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';
18 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
19 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
20 %done_foreign_require $webmin_feedback_address
21 $user_skill_level $pragma_no_cache $foreign_args);
23 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
25 Fill the given hash reference with name=value pairs from a file. The required
28 =item file - The file to head, which must be text with each line like name=value
30 =item hash - The hash reference to add values read from the file to.
32 =item order - If given, an array reference to add names to in the order they were read
34 =item lowercase - If set to 1, names are converted to lower case
36 =item split-char - If set, names and values are split on this character instead of =
42 my $split = defined($_[4]) ? $_[4] : "=";
43 my $realfile = &translate_filename($_[0]);
44 &open_readfile(ARFILE, $_[0]) || return 0;
47 my $hash = index($_, "#");
48 my $eq = index($_, $split);
49 if ($hash != 0 && $eq >= 0) {
50 my $n = substr($_, 0, $eq);
51 my $v = substr($_, $eq+1);
53 $_[1]->{$_[3] ? lc($n) : $n} = $v;
54 push(@{$_[2]}, $n) if ($_[2]);
58 $main::read_file_missing{$realfile} = 0; # It exists now
59 if (defined($main::read_file_cache{$realfile})) {
60 %{$main::read_file_cache{$realfile}} = %{$_[1]};
65 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
67 Like read_file, but reads from an in-memory cache if the file has already been
68 read in this Webmin script. Recommended, as it behaves exactly the same as
69 read_file, but can be much faster.
74 my $realfile = &translate_filename($_[0]);
75 if (defined($main::read_file_cache{$realfile})) {
77 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
80 elsif ($main::read_file_missing{$realfile}) {
81 # Doesn't exist, so don't re-try read
85 # Actually read the file
87 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
88 %{$main::read_file_cache{$realfile}} = %d;
89 %{$_[1]} = ( %{$_[1]}, %d );
93 # Flag as non-existant
94 $main::read_file_missing{$realfile} = 1;
100 =head2 write_file(file, &hash, [join-char])
102 Write out the contents of a hash as name=value lines. The parameters are :
104 =item file - Full path to write to
106 =item hash - A hash reference containing names and values to output
108 =item join-char - If given, names and values are separated by this instead of =
114 my $join = defined($_[2]) ? $_[2] : "=";
115 my $realfile = &translate_filename($_[0]);
116 &read_file($_[0], \%old, \@order);
117 &open_tempfile(ARFILE, ">$_[0]");
118 foreach $k (@order) {
119 if (exists($_[1]->{$k})) {
120 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
121 &error(&text("efilewrite", $realfile, $!));
124 foreach $k (keys %{$_[1]}) {
125 if (!exists($old{$k})) {
126 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
127 &error(&text("efilewrite", $realfile, $!));
130 &close_tempfile(ARFILE);
131 if (defined($main::read_file_cache{$realfile})) {
132 %{$main::read_file_cache{$realfile}} = %{$_[1]};
134 if (defined($main::read_file_missing{$realfile})) {
135 $main::read_file_missing{$realfile} = 0;
139 =head2 html_escape(string)
141 Converts &, < and > codes in text to HTML entities, and returns the new string.
142 This should be used when including data read from other sources in HTML pages.
151 $tmp =~ s/\"/"/g;
152 $tmp =~ s/\'/'/g;
157 =head2 quote_escape(string, [only-quote])
159 Converts ' and " characters in a string into HTML entities, and returns it.
160 Useful for outputing HTML tag values.
165 my ($tmp, $only) = @_;
166 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
167 # convert &, unless it is part of &#nnn; or &foo;
168 $tmp =~ s/&([^#])/&$1/g;
170 $tmp =~ s/&$/&/g;
171 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
172 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
176 =head2 tempname([filename])
178 Returns a mostly random temporary file name, typically under the /tmp/.webmin
179 directory. If filename is given, this will be the base name used. Otherwise
180 a unique name is selected randomly.
185 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
186 $gconfig{'tempdir_'.&get_module_name()} :
187 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
188 $ENV{'TEMP'} ? $ENV{'TEMP'} :
189 $ENV{'TMP'} ? $ENV{'TMP'} :
190 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
191 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
192 "$remote_user_info[7]/.tmp" :
193 @remote_user_info ? $tmp_base."-".$remote_user :
194 $< != 0 ? $tmp_base."-".getpwuid($<) :
196 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
197 # On Windows system, just create temp dir if missing
199 mkdir($tmp_dir, 0755) ||
200 &error("Failed to create temp directory $tmp_dir : $!");
204 # On Unix systems, need to make sure temp dir is valid
206 while($tries++ < 10) {
207 my @st = lstat($tmp_dir);
208 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
210 unlink($tmp_dir) || rmdir($tmp_dir) ||
211 system("/bin/rm -rf ".quotemeta($tmp_dir));
213 mkdir($tmp_dir, 0755) || next;
214 chown($<, $(, $tmp_dir);
215 chmod(0755, $tmp_dir);
218 my @st = lstat($tmp_dir);
219 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
223 if (defined($_[0]) && $_[0] !~ /\.\./) {
224 $rv = "$tmp_dir/$_[0]";
227 $main::tempfilecount++;
229 $rv = $tmp_dir."/".int(rand(1000000))."_".
230 $main::tempfilecount."_".$scriptname;
235 =head2 transname([filename])
237 Behaves exactly like tempname, but records the temp file for deletion when the
238 current Webmin script process exits.
243 my $rv = &tempname(@_);
244 push(@main::temporary_files, $rv);
248 =head2 trunc(string, maxlen)
250 Truncates a string to the shortest whole word less than or equal to the
251 given width. Useful for word wrapping.
256 if (length($_[0]) <= $_[1]) {
259 my $str = substr($_[0],0,$_[1]);
268 =head2 indexof(string, value, ...)
270 Returns the index of some value in an array of values, or -1 if it was not
276 for(my $i=1; $i <= $#_; $i++) {
277 if ($_[$i] eq $_[0]) { return $i - 1; }
282 =head2 indexoflc(string, value, ...)
284 Like indexof, but does a case-insensitive match
289 my $str = lc(shift(@_));
290 my @arr = map { lc($_) } @_;
291 return &indexof($str, @arr);
294 =head2 sysprint(handle, [string]+)
296 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
297 as a replacement for print when writing to pipes or sockets.
302 my $fh = &callers_package($_[0]);
303 my $str = join('', @_[1..$#_]);
304 syswrite $fh, $str, length($str);
307 =head2 check_ipaddress(ip)
309 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
314 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
315 $1 >= 0 && $1 <= 255 &&
316 $2 >= 0 && $2 <= 255 &&
317 $3 >= 0 && $3 <= 255 &&
318 $4 >= 0 && $4 <= 255;
321 =head2 check_ip6address(ip)
323 Check if some IPv6 address is properly formatted, and returns 1 if so.
328 my @blocks = split(/:/, $_[0]);
329 return 0 if (@blocks == 0 || @blocks > 8);
331 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
332 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
333 # value is in [0;128].
335 my $where = index($blocks[$ib],"/");
338 my $b = substr($blocks[$ib],0,$where);
339 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
343 # The netmask must take its value in [0;128]
344 return 0 if ($m <0 || $m >128);
346 # Check the different blocks of the address : 16 bits block in hexa notation.
347 # Possibility of 1 empty block or 2 if the address begins with "::".
350 foreach $b (@blocks) {
351 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
352 $empty++ if ($b eq "");
354 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
360 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
362 Prints HTML for an icon image. The parameters are :
364 =item image - URL for the image, like images/foo.gif
366 =item title - Text to appear under the icon
368 =item link - Optional destination for the icon's link
370 =item href - Other HTML attributes to be added to the <a href> for the link
372 =item width - Optional width of the icon
374 =item height - Optional height of the icon
376 =item before-title - HTML to appear before the title link, but which is not actually in the link
378 =item after-title - HTML to appear after the title link, but which is not actually in the link
383 &load_theme_library();
384 if (defined(&theme_generate_icon)) {
385 &theme_generate_icon(@_);
388 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
389 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
390 if ($tconfig{'noicons'}) {
392 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
395 print "$_[6]$_[1]$_[7]\n";
399 print "<table border><tr><td width=48 height=48>\n",
400 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
401 "$w $h></a></td></tr></table>\n";
402 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
405 print "<table border><tr><td width=48 height=48>\n",
406 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
407 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
413 Converts a string to a form ok for putting in a URL, using % escaping.
419 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
423 =head2 un_urlize(string)
425 Converts a URL-encoded string to it's original contents - the reverse of the
433 $rv =~ s/%(..)/pack("c",hex($1))/ge;
437 =head2 include(filename)
439 Read and output the contents of the given file.
445 open(INCLUDE, &translate_filename($_[0])) || return 0;
453 =head2 copydata(in-handle, out-handle)
455 Read from one file handle and write to another, until there is no more to read.
461 $in = &callers_package($in);
462 $out = &callers_package($out);
464 while(read($in, $buf, 1024) > 0) {
465 (print $out $buf) || return 0;
470 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
472 Read data submitted via a POST request using the multipart/form-data coding,
473 and store it in the global %in hash. The optional parameters are :
475 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
477 =item cbfunc - A function reference to call after reading each block of data.
479 =item cbargs - Additional parameters to the callback function.
484 my ($max, $cbfunc, $cbargs) = @_;
485 my ($boundary, $line, $foo, $name, $got, $file);
486 my $err = &text('readparse_max', $max);
487 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
488 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
491 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
493 <STDIN>; # skip first boundary
496 # Read section headers
500 $got += length($line);
501 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
502 if ($max && $got > $max) {
507 if ($line =~ /^(\S+):\s*(.*)$/) {
508 $header{$lastheader = lc($1)} = $2;
510 elsif ($line =~ /^\s+(.*)$/) {
511 $header{$lastheader} .= $line;
515 # Parse out filename and type
516 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
518 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
523 $foo = $name . "_$1";
530 &error($text{'readparse_cdheader'});
532 if ($header{'content-type'} =~ /^([^\s;]+)/) {
533 $foo = $name . "_content_type";
536 $file = $in{$name."_filename"};
539 $in{$name} .= "\0" if (defined($in{$name}));
542 $got += length($line);
543 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
545 if ($max && $got > $max) {
546 #print STDERR "over limit of $max\n";
551 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
556 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
557 if (index($line, $boundary) != -1) { last; }
560 chop($in{$name}); chop($in{$name});
561 if (index($line,"$boundary--") != -1) { last; }
563 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
566 =head2 ReadParse([&hash], [method], [noplus])
568 Fills the given hash reference with CGI parameters, or uses the global hash
569 %in if none is given. Also sets the global variables $in and @in. The other
572 =item method - For use of this HTTP method, such as GET
574 =item noplus - Don't convert + in parameters to spaces.
579 my $a = $_[0] || \%in;
581 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
583 if ($meth eq 'POST') {
584 my $clen = $ENV{'CONTENT_LENGTH'};
585 &read_fully(STDIN, \$in, $clen) == $clen ||
586 &error("Failed to read POST input : $!");
588 if ($ENV{'QUERY_STRING'}) {
589 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
590 else { $in = $ENV{'QUERY_STRING'}; }
592 @in = split(/\&/, $in);
593 foreach my $i (@in) {
594 my ($k, $v) = split(/=/, $i, 2);
599 $k =~ s/%(..)/pack("c",hex($1))/ge;
600 $v =~ s/%(..)/pack("c",hex($1))/ge;
601 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
605 =head2 read_fully(fh, &buffer, length)
607 Read data from some file handle up to the given length, even in the face
608 of partial reads. Reads the number of bytes read. Stores received data in the
609 string pointed to be the buffer reference.
614 my ($fh, $buf, $len) = @_;
615 $fh = &callers_package($fh);
618 my $r = read(STDIN, $$buf, $len-$got, $got);
625 =head2 read_parse_mime_callback(size, totalsize, upload-id)
627 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
628 the file on every 1% change though. For internal use by the upload progress
632 sub read_parse_mime_callback
634 my ($size, $totalsize, $filename, $id) = @_;
635 return if ($gconfig{'no_upload_tracker'});
638 # Create the upload tracking directory - if running as non-root, this has to
639 # be under the user's home
642 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
643 $vardir = "$uinfo[7]/.tmp";
646 $vardir = $ENV{'WEBMIN_VAR'};
649 &make_dir($vardir, 0755);
652 # Remove any upload.* files more than 1 hour old
653 if (!$main::read_parse_mime_callback_flushed) {
655 opendir(UPDIR, $vardir);
656 foreach my $f (readdir(UPDIR)) {
657 next if ($f !~ /^upload\./);
658 my @st = stat("$vardir/$f");
659 if ($st[9] < $now-3600) {
660 unlink("$vardir/$f");
664 $main::read_parse_mime_callback_flushed++;
667 # Only update file once per percent
668 my $upfile = "$vardir/upload.$id";
669 if ($totalsize && $size >= 0) {
670 my $pc = int(100 * $size / $totalsize);
671 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
674 $main::read_parse_mime_callback_pc{$upfile} = $pc;
678 &open_tempfile(UPFILE, ">$upfile");
679 print UPFILE $size,"\n";
680 print UPFILE $totalsize,"\n";
681 print UPFILE $filename,"\n";
682 &close_tempfile(UPFILE);
685 =head2 read_parse_mime_javascript(upload-id, [&fields])
687 Returns an onSubmit= Javascript statement to popup a window for tracking
688 an upload with the given ID. For internal use by the upload progress tracker.
691 sub read_parse_mime_javascript
693 my ($id, $fields) = @_;
694 return "" if ($gconfig{'no_upload_tracker'});
695 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
697 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
698 return "onSubmit='if ($if) { $opener }'";
701 return "onSubmit='$opener'";
705 =head2 PrintHeader(charset)
707 Outputs the HTTP headers for an HTML page. The optional charset parameter
708 can be used to set a character set. Normally this function is not called
709 directly, but is rather called by ui_print_header or header.
714 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
715 print "pragma: no-cache\n";
716 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
717 print "Cache-Control: no-store, no-cache, must-revalidate\n";
718 print "Cache-Control: post-check=0, pre-check=0\n";
720 if (defined($_[0])) {
721 print "Content-type: text/html; Charset=$_[0]\n\n";
724 print "Content-type: text/html\n\n";
728 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
730 Outputs a Webmin HTML page header with a title, including HTTP headers. The
733 =item title - The text to show at the top of the page
735 =item image - An image to show instead of the title text. This is typically left blank.
737 =item help - If set, this is the name of a help page that will be linked to in the title.
739 =item config - If set to 1, the title will contain a link to the module's config page.
741 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
743 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
745 =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.
747 =item head-stuff - HTML to be included in the <head> section of the page.
749 =item body-stuff - HTML attributes to be include in the <body> tag.
751 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
756 return if ($main::done_webmin_header++);
758 my $charset = defined($main::force_charset) ? $main::force_charset
760 &PrintHeader($charset);
761 &load_theme_library();
762 if (defined(&theme_header)) {
763 $module_name = &get_module_name();
767 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
770 if (defined(&theme_prehead)) {
774 print "<meta http-equiv=\"Content-Type\" ",
775 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
778 my $title = &get_html_title($_[0]);
779 print "<title>$title</title>\n";
780 print $_[7] if ($_[7]);
781 print &get_html_status_line(0);
783 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
784 if ($tconfig{'headinclude'}) {
786 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
793 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
794 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
795 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
796 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
797 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
798 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
799 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
801 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
803 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
804 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
805 if (defined(&theme_prebody)) {
808 my $hostname = &get_display_hostname();
809 my $version = &get_webmin_version();
810 my $prebody = $tconfig{'prebody'};
812 $prebody =~ s/%HOSTNAME%/$hostname/g;
813 $prebody =~ s/%VERSION%/$version/g;
814 $prebody =~ s/%USER%/$remote_user/g;
815 $prebody =~ s/%OS%/$os_type $os_version/g;
818 if ($tconfig{'prebodyinclude'}) {
820 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
827 print $tconfig{'preheader'};
828 my %this_module_info = &get_module_info(&get_module_name());
829 print "<table class='header' width=100%><tr>\n";
830 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
831 print "<td id='headln1' colspan=3 align=center>\n";
832 print &get_html_status_line(1);
833 print "</td></tr> <tr>\n";
835 print "<td id='headln2l' width=15% valign=top align=left>";
836 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
837 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
838 "$text{'header_servers'}</a><br>\n";
840 if (!$_[5] && !$tconfig{'noindex'}) {
841 my @avail = &get_available_module_infos(1);
842 my $nolo = $ENV{'ANONYMOUS_USER'} ||
843 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
844 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
845 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
847 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
848 "$text{'main_logout'}</a><br>";
850 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
851 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
852 "$text{'main_switch'}</a><br>";
854 elsif (!$gconfig{'gotoone'} || @avail > 1) {
855 print "<a href='$gconfig{'webprefix'}/?cat=",
856 $this_module_info{'category'},
857 "'>$text{'header_webmin'}</a><br>\n";
860 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
861 my $idx = $this_module_info{'index_link'};
862 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
863 my $mt = $module_index_name || $text{'header_module'};
864 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
866 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
867 !$tconfig{'nohelp'}) {
868 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
871 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
872 !$tconfig{'nohelp'}) {
873 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
876 my %access = &get_module_acl();
877 if (!$access{'noconfig'} && !$config{'noprefs'}) {
878 my $cprog = $user_module_config_directory ?
879 "uconfig.cgi" : "config.cgi";
880 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
881 &get_module_name()."\">",
882 $text{'header_config'},"</a><br>\n";
887 # Title is a single image
888 print "<td id='headln2c' align=center width=70%>",
889 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
893 my $ts = defined($tconfig{'titlesize'}) ?
894 $tconfig{'titlesize'} : "+2";
895 print "<td id='headln2c' align=center width=70%>",
896 ($ts ? "<font size=$ts>" : ""),$_[0],
897 ($ts ? "</font>" : "");
898 print "<br>$_[9]\n" if ($_[9]);
901 print "<td id='headln2r' width=15% valign=top align=right>";
903 print "</td></tr></table>\n";
904 print $tconfig{'postheader'};
908 =head2 get_html_title(title)
910 Returns the full string to appear in the HTML <title> block.
917 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
918 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
919 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
920 $title = sprintf "%s : %s on %s (%s %s)\n",
921 $msg, $remote_user, &get_display_hostname(),
922 $os_type, $os_version;
924 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
925 $title = sprintf "%s on %s (%s %s)\n",
926 $remote_user, &get_display_hostname(),
927 $os_type, $os_version;
932 if ($gconfig{'showlogin'} && $remote_user) {
933 $title = $remote_user." : ".$title;
938 =head2 get_html_framed_title
940 Returns the title text for a framed theme main page.
943 sub get_html_framed_title
946 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
947 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
949 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
950 # Alternate title mode requested
951 $title = sprintf "%s on %s (%s %s)\n",
952 $remote_user, &get_display_hostname(),
953 $os_type, $os_version;
956 # Title like 'Webmin x.yy on hostname (Linux 6)'
957 if ($os_version eq "*") {
961 $ostr = "$os_type $os_version";
963 my $host = &get_display_hostname();
964 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
965 &text('main_title', &get_webmin_version(), $host, $ostr);
966 if ($gconfig{'showlogin'}) {
967 $title = $remote_user." : ".$title;
973 =head2 get_html_status_line(text-only)
975 Returns HTML for a script block that sets the status line, or if text-only
976 is set to 1, just return the status line text.
979 sub get_html_status_line
982 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
983 # Disabled in this mode
986 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
987 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
988 my $line = &text('header_statusmsg',
989 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
991 ($ENV{'SSL_USER'} ? " (SSL certified)" :
992 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
993 $text{'programname'},
994 &get_webmin_version(),
995 &get_display_hostname(),
996 $os_type.($os_version eq "*" ? "" :" $os_version"));
1001 $line =~ s/\r|\n//g;
1002 return "<script language=JavaScript type=text/javascript>\n".
1003 "defaultStatus=\""."e_escape($line)."\";\n".
1008 =head2 popup_header([title], [head-stuff], [body-stuff])
1010 Outputs a page header, suitable for a popup window. If no title is given,
1011 absolutely no decorations are output. Also useful in framesets. The parameters
1014 =item title - Title text for the popup window.
1016 =item head-stuff - HTML to appear in the <head> section.
1018 =item body-stuff - HTML attributes to be include in the <body> tag.
1023 return if ($main::done_webmin_header++);
1025 my $charset = defined($main::force_charset) ? $main::force_charset
1027 &PrintHeader($charset);
1028 &load_theme_library();
1029 if (defined(&theme_popup_header)) {
1030 &theme_popup_header(@_);
1033 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1036 if (defined(&theme_popup_prehead)) {
1037 &theme_popup_prehead(@_);
1039 print "<title>$_[0]</title>\n";
1041 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1042 if ($tconfig{'headinclude'}) {
1044 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
1051 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1052 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1053 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1054 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1055 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1056 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1057 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1059 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1060 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1061 if (defined(&theme_popup_prebody)) {
1062 &theme_popup_prebody(@_);
1066 =head2 footer([page, name]+, [noendbody])
1068 Outputs the footer for a Webmin HTML page, possibly with links back to other
1069 pages. The links are specified by pairs of parameters, the first of which is
1070 a link destination, and the second the link text. For example :
1072 footer('/', 'Webmin index', '', 'Module menu');
1077 &load_theme_library();
1078 my %this_module_info = &get_module_info(&get_module_name());
1079 if (defined(&theme_footer)) {
1080 $module_name = &get_module_name(); # Old themes use these
1081 %module_info = %this_module_info;
1085 for(my $i=0; $i+1<@_; $i+=2) {
1087 if ($url ne '/' || !$tconfig{'noindex'}) {
1089 $url = "/?cat=$this_module_info{'category'}";
1091 elsif ($url eq '' && &get_module_name()) {
1092 $url = "/".&get_module_name()."/".
1093 $this_module_info{'index_link'};
1095 elsif ($url =~ /^\?/ && &get_module_name()) {
1096 $url = "/".&get_module_name()."/$url";
1098 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1100 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1105 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1110 my $postbody = $tconfig{'postbody'};
1112 my $hostname = &get_display_hostname();
1113 my $version = &get_webmin_version();
1114 my $os_type = $gconfig{'real_os_type'} ||
1115 $gconfig{'os_type'};
1116 my $os_version = $gconfig{'real_os_version'} ||
1117 $gconfig{'os_version'};
1118 $postbody =~ s/%HOSTNAME%/$hostname/g;
1119 $postbody =~ s/%VERSION%/$version/g;
1120 $postbody =~ s/%USER%/$remote_user/g;
1121 $postbody =~ s/%OS%/$os_type $os_version/g;
1122 print "$postbody\n";
1124 if ($tconfig{'postbodyinclude'}) {
1126 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1132 if (defined(&theme_postbody)) {
1133 &theme_postbody(@_);
1135 print "</body></html>\n";
1141 Outputs html for a footer for a popup window, started by popup_header.
1146 &load_theme_library();
1147 if (defined(&theme_popup_footer)) {
1148 &theme_popup_footer(@_);
1151 print "</body></html>\n";
1154 =head2 load_theme_library
1156 Immediately loads the current theme's theme.pl file. Not generally useful for
1157 most module developers, as this is called automatically by the header function.
1160 sub load_theme_library
1162 return if (!$current_theme || $loaded_theme_library++);
1163 for(my $i=0; $i<@theme_root_directories; $i++) {
1164 if ($theme_configs[$i]->{'functions'}) {
1165 do $theme_root_directories[$i]."/".
1166 $theme_configs[$i]->{'functions'};
1171 =head2 redirect(url)
1173 Output HTTP headers to redirect the browser to some page. The url parameter is
1174 typically a relative URL like index.cgi or list_users.cgi.
