1 =head1 web-lib-funcs.pl
3 Common functions for Webmin CGI scripts. This file gets in-directly included
4 by all scripts that use web-lib.pl.
9 ui_print_header(undef, 'My Module', '');
10 print 'This is Webmin version ',get_webmin_version(),'<p>\n';
19 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
20 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
21 %done_foreign_require $webmin_feedback_address
22 $user_skill_level $pragma_no_cache $foreign_args);
24 use vars qw($module_index_name $number_to_month_map $month_to_number_map
25 $umask_already $default_charset $licence_status $os_type
26 $licence_message $script_name $loaded_theme_oo_library
27 $done_web_lib_funcs $os_version $module_index_link
28 $called_from_webmin_core);
30 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
32 Fill the given hash reference with name=value pairs from a file. The required
35 =item file - The file to head, which must be text with each line like name=value
37 =item hash - The hash reference to add values read from the file to.
39 =item order - If given, an array reference to add names to in the order they were read
41 =item lowercase - If set to 1, names are converted to lower case
43 =item split-char - If set, names and values are split on this character instead of =
49 my $split = defined($_[4]) ? $_[4] : "=";
50 my $realfile = &translate_filename($_[0]);
51 &open_readfile(ARFILE, $_[0]) || return 0;
54 my $hash = index($_, "#");
55 my $eq = index($_, $split);
56 if ($hash != 0 && $eq >= 0) {
57 my $n = substr($_, 0, $eq);
58 my $v = substr($_, $eq+1);
60 $_[1]->{$_[3] ? lc($n) : $n} = $v;
61 push(@{$_[2]}, $n) if ($_[2]);
65 $main::read_file_missing{$realfile} = 0; # It exists now
66 if (defined($main::read_file_cache{$realfile})) {
67 %{$main::read_file_cache{$realfile}} = %{$_[1]};
72 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
74 Like read_file, but reads from an in-memory cache if the file has already been
75 read in this Webmin script. Recommended, as it behaves exactly the same as
76 read_file, but can be much faster.
81 my $realfile = &translate_filename($_[0]);
82 if (defined($main::read_file_cache{$realfile})) {
84 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
87 elsif ($main::read_file_missing{$realfile}) {
88 # Doesn't exist, so don't re-try read
92 # Actually read the file
94 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
95 %{$main::read_file_cache{$realfile}} = %d;
96 %{$_[1]} = ( %{$_[1]}, %d );
100 # Flag as non-existant
101 $main::read_file_missing{$realfile} = 1;
107 =head2 write_file(file, &hash, [join-char])
109 Write out the contents of a hash as name=value lines. The parameters are :
111 =item file - Full path to write to
113 =item hash - A hash reference containing names and values to output
115 =item join-char - If given, names and values are separated by this instead of =
121 my $join = defined($_[2]) ? $_[2] : "=";
122 my $realfile = &translate_filename($_[0]);
123 &read_file($_[0], \%old, \@order);
124 &open_tempfile(ARFILE, ">$_[0]");
125 foreach $k (@order) {
126 if (exists($_[1]->{$k})) {
127 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
128 &error(&text("efilewrite", $realfile, $!));
131 foreach $k (keys %{$_[1]}) {
132 if (!exists($old{$k})) {
133 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
134 &error(&text("efilewrite", $realfile, $!));
137 &close_tempfile(ARFILE);
138 if (defined($main::read_file_cache{$realfile})) {
139 %{$main::read_file_cache{$realfile}} = %{$_[1]};
141 if (defined($main::read_file_missing{$realfile})) {
142 $main::read_file_missing{$realfile} = 0;
146 =head2 html_escape(string)
148 Converts &, < and > codes in text to HTML entities, and returns the new string.
149 This should be used when including data read from other sources in HTML pages.
158 $tmp =~ s/\"/"/g;
159 $tmp =~ s/\'/'/g;
164 =head2 quote_escape(string, [only-quote])
166 Converts ' and " characters in a string into HTML entities, and returns it.
167 Useful for outputing HTML tag values.
172 my ($tmp, $only) = @_;
173 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
174 # convert &, unless it is part of &#nnn; or &foo;
175 $tmp =~ s/&([^#])/&$1/g;
177 $tmp =~ s/&$/&/g;
178 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
179 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
183 =head2 tempname([filename])
185 Returns a mostly random temporary file name, typically under the /tmp/.webmin
186 directory. If filename is given, this will be the base name used. Otherwise
187 a unique name is selected randomly.
192 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
193 $gconfig{'tempdir_'.&get_module_name()} :
194 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
195 $ENV{'TEMP'} ? $ENV{'TEMP'} :
196 $ENV{'TMP'} ? $ENV{'TMP'} :
197 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
198 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
199 "$remote_user_info[7]/.tmp" :
200 @remote_user_info ? $tmp_base."-".$remote_user :
201 $< != 0 ? $tmp_base."-".getpwuid($<) :
203 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
204 # On Windows system, just create temp dir if missing
206 mkdir($tmp_dir, 0755) ||
207 &error("Failed to create temp directory $tmp_dir : $!");
211 # On Unix systems, need to make sure temp dir is valid
213 while($tries++ < 10) {
214 my @st = lstat($tmp_dir);
215 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
217 unlink($tmp_dir) || rmdir($tmp_dir) ||
218 system("/bin/rm -rf ".quotemeta($tmp_dir));
220 mkdir($tmp_dir, 0755) || next;
221 chown($<, $(, $tmp_dir);
222 chmod(0755, $tmp_dir);
225 my @st = lstat($tmp_dir);
226 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
230 if (defined($_[0]) && $_[0] !~ /\.\./) {
231 $rv = "$tmp_dir/$_[0]";
234 $main::tempfilecount++;
236 $rv = $tmp_dir."/".int(rand(1000000))."_".
237 $main::tempfilecount."_".$scriptname;
242 =head2 transname([filename])
244 Behaves exactly like tempname, but records the temp file for deletion when the
245 current Webmin script process exits.
250 my $rv = &tempname(@_);
251 push(@main::temporary_files, $rv);
255 =head2 trunc(string, maxlen)
257 Truncates a string to the shortest whole word less than or equal to the
258 given width. Useful for word wrapping.
263 if (length($_[0]) <= $_[1]) {
266 my $str = substr($_[0],0,$_[1]);
275 =head2 indexof(string, value, ...)
277 Returns the index of some value in an array of values, or -1 if it was not
283 for(my $i=1; $i <= $#_; $i++) {
284 if ($_[$i] eq $_[0]) { return $i - 1; }
289 =head2 indexoflc(string, value, ...)
291 Like indexof, but does a case-insensitive match
296 my $str = lc(shift(@_));
297 my @arr = map { lc($_) } @_;
298 return &indexof($str, @arr);
301 =head2 sysprint(handle, [string]+)
303 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
304 as a replacement for print when writing to pipes or sockets.
309 my $fh = &callers_package($_[0]);
310 my $str = join('', @_[1..$#_]);
311 syswrite $fh, $str, length($str);
314 =head2 check_ipaddress(ip)
316 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
321 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
322 $1 >= 0 && $1 <= 255 &&
323 $2 >= 0 && $2 <= 255 &&
324 $3 >= 0 && $3 <= 255 &&
325 $4 >= 0 && $4 <= 255;
328 =head2 check_ip6address(ip)
330 Check if some IPv6 address is properly formatted, and returns 1 if so.
335 my @blocks = split(/:/, $_[0]);
336 return 0 if (@blocks == 0 || @blocks > 8);
338 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
339 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
340 # value is in [0;128].
342 my $where = index($blocks[$ib],"/");
345 my $b = substr($blocks[$ib],0,$where);
346 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
350 # The netmask must take its value in [0;128]
351 return 0 if ($m <0 || $m >128);
353 # Check the different blocks of the address : 16 bits block in hexa notation.
354 # Possibility of 1 empty block or 2 if the address begins with "::".
357 foreach $b (@blocks) {
358 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
359 $empty++ if ($b eq "");
361 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
367 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
369 Prints HTML for an icon image. The parameters are :
371 =item image - URL for the image, like images/foo.gif
373 =item title - Text to appear under the icon
375 =item link - Optional destination for the icon's link
377 =item href - Other HTML attributes to be added to the <a href> for the link
379 =item width - Optional width of the icon
381 =item height - Optional height of the icon
383 =item before-title - HTML to appear before the title link, but which is not actually in the link
385 =item after-title - HTML to appear after the title link, but which is not actually in the link
390 &load_theme_library();
391 if (defined(&theme_generate_icon)) {
392 &theme_generate_icon(@_);
395 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
396 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
397 if ($tconfig{'noicons'}) {
399 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
402 print "$_[6]$_[1]$_[7]\n";
406 print "<table border><tr><td width=48 height=48>\n",
407 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
408 "$w $h></a></td></tr></table>\n";
409 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
412 print "<table border><tr><td width=48 height=48>\n",
413 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
414 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
420 Converts a string to a form ok for putting in a URL, using % escaping.
426 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
430 =head2 un_urlize(string)
432 Converts a URL-encoded string to it's original contents - the reverse of the
440 $rv =~ s/%(..)/pack("c",hex($1))/ge;
444 =head2 include(filename)
446 Read and output the contents of the given file.
452 open(INCLUDE, &translate_filename($_[0])) || return 0;
460 =head2 copydata(in-handle, out-handle)
462 Read from one file handle and write to another, until there is no more to read.
468 $in = &callers_package($in);
469 $out = &callers_package($out);
471 while(read($in, $buf, 1024) > 0) {
472 (print $out $buf) || return 0;
477 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
479 Read data submitted via a POST request using the multipart/form-data coding,
480 and store it in the global %in hash. The optional parameters are :
482 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
484 =item cbfunc - A function reference to call after reading each block of data.
486 =item cbargs - Additional parameters to the callback function.
491 my ($max, $cbfunc, $cbargs) = @_;
492 my ($boundary, $line, $foo, $name, $got, $file);
493 my $err = &text('readparse_max', $max);
494 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
495 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
498 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
500 <STDIN>; # skip first boundary
503 # Read section headers
507 $got += length($line);
508 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
509 if ($max && $got > $max) {
514 if ($line =~ /^(\S+):\s*(.*)$/) {
515 $header{$lastheader = lc($1)} = $2;
517 elsif ($line =~ /^\s+(.*)$/) {
518 $header{$lastheader} .= $line;
522 # Parse out filename and type
523 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
525 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
530 $foo = $name . "_$1";
537 &error($text{'readparse_cdheader'});
539 if ($header{'content-type'} =~ /^([^\s;]+)/) {
540 $foo = $name . "_content_type";
543 $file = $in{$name."_filename"};
546 $in{$name} .= "\0" if (defined($in{$name}));
549 $got += length($line);
550 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
552 if ($max && $got > $max) {
553 #print STDERR "over limit of $max\n";
558 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
563 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
564 if (index($line, $boundary) != -1) { last; }
567 chop($in{$name}); chop($in{$name});
568 if (index($line,"$boundary--") != -1) { last; }
570 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
573 =head2 ReadParse([&hash], [method], [noplus])
575 Fills the given hash reference with CGI parameters, or uses the global hash
576 %in if none is given. Also sets the global variables $in and @in. The other
579 =item method - For use of this HTTP method, such as GET
581 =item noplus - Don't convert + in parameters to spaces.
586 my $a = $_[0] || \%in;
588 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
590 if ($meth eq 'POST') {
591 my $clen = $ENV{'CONTENT_LENGTH'};
592 &read_fully(STDIN, \$in, $clen) == $clen ||
593 &error("Failed to read POST input : $!");
595 if ($ENV{'QUERY_STRING'}) {
596 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
597 else { $in = $ENV{'QUERY_STRING'}; }
599 @in = split(/\&/, $in);
600 foreach my $i (@in) {
601 my ($k, $v) = split(/=/, $i, 2);
606 $k =~ s/%(..)/pack("c",hex($1))/ge;
607 $v =~ s/%(..)/pack("c",hex($1))/ge;
608 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
612 =head2 read_fully(fh, &buffer, length)
614 Read data from some file handle up to the given length, even in the face
615 of partial reads. Reads the number of bytes read. Stores received data in the
616 string pointed to be the buffer reference.
621 my ($fh, $buf, $len) = @_;
622 $fh = &callers_package($fh);
625 my $r = read(STDIN, $$buf, $len-$got, $got);
632 =head2 read_parse_mime_callback(size, totalsize, upload-id)
634 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
635 the file on every 1% change though. For internal use by the upload progress
639 sub read_parse_mime_callback
641 my ($size, $totalsize, $filename, $id) = @_;
642 return if ($gconfig{'no_upload_tracker'});
645 # Create the upload tracking directory - if running as non-root, this has to
646 # be under the user's home
649 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
650 $vardir = "$uinfo[7]/.tmp";
653 $vardir = $ENV{'WEBMIN_VAR'};
656 &make_dir($vardir, 0755);
659 # Remove any upload.* files more than 1 hour old
660 if (!$main::read_parse_mime_callback_flushed) {
662 opendir(UPDIR, $vardir);
663 foreach my $f (readdir(UPDIR)) {
664 next if ($f !~ /^upload\./);
665 my @st = stat("$vardir/$f");
666 if ($st[9] < $now-3600) {
667 unlink("$vardir/$f");
671 $main::read_parse_mime_callback_flushed++;
674 # Only update file once per percent
675 my $upfile = "$vardir/upload.$id";
676 if ($totalsize && $size >= 0) {
677 my $pc = int(100 * $size / $totalsize);
678 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
681 $main::read_parse_mime_callback_pc{$upfile} = $pc;
685 &open_tempfile(UPFILE, ">$upfile");
686 print UPFILE $size,"\n";
687 print UPFILE $totalsize,"\n";
688 print UPFILE $filename,"\n";
689 &close_tempfile(UPFILE);
692 =head2 read_parse_mime_javascript(upload-id, [&fields])
694 Returns an onSubmit= Javascript statement to popup a window for tracking
695 an upload with the given ID. For internal use by the upload progress tracker.
698 sub read_parse_mime_javascript
700 my ($id, $fields) = @_;
701 return "" if ($gconfig{'no_upload_tracker'});
702 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
704 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
705 return "onSubmit='if ($if) { $opener }'";
708 return "onSubmit='$opener'";
712 =head2 PrintHeader(charset)
714 Outputs the HTTP headers for an HTML page. The optional charset parameter
715 can be used to set a character set. Normally this function is not called
716 directly, but is rather called by ui_print_header or header.
721 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
722 print "pragma: no-cache\n";
723 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
724 print "Cache-Control: no-store, no-cache, must-revalidate\n";
725 print "Cache-Control: post-check=0, pre-check=0\n";
727 if (defined($_[0])) {
728 print "Content-type: text/html; Charset=$_[0]\n\n";
731 print "Content-type: text/html\n\n";
735 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
737 Outputs a Webmin HTML page header with a title, including HTTP headers. The
740 =item title - The text to show at the top of the page
742 =item image - An image to show instead of the title text. This is typically left blank.
744 =item help - If set, this is the name of a help page that will be linked to in the title.
746 =item config - If set to 1, the title will contain a link to the module's config page.
748 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
750 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
752 =item rightside - HTML to be shown on the right-hand side of the title. Can contain multiple lines, separated by <br>. Typically this is used for links to stop, start or restart servers.
754 =item head-stuff - HTML to be included in the <head> section of the page.
756 =item body-stuff - HTML attributes to be include in the <body> tag.
758 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
763 return if ($main::done_webmin_header++);
765 my $charset = defined($main::force_charset) ? $main::force_charset
767 &PrintHeader($charset);
768 &load_theme_library();
769 if (defined(&theme_header)) {
770 $module_name = &get_module_name();
774 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
777 if (defined(&theme_prehead)) {
781 print "<meta http-equiv=\"Content-Type\" ",
782 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
785 my $title = &get_html_title($_[0]);
786 print "<title>$title</title>\n";
787 print $_[7] if ($_[7]);
788 print &get_html_status_line(0);
790 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
791 if ($tconfig{'headinclude'}) {
792 print &read_file_contents(
793 "$theme_root_directory/$tconfig{'headinclude'}");
796 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
797 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
798 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
799 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
800 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
801 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
802 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
804 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
806 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
807 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
808 if (defined(&theme_prebody)) {
811 my $hostname = &get_display_hostname();
812 my $version = &get_webmin_version();
813 my $prebody = $tconfig{'prebody'};
815 $prebody =~ s/%HOSTNAME%/$hostname/g;
816 $prebody =~ s/%VERSION%/$version/g;
817 $prebody =~ s/%USER%/$remote_user/g;
818 $prebody =~ s/%OS%/$os_type $os_version/g;
821 if ($tconfig{'prebodyinclude'}) {
823 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
830 print $tconfig{'preheader'};
831 my %this_module_info = &get_module_info(&get_module_name());
832 print "<table class='header' width=100%><tr>\n";
833 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
834 print "<td id='headln1' colspan=3 align=center>\n";
835 print &get_html_status_line(1);
836 print "</td></tr> <tr>\n";
838 print "<td id='headln2l' width=15% valign=top align=left>";
839 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
840 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
841 "$text{'header_servers'}</a><br>\n";
843 if (!$_[5] && !$tconfig{'noindex'}) {
844 my @avail = &get_available_module_infos(1);
845 my $nolo = $ENV{'ANONYMOUS_USER'} ||
846 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
847 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
848 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
850 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
851 "$text{'main_logout'}</a><br>";
853 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
854 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
855 "$text{'main_switch'}</a><br>";
857 elsif (!$gconfig{'gotoone'} || @avail > 1) {
858 print "<a href='$gconfig{'webprefix'}/?cat=",
859 $this_module_info{'category'},
860 "'>$text{'header_webmin'}</a><br>\n";
863 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
864 my $idx = $this_module_info{'index_link'};
865 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
866 my $mt = $module_index_name || $text{'header_module'};
867 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
869 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
870 !$tconfig{'nohelp'}) {
871 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
874 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
875 !$tconfig{'nohelp'}) {
876 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
879 my %access = &get_module_acl();
880 if (!$access{'noconfig'} && !$config{'noprefs'}) {
881 my $cprog = $user_module_config_directory ?
882 "uconfig.cgi" : "config.cgi";
883 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
884 &get_module_name()."\">",
885 $text{'header_config'},"</a><br>\n";
890 # Title is a single image
891 print "<td id='headln2c' align=center width=70%>",
892 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
896 my $ts = defined($tconfig{'titlesize'}) ?
897 $tconfig{'titlesize'} : "+2";
898 print "<td id='headln2c' align=center width=70%>",
899 ($ts ? "<font size=$ts>" : ""),$_[0],
900 ($ts ? "</font>" : "");
901 print "<br>$_[9]\n" if ($_[9]);
904 print "<td id='headln2r' width=15% valign=top align=right>";
906 print "</td></tr></table>\n";
907 print $tconfig{'postheader'};
911 =head2 get_html_title(title)
913 Returns the full string to appear in the HTML <title> block.
920 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
921 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
922 my $host = &get_display_hostname();
923 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
924 $title = sprintf "%s : %s on %s (%s %s)\n",
925 $msg, $remote_user, $host,
926 $os_type, $os_version;
928 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
929 $title = sprintf "%s on %s (%s %s)\n",
931 $os_type, $os_version;
936 if ($gconfig{'showlogin'} && $remote_user) {
937 $title = $remote_user.($title ? " : ".$title : "");
939 if ($gconfig{'showhost'}) {
940 $title = $host.($title ? " : ".$title : "");
945 =head2 get_html_framed_title
947 Returns the title text for a framed theme main page.
950 sub get_html_framed_title
953 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
954 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
956 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
957 # Alternate title mode requested
958 $title = sprintf "%s on %s (%s %s)\n",
959 $remote_user, &get_display_hostname(),
960 $os_type, $os_version;
963 # Title like 'Webmin x.yy on hostname (Linux 6)'
964 if ($os_version eq "*") {
968 $ostr = "$os_type $os_version";
970 my $host = &get_display_hostname();
971 my $ver = &get_webmin_version();
972 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
973 $gconfig{'showhost'} ? &text('main_title3', $ver, $ostr) :
974 &text('main_title', $ver, $host, $ostr);
975 if ($gconfig{'showlogin'}) {
976 $title = $remote_user.($title ? " : ".$title : "");
978 if ($gconfig{'showhost'}) {
979 $title = $host.($title ? " : ".$title : "");
985 =head2 get_html_status_line(text-only)
987 Returns HTML for a script block that sets the status line, or if text-only
988 is set to 1, just return the status line text.
991 sub get_html_status_line
994 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
995 # Disabled in this mode
998 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
999 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
1000 my $line = &text('header_statusmsg',
1001 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
1003 ($ENV{'SSL_USER'} ? " (SSL certified)" :
1004 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1005 $text{'programname'},
1006 &get_webmin_version(),
1007 &get_display_hostname(),
1008 $os_type.($os_version eq "*" ? "" :" $os_version"));
1013 $line =~ s/\r|\n//g;
1014 return "<script language=JavaScript type=text/javascript>\n".
1015 "defaultStatus=\""."e_escape($line)."\";\n".
1020 =head2 popup_header([title], [head-stuff], [body-stuff], [no-body])
1022 Outputs a page header, suitable for a popup window. If no title is given,
1023 absolutely no decorations are output. Also useful in framesets. The parameters
1026 =item title - Title text for the popup window.
1028 =item head-stuff - HTML to appear in the <head> section.
1030 =item body-stuff - HTML attributes to be include in the <body> tag.
1032 =item no-body - If set to 1, don't generate a body tag
1037 return if ($main::done_webmin_header++);
1039 my $charset = defined($main::force_charset) ? $main::force_charset
1041 &PrintHeader($charset);
1042 &load_theme_library();
1043 if (defined(&theme_popup_header)) {
1044 &theme_popup_header(@_);
1047 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1050 if (defined(&theme_popup_prehead)) {
1051 &theme_popup_prehead(@_);
1053 print "<title>$_[0]</title>\n";
1055 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1056 if ($tconfig{'headinclude'}) {
1057 print &read_file_contents(
1058 "$theme_root_directory/$tconfig{'headinclude'}");
1061 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1062 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1063 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1064 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1065 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1066 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1067 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1070 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1071 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1072 if (defined(&theme_popup_prebody)) {
1073 &theme_popup_prebody(@_);
1078 =head2 footer([page, name]+, [noendbody])
1080 Outputs the footer for a Webmin HTML page, possibly with links back to other
1081 pages. The links are specified by pairs of parameters, the first of which is
1082 a link destination, and the second the link text. For example :
1084 footer('/', 'Webmin index', '', 'Module menu');
1089 &load_theme_library();
1090 my %this_module_info = &get_module_info(&get_module_name());
1091 if (defined(&theme_footer)) {
1092 $module_name = &get_module_name(); # Old themes use these
1093 %module_info = %this_module_info;
1097 for(my $i=0; $i+1<@_; $i+=2) {
1099 if ($url ne '/' || !$tconfig{'noindex'}) {
1101 $url = "/?cat=$this_module_info{'category'}";
1103 elsif ($url eq '' && &get_module_name()) {
1104 $url = "/".&get_module_name()."/".
1105 $this_module_info{'index_link'};
1107 elsif ($url =~ /^\?/ && &get_module_name()) {
1108 $url = "/".&get_module_name()."/$url";
1110 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1112 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1117 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1122 my $postbody = $tconfig{'postbody'};
1124 my $hostname = &get_display_hostname();
1125 my $version = &get_webmin_version();
1126 my $os_type = $gconfig{'real_os_type'} ||
1127 $gconfig{'os_type'};
1128 my $os_version = $gconfig{'real_os_version'} ||
1129 $gconfig{'os_version'};
1130 $postbody =~ s/%HOSTNAME%/$hostname/g;
1131 $postbody =~ s/%VERSION%/$version/g;
1132 $postbody =~ s/%USER%/$remote_user/g;
1133 $postbody =~ s/%OS%/$os_type $os_version/g;
1134 print "$postbody\n";
1136 if ($tconfig{'postbodyinclude'}) {
1138 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1144 if (defined(&theme_postbody)) {
1145 &theme_postbody(@_);
1147 print "</body></html>\n";
1151 =head2 popup_footer([no-body])
1153 Outputs html for a footer for a popup window, started by popup_header.
1158 &load_theme_library();
1159 if (defined(&theme_popup_footer)) {
1160 &theme_popup_footer(@_);
1169 =head2 load_theme_library
1171 Immediately loads the current theme's theme.pl file. Not generally useful for
1172 most module developers, as this is called automatically by the header function.
