1 =head1 web-lib-funcs.pl
3 Common functions for Webmin CGI scripts. This file gets in-directly included
4 by all scripts that use web-lib.pl.
9 ui_print_header(undef, 'My Module', '');
10 print 'This is Webmin version ',get_webmin_version(),'<p>\n';
19 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
20 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
21 %done_foreign_require $webmin_feedback_address
22 $user_skill_level $pragma_no_cache $foreign_args);
24 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
26 Fill the given hash reference with name=value pairs from a file. The required
29 =item file - The file to head, which must be text with each line like name=value
31 =item hash - The hash reference to add values read from the file to.
33 =item order - If given, an array reference to add names to in the order they were read
35 =item lowercase - If set to 1, names are converted to lower case
37 =item split-char - If set, names and values are split on this character instead of =
43 my $split = defined($_[4]) ? $_[4] : "=";
44 my $realfile = &translate_filename($_[0]);
45 &open_readfile(ARFILE, $_[0]) || return 0;
48 my $hash = index($_, "#");
49 my $eq = index($_, $split);
50 if ($hash != 0 && $eq >= 0) {
51 my $n = substr($_, 0, $eq);
52 my $v = substr($_, $eq+1);
54 $_[1]->{$_[3] ? lc($n) : $n} = $v;
55 push(@{$_[2]}, $n) if ($_[2]);
59 $main::read_file_missing{$realfile} = 0; # It exists now
60 if (defined($main::read_file_cache{$realfile})) {
61 %{$main::read_file_cache{$realfile}} = %{$_[1]};
66 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
68 Like read_file, but reads from an in-memory cache if the file has already been
69 read in this Webmin script. Recommended, as it behaves exactly the same as
70 read_file, but can be much faster.
75 my $realfile = &translate_filename($_[0]);
76 if (defined($main::read_file_cache{$realfile})) {
78 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
81 elsif ($main::read_file_missing{$realfile}) {
82 # Doesn't exist, so don't re-try read
86 # Actually read the file
88 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
89 %{$main::read_file_cache{$realfile}} = %d;
90 %{$_[1]} = ( %{$_[1]}, %d );
94 # Flag as non-existant
95 $main::read_file_missing{$realfile} = 1;
101 =head2 write_file(file, &hash, [join-char])
103 Write out the contents of a hash as name=value lines. The parameters are :
105 =item file - Full path to write to
107 =item hash - A hash reference containing names and values to output
109 =item join-char - If given, names and values are separated by this instead of =
115 my $join = defined($_[2]) ? $_[2] : "=";
116 my $realfile = &translate_filename($_[0]);
117 &read_file($_[0], \%old, \@order);
118 &open_tempfile(ARFILE, ">$_[0]");
119 foreach $k (@order) {
120 if (exists($_[1]->{$k})) {
121 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
122 &error(&text("efilewrite", $realfile, $!));
125 foreach $k (keys %{$_[1]}) {
126 if (!exists($old{$k})) {
127 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
128 &error(&text("efilewrite", $realfile, $!));
131 &close_tempfile(ARFILE);
132 if (defined($main::read_file_cache{$realfile})) {
133 %{$main::read_file_cache{$realfile}} = %{$_[1]};
135 if (defined($main::read_file_missing{$realfile})) {
136 $main::read_file_missing{$realfile} = 0;
140 =head2 html_escape(string)
142 Converts &, < and > codes in text to HTML entities, and returns the new string.
143 This should be used when including data read from other sources in HTML pages.
152 $tmp =~ s/\"/"/g;
153 $tmp =~ s/\'/'/g;
158 =head2 quote_escape(string, [only-quote])
160 Converts ' and " characters in a string into HTML entities, and returns it.
161 Useful for outputing HTML tag values.
166 my ($tmp, $only) = @_;
167 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
168 # convert &, unless it is part of &#nnn; or &foo;
169 $tmp =~ s/&([^#])/&$1/g;
171 $tmp =~ s/&$/&/g;
172 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
173 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
177 =head2 tempname([filename])
179 Returns a mostly random temporary file name, typically under the /tmp/.webmin
180 directory. If filename is given, this will be the base name used. Otherwise
181 a unique name is selected randomly.
186 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
187 $gconfig{'tempdir_'.&get_module_name()} :
188 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
189 $ENV{'TEMP'} ? $ENV{'TEMP'} :
190 $ENV{'TMP'} ? $ENV{'TMP'} :
191 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
192 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
193 "$remote_user_info[7]/.tmp" :
194 @remote_user_info ? $tmp_base."-".$remote_user :
195 $< != 0 ? $tmp_base."-".getpwuid($<) :
197 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
198 # On Windows system, just create temp dir if missing
200 mkdir($tmp_dir, 0755) ||
201 &error("Failed to create temp directory $tmp_dir : $!");
205 # On Unix systems, need to make sure temp dir is valid
207 while($tries++ < 10) {
208 my @st = lstat($tmp_dir);
209 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
211 unlink($tmp_dir) || rmdir($tmp_dir) ||
212 system("/bin/rm -rf ".quotemeta($tmp_dir));
214 mkdir($tmp_dir, 0755) || next;
215 chown($<, $(, $tmp_dir);
216 chmod(0755, $tmp_dir);
219 my @st = lstat($tmp_dir);
220 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
224 if (defined($_[0]) && $_[0] !~ /\.\./) {
225 $rv = "$tmp_dir/$_[0]";
228 $main::tempfilecount++;
230 $rv = $tmp_dir."/".int(rand(1000000))."_".
231 $main::tempfilecount."_".$scriptname;
236 =head2 transname([filename])
238 Behaves exactly like tempname, but records the temp file for deletion when the
239 current Webmin script process exits.
244 my $rv = &tempname(@_);
245 push(@main::temporary_files, $rv);
249 =head2 trunc(string, maxlen)
251 Truncates a string to the shortest whole word less than or equal to the
252 given width. Useful for word wrapping.
257 if (length($_[0]) <= $_[1]) {
260 my $str = substr($_[0],0,$_[1]);
269 =head2 indexof(string, value, ...)
271 Returns the index of some value in an array of values, or -1 if it was not
277 for(my $i=1; $i <= $#_; $i++) {
278 if ($_[$i] eq $_[0]) { return $i - 1; }
283 =head2 indexoflc(string, value, ...)
285 Like indexof, but does a case-insensitive match
290 my $str = lc(shift(@_));
291 my @arr = map { lc($_) } @_;
292 return &indexof($str, @arr);
295 =head2 sysprint(handle, [string]+)
297 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
298 as a replacement for print when writing to pipes or sockets.
303 my $fh = &callers_package($_[0]);
304 my $str = join('', @_[1..$#_]);
305 syswrite $fh, $str, length($str);
308 =head2 check_ipaddress(ip)
310 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
315 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
316 $1 >= 0 && $1 <= 255 &&
317 $2 >= 0 && $2 <= 255 &&
318 $3 >= 0 && $3 <= 255 &&
319 $4 >= 0 && $4 <= 255;
322 =head2 check_ip6address(ip)
324 Check if some IPv6 address is properly formatted, and returns 1 if so.
329 my @blocks = split(/:/, $_[0]);
330 return 0 if (@blocks == 0 || @blocks > 8);
332 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
333 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
334 # value is in [0;128].
336 my $where = index($blocks[$ib],"/");
339 my $b = substr($blocks[$ib],0,$where);
340 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
344 # The netmask must take its value in [0;128]
345 return 0 if ($m <0 || $m >128);
347 # Check the different blocks of the address : 16 bits block in hexa notation.
348 # Possibility of 1 empty block or 2 if the address begins with "::".
351 foreach $b (@blocks) {
352 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
353 $empty++ if ($b eq "");
355 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
361 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
363 Prints HTML for an icon image. The parameters are :
365 =item image - URL for the image, like images/foo.gif
367 =item title - Text to appear under the icon
369 =item link - Optional destination for the icon's link
371 =item href - Other HTML attributes to be added to the <a href> for the link
373 =item width - Optional width of the icon
375 =item height - Optional height of the icon
377 =item before-title - HTML to appear before the title link, but which is not actually in the link
379 =item after-title - HTML to appear after the title link, but which is not actually in the link
384 &load_theme_library();
385 if (defined(&theme_generate_icon)) {
386 &theme_generate_icon(@_);
389 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
390 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
391 if ($tconfig{'noicons'}) {
393 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
396 print "$_[6]$_[1]$_[7]\n";
400 print "<table border><tr><td width=48 height=48>\n",
401 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
402 "$w $h></a></td></tr></table>\n";
403 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
406 print "<table border><tr><td width=48 height=48>\n",
407 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
408 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
414 Converts a string to a form ok for putting in a URL, using % escaping.
420 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
424 =head2 un_urlize(string)
426 Converts a URL-encoded string to it's original contents - the reverse of the
434 $rv =~ s/%(..)/pack("c",hex($1))/ge;
438 =head2 include(filename)
440 Read and output the contents of the given file.
446 open(INCLUDE, &translate_filename($_[0])) || return 0;
454 =head2 copydata(in-handle, out-handle)
456 Read from one file handle and write to another, until there is no more to read.
462 $in = &callers_package($in);
463 $out = &callers_package($out);
465 while(read($in, $buf, 1024) > 0) {
466 (print $out $buf) || return 0;
471 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
473 Read data submitted via a POST request using the multipart/form-data coding,
474 and store it in the global %in hash. The optional parameters are :
476 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
478 =item cbfunc - A function reference to call after reading each block of data.
480 =item cbargs - Additional parameters to the callback function.
485 my ($max, $cbfunc, $cbargs) = @_;
486 my ($boundary, $line, $foo, $name, $got, $file);
487 my $err = &text('readparse_max', $max);
488 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
489 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
492 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
494 <STDIN>; # skip first boundary
497 # Read section headers
501 $got += length($line);
502 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
503 if ($max && $got > $max) {
508 if ($line =~ /^(\S+):\s*(.*)$/) {
509 $header{$lastheader = lc($1)} = $2;
511 elsif ($line =~ /^\s+(.*)$/) {
512 $header{$lastheader} .= $line;
516 # Parse out filename and type
517 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
519 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
524 $foo = $name . "_$1";
531 &error($text{'readparse_cdheader'});
533 if ($header{'content-type'} =~ /^([^\s;]+)/) {
534 $foo = $name . "_content_type";
537 $file = $in{$name."_filename"};
540 $in{$name} .= "\0" if (defined($in{$name}));
543 $got += length($line);
544 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
546 if ($max && $got > $max) {
547 #print STDERR "over limit of $max\n";
552 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
557 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
558 if (index($line, $boundary) != -1) { last; }
561 chop($in{$name}); chop($in{$name});
562 if (index($line,"$boundary--") != -1) { last; }
564 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
567 =head2 ReadParse([&hash], [method], [noplus])
569 Fills the given hash reference with CGI parameters, or uses the global hash
570 %in if none is given. Also sets the global variables $in and @in. The other
573 =item method - For use of this HTTP method, such as GET
575 =item noplus - Don't convert + in parameters to spaces.
580 my $a = $_[0] || \%in;
582 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
584 if ($meth eq 'POST') {
585 my $clen = $ENV{'CONTENT_LENGTH'};
586 &read_fully(STDIN, \$in, $clen) == $clen ||
587 &error("Failed to read POST input : $!");
589 if ($ENV{'QUERY_STRING'}) {
590 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
591 else { $in = $ENV{'QUERY_STRING'}; }
593 @in = split(/\&/, $in);
594 foreach my $i (@in) {
595 my ($k, $v) = split(/=/, $i, 2);
600 $k =~ s/%(..)/pack("c",hex($1))/ge;
601 $v =~ s/%(..)/pack("c",hex($1))/ge;
602 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
606 =head2 read_fully(fh, &buffer, length)
608 Read data from some file handle up to the given length, even in the face
609 of partial reads. Reads the number of bytes read. Stores received data in the
610 string pointed to be the buffer reference.
615 my ($fh, $buf, $len) = @_;
616 $fh = &callers_package($fh);
619 my $r = read(STDIN, $$buf, $len-$got, $got);
626 =head2 read_parse_mime_callback(size, totalsize, upload-id)
628 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
629 the file on every 1% change though. For internal use by the upload progress
633 sub read_parse_mime_callback
635 my ($size, $totalsize, $filename, $id) = @_;
636 return if ($gconfig{'no_upload_tracker'});
639 # Create the upload tracking directory - if running as non-root, this has to
640 # be under the user's home
643 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
644 $vardir = "$uinfo[7]/.tmp";
647 $vardir = $ENV{'WEBMIN_VAR'};
650 &make_dir($vardir, 0755);
653 # Remove any upload.* files more than 1 hour old
654 if (!$main::read_parse_mime_callback_flushed) {
656 opendir(UPDIR, $vardir);
657 foreach my $f (readdir(UPDIR)) {
658 next if ($f !~ /^upload\./);
659 my @st = stat("$vardir/$f");
660 if ($st[9] < $now-3600) {
661 unlink("$vardir/$f");
665 $main::read_parse_mime_callback_flushed++;
668 # Only update file once per percent
669 my $upfile = "$vardir/upload.$id";
670 if ($totalsize && $size >= 0) {
671 my $pc = int(100 * $size / $totalsize);
672 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
675 $main::read_parse_mime_callback_pc{$upfile} = $pc;
679 &open_tempfile(UPFILE, ">$upfile");
680 print UPFILE $size,"\n";
681 print UPFILE $totalsize,"\n";
682 print UPFILE $filename,"\n";
683 &close_tempfile(UPFILE);
686 =head2 read_parse_mime_javascript(upload-id, [&fields])
688 Returns an onSubmit= Javascript statement to popup a window for tracking
689 an upload with the given ID. For internal use by the upload progress tracker.
692 sub read_parse_mime_javascript
694 my ($id, $fields) = @_;
695 return "" if ($gconfig{'no_upload_tracker'});
696 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
698 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
699 return "onSubmit='if ($if) { $opener }'";
702 return "onSubmit='$opener'";
706 =head2 PrintHeader(charset)
708 Outputs the HTTP headers for an HTML page. The optional charset parameter
709 can be used to set a character set. Normally this function is not called
710 directly, but is rather called by ui_print_header or header.
715 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
716 print "pragma: no-cache\n";
717 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
718 print "Cache-Control: no-store, no-cache, must-revalidate\n";
719 print "Cache-Control: post-check=0, pre-check=0\n";
721 if (defined($_[0])) {
722 print "Content-type: text/html; Charset=$_[0]\n\n";
725 print "Content-type: text/html\n\n";
729 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
731 Outputs a Webmin HTML page header with a title, including HTTP headers. The
734 =item title - The text to show at the top of the page
736 =item image - An image to show instead of the title text. This is typically left blank.
738 =item help - If set, this is the name of a help page that will be linked to in the title.
740 =item config - If set to 1, the title will contain a link to the module's config page.
742 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
744 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
746 =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.
748 =item head-stuff - HTML to be included in the <head> section of the page.
750 =item body-stuff - HTML attributes to be include in the <body> tag.
752 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
757 return if ($main::done_webmin_header++);
759 my $charset = defined($main::force_charset) ? $main::force_charset
761 &PrintHeader($charset);
762 &load_theme_library();
763 if (defined(&theme_header)) {
764 $module_name = &get_module_name();
768 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
771 if (defined(&theme_prehead)) {
775 print "<meta http-equiv=\"Content-Type\" ",
776 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
779 my $title = &get_html_title($_[0]);
780 print "<title>$title</title>\n";
781 print $_[7] if ($_[7]);
782 print &get_html_status_line(0);
784 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
785 if ($tconfig{'headinclude'}) {
787 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
794 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
795 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
796 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
797 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
798 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
799 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
800 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
802 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
804 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
805 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
806 if (defined(&theme_prebody)) {
809 my $hostname = &get_display_hostname();
810 my $version = &get_webmin_version();
811 my $prebody = $tconfig{'prebody'};
813 $prebody =~ s/%HOSTNAME%/$hostname/g;
814 $prebody =~ s/%VERSION%/$version/g;
815 $prebody =~ s/%USER%/$remote_user/g;
816 $prebody =~ s/%OS%/$os_type $os_version/g;
819 if ($tconfig{'prebodyinclude'}) {
821 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
828 print $tconfig{'preheader'};
829 my %this_module_info = &get_module_info(&get_module_name());
830 print "<table class='header' width=100%><tr>\n";
831 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
832 print "<td id='headln1' colspan=3 align=center>\n";
833 print &get_html_status_line(1);
834 print "</td></tr> <tr>\n";
836 print "<td id='headln2l' width=15% valign=top align=left>";
837 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
838 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
839 "$text{'header_servers'}</a><br>\n";
841 if (!$_[5] && !$tconfig{'noindex'}) {
842 my @avail = &get_available_module_infos(1);
843 my $nolo = $ENV{'ANONYMOUS_USER'} ||
844 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
845 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
846 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
848 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
849 "$text{'main_logout'}</a><br>";
851 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
852 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
853 "$text{'main_switch'}</a><br>";
855 elsif (!$gconfig{'gotoone'} || @avail > 1) {
856 print "<a href='$gconfig{'webprefix'}/?cat=",
857 $this_module_info{'category'},
858 "'>$text{'header_webmin'}</a><br>\n";
861 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
862 my $idx = $this_module_info{'index_link'};
863 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
864 my $mt = $module_index_name || $text{'header_module'};
865 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
867 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
868 !$tconfig{'nohelp'}) {
869 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
872 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
873 !$tconfig{'nohelp'}) {
874 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
877 my %access = &get_module_acl();
878 if (!$access{'noconfig'} && !$config{'noprefs'}) {
879 my $cprog = $user_module_config_directory ?
880 "uconfig.cgi" : "config.cgi";
881 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
882 &get_module_name()."\">",
883 $text{'header_config'},"</a><br>\n";
888 # Title is a single image
889 print "<td id='headln2c' align=center width=70%>",
890 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
894 my $ts = defined($tconfig{'titlesize'}) ?
895 $tconfig{'titlesize'} : "+2";
896 print "<td id='headln2c' align=center width=70%>",
897 ($ts ? "<font size=$ts>" : ""),$_[0],
898 ($ts ? "</font>" : "");
899 print "<br>$_[9]\n" if ($_[9]);
902 print "<td id='headln2r' width=15% valign=top align=right>";
904 print "</td></tr></table>\n";
905 print $tconfig{'postheader'};
909 =head2 get_html_title(title)
911 Returns the full string to appear in the HTML <title> block.
918 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
919 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
920 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
921 $title = sprintf "%s : %s on %s (%s %s)\n",
922 $msg, $remote_user, &get_display_hostname(),
923 $os_type, $os_version;
925 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
926 $title = sprintf "%s on %s (%s %s)\n",
927 $remote_user, &get_display_hostname(),
928 $os_type, $os_version;
933 if ($gconfig{'showlogin'} && $remote_user) {
934 $title = $remote_user." : ".$title;
939 =head2 get_html_framed_title
941 Returns the title text for a framed theme main page.
944 sub get_html_framed_title
947 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
948 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
950 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
951 # Alternate title mode requested
952 $title = sprintf "%s on %s (%s %s)\n",
953 $remote_user, &get_display_hostname(),
954 $os_type, $os_version;
957 # Title like 'Webmin x.yy on hostname (Linux 6)'
958 if ($os_version eq "*") {
962 $ostr = "$os_type $os_version";
964 my $host = &get_display_hostname();
965 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
966 &text('main_title', &get_webmin_version(), $host, $ostr);
967 if ($gconfig{'showlogin'}) {
968 $title = $remote_user." : ".$title;
974 =head2 get_html_status_line(text-only)
976 Returns HTML for a script block that sets the status line, or if text-only
977 is set to 1, just return the status line text.