1179 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1180 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1181 ":$ENV{'SERVER_PORT'}";
1182 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1183 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1185 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1186 # Absolute URL (like http://...)
1189 elsif ($_[0] =~ /^\//) {
1190 # Absolute path (like /foo/bar.cgi)
1191 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1193 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1194 # Relative URL (like foo.cgi)
1195 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1198 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1200 &load_theme_library();
1201 if (defined(&theme_redirect)) {
1202 $module_name = &get_module_name(); # Old themes use these
1203 %module_info = &get_module_info($module_name);
1204 &theme_redirect($_[0], $url);
1207 print "Location: $url\n\n";
1211 =head2 kill_byname(name, signal)
1213 Finds a process whose command line contains the given name (such as httpd), and
1214 sends some signal to it. The signal can be numeric (like 9) or named
1220 my @pids = &find_byname($_[0]);
1221 return scalar(@pids) if (&is_readonly_mode());
1222 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1223 if ($gconfig{'debug_what_procs'});
1224 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1228 =head2 kill_byname_logged(name, signal)
1230 Like kill_byname, but also logs the killing.
1233 sub kill_byname_logged
1235 my @pids = &find_byname($_[0]);
1236 return scalar(@pids) if (&is_readonly_mode());
1237 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1241 =head2 find_byname(name)
1243 Finds processes searching for the given name in their command lines, and
1244 returns a list of matching PIDs.
1249 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1250 # Linux with /proc filesystem .. use cmdline files, as this is
1251 # faster than forking
1253 opendir(PROCDIR, "/proc");
1254 foreach my $f (readdir(PROCDIR)) {
1255 if ($f eq int($f) && $f != $$) {
1256 my $line = &read_file_contents("/proc/$f/cmdline");
1257 if ($line =~ /$_[0]/) {
1266 if (&foreign_check("proc")) {
1267 # Call the proc module
1268 &foreign_require("proc", "proc-lib.pl");
1269 if (defined(&proc::list_processes)) {
1270 my @procs = &proc::list_processes();
1272 foreach my $p (@procs) {
1273 if ($p->{'args'} =~ /$_[0]/) {
1274 push(@pids, $p->{'pid'});
1277 @pids = grep { $_ != $$ } @pids;
1282 # Fall back to running a command
1284 $cmd = $gconfig{'find_pid_command'};
1285 $cmd =~ s/NAME/"$_[0]"/g;
1286 $cmd = &translate_command($cmd);
1287 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1288 @pids = grep { $_ != $$ } @pids;
1292 =head2 error([message]+)
1294 Display an error message and exit. This should be used by CGI scripts that
1295 encounter a fatal error or invalid user input to notify users of the problem.
1296 If error_setup has been called, the displayed error message will be prefixed
1297 by the message setup using that function.
1302 my $msg = join("", @_);
1303 $msg =~ s/<[^>]*>//g;
1304 if (!$main::error_must_die) {
1305 print STDERR "Error: ",$msg,"\n";
1307 &load_theme_library();
1308 if ($main::error_must_die) {
1309 if ($gconfig{'error_stack'}) {
1310 print STDERR "Error: ",$msg,"\n";
1311 for(my $i=0; my @stack = caller($i); $i++) {
1312 print STDERR "File: $stack[1] Line: $stack[2] ",
1313 "Function: $stack[3]\n";
1318 elsif (!$ENV{'REQUEST_METHOD'}) {
1319 # Show text-only error
1320 print STDERR "$text{'error'}\n";
1321 print STDERR "-----\n";
1322 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1324 print STDERR "-----\n";
1325 if ($gconfig{'error_stack'}) {
1327 print STDERR $text{'error_stack'},"\n";
1328 for(my $i=0; my @stack = caller($i); $i++) {
1329 print STDERR &text('error_stackline',
1330 $stack[1], $stack[2], $stack[3]),"\n";
1335 elsif (defined(&theme_error)) {
1339 &header($text{'error'}, "");
1341 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1343 if ($gconfig{'error_stack'}) {
1345 print "<h3>$text{'error_stack'}</h3>\n";
1347 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1348 "<td><b>$text{'error_line'}</b></td> ",
1349 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1350 for($i=0; my @stack = caller($i); $i++) {
1352 print "<td>$stack[1]</td>\n";
1353 print "<td>$stack[2]</td>\n";
1354 print "<td>$stack[3]</td>\n";
1360 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1361 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1367 &unlock_all_files();
1368 &cleanup_tempnames();
1372 =head2 popup_error([message]+)
1374 This function is almost identical to error, but displays the message with HTML
1375 headers suitable for a popup window.
1380 &load_theme_library();
1381 if ($main::error_must_die) {
1384 elsif (defined(&theme_popup_error)) {
1385 &theme_popup_error(@_);
1388 &popup_header($text{'error'}, "");
1389 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1392 &unlock_all_files();
1393 &cleanup_tempnames();
1397 =head2 error_setup(message)
1399 Registers a message to be prepended to all error messages displayed by the
1405 $main::whatfailed = $_[0];
1408 =head2 wait_for(handle, regexp, regexp, ...)
1410 Reads from the input stream until one of the regexps matches, and returns the
1411 index of the matching regexp, or -1 if input ended before any matched. This is
1412 very useful for parsing the output of interactive programs, and can be used with
1413 a two-way pipe to feed input to a program in response to output matched by
1416 If the matching regexp contains bracketed sub-expressions, their values will
1417 be placed in the global array @matches, indexed starting from 1. You cannot
1418 use the Perl variables $1, $2 and so on to capture matches.
1422 $rv = wait_for($loginfh, "username:");
1424 error("Didn't get username prompt");
1426 print $loginfh "joe\n";
1427 $rv = wait_for($loginfh, "password:");
1429 error("Didn't get password prompt");
1431 print $loginfh "smeg\n";
1436 my ($c, $i, $sw, $rv, $ha);
1437 undef($wait_for_input);
1438 if ($wait_for_debug) {
1439 print STDERR "wait_for(",join(",", @_),")\n";
1441 $ha = &callers_package($_[0]);
1442 if ($wait_for_debug) {
1443 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1448 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1449 " \$wait_for_input .= \$c;\n";
1450 if ($wait_for_debug) {
1451 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1453 for($i=1; $i<@_; $i++) {
1454 $sw = $i>1 ? "elsif" : "if";
1455 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1458 " if (defined(\$hit)) {\n".
1459 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1465 &error("wait_for error : $@\n");
1470 =head2 fast_wait_for(handle, string, string, ...)
1472 This function behaves very similar to wait_for (documented above), but instead
1473 of taking regular expressions as parameters, it takes strings. As soon as the
1474 input contains one of them, it will return the index of the matching string.
1475 If the input ends before any match, it returns -1.
1480 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1481 for($i=1; $i<@_; $i++) {
1482 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1486 if (($c = getc($ha)) eq "") {
1487 &error("fast_wait_for read error : $!");
1490 if (length($inp) > $maxlen) {
1491 $inp = substr($inp, length($inp)-$maxlen);
1493 $inpl = length($inp);
1494 for($i=1; $i<@_; $i++) {
1495 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1502 =head2 has_command(command)
1504 Returns the full path to the executable if some command is in the path, or
1505 undef if not found. If the given command is already an absolute path and
1506 exists, then the same path will be returned.
1511 if (!$_[0]) { return undef; }
1512 if (exists($main::has_command_cache{$_[0]})) {
1513 return $main::has_command_cache{$_[0]};
1516 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1517 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1518 # Absolute path given - just use it
1519 my $t = &translate_filename($_[0]);
1520 $rv = (-x $t && !-d _) ? $_[0] : undef;
1523 # Check each directory in the path
1525 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1526 next if ($donedir{$d}++);
1527 $d =~ s/$slash$// if ($d ne $slash);
1528 my $t = &translate_filename("$d/$_[0]");
1529 if (-x $t && !-d _) {
1530 $rv = $d.$slash.$_[0];
1533 if ($gconfig{'os_type'} eq 'windows') {
1534 foreach my $sfx (".exe", ".com", ".bat") {
1535 my $t = &translate_filename("$d/$_[0]").$sfx;
1536 if (-r $t && !-d _) {
1537 $rv = $d.$slash.$_[0].$sfx;
1544 $main::has_command_cache{$_[0]} = $rv;
1548 =head2 make_date(seconds, [date-only], [fmt])
1550 Converts a Unix date/time in seconds to a human-readable form, by default
1551 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1553 =item seconds - Unix time is seconds to convert.
1555 =item date-only - If set to 1, exclude the time from the returned string.
1557 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1562 my ($secs, $only, $fmt) = @_;
1563 my @tm = localtime($secs);
1566 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1568 if ($fmt eq 'dd/mon/yyyy') {
1569 $date = sprintf "%2.2d/%s/%4.4d",
1570 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1572 elsif ($fmt eq 'dd/mm/yyyy') {
1573 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1575 elsif ($fmt eq 'mm/dd/yyyy') {
1576 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1578 elsif ($fmt eq 'yyyy/mm/dd') {
1579 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1582 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1587 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1589 Return HTML for a button that pops up a file chooser when clicked, and places
1590 the selected filename into another HTML field. The parameters are :
1592 =item input - Name of the form field to store the filename in.
1594 =item type - 0 for file or directory chooser, or 1 for directory only.
1596 =item form - Index of the form containing the button.
1598 =item chroot - If set to 1, the chooser will be limited to this directory.
1600 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1603 sub file_chooser_button
1605 return &theme_file_chooser_button(@_)
1606 if (defined(&theme_file_chooser_button));
1607 my $form = defined($_[2]) ? $_[2] : 0;
1608 my $chroot = defined($_[3]) ? $_[3] : "/";
1609 my $add = int($_[4]);
1610 my ($w, $h) = (400, 300);
1611 if ($gconfig{'db_sizefile'}) {
1612 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1614 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";
1617 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1619 Returns HTML for a button that will popup a chooser window of some kind. The
1622 =item url - Base URL of the popup window's contents
1624 =item width - Width of the window in pixels
1626 =item height - Height in pixels
1628 =item scrollbars - Set to 1 if the window should have scrollbars
1630 The field-mappings parameter is an array ref of array refs containing
1632 =item - Attribute to assign field to in the popup window
1634 =item - Form field name
1636 =item - CGI parameter to URL for value, if any
1639 sub popup_window_button
1641 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1642 my ($url, $w, $h, $scroll, $fields) = @_;
1643 my $scrollyn = $scroll ? "yes" : "no";
1644 my $rv = "<input type=button onClick='";
1645 foreach my $m (@$fields) {
1646 $rv .= "$m->[0] = form.$m->[1]; ";
1648 my $sep = $url =~ /\?/ ? "&" : "?";
1649 $rv .= "chooser = window.open(\"$url\"";
1650 foreach my $m (@$fields) {
1652 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1656 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1657 foreach my $m (@$fields) {
1658 $rv .= "chooser.$m->[0] = $m->[0]; ";
1659 $rv .= "window.$m->[0] = $m->[0]; ";
1661 $rv .= "' value=\"...\">";
1665 =head2 read_acl(&user-module-hash, &user-list-hash)
1667 Reads the Webmin acl file into the given hash references. The first is indexed
1668 by a combined key of username,module , with the value being set to 1 when
1669 the user has access to that module. The second is indexed by username, with
1670 the value being an array ref of allowed modules.
1672 This function is deprecated in favour of foreign_available, which performs a
1673 more comprehensive check of module availability.
1678 if (!defined(%main::acl_hash_cache)) {
1680 open(ACL, &acl_filename());
1682 if (/^([^:]+):\s*(.*)/) {
1684 my @mods = split(/\s+/, $2);
1685 foreach my $m (@mods) {
1686 $main::acl_hash_cache{$user,$m}++;
1688 $main::acl_array_cache{$user} = \@mods;
1693 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1694 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1699 Returns the file containing the webmin ACL, which is usually
1700 /etc/webmin/webmin.acl.
1705 return "$config_directory/webmin.acl";
1710 Does nothing, but kept around for compatability.
1717 =head2 get_miniserv_config(&hash)
1719 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1720 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1724 sub get_miniserv_config
1726 return &read_file_cached(
1727 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1730 =head2 put_miniserv_config(&hash)
1732 Writes out the Webmin webserver configuration file from the contents of
1733 the given hash ref. This should be initially populated by get_miniserv_config,
1736 get_miniserv_config(\%miniserv);
1737 $miniserv{'port'} = 10005;
1738 put_miniserv_config(\%miniserv);
1742 sub put_miniserv_config
1744 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1748 =head2 restart_miniserv([nowait])
1750 Kill the old miniserv process and re-start it, then optionally waits for
1751 it to restart. This will apply all configuration settings.
1754 sub restart_miniserv
1757 return undef if (&is_readonly_mode());
1759 &get_miniserv_config(\%miniserv) || return;
1762 if ($gconfig{'os_type'} ne 'windows') {
1763 # On Unix systems, we can restart with a signal
1764 my ($pid, $addr, $i);
1765 $miniserv{'inetd'} && return;
1766 my @oldst = stat($miniserv{'pidfile'});
1767 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1770 if (!$pid) { &error("Invalid PID file"); }
1772 # Just signal miniserv to restart
1773 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1775 # Wait till new PID is written, indicating a restart
1776 for($i=0; $i<60; $i++) {
1778 my @newst = stat($miniserv{'pidfile'});
1779 last if ($newst[9] != $oldst[9]);
1781 $i < 60 || &error("Webmin server did not write new PID file");
1783 ## Totally kill the process and re-run it
1784 #$SIG{'TERM'} = 'IGNORE';
1785 #&kill_logged('TERM', $pid);
1786 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1789 # On Windows, we need to use the flag file
1790 open(TOUCH, ">$miniserv{'restartflag'}");
1795 # wait for miniserv to come back up
1796 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1798 for($i=0; $i<20; $i++) {
1800 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1801 my $rv = connect(STEST,
1802 pack_sockaddr_in($miniserv{'port'}, $addr));
1804 last if ($rv && ++$ok >= 2);
1806 $i < 20 || &error("Failed to restart Webmin server!");
1810 =head2 reload_miniserv
1812 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1813 configuration files. Not all changes will be applied though, such as the
1814 IP addresses and ports to accept connections on.
1819 return undef if (&is_readonly_mode());
1821 &get_miniserv_config(\%miniserv) || return;
1823 if ($gconfig{'os_type'} ne 'windows') {
1824 # Send a USR1 signal to re-read the config
1825 my ($pid, $addr, $i);
1826 $miniserv{'inetd'} && return;
1827 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1830 if (!$pid) { &error("Invalid PID file"); }
1831 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1833 # Make sure this didn't kill Webmin!
1835 if (!kill(0, $pid)) {
1836 print STDERR "USR1 signal killed Webmin - restarting\n";
1837 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1841 # On Windows, we need to use the flag file
1842 open(TOUCH, ">$miniserv{'reloadflag'}");
1847 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1849 Returns 1 if some module is supported on the current operating system, or the
1850 OS supplies as parameters. The parameters are :
1852 =item minfo - A hash ref of module information, as returned by get_module_info
1854 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1856 =item os-version - The Webmin OS version to use, such as 13.0
1858 =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.
1861 sub check_os_support
1863 my $oss = $_[0]->{'os_support'};
1864 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1865 # May provide usable API
1866 $oss .= " ".$_[0]->{'api_os_support'};
1868 if ($_[0]->{'nozone'} && &running_in_zone()) {
1869 # Not supported in a Solaris Zone
1872 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1873 # Not supported in a Linux vserver
1876 return 1 if (!$oss || $oss eq '*');
1877 my $osver = $_[2] || $gconfig{'os_version'};
1878 my $ostype = $_[1] || $gconfig{'os_type'};
1881 my ($os, $ver, $codes);
1882 my ($neg) = ($oss =~ s/^!//); # starts with !
1883 $anyneg++ if ($neg);
1884 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1886 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1888 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1890 $os = $1; $ver = $2; $oss = $3;
1892 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1894 $os = $1; $codes = $2; $oss = $3;
1896 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1898 $codes = $1; $oss = $2;
1900 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1902 $os = $1; $oss = $2;
1905 next if ($os && !($os eq $ostype ||
1906 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1907 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1908 next if ($osver < $1 || $osver > $2);
1910 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1911 next if ($osver < $1);
1913 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1914 next if ($osver > $1);
1917 next if ($ver ne $osver);
1919 next if ($codes && !eval $codes);
1925 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1927 Downloads data from a HTTP url to a local file or string. The parameters are :
1929 =item host - The hostname part of the URL, such as www.google.com
1931 =item port - The HTTP port number, such as 80
1933 =item page - The filename part of the URL, like /index.html
1935 =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.
1937 =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.
1939 =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.
1941 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
1943 =item user - If set, HTTP authentication is done with this username.
1945 =item pass - The HTTP password to use with the username above.
1947 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
1949 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
1951 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
1953 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
1958 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
1959 $timeout, $osdn, $nocache, $headers) = @_;
1960 if ($gconfig{'debug_what_net'}) {
1961 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
1962 ($user ? " user=$user pass=$pass" : "").
1963 (ref($dest) ? "" : " dest=$dest"));
1966 # Convert OSDN URL first
1967 my $prot = $ssl ? "https://" : "http://";
1968 my $portstr = $ssl && $port == 443 ||
1969 !$ssl && $port == 80 ? "" : ":$port";
1970 ($host, $port, $page, $ssl) = &parse_http_url(
1971 &convert_osdn_url($prot.$host.$portstr.$page));
1974 # Check if we already have cached the URL
1975 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
1976 my $cfile = &check_in_http_cache($url);
1977 if ($cfile && !$nocache) {
1978 # Yes! Copy to dest file or variable
1979 &$cbfunc(6, $url) if ($cbfunc);
1981 &open_readfile(CACHEFILE, $cfile);
1983 $$dest = <CACHEFILE>;
1987 ©_source_dest($cfile, $dest);
1994 push(@headers, [ "Host", $host ]);
1995 push(@headers, [ "User-agent", "Webmin" ]);
1997 my $auth = &encode_base64("$user:$pass");
1998 $auth =~ tr/\r\n//d;
1999 push(@headers, [ "Authorization", "Basic $auth" ]);
2001 foreach my $hname (keys %$headers) {
2002 push(@headers, [ $hname, $headers->{$hname} ]);
2005 # Actually download it
2006 $main::download_timed_out = undef;
2007 local $SIG{ALRM} = \&download_timeout;
2008 alarm($timeout || 60);
2009 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2011 $h = $main::download_timed_out if ($main::download_timed_out);
2013 if ($error) { $$error = $h; return; }
2014 else { &error($h); }
2016 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2018 if ((!$error || !$$error) && !$nocache) {
2019 &write_to_http_cache($url, $dest);
2023 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl])
2025 Do a HTTP download, after the headers have been sent. For internal use only,
2026 typically called by http_download.
2029 sub complete_http_download
2031 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2037 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2038 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2040 if ($_[2]) { ${$_[2]} = $line; return; }
2041 else { &error("Download failed : $line"); }
2044 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2047 $line = &read_http_connection($_[0]);
2048 $line =~ tr/\r\n//d;
2049 $line =~ /^(\S+):\s+(.*)$/ || last;
2050 $header{lc($1)} = $2;
2051 push(@headers, [ lc($1), $2 ]);
2054 if ($main::download_timed_out) {
2055 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2056 else { &error($main::download_timed_out); }
2058 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2059 if ($rcode >= 300 && $rcode < 400) {
2060 # follow the redirect
2061 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2062 my ($host, $port, $page, $ssl);
2063 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2064 $ssl = $1 eq 'https' ? 1 : 0;
2065 $host = $2; $port = $3; $page = $4 || "/";
2067 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2068 $ssl = $1 eq 'https' ? 1 : 0;
2069 $host = $2; $port = 80; $page = $3 || "/";
2071 elsif ($header{'location'} =~ /^\// && $_[5]) {
2072 # Relative to same server
2076 $page = $header{'location'};
2078 elsif ($header{'location'}) {
2079 # Assume relative to same dir .. not handled
2080 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2081 else { &error("Invalid Location header $header{'location'}"); }
2084 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2085 else { &error("Missing Location header"); }
2088 ($page, $params) = split(/\?/, $page);
2090 $page .= "?".$params if (defined($params));
2091 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2092 undef, undef, undef, $_[4], 0, $_[7]);
2097 # Append to a variable
2098 while(defined($buf = &read_http_connection($_[0], 1024))) {
2100 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2106 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2107 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2108 else { &error("Failed to write to $_[1] : $!"); }
2110 binmode(PFILE); # For windows
2111 while(defined($buf = &read_http_connection($_[0], 1024))) {
2112 &print_tempfile(PFILE, $buf);
2113 $got += length($buf);
2114 &$cbfunc(3, $got) if ($cbfunc);
2116 &close_tempfile(PFILE);
2117 if ($header{'content-length'} &&
2118 $got != $header{'content-length'}) {
2119 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2120 else { &error("Download incomplete"); }
2123 &$cbfunc(4) if ($cbfunc);
2125 &close_http_connection($_[0]);
2129 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2131 Download data from an FTP site to a local file. The parameters are :
2133 =item host - FTP server hostname
2135 =item file - File on the FTP server to download
2137 =item destfile - File on the Webmin system to download data to
2139 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2141 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2143 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2145 =item pass - Password for the username above.
2147 =item port - FTP server port number, which defaults to 21 if not set.
2152 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2154 if ($gconfig{'debug_what_net'}) {
2155 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2156 ($user ? " user=$user pass=$pass" : "").
2157 (ref($dest) ? "" : " dest=$dest"));
2161 if (&is_readonly_mode()) {
2162 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2164 else { &error("FTP connections not allowed in readonly mode"); }
2167 # Check if we already have cached the URL
2168 my $url = "ftp://".$host.$file;
2169 my $cfile = &check_in_http_cache($url);
2171 # Yes! Copy to dest file or variable
2172 &$cbfunc(6, $url) if ($cbfunc);
2174 &open_readfile(CACHEFILE, $cfile);
2176 $$dest = <CACHEFILE>;
2180 ©_source_dest($cfile, $dest);
2185 # Actually download it
2186 $main::download_timed_out = undef;
2187 local $SIG{ALRM} = \&download_timeout;
2190 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2191 # download through http-style proxy
2193 if (&open_socket($1, $2, "SOCK", \$error)) {
2195 if ($main::download_timed_out) {
2197 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2198 else { &error($main::download_timed_out); }
2200 my $esc = $_[1]; $esc =~ s/ /%20/g;
2201 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2202 my $portstr = $port == 21 ? "" : ":$port";
2203 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2204 print SOCK "User-agent: Webmin\r\n";
2205 if ($gconfig{'proxy_user'}) {
2206 my $auth = &encode_base64(
2207 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2208 $auth =~ tr/\r\n//d;
2209 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2212 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2215 elsif (!$gconfig{'proxy_fallback'}) {
2217 if ($error) { $$error = $main::download_timed_out; return 0; }
2218 else { &error($main::download_timed_out); }
2223 # connect to host and login with real FTP protocol
2224 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2226 if ($main::download_timed_out) {
2227 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2228 else { &error($main::download_timed_out); }
2230 &ftp_command("", 2, $_[3]) || return 0;
2232 # Login as supplied user
2233 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2235 if (int($urv[1]/100) == 3) {
2236 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2240 # Login as anonymous
2241 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2243 if (int($urv[1]/100) == 3) {
2244 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2248 &$cbfunc(1, 0) if ($cbfunc);
2251 # get the file size and tell the callback
2252 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2253 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2254 defined($size) || return 0;
2256 &$cbfunc(2, int($size));
2260 my $pasv = &ftp_command("PASV", 2, $_[3]);
2261 defined($pasv) || return 0;
2262 $pasv =~ /\(([0-9,]+)\)/;
2263 @n = split(/,/ , $1);
2264 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2265 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2266 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2270 &open_tempfile(PFILE, ">$_[2]", 1);
2271 while(read(CON, $buf, 1024) > 0) {
2272 &print_tempfile(PFILE, $buf);
2273 $got += length($buf);
2274 &$cbfunc(3, $got) if ($cbfunc);
2276 &close_tempfile(PFILE);
2278 if ($got != $size) {
2279 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2280 else { &error("Download incomplete"); }
2282 &$cbfunc(4) if ($cbfunc);
2284 &ftp_command("", 2, $_[3]) || return 0;
2288 &ftp_command("QUIT", 2, $_[3]) || return 0;
2292 &write_to_http_cache($url, $dest);
2296 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2298 Upload data from a local file to an FTP site. The parameters are :
2300 =item host - FTP server hostname
2302 =item file - File on the FTP server to write to
2304 =item srcfile - File on the Webmin system to upload data from
2306 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2308 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2310 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2312 =item pass - Password for the username above.