1175 sub load_theme_library
1177 return if (!$current_theme || $loaded_theme_library++);
1178 for(my $i=0; $i<@theme_root_directories; $i++) {
1179 if ($theme_configs[$i]->{'functions'}) {
1180 do $theme_root_directories[$i]."/".
1181 $theme_configs[$i]->{'functions'};
1186 =head2 redirect(url)
1188 Output HTTP headers to redirect the browser to some page. The url parameter is
1189 typically a relative URL like index.cgi or list_users.cgi.
1194 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1195 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1196 ":$ENV{'SERVER_PORT'}";
1197 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1198 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1200 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1201 # Absolute URL (like http://...)
1204 elsif ($_[0] =~ /^\//) {
1205 # Absolute path (like /foo/bar.cgi)
1206 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1208 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1209 # Relative URL (like foo.cgi)
1210 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1213 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1215 &load_theme_library();
1216 if (defined(&theme_redirect)) {
1217 $module_name = &get_module_name(); # Old themes use these
1218 %module_info = &get_module_info($module_name);
1219 &theme_redirect($_[0], $url);
1222 print "Location: $url\n\n";
1226 =head2 kill_byname(name, signal)
1228 Finds a process whose command line contains the given name (such as httpd), and
1229 sends some signal to it. The signal can be numeric (like 9) or named
1235 my @pids = &find_byname($_[0]);
1236 return scalar(@pids) if (&is_readonly_mode());
1237 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1238 if ($gconfig{'debug_what_procs'});
1239 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1243 =head2 kill_byname_logged(name, signal)
1245 Like kill_byname, but also logs the killing.
1248 sub kill_byname_logged
1250 my @pids = &find_byname($_[0]);
1251 return scalar(@pids) if (&is_readonly_mode());
1252 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1256 =head2 find_byname(name)
1258 Finds processes searching for the given name in their command lines, and
1259 returns a list of matching PIDs.
1264 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1265 # Linux with /proc filesystem .. use cmdline files, as this is
1266 # faster than forking
1268 opendir(PROCDIR, "/proc");
1269 foreach my $f (readdir(PROCDIR)) {
1270 if ($f eq int($f) && $f != $$) {
1271 my $line = &read_file_contents("/proc/$f/cmdline");
1272 if ($line =~ /$_[0]/) {
1281 if (&foreign_check("proc")) {
1282 # Call the proc module
1283 &foreign_require("proc", "proc-lib.pl");
1284 if (defined(&proc::list_processes)) {
1285 my @procs = &proc::list_processes();
1287 foreach my $p (@procs) {
1288 if ($p->{'args'} =~ /$_[0]/) {
1289 push(@pids, $p->{'pid'});
1292 @pids = grep { $_ != $$ } @pids;
1297 # Fall back to running a command
1299 $cmd = $gconfig{'find_pid_command'};
1300 $cmd =~ s/NAME/"$_[0]"/g;
1301 $cmd = &translate_command($cmd);
1302 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1303 @pids = grep { $_ != $$ } @pids;
1307 =head2 error([message]+)
1309 Display an error message and exit. This should be used by CGI scripts that
1310 encounter a fatal error or invalid user input to notify users of the problem.
1311 If error_setup has been called, the displayed error message will be prefixed
1312 by the message setup using that function.
1317 my $msg = join("", @_);
1318 $msg =~ s/<[^>]*>//g;
1319 if (!$main::error_must_die) {
1320 print STDERR "Error: ",$msg,"\n";
1322 &load_theme_library();
1323 if ($main::error_must_die) {
1324 if ($gconfig{'error_stack'}) {
1325 print STDERR "Error: ",$msg,"\n";
1326 for(my $i=0; my @stack = caller($i); $i++) {
1327 print STDERR "File: $stack[1] Line: $stack[2] ",
1328 "Function: $stack[3]\n";
1333 elsif (!$ENV{'REQUEST_METHOD'}) {
1334 # Show text-only error
1335 print STDERR "$text{'error'}\n";
1336 print STDERR "-----\n";
1337 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1339 print STDERR "-----\n";
1340 if ($gconfig{'error_stack'}) {
1342 print STDERR $text{'error_stack'},"\n";
1343 for(my $i=0; my @stack = caller($i); $i++) {
1344 print STDERR &text('error_stackline',
1345 $stack[1], $stack[2], $stack[3]),"\n";
1350 elsif (defined(&theme_error)) {
1354 &header($text{'error'}, "");
1356 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1358 if ($gconfig{'error_stack'}) {
1360 print "<h3>$text{'error_stack'}</h3>\n";
1362 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1363 "<td><b>$text{'error_line'}</b></td> ",
1364 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1365 for($i=0; my @stack = caller($i); $i++) {
1367 print "<td>$stack[1]</td>\n";
1368 print "<td>$stack[2]</td>\n";
1369 print "<td>$stack[3]</td>\n";
1375 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1376 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1382 &unlock_all_files();
1383 &cleanup_tempnames();
1387 =head2 popup_error([message]+)
1389 This function is almost identical to error, but displays the message with HTML
1390 headers suitable for a popup window.
1395 &load_theme_library();
1396 if ($main::error_must_die) {
1399 elsif (defined(&theme_popup_error)) {
1400 &theme_popup_error(@_);
1403 &popup_header($text{'error'}, "");
1404 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1407 &unlock_all_files();
1408 &cleanup_tempnames();
1412 =head2 error_setup(message)
1414 Registers a message to be prepended to all error messages displayed by the
1420 $main::whatfailed = $_[0];
1423 =head2 wait_for(handle, regexp, regexp, ...)
1425 Reads from the input stream until one of the regexps matches, and returns the
1426 index of the matching regexp, or -1 if input ended before any matched. This is
1427 very useful for parsing the output of interactive programs, and can be used with
1428 a two-way pipe to feed input to a program in response to output matched by
1431 If the matching regexp contains bracketed sub-expressions, their values will
1432 be placed in the global array @matches, indexed starting from 1. You cannot
1433 use the Perl variables $1, $2 and so on to capture matches.
1437 $rv = wait_for($loginfh, "username:");
1439 error("Didn't get username prompt");
1441 print $loginfh "joe\n";
1442 $rv = wait_for($loginfh, "password:");
1444 error("Didn't get password prompt");
1446 print $loginfh "smeg\n";
1451 my ($c, $i, $sw, $rv, $ha);
1452 undef($wait_for_input);
1453 if ($wait_for_debug) {
1454 print STDERR "wait_for(",join(",", @_),")\n";
1456 $ha = &callers_package($_[0]);
1457 if ($wait_for_debug) {
1458 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1463 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1464 " \$wait_for_input .= \$c;\n";
1465 if ($wait_for_debug) {
1466 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1468 for($i=1; $i<@_; $i++) {
1469 $sw = $i>1 ? "elsif" : "if";
1470 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1473 " if (defined(\$hit)) {\n".
1474 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1480 &error("wait_for error : $@\n");
1485 =head2 fast_wait_for(handle, string, string, ...)
1487 This function behaves very similar to wait_for (documented above), but instead
1488 of taking regular expressions as parameters, it takes strings. As soon as the
1489 input contains one of them, it will return the index of the matching string.
1490 If the input ends before any match, it returns -1.
1495 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1496 for($i=1; $i<@_; $i++) {
1497 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1501 if (($c = getc($ha)) eq "") {
1502 &error("fast_wait_for read error : $!");
1505 if (length($inp) > $maxlen) {
1506 $inp = substr($inp, length($inp)-$maxlen);
1508 $inpl = length($inp);
1509 for($i=1; $i<@_; $i++) {
1510 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1517 =head2 has_command(command)
1519 Returns the full path to the executable if some command is in the path, or
1520 undef if not found. If the given command is already an absolute path and
1521 exists, then the same path will be returned.
1526 if (!$_[0]) { return undef; }
1527 if (exists($main::has_command_cache{$_[0]})) {
1528 return $main::has_command_cache{$_[0]};
1531 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1532 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1533 # Absolute path given - just use it
1534 my $t = &translate_filename($_[0]);
1535 $rv = (-x $t && !-d _) ? $_[0] : undef;
1538 # Check each directory in the path
1540 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1541 next if ($donedir{$d}++);
1542 $d =~ s/$slash$// if ($d ne $slash);
1543 my $t = &translate_filename("$d/$_[0]");
1544 if (-x $t && !-d _) {
1545 $rv = $d.$slash.$_[0];
1548 if ($gconfig{'os_type'} eq 'windows') {
1549 foreach my $sfx (".exe", ".com", ".bat") {
1550 my $t = &translate_filename("$d/$_[0]").$sfx;
1551 if (-r $t && !-d _) {
1552 $rv = $d.$slash.$_[0].$sfx;
1559 $main::has_command_cache{$_[0]} = $rv;
1563 =head2 make_date(seconds, [date-only], [fmt])
1565 Converts a Unix date/time in seconds to a human-readable form, by default
1566 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1568 =item seconds - Unix time is seconds to convert.
1570 =item date-only - If set to 1, exclude the time from the returned string.
1572 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1577 my ($secs, $only, $fmt) = @_;
1578 my @tm = localtime($secs);
1581 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1583 if ($fmt eq 'dd/mon/yyyy') {
1584 $date = sprintf "%2.2d/%s/%4.4d",
1585 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1587 elsif ($fmt eq 'dd/mm/yyyy') {
1588 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1590 elsif ($fmt eq 'mm/dd/yyyy') {
1591 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1593 elsif ($fmt eq 'yyyy/mm/dd') {
1594 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1597 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1602 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1604 Return HTML for a button that pops up a file chooser when clicked, and places
1605 the selected filename into another HTML field. The parameters are :
1607 =item input - Name of the form field to store the filename in.
1609 =item type - 0 for file or directory chooser, or 1 for directory only.
1611 =item form - Index of the form containing the button.
1613 =item chroot - If set to 1, the chooser will be limited to this directory.
1615 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1618 sub file_chooser_button
1620 return &theme_file_chooser_button(@_)
1621 if (defined(&theme_file_chooser_button));
1622 my $form = defined($_[2]) ? $_[2] : 0;
1623 my $chroot = defined($_[3]) ? $_[3] : "/";
1624 my $add = int($_[4]);
1625 my ($w, $h) = (400, 300);
1626 if ($gconfig{'db_sizefile'}) {
1627 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1629 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/chooser.cgi?add=$add&type=$_[1]&chroot=$chroot&file=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=no,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
1632 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1634 Returns HTML for a button that will popup a chooser window of some kind. The
1637 =item url - Base URL of the popup window's contents
1639 =item width - Width of the window in pixels
1641 =item height - Height in pixels
1643 =item scrollbars - Set to 1 if the window should have scrollbars
1645 The field-mappings parameter is an array ref of array refs containing
1647 =item - Attribute to assign field to in the popup window
1649 =item - Form field name
1651 =item - CGI parameter to URL for value, if any
1654 sub popup_window_button
1656 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1657 my ($url, $w, $h, $scroll, $fields) = @_;
1658 my $scrollyn = $scroll ? "yes" : "no";
1659 my $rv = "<input type=button onClick='";
1660 foreach my $m (@$fields) {
1661 $rv .= "$m->[0] = form.$m->[1]; ";
1663 my $sep = $url =~ /\?/ ? "&" : "?";
1664 $rv .= "chooser = window.open(\"$url\"";
1665 foreach my $m (@$fields) {
1667 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1671 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1672 foreach my $m (@$fields) {
1673 $rv .= "chooser.$m->[0] = $m->[0]; ";
1674 $rv .= "window.$m->[0] = $m->[0]; ";
1676 $rv .= "' value=\"...\">";
1680 =head2 read_acl(&user-module-hash, &user-list-hash)
1682 Reads the Webmin acl file into the given hash references. The first is indexed
1683 by a combined key of username,module , with the value being set to 1 when
1684 the user has access to that module. The second is indexed by username, with
1685 the value being an array ref of allowed modules.
1687 This function is deprecated in favour of foreign_available, which performs a
1688 more comprehensive check of module availability.
1693 if (!defined(%main::acl_hash_cache)) {
1695 open(ACL, &acl_filename());
1697 if (/^([^:]+):\s*(.*)/) {
1699 my @mods = split(/\s+/, $2);
1700 foreach my $m (@mods) {
1701 $main::acl_hash_cache{$user,$m}++;
1703 $main::acl_array_cache{$user} = \@mods;
1708 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1709 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1714 Returns the file containing the webmin ACL, which is usually
1715 /etc/webmin/webmin.acl.
1720 return "$config_directory/webmin.acl";
1725 Does nothing, but kept around for compatability.
1732 =head2 get_miniserv_config(&hash)
1734 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1735 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1739 sub get_miniserv_config
1741 return &read_file_cached(
1742 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1745 =head2 put_miniserv_config(&hash)
1747 Writes out the Webmin webserver configuration file from the contents of
1748 the given hash ref. This should be initially populated by get_miniserv_config,
1751 get_miniserv_config(\%miniserv);
1752 $miniserv{'port'} = 10005;
1753 put_miniserv_config(\%miniserv);
1757 sub put_miniserv_config
1759 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1763 =head2 restart_miniserv([nowait])
1765 Kill the old miniserv process and re-start it, then optionally waits for
1766 it to restart. This will apply all configuration settings.
1769 sub restart_miniserv
1772 return undef if (&is_readonly_mode());
1774 &get_miniserv_config(\%miniserv) || return;
1777 if ($gconfig{'os_type'} ne 'windows') {
1778 # On Unix systems, we can restart with a signal
1779 my ($pid, $addr, $i);
1780 $miniserv{'inetd'} && return;
1781 my @oldst = stat($miniserv{'pidfile'});
1782 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1785 if (!$pid) { &error("Invalid PID file"); }
1787 # Just signal miniserv to restart
1788 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1790 # Wait till new PID is written, indicating a restart
1791 for($i=0; $i<60; $i++) {
1793 my @newst = stat($miniserv{'pidfile'});
1794 last if ($newst[9] != $oldst[9]);
1796 $i < 60 || &error("Webmin server did not write new PID file");
1798 ## Totally kill the process and re-run it
1799 #$SIG{'TERM'} = 'IGNORE';
1800 #&kill_logged('TERM', $pid);
1801 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1804 # On Windows, we need to use the flag file
1805 open(TOUCH, ">$miniserv{'restartflag'}");
1810 # wait for miniserv to come back up
1811 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1813 for($i=0; $i<20; $i++) {
1815 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1816 my $rv = connect(STEST,
1817 pack_sockaddr_in($miniserv{'port'}, $addr));
1819 last if ($rv && ++$ok >= 2);
1821 $i < 20 || &error("Failed to restart Webmin server!");
1825 =head2 reload_miniserv
1827 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1828 configuration files. Not all changes will be applied though, such as the
1829 IP addresses and ports to accept connections on.
1834 return undef if (&is_readonly_mode());
1836 &get_miniserv_config(\%miniserv) || return;
1838 if ($gconfig{'os_type'} ne 'windows') {
1839 # Send a USR1 signal to re-read the config
1840 my ($pid, $addr, $i);
1841 $miniserv{'inetd'} && return;
1842 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1845 if (!$pid) { &error("Invalid PID file"); }
1846 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1848 # Make sure this didn't kill Webmin!
1850 if (!kill(0, $pid)) {
1851 print STDERR "USR1 signal killed Webmin - restarting\n";
1852 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1856 # On Windows, we need to use the flag file
1857 open(TOUCH, ">$miniserv{'reloadflag'}");
1862 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1864 Returns 1 if some module is supported on the current operating system, or the
1865 OS supplies as parameters. The parameters are :
1867 =item minfo - A hash ref of module information, as returned by get_module_info
1869 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1871 =item os-version - The Webmin OS version to use, such as 13.0
1873 =item api-only - If set to 1, considers a module supported if it provides an API to other modules on this OS, even if the majority of its functionality is not supported.
1876 sub check_os_support
1878 my $oss = $_[0]->{'os_support'};
1879 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1880 # May provide usable API
1881 $oss .= " ".$_[0]->{'api_os_support'};
1883 if ($_[0]->{'nozone'} && &running_in_zone()) {
1884 # Not supported in a Solaris Zone
1887 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1888 # Not supported in a Linux Vserver
1891 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1892 # Not supported in an OpenVZ container
1895 return 1 if (!$oss || $oss eq '*');
1896 my $osver = $_[2] || $gconfig{'os_version'};
1897 my $ostype = $_[1] || $gconfig{'os_type'};
1900 my ($os, $ver, $codes);
1901 my ($neg) = ($oss =~ s/^!//); # starts with !
1902 $anyneg++ if ($neg);
1903 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1905 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1907 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1909 $os = $1; $ver = $2; $oss = $3;
1911 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1913 $os = $1; $codes = $2; $oss = $3;
1915 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1917 $codes = $1; $oss = $2;
1919 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1921 $os = $1; $oss = $2;
1924 next if ($os && !($os eq $ostype ||
1925 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1926 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1927 next if ($osver < $1 || $osver > $2);
1929 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1930 next if ($osver < $1);
1932 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1933 next if ($osver > $1);
1936 next if ($ver ne $osver);
1938 next if ($codes && !eval $codes);
1944 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1946 Downloads data from a HTTP url to a local file or string. The parameters are :
1948 =item host - The hostname part of the URL, such as www.google.com
1950 =item port - The HTTP port number, such as 80
1952 =item page - The filename part of the URL, like /index.html
1954 =item destfile - The local file to save the URL data to, like /tmp/index.html. This can also be a scalar reference, in which case the data will be appended to that scalar.
1956 =item error - If set to a scalar ref, the function will store any error message in this scalar and return 0 on failure, or 1 on success. If not set, it will simply call the error function if the download fails.
1958 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
1960 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
1962 =item user - If set, HTTP authentication is done with this username.
1964 =item pass - The HTTP password to use with the username above.
1966 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
1968 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
1970 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
1972 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
1977 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
1978 $timeout, $osdn, $nocache, $headers) = @_;
1979 if ($gconfig{'debug_what_net'}) {
1980 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
1981 ($user ? " user=$user pass=$pass" : "").
1982 (ref($dest) ? "" : " dest=$dest"));
1985 # Convert OSDN URL first
1986 my $prot = $ssl ? "https://" : "http://";
1987 my $portstr = $ssl && $port == 443 ||
1988 !$ssl && $port == 80 ? "" : ":$port";
1989 ($host, $port, $page, $ssl) = &parse_http_url(
1990 &convert_osdn_url($prot.$host.$portstr.$page));
1993 # Check if we already have cached the URL
1994 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
1995 my $cfile = &check_in_http_cache($url);
1996 if ($cfile && !$nocache) {
1997 # Yes! Copy to dest file or variable
1998 &$cbfunc(6, $url) if ($cbfunc);
2000 &open_readfile(CACHEFILE, $cfile);
2002 $$dest = <CACHEFILE>;
2006 ©_source_dest($cfile, $dest);
2013 push(@headers, [ "Host", $host ]);
2014 push(@headers, [ "User-agent", "Webmin" ]);
2016 my $auth = &encode_base64("$user:$pass");
2017 $auth =~ tr/\r\n//d;
2018 push(@headers, [ "Authorization", "Basic $auth" ]);
2020 foreach my $hname (keys %$headers) {
2021 push(@headers, [ $hname, $headers->{$hname} ]);
2024 # Actually download it
2025 $main::download_timed_out = undef;
2026 local $SIG{ALRM} = \&download_timeout;
2027 alarm($timeout || 60);
2028 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2030 $h = $main::download_timed_out if ($main::download_timed_out);
2032 if ($error) { $$error = $h; return; }
2033 else { &error($h); }
2035 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2036 $headers, $ssl, $nocache);
2037 if ((!$error || !$$error) && !$nocache) {
2038 &write_to_http_cache($url, $dest);
2042 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2044 Do a HTTP download, after the headers have been sent. For internal use only,
2045 typically called by http_download.
2048 sub complete_http_download
2050 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2056 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2057 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2059 if ($_[2]) { ${$_[2]} = $line; return; }
2060 else { &error("Download failed : $line"); }
2063 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2066 $line = &read_http_connection($_[0]);
2067 $line =~ tr/\r\n//d;
2068 $line =~ /^(\S+):\s+(.*)$/ || last;
2069 $header{lc($1)} = $2;
2070 push(@headers, [ lc($1), $2 ]);
2073 if ($main::download_timed_out) {
2074 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2075 else { &error($main::download_timed_out); }
2077 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2078 if ($rcode >= 300 && $rcode < 400) {
2079 # follow the redirect
2080 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2081 my ($host, $port, $page, $ssl);
2082 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2083 $ssl = $1 eq 'https' ? 1 : 0;
2084 $host = $2; $port = $3; $page = $4 || "/";
2086 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2087 $ssl = $1 eq 'https' ? 1 : 0;
2088 $host = $2; $port = 80; $page = $3 || "/";
2090 elsif ($header{'location'} =~ /^\// && $_[5]) {
2091 # Relative to same server
2095 $page = $header{'location'};
2097 elsif ($header{'location'}) {
2098 # Assume relative to same dir .. not handled
2099 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2100 else { &error("Invalid Location header $header{'location'}"); }
2103 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2104 else { &error("Missing Location header"); }
2107 ($page, $params) = split(/\?/, $page);
2109 $page .= "?".$params if (defined($params));
2110 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2111 undef, undef, undef, $_[4], $_[9], $_[7]);
2116 # Append to a variable
2117 while(defined($buf = &read_http_connection($_[0], 1024))) {
2119 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2125 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2126 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2127 else { &error("Failed to write to $_[1] : $!"); }
2129 binmode(PFILE); # For windows
2130 while(defined($buf = &read_http_connection($_[0], 1024))) {
2131 &print_tempfile(PFILE, $buf);
2132 $got += length($buf);
2133 &$cbfunc(3, $got) if ($cbfunc);
2135 &close_tempfile(PFILE);
2136 if ($header{'content-length'} &&
2137 $got != $header{'content-length'}) {
2138 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2139 else { &error("Download incomplete"); }
2142 &$cbfunc(4) if ($cbfunc);
2144 &close_http_connection($_[0]);
2148 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2150 Download data from an FTP site to a local file. The parameters are :
2152 =item host - FTP server hostname
2154 =item file - File on the FTP server to download
2156 =item destfile - File on the Webmin system to download data to
2158 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2160 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2162 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2164 =item pass - Password for the username above.
2166 =item port - FTP server port number, which defaults to 21 if not set.
2171 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2173 if ($gconfig{'debug_what_net'}) {
2174 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2175 ($user ? " user=$user pass=$pass" : "").