980 sub get_html_status_line
983 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
984 # Disabled in this mode
987 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
988 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
989 my $line = &text('header_statusmsg',
990 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
992 ($ENV{'SSL_USER'} ? " (SSL certified)" :
993 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
994 $text{'programname'},
995 &get_webmin_version(),
996 &get_display_hostname(),
997 $os_type.($os_version eq "*" ? "" :" $os_version"));
1002 $line =~ s/\r|\n//g;
1003 return "<script language=JavaScript type=text/javascript>\n".
1004 "defaultStatus=\""."e_escape($line)."\";\n".
1009 =head2 popup_header([title], [head-stuff], [body-stuff])
1011 Outputs a page header, suitable for a popup window. If no title is given,
1012 absolutely no decorations are output. Also useful in framesets. The parameters
1015 =item title - Title text for the popup window.
1017 =item head-stuff - HTML to appear in the <head> section.
1019 =item body-stuff - HTML attributes to be include in the <body> tag.
1024 return if ($main::done_webmin_header++);
1026 my $charset = defined($main::force_charset) ? $main::force_charset
1028 &PrintHeader($charset);
1029 &load_theme_library();
1030 if (defined(&theme_popup_header)) {
1031 &theme_popup_header(@_);
1034 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1037 if (defined(&theme_popup_prehead)) {
1038 &theme_popup_prehead(@_);
1040 print "<title>$_[0]</title>\n";
1042 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1043 if ($tconfig{'headinclude'}) {
1045 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
1052 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1053 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1054 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1055 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1056 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1057 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1058 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1060 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1061 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1062 if (defined(&theme_popup_prebody)) {
1063 &theme_popup_prebody(@_);
1067 =head2 footer([page, name]+, [noendbody])
1069 Outputs the footer for a Webmin HTML page, possibly with links back to other
1070 pages. The links are specified by pairs of parameters, the first of which is
1071 a link destination, and the second the link text. For example :
1073 footer('/', 'Webmin index', '', 'Module menu');
1078 &load_theme_library();
1079 my %this_module_info = &get_module_info(&get_module_name());
1080 if (defined(&theme_footer)) {
1081 $module_name = &get_module_name(); # Old themes use these
1082 %module_info = %this_module_info;
1086 for(my $i=0; $i+1<@_; $i+=2) {
1088 if ($url ne '/' || !$tconfig{'noindex'}) {
1090 $url = "/?cat=$this_module_info{'category'}";
1092 elsif ($url eq '' && &get_module_name()) {
1093 $url = "/".&get_module_name()."/".
1094 $this_module_info{'index_link'};
1096 elsif ($url =~ /^\?/ && &get_module_name()) {
1097 $url = "/".&get_module_name()."/$url";
1099 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1101 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1106 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1111 my $postbody = $tconfig{'postbody'};
1113 my $hostname = &get_display_hostname();
1114 my $version = &get_webmin_version();
1115 my $os_type = $gconfig{'real_os_type'} ||
1116 $gconfig{'os_type'};
1117 my $os_version = $gconfig{'real_os_version'} ||
1118 $gconfig{'os_version'};
1119 $postbody =~ s/%HOSTNAME%/$hostname/g;
1120 $postbody =~ s/%VERSION%/$version/g;
1121 $postbody =~ s/%USER%/$remote_user/g;
1122 $postbody =~ s/%OS%/$os_type $os_version/g;
1123 print "$postbody\n";
1125 if ($tconfig{'postbodyinclude'}) {
1127 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1133 if (defined(&theme_postbody)) {
1134 &theme_postbody(@_);
1136 print "</body></html>\n";
1142 Outputs html for a footer for a popup window, started by popup_header.
1147 &load_theme_library();
1148 if (defined(&theme_popup_footer)) {
1149 &theme_popup_footer(@_);
1152 print "</body></html>\n";
1155 =head2 load_theme_library
1157 Immediately loads the current theme's theme.pl file. Not generally useful for
1158 most module developers, as this is called automatically by the header function.
1161 sub load_theme_library
1163 return if (!$current_theme || $loaded_theme_library++);
1164 for(my $i=0; $i<@theme_root_directories; $i++) {
1165 if ($theme_configs[$i]->{'functions'}) {
1166 do $theme_root_directories[$i]."/".
1167 $theme_configs[$i]->{'functions'};
1172 =head2 redirect(url)
1174 Output HTTP headers to redirect the browser to some page. The url parameter is
1175 typically a relative URL like index.cgi or list_users.cgi.
1180 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1181 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1182 ":$ENV{'SERVER_PORT'}";
1183 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1184 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1186 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1187 # Absolute URL (like http://...)
1190 elsif ($_[0] =~ /^\//) {
1191 # Absolute path (like /foo/bar.cgi)
1192 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1194 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1195 # Relative URL (like foo.cgi)
1196 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1199 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1201 &load_theme_library();
1202 if (defined(&theme_redirect)) {
1203 $module_name = &get_module_name(); # Old themes use these
1204 %module_info = &get_module_info($module_name);
1205 &theme_redirect($_[0], $url);
1208 print "Location: $url\n\n";
1212 =head2 kill_byname(name, signal)
1214 Finds a process whose command line contains the given name (such as httpd), and
1215 sends some signal to it. The signal can be numeric (like 9) or named
1221 my @pids = &find_byname($_[0]);
1222 return scalar(@pids) if (&is_readonly_mode());
1223 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1224 if ($gconfig{'debug_what_procs'});
1225 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1229 =head2 kill_byname_logged(name, signal)
1231 Like kill_byname, but also logs the killing.
1234 sub kill_byname_logged
1236 my @pids = &find_byname($_[0]);
1237 return scalar(@pids) if (&is_readonly_mode());
1238 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1242 =head2 find_byname(name)
1244 Finds processes searching for the given name in their command lines, and
1245 returns a list of matching PIDs.
1250 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1251 # Linux with /proc filesystem .. use cmdline files, as this is
1252 # faster than forking
1254 opendir(PROCDIR, "/proc");
1255 foreach my $f (readdir(PROCDIR)) {
1256 if ($f eq int($f) && $f != $$) {
1257 my $line = &read_file_contents("/proc/$f/cmdline");
1258 if ($line =~ /$_[0]/) {
1267 if (&foreign_check("proc")) {
1268 # Call the proc module
1269 &foreign_require("proc", "proc-lib.pl");
1270 if (defined(&proc::list_processes)) {
1271 my @procs = &proc::list_processes();
1273 foreach my $p (@procs) {
1274 if ($p->{'args'} =~ /$_[0]/) {
1275 push(@pids, $p->{'pid'});
1278 @pids = grep { $_ != $$ } @pids;
1283 # Fall back to running a command
1285 $cmd = $gconfig{'find_pid_command'};
1286 $cmd =~ s/NAME/"$_[0]"/g;
1287 $cmd = &translate_command($cmd);
1288 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1289 @pids = grep { $_ != $$ } @pids;
1293 =head2 error([message]+)
1295 Display an error message and exit. This should be used by CGI scripts that
1296 encounter a fatal error or invalid user input to notify users of the problem.
1297 If error_setup has been called, the displayed error message will be prefixed
1298 by the message setup using that function.
1303 my $msg = join("", @_);
1304 $msg =~ s/<[^>]*>//g;
1305 if (!$main::error_must_die) {
1306 print STDERR "Error: ",$msg,"\n";
1308 &load_theme_library();
1309 if ($main::error_must_die) {
1310 if ($gconfig{'error_stack'}) {
1311 print STDERR "Error: ",$msg,"\n";
1312 for(my $i=0; my @stack = caller($i); $i++) {
1313 print STDERR "File: $stack[1] Line: $stack[2] ",
1314 "Function: $stack[3]\n";
1319 elsif (!$ENV{'REQUEST_METHOD'}) {
1320 # Show text-only error
1321 print STDERR "$text{'error'}\n";
1322 print STDERR "-----\n";
1323 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1325 print STDERR "-----\n";
1326 if ($gconfig{'error_stack'}) {
1328 print STDERR $text{'error_stack'},"\n";
1329 for(my $i=0; my @stack = caller($i); $i++) {
1330 print STDERR &text('error_stackline',
1331 $stack[1], $stack[2], $stack[3]),"\n";
1336 elsif (defined(&theme_error)) {
1340 &header($text{'error'}, "");
1342 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1344 if ($gconfig{'error_stack'}) {
1346 print "<h3>$text{'error_stack'}</h3>\n";
1348 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1349 "<td><b>$text{'error_line'}</b></td> ",
1350 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1351 for($i=0; my @stack = caller($i); $i++) {
1353 print "<td>$stack[1]</td>\n";
1354 print "<td>$stack[2]</td>\n";
1355 print "<td>$stack[3]</td>\n";
1361 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1362 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1368 &unlock_all_files();
1369 &cleanup_tempnames();
1373 =head2 popup_error([message]+)
1375 This function is almost identical to error, but displays the message with HTML
1376 headers suitable for a popup window.
1381 &load_theme_library();
1382 if ($main::error_must_die) {
1385 elsif (defined(&theme_popup_error)) {
1386 &theme_popup_error(@_);
1389 &popup_header($text{'error'}, "");
1390 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1393 &unlock_all_files();
1394 &cleanup_tempnames();
1398 =head2 error_setup(message)
1400 Registers a message to be prepended to all error messages displayed by the
1406 $main::whatfailed = $_[0];
1409 =head2 wait_for(handle, regexp, regexp, ...)
1411 Reads from the input stream until one of the regexps matches, and returns the
1412 index of the matching regexp, or -1 if input ended before any matched. This is
1413 very useful for parsing the output of interactive programs, and can be used with
1414 a two-way pipe to feed input to a program in response to output matched by
1417 If the matching regexp contains bracketed sub-expressions, their values will
1418 be placed in the global array @matches, indexed starting from 1. You cannot
1419 use the Perl variables $1, $2 and so on to capture matches.
1423 $rv = wait_for($loginfh, "username:");
1425 error("Didn't get username prompt");
1427 print $loginfh "joe\n";
1428 $rv = wait_for($loginfh, "password:");
1430 error("Didn't get password prompt");
1432 print $loginfh "smeg\n";
1437 my ($c, $i, $sw, $rv, $ha);
1438 undef($wait_for_input);
1439 if ($wait_for_debug) {
1440 print STDERR "wait_for(",join(",", @_),")\n";
1442 $ha = &callers_package($_[0]);
1443 if ($wait_for_debug) {
1444 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1449 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1450 " \$wait_for_input .= \$c;\n";
1451 if ($wait_for_debug) {
1452 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1454 for($i=1; $i<@_; $i++) {
1455 $sw = $i>1 ? "elsif" : "if";
1456 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1459 " if (defined(\$hit)) {\n".
1460 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1466 &error("wait_for error : $@\n");
1471 =head2 fast_wait_for(handle, string, string, ...)
1473 This function behaves very similar to wait_for (documented above), but instead
1474 of taking regular expressions as parameters, it takes strings. As soon as the
1475 input contains one of them, it will return the index of the matching string.
1476 If the input ends before any match, it returns -1.
1481 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1482 for($i=1; $i<@_; $i++) {
1483 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1487 if (($c = getc($ha)) eq "") {
1488 &error("fast_wait_for read error : $!");
1491 if (length($inp) > $maxlen) {
1492 $inp = substr($inp, length($inp)-$maxlen);
1494 $inpl = length($inp);
1495 for($i=1; $i<@_; $i++) {
1496 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1503 =head2 has_command(command)
1505 Returns the full path to the executable if some command is in the path, or
1506 undef if not found. If the given command is already an absolute path and
1507 exists, then the same path will be returned.
1512 if (!$_[0]) { return undef; }
1513 if (exists($main::has_command_cache{$_[0]})) {
1514 return $main::has_command_cache{$_[0]};
1517 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1518 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1519 # Absolute path given - just use it
1520 my $t = &translate_filename($_[0]);
1521 $rv = (-x $t && !-d _) ? $_[0] : undef;
1524 # Check each directory in the path
1526 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1527 next if ($donedir{$d}++);
1528 $d =~ s/$slash$// if ($d ne $slash);
1529 my $t = &translate_filename("$d/$_[0]");
1530 if (-x $t && !-d _) {
1531 $rv = $d.$slash.$_[0];
1534 if ($gconfig{'os_type'} eq 'windows') {
1535 foreach my $sfx (".exe", ".com", ".bat") {
1536 my $t = &translate_filename("$d/$_[0]").$sfx;
1537 if (-r $t && !-d _) {
1538 $rv = $d.$slash.$_[0].$sfx;
1545 $main::has_command_cache{$_[0]} = $rv;
1549 =head2 make_date(seconds, [date-only], [fmt])
1551 Converts a Unix date/time in seconds to a human-readable form, by default
1552 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1554 =item seconds - Unix time is seconds to convert.
1556 =item date-only - If set to 1, exclude the time from the returned string.
1558 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1563 my ($secs, $only, $fmt) = @_;
1564 my @tm = localtime($secs);
1567 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1569 if ($fmt eq 'dd/mon/yyyy') {
1570 $date = sprintf "%2.2d/%s/%4.4d",
1571 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1573 elsif ($fmt eq 'dd/mm/yyyy') {
1574 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1576 elsif ($fmt eq 'mm/dd/yyyy') {
1577 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1579 elsif ($fmt eq 'yyyy/mm/dd') {
1580 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1583 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1588 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1590 Return HTML for a button that pops up a file chooser when clicked, and places
1591 the selected filename into another HTML field. The parameters are :
1593 =item input - Name of the form field to store the filename in.
1595 =item type - 0 for file or directory chooser, or 1 for directory only.
1597 =item form - Index of the form containing the button.
1599 =item chroot - If set to 1, the chooser will be limited to this directory.
1601 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1604 sub file_chooser_button
1606 return &theme_file_chooser_button(@_)
1607 if (defined(&theme_file_chooser_button));
1608 my $form = defined($_[2]) ? $_[2] : 0;
1609 my $chroot = defined($_[3]) ? $_[3] : "/";
1610 my $add = int($_[4]);
1611 my ($w, $h) = (400, 300);
1612 if ($gconfig{'db_sizefile'}) {
1613 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1615 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";
1618 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1620 Returns HTML for a button that will popup a chooser window of some kind. The
1623 =item url - Base URL of the popup window's contents
1625 =item width - Width of the window in pixels
1627 =item height - Height in pixels
1629 =item scrollbars - Set to 1 if the window should have scrollbars
1631 The field-mappings parameter is an array ref of array refs containing
1633 =item - Attribute to assign field to in the popup window
1635 =item - Form field name
1637 =item - CGI parameter to URL for value, if any
1640 sub popup_window_button
1642 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1643 my ($url, $w, $h, $scroll, $fields) = @_;
1644 my $scrollyn = $scroll ? "yes" : "no";
1645 my $rv = "<input type=button onClick='";
1646 foreach my $m (@$fields) {
1647 $rv .= "$m->[0] = form.$m->[1]; ";
1649 my $sep = $url =~ /\?/ ? "&" : "?";
1650 $rv .= "chooser = window.open(\"$url\"";
1651 foreach my $m (@$fields) {
1653 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1657 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1658 foreach my $m (@$fields) {
1659 $rv .= "chooser.$m->[0] = $m->[0]; ";
1660 $rv .= "window.$m->[0] = $m->[0]; ";
1662 $rv .= "' value=\"...\">";
1666 =head2 read_acl(&user-module-hash, &user-list-hash)
1668 Reads the Webmin acl file into the given hash references. The first is indexed
1669 by a combined key of username,module , with the value being set to 1 when
1670 the user has access to that module. The second is indexed by username, with
1671 the value being an array ref of allowed modules.
1673 This function is deprecated in favour of foreign_available, which performs a
1674 more comprehensive check of module availability.
1679 if (!defined(%main::acl_hash_cache)) {
1681 open(ACL, &acl_filename());
1683 if (/^([^:]+):\s*(.*)/) {
1685 my @mods = split(/\s+/, $2);
1686 foreach my $m (@mods) {
1687 $main::acl_hash_cache{$user,$m}++;
1689 $main::acl_array_cache{$user} = \@mods;
1694 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1695 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1700 Returns the file containing the webmin ACL, which is usually
1701 /etc/webmin/webmin.acl.
1706 return "$config_directory/webmin.acl";
1711 Does nothing, but kept around for compatability.
1718 =head2 get_miniserv_config(&hash)
1720 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1721 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1725 sub get_miniserv_config
1727 return &read_file_cached(
1728 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1731 =head2 put_miniserv_config(&hash)
1733 Writes out the Webmin webserver configuration file from the contents of
1734 the given hash ref. This should be initially populated by get_miniserv_config,
1737 get_miniserv_config(\%miniserv);
1738 $miniserv{'port'} = 10005;
1739 put_miniserv_config(\%miniserv);
1743 sub put_miniserv_config
1745 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1749 =head2 restart_miniserv([nowait])
1751 Kill the old miniserv process and re-start it, then optionally waits for
1752 it to restart. This will apply all configuration settings.
1755 sub restart_miniserv
1758 return undef if (&is_readonly_mode());
1760 &get_miniserv_config(\%miniserv) || return;
1763 if ($gconfig{'os_type'} ne 'windows') {
1764 # On Unix systems, we can restart with a signal
1765 my ($pid, $addr, $i);
1766 $miniserv{'inetd'} && return;
1767 my @oldst = stat($miniserv{'pidfile'});
1768 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1771 if (!$pid) { &error("Invalid PID file"); }
1773 # Just signal miniserv to restart
1774 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1776 # Wait till new PID is written, indicating a restart
1777 for($i=0; $i<60; $i++) {
1779 my @newst = stat($miniserv{'pidfile'});
1780 last if ($newst[9] != $oldst[9]);
1782 $i < 60 || &error("Webmin server did not write new PID file");
1784 ## Totally kill the process and re-run it
1785 #$SIG{'TERM'} = 'IGNORE';
1786 #&kill_logged('TERM', $pid);
1787 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1790 # On Windows, we need to use the flag file
1791 open(TOUCH, ">$miniserv{'restartflag'}");
1796 # wait for miniserv to come back up
1797 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1799 for($i=0; $i<20; $i++) {
1801 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1802 my $rv = connect(STEST,
1803 pack_sockaddr_in($miniserv{'port'}, $addr));
1805 last if ($rv && ++$ok >= 2);
1807 $i < 20 || &error("Failed to restart Webmin server!");
1811 =head2 reload_miniserv
1813 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1814 configuration files. Not all changes will be applied though, such as the
1815 IP addresses and ports to accept connections on.
1820 return undef if (&is_readonly_mode());
1822 &get_miniserv_config(\%miniserv) || return;
1824 if ($gconfig{'os_type'} ne 'windows') {
1825 # Send a USR1 signal to re-read the config
1826 my ($pid, $addr, $i);
1827 $miniserv{'inetd'} && return;
1828 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1831 if (!$pid) { &error("Invalid PID file"); }
1832 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1834 # Make sure this didn't kill Webmin!
1836 if (!kill(0, $pid)) {
1837 print STDERR "USR1 signal killed Webmin - restarting\n";
1838 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1842 # On Windows, we need to use the flag file
1843 open(TOUCH, ">$miniserv{'reloadflag'}");
1848 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1850 Returns 1 if some module is supported on the current operating system, or the
1851 OS supplies as parameters. The parameters are :
1853 =item minfo - A hash ref of module information, as returned by get_module_info
1855 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1857 =item os-version - The Webmin OS version to use, such as 13.0
1859 =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.