2314 =item port - FTP server port number, which defaults to 21 if not set.
2321 if (&is_readonly_mode()) {
2322 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2324 else { &error("FTP connections not allowed in readonly mode"); }
2327 $main::download_timed_out = undef;
2328 local $SIG{ALRM} = \&download_timeout;
2331 # connect to host and login
2332 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2334 if ($main::download_timed_out) {
2335 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2336 else { &error($main::download_timed_out); }
2338 &ftp_command("", 2, $_[3]) || return 0;
2340 # Login as supplied user
2341 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2343 if (int($urv[1]/100) == 3) {
2344 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2348 # Login as anonymous
2349 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2351 if (int($urv[1]/100) == 3) {
2352 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2356 &$cbfunc(1, 0) if ($cbfunc);
2358 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2360 # get the file size and tell the callback
2361 my @st = stat($_[2]);
2363 &$cbfunc(2, $st[7]);
2367 my $pasv = &ftp_command("PASV", 2, $_[3]);
2368 defined($pasv) || return 0;
2369 $pasv =~ /\(([0-9,]+)\)/;
2370 @n = split(/,/ , $1);
2371 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2372 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2377 while(read(PFILE, $buf, 1024) > 0) {
2379 $got += length($buf);
2380 &$cbfunc(3, $got) if ($cbfunc);
2384 if ($got != $st[7]) {
2385 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2386 else { &error("Upload incomplete"); }
2388 &$cbfunc(4) if ($cbfunc);
2391 &ftp_command("", 2, $_[3]) || return 0;
2392 &ftp_command("QUIT", 2, $_[3]) || return 0;
2398 =head2 no_proxy(host)
2400 Checks if some host is on the no proxy list. For internal use by the
2401 http_download and ftp_download functions.
2406 my $ip = &to_ipaddress($_[0]);
2407 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2408 return 1 if ($_[0] =~ /\Q$n\E/ ||
2414 =head2 open_socket(host, port, handle, [&error])
2416 Open a TCP connection to some host and port, using a file handle. The
2419 =item host - Hostname or IP address to connect to.
2421 =item port - TCP port number.
2423 =item handle - A file handle name to use for the connection.
2425 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2430 my ($host, $port, $fh, $err) = @_;
2431 $fh = &callers_package($fh);
2433 if ($gconfig{'debug_what_net'}) {
2434 &webmin_debug_log('TCP', "host=$host port=$port");
2436 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2437 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2438 else { &error("Failed to create socket : $!"); }
2441 if (!($addr = inet_aton($host))) {
2442 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2443 else { &error("Failed to lookup IP address for $host"); }
2445 if ($gconfig{'bind_proxy'}) {
2446 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2447 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2448 else { &error("Failed to bind to source address : $!"); }
2451 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2452 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2453 else { &error("Failed to connect to $host:$port : $!"); }
2455 my $old = select($fh); $| =1; select($old);
2459 =head2 download_timeout
2461 Called when a download times out. For internal use only.
2464 sub download_timeout
2466 $main::download_timed_out = "Download timed out";
2469 =head2 ftp_command(command, expected, [&error], [filehandle])
2471 Send an FTP command, and die if the reply is not what was expected. Mainly
2472 for internal use by the ftp_download and ftp_upload functions.
2477 my ($cmd, $expect, $err, $fh) = @_;
2479 $fh = &callers_package($fh);
2482 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2484 print $fh "$cmd\r\n";
2487 if (!($line = <$fh>)) {
2489 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2490 else { &error("Failed to read reply to $what"); }
2492 $line =~ /^(...)(.)(.*)$/;
2495 foreach my $c (@$expect) {
2496 $found++ if (int($1/100) == $c);
2500 $found++ if (int($1/100) == $_[1]);
2504 if ($err) { $$err = "$what failed : $3"; return undef; }
2505 else { &error("$what failed : $3"); }
2510 # Need to skip extra stuff..
2512 if (!($line = <$fh>)) {
2514 if ($$err) { $$err = "Failed to read reply to $what";
2516 else { &error("Failed to read reply to $what"); }
2518 $line =~ /^(....)(.*)$/; $reply .= $2;
2519 if ($1 eq "$rcode ") { last; }
2523 return wantarray ? ($reply, $rcode) : $reply;
2526 =head2 to_ipaddress(hostname)
2528 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2529 it cannot be resolved.
2534 if (&check_ipaddress($_[0])) {
2538 my $hn = gethostbyname($_[0]);
2539 return undef if (!$hn);
2540 local @ip = unpack("CCCC", $hn);
2541 return join("." , @ip);
2545 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2547 Renders a 4-column table of icons. The useful parameters are :
2549 =item links - An array ref of link destination URLs for the icons.
2551 =item titles - An array ref of titles to appear under the icons.
2553 =item icons - An array ref of URLs for icon images.
2555 =item columns - Number of columns to layout the icons with. Defaults to 4.
2560 &load_theme_library();
2561 if (defined(&theme_icons_table)) {
2562 &theme_icons_table(@_);
2566 my $cols = $_[3] ? $_[3] : 4;
2567 my $per = int(100.0 / $cols);
2568 print "<table class='icons_table' width=100% cellpadding=5>\n";
2569 for(my $i=0; $i<@{$_[0]}; $i++) {
2570 if ($i%$cols == 0) { print "<tr>\n"; }
2571 print "<td width=$per% align=center valign=top>\n";
2572 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2573 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2574 $_[7]->[$i], $_[8]->[$i]);
2576 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2578 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2579 print "</tr>\n" if ($need_tr);
2583 =head2 replace_file_line(file, line, [newline]*)
2585 Replaces one line in some file with 0 or more new lines. The parameters are :
2587 =item file - Full path to some file, like /etc/hosts.
2589 =item line - Line number to replace, starting from 0.
2591 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2594 sub replace_file_line
2597 my $realfile = &translate_filename($_[0]);
2598 open(FILE, $realfile);
2601 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2602 else { splice(@lines, $_[1], 1); }
2603 &open_tempfile(FILE, ">$realfile");
2604 &print_tempfile(FILE, @lines);
2605 &close_tempfile(FILE);
2608 =head2 read_file_lines(file, [readonly])
2610 Returns a reference to an array containing the lines from some file. This
2611 array can be modified, and will be written out when flush_file_lines()
2612 is called. The parameters are :
2614 =item file - Full path to the file to read.
2616 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2620 $lref = read_file_lines("/etc/hosts");
2621 push(@$lref, "127.0.0.1 localhost");
2622 flush_file_lines("/etc/hosts");
2628 my ($package, $filename, $line) = caller;
2629 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2631 my $realfile = &translate_filename($_[0]);
2632 if (!$main::file_cache{$realfile}) {
2635 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2636 open(READFILE, $realfile);
2639 $eol = /\r\n$/ ? "\r\n" : "\n";
2645 $main::file_cache{$realfile} = \@lines;
2646 $main::file_cache_noflush{$realfile} = $_[1];
2647 $main::file_cache_eol{$realfile} = $eol || "\n";
2650 # Make read-write if currently readonly
2652 $main::file_cache_noflush{$realfile} = 0;
2655 return $main::file_cache{$realfile};
2658 =head2 flush_file_lines([file], [eol])
2660 Write out to a file previously read by read_file_lines to disk (except
2661 for those marked readonly). The parameters are :
2663 =item file - The file to flush out.
2665 =item eof - End-of-line character for each line. Defaults to \n.
2668 sub flush_file_lines
2672 local $trans = &translate_filename($_[0]);
2673 $main::file_cache{$trans} ||
2674 &error("flush_file_lines called on non-loaded file $trans");
2675 push(@files, $trans);
2678 @files = ( keys %main::file_cache );
2680 foreach my $f (@files) {
2681 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2682 if (!$main::file_cache_noflush{$f}) {
2683 &open_tempfile(FLUSHFILE, ">$f");
2684 foreach my $line (@{$main::file_cache{$f}}) {
2685 (print FLUSHFILE $line,$eol) ||
2686 &error(&text("efilewrite", $f, $!));
2688 &close_tempfile(FLUSHFILE);
2690 delete($main::file_cache{$f});
2691 delete($main::file_cache_noflush{$f});
2695 =head2 unflush_file_lines(file)
2697 Clear the internal cache of some given file, previously read by read_file_lines.
2700 sub unflush_file_lines
2702 my $realfile = &translate_filename($_[0]);
2703 delete($main::file_cache{$realfile});
2704 delete($main::file_cache_noflush{$realfile});
2707 =head2 unix_user_input(fieldname, user, [form])
2709 Returns HTML for an input to select a Unix user. By default this is a text
2710 box with a user popup button next to it.
2715 if (defined(&theme_unix_user_input)) {
2716 return &theme_unix_user_input(@_);
2718 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2719 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2722 =head2 unix_group_input(fieldname, user, [form])
2724 Returns HTML for an input to select a Unix group. By default this is a text
2725 box with a group popup button next to it.
2728 sub unix_group_input
2730 if (defined(&theme_unix_group_input)) {
2731 return &theme_unix_group_input(@_);
2733 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2734 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2737 =head2 hlink(text, page, [module], [width], [height])
2739 Returns HTML for a link that when clicked on pops up a window for a Webmin
2740 help page. The parameters are :
2742 =item text - Text for the link.
2744 =item page - Help page code, such as 'intro'.
2746 =item module - Module the help page is in. Defaults to the current module.
2748 =item width - Width of the help popup window. Defaults to 600 pixels.
2750 =item height - Height of the help popup window. Defaults to 400 pixels.
2752 The actual help pages are in each module's help sub-directory, in files with
2758 if (defined(&theme_hlink)) {
2759 return &theme_hlink(@_);
2761 my $mod = $_[2] ? $_[2] : &get_module_name();
2762 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2763 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2764 return "<a onClick='window.open(\"$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>";
2767 =head2 user_chooser_button(field, multiple, [form])
2769 Returns HTML for a javascript button for choosing a Unix user or users.
2770 The parameters are :
2772 =item field - Name of the HTML field to place the username into.
2774 =item multiple - Set to 1 if multiple users can be selected.
2776 =item form - Index of the form on the page.
2779 sub user_chooser_button
2781 return undef if (!&supports_users());
2782 return &theme_user_chooser_button(@_)
2783 if (defined(&theme_user_chooser_button));
2784 my $form = defined($_[2]) ? $_[2] : 0;
2785 my $w = $_[1] ? 500 : 300;
2787 if ($_[1] && $gconfig{'db_sizeusers'}) {
2788 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2790 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2791 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2793 return "<input type=button onClick='ifield = form.$_[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";
2796 =head2 group_chooser_button(field, multiple, [form])
2798 Returns HTML for a javascript button for choosing a Unix group or groups
2799 The parameters are :
2801 =item field - Name of the HTML field to place the group name into.
2803 =item multiple - Set to 1 if multiple groups can be selected.
2805 =item form - Index of the form on the page.
2808 sub group_chooser_button
2810 return undef if (!&supports_users());
2811 return &theme_group_chooser_button(@_)
2812 if (defined(&theme_group_chooser_button));
2813 my $form = defined($_[2]) ? $_[2] : 0;
2814 my $w = $_[1] ? 500 : 300;
2816 if ($_[1] && $gconfig{'db_sizeusers'}) {
2817 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2819 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2820 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2822 return "<input type=button onClick='ifield = form.$_[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";
2825 =head2 foreign_check(module, [api-only])
2827 Checks if some other module exists and is supported on this OS. The parameters
2830 =item module - Name of the module to check.
2832 =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.
2837 my ($mod, $api) = @_;
2839 my $mdir = &module_root_directory($mod);
2840 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2841 return &check_os_support(\%minfo, undef, undef, $api);
2844 =head2 foreign_exists(module)
2846 Checks if some other module exists. The module parameter is the short module
2852 my $mdir = &module_root_directory($_[0]);
2853 return -r "$mdir/module.info";
2856 =head2 foreign_available(module)
2858 Returns 1 if some module is installed, and acessible to the current user. The
2859 module parameter is the module directory name.
2862 sub foreign_available
2864 return 0 if (!&foreign_check($_[0]) &&
2865 !$gconfig{'available_even_if_no_support'});
2866 my %foreign_module_info = &get_module_info($_[0]);
2868 # Check list of allowed modules
2870 &read_acl(\%acl, undef);
2871 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2872 !$acl{$base_remote_user,'*'});
2874 # Check for usermod restrictions
2875 my @usermods = &list_usermods();
2876 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2878 if (&get_product_name() eq "webmin") {
2879 # Check if the user has any RBAC privileges in this module
2880 if (&supports_rbac($_[0]) &&
2881 &use_rbac_module_acl(undef, $_[0])) {
2882 # RBAC is enabled for this user and module - check if he
2884 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2885 return 0 if (!$rbacs);
2887 elsif ($gconfig{'rbacdeny_'.$u}) {
2888 # If denying access to modules not specifically allowed by
2889 # RBAC, then prevent access
2894 # Check readonly support
2895 if (&is_readonly_mode()) {
2896 return 0 if (!$foreign_module_info{'readonly'});
2899 # Check if theme vetos
2900 if (defined(&theme_foreign_available)) {
2901 return 0 if (!&theme_foreign_available($_[0]));
2904 # Check if licence module vetos
2905 if ($main::licence_module) {
2906 return 0 if (!&foreign_call($main::licence_module,
2907 "check_module_licence", $_[0]));
2913 =head2 foreign_require(module, [file], [package])
2915 Brings in functions from another module, and places them in the Perl namespace
2916 with the same name as the module. The parameters are :
2918 =item module - The source module's directory name, like sendmail.
2920 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2922 =item package - Perl package to place the module's functions and global variables in.
2924 If the original module name contains dashes, they will be replaced with _ in
2930 my ($mod, $file, $pkg) = @_;
2931 $pkg ||= $mod || "global";
2932 $pkg =~ s/[^A-Za-z0-9]/_/g;
2935 push(@files, $file);
2939 my %minfo = &get_module_info($mod);
2940 if ($minfo{'library'}) {
2941 @files = split(/\s+/, $minfo{'library'});
2944 @files = ( $mod."-lib.pl" );
2947 my @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
2948 return 1 if (!@files);
2949 foreach my $f (@files) {
2950 $main::done_foreign_require{$pkg,$f}++;
2953 my $mdir = &module_root_directory($mod);
2954 @INC = &unique($mdir, @INC);
2955 -d $mdir || &error("Module $mod does not exist");
2956 if (!&get_module_name() && $mod) {
2959 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
2960 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
2961 my $code = "package $pkg; ".
2962 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
2963 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
2964 foreach my $f (@files) {
2965 $code .= "do '$mdir/$f' || die \$@; ";
2968 if (defined($old_fmn)) {
2969 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
2972 delete($ENV{'FOREIGN_MODULE_NAME'});
2974 if (defined($old_frd)) {
2975 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
2978 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
2981 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
2985 =head2 foreign_call(module, function, [arg]*)
2987 Call a function in another module. The module parameter is the target module
2988 directory name, function is the perl sub to call, and the remaining parameters
2989 are the arguments. However, unless you need to call a function whose name
2990 is dynamic, it is better to use Perl's cross-module function call syntax
2991 like module::function(args).
2996 my $pkg = $_[0] || "global";
2997 $pkg =~ s/[^A-Za-z0-9]/_/g;
2998 my @args = @_[2 .. @_-1];
2999 $main::foreign_args = \@args;
3000 my @rv = eval <<EOF;
3002 &$_[1](\@{\$main::foreign_args});
3004 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3005 return wantarray ? @rv : $rv[0];
3008 =head2 foreign_config(module, [user-config])
3010 Get the configuration from another module, and return it as a hash. If the
3011 user-config parameter is set to 1, returns the Usermin user-level preferences
3012 for the current user instead.
3017 my ($mod, $uc) = @_;
3020 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3021 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3022 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3025 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3030 =head2 foreign_installed(module, mode)
3032 Checks if the server for some module is installed, and possibly also checks
3033 if the module has been configured by Webmin.
3034 For mode 1, returns 2 if the server is installed and configured for use by
3035 Webmin, 1 if installed but not configured, or 0 otherwise.
3036 For mode 0, returns 1 if installed, 0 if not.
3037 If the module does not provide an install_check.pl script, assumes that
3038 the server is installed.
3041 sub foreign_installed
3043 my ($mod, $configured) = @_;
3044 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3046 return $main::foreign_installed_cache{$mod,$configured};
3050 if (!&foreign_check($mod)) {
3055 my $mdir = &module_root_directory($mod);
3056 if (!-r "$mdir/install_check.pl") {
3057 # Not known, assume OK
3058 $rv = $configured ? 2 : 1;
3061 # Call function to check
3062 &foreign_require($mod, "install_check.pl");
3063 $rv = &foreign_call($mod, "is_installed", $configured);
3066 $main::foreign_installed_cache{$mod,$configured} = $rv;
3071 =head2 foreign_defined(module, function)
3073 Returns 1 if some function is defined in another module. In general, it is
3074 simpler to use the syntax &defined(module::function) instead.
3080 $pkg =~ s/[^A-Za-z0-9]/_/g;
3081 my $func = "${pkg}::$_[1]";
3082 return defined(&$func);
3085 =head2 get_system_hostname([short])
3087 Returns the hostname of this system. If the short parameter is set to 1,
3088 then the domain name is not prepended - otherwise, Webmin will attempt to get
3089 the fully qualified hostname, like foo.example.com.
3092 sub get_system_hostname
3095 if (!$main::get_system_hostname[$m]) {
3096 if ($gconfig{'os_type'} ne 'windows') {
3097 # Try some common Linux hostname files first
3099 if ($gconfig{'os_type'} eq 'redhat-linux') {
3101 &read_env_file("/etc/sysconfig/network", \%nc);
3102 if ($nc{'HOSTNAME'}) {
3103 $fromfile = $nc{'HOSTNAME'};
3106 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3107 my $hn = &read_file_contents("/etc/hostname");
3113 elsif ($gconfig{'os_type'} eq 'open-linux') {
3114 my $hn = &read_file_contents("/etc/HOSTNAME");
3120 elsif ($gconfig{'os_type'} eq 'solaris') {
3121 my $hn = &read_file_contents("/etc/nodename");
3128 # If we found a hostname, use it if value
3129 if ($fromfile && ($m || $fromfile =~ /\./)) {
3131 $fromfile =~ s/\..*$//;
3133 $main::get_system_hostname[$m] = $fromfile;
3137 # Can use hostname command on Unix
3138 &execute_command("hostname", undef,
3139 \$main::get_system_hostname[$m], undef, 0, 1);
3140 chop($main::get_system_hostname[$m]);
3142 eval "use Sys::Hostname";
3144 $main::get_system_hostname[$m] = eval "hostname()";
3146 if ($@ || !$main::get_system_hostname[$m]) {
3147 $main::get_system_hostname[$m] = "UNKNOWN";
3150 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3151 $gconfig{'os_type'} =~ /linux$/ &&
3152 !$gconfig{'no_hostname_f'} && !$_[0]) {
3153 # Try with -f flag to get fully qualified name
3155 my $ex = &execute_command("hostname -f", undef, \$flag,
3158 if ($ex || $flag eq "") {
3159 # -f not supported! We have probably set the
3160 # hostname to just '-f'. Fix the problem
3163 &execute_command("hostname ".
3164 quotemeta($main::get_system_hostname[$m]),
3165 undef, undef, undef, 0, 1);
3169 $main::get_system_hostname[$m] = $flag;
3174 # On Windows, try computername environment variable
3175 return $ENV{'computername'} if ($ENV{'computername'});
3176 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3178 # Fall back to net name command
3179 my $out = `net name 2>&1`;
3180 if ($out =~ /\-+\r?\n(\S+)/) {
3181 $main::get_system_hostname[$m] = $1;
3184 $main::get_system_hostname[$m] = "windows";
3188 return $main::get_system_hostname[$m];
3191 =head2 get_webmin_version
3193 Returns the version of Webmin currently being run, such as 1.450.
3196 sub get_webmin_version
3198 if (!$get_webmin_version) {
3199 open(VERSION, "$root_directory/version") || return 0;
3200 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3203 return $get_webmin_version;
3206 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3208 Returns a hash containing access control options for the given user and module.
3209 By default the current username and module name are used. If the no-rbac flag
3210 is given, the permissions will not be updated based on the user's RBAC role
3211 (as seen on Solaris). If the no-default flag is given, default permissions for
3212 the module will not be included.
3217 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3218 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3219 my $mdir = &module_root_directory($m);
3222 # Read default ACL first, to be overridden by per-user settings
3223 &read_file_cached("$mdir/defaultacl", \%rv);
3225 # If this isn't a master admin user, apply the negative permissions
3226 # so that he doesn't un-expectedly gain access to new features
3228 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3229 if ($gaccess{'negative'}) {
3230 &read_file_cached("$mdir/negativeacl", \%rv);
3234 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3235 # RBAC overrides exist for this user in this module
3236 my $rbac = &get_rbac_module_acl(
3237 defined($_[0]) ? $_[0] : $remote_user, $m);
3238 foreach my $r (keys %$rbac) {
3239 $rv{$r} = $rbac->{$r};
3242 elsif ($gconfig{"risk_$u"} && $m) {
3243 # ACL is defined by user's risk level
3244 my $rf = $gconfig{"risk_$u"}.'.risk';
3245 &read_file_cached("$mdir/$rf", \%rv);
3247 my $sf = $gconfig{"skill_$u"}.'.skill';
3248 &read_file_cached("$mdir/$sf", \%rv);
3251 # Use normal Webmin ACL, if a user is set
3252 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3253 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3254 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3257 if ($tconfig{'preload_functions'}) {
3258 &load_theme_library();
3260 if (defined(&theme_get_module_acl)) {
3261 %rv = &theme_get_module_acl($u, $m, \%rv);
3266 =head2 get_group_module_acl(group, [module])
3268 Returns the ACL for a Webmin group, in an optional module (which defaults to
3269 the current module).
3272 sub get_group_module_acl
3275 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3276 my $mdir = &module_root_directory($m);
3278 &read_file_cached("$mdir/defaultacl", \%rv);
3279 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3280 if (defined(&theme_get_module_acl)) {
3281 %rv = &theme_get_module_acl($g, $m, \%rv);
3286 =head2 save_module_acl(&acl, [user], [module])
3288 Updates the acl hash for some user and module. The parameters are :
3290 =item acl - Hash reference for the new access control options.
3292 =item user - User to update, defaulting to the current user.
3294 =item module - Module to update, defaulting to the caller.