2176 (ref($dest) ? "" : " dest=$dest"));
2180 if (&is_readonly_mode()) {
2181 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2183 else { &error("FTP connections not allowed in readonly mode"); }
2186 # Check if we already have cached the URL
2187 my $url = "ftp://".$host.$file;
2188 my $cfile = &check_in_http_cache($url);
2190 # Yes! Copy to dest file or variable
2191 &$cbfunc(6, $url) if ($cbfunc);
2193 &open_readfile(CACHEFILE, $cfile);
2195 $$dest = <CACHEFILE>;
2199 ©_source_dest($cfile, $dest);
2204 # Actually download it
2205 $main::download_timed_out = undef;
2206 local $SIG{ALRM} = \&download_timeout;
2209 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2210 # download through http-style proxy
2212 if (&open_socket($1, $2, "SOCK", \$error)) {
2214 if ($main::download_timed_out) {
2216 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2217 else { &error($main::download_timed_out); }
2219 my $esc = $_[1]; $esc =~ s/ /%20/g;
2220 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2221 my $portstr = $port == 21 ? "" : ":$port";
2222 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2223 print SOCK "User-agent: Webmin\r\n";
2224 if ($gconfig{'proxy_user'}) {
2225 my $auth = &encode_base64(
2226 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2227 $auth =~ tr/\r\n//d;
2228 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2231 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2234 elsif (!$gconfig{'proxy_fallback'}) {
2236 if ($error) { $$error = $main::download_timed_out; return 0; }
2237 else { &error($main::download_timed_out); }
2242 # connect to host and login with real FTP protocol
2243 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2245 if ($main::download_timed_out) {
2246 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2247 else { &error($main::download_timed_out); }
2249 &ftp_command("", 2, $_[3]) || return 0;
2251 # Login as supplied user
2252 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2254 if (int($urv[1]/100) == 3) {
2255 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2259 # Login as anonymous
2260 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2262 if (int($urv[1]/100) == 3) {
2263 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2267 &$cbfunc(1, 0) if ($cbfunc);
2270 # get the file size and tell the callback
2271 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2272 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2273 defined($size) || return 0;
2275 &$cbfunc(2, int($size));
2279 my $pasv = &ftp_command("PASV", 2, $_[3]);
2280 defined($pasv) || return 0;
2281 $pasv =~ /\(([0-9,]+)\)/;
2282 @n = split(/,/ , $1);
2283 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2284 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2285 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2289 &open_tempfile(PFILE, ">$_[2]", 1);
2290 while(read(CON, $buf, 1024) > 0) {
2291 &print_tempfile(PFILE, $buf);
2292 $got += length($buf);
2293 &$cbfunc(3, $got) if ($cbfunc);
2295 &close_tempfile(PFILE);
2297 if ($got != $size) {
2298 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2299 else { &error("Download incomplete"); }
2301 &$cbfunc(4) if ($cbfunc);
2303 &ftp_command("", 2, $_[3]) || return 0;
2307 &ftp_command("QUIT", 2, $_[3]) || return 0;
2311 &write_to_http_cache($url, $dest);
2315 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2317 Upload data from a local file to an FTP site. The parameters are :
2319 =item host - FTP server hostname
2321 =item file - File on the FTP server to write to
2323 =item srcfile - File on the Webmin system to upload data from
2325 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2327 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2329 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2331 =item pass - Password for the username above.
2333 =item port - FTP server port number, which defaults to 21 if not set.
2340 if (&is_readonly_mode()) {
2341 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2343 else { &error("FTP connections not allowed in readonly mode"); }
2346 $main::download_timed_out = undef;
2347 local $SIG{ALRM} = \&download_timeout;
2350 # connect to host and login
2351 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2353 if ($main::download_timed_out) {
2354 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2355 else { &error($main::download_timed_out); }
2357 &ftp_command("", 2, $_[3]) || return 0;
2359 # Login as supplied user
2360 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2362 if (int($urv[1]/100) == 3) {
2363 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2367 # Login as anonymous
2368 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2370 if (int($urv[1]/100) == 3) {
2371 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2375 &$cbfunc(1, 0) if ($cbfunc);
2377 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2379 # get the file size and tell the callback
2380 my @st = stat($_[2]);
2382 &$cbfunc(2, $st[7]);
2386 my $pasv = &ftp_command("PASV", 2, $_[3]);
2387 defined($pasv) || return 0;
2388 $pasv =~ /\(([0-9,]+)\)/;
2389 @n = split(/,/ , $1);
2390 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2391 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2396 while(read(PFILE, $buf, 1024) > 0) {
2398 $got += length($buf);
2399 &$cbfunc(3, $got) if ($cbfunc);
2403 if ($got != $st[7]) {
2404 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2405 else { &error("Upload incomplete"); }
2407 &$cbfunc(4) if ($cbfunc);
2410 &ftp_command("", 2, $_[3]) || return 0;
2411 &ftp_command("QUIT", 2, $_[3]) || return 0;
2417 =head2 no_proxy(host)
2419 Checks if some host is on the no proxy list. For internal use by the
2420 http_download and ftp_download functions.
2425 my $ip = &to_ipaddress($_[0]);
2426 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2427 return 1 if ($_[0] =~ /\Q$n\E/ ||
2433 =head2 open_socket(host, port, handle, [&error])
2435 Open a TCP connection to some host and port, using a file handle. The
2438 =item host - Hostname or IP address to connect to.
2440 =item port - TCP port number.
2442 =item handle - A file handle name to use for the connection.
2444 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2449 my ($host, $port, $fh, $err) = @_;
2450 $fh = &callers_package($fh);
2452 if ($gconfig{'debug_what_net'}) {
2453 &webmin_debug_log('TCP', "host=$host port=$port");
2455 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2456 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2457 else { &error("Failed to create socket : $!"); }
2460 if (!($addr = inet_aton($host))) {
2461 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2462 else { &error("Failed to lookup IP address for $host"); }
2464 if ($gconfig{'bind_proxy'}) {
2465 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2466 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2467 else { &error("Failed to bind to source address : $!"); }
2470 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2471 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2472 else { &error("Failed to connect to $host:$port : $!"); }
2474 my $old = select($fh); $| =1; select($old);
2478 =head2 download_timeout
2480 Called when a download times out. For internal use only.
2483 sub download_timeout
2485 $main::download_timed_out = "Download timed out";
2488 =head2 ftp_command(command, expected, [&error], [filehandle])
2490 Send an FTP command, and die if the reply is not what was expected. Mainly
2491 for internal use by the ftp_download and ftp_upload functions.
2496 my ($cmd, $expect, $err, $fh) = @_;
2498 $fh = &callers_package($fh);
2501 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2503 print $fh "$cmd\r\n";
2506 if (!($line = <$fh>)) {
2508 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2509 else { &error("Failed to read reply to $what"); }
2511 $line =~ /^(...)(.)(.*)$/;
2514 foreach my $c (@$expect) {
2515 $found++ if (int($1/100) == $c);
2519 $found++ if (int($1/100) == $_[1]);
2523 if ($err) { $$err = "$what failed : $3"; return undef; }
2524 else { &error("$what failed : $3"); }
2529 # Need to skip extra stuff..
2531 if (!($line = <$fh>)) {
2533 if ($$err) { $$err = "Failed to read reply to $what";
2535 else { &error("Failed to read reply to $what"); }
2537 $line =~ /^(....)(.*)$/; $reply .= $2;
2538 if ($1 eq "$rcode ") { last; }
2542 return wantarray ? ($reply, $rcode) : $reply;
2545 =head2 to_ipaddress(hostname)
2547 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2548 it cannot be resolved.
2553 if (&check_ipaddress($_[0])) {
2557 my $hn = gethostbyname($_[0]);
2558 return undef if (!$hn);
2559 local @ip = unpack("CCCC", $hn);
2560 return join("." , @ip);
2564 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2566 Renders a 4-column table of icons. The useful parameters are :
2568 =item links - An array ref of link destination URLs for the icons.
2570 =item titles - An array ref of titles to appear under the icons.
2572 =item icons - An array ref of URLs for icon images.
2574 =item columns - Number of columns to layout the icons with. Defaults to 4.
2579 &load_theme_library();
2580 if (defined(&theme_icons_table)) {
2581 &theme_icons_table(@_);
2585 my $cols = $_[3] ? $_[3] : 4;
2586 my $per = int(100.0 / $cols);
2587 print "<table class='icons_table' width=100% cellpadding=5>\n";
2588 for(my $i=0; $i<@{$_[0]}; $i++) {
2589 if ($i%$cols == 0) { print "<tr>\n"; }
2590 print "<td width=$per% align=center valign=top>\n";
2591 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2592 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2593 $_[7]->[$i], $_[8]->[$i]);
2595 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2597 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2598 print "</tr>\n" if ($need_tr);
2602 =head2 replace_file_line(file, line, [newline]*)
2604 Replaces one line in some file with 0 or more new lines. The parameters are :
2606 =item file - Full path to some file, like /etc/hosts.
2608 =item line - Line number to replace, starting from 0.
2610 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2613 sub replace_file_line
2616 my $realfile = &translate_filename($_[0]);
2617 open(FILE, $realfile);
2620 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2621 else { splice(@lines, $_[1], 1); }
2622 &open_tempfile(FILE, ">$realfile");
2623 &print_tempfile(FILE, @lines);
2624 &close_tempfile(FILE);
2627 =head2 read_file_lines(file, [readonly])
2629 Returns a reference to an array containing the lines from some file. This
2630 array can be modified, and will be written out when flush_file_lines()
2631 is called. The parameters are :
2633 =item file - Full path to the file to read.
2635 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2639 $lref = read_file_lines("/etc/hosts");
2640 push(@$lref, "127.0.0.1 localhost");
2641 flush_file_lines("/etc/hosts");
2647 my ($package, $filename, $line) = caller;
2648 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2650 my $realfile = &translate_filename($_[0]);
2651 if (!$main::file_cache{$realfile}) {
2654 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2655 open(READFILE, $realfile);
2658 $eol = /\r\n$/ ? "\r\n" : "\n";
2664 $main::file_cache{$realfile} = \@lines;
2665 $main::file_cache_noflush{$realfile} = $_[1];
2666 $main::file_cache_eol{$realfile} = $eol || "\n";
2669 # Make read-write if currently readonly
2671 $main::file_cache_noflush{$realfile} = 0;
2674 return $main::file_cache{$realfile};
2677 =head2 flush_file_lines([file], [eol])
2679 Write out to a file previously read by read_file_lines to disk (except
2680 for those marked readonly). The parameters are :
2682 =item file - The file to flush out.
2684 =item eof - End-of-line character for each line. Defaults to \n.
2687 sub flush_file_lines
2691 local $trans = &translate_filename($_[0]);
2692 $main::file_cache{$trans} ||
2693 &error("flush_file_lines called on non-loaded file $trans");
2694 push(@files, $trans);
2697 @files = ( keys %main::file_cache );
2699 foreach my $f (@files) {
2700 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2701 if (!$main::file_cache_noflush{$f}) {
2702 no warnings; # XXX Bareword file handles should go away
2703 &open_tempfile(FLUSHFILE, ">$f");
2704 foreach my $line (@{$main::file_cache{$f}}) {
2705 (print FLUSHFILE $line,$eol) ||
2706 &error(&text("efilewrite", $f, $!));
2708 &close_tempfile(FLUSHFILE);
2710 delete($main::file_cache{$f});
2711 delete($main::file_cache_noflush{$f});
2715 =head2 unflush_file_lines(file)
2717 Clear the internal cache of some given file, previously read by read_file_lines.
2720 sub unflush_file_lines
2722 my $realfile = &translate_filename($_[0]);
2723 delete($main::file_cache{$realfile});
2724 delete($main::file_cache_noflush{$realfile});
2727 =head2 unix_user_input(fieldname, user, [form])
2729 Returns HTML for an input to select a Unix user. By default this is a text
2730 box with a user popup button next to it.
2735 if (defined(&theme_unix_user_input)) {
2736 return &theme_unix_user_input(@_);
2738 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2739 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2742 =head2 unix_group_input(fieldname, user, [form])
2744 Returns HTML for an input to select a Unix group. By default this is a text
2745 box with a group popup button next to it.
2748 sub unix_group_input
2750 if (defined(&theme_unix_group_input)) {
2751 return &theme_unix_group_input(@_);
2753 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2754 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2757 =head2 hlink(text, page, [module], [width], [height])
2759 Returns HTML for a link that when clicked on pops up a window for a Webmin
2760 help page. The parameters are :
2762 =item text - Text for the link.
2764 =item page - Help page code, such as 'intro'.
2766 =item module - Module the help page is in. Defaults to the current module.
2768 =item width - Width of the help popup window. Defaults to 600 pixels.
2770 =item height - Height of the help popup window. Defaults to 400 pixels.
2772 The actual help pages are in each module's help sub-directory, in files with
2778 if (defined(&theme_hlink)) {
2779 return &theme_hlink(@_);
2781 my $mod = $_[2] ? $_[2] : &get_module_name();
2782 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2783 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2784 return "<a onClick='window.open(\"$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>";
2787 =head2 user_chooser_button(field, multiple, [form])
2789 Returns HTML for a javascript button for choosing a Unix user or users.
2790 The parameters are :
2792 =item field - Name of the HTML field to place the username into.
2794 =item multiple - Set to 1 if multiple users can be selected.
2796 =item form - Index of the form on the page.
2799 sub user_chooser_button
2801 return undef if (!&supports_users());
2802 return &theme_user_chooser_button(@_)
2803 if (defined(&theme_user_chooser_button));
2804 my $form = defined($_[2]) ? $_[2] : 0;
2805 my $w = $_[1] ? 500 : 300;
2807 if ($_[1] && $gconfig{'db_sizeusers'}) {
2808 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2810 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2811 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2813 return "<input type=button onClick='ifield = form.$_[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";
2816 =head2 group_chooser_button(field, multiple, [form])
2818 Returns HTML for a javascript button for choosing a Unix group or groups
2819 The parameters are :
2821 =item field - Name of the HTML field to place the group name into.
2823 =item multiple - Set to 1 if multiple groups can be selected.
2825 =item form - Index of the form on the page.
2828 sub group_chooser_button
2830 return undef if (!&supports_users());
2831 return &theme_group_chooser_button(@_)
2832 if (defined(&theme_group_chooser_button));
2833 my $form = defined($_[2]) ? $_[2] : 0;
2834 my $w = $_[1] ? 500 : 300;
2836 if ($_[1] && $gconfig{'db_sizeusers'}) {
2837 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2839 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2840 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2842 return "<input type=button onClick='ifield = form.$_[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";
2845 =head2 foreign_check(module, [api-only])
2847 Checks if some other module exists and is supported on this OS. The parameters
2850 =item module - Name of the module to check.
2852 =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.
2857 my ($mod, $api) = @_;
2859 my $mdir = &module_root_directory($mod);
2860 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2861 return &check_os_support(\%minfo, undef, undef, $api);
2864 =head2 foreign_exists(module)
2866 Checks if some other module exists. The module parameter is the short module
2872 my $mdir = &module_root_directory($_[0]);
2873 return -r "$mdir/module.info";
2876 =head2 foreign_available(module)
2878 Returns 1 if some module is installed, and acessible to the current user. The
2879 module parameter is the module directory name.
2882 sub foreign_available
2884 return 0 if (!&foreign_check($_[0]) &&
2885 !$gconfig{'available_even_if_no_support'});
2886 my %foreign_module_info = &get_module_info($_[0]);
2888 # Check list of allowed modules
2890 &read_acl(\%acl, undef);
2891 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2892 !$acl{$base_remote_user,'*'});
2894 # Check for usermod restrictions
2895 my @usermods = &list_usermods();
2896 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2898 if (&get_product_name() eq "webmin") {
2899 # Check if the user has any RBAC privileges in this module
2900 if (&supports_rbac($_[0]) &&
2901 &use_rbac_module_acl(undef, $_[0])) {
2902 # RBAC is enabled for this user and module - check if he
2904 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2905 return 0 if (!$rbacs);
2907 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2908 # If denying access to modules not specifically allowed by
2909 # RBAC, then prevent access
2914 # Check readonly support
2915 if (&is_readonly_mode()) {
2916 return 0 if (!$foreign_module_info{'readonly'});
2919 # Check if theme vetos
2920 if (defined(&theme_foreign_available)) {
2921 return 0 if (!&theme_foreign_available($_[0]));
2924 # Check if licence module vetos
2925 if ($main::licence_module) {
2926 return 0 if (!&foreign_call($main::licence_module,
2927 "check_module_licence", $_[0]));
2933 =head2 foreign_require(module, [file], [package])
2935 Brings in functions from another module, and places them in the Perl namespace
2936 with the same name as the module. The parameters are :
2938 =item module - The source module's directory name, like sendmail.
2940 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2942 =item package - Perl package to place the module's functions and global variables in.
2944 If the original module name contains dashes, they will be replaced with _ in
2950 my ($mod, $file, $pkg) = @_;
2951 $pkg ||= $mod || "global";
2952 $pkg =~ s/[^A-Za-z0-9]/_/g;
2955 push(@files, $file);
2959 my %minfo = &get_module_info($mod);
2960 if ($minfo{'library'}) {
2961 @files = split(/\s+/, $minfo{'library'});
2964 @files = ( $mod."-lib.pl" );
2967 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
2968 return 1 if (!@files);
2969 foreach my $f (@files) {
2970 $main::done_foreign_require{$pkg,$f}++;
2973 my $mdir = &module_root_directory($mod);
2974 @INC = &unique($mdir, @INC);
2975 -d $mdir || &error("Module $mod does not exist");
2976 if (!&get_module_name() && $mod) {
2979 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
2980 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
2981 my $code = "package $pkg; ".
2982 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
2983 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
2984 foreach my $f (@files) {
2985 $code .= "do '$mdir/$f' || die \$@; ";
2988 if (defined($old_fmn)) {
2989 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
2992 delete($ENV{'FOREIGN_MODULE_NAME'});
2994 if (defined($old_frd)) {
2995 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
2998 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3001 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3005 =head2 foreign_call(module, function, [arg]*)
3007 Call a function in another module. The module parameter is the target module
3008 directory name, function is the perl sub to call, and the remaining parameters
3009 are the arguments. However, unless you need to call a function whose name
3010 is dynamic, it is better to use Perl's cross-module function call syntax
3011 like module::function(args).
3016 my $pkg = $_[0] || "global";
3017 $pkg =~ s/[^A-Za-z0-9]/_/g;
3018 my @args = @_[2 .. @_-1];
3019 $main::foreign_args = \@args;
3020 my @rv = eval <<EOF;
3022 &$_[1](\@{\$main::foreign_args});
3024 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3025 return wantarray ? @rv : $rv[0];
3028 =head2 foreign_config(module, [user-config])
3030 Get the configuration from another module, and return it as a hash. If the
3031 user-config parameter is set to 1, returns the Usermin user-level preferences
3032 for the current user instead.
3037 my ($mod, $uc) = @_;
3040 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3041 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3042 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3045 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3050 =head2 foreign_installed(module, mode)
3052 Checks if the server for some module is installed, and possibly also checks
3053 if the module has been configured by Webmin.
3054 For mode 1, returns 2 if the server is installed and configured for use by
3055 Webmin, 1 if installed but not configured, or 0 otherwise.
3056 For mode 0, returns 1 if installed, 0 if not.
3057 If the module does not provide an install_check.pl script, assumes that
3058 the server is installed.
3061 sub foreign_installed
3063 my ($mod, $configured) = @_;
3064 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3066 return $main::foreign_installed_cache{$mod,$configured};
3070 if (!&foreign_check($mod)) {
3075 my $mdir = &module_root_directory($mod);
3076 if (!-r "$mdir/install_check.pl") {
3077 # Not known, assume OK
3078 $rv = $configured ? 2 : 1;
3081 # Call function to check
3082 &foreign_require($mod, "install_check.pl");
3083 $rv = &foreign_call($mod, "is_installed", $configured);
3086 $main::foreign_installed_cache{$mod,$configured} = $rv;
3091 =head2 foreign_defined(module, function)
3093 Returns 1 if some function is defined in another module. In general, it is
3094 simpler to use the syntax &defined(module::function) instead.
3100 $pkg =~ s/[^A-Za-z0-9]/_/g;
3101 my $func = "${pkg}::$_[1]";
3102 return defined(&$func);
3105 =head2 get_system_hostname([short])
3107 Returns the hostname of this system. If the short parameter is set to 1,
3108 then the domain name is not prepended - otherwise, Webmin will attempt to get
3109 the fully qualified hostname, like foo.example.com.
3112 sub get_system_hostname
3115 if (!$main::get_system_hostname[$m]) {
3116 if ($gconfig{'os_type'} ne 'windows') {
3117 # Try some common Linux hostname files first
3119 if ($gconfig{'os_type'} eq 'redhat-linux') {
3121 &read_env_file("/etc/sysconfig/network", \%nc);
3122 if ($nc{'HOSTNAME'}) {
3123 $fromfile = $nc{'HOSTNAME'};
3126 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3127 my $hn = &read_file_contents("/etc/hostname");
3133 elsif ($gconfig{'os_type'} eq 'open-linux') {
3134 my $hn = &read_file_contents("/etc/HOSTNAME");
3140 elsif ($gconfig{'os_type'} eq 'solaris') {
3141 my $hn = &read_file_contents("/etc/nodename");
3148 # If we found a hostname, use it if value
3149 if ($fromfile && ($m || $fromfile =~ /\./)) {
3151 $fromfile =~ s/\..*$//;
3153 $main::get_system_hostname[$m] = $fromfile;
3157 # Can use hostname command on Unix
3158 &execute_command("hostname", undef,
3159 \$main::get_system_hostname[$m], undef, 0, 1);
3160 chop($main::get_system_hostname[$m]);
3162 eval "use Sys::Hostname";
3164 $main::get_system_hostname[$m] = eval "hostname()";
3166 if ($@ || !$main::get_system_hostname[$m]) {
3167 $main::get_system_hostname[$m] = "UNKNOWN";
3170 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3171 $gconfig{'os_type'} =~ /linux$/ &&
3172 !$gconfig{'no_hostname_f'} && !$_[0]) {
3173 # Try with -f flag to get fully qualified name
3175 my $ex = &execute_command("hostname -f", undef, \$flag,
3178 if ($ex || $flag eq "") {
3179 # -f not supported! We have probably set the
3180 # hostname to just '-f'. Fix the problem
3183 &execute_command("hostname ".
3184 quotemeta($main::get_system_hostname[$m]),
3185 undef, undef, undef, 0, 1);
3189 $main::get_system_hostname[$m] = $flag;
3194 # On Windows, try computername environment variable
3195 return $ENV{'computername'} if ($ENV{'computername'});
3196 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3198 # Fall back to net name command
3199 my $out = `net name 2>&1`;
3200 if ($out =~ /\-+\r?\n(\S+)/) {
3201 $main::get_system_hostname[$m] = $1;
3204 $main::get_system_hostname[$m] = "windows";
3208 return $main::get_system_hostname[$m];
3211 =head2 get_webmin_version
3213 Returns the version of Webmin currently being run, such as 1.450.
3216 sub get_webmin_version
3218 if (!$get_webmin_version) {
3219 open(VERSION, "$root_directory/version") || return 0;
3220 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3223 return $get_webmin_version;
3226 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3228 Returns a hash containing access control options for the given user and module.
3229 By default the current username and module name are used. If the no-rbac flag
3230 is given, the permissions will not be updated based on the user's RBAC role
3231 (as seen on Solaris). If the no-default flag is given, default permissions for
3232 the module will not be included.
3237 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3238 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3239 my $mdir = &module_root_directory($m);
3242 # Read default ACL first, to be overridden by per-user settings
3243 &read_file_cached("$mdir/defaultacl", \%rv);
3245 # If this isn't a master admin user, apply the negative permissions
3246 # so that he doesn't un-expectedly gain access to new features
3248 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3249 if ($gaccess{'negative'}) {
3250 &read_file_cached("$mdir/negativeacl", \%rv);
3254 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3255 # RBAC overrides exist for this user in this module
3256 my $rbac = &get_rbac_module_acl(
3257 defined($_[0]) ? $_[0] : $remote_user, $m);
3258 foreach my $r (keys %$rbac) {
3259 $rv{$r} = $rbac->{$r};
3262 elsif ($gconfig{"risk_$u"} && $m) {
3263 # ACL is defined by user's risk level
3264 my $rf = $gconfig{"risk_$u"}.'.risk';
3265 &read_file_cached("$mdir/$rf", \%rv);
3267 my $sf = $gconfig{"skill_$u"}.'.skill';
3268 &read_file_cached("$mdir/$sf", \%rv);
3271 # Use normal Webmin ACL, if a user is set
3272 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3273 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3274 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3277 if ($tconfig{'preload_functions'}) {
3278 &load_theme_library();
3280 if (defined(&theme_get_module_acl)) {
3281 %rv = &theme_get_module_acl($u, $m, \%rv);
3286 =head2 get_group_module_acl(group, [module])
3288 Returns the ACL for a Webmin group, in an optional module (which defaults to
3289 the current module).