1862 sub check_os_support
1864 my $oss = $_[0]->{'os_support'};
1865 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1866 # May provide usable API
1867 $oss .= " ".$_[0]->{'api_os_support'};
1869 if ($_[0]->{'nozone'} && &running_in_zone()) {
1870 # Not supported in a Solaris Zone
1873 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1874 # Not supported in a Linux Vserver
1877 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1878 # Not supported in an OpenVZ container
1881 return 1 if (!$oss || $oss eq '*');
1882 my $osver = $_[2] || $gconfig{'os_version'};
1883 my $ostype = $_[1] || $gconfig{'os_type'};
1886 my ($os, $ver, $codes);
1887 my ($neg) = ($oss =~ s/^!//); # starts with !
1888 $anyneg++ if ($neg);
1889 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1891 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1893 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1895 $os = $1; $ver = $2; $oss = $3;
1897 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1899 $os = $1; $codes = $2; $oss = $3;
1901 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1903 $codes = $1; $oss = $2;
1905 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1907 $os = $1; $oss = $2;
1910 next if ($os && !($os eq $ostype ||
1911 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1912 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1913 next if ($osver < $1 || $osver > $2);
1915 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1916 next if ($osver < $1);
1918 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1919 next if ($osver > $1);
1922 next if ($ver ne $osver);
1924 next if ($codes && !eval $codes);
1930 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1932 Downloads data from a HTTP url to a local file or string. The parameters are :
1934 =item host - The hostname part of the URL, such as www.google.com
1936 =item port - The HTTP port number, such as 80
1938 =item page - The filename part of the URL, like /index.html
1940 =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.
1942 =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.
1944 =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.
1946 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
1948 =item user - If set, HTTP authentication is done with this username.
1950 =item pass - The HTTP password to use with the username above.
1952 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
1954 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
1956 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
1958 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
1963 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
1964 $timeout, $osdn, $nocache, $headers) = @_;
1965 if ($gconfig{'debug_what_net'}) {
1966 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
1967 ($user ? " user=$user pass=$pass" : "").
1968 (ref($dest) ? "" : " dest=$dest"));
1971 # Convert OSDN URL first
1972 my $prot = $ssl ? "https://" : "http://";
1973 my $portstr = $ssl && $port == 443 ||
1974 !$ssl && $port == 80 ? "" : ":$port";
1975 ($host, $port, $page, $ssl) = &parse_http_url(
1976 &convert_osdn_url($prot.$host.$portstr.$page));
1979 # Check if we already have cached the URL
1980 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
1981 my $cfile = &check_in_http_cache($url);
1982 if ($cfile && !$nocache) {
1983 # Yes! Copy to dest file or variable
1984 &$cbfunc(6, $url) if ($cbfunc);
1986 &open_readfile(CACHEFILE, $cfile);
1988 $$dest = <CACHEFILE>;
1992 ©_source_dest($cfile, $dest);
1999 push(@headers, [ "Host", $host ]);
2000 push(@headers, [ "User-agent", "Webmin" ]);
2002 my $auth = &encode_base64("$user:$pass");
2003 $auth =~ tr/\r\n//d;
2004 push(@headers, [ "Authorization", "Basic $auth" ]);
2006 foreach my $hname (keys %$headers) {
2007 push(@headers, [ $hname, $headers->{$hname} ]);
2010 # Actually download it
2011 $main::download_timed_out = undef;
2012 local $SIG{ALRM} = \&download_timeout;
2013 alarm($timeout || 60);
2014 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2016 $h = $main::download_timed_out if ($main::download_timed_out);
2018 if ($error) { $$error = $h; return; }
2019 else { &error($h); }
2021 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2023 if ((!$error || !$$error) && !$nocache) {
2024 &write_to_http_cache($url, $dest);
2028 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl])
2030 Do a HTTP download, after the headers have been sent. For internal use only,
2031 typically called by http_download.
2034 sub complete_http_download
2036 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2042 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2043 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2045 if ($_[2]) { ${$_[2]} = $line; return; }
2046 else { &error("Download failed : $line"); }
2049 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2052 $line = &read_http_connection($_[0]);
2053 $line =~ tr/\r\n//d;
2054 $line =~ /^(\S+):\s+(.*)$/ || last;
2055 $header{lc($1)} = $2;
2056 push(@headers, [ lc($1), $2 ]);
2059 if ($main::download_timed_out) {
2060 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2061 else { &error($main::download_timed_out); }
2063 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2064 if ($rcode >= 300 && $rcode < 400) {
2065 # follow the redirect
2066 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2067 my ($host, $port, $page, $ssl);
2068 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2069 $ssl = $1 eq 'https' ? 1 : 0;
2070 $host = $2; $port = $3; $page = $4 || "/";
2072 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2073 $ssl = $1 eq 'https' ? 1 : 0;
2074 $host = $2; $port = 80; $page = $3 || "/";
2076 elsif ($header{'location'} =~ /^\// && $_[5]) {
2077 # Relative to same server
2081 $page = $header{'location'};
2083 elsif ($header{'location'}) {
2084 # Assume relative to same dir .. not handled
2085 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2086 else { &error("Invalid Location header $header{'location'}"); }
2089 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2090 else { &error("Missing Location header"); }
2093 ($page, $params) = split(/\?/, $page);
2095 $page .= "?".$params if (defined($params));
2096 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2097 undef, undef, undef, $_[4], 0, $_[7]);
2102 # Append to a variable
2103 while(defined($buf = &read_http_connection($_[0], 1024))) {
2105 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2111 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2112 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2113 else { &error("Failed to write to $_[1] : $!"); }
2115 binmode(PFILE); # For windows
2116 while(defined($buf = &read_http_connection($_[0], 1024))) {
2117 &print_tempfile(PFILE, $buf);
2118 $got += length($buf);
2119 &$cbfunc(3, $got) if ($cbfunc);
2121 &close_tempfile(PFILE);
2122 if ($header{'content-length'} &&
2123 $got != $header{'content-length'}) {
2124 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2125 else { &error("Download incomplete"); }
2128 &$cbfunc(4) if ($cbfunc);
2130 &close_http_connection($_[0]);
2134 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2136 Download data from an FTP site to a local file. The parameters are :
2138 =item host - FTP server hostname
2140 =item file - File on the FTP server to download
2142 =item destfile - File on the Webmin system to download data to
2144 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2146 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2148 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2150 =item pass - Password for the username above.
2152 =item port - FTP server port number, which defaults to 21 if not set.
2157 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2159 if ($gconfig{'debug_what_net'}) {
2160 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2161 ($user ? " user=$user pass=$pass" : "").
2162 (ref($dest) ? "" : " dest=$dest"));
2166 if (&is_readonly_mode()) {
2167 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2169 else { &error("FTP connections not allowed in readonly mode"); }
2172 # Check if we already have cached the URL
2173 my $url = "ftp://".$host.$file;
2174 my $cfile = &check_in_http_cache($url);
2176 # Yes! Copy to dest file or variable
2177 &$cbfunc(6, $url) if ($cbfunc);
2179 &open_readfile(CACHEFILE, $cfile);
2181 $$dest = <CACHEFILE>;
2185 ©_source_dest($cfile, $dest);
2190 # Actually download it
2191 $main::download_timed_out = undef;
2192 local $SIG{ALRM} = \&download_timeout;
2195 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2196 # download through http-style proxy
2198 if (&open_socket($1, $2, "SOCK", \$error)) {
2200 if ($main::download_timed_out) {
2202 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2203 else { &error($main::download_timed_out); }
2205 my $esc = $_[1]; $esc =~ s/ /%20/g;
2206 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2207 my $portstr = $port == 21 ? "" : ":$port";
2208 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2209 print SOCK "User-agent: Webmin\r\n";
2210 if ($gconfig{'proxy_user'}) {
2211 my $auth = &encode_base64(
2212 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2213 $auth =~ tr/\r\n//d;
2214 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2217 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2220 elsif (!$gconfig{'proxy_fallback'}) {
2222 if ($error) { $$error = $main::download_timed_out; return 0; }
2223 else { &error($main::download_timed_out); }
2228 # connect to host and login with real FTP protocol
2229 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2231 if ($main::download_timed_out) {
2232 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2233 else { &error($main::download_timed_out); }
2235 &ftp_command("", 2, $_[3]) || return 0;
2237 # Login as supplied user
2238 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2240 if (int($urv[1]/100) == 3) {
2241 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2245 # Login as anonymous
2246 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2248 if (int($urv[1]/100) == 3) {
2249 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2253 &$cbfunc(1, 0) if ($cbfunc);
2256 # get the file size and tell the callback
2257 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2258 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2259 defined($size) || return 0;
2261 &$cbfunc(2, int($size));
2265 my $pasv = &ftp_command("PASV", 2, $_[3]);
2266 defined($pasv) || return 0;
2267 $pasv =~ /\(([0-9,]+)\)/;
2268 @n = split(/,/ , $1);
2269 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2270 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2271 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2275 &open_tempfile(PFILE, ">$_[2]", 1);
2276 while(read(CON, $buf, 1024) > 0) {
2277 &print_tempfile(PFILE, $buf);
2278 $got += length($buf);
2279 &$cbfunc(3, $got) if ($cbfunc);
2281 &close_tempfile(PFILE);
2283 if ($got != $size) {
2284 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2285 else { &error("Download incomplete"); }
2287 &$cbfunc(4) if ($cbfunc);
2289 &ftp_command("", 2, $_[3]) || return 0;
2293 &ftp_command("QUIT", 2, $_[3]) || return 0;
2297 &write_to_http_cache($url, $dest);
2301 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2303 Upload data from a local file to an FTP site. The parameters are :
2305 =item host - FTP server hostname
2307 =item file - File on the FTP server to write to
2309 =item srcfile - File on the Webmin system to upload data from
2311 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2313 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2315 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2317 =item pass - Password for the username above.
2319 =item port - FTP server port number, which defaults to 21 if not set.
2326 if (&is_readonly_mode()) {
2327 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2329 else { &error("FTP connections not allowed in readonly mode"); }
2332 $main::download_timed_out = undef;
2333 local $SIG{ALRM} = \&download_timeout;
2336 # connect to host and login
2337 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2339 if ($main::download_timed_out) {
2340 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2341 else { &error($main::download_timed_out); }
2343 &ftp_command("", 2, $_[3]) || return 0;
2345 # Login as supplied user
2346 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2348 if (int($urv[1]/100) == 3) {
2349 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2353 # Login as anonymous
2354 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2356 if (int($urv[1]/100) == 3) {
2357 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2361 &$cbfunc(1, 0) if ($cbfunc);
2363 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2365 # get the file size and tell the callback
2366 my @st = stat($_[2]);
2368 &$cbfunc(2, $st[7]);
2372 my $pasv = &ftp_command("PASV", 2, $_[3]);
2373 defined($pasv) || return 0;
2374 $pasv =~ /\(([0-9,]+)\)/;
2375 @n = split(/,/ , $1);
2376 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2377 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2382 while(read(PFILE, $buf, 1024) > 0) {
2384 $got += length($buf);
2385 &$cbfunc(3, $got) if ($cbfunc);
2389 if ($got != $st[7]) {
2390 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2391 else { &error("Upload incomplete"); }
2393 &$cbfunc(4) if ($cbfunc);
2396 &ftp_command("", 2, $_[3]) || return 0;
2397 &ftp_command("QUIT", 2, $_[3]) || return 0;
2403 =head2 no_proxy(host)
2405 Checks if some host is on the no proxy list. For internal use by the
2406 http_download and ftp_download functions.
2411 my $ip = &to_ipaddress($_[0]);
2412 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2413 return 1 if ($_[0] =~ /\Q$n\E/ ||
2419 =head2 open_socket(host, port, handle, [&error])
2421 Open a TCP connection to some host and port, using a file handle. The
2424 =item host - Hostname or IP address to connect to.
2426 =item port - TCP port number.
2428 =item handle - A file handle name to use for the connection.
2430 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2435 my ($host, $port, $fh, $err) = @_;
2436 $fh = &callers_package($fh);
2438 if ($gconfig{'debug_what_net'}) {
2439 &webmin_debug_log('TCP', "host=$host port=$port");
2441 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2442 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2443 else { &error("Failed to create socket : $!"); }
2446 if (!($addr = inet_aton($host))) {
2447 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2448 else { &error("Failed to lookup IP address for $host"); }
2450 if ($gconfig{'bind_proxy'}) {
2451 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2452 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2453 else { &error("Failed to bind to source address : $!"); }
2456 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2457 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2458 else { &error("Failed to connect to $host:$port : $!"); }
2460 my $old = select($fh); $| =1; select($old);
2464 =head2 download_timeout
2466 Called when a download times out. For internal use only.
2469 sub download_timeout
2471 $main::download_timed_out = "Download timed out";
2474 =head2 ftp_command(command, expected, [&error], [filehandle])
2476 Send an FTP command, and die if the reply is not what was expected. Mainly
2477 for internal use by the ftp_download and ftp_upload functions.
2482 my ($cmd, $expect, $err, $fh) = @_;
2484 $fh = &callers_package($fh);
2487 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2489 print $fh "$cmd\r\n";
2492 if (!($line = <$fh>)) {
2494 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2495 else { &error("Failed to read reply to $what"); }
2497 $line =~ /^(...)(.)(.*)$/;
2500 foreach my $c (@$expect) {
2501 $found++ if (int($1/100) == $c);
2505 $found++ if (int($1/100) == $_[1]);
2509 if ($err) { $$err = "$what failed : $3"; return undef; }
2510 else { &error("$what failed : $3"); }
2515 # Need to skip extra stuff..
2517 if (!($line = <$fh>)) {
2519 if ($$err) { $$err = "Failed to read reply to $what";
2521 else { &error("Failed to read reply to $what"); }
2523 $line =~ /^(....)(.*)$/; $reply .= $2;
2524 if ($1 eq "$rcode ") { last; }
2528 return wantarray ? ($reply, $rcode) : $reply;
2531 =head2 to_ipaddress(hostname)
2533 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2534 it cannot be resolved.
2539 if (&check_ipaddress($_[0])) {
2543 my $hn = gethostbyname($_[0]);
2544 return undef if (!$hn);
2545 local @ip = unpack("CCCC", $hn);
2546 return join("." , @ip);
2550 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2552 Renders a 4-column table of icons. The useful parameters are :
2554 =item links - An array ref of link destination URLs for the icons.
2556 =item titles - An array ref of titles to appear under the icons.
2558 =item icons - An array ref of URLs for icon images.
2560 =item columns - Number of columns to layout the icons with. Defaults to 4.
2565 &load_theme_library();
2566 if (defined(&theme_icons_table)) {
2567 &theme_icons_table(@_);
2571 my $cols = $_[3] ? $_[3] : 4;
2572 my $per = int(100.0 / $cols);
2573 print "<table class='icons_table' width=100% cellpadding=5>\n";
2574 for(my $i=0; $i<@{$_[0]}; $i++) {
2575 if ($i%$cols == 0) { print "<tr>\n"; }
2576 print "<td width=$per% align=center valign=top>\n";
2577 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2578 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2579 $_[7]->[$i], $_[8]->[$i]);
2581 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2583 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2584 print "</tr>\n" if ($need_tr);
2588 =head2 replace_file_line(file, line, [newline]*)
2590 Replaces one line in some file with 0 or more new lines. The parameters are :
2592 =item file - Full path to some file, like /etc/hosts.
2594 =item line - Line number to replace, starting from 0.
2596 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2599 sub replace_file_line
2602 my $realfile = &translate_filename($_[0]);
2603 open(FILE, $realfile);
2606 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2607 else { splice(@lines, $_[1], 1); }
2608 &open_tempfile(FILE, ">$realfile");
2609 &print_tempfile(FILE, @lines);
2610 &close_tempfile(FILE);
2613 =head2 read_file_lines(file, [readonly])
2615 Returns a reference to an array containing the lines from some file. This
2616 array can be modified, and will be written out when flush_file_lines()
2617 is called. The parameters are :
2619 =item file - Full path to the file to read.
2621 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2625 $lref = read_file_lines("/etc/hosts");
2626 push(@$lref, "127.0.0.1 localhost");
2627 flush_file_lines("/etc/hosts");
2633 my ($package, $filename, $line) = caller;
2634 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2636 my $realfile = &translate_filename($_[0]);
2637 if (!$main::file_cache{$realfile}) {
2640 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2641 open(READFILE, $realfile);
2644 $eol = /\r\n$/ ? "\r\n" : "\n";
2650 $main::file_cache{$realfile} = \@lines;
2651 $main::file_cache_noflush{$realfile} = $_[1];
2652 $main::file_cache_eol{$realfile} = $eol || "\n";
2655 # Make read-write if currently readonly
2657 $main::file_cache_noflush{$realfile} = 0;
2660 return $main::file_cache{$realfile};
2663 =head2 flush_file_lines([file], [eol])
2665 Write out to a file previously read by read_file_lines to disk (except
2666 for those marked readonly). The parameters are :
2668 =item file - The file to flush out.
2670 =item eof - End-of-line character for each line. Defaults to \n.
2673 sub flush_file_lines
2677 local $trans = &translate_filename($_[0]);
2678 $main::file_cache{$trans} ||
2679 &error("flush_file_lines called on non-loaded file $trans");
2680 push(@files, $trans);
2683 @files = ( keys %main::file_cache );
2685 foreach my $f (@files) {
2686 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2687 if (!$main::file_cache_noflush{$f}) {
2688 &open_tempfile(FLUSHFILE, ">$f");
2689 foreach my $line (@{$main::file_cache{$f}}) {
2690 (print FLUSHFILE $line,$eol) ||
2691 &error(&text("efilewrite", $f, $!));
2693 &close_tempfile(FLUSHFILE);
2695 delete($main::file_cache{$f});
2696 delete($main::file_cache_noflush{$f});
2700 =head2 unflush_file_lines(file)
2702 Clear the internal cache of some given file, previously read by read_file_lines.
2705 sub unflush_file_lines
2707 my $realfile = &translate_filename($_[0]);
2708 delete($main::file_cache{$realfile});
2709 delete($main::file_cache_noflush{$realfile});
2712 =head2 unix_user_input(fieldname, user, [form])
2714 Returns HTML for an input to select a Unix user. By default this is a text
2715 box with a user popup button next to it.
2720 if (defined(&theme_unix_user_input)) {
2721 return &theme_unix_user_input(@_);
2723 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2724 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2727 =head2 unix_group_input(fieldname, user, [form])
2729 Returns HTML for an input to select a Unix group. By default this is a text
2730 box with a group popup button next to it.
2733 sub unix_group_input
2735 if (defined(&theme_unix_group_input)) {
2736 return &theme_unix_group_input(@_);
2738 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2739 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2742 =head2 hlink(text, page, [module], [width], [height])
2744 Returns HTML for a link that when clicked on pops up a window for a Webmin
2745 help page. The parameters are :
2747 =item text - Text for the link.
2749 =item page - Help page code, such as 'intro'.
2751 =item module - Module the help page is in. Defaults to the current module.
2753 =item width - Width of the help popup window. Defaults to 600 pixels.
2755 =item height - Height of the help popup window. Defaults to 400 pixels.
2757 The actual help pages are in each module's help sub-directory, in files with
2763 if (defined(&theme_hlink)) {
2764 return &theme_hlink(@_);
2766 my $mod = $_[2] ? $_[2] : &get_module_name();
2767 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2768 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2769 return "<a onClick='window.open(\"$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>";
2772 =head2 user_chooser_button(field, multiple, [form])
2774 Returns HTML for a javascript button for choosing a Unix user or users.
2775 The parameters are :
2777 =item field - Name of the HTML field to place the username into.