3299 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3300 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3301 if (&foreign_check("acl")) {
3302 # Check if this user is a member of a group, and if he gets the
3303 # module from a group. If so, update its ACL as well
3304 &foreign_require("acl", "acl-lib.pl");
3306 foreach my $g (&acl::list_groups()) {
3307 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3308 &indexof($m, @{$g->{'modules'}}) >= 0) {
3314 &save_group_module_acl($_[0], $group->{'name'}, $m);
3317 if (!-d "$config_directory/$m") {
3318 mkdir("$config_directory/$m", 0755);
3320 &write_file("$config_directory/$m/$u.acl", $_[0]);
3323 =head2 save_group_module_acl(&acl, group, [module])
3325 Updates the acl hash for some group and module. The parameters are :
3327 =item acl - Hash reference for the new access control options.
3329 =item group - Group name to update.
3331 =item module - Module to update, defaulting to the caller.
3334 sub save_group_module_acl
3337 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3338 if (&foreign_check("acl")) {
3339 # Check if this group is a member of a group, and if it gets the
3340 # module from a group. If so, update the parent ACL as well
3341 &foreign_require("acl", "acl-lib.pl");
3343 foreach my $pg (&acl::list_groups()) {
3344 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3345 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3351 &save_group_module_acl($_[0], $group->{'name'}, $m);
3354 if (!-d "$config_directory/$m") {
3355 mkdir("$config_directory/$m", 0755);
3357 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3362 This function must be called by all Webmin CGI scripts, either directly or
3363 indirectly via a per-module lib.pl file. It performs a number of initialization
3364 and housekeeping tasks, such as working out the module name, checking that the
3365 current user has access to the module, and populating global variables. Some
3366 of the variables set include :
3368 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3370 =item $var_directory - Base logs directory, typically /var/webmin
3372 =item %config - Per-module configuration.
3374 =item %gconfig - Global configuration.
3376 =item $scriptname - Base name of the current perl script.
3378 =item $module_name - The name of the current module.
3380 =item $module_config_directory - The config directory for this module.
3382 =item $module_config_file - The config file for this module.
3384 =item $module_root_directory - This module's code directory.
3386 =item $webmin_logfile - The detailed logfile for webmin.
3388 =item $remote_user - The actual username used to login to webmin.
3390 =item $base_remote_user - The username whose permissions are in effect.
3392 =item $current_theme - The theme currently in use.
3394 =item $root_directory - The first root directory of this webmin install.
3396 =item @root_directories - All root directories for this webmin install.
3401 # Record first process ID that called this, so we know when it exited to clean
3403 $main::initial_process_id ||= $$;
3405 # Configuration and spool directories
3406 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3407 die "WEBMIN_CONFIG not set";
3409 $config_directory = $ENV{'WEBMIN_CONFIG'};
3410 if (!defined($ENV{'WEBMIN_VAR'})) {
3411 open(VARPATH, "$config_directory/var-path");
3412 chop($var_directory = <VARPATH>);
3416 $var_directory = $ENV{'WEBMIN_VAR'};
3418 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3419 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3421 if ($ENV{'SESSION_ID'}) {
3422 # Hide this variable from called programs, but keep it for internal use
3423 $main::session_id = $ENV{'SESSION_ID'};
3424 delete($ENV{'SESSION_ID'});
3426 if ($ENV{'REMOTE_PASS'}) {
3427 # Hide the password too
3428 $main::remote_pass = $ENV{'REMOTE_PASS'};
3429 delete($ENV{'REMOTE_PASS'});
3432 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3433 # Looks like we are running setuid, but the real UID hasn't been set.
3434 # Do so now, so that executed programs don't get confused
3439 # Read the webmin global config file. This contains the OS type and version,
3440 # OS specific configuration and global options such as proxy servers
3441 $config_file = "$config_directory/config";
3443 &read_file_cached($config_file, \%gconfig);
3444 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3445 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3447 # If debugging is enabled, open the debug log
3448 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3449 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3450 if ($gconfig{'debug_size'}) {
3451 my @st = stat($dlog);
3452 if ($st[7] > $gconfig{'debug_size'}) {
3453 rename($dlog, $dlog.".0");
3456 open(main::DEBUGLOG, ">>$dlog");
3457 $main::opened_debug_log = 1;
3459 if ($gconfig{'debug_what_start'}) {
3460 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3461 $main::debug_log_start_time = time();
3462 &webmin_debug_log("START", "script=$script_name");
3463 $main::debug_log_start_module = $module_name;
3467 # Set PATH and LD_LIBRARY_PATH
3468 if ($gconfig{'path'}) {
3469 if ($gconfig{'syspath'}) {
3471 $ENV{'PATH'} = $gconfig{'path'};
3475 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3478 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3480 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3481 if ($gconfig{'http_proxy'}) {
3482 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3484 if ($gconfig{'ftp_proxy'}) {
3485 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3487 if ($gconfig{'noproxy'}) {
3488 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3491 # Find all root directories
3493 if (&get_miniserv_config(\%miniserv)) {
3494 @root_directories = ( $miniserv{'root'} );
3495 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3496 push(@root_directories, $miniserv{"extraroot_$i"});
3500 # Work out which module we are in, and read the per-module config file
3501 $0 =~ s/\\/\//g; # Force consistent path on Windows
3502 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3503 # In a foreign call - use the module name given
3504 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3505 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3506 @root_directories = ( $root_directory ) if (!@root_directories);
3508 elsif ($ENV{'SCRIPT_NAME'}) {
3509 my $sn = $ENV{'SCRIPT_NAME'};
3510 $sn =~ s/^$gconfig{'webprefix'}//
3511 if (!$gconfig{'webprefixnoredir'});
3512 if ($sn =~ /^\/([^\/]+)\//) {
3513 # Get module name from CGI path
3516 if ($ENV{'SERVER_ROOT'}) {
3517 $root_directory = $ENV{'SERVER_ROOT'};
3519 elsif ($ENV{'SCRIPT_FILENAME'}) {
3520 $root_directory = $ENV{'SCRIPT_FILENAME'};
3521 $root_directory =~ s/$sn$//;
3523 @root_directories = ( $root_directory ) if (!@root_directories);
3526 # Get root directory from miniserv.conf, and deduce module name from $0
3527 $root_directory = $root_directories[0];
3529 foreach my $r (@root_directories) {
3530 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3531 # Under a module directory
3536 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3542 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3545 # Work out of this is a web, command line or cron job
3546 if (!$main::webmin_script_type) {
3547 if ($ENV{'SCRIPT_NAME'}) {
3549 $main::webmin_script_type = 'web';
3552 # Cron jobs have no TTY
3553 if ($gconfig{'os_type'} eq 'windows' ||
3554 open(DEVTTY, ">/dev/tty")) {
3555 $main::webmin_script_type = 'cmd';
3559 $main::webmin_script_type = 'cron';
3564 # Set the umask based on config
3565 if ($gconfig{'umask'} && !$main::umask_already++) {
3566 umask(oct($gconfig{'umask'}));
3569 # If this is a cron job or other background task, set the nice level
3570 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3572 if ($gconfig{'nice'}) {
3573 eval 'POSIX::nice($gconfig{\'nice\'});';
3576 # Set IO scheduling class and priority
3577 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3579 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3580 if ($gconfig{'sclass'} ne '');
3581 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3582 if ($gconfig{'sprio'} ne '');
3584 &execute_command("$cmd >/dev/null 2>&1");
3587 $main::nice_already++;
3590 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3591 $base_remote_user = $u;
3592 $remote_user = $ENV{'REMOTE_USER'};
3595 # Find and load the configuration file for this module
3596 my (@ruinfo, $rgroup);
3597 $module_config_directory = "$config_directory/$module_name";
3598 if (&get_product_name() eq "usermin" &&
3599 -r "$module_config_directory/config.$remote_user") {
3601 $module_config_file = "$module_config_directory/config.$remote_user";
3603 elsif (&get_product_name() eq "usermin" &&
3604 (@ruinfo = getpwnam($remote_user)) &&
3605 ($rgroup = getgrgid($ruinfo[3])) &&
3606 -r "$module_config_directory/config.\@$rgroup") {
3607 # Based on group name
3608 $module_config_file = "$module_config_directory/config.\@$rgroup";
3612 $module_config_file = "$module_config_directory/config";
3615 &read_file_cached($module_config_file, \%config);
3617 # Fix up windows-specific substitutions in values
3618 foreach my $k (keys %config) {
3619 if ($config{$k} =~ /\$\{systemroot\}/) {
3620 my $root = &get_windows_root();
3621 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3626 # Record the initial module
3627 $main::initial_module_name ||= $module_name;
3629 # Set some useful variables
3631 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3632 $gconfig{'mobile_theme'} :
3633 defined($gconfig{'theme_'.$remote_user}) ?
3634 $gconfig{'theme_'.$remote_user} :
3635 defined($gconfig{'theme_'.$base_remote_user}) ?
3636 $gconfig{'theme_'.$base_remote_user} :
3638 @current_themes = split(/\s+/, $current_themes);
3639 $current_theme = $current_themes[0];
3640 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3641 $theme_root_directory = $theme_root_directories[0];
3642 @theme_configs = ( );
3643 foreach my $troot (@theme_root_directories) {
3645 &read_file_cached("$troot/config", \%onetconfig);
3646 &read_file_cached("$troot/config", \%tconfig);
3647 push(@theme_configs, \%onetconfig);
3649 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3650 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3652 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3653 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3655 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3656 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3657 if ($tconfig{'preload_functions'}) {
3658 # Force load of theme functions right now, if requested
3659 &load_theme_library();
3661 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3662 # Load the theme's Webmin:: package classes
3663 do "$theme_root_directory/$tconfig{'oofunctions'}";
3668 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3669 : "$var_directory/webmin.log";
3671 # Load language strings into %text
3672 my @langs = &list_languages();
3674 if ($gconfig{'acceptlang'}) {
3675 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3676 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3678 $accepted_lang = $al->{'lang'};
3683 $current_lang = $force_lang ? $force_lang :
3684 $accepted_lang ? $accepted_lang :
3685 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3686 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3687 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3688 foreach my $l (@langs) {
3689 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3691 @lang_order_list = &unique($default_lang,
3692 split(/:/, $current_lang_info->{'fallback'}),
3694 %text = &load_language($module_name);
3695 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3697 # Get the %module_info for this module
3699 my ($mi) = grep { $_->{'dir'} eq $module_name }
3700 &get_all_module_infos(2);
3701 %module_info = %$mi;
3702 $module_root_directory = &module_root_directory($module_name);
3705 if ($module_name && !$main::no_acl_check &&
3706 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3707 # Check if the HTTP user can access this module
3708 if (!&foreign_available($module_name)) {
3709 if (!&foreign_check($module_name)) {
3710 &error(&text('emodulecheck',
3711 "<i>$module_info{'desc'}</i>"));
3714 &error(&text('emodule', "<i>$u</i>",
3715 "<i>$module_info{'desc'}</i>"));
3718 $main::no_acl_check++;
3721 # Check the Referer: header for nasty redirects
3722 my @referers = split(/\s+/, $gconfig{'referers'});
3724 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3727 my $http_host = $ENV{'HTTP_HOST'};
3728 $http_host =~ s/:\d+$//;
3730 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index_cgi) &&
3731 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3732 $unsafe_index_cgi) &&
3733 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3734 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3735 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3736 ($referer_site && $referer_site ne $http_host &&
3737 &indexof($referer_site, @referers) < 0 ||
3738 !$referer_site && $gconfig{'referers_none'}) &&
3739 !$trust_unknown_referers &&
3740 !&get_module_variable('$trust_unknown_referers')) {
3741 # Looks like a link from elsewhere .. show an error
3742 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3744 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3745 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3746 if ($referer_site) {
3748 print &text('referer_warn',
3749 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3751 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3752 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3755 # No referer info given
3756 print &text('referer_warn_unknown', $url),"<p>\n";
3757 print &text('referer_fix1u'),"<p>\n";
3758 print &text('referer_fix2u'),"<p>\n";
3762 &footer("/", $text{'index'});
3765 $main::no_referers_check++;
3766 $main::completed_referers_check++;
3768 # Call theme post-init
3769 if (defined(&theme_post_init_config)) {
3770 &theme_post_init_config(@_);
3773 # Record that we have done the calling library in this package
3774 my ($callpkg, $lib) = caller();
3776 $main::done_foreign_require{$callpkg,$lib} = 1;
3778 # If a licence checking is enabled, do it now
3779 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3780 &foreign_check($gconfig{'licence_module'}) &&
3781 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3782 my $oldpwd = &get_current_dir();
3783 $main::done_licence_module_check++;
3784 $main::licence_module = $gconfig{'licence_module'};
3785 &foreign_require($main::licence_module, "licence_check.pl");
3786 ($main::licence_status, $main::licence_message) =
3787 &foreign_call($main::licence_module, "check_licence");
3791 # Export global variables to caller
3792 if ($main::export_to_caller) {
3793 foreach my $v ('$config_file', '%gconfig', '$null_file',
3794 '$path_separator', '@root_directories',
3795 '$root_directory', '$module_name',
3796 '$base_remote_user', '$remote_user',
3797 '$module_config_directory', '$module_config_file',
3798 '%config', '@current_themes', '$current_theme',
3799 '@theme_root_directories', '$theme_root_directory',
3800 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3801 '$webmin_logfile', '$current_lang',
3802 '$current_lang_info', '@lang_order_list', '%text',
3803 '%module_info', '$module_root_directory') {
3804 my ($vt, $vn) = split('', $v, 2);
3805 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3812 =head2 load_language([module], [directory])
3814 Returns a hashtable mapping text codes to strings in the appropriate language,
3815 based on the $current_lang global variable, which is in turn set based on
3816 the Webmin user's selection. The optional module parameter tells the function
3817 which module to load strings for, and defaults to the calling module. The
3818 optional directory parameter can be used to load strings from a directory
3821 In regular module development you will never need to call this function
3822 directly, as init_config calls it for you, and places the module's strings
3823 into the %text hash.
3829 my $root = $root_directory;
3830 my $ol = $gconfig{'overlang'};
3831 my ($dir) = ($_[1] || "lang");
3833 # Read global lang files
3834 foreach my $o (@lang_order_list) {
3835 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3836 return () if (!$ok && $o eq $default_lang);
3839 foreach my $o (@lang_order_list) {
3840 &read_file_cached("$root/$ol/$o", \%text);
3843 &read_file_cached("$config_directory/custom-lang", \%text);
3846 # Read module's lang files
3847 my $mdir = &module_root_directory($_[0]);
3848 foreach my $o (@lang_order_list) {
3849 &read_file_cached("$mdir/$dir/$o", \%text);
3852 foreach $o (@lang_order_list) {
3853 &read_file_cached("$mdir/$ol/$o", \%text);
3856 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3858 foreach $k (keys %text) {
3859 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3862 if (defined(&theme_load_language)) {
3863 &theme_load_language(\%text, $_[0]);
3868 =head2 text_subs(string)
3870 Used internally by load_language to expand $code substitutions in language
3876 if (substr($_[0], 0, 8) eq "include:") {
3879 open(INCLUDE, substr($_[0], 8));
3887 my $t = $_[1]->{$_[0]};
3888 return defined($t) ? $t : '$'.$_[0];
3892 =head2 text(message, [substitute]+)
3894 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3895 the substitute parameters. This makes it easy to use strings with placeholders
3896 that get replaced with programmatically generated text. For example :
3898 print &text('index_hello', $remote_user),"<p>\n";
3903 my $t = &get_module_variable('%text', 1);
3904 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3905 for(my $i=1; $i<@_; $i++) {
3906 $rv =~ s/\$$i/$_[$i]/g;
3911 =head2 encode_base64(string)
3913 Encodes a string into base64 format, for use in MIME email or HTTP
3914 authorization headers.
3920 pos($_[0]) = 0; # ensure start at the beginning
3921 while ($_[0] =~ /(.{1,57})/gs) {
3922 $res .= substr(pack('u57', $1), 1)."\n";
3925 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3926 my $padding = (3 - length($_[0]) % 3) % 3;
3927 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3931 =head2 decode_base64(string)
3933 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3940 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3941 if (length($str) % 4) {
3944 $str =~ s/=+$//; # remove padding
3945 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3946 while ($str =~ /(.{1,60})/gs) {
3947 my $len = chr(32 + length($1)*3/4); # compute length byte
3948 $res .= unpack("u", $len . $1 ); # uudecode
3953 =head2 get_module_info(module, [noclone], [forcache])
3955 Returns a hash containg details of the given module. Some useful keys are :
3957 =item dir - The module directory, like sendmail.
3959 =item desc - Human-readable description, in the current users' language.
3961 =item version - Optional module version number.
3963 =item os_support - List of supported operating systems and versions.
3965 =item category - Category on Webmin's left menu, like net.
3970 return () if ($_[0] =~ /^\./);
3971 my (%rv, $clone, $o);
3972 my $mdir = &module_root_directory($_[0]);
3973 &read_file_cached("$mdir/module.info", \%rv) || return ();
3975 foreach $o (@lang_order_list) {
3976 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
3977 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
3979 if ($clone && !$_[1] && $config_directory) {
3980 $rv{'clone'} = $rv{'desc'};
3981 &read_file("$config_directory/$_[0]/clone", \%rv);
3984 my %module_categories;
3985 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
3986 my $pn = &get_product_name();
3987 if (defined($rv{'category_'.$pn})) {
3988 # Can override category for webmin/usermin
3989 $rv{'category'} = $rv{'category_'.$pn};
3991 $rv{'realcategory'} = $rv{'category'};
3992 $rv{'category'} = $module_categories{$_[0]}
3993 if (defined($module_categories{$_[0]}));
3995 # Apply description overrides
3996 $rv{'realdesc'} = $rv{'desc'};
3998 &read_file_cached("$config_directory/webmin.descs", \%descs);
3999 if ($descs{$_[0]." ".$current_lang}) {
4000 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4002 elsif ($descs{$_[0]}) {
4003 $rv{'desc'} = $descs{$_[0]};
4007 # Apply per-user description overridde
4008 my %gaccess = &get_module_acl(undef, "");
4009 if ($gaccess{'desc_'.$_[0]}) {
4010 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4014 if ($rv{'longdesc'}) {
4015 # All standard modules have an index.cgi
4016 $rv{'index_link'} = 'index.cgi';
4019 # Call theme-specific override function
4020 if (defined(&theme_get_module_info)) {
4021 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4027 =head2 get_all_module_infos(cachemode)
4029 Returns a list contains the information on all modules in this webmin
4030 install, including clones. Uses caching to reduce the number of module.info
4031 files that need to be read. Each element of the array is a hash reference
4032 in the same format as returned by get_module_info. The cache mode flag can be :
4033 0 = read and write, 1 = don't read or write, 2 = read only
4036 sub get_all_module_infos
4040 # Is the cache out of date? (ie. have any of the root's changed?)
4041 my $cache_file = "$config_directory/module.infos.cache";
4043 if (&read_file_cached($cache_file, \%cache)) {
4044 foreach my $r (@root_directories) {
4046 if ($st[9] != $cache{'mtime_'.$r}) {
4056 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4057 # Can use existing module.info cache
4059 foreach my $k (keys %cache) {
4060 if ($k =~ /^(\S+) (\S+)$/) {
4061 $mods{$1}->{$2} = $cache{$k};
4064 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4067 # Need to rebuild cache
4069 foreach my $r (@root_directories) {
4071 foreach my $m (readdir(DIR)) {
4072 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4073 my %minfo = &get_module_info($m, 0, 1);
4074 next if (!%minfo || !$minfo{'dir'});
4076 foreach $k (keys %minfo) {
4077 $cache{"${m} ${k}"} = $minfo{$k};
4082 $cache{'mtime_'.$r} = $st[9];
4084 $cache{'lang'} = $current_lang;
4085 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4088 # Override descriptions for modules for current user
4089 my %gaccess = &get_module_acl(undef, "");
4090 foreach my $m (@rv) {
4091 if ($gaccess{"desc_".$m->{'dir'}}) {
4092 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4096 # Apply installed flags
4098 &read_file_cached("$config_directory/installed.cache", \%installed);
4099 foreach my $m (@rv) {
4100 $m->{'installed'} = $installed{$m->{'dir'}};
4106 =head2 get_theme_info(theme)
4108 Returns a hash containing a theme's details, taken from it's theme.info file.
4109 Some useful keys are :
4111 =item dir - The theme directory, like blue-theme.
4113 =item desc - Human-readable description, in the current users' language.
4115 =item version - Optional module version number.
4117 =item os_support - List of supported operating systems and versions.
4122 return () if ($_[0] =~ /^\./);
4124 my $tdir = &module_root_directory($_[0]);
4125 &read_file("$tdir/theme.info", \%rv) || return ();
4126 foreach my $o (@lang_order_list) {
4127 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4133 =head2 list_languages
4135 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4136 Each is a hash reference with the following keys :
4138 =item lang - The short language code, like es for Spanish.
4140 =item desc - A human-readable description, in English.
4142 =item charset - An optional character set to use when displaying the language.
4144 =item titles - Set to 1 only if Webmin has title images for the language.
4146 =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.
4151 if (!@main::list_languages_cache) {
4154 open(LANG, "$root_directory/lang_list.txt");
4156 if (/^(\S+)\s+(.*)/) {
4157 my $l = { 'desc' => $2 };
4158 foreach $o (split(/,/, $1)) {
4159 if ($o =~ /^([^=]+)=(.*)$/) {
4163 $l->{'index'} = scalar(@rv);
4164 push(@main::list_languages_cache, $l);
4168 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4169 @main::list_languages_cache;
4171 return @main::list_languages_cache;
4174 =head2 read_env_file(file, &hash)
4176 Similar to Webmin's read_file function, but handles files containing shell
4177 environment variables formatted like :
4182 The file parameter is the full path to the file to read, and hash a Perl hash
4183 ref to read names and values into.
4189 &open_readfile(FILE, $_[0]) || return 0;
4192 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4193 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4194 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4202 =head2 write_env_file(file, &hash, [export])
4204 Writes out a hash to a file in name='value' format, suitable for use in a shell
4205 script. The parameters are :
4207 =item file - Full path for a file to write to
4209 =item hash - Hash reference of names and values to write.
4211 =item export - If set to 1, preceed each variable setting with the word 'export'.
4216 my $exp = $_[2] ? "export " : "";
4217 &open_tempfile(FILE, ">$_[0]");
4218 foreach my $k (keys %{$_[1]}) {
4219 my $v = $_[1]->{$k};
4220 if ($v =~ /^\S+$/) {
4221 &print_tempfile(FILE, "$exp$k=$v\n");
4224 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4227 &close_tempfile(FILE);
4230 =head2 lock_file(filename, [readonly], [forcefile])
4232 Lock a file for exclusive access. If the file is already locked, spin
4233 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4234 to work OK. The parameters are :
4236 =item filename - File or directory to lock.
4238 =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.