3292 sub get_group_module_acl
3295 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3296 my $mdir = &module_root_directory($m);
3298 &read_file_cached("$mdir/defaultacl", \%rv);
3299 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3300 if (defined(&theme_get_module_acl)) {
3301 %rv = &theme_get_module_acl($g, $m, \%rv);
3306 =head2 save_module_acl(&acl, [user], [module])
3308 Updates the acl hash for some user and module. The parameters are :
3310 =item acl - Hash reference for the new access control options.
3312 =item user - User to update, defaulting to the current user.
3314 =item module - Module to update, defaulting to the caller.
3319 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3320 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3321 if (&foreign_check("acl")) {
3322 # Check if this user is a member of a group, and if he gets the
3323 # module from a group. If so, update its ACL as well
3324 &foreign_require("acl", "acl-lib.pl");
3326 foreach my $g (&acl::list_groups()) {
3327 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3328 &indexof($m, @{$g->{'modules'}}) >= 0) {
3334 &save_group_module_acl($_[0], $group->{'name'}, $m);
3337 if (!-d "$config_directory/$m") {
3338 mkdir("$config_directory/$m", 0755);
3340 &write_file("$config_directory/$m/$u.acl", $_[0]);
3343 =head2 save_group_module_acl(&acl, group, [module])
3345 Updates the acl hash for some group and module. The parameters are :
3347 =item acl - Hash reference for the new access control options.
3349 =item group - Group name to update.
3351 =item module - Module to update, defaulting to the caller.
3354 sub save_group_module_acl
3357 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3358 if (&foreign_check("acl")) {
3359 # Check if this group is a member of a group, and if it gets the
3360 # module from a group. If so, update the parent ACL as well
3361 &foreign_require("acl", "acl-lib.pl");
3363 foreach my $pg (&acl::list_groups()) {
3364 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3365 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3371 &save_group_module_acl($_[0], $group->{'name'}, $m);
3374 if (!-d "$config_directory/$m") {
3375 mkdir("$config_directory/$m", 0755);
3377 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3382 This function must be called by all Webmin CGI scripts, either directly or
3383 indirectly via a per-module lib.pl file. It performs a number of initialization
3384 and housekeeping tasks, such as working out the module name, checking that the
3385 current user has access to the module, and populating global variables. Some
3386 of the variables set include :
3388 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3390 =item $var_directory - Base logs directory, typically /var/webmin
3392 =item %config - Per-module configuration.
3394 =item %gconfig - Global configuration.
3396 =item $scriptname - Base name of the current perl script.
3398 =item $module_name - The name of the current module.
3400 =item $module_config_directory - The config directory for this module.
3402 =item $module_config_file - The config file for this module.
3404 =item $module_root_directory - This module's code directory.
3406 =item $webmin_logfile - The detailed logfile for webmin.
3408 =item $remote_user - The actual username used to login to webmin.
3410 =item $base_remote_user - The username whose permissions are in effect.
3412 =item $current_theme - The theme currently in use.
3414 =item $root_directory - The first root directory of this webmin install.
3416 =item @root_directories - All root directories for this webmin install.
3421 # Record first process ID that called this, so we know when it exited to clean
3423 $main::initial_process_id ||= $$;
3425 # Configuration and spool directories
3426 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3427 die "WEBMIN_CONFIG not set";
3429 $config_directory = $ENV{'WEBMIN_CONFIG'};
3430 if (!defined($ENV{'WEBMIN_VAR'})) {
3431 open(VARPATH, "$config_directory/var-path");
3432 chop($var_directory = <VARPATH>);
3436 $var_directory = $ENV{'WEBMIN_VAR'};
3438 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3439 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3441 if ($ENV{'SESSION_ID'}) {
3442 # Hide this variable from called programs, but keep it for internal use
3443 $main::session_id = $ENV{'SESSION_ID'};
3444 delete($ENV{'SESSION_ID'});
3446 if ($ENV{'REMOTE_PASS'}) {
3447 # Hide the password too
3448 $main::remote_pass = $ENV{'REMOTE_PASS'};
3449 delete($ENV{'REMOTE_PASS'});
3452 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3453 # Looks like we are running setuid, but the real UID hasn't been set.
3454 # Do so now, so that executed programs don't get confused
3459 # Read the webmin global config file. This contains the OS type and version,
3460 # OS specific configuration and global options such as proxy servers
3461 $config_file = "$config_directory/config";
3463 &read_file_cached($config_file, \%gconfig);
3464 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3465 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3467 # If debugging is enabled, open the debug log
3468 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3469 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3470 if ($gconfig{'debug_size'}) {
3471 my @st = stat($dlog);
3472 if ($st[7] > $gconfig{'debug_size'}) {
3473 rename($dlog, $dlog.".0");
3476 open(main::DEBUGLOG, ">>$dlog");
3477 $main::opened_debug_log = 1;
3479 if ($gconfig{'debug_what_start'}) {
3480 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3481 $main::debug_log_start_time = time();
3482 &webmin_debug_log("START", "script=$script_name");
3483 $main::debug_log_start_module = $module_name;
3487 # Set PATH and LD_LIBRARY_PATH
3488 if ($gconfig{'path'}) {
3489 if ($gconfig{'syspath'}) {
3491 $ENV{'PATH'} = $gconfig{'path'};
3495 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3498 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3500 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3501 if ($gconfig{'http_proxy'}) {
3502 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3504 if ($gconfig{'ftp_proxy'}) {
3505 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3507 if ($gconfig{'noproxy'}) {
3508 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3511 # Find all root directories
3513 if (&get_miniserv_config(\%miniserv)) {
3514 @root_directories = ( $miniserv{'root'} );
3515 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3516 push(@root_directories, $miniserv{"extraroot_$i"});
3520 # Work out which module we are in, and read the per-module config file
3521 $0 =~ s/\\/\//g; # Force consistent path on Windows
3522 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3523 # In a foreign call - use the module name given
3524 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3525 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3526 @root_directories = ( $root_directory ) if (!@root_directories);
3528 elsif ($ENV{'SCRIPT_NAME'}) {
3529 my $sn = $ENV{'SCRIPT_NAME'};
3530 $sn =~ s/^$gconfig{'webprefix'}//
3531 if (!$gconfig{'webprefixnoredir'});
3532 if ($sn =~ /^\/([^\/]+)\//) {
3533 # Get module name from CGI path
3536 if ($ENV{'SERVER_ROOT'}) {
3537 $root_directory = $ENV{'SERVER_ROOT'};
3539 elsif ($ENV{'SCRIPT_FILENAME'}) {
3540 $root_directory = $ENV{'SCRIPT_FILENAME'};
3541 $root_directory =~ s/$sn$//;
3543 @root_directories = ( $root_directory ) if (!@root_directories);
3546 # Get root directory from miniserv.conf, and deduce module name from $0
3547 $root_directory = $root_directories[0];
3549 foreach my $r (@root_directories) {
3550 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3551 # Under a module directory
3556 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3562 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3565 # Work out of this is a web, command line or cron job
3566 if (!$main::webmin_script_type) {
3567 if ($ENV{'SCRIPT_NAME'}) {
3569 $main::webmin_script_type = 'web';
3572 # Cron jobs have no TTY
3573 if ($gconfig{'os_type'} eq 'windows' ||
3574 open(DEVTTY, ">/dev/tty")) {
3575 $main::webmin_script_type = 'cmd';
3579 $main::webmin_script_type = 'cron';
3584 # Set the umask based on config
3585 if ($gconfig{'umask'} && !$main::umask_already++) {
3586 umask(oct($gconfig{'umask'}));
3589 # If this is a cron job or other background task, set the nice level
3590 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3592 if ($gconfig{'nice'}) {
3593 eval 'POSIX::nice($gconfig{\'nice\'});';
3596 # Set IO scheduling class and priority
3597 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3599 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3600 if ($gconfig{'sclass'} ne '');
3601 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3602 if ($gconfig{'sprio'} ne '');
3604 &execute_command("$cmd >/dev/null 2>&1");
3607 $main::nice_already++;
3610 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3611 $base_remote_user = $u;
3612 $remote_user = $ENV{'REMOTE_USER'};
3615 # Find and load the configuration file for this module
3616 my (@ruinfo, $rgroup);
3617 $module_config_directory = "$config_directory/$module_name";
3618 if (&get_product_name() eq "usermin" &&
3619 -r "$module_config_directory/config.$remote_user") {
3621 $module_config_file = "$module_config_directory/config.$remote_user";
3623 elsif (&get_product_name() eq "usermin" &&
3624 (@ruinfo = getpwnam($remote_user)) &&
3625 ($rgroup = getgrgid($ruinfo[3])) &&
3626 -r "$module_config_directory/config.\@$rgroup") {
3627 # Based on group name
3628 $module_config_file = "$module_config_directory/config.\@$rgroup";
3632 $module_config_file = "$module_config_directory/config";
3635 &read_file_cached($module_config_file, \%config);
3637 # Fix up windows-specific substitutions in values
3638 foreach my $k (keys %config) {
3639 if ($config{$k} =~ /\$\{systemroot\}/) {
3640 my $root = &get_windows_root();
3641 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3646 # Record the initial module
3647 $main::initial_module_name ||= $module_name;
3649 # Set some useful variables
3651 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3652 $gconfig{'mobile_theme'} :
3653 defined($gconfig{'theme_'.$remote_user}) ?
3654 $gconfig{'theme_'.$remote_user} :
3655 defined($gconfig{'theme_'.$base_remote_user}) ?
3656 $gconfig{'theme_'.$base_remote_user} :
3658 @current_themes = split(/\s+/, $current_themes);
3659 $current_theme = $current_themes[0];
3660 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3661 $theme_root_directory = $theme_root_directories[0];
3662 @theme_configs = ( );
3663 foreach my $troot (@theme_root_directories) {
3665 &read_file_cached("$troot/config", \%onetconfig);
3666 &read_file_cached("$troot/config", \%tconfig);
3667 push(@theme_configs, \%onetconfig);
3669 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3670 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3672 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3673 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3675 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3676 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3677 if ($tconfig{'preload_functions'}) {
3678 # Force load of theme functions right now, if requested
3679 &load_theme_library();
3681 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3682 # Load the theme's Webmin:: package classes
3683 do "$theme_root_directory/$tconfig{'oofunctions'}";
3688 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3689 : "$var_directory/webmin.log";
3691 # Load language strings into %text
3692 my @langs = &list_languages();
3694 if ($gconfig{'acceptlang'}) {
3695 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3696 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3698 $accepted_lang = $al->{'lang'};
3703 $current_lang = $force_lang ? $force_lang :
3704 $accepted_lang ? $accepted_lang :
3705 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3706 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3707 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3708 foreach my $l (@langs) {
3709 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3711 @lang_order_list = &unique($default_lang,
3712 split(/:/, $current_lang_info->{'fallback'}),
3714 %text = &load_language($module_name);
3715 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3717 # Get the %module_info for this module
3719 my ($mi) = grep { $_->{'dir'} eq $module_name }
3720 &get_all_module_infos(2);
3721 %module_info = %$mi;
3722 $module_root_directory = &module_root_directory($module_name);
3725 if ($module_name && !$main::no_acl_check &&
3726 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3727 # Check if the HTTP user can access this module
3728 if (!&foreign_available($module_name)) {
3729 if (!&foreign_check($module_name)) {
3730 &error(&text('emodulecheck',
3731 "<i>$module_info{'desc'}</i>"));
3734 &error(&text('emodule', "<i>$u</i>",
3735 "<i>$module_info{'desc'}</i>"));
3738 $main::no_acl_check++;
3741 # Check the Referer: header for nasty redirects
3742 my @referers = split(/\s+/, $gconfig{'referers'});
3744 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3747 my $http_host = $ENV{'HTTP_HOST'};
3748 $http_host =~ s/:\d+$//;
3749 my $unsafe_index = $unsafe_index_cgi ||
3750 &get_module_variable('$unsafe_index_cgi');
3752 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
3753 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3755 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3756 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3757 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3758 ($referer_site && $referer_site ne $http_host &&
3759 &indexof($referer_site, @referers) < 0 ||
3760 !$referer_site && $gconfig{'referers_none'}) &&
3761 !$trust_unknown_referers &&
3762 !&get_module_variable('$trust_unknown_referers')) {
3763 # Looks like a link from elsewhere .. show an error
3764 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3766 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3767 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3768 if ($referer_site) {
3770 print &text('referer_warn',
3771 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3773 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3774 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3777 # No referer info given
3778 print &text('referer_warn_unknown', $url),"<p>\n";
3779 print &text('referer_fix1u'),"<p>\n";
3780 print &text('referer_fix2u'),"<p>\n";
3784 &footer("/", $text{'index'});
3787 $main::no_referers_check++;
3788 $main::completed_referers_check++;
3790 # Call theme post-init
3791 if (defined(&theme_post_init_config)) {
3792 &theme_post_init_config(@_);
3795 # Record that we have done the calling library in this package
3796 my ($callpkg, $lib) = caller();
3798 $main::done_foreign_require{$callpkg,$lib} = 1;
3800 # If a licence checking is enabled, do it now
3801 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3802 &foreign_check($gconfig{'licence_module'}) &&
3803 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3804 my $oldpwd = &get_current_dir();
3805 $main::done_licence_module_check++;
3806 $main::licence_module = $gconfig{'licence_module'};
3807 &foreign_require($main::licence_module, "licence_check.pl");
3808 ($main::licence_status, $main::licence_message) =
3809 &foreign_call($main::licence_module, "check_licence");
3813 # Export global variables to caller
3814 if ($main::export_to_caller) {
3815 foreach my $v ('$config_file', '%gconfig', '$null_file',
3816 '$path_separator', '@root_directories',
3817 '$root_directory', '$module_name',
3818 '$base_remote_user', '$remote_user',
3819 '$module_config_directory', '$module_config_file',
3820 '%config', '@current_themes', '$current_theme',
3821 '@theme_root_directories', '$theme_root_directory',
3822 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3823 '$webmin_logfile', '$current_lang',
3824 '$current_lang_info', '@lang_order_list', '%text',
3825 '%module_info', '$module_root_directory') {
3826 my ($vt, $vn) = split('', $v, 2);
3827 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3834 =head2 load_language([module], [directory])
3836 Returns a hashtable mapping text codes to strings in the appropriate language,
3837 based on the $current_lang global variable, which is in turn set based on
3838 the Webmin user's selection. The optional module parameter tells the function
3839 which module to load strings for, and defaults to the calling module. The
3840 optional directory parameter can be used to load strings from a directory
3843 In regular module development you will never need to call this function
3844 directly, as init_config calls it for you, and places the module's strings
3845 into the %text hash.
3851 my $root = $root_directory;
3852 my $ol = $gconfig{'overlang'};
3853 my ($dir) = ($_[1] || "lang");
3855 # Read global lang files
3856 foreach my $o (@lang_order_list) {
3857 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3858 return () if (!$ok && $o eq $default_lang);
3861 foreach my $o (@lang_order_list) {
3862 &read_file_cached("$root/$ol/$o", \%text);
3865 &read_file_cached("$config_directory/custom-lang", \%text);
3868 # Read module's lang files
3869 my $mdir = &module_root_directory($_[0]);
3870 foreach my $o (@lang_order_list) {
3871 &read_file_cached("$mdir/$dir/$o", \%text);
3874 foreach $o (@lang_order_list) {
3875 &read_file_cached("$mdir/$ol/$o", \%text);
3878 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3880 foreach $k (keys %text) {
3881 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3884 if (defined(&theme_load_language)) {
3885 &theme_load_language(\%text, $_[0]);
3890 =head2 text_subs(string)
3892 Used internally by load_language to expand $code substitutions in language
3898 if (substr($_[0], 0, 8) eq "include:") {
3901 open(INCLUDE, substr($_[0], 8));
3909 my $t = $_[1]->{$_[0]};
3910 return defined($t) ? $t : '$'.$_[0];
3914 =head2 text(message, [substitute]+)
3916 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3917 the substitute parameters. This makes it easy to use strings with placeholders
3918 that get replaced with programmatically generated text. For example :
3920 print &text('index_hello', $remote_user),"<p>\n";
3925 my $t = &get_module_variable('%text', 1);
3926 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3927 for(my $i=1; $i<@_; $i++) {
3928 $rv =~ s/\$$i/$_[$i]/g;
3933 =head2 encode_base64(string)
3935 Encodes a string into base64 format, for use in MIME email or HTTP
3936 authorization headers.
3942 pos($_[0]) = 0; # ensure start at the beginning
3943 while ($_[0] =~ /(.{1,57})/gs) {
3944 $res .= substr(pack('u57', $1), 1)."\n";
3947 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3948 my $padding = (3 - length($_[0]) % 3) % 3;
3949 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3953 =head2 decode_base64(string)
3955 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3962 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3963 if (length($str) % 4) {
3966 $str =~ s/=+$//; # remove padding
3967 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3968 while ($str =~ /(.{1,60})/gs) {
3969 my $len = chr(32 + length($1)*3/4); # compute length byte
3970 $res .= unpack("u", $len . $1 ); # uudecode
3975 =head2 get_module_info(module, [noclone], [forcache])
3977 Returns a hash containg details of the given module. Some useful keys are :
3979 =item dir - The module directory, like sendmail.
3981 =item desc - Human-readable description, in the current users' language.
3983 =item version - Optional module version number.
3985 =item os_support - List of supported operating systems and versions.
3987 =item category - Category on Webmin's left menu, like net.
3992 return () if ($_[0] =~ /^\./);
3993 my (%rv, $clone, $o);
3994 my $mdir = &module_root_directory($_[0]);
3995 &read_file_cached("$mdir/module.info", \%rv) || return ();
3997 foreach $o (@lang_order_list) {
3998 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
3999 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4001 if ($clone && !$_[1] && $config_directory) {
4002 $rv{'clone'} = $rv{'desc'};
4003 &read_file("$config_directory/$_[0]/clone", \%rv);
4006 my %module_categories;
4007 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4008 my $pn = &get_product_name();
4009 if (defined($rv{'category_'.$pn})) {
4010 # Can override category for webmin/usermin
4011 $rv{'category'} = $rv{'category_'.$pn};
4013 $rv{'realcategory'} = $rv{'category'};
4014 $rv{'category'} = $module_categories{$_[0]}
4015 if (defined($module_categories{$_[0]}));
4017 # Apply description overrides
4018 $rv{'realdesc'} = $rv{'desc'};
4020 &read_file_cached("$config_directory/webmin.descs", \%descs);
4021 if ($descs{$_[0]." ".$current_lang}) {
4022 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4024 elsif ($descs{$_[0]}) {
4025 $rv{'desc'} = $descs{$_[0]};
4029 # Apply per-user description overridde
4030 my %gaccess = &get_module_acl(undef, "");
4031 if ($gaccess{'desc_'.$_[0]}) {
4032 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4036 if ($rv{'longdesc'}) {
4037 # All standard modules have an index.cgi
4038 $rv{'index_link'} = 'index.cgi';
4041 # Call theme-specific override function
4042 if (defined(&theme_get_module_info)) {
4043 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4049 =head2 get_all_module_infos(cachemode)
4051 Returns a list contains the information on all modules in this webmin
4052 install, including clones. Uses caching to reduce the number of module.info
4053 files that need to be read. Each element of the array is a hash reference
4054 in the same format as returned by get_module_info. The cache mode flag can be :
4055 0 = read and write, 1 = don't read or write, 2 = read only
4058 sub get_all_module_infos
4062 # Is the cache out of date? (ie. have any of the root's changed?)
4063 my $cache_file = "$config_directory/module.infos.cache";
4065 if (&read_file_cached($cache_file, \%cache)) {
4066 foreach my $r (@root_directories) {
4068 if ($st[9] != $cache{'mtime_'.$r}) {
4078 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4079 # Can use existing module.info cache
4081 foreach my $k (keys %cache) {
4082 if ($k =~ /^(\S+) (\S+)$/) {
4083 $mods{$1}->{$2} = $cache{$k};
4086 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4089 # Need to rebuild cache
4091 foreach my $r (@root_directories) {
4093 foreach my $m (readdir(DIR)) {
4094 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4095 my %minfo = &get_module_info($m, 0, 1);
4096 next if (!%minfo || !$minfo{'dir'});
4098 foreach $k (keys %minfo) {
4099 $cache{"${m} ${k}"} = $minfo{$k};
4104 $cache{'mtime_'.$r} = $st[9];
4106 $cache{'lang'} = $current_lang;
4107 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4110 # Override descriptions for modules for current user
4111 my %gaccess = &get_module_acl(undef, "");
4112 foreach my $m (@rv) {
4113 if ($gaccess{"desc_".$m->{'dir'}}) {
4114 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4118 # Apply installed flags
4120 &read_file_cached("$config_directory/installed.cache", \%installed);
4121 foreach my $m (@rv) {
4122 $m->{'installed'} = $installed{$m->{'dir'}};
4128 =head2 get_theme_info(theme)
4130 Returns a hash containing a theme's details, taken from it's theme.info file.
4131 Some useful keys are :
4133 =item dir - The theme directory, like blue-theme.
4135 =item desc - Human-readable description, in the current users' language.
4137 =item version - Optional module version number.
4139 =item os_support - List of supported operating systems and versions.
4144 return () if ($_[0] =~ /^\./);
4146 my $tdir = &module_root_directory($_[0]);
4147 &read_file("$tdir/theme.info", \%rv) || return ();
4148 foreach my $o (@lang_order_list) {
4149 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4155 =head2 list_languages
4157 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4158 Each is a hash reference with the following keys :
4160 =item lang - The short language code, like es for Spanish.
4162 =item desc - A human-readable description, in English.
4164 =item charset - An optional character set to use when displaying the language.
4166 =item titles - Set to 1 only if Webmin has title images for the language.
4168 =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.
4173 if (!@main::list_languages_cache) {
4176 open(LANG, "$root_directory/lang_list.txt");
4178 if (/^(\S+)\s+(.*)/) {
4179 my $l = { 'desc' => $2 };
4180 foreach $o (split(/,/, $1)) {
4181 if ($o =~ /^([^=]+)=(.*)$/) {
4185 $l->{'index'} = scalar(@rv);
4186 push(@main::list_languages_cache, $l);
4190 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4191 @main::list_languages_cache;
4193 return @main::list_languages_cache;
4196 =head2 read_env_file(file, &hash)
4198 Similar to Webmin's read_file function, but handles files containing shell
4199 environment variables formatted like :
4204 The file parameter is the full path to the file to read, and hash a Perl hash
4205 ref to read names and values into.
4211 &open_readfile(FILE, $_[0]) || return 0;
4214 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4215 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4216 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4224 =head2 write_env_file(file, &hash, [export])
4226 Writes out a hash to a file in name='value' format, suitable for use in a shell
4227 script. The parameters are :
4229 =item file - Full path for a file to write to
4231 =item hash - Hash reference of names and values to write.
4233 =item export - If set to 1, preceed each variable setting with the word 'export'.
4238 my $exp = $_[2] ? "export " : "";
4239 &open_tempfile(FILE, ">$_[0]");
4240 foreach my $k (keys %{$_[1]}) {
4241 my $v = $_[1]->{$k};
4242 if ($v =~ /^\S+$/) {
4243 &print_tempfile(FILE, "$exp$k=$v\n");
4246 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4249 &close_tempfile(FILE);
4252 =head2 lock_file(filename, [readonly], [forcefile])
4254 Lock a file for exclusive access. If the file is already locked, spin
4255 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4256 to work OK. The parameters are :
4258 =item filename - File or directory to lock.
4260 =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.