2779 =item multiple - Set to 1 if multiple users can be selected.
2781 =item form - Index of the form on the page.
2784 sub user_chooser_button
2786 return undef if (!&supports_users());
2787 return &theme_user_chooser_button(@_)
2788 if (defined(&theme_user_chooser_button));
2789 my $form = defined($_[2]) ? $_[2] : 0;
2790 my $w = $_[1] ? 500 : 300;
2792 if ($_[1] && $gconfig{'db_sizeusers'}) {
2793 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2795 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2796 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2798 return "<input type=button onClick='ifield = form.$_[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";
2801 =head2 group_chooser_button(field, multiple, [form])
2803 Returns HTML for a javascript button for choosing a Unix group or groups
2804 The parameters are :
2806 =item field - Name of the HTML field to place the group name into.
2808 =item multiple - Set to 1 if multiple groups can be selected.
2810 =item form - Index of the form on the page.
2813 sub group_chooser_button
2815 return undef if (!&supports_users());
2816 return &theme_group_chooser_button(@_)
2817 if (defined(&theme_group_chooser_button));
2818 my $form = defined($_[2]) ? $_[2] : 0;
2819 my $w = $_[1] ? 500 : 300;
2821 if ($_[1] && $gconfig{'db_sizeusers'}) {
2822 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2824 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2825 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2827 return "<input type=button onClick='ifield = form.$_[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";
2830 =head2 foreign_check(module, [api-only])
2832 Checks if some other module exists and is supported on this OS. The parameters
2835 =item module - Name of the module to check.
2837 =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.
2842 my ($mod, $api) = @_;
2844 my $mdir = &module_root_directory($mod);
2845 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2846 return &check_os_support(\%minfo, undef, undef, $api);
2849 =head2 foreign_exists(module)
2851 Checks if some other module exists. The module parameter is the short module
2857 my $mdir = &module_root_directory($_[0]);
2858 return -r "$mdir/module.info";
2861 =head2 foreign_available(module)
2863 Returns 1 if some module is installed, and acessible to the current user. The
2864 module parameter is the module directory name.
2867 sub foreign_available
2869 return 0 if (!&foreign_check($_[0]) &&
2870 !$gconfig{'available_even_if_no_support'});
2871 my %foreign_module_info = &get_module_info($_[0]);
2873 # Check list of allowed modules
2875 &read_acl(\%acl, undef);
2876 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2877 !$acl{$base_remote_user,'*'});
2879 # Check for usermod restrictions
2880 my @usermods = &list_usermods();
2881 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2883 if (&get_product_name() eq "webmin") {
2884 # Check if the user has any RBAC privileges in this module
2885 if (&supports_rbac($_[0]) &&
2886 &use_rbac_module_acl(undef, $_[0])) {
2887 # RBAC is enabled for this user and module - check if he
2889 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2890 return 0 if (!$rbacs);
2892 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2893 # If denying access to modules not specifically allowed by
2894 # RBAC, then prevent access
2899 # Check readonly support
2900 if (&is_readonly_mode()) {
2901 return 0 if (!$foreign_module_info{'readonly'});
2904 # Check if theme vetos
2905 if (defined(&theme_foreign_available)) {
2906 return 0 if (!&theme_foreign_available($_[0]));
2909 # Check if licence module vetos
2910 if ($main::licence_module) {
2911 return 0 if (!&foreign_call($main::licence_module,
2912 "check_module_licence", $_[0]));
2918 =head2 foreign_require(module, [file], [package])
2920 Brings in functions from another module, and places them in the Perl namespace
2921 with the same name as the module. The parameters are :
2923 =item module - The source module's directory name, like sendmail.
2925 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2927 =item package - Perl package to place the module's functions and global variables in.
2929 If the original module name contains dashes, they will be replaced with _ in
2935 my ($mod, $file, $pkg) = @_;
2936 $pkg ||= $mod || "global";
2937 $pkg =~ s/[^A-Za-z0-9]/_/g;
2940 push(@files, $file);
2944 my %minfo = &get_module_info($mod);
2945 if ($minfo{'library'}) {
2946 @files = split(/\s+/, $minfo{'library'});
2949 @files = ( $mod."-lib.pl" );
2952 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
2953 return 1 if (!@files);
2954 foreach my $f (@files) {
2955 $main::done_foreign_require{$pkg,$f}++;
2958 my $mdir = &module_root_directory($mod);
2959 @INC = &unique($mdir, @INC);
2960 -d $mdir || &error("Module $mod does not exist");
2961 if (!&get_module_name() && $mod) {
2964 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
2965 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
2966 my $code = "package $pkg; ".
2967 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
2968 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
2969 foreach my $f (@files) {
2970 $code .= "do '$mdir/$f' || die \$@; ";
2973 if (defined($old_fmn)) {
2974 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
2977 delete($ENV{'FOREIGN_MODULE_NAME'});
2979 if (defined($old_frd)) {
2980 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
2983 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
2986 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
2990 =head2 foreign_call(module, function, [arg]*)
2992 Call a function in another module. The module parameter is the target module
2993 directory name, function is the perl sub to call, and the remaining parameters
2994 are the arguments. However, unless you need to call a function whose name
2995 is dynamic, it is better to use Perl's cross-module function call syntax
2996 like module::function(args).
3001 my $pkg = $_[0] || "global";
3002 $pkg =~ s/[^A-Za-z0-9]/_/g;
3003 my @args = @_[2 .. @_-1];
3004 $main::foreign_args = \@args;
3005 my @rv = eval <<EOF;
3007 &$_[1](\@{\$main::foreign_args});
3009 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3010 return wantarray ? @rv : $rv[0];
3013 =head2 foreign_config(module, [user-config])
3015 Get the configuration from another module, and return it as a hash. If the
3016 user-config parameter is set to 1, returns the Usermin user-level preferences
3017 for the current user instead.
3022 my ($mod, $uc) = @_;
3025 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3026 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3027 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3030 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3035 =head2 foreign_installed(module, mode)
3037 Checks if the server for some module is installed, and possibly also checks
3038 if the module has been configured by Webmin.
3039 For mode 1, returns 2 if the server is installed and configured for use by
3040 Webmin, 1 if installed but not configured, or 0 otherwise.
3041 For mode 0, returns 1 if installed, 0 if not.
3042 If the module does not provide an install_check.pl script, assumes that
3043 the server is installed.
3046 sub foreign_installed
3048 my ($mod, $configured) = @_;
3049 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3051 return $main::foreign_installed_cache{$mod,$configured};
3055 if (!&foreign_check($mod)) {
3060 my $mdir = &module_root_directory($mod);
3061 if (!-r "$mdir/install_check.pl") {
3062 # Not known, assume OK
3063 $rv = $configured ? 2 : 1;
3066 # Call function to check
3067 &foreign_require($mod, "install_check.pl");
3068 $rv = &foreign_call($mod, "is_installed", $configured);
3071 $main::foreign_installed_cache{$mod,$configured} = $rv;
3076 =head2 foreign_defined(module, function)
3078 Returns 1 if some function is defined in another module. In general, it is
3079 simpler to use the syntax &defined(module::function) instead.
3085 $pkg =~ s/[^A-Za-z0-9]/_/g;
3086 my $func = "${pkg}::$_[1]";
3087 return defined(&$func);
3090 =head2 get_system_hostname([short])
3092 Returns the hostname of this system. If the short parameter is set to 1,
3093 then the domain name is not prepended - otherwise, Webmin will attempt to get
3094 the fully qualified hostname, like foo.example.com.
3097 sub get_system_hostname
3100 if (!$main::get_system_hostname[$m]) {
3101 if ($gconfig{'os_type'} ne 'windows') {
3102 # Try some common Linux hostname files first
3104 if ($gconfig{'os_type'} eq 'redhat-linux') {
3106 &read_env_file("/etc/sysconfig/network", \%nc);
3107 if ($nc{'HOSTNAME'}) {
3108 $fromfile = $nc{'HOSTNAME'};
3111 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3112 my $hn = &read_file_contents("/etc/hostname");
3118 elsif ($gconfig{'os_type'} eq 'open-linux') {
3119 my $hn = &read_file_contents("/etc/HOSTNAME");
3125 elsif ($gconfig{'os_type'} eq 'solaris') {
3126 my $hn = &read_file_contents("/etc/nodename");
3133 # If we found a hostname, use it if value
3134 if ($fromfile && ($m || $fromfile =~ /\./)) {
3136 $fromfile =~ s/\..*$//;
3138 $main::get_system_hostname[$m] = $fromfile;
3142 # Can use hostname command on Unix
3143 &execute_command("hostname", undef,
3144 \$main::get_system_hostname[$m], undef, 0, 1);
3145 chop($main::get_system_hostname[$m]);
3147 eval "use Sys::Hostname";
3149 $main::get_system_hostname[$m] = eval "hostname()";
3151 if ($@ || !$main::get_system_hostname[$m]) {
3152 $main::get_system_hostname[$m] = "UNKNOWN";
3155 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3156 $gconfig{'os_type'} =~ /linux$/ &&
3157 !$gconfig{'no_hostname_f'} && !$_[0]) {
3158 # Try with -f flag to get fully qualified name
3160 my $ex = &execute_command("hostname -f", undef, \$flag,
3163 if ($ex || $flag eq "") {
3164 # -f not supported! We have probably set the
3165 # hostname to just '-f'. Fix the problem
3168 &execute_command("hostname ".
3169 quotemeta($main::get_system_hostname[$m]),
3170 undef, undef, undef, 0, 1);
3174 $main::get_system_hostname[$m] = $flag;
3179 # On Windows, try computername environment variable
3180 return $ENV{'computername'} if ($ENV{'computername'});
3181 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3183 # Fall back to net name command
3184 my $out = `net name 2>&1`;
3185 if ($out =~ /\-+\r?\n(\S+)/) {
3186 $main::get_system_hostname[$m] = $1;
3189 $main::get_system_hostname[$m] = "windows";
3193 return $main::get_system_hostname[$m];
3196 =head2 get_webmin_version
3198 Returns the version of Webmin currently being run, such as 1.450.
3201 sub get_webmin_version
3203 if (!$get_webmin_version) {
3204 open(VERSION, "$root_directory/version") || return 0;
3205 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3208 return $get_webmin_version;
3211 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3213 Returns a hash containing access control options for the given user and module.
3214 By default the current username and module name are used. If the no-rbac flag
3215 is given, the permissions will not be updated based on the user's RBAC role
3216 (as seen on Solaris). If the no-default flag is given, default permissions for
3217 the module will not be included.
3222 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3223 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3224 my $mdir = &module_root_directory($m);
3227 # Read default ACL first, to be overridden by per-user settings
3228 &read_file_cached("$mdir/defaultacl", \%rv);
3230 # If this isn't a master admin user, apply the negative permissions
3231 # so that he doesn't un-expectedly gain access to new features
3233 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3234 if ($gaccess{'negative'}) {
3235 &read_file_cached("$mdir/negativeacl", \%rv);
3239 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3240 # RBAC overrides exist for this user in this module
3241 my $rbac = &get_rbac_module_acl(
3242 defined($_[0]) ? $_[0] : $remote_user, $m);
3243 foreach my $r (keys %$rbac) {
3244 $rv{$r} = $rbac->{$r};
3247 elsif ($gconfig{"risk_$u"} && $m) {
3248 # ACL is defined by user's risk level
3249 my $rf = $gconfig{"risk_$u"}.'.risk';
3250 &read_file_cached("$mdir/$rf", \%rv);
3252 my $sf = $gconfig{"skill_$u"}.'.skill';
3253 &read_file_cached("$mdir/$sf", \%rv);
3256 # Use normal Webmin ACL, if a user is set
3257 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3258 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3259 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3262 if ($tconfig{'preload_functions'}) {
3263 &load_theme_library();
3265 if (defined(&theme_get_module_acl)) {
3266 %rv = &theme_get_module_acl($u, $m, \%rv);
3271 =head2 get_group_module_acl(group, [module])
3273 Returns the ACL for a Webmin group, in an optional module (which defaults to
3274 the current module).
3277 sub get_group_module_acl
3280 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3281 my $mdir = &module_root_directory($m);
3283 &read_file_cached("$mdir/defaultacl", \%rv);
3284 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3285 if (defined(&theme_get_module_acl)) {
3286 %rv = &theme_get_module_acl($g, $m, \%rv);
3291 =head2 save_module_acl(&acl, [user], [module])
3293 Updates the acl hash for some user and module. The parameters are :
3295 =item acl - Hash reference for the new access control options.
3297 =item user - User to update, defaulting to the current user.
3299 =item module - Module to update, defaulting to the caller.
3304 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3305 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3306 if (&foreign_check("acl")) {
3307 # Check if this user is a member of a group, and if he gets the
3308 # module from a group. If so, update its ACL as well
3309 &foreign_require("acl", "acl-lib.pl");
3311 foreach my $g (&acl::list_groups()) {
3312 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3313 &indexof($m, @{$g->{'modules'}}) >= 0) {
3319 &save_group_module_acl($_[0], $group->{'name'}, $m);
3322 if (!-d "$config_directory/$m") {
3323 mkdir("$config_directory/$m", 0755);
3325 &write_file("$config_directory/$m/$u.acl", $_[0]);
3328 =head2 save_group_module_acl(&acl, group, [module])
3330 Updates the acl hash for some group and module. The parameters are :
3332 =item acl - Hash reference for the new access control options.
3334 =item group - Group name to update.
3336 =item module - Module to update, defaulting to the caller.
3339 sub save_group_module_acl
3342 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3343 if (&foreign_check("acl")) {
3344 # Check if this group is a member of a group, and if it gets the
3345 # module from a group. If so, update the parent ACL as well
3346 &foreign_require("acl", "acl-lib.pl");
3348 foreach my $pg (&acl::list_groups()) {
3349 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3350 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3356 &save_group_module_acl($_[0], $group->{'name'}, $m);
3359 if (!-d "$config_directory/$m") {
3360 mkdir("$config_directory/$m", 0755);
3362 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3367 This function must be called by all Webmin CGI scripts, either directly or
3368 indirectly via a per-module lib.pl file. It performs a number of initialization
3369 and housekeeping tasks, such as working out the module name, checking that the
3370 current user has access to the module, and populating global variables. Some
3371 of the variables set include :
3373 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3375 =item $var_directory - Base logs directory, typically /var/webmin
3377 =item %config - Per-module configuration.
3379 =item %gconfig - Global configuration.
3381 =item $scriptname - Base name of the current perl script.
3383 =item $module_name - The name of the current module.
3385 =item $module_config_directory - The config directory for this module.
3387 =item $module_config_file - The config file for this module.
3389 =item $module_root_directory - This module's code directory.
3391 =item $webmin_logfile - The detailed logfile for webmin.
3393 =item $remote_user - The actual username used to login to webmin.
3395 =item $base_remote_user - The username whose permissions are in effect.
3397 =item $current_theme - The theme currently in use.
3399 =item $root_directory - The first root directory of this webmin install.
3401 =item @root_directories - All root directories for this webmin install.
3406 # Record first process ID that called this, so we know when it exited to clean
3408 $main::initial_process_id ||= $$;
3410 # Configuration and spool directories
3411 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3412 die "WEBMIN_CONFIG not set";
3414 $config_directory = $ENV{'WEBMIN_CONFIG'};
3415 if (!defined($ENV{'WEBMIN_VAR'})) {
3416 open(VARPATH, "$config_directory/var-path");
3417 chop($var_directory = <VARPATH>);
3421 $var_directory = $ENV{'WEBMIN_VAR'};
3423 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3424 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3426 if ($ENV{'SESSION_ID'}) {
3427 # Hide this variable from called programs, but keep it for internal use
3428 $main::session_id = $ENV{'SESSION_ID'};
3429 delete($ENV{'SESSION_ID'});
3431 if ($ENV{'REMOTE_PASS'}) {
3432 # Hide the password too
3433 $main::remote_pass = $ENV{'REMOTE_PASS'};
3434 delete($ENV{'REMOTE_PASS'});
3437 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3438 # Looks like we are running setuid, but the real UID hasn't been set.
3439 # Do so now, so that executed programs don't get confused
3444 # Read the webmin global config file. This contains the OS type and version,
3445 # OS specific configuration and global options such as proxy servers
3446 $config_file = "$config_directory/config";
3448 &read_file_cached($config_file, \%gconfig);
3449 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3450 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3452 # If debugging is enabled, open the debug log
3453 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3454 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3455 if ($gconfig{'debug_size'}) {
3456 my @st = stat($dlog);
3457 if ($st[7] > $gconfig{'debug_size'}) {
3458 rename($dlog, $dlog.".0");
3461 open(main::DEBUGLOG, ">>$dlog");
3462 $main::opened_debug_log = 1;
3464 if ($gconfig{'debug_what_start'}) {
3465 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3466 $main::debug_log_start_time = time();
3467 &webmin_debug_log("START", "script=$script_name");
3468 $main::debug_log_start_module = $module_name;
3472 # Set PATH and LD_LIBRARY_PATH
3473 if ($gconfig{'path'}) {
3474 if ($gconfig{'syspath'}) {
3476 $ENV{'PATH'} = $gconfig{'path'};
3480 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3483 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3485 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3486 if ($gconfig{'http_proxy'}) {
3487 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3489 if ($gconfig{'ftp_proxy'}) {
3490 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3492 if ($gconfig{'noproxy'}) {
3493 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3496 # Find all root directories
3498 if (&get_miniserv_config(\%miniserv)) {
3499 @root_directories = ( $miniserv{'root'} );
3500 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3501 push(@root_directories, $miniserv{"extraroot_$i"});
3505 # Work out which module we are in, and read the per-module config file
3506 $0 =~ s/\\/\//g; # Force consistent path on Windows
3507 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3508 # In a foreign call - use the module name given
3509 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3510 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3511 @root_directories = ( $root_directory ) if (!@root_directories);
3513 elsif ($ENV{'SCRIPT_NAME'}) {
3514 my $sn = $ENV{'SCRIPT_NAME'};
3515 $sn =~ s/^$gconfig{'webprefix'}//
3516 if (!$gconfig{'webprefixnoredir'});
3517 if ($sn =~ /^\/([^\/]+)\//) {
3518 # Get module name from CGI path
3521 if ($ENV{'SERVER_ROOT'}) {
3522 $root_directory = $ENV{'SERVER_ROOT'};
3524 elsif ($ENV{'SCRIPT_FILENAME'}) {
3525 $root_directory = $ENV{'SCRIPT_FILENAME'};
3526 $root_directory =~ s/$sn$//;
3528 @root_directories = ( $root_directory ) if (!@root_directories);
3531 # Get root directory from miniserv.conf, and deduce module name from $0
3532 $root_directory = $root_directories[0];
3534 foreach my $r (@root_directories) {
3535 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3536 # Under a module directory
3541 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3547 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3550 # Work out of this is a web, command line or cron job
3551 if (!$main::webmin_script_type) {
3552 if ($ENV{'SCRIPT_NAME'}) {
3554 $main::webmin_script_type = 'web';
3557 # Cron jobs have no TTY
3558 if ($gconfig{'os_type'} eq 'windows' ||
3559 open(DEVTTY, ">/dev/tty")) {
3560 $main::webmin_script_type = 'cmd';
3564 $main::webmin_script_type = 'cron';
3569 # Set the umask based on config
3570 if ($gconfig{'umask'} && !$main::umask_already++) {
3571 umask(oct($gconfig{'umask'}));
3574 # If this is a cron job or other background task, set the nice level
3575 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3577 if ($gconfig{'nice'}) {
3578 eval 'POSIX::nice($gconfig{\'nice\'});';
3581 # Set IO scheduling class and priority
3582 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3584 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3585 if ($gconfig{'sclass'} ne '');
3586 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3587 if ($gconfig{'sprio'} ne '');
3589 &execute_command("$cmd >/dev/null 2>&1");
3592 $main::nice_already++;
3595 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3596 $base_remote_user = $u;
3597 $remote_user = $ENV{'REMOTE_USER'};
3600 # Find and load the configuration file for this module
3601 my (@ruinfo, $rgroup);
3602 $module_config_directory = "$config_directory/$module_name";
3603 if (&get_product_name() eq "usermin" &&
3604 -r "$module_config_directory/config.$remote_user") {
3606 $module_config_file = "$module_config_directory/config.$remote_user";
3608 elsif (&get_product_name() eq "usermin" &&
3609 (@ruinfo = getpwnam($remote_user)) &&
3610 ($rgroup = getgrgid($ruinfo[3])) &&
3611 -r "$module_config_directory/config.\@$rgroup") {
3612 # Based on group name
3613 $module_config_file = "$module_config_directory/config.\@$rgroup";
3617 $module_config_file = "$module_config_directory/config";
3620 &read_file_cached($module_config_file, \%config);
3622 # Fix up windows-specific substitutions in values
3623 foreach my $k (keys %config) {
3624 if ($config{$k} =~ /\$\{systemroot\}/) {
3625 my $root = &get_windows_root();
3626 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3631 # Record the initial module
3632 $main::initial_module_name ||= $module_name;
3634 # Set some useful variables
3636 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3637 $gconfig{'mobile_theme'} :
3638 defined($gconfig{'theme_'.$remote_user}) ?
