ($_[0] =~ /(.{1,57})/gs) {
4240 $res .= substr(pack('u57', $1), 1)."\n";
4243 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4244 my $padding = (3 - length($_[0]) % 3) % 3;
4245 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4249 =head2 decode_base64(string)
4251 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4258 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4259 if (length($str) % 4) {
4262 $str =~ s/=+$//; # remove padding
4263 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4264 while ($str =~ /(.{1,60})/gs) {
4265 my $len = chr(32 + length($1)*3/4); # compute length byte
4266 $res .= unpack("u", $len . $1 ); # uudecode
4271 =head2 get_module_info(module, [noclone], [forcache])
4273 Returns a hash containg details of the given module. Some useful keys are :
4275 =item dir - The module directory, like sendmail.
4277 =item desc - Human-readable description, in the current users' language.
4279 =item version - Optional module version number.
4281 =item os_support - List of supported operating systems and versions.
4283 =item category - Category on Webmin's left menu, like net.
4288 return () if ($_[0] =~ /^\./);
4289 my (%rv, $clone, $o);
4290 my $mdir = &module_root_directory($_[0]);
4291 &read_file_cached("$mdir/module.info", \%rv) || return ();
4293 foreach $o (@lang_order_list) {
4294 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4295 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4297 if ($clone && !$_[1] && $config_directory) {
4298 $rv{'clone'} = $rv{'desc'};
4299 &read_file("$config_directory/$_[0]/clone", \%rv);
4302 my %module_categories;
4303 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4304 my $pn = &get_product_name();
4305 if (defined($rv{'category_'.$pn})) {
4306 # Can override category for webmin/usermin
4307 $rv{'category'} = $rv{'category_'.$pn};
4309 $rv{'realcategory'} = $rv{'category'};
4310 $rv{'category'} = $module_categories{$_[0]}
4311 if (defined($module_categories{$_[0]}));
4313 # Apply description overrides
4314 $rv{'realdesc'} = $rv{'desc'};
4316 &read_file_cached("$config_directory/webmin.descs", \%descs);
4317 if ($descs{$_[0]." ".$current_lang}) {
4318 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4320 elsif ($descs{$_[0]}) {
4321 $rv{'desc'} = $descs{$_[0]};
4325 # Apply per-user description overridde
4326 my %gaccess = &get_module_acl(undef, "");
4327 if ($gaccess{'desc_'.$_[0]}) {
4328 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4332 if ($rv{'longdesc'}) {
4333 # All standard modules have an index.cgi
4334 $rv{'index_link'} = 'index.cgi';
4337 # Call theme-specific override function
4338 if (defined(&theme_get_module_info)) {
4339 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4345 =head2 get_all_module_infos(cachemode)
4347 Returns a list contains the information on all modules in this webmin
4348 install, including clones. Uses caching to reduce the number of module.info
4349 files that need to be read. Each element of the array is a hash reference
4350 in the same format as returned by get_module_info. The cache mode flag can be :
4351 0 = read and write, 1 = don't read or write, 2 = read only
4354 sub get_all_module_infos
4358 # Is the cache out of date? (ie. have any of the root's changed?)
4359 my $cache_file = "$config_directory/module.infos.cache";
4361 if (&read_file_cached($cache_file, \%cache)) {
4362 foreach my $r (@root_directories) {
4364 if ($st[9] != $cache{'mtime_'.$r}) {
4374 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4375 # Can use existing module.info cache
4377 foreach my $k (keys %cache) {
4378 if ($k =~ /^(\S+) (\S+)$/) {
4379 $mods{$1}->{$2} = $cache{$k};
4382 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4385 # Need to rebuild cache
4387 foreach my $r (@root_directories) {
4389 foreach my $m (readdir(DIR)) {
4390 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4391 my %minfo = &get_module_info($m, 0, 1);
4392 next if (!%minfo || !$minfo{'dir'});
4394 foreach $k (keys %minfo) {
4395 $cache{"${m} ${k}"} = $minfo{$k};
4400 $cache{'mtime_'.$r} = $st[9];
4402 $cache{'lang'} = $current_lang;
4403 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4406 # Override descriptions for modules for current user
4407 my %gaccess = &get_module_acl(undef, "");
4408 foreach my $m (@rv) {
4409 if ($gaccess{"desc_".$m->{'dir'}}) {
4410 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4414 # Apply installed flags
4416 &read_file_cached("$config_directory/installed.cache", \%installed);
4417 foreach my $m (@rv) {
4418 $m->{'installed'} = $installed{$m->{'dir'}};
4424 =head2 get_theme_info(theme)
4426 Returns a hash containing a theme's details, taken from it's theme.info file.
4427 Some useful keys are :
4429 =item dir - The theme directory, like blue-theme.
4431 =item desc - Human-readable description, in the current users' language.
4433 =item version - Optional module version number.
4435 =item os_support - List of supported operating systems and versions.
4440 return () if ($_[0] =~ /^\./);
4442 my $tdir = &module_root_directory($_[0]);
4443 &read_file("$tdir/theme.info", \%rv) || return ();
4444 foreach my $o (@lang_order_list) {
4445 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4451 =head2 list_languages
4453 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4454 Each is a hash reference with the following keys :
4456 =item lang - The short language code, like es for Spanish.
4458 =item desc - A human-readable description, in English.
4460 =item charset - An optional character set to use when displaying the language.
4462 =item titles - Set to 1 only if Webmin has title images for the language.
4464 =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.
4469 if (!@main::list_languages_cache) {
4472 open(LANG, "$root_directory/lang_list.txt");
4474 if (/^(\S+)\s+(.*)/) {
4475 my $l = { 'desc' => $2 };
4476 foreach $o (split(/,/, $1)) {
4477 if ($o =~ /^([^=]+)=(.*)$/) {
4481 $l->{'index'} = scalar(@rv);
4482 push(@main::list_languages_cache, $l);
4486 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4487 @main::list_languages_cache;
4489 return @main::list_languages_cache;
4492 =head2 read_env_file(file, &hash)
4494 Similar to Webmin's read_file function, but handles files containing shell
4495 environment variables formatted like :
4500 The file parameter is the full path to the file to read, and hash a Perl hash
4501 ref to read names and values into.
4507 &open_readfile(FILE, $_[0]) || return 0;
4510 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4511 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4512 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4520 =head2 write_env_file(file, &hash, [export])
4522 Writes out a hash to a file in name='value' format, suitable for use in a shell
4523 script. The parameters are :
4525 =item file - Full path for a file to write to
4527 =item hash - Hash reference of names and values to write.
4529 =item export - If set to 1, preceed each variable setting with the word 'export'.
4534 my $exp = $_[2] ? "export " : "";
4535 &open_tempfile(FILE, ">$_[0]");
4536 foreach my $k (keys %{$_[1]}) {
4537 my $v = $_[1]->{$k};
4538 if ($v =~ /^\S+$/) {
4539 &print_tempfile(FILE, "$exp$k=$v\n");
4542 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4545 &close_tempfile(FILE);
4548 =head2 lock_file(filename, [readonly], [forcefile])
4550 Lock a file for exclusive access. If the file is already locked, spin
4551 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4552 to work OK. The parameters are :
4554 =item filename - File or directory to lock.
4556 =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.
4558 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4563 my $realfile = &translate_filename($_[0]);
4564 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4565 my $no_lock = !&can_lock_file($realfile);
4566 my $lock_tries_count = 0;
4569 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4574 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4577 # Create the .lock file
4578 open(LOCKING, ">$realfile.lock") || return 0;
4579 my $lck = eval "flock(LOCKING, 2+4)";
4581 # Lock of lock file failed! Wait till later
4584 print LOCKING $$,"\n";
4585 eval "flock(LOCKING, 8)";
4588 $main::locked_file_list{$realfile} = int($_[1]);
4589 push(@main::temporary_files, "$realfile.lock");
4590 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4591 !&get_module_variable('$no_log_file_changes') &&
4593 # Grab a copy of this file for later diffing
4595 $main::locked_file_data{$realfile} = undef;
4597 $main::locked_file_type{$realfile} = 1;
4598 $main::locked_file_data{$realfile} = '';
4600 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4601 $main::locked_file_type{$realfile} = 2;
4602 $main::locked_file_data{$realfile} = $lnk;
4604 elsif (open(ORIGFILE, $realfile)) {
4605 $main::locked_file_type{$realfile} = 0;
4606 $main::locked_file_data{$realfile} = '';
4609 $main::locked_file_data{$realfile} .=$_;
4618 if ($lock_tries_count++ > 5*60) {
4619 # Give up after 5 minutes
4620 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4626 =head2 unlock_file(filename)
4628 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4629 file changes is enabled, then at unlock file a diff will be taken between the
4630 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4631 called. This can then be viewed in the Webmin Actions Log module.
4636 my $realfile = &translate_filename($_[0]);
4637 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4638 unlink("$realfile.lock") if (&can_lock_file($realfile));
4639 delete($main::locked_file_list{$realfile});
4640 if (exists($main::locked_file_data{$realfile})) {
4641 # Diff the new file with the old
4643 my $lnk = readlink($realfile);
4644 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4645 my $oldtype = $main::locked_file_type{$realfile};
4646 my $new = !defined($main::locked_file_data{$realfile});
4647 if ($new && !-e _) {
4648 # file doesn't exist, and never did! do nothing ..
4650 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4651 # is (or was) a directory ..
4652 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4653 push(@main::locked_file_diff,
4654 { 'type' => 'mkdir', 'object' => $realfile });
4656 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4657 push(@main::locked_file_diff,
4658 { 'type' => 'rmdir', 'object' => $realfile });
4661 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4662 # is (or was) a symlink ..
4663 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4664 push(@main::locked_file_diff,
4665 { 'type' => 'symlink', 'object' => $realfile,
4668 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4669 push(@main::locked_file_diff,
4670 { 'type' => 'unsymlink', 'object' => $realfile,
4671 'data' => $main::locked_file_data{$realfile} });
4673 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4674 push(@main::locked_file_diff,
4675 { 'type' => 'resymlink', 'object' => $realfile,
4680 # is a file, or has changed type?!
4681 my ($diff, $delete_file);
4682 my $type = "modify";
4684 open(NEWFILE, ">$realfile");
4689 if (!defined($main::locked_file_data{$realfile})) {
4692 open(ORIGFILE, ">$realfile.webminorig");
4693 print ORIGFILE $main::locked_file_data{$realfile};
4695 $diff = &backquote_command(
4696 "diff ".quotemeta("$realfile.webminorig")." ".
4697 quotemeta($realfile)." 2>/dev/null");
4698 push(@main::locked_file_diff,
4699 { 'type' => $type, 'object' => $realfile,
4700 'data' => $diff } ) if ($diff);
4701 unlink("$realfile.webminorig");
4702 unlink($realfile) if ($delete_file);
4705 if ($gconfig{'logfullfiles'}) {
4706 # Add file details to list of those to fully log
4707 $main::orig_file_data{$realfile} ||=
4708 $main::locked_file_data{$realfile};
4709 $main::orig_file_type{$realfile} ||=
4710 $main::locked_file_type{$realfile};
4713 delete($main::locked_file_data{$realfile});
4714 delete($main::locked_file_type{$realfile});
4718 =head2 test_lock(file)
4720 Returns 1 if some file is currently locked, 0 if not.
4725 my $realfile = &translate_filename($_[0]);
4726 return 0 if (!$_[0]);
4727 return 1 if (defined($main::locked_file_list{$realfile}));
4728 return 0 if (!&can_lock_file($realfile));
4730 if (open(LOCKING, "$realfile.lock")) {
4735 return $pid && kill(0, $pid);
4738 =head2 unlock_all_files
4740 Unlocks all files locked by the current script.
4743 sub unlock_all_files
4745 foreach $f (keys %main::locked_file_list) {
4750 =head2 can_lock_file(file)
4752 Returns 1 if some file should be locked, based on the settings in the
4753 Webmin Configuration module. For internal use by lock_file only.
4758 if (&is_readonly_mode()) {
4759 return 0; # never lock in read-only mode
4761 elsif ($gconfig{'lockmode'} == 0) {
4764 elsif ($gconfig{'lockmode'} == 1) {
4768 # Check if under any of the directories
4770 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4771 if (&same_file($d, $_[0]) ||
4772 &is_under_directory($d, $_[0])) {
4776 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4780 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4782 Log some action taken by a user. This is typically called at the end of a
4783 script, once all file changes are complete and all commands run. The
4786 =item action - A short code for the action being performed, like 'create'.
4788 =item type - A code for the type of object the action is performed to, like 'user'.
4790 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4792 =item params - A hash ref of additional information about the action.
4794 =item module - Name of the module in which the action was performed, which defaults to the current module.
4796 =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.
4798 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4800 =item client-ip - IP address of the browser that performed the action.