4262 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4267 my $realfile = &translate_filename($_[0]);
4268 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4269 my $no_lock = !&can_lock_file($realfile);
4270 my $lock_tries_count = 0;
4273 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4278 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4281 # Create the .lock file
4282 open(LOCKING, ">$realfile.lock") || return 0;
4283 my $lck = eval "flock(LOCKING, 2+4)";
4285 # Lock of lock file failed! Wait till later
4288 print LOCKING $$,"\n";
4289 eval "flock(LOCKING, 8)";
4292 $main::locked_file_list{$realfile} = int($_[1]);
4293 push(@main::temporary_files, "$realfile.lock");
4294 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4295 !&get_module_variable('$no_log_file_changes') &&
4297 # Grab a copy of this file for later diffing
4299 $main::locked_file_data{$realfile} = undef;
4301 $main::locked_file_type{$realfile} = 1;
4302 $main::locked_file_data{$realfile} = '';
4304 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4305 $main::locked_file_type{$realfile} = 2;
4306 $main::locked_file_data{$realfile} = $lnk;
4308 elsif (open(ORIGFILE, $realfile)) {
4309 $main::locked_file_type{$realfile} = 0;
4310 $main::locked_file_data{$realfile} = '';
4313 $main::locked_file_data{$realfile} .=$_;
4322 if ($lock_tries_count++ > 5*60) {
4323 # Give up after 5 minutes
4324 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4330 =head2 unlock_file(filename)
4332 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4333 file changes is enabled, then at unlock file a diff will be taken between the
4334 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4335 called. This can then be viewed in the Webmin Actions Log module.
4340 my $realfile = &translate_filename($_[0]);
4341 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4342 unlink("$realfile.lock") if (&can_lock_file($realfile));
4343 delete($main::locked_file_list{$realfile});
4344 if (exists($main::locked_file_data{$realfile})) {
4345 # Diff the new file with the old
4347 my $lnk = readlink($realfile);
4348 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4349 my $oldtype = $main::locked_file_type{$realfile};
4350 my $new = !defined($main::locked_file_data{$realfile});
4351 if ($new && !-e _) {
4352 # file doesn't exist, and never did! do nothing ..
4354 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4355 # is (or was) a directory ..
4356 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4357 push(@main::locked_file_diff,
4358 { 'type' => 'mkdir', 'object' => $realfile });
4360 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4361 push(@main::locked_file_diff,
4362 { 'type' => 'rmdir', 'object' => $realfile });
4365 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4366 # is (or was) a symlink ..
4367 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4368 push(@main::locked_file_diff,
4369 { 'type' => 'symlink', 'object' => $realfile,
4372 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4373 push(@main::locked_file_diff,
4374 { 'type' => 'unsymlink', 'object' => $realfile,
4375 'data' => $main::locked_file_data{$realfile} });
4377 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4378 push(@main::locked_file_diff,
4379 { 'type' => 'resymlink', 'object' => $realfile,
4384 # is a file, or has changed type?!
4385 my ($diff, $delete_file);
4386 my $type = "modify";
4388 open(NEWFILE, ">$realfile");
4393 if (!defined($main::locked_file_data{$realfile})) {
4396 open(ORIGFILE, ">$realfile.webminorig");
4397 print ORIGFILE $main::locked_file_data{$realfile};
4399 $diff = &backquote_command(
4400 "diff ".quotemeta("$realfile.webminorig")." ".
4401 quotemeta($realfile)." 2>/dev/null");
4402 push(@main::locked_file_diff,
4403 { 'type' => $type, 'object' => $realfile,
4404 'data' => $diff } ) if ($diff);
4405 unlink("$realfile.webminorig");
4406 unlink($realfile) if ($delete_file);
4409 if ($gconfig{'logfullfiles'}) {
4410 # Add file details to list of those to fully log
4411 $main::orig_file_data{$realfile} ||=
4412 $main::locked_file_data{$realfile};
4413 $main::orig_file_type{$realfile} ||=
4414 $main::locked_file_type{$realfile};
4417 delete($main::locked_file_data{$realfile});
4418 delete($main::locked_file_type{$realfile});
4422 =head2 test_lock(file)
4424 Returns 1 if some file is currently locked, 0 if not.
4429 my $realfile = &translate_filename($_[0]);
4430 return 0 if (!$_[0]);
4431 return 1 if (defined($main::locked_file_list{$realfile}));
4432 return 0 if (!&can_lock_file($realfile));
4434 if (open(LOCKING, "$realfile.lock")) {
4439 return $pid && kill(0, $pid);
4442 =head2 unlock_all_files
4444 Unlocks all files locked by the current script.
4447 sub unlock_all_files
4449 foreach $f (keys %main::locked_file_list) {
4454 =head2 can_lock_file(file)
4456 Returns 1 if some file should be locked, based on the settings in the
4457 Webmin Configuration module. For internal use by lock_file only.
4462 if (&is_readonly_mode()) {
4463 return 0; # never lock in read-only mode
4465 elsif ($gconfig{'lockmode'} == 0) {
4468 elsif ($gconfig{'lockmode'} == 1) {
4472 # Check if under any of the directories
4474 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4475 if (&same_file($d, $_[0]) ||
4476 &is_under_directory($d, $_[0])) {
4480 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4484 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4486 Log some action taken by a user. This is typically called at the end of a
4487 script, once all file changes are complete and all commands run. The
4490 =item action - A short code for the action being performed, like 'create'.
4492 =item type - A code for the type of object the action is performed to, like 'user'.
4494 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4496 =item params - A hash ref of additional information about the action.
4498 =item module - Name of the module in which the action was performed, which defaults to the current module.
4500 =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.
4502 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4504 =item client-ip - IP address of the browser that performed the action.
4509 return if (!$gconfig{'log'} || &is_readonly_mode());
4510 my $m = $_[4] ? $_[4] : &get_module_name();
4512 if ($gconfig{'logclear'}) {
4513 # check if it is time to clear the log
4514 my @st = stat("$webmin_logfile.time");
4515 my $write_logtime = 0;
4517 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4518 # clear logfile and all diff files
4519 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4520 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4521 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4522 unlink($webmin_logfile);
4529 if ($write_logtime) {
4530 open(LOGTIME, ">$webmin_logfile.time");
4531 print LOGTIME time(),"\n";
4536 # If an action script directory is defined, call the appropriate scripts
4537 if ($gconfig{'action_script_dir'}) {
4538 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4539 my ($basedir) = $gconfig{'action_script_dir'};
4541 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4544 opendir(DIR, $dir) or die "Can't open $dir: $!";
4545 while (defined($file = readdir(DIR))) {
4546 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4547 if (-x "$dir/$file") {
4548 # Call a script notifying it of the action
4550 $ENV{'ACTION_MODULE'} = &get_module_name();
4551 $ENV{'ACTION_ACTION'} = $_[0];
4552 $ENV{'ACTION_TYPE'} = $_[1];
4553 $ENV{'ACTION_OBJECT'} = $_[2];
4554 $ENV{'ACTION_SCRIPT'} = $script_name;
4555 foreach my $p (keys %param) {
4556 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4558 system("$dir/$file", @_,
4559 "<$null_file", ">$null_file", "2>&1");
4567 # should logging be done at all?
4568 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4569 split(/\s+/, $gconfig{'logusers'})) < 0);
4570 return if ($gconfig{'logmodules'} && &indexof($m,
4571 split(/\s+/, $gconfig{'logmodules'})) < 0);
4575 my @tm = localtime($now);
4576 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4577 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4578 $main::action_id_count++;
4579 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4580 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4581 $tm[2], $tm[1], $tm[0],
4582 $remote_user || '-',
4583 $main::session_id || '-',
4584 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4585 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4586 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4588 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4589 my $v = $_[3]->{$k};
4595 elsif (ref($v) eq 'ARRAY') {
4599 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4600 $line .= " $k='$vv'";
4604 foreach $vv (split(/\0/, $v)) {
4606 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4607 $line .= " $k='$vv'";
4610 $param{$k} = join(" ", @pv);
4612 open(WEBMINLOG, ">>$webmin_logfile");
4613 print WEBMINLOG $line,"\n";
4615 if ($gconfig{'logperms'}) {
4616 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4619 chmod(0600, $webmin_logfile);
4622 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4623 # Find and record the changes made to any locked files, or commands run
4625 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4626 foreach my $d (@main::locked_file_diff) {
4627 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4628 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4629 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4630 print DIFFLOG $d->{'data'};
4632 if ($d->{'input'}) {
4633 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4634 print DIFFLOG $d->{'input'};
4637 if ($gconfig{'logperms'}) {
4638 chmod(oct($gconfig{'logperms'}),
4639 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4640 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4644 @main::locked_file_diff = undef;
4646 if ($gconfig{'logfullfiles'}) {
4647 # Save the original contents of any modified files
4649 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4650 foreach my $f (keys %main::orig_file_data) {
4651 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4652 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4653 if (!defined($main::orig_file_type{$f})) {
4654 print ORIGLOG -1," ",$f,"\n";
4657 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4659 print ORIGLOG $main::orig_file_data{$f};
4661 if ($gconfig{'logperms'}) {
4662 chmod(oct($gconfig{'logperms'}),
4663 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4667 %main::orig_file_data = undef;
4668 %main::orig_file_type = undef;
4672 if ($gconfig{'logsyslog'}) {
4673 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4674 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4675 setlogsock("inet");';
4677 # Syslog module is installed .. try to convert to a
4678 # human-readable form
4680 my $mod = &get_module_name();
4681 my $mdir = module_root_directory($mod);
4682 if (-r "$mdir/log_parser.pl") {
4683 &foreign_require($mod, "log_parser.pl");
4685 foreach my $k (keys %{$_[3]}) {
4686 my $v = $_[3]->{$k};
4687 if (ref($v) eq 'ARRAY') {
4688 $params{$k} = join("\0", @$v);
4694 $msg = &foreign_call($mod, "parse_webmin_log",
4695 $remote_user, $script_name,
4696 $_[0], $_[1], $_[2], \%params);
4697 $msg =~ s/<[^>]*>//g; # Remove tags
4699 elsif ($_[0] eq "_config_") {
4700 my %wtext = &load_language("webminlog");
4701 $msg = $wtext{'search_config'};
4703 $msg ||= "$_[0] $_[1] $_[2]";
4704 my %info = &get_module_info($m);
4705 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4710 =head2 additional_log(type, object, data, [input])
4712 Records additional log data for an upcoming call to webmin_log, such
4713 as a command that was run or SQL that was executed. Typically you will never
4714 need to call this function directory.
4719 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4720 push(@main::locked_file_diff,
4721 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4722 'input' => $_[3] } );
4726 =head2 webmin_debug_log(type, message)
4728 Write something to the Webmin debug log. For internal use only.
4731 sub webmin_debug_log
4733 my ($type, $msg) = @_;
4734 return 0 if (!$main::opened_debug_log);
4735 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4736 if ($gconfig{'debug_modules'}) {
4737 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
4738 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
4741 my @tm = localtime($now);
4743 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4744 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4745 $tm[2], $tm[1], $tm[0],
4746 $remote_user || "-",
4747 $ENV{'REMOTE_HOST'} || "-",
4748 &get_module_name() || "-",
4751 seek(main::DEBUGLOG, 0, 2);
4752 print main::DEBUGLOG $line."\n";
4756 =head2 system_logged(command)
4758 Just calls the Perl system() function, but also logs the command run.
4763 if (&is_readonly_mode()) {
4764 print STDERR "Vetoing command $_[0]\n";
4767 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4768 my $cmd = join(" ", @realcmd);
4770 if ($cmd =~ s/(\s*&\s*)$//) {
4773 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4774 $cmd =~ s/^\((.*)\)\s*$/$1/;
4776 &additional_log('exec', undef, $cmd);
4777 return system(@realcmd);
4780 =head2 backquote_logged(command)
4782 Executes a command and returns the output (like `command`), but also logs it.
4785 sub backquote_logged
4787 if (&is_readonly_mode()) {
4789 print STDERR "Vetoing command $_[0]\n";
4792 my $realcmd = &translate_command($_[0]);
4795 if ($cmd =~ s/(\s*&\s*)$//) {
4798 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4799 $cmd =~ s/^\((.*)\)\s*$/$1/;
4801 &additional_log('exec', undef, $cmd);
4802 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4806 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4808 Runs some command, waiting at most the given number of seconds for it to
4809 complete, and returns the output. The maxlines parameter sets the number
4810 of lines of output to capture. The safe parameter should be set to 1 if the
4811 command is safe for read-only mode users to run.
4814 sub backquote_with_timeout
4816 my $realcmd = &translate_command($_[0]);
4817 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4818 if ($gconfig{'debug_what_cmd'});
4820 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4825 my $elapsed = time() - $start;
4826 last if ($elapsed > $_[1]);
4828 vec($rmask, fileno(OUT), 1) = 1;
4829 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4830 last if (!$sel || $sel < 0);
4832 last if (!defined($line));
4835 if ($_[3] && $linecount >= $_[3]) {
4840 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4844 return wantarray ? ($out, $timed_out) : $out;
4847 =head2 backquote_command(command, safe?)
4849 Executes a command and returns the output (like `command`), subject to
4850 command translation. The safe parameter should be set to 1 if the command
4851 is safe for read-only mode users to run.
4854 sub backquote_command
4856 if (&is_readonly_mode() && !$_[1]) {
4857 print STDERR "Vetoing command $_[0]\n";
4861 my $realcmd = &translate_command($_[0]);
4862 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4866 =head2 kill_logged(signal, pid, ...)
4868 Like Perl's built-in kill function, but also logs the fact that some process
4869 was killed. On Windows, falls back to calling process.exe to terminate a
4875 return scalar(@_)-1 if (&is_readonly_mode());
4876 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4877 if ($gconfig{'debug_what_procs'});
4878 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4879 if ($gconfig{'os_type'} eq 'windows') {
4880 # Emulate some kills with process.exe
4881 my $arg = $_[0] eq "KILL" ? "-k" :
4882 $_[0] eq "TERM" ? "-q" :
4883 $_[0] eq "STOP" ? "-s" :
4884 $_[0] eq "CONT" ? "-r" : undef;
4886 foreach my $p (@_[1..@_-1]) {
4888 $ok ||= kill($_[0], $p);
4891 &execute_command("process $arg $p");
4903 =head2 rename_logged(old, new)
4905 Re-names a file and logs the rename. If the old and new files are on different
4906 filesystems, calls mv or the Windows rename function to do the job.
4911 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4912 return &rename_file($_[0], $_[1]);
4915 =head2 rename_file(old, new)
4917 Renames a file or directory. If the old and new files are on different
4918 filesystems, calls mv or the Windows rename function to do the job.
4923 if (&is_readonly_mode()) {
4924 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4927 my $src = &translate_filename($_[0]);
4928 my $dst = &translate_filename($_[1]);
4929 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4930 if ($gconfig{'debug_what_ops'});
4931 my $ok = rename($src, $dst);
4932 if (!$ok && $! !~ /permission/i) {
4933 # Try the mv command, in case this is a cross-filesystem rename
4934 if ($gconfig{'os_type'} eq 'windows') {
4935 # Need to use rename
4936 my $out = &backquote_command("rename ".quotemeta($_[0]).
4937 " ".quotemeta($_[1])." 2>&1");
4939 $! = $out if (!$ok);
4943 my $out = &backquote_command("mv ".quotemeta($_[0]).
4944 " ".quotemeta($_[1])." 2>&1");
4946 $! = $out if (!$ok);
4952 =head2 symlink_logged(src, dest)
4954 Create a symlink, and logs it. Effectively does the same thing as the Perl
4961 my $rv = &symlink_file($_[0], $_[1]);
4962 &unlock_file($_[1]);
4966 =head2 symlink_file(src, dest)
4968 Creates a soft link, unless in read-only mode. Effectively does the same thing
4969 as the Perl symlink function.
4974 if (&is_readonly_mode()) {
4975 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4978 my $src = &translate_filename($_[0]);
4979 my $dst = &translate_filename($_[1]);
4980 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
4981 if ($gconfig{'debug_what_ops'});
4982 return symlink($src, $dst);
4985 =head2 link_file(src, dest)
4987 Creates a hard link, unless in read-only mode. The existing new link file
4988 will be deleted if necessary. Effectively the same as Perl's link function.
4993 if (&is_readonly_mode()) {
4994 print STDERR "Vetoing link from $_[0] to $_[1]\n";
4997 my $src = &translate_filename($_[0]);
4998 my $dst = &translate_filename($_[1]);
4999 &webmin_debug_log('LINK', "src=$src dst=$dst")
5000 if ($gconfig{'debug_what_ops'});
5001 unlink($dst); # make sure link works
5002 return link($src, $dst);
5005 =head2 make_dir(dir, perms, recursive)
5007 Creates a directory and sets permissions on it, unless in read-only mode.
5008 The perms parameter sets the octal permissions to apply, which unlike Perl's
5009 mkdir will really get set. The recursive flag can be set to 1 to have the
5010 function create parent directories too.
5015 my ($dir, $perms, $recur) = @_;
5016 if (&is_readonly_mode()) {
5017 print STDERR "Vetoing directory $dir\n";
5020 $dir = &translate_filename($dir);
5021 my $exists = -d $dir ? 1 : 0;
5022 return 1 if ($exists && $recur); # already exists
5023 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5024 my $rv = mkdir($dir, $perms);
5025 if (!$rv && $recur) {
5026 # Failed .. try mkdir -p
5027 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5028 my $ex = &execute_command("mkdir $param "."e_path($dir));
5034 chmod($perms, $dir);
5039 =head2 set_ownership_permissions(user, group, perms, file, ...)
5041 Sets the user, group owner and permissions on some files. The parameters are :
5043 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5045 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5047 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5049 =item file - One or more files or directories to modify.
5052 sub set_ownership_permissions
5054 my ($user, $group, $perms, @files) = @_;
5055 if (&is_readonly_mode()) {
5056 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5059 @files = map { &translate_filename($_) } @files;
5060 if ($gconfig{'debug_what_ops'}) {
5061 foreach my $f (@files) {
5062 &webmin_debug_log('PERMS',
5063 "file=$f user=$user group=$group perms=$perms");
5067 if (defined($user)) {
5068 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5070 if (defined($group)) {
5071 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5074 my @uinfo = getpwuid($uid);
5077 $rv = chown($uid, $gid, @files);
5079 if ($rv && defined($perms)) {
5080 $rv = chmod($perms, @files);
5085 =head2 unlink_logged(file, ...)
5087 Like Perl's unlink function, but locks the files beforehand and un-locks them
5088 after so that the deletion is logged by Webmin.
5094 foreach my $f (@_) {
5095 if (!&test_lock($f)) {
5100 my @rv = &unlink_file(@_);
5101 foreach my $f (@_) {
5106 return wantarray ? @rv : $rv[0];
5109 =head2 unlink_file(file, ...)
5111 Deletes some files or directories. Like Perl's unlink function, but also
5112 recursively deletes directories with the rm command if needed.
5117 return 1 if (&is_readonly_mode());
5120 foreach my $f (@_) {
5121 my $realf = &translate_filename($f);
5122 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5124 if (!rmdir($realf)) {
5126 if ($gconfig{'os_type'} eq 'windows') {
5127 # Call del and rmdir commands
5130 my $out = `del /q "$qm" 2>&1`;
5132 $out = `rmdir "$qm" 2>&1`;
5137 my $qm = quotemeta($realf);
5138 $out = `rm -rf $qm 2>&1`;
5147 if (!unlink($realf)) {
5153 return wantarray ? ($rv, $err) : $rv;
5156 =head2 copy_source_dest(source, dest)
5158 Copy some file or directory to a new location. Returns 1 on success, or 0
5159 on failure - also sets $! on failure. If the source is a directory, uses
5160 piped tar commands to copy a whole directory structure including permissions
5164 sub copy_source_dest
5166 return (1, undef) if (&is_readonly_mode());
5167 my ($src, $dst) = @_;
5170 &webmin_debug_log('COPY', "src=$src dst=$dst")
5171 if ($gconfig{'debug_what_ops'});
5172 if ($gconfig{'os_type'} eq 'windows') {
5173 # No tar or cp on windows, so need to use copy command
5177 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5180 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5188 # A directory .. need to copy with tar command
5189 my @st = stat($src);
5192 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5193 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5200 # Can just copy with cp
5201 my $out = &backquote_logged("cp -p ".quotemeta($src).
5202 " ".quotemeta($dst)." 2>&1");
5208 return wantarray ? ($ok, $err) : $ok;
5211 =head2 remote_session_name(host|&server)
5213 Generates a session ID for some server. For this server, this will always
5214 be an empty string. For a server object it will include the hostname and
5215 port and PID. For a server name, it will include the hostname and PID. For
5219 sub remote_session_name
5221 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5222 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5223 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5224 ref($_[0]) ? "" : "$_[0].$$";
5227 =head2 remote_foreign_require(server, module, file)
5229 Connects to rpc.cgi on a remote webmin server and have it open a session
5230 to a process that will actually do the require and run functions. This is the
5231 equivalent for foreign_require, but for a remote Webmin system. The server
5232 parameter can either be a hostname of a system registered in the Webmin
5233 Servers Index module, or a hash reference for a system from that module.
5236 sub remote_foreign_require
5238 my $call = { 'action' => 'require',
5241 my $sn = &remote_session_name($_[0]);
5242 if ($remote_session{$sn}) {
5243 $call->{'session'} = $remote_session{$sn};
5246 $call->{'newsession'} = 1;
5248 my $rv = &remote_rpc_call($_[0], $call);
5249 if ($rv->{'session'}) {
5250 $remote_session{$sn} = $rv->{'session'};
5251 $remote_session_server{$sn} = $_[0];
5255 =head2 remote_foreign_call(server, module, function, [arg]*)
5257 Call a function on a remote server. Must have been setup first with
5258 remote_foreign_require for the same server and module. Equivalent to
5259 foreign_call, but with the extra server parameter to specify the remote
5263 sub remote_foreign_call
5265 return undef if (&is_readonly_mode());
5266 my $sn = &remote_session_name($_[0]);
5267 return &remote_rpc_call($_[0], { 'action' => 'call',
5270 'session' => $remote_session{$sn},
5271 'args' => [ @_[3 .. $#_] ] } );
5274 =head2 remote_foreign_check(server, module, [api-only])
5276 Checks if some module is installed and supported on a remote server. Equivilant
5277 to foreign_check, but for the remote Webmin system specified by the server
5281 sub remote_foreign_check
5283 return &remote_rpc_call($_[0], { 'action' => 'check',
5288 =head2 remote_foreign_config(server, module)
5290 Gets the configuration for some module from a remote server, as a hash.
5291 Equivalent to foreign_config, but for a remote system.
5294 sub remote_foreign_config
5296 return &remote_rpc_call($_[0], { 'action' => 'config',
5297 'module' => $_[1] });
5300 =head2 remote_eval(server, module, code)
5302 Evaluates some perl code in the context of a module on a remote webmin server.
5303 The server parameter must be the hostname of a remote system, module must
5304 be a module directory name, and code a string of Perl code to run. This can
5305 only be called after remote_foreign_require for the same server and module.
5310 return undef if (&is_readonly_mode());
5311 my $sn = &remote_session_name($_[0]);
5312 return &remote_rpc_call($_[0], { 'action' => 'eval',
5315 'session' => $remote_session{$sn} });
5318 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5320 Transfers some local file to another server via Webmin's RPC protocol, and
5321 returns the resulting remote filename. If the remotefile parameter is given,
5322 that is the destination filename which will be used. Otherwise a randomly
5323 selected temporary filename will be used, and returned by the function.
5328 return undef if (&is_readonly_mode());
5330 my $sn = &remote_session_name($_[0]);
5331 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5332 # Copy data over TCP connection
5333 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5335 'name' => $_[3] } );
5337 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5338 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5339 return &$main::remote_error_handler("Failed to transfer file : $error")
5342 while(read(FILE, $got, 1024) > 0) {
5346 shutdown(TWRITE, 1);
5348 if ($error && $error !~ /^OK/) {
5349 # Got back an error!