4240 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4245 my $realfile = &translate_filename($_[0]);
4246 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4247 my $no_lock = !&can_lock_file($realfile);
4248 my $lock_tries_count = 0;
4251 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4256 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4259 # Create the .lock file
4260 open(LOCKING, ">$realfile.lock") || return 0;
4261 my $lck = eval "flock(LOCKING, 2+4)";
4263 # Lock of lock file failed! Wait till later
4266 print LOCKING $$,"\n";
4267 eval "flock(LOCKING, 8)";
4270 $main::locked_file_list{$realfile} = int($_[1]);
4271 push(@main::temporary_files, "$realfile.lock");
4272 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4273 !&get_module_variable('$no_log_file_changes') &&
4275 # Grab a copy of this file for later diffing
4277 $main::locked_file_data{$realfile} = undef;
4279 $main::locked_file_type{$realfile} = 1;
4280 $main::locked_file_data{$realfile} = '';
4282 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4283 $main::locked_file_type{$realfile} = 2;
4284 $main::locked_file_data{$realfile} = $lnk;
4286 elsif (open(ORIGFILE, $realfile)) {
4287 $main::locked_file_type{$realfile} = 0;
4288 $main::locked_file_data{$realfile} = '';
4291 $main::locked_file_data{$realfile} .=$_;
4300 if ($lock_tries_count++ > 5*60) {
4301 # Give up after 5 minutes
4302 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4308 =head2 unlock_file(filename)
4310 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4311 file changes is enabled, then at unlock file a diff will be taken between the
4312 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4313 called. This can then be viewed in the Webmin Actions Log module.
4318 my $realfile = &translate_filename($_[0]);
4319 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4320 unlink("$realfile.lock") if (&can_lock_file($realfile));
4321 delete($main::locked_file_list{$realfile});
4322 if (exists($main::locked_file_data{$realfile})) {
4323 # Diff the new file with the old
4325 my $lnk = readlink($realfile);
4326 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4327 my $oldtype = $main::locked_file_type{$realfile};
4328 my $new = !defined($main::locked_file_data{$realfile});
4329 if ($new && !-e _) {
4330 # file doesn't exist, and never did! do nothing ..
4332 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4333 # is (or was) a directory ..
4334 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4335 push(@main::locked_file_diff,
4336 { 'type' => 'mkdir', 'object' => $realfile });
4338 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4339 push(@main::locked_file_diff,
4340 { 'type' => 'rmdir', 'object' => $realfile });
4343 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4344 # is (or was) a symlink ..
4345 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4346 push(@main::locked_file_diff,
4347 { 'type' => 'symlink', 'object' => $realfile,
4350 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4351 push(@main::locked_file_diff,
4352 { 'type' => 'unsymlink', 'object' => $realfile,
4353 'data' => $main::locked_file_data{$realfile} });
4355 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4356 push(@main::locked_file_diff,
4357 { 'type' => 'resymlink', 'object' => $realfile,
4362 # is a file, or has changed type?!
4363 my ($diff, $delete_file);
4364 my $type = "modify";
4366 open(NEWFILE, ">$realfile");
4371 if (!defined($main::locked_file_data{$realfile})) {
4374 open(ORIGFILE, ">$realfile.webminorig");
4375 print ORIGFILE $main::locked_file_data{$realfile};
4377 $diff = &backquote_command(
4378 "diff ".quotemeta("$realfile.webminorig")." ".
4379 quotemeta($realfile)." 2>/dev/null");
4380 push(@main::locked_file_diff,
4381 { 'type' => $type, 'object' => $realfile,
4382 'data' => $diff } ) if ($diff);
4383 unlink("$realfile.webminorig");
4384 unlink($realfile) if ($delete_file);
4387 if ($gconfig{'logfullfiles'}) {
4388 # Add file details to list of those to fully log
4389 $main::orig_file_data{$realfile} ||=
4390 $main::locked_file_data{$realfile};
4391 $main::orig_file_type{$realfile} ||=
4392 $main::locked_file_type{$realfile};
4395 delete($main::locked_file_data{$realfile});
4396 delete($main::locked_file_type{$realfile});
4400 =head2 test_lock(file)
4402 Returns 1 if some file is currently locked, 0 if not.
4407 my $realfile = &translate_filename($_[0]);
4408 return 0 if (!$_[0]);
4409 return 1 if (defined($main::locked_file_list{$realfile}));
4410 return 0 if (!&can_lock_file($realfile));
4412 if (open(LOCKING, "$realfile.lock")) {
4417 return $pid && kill(0, $pid);
4420 =head2 unlock_all_files
4422 Unlocks all files locked by the current script.
4425 sub unlock_all_files
4427 foreach $f (keys %main::locked_file_list) {
4432 =head2 can_lock_file(file)
4434 Returns 1 if some file should be locked, based on the settings in the
4435 Webmin Configuration module. For internal use by lock_file only.
4440 if (&is_readonly_mode()) {
4441 return 0; # never lock in read-only mode
4443 elsif ($gconfig{'lockmode'} == 0) {
4446 elsif ($gconfig{'lockmode'} == 1) {
4450 # Check if under any of the directories
4452 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4453 if (&same_file($d, $_[0]) ||
4454 &is_under_directory($d, $_[0])) {
4458 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4462 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4464 Log some action taken by a user. This is typically called at the end of a
4465 script, once all file changes are complete and all commands run. The
4468 =item action - A short code for the action being performed, like 'create'.
4470 =item type - A code for the type of object the action is performed to, like 'user'.
4472 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4474 =item params - A hash ref of additional information about the action.
4476 =item module - Name of the module in which the action was performed, which defaults to the current module.
4478 =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.
4480 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4482 =item client-ip - IP address of the browser that performed the action.
4487 return if (!$gconfig{'log'} || &is_readonly_mode());
4488 my $m = $_[4] ? $_[4] : &get_module_name();
4490 if ($gconfig{'logclear'}) {
4491 # check if it is time to clear the log
4492 my @st = stat("$webmin_logfile.time");
4493 my $write_logtime = 0;
4495 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4496 # clear logfile and all diff files
4497 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4498 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4499 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4500 unlink($webmin_logfile);
4507 if ($write_logtime) {
4508 open(LOGTIME, ">$webmin_logfile.time");
4509 print LOGTIME time(),"\n";
4514 # If an action script directory is defined, call the appropriate scripts
4515 if ($gconfig{'action_script_dir'}) {
4516 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4517 my ($basedir) = $gconfig{'action_script_dir'};
4519 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4522 opendir(DIR, $dir) or die "Can't open $dir: $!";
4523 while (defined($file = readdir(DIR))) {
4524 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4525 if (-x "$dir/$file") {
4526 # Call a script notifying it of the action
4528 $ENV{'ACTION_MODULE'} = &get_module_name();
4529 $ENV{'ACTION_ACTION'} = $_[0];
4530 $ENV{'ACTION_TYPE'} = $_[1];
4531 $ENV{'ACTION_OBJECT'} = $_[2];
4532 $ENV{'ACTION_SCRIPT'} = $script_name;
4533 foreach my $p (keys %param) {
4534 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4536 system("$dir/$file", @_,
4537 "<$null_file", ">$null_file", "2>&1");
4545 # should logging be done at all?
4546 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4547 split(/\s+/, $gconfig{'logusers'})) < 0);
4548 return if ($gconfig{'logmodules'} && &indexof($m,
4549 split(/\s+/, $gconfig{'logmodules'})) < 0);
4553 my @tm = localtime($now);
4554 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4555 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4556 $main::action_id_count++;
4557 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4558 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4559 $tm[2], $tm[1], $tm[0],
4560 $remote_user || '-',
4561 $main::session_id || '-',
4562 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4563 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4564 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4566 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4567 my $v = $_[3]->{$k};
4573 elsif (ref($v) eq 'ARRAY') {
4577 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4578 $line .= " $k='$vv'";
4582 foreach $vv (split(/\0/, $v)) {
4584 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4585 $line .= " $k='$vv'";
4588 $param{$k} = join(" ", @pv);
4590 open(WEBMINLOG, ">>$webmin_logfile");
4591 print WEBMINLOG $line,"\n";
4593 if ($gconfig{'logperms'}) {
4594 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4597 chmod(0600, $webmin_logfile);
4600 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4601 # Find and record the changes made to any locked files, or commands run
4603 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4604 foreach my $d (@main::locked_file_diff) {
4605 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4606 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4607 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4608 print DIFFLOG $d->{'data'};
4610 if ($d->{'input'}) {
4611 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4612 print DIFFLOG $d->{'input'};
4615 if ($gconfig{'logperms'}) {
4616 chmod(oct($gconfig{'logperms'}),
4617 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4618 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4622 @main::locked_file_diff = undef;
4624 if ($gconfig{'logfullfiles'}) {
4625 # Save the original contents of any modified files
4627 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4628 foreach my $f (keys %main::orig_file_data) {
4629 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4630 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4631 if (!defined($main::orig_file_type{$f})) {
4632 print ORIGLOG -1," ",$f,"\n";
4635 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4637 print ORIGLOG $main::orig_file_data{$f};
4639 if ($gconfig{'logperms'}) {
4640 chmod(oct($gconfig{'logperms'}),
4641 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4645 %main::orig_file_data = undef;
4646 %main::orig_file_type = undef;
4650 if ($gconfig{'logsyslog'}) {
4651 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4652 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4653 setlogsock("inet");';
4655 # Syslog module is installed .. try to convert to a
4656 # human-readable form
4658 my $mod = &get_module_name();
4659 my $mdir = module_root_directory($mod);
4660 if (-r "$mdir/log_parser.pl") {
4661 &foreign_require($mod, "log_parser.pl");
4663 foreach my $k (keys %{$_[3]}) {
4664 my $v = $_[3]->{$k};
4665 if (ref($v) eq 'ARRAY') {
4666 $params{$k} = join("\0", @$v);
4672 $msg = &foreign_call($mod, "parse_webmin_log",
4673 $remote_user, $script_name,
4674 $_[0], $_[1], $_[2], \%params);
4675 $msg =~ s/<[^>]*>//g; # Remove tags
4677 elsif ($_[0] eq "_config_") {
4678 my %wtext = &load_language("webminlog");
4679 $msg = $wtext{'search_config'};
4681 $msg ||= "$_[0] $_[1] $_[2]";
4682 my %info = &get_module_info($m);
4683 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4688 =head2 additional_log(type, object, data, [input])
4690 Records additional log data for an upcoming call to webmin_log, such
4691 as a command that was run or SQL that was executed. Typically you will never
4692 need to call this function directory.
4697 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4698 push(@main::locked_file_diff,
4699 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4700 'input' => $_[3] } );
4704 =head2 webmin_debug_log(type, message)
4706 Write something to the Webmin debug log. For internal use only.
4709 sub webmin_debug_log
4711 my ($type, $msg) = @_;
4712 return 0 if (!$main::opened_debug_log);
4713 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4715 my @tm = localtime($now);
4717 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4718 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4719 $tm[2], $tm[1], $tm[0],
4720 $remote_user || "-",
4721 $ENV{'REMOTE_HOST'} || "-",
4722 &get_module_name() || "-",
4725 seek(main::DEBUGLOG, 0, 2);
4726 print main::DEBUGLOG $line."\n";
4730 =head2 system_logged(command)
4732 Just calls the Perl system() function, but also logs the command run.
4737 if (&is_readonly_mode()) {
4738 print STDERR "Vetoing command $_[0]\n";
4741 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4742 my $cmd = join(" ", @realcmd);
4744 if ($cmd =~ s/(\s*&\s*)$//) {
4747 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4748 $cmd =~ s/^\((.*)\)\s*$/$1/;
4750 &additional_log('exec', undef, $cmd);
4751 return system(@realcmd);
4754 =head2 backquote_logged(command)
4756 Executes a command and returns the output (like `command`), but also logs it.
4759 sub backquote_logged
4761 if (&is_readonly_mode()) {
4763 print STDERR "Vetoing command $_[0]\n";
4766 my $realcmd = &translate_command($_[0]);
4769 if ($cmd =~ s/(\s*&\s*)$//) {
4772 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4773 $cmd =~ s/^\((.*)\)\s*$/$1/;
4775 &additional_log('exec', undef, $cmd);
4776 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4780 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4782 Runs some command, waiting at most the given number of seconds for it to
4783 complete, and returns the output. The maxlines parameter sets the number
4784 of lines of output to capture. The safe parameter should be set to 1 if the
4785 command is safe for read-only mode users to run.
4788 sub backquote_with_timeout
4790 my $realcmd = &translate_command($_[0]);
4791 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4792 if ($gconfig{'debug_what_cmd'});
4794 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4799 my $elapsed = time() - $start;
4800 last if ($elapsed > $_[1]);
4802 vec($rmask, fileno(OUT), 1) = 1;
4803 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4804 last if (!$sel || $sel < 0);
4806 last if (!defined($line));
4809 if ($_[3] && $linecount >= $_[3]) {
4814 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4818 return wantarray ? ($out, $timed_out) : $out;
4821 =head2 backquote_command(command, safe?)
4823 Executes a command and returns the output (like `command`), subject to
4824 command translation. The safe parameter should be set to 1 if the command
4825 is safe for read-only mode users to run.
4828 sub backquote_command
4830 if (&is_readonly_mode() && !$_[1]) {
4831 print STDERR "Vetoing command $_[0]\n";
4835 my $realcmd = &translate_command($_[0]);
4836 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4840 =head2 kill_logged(signal, pid, ...)
4842 Like Perl's built-in kill function, but also logs the fact that some process
4843 was killed. On Windows, falls back to calling process.exe to terminate a
4849 return scalar(@_)-1 if (&is_readonly_mode());
4850 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4851 if ($gconfig{'debug_what_procs'});
4852 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4853 if ($gconfig{'os_type'} eq 'windows') {
4854 # Emulate some kills with process.exe
4855 my $arg = $_[0] eq "KILL" ? "-k" :
4856 $_[0] eq "TERM" ? "-q" :
4857 $_[0] eq "STOP" ? "-s" :
4858 $_[0] eq "CONT" ? "-r" : undef;
4860 foreach my $p (@_[1..@_-1]) {
4862 $ok ||= kill($_[0], $p);
4865 &execute_command("process $arg $p");
4877 =head2 rename_logged(old, new)
4879 Re-names a file and logs the rename. If the old and new files are on different
4880 filesystems, calls mv or the Windows rename function to do the job.
4885 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4886 return &rename_file($_[0], $_[1]);
4889 =head2 rename_file(old, new)
4891 Renames a file or directory. If the old and new files are on different
4892 filesystems, calls mv or the Windows rename function to do the job.
4897 if (&is_readonly_mode()) {
4898 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4901 my $src = &translate_filename($_[0]);
4902 my $dst = &translate_filename($_[1]);
4903 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4904 if ($gconfig{'debug_what_ops'});
4905 my $ok = rename($src, $dst);
4906 if (!$ok && $! !~ /permission/i) {
4907 # Try the mv command, in case this is a cross-filesystem rename
4908 if ($gconfig{'os_type'} eq 'windows') {
4909 # Need to use rename
4910 my $out = &backquote_command("rename ".quotemeta($_[0]).
4911 " ".quotemeta($_[1])." 2>&1");
4913 $! = $out if (!$ok);
4917 my $out = &backquote_command("mv ".quotemeta($_[0]).
4918 " ".quotemeta($_[1])." 2>&1");
4920 $! = $out if (!$ok);
4926 =head2 symlink_logged(src, dest)
4928 Create a symlink, and logs it. Effectively does the same thing as the Perl
4935 my $rv = &symlink_file($_[0], $_[1]);
4936 &unlock_file($_[1]);
4940 =head2 symlink_file(src, dest)
4942 Creates a soft link, unless in read-only mode. Effectively does the same thing
4943 as the Perl symlink function.
4948 if (&is_readonly_mode()) {
4949 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4952 my $src = &translate_filename($_[0]);
4953 my $dst = &translate_filename($_[1]);
4954 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
4955 if ($gconfig{'debug_what_ops'});
4956 return symlink($src, $dst);
4959 =head2 link_file(src, dest)
4961 Creates a hard link, unless in read-only mode. The existing new link file
4962 will be deleted if necessary. Effectively the same as Perl's link function.
4967 if (&is_readonly_mode()) {
4968 print STDERR "Vetoing link from $_[0] to $_[1]\n";
4971 my $src = &translate_filename($_[0]);
4972 my $dst = &translate_filename($_[1]);
4973 &webmin_debug_log('LINK', "src=$src dst=$dst")
4974 if ($gconfig{'debug_what_ops'});
4975 unlink($dst); # make sure link works
4976 return link($src, $dst);
4979 =head2 make_dir(dir, perms, recursive)
4981 Creates a directory and sets permissions on it, unless in read-only mode.
4982 The perms parameter sets the octal permissions to apply, which unlike Perl's
4983 mkdir will really get set. The recursive flag can be set to 1 to have the
4984 function create parent directories too.
4989 my ($dir, $perms, $recur) = @_;
4990 if (&is_readonly_mode()) {
4991 print STDERR "Vetoing directory $dir\n";
4994 $dir = &translate_filename($dir);
4995 my $exists = -d $dir ? 1 : 0;
4996 return 1 if ($exists && $recur); # already exists
4997 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
4998 my $rv = mkdir($dir, $perms);
4999 if (!$rv && $recur) {
5000 # Failed .. try mkdir -p
5001 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5002 my $ex = &execute_command("mkdir $param "."e_path($dir));
5008 chmod($perms, $dir);
5013 =head2 set_ownership_permissions(user, group, perms, file, ...)
5015 Sets the user, group owner and permissions on some files. The parameters are :
5017 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5019 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5021 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5023 =item file - One or more files or directories to modify.
5026 sub set_ownership_permissions
5028 my ($user, $group, $perms, @files) = @_;
5029 if (&is_readonly_mode()) {
5030 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5033 @files = map { &translate_filename($_) } @files;
5034 if ($gconfig{'debug_what_ops'}) {
5035 foreach my $f (@files) {
5036 &webmin_debug_log('PERMS',
5037 "file=$f user=$user group=$group perms=$perms");
5041 if (defined($user)) {
5042 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5044 if (defined($group)) {
5045 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5048 my @uinfo = getpwuid($uid);
5051 $rv = chown($uid, $gid, @files);
5053 if ($rv && defined($perms)) {
5054 $rv = chmod($perms, @files);
5059 =head2 unlink_logged(file, ...)
5061 Like Perl's unlink function, but locks the files beforehand and un-locks them
5062 after so that the deletion is logged by Webmin.
5068 foreach my $f (@_) {
5069 if (!&test_lock($f)) {
5074 my @rv = &unlink_file(@_);
5075 foreach my $f (@_) {
5080 return wantarray ? @rv : $rv[0];
5083 =head2 unlink_file(file, ...)
5085 Deletes some files or directories. Like Perl's unlink function, but also
5086 recursively deletes directories with the rm command if needed.
5091 return 1 if (&is_readonly_mode());
5094 foreach my $f (@_) {
5095 my $realf = &translate_filename($f);
5096 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5098 if (!rmdir($realf)) {
5099 if ($gconfig{'os_type'} eq 'windows') {
5100 # Call del and rmdir commands
5103 my $out = `del /q "$qm" 2>&1`;
5105 $out = `rmdir "$qm" 2>&1`;
5110 my $qm = quotemeta($realf);
5111 my $out = `rm -rf $qm 2>&1`;
5120 if (!unlink($realf)) {
5126 return wantarray ? ($rv, $err) : $rv;
5129 =head2 copy_source_dest(source, dest)
5131 Copy some file or directory to a new location. Returns 1 on success, or 0
5132 on failure - also sets $! on failure. If the source is a directory, uses
5133 piped tar commands to copy a whole directory structure including permissions
5137 sub copy_source_dest
5139 return (1, undef) if (&is_readonly_mode());
5140 my ($src, $dst) = @_;
5143 &webmin_debug_log('COPY', "src=$src dst=$dst")
5144 if ($gconfig{'debug_what_ops'});
5145 if ($gconfig{'os_type'} eq 'windows') {
5146 # No tar or cp on windows, so need to use copy command
5150 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5153 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5161 # A directory .. need to copy with tar command
5162 my @st = stat($src);
5165 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5166 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5173 # Can just copy with cp
5174 my $out = &backquote_logged("cp -p ".quotemeta($src).
5175 " ".quotemeta($dst)." 2>&1");
5181 return wantarray ? ($ok, $err) : $ok;
5184 =head2 remote_session_name(host|&server)
5186 Generates a session ID for some server. For this server, this will always
5187 be an empty string. For a server object it will include the hostname and
5188 port and PID. For a server name, it will include the hostname and PID. For
5192 sub remote_session_name
5194 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5195 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5196 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5197 ref($_[0]) ? "" : "$_[0].$$";
5200 =head2 remote_foreign_require(server, module, file)
5202 Connects to rpc.cgi on a remote webmin server and have it open a session
5203 to a process that will actually do the require and run functions. This is the
5204 equivalent for foreign_require, but for a remote Webmin system. The server
5205 parameter can either be a hostname of a system registered in the Webmin
5206 Servers Index module, or a hash reference for a system from that module.
5209 sub remote_foreign_require
5211 my $call = { 'action' => 'require',
5214 my $sn = &remote_session_name($_[0]);
5215 if ($remote_session{$sn}) {
5216 $call->{'session'} = $remote_session{$sn};
5219 $call->{'newsession'} = 1;
5221 my $rv = &remote_rpc_call($_[0], $call);
5222 if ($rv->{'session'}) {
5223 $remote_session{$sn} = $rv->{'session'};
5224 $remote_session_server{$sn} = $_[0];
5228 =head2 remote_foreign_call(server, module, function, [arg]*)
5230 Call a function on a remote server. Must have been setup first with
5231 remote_foreign_require for the same server and module. Equivalent to
5232 foreign_call, but with the extra server parameter to specify the remote
5236 sub remote_foreign_call
5238 return undef if (&is_readonly_mode());
5239 my $sn = &remote_session_name($_[0]);
5240 return &remote_rpc_call($_[0], { 'action' => 'call',
5243 'session' => $remote_session{$sn},
5244 'args' => [ @_[3 .. $#_] ] } );
5247 =head2 remote_foreign_check(server, module, [api-only])
5249 Checks if some module is installed and supported on a remote server. Equivilant
5250 to foreign_check, but for the remote Webmin system specified by the server
5254 sub remote_foreign_check
5256 return &remote_rpc_call($_[0], { 'action' => 'check',
5261 =head2 remote_foreign_config(server, module)
5263 Gets the configuration for some module from a remote server, as a hash.
5264 Equivalent to foreign_config, but for a remote system.
5267 sub remote_foreign_config
5269 return &remote_rpc_call($_[0], { 'action' => 'config',
5270 'module' => $_[1] });
5273 =head2 remote_eval(server, module, code)
5275 Evaluates some perl code in the context of a module on a remote webmin server.
5276 The server parameter must be the hostname of a remote system, module must
5277 be a module directory name, and code a string of Perl code to run. This can
5278 only be called after remote_foreign_require for the same server and module.
5283 return undef if (&is_readonly_mode());
5284 my $sn = &remote_session_name($_[0]);
5285 return &remote_rpc_call($_[0], { 'action' => 'eval',
5288 'session' => $remote_session{$sn} });
5291 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5293 Transfers some local file to another server via Webmin's RPC protocol, and
5294 returns the resulting remote filename. If the remotefile parameter is given,
5295 that is the destination filename which will be used. Otherwise a randomly
5296 selected temporary filename will be used, and returned by the function.
5301 return undef if (&is_readonly_mode());
5303 my $sn = &remote_session_name($_[0]);
5304 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5305 # Copy data over TCP connection
5306 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5308 'name' => $_[3] } );
5310 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5311 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5312 return &$main::remote_error_handler("Failed to transfer file : $error")
5315 while(read(FILE, $got, 1024) > 0) {
5319 shutdown(TWRITE, 1);
5321 if ($error && $error !~ /^OK/) {
5322 # Got back an error!
5323 return &$main::remote_error_handler("Failed to transfer file : $error");
5329 # Just pass file contents as parameters
5331 while(read(FILE, $got, 1024) > 0) {
5335 return &remote_rpc_call($_[0], { 'action' => 'write',
5338 'session' => $remote_session{$sn} });
5342 =head2 remote_read(server, localfile, remotefile)
5344 Transfers a file from a remote server to this system, using Webmin's RPC
5345 protocol. The server parameter must be the hostname of a system registered
5346 in the Webmin Servers Index module, localfile is the destination path on this
5347 system, and remotefile is the file to fetch from the remote server.