4805 return if (!$gconfig{'log'} || &is_readonly_mode());
4806 my $m = $_[4] ? $_[4] : &get_module_name();
4808 if ($gconfig{'logclear'}) {
4809 # check if it is time to clear the log
4810 my @st = stat("$webmin_logfile.time");
4811 my $write_logtime = 0;
4813 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4814 # clear logfile and all diff files
4815 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4816 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4817 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4818 unlink($webmin_logfile);
4825 if ($write_logtime) {
4826 open(LOGTIME, ">$webmin_logfile.time");
4827 print LOGTIME time(),"\n";
4832 # If an action script directory is defined, call the appropriate scripts
4833 if ($gconfig{'action_script_dir'}) {
4834 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4835 my ($basedir) = $gconfig{'action_script_dir'};
4837 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4840 opendir(DIR, $dir) or die "Can't open $dir: $!";
4841 while (defined($file = readdir(DIR))) {
4842 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4843 if (-x "$dir/$file") {
4844 # Call a script notifying it of the action
4846 $ENV{'ACTION_MODULE'} = &get_module_name();
4847 $ENV{'ACTION_ACTION'} = $_[0];
4848 $ENV{'ACTION_TYPE'} = $_[1];
4849 $ENV{'ACTION_OBJECT'} = $_[2];
4850 $ENV{'ACTION_SCRIPT'} = $script_name;
4851 foreach my $p (keys %param) {
4852 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4854 system("$dir/$file", @_,
4855 "<$null_file", ">$null_file", "2>&1");
4863 # should logging be done at all?
4864 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4865 split(/\s+/, $gconfig{'logusers'})) < 0);
4866 return if ($gconfig{'logmodules'} && &indexof($m,
4867 split(/\s+/, $gconfig{'logmodules'})) < 0);
4871 my @tm = localtime($now);
4872 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4873 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4874 $main::action_id_count++;
4875 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4876 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4877 $tm[2], $tm[1], $tm[0],
4878 $remote_user || '-',
4879 $main::session_id || '-',
4880 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4881 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4882 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4884 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4885 my $v = $_[3]->{$k};
4891 elsif (ref($v) eq 'ARRAY') {
4895 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4896 $line .= " $k='$vv'";
4900 foreach $vv (split(/\0/, $v)) {
4902 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4903 $line .= " $k='$vv'";
4906 $param{$k} = join(" ", @pv);
4908 open(WEBMINLOG, ">>$webmin_logfile");
4909 print WEBMINLOG $line,"\n";
4911 if ($gconfig{'logperms'}) {
4912 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4915 chmod(0600, $webmin_logfile);
4918 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4919 # Find and record the changes made to any locked files, or commands run
4921 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4922 foreach my $d (@main::locked_file_diff) {
4923 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4924 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4925 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4926 print DIFFLOG $d->{'data'};
4928 if ($d->{'input'}) {
4929 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4930 print DIFFLOG $d->{'input'};
4933 if ($gconfig{'logperms'}) {
4934 chmod(oct($gconfig{'logperms'}),
4935 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4936 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4940 @main::locked_file_diff = undef;
4942 if ($gconfig{'logfullfiles'}) {
4943 # Save the original contents of any modified files
4945 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4946 foreach my $f (keys %main::orig_file_data) {
4947 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4948 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4949 if (!defined($main::orig_file_type{$f})) {
4950 print ORIGLOG -1," ",$f,"\n";
4953 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4955 print ORIGLOG $main::orig_file_data{$f};
4957 if ($gconfig{'logperms'}) {
4958 chmod(oct($gconfig{'logperms'}),
4959 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4963 %main::orig_file_data = undef;
4964 %main::orig_file_type = undef;
4968 if ($gconfig{'logsyslog'}) {
4969 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4970 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4971 setlogsock("inet");';
4973 # Syslog module is installed .. try to convert to a
4974 # human-readable form
4976 my $mod = &get_module_name();
4977 my $mdir = module_root_directory($mod);
4978 if (-r "$mdir/log_parser.pl") {
4979 &foreign_require($mod, "log_parser.pl");
4981 foreach my $k (keys %{$_[3]}) {
4982 my $v = $_[3]->{$k};
4983 if (ref($v) eq 'ARRAY') {
4984 $params{$k} = join("\0", @$v);
4990 $msg = &foreign_call($mod, "parse_webmin_log",
4991 $remote_user, $script_name,
4992 $_[0], $_[1], $_[2], \%params);
4993 $msg =~ s/<[^>]*>//g; # Remove tags
4995 elsif ($_[0] eq "_config_") {
4996 my %wtext = &load_language("webminlog");
4997 $msg = $wtext{'search_config'};
4999 $msg ||= "$_[0] $_[1] $_[2]";
5000 my %info = &get_module_info($m);
5001 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5006 =head2 additional_log(type, object, data, [input])
5008 Records additional log data for an upcoming call to webmin_log, such
5009 as a command that was run or SQL that was executed. Typically you will never
5010 need to call this function directory.
5015 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5016 push(@main::locked_file_diff,
5017 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5018 'input' => $_[3] } );
5022 =head2 webmin_debug_log(type, message)
5024 Write something to the Webmin debug log. For internal use only.
5027 sub webmin_debug_log
5029 my ($type, $msg) = @_;
5030 return 0 if (!$main::opened_debug_log);
5031 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5032 if ($gconfig{'debug_modules'}) {
5033 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5034 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5037 my @tm = localtime($now);
5039 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
5040 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5041 $tm[2], $tm[1], $tm[0],
5042 $remote_user || "-",
5043 $ENV{'REMOTE_HOST'} || "-",
5044 &get_module_name() || "-",
5047 seek(main::DEBUGLOG, 0, 2);
5048 print main::DEBUGLOG $line."\n";
5052 =head2 system_logged(command)
5054 Just calls the Perl system() function, but also logs the command run.
5059 if (&is_readonly_mode()) {
5060 print STDERR "Vetoing command $_[0]\n";
5063 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5064 my $cmd = join(" ", @realcmd);
5066 if ($cmd =~ s/(\s*&\s*)$//) {
5069 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5070 $cmd =~ s/^\((.*)\)\s*$/$1/;
5072 &additional_log('exec', undef, $cmd);
5073 return system(@realcmd);
5076 =head2 backquote_logged(command)
5078 Executes a command and returns the output (like `command`), but also logs it.
5081 sub backquote_logged
5083 if (&is_readonly_mode()) {
5085 print STDERR "Vetoing command $_[0]\n";
5088 my $realcmd = &translate_command($_[0]);
5091 if ($cmd =~ s/(\s*&\s*)$//) {
5094 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5095 $cmd =~ s/^\((.*)\)\s*$/$1/;
5097 &additional_log('exec', undef, $cmd);
5098 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5102 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5104 Runs some command, waiting at most the given number of seconds for it to
5105 complete, and returns the output. The maxlines parameter sets the number
5106 of lines of output to capture. The safe parameter should be set to 1 if the
5107 command is safe for read-only mode users to run.
5110 sub backquote_with_timeout
5112 my $realcmd = &translate_command($_[0]);
5113 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5114 if ($gconfig{'debug_what_cmd'});
5116 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5121 my $elapsed = time() - $start;
5122 last if ($elapsed > $_[1]);
5124 vec($rmask, fileno(OUT), 1) = 1;
5125 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5126 last if (!$sel || $sel < 0);
5128 last if (!defined($line));
5131 if ($_[3] && $linecount >= $_[3]) {
5136 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5140 return wantarray ? ($out, $timed_out) : $out;
5143 =head2 backquote_command(command, safe?)
5145 Executes a command and returns the output (like `command`), subject to
5146 command translation. The safe parameter should be set to 1 if the command
5147 is safe for read-only mode users to run.
5150 sub backquote_command
5152 if (&is_readonly_mode() && !$_[1]) {
5153 print STDERR "Vetoing command $_[0]\n";
5157 my $realcmd = &translate_command($_[0]);
5158 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5162 =head2 kill_logged(signal, pid, ...)
5164 Like Perl's built-in kill function, but also logs the fact that some process
5165 was killed. On Windows, falls back to calling process.exe to terminate a
5171 return scalar(@_)-1 if (&is_readonly_mode());
5172 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5173 if ($gconfig{'debug_what_procs'});
5174 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5175 if ($gconfig{'os_type'} eq 'windows') {
5176 # Emulate some kills with process.exe
5177 my $arg = $_[0] eq "KILL" ? "-k" :
5178 $_[0] eq "TERM" ? "-q" :
5179 $_[0] eq "STOP" ? "-s" :
5180 $_[0] eq "CONT" ? "-r" : undef;
5182 foreach my $p (@_[1..@_-1]) {
5184 $ok ||= kill($_[0], $p);
5187 &execute_command("process $arg $p");
5199 =head2 rename_logged(old, new)
5201 Re-names a file and logs the rename. If the old and new files are on different
5202 filesystems, calls mv or the Windows rename function to do the job.
5207 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5208 return &rename_file($_[0], $_[1]);
5211 =head2 rename_file(old, new)
5213 Renames a file or directory. If the old and new files are on different
5214 filesystems, calls mv or the Windows rename function to do the job.
5219 if (&is_readonly_mode()) {
5220 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5223 my $src = &translate_filename($_[0]);
5224 my $dst = &translate_filename($_[1]);
5225 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5226 if ($gconfig{'debug_what_ops'});
5227 my $ok = rename($src, $dst);
5228 if (!$ok && $! !~ /permission/i) {
5229 # Try the mv command, in case this is a cross-filesystem rename
5230 if ($gconfig{'os_type'} eq 'windows') {
5231 # Need to use rename
5232 my $out = &backquote_command("rename ".quotemeta($_[0]).
5233 " ".quotemeta($_[1])." 2>&1");
5235 $! = $out if (!$ok);
5239 my $out = &backquote_command("mv ".quotemeta($_[0]).
5240 " ".quotemeta($_[1])." 2>&1");
5242 $! = $out if (!$ok);
5248 =head2 symlink_logged(src, dest)
5250 Create a symlink, and logs it. Effectively does the same thing as the Perl
5257 my $rv = &symlink_file($_[0], $_[1]);
5258 &unlock_file($_[1]);
5262 =head2 symlink_file(src, dest)
5264 Creates a soft link, unless in read-only mode. Effectively does the same thing
5265 as the Perl symlink function.
5270 if (&is_readonly_mode()) {
5271 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5274 my $src = &translate_filename($_[0]);
5275 my $dst = &translate_filename($_[1]);
5276 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5277 if ($gconfig{'debug_what_ops'});
5278 return symlink($src, $dst);
5281 =head2 link_file(src, dest)
5283 Creates a hard link, unless in read-only mode. The existing new link file
5284 will be deleted if necessary. Effectively the same as Perl's link function.
5289 if (&is_readonly_mode()) {
5290 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5293 my $src = &translate_filename($_[0]);
5294 my $dst = &translate_filename($_[1]);
5295 &webmin_debug_log('LINK', "src=$src dst=$dst")
5296 if ($gconfig{'debug_what_ops'});
5297 unlink($dst); # make sure link works
5298 return link($src, $dst);
5301 =head2 make_dir(dir, perms, recursive)
5303 Creates a directory and sets permissions on it, unless in read-only mode.
5304 The perms parameter sets the octal permissions to apply, which unlike Perl's
5305 mkdir will really get set. The recursive flag can be set to 1 to have the
5306 function create parent directories too.
5311 my ($dir, $perms, $recur) = @_;
5312 if (&is_readonly_mode()) {
5313 print STDERR "Vetoing directory $dir\n";
5316 $dir = &translate_filename($dir);
5317 my $exists = -d $dir ? 1 : 0;
5318 return 1 if ($exists && $recur); # already exists
5319 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5320 my $rv = mkdir($dir, $perms);
5321 if (!$rv && $recur) {
5322 # Failed .. try mkdir -p
5323 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5324 my $ex = &execute_command("mkdir $param "."e_path($dir));
5330 chmod($perms, $dir);
5335 =head2 set_ownership_permissions(user, group, perms, file, ...)
5337 Sets the user, group owner and permissions on some files. The parameters are :
5339 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5341 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5343 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5345 =item file - One or more files or directories to modify.
5348 sub set_ownership_permissions
5350 my ($user, $group, $perms, @files) = @_;
5351 if (&is_readonly_mode()) {
5352 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5355 @files = map { &translate_filename($_) } @files;
5356 if ($gconfig{'debug_what_ops'}) {
5357 foreach my $f (@files) {
5358 &webmin_debug_log('PERMS',
5359 "file=$f user=$user group=$group perms=$perms");
5363 if (defined($user)) {
5364 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5366 if (defined($group)) {
5367 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5370 my @uinfo = getpwuid($uid);
5373 $rv = chown($uid, $gid, @files);
5375 if ($rv && defined($perms)) {
5376 $rv = chmod($perms, @files);
5381 =head2 unlink_logged(file, ...)
5383 Like Perl's unlink function, but locks the files beforehand and un-locks them
5384 after so that the deletion is logged by Webmin.
5390 foreach my $f (@_) {
5391 if (!&test_lock($f)) {
5396 my @rv = &unlink_file(@_);
5397 foreach my $f (@_) {
5402 return wantarray ? @rv : $rv[0];
5405 =head2 unlink_file(file, ...)
5407 Deletes some files or directories. Like Perl's unlink function, but also
5408 recursively deletes directories with the rm command if needed.