3639 $gconfig{'theme_'.$remote_user} :
3640 defined($gconfig{'theme_'.$base_remote_user}) ?
3641 $gconfig{'theme_'.$base_remote_user} :
3643 @current_themes = split(/\s+/, $current_themes);
3644 $current_theme = $current_themes[0];
3645 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3646 $theme_root_directory = $theme_root_directories[0];
3647 @theme_configs = ( );
3648 foreach my $troot (@theme_root_directories) {
3650 &read_file_cached("$troot/config", \%onetconfig);
3651 &read_file_cached("$troot/config", \%tconfig);
3652 push(@theme_configs, \%onetconfig);
3654 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3655 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3657 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3658 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3660 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3661 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3662 if ($tconfig{'preload_functions'}) {
3663 # Force load of theme functions right now, if requested
3664 &load_theme_library();
3666 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3667 # Load the theme's Webmin:: package classes
3668 do "$theme_root_directory/$tconfig{'oofunctions'}";
3673 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3674 : "$var_directory/webmin.log";
3676 # Load language strings into %text
3677 my @langs = &list_languages();
3679 if ($gconfig{'acceptlang'}) {
3680 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3681 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3683 $accepted_lang = $al->{'lang'};
3688 $current_lang = $force_lang ? $force_lang :
3689 $accepted_lang ? $accepted_lang :
3690 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3691 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3692 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3693 foreach my $l (@langs) {
3694 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3696 @lang_order_list = &unique($default_lang,
3697 split(/:/, $current_lang_info->{'fallback'}),
3699 %text = &load_language($module_name);
3700 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3702 # Get the %module_info for this module
3704 my ($mi) = grep { $_->{'dir'} eq $module_name }
3705 &get_all_module_infos(2);
3706 %module_info = %$mi;
3707 $module_root_directory = &module_root_directory($module_name);
3710 if ($module_name && !$main::no_acl_check &&
3711 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3712 # Check if the HTTP user can access this module
3713 if (!&foreign_available($module_name)) {
3714 if (!&foreign_check($module_name)) {
3715 &error(&text('emodulecheck',
3716 "<i>$module_info{'desc'}</i>"));
3719 &error(&text('emodule', "<i>$u</i>",
3720 "<i>$module_info{'desc'}</i>"));
3723 $main::no_acl_check++;
3726 # Check the Referer: header for nasty redirects
3727 my @referers = split(/\s+/, $gconfig{'referers'});
3729 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3732 my $http_host = $ENV{'HTTP_HOST'};
3733 $http_host =~ s/:\d+$//;
3735 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index_cgi) &&
3736 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3737 $unsafe_index_cgi) &&
3738 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3739 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3740 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3741 ($referer_site && $referer_site ne $http_host &&
3742 &indexof($referer_site, @referers) < 0 ||
3743 !$referer_site && $gconfig{'referers_none'}) &&
3744 !$trust_unknown_referers &&
3745 !&get_module_variable('$trust_unknown_referers')) {
3746 # Looks like a link from elsewhere .. show an error
3747 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3749 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3750 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3751 if ($referer_site) {
3753 print &text('referer_warn',
3754 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3756 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3757 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3760 # No referer info given
3761 print &text('referer_warn_unknown', $url),"<p>\n";
3762 print &text('referer_fix1u'),"<p>\n";
3763 print &text('referer_fix2u'),"<p>\n";
3767 &footer("/", $text{'index'});
3770 $main::no_referers_check++;
3771 $main::completed_referers_check++;
3773 # Call theme post-init
3774 if (defined(&theme_post_init_config)) {
3775 &theme_post_init_config(@_);
3778 # Record that we have done the calling library in this package
3779 my ($callpkg, $lib) = caller();
3781 $main::done_foreign_require{$callpkg,$lib} = 1;
3783 # If a licence checking is enabled, do it now
3784 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3785 &foreign_check($gconfig{'licence_module'}) &&
3786 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3787 my $oldpwd = &get_current_dir();
3788 $main::done_licence_module_check++;
3789 $main::licence_module = $gconfig{'licence_module'};
3790 &foreign_require($main::licence_module, "licence_check.pl");
3791 ($main::licence_status, $main::licence_message) =
3792 &foreign_call($main::licence_module, "check_licence");
3796 # Export global variables to caller
3797 if ($main::export_to_caller) {
3798 foreach my $v ('$config_file', '%gconfig', '$null_file',
3799 '$path_separator', '@root_directories',
3800 '$root_directory', '$module_name',
3801 '$base_remote_user', '$remote_user',
3802 '$module_config_directory', '$module_config_file',
3803 '%config', '@current_themes', '$current_theme',
3804 '@theme_root_directories', '$theme_root_directory',
3805 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3806 '$webmin_logfile', '$current_lang',
3807 '$current_lang_info', '@lang_order_list', '%text',
3808 '%module_info', '$module_root_directory') {
3809 my ($vt, $vn) = split('', $v, 2);
3810 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3817 =head2 load_language([module], [directory])
3819 Returns a hashtable mapping text codes to strings in the appropriate language,
3820 based on the $current_lang global variable, which is in turn set based on
3821 the Webmin user's selection. The optional module parameter tells the function
3822 which module to load strings for, and defaults to the calling module. The
3823 optional directory parameter can be used to load strings from a directory
3826 In regular module development you will never need to call this function
3827 directly, as init_config calls it for you, and places the module's strings
3828 into the %text hash.
3834 my $root = $root_directory;
3835 my $ol = $gconfig{'overlang'};
3836 my ($dir) = ($_[1] || "lang");
3838 # Read global lang files
3839 foreach my $o (@lang_order_list) {
3840 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3841 return () if (!$ok && $o eq $default_lang);
3844 foreach my $o (@lang_order_list) {
3845 &read_file_cached("$root/$ol/$o", \%text);
3848 &read_file_cached("$config_directory/custom-lang", \%text);
3851 # Read module's lang files
3852 my $mdir = &module_root_directory($_[0]);
3853 foreach my $o (@lang_order_list) {
3854 &read_file_cached("$mdir/$dir/$o", \%text);
3857 foreach $o (@lang_order_list) {
3858 &read_file_cached("$mdir/$ol/$o", \%text);
3861 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3863 foreach $k (keys %text) {
3864 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3867 if (defined(&theme_load_language)) {
3868 &theme_load_language(\%text, $_[0]);
3873 =head2 text_subs(string)
3875 Used internally by load_language to expand $code substitutions in language
3881 if (substr($_[0], 0, 8) eq "include:") {
3884 open(INCLUDE, substr($_[0], 8));
3892 my $t = $_[1]->{$_[0]};
3893 return defined($t) ? $t : '$'.$_[0];
3897 =head2 text(message, [substitute]+)
3899 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3900 the substitute parameters. This makes it easy to use strings with placeholders
3901 that get replaced with programmatically generated text. For example :
3903 print &text('index_hello', $remote_user),"<p>\n";
3908 my $t = &get_module_variable('%text', 1);
3909 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3910 for(my $i=1; $i<@_; $i++) {
3911 $rv =~ s/\$$i/$_[$i]/g;
3916 =head2 encode_base64(string)
3918 Encodes a string into base64 format, for use in MIME email or HTTP
3919 authorization headers.
3925 pos($_[0]) = 0; # ensure start at the beginning
3926 while ($_[0] =~ /(.{1,57})/gs) {
3927 $res .= substr(pack('u57', $1), 1)."\n";
3930 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3931 my $padding = (3 - length($_[0]) % 3) % 3;
3932 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3936 =head2 decode_base64(string)
3938 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3945 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3946 if (length($str) % 4) {
3949 $str =~ s/=+$//; # remove padding
3950 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3951 while ($str =~ /(.{1,60})/gs) {
3952 my $len = chr(32 + length($1)*3/4); # compute length byte
3953 $res .= unpack("u", $len . $1 ); # uudecode
3958 =head2 get_module_info(module, [noclone], [forcache])
3960 Returns a hash containg details of the given module. Some useful keys are :
3962 =item dir - The module directory, like sendmail.
3964 =item desc - Human-readable description, in the current users' language.
3966 =item version - Optional module version number.
3968 =item os_support - List of supported operating systems and versions.
3970 =item category - Category on Webmin's left menu, like net.
3975 return () if ($_[0] =~ /^\./);
3976 my (%rv, $clone, $o);
3977 my $mdir = &module_root_directory($_[0]);
3978 &read_file_cached("$mdir/module.info", \%rv) || return ();
3980 foreach $o (@lang_order_list) {
3981 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
3982 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
3984 if ($clone && !$_[1] && $config_directory) {
3985 $rv{'clone'} = $rv{'desc'};
3986 &read_file("$config_directory/$_[0]/clone", \%rv);
3989 my %module_categories;
3990 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
3991 my $pn = &get_product_name();
3992 if (defined($rv{'category_'.$pn})) {
3993 # Can override category for webmin/usermin
3994 $rv{'category'} = $rv{'category_'.$pn};
3996 $rv{'realcategory'} = $rv{'category'};
3997 $rv{'category'} = $module_categories{$_[0]}
3998 if (defined($module_categories{$_[0]}));
4000 # Apply description overrides
4001 $rv{'realdesc'} = $rv{'desc'};
4003 &read_file_cached("$config_directory/webmin.descs", \%descs);
4004 if ($descs{$_[0]." ".$current_lang}) {
4005 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4007 elsif ($descs{$_[0]}) {
4008 $rv{'desc'} = $descs{$_[0]};
4012 # Apply per-user description overridde
4013 my %gaccess = &get_module_acl(undef, "");
4014 if ($gaccess{'desc_'.$_[0]}) {
4015 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4019 if ($rv{'longdesc'}) {
4020 # All standard modules have an index.cgi
4021 $rv{'index_link'} = 'index.cgi';
4024 # Call theme-specific override function
4025 if (defined(&theme_get_module_info)) {
4026 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4032 =head2 get_all_module_infos(cachemode)
4034 Returns a list contains the information on all modules in this webmin
4035 install, including clones. Uses caching to reduce the number of module.info
4036 files that need to be read. Each element of the array is a hash reference
4037 in the same format as returned by get_module_info. The cache mode flag can be :
4038 0 = read and write, 1 = don't read or write, 2 = read only
4041 sub get_all_module_infos
4045 # Is the cache out of date? (ie. have any of the root's changed?)
4046 my $cache_file = "$config_directory/module.infos.cache";
4048 if (&read_file_cached($cache_file, \%cache)) {
4049 foreach my $r (@root_directories) {
4051 if ($st[9] != $cache{'mtime_'.$r}) {
4061 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4062 # Can use existing module.info cache
4064 foreach my $k (keys %cache) {
4065 if ($k =~ /^(\S+) (\S+)$/) {
4066 $mods{$1}->{$2} = $cache{$k};
4069 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4072 # Need to rebuild cache
4074 foreach my $r (@root_directories) {
4076 foreach my $m (readdir(DIR)) {
4077 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4078 my %minfo = &get_module_info($m, 0, 1);
4079 next if (!%minfo || !$minfo{'dir'});
4081 foreach $k (keys %minfo) {
4082 $cache{"${m} ${k}"} = $minfo{$k};
4087 $cache{'mtime_'.$r} = $st[9];
4089 $cache{'lang'} = $current_lang;
4090 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4093 # Override descriptions for modules for current user
4094 my %gaccess = &get_module_acl(undef, "");
4095 foreach my $m (@rv) {
4096 if ($gaccess{"desc_".$m->{'dir'}}) {
4097 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4101 # Apply installed flags
4103 &read_file_cached("$config_directory/installed.cache", \%installed);
4104 foreach my $m (@rv) {
4105 $m->{'installed'} = $installed{$m->{'dir'}};
4111 =head2 get_theme_info(theme)
4113 Returns a hash containing a theme's details, taken from it's theme.info file.
4114 Some useful keys are :
4116 =item dir - The theme directory, like blue-theme.
4118 =item desc - Human-readable description, in the current users' language.
4120 =item version - Optional module version number.
4122 =item os_support - List of supported operating systems and versions.
4127 return () if ($_[0] =~ /^\./);
4129 my $tdir = &module_root_directory($_[0]);
4130 &read_file("$tdir/theme.info", \%rv) || return ();
4131 foreach my $o (@lang_order_list) {
4132 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4138 =head2 list_languages
4140 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4141 Each is a hash reference with the following keys :
4143 =item lang - The short language code, like es for Spanish.
4145 =item desc - A human-readable description, in English.
4147 =item charset - An optional character set to use when displaying the language.
4149 =item titles - Set to 1 only if Webmin has title images for the language.
4151 =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.
4156 if (!@main::list_languages_cache) {
4159 open(LANG, "$root_directory/lang_list.txt");
4161 if (/^(\S+)\s+(.*)/) {
4162 my $l = { 'desc' => $2 };
4163 foreach $o (split(/,/, $1)) {
4164 if ($o =~ /^([^=]+)=(.*)$/) {
4168 $l->{'index'} = scalar(@rv);
4169 push(@main::list_languages_cache, $l);
4173 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4174 @main::list_languages_cache;
4176 return @main::list_languages_cache;
4179 =head2 read_env_file(file, &hash)
4181 Similar to Webmin's read_file function, but handles files containing shell
4182 environment variables formatted like :
4187 The file parameter is the full path to the file to read, and hash a Perl hash
4188 ref to read names and values into.
4194 &open_readfile(FILE, $_[0]) || return 0;
4197 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4198 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4199 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4207 =head2 write_env_file(file, &hash, [export])
4209 Writes out a hash to a file in name='value' format, suitable for use in a shell
4210 script. The parameters are :
4212 =item file - Full path for a file to write to
4214 =item hash - Hash reference of names and values to write.
4216 =item export - If set to 1, preceed each variable setting with the word 'export'.
4221 my $exp = $_[2] ? "export " : "";
4222 &open_tempfile(FILE, ">$_[0]");
4223 foreach my $k (keys %{$_[1]}) {
4224 my $v = $_[1]->{$k};
4225 if ($v =~ /^\S+$/) {
4226 &print_tempfile(FILE, "$exp$k=$v\n");
4229 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4232 &close_tempfile(FILE);
4235 =head2 lock_file(filename, [readonly], [forcefile])
4237 Lock a file for exclusive access. If the file is already locked, spin
4238 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4239 to work OK. The parameters are :
4241 =item filename - File or directory to lock.
4243 =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.
4245 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4250 my $realfile = &translate_filename($_[0]);
4251 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4252 my $no_lock = !&can_lock_file($realfile);
4253 my $lock_tries_count = 0;
4256 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4261 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4264 # Create the .lock file
4265 open(LOCKING, ">$realfile.lock") || return 0;
4266 my $lck = eval "flock(LOCKING, 2+4)";
4268 # Lock of lock file failed! Wait till later
4271 print LOCKING $$,"\n";
4272 eval "flock(LOCKING, 8)";
4275 $main::locked_file_list{$realfile} = int($_[1]);
4276 push(@main::temporary_files, "$realfile.lock");
4277 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4278 !&get_module_variable('$no_log_file_changes') &&
4280 # Grab a copy of this file for later diffing
4282 $main::locked_file_data{$realfile} = undef;
4284 $main::locked_file_type{$realfile} = 1;
4285 $main::locked_file_data{$realfile} = '';
4287 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4288 $main::locked_file_type{$realfile} = 2;
4289 $main::locked_file_data{$realfile} = $lnk;
4291 elsif (open(ORIGFILE, $realfile)) {
4292 $main::locked_file_type{$realfile} = 0;
4293 $main::locked_file_data{$realfile} = '';
4296 $main::locked_file_data{$realfile} .=$_;
4305 if ($lock_tries_count++ > 5*60) {
4306 # Give up after 5 minutes
4307 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4313 =head2 unlock_file(filename)
4315 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4316 file changes is enabled, then at unlock file a diff will be taken between the
4317 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4318 called. This can then be viewed in the Webmin Actions Log module.
4323 my $realfile = &translate_filename($_[0]);
4324 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4325 unlink("$realfile.lock") if (&can_lock_file($realfile));
4326 delete($main::locked_file_list{$realfile});
4327 if (exists($main::locked_file_data{$realfile})) {
4328 # Diff the new file with the old
4330 my $lnk = readlink($realfile);
4331 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4332 my $oldtype = $main::locked_file_type{$realfile};
4333 my $new = !defined($main::locked_file_data{$realfile});
4334 if ($new && !-e _) {
4335 # file doesn't exist, and never did! do nothing ..
4337 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4338 # is (or was) a directory ..
4339 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4340 push(@main::locked_file_diff,
4341 { 'type' => 'mkdir', 'object' => $realfile });
4343 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4344 push(@main::locked_file_diff,
4345 { 'type' => 'rmdir', 'object' => $realfile });
4348 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4349 # is (or was) a symlink ..
4350 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4351 push(@main::locked_file_diff,
4352 { 'type' => 'symlink', 'object' => $realfile,
4355 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4356 push(@main::locked_file_diff,
4357 { 'type' => 'unsymlink', 'object' => $realfile,
4358 'data' => $main::locked_file_data{$realfile} });
4360 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4361 push(@main::locked_file_diff,
4362 { 'type' => 'resymlink', 'object' => $realfile,
4367 # is a file, or has changed type?!
4368 my ($diff, $delete_file);
4369 my $type = "modify";
4371 open(NEWFILE, ">$realfile");
4376 if (!defined($main::locked_file_data{$realfile})) {
4379 open(ORIGFILE, ">$realfile.webminorig");
4380 print ORIGFILE $main::locked_file_data{$realfile};
4382 $diff = &backquote_command(
4383 "diff ".quotemeta("$realfile.webminorig")." ".