5350 return &$main::remote_error_handler("Failed to transfer file : $error");
5356 # Just pass file contents as parameters
5358 while(read(FILE, $got, 1024) > 0) {
5362 return &remote_rpc_call($_[0], { 'action' => 'write',
5365 'session' => $remote_session{$sn} });
5369 =head2 remote_read(server, localfile, remotefile)
5371 Transfers a file from a remote server to this system, using Webmin's RPC
5372 protocol. The server parameter must be the hostname of a system registered
5373 in the Webmin Servers Index module, localfile is the destination path on this
5374 system, and remotefile is the file to fetch from the remote server.
5379 my $sn = &remote_session_name($_[0]);
5380 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5381 # Copy data over TCP connection
5382 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5383 'file' => $_[2] } );
5385 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5388 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5389 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5390 return &$main::remote_error_handler("Failed to transfer file : $error")
5393 open(FILE, ">$_[1]");
5394 while(read(TREAD, $got, 1024) > 0) {
5401 # Just get data as return value
5402 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5404 'session' => $remote_session{$sn} });
5405 open(FILE, ">$_[1]");
5411 =head2 remote_finished
5413 Close all remote sessions. This happens automatically after a while
5414 anyway, but this function should be called to clean things up faster.
5419 foreach my $sn (keys %remote_session) {
5420 my $server = $remote_session_server{$sn};
5421 &remote_rpc_call($server, { 'action' => 'quit',
5422 'session' => $remote_session{$sn} } );
5423 delete($remote_session{$sn});
5424 delete($remote_session_server{$sn});
5426 foreach $fh (keys %fast_fh_cache) {
5428 delete($fast_fh_cache{$fh});
5432 =head2 remote_error_setup(&function)
5434 Sets a function to be called instead of &error when a remote RPC operation
5435 fails. Useful if you want to have more control over your remote operations.
5438 sub remote_error_setup
5440 $main::remote_error_handler = $_[0] || \&error;
5443 =head2 remote_rpc_call(server, structure)
5445 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5446 and then reads back a reply structure. This is mainly for internal use only,
5447 and is called by the other remote_* functions.
5453 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5455 # Server structure was given
5457 $serv->{'user'} || $serv->{'id'} == 0 ||
5458 return &$main::remote_error_handler(
5459 "No Webmin login set for server");
5462 # lookup the server in the webmin servers module if needed
5463 if (!defined(%main::remote_servers_cache)) {
5464 &foreign_require("servers", "servers-lib.pl");
5465 foreach $s (&foreign_call("servers", "list_servers")) {
5466 $main::remote_servers_cache{$s->{'host'}} = $s;
5467 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5470 $serv = $main::remote_servers_cache{$_[0]};
5471 $serv || return &$main::remote_error_handler(
5472 "No Webmin Servers entry for $_[0]");
5473 $serv->{'user'} || return &$main::remote_error_handler(
5474 "No login set for server $_[0]");
5476 my $ip = $serv->{'ip'} || $serv->{'host'};
5478 # Work out the username and password
5480 if ($serv->{'sameuser'}) {
5481 $user = $remote_user;
5482 defined($main::remote_pass) || return &$main::remote_error_handler(
5483 "Password for this server is not available");
5484 $pass = $main::remote_pass;
5487 $user = $serv->{'user'};
5488 $pass = $serv->{'pass'};
5491 if ($serv->{'fast'} || !$sn) {
5492 # Make TCP connection call to fastrpc.cgi
5493 if (!$fast_fh_cache{$sn} && $sn) {
5494 # Need to open the connection
5495 my $con = &make_http_connection(
5496 $ip, $serv->{'port'}, $serv->{'ssl'},
5497 "POST", "/fastrpc.cgi");
5498 return &$main::remote_error_handler(
5499 "Failed to connect to $serv->{'host'} : $con")
5501 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5502 &write_http_connection($con, "User-agent: Webmin\r\n");
5503 my $auth = &encode_base64("$user:$pass");
5505 &write_http_connection($con, "Authorization: basic $auth\r\n");
5506 &write_http_connection($con, "Content-length: ",
5507 length($tostr),"\r\n");
5508 &write_http_connection($con, "\r\n");
5509 &write_http_connection($con, $tostr);
5511 # read back the response
5512 my $line = &read_http_connection($con);
5513 $line =~ tr/\r\n//d;
5514 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5515 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5517 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5518 return &$main::remote_error_handler("HTTP error : $line");
5520 $line = &read_http_connection($con);
5521 $line =~ tr/\r\n//d;
5523 $line = &read_http_connection($con);
5524 if ($line =~ /^0\s+(.*)/) {
5525 return &$main::remote_error_handler("RPC error : $1");
5527 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5528 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5529 # Started ok .. connect and save SID
5530 &close_http_connection($con);
5531 my ($port, $sid, $version, $error) = ($1, $2, $3);
5532 &open_socket($ip, $port, $sid, \$error);
5533 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5535 $fast_fh_cache{$sn} = $sid;
5536 $remote_server_version{$sn} = $version;
5539 while($stuff = &read_http_connection($con)) {
5542 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5545 elsif (!$fast_fh_cache{$sn}) {
5546 # Open the connection by running fastrpc.cgi locally
5547 pipe(RPCOUTr, RPCOUTw);
5551 open(STDOUT, ">&RPCOUTw");
5555 $ENV{'REQUEST_METHOD'} = 'GET';
5556 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5557 $ENV{'SERVER_ROOT'} ||= $root_directory;
5559 if ($base_remote_user ne 'root' &&
5560 $base_remote_user ne 'admin') {
5561 # Need to fake up a login for the CGI!
5562 &read_acl(undef, \%acl);
5563 $ENV{'BASE_REMOTE_USER'} =
5564 $ENV{'REMOTE_USER'} =
5565 $acl{'root'} ? 'root' : 'admin';
5567 delete($ENV{'FOREIGN_MODULE_NAME'});
5568 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5569 chdir($root_directory);
5570 if (!exec("$root_directory/fastrpc.cgi")) {
5571 print "exec failed : $!\n";
5578 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5582 if ($line =~ /^0\s+(.*)/) {
5583 return &$main::remote_error_handler("RPC error : $2");
5585 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5586 # Started ok .. connect and save SID
5588 my ($port, $sid, $error) = ($1, $2, undef);
5589 &open_socket("localhost", $port, $sid, \$error);
5590 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5591 $fast_fh_cache{$sn} = $sid;
5598 &error("Bad response from fastrpc.cgi : $line");
5601 # Got a connection .. send off the request
5602 my $fh = $fast_fh_cache{$sn};
5603 my $tostr = &serialise_variable($_[1]);
5604 print $fh length($tostr)," $fh\n";
5606 my $rlen = int(<$fh>);
5607 my ($fromstr, $got);
5608 while(length($fromstr) < $rlen) {
5609 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5610 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5613 my $from = &unserialise_variable($fromstr);
5615 return &$main::remote_error_handler("Remote Webmin error");
5617 if (defined($from->{'arv'})) {
5618 return @{$from->{'arv'}};
5621 return $from->{'rv'};
5625 # Call rpc.cgi on remote server
5626 my $tostr = &serialise_variable($_[1]);
5628 my $con = &make_http_connection($ip, $serv->{'port'},
5629 $serv->{'ssl'}, "POST", "/rpc.cgi");
5630 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5632 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5633 &write_http_connection($con, "User-agent: Webmin\r\n");
5634 my $auth = &encode_base64("$user:$pass");
5636 &write_http_connection($con, "Authorization: basic $auth\r\n");
5637 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5638 &write_http_connection($con, "\r\n");
5639 &write_http_connection($con, $tostr);
5641 # read back the response
5642 my $line = &read_http_connection($con);
5643 $line =~ tr/\r\n//d;
5644 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5645 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5647 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5649 $line = &read_http_connection($con);
5650 $line =~ tr/\r\n//d;
5653 while($line = &read_http_connection($con)) {
5657 my $from = &unserialise_variable($fromstr);
5658 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5659 if (defined($from->{'arv'})) {
5660 return @{$from->{'arv'}};
5663 return $from->{'rv'};
5668 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5670 Executes some function in parallel on multiple servers at once. Fills in
5671 the returns and errors arrays respectively. If the module and library
5672 parameters are given, that module is remotely required on the server first,
5673 to check if it is connectable. The parameters are :
5675 =item servers - A list of Webmin system hash references.
5677 =item parallel - Number of parallel operations to perform.
5679 =item function - Reference to function to call for each system.
5681 =item args - Additional parameters to the function.
5683 =item returns - Array ref to place return values into, in same order as servers.
5685 =item errors - Array ref to place error messages into.
5687 =item module - Optional module to require on the remote system first.
5689 =item library - Optional library to require in the module.
5692 sub remote_multi_callback
5694 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5695 &remote_error_setup(\&remote_multi_callback_error);
5697 # Call the functions
5699 foreach my $g (@$servs) {
5705 $remote_multi_callback_err = undef;
5707 # Require the remote lib
5708 &remote_foreign_require($g->{'host'}, $mod, $lib);
5709 if ($remote_multi_callback_err) {
5710 # Failed .. return error
5711 print $wh &serialise_variable(
5712 [ undef, $remote_multi_callback_err ]);
5718 my $a = ref($args) ? $args->[$p] : $args;
5719 my $rv = &$func($g, $a);
5722 print $wh &serialise_variable(
5723 [ $rv, $remote_multi_callback_err ]);
5731 # Read back the results
5733 foreach my $g (@$servs) {
5737 $errs->[$p] = "Failed to read response from $g->{'host'}";
5740 my $rv = &unserialise_variable($line);
5742 $rets->[$p] = $rv->[0];
5743 $errs->[$p] = $rv->[1];
5748 &remote_error_setup(undef);
5751 sub remote_multi_callback_error
5753 $remote_multi_callback_err = $_[0];
5756 =head2 serialise_variable(variable)
5758 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5759 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5760 called on each member to serialize the entire object.
5763 sub serialise_variable
5765 if (!defined($_[0])) {
5771 $rv = &urlize($_[0]);
5773 elsif ($r eq 'SCALAR') {
5774 $rv = &urlize(${$_[0]});
5776 elsif ($r eq 'ARRAY') {
5777 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5779 elsif ($r eq 'HASH') {
5780 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5781 &urlize(&serialise_variable($_[0]->{$_})) }
5784 elsif ($r eq 'REF') {
5785 $rv = &serialise_variable(${$_[0]});
5787 elsif ($r eq 'CODE') {
5792 # An object - treat as a hash
5793 $r = "OBJECT ".&urlize($r);
5794 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5795 &urlize(&serialise_variable($_[0]->{$_})) }
5798 return ($r ? $r : 'VAL').",".$rv;
5801 =head2 unserialise_variable(string)
5803 Converts a string created by serialise_variable() back into the original
5804 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5805 object, the same class is used on this system, if available.
5808 sub unserialise_variable
5810 my @v = split(/,/, $_[0]);
5812 if ($v[0] eq 'VAL') {
5813 @v = split(/,/, $_[0], -1);
5814 $rv = &un_urlize($v[1]);
5816 elsif ($v[0] eq 'SCALAR') {
5817 local $r = &un_urlize($v[1]);
5820 elsif ($v[0] eq 'ARRAY') {
5822 for(my $i=1; $i<@v; $i++) {
5823 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5826 elsif ($v[0] eq 'HASH') {
5828 for(my $i=1; $i<@v; $i+=2) {
5829 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5830 &unserialise_variable(&un_urlize($v[$i+1]));
5833 elsif ($v[0] eq 'REF') {
5834 local $r = &unserialise_variable($v[1]);
5837 elsif ($v[0] eq 'UNDEF') {
5840 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5841 # An object hash that we have to re-bless
5844 for(my $i=1; $i<@v; $i+=2) {
5845 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5846 &unserialise_variable(&un_urlize($v[$i+1]));
5854 =head2 other_groups(user)
5856 Returns a list of secondary groups a user is a member of, as a list of
5865 while(my @g = getgrent()) {
5866 my @m = split(/\s+/, $g[3]);
5867 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5869 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5873 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5875 Returns HTML for a button that pops up a data chooser window. The parameters
5878 =item dayfield - Name of the text field to place the day of the month into.
5880 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5882 =item yearfield - Name of the text field to place the year into.
5885 sub date_chooser_button
5887 return &theme_date_chooser_button(@_)
5888 if (defined(&theme_date_chooser_button));
5889 my ($w, $h) = (250, 225);
5890 if ($gconfig{'db_sizedate'}) {
5891 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5893 return "<input type=button onClick='window.dfield = form.$_[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";
5896 =head2 help_file(module, file)
5898 Returns the path to a module's help file of some name, typically under the
5899 help directory with a .html extension.
5904 my $mdir = &module_root_directory($_[0]);
5905 my $dir = "$mdir/help";
5906 foreach my $o (@lang_order_list) {
5907 my $lang = "$dir/$_[1].$o.html";
5908 return $lang if (-r $lang);
5910 return "$dir/$_[1].html";
5915 Seeds the random number generator, if not already done in this script. On Linux
5916 this makes use of the current time, process ID and a read from /dev/urandom.
5917 On other systems, only the current time and process ID are used.
5922 if (!$main::done_seed_random) {
5923 if (open(RANDOM, "/dev/urandom")) {
5925 read(RANDOM, $buf, 4);
5927 srand(time() ^ $$ ^ $buf);
5932 $main::done_seed_random = 1;
5936 =head2 disk_usage_kb(directory)
5938 Returns the number of kB used by some directory and all subdirs. Implemented
5939 by calling the C<du -k> command.
5944 my $dir = &translate_filename($_[0]);
5946 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5948 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5950 return $out =~ /^([0-9]+)/ ? $1 : "???";
5953 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
5955 Returns the number of bytes taken up by all files in some directory and all
5956 sub-directories, by summing up their lengths. The disk_usage_kb is more
5957 reflective of reality, as the filesystem typically pads file sizes to 1k or
5961 sub recursive_disk_usage
5963 my $dir = &translate_filename($_[0]);
5970 my @st = stat($dir);
5976 my @files = readdir(DIR);
5978 foreach my $f (@files) {
5979 next if ($f eq "." || $f eq "..");
5980 next if ($skip && $f =~ /$skip/);
5981 next if ($only && $f !~ /$only/);
5982 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
5988 =head2 help_search_link(term, [ section, ... ] )
5990 Returns HTML for a link to the man module for searching local and online
5991 docs for various search terms. The term parameter can either be a single
5992 word like 'bind', or a space-separated list of words. This function is typically
5993 used by modules that want to refer users to additional documentation in man
5994 pages or local system doc files.
5997 sub help_search_link
5999 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6000 my $for = &urlize(shift(@_));
6001 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6002 join("&", map { "section=$_" } @_)."&".
6003 "for=$for&exact=1&check=".&get_module_name()."'>".
6004 $text{'helpsearch'}."</a>\n";
6011 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6013 Opens a connection to some HTTP server, maybe through a proxy, and returns
6014 a handle object. The handle can then be used to send additional headers
6015 and read back a response. If anything goes wrong, returns an error string.
6016 The parameters are :
6018 =item host - Hostname or IP address of the webserver to connect to.
6020 =item port - HTTP port number to connect to.
6022 =item ssl - Set to 1 to connect in SSL mode.
6024 =item method - HTTP method, like GET or POST.
6026 =item page - Page to request on the webserver, like /foo/index.html
6028 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6031 sub make_http_connection
6033 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6036 foreach my $h (@$headers) {
6037 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6041 if (&is_readonly_mode()) {
6042 return "HTTP connections not allowed in readonly mode";
6044 my $rv = { 'fh' => time().$$ };
6047 eval "use Net::SSLeay";
6048 $@ && return $text{'link_essl'};
6049 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6050 eval "Net::SSLeay::load_error_strings()";
6051 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6052 return "Failed to create SSL context";
6053 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6054 return "Failed to create SSL connection";
6056 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6057 !&no_proxy($host)) {
6060 &open_socket($1, $2, $rv->{'fh'}, \$error);
6063 my $fh = $rv->{'fh'};
6064 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6065 if ($gconfig{'proxy_user'}) {
6066 my $auth = &encode_base64(
6067 "$gconfig{'proxy_user'}:".
6068 "$gconfig{'proxy_pass'}");
6069 $auth =~ tr/\r\n//d;
6070 print $fh "Proxy-Authorization: Basic $auth\r\n";
6074 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6075 return "Proxy error : $3" if ($2 != 200);
6078 return "Proxy error : $line";
6083 elsif (!$gconfig{'proxy_fallback'}) {
6084 # Connection to proxy failed - give up
6091 &open_socket($host, $port, $rv->{'fh'}, \$error);
6092 return $error if ($error);
6094 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6095 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6096 return "SSL connect() failed";
6097 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6098 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6101 # Plain HTTP request
6103 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6104 !&no_proxy($host)) {
6107 &open_socket($1, $2, $rv->{'fh'}, \$error);
6111 my $fh = $rv->{'fh'};
6112 my $rtxt = $method." ".
6113 "http://$host:$port$page HTTP/1.0\r\n";
6114 if ($gconfig{'proxy_user'}) {
6115 my $auth = &encode_base64(
6116 "$gconfig{'proxy_user'}:".
6117 "$gconfig{'proxy_pass'}");
6118 $auth =~ tr/\r\n//d;
6119 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6124 elsif (!$gconfig{'proxy_fallback'}) {
6129 # Connecting directly
6131 &open_socket($host, $port, $rv->{'fh'}, \$error);
6132 return $error if ($error);
6133 my $fh = $rv->{'fh'};
6134 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6141 =head2 read_http_connection(&handle, [bytes])
6143 Reads either one line or up to the specified number of bytes from the handle,
6144 originally supplied by make_http_connection.
6147 sub read_http_connection
6151 if ($h->{'ssl_con'}) {
6154 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6155 # need to read more..
6156 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6158 $rv = $h->{'buffer'};
6159 delete($h->{'buffer'});
6162 $h->{'buffer'} .= $more;
6164 $rv = substr($h->{'buffer'}, 0, $idx+1);
6165 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6168 if (length($h->{'buffer'})) {
6169 $rv = $h->{'buffer'};
6170 delete($h->{'buffer'});
6173 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6179 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6182 my $fh = $h->{'fh'};
6186 $rv = undef if ($rv eq "");
6190 =head2 write_http_connection(&handle, [data+])
6192 Writes the given data to the given HTTP connection handle.
6195 sub write_http_connection
6198 my $fh = $h->{'fh'};
6200 if ($h->{'ssl_ctx'}) {
6201 foreach my $s (@_) {
6202 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6203 $allok = 0 if (!$ok);
6207 my $ok = (print $fh @_);
6208 $allok = 0 if (!$ok);
6213 =head2 close_http_connection(&handle)
6215 Closes a connection to an HTTP server, identified by the given handle.
6218 sub close_http_connection
6224 =head2 clean_environment
6226 Deletes any environment variables inherited from miniserv so that they
6227 won't be passed to programs started by webmin. This is useful when calling
6228 programs that check for CGI-related environment variables and modify their
6229 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6232 sub clean_environment
6234 %UNCLEAN_ENV = %ENV;
6235 foreach my $k (keys %ENV) {
6236 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6240 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6241 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6242 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6243 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6244 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6245 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6246 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6247 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD') {
6252 =head2 reset_environment
6254 Puts the environment back how it was before clean_environment was callled.
6257 sub reset_environment
6259 if (defined(%UNCLEAN_ENV)) {
6260 foreach my $k (keys %UNCLEAN_ENV) {
6261 $ENV{$k} = $UNCLEAN_ENV{$k};
6263 undef(%UNCLEAN_ENV);
6267 =head2 progress_callback
6269 Never called directly, but useful for passing to &http_download to print
6270 out progress of an HTTP request.
6273 sub progress_callback
6275 if (defined(&theme_progress_callback)) {
6276 # Call the theme override
6277 return &theme_progress_callback(@_);
6281 print $progress_callback_prefix;
6283 $progress_size = $_[1];
6284 $progress_step = int($_[1] / 10);
6285 print &text('progress_size2', $progress_callback_url,
6286 &nice_size($progress_size)),"<br>\n";
6289 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6291 $last_progress_time = $last_progress_size = undef;
6293 elsif ($_[0] == 3) {
6295 my $sp = $progress_callback_prefix.(" " x 5);
6296 if ($progress_size) {
6297 # And we have a size to compare against
6298 my $st = int(($_[1] * 10) / $progress_size);
6299 my $time_now = time();
6300 if ($st != $progress_step ||
6301 $time_now - $last_progress_time > 60) {
6302 # Show progress every 10% or 60 seconds
6303 print $sp,&text('progress_datan', &nice_size($_[1]),
6304 int($_[1]*100/$progress_size)),"<br>\n";
6305 $last_progress_time = $time_now;
6307 $progress_step = $st;
6310 # No total size .. so only show in 100k jumps
6311 if ($_[1] > $last_progress_size+100*1024) {
6312 print $sp,&text('progress_data2n',
6313 &nice_size($_[1])),"<br>\n";
6314 $last_progress_size = $_[1];
6318 elsif ($_[0] == 4) {
6319 # All done downloading
6320 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6322 elsif ($_[0] == 5) {
6323 # Got new location after redirect
6324 $progress_callback_url = $_[1];
6326 elsif ($_[0] == 6) {
6328 $progress_callback_url = $_[1];
6329 print &text('progress_incache', $progress_callback_url),"<br>\n";
6333 =head2 switch_to_remote_user
6335 Changes the user and group of the current process to that of the unix user
6336 with the same name as the current webmin login, or fails if there is none.
6337 This should be called by Usermin module scripts that only need to run with
6338 limited permissions.
6341 sub switch_to_remote_user
6343 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6345 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6346 &create_missing_homedir(\@remote_user_info);
6348 &switch_to_unix_user(\@remote_user_info);
6349 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6350 $ENV{'HOME'} = $remote_user_info[7];
6352 # Export global variables to caller
6353 if ($main::export_to_caller) {
6354 my ($callpkg) = caller();
6355 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6359 =head2 switch_to_unix_user(&user-details)
6361 Switches the current process to the UID and group ID from the given list
6362 of user details, which must be in the format returned by getpwnam.
6365 sub switch_to_unix_user
6368 if (!defined($uinfo->[0])) {
6369 # No username given, so just use given GID
6370 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6373 # Use all groups from user
6374 ($(, $)) = ( $uinfo->[3],
6375 "$uinfo->[3] ".join(" ", $uinfo->[3],
6376 &other_groups($uinfo->[0])) );
6379 POSIX::setuid($uinfo->[2]);
6381 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6382 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6386 =head2 eval_as_unix_user(username, &code)
6388 Runs some code fragment with the effective UID and GID switch to that
6389 of the given Unix user, so that file IO takes place with his permissions.
6393 sub eval_as_unix_user
6395 my ($user, $code) = @_;
6396 my @uinfo = getpwnam($user);
6397 if (!scalar(@uinfo)) {
6398 &error("eval_as_unix_user called with invalid user $user");
6400 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6404 local $main::error_must_die = 1;
6411 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6414 return wantarray ? @rv : $rv[0];
6417 =head2 create_user_config_dirs
6419 Creates per-user config directories and sets $user_config_directory and
6420 $user_module_config_directory to them. Also reads per-user module configs
6421 into %userconfig. This should be called by Usermin module scripts that need
6422 to store per-user preferences or other settings.
6425 sub create_user_config_dirs
6427 return if (!$gconfig{'userconfig'});
6428 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6429 return if (!@uinfo || !$uinfo[7]);
6430 &create_missing_homedir(\@uinfo);
6431 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6432 if (!-d $user_config_directory) {
6433 mkdir($user_config_directory, 0700) ||
6434 &error("Failed to create $user_config_directory : $!");
6435 if ($< == 0 && $uinfo[2]) {
6436 chown($uinfo[2], $uinfo[3], $user_config_directory);
6439 if (&get_module_name()) {
6440 $user_module_config_directory = $user_config_directory."/".