5413 return 1 if (&is_readonly_mode());
5416 foreach my $f (@_) {
5417 &unflush_file_lines($f);
5418 my $realf = &translate_filename($f);
5419 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5421 if (!rmdir($realf)) {
5423 if ($gconfig{'os_type'} eq 'windows') {
5424 # Call del and rmdir commands
5427 my $out = `del /q "$qm" 2>&1`;
5429 $out = `rmdir "$qm" 2>&1`;
5434 my $qm = quotemeta($realf);
5435 $out = `rm -rf $qm 2>&1`;
5444 if (!unlink($realf)) {
5450 return wantarray ? ($rv, $err) : $rv;
5453 =head2 copy_source_dest(source, dest)
5455 Copy some file or directory to a new location. Returns 1 on success, or 0
5456 on failure - also sets $! on failure. If the source is a directory, uses
5457 piped tar commands to copy a whole directory structure including permissions
5461 sub copy_source_dest
5463 return (1, undef) if (&is_readonly_mode());
5464 my ($src, $dst) = @_;
5467 &webmin_debug_log('COPY', "src=$src dst=$dst")
5468 if ($gconfig{'debug_what_ops'});
5469 if ($gconfig{'os_type'} eq 'windows') {
5470 # No tar or cp on windows, so need to use copy command
5474 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5477 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5485 # A directory .. need to copy with tar command
5486 my @st = stat($src);
5489 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5490 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5497 # Can just copy with cp
5498 my $out = &backquote_logged("cp -p ".quotemeta($src).
5499 " ".quotemeta($dst)." 2>&1");
5505 return wantarray ? ($ok, $err) : $ok;
5508 =head2 remote_session_name(host|&server)
5510 Generates a session ID for some server. For this server, this will always
5511 be an empty string. For a server object it will include the hostname and
5512 port and PID. For a server name, it will include the hostname and PID. For
5516 sub remote_session_name
5518 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5519 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5520 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5521 ref($_[0]) ? "" : "$_[0].$$";
5524 =head2 remote_foreign_require(server, module, file)
5526 Connects to rpc.cgi on a remote webmin server and have it open a session
5527 to a process that will actually do the require and run functions. This is the
5528 equivalent for foreign_require, but for a remote Webmin system. The server
5529 parameter can either be a hostname of a system registered in the Webmin
5530 Servers Index module, or a hash reference for a system from that module.
5533 sub remote_foreign_require
5535 my $call = { 'action' => 'require',
5538 my $sn = &remote_session_name($_[0]);
5539 if ($remote_session{$sn}) {
5540 $call->{'session'} = $remote_session{$sn};
5543 $call->{'newsession'} = 1;
5545 my $rv = &remote_rpc_call($_[0], $call);
5546 if ($rv->{'session'}) {
5547 $remote_session{$sn} = $rv->{'session'};
5548 $remote_session_server{$sn} = $_[0];
5552 =head2 remote_foreign_call(server, module, function, [arg]*)
5554 Call a function on a remote server. Must have been setup first with
5555 remote_foreign_require for the same server and module. Equivalent to
5556 foreign_call, but with the extra server parameter to specify the remote
5560 sub remote_foreign_call
5562 return undef if (&is_readonly_mode());
5563 my $sn = &remote_session_name($_[0]);
5564 return &remote_rpc_call($_[0], { 'action' => 'call',
5567 'session' => $remote_session{$sn},
5568 'args' => [ @_[3 .. $#_] ] } );
5571 =head2 remote_foreign_check(server, module, [api-only])
5573 Checks if some module is installed and supported on a remote server. Equivilant
5574 to foreign_check, but for the remote Webmin system specified by the server
5578 sub remote_foreign_check
5580 return &remote_rpc_call($_[0], { 'action' => 'check',
5585 =head2 remote_foreign_config(server, module)
5587 Gets the configuration for some module from a remote server, as a hash.
5588 Equivalent to foreign_config, but for a remote system.
5591 sub remote_foreign_config
5593 return &remote_rpc_call($_[0], { 'action' => 'config',
5594 'module' => $_[1] });
5597 =head2 remote_eval(server, module, code)
5599 Evaluates some perl code in the context of a module on a remote webmin server.
5600 The server parameter must be the hostname of a remote system, module must
5601 be a module directory name, and code a string of Perl code to run. This can
5602 only be called after remote_foreign_require for the same server and module.
5607 return undef if (&is_readonly_mode());
5608 my $sn = &remote_session_name($_[0]);
5609 return &remote_rpc_call($_[0], { 'action' => 'eval',
5612 'session' => $remote_session{$sn} });
5615 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5617 Transfers some local file to another server via Webmin's RPC protocol, and
5618 returns the resulting remote filename. If the remotefile parameter is given,
5619 that is the destination filename which will be used. Otherwise a randomly
5620 selected temporary filename will be used, and returned by the function.
5625 return undef if (&is_readonly_mode());
5627 my $sn = &remote_session_name($_[0]);
5628 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5629 # Copy data over TCP connection
5630 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5632 'name' => $_[3] } );
5634 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5635 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5636 return &$main::remote_error_handler("Failed to transfer file : $error")
5639 while(read(FILE, $got, 1024) > 0) {
5643 shutdown(TWRITE, 1);
5645 if ($error && $error !~ /^OK/) {
5646 # Got back an error!
5647 return &$main::remote_error_handler("Failed to transfer file : $error");
5653 # Just pass file contents as parameters
5655 while(read(FILE, $got, 1024) > 0) {
5659 return &remote_rpc_call($_[0], { 'action' => 'write',
5662 'session' => $remote_session{$sn} });
5666 =head2 remote_read(server, localfile, remotefile)
5668 Transfers a file from a remote server to this system, using Webmin's RPC
5669 protocol. The server parameter must be the hostname of a system registered
5670 in the Webmin Servers Index module, localfile is the destination path on this
5671 system, and remotefile is the file to fetch from the remote server.
5676 my $sn = &remote_session_name($_[0]);
5677 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5678 # Copy data over TCP connection
5679 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5680 'file' => $_[2] } );
5682 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5685 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5686 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5687 return &$main::remote_error_handler("Failed to transfer file : $error")
5690 open(FILE, ">$_[1]");
5691 while(read(TREAD, $got, 1024) > 0) {
5698 # Just get data as return value
5699 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5701 'session' => $remote_session{$sn} });
5702 open(FILE, ">$_[1]");
5708 =head2 remote_finished
5710 Close all remote sessions. This happens automatically after a while
5711 anyway, but this function should be called to clean things up faster.
5716 foreach my $sn (keys %remote_session) {
5717 my $server = $remote_session_server{$sn};
5718 &remote_rpc_call($server, { 'action' => 'quit',
5719 'session' => $remote_session{$sn} } );
5720 delete($remote_session{$sn});
5721 delete($remote_session_server{$sn});
5723 foreach $fh (keys %fast_fh_cache) {
5725 delete($fast_fh_cache{$fh});
5729 =head2 remote_error_setup(&function)
5731 Sets a function to be called instead of &error when a remote RPC operation
5732 fails. Useful if you want to have more control over your remote operations.
5735 sub remote_error_setup
5737 $main::remote_error_handler = $_[0] || \&error;
5740 =head2 remote_rpc_call(server, structure)
5742 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5743 and then reads back a reply structure. This is mainly for internal use only,
5744 and is called by the other remote_* functions.
5750 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5752 # Server structure was given
5754 $serv->{'user'} || $serv->{'id'} == 0 ||
5755 return &$main::remote_error_handler(
5756 "No Webmin login set for server");
5759 # lookup the server in the webmin servers module if needed
5760 if (!%main::remote_servers_cache) {
5761 &foreign_require("servers", "servers-lib.pl");
5762 foreach $s (&foreign_call("servers", "list_servers")) {
5763 $main::remote_servers_cache{$s->{'host'}} = $s;
5764 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5767 $serv = $main::remote_servers_cache{$_[0]};
5768 $serv || return &$main::remote_error_handler(
5769 "No Webmin Servers entry for $_[0]");
5770 $serv->{'user'} || return &$main::remote_error_handler(
5771 "No login set for server $_[0]");
5773 my $ip = $serv->{'ip'} || $serv->{'host'};
5775 # Work out the username and password
5777 if ($serv->{'sameuser'}) {
5778 $user = $remote_user;
5779 defined($main::remote_pass) || return &$main::remote_error_handler(
5780 "Password for this server is not available");
5781 $pass = $main::remote_pass;
5784 $user = $serv->{'user'};
5785 $pass = $serv->{'pass'};
5788 if ($serv->{'fast'} || !$sn) {
5789 # Make TCP connection call to fastrpc.cgi
5790 if (!$fast_fh_cache{$sn} && $sn) {
5791 # Need to open the connection
5792 my $con = &make_http_connection(
5793 $ip, $serv->{'port'}, $serv->{'ssl'},
5794 "POST", "/fastrpc.cgi");
5795 return &$main::remote_error_handler(
5796 "Failed to connect to $serv->{'host'} : $con")
5798 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5799 &write_http_connection($con, "User-agent: Webmin\r\n");
5800 my $auth = &encode_base64("$user:$pass");
5802 &write_http_connection($con, "Authorization: basic $auth\r\n");
5803 &write_http_connection($con, "Content-length: ",
5804 length($tostr),"\r\n");
5805 &write_http_connection($con, "\r\n");
5806 &write_http_connection($con, $tostr);
5808 # read back the response
5809 my $line = &read_http_connection($con);
5810 $line =~ tr/\r\n//d;
5811 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5812 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5814 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5815 return &$main::remote_error_handler("HTTP error : $line");
5817 $line = &read_http_connection($con);
5818 $line =~ tr/\r\n//d;
5820 $line = &read_http_connection($con);
5821 if ($line =~ /^0\s+(.*)/) {
5822 return &$main::remote_error_handler("RPC error : $1");
5824 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5825 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5826 # Started ok .. connect and save SID
5827 &close_http_connection($con);
5828 my ($port, $sid, $version, $error) = ($1, $2, $3);
5829 &open_socket($ip, $port, $sid, \$error);
5830 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5832 $fast_fh_cache{$sn} = $sid;
5833 $remote_server_version{$sn} = $version;
5836 while($stuff = &read_http_connection($con)) {
5839 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5842 elsif (!$fast_fh_cache{$sn}) {
5843 # Open the connection by running fastrpc.cgi locally
5844 pipe(RPCOUTr, RPCOUTw);
5848 open(STDOUT, ">&RPCOUTw");
5852 $ENV{'REQUEST_METHOD'} = 'GET';
5853 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5854 $ENV{'SERVER_ROOT'} ||= $root_directory;
5856 if ($base_remote_user ne 'root' &&
5857 $base_remote_user ne 'admin') {
5858 # Need to fake up a login for the CGI!
5859 &read_acl(undef, \%acl);
5860 $ENV{'BASE_REMOTE_USER'} =
5861 $ENV{'REMOTE_USER'} =
5862 $acl{'root'} ? 'root' : 'admin';
5864 delete($ENV{'FOREIGN_MODULE_NAME'});
5865 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5866 chdir($root_directory);
5867 if (!exec("$root_directory/fastrpc.cgi")) {
5868 print "exec failed : $!\n";
5875 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5879 if ($line =~ /^0\s+(.*)/) {
5880 return &$main::remote_error_handler("RPC error : $2");
5882 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5883 # Started ok .. connect and save SID
5885 my ($port, $sid, $error) = ($1, $2, undef);
5886 &open_socket("localhost", $port, $sid, \$error);
5887 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5888 $fast_fh_cache{$sn} = $sid;
5895 &error("Bad response from fastrpc.cgi : $line");
5898 # Got a connection .. send off the request
5899 my $fh = $fast_fh_cache{$sn};
5900 my $tostr = &serialise_variable($_[1]);
5901 print $fh length($tostr)," $fh\n";
5903 my $rlen = int(<$fh>);
5904 my ($fromstr, $got);
5905 while(length($fromstr) < $rlen) {
5906 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5907 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5910 my $from = &unserialise_variable($fromstr);
5912 return &$main::remote_error_handler("Remote Webmin error");
5914 if (defined($from->{'arv'})) {
5915 return @{$from->{'arv'}};
5918 return $from->{'rv'};
5922 # Call rpc.cgi on remote server
5923 my $tostr = &serialise_variable($_[1]);
5925 my $con = &make_http_connection($ip, $serv->{'port'},
5926 $serv->{'ssl'}, "POST", "/rpc.cgi");
5927 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5929 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5930 &write_http_connection($con, "User-agent: Webmin\r\n");
5931 my $auth = &encode_base64("$user:$pass");
5933 &write_http_connection($con, "Authorization: basic $auth\r\n");
5934 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5935 &write_http_connection($con, "\r\n");
5936 &write_http_connection($con, $tostr);
5938 # read back the response
5939 my $line = &read_http_connection($con);
5940 $line =~ tr/\r\n//d;
5941 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5942 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5944 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5946 $line = &read_http_connection($con);
5947 $line =~ tr/\r\n//d;
5950 while($line = &read_http_connection($con)) {
5954 my $from = &unserialise_variable($fromstr);
5955 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5956 if (defined($from->{'arv'})) {
5957 return @{$from->{'arv'}};
5960 return $from->{'rv'};
5965 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5967 Executes some function in parallel on multiple servers at once. Fills in
5968 the returns and errors arrays respectively. If the module and library
5969 parameters are given, that module is remotely required on the server first,
5970 to check if it is connectable. The parameters are :
5972 =item servers - A list of Webmin system hash references.
5974 =item parallel - Number of parallel operations to perform.
5976 =item function - Reference to function to call for each system.
5978 =item args - Additional parameters to the function.
5980 =item returns - Array ref to place return values into, in same order as servers.
5982 =item errors - Array ref to place error messages into.