4384 quotemeta($realfile)." 2>/dev/null");
4385 push(@main::locked_file_diff,
4386 { 'type' => $type, 'object' => $realfile,
4387 'data' => $diff } ) if ($diff);
4388 unlink("$realfile.webminorig");
4389 unlink($realfile) if ($delete_file);
4392 if ($gconfig{'logfullfiles'}) {
4393 # Add file details to list of those to fully log
4394 $main::orig_file_data{$realfile} ||=
4395 $main::locked_file_data{$realfile};
4396 $main::orig_file_type{$realfile} ||=
4397 $main::locked_file_type{$realfile};
4400 delete($main::locked_file_data{$realfile});
4401 delete($main::locked_file_type{$realfile});
4405 =head2 test_lock(file)
4407 Returns 1 if some file is currently locked, 0 if not.
4412 my $realfile = &translate_filename($_[0]);
4413 return 0 if (!$_[0]);
4414 return 1 if (defined($main::locked_file_list{$realfile}));
4415 return 0 if (!&can_lock_file($realfile));
4417 if (open(LOCKING, "$realfile.lock")) {
4422 return $pid && kill(0, $pid);
4425 =head2 unlock_all_files
4427 Unlocks all files locked by the current script.
4430 sub unlock_all_files
4432 foreach $f (keys %main::locked_file_list) {
4437 =head2 can_lock_file(file)
4439 Returns 1 if some file should be locked, based on the settings in the
4440 Webmin Configuration module. For internal use by lock_file only.
4445 if (&is_readonly_mode()) {
4446 return 0; # never lock in read-only mode
4448 elsif ($gconfig{'lockmode'} == 0) {
4451 elsif ($gconfig{'lockmode'} == 1) {
4455 # Check if under any of the directories
4457 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4458 if (&same_file($d, $_[0]) ||
4459 &is_under_directory($d, $_[0])) {
4463 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4467 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4469 Log some action taken by a user. This is typically called at the end of a
4470 script, once all file changes are complete and all commands run. The
4473 =item action - A short code for the action being performed, like 'create'.
4475 =item type - A code for the type of object the action is performed to, like 'user'.
4477 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4479 =item params - A hash ref of additional information about the action.
4481 =item module - Name of the module in which the action was performed, which defaults to the current module.
4483 =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.
4485 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4487 =item client-ip - IP address of the browser that performed the action.
4492 return if (!$gconfig{'log'} || &is_readonly_mode());
4493 my $m = $_[4] ? $_[4] : &get_module_name();
4495 if ($gconfig{'logclear'}) {
4496 # check if it is time to clear the log
4497 my @st = stat("$webmin_logfile.time");
4498 my $write_logtime = 0;
4500 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4501 # clear logfile and all diff files
4502 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4503 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4504 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4505 unlink($webmin_logfile);
4512 if ($write_logtime) {
4513 open(LOGTIME, ">$webmin_logfile.time");
4514 print LOGTIME time(),"\n";
4519 # If an action script directory is defined, call the appropriate scripts
4520 if ($gconfig{'action_script_dir'}) {
4521 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4522 my ($basedir) = $gconfig{'action_script_dir'};
4524 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4527 opendir(DIR, $dir) or die "Can't open $dir: $!";
4528 while (defined($file = readdir(DIR))) {
4529 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4530 if (-x "$dir/$file") {
4531 # Call a script notifying it of the action
4533 $ENV{'ACTION_MODULE'} = &get_module_name();
4534 $ENV{'ACTION_ACTION'} = $_[0];
4535 $ENV{'ACTION_TYPE'} = $_[1];
4536 $ENV{'ACTION_OBJECT'} = $_[2];
4537 $ENV{'ACTION_SCRIPT'} = $script_name;
4538 foreach my $p (keys %param) {
4539 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4541 system("$dir/$file", @_,
4542 "<$null_file", ">$null_file", "2>&1");
4550 # should logging be done at all?
4551 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4552 split(/\s+/, $gconfig{'logusers'})) < 0);
4553 return if ($gconfig{'logmodules'} && &indexof($m,
4554 split(/\s+/, $gconfig{'logmodules'})) < 0);
4558 my @tm = localtime($now);
4559 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4560 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4561 $main::action_id_count++;
4562 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4563 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4564 $tm[2], $tm[1], $tm[0],
4565 $remote_user || '-',
4566 $main::session_id || '-',
4567 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4568 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4569 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4571 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4572 my $v = $_[3]->{$k};
4578 elsif (ref($v) eq 'ARRAY') {
4582 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4583 $line .= " $k='$vv'";
4587 foreach $vv (split(/\0/, $v)) {
4589 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4590 $line .= " $k='$vv'";
4593 $param{$k} = join(" ", @pv);
4595 open(WEBMINLOG, ">>$webmin_logfile");
4596 print WEBMINLOG $line,"\n";
4598 if ($gconfig{'logperms'}) {
4599 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4602 chmod(0600, $webmin_logfile);
4605 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4606 # Find and record the changes made to any locked files, or commands run
4608 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4609 foreach my $d (@main::locked_file_diff) {
4610 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4611 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4612 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4613 print DIFFLOG $d->{'data'};
4615 if ($d->{'input'}) {
4616 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4617 print DIFFLOG $d->{'input'};
4620 if ($gconfig{'logperms'}) {
4621 chmod(oct($gconfig{'logperms'}),
4622 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4623 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4627 @main::locked_file_diff = undef;
4629 if ($gconfig{'logfullfiles'}) {
4630 # Save the original contents of any modified files
4632 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4633 foreach my $f (keys %main::orig_file_data) {
4634 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4635 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4636 if (!defined($main::orig_file_type{$f})) {
4637 print ORIGLOG -1," ",$f,"\n";
4640 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4642 print ORIGLOG $main::orig_file_data{$f};
4644 if ($gconfig{'logperms'}) {
4645 chmod(oct($gconfig{'logperms'}),
4646 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4650 %main::orig_file_data = undef;
4651 %main::orig_file_type = undef;
4655 if ($gconfig{'logsyslog'}) {
4656 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4657 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4658 setlogsock("inet");';
4660 # Syslog module is installed .. try to convert to a
4661 # human-readable form
4663 my $mod = &get_module_name();
4664 my $mdir = module_root_directory($mod);
4665 if (-r "$mdir/log_parser.pl") {
4666 &foreign_require($mod, "log_parser.pl");
4668 foreach my $k (keys %{$_[3]}) {
4669 my $v = $_[3]->{$k};
4670 if (ref($v) eq 'ARRAY') {
4671 $params{$k} = join("\0", @$v);
4677 $msg = &foreign_call($mod, "parse_webmin_log",
4678 $remote_user, $script_name,
4679 $_[0], $_[1], $_[2], \%params);
4680 $msg =~ s/<[^>]*>//g; # Remove tags
4682 elsif ($_[0] eq "_config_") {
4683 my %wtext = &load_language("webminlog");
4684 $msg = $wtext{'search_config'};
4686 $msg ||= "$_[0] $_[1] $_[2]";
4687 my %info = &get_module_info($m);
4688 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4693 =head2 additional_log(type, object, data, [input])
4695 Records additional log data for an upcoming call to webmin_log, such
4696 as a command that was run or SQL that was executed. Typically you will never
4697 need to call this function directory.
4702 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4703 push(@main::locked_file_diff,
4704 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4705 'input' => $_[3] } );
4709 =head2 webmin_debug_log(type, message)
4711 Write something to the Webmin debug log. For internal use only.
4714 sub webmin_debug_log
4716 my ($type, $msg) = @_;
4717 return 0 if (!$main::opened_debug_log);
4718 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4720 my @tm = localtime($now);
4722 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4723 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4724 $tm[2], $tm[1], $tm[0],
4725 $remote_user || "-",
4726 $ENV{'REMOTE_HOST'} || "-",
4727 &get_module_name() || "-",
4730 seek(main::DEBUGLOG, 0, 2);
4731 print main::DEBUGLOG $line."\n";
4735 =head2 system_logged(command)
4737 Just calls the Perl system() function, but also logs the command run.
4742 if (&is_readonly_mode()) {
4743 print STDERR "Vetoing command $_[0]\n";
4746 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4747 my $cmd = join(" ", @realcmd);
4749 if ($cmd =~ s/(\s*&\s*)$//) {
4752 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4753 $cmd =~ s/^\((.*)\)\s*$/$1/;
4755 &additional_log('exec', undef, $cmd);
4756 return system(@realcmd);
4759 =head2 backquote_logged(command)
4761 Executes a command and returns the output (like `command`), but also logs it.
4764 sub backquote_logged
4766 if (&is_readonly_mode()) {
4768 print STDERR "Vetoing command $_[0]\n";
4771 my $realcmd = &translate_command($_[0]);
4774 if ($cmd =~ s/(\s*&\s*)$//) {
4777 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4778 $cmd =~ s/^\((.*)\)\s*$/$1/;
4780 &additional_log('exec', undef, $cmd);
4781 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4785 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4787 Runs some command, waiting at most the given number of seconds for it to
4788 complete, and returns the output. The maxlines parameter sets the number
4789 of lines of output to capture. The safe parameter should be set to 1 if the
4790 command is safe for read-only mode users to run.
4793 sub backquote_with_timeout
4795 my $realcmd = &translate_command($_[0]);
4796 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4797 if ($gconfig{'debug_what_cmd'});
4799 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4804 my $elapsed = time() - $start;
4805 last if ($elapsed > $_[1]);
4807 vec($rmask, fileno(OUT), 1) = 1;
4808 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4809 last if (!$sel || $sel < 0);
4811 last if (!defined($line));
4814 if ($_[3] && $linecount >= $_[3]) {
4819 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4823 return wantarray ? ($out, $timed_out) : $out;
4826 =head2 backquote_command(command, safe?)
4828 Executes a command and returns the output (like `command`), subject to
4829 command translation. The safe parameter should be set to 1 if the command
4830 is safe for read-only mode users to run.
4833 sub backquote_command
4835 if (&is_readonly_mode() && !$_[1]) {
4836 print STDERR "Vetoing command $_[0]\n";
4840 my $realcmd = &translate_command($_[0]);
4841 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4845 =head2 kill_logged(signal, pid, ...)
4847 Like Perl's built-in kill function, but also logs the fact that some process
4848 was killed. On Windows, falls back to calling process.exe to terminate a
4854 return scalar(@_)-1 if (&is_readonly_mode());
4855 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4856 if ($gconfig{'debug_what_procs'});
4857 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4858 if ($gconfig{'os_type'} eq 'windows') {
4859 # Emulate some kills with process.exe
4860 my $arg = $_[0] eq "KILL" ? "-k" :
4861 $_[0] eq "TERM" ? "-q" :
4862 $_[0] eq "STOP" ? "-s" :
4863 $_[0] eq "CONT" ? "-r" : undef;
4865 foreach my $p (@_[1..@_-1]) {
4867 $ok ||= kill($_[0], $p);
4870 &execute_command("process $arg $p");
4882 =head2 rename_logged(old, new)
4884 Re-names a file and logs the rename. If the old and new files are on different
4885 filesystems, calls mv or the Windows rename function to do the job.
4890 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4891 return &rename_file($_[0], $_[1]);
4894 =head2 rename_file(old, new)
4896 Renames a file or directory. If the old and new files are on different
4897 filesystems, calls mv or the Windows rename function to do the job.
4902 if (&is_readonly_mode()) {
4903 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4906 my $src = &translate_filename($_[0]);
4907 my $dst = &translate_filename($_[1]);
4908 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4909 if ($gconfig{'debug_what_ops'});
4910 my $ok = rename($src, $dst);
4911 if (!$ok && $! !~ /permission/i) {
4912 # Try the mv command, in case this is a cross-filesystem rename
4913 if ($gconfig{'os_type'} eq 'windows') {
4914 # Need to use rename
4915 my $out = &backquote_command("rename ".quotemeta($_[0]).
4916 " ".quotemeta($_[1])." 2>&1");
4918 $! = $out if (!$ok);
4922 my $out = &backquote_command("mv ".quotemeta($_[0]).
4923 " ".quotemeta($_[1])." 2>&1");
4925 $! = $out if (!$ok);
4931 =head2 symlink_logged(src, dest)
4933 Create a symlink, and logs it. Effectively does the same thing as the Perl
4940 my $rv = &symlink_file($_[0], $_[1]);
4941 &unlock_file($_[1]);
4945 =head2 symlink_file(src, dest)
4947 Creates a soft link, unless in read-only mode. Effectively does the same thing
4948 as the Perl symlink function.
4953 if (&is_readonly_mode()) {
4954 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4957 my $src = &translate_filename($_[0]);
4958 my $dst = &translate_filename($_[1]);
4959 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
4960 if ($gconfig{'debug_what_ops'});
4961 return symlink($src, $dst);
4964 =head2 link_file(src, dest)
4966 Creates a hard link, unless in read-only mode. The existing new link file
4967 will be deleted if necessary. Effectively the same as Perl's link function.
4972 if (&is_readonly_mode()) {
4973 print STDERR "Vetoing link from $_[0] to $_[1]\n";
4976 my $src = &translate_filename($_[0]);
4977 my $dst = &translate_filename($_[1]);
4978 &webmin_debug_log('LINK', "src=$src dst=$dst")
4979 if ($gconfig{'debug_what_ops'});
4980 unlink($dst); # make sure link works
4981 return link($src, $dst);
4984 =head2 make_dir(dir, perms, recursive)
4986 Creates a directory and sets permissions on it, unless in read-only mode.
4987 The perms parameter sets the octal permissions to apply, which unlike Perl's
4988 mkdir will really get set. The recursive flag can be set to 1 to have the
4989 function create parent directories too.
4994 my ($dir, $perms, $recur) = @_;
4995 if (&is_readonly_mode()) {
4996 print STDERR "Vetoing directory $dir\n";
4999 $dir = &translate_filename($dir);
5000 my $exists = -d $dir ? 1 : 0;
5001 return 1 if ($exists && $recur); # already exists
5002 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5003 my $rv = mkdir($dir, $perms);
5004 if (!$rv && $recur) {
5005 # Failed .. try mkdir -p
5006 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5007 my $ex = &execute_command("mkdir $param "."e_path($dir));
5013 chmod($perms, $dir);
5018 =head2 set_ownership_permissions(user, group, perms, file, ...)
5020 Sets the user, group owner and permissions on some files. The parameters are :
5022 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5024 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5026 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5028 =item file - One or more files or directories to modify.
5031 sub set_ownership_permissions
5033 my ($user, $group, $perms, @files) = @_;
5034 if (&is_readonly_mode()) {
5035 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5038 @files = map { &translate_filename($_) } @files;
5039 if ($gconfig{'debug_what_ops'}) {
5040 foreach my $f (@files) {
5041 &webmin_debug_log('PERMS',
5042 "file=$f user=$user group=$group perms=$perms");
5046 if (defined($user)) {
5047 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5049 if (defined($group)) {
5050 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5053 my @uinfo = getpwuid($uid);
5056 $rv = chown($uid, $gid, @files);
5058 if ($rv && defined($perms)) {
5059 $rv = chmod($perms, @files);
5064 =head2 unlink_logged(file, ...)
5066 Like Perl's unlink function, but locks the files beforehand and un-locks them
5067 after so that the deletion is logged by Webmin.
5073 foreach my $f (@_) {
5074 if (!&test_lock($f)) {
5079 my @rv = &unlink_file(@_);
5080 foreach my $f (@_) {
5085 return wantarray ? @rv : $rv[0];
5088 =head2 unlink_file(file, ...)
5090 Deletes some files or directories. Like Perl's unlink function, but also
5091 recursively deletes directories with the rm command if needed.
5096 return 1 if (&is_readonly_mode());
5099 foreach my $f (@_) {
5100 my $realf = &translate_filename($f);
5101 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5103 if (!rmdir($realf)) {
5104 if ($gconfig{'os_type'} eq 'windows') {
5105 # Call del and rmdir commands
5108 my $out = `del /q "$qm" 2>&1`;
5110 $out = `rmdir "$qm" 2>&1`;
5115 my $qm = quotemeta($realf);
5116 my $out = `rm -rf $qm 2>&1`;
5125 if (!unlink($realf)) {
5131 return wantarray ? ($rv, $err) : $rv;
5134 =head2 copy_source_dest(source, dest)
5136 Copy some file or directory to a new location. Returns 1 on success, or 0
5137 on failure - also sets $! on failure. If the source is a directory, uses
5138 piped tar commands to copy a whole directory structure including permissions
5142 sub copy_source_dest
5144 return (1, undef) if (&is_readonly_mode());
5145 my ($src, $dst) = @_;
5148 &webmin_debug_log('COPY', "src=$src dst=$dst")
5149 if ($gconfig{'debug_what_ops'});
5150 if ($gconfig{'os_type'} eq 'windows') {
5151 # No tar or cp on windows, so need to use copy command
5155 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5158 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5166 # A directory .. need to copy with tar command
5167 my @st = stat($src);
5170 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5171 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5178 # Can just copy with cp
5179 my $out = &backquote_logged("cp -p ".quotemeta($src).
5180 " ".quotemeta($dst)." 2>&1");
5186 return wantarray ? ($ok, $err) : $ok;
5189 =head2 remote_session_name(host|&server)
5191 Generates a session ID for some server. For this server, this will always
5192 be an empty string. For a server object it will include the hostname and
5193 port and PID. For a server name, it will include the hostname and PID. For
5197 sub remote_session_name
5199 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5200 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5201 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5202 ref($_[0]) ? "" : "$_[0].$$";
5205 =head2 remote_foreign_require(server, module, file)
5207 Connects to rpc.cgi on a remote webmin server and have it open a session
5208 to a process that will actually do the require and run functions. This is the
5209 equivalent for foreign_require, but for a remote Webmin system. The server
5210 parameter can either be a hostname of a system registered in the Webmin
5211 Servers Index module, or a hash reference for a system from that module.
5214 sub remote_foreign_require
5216 my $call = { 'action' => 'require',
5219 my $sn = &remote_session_name($_[0]);
5220 if ($remote_session{$sn}) {
5221 $call->{'session'} = $remote_session{$sn};
5224 $call->{'newsession'} = 1;
5226 my $rv = &remote_rpc_call($_[0], $call);
5227 if ($rv->{'session'}) {
5228 $remote_session{$sn} = $rv->{'session'};
5229 $remote_session_server{$sn} = $_[0];
5233 =head2 remote_foreign_call(server, module, function, [arg]*)
5235 Call a function on a remote server. Must have been setup first with
5236 remote_foreign_require for the same server and module. Equivalent to
5237 foreign_call, but with the extra server parameter to specify the remote
5241 sub remote_foreign_call
5243 return undef if (&is_readonly_mode());
5244 my $sn = &remote_session_name($_[0]);
5245 return &remote_rpc_call($_[0], { 'action' => 'call',
5248 'session' => $remote_session{$sn},
5249 'args' => [ @_[3 .. $#_] ] } );
5252 =head2 remote_foreign_check(server, module, [api-only])
5254 Checks if some module is installed and supported on a remote server. Equivilant
5255 to foreign_check, but for the remote Webmin system specified by the server
5259 sub remote_foreign_check
5261 return &remote_rpc_call($_[0], { 'action' => 'check',
5266 =head2 remote_foreign_config(server, module)
5268 Gets the configuration for some module from a remote server, as a hash.
5269 Equivalent to foreign_config, but for a remote system.
5272 sub remote_foreign_config
5274 return &remote_rpc_call($_[0], { 'action' => 'config',
5275 'module' => $_[1] });
5278 =head2 remote_eval(server, module, code)
5280 Evaluates some perl code in the context of a module on a remote webmin server.
5281 The server parameter must be the hostname of a remote system, module must
5282 be a module directory name, and code a string of Perl code to run. This can
5283 only be called after remote_foreign_require for the same server and module.