6442 if (!-d $user_module_config_directory) {
6443 mkdir($user_module_config_directory, 0700) ||
6444 &error("Failed to create $user_module_config_directory : $!");
6445 if ($< == 0 && $uinfo[2]) {
6446 chown($uinfo[2], $uinfo[3], $user_config_directory);
6450 &read_file_cached("$module_root_directory/defaultuconfig",
6452 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6453 &read_file_cached("$user_module_config_directory/config",
6457 # Export global variables to caller
6458 if ($main::export_to_caller) {
6459 my ($callpkg) = caller();
6460 foreach my $v ('$user_config_directory',
6461 '$user_module_config_directory', '%userconfig') {
6462 my ($vt, $vn) = split('', $v, 2);
6463 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6468 =head2 create_missing_homedir(&uinfo)
6470 If auto homedir creation is enabled, create one for this user if needed.
6471 For internal use only.
6474 sub create_missing_homedir
6477 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6478 # Use has no home dir .. make one
6479 system("mkdir -p ".quotemeta($uinfo->[7]));
6480 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6481 if ($gconfig{'create_homedir_perms'} ne '') {
6482 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6487 =head2 filter_javascript(text)
6489 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6490 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6493 sub filter_javascript
6496 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6497 $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;
6498 $rv =~ s/(javascript:)/x$1/gi;
6499 $rv =~ s/(vbscript:)/x$1/gi;
6503 =head2 resolve_links(path)
6505 Given a path that may contain symbolic links, returns the real path.
6511 $path =~ s/\/+/\//g;
6512 $path =~ s/\/$// if ($path ne "/");
6513 my @p = split(/\/+/, $path);
6515 for(my $i=0; $i<@p; $i++) {
6516 my $sofar = "/".join("/", @p[0..$i]);
6517 my $lnk = readlink($sofar);
6518 if ($lnk eq $sofar) {
6519 # Link to itself! Cannot do anything more really ..
6522 elsif ($lnk =~ /^\//) {
6523 # Link is absolute..
6524 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6528 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6534 =head2 simplify_path(path, bogus)
6536 Given a path, maybe containing elements ".." and "." , convert it to a
6537 clean, absolute form. Returns undef if this is not possible.
6545 my @bits = split(/\/+/, $dir);
6548 foreach my $b (@bits) {
6552 elsif ($b eq "..") {
6554 if (scalar(@fixedbits) == 0) {
6555 # Cannot! Already at root!
6562 push(@fixedbits, $b);
6565 return "/".join('/', @fixedbits);
6568 =head2 same_file(file1, file2)
6570 Returns 1 if two files are actually the same
6575 return 1 if ($_[0] eq $_[1]);
6576 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6577 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6578 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6579 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6580 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6581 return 0 if (!@stat1 || !@stat2);
6582 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6585 =head2 flush_webmin_caches
6587 Clears all in-memory and on-disk caches used by Webmin.
6590 sub flush_webmin_caches
6592 undef(%main::read_file_cache);
6593 undef(%main::acl_hash_cache);
6594 undef(%main::acl_array_cache);
6595 undef(%main::has_command_cache);
6596 undef(@main::list_languages_cache);
6597 undef($main::got_list_usermods_cache);
6598 undef(@main::list_usermods_cache);
6599 undef(%main::foreign_installed_cache);
6600 unlink("$config_directory/module.infos.cache");
6601 &get_all_module_infos();
6604 =head2 list_usermods
6606 Returns a list of additional module restrictions. For internal use in
6612 if (!$main::got_list_usermods_cache) {
6613 @main::list_usermods_cache = ( );
6615 open(USERMODS, "$config_directory/usermin.mods");
6617 if (/^([^:]+):(\+|-|):(.*)/) {
6618 push(@main::list_usermods_cache,
6619 [ $1, $2, [ split(/\s+/, $3) ] ]);
6623 $main::got_list_usermods_cache = 1;
6625 return @main::list_usermods_cache;
6628 =head2 available_usermods(&allmods, &usermods)
6630 Returns a list of modules that are available to the given user, based
6631 on usermod additional/subtractions. For internal use by Usermin only.
6634 sub available_usermods
6636 return @{$_[0]} if (!@{$_[1]});
6638 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6639 my @uinfo = @remote_user_info;
6640 @uinfo = getpwnam($remote_user) if (!@uinfo);
6641 foreach my $u (@{$_[1]}) {
6643 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6646 elsif ($u->[0] =~ /^\@(.*)$/) {
6647 # Check for group membership
6648 my @ginfo = getgrnam($1);
6649 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6650 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6652 elsif ($u->[0] =~ /^\//) {
6653 # Check users and groups in file
6655 open(USERFILE, $u->[0]);
6658 if ($_ eq $remote_user) {
6661 elsif (/^\@(.*)$/) {
6662 my @ginfo = getgrnam($1);
6664 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6665 &indexof($remote_user,
6666 split(/\s+/, $ginfo[3])) >= 0));
6673 if ($u->[1] eq "+") {
6674 map { $mods{$_}++ } @{$u->[2]};
6676 elsif ($u->[1] eq "-") {
6677 map { delete($mods{$_}) } @{$u->[2]};
6681 map { $mods{$_}++ } @{$u->[2]};
6685 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6688 =head2 get_available_module_infos(nocache)
6690 Returns a list of modules available to the current user, based on
6691 operating system support, access control and usermod restrictions. Useful
6692 in themes that need to display a list of modules the user can use.
6693 Each element of the returned array is a hash reference in the same format as
6694 returned by get_module_info.
6697 sub get_available_module_infos
6700 &read_acl(\%acl, \%uacl);
6701 my $risk = $gconfig{'risk_'.$base_remote_user};
6703 foreach my $minfo (&get_all_module_infos($_[0])) {
6704 next if (!&check_os_support($minfo));
6706 # Check module risk level
6707 next if ($risk ne 'high' && $minfo->{'risk'} &&
6708 $minfo->{'risk'} !~ /$risk/);
6712 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6713 !$acl{$base_remote_user,"*"});
6715 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6719 # Check usermod restrictions
6720 my @usermods = &list_usermods();
6721 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6722 &available_usermods(\@rv, \@usermods);
6724 # Check RBAC restrictions
6726 foreach my $m (@rv) {
6727 if (&supports_rbac($m->{'dir'}) &&
6728 &use_rbac_module_acl(undef, $m->{'dir'})) {
6729 local $rbacs = &get_rbac_module_acl($remote_user,
6737 # Module or system doesn't support RBAC
6738 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6744 if (defined(&theme_foreign_available)) {
6745 foreach my $m (@rbacrv) {
6746 if (&theme_foreign_available($m->{'dir'})) {
6755 # Check licence module vetos
6757 if ($main::licence_module) {
6758 foreach my $m (@themerv) {
6759 if (&foreign_call($main::licence_module,
6760 "check_module_licence", $m->{'dir'})) {
6772 =head2 get_visible_module_infos(nocache)
6774 Like get_available_module_infos, but excludes hidden modules from the list.
6775 Each element of the returned array is a hash reference in the same format as
6776 returned by get_module_info.
6779 sub get_visible_module_infos
6782 my $pn = &get_product_name();
6783 return grep { !$_->{'hidden'} &&
6784 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6787 =head2 get_visible_modules_categories(nocache)
6789 Returns a list of Webmin module categories, each of which is a hash ref
6790 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6791 of modules in the category, in the format returned by get_module_info.
6792 Un-used modules are automatically assigned to the 'unused' category, and
6793 those with no category are put into 'others'.
6796 sub get_visible_modules_categories
6799 my @mods = &get_visible_module_infos($nocache);
6801 if (&get_product_name() eq 'webmin') {
6802 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6803 @mods = grep { $_->{'installed'} ne '0' } @mods;
6805 my %cats = &list_categories(\@mods);
6807 foreach my $c (keys %cats) {
6808 my $cat = { 'code' => $c || 'other',
6809 'desc' => $cats{$c} };
6810 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6813 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6814 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6816 # Add un-installed modules in magic category
6817 my $cat = { 'code' => 'unused',
6818 'desc' => $text{'main_unused'},
6820 'modules' => \@unmods };
6826 =head2 is_under_directory(directory, file)
6828 Returns 1 if the given file is under the specified directory, 0 if not.
6829 Symlinks are taken into account in the file to find it's 'real' location.
6832 sub is_under_directory
6834 my ($dir, $file) = @_;
6835 return 1 if ($dir eq "/");
6836 return 0 if ($file =~ /\.\./);
6837 my $ld = &resolve_links($dir);
6839 return &is_under_directory($ld, $file);
6841 my $lp = &resolve_links($file);
6843 return &is_under_directory($dir, $lp);
6845 return 0 if (length($file) < length($dir));
6846 return 1 if ($dir eq $file);
6848 return substr($file, 0, length($dir)) eq $dir;
6851 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6853 Given an absolute URL, returns the host, port, page and ssl flag components.
6854 Relative URLs can also be parsed, if the base information is provided.
6859 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6861 my $ssl = $1 eq 'https';
6862 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6868 elsif ($_[0] =~ /^\/\S*$/) {
6869 # A relative to the server URL
6870 return ($_[1], $_[2], $_[0], $_[4]);
6873 # A relative to the directory URL
6875 $page =~ s/[^\/]+$//;
6876 return ($_[1], $_[2], $page.$_[0], $_[4]);
6880 =head2 check_clicks_function
6882 Returns HTML for a JavaScript function called check_clicks that returns
6883 true when first called, but false subsequently. Useful on onClick for
6884 critical buttons. Deprecated, as this method of preventing duplicate actions
6888 sub check_clicks_function
6893 function check_clicks(form)
6900 for(i=0; i<form.length; i++)
6901 form.elements[i].disabled = true;
6910 =head2 load_entities_map
6912 Returns a hash ref containing mappings between HTML entities (like ouml) and
6913 ascii values (like 246). Mainly for internal use.
6916 sub load_entities_map
6918 if (!defined(%entities_map_cache)) {
6920 open(EMAP, "$root_directory/entities_map.txt");
6922 if (/^(\d+)\s+(\S+)/) {
6923 $entities_map_cache{$2} = $1;
6928 return \%entities_map_cache;
6931 =head2 entities_to_ascii(string)
6933 Given a string containing HTML entities like ö and 7, replace them
6934 with their ASCII equivalents.
6937 sub entities_to_ascii
6940 my $emap = &load_entities_map();
6941 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6942 $str =~ s/&#(\d+);/chr($1)/ge;
6946 =head2 get_product_name
6948 Returns either 'webmin' or 'usermin', depending on which program the current
6949 module is in. Useful for modules that can be installed into either.
6952 sub get_product_name
6954 return $gconfig{'product'} if (defined($gconfig{'product'}));
6955 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6960 Returns the character set for the current language, such as iso-8859-1.
6965 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6966 $current_lang_info->{'charset'} ?
6967 $current_lang_info->{'charset'} : $default_charset;
6971 =head2 get_display_hostname
6973 Returns the system's hostname for UI display purposes. This may be different
6974 from the actual hostname if you administrator has configured it so in the
6975 Webmin Configuration module.
6978 sub get_display_hostname
6980 if ($gconfig{'hostnamemode'} == 0) {
6981 return &get_system_hostname();
6983 elsif ($gconfig{'hostnamemode'} == 3) {
6984 return $gconfig{'hostnamedisplay'};
6987 my $h = $ENV{'HTTP_HOST'};
6989 if ($gconfig{'hostnamemode'} == 2) {
6990 $h =~ s/^(www|ftp|mail)\.//i;
6996 =head2 save_module_config([&config], [modulename])
6998 Saves the configuration for some module. The config parameter is an optional
6999 hash reference of names and values to save, which defaults to the global
7000 %config hash. The modulename parameter is the module to update the config
7001 file, which defaults to the current module.
7004 sub save_module_config
7006 my $c = $_[0] || { &get_module_variable('%config') };
7007 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7008 &write_file("$config_directory/$m/config", $c);
7011 =head2 save_user_module_config([&config], [modulename])
7013 Saves the user's Usermin preferences for some module. The config parameter is
7014 an optional hash reference of names and values to save, which defaults to the
7015 global %userconfig hash. The modulename parameter is the module to update the
7016 config file, which defaults to the current module.
7019 sub save_user_module_config
7021 my $c = $_[0] || { &get_module_variable('%userconfig') };
7022 my $m = $_[1] || &get_module_name();
7023 my $ucd = $user_config_directory;
7025 my @uinfo = @remote_user_info ? @remote_user_info
7026 : getpwnam($remote_user);
7027 return if (!@uinfo || !$uinfo[7]);
7028 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7030 &write_file("$ucd/$m/config", $c);
7033 =head2 nice_size(bytes, [min])
7035 Converts a number of bytes into a number followed by a suffix like GB, MB
7036 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7037 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7042 my ($units, $uname);
7043 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7044 $units = 1024*1024*1024*1024;
7047 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7048 $units = 1024*1024*1024;
7051 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7055 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7063 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7065 return $sz." ".$uname;
7068 =head2 get_perl_path
7070 Returns the path to Perl currently in use, such as /usr/bin/perl.
7075 if (open(PERL, "$config_directory/perl-path")) {
7081 return $^X if (-x $^X);
7082 return &has_command("perl");
7085 =head2 get_goto_module([&mods])
7087 Returns the details of a module that the current user should be re-directed
7088 to after logging in, or undef if none. Useful for themes.
7093 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7094 if ($gconfig{'gotomodule'}) {
7095 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7096 return $goto if ($goto);
7098 if (@mods == 1 && $gconfig{'gotoone'}) {
7104 =head2 select_all_link(field, form, [text])
7106 Returns HTML for a 'Select all' link that uses Javascript to select
7107 multiple checkboxes with the same name. The parameters are :
7109 =item field - Name of the checkbox inputs.
7111 =item form - Index of the form on the page.
7113 =item text - Message for the link, defaulting to 'Select all'.
7118 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7119 my ($field, $form, $text) = @_;
7121 $text ||= $text{'ui_selall'};
7122 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7125 =head2 select_invert_link(field, form, text)
7127 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7128 selection on multiple checkboxes with the same name. The parameters are :
7130 =item field - Name of the checkbox inputs.
7132 =item form - Index of the form on the page.
7134 =item text - Message for the link, defaulting to 'Invert selection'.
7137 sub select_invert_link
7139 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7140 my ($field, $form, $text) = @_;
7142 $text ||= $text{'ui_selinv'};
7143 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7146 =head2 select_rows_link(field, form, text, &rows)
7148 Returns HTML for a link that uses Javascript to select rows with particular
7149 values for their checkboxes. The parameters are :
7151 =item field - Name of the checkbox inputs.
7153 =item form - Index of the form on the page.
7155 =item text - Message for the link, de
7157 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7160 sub select_rows_link
7162 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7163 my ($field, $form, $text, $rows) = @_;
7165 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7166 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7167 $js .= "return false;";
7168 return "<a href='#' onClick='$js'>$text</a>";
7171 =head2 check_pid_file(file)
7173 Given a pid file, returns the PID it contains if the process is running.
7178 open(PIDFILE, $_[0]) || return undef;
7179 my $pid = <PIDFILE>;
7181 $pid =~ /^\s*(\d+)/ || return undef;
7182 kill(0, $1) || return undef;
7188 Return the local os-specific library name to this module. For internal use only.
7193 my $mn = &get_module_name();
7194 my $md = &module_root_directory($mn);
7195 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7196 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7198 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7199 return "$mn-$gconfig{'os_type'}-lib.pl";
7201 elsif (-r "$md/$mn-generic-lib.pl") {
7202 return "$mn-generic-lib.pl";
7209 =head2 module_root_directory(module)
7211 Given a module name, returns its root directory. On a typical Webmin install,
7212 all modules are under the same directory - but it is theoretically possible to
7216 sub module_root_directory
7218 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7219 if (@root_directories > 1) {
7220 foreach my $r (@root_directories) {
7226 return "$root_directories[0]/$d";
7229 =head2 list_mime_types
7231 Returns a list of all known MIME types and their extensions, as a list of hash
7232 references with keys :
7234 =item type - The MIME type, like text/plain.
7236 =item exts - A list of extensions, like .doc and .avi.
7238 =item desc - A human-readable description for the MIME type.
7243 if (!@list_mime_types_cache) {
7245 open(MIME, "$root_directory/mime.types");
7249 if (s/#\s*(.*)$//g) {
7252 my ($type, @exts) = split(/\s+/);
7254 push(@list_mime_types_cache, { 'type' => $type,
7261 return @list_mime_types_cache;
7264 =head2 guess_mime_type(filename, [default])
7266 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7267 The optional default parameter sets a default type of use if none is found,
7268 which defaults to application/octet-stream.
7273 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7275 foreach my $t (&list_mime_types()) {
7276 foreach my $e (@{$t->{'exts'}}) {
7277 return $t->{'type'} if (lc($e) eq lc($ext));
7281 return @_ > 1 ? $_[1] : "application/octet-stream";
7284 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7286 Opens a file handle for writing to a temporary file, which will only be
7287 renamed over the real file when the handle is closed. This allows critical
7288 files like /etc/shadow to be updated safely, even if writing fails part way
7289 through due to lack of disk space. The parameters are :
7291 =item handle - File handle to open, as you would use in Perl's open function.
7293 =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.
7295 =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 $! with the error code.
7297 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7299 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7305 # Just getting a temp file
7306 if (!defined($main::open_tempfiles{$_[0]})) {
7307 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7308 my $dir = $1 || "/";
7309 my $tmp = "$dir/$2.webmintmp.$$";
7310 $main::open_tempfiles{$_[0]} = $tmp;
7311 push(@main::temporary_files, $tmp);
7313 return $main::open_tempfiles{$_[0]};
7317 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7318 $fh = &callers_package($fh);
7320 my %gaccess = &get_module_acl(undef, "");
7321 my $db = $gconfig{'debug_what_write'};
7322 if ($file =~ /\r|\n|\0/) {
7323 if ($noerror) { return 0; }
7324 else { &error("Filename contains invalid characters"); }
7326 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7327 # Read-only mode .. veto all writes
7328 print STDERR "vetoing write to $file\n";
7329 return open($fh, ">$null_file");
7331 elsif ($file =~ /^(>|>>|)nul$/i) {
7332 # Write to Windows null device
7333 &webmin_debug_log($1 eq ">" ? "WRITE" :
7334 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7336 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7337 # Writes to /dev/null or TTYs don't need to be handled
7338 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7339 return open($fh, $file);
7341 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7342 &webmin_debug_log("WRITE", $1) if ($db);
7343 # Over-writing a file, via a temp file
7345 $file = &translate_filename($file);
7347 # Open the link target instead
7348 $file = &resolve_links($file);
7351 # Cannot open a directory!
7352 if ($noerror) { return 0; }
7353 else { &error("Cannot write to directory $file"); }
7355 my $tmp = &open_tempfile($file);
7356 my $ex = open($fh, ">$tmp");
7357 if (!$ex && $! =~ /permission/i) {
7358 # Could not open temp file .. try opening actual file
7360 $ex = open($fh, ">$file");
7361 delete($main::open_tempfiles{$file});
7364 $main::open_temphandles{$fh} = $file;
7367 if (!$ex && !$noerror) {
7368 &error(&text("efileopen", $file, $!));
7372 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7373 # Just writing direct to a file
7374 &webmin_debug_log("WRITE", $1) if ($db);
7376 $file = &translate_filename($file);
7377 my @old_attributes = &get_clear_file_attributes($file);
7378 my $ex = open($fh, ">$file");
7379 &reset_file_attributes($file, \@old_attributes);
7380 $main::open_temphandles{$fh} = $file;
7381 if (!$ex && !$noerror) {
7382 &error(&text("efileopen", $file, $!));
7387 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7388 # Appending to a file .. nothing special to do
7389 &webmin_debug_log("APPEND", $1) if ($db);
7391 $file = &translate_filename($file);
7392 my @old_attributes = &get_clear_file_attributes($file);
7393 my $ex = open($fh, ">>$file");
7394 &reset_file_attributes($file, \@old_attributes);
7395 $main::open_temphandles{$fh} = $file;
7396 if (!$ex && !$noerror) {
7397 &error(&text("efileopen", $file, $!));
7402 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7403 # Read mode .. nothing to do here
7404 &webmin_debug_log("READ", $file) if ($db);
7405 $file = &translate_filename($file);
7406 return open($fh, $file);
7408 elsif ($file eq ">" || $file eq ">>") {
7409 my ($package, $filename, $line) = caller;
7410 if ($noerror) { return 0; }
7411 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7414 my ($package, $filename, $line) = caller;
7415 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7420 =head2 close_tempfile(file|handle)
7422 Copies a temp file to the actual file, assuming that all writes were
7423 successful. The handle must have been one passed to open_tempfile.
7429 my $fh = &callers_package($_[0]);
7431 if (defined($file = $main::open_temphandles{$fh})) {
7433 close($fh) || &error(&text("efileclose", $file, $!));
7434 delete($main::open_temphandles{$fh});
7435 return &close_tempfile($file);
7437 elsif (defined($main::open_tempfiles{$_[0]})) {
7439 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7440 my @st = stat($_[0]);
7441 if (&is_selinux_enabled() && &has_command("chcon")) {
7442 # Set original security context
7443 system("chcon --reference=".quotemeta($_[0]).
7444 " ".quotemeta($main::open_tempfiles{$_[0]}).
7445 " >/dev/null 2>&1");
7447 my @old_attributes = &get_clear_file_attributes($_[0]);
7448 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7450 # Set original permissions and ownership
7451 chmod($st[2], $_[0]);
7452 chown($st[4], $st[5], $_[0]);
7454 &reset_file_attributes($_[0], \@old_attributes);
7455 delete($main::open_tempfiles{$_[0]});
7456 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7457 if ($main::open_templocks{$_[0]}) {
7458 &unlock_file($_[0]);
7459 delete($main::open_templocks{$_[0]});
7464 # Must be closing a handle not associated with a file
7470 =head2 print_tempfile(handle, text, ...)
7472 Like the normal print function, but calls &error on failure. Useful when
7473 combined with open_tempfile, to ensure that a criticial file is never
7474 only partially written.
7479 my ($fh, @args) = @_;
7480 $fh = &callers_package($fh);
7481 (print $fh @args) || &error(&text("efilewrite",
7482 $main::open_temphandles{$fh} || $fh, $!));
7485 =head2 is_selinux_enabled
7487 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7490 sub is_selinux_enabled
7492 if (!defined($main::selinux_enabled_cache)) {
7494 if ($gconfig{'os_type'} !~ /-linux$/) {
7495 # Not on linux, so no way
7496 $main::selinux_enabled_cache = 0;
7498 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7499 # Use global config file
7500 $main::selinux_enabled_cache =
7501 $seconfig{'SELINUX'} eq 'disabled' ||
7502 !$seconfig{'SELINUX'} ? 0 : 1;
7505 # Use selinuxenabled command
7506 #$selinux_enabled_cache =
7507 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7508 $main::selinux_enabled_cache = 0;
7511 return $main::selinux_enabled_cache;
7514 =head2 get_clear_file_attributes(file)
7516 Finds file attributes that may prevent writing, clears them and returns them
7517 as a list. May call error. Mainly for internal use by open_tempfile and
7521 sub get_clear_file_attributes
7525 if ($gconfig{'chattr'}) {
7526 # Get original immutable bit
7527 my $out = &backquote_command(
7528 "lsattr ".quotemeta($file)." 2>/dev/null");
7530 $out =~ s/\s\S+\n//;
7531 @old_attributes = grep { $_ ne '-' } split(//, $out);
7533 if (&indexof("i", @old_attributes) >= 0) {
7534 my $err = &backquote_logged(
7535 "chattr -i ".quotemeta($file)." 2>&1");
7537 &error("Failed to remove immutable bit on ".