5984 =item module - Optional module to require on the remote system first.
5986 =item library - Optional library to require in the module.
5989 sub remote_multi_callback
5991 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5992 &remote_error_setup(\&remote_multi_callback_error);
5994 # Call the functions
5996 foreach my $g (@$servs) {
6002 $remote_multi_callback_err = undef;
6004 # Require the remote lib
6005 &remote_foreign_require($g->{'host'}, $mod, $lib);
6006 if ($remote_multi_callback_err) {
6007 # Failed .. return error
6008 print $wh &serialise_variable(
6009 [ undef, $remote_multi_callback_err ]);
6015 my $a = ref($args) ? $args->[$p] : $args;
6016 my $rv = &$func($g, $a);
6019 print $wh &serialise_variable(
6020 [ $rv, $remote_multi_callback_err ]);
6028 # Read back the results
6030 foreach my $g (@$servs) {
6034 $errs->[$p] = "Failed to read response from $g->{'host'}";
6037 my $rv = &unserialise_variable($line);
6039 $rets->[$p] = $rv->[0];
6040 $errs->[$p] = $rv->[1];
6045 &remote_error_setup(undef);
6048 sub remote_multi_callback_error
6050 $remote_multi_callback_err = $_[0];
6053 =head2 serialise_variable(variable)
6055 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6056 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6057 called on each member to serialize the entire object.
6060 sub serialise_variable
6062 if (!defined($_[0])) {
6068 $rv = &urlize($_[0]);
6070 elsif ($r eq 'SCALAR') {
6071 $rv = &urlize(${$_[0]});
6073 elsif ($r eq 'ARRAY') {
6074 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6076 elsif ($r eq 'HASH') {
6077 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6078 &urlize(&serialise_variable($_[0]->{$_})) }
6081 elsif ($r eq 'REF') {
6082 $rv = &serialise_variable(${$_[0]});
6084 elsif ($r eq 'CODE') {
6089 # An object - treat as a hash
6090 $r = "OBJECT ".&urlize($r);
6091 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6092 &urlize(&serialise_variable($_[0]->{$_})) }
6095 return ($r ? $r : 'VAL').",".$rv;
6098 =head2 unserialise_variable(string)
6100 Converts a string created by serialise_variable() back into the original
6101 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6102 object, the same class is used on this system, if available.
6105 sub unserialise_variable
6107 my @v = split(/,/, $_[0]);
6109 if ($v[0] eq 'VAL') {
6110 @v = split(/,/, $_[0], -1);
6111 $rv = &un_urlize($v[1]);
6113 elsif ($v[0] eq 'SCALAR') {
6114 local $r = &un_urlize($v[1]);
6117 elsif ($v[0] eq 'ARRAY') {
6119 for(my $i=1; $i<@v; $i++) {
6120 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6123 elsif ($v[0] eq 'HASH') {
6125 for(my $i=1; $i<@v; $i+=2) {
6126 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6127 &unserialise_variable(&un_urlize($v[$i+1]));
6130 elsif ($v[0] eq 'REF') {
6131 local $r = &unserialise_variable($v[1]);
6134 elsif ($v[0] eq 'UNDEF') {
6137 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6138 # An object hash that we have to re-bless
6141 for(my $i=1; $i<@v; $i+=2) {
6142 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6143 &unserialise_variable(&un_urlize($v[$i+1]));
6151 =head2 other_groups(user)
6153 Returns a list of secondary groups a user is a member of, as a list of
6162 while(my @g = getgrent()) {
6163 my @m = split(/\s+/, $g[3]);
6164 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6166 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6170 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6172 Returns HTML for a button that pops up a data chooser window. The parameters
6175 =item dayfield - Name of the text field to place the day of the month into.
6177 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6179 =item yearfield - Name of the text field to place the year into.
6182 sub date_chooser_button
6184 return &theme_date_chooser_button(@_)
6185 if (defined(&theme_date_chooser_button));
6186 my ($w, $h) = (250, 225);
6187 if ($gconfig{'db_sizedate'}) {
6188 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6190 return "<input type=button onClick='window.dfield = form.$_[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";
6193 =head2 help_file(module, file)
6195 Returns the path to a module's help file of some name, typically under the
6196 help directory with a .html extension.
6201 my $mdir = &module_root_directory($_[0]);
6202 my $dir = "$mdir/help";
6203 foreach my $o (@lang_order_list) {
6204 my $lang = "$dir/$_[1].$o.html";
6205 return $lang if (-r $lang);
6207 return "$dir/$_[1].html";
6212 Seeds the random number generator, if not already done in this script. On Linux
6213 this makes use of the current time, process ID and a read from /dev/urandom.
6214 On other systems, only the current time and process ID are used.
6219 if (!$main::done_seed_random) {
6220 if (open(RANDOM, "/dev/urandom")) {
6222 read(RANDOM, $buf, 4);
6224 srand(time() ^ $$ ^ $buf);
6229 $main::done_seed_random = 1;
6233 =head2 disk_usage_kb(directory)
6235 Returns the number of kB used by some directory and all subdirs. Implemented
6236 by calling the C<du -k> command.
6241 my $dir = &translate_filename($_[0]);
6243 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6245 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6247 return $out =~ /^([0-9]+)/ ? $1 : "???";
6250 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6252 Returns the number of bytes taken up by all files in some directory and all
6253 sub-directories, by summing up their lengths. The disk_usage_kb is more
6254 reflective of reality, as the filesystem typically pads file sizes to 1k or
6258 sub recursive_disk_usage
6260 my $dir = &translate_filename($_[0]);
6267 my @st = stat($dir);
6273 my @files = readdir(DIR);
6275 foreach my $f (@files) {
6276 next if ($f eq "." || $f eq "..");
6277 next if ($skip && $f =~ /$skip/);
6278 next if ($only && $f !~ /$only/);
6279 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6285 =head2 help_search_link(term, [ section, ... ] )
6287 Returns HTML for a link to the man module for searching local and online
6288 docs for various search terms. The term parameter can either be a single
6289 word like 'bind', or a space-separated list of words. This function is typically
6290 used by modules that want to refer users to additional documentation in man
6291 pages or local system doc files.
6294 sub help_search_link
6296 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6297 my $for = &urlize(shift(@_));
6298 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6299 join("&", map { "section=$_" } @_)."&".
6300 "for=$for&exact=1&check=".&get_module_name()."'>".
6301 $text{'helpsearch'}."</a>\n";
6308 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6310 Opens a connection to some HTTP server, maybe through a proxy, and returns
6311 a handle object. The handle can then be used to send additional headers
6312 and read back a response. If anything goes wrong, returns an error string.
6313 The parameters are :
6315 =item host - Hostname or IP address of the webserver to connect to.
6317 =item port - HTTP port number to connect to.
6319 =item ssl - Set to 1 to connect in SSL mode.
6321 =item method - HTTP method, like GET or POST.
6323 =item page - Page to request on the webserver, like /foo/index.html
6325 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6328 sub make_http_connection
6330 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6333 foreach my $h (@$headers) {
6334 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6338 if (&is_readonly_mode()) {
6339 return "HTTP connections not allowed in readonly mode";
6341 my $rv = { 'fh' => time().$$ };
6344 eval "use Net::SSLeay";
6345 $@ && return $text{'link_essl'};
6346 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6347 eval "Net::SSLeay::load_error_strings()";
6348 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6349 return "Failed to create SSL context";
6350 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6351 return "Failed to create SSL connection";
6353 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6354 !&no_proxy($host)) {
6357 &open_socket($1, $2, $rv->{'fh'}, \$error);
6360 my $fh = $rv->{'fh'};
6361 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6362 if ($gconfig{'proxy_user'}) {
6363 my $auth = &encode_base64(
6364 "$gconfig{'proxy_user'}:".
6365 "$gconfig{'proxy_pass'}");
6366 $auth =~ tr/\r\n//d;
6367 print $fh "Proxy-Authorization: Basic $auth\r\n";
6371 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6372 return "Proxy error : $3" if ($2 != 200);
6375 return "Proxy error : $line";
6380 elsif (!$gconfig{'proxy_fallback'}) {
6381 # Connection to proxy failed - give up
6388 &open_socket($host, $port, $rv->{'fh'}, \$error);
6389 return $error if ($error);
6391 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6392 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6393 return "SSL connect() failed";
6394 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6395 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6398 # Plain HTTP request
6400 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6401 !&no_proxy($host)) {
6404 &open_socket($1, $2, $rv->{'fh'}, \$error);
6408 my $fh = $rv->{'fh'};
6409 my $rtxt = $method." ".
6410 "http://$host:$port$page HTTP/1.0\r\n";
6411 if ($gconfig{'proxy_user'}) {
6412 my $auth = &encode_base64(
6413 "$gconfig{'proxy_user'}:".
6414 "$gconfig{'proxy_pass'}");
6415 $auth =~ tr/\r\n//d;
6416 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6421 elsif (!$gconfig{'proxy_fallback'}) {
6426 # Connecting directly
6428 &open_socket($host, $port, $rv->{'fh'}, \$error);
6429 return $error if ($error);
6430 my $fh = $rv->{'fh'};
6431 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6438 =head2 read_http_connection(&handle, [bytes])
6440 Reads either one line or up to the specified number of bytes from the handle,
6441 originally supplied by make_http_connection.
6444 sub read_http_connection
6448 if ($h->{'ssl_con'}) {
6451 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6452 # need to read more..
6453 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6455 $rv = $h->{'buffer'};
6456 delete($h->{'buffer'});
6459 $h->{'buffer'} .= $more;
6461 $rv = substr($h->{'buffer'}, 0, $idx+1);
6462 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6465 if (length($h->{'buffer'})) {
6466 $rv = $h->{'buffer'};
6467 delete($h->{'buffer'});
6470 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6476 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6479 my $fh = $h->{'fh'};
6483 $rv = undef if ($rv eq "");
6487 =head2 write_http_connection(&handle, [data+])
6489 Writes the given data to the given HTTP connection handle.
6492 sub write_http_connection
6495 my $fh = $h->{'fh'};
6497 if ($h->{'ssl_ctx'}) {
6498 foreach my $s (@_) {
6499 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6500 $allok = 0 if (!$ok);
6504 my $ok = (print $fh @_);
6505 $allok = 0 if (!$ok);
6510 =head2 close_http_connection(&handle)
6512 Closes a connection to an HTTP server, identified by the given handle.
6515 sub close_http_connection
6521 =head2 clean_environment
6523 Deletes any environment variables inherited from miniserv so that they
6524 won't be passed to programs started by webmin. This is useful when calling
6525 programs that check for CGI-related environment variables and modify their
6526 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6529 sub clean_environment
6531 %UNCLEAN_ENV = %ENV;
6532 foreach my $k (keys %ENV) {
6533 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6537 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6538 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6539 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6540 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6541 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6542 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6543 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6544 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6550 =head2 reset_environment
6552 Puts the environment back how it was before clean_environment was callled.
6555 sub reset_environment
6558 foreach my $k (keys %UNCLEAN_ENV) {
6559 $ENV{$k} = $UNCLEAN_ENV{$k};
6561 undef(%UNCLEAN_ENV);
6565 =head2 progress_callback
6567 Never called directly, but useful for passing to &http_download to print
6568 out progress of an HTTP request.
6571 sub progress_callback
6573 if (defined(&theme_progress_callback)) {
6574 # Call the theme override
6575 return &theme_progress_callback(@_);
6579 print $progress_callback_prefix;
6581 $progress_size = $_[1];
6582 $progress_step = int($_[1] / 10);
6583 print &text('progress_size2', $progress_callback_url,
6584 &nice_size($progress_size)),"<br>\n";
6587 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6589 $last_progress_time = $last_progress_size = undef;
6591 elsif ($_[0] == 3) {
6593 my $sp = $progress_callback_prefix.(" " x 5);
6594 if ($progress_size) {
6595 # And we have a size to compare against
6596 my $st = int(($_[1] * 10) / $progress_size);
6597 my $time_now = time();
6598 if ($st != $progress_step ||
6599 $time_now - $last_progress_time > 60) {
6600 # Show progress every 10% or 60 seconds
6601 print $sp,&text('progress_datan', &nice_size($_[1]),
6602 int($_[1]*100/$progress_size)),"<br>\n";
6603 $last_progress_time = $time_now;
6605 $progress_step = $st;
6608 # No total size .. so only show in 100k jumps
6609 if ($_[1] > $last_progress_size+100*1024) {
6610 print $sp,&text('progress_data2n',
6611 &nice_size($_[1])),"<br>\n";
6612 $last_progress_size = $_[1];
6616 elsif ($_[0] == 4) {
6617 # All done downloading
6618 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6620 elsif ($_[0] == 5) {
6621 # Got new location after redirect
6622 $progress_callback_url = $_[1];
6624 elsif ($_[0] == 6) {
6626 $progress_callback_url = $_[1];
6627 print &text('progress_incache', $progress_callback_url),"<br>\n";
6631 =head2 switch_to_remote_user
6633 Changes the user and group of the current process to that of the unix user
6634 with the same name as the current webmin login, or fails if there is none.
6635 This should be called by Usermin module scripts that only need to run with
6636 limited permissions.