5288 return undef if (&is_readonly_mode());
5289 my $sn = &remote_session_name($_[0]);
5290 return &remote_rpc_call($_[0], { 'action' => 'eval',
5293 'session' => $remote_session{$sn} });
5296 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5298 Transfers some local file to another server via Webmin's RPC protocol, and
5299 returns the resulting remote filename. If the remotefile parameter is given,
5300 that is the destination filename which will be used. Otherwise a randomly
5301 selected temporary filename will be used, and returned by the function.
5306 return undef if (&is_readonly_mode());
5308 my $sn = &remote_session_name($_[0]);
5309 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5310 # Copy data over TCP connection
5311 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5313 'name' => $_[3] } );
5315 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5316 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5317 return &$main::remote_error_handler("Failed to transfer file : $error")
5320 while(read(FILE, $got, 1024) > 0) {
5324 shutdown(TWRITE, 1);
5326 if ($error && $error !~ /^OK/) {
5327 # Got back an error!
5328 return &$main::remote_error_handler("Failed to transfer file : $error");
5334 # Just pass file contents as parameters
5336 while(read(FILE, $got, 1024) > 0) {
5340 return &remote_rpc_call($_[0], { 'action' => 'write',
5343 'session' => $remote_session{$sn} });
5347 =head2 remote_read(server, localfile, remotefile)
5349 Transfers a file from a remote server to this system, using Webmin's RPC
5350 protocol. The server parameter must be the hostname of a system registered
5351 in the Webmin Servers Index module, localfile is the destination path on this
5352 system, and remotefile is the file to fetch from the remote server.
5357 my $sn = &remote_session_name($_[0]);
5358 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5359 # Copy data over TCP connection
5360 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5361 'file' => $_[2] } );
5363 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5366 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5367 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5368 return &$main::remote_error_handler("Failed to transfer file : $error")
5371 open(FILE, ">$_[1]");
5372 while(read(TREAD, $got, 1024) > 0) {
5379 # Just get data as return value
5380 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5382 'session' => $remote_session{$sn} });
5383 open(FILE, ">$_[1]");
5389 =head2 remote_finished
5391 Close all remote sessions. This happens automatically after a while
5392 anyway, but this function should be called to clean things up faster.
5397 foreach my $sn (keys %remote_session) {
5398 my $server = $remote_session_server{$sn};
5399 &remote_rpc_call($server, { 'action' => 'quit',
5400 'session' => $remote_session{$sn} } );
5401 delete($remote_session{$sn});
5402 delete($remote_session_server{$sn});
5404 foreach $fh (keys %fast_fh_cache) {
5406 delete($fast_fh_cache{$fh});
5410 =head2 remote_error_setup(&function)
5412 Sets a function to be called instead of &error when a remote RPC operation
5413 fails. Useful if you want to have more control over your remote operations.
5416 sub remote_error_setup
5418 $main::remote_error_handler = $_[0] || \&error;
5421 =head2 remote_rpc_call(server, structure)
5423 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5424 and then reads back a reply structure. This is mainly for internal use only,
5425 and is called by the other remote_* functions.
5431 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5433 # Server structure was given
5435 $serv->{'user'} || $serv->{'id'} == 0 ||
5436 return &$main::remote_error_handler(
5437 "No Webmin login set for server");
5440 # lookup the server in the webmin servers module if needed
5441 if (!defined(%main::remote_servers_cache)) {
5442 &foreign_require("servers", "servers-lib.pl");
5443 foreach $s (&foreign_call("servers", "list_servers")) {
5444 $main::remote_servers_cache{$s->{'host'}} = $s;
5445 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5448 $serv = $main::remote_servers_cache{$_[0]};
5449 $serv || return &$main::remote_error_handler(
5450 "No Webmin Servers entry for $_[0]");
5451 $serv->{'user'} || return &$main::remote_error_handler(
5452 "No login set for server $_[0]");
5455 # Work out the username and password
5457 if ($serv->{'sameuser'}) {
5458 $user = $remote_user;
5459 defined($main::remote_pass) || return &$main::remote_error_handler(
5460 "Password for this server is not available");
5461 $pass = $main::remote_pass;
5464 $user = $serv->{'user'};
5465 $pass = $serv->{'pass'};
5468 if ($serv->{'fast'} || !$sn) {
5469 # Make TCP connection call to fastrpc.cgi
5470 if (!$fast_fh_cache{$sn} && $sn) {
5471 # Need to open the connection
5472 my $con = &make_http_connection(
5473 $serv->{'host'}, $serv->{'port'}, $serv->{'ssl'},
5474 "POST", "/fastrpc.cgi");
5475 return &$main::remote_error_handler(
5476 "Failed to connect to $serv->{'host'} : $con")
5478 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5479 &write_http_connection($con, "User-agent: Webmin\r\n");
5480 my $auth = &encode_base64("$user:$pass");
5482 &write_http_connection($con, "Authorization: basic $auth\r\n");
5483 &write_http_connection($con, "Content-length: ",
5484 length($tostr),"\r\n");
5485 &write_http_connection($con, "\r\n");
5486 &write_http_connection($con, $tostr);
5488 # read back the response
5489 my $line = &read_http_connection($con);
5490 $line =~ tr/\r\n//d;
5491 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5492 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5494 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5495 return &$main::remote_error_handler("HTTP error : $line");
5497 $line = &read_http_connection($con);
5498 $line =~ tr/\r\n//d;
5500 $line = &read_http_connection($con);
5501 if ($line =~ /^0\s+(.*)/) {
5502 return &$main::remote_error_handler("RPC error : $1");
5504 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5505 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5506 # Started ok .. connect and save SID
5507 &close_http_connection($con);
5508 my ($port, $sid, $version, $error) = ($1, $2, $3);
5509 &open_socket($serv->{'host'}, $port, $sid, \$error);
5510 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5512 $fast_fh_cache{$sn} = $sid;
5513 $remote_server_version{$sn} = $version;
5516 while($stuff = &read_http_connection($con)) {
5519 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5522 elsif (!$fast_fh_cache{$sn}) {
5523 # Open the connection by running fastrpc.cgi locally
5524 pipe(RPCOUTr, RPCOUTw);
5528 open(STDOUT, ">&RPCOUTw");
5532 $ENV{'REQUEST_METHOD'} = 'GET';
5533 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5534 $ENV{'SERVER_ROOT'} ||= $root_directory;
5536 if ($base_remote_user ne 'root' &&
5537 $base_remote_user ne 'admin') {
5538 # Need to fake up a login for the CGI!
5539 &read_acl(undef, \%acl);
5540 $ENV{'BASE_REMOTE_USER'} =
5541 $ENV{'REMOTE_USER'} =
5542 $acl{'root'} ? 'root' : 'admin';
5544 delete($ENV{'FOREIGN_MODULE_NAME'});
5545 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5546 chdir($root_directory);
5547 if (!exec("$root_directory/fastrpc.cgi")) {
5548 print "exec failed : $!\n";
5555 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5559 if ($line =~ /^0\s+(.*)/) {
5560 return &$main::remote_error_handler("RPC error : $2");
5562 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5563 # Started ok .. connect and save SID
5565 my ($port, $sid, $error) = ($1, $2, undef);
5566 &open_socket("localhost", $port, $sid, \$error);
5567 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5568 $fast_fh_cache{$sn} = $sid;
5575 &error("Bad response from fastrpc.cgi : $line");
5578 # Got a connection .. send off the request
5579 my $fh = $fast_fh_cache{$sn};
5580 my $tostr = &serialise_variable($_[1]);
5581 print $fh length($tostr)," $fh\n";
5583 my $rlen = int(<$fh>);
5584 my ($fromstr, $got);
5585 while(length($fromstr) < $rlen) {
5586 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5587 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5590 my $from = &unserialise_variable($fromstr);
5592 return &$main::remote_error_handler("Remote Webmin error");
5594 if (defined($from->{'arv'})) {
5595 return @{$from->{'arv'}};
5598 return $from->{'rv'};
5602 # Call rpc.cgi on remote server
5603 my $tostr = &serialise_variable($_[1]);
5605 my $con = &make_http_connection($serv->{'host'}, $serv->{'port'},
5606 $serv->{'ssl'}, "POST", "/rpc.cgi");
5607 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5609 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5610 &write_http_connection($con, "User-agent: Webmin\r\n");
5611 my $auth = &encode_base64("$user:$pass");
5613 &write_http_connection($con, "Authorization: basic $auth\r\n");
5614 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5615 &write_http_connection($con, "\r\n");
5616 &write_http_connection($con, $tostr);
5618 # read back the response
5619 my $line = &read_http_connection($con);
5620 $line =~ tr/\r\n//d;
5621 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5622 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5624 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5626 $line = &read_http_connection($con);
5627 $line =~ tr/\r\n//d;
5630 while($line = &read_http_connection($con)) {
5634 my $from = &unserialise_variable($fromstr);
5635 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5636 if (defined($from->{'arv'})) {
5637 return @{$from->{'arv'}};
5640 return $from->{'rv'};
5645 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5647 Executes some function in parallel on multiple servers at once. Fills in
5648 the returns and errors arrays respectively. If the module and library
5649 parameters are given, that module is remotely required on the server first,
5650 to check if it is connectable. The parameters are :
5652 =item servers - A list of Webmin system hash references.
5654 =item parallel - Number of parallel operations to perform.
5656 =item function - Reference to function to call for each system.
5658 =item args - Additional parameters to the function.
5660 =item returns - Array ref to place return values into, in same order as servers.
5662 =item errors - Array ref to place error messages into.
5664 =item module - Optional module to require on the remote system first.
5666 =item library - Optional library to require in the module.
5669 sub remote_multi_callback
5671 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5672 &remote_error_setup(\&remote_multi_callback_error);
5674 # Call the functions
5676 foreach my $g (@$servs) {
5682 $remote_multi_callback_err = undef;
5684 # Require the remote lib
5685 &remote_foreign_require($g->{'host'}, $mod, $lib);
5686 if ($remote_multi_callback_err) {
5687 # Failed .. return error
5688 print $wh &serialise_variable(
5689 [ undef, $remote_multi_callback_err ]);
5695 my $a = ref($args) ? $args->[$p] : $args;
5696 my $rv = &$func($g, $a);
5699 print $wh &serialise_variable(
5700 [ $rv, $remote_multi_callback_err ]);
5708 # Read back the results
5710 foreach my $g (@$servs) {
5714 $errs->[$p] = "Failed to read response from $g->{'host'}";
5717 my $rv = &unserialise_variable($line);
5719 $rets->[$p] = $rv->[0];
5720 $errs->[$p] = $rv->[1];
5725 &remote_error_setup(undef);
5728 sub remote_multi_callback_error
5730 $remote_multi_callback_err = $_[0];
5733 =head2 serialise_variable(variable)
5735 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5736 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5737 called on each member to serialize the entire object.
5740 sub serialise_variable
5742 if (!defined($_[0])) {
5748 $rv = &urlize($_[0]);
5750 elsif ($r eq 'SCALAR') {
5751 $rv = &urlize(${$_[0]});
5753 elsif ($r eq 'ARRAY') {
5754 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5756 elsif ($r eq 'HASH') {
5757 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5758 &urlize(&serialise_variable($_[0]->{$_})) }
5761 elsif ($r eq 'REF') {
5762 $rv = &serialise_variable(${$_[0]});
5764 elsif ($r eq 'CODE') {
5769 # An object - treat as a hash
5770 $r = "OBJECT ".&urlize($r);
5771 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5772 &urlize(&serialise_variable($_[0]->{$_})) }
5775 return ($r ? $r : 'VAL').",".$rv;
5778 =head2 unserialise_variable(string)
5780 Converts a string created by serialise_variable() back into the original
5781 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5782 object, the same class is used on this system, if available.
5785 sub unserialise_variable
5787 my @v = split(/,/, $_[0]);
5789 if ($v[0] eq 'VAL') {
5790 @v = split(/,/, $_[0], -1);
5791 $rv = &un_urlize($v[1]);
5793 elsif ($v[0] eq 'SCALAR') {
5794 local $r = &un_urlize($v[1]);
5797 elsif ($v[0] eq 'ARRAY') {
5799 for(my $i=1; $i<@v; $i++) {
5800 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5803 elsif ($v[0] eq 'HASH') {
5805 for(my $i=1; $i<@v; $i+=2) {
5806 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5807 &unserialise_variable(&un_urlize($v[$i+1]));
5810 elsif ($v[0] eq 'REF') {
5811 local $r = &unserialise_variable($v[1]);
5814 elsif ($v[0] eq 'UNDEF') {
5817 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5818 # An object hash that we have to re-bless
5821 for(my $i=1; $i<@v; $i+=2) {
5822 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5823 &unserialise_variable(&un_urlize($v[$i+1]));
5831 =head2 other_groups(user)
5833 Returns a list of secondary groups a user is a member of, as a list of
5842 while(my @g = getgrent()) {
5843 my @m = split(/\s+/, $g[3]);
5844 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5846 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5850 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5852 Returns HTML for a button that pops up a data chooser window. The parameters
5855 =item dayfield - Name of the text field to place the day of the month into.
5857 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5859 =item yearfield - Name of the text field to place the year into.
5862 sub date_chooser_button
5864 return &theme_date_chooser_button(@_)
5865 if (defined(&theme_date_chooser_button));
5866 my ($w, $h) = (250, 225);
5867 if ($gconfig{'db_sizedate'}) {
5868 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5870 return "<input type=button onClick='window.dfield = form.$_[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";
5873 =head2 help_file(module, file)
5875 Returns the path to a module's help file of some name, typically under the
5876 help directory with a .html extension.
5881 my $mdir = &module_root_directory($_[0]);
5882 my $dir = "$mdir/help";
5883 foreach my $o (@lang_order_list) {
5884 my $lang = "$dir/$_[1].$current_lang.html";
5885 return $lang if (-r $lang);
5887 return "$dir/$_[1].html";
5892 Seeds the random number generator, if not already done in this script. On Linux
5893 this makes use of the current time, process ID and a read from /dev/urandom.
5894 On other systems, only the current time and process ID are used.
5899 if (!$main::done_seed_random) {
5900 if (open(RANDOM, "/dev/urandom")) {
5902 read(RANDOM, $buf, 4);
5904 srand(time() ^ $$ ^ $buf);
5909 $main::done_seed_random = 1;
5913 =head2 disk_usage_kb(directory)
5915 Returns the number of kB used by some directory and all subdirs. Implemented
5916 by calling the C<du -k> command.
5921 my $dir = &translate_filename($_[0]);
5923 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5925 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5927 return $out =~ /^([0-9]+)/ ? $1 : "???";
5930 =head2 recursive_disk_usage(directory)
5932 Returns the number of bytes taken up by all files in some directory and all
5933 sub-directories, by summing up their lengths. The disk_usage_kb is more
5934 reflective of reality, as the filesystem typically pads file sizes to 1k or
5938 sub recursive_disk_usage
5940 my $dir = &translate_filename($_[0]);
5945 my @st = stat($dir);
5951 my @files = readdir(DIR);
5953 foreach my $f (@files) {
5954 next if ($f eq "." || $f eq "..");
5955 $rv += &recursive_disk_usage("$dir/$f");
5961 =head2 help_search_link(term, [ section, ... ] )
5963 Returns HTML for a link to the man module for searching local and online
5964 docs for various search terms. The term parameter can either be a single
5965 word like 'bind', or a space-separated list of words. This function is typically
5966 used by modules that want to refer users to additional documentation in man
5967 pages or local system doc files.
5970 sub help_search_link
5972 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
5973 my $for = &urlize(shift(@_));
5974 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
5975 join("&", map { "section=$_" } @_)."&".
5976 "for=$for&exact=1&check=".&get_module_name()."'>".
5977 $text{'helpsearch'}."</a>\n";
5984 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
5986 Opens a connection to some HTTP server, maybe through a proxy, and returns
5987 a handle object. The handle can then be used to send additional headers
5988 and read back a response. If anything goes wrong, returns an error string.
5989 The parameters are :
5991 =item host - Hostname or IP address of the webserver to connect to.
5993 =item port - HTTP port number to connect to.
5995 =item ssl - Set to 1 to connect in SSL mode.
5997 =item method - HTTP method, like GET or POST.
5999 =item page - Page to request on the webserver, like /foo/index.html
6001 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6004 sub make_http_connection
6006 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6009 foreach my $h (@$headers) {
6010 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6014 if (&is_readonly_mode()) {
6015 return "HTTP connections not allowed in readonly mode";
6017 my $rv = { 'fh' => time().$$ };
6020 eval "use Net::SSLeay";
6021 $@ && return $text{'link_essl'};
6022 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6023 eval "Net::SSLeay::load_error_strings()";
6024 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6025 return "Failed to create SSL context";
6026 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6027 return "Failed to create SSL connection";
6029 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6030 !&no_proxy($host)) {
6033 &open_socket($1, $2, $rv->{'fh'}, \$error);
6036 my $fh = $rv->{'fh'};
6037 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6038 if ($gconfig{'proxy_user'}) {
6039 my $auth = &encode_base64(
6040 "$gconfig{'proxy_user'}:".
6041 "$gconfig{'proxy_pass'}");
6042 $auth =~ tr/\r\n//d;
6043 print $fh "Proxy-Authorization: Basic $auth\r\n";
6047 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6048 return "Proxy error : $3" if ($2 != 200);
6051 return "Proxy error : $line";
6056 elsif (!$gconfig{'proxy_fallback'}) {
6057 # Connection to proxy failed - give up
6064 &open_socket($host, $port, $rv->{'fh'}, \$error);
6065 return $error if ($error);
6067 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6068 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6069 return "SSL connect() failed";
6070 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6071 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6074 # Plain HTTP request
6076 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6077 !&no_proxy($host)) {
6080 &open_socket($1, $2, $rv->{'fh'}, \$error);
6084 my $fh = $rv->{'fh'};
6085 my $rtxt = $method." ".
6086 "http://$host:$port$page HTTP/1.0\r\n";
6087 if ($gconfig{'proxy_user'}) {
6088 my $auth = &encode_base64(
6089 "$gconfig{'proxy_user'}:".
6090 "$gconfig{'proxy_pass'}");
6091 $auth =~ tr/\r\n//d;
6092 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6097 elsif (!$gconfig{'proxy_fallback'}) {
6102 # Connecting directly
6104 &open_socket($host, $port, $rv->{'fh'}, \$error);
6105 return $error if ($error);
6106 my $fh = $rv->{'fh'};
6107 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6114 =head2 read_http_connection(&handle, [bytes])
6116 Reads either one line or up to the specified number of bytes from the handle,
6117 originally supplied by make_http_connection.
6120 sub read_http_connection
6124 if ($h->{'ssl_con'}) {
6127 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6128 # need to read more..