5352 my $sn = &remote_session_name($_[0]);
5353 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5354 # Copy data over TCP connection
5355 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5356 'file' => $_[2] } );
5358 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5361 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5362 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5363 return &$main::remote_error_handler("Failed to transfer file : $error")
5366 open(FILE, ">$_[1]");
5367 while(read(TREAD, $got, 1024) > 0) {
5374 # Just get data as return value
5375 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5377 'session' => $remote_session{$sn} });
5378 open(FILE, ">$_[1]");
5384 =head2 remote_finished
5386 Close all remote sessions. This happens automatically after a while
5387 anyway, but this function should be called to clean things up faster.
5392 foreach my $sn (keys %remote_session) {
5393 my $server = $remote_session_server{$sn};
5394 &remote_rpc_call($server, { 'action' => 'quit',
5395 'session' => $remote_session{$sn} } );
5396 delete($remote_session{$sn});
5397 delete($remote_session_server{$sn});
5399 foreach $fh (keys %fast_fh_cache) {
5401 delete($fast_fh_cache{$fh});
5405 =head2 remote_error_setup(&function)
5407 Sets a function to be called instead of &error when a remote RPC operation
5408 fails. Useful if you want to have more control over your remote operations.
5411 sub remote_error_setup
5413 $main::remote_error_handler = $_[0] || \&error;
5416 =head2 remote_rpc_call(server, structure)
5418 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5419 and then reads back a reply structure. This is mainly for internal use only,
5420 and is called by the other remote_* functions.
5426 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5428 # Server structure was given
5430 $serv->{'user'} || $serv->{'id'} == 0 ||
5431 return &$main::remote_error_handler(
5432 "No Webmin login set for server");
5435 # lookup the server in the webmin servers module if needed
5436 if (!defined(%main::remote_servers_cache)) {
5437 &foreign_require("servers", "servers-lib.pl");
5438 foreach $s (&foreign_call("servers", "list_servers")) {
5439 $main::remote_servers_cache{$s->{'host'}} = $s;
5440 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5443 $serv = $main::remote_servers_cache{$_[0]};
5444 $serv || return &$main::remote_error_handler(
5445 "No Webmin Servers entry for $_[0]");
5446 $serv->{'user'} || return &$main::remote_error_handler(
5447 "No login set for server $_[0]");
5450 # Work out the username and password
5452 if ($serv->{'sameuser'}) {
5453 $user = $remote_user;
5454 defined($main::remote_pass) || return &$main::remote_error_handler(
5455 "Password for this server is not available");
5456 $pass = $main::remote_pass;
5459 $user = $serv->{'user'};
5460 $pass = $serv->{'pass'};
5463 if ($serv->{'fast'} || !$sn) {
5464 # Make TCP connection call to fastrpc.cgi
5465 if (!$fast_fh_cache{$sn} && $sn) {
5466 # Need to open the connection
5467 my $con = &make_http_connection(
5468 $serv->{'host'}, $serv->{'port'}, $serv->{'ssl'},
5469 "POST", "/fastrpc.cgi");
5470 return &$main::remote_error_handler(
5471 "Failed to connect to $serv->{'host'} : $con")
5473 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5474 &write_http_connection($con, "User-agent: Webmin\r\n");
5475 my $auth = &encode_base64("$user:$pass");
5477 &write_http_connection($con, "Authorization: basic $auth\r\n");
5478 &write_http_connection($con, "Content-length: ",
5479 length($tostr),"\r\n");
5480 &write_http_connection($con, "\r\n");
5481 &write_http_connection($con, $tostr);
5483 # read back the response
5484 my $line = &read_http_connection($con);
5485 $line =~ tr/\r\n//d;
5486 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5487 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5489 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5490 return &$main::remote_error_handler("HTTP error : $line");
5492 $line = &read_http_connection($con);
5493 $line =~ tr/\r\n//d;
5495 $line = &read_http_connection($con);
5496 if ($line =~ /^0\s+(.*)/) {
5497 return &$main::remote_error_handler("RPC error : $1");
5499 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5500 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5501 # Started ok .. connect and save SID
5502 &close_http_connection($con);
5503 my ($port, $sid, $version, $error) = ($1, $2, $3);
5504 &open_socket($serv->{'host'}, $port, $sid, \$error);
5505 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5507 $fast_fh_cache{$sn} = $sid;
5508 $remote_server_version{$sn} = $version;
5511 while($stuff = &read_http_connection($con)) {
5514 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5517 elsif (!$fast_fh_cache{$sn}) {
5518 # Open the connection by running fastrpc.cgi locally
5519 pipe(RPCOUTr, RPCOUTw);
5523 open(STDOUT, ">&RPCOUTw");
5527 $ENV{'REQUEST_METHOD'} = 'GET';
5528 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5529 $ENV{'SERVER_ROOT'} ||= $root_directory;
5531 if ($base_remote_user ne 'root' &&
5532 $base_remote_user ne 'admin') {
5533 # Need to fake up a login for the CGI!
5534 &read_acl(undef, \%acl);
5535 $ENV{'BASE_REMOTE_USER'} =
5536 $ENV{'REMOTE_USER'} =
5537 $acl{'root'} ? 'root' : 'admin';
5539 delete($ENV{'FOREIGN_MODULE_NAME'});
5540 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5541 chdir($root_directory);
5542 if (!exec("$root_directory/fastrpc.cgi")) {
5543 print "exec failed : $!\n";
5550 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5554 if ($line =~ /^0\s+(.*)/) {
5555 return &$main::remote_error_handler("RPC error : $2");
5557 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5558 # Started ok .. connect and save SID
5560 my ($port, $sid, $error) = ($1, $2, undef);
5561 &open_socket("localhost", $port, $sid, \$error);
5562 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5563 $fast_fh_cache{$sn} = $sid;
5570 &error("Bad response from fastrpc.cgi : $line");
5573 # Got a connection .. send off the request
5574 my $fh = $fast_fh_cache{$sn};
5575 my $tostr = &serialise_variable($_[1]);
5576 print $fh length($tostr)," $fh\n";
5578 my $rlen = int(<$fh>);
5579 my ($fromstr, $got);
5580 while(length($fromstr) < $rlen) {
5581 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5582 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5585 my $from = &unserialise_variable($fromstr);
5587 return &$main::remote_error_handler("Remote Webmin error");
5589 if (defined($from->{'arv'})) {
5590 return @{$from->{'arv'}};
5593 return $from->{'rv'};
5597 # Call rpc.cgi on remote server
5598 my $tostr = &serialise_variable($_[1]);
5600 my $con = &make_http_connection($serv->{'host'}, $serv->{'port'},
5601 $serv->{'ssl'}, "POST", "/rpc.cgi");
5602 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5604 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5605 &write_http_connection($con, "User-agent: Webmin\r\n");
5606 my $auth = &encode_base64("$user:$pass");
5608 &write_http_connection($con, "Authorization: basic $auth\r\n");
5609 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5610 &write_http_connection($con, "\r\n");
5611 &write_http_connection($con, $tostr);
5613 # read back the response
5614 my $line = &read_http_connection($con);
5615 $line =~ tr/\r\n//d;
5616 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5617 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5619 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5621 $line = &read_http_connection($con);
5622 $line =~ tr/\r\n//d;
5625 while($line = &read_http_connection($con)) {
5629 my $from = &unserialise_variable($fromstr);
5630 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5631 if (defined($from->{'arv'})) {
5632 return @{$from->{'arv'}};
5635 return $from->{'rv'};
5640 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5642 Executes some function in parallel on multiple servers at once. Fills in
5643 the returns and errors arrays respectively. If the module and library
5644 parameters are given, that module is remotely required on the server first,
5645 to check if it is connectable. The parameters are :
5647 =item servers - A list of Webmin system hash references.
5649 =item parallel - Number of parallel operations to perform.
5651 =item function - Reference to function to call for each system.
5653 =item args - Additional parameters to the function.
5655 =item returns - Array ref to place return values into, in same order as servers.
5657 =item errors - Array ref to place error messages into.
5659 =item module - Optional module to require on the remote system first.
5661 =item library - Optional library to require in the module.
5664 sub remote_multi_callback
5666 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5667 &remote_error_setup(\&remote_multi_callback_error);
5669 # Call the functions
5671 foreach my $g (@$servs) {
5677 $remote_multi_callback_err = undef;
5679 # Require the remote lib
5680 &remote_foreign_require($g->{'host'}, $mod, $lib);
5681 if ($remote_multi_callback_err) {
5682 # Failed .. return error
5683 print $wh &serialise_variable(
5684 [ undef, $remote_multi_callback_err ]);
5690 my $a = ref($args) ? $args->[$p] : $args;
5691 my $rv = &$func($g, $a);
5694 print $wh &serialise_variable(
5695 [ $rv, $remote_multi_callback_err ]);
5703 # Read back the results
5705 foreach my $g (@$servs) {
5709 $errs->[$p] = "Failed to read response from $g->{'host'}";
5712 my $rv = &unserialise_variable($line);
5714 $rets->[$p] = $rv->[0];
5715 $errs->[$p] = $rv->[1];
5720 &remote_error_setup(undef);
5723 sub remote_multi_callback_error
5725 $remote_multi_callback_err = $_[0];
5728 =head2 serialise_variable(variable)
5730 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5731 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5732 called on each member to serialize the entire object.
5735 sub serialise_variable
5737 if (!defined($_[0])) {
5743 $rv = &urlize($_[0]);
5745 elsif ($r eq 'SCALAR') {
5746 $rv = &urlize(${$_[0]});
5748 elsif ($r eq 'ARRAY') {
5749 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5751 elsif ($r eq 'HASH') {
5752 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5753 &urlize(&serialise_variable($_[0]->{$_})) }
5756 elsif ($r eq 'REF') {
5757 $rv = &serialise_variable(${$_[0]});
5759 elsif ($r eq 'CODE') {
5764 # An object - treat as a hash
5765 $r = "OBJECT ".&urlize($r);
5766 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5767 &urlize(&serialise_variable($_[0]->{$_})) }
5770 return ($r ? $r : 'VAL').",".$rv;
5773 =head2 unserialise_variable(string)
5775 Converts a string created by serialise_variable() back into the original
5776 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5777 object, the same class is used on this system, if available.
5780 sub unserialise_variable
5782 my @v = split(/,/, $_[0]);
5784 if ($v[0] eq 'VAL') {
5785 @v = split(/,/, $_[0], -1);
5786 $rv = &un_urlize($v[1]);
5788 elsif ($v[0] eq 'SCALAR') {
5789 local $r = &un_urlize($v[1]);
5792 elsif ($v[0] eq 'ARRAY') {
5794 for(my $i=1; $i<@v; $i++) {
5795 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5798 elsif ($v[0] eq 'HASH') {
5800 for(my $i=1; $i<@v; $i+=2) {
5801 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5802 &unserialise_variable(&un_urlize($v[$i+1]));
5805 elsif ($v[0] eq 'REF') {
5806 local $r = &unserialise_variable($v[1]);
5809 elsif ($v[0] eq 'UNDEF') {
5812 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5813 # An object hash that we have to re-bless
5816 for(my $i=1; $i<@v; $i+=2) {
5817 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5818 &unserialise_variable(&un_urlize($v[$i+1]));
5826 =head2 other_groups(user)
5828 Returns a list of secondary groups a user is a member of, as a list of
5837 while(my @g = getgrent()) {
5838 my @m = split(/\s+/, $g[3]);
5839 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5841 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5845 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5847 Returns HTML for a button that pops up a data chooser window. The parameters
5850 =item dayfield - Name of the text field to place the day of the month into.
5852 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5854 =item yearfield - Name of the text field to place the year into.
5857 sub date_chooser_button
5859 return &theme_date_chooser_button(@_)
5860 if (defined(&theme_date_chooser_button));
5861 my ($w, $h) = (250, 225);
5862 if ($gconfig{'db_sizedate'}) {
5863 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5865 return "<input type=button onClick='window.dfield = form.$_[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";
5868 =head2 help_file(module, file)
5870 Returns the path to a module's help file of some name, typically under the
5871 help directory with a .html extension.
5876 my $mdir = &module_root_directory($_[0]);
5877 my $dir = "$mdir/help";
5878 foreach my $o (@lang_order_list) {
5879 my $lang = "$dir/$_[1].$current_lang.html";
5880 return $lang if (-r $lang);
5882 return "$dir/$_[1].html";
5887 Seeds the random number generator, if not already done in this script. On Linux
5888 this makes use of the current time, process ID and a read from /dev/urandom.
5889 On other systems, only the current time and process ID are used.
5894 if (!$main::done_seed_random) {
5895 if (open(RANDOM, "/dev/urandom")) {
5897 read(RANDOM, $buf, 4);
5899 srand(time() ^ $$ ^ $buf);
5904 $main::done_seed_random = 1;
5908 =head2 disk_usage_kb(directory)
5910 Returns the number of kB used by some directory and all subdirs. Implemented
5911 by calling the C<du -k> command.
5916 my $dir = &translate_filename($_[0]);
5918 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5920 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5922 return $out =~ /^([0-9]+)/ ? $1 : "???";
5925 =head2 recursive_disk_usage(directory)
5927 Returns the number of bytes taken up by all files in some directory and all
5928 sub-directories, by summing up their lengths. The disk_usage_kb is more
5929 reflective of reality, as the filesystem typically pads file sizes to 1k or
5933 sub recursive_disk_usage
5935 my $dir = &translate_filename($_[0]);
5940 my @st = stat($dir);
5946 my @files = readdir(DIR);
5948 foreach my $f (@files) {
5949 next if ($f eq "." || $f eq "..");
5950 $rv += &recursive_disk_usage("$dir/$f");
5956 =head2 help_search_link(term, [ section, ... ] )
5958 Returns HTML for a link to the man module for searching local and online
5959 docs for various search terms. The term parameter can either be a single
5960 word like 'bind', or a space-separated list of words. This function is typically
5961 used by modules that want to refer users to additional documentation in man
5962 pages or local system doc files.
5965 sub help_search_link
5967 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
5968 my $for = &urlize(shift(@_));
5969 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
5970 join("&", map { "section=$_" } @_)."&".
5971 "for=$for&exact=1&check=".&get_module_name()."'>".
5972 $text{'helpsearch'}."</a>\n";
5979 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
5981 Opens a connection to some HTTP server, maybe through a proxy, and returns
5982 a handle object. The handle can then be used to send additional headers
5983 and read back a response. If anything goes wrong, returns an error string.
5984 The parameters are :
5986 =item host - Hostname or IP address of the webserver to connect to.
5988 =item port - HTTP port number to connect to.
5990 =item ssl - Set to 1 to connect in SSL mode.
5992 =item method - HTTP method, like GET or POST.
5994 =item page - Page to request on the webserver, like /foo/index.html
5996 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
5999 sub make_http_connection
6001 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6004 foreach my $h (@$headers) {
6005 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6009 if (&is_readonly_mode()) {
6010 return "HTTP connections not allowed in readonly mode";
6012 my $rv = { 'fh' => time().$$ };
6015 eval "use Net::SSLeay";
6016 $@ && return $text{'link_essl'};
6017 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6018 eval "Net::SSLeay::load_error_strings()";
6019 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6020 return "Failed to create SSL context";
6021 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6022 return "Failed to create SSL connection";
6024 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6025 !&no_proxy($host)) {
6028 &open_socket($1, $2, $rv->{'fh'}, \$error);
6031 my $fh = $rv->{'fh'};
6032 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6033 if ($gconfig{'proxy_user'}) {
6034 my $auth = &encode_base64(
6035 "$gconfig{'proxy_user'}:".
6036 "$gconfig{'proxy_pass'}");
6037 $auth =~ tr/\r\n//d;
6038 print $fh "Proxy-Authorization: Basic $auth\r\n";
6042 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6043 return "Proxy error : $3" if ($2 != 200);
6046 return "Proxy error : $line";
6051 elsif (!$gconfig{'proxy_fallback'}) {
6052 # Connection to proxy failed - give up
6059 &open_socket($host, $port, $rv->{'fh'}, \$error);
6060 return $error if ($error);
6062 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6063 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6064 return "SSL connect() failed";
6065 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6066 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6069 # Plain HTTP request
6071 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6072 !&no_proxy($host)) {
6075 &open_socket($1, $2, $rv->{'fh'}, \$error);
6079 my $fh = $rv->{'fh'};
6080 my $rtxt = $method." ".
6081 "http://$host:$port$page HTTP/1.0\r\n";
6082 if ($gconfig{'proxy_user'}) {
6083 my $auth = &encode_base64(
6084 "$gconfig{'proxy_user'}:".
6085 "$gconfig{'proxy_pass'}");
6086 $auth =~ tr/\r\n//d;
6087 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6092 elsif (!$gconfig{'proxy_fallback'}) {
6097 # Connecting directly
6099 &open_socket($host, $port, $rv->{'fh'}, \$error);
6100 return $error if ($error);
6101 my $fh = $rv->{'fh'};
6102 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6109 =head2 read_http_connection(&handle, [bytes])
6111 Reads either one line or up to the specified number of bytes from the handle,
6112 originally supplied by make_http_connection.
6115 sub read_http_connection
6119 if ($h->{'ssl_con'}) {
6122 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6123 # need to read more..
6124 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6126 $rv = $h->{'buffer'};
6127 delete($h->{'buffer'});
6130 $h->{'buffer'} .= $more;
6132 $rv = substr($h->{'buffer'}, 0, $idx+1);
6133 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6136 if (length($h->{'buffer'})) {
6137 $rv = $h->{'buffer'};
6138 delete($h->{'buffer'});
6141 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6147 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6150 my $fh = $h->{'fh'};
6154 $rv = undef if ($rv eq "");
6158 =head2 write_http_connection(&handle, [data+])
6160 Writes the given data to the given HTTP connection handle.
6163 sub write_http_connection
6166 my $fh = $h->{'fh'};
6168 if ($h->{'ssl_ctx'}) {
6169 foreach my $s (@_) {
6170 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6171 $allok = 0 if (!$ok);
6175 my $ok = (print $fh @_);
6176 $allok = 0 if (!$ok);
6181 =head2 close_http_connection(&handle)
6183 Closes a connection to an HTTP server, identified by the given handle.
6186 sub close_http_connection
6191 =head2 clean_environment
6193 Deletes any environment variables inherited from miniserv so that they
6194 won't be passed to programs started by webmin. This is useful when calling
6195 programs that check for CGI-related environment variables and modify their
6196 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6199 sub clean_environment
6201 %UNCLEAN_ENV = %ENV;
6202 foreach my $k (keys %ENV) {
6203 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6207 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6208 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6209 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6210 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6211 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6212 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6213 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6214 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD') {
6219 =head2 reset_environment
6221 Puts the environment back how it was before clean_environment was callled.
6224 sub reset_environment
6226 if (defined(%UNCLEAN_ENV)) {
6227 foreach my $k (keys %UNCLEAN_ENV) {
6228 $ENV{$k} = $UNCLEAN_ENV{$k};
6230 undef(%UNCLEAN_ENV);
6234 =head2 progress_callback
6236 Never called directly, but useful for passing to &http_download to print
6237 out progress of an HTTP request.
6240 sub progress_callback
6242 if (defined(&theme_progress_callback)) {
6243 # Call the theme override
6244 return &theme_progress_callback(@_);
6248 print $progress_callback_prefix;
6250 $progress_size = $_[1];
6251 $progress_step = int($_[1] / 10);
6252 print &text('progress_size', $progress_callback_url,
6253 $progress_size),"<br>\n";
6256 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6258 $last_progress_time = $last_progress_size = undef;
6260 elsif ($_[0] == 3) {
6262 my $sp = $progress_callback_prefix.(" " x 5);
6263 if ($progress_size) {
6264 # And we have a size to compare against
6265 my $st = int(($_[1] * 10) / $progress_size);
6266 my $time_now = time();
6267 if ($st != $progress_step ||
6268 $time_now - $last_progress_time > 60) {
6269 # Show progress every 10% or 60 seconds
6270 print $sp,&text('progress_data', $_[1], int($_[1]*100/$progress_size)),"<br>\n";
6271 $last_progress_time = $time_now;
6273 $progress_step = $st;
6276 # No total size .. so only show in 100k jumps
6277 if ($_[1] > $last_progress_size+100*1024) {
6278 print $sp,&text('progress_data2', $_[1]),"<br>\n";
6279 $last_progress_size = $_[1];
6283 elsif ($_[0] == 4) {
6284 # All done downloading
6285 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6287 elsif ($_[0] == 5) {
6288 # Got new location after redirect
6289 $progress_callback_url = $_[1];
6291 elsif ($_[0] == 6) {
6293 $progress_callback_url = $_[1];
6294 print &text('progress_incache', $progress_callback_url),"<br>\n";
6298 =head2 switch_to_remote_user
6300 Changes the user and group of the current process to that of the unix user
6301 with the same name as the current webmin login, or fails if there is none.
6302 This should be called by Usermin module scripts that only need to run with
6303 limited permissions.
6306 sub switch_to_remote_user
6308 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6310 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6311 &create_missing_homedir(\@remote_user_info);
6313 &switch_to_unix_user(\@remote_user_info);
6314 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6315 $ENV{'HOME'} = $remote_user_info[7];
6317 # Export global variables to caller
6318 if ($main::export_to_caller) {
6319 my ($callpkg) = caller();
6320 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6324 =head2 switch_to_unix_user(&user-details)
6326 Switches the current process to the UID and group ID from the given list
6327 of user details, which must be in the format returned by getpwnam.
6330 sub switch_to_unix_user
6333 if (!defined($uinfo->[0])) {
6334 # No username given, so just use given GID
6335 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6338 # Use all groups from user
6339 ($(, $)) = ( $uinfo->[3],
6340 "$uinfo->[3] ".join(" ", $uinfo->[3],
6341 &other_groups($uinfo->[0])) );
6344 POSIX::setuid($uinfo->[2]);
6346 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6347 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6351 =head2 eval_as_unix_user(username, &code)
6353 Runs some code fragment with the effective UID and GID switch to that
6354 of the given Unix user, so that file IO takes place with his permissions.
6358 sub eval_as_unix_user
6360 my ($user, $code) = @_;
6361 my @uinfo = getpwnam($user);
6362 defined(@uinfo) || &error("eval_as_unix_user called with invalid user $user");
6363 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6367 local $main::error_must_die = 1;
6374 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6377 return wantarray ? @rv : $rv[0];
6380 =head2 create_user_config_dirs
6382 Creates per-user config directories and sets $user_config_directory and
6383 $user_module_config_directory to them. Also reads per-user module configs
6384 into %userconfig. This should be called by Usermin module scripts that need
6385 to store per-user preferences or other settings.
6388 sub create_user_config_dirs
6390 return if (!$gconfig{'userconfig'});
6391 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6392 return if (!@uinfo || !$uinfo[7]);
6393 &create_missing_homedir(\@uinfo);
6394 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6395 if (!-d $user_config_directory) {
6396 mkdir($user_config_directory, 0700) ||
6397 &error("Failed to create $user_config_directory : $!");
6398 if ($< == 0 && $uinfo[2]) {
6399 chown($uinfo[2], $uinfo[3], $user_config_directory);
6402 if (&get_module_name()) {
6403 $user_module_config_directory = $user_config_directory."/".