6639 sub switch_to_remote_user
6641 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6643 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6644 &create_missing_homedir(\@remote_user_info);
6646 &switch_to_unix_user(\@remote_user_info);
6647 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6648 $ENV{'HOME'} = $remote_user_info[7];
6650 # Export global variables to caller
6651 if ($main::export_to_caller) {
6652 my ($callpkg) = caller();
6653 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6657 =head2 switch_to_unix_user(&user-details)
6659 Switches the current process to the UID and group ID from the given list
6660 of user details, which must be in the format returned by getpwnam.
6663 sub switch_to_unix_user
6666 if (!defined($uinfo->[0])) {
6667 # No username given, so just use given GID
6668 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6671 # Use all groups from user
6672 ($(, $)) = ( $uinfo->[3],
6673 "$uinfo->[3] ".join(" ", $uinfo->[3],
6674 &other_groups($uinfo->[0])) );
6677 POSIX::setuid($uinfo->[2]);
6679 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6680 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6684 =head2 eval_as_unix_user(username, &code)
6686 Runs some code fragment with the effective UID and GID switch to that
6687 of the given Unix user, so that file IO takes place with his permissions.
6691 sub eval_as_unix_user
6693 my ($user, $code) = @_;
6694 my @uinfo = getpwnam($user);
6695 if (!scalar(@uinfo)) {
6696 &error("eval_as_unix_user called with invalid user $user");
6698 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6702 local $main::error_must_die = 1;
6709 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6712 return wantarray ? @rv : $rv[0];
6715 =head2 create_user_config_dirs
6717 Creates per-user config directories and sets $user_config_directory and
6718 $user_module_config_directory to them. Also reads per-user module configs
6719 into %userconfig. This should be called by Usermin module scripts that need
6720 to store per-user preferences or other settings.
6723 sub create_user_config_dirs
6725 return if (!$gconfig{'userconfig'});
6726 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6727 return if (!@uinfo || !$uinfo[7]);
6728 &create_missing_homedir(\@uinfo);
6729 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6730 if (!-d $user_config_directory) {
6731 mkdir($user_config_directory, 0700) ||
6732 &error("Failed to create $user_config_directory : $!");
6733 if ($< == 0 && $uinfo[2]) {
6734 chown($uinfo[2], $uinfo[3], $user_config_directory);
6737 if (&get_module_name()) {
6738 $user_module_config_directory = $user_config_directory."/".
6740 if (!-d $user_module_config_directory) {
6741 mkdir($user_module_config_directory, 0700) ||
6742 &error("Failed to create $user_module_config_directory : $!");
6743 if ($< == 0 && $uinfo[2]) {
6744 chown($uinfo[2], $uinfo[3], $user_config_directory);
6748 &read_file_cached("$module_root_directory/defaultuconfig",
6750 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6751 &read_file_cached("$user_module_config_directory/config",
6755 # Export global variables to caller
6756 if ($main::export_to_caller) {
6757 my ($callpkg) = caller();
6758 foreach my $v ('$user_config_directory',
6759 '$user_module_config_directory', '%userconfig') {
6760 my ($vt, $vn) = split('', $v, 2);
6761 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6766 =head2 create_missing_homedir(&uinfo)
6768 If auto homedir creation is enabled, create one for this user if needed.
6769 For internal use only.
6772 sub create_missing_homedir
6775 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6776 # Use has no home dir .. make one
6777 system("mkdir -p ".quotemeta($uinfo->[7]));
6778 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6779 if ($gconfig{'create_homedir_perms'} ne '') {
6780 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6785 =head2 filter_javascript(text)
6787 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6788 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6791 sub filter_javascript
6794 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6795 $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;
6796 $rv =~ s/(javascript:)/x$1/gi;
6797 $rv =~ s/(vbscript:)/x$1/gi;
6801 =head2 resolve_links(path)
6803 Given a path that may contain symbolic links, returns the real path.
6809 $path =~ s/\/+/\//g;
6810 $path =~ s/\/$// if ($path ne "/");
6811 my @p = split(/\/+/, $path);
6813 for(my $i=0; $i<@p; $i++) {
6814 my $sofar = "/".join("/", @p[0..$i]);
6815 my $lnk = readlink($sofar);
6816 if ($lnk eq $sofar) {
6817 # Link to itself! Cannot do anything more really ..
6820 elsif ($lnk =~ /^\//) {
6821 # Link is absolute..
6822 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6826 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6832 =head2 simplify_path(path, bogus)
6834 Given a path, maybe containing elements ".." and "." , convert it to a
6835 clean, absolute form. Returns undef if this is not possible.
6843 my @bits = split(/\/+/, $dir);
6846 foreach my $b (@bits) {
6850 elsif ($b eq "..") {
6852 if (scalar(@fixedbits) == 0) {
6853 # Cannot! Already at root!
6860 push(@fixedbits, $b);
6863 return "/".join('/', @fixedbits);
6866 =head2 same_file(file1, file2)
6868 Returns 1 if two files are actually the same
6873 return 1 if ($_[0] eq $_[1]);
6874 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6875 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6876 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6877 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6878 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6879 return 0 if (!@stat1 || !@stat2);
6880 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6883 =head2 flush_webmin_caches
6885 Clears all in-memory and on-disk caches used by Webmin.
6888 sub flush_webmin_caches
6890 undef(%main::read_file_cache);
6891 undef(%main::acl_hash_cache);
6892 undef(%main::acl_array_cache);
6893 undef(%main::has_command_cache);
6894 undef(@main::list_languages_cache);
6895 undef($main::got_list_usermods_cache);
6896 undef(@main::list_usermods_cache);
6897 undef(%main::foreign_installed_cache);
6898 unlink("$config_directory/module.infos.cache");
6899 &get_all_module_infos();
6902 =head2 list_usermods
6904 Returns a list of additional module restrictions. For internal use in
6910 if (!$main::got_list_usermods_cache) {
6911 @main::list_usermods_cache = ( );
6913 open(USERMODS, "$config_directory/usermin.mods");
6915 if (/^([^:]+):(\+|-|):(.*)/) {
6916 push(@main::list_usermods_cache,
6917 [ $1, $2, [ split(/\s+/, $3) ] ]);
6921 $main::got_list_usermods_cache = 1;
6923 return @main::list_usermods_cache;
6926 =head2 available_usermods(&allmods, &usermods)
6928 Returns a list of modules that are available to the given user, based
6929 on usermod additional/subtractions. For internal use by Usermin only.
6932 sub available_usermods
6934 return @{$_[0]} if (!@{$_[1]});
6936 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6937 my @uinfo = @remote_user_info;
6938 @uinfo = getpwnam($remote_user) if (!@uinfo);
6939 foreach my $u (@{$_[1]}) {
6941 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6944 elsif ($u->[0] =~ /^\@(.*)$/) {
6945 # Check for group membership
6946 my @ginfo = getgrnam($1);
6947 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6948 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6950 elsif ($u->[0] =~ /^\//) {
6951 # Check users and groups in file
6953 open(USERFILE, $u->[0]);
6956 if ($_ eq $remote_user) {
6959 elsif (/^\@(.*)$/) {
6960 my @ginfo = getgrnam($1);
6962 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6963 &indexof($remote_user,
6964 split(/\s+/, $ginfo[3])) >= 0));
6971 if ($u->[1] eq "+") {
6972 map { $mods{$_}++ } @{$u->[2]};
6974 elsif ($u->[1] eq "-") {
6975 map { delete($mods{$_}) } @{$u->[2]};
6979 map { $mods{$_}++ } @{$u->[2]};
6983 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6986 =head2 get_available_module_infos(nocache)
6988 Returns a list of modules available to the current user, based on
6989 operating system support, access control and usermod restrictions. Useful
6990 in themes that need to display a list of modules the user can use.
6991 Each element of the returned array is a hash reference in the same format as
6992 returned by get_module_info.
6995 sub get_available_module_infos
6998 &read_acl(\%acl, \%uacl);
6999 my $risk = $gconfig{'risk_'.$base_remote_user};
7001 foreach my $minfo (&get_all_module_infos($_[0])) {
7002 next if (!&check_os_support($minfo));
7004 # Check module risk level
7005 next if ($risk ne 'high' && $minfo->{'risk'} &&
7006 $minfo->{'risk'} !~ /$risk/);
7010 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7011 !$acl{$base_remote_user,"*"});
7013 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7017 # Check usermod restrictions
7018 my @usermods = &list_usermods();
7019 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7020 &available_usermods(\@rv, \@usermods);
7022 # Check RBAC restrictions
7024 foreach my $m (@rv) {
7025 if (&supports_rbac($m->{'dir'}) &&
7026 &use_rbac_module_acl(undef, $m->{'dir'})) {
7027 local $rbacs = &get_rbac_module_acl($remote_user,
7035 # Module or system doesn't support RBAC
7036 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7042 if (defined(&theme_foreign_available)) {
7043 foreach my $m (@rbacrv) {
7044 if (&theme_foreign_available($m->{'dir'})) {
7053 # Check licence module vetos
7055 if ($main::licence_module) {
7056 foreach my $m (@themerv) {
7057 if (&foreign_call($main::licence_module,
7058 "check_module_licence", $m->{'dir'})) {
7070 =head2 get_visible_module_infos(nocache)
7072 Like get_available_module_infos, but excludes hidden modules from the list.
7073 Each element of the returned array is a hash reference in the same format as
7074 returned by get_module_info.
7077 sub get_visible_module_infos
7080 my $pn = &get_product_name();
7081 return grep { !$_->{'hidden'} &&
7082 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7085 =head2 get_visible_modules_categories(nocache)
7087 Returns a list of Webmin module categories, each of which is a hash ref
7088 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7089 of modules in the category, in the format returned by get_module_info.
7090 Un-used modules are automatically assigned to the 'unused' category, and
7091 those with no category are put into 'others'.
7094 sub get_visible_modules_categories
7097 my @mods = &get_visible_module_infos($nocache);
7099 if (&get_product_name() eq 'webmin') {
7100 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7101 @mods = grep { $_->{'installed'} ne '0' } @mods;
7103 my %cats = &list_categories(\@mods);
7105 foreach my $c (keys %cats) {
7106 my $cat = { 'code' => $c || 'other',
7107 'desc' => $cats{$c} };
7108 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7111 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7112 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7114 # Add un-installed modules in magic category
7115 my $cat = { 'code' => 'unused',
7116 'desc' => $text{'main_unused'},
7118 'modules' => \@unmods };
7124 =head2 is_under_directory(directory, file)
7126 Returns 1 if the given file is under the specified directory, 0 if not.
7127 Symlinks are taken into account in the file to find it's 'real' location.
7130 sub is_under_directory
7132 my ($dir, $file) = @_;
7133 return 1 if ($dir eq "/");
7134 return 0 if ($file =~ /\.\./);
7135 my $ld = &resolve_links($dir);
7137 return &is_under_directory($ld, $file);
7139 my $lp = &resolve_links($file);
7141 return &is_under_directory($dir, $lp);
7143 return 0 if (length($file) < length($dir));
7144 return 1 if ($dir eq $file);
7146 return substr($file, 0, length($dir)) eq $dir;
7149 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7151 Given an absolute URL, returns the host, port, page and ssl flag components.
7152 Relative URLs can also be parsed, if the base information is provided.
7157 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7159 my $ssl = $1 eq 'https';
7160 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
7166 elsif ($_[0] =~ /^\/\S*$/) {
7167 # A relative to the server URL
7168 return ($_[1], $_[2], $_[0], $_[4]);
7171 # A relative to the directory URL
7173 $page =~ s/[^\/]+$//;
7174 return ($_[1], $_[2], $page.$_[0], $_[4]);
7178 =head2 check_clicks_function
7180 Returns HTML for a JavaScript function called check_clicks that returns
7181 true when first called, but false subsequently. Useful on onClick for
7182 critical buttons. Deprecated, as this method of preventing duplicate actions
7186 sub check_clicks_function
7191 function check_clicks(form)
7198 for(i=0; i<form.length; i++)
7199 form.elements[i].disabled = true;
7208 =head2 load_entities_map
7210 Returns a hash ref containing mappings between HTML entities (like ouml) and
7211 ascii values (like 246). Mainly for internal use.
7214 sub load_entities_map
7216 if (!%entities_map_cache) {
7218 open(EMAP, "$root_directory/entities_map.txt");
7220 if (/^(\d+)\s+(\S+)/) {
7221 $entities_map_cache{$2} = $1;
7226 return \%entities_map_cache;
7229 =head2 entities_to_ascii(string)
7231 Given a string containing HTML entities like ö and 7, replace them
7232 with their ASCII equivalents.
7235 sub entities_to_ascii
7238 my $emap = &load_entities_map();
7239 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7240 $str =~ s/&#(\d+);/chr($1)/ge;
7244 =head2 get_product_name
7246 Returns either 'webmin' or 'usermin', depending on which program the current
7247 module is in. Useful for modules that can be installed into either.
7250 sub get_product_name
7252 return $gconfig{'product'} if (defined($gconfig{'product'}));
7253 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7258 Returns the character set for the current language, such as iso-8859-1.
7263 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7264 $current_lang_info->{'charset'} ?