7542 return @old_attributes;
7545 =head2 reset_file_attributes(file, &attributes)
7547 Put back cleared attributes on some file. May call error. Mainly for internal
7548 use by close_tempfile.
7551 sub reset_file_attributes
7553 my ($file, $old_attributes) = @_;
7554 if (&indexof("i", @$old_attributes) >= 0) {
7555 my $err = &backquote_logged(
7556 "chattr +i ".quotemeta($file)." 2>&1");
7558 &error("Failed to restore immutable bit on ".
7564 =head2 cleanup_tempnames
7566 Remove all temporary files generated using transname. Typically only called
7567 internally when a Webmin script exits.
7570 sub cleanup_tempnames
7572 foreach my $t (@main::temporary_files) {
7575 @main::temporary_files = ( );
7578 =head2 open_lock_tempfile([handle], file, [no-error])
7580 Returns a temporary file for writing to some actual file, and also locks it.
7581 Effectively the same as calling lock_file and open_tempfile on the same file,
7582 but calls the unlock for you automatically when it is closed.
7585 sub open_lock_tempfile
7587 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7588 $fh = &callers_package($fh);
7589 my $lockfile = $file;
7590 $lockfile =~ s/^[^\/]*//;
7591 if ($lockfile =~ /^\//) {
7592 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7594 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7599 $main::end_exit_status ||= $?;
7600 if ($$ == $main::initial_process_id) {
7601 # Exiting from initial process
7602 &cleanup_tempnames();
7603 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7604 $main::debug_log_start_module eq &get_module_name()) {
7605 my $len = time() - $main::debug_log_start_time;
7606 &webmin_debug_log("STOP", "runtime=$len");
7607 $main::debug_log_start_time = 0;
7609 if (!$ENV{'SCRIPT_NAME'} &&
7610 $main::initial_module_name eq &get_module_name()) {
7611 # In a command-line script - call the real exit, so that the
7612 # exit status gets properly propogated. In some cases this
7613 # was not happening.
7614 exit($main::end_exit_status);
7619 =head2 month_to_number(month)
7621 Converts a month name like feb to a number like 1.
7626 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7629 =head2 number_to_month(number)
7631 Converts a number like 1 to a month name like Feb.
7636 return ucfirst($number_to_month_map{$_[0]});
7639 =head2 get_rbac_module_acl(user, module)
7641 Returns a hash reference of RBAC overrides ACLs for some user and module.
7642 May return undef if none exist (indicating access denied), or the string *
7643 if full access is granted.
7646 sub get_rbac_module_acl
7648 my ($user, $mod) = @_;
7649 eval "use Authen::SolarisRBAC";
7650 return undef if ($@);
7653 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7654 # Automagic webmin.modulename.admin authorization exists .. allow access
7656 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7657 %rv = ( 'noconfig' => 1 );
7664 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7668 my ($auths, $acls) = split(/\s+/, $_);
7669 my @auths = split(/,/, $auths);
7671 my ($merge) = ($acls =~ s/^\+//);
7673 if ($auths eq "*") {
7674 # These ACLs apply to all RBAC users.
7675 # Only if there is some that match a specific authorization
7676 # later will they be used though.
7679 # Check each of the RBAC authorizations
7680 foreach my $a (@auths) {
7681 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7686 $foundany++ if ($gotall);
7689 # Found an RBAC authorization - return the ACLs
7690 return "*" if ($acls eq "*");
7691 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7693 # Just add to current set
7694 foreach my $a (keys %acl) {
7705 return !$foundany ? undef : %rv ? \%rv : undef;
7708 =head2 supports_rbac([module])
7710 Returns 1 if RBAC client support is available, such as on Solaris.
7715 return 0 if ($gconfig{'os_type'} ne 'solaris');
7716 eval "use Authen::SolarisRBAC";
7719 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7724 =head2 use_rbac_module_acl(user, module)
7726 Returns 1 if some user should use RBAC to get permissions for a module
7729 sub use_rbac_module_acl
7731 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7732 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7733 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7734 my %access = &get_module_acl($u, $m, 1);
7735 return $access{'rbac'} ? 1 : 0;
7738 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7740 Runs some command, possibly feeding it input and capturing output to the
7741 give files or scalar references. The parameters are :
7743 =item command - Full command to run, possibly including shell meta-characters.
7745 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7747 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7749 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7751 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7753 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7758 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7759 if (&is_readonly_mode() && !$safe) {
7760 print STDERR "Vetoing command $_[0]\n";
7764 $cmd = &translate_command($cmd);
7766 # Use ` operator where possible
7767 if (!$stdin && ref($stdout) && !$stderr) {
7768 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7769 $$stdout = `$cmd 2>$null_file`;
7772 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7773 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7774 $$stdout = `$cmd 2>&1`;
7777 elsif (!$stdin && !$stdout && !$stderr) {
7778 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7779 return system("$cmd >$null_file 2>$null_file <$null_file");
7781 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7784 $| = 1; # needed on some systems to flush before forking
7785 pipe(EXECSTDINr, EXECSTDINw);
7786 pipe(EXECSTDOUTr, EXECSTDOUTw);
7787 pipe(EXECSTDERRr, EXECSTDERRw);
7789 if (!($pid = fork())) {
7793 open(STDIN, "<&EXECSTDINr");
7794 open(STDOUT, ">&EXECSTDOUTw");
7795 if (ref($stderr) && $stderr eq $stdout) {
7796 open(STDERR, ">&EXECSTDOUTw");
7799 open(STDERR, ">&EXECSTDERRw");
7806 my $fullcmd = "($cmd)";
7807 if ($stdin && !ref($stdin)) {
7808 $fullcmd .= " <$stdin";
7810 if ($stdout && !ref($stdout)) {
7811 $fullcmd .= " >$stdout";
7813 if ($stderr && !ref($stderr)) {
7814 if ($stderr eq $stdout) {
7815 $fullcmd .= " 2>&1";
7818 $fullcmd .= " 2>$stderr";
7821 if ($gconfig{'os_type'} eq 'windows') {
7825 exec("/bin/sh", "-c", $fullcmd);
7827 print "Exec failed : $!\n";
7834 # Feed input and capture output
7836 if ($stdin && ref($stdin)) {
7837 print EXECSTDINw $$stdin;
7840 if ($stdout && ref($stdout)) {
7842 while(<EXECSTDOUTr>) {
7847 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7849 while(<EXECSTDERRr>) {
7860 =head2 open_readfile(handle, file)
7862 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7863 exactly the same as Perl's open function.
7868 my ($fh, $file) = @_;
7869 $fh = &callers_package($fh);
7870 my $realfile = &translate_filename($file);
7871 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7872 return open($fh, "<".$realfile);
7875 =head2 open_execute_command(handle, command, output?, safe?)
7877 Runs some command, with the specified file handle set to either write to it if
7878 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7879 indicates if the command modifies the state of the system or not.
7882 sub open_execute_command
7884 my ($fh, $cmd, $mode, $safe) = @_;
7885 $fh = &callers_package($fh);
7886 my $realcmd = &translate_command($cmd);
7887 if (&is_readonly_mode() && !$safe) {
7888 # Don't actually run it
7889 print STDERR "vetoing command $cmd\n";
7892 return open($fh, ">$null_file");
7895 return open($fh, $null_file);
7899 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7900 if ($gconfig{'debug_what_cmd'});
7902 return open($fh, "| $cmd");
7904 elsif ($mode == 1) {
7905 return open($fh, "$cmd 2>$null_file |");
7907 elsif ($mode == 2) {
7908 return open($fh, "$cmd 2>&1 |");
7912 =head2 translate_filename(filename)
7914 Applies all relevant registered translation functions to a filename. Mostly
7915 for internal use, and typically does nothing.
7918 sub translate_filename
7920 my ($realfile) = @_;
7921 my @funcs = grep { $_->[0] eq &get_module_name() ||
7922 !defined($_->[0]) } @main::filename_callbacks;
7923 foreach my $f (@funcs) {
7925 $realfile = &$func($realfile, @{$f->[2]});
7930 =head2 translate_command(filename)
7932 Applies all relevant registered translation functions to a command. Mostly
7933 for internal use, and typically does nothing.
7936 sub translate_command
7939 my @funcs = grep { $_->[0] eq &get_module_name() ||
7940 !defined($_->[0]) } @main::command_callbacks;
7941 foreach my $f (@funcs) {
7943 $realcmd = &$func($realcmd, @{$f->[2]});
7948 =head2 register_filename_callback(module|undef, &function, &args)
7950 Registers some function to be called when the specified module (or all
7951 modules) tries to open a file for reading and writing. The function must
7952 return the actual file to open. This allows you to override which files
7953 other code actually operates on, via the translate_filename function.
7956 sub register_filename_callback
7958 my ($mod, $func, $args) = @_;
7959 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7962 =head2 register_command_callback(module|undef, &function, &args)
7964 Registers some function to be called when the specified module (or all
7965 modules) tries to execute a command. The function must return the actual
7966 command to run. This allows you to override which commands other other code
7967 actually runs, via the translate_command function.
7970 sub register_command_callback
7972 my ($mod, $func, $args) = @_;
7973 push(@main::command_callbacks, [ $mod, $func, $args ]);
7976 =head2 capture_function_output(&function, arg, ...)
7978 Captures output that some function prints to STDOUT, and returns it. Useful
7979 for functions outside your control that print data when you really want to
7980 manipulate it before output.
7983 sub capture_function_output
7985 my ($func, @args) = @_;
7986 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
7987 my $old = select(SOCKET1);
7988 my @rv = &$func(@args);
7997 return wantarray ? ($out, \@rv) : $out;
8000 =head2 capture_function_output_tempfile(&function, arg, ...)
8002 Behaves the same as capture_function_output, but uses a temporary file
8003 to avoid buffer full problems.
8006 sub capture_function_output_tempfile
8008 my ($func, @args) = @_;
8009 my $temp = &transname();
8010 open(BUFFER, ">$temp");
8011 my $old = select(BUFFER);
8012 my @rv = &$func(@args);
8015 my $out = &read_file_contents($temp);
8016 &unlink_file($temp);
8017 return wantarray ? ($out, \@rv) : $out;
8020 =head2 modules_chooser_button(field, multiple, [form])
8022 Returns HTML for a button for selecting one or many Webmin modules.
8023 field - Name of the HTML field to place the module names into.
8024 multiple - Set to 1 if multiple modules can be selected.
8025 form - Index of the form on the page.
8028 sub modules_chooser_button
8030 return &theme_modules_chooser_button(@_)
8031 if (defined(&theme_modules_chooser_button));
8032 my $form = defined($_[2]) ? $_[2] : 0;
8033 my $w = $_[1] ? 700 : 500;
8035 if ($_[1] && $gconfig{'db_sizemodules'}) {
8036 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8038 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8039 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8041 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";
8044 =head2 substitute_template(text, &hash)
8046 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8047 the text replaces it with the value of the hash key foo. Also supports blocks
8048 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8049 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8052 sub substitute_template
8054 # Add some extra fixed parameters to the hash
8055 my %hash = %{$_[1]};
8056 $hash{'hostname'} = &get_system_hostname();
8057 $hash{'webmin_config'} = $config_directory;
8058 $hash{'webmin_etc'} = $config_directory;
8059 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8060 $hash{'webmin_var'} = $var_directory;
8062 # Add time-based parameters, for use in DNS
8063 $hash{'current_time'} = time();
8064 my @tm = localtime($hash{'current_time'});
8065 $hash{'current_year'} = $tm[5]+1900;
8066 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8067 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8068 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8069 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8070 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8072 # Actually do the substition
8074 foreach my $s (keys %hash) {
8075 next if ($s eq ''); # Prevent just $ from being subbed
8078 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8079 $rv =~ s/\$\Q$us\E/$sv/g;
8081 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8082 # and ${IF}..${ENDIF} with value
8083 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8084 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8086 # Replace $IF..$ELSE..$ENDIF block with first value,
8087 # and $IF..$ENDIF with value
8088 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8089 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8091 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8092 # matching, nothing if not
8093 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8094 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8096 # Replace $IFEQ..$ENDIFEQ block with first value if
8097 # matching, nothing if not
8098 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8099 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8102 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8103 # and ${IF}..${ENDIF} with nothing
8104 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8105 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8107 # Replace $IF..$ELSE..$ENDIF block with second value,
8108 # and $IF..$ENDIF with nothing
8109 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8110 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8112 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8113 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8114 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8118 # Now assume any $IF blocks whose variables are not present in the hash
8119 # evaluate to false.
8120 # $IF...$ELSE x $ENDIF => x
8121 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8122 # $IF...x...$ENDIF => (nothing)
8123 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8124 # ${var} => (nothing)
8125 $rv =~ s/\$\{[A-Z]+\}//g;
8130 =head2 running_in_zone
8132 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8133 disable module and features that are not appropriate, like those that modify
8134 mounted filesystems.
8139 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8140 $gconfig{'os_version'} < 10);
8141 my $zn = `zonename 2>$null_file`;
8143 return $zn && $zn ne "global";
8146 =head2 running_in_vserver
8148 Returns 1 if the current Webmin instance is running in a Linux VServer.
8149 Used to disable modules and features that are not appropriate.
8152 sub running_in_vserver
8154 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8157 open(MTAB, "/etc/mtab");
8159 my ($dev, $mp) = split(/\s+/, $_);
8160 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8169 =head2 running_in_xen
8171 Returns 1 if Webmin is running inside a Xen instance, by looking
8172 at /proc/xen/capabilities.
8177 return 0 if (!-r "/proc/xen/capabilities");
8178 my $cap = &read_file_contents("/proc/xen/capabilities");
8179 return $cap =~ /control_d/ ? 0 : 1;
8182 =head2 running_in_openvz
8184 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8185 at /proc/vz/veinfo for a non-zero line.
8188 sub running_in_openvz
8190 return 0 if (!-r "/proc/vz/veinfo");
8191 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8192 return 0 if (!$lref || !@$lref);
8193 foreach my $l (@$lref) {
8195 my @ll = split(/\s+/, $l);
8196 return 0 if ($ll[0] eq '0');
8201 =head2 list_categories(&modules, [include-empty])
8203 Returns a hash mapping category codes to names, including any custom-defined
8204 categories. The modules parameter must be an array ref of module hash objects,
8205 as returned by get_all_module_infos.
8210 my ($mods, $empty) = @_;
8211 my (%cats, %catnames);
8212 &read_file("$config_directory/webmin.catnames", \%catnames);
8213 foreach my $o (@lang_order_list) {
8214 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8219 foreach my $m (@$mods) {
8220 my $c = $m->{'category'};
8221 next if ($cats{$c});
8222 if (defined($catnames{$c})) {
8223 $cats{$c} = $catnames{$c};
8225 elsif ($text{"category_$c"}) {
8226 $cats{$c} = $text{"category_$c"};
8229 # try to get category name from module ..
8230 my %mtext = &load_language($m->{'dir'});
8231 if ($mtext{"category_$c"}) {
8232 $cats{$c} = $mtext{"category_$c"};
8235 $c = $m->{'category'} = "";
8236 $cats{$c} = $text{"category_$c"};
8243 =head2 is_readonly_mode
8245 Returns 1 if the current user is in read-only mode, and thus all writes
8246 to files and command execution should fail.
8249 sub is_readonly_mode
8251 if (!defined($main::readonly_mode_cache)) {
8252 my %gaccess = &get_module_acl(undef, "");
8253 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8255 return $main::readonly_mode_cache;
8258 =head2 command_as_user(user, with-env?, command, ...)
8260 Returns a command to execute some command as the given user, using the
8261 su statement. If on Linux, the /bin/sh shell is forced in case the user
8262 does not have a valid shell. If with-env is set to 1, the -s flag is added
8263 to the su command to read the user's .profile or .bashrc file.
8268 my ($user, $env, @args) = @_;
8269 my @uinfo = getpwnam($user);
8270 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8271 # User shell doesn't appear to be valid
8272 if ($gconfig{'os_type'} =~ /-linux$/) {
8273 # Use -s /bin/sh to force it
8274 $shellarg = " -s /bin/sh";
8276 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8277 $gconfig{'os_type'} eq 'solaris' &&
8278 $gconfig{'os_version'} >= 11 ||
8279 $gconfig{'os_type'} eq 'macos') {
8280 # Use -m and force /bin/sh
8281 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8285 my $rv = "su".($env ? " -" : "").$shellarg.
8286 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8290 =head2 list_osdn_mirrors(project, file)
8292 This function is now deprecated in favor of letting sourceforge just
8293 redirect to the best mirror, and now just returns their primary download URL.
8296 sub list_osdn_mirrors
8298 my ($project, $file) = @_;
8299 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8301 'mirror' => 'downloads' } );
8304 =head2 convert_osdn_url(url)
8306 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8307 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8308 to a real URL on the sourceforge download redirector.
8311 sub convert_osdn_url
8314 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8315 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8316 # Always use the Sourceforge mail download URL, which does
8317 # a location-based redirect for us
8318 my ($project, $file) = ($1, $2);
8319 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8321 return wantarray ? ( $url, 0 ) : $url;
8324 # Some other source .. don't change
8325 return wantarray ? ( $url, 2 ) : $url;
8329 =head2 get_current_dir
8331 Returns the directory the current process is running in.
8337 if ($gconfig{'os_type'} eq 'windows') {
8350 =head2 supports_users
8352 Returns 1 if the current OS supports Unix user concepts and functions like
8353 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8359 return $gconfig{'os_type'} ne 'windows';
8362 =head2 supports_symlinks
8364 Returns 1 if the current OS supports symbolic and hard links. This will not
8365 be the case on Windows.
8368 sub supports_symlinks
8370 return $gconfig{'os_type'} ne 'windows';
8373 =head2 quote_path(path)
8375 Returns a path with safe quoting for the current operating system.
8381 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8382 # Windows only supports "" style quoting
8386 return quotemeta($path);
8390 =head2 get_windows_root
8392 Returns the base windows system directory, like c:/windows.
8395 sub get_windows_root
8397 if ($ENV{'SystemRoot'}) {
8398 my $rv = $ENV{'SystemRoot'};
8403 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8407 =head2 read_file_contents(file)
8409 Given a filename, returns its complete contents as a string. Effectively
8410 the same as the Perl construct `cat file`.
8413 sub read_file_contents
8415 &open_readfile(FILE, $_[0]) || return undef;
8422 =head2 unix_crypt(password, salt)
8424 Performs Unix encryption on a password, using the built-in crypt function or
8425 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8426 must be either an already-hashed password, or a two-character alpha-numeric
8432 my ($pass, $salt) = @_;
8433 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8434 my $rv = eval "crypt(\$pass, \$salt)";
8436 return $rv if ($rv && !$@);
8437 eval "use Crypt::UnixCrypt";
8439 return Crypt::UnixCrypt::crypt($pass, $salt);
8442 &error("Failed to encrypt password : $err");
8446 =head2 split_quoted_string(string)
8448 Given a string like I<foo "bar baz" quux>, returns the array :
8452 sub split_quoted_string
8456 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8457 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8458 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8465 =head2 write_to_http_cache(url, file|&data)
8467 Updates the Webmin cache with the contents of the given file, possibly also
8468 clearing out old data. Mainly for internal use by http_download.
8471 sub write_to_http_cache
8473 my ($url, $file) = @_;
8474 return 0 if (!$gconfig{'cache_size'});
8476 # Don't cache downloads that look dynamic
8477 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8481 # Check if the current module should do caching
8482 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8483 # Caching all except some modules
8484 my @mods = split(/\s+/, $1);
8485 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8487 elsif ($gconfig{'cache_mods'}) {
8488 # Only caching some modules
8489 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8490 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8496 $size = length($$file);
8499 my @st = stat($file);
8503 if ($size > $gconfig{'cache_size'}) {
8504 # Bigger than the whole cache - so don't save it
8509 $cfile = "$main::http_cache_directory/$cfile";
8511 # See how much we have cached currently, clearing old files
8513 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8514 opendir(CACHEDIR, $main::http_cache_directory);
8515 foreach my $f (readdir(CACHEDIR)) {
8516 next if ($f eq "." || $f eq "..");
8517 my $path = "$main::http_cache_directory/$f";
8518 my @st = stat($path);
8519 if ($gconfig{'cache_days'} &&
8520 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8521 # This file is too old .. trash it
8526 push(@cached, [ $path, $st[7], $st[9] ]);
8530 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8531 while($total+$size > $gconfig{'cache_size'} && @cached) {
8532 # Cache is too big .. delete some files until the new one will fit
8533 unlink($cached[0]->[0]);
8534 $total -= $cached[0]->[1];
8538 # Finally, write out the new file
8540 &open_tempfile(CACHEFILE, ">$cfile");
8541 &print_tempfile(CACHEFILE, $$file);
8542 &close_tempfile(CACHEFILE);
8545 my ($ok, $err) = ©_source_dest($file, $cfile);
8551 =head2 check_in_http_cache(url)
8553 If some URL is in the cache and valid, return the filename for it. Mainly
8554 for internal use by http_download.
8557 sub check_in_http_cache
8560 return undef if (!$gconfig{'cache_size'});
8562 # Check if the current module should do caching
8563 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8564 # Caching all except some modules
8565 my @mods = split(/\s+/, $1);
8566 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8568 elsif ($gconfig{'cache_mods'}) {
8569 # Only caching some modules
8570 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8571 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8576 $cfile = "$main::http_cache_directory/$cfile";
8577 my @st = stat($cfile);
8578 return undef if (!@st || !$st[7]);
8579 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8584 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8589 =head2 supports_javascript
8591 Returns 1 if the current browser is assumed to support javascript.
8594 sub supports_javascript
8596 if (defined(&theme_supports_javascript)) {
8597 return &theme_supports_javascript();
8599 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8602 =head2 get_module_name
8604 Returns the name of the Webmin module that called this function. For internal
8605 use only by other API functions.
8610 return &get_module_variable('$module_name');
8613 =head2 get_module_variable(name, [ref])
8615 Returns the value of some variable which is set in the caller's context, if
8616 using the new WebminCore package. For internal use only.
8619 sub get_module_variable
8621 my ($v, $wantref) = @_;
8622 my $slash = $wantref ? "\\" : "";
8623 my $thispkg = &web_libs_package();
8624 if ($thispkg eq 'WebminCore') {
8625 my ($vt, $vn) = split('', $v, 2);
8627 for(my $i=0; ($callpkg) = caller($i); $i++) {
8628 last if ($callpkg ne $thispkg);
8630 return eval "${slash}${vt}${callpkg}::${vn}";
8632 return eval "${slash}${v}";
8635 =head2 clear_time_locale()
8637 Temporarily force the locale to C, until reset_time_locale is called. This is
8638 useful if your code is going to call C<strftime> from the POSIX package, and
8639 you want to ensure that the output is in a consistent format.
8642 sub clear_time_locale
8644 if ($main::clear_time_locale_count == 0) {
8647 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8648 POSIX::setlocale(POSIX::LC_TIME, "C");
8651 $main::clear_time_locale_count++;
8654 =head2 reset_time_locale()
8656 Revert the locale to whatever it was before clear_time_locale was called
8659 sub reset_time_locale
8661 if ($main::clear_time_locale_count == 1) {
8663 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8664 $main::clear_time_locale_old = undef;
8667 $main::clear_time_locale_count--;
8670 =head2 callers_package(filehandle)
8672 Convert a non-module filehandle like FOO to one qualified with the
8673 caller's caller's package, like fsdump::FOO. For internal use only.
8679 my $callpkg = (caller(1))[0];
8680 my $thispkg = &web_libs_package();
8681 if (!ref($fh) && $fh !~ /::/ &&
8682 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8683 $fh = $callpkg."::".$fh;
8688 =head2 web_libs_package()
8690 Returns the package this code is in. We can't always trust __PACKAGE__. For
8694 sub web_libs_package
8696 if ($called_from_webmin_core) {
8697 return "WebminCore";
8702 $done_web_lib_funcs = 1;