6405 if (!-d $user_module_config_directory) {
6406 mkdir($user_module_config_directory, 0700) ||
6407 &error("Failed to create $user_module_config_directory : $!");
6408 if ($< == 0 && $uinfo[2]) {
6409 chown($uinfo[2], $uinfo[3], $user_config_directory);
6413 &read_file_cached("$module_root_directory/defaultuconfig",
6415 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6416 &read_file_cached("$user_module_config_directory/config",
6420 # Export global variables to caller
6421 if ($main::export_to_caller) {
6422 my ($callpkg) = caller();
6423 foreach my $v ('$user_config_directory',
6424 '$user_module_config_directory', '%userconfig') {
6425 my ($vt, $vn) = split('', $v, 2);
6426 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6431 =head2 create_missing_homedir(&uinfo)
6433 If auto homedir creation is enabled, create one for this user if needed.
6434 For internal use only.
6437 sub create_missing_homedir
6440 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6441 # Use has no home dir .. make one
6442 system("mkdir -p ".quotemeta($uinfo->[7]));
6443 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6444 if ($gconfig{'create_homedir_perms'} ne '') {
6445 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6450 =head2 filter_javascript(text)
6452 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6453 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6456 sub filter_javascript
6459 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6460 $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;
6461 $rv =~ s/(javascript:)/x$1/gi;
6462 $rv =~ s/(vbscript:)/x$1/gi;
6466 =head2 resolve_links(path)
6468 Given a path that may contain symbolic links, returns the real path.
6474 $path =~ s/\/+/\//g;
6475 $path =~ s/\/$// if ($path ne "/");
6476 my @p = split(/\/+/, $path);
6478 for(my $i=0; $i<@p; $i++) {
6479 my $sofar = "/".join("/", @p[0..$i]);
6480 my $lnk = readlink($sofar);
6481 if ($lnk eq $sofar) {
6482 # Link to itself! Cannot do anything more really ..
6485 elsif ($lnk =~ /^\//) {
6486 # Link is absolute..
6487 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6491 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6497 =head2 simplify_path(path, bogus)
6499 Given a path, maybe containing elements ".." and "." , convert it to a
6500 clean, absolute form. Returns undef if this is not possible.
6508 my @bits = split(/\/+/, $dir);
6511 foreach my $b (@bits) {
6515 elsif ($b eq "..") {
6517 if (scalar(@fixedbits) == 0) {
6518 # Cannot! Already at root!
6525 push(@fixedbits, $b);
6528 return "/".join('/', @fixedbits);
6531 =head2 same_file(file1, file2)
6533 Returns 1 if two files are actually the same
6538 return 1 if ($_[0] eq $_[1]);
6539 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6540 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6541 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6542 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6543 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6544 return 0 if (!@stat1 || !@stat2);
6545 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6548 =head2 flush_webmin_caches
6550 Clears all in-memory and on-disk caches used by Webmin.
6553 sub flush_webmin_caches
6555 undef(%main::read_file_cache);
6556 undef(%main::acl_hash_cache);
6557 undef(%main::acl_array_cache);
6558 undef(%main::has_command_cache);
6559 undef(@main::list_languages_cache);
6560 undef($main::got_list_usermods_cache);
6561 undef(@main::list_usermods_cache);
6562 undef(%main::foreign_installed_cache);
6563 unlink("$config_directory/module.infos.cache");
6564 &get_all_module_infos();
6567 =head2 list_usermods
6569 Returns a list of additional module restrictions. For internal use in
6575 if (!$main::got_list_usermods_cache) {
6576 @main::list_usermods_cache = ( );
6578 open(USERMODS, "$config_directory/usermin.mods");
6580 if (/^([^:]+):(\+|-|):(.*)/) {
6581 push(@main::list_usermods_cache,
6582 [ $1, $2, [ split(/\s+/, $3) ] ]);
6586 $main::got_list_usermods_cache = 1;
6588 return @main::list_usermods_cache;
6591 =head2 available_usermods(&allmods, &usermods)
6593 Returns a list of modules that are available to the given user, based
6594 on usermod additional/subtractions. For internal use by Usermin only.
6597 sub available_usermods
6599 return @{$_[0]} if (!@{$_[1]});
6601 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6602 my @uinfo = @remote_user_info;
6603 @uinfo = getpwnam($remote_user) if (!@uinfo);
6604 foreach my $u (@{$_[1]}) {
6606 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6609 elsif ($u->[0] =~ /^\@(.*)$/) {
6610 # Check for group membership
6611 my @ginfo = getgrnam($1);
6612 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6613 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6615 elsif ($u->[0] =~ /^\//) {
6616 # Check users and groups in file
6618 open(USERFILE, $u->[0]);
6621 if ($_ eq $remote_user) {
6624 elsif (/^\@(.*)$/) {
6625 my @ginfo = getgrnam($1);
6627 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6628 &indexof($remote_user,
6629 split(/\s+/, $ginfo[3])) >= 0));
6636 if ($u->[1] eq "+") {
6637 map { $mods{$_}++ } @{$u->[2]};
6639 elsif ($u->[1] eq "-") {
6640 map { delete($mods{$_}) } @{$u->[2]};
6644 map { $mods{$_}++ } @{$u->[2]};
6648 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6651 =head2 get_available_module_infos(nocache)
6653 Returns a list of modules available to the current user, based on
6654 operating system support, access control and usermod restrictions. Useful
6655 in themes that need to display a list of modules the user can use.
6656 Each element of the returned array is a hash reference in the same format as
6657 returned by get_module_info.
6660 sub get_available_module_infos
6663 &read_acl(\%acl, \%uacl);
6664 my $risk = $gconfig{'risk_'.$base_remote_user};
6666 foreach my $minfo (&get_all_module_infos($_[0])) {
6667 next if (!&check_os_support($minfo));
6669 # Check module risk level
6670 next if ($risk ne 'high' && $minfo->{'risk'} &&
6671 $minfo->{'risk'} !~ /$risk/);
6675 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6676 !$acl{$base_remote_user,"*"});
6678 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6682 # Check usermod restrictions
6683 my @usermods = &list_usermods();
6684 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6685 &available_usermods(\@rv, \@usermods);
6687 # Check RBAC restrictions
6689 foreach my $m (@rv) {
6690 if (&supports_rbac($m->{'dir'}) &&
6691 &use_rbac_module_acl(undef, $m->{'dir'})) {
6692 local $rbacs = &get_rbac_module_acl($remote_user,
6700 # Module or system doesn't support RBAC
6701 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6707 if (defined(&theme_foreign_available)) {
6708 foreach my $m (@rbacrv) {
6709 if (&theme_foreign_available($m->{'dir'})) {
6718 # Check licence module vetos
6720 if ($main::licence_module) {
6721 foreach my $m (@themerv) {
6722 if (&foreign_call($main::licence_module,
6723 "check_module_licence", $m->{'dir'})) {
6735 =head2 get_visible_module_infos(nocache)
6737 Like get_available_module_infos, but excludes hidden modules from the list.
6738 Each element of the returned array is a hash reference in the same format as
6739 returned by get_module_info.
6742 sub get_visible_module_infos
6745 my $pn = &get_product_name();
6746 return grep { !$_->{'hidden'} &&
6747 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6750 =head2 get_visible_modules_categories(nocache)
6752 Returns a list of Webmin module categories, each of which is a hash ref
6753 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6754 of modules in the category, in the format returned by get_module_info.
6755 Un-used modules are automatically assigned to the 'unused' category, and
6756 those with no category are put into 'others'.
6759 sub get_visible_modules_categories
6762 my @mods = &get_visible_module_infos($nocache);
6764 if (&get_product_name() eq 'webmin') {
6765 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6766 @mods = grep { $_->{'installed'} ne '0' } @mods;
6768 my %cats = &list_categories(\@mods);
6770 foreach my $c (keys %cats) {
6771 my $cat = { 'code' => $c || 'other',
6772 'desc' => $cats{$c} };
6773 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6776 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6777 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6779 # Add un-installed modules in magic category
6780 my $cat = { 'code' => 'unused',
6781 'desc' => $text{'main_unused'},
6783 'modules' => \@unmods };
6789 =head2 is_under_directory(directory, file)
6791 Returns 1 if the given file is under the specified directory, 0 if not.
6792 Symlinks are taken into account in the file to find it's 'real' location.
6795 sub is_under_directory
6797 my ($dir, $file) = @_;
6798 return 1 if ($dir eq "/");
6799 return 0 if ($file =~ /\.\./);
6800 my $ld = &resolve_links($dir);
6802 return &is_under_directory($ld, $file);
6804 my $lp = &resolve_links($file);
6806 return &is_under_directory($dir, $lp);
6808 return 0 if (length($file) < length($dir));
6809 return 1 if ($dir eq $file);
6811 return substr($file, 0, length($dir)) eq $dir;
6814 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6816 Given an absolute URL, returns the host, port, page and ssl flag components.
6817 Relative URLs can also be parsed, if the base information is provided.
6822 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6824 my $ssl = $1 eq 'https';
6825 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6831 elsif ($_[0] =~ /^\/\S*$/) {
6832 # A relative to the server URL
6833 return ($_[1], $_[2], $_[0], $_[4]);
6836 # A relative to the directory URL
6838 $page =~ s/[^\/]+$//;
6839 return ($_[1], $_[2], $page.$_[0], $_[4]);
6843 =head2 check_clicks_function
6845 Returns HTML for a JavaScript function called check_clicks that returns
6846 true when first called, but false subsequently. Useful on onClick for
6847 critical buttons. Deprecated, as this method of preventing duplicate actions
6851 sub check_clicks_function
6856 function check_clicks(form)
6863 for(i=0; i<form.length; i++)
6864 form.elements[i].disabled = true;
6873 =head2 load_entities_map
6875 Returns a hash ref containing mappings between HTML entities (like ouml) and
6876 ascii values (like 246). Mainly for internal use.
6879 sub load_entities_map
6881 if (!defined(%entities_map_cache)) {
6883 open(EMAP, "$root_directory/entities_map.txt");
6885 if (/^(\d+)\s+(\S+)/) {
6886 $entities_map_cache{$2} = $1;
6891 return \%entities_map_cache;
6894 =head2 entities_to_ascii(string)
6896 Given a string containing HTML entities like ö and 7, replace them
6897 with their ASCII equivalents.
6900 sub entities_to_ascii
6903 my $emap = &load_entities_map();
6904 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6905 $str =~ s/&#(\d+);/chr($1)/ge;
6909 =head2 get_product_name
6911 Returns either 'webmin' or 'usermin', depending on which program the current
6912 module is in. Useful for modules that can be installed into either.
6915 sub get_product_name
6917 return $gconfig{'product'} if (defined($gconfig{'product'}));
6918 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6923 Returns the character set for the current language, such as iso-8859-1.
6928 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6929 $current_lang_info->{'charset'} ?
6930 $current_lang_info->{'charset'} : $default_charset;
6934 =head2 get_display_hostname
6936 Returns the system's hostname for UI display purposes. This may be different
6937 from the actual hostname if you administrator has configured it so in the
6938 Webmin Configuration module.
6941 sub get_display_hostname
6943 if ($gconfig{'hostnamemode'} == 0) {
6944 return &get_system_hostname();
6946 elsif ($gconfig{'hostnamemode'} == 3) {
6947 return $gconfig{'hostnamedisplay'};
6950 my $h = $ENV{'HTTP_HOST'};
6952 if ($gconfig{'hostnamemode'} == 2) {
6953 $h =~ s/^(www|ftp|mail)\.//i;
6959 =head2 save_module_config([&config], [modulename])
6961 Saves the configuration for some module. The config parameter is an optional
6962 hash reference of names and values to save, which defaults to the global
6963 %config hash. The modulename parameter is the module to update the config
6964 file, which defaults to the current module.
6967 sub save_module_config
6969 my $c = $_[0] || { &get_module_variable('%config') };
6970 my $m = defined($_[1]) ? $_[1] : &get_module_name();
6971 &write_file("$config_directory/$m/config", $c);
6974 =head2 save_user_module_config([&config], [modulename])
6976 Saves the user's Usermin preferences for some module. The config parameter is
6977 an optional hash reference of names and values to save, which defaults to the
6978 global %userconfig hash. The modulename parameter is the module to update the
6979 config file, which defaults to the current module.
6982 sub save_user_module_config
6984 my $c = $_[0] || { &get_module_variable('%userconfig') };
6985 my $m = $_[1] || &get_module_name();
6986 my $ucd = $user_config_directory;
6988 my @uinfo = @remote_user_info ? @remote_user_info
6989 : getpwnam($remote_user);
6990 return if (!@uinfo || !$uinfo[7]);
6991 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
6993 &write_file("$ucd/$m/config", $c);
6996 =head2 nice_size(bytes, [min])
6998 Converts a number of bytes into a number followed by a suffix like GB, MB
6999 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7000 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7005 my ($units, $uname);
7006 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7007 $units = 1024*1024*1024*1024;
7010 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7011 $units = 1024*1024*1024;
7014 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7018 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7026 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7028 return $sz." ".$uname;
7031 =head2 get_perl_path
7033 Returns the path to Perl currently in use, such as /usr/bin/perl.
7038 if (open(PERL, "$config_directory/perl-path")) {
7044 return $^X if (-x $^X);
7045 return &has_command("perl");
7048 =head2 get_goto_module([&mods])
7050 Returns the details of a module that the current user should be re-directed
7051 to after logging in, or undef if none. Useful for themes.
7056 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7057 if ($gconfig{'gotomodule'}) {
7058 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7059 return $goto if ($goto);
7061 if (@mods == 1 && $gconfig{'gotoone'}) {
7067 =head2 select_all_link(field, form, [text])
7069 Returns HTML for a 'Select all' link that uses Javascript to select
7070 multiple checkboxes with the same name. The parameters are :
7072 =item field - Name of the checkbox inputs.
7074 =item form - Index of the form on the page.
7076 =item text - Message for the link, defaulting to 'Select all'.
7081 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7082 my ($field, $form, $text) = @_;
7084 $text ||= $text{'ui_selall'};
7085 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7088 =head2 select_invert_link(field, form, text)
7090 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7091 selection on multiple checkboxes with the same name. The parameters are :
7093 =item field - Name of the checkbox inputs.
7095 =item form - Index of the form on the page.
7097 =item text - Message for the link, defaulting to 'Invert selection'.
7100 sub select_invert_link
7102 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7103 my ($field, $form, $text) = @_;
7105 $text ||= $text{'ui_selinv'};
7106 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7109 =head2 select_rows_link(field, form, text, &rows)
7111 Returns HTML for a link that uses Javascript to select rows with particular
7112 values for their checkboxes. The parameters are :
7114 =item field - Name of the checkbox inputs.
7116 =item form - Index of the form on the page.
7118 =item text - Message for the link, de
7120 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7123 sub select_rows_link
7125 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7126 my ($field, $form, $text, $rows) = @_;
7128 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7129 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7130 $js .= "return false;";
7131 return "<a href='#' onClick='$js'>$text</a>";
7134 =head2 check_pid_file(file)
7136 Given a pid file, returns the PID it contains if the process is running.
7141 open(PIDFILE, $_[0]) || return undef;
7142 my $pid = <PIDFILE>;
7144 $pid =~ /^\s*(\d+)/ || return undef;
7145 kill(0, $1) || return undef;
7151 Return the local os-specific library name to this module. For internal use only.
7156 my $mn = &get_module_name();
7157 my $md = &module_root_directory($mn);
7158 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7159 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7161 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7162 return "$mn-$gconfig{'os_type'}-lib.pl";
7164 elsif (-r "$md/$mn-generic-lib.pl") {
7165 return "$mn-generic-lib.pl";
7172 =head2 module_root_directory(module)
7174 Given a module name, returns its root directory. On a typical Webmin install,
7175 all modules are under the same directory - but it is theoretically possible to
7179 sub module_root_directory
7181 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7182 if (@root_directories > 1) {
7183 foreach my $r (@root_directories) {
7189 return "$root_directories[0]/$d";
7192 =head2 list_mime_types
7194 Returns a list of all known MIME types and their extensions, as a list of hash
7195 references with keys :
7197 =item type - The MIME type, like text/plain.
7199 =item exts - A list of extensions, like .doc and .avi.
7201 =item desc - A human-readable description for the MIME type.
7206 if (!@list_mime_types_cache) {
7208 open(MIME, "$root_directory/mime.types");
7212 if (s/#\s*(.*)$//g) {
7215 my ($type, @exts) = split(/\s+/);
7217 push(@list_mime_types_cache, { 'type' => $type,
7224 return @list_mime_types_cache;
7227 =head2 guess_mime_type(filename, [default])
7229 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7230 The optional default parameter sets a default type of use if none is found,
7231 which defaults to application/octet-stream.
7236 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7238 foreach my $t (&list_mime_types()) {
7239 foreach my $e (@{$t->{'exts'}}) {
7240 return $t->{'type'} if (lc($e) eq lc($ext));
7244 return @_ > 1 ? $_[1] : "application/octet-stream";
7247 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7249 Opens a file handle for writing to a temporary file, which will only be
7250 renamed over the real file when the handle is closed. This allows critical
7251 files like /etc/shadow to be updated safely, even if writing fails part way
7252 through due to lack of disk space. The parameters are :
7254 =item handle - File handle to open, as you would use in Perl's open function.
7256 =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.
7258 =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 $! with the error code.
7260 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7262 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7268 # Just getting a temp file
7269 if (!defined($main::open_tempfiles{$_[0]})) {
7270 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7271 my $dir = $1 || "/";
7272 my $tmp = "$dir/$2.webmintmp.$$";
7273 $main::open_tempfiles{$_[0]} = $tmp;
7274 push(@main::temporary_files, $tmp);
7276 return $main::open_tempfiles{$_[0]};
7280 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7281 $fh = &callers_package($fh);
7283 my %gaccess = &get_module_acl(undef, "");
7284 my $db = $gconfig{'debug_what_write'};
7285 if ($file =~ /\r|\n|\0/) {
7286 if ($noerror) { return 0; }
7287 else { &error("Filename contains invalid characters"); }
7289 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7290 # Read-only mode .. veto all writes
7291 print STDERR "vetoing write to $file\n";
7292 return open($fh, ">$null_file");
7294 elsif ($file =~ /^(>|>>|)nul$/i) {
7295 # Write to Windows null device
7296 &webmin_debug_log($1 eq ">" ? "WRITE" :
7297 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7299 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7300 # Writes to /dev/null or TTYs don't need to be handled
7301 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7302 return open($fh, $file);
7304 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7305 &webmin_debug_log("WRITE", $1) if ($db);
7306 # Over-writing a file, via a temp file
7308 $file = &translate_filename($file);
7310 # Open the link target instead
7311 $file = &resolve_links($file);
7314 # Cannot open a directory!
7315 if ($noerror) { return 0; }
7316 else { &error("Cannot write to directory $file"); }
7318 my $tmp = &open_tempfile($file);
7319 my $ex = open($fh, ">$tmp");
7320 if (!$ex && $! =~ /permission/i) {
7321 # Could not open temp file .. try opening actual file
7323 $ex = open($fh, ">$file");
7324 delete($main::open_tempfiles{$file});
7327 $main::open_temphandles{$fh} = $file;
7330 if (!$ex && !$noerror) {
7331 &error(&text("efileopen", $file, $!));
7335 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7336 # Just writing direct to a file
7337 &webmin_debug_log("WRITE", $1) if ($db);
7339 $file = &translate_filename($file);
7340 my @old_attributes = &get_clear_file_attributes($file);
7341 my $ex = open($fh, ">$file");
7342 &reset_file_attributes($file, \@old_attributes);
7343 $main::open_temphandles{$fh} = $file;
7344 if (!$ex && !$noerror) {
7345 &error(&text("efileopen", $file, $!));
7350 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7351 # Appending to a file .. nothing special to do
7352 &webmin_debug_log("APPEND", $1) if ($db);
7354 $file = &translate_filename($file);
7355 my @old_attributes = &get_clear_file_attributes($file);
7356 my $ex = open($fh, ">>$file");
7357 &reset_file_attributes($file, \@old_attributes);
7358 $main::open_temphandles{$fh} = $file;
7359 if (!$ex && !$noerror) {
7360 &error(&text("efileopen", $file, $!));
7365 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7366 # Read mode .. nothing to do here
7367 &webmin_debug_log("READ", $file) if ($db);
7368 $file = &translate_filename($file);
7369 return open($fh, $file);
7371 elsif ($file eq ">" || $file eq ">>") {
7372 my ($package, $filename, $line) = caller;
7373 if ($noerror) { return 0; }
7374 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7377 my ($package, $filename, $line) = caller;
7378 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7383 =head2 close_tempfile(file|handle)
7385 Copies a temp file to the actual file, assuming that all writes were
7386 successful. The handle must have been one passed to open_tempfile.
7392 my $fh = &callers_package($_[0]);
7394 if (defined($file = $main::open_temphandles{$fh})) {
7396 close($fh) || &error(&text("efileclose", $file, $!));
7397 delete($main::open_temphandles{$fh});
7398 return &close_tempfile($file);
7400 elsif (defined($main::open_tempfiles{$_[0]})) {
7402 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7403 my @st = stat($_[0]);
7404 if (&is_selinux_enabled() && &has_command("chcon")) {
7405 # Set original security context
7406 system("chcon --reference=".quotemeta($_[0]).
7407 " ".quotemeta($main::open_tempfiles{$_[0]}).
7408 " >/dev/null 2>&1");
7410 my @old_attributes = &get_clear_file_attributes($_[0]);
7411 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7413 # Set original permissions and ownership
7414 chmod($st[2], $_[0]);
7415 chown($st[4], $st[5], $_[0]);
7417 &reset_file_attributes($_[0], \@old_attributes);
7418 delete($main::open_tempfiles{$_[0]});
7419 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7420 if ($main::open_templocks{$_[0]}) {
7421 &unlock_file($_[0]);
7422 delete($main::open_templocks{$_[0]});
7427 # Must be closing a handle not associated with a file
7433 =head2 print_tempfile(handle, text, ...)
7435 Like the normal print function, but calls &error on failure. Useful when
7436 combined with open_tempfile, to ensure that a criticial file is never
7437 only partially written.
7442 my ($fh, @args) = @_;
7443 $fh = &callers_package($fh);
7444 (print $fh @args) || &error(&text("efilewrite",
7445 $main::open_temphandles{$fh} || $fh, $!));
7448 =head2 is_selinux_enabled
7450 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7453 sub is_selinux_enabled
7455 if (!defined($main::selinux_enabled_cache)) {
7457 if ($gconfig{'os_type'} !~ /-linux$/) {
7458 # Not on linux, so no way
7459 $main::selinux_enabled_cache = 0;
7461 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7462 # Use global config file
7463 $main::selinux_enabled_cache =
7464 $seconfig{'SELINUX'} eq 'disabled' ||
7465 !$seconfig{'SELINUX'} ? 0 : 1;
7468 # Use selinuxenabled command
7469 #$selinux_enabled_cache =
7470 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7471 $main::selinux_enabled_cache = 0;
7474 return $main::selinux_enabled_cache;
7477 =head2 get_clear_file_attributes(file)
7479 Finds file attributes that may prevent writing, clears them and returns them
7480 as a list. May call error. Mainly for internal use by open_tempfile and
7484 sub get_clear_file_attributes
7488 if ($gconfig{'chattr'}) {
7489 # Get original immutable bit
7490 my $out = &backquote_command(
7491 "lsattr ".quotemeta($file)." 2>/dev/null");
7493 $out =~ s/\s\S+\n//;
7494 @old_attributes = grep { $_ ne '-' } split(//, $out);
7496 if (&indexof("i", @old_attributes) >= 0) {
7497 my $err = &backquote_logged(
7498 "chattr -i ".quotemeta($file)." 2>&1");
7500 &error("Failed to remove immutable bit on ".