7265 $current_lang_info->{'charset'} : $default_charset;
7269 =head2 get_display_hostname
7271 Returns the system's hostname for UI display purposes. This may be different
7272 from the actual hostname if you administrator has configured it so in the
7273 Webmin Configuration module.
7276 sub get_display_hostname
7278 if ($gconfig{'hostnamemode'} == 0) {
7279 return &get_system_hostname();
7281 elsif ($gconfig{'hostnamemode'} == 3) {
7282 return $gconfig{'hostnamedisplay'};
7285 my $h = $ENV{'HTTP_HOST'};
7287 if ($gconfig{'hostnamemode'} == 2) {
7288 $h =~ s/^(www|ftp|mail)\.//i;
7294 =head2 save_module_config([&config], [modulename])
7296 Saves the configuration for some module. The config parameter is an optional
7297 hash reference of names and values to save, which defaults to the global
7298 %config hash. The modulename parameter is the module to update the config
7299 file, which defaults to the current module.
7302 sub save_module_config
7304 my $c = $_[0] || { &get_module_variable('%config') };
7305 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7306 &write_file("$config_directory/$m/config", $c);
7309 =head2 save_user_module_config([&config], [modulename])
7311 Saves the user's Usermin preferences for some module. The config parameter is
7312 an optional hash reference of names and values to save, which defaults to the
7313 global %userconfig hash. The modulename parameter is the module to update the
7314 config file, which defaults to the current module.
7317 sub save_user_module_config
7319 my $c = $_[0] || { &get_module_variable('%userconfig') };
7320 my $m = $_[1] || &get_module_name();
7321 my $ucd = $user_config_directory;
7323 my @uinfo = @remote_user_info ? @remote_user_info
7324 : getpwnam($remote_user);
7325 return if (!@uinfo || !$uinfo[7]);
7326 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7328 &write_file("$ucd/$m/config", $c);
7331 =head2 nice_size(bytes, [min])
7333 Converts a number of bytes into a number followed by a suffix like GB, MB
7334 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7335 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7340 my ($units, $uname);
7341 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7342 $units = 1024*1024*1024*1024;
7345 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7346 $units = 1024*1024*1024;
7349 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7353 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7361 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7363 return $sz." ".$uname;
7366 =head2 get_perl_path
7368 Returns the path to Perl currently in use, such as /usr/bin/perl.
7373 if (open(PERL, "$config_directory/perl-path")) {
7379 return $^X if (-x $^X);
7380 return &has_command("perl");
7383 =head2 get_goto_module([&mods])
7385 Returns the details of a module that the current user should be re-directed
7386 to after logging in, or undef if none. Useful for themes.
7391 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7392 if ($gconfig{'gotomodule'}) {
7393 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7394 return $goto if ($goto);
7396 if (@mods == 1 && $gconfig{'gotoone'}) {
7402 =head2 select_all_link(field, form, [text])
7404 Returns HTML for a 'Select all' link that uses Javascript to select
7405 multiple checkboxes with the same name. The parameters are :
7407 =item field - Name of the checkbox inputs.
7409 =item form - Index of the form on the page.
7411 =item text - Message for the link, defaulting to 'Select all'.
7416 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7417 my ($field, $form, $text) = @_;
7419 $text ||= $text{'ui_selall'};
7420 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7423 =head2 select_invert_link(field, form, text)
7425 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7426 selection on multiple checkboxes with the same name. The parameters are :
7428 =item field - Name of the checkbox inputs.
7430 =item form - Index of the form on the page.
7432 =item text - Message for the link, defaulting to 'Invert selection'.
7435 sub select_invert_link
7437 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7438 my ($field, $form, $text) = @_;
7440 $text ||= $text{'ui_selinv'};
7441 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7444 =head2 select_rows_link(field, form, text, &rows)
7446 Returns HTML for a link that uses Javascript to select rows with particular
7447 values for their checkboxes. The parameters are :
7449 =item field - Name of the checkbox inputs.
7451 =item form - Index of the form on the page.
7453 =item text - Message for the link, de
7455 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7458 sub select_rows_link
7460 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7461 my ($field, $form, $text, $rows) = @_;
7463 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7464 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7465 $js .= "return false;";
7466 return "<a href='#' onClick='$js'>$text</a>";
7469 =head2 check_pid_file(file)
7471 Given a pid file, returns the PID it contains if the process is running.
7476 open(PIDFILE, $_[0]) || return undef;
7477 my $pid = <PIDFILE>;
7479 $pid =~ /^\s*(\d+)/ || return undef;
7480 kill(0, $1) || return undef;
7486 Return the local os-specific library name to this module. For internal use only.
7491 my $mn = &get_module_name();
7492 my $md = &module_root_directory($mn);
7493 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7494 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7496 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7497 return "$mn-$gconfig{'os_type'}-lib.pl";
7499 elsif (-r "$md/$mn-generic-lib.pl") {
7500 return "$mn-generic-lib.pl";
7507 =head2 module_root_directory(module)
7509 Given a module name, returns its root directory. On a typical Webmin install,
7510 all modules are under the same directory - but it is theoretically possible to
7514 sub module_root_directory
7516 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7517 if (@root_directories > 1) {
7518 foreach my $r (@root_directories) {
7524 return "$root_directories[0]/$d";
7527 =head2 list_mime_types
7529 Returns a list of all known MIME types and their extensions, as a list of hash
7530 references with keys :
7532 =item type - The MIME type, like text/plain.
7534 =item exts - A list of extensions, like .doc and .avi.
7536 =item desc - A human-readable description for the MIME type.
7541 if (!@list_mime_types_cache) {
7543 open(MIME, "$root_directory/mime.types");
7547 if (s/#\s*(.*)$//g) {
7550 my ($type, @exts) = split(/\s+/);
7552 push(@list_mime_types_cache, { 'type' => $type,
7559 return @list_mime_types_cache;
7562 =head2 guess_mime_type(filename, [default])
7564 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7565 The optional default parameter sets a default type of use if none is found,
7566 which defaults to application/octet-stream.
7571 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7573 foreach my $t (&list_mime_types()) {
7574 foreach my $e (@{$t->{'exts'}}) {
7575 return $t->{'type'} if (lc($e) eq lc($ext));
7579 return @_ > 1 ? $_[1] : "application/octet-stream";
7582 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7584 Opens a file handle for writing to a temporary file, which will only be
7585 renamed over the real file when the handle is closed. This allows critical
7586 files like /etc/shadow to be updated safely, even if writing fails part way
7587 through due to lack of disk space. The parameters are :
7589 =item handle - File handle to open, as you would use in Perl's open function.
7591 =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.
7593 =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 $! with the error code.
7595 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7597 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7603 # Just getting a temp file
7604 if (!defined($main::open_tempfiles{$_[0]})) {
7605 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7606 my $dir = $1 || "/";
7607 my $tmp = "$dir/$2.webmintmp.$$";
7608 $main::open_tempfiles{$_[0]} = $tmp;
7609 push(@main::temporary_files, $tmp);
7611 return $main::open_tempfiles{$_[0]};
7615 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7616 $fh = &callers_package($fh);
7618 my %gaccess = &get_module_acl(undef, "");
7619 my $db = $gconfig{'debug_what_write'};
7620 if ($file =~ /\r|\n|\0/) {
7621 if ($noerror) { return 0; }
7622 else { &error("Filename contains invalid characters"); }
7624 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7625 # Read-only mode .. veto all writes
7626 print STDERR "vetoing write to $file\n";
7627 return open($fh, ">$null_file");
7629 elsif ($file =~ /^(>|>>|)nul$/i) {
7630 # Write to Windows null device
7631 &webmin_debug_log($1 eq ">" ? "WRITE" :
7632 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7634 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7635 # Writes to /dev/null or TTYs don't need to be handled
7636 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7637 return open($fh, $file);
7639 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7640 &webmin_debug_log("WRITE", $1) if ($db);
7641 # Over-writing a file, via a temp file
7643 $file = &translate_filename($file);
7645 # Open the link target instead
7646 $file = &resolve_links($file);
7649 # Cannot open a directory!
7650 if ($noerror) { return 0; }
7651 else { &error("Cannot write to directory $file"); }
7653 my $tmp = &open_tempfile($file);
7654 my $ex = open($fh, ">$tmp");
7655 if (!$ex && $! =~ /permission/i) {
7656 # Could not open temp file .. try opening actual file
7658 $ex = open($fh, ">$file");
7659 delete($main::open_tempfiles{$file});
7662 $main::open_temphandles{$fh} = $file;
7665 if (!$ex && !$noerror) {
7666 &error(&text("efileopen", $file, $!));
7670 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7671 # Just writing direct to a file
7672 &webmin_debug_log("WRITE", $1) if ($db);
7674 $file = &translate_filename($file);
7675 my @old_attributes = &get_clear_file_attributes($file);
7676 my $ex = open($fh, ">$file");
7677 &reset_file_attributes($file, \@old_attributes);
7678 $main::open_temphandles{$fh} = $file;
7679 if (!$ex && !$noerror) {
7680 &error(&text("efileopen", $file, $!));
7685 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7686 # Appending to a file .. nothing special to do
7687 &webmin_debug_log("APPEND", $1) if ($db);
7689 $file = &translate_filename($file);
7690 my @old_attributes = &get_clear_file_attributes($file);
7691 my $ex = open($fh, ">>$file");
7692 &reset_file_attributes($file, \@old_attributes);
7693 $main::open_temphandles{$fh} = $file;
7694 if (!$ex && !$noerror) {
7695 &error(&text("efileopen", $file, $!));
7700 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7701 # Read mode .. nothing to do here
7702 &webmin_debug_log("READ", $file) if ($db);
7703 $file = &translate_filename($file);
7704 return open($fh, $file);
7706 elsif ($file eq ">" || $file eq ">>") {
7707 my ($package, $filename, $line) = caller;
7708 if ($noerror) { return 0; }
7709 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7712 my ($package, $filename, $line) = caller;
7713 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7718 =head2 close_tempfile(file|handle)
7720 Copies a temp file to the actual file, assuming that all writes were
7721 successful. The handle must have been one passed to open_tempfile.
7727 my $fh = &callers_package($_[0]);
7729 if (defined($file = $main::open_temphandles{$fh})) {
7731 close($fh) || &error(&text("efileclose", $file, $!));
7732 delete($main::open_temphandles{$fh});
7733 return &close_tempfile($file);
7735 elsif (defined($main::open_tempfiles{$_[0]})) {
7737 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7738 my @st = stat($_[0]);
7739 if (&is_selinux_enabled() && &has_command("chcon")) {
7740 # Set original security context
7741 system("chcon --reference=".quotemeta($_[0]).
7742 " ".quotemeta($main::open_tempfiles{$_[0]}).
7743 " >/dev/null 2>&1");
7745 my @old_attributes = &get_clear_file_attributes($_[0]);
7746 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7748 # Set original permissions and ownership
7749 chmod($st[2], $_[0]);
7750 chown($st[4], $st[5], $_[0]);
7752 &reset_file_attributes($_[0], \@old_attributes);
7753 delete($main::open_tempfiles{$_[0]});
7754 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7755 if ($main::open_templocks{$_[0]}) {
7756 &unlock_file($_[0]);
7757 delete($main::open_templocks{$_[0]});
7762 # Must be closing a handle not associated with a file
7768 =head2 print_tempfile(handle, text, ...)
7770 Like the normal print function, but calls &error on failure. Useful when
7771 combined with open_tempfile, to ensure that a criticial file is never
7772 only partially written.
7777 my ($fh, @args) = @_;
7778 $fh = &callers_package($fh);
7779 (print $fh @args) || &error(&text("efilewrite",
7780 $main::open_temphandles{$fh} || $fh, $!));
7783 =head2 is_selinux_enabled
7785 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7788 sub is_selinux_enabled
7790 if (!defined($main::selinux_enabled_cache)) {
7792 if ($gconfig{'os_type'} !~ /-linux$/) {
7793 # Not on linux, so no way
7794 $main::selinux_enabled_cache = 0;
7796 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7797 # Use global config file
7798 $main::selinux_enabled_cache =
7799 $seconfig{'SELINUX'} eq 'disabled' ||
7800 !$seconfig{'SELINUX'} ? 0 : 1;
7803 # Use selinuxenabled command
7804 #$selinux_enabled_cache =
7805 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7806 $main::selinux_enabled_cache = 0;
7809 return $main::selinux_enabled_cache;
7812 =head2 get_clear_file_attributes(file)
7814 Finds file attributes that may prevent writing, clears them and returns them
7815 as a list. May call error. Mainly for internal use by open_tempfile and
7819 sub get_clear_file_attributes
7823 if ($gconfig{'chattr'}) {
7824 # Get original immutable bit
7825 my $out = &backquote_command(
7826 "lsattr ".quotemeta($file)." 2>/dev/null");
7828 $out =~ s/\s\S+\n//;
7829 @old_attributes = grep { $_ ne '-' } split(//, $out);
7831 if (&indexof("i", @old_attributes) >= 0) {
7832 my $err = &backquote_logged(
7833 "chattr -i ".quotemeta($file)." 2>&1");
7835 &error("Failed to remove immutable bit on ".
7840 return @old_attributes;
7843 =head2 reset_file_attributes(file, &attributes)
7845 Put back cleared attributes on some file. May call error. Mainly for internal
7846 use by close_tempfile.
7849 sub reset_file_attributes
7851 my ($file, $old_attributes) = @_;
7852 if (&indexof("i", @$old_attributes) >= 0) {
7853 my $err = &backquote_logged(
7854 "chattr +i ".quotemeta($file)." 2>&1");
7856 &error("Failed to restore immutable bit on ".
7862 =head2 cleanup_tempnames
7864 Remove all temporary files generated using transname. Typically only called
7865 internally when a Webmin script exits.
7868 sub cleanup_tempnames
7870 foreach my $t (@main::temporary_files) {
7873 @main::temporary_files = ( );
7876 =head2 open_lock_tempfile([handle], file, [no-error])
7878 Returns a temporary file for writing to some actual file, and also locks it.
7879 Effectively the same as calling lock_file and open_tempfile on the same file,
7880 but calls the unlock for you automatically when it is closed.
7883 sub open_lock_tempfile
7885 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7886 $fh = &callers_package($fh);
7887 my $lockfile = $file;
7888 $lockfile =~ s/^[^\/]*//;
7889 if ($lockfile =~ /^\//) {
7890 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7892 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7897 $main::end_exit_status ||= $?;
7898 if ($$ == $main::initial_process_id) {
7899 # Exiting from initial process
7900 &cleanup_tempnames();
7901 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7902 $main::debug_log_start_module eq &get_module_name()) {
7903 my $len = time() - $main::debug_log_start_time;
7904 &webmin_debug_log("STOP", "runtime=$len");
7905 $main::debug_log_start_time = 0;
7907 if (!$ENV{'SCRIPT_NAME'} &&
7908 $main::initial_module_name eq &get_module_name()) {
7909 # In a command-line script - call the real exit, so that the
7910 # exit status gets properly propogated. In some cases this
7911 # was not happening.
7912 exit($main::end_exit_status);
7917 =head2 month_to_number(month)
7919 Converts a month name like feb to a number like 1.
7924 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7927 =head2 number_to_month(number)
7929 Converts a number like 1 to a month name like Feb.
7934 return ucfirst($number_to_month_map{$_[0]});
7937 =head2 get_rbac_module_acl(user, module)
7939 Returns a hash reference of RBAC overrides ACLs for some user and module.
7940 May return undef if none exist (indicating access denied), or the string *
7941 if full access is granted.
7944 sub get_rbac_module_acl
7946 my ($user, $mod) = @_;
7947 eval "use Authen::SolarisRBAC";
7948 return undef if ($@);
7951 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7952 # Automagic webmin.modulename.admin authorization exists .. allow access
7954 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7955 %rv = ( 'noconfig' => 1 );
7962 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7966 my ($auths, $acls) = split(/\s+/, $_);
7967 my @auths = split(/,/, $auths);
7969 my ($merge) = ($acls =~ s/^\+//);
7971 if ($auths eq "*") {
7972 # These ACLs apply to all RBAC users.
7973 # Only if there is some that match a specific authorization
7974 # later will they be used though.
7977 # Check each of the RBAC authorizations
7978 foreach my $a (@auths) {
7979 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7984 $foundany++ if ($gotall);
7987 # Found an RBAC authorization - return the ACLs
7988 return "*" if ($acls eq "*");
7989 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7991 # Just add to current set
7992 foreach my $a (keys %acl) {
8003 return !$foundany ? undef : %rv ? \%rv : undef;
8006 =head2 supports_rbac([module])
8008 Returns 1 if RBAC client support is available, such as on Solaris.
8013 return 0 if ($gconfig{'os_type'} ne 'solaris');
8014 eval "use Authen::SolarisRBAC";
8017 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8022 =head2 use_rbac_module_acl(user, module)
8024 Returns 1 if some user should use RBAC to get permissions for a module
8027 sub use_rbac_module_acl
8029 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8030 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8031 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8032 my %access = &get_module_acl($u, $m, 1);
8033 return $access{'rbac'} ? 1 : 0;
8036 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8038 Runs some command, possibly feeding it input and capturing output to the
8039 give files or scalar references. The parameters are :
8041 =item command - Full command to run, possibly including shell meta-characters.
8043 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8045 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8047 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8049 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8051 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8056 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8057 if (&is_readonly_mode() && !$safe) {
8058 print STDERR "Vetoing command $_[0]\n";
8062 $cmd = &translate_command($cmd);
8064 # Use ` operator where possible
8065 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8066 if (!$stdin && ref($stdout) && !$stderr) {
8067 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8068 $$stdout = `$cmd 2>$null_file`;
8071 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8072 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8073 $$stdout = `$cmd 2>&1`;
8076 elsif (!$stdin && !$stdout && !$stderr) {
8077 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8078 return system("$cmd >$null_file 2>$null_file <$null_file");
8082 $| = 1; # needed on some systems to flush before forking
8083 pipe(EXECSTDINr, EXECSTDINw);
8084 pipe(EXECSTDOUTr, EXECSTDOUTw);
8085 pipe(EXECSTDERRr, EXECSTDERRw);
8087 if (!($pid = fork())) {
8091 open(STDIN, "<&EXECSTDINr");
8092 open(STDOUT, ">&EXECSTDOUTw");
8093 if (ref($stderr) && $stderr eq $stdout) {
8094 open(STDERR, ">&EXECSTDOUTw");
8097 open(STDERR, ">&EXECSTDERRw");
8104 my $fullcmd = "($cmd)";
8105 if ($stdin && !ref($stdin)) {
8106 $fullcmd .= " <$stdin";
8108 if ($stdout && !ref($stdout)) {
8109 $fullcmd .= " >$stdout";
8111 if ($stderr && !ref($stderr)) {
8112 if ($stderr eq $stdout) {
8113 $fullcmd .= " 2>&1";
8116 $fullcmd .= " 2>$stderr";
8119 if ($gconfig{'os_type'} eq 'windows') {
8123 exec("/bin/sh", "-c", $fullcmd);
8125 print "Exec failed : $!\n";
8132 # Feed input and capture output
8134 if ($stdin && ref($stdin)) {
8135 print EXECSTDINw $$stdin;
8138 if ($stdout && ref($stdout)) {
8140 while(<EXECSTDOUTr>) {
8145 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8147 while(<EXECSTDERRr>) {
8158 =head2 open_readfile(handle, file)
8160 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8161 exactly the same as Perl's open function.
8166 my ($fh, $file) = @_;
8167 $fh = &callers_package($fh);
8168 my $realfile = &translate_filename($file);
8169 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8170 return open($fh, "<".$realfile);
8173 =head2 open_execute_command(handle, command, output?, safe?)
8175 Runs some command, with the specified file handle set to either write to it if
8176 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8177 indicates if the command modifies the state of the system or not.
8180 sub open_execute_command
8182 my ($fh, $cmd, $mode, $safe) = @_;
8183 $fh = &callers_package($fh);
8184 my $realcmd = &translate_command($cmd);
8185 if (&is_readonly_mode() && !$safe) {
8186 # Don't actually run it
8187 print STDERR "vetoing command $cmd\n";
8190 return open($fh, ">$null_file");
8193 return open($fh, $null_file);
8197 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8198 if ($gconfig{'debug_what_cmd'});
8200 return open($fh, "| $cmd");
8202 elsif ($mode == 1) {
8203 return open($fh, "$cmd 2>$null_file |");
8205 elsif ($mode == 2) {
8206 return open($fh, "$cmd 2>&1 |");
8210 =head2 translate_filename(filename)
8212 Applies all relevant registered translation functions to a filename. Mostly
8213 for internal use, and typically does nothing.
8216 sub translate_filename
8218 my ($realfile) = @_;
8219 my @funcs = grep { $_->[0] eq &get_module_name() ||
8220 !defined($_->[0]) } @main::filename_callbacks;
8221 foreach my $f (@funcs) {
8223 $realfile = &$func($realfile, @{$f->[2]});
8228 =head2 translate_command(filename)
8230 Applies all relevant registered translation functions to a command. Mostly
8231 for internal use, and typically does nothing.
8234 sub translate_command
8237 my @funcs = grep { $_->[0] eq &get_module_name() ||
8238 !defined($_->[0]) } @main::command_callbacks;
8239 foreach my $f (@funcs) {
8241 $realcmd = &$func($realcmd, @{$f->[2]});
8246 =head2 register_filename_callback(module|undef, &function, &args)
8248 Registers some function to be called when the specified module (or all
8249 modules) tries to open a file for reading and writing. The function must
8250 return the actual file to open. This allows you to override which files
8251 other code actually operates on, via the translate_filename function.
8254 sub register_filename_callback
8256 my ($mod, $func, $args) = @_;
8257 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8260 =head2 register_command_callback(module|undef, &function, &args)
8262 Registers some function to be called when the specified module (or all
8263 modules) tries to execute a command. The function must return the actual
8264 command to run. This allows you to override which commands other other code
8265 actually runs, via the translate_command function.
8268 sub register_command_callback
8270 my ($mod, $func, $args) = @_;
8271 push(@main::command_callbacks, [ $mod, $func, $args ]);
8274 =head2 capture_function_output(&function, arg, ...)
8276 Captures output that some function prints to STDOUT, and returns it. Useful
8277 for functions outside your control that print data when you really want to
8278 manipulate it before output.
8281 sub capture_function_output
8283 my ($func, @args) = @_;
8284 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8285 my $old = select(SOCKET1);
8286 my @rv = &$func(@args);
8295 return wantarray ? ($out, \@rv) : $out;
8298 =head2 capture_function_output_tempfile(&function, arg, ...)
8300 Behaves the same as capture_function_output, but uses a temporary file
8301 to avoid buffer full problems.
8304 sub capture_function_output_tempfile
8306 my ($func, @args) = @_;
8307 my $temp = &transname();
8308 open(BUFFER, ">$temp");
8309 my $old = select(BUFFER);
8310 my @rv = &$func(@args);
8313 my $out = &read_file_contents($temp);
8314 &unlink_file($temp);
8315 return wantarray ? ($out, \@rv) : $out;
8318 =head2 modules_chooser_button(field, multiple, [form])
8320 Returns HTML for a button for selecting one or many Webmin modules.
8321 field - Name of the HTML field to place the module names into.
8322 multiple - Set to 1 if multiple modules can be selected.
8323 form - Index of the form on the page.
8326 sub modules_chooser_button
8328 return &theme_modules_chooser_button(@_)
8329 if (defined(&theme_modules_chooser_button));
8330 my $form = defined($_[2]) ? $_[2] : 0;
8331 my $w = $_[1] ? 700 : 500;
8333 if ($_[1] && $gconfig{'db_sizemodules'}) {
8334 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8336 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8337 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8339 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";
8342 =head2 substitute_template(text, &hash)
8344 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8345 the text replaces it with the value of the hash key foo. Also supports blocks
8346 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8347 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8350 sub substitute_template
8352 # Add some extra fixed parameters to the hash
8353 my %hash = %{$_[1]};
8354 $hash{'hostname'} = &get_system_hostname();
8355 $hash{'webmin_config'} = $config_directory;
8356 $hash{'webmin_etc'} = $config_directory;
8357 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8358 $hash{'webmin_var'} = $var_directory;
8360 # Add time-based parameters, for use in DNS
8361 $hash{'current_time'} = time();
8362 my @tm = localtime($hash{'current_time'});
8363 $hash{'current_year'} = $tm[5]+1900;
8364 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8365 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8366 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8367 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8368 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8370 # Actually do the substition
8372 foreach my $s (keys %hash) {
8373 next if ($s eq ''); # Prevent just $ from being subbed
8376 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8377 $rv =~ s/\$\Q$us\E/$sv/g;
8379 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8380 # and ${IF}..${ENDIF} with value
8381 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8382 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8384 # Replace $IF..$ELSE..$ENDIF block with first value,
8385 # and $IF..$ENDIF with value
8386 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8387 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8389 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8390 # matching, nothing if not
8391 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8392 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8394 # Replace $IFEQ..$ENDIFEQ block with first value if
8395 # matching, nothing if not
8396 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8397 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8400 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8401 # and ${IF}..${ENDIF} with nothing
8402 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8403 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8405 # Replace $IF..$ELSE..$ENDIF block with second value,
8406 # and $IF..$ENDIF with nothing
8407 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8408 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8410 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8411 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8412 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8416 # Now assume any $IF blocks whose variables are not present in the hash
8417 # evaluate to false.
8418 # $IF...$ELSE x $ENDIF => x
8419 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8420 # $IF...x...$ENDIF => (nothing)
8421 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8422 # ${var} => (nothing)
8423 $rv =~ s/\$\{[A-Z]+\}//g;
8428 =head2 running_in_zone
8430 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8431 disable module and features that are not appropriate, like those that modify
8432 mounted filesystems.
8437 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8438 $gconfig{'os_version'} < 10);
8439 my $zn = `zonename 2>$null_file`;
8441 return $zn && $zn ne "global";
8444 =head2 running_in_vserver
8446 Returns 1 if the current Webmin instance is running in a Linux VServer.
8447 Used to disable modules and features that are not appropriate.
8450 sub running_in_vserver
8452 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8455 open(MTAB, "/etc/mtab");
8457 my ($dev, $mp) = split(/\s+/, $_);
8458 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8467 =head2 running_in_xen
8469 Returns 1 if Webmin is running inside a Xen instance, by looking
8470 at /proc/xen/capabilities.
8475 return 0 if (!-r "/proc/xen/capabilities");
8476 my $cap = &read_file_contents("/proc/xen/capabilities");
8477 return $cap =~ /control_d/ ? 0 : 1;
8480 =head2 running_in_openvz
8482 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8483 at /proc/vz/veinfo for a non-zero line.