7505 return @old_attributes;
7508 =head2 reset_file_attributes(file, &attributes)
7510 Put back cleared attributes on some file. May call error. Mainly for internal
7511 use by close_tempfile.
7514 sub reset_file_attributes
7516 my ($file, $old_attributes) = @_;
7517 if (&indexof("i", @$old_attributes) >= 0) {
7518 my $err = &backquote_logged(
7519 "chattr +i ".quotemeta($file)." 2>&1");
7521 &error("Failed to restore immutable bit on ".
7527 =head2 cleanup_tempnames
7529 Remove all temporary files generated using transname. Typically only called
7530 internally when a Webmin script exits.
7533 sub cleanup_tempnames
7535 foreach my $t (@main::temporary_files) {
7538 @main::temporary_files = ( );
7541 =head2 open_lock_tempfile([handle], file, [no-error])
7543 Returns a temporary file for writing to some actual file, and also locks it.
7544 Effectively the same as calling lock_file and open_tempfile on the same file,
7545 but calls the unlock for you automatically when it is closed.
7548 sub open_lock_tempfile
7550 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7551 $fh = &callers_package($fh);
7552 my $lockfile = $file;
7553 $lockfile =~ s/^[^\/]*//;
7554 if ($lockfile =~ /^\//) {
7555 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7557 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7562 $main::end_exit_status ||= $?;
7563 if ($$ == $main::initial_process_id) {
7564 # Exiting from initial process
7565 &cleanup_tempnames();
7566 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7567 $main::debug_log_start_module eq &get_module_name()) {
7568 my $len = time() - $main::debug_log_start_time;
7569 &webmin_debug_log("STOP", "runtime=$len");
7570 $main::debug_log_start_time = 0;
7572 if (!$ENV{'SCRIPT_NAME'} &&
7573 $main::initial_module_name eq &get_module_name()) {
7574 # In a command-line script - call the real exit, so that the
7575 # exit status gets properly propogated. In some cases this
7576 # was not happening.
7577 exit($main::end_exit_status);
7582 =head2 month_to_number(month)
7584 Converts a month name like feb to a number like 1.
7589 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7592 =head2 number_to_month(number)
7594 Converts a number like 1 to a month name like Feb.
7599 return ucfirst($number_to_month_map{$_[0]});
7602 =head2 get_rbac_module_acl(user, module)
7604 Returns a hash reference of RBAC overrides ACLs for some user and module.
7605 May return undef if none exist (indicating access denied), or the string *
7606 if full access is granted.
7609 sub get_rbac_module_acl
7611 my ($user, $mod) = @_;
7612 eval "use Authen::SolarisRBAC";
7613 return undef if ($@);
7616 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7617 # Automagic webmin.modulename.admin authorization exists .. allow access
7619 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7620 %rv = ( 'noconfig' => 1 );
7627 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7631 my ($auths, $acls) = split(/\s+/, $_);
7632 my @auths = split(/,/, $auths);
7634 my ($merge) = ($acls =~ s/^\+//);
7636 if ($auths eq "*") {
7637 # These ACLs apply to all RBAC users.
7638 # Only if there is some that match a specific authorization
7639 # later will they be used though.
7642 # Check each of the RBAC authorizations
7643 foreach my $a (@auths) {
7644 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7649 $foundany++ if ($gotall);
7652 # Found an RBAC authorization - return the ACLs
7653 return "*" if ($acls eq "*");
7654 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7656 # Just add to current set
7657 foreach my $a (keys %acl) {
7668 return !$foundany ? undef : defined(%rv) ? \%rv : undef;
7671 =head2 supports_rbac([module])
7673 Returns 1 if RBAC client support is available, such as on Solaris.
7678 return 0 if ($gconfig{'os_type'} ne 'solaris');
7679 eval "use Authen::SolarisRBAC";
7682 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7687 =head2 use_rbac_module_acl(user, module)
7689 Returns 1 if some user should use RBAC to get permissions for a module
7692 sub use_rbac_module_acl
7694 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7695 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7696 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7697 my %access = &get_module_acl($u, $m, 1);
7698 return $access{'rbac'} ? 1 : 0;
7701 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7703 Runs some command, possibly feeding it input and capturing output to the
7704 give files or scalar references. The parameters are :
7706 =item command - Full command to run, possibly including shell meta-characters.
7708 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7710 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7712 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7714 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7716 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7721 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7722 if (&is_readonly_mode() && !$safe) {
7723 print STDERR "Vetoing command $_[0]\n";
7727 my $cmd = &translate_command($cmd);
7729 # Use ` operator where possible
7730 if (!$stdin && ref($stdout) && !$stderr) {
7731 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7732 $$stdout = `$cmd 2>$null_file`;
7735 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7736 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7737 $$stdout = `$cmd 2>&1`;
7740 elsif (!$stdin && !$stdout && !$stderr) {
7741 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7742 return system("$cmd >$null_file 2>$null_file <$null_file");
7744 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7747 $| = 1; # needed on some systems to flush before forking
7748 pipe(EXECSTDINr, EXECSTDINw);
7749 pipe(EXECSTDOUTr, EXECSTDOUTw);
7750 pipe(EXECSTDERRr, EXECSTDERRw);
7752 if (!($pid = fork())) {
7756 open(STDIN, "<&EXECSTDINr");
7757 open(STDOUT, ">&EXECSTDOUTw");
7758 if (ref($stderr) && $stderr eq $stdout) {
7759 open(STDERR, ">&EXECSTDOUTw");
7762 open(STDERR, ">&EXECSTDERRw");
7769 my $fullcmd = "($cmd)";
7770 if ($stdin && !ref($stdin)) {
7771 $fullcmd .= " <$stdin";
7773 if ($stdout && !ref($stdout)) {
7774 $fullcmd .= " >$stdout";
7776 if ($stderr && !ref($stderr)) {
7777 if ($stderr eq $stdout) {
7778 $fullcmd .= " 2>&1";
7781 $fullcmd .= " 2>$stderr";
7784 if ($gconfig{'os_type'} eq 'windows') {
7788 exec("/bin/sh", "-c", $fullcmd);
7790 print "Exec failed : $!\n";
7797 # Feed input and capture output
7799 if ($stdin && ref($stdin)) {
7800 print EXECSTDINw $$stdin;
7803 if ($stdout && ref($stdout)) {
7805 while(<EXECSTDOUTr>) {
7810 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7812 while(<EXECSTDERRr>) {
7823 =head2 open_readfile(handle, file)
7825 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7826 exactly the same as Perl's open function.
7831 my ($fh, $file) = @_;
7832 $fh = &callers_package($fh);
7833 my $realfile = &translate_filename($file);
7834 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7835 return open($fh, "<".$realfile);
7838 =head2 open_execute_command(handle, command, output?, safe?)
7840 Runs some command, with the specified file handle set to either write to it if
7841 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7842 indicates if the command modifies the state of the system or not.
7845 sub open_execute_command
7847 my ($fh, $cmd, $mode, $safe) = @_;
7848 $fh = &callers_package($fh);
7849 my $realcmd = &translate_command($cmd);
7850 if (&is_readonly_mode() && !$safe) {
7851 # Don't actually run it
7852 print STDERR "vetoing command $cmd\n";
7855 return open($fh, ">$null_file");
7858 return open($fh, $null_file);
7862 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7863 if ($gconfig{'debug_what_cmd'});
7865 return open($fh, "| $cmd");
7867 elsif ($mode == 1) {
7868 return open($fh, "$cmd 2>$null_file |");
7870 elsif ($mode == 2) {
7871 return open($fh, "$cmd 2>&1 |");
7875 =head2 translate_filename(filename)
7877 Applies all relevant registered translation functions to a filename. Mostly
7878 for internal use, and typically does nothing.
7881 sub translate_filename
7883 my ($realfile) = @_;
7884 my @funcs = grep { $_->[0] eq &get_module_name() ||
7885 !defined($_->[0]) } @main::filename_callbacks;
7886 foreach my $f (@funcs) {
7888 $realfile = &$func($realfile, @{$f->[2]});
7893 =head2 translate_command(filename)
7895 Applies all relevant registered translation functions to a command. Mostly
7896 for internal use, and typically does nothing.
7899 sub translate_command
7902 my @funcs = grep { $_->[0] eq &get_module_name() ||
7903 !defined($_->[0]) } @main::command_callbacks;
7904 foreach my $f (@funcs) {
7906 $realcmd = &$func($realcmd, @{$f->[2]});
7911 =head2 register_filename_callback(module|undef, &function, &args)
7913 Registers some function to be called when the specified module (or all
7914 modules) tries to open a file for reading and writing. The function must
7915 return the actual file to open. This allows you to override which files
7916 other code actually operates on, via the translate_filename function.
7919 sub register_filename_callback
7921 my ($mod, $func, $args) = @_;
7922 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7925 =head2 register_command_callback(module|undef, &function, &args)
7927 Registers some function to be called when the specified module (or all
7928 modules) tries to execute a command. The function must return the actual
7929 command to run. This allows you to override which commands other other code
7930 actually runs, via the translate_command function.
7933 sub register_command_callback
7935 my ($mod, $func, $args) = @_;
7936 push(@main::command_callbacks, [ $mod, $func, $args ]);
7939 =head2 capture_function_output(&function, arg, ...)
7941 Captures output that some function prints to STDOUT, and returns it. Useful
7942 for functions outside your control that print data when you really want to
7943 manipulate it before output.
7946 sub capture_function_output
7948 my ($func, @args) = @_;
7949 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
7950 my $old = select(SOCKET1);
7951 my @rv = &$func(@args);
7960 return wantarray ? ($out, \@rv) : $out;
7963 =head2 capture_function_output_tempfile(&function, arg, ...)
7965 Behaves the same as capture_function_output, but uses a temporary file
7966 to avoid buffer full problems.
7969 sub capture_function_output_tempfile
7971 my ($func, @args) = @_;
7972 my $temp = &transname();
7973 open(BUFFER, ">$temp");
7974 my $old = select(BUFFER);
7975 my @rv = &$func(@args);
7978 my $out = &read_file_contents($temp);
7979 &unlink_file($temp);
7980 return wantarray ? ($out, \@rv) : $out;
7983 =head2 modules_chooser_button(field, multiple, [form])
7985 Returns HTML for a button for selecting one or many Webmin modules.
7986 field - Name of the HTML field to place the module names into.
7987 multiple - Set to 1 if multiple modules can be selected.
7988 form - Index of the form on the page.
7991 sub modules_chooser_button
7993 return &theme_modules_chooser_button(@_)
7994 if (defined(&theme_modules_chooser_button));
7995 my $form = defined($_[2]) ? $_[2] : 0;
7996 my $w = $_[1] ? 700 : 500;
7998 if ($_[1] && $gconfig{'db_sizemodules'}) {
7999 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8001 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8002 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8004 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";
8007 =head2 substitute_template(text, &hash)
8009 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8010 the text replaces it with the value of the hash key foo. Also supports blocks
8011 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8012 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8015 sub substitute_template
8017 # Add some extra fixed parameters to the hash
8018 my %hash = %{$_[1]};
8019 $hash{'hostname'} = &get_system_hostname();
8020 $hash{'webmin_config'} = $config_directory;
8021 $hash{'webmin_etc'} = $config_directory;
8022 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8023 $hash{'webmin_var'} = $var_directory;
8025 # Add time-based parameters, for use in DNS
8026 $hash{'current_time'} = time();
8027 my @tm = localtime($hash{'current_time'});
8028 $hash{'current_year'} = $tm[5]+1900;
8029 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8030 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8031 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8032 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8033 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8035 # Actually do the substition
8037 foreach my $s (keys %hash) {
8038 next if ($s eq ''); # Prevent just $ from being subbed
8041 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8042 $rv =~ s/\$\Q$us\E/$sv/g;
8044 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8045 # and ${IF}..${ENDIF} with value
8046 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/\2/g;
8047 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/\2/g;
8049 # Replace $IF..$ELSE..$ENDIF block with first value,
8050 # and $IF..$ENDIF with value
8051 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/\2/g;
8052 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/\2/g;
8054 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8055 # matching, nothing if not
8056 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/\2/g;
8057 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8059 # Replace $IFEQ..$ENDIFEQ block with first value if
8060 # matching, nothing if not
8061 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/\2/g;
8062 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8065 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8066 # and ${IF}..${ENDIF} with nothing
8067 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/\4/g;
8068 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8070 # Replace $IF..$ELSE..$ENDIF block with second value,
8071 # and $IF..$ENDIF with nothing
8072 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/\4/g;
8073 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8075 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8076 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8077 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8081 # Now assume any $IF blocks whose variables are not present in the hash
8082 # evaluate to false.
8083 # $IF...$ELSE x $ENDIF => x
8084 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8085 # $IF...x...$ENDIF => (nothing)
8086 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8087 # ${var} => (nothing)
8088 $rv =~ s/\$\{[A-Z]+\}//g;
8093 =head2 running_in_zone
8095 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8096 disable module and features that are not appropriate, like those that modify
8097 mounted filesystems.
8102 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8103 $gconfig{'os_version'} < 10);
8104 my $zn = `zonename 2>$null_file`;
8106 return $zn && $zn ne "global";
8109 =head2 running_in_vserver
8111 Returns 1 if the current Webmin instance is running in a Linux VServer.
8112 Used to disable modules and features that are not appropriate.
8115 sub running_in_vserver
8117 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8120 open(MTAB, "/etc/mtab");
8122 my ($dev, $mp) = split(/\s+/, $_);
8123 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8132 =head2 running_in_xen
8134 Returns 1 if Webmin is running inside a Xen instance, by looking
8135 at /proc/xen/capabilities.
8140 return 0 if (!-r "/proc/xen/capabilities");
8141 my $cap = &read_file_contents("/proc/xen/capabilities");
8142 return $cap =~ /control_d/ ? 0 : 1;
8145 =head2 list_categories(&modules, [include-empty])
8147 Returns a hash mapping category codes to names, including any custom-defined
8148 categories. The modules parameter must be an array ref of module hash objects,
8149 as returned by get_all_module_infos.
8154 my ($mods, $empty) = @_;
8155 my (%cats, %catnames);
8156 &read_file("$config_directory/webmin.catnames", \%catnames);
8157 foreach my $o (@lang_order_list) {
8158 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8163 foreach my $m (@$mods) {
8164 my $c = $m->{'category'};
8165 next if ($cats{$c});
8166 if (defined($catnames{$c})) {
8167 $cats{$c} = $catnames{$c};
8169 elsif ($text{"category_$c"}) {
8170 $cats{$c} = $text{"category_$c"};
8173 # try to get category name from module ..
8174 my %mtext = &load_language($m->{'dir'});
8175 if ($mtext{"category_$c"}) {
8176 $cats{$c} = $mtext{"category_$c"};
8179 $c = $m->{'category'} = "";
8180 $cats{$c} = $text{"category_$c"};
8187 =head2 is_readonly_mode
8189 Returns 1 if the current user is in read-only mode, and thus all writes
8190 to files and command execution should fail.
8193 sub is_readonly_mode
8195 if (!defined($main::readonly_mode_cache)) {
8196 my %gaccess = &get_module_acl(undef, "");
8197 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8199 return $main::readonly_mode_cache;
8202 =head2 command_as_user(user, with-env?, command, ...)
8204 Returns a command to execute some command as the given user, using the
8205 su statement. If on Linux, the /bin/sh shell is forced in case the user
8206 does not have a valid shell. If with-env is set to 1, the -s flag is added
8207 to the su command to read the user's .profile or .bashrc file.
8212 my ($user, $env, @args) = @_;
8213 my @uinfo = getpwnam($user);
8214 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8215 # User shell doesn't appear to be valid
8216 if ($gconfig{'os_type'} =~ /-linux$/) {
8217 # Use -s /bin/sh to force it
8218 $shellarg = " -s /bin/sh";
8220 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8221 $gconfig{'os_type'} eq 'solaris' &&
8222 $gconfig{'os_version'} >= 11 ||
8223 $gconfig{'os_type'} eq 'macos') {
8224 # Use -m and force /bin/sh
8225 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8229 my $rv = "su".($env ? " -" : "").$shellarg.
8230 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8234 =head2 list_osdn_mirrors(project, file)
8236 This function is now deprecated in favor of letting sourceforge just
8237 redirect to the best mirror, and now just returns their primary download URL.
8240 sub list_osdn_mirrors
8242 my ($project, $file) = @_;
8243 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8245 'mirror' => 'downloads' } );
8248 =head2 convert_osdn_url(url)
8250 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8251 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8252 to a real URL on the sourceforge download redirector.
8255 sub convert_osdn_url
8258 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8259 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8260 # Always use the Sourceforge mail download URL, which does
8261 # a location-based redirect for us
8262 my ($project, $file) = ($1, $2);
8263 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8265 return wantarray ? ( $url, 0 ) : $url;
8268 # Some other source .. don't change
8269 return wantarray ? ( $url, 2 ) : $url;
8273 =head2 get_current_dir
8275 Returns the directory the current process is running in.
8281 if ($gconfig{'os_type'} eq 'windows') {
8294 =head2 supports_users
8296 Returns 1 if the current OS supports Unix user concepts and functions like
8297 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8303 return $gconfig{'os_type'} ne 'windows';
8306 =head2 supports_symlinks
8308 Returns 1 if the current OS supports symbolic and hard links. This will not
8309 be the case on Windows.
8312 sub supports_symlinks
8314 return $gconfig{'os_type'} ne 'windows';
8317 =head2 quote_path(path)
8319 Returns a path with safe quoting for the current operating system.
8325 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8326 # Windows only supports "" style quoting
8330 return quotemeta($path);
8334 =head2 get_windows_root
8336 Returns the base windows system directory, like c:/windows.
8339 sub get_windows_root
8341 if ($ENV{'SystemRoot'}) {
8342 my $rv = $ENV{'SystemRoot'};
8347 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8351 =head2 read_file_contents(file)
8353 Given a filename, returns its complete contents as a string. Effectively
8354 the same as the Perl construct `cat file`.
8357 sub read_file_contents
8359 &open_readfile(FILE, $_[0]) || return undef;
8366 =head2 unix_crypt(password, salt)
8368 Performs Unix encryption on a password, using the built-in crypt function or
8369 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8370 must be either an already-hashed password, or a two-character alpha-numeric
8376 my ($pass, $salt) = @_;
8377 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8378 my $rv = eval "crypt(\$pass, \$salt)";
8380 return $rv if ($rv && !$@);
8381 eval "use Crypt::UnixCrypt";
8383 return Crypt::UnixCrypt::crypt($pass, $salt);
8386 &error("Failed to encrypt password : $err");
8390 =head2 split_quoted_string(string)
8392 Given a string like I<foo "bar baz" quux>, returns the array :
8396 sub split_quoted_string
8400 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8401 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8402 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8409 =head2 write_to_http_cache(url, file|&data)
8411 Updates the Webmin cache with the contents of the given file, possibly also
8412 clearing out old data. Mainly for internal use by http_download.
8415 sub write_to_http_cache
8417 my ($url, $file) = @_;
8418 return 0 if (!$gconfig{'cache_size'});
8420 # Don't cache downloads that look dynamic
8421 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8425 # Check if the current module should do caching
8426 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8427 # Caching all except some modules
8428 my @mods = split(/\s+/, $1);
8429 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8431 elsif ($gconfig{'cache_mods'}) {
8432 # Only caching some modules
8433 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8434 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8440 $size = length($$file);
8443 my @st = stat($file);
8447 if ($size > $gconfig{'cache_size'}) {
8448 # Bigger than the whole cache - so don't save it
8453 $cfile = "$main::http_cache_directory/$cfile";
8455 # See how much we have cached currently, clearing old files
8457 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8458 opendir(CACHEDIR, $main::http_cache_directory);
8459 foreach my $f (readdir(CACHEDIR)) {
8460 next if ($f eq "." || $f eq "..");
8461 my $path = "$main::http_cache_directory/$f";
8462 my @st = stat($path);
8463 if ($gconfig{'cache_days'} &&
8464 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8465 # This file is too old .. trash it
8470 push(@cached, [ $path, $st[7], $st[9] ]);
8474 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8475 while($total+$size > $gconfig{'cache_size'} && @cached) {
8476 # Cache is too big .. delete some files until the new one will fit
8477 unlink($cached[0]->[0]);
8478 $total -= $cached[0]->[1];
8482 # Finally, write out the new file
8484 &open_tempfile(CACHEFILE, ">$cfile");
8485 &print_tempfile(CACHEFILE, $$file);
8486 &close_tempfile(CACHEFILE);
8489 my ($ok, $err) = ©_source_dest($file, $cfile);
8495 =head2 check_in_http_cache(url)
8497 If some URL is in the cache and valid, return the filename for it. Mainly
8498 for internal use by http_download.
8501 sub check_in_http_cache
8504 return undef if (!$gconfig{'cache_size'});
8506 # Check if the current module should do caching
8507 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8508 # Caching all except some modules
8509 my @mods = split(/\s+/, $1);
8510 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8512 elsif ($gconfig{'cache_mods'}) {
8513 # Only caching some modules
8514 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8515 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8520 $cfile = "$main::http_cache_directory/$cfile";
8521 my @st = stat($cfile);
8522 return undef if (!@st || !$st[7]);
8523 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8528 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8533 =head2 supports_javascript
8535 Returns 1 if the current browser is assumed to support javascript.
8538 sub supports_javascript
8540 if (defined(&theme_supports_javascript)) {
8541 return &theme_supports_javascript();
8543 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8546 =head2 get_module_name
8548 Returns the name of the Webmin module that called this function. For internal
8549 use only by other API functions.
8554 return &get_module_variable('$module_name');
8557 =head2 get_module_variable(name, [ref])
8559 Returns the value of some variable which is set in the caller's context, if
8560 using the new WebminCore package. For internal use only.
8563 sub get_module_variable
8565 my ($v, $wantref) = @_;
8566 my $slash = $wantref ? "\\" : "";
8567 my $thispkg = &web_libs_package();
8568 if ($thispkg eq 'WebminCore') {
8569 my ($vt, $vn) = split('', $v, 2);
8571 for(my $i=0; ($callpkg) = caller($i); $i++) {
8572 last if ($callpkg ne $thispkg);
8574 return eval "${slash}${vt}${callpkg}::${vn}";
8576 return eval "${slash}${v}";
8579 =head2 clear_time_locale()
8581 Temporarily force the locale to C, until reset_time_locale is called. This is
8582 useful if your code is going to call C<strftime> from the POSIX package, and
8583 you want to ensure that the output is in a consistent format.
8586 sub clear_time_locale
8588 if ($main::clear_time_locale_count == 0) {
8591 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8592 POSIX::setlocale(POSIX::LC_TIME, "C");
8595 $main::clear_time_locale_count++;
8598 =head2 reset_time_locale()
8600 Revert the locale to whatever it was before clear_time_locale was called
8603 sub reset_time_locale
8605 if ($main::clear_time_locale_count == 1) {
8607 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8608 $main::clear_time_locale_old = undef;
8611 $main::clear_time_locale_count--;
8614 =head2 callers_package(filehandle)
8616 Convert a non-module filehandle like FOO to one qualified with the
8617 caller's caller's package, like fsdump::FOO. For internal use only.
8623 my $callpkg = (caller(1))[0];
8624 my $thispkg = &web_libs_package();
8625 if (!ref($fh) && $fh !~ /::/ &&
8626 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8627 $fh = $callpkg."::".$fh;
8632 =head2 web_libs_package()
8634 Returns the package this code is in. We can't always trust __PACKAGE__. For
8638 sub web_libs_package
8640 if ($called_from_webmin_core) {
8641 return "WebminCore";
8646 $done_web_lib_funcs = 1;