8486 sub running_in_openvz
8488 return 0 if (!-r "/proc/vz/veinfo");
8489 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8490 return 0 if (!$lref || !@$lref);
8491 foreach my $l (@$lref) {
8493 my @ll = split(/\s+/, $l);
8494 return 0 if ($ll[0] eq '0');
8499 =head2 list_categories(&modules, [include-empty])
8501 Returns a hash mapping category codes to names, including any custom-defined
8502 categories. The modules parameter must be an array ref of module hash objects,
8503 as returned by get_all_module_infos.
8508 my ($mods, $empty) = @_;
8509 my (%cats, %catnames);
8510 &read_file("$config_directory/webmin.catnames", \%catnames);
8511 foreach my $o (@lang_order_list) {
8512 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8517 foreach my $m (@$mods) {
8518 my $c = $m->{'category'};
8519 next if ($cats{$c});
8520 if (defined($catnames{$c})) {
8521 $cats{$c} = $catnames{$c};
8523 elsif ($text{"category_$c"}) {
8524 $cats{$c} = $text{"category_$c"};
8527 # try to get category name from module ..
8528 my %mtext = &load_language($m->{'dir'});
8529 if ($mtext{"category_$c"}) {
8530 $cats{$c} = $mtext{"category_$c"};
8533 $c = $m->{'category'} = "";
8534 $cats{$c} = $text{"category_$c"};
8541 =head2 is_readonly_mode
8543 Returns 1 if the current user is in read-only mode, and thus all writes
8544 to files and command execution should fail.
8547 sub is_readonly_mode
8549 if (!defined($main::readonly_mode_cache)) {
8550 my %gaccess = &get_module_acl(undef, "");
8551 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8553 return $main::readonly_mode_cache;
8556 =head2 command_as_user(user, with-env?, command, ...)
8558 Returns a command to execute some command as the given user, using the
8559 su statement. If on Linux, the /bin/sh shell is forced in case the user
8560 does not have a valid shell. If with-env is set to 1, the -s flag is added
8561 to the su command to read the user's .profile or .bashrc file.
8566 my ($user, $env, @args) = @_;
8567 my @uinfo = getpwnam($user);
8568 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8569 # User shell doesn't appear to be valid
8570 if ($gconfig{'os_type'} =~ /-linux$/) {
8571 # Use -s /bin/sh to force it
8572 $shellarg = " -s /bin/sh";
8574 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8575 $gconfig{'os_type'} eq 'solaris' &&
8576 $gconfig{'os_version'} >= 11 ||
8577 $gconfig{'os_type'} eq 'macos') {
8578 # Use -m and force /bin/sh
8579 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8583 my $rv = "su".($env ? " -" : "").$shellarg.
8584 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8588 =head2 list_osdn_mirrors(project, file)
8590 This function is now deprecated in favor of letting sourceforge just
8591 redirect to the best mirror, and now just returns their primary download URL.
8594 sub list_osdn_mirrors
8596 my ($project, $file) = @_;
8597 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8599 'mirror' => 'downloads' } );
8602 =head2 convert_osdn_url(url)
8604 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8605 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8606 to a real URL on the sourceforge download redirector.
8609 sub convert_osdn_url
8612 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8613 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8614 # Always use the Sourceforge mail download URL, which does
8615 # a location-based redirect for us
8616 my ($project, $file) = ($1, $2);
8617 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8619 return wantarray ? ( $url, 0 ) : $url;
8622 # Some other source .. don't change
8623 return wantarray ? ( $url, 2 ) : $url;
8627 =head2 get_current_dir
8629 Returns the directory the current process is running in.
8635 if ($gconfig{'os_type'} eq 'windows') {
8648 =head2 supports_users
8650 Returns 1 if the current OS supports Unix user concepts and functions like
8651 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8657 return $gconfig{'os_type'} ne 'windows';
8660 =head2 supports_symlinks
8662 Returns 1 if the current OS supports symbolic and hard links. This will not
8663 be the case on Windows.
8666 sub supports_symlinks
8668 return $gconfig{'os_type'} ne 'windows';
8671 =head2 quote_path(path)
8673 Returns a path with safe quoting for the current operating system.
8679 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8680 # Windows only supports "" style quoting
8684 return quotemeta($path);
8688 =head2 get_windows_root
8690 Returns the base windows system directory, like c:/windows.
8693 sub get_windows_root
8695 if ($ENV{'SystemRoot'}) {
8696 my $rv = $ENV{'SystemRoot'};
8701 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8705 =head2 read_file_contents(file)
8707 Given a filename, returns its complete contents as a string. Effectively
8708 the same as the Perl construct `cat file`.
8711 sub read_file_contents
8713 &open_readfile(FILE, $_[0]) || return undef;
8720 =head2 unix_crypt(password, salt)
8722 Performs Unix encryption on a password, using the built-in crypt function or
8723 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8724 must be either an already-hashed password, or a two-character alpha-numeric
8730 my ($pass, $salt) = @_;
8731 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8732 my $rv = eval "crypt(\$pass, \$salt)";
8734 return $rv if ($rv && !$@);
8735 eval "use Crypt::UnixCrypt";
8737 return Crypt::UnixCrypt::crypt($pass, $salt);
8740 &error("Failed to encrypt password : $err");
8744 =head2 split_quoted_string(string)
8746 Given a string like I<foo "bar baz" quux>, returns the array :
8750 sub split_quoted_string
8754 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8755 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8756 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8763 =head2 write_to_http_cache(url, file|&data)
8765 Updates the Webmin cache with the contents of the given file, possibly also
8766 clearing out old data. Mainly for internal use by http_download.
8769 sub write_to_http_cache
8771 my ($url, $file) = @_;
8772 return 0 if (!$gconfig{'cache_size'});
8774 # Don't cache downloads that look dynamic
8775 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8779 # Check if the current module should do caching
8780 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8781 # Caching all except some modules
8782 my @mods = split(/\s+/, $1);
8783 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8785 elsif ($gconfig{'cache_mods'}) {
8786 # Only caching some modules
8787 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8788 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8794 $size = length($$file);
8797 my @st = stat($file);
8801 if ($size > $gconfig{'cache_size'}) {
8802 # Bigger than the whole cache - so don't save it
8807 $cfile = "$main::http_cache_directory/$cfile";
8809 # See how much we have cached currently, clearing old files
8811 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8812 opendir(CACHEDIR, $main::http_cache_directory);
8813 foreach my $f (readdir(CACHEDIR)) {
8814 next if ($f eq "." || $f eq "..");
8815 my $path = "$main::http_cache_directory/$f";
8816 my @st = stat($path);
8817 if ($gconfig{'cache_days'} &&
8818 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8819 # This file is too old .. trash it
8824 push(@cached, [ $path, $st[7], $st[9] ]);
8828 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8829 while($total+$size > $gconfig{'cache_size'} && @cached) {
8830 # Cache is too big .. delete some files until the new one will fit
8831 unlink($cached[0]->[0]);
8832 $total -= $cached[0]->[1];
8836 # Finally, write out the new file
8838 &open_tempfile(CACHEFILE, ">$cfile");
8839 &print_tempfile(CACHEFILE, $$file);
8840 &close_tempfile(CACHEFILE);
8843 my ($ok, $err) = ©_source_dest($file, $cfile);
8849 =head2 check_in_http_cache(url)
8851 If some URL is in the cache and valid, return the filename for it. Mainly
8852 for internal use by http_download.
8855 sub check_in_http_cache
8858 return undef if (!$gconfig{'cache_size'});
8860 # Check if the current module should do caching
8861 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8862 # Caching all except some modules
8863 my @mods = split(/\s+/, $1);
8864 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8866 elsif ($gconfig{'cache_mods'}) {
8867 # Only caching some modules
8868 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8869 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8874 $cfile = "$main::http_cache_directory/$cfile";
8875 my @st = stat($cfile);
8876 return undef if (!@st || !$st[7]);
8877 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8882 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8887 =head2 supports_javascript
8889 Returns 1 if the current browser is assumed to support javascript.
8892 sub supports_javascript
8894 if (defined(&theme_supports_javascript)) {
8895 return &theme_supports_javascript();
8897 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8900 =head2 get_module_name
8902 Returns the name of the Webmin module that called this function. For internal
8903 use only by other API functions.
8908 return &get_module_variable('$module_name');
8911 =head2 get_module_variable(name, [ref])
8913 Returns the value of some variable which is set in the caller's context, if
8914 using the new WebminCore package. For internal use only.
8917 sub get_module_variable
8919 my ($v, $wantref) = @_;
8920 my $slash = $wantref ? "\\" : "";
8921 my $thispkg = &web_libs_package();
8922 if ($thispkg eq 'WebminCore') {
8923 my ($vt, $vn) = split('', $v, 2);
8925 for(my $i=0; ($callpkg) = caller($i); $i++) {
8926 last if ($callpkg ne $thispkg);
8928 return eval "${slash}${vt}${callpkg}::${vn}";
8930 return eval "${slash}${v}";
8933 =head2 clear_time_locale()
8935 Temporarily force the locale to C, until reset_time_locale is called. This is
8936 useful if your code is going to call C<strftime> from the POSIX package, and
8937 you want to ensure that the output is in a consistent format.
8940 sub clear_time_locale
8942 if ($main::clear_time_locale_count == 0) {
8945 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8946 POSIX::setlocale(POSIX::LC_TIME, "C");
8949 $main::clear_time_locale_count++;
8952 =head2 reset_time_locale()
8954 Revert the locale to whatever it was before clear_time_locale was called
8957 sub reset_time_locale
8959 if ($main::clear_time_locale_count == 1) {
8961 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8962 $main::clear_time_locale_old = undef;
8965 $main::clear_time_locale_count--;
8968 =head2 callers_package(filehandle)
8970 Convert a non-module filehandle like FOO to one qualified with the
8971 caller's caller's package, like fsdump::FOO. For internal use only.
8977 my $callpkg = (caller(1))[0];
8978 my $thispkg = &web_libs_package();
8979 if (!ref($fh) && $fh !~ /::/ &&
8980 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8981 $fh = $callpkg."::".$fh;
8986 =head2 web_libs_package()
8988 Returns the package this code is in. We can't always trust __PACKAGE__. For
8992 sub web_libs_package
8994 if ($called_from_webmin_core) {
8995 return "WebminCore";
9000 =head2 get_userdb_string
9002 Returns the URL-style string for connecting to the users and groups database
9005 sub get_userdb_string
9007 return undef if ($main::no_miniserv_userdb);
9009 &get_miniserv_config(\%miniserv);
9010 return $miniserv{'userdb'};
9013 =head2 connect_userdb(string)
9015 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9016 On failure returns an error message string. In an array context, returns the
9023 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9024 if ($proto eq "mysql") {
9025 # Connect to MySQL with DBI
9026 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9027 $drh || return $text{'sql_emysqldriver'};
9028 my ($host, $port) = split(/:/, $host);
9029 my $cstr = "database=$prefix;host=$host";
9030 $cstr .= ";port=$port" if ($port);
9031 my $dbh = $drh->connect($cstr, $user, $pass, { });
9032 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9033 $dbh->{'AutoCommit'} = 1;
9034 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9036 elsif ($proto eq "postgresql") {
9037 # Connect to PostgreSQL with DBI
9038 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9039 $drh || return $text{'sql_epostgresqldriver'};
9040 my ($host, $port) = split(/:/, $host);
9041 my $cstr = "dbname=$prefix;host=$host";
9042 $cstr .= ";port=$port" if ($port);
9043 my $dbh = $drh->connect($cstr, $user, $pass);
9044 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9045 $dbh->{'AutoCommit'} = 1;
9046 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9048 elsif ($proto eq "ldap") {
9049 # Connect with perl LDAP module
9050 eval "use Net::LDAP";
9051 $@ && return $text{'sql_eldapdriver'};
9052 my ($host, $port) = split(/:/, $host);
9053 my $scheme = $args->{'scheme'} || 'ldap';
9055 $port = $scheme eq 'ldaps' ? 636 : 389;
9057 my $ldap = Net::LDAP->new($host,
9059 'scheme' => $scheme);
9060 $ldap || return &text('sql_eldapconnect', $host);
9062 if ($args->{'tls'}) {
9063 # Switch to TLS mode
9064 eval { $mesg = $ldap->start_tls(); };
9065 if ($@ || !$mesg || $mesg->code) {
9066 return &text('sql_eldaptls',
9067 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9070 # Login to the server
9072 $mesg = $ldap->bind(dn => $user, password => $pass);
9075 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9077 if (!$mesg || $mesg->code) {
9078 return &text('sql_eldaplogin', $user,
9079 $mesg ? $mesg->error : "Unknown error");
9081 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9084 return "Unknown protocol $proto";
9088 =head2 disconnect_userdb(string, &handle)
9090 Closes a handle opened by connect_userdb
9093 sub disconnect_userdb
9096 if ($str =~ /^(mysql|postgresql):/) {
9101 elsif ($str =~ /^ldap:/) {
9108 =head2 split_userdb_string(string)
9110 Converts a string like mysql://user:pass@host/db into separate parts
9113 sub split_userdb_string
9116 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9117 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9118 ($1, $2, $3, $4, $5, $7);
9119 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9120 return ($proto, $user, $pass, $host, $prefix, \%args);
9125 $done_web_lib_funcs = 1;