6129 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6131 $rv = $h->{'buffer'};
6132 delete($h->{'buffer'});
6135 $h->{'buffer'} .= $more;
6137 $rv = substr($h->{'buffer'}, 0, $idx+1);
6138 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6141 if (length($h->{'buffer'})) {
6142 $rv = $h->{'buffer'};
6143 delete($h->{'buffer'});
6146 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6152 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6155 my $fh = $h->{'fh'};
6159 $rv = undef if ($rv eq "");
6163 =head2 write_http_connection(&handle, [data+])
6165 Writes the given data to the given HTTP connection handle.
6168 sub write_http_connection
6171 my $fh = $h->{'fh'};
6173 if ($h->{'ssl_ctx'}) {
6174 foreach my $s (@_) {
6175 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6176 $allok = 0 if (!$ok);
6180 my $ok = (print $fh @_);
6181 $allok = 0 if (!$ok);
6186 =head2 close_http_connection(&handle)
6188 Closes a connection to an HTTP server, identified by the given handle.
6191 sub close_http_connection
6197 =head2 clean_environment
6199 Deletes any environment variables inherited from miniserv so that they
6200 won't be passed to programs started by webmin. This is useful when calling
6201 programs that check for CGI-related environment variables and modify their
6202 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6205 sub clean_environment
6207 %UNCLEAN_ENV = %ENV;
6208 foreach my $k (keys %ENV) {
6209 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6213 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6214 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6215 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6216 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6217 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6218 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6219 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6220 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD') {
6225 =head2 reset_environment
6227 Puts the environment back how it was before clean_environment was callled.
6230 sub reset_environment
6232 if (defined(%UNCLEAN_ENV)) {
6233 foreach my $k (keys %UNCLEAN_ENV) {
6234 $ENV{$k} = $UNCLEAN_ENV{$k};
6236 undef(%UNCLEAN_ENV);
6240 =head2 progress_callback
6242 Never called directly, but useful for passing to &http_download to print
6243 out progress of an HTTP request.
6246 sub progress_callback
6248 if (defined(&theme_progress_callback)) {
6249 # Call the theme override
6250 return &theme_progress_callback(@_);
6254 print $progress_callback_prefix;
6256 $progress_size = $_[1];
6257 $progress_step = int($_[1] / 10);
6258 print &text('progress_size', $progress_callback_url,
6259 $progress_size),"<br>\n";
6262 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6264 $last_progress_time = $last_progress_size = undef;
6266 elsif ($_[0] == 3) {
6268 my $sp = $progress_callback_prefix.(" " x 5);
6269 if ($progress_size) {
6270 # And we have a size to compare against
6271 my $st = int(($_[1] * 10) / $progress_size);
6272 my $time_now = time();
6273 if ($st != $progress_step ||
6274 $time_now - $last_progress_time > 60) {
6275 # Show progress every 10% or 60 seconds
6276 print $sp,&text('progress_data', $_[1], int($_[1]*100/$progress_size)),"<br>\n";
6277 $last_progress_time = $time_now;
6279 $progress_step = $st;
6282 # No total size .. so only show in 100k jumps
6283 if ($_[1] > $last_progress_size+100*1024) {
6284 print $sp,&text('progress_data2', $_[1]),"<br>\n";
6285 $last_progress_size = $_[1];
6289 elsif ($_[0] == 4) {
6290 # All done downloading
6291 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6293 elsif ($_[0] == 5) {
6294 # Got new location after redirect
6295 $progress_callback_url = $_[1];
6297 elsif ($_[0] == 6) {
6299 $progress_callback_url = $_[1];
6300 print &text('progress_incache', $progress_callback_url),"<br>\n";
6304 =head2 switch_to_remote_user
6306 Changes the user and group of the current process to that of the unix user
6307 with the same name as the current webmin login, or fails if there is none.
6308 This should be called by Usermin module scripts that only need to run with
6309 limited permissions.
6312 sub switch_to_remote_user
6314 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6316 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6317 &create_missing_homedir(\@remote_user_info);
6319 &switch_to_unix_user(\@remote_user_info);
6320 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6321 $ENV{'HOME'} = $remote_user_info[7];
6323 # Export global variables to caller
6324 if ($main::export_to_caller) {
6325 my ($callpkg) = caller();
6326 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6330 =head2 switch_to_unix_user(&user-details)
6332 Switches the current process to the UID and group ID from the given list
6333 of user details, which must be in the format returned by getpwnam.
6336 sub switch_to_unix_user
6339 if (!defined($uinfo->[0])) {
6340 # No username given, so just use given GID
6341 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6344 # Use all groups from user
6345 ($(, $)) = ( $uinfo->[3],
6346 "$uinfo->[3] ".join(" ", $uinfo->[3],
6347 &other_groups($uinfo->[0])) );
6350 POSIX::setuid($uinfo->[2]);
6352 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6353 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6357 =head2 eval_as_unix_user(username, &code)
6359 Runs some code fragment with the effective UID and GID switch to that
6360 of the given Unix user, so that file IO takes place with his permissions.
6364 sub eval_as_unix_user
6366 my ($user, $code) = @_;
6367 my @uinfo = getpwnam($user);
6368 if (!scalar(@uinfo)) {
6369 &error("eval_as_unix_user called with invalid user $user");
6371 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6375 local $main::error_must_die = 1;
6382 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6385 return wantarray ? @rv : $rv[0];
6388 =head2 create_user_config_dirs
6390 Creates per-user config directories and sets $user_config_directory and
6391 $user_module_config_directory to them. Also reads per-user module configs
6392 into %userconfig. This should be called by Usermin module scripts that need
6393 to store per-user preferences or other settings.
6396 sub create_user_config_dirs
6398 return if (!$gconfig{'userconfig'});
6399 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6400 return if (!@uinfo || !$uinfo[7]);
6401 &create_missing_homedir(\@uinfo);
6402 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6403 if (!-d $user_config_directory) {
6404 mkdir($user_config_directory, 0700) ||
6405 &error("Failed to create $user_config_directory : $!");
6406 if ($< == 0 && $uinfo[2]) {
6407 chown($uinfo[2], $uinfo[3], $user_config_directory);
6410 if (&get_module_name()) {
6411 $user_module_config_directory = $user_config_directory."/".
6413 if (!-d $user_module_config_directory) {
6414 mkdir($user_module_config_directory, 0700) ||
6415 &error("Failed to create $user_module_config_directory : $!");
6416 if ($< == 0 && $uinfo[2]) {
6417 chown($uinfo[2], $uinfo[3], $user_config_directory);
6421 &read_file_cached("$module_root_directory/defaultuconfig",
6423 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6424 &read_file_cached("$user_module_config_directory/config",
6428 # Export global variables to caller
6429 if ($main::export_to_caller) {
6430 my ($callpkg) = caller();
6431 foreach my $v ('$user_config_directory',
6432 '$user_module_config_directory', '%userconfig') {
6433 my ($vt, $vn) = split('', $v, 2);
6434 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6439 =head2 create_missing_homedir(&uinfo)
6441 If auto homedir creation is enabled, create one for this user if needed.
6442 For internal use only.
6445 sub create_missing_homedir
6448 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6449 # Use has no home dir .. make one
6450 system("mkdir -p ".quotemeta($uinfo->[7]));
6451 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6452 if ($gconfig{'create_homedir_perms'} ne '') {
6453 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6458 =head2 filter_javascript(text)
6460 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6461 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6464 sub filter_javascript
6467 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6468 $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;
6469 $rv =~ s/(javascript:)/x$1/gi;
6470 $rv =~ s/(vbscript:)/x$1/gi;
6474 =head2 resolve_links(path)
6476 Given a path that may contain symbolic links, returns the real path.
6482 $path =~ s/\/+/\//g;
6483 $path =~ s/\/$// if ($path ne "/");
6484 my @p = split(/\/+/, $path);
6486 for(my $i=0; $i<@p; $i++) {
6487 my $sofar = "/".join("/", @p[0..$i]);
6488 my $lnk = readlink($sofar);
6489 if ($lnk eq $sofar) {
6490 # Link to itself! Cannot do anything more really ..
6493 elsif ($lnk =~ /^\//) {
6494 # Link is absolute..
6495 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6499 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6505 =head2 simplify_path(path, bogus)
6507 Given a path, maybe containing elements ".." and "." , convert it to a
6508 clean, absolute form. Returns undef if this is not possible.
6516 my @bits = split(/\/+/, $dir);
6519 foreach my $b (@bits) {
6523 elsif ($b eq "..") {
6525 if (scalar(@fixedbits) == 0) {
6526 # Cannot! Already at root!
6533 push(@fixedbits, $b);
6536 return "/".join('/', @fixedbits);
6539 =head2 same_file(file1, file2)
6541 Returns 1 if two files are actually the same
6546 return 1 if ($_[0] eq $_[1]);
6547 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6548 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6549 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6550 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6551 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6552 return 0 if (!@stat1 || !@stat2);
6553 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6556 =head2 flush_webmin_caches
6558 Clears all in-memory and on-disk caches used by Webmin.
6561 sub flush_webmin_caches
6563 undef(%main::read_file_cache);
6564 undef(%main::acl_hash_cache);
6565 undef(%main::acl_array_cache);
6566 undef(%main::has_command_cache);
6567 undef(@main::list_languages_cache);
6568 undef($main::got_list_usermods_cache);
6569 undef(@main::list_usermods_cache);
6570 undef(%main::foreign_installed_cache);
6571 unlink("$config_directory/module.infos.cache");
6572 &get_all_module_infos();
6575 =head2 list_usermods
6577 Returns a list of additional module restrictions. For internal use in
6583 if (!$main::got_list_usermods_cache) {
6584 @main::list_usermods_cache = ( );
6586 open(USERMODS, "$config_directory/usermin.mods");
6588 if (/^([^:]+):(\+|-|):(.*)/) {
6589 push(@main::list_usermods_cache,
6590 [ $1, $2, [ split(/\s+/, $3) ] ]);
6594 $main::got_list_usermods_cache = 1;
6596 return @main::list_usermods_cache;
6599 =head2 available_usermods(&allmods, &usermods)
6601 Returns a list of modules that are available to the given user, based
6602 on usermod additional/subtractions. For internal use by Usermin only.
6605 sub available_usermods
6607 return @{$_[0]} if (!@{$_[1]});
6609 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6610 my @uinfo = @remote_user_info;
6611 @uinfo = getpwnam($remote_user) if (!@uinfo);
6612 foreach my $u (@{$_[1]}) {
6614 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6617 elsif ($u->[0] =~ /^\@(.*)$/) {
6618 # Check for group membership
6619 my @ginfo = getgrnam($1);
6620 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6621 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6623 elsif ($u->[0] =~ /^\//) {
6624 # Check users and groups in file
6626 open(USERFILE, $u->[0]);
6629 if ($_ eq $remote_user) {
6632 elsif (/^\@(.*)$/) {
6633 my @ginfo = getgrnam($1);
6635 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6636 &indexof($remote_user,
6637 split(/\s+/, $ginfo[3])) >= 0));
6644 if ($u->[1] eq "+") {
6645 map { $mods{$_}++ } @{$u->[2]};
6647 elsif ($u->[1] eq "-") {
6648 map { delete($mods{$_}) } @{$u->[2]};
6652 map { $mods{$_}++ } @{$u->[2]};
6656 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6659 =head2 get_available_module_infos(nocache)
6661 Returns a list of modules available to the current user, based on
6662 operating system support, access control and usermod restrictions. Useful
6663 in themes that need to display a list of modules the user can use.
6664 Each element of the returned array is a hash reference in the same format as
6665 returned by get_module_info.
6668 sub get_available_module_infos
6671 &read_acl(\%acl, \%uacl);
6672 my $risk = $gconfig{'risk_'.$base_remote_user};
6674 foreach my $minfo (&get_all_module_infos($_[0])) {
6675 next if (!&check_os_support($minfo));
6677 # Check module risk level
6678 next if ($risk ne 'high' && $minfo->{'risk'} &&
6679 $minfo->{'risk'} !~ /$risk/);
6683 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6684 !$acl{$base_remote_user,"*"});
6686 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6690 # Check usermod restrictions
6691 my @usermods = &list_usermods();
6692 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6693 &available_usermods(\@rv, \@usermods);
6695 # Check RBAC restrictions
6697 foreach my $m (@rv) {
6698 if (&supports_rbac($m->{'dir'}) &&
6699 &use_rbac_module_acl(undef, $m->{'dir'})) {
6700 local $rbacs = &get_rbac_module_acl($remote_user,
6708 # Module or system doesn't support RBAC
6709 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6715 if (defined(&theme_foreign_available)) {
6716 foreach my $m (@rbacrv) {
6717 if (&theme_foreign_available($m->{'dir'})) {
6726 # Check licence module vetos
6728 if ($main::licence_module) {
6729 foreach my $m (@themerv) {
6730 if (&foreign_call($main::licence_module,
6731 "check_module_licence", $m->{'dir'})) {
6743 =head2 get_visible_module_infos(nocache)
6745 Like get_available_module_infos, but excludes hidden modules from the list.
6746 Each element of the returned array is a hash reference in the same format as
6747 returned by get_module_info.
6750 sub get_visible_module_infos
6753 my $pn = &get_product_name();
6754 return grep { !$_->{'hidden'} &&
6755 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6758 =head2 get_visible_modules_categories(nocache)
6760 Returns a list of Webmin module categories, each of which is a hash ref
6761 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6762 of modules in the category, in the format returned by get_module_info.
6763 Un-used modules are automatically assigned to the 'unused' category, and
6764 those with no category are put into 'others'.
6767 sub get_visible_modules_categories
6770 my @mods = &get_visible_module_infos($nocache);
6772 if (&get_product_name() eq 'webmin') {
6773 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6774 @mods = grep { $_->{'installed'} ne '0' } @mods;
6776 my %cats = &list_categories(\@mods);
6778 foreach my $c (keys %cats) {
6779 my $cat = { 'code' => $c || 'other',
6780 'desc' => $cats{$c} };
6781 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6784 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6785 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6787 # Add un-installed modules in magic category
6788 my $cat = { 'code' => 'unused',
6789 'desc' => $text{'main_unused'},
6791 'modules' => \@unmods };
6797 =head2 is_under_directory(directory, file)
6799 Returns 1 if the given file is under the specified directory, 0 if not.
6800 Symlinks are taken into account in the file to find it's 'real' location.
6803 sub is_under_directory
6805 my ($dir, $file) = @_;
6806 return 1 if ($dir eq "/");
6807 return 0 if ($file =~ /\.\./);
6808 my $ld = &resolve_links($dir);
6810 return &is_under_directory($ld, $file);
6812 my $lp = &resolve_links($file);
6814 return &is_under_directory($dir, $lp);
6816 return 0 if (length($file) < length($dir));
6817 return 1 if ($dir eq $file);
6819 return substr($file, 0, length($dir)) eq $dir;
6822 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6824 Given an absolute URL, returns the host, port, page and ssl flag components.
6825 Relative URLs can also be parsed, if the base information is provided.
6830 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6832 my $ssl = $1 eq 'https';
6833 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6839 elsif ($_[0] =~ /^\/\S*$/) {
6840 # A relative to the server URL
6841 return ($_[1], $_[2], $_[0], $_[4]);
6844 # A relative to the directory URL
6846 $page =~ s/[^\/]+$//;
6847 return ($_[1], $_[2], $page.$_[0], $_[4]);
6851 =head2 check_clicks_function
6853 Returns HTML for a JavaScript function called check_clicks that returns
6854 true when first called, but false subsequently. Useful on onClick for
6855 critical buttons. Deprecated, as this method of preventing duplicate actions
6859 sub check_clicks_function
6864 function check_clicks(form)
6871 for(i=0; i<form.length; i++)
6872 form.elements[i].disabled = true;
6881 =head2 load_entities_map
6883 Returns a hash ref containing mappings between HTML entities (like ouml) and
6884 ascii values (like 246). Mainly for internal use.
6887 sub load_entities_map
6889 if (!defined(%entities_map_cache)) {
6891 open(EMAP, "$root_directory/entities_map.txt");
6893 if (/^(\d+)\s+(\S+)/) {
6894 $entities_map_cache{$2} = $1;
6899 return \%entities_map_cache;
6902 =head2 entities_to_ascii(string)
6904 Given a string containing HTML entities like ö and 7, replace them
6905 with their ASCII equivalents.
6908 sub entities_to_ascii
6911 my $emap = &load_entities_map();
6912 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6913 $str =~ s/&#(\d+);/chr($1)/ge;
6917 =head2 get_product_name
6919 Returns either 'webmin' or 'usermin', depending on which program the current
6920 module is in. Useful for modules that can be installed into either.
6923 sub get_product_name
6925 return $gconfig{'product'} if (defined($gconfig{'product'}));
6926 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6931 Returns the character set for the current language, such as iso-8859-1.
6936 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6937 $current_lang_info->{'charset'} ?
6938 $current_lang_info->{'charset'} : $default_charset;
6942 =head2 get_display_hostname
6944 Returns the system's hostname for UI display purposes. This may be different
6945 from the actual hostname if you administrator has configured it so in the
6946 Webmin Configuration module.
6949 sub get_display_hostname
6951 if ($gconfig{'hostnamemode'} == 0) {
6952 return &get_system_hostname();
6954 elsif ($gconfig{'hostnamemode'} == 3) {
6955 return $gconfig{'hostnamedisplay'};
6958 my $h = $ENV{'HTTP_HOST'};
6960 if ($gconfig{'hostnamemode'} == 2) {
6961 $h =~ s/^(www|ftp|mail)\.//i;
6967 =head2 save_module_config([&config], [modulename])
6969 Saves the configuration for some module. The config parameter is an optional
6970 hash reference of names and values to save, which defaults to the global
6971 %config hash. The modulename parameter is the module to update the config
6972 file, which defaults to the current module.
6975 sub save_module_config
6977 my $c = $_[0] || { &get_module_variable('%config') };
6978 my $m = defined($_[1]) ? $_[1] : &get_module_name();
6979 &write_file("$config_directory/$m/config", $c);
6982 =head2 save_user_module_config([&config], [modulename])
6984 Saves the user's Usermin preferences for some module. The config parameter is
6985 an optional hash reference of names and values to save, which defaults to the
6986 global %userconfig hash. The modulename parameter is the module to update the
6987 config file, which defaults to the current module.
6990 sub save_user_module_config
6992 my $c = $_[0] || { &get_module_variable('%userconfig') };
6993 my $m = $_[1] || &get_module_name();
6994 my $ucd = $user_config_directory;
6996 my @uinfo = @remote_user_info ? @remote_user_info
6997 : getpwnam($remote_user);
6998 return if (!@uinfo || !$uinfo[7]);
6999 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7001 &write_file("$ucd/$m/config", $c);
7004 =head2 nice_size(bytes, [min])
7006 Converts a number of bytes into a number followed by a suffix like GB, MB
7007 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7008 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7013 my ($units, $uname);
7014 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7015 $units = 1024*1024*1024*1024;
7018 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7019 $units = 1024*1024*1024;
7022 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7026 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7034 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7036 return $sz." ".$uname;
7039 =head2 get_perl_path
7041 Returns the path to Perl currently in use, such as /usr/bin/perl.
7046 if (open(PERL, "$config_directory/perl-path")) {
7052 return $^X if (-x $^X);
7053 return &has_command("perl");
7056 =head2 get_goto_module([&mods])
7058 Returns the details of a module that the current user should be re-directed
7059 to after logging in, or undef if none. Useful for themes.
7064 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7065 if ($gconfig{'gotomodule'}) {
7066 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7067 return $goto if ($goto);
7069 if (@mods == 1 && $gconfig{'gotoone'}) {
7075 =head2 select_all_link(field, form, [text])
7077 Returns HTML for a 'Select all' link that uses Javascript to select
7078 multiple checkboxes with the same name. The parameters are :
7080 =item field - Name of the checkbox inputs.
7082 =item form - Index of the form on the page.
7084 =item text - Message for the link, defaulting to 'Select all'.
7089 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7090 my ($field, $form, $text) = @_;
7092 $text ||= $text{'ui_selall'};
7093 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7096 =head2 select_invert_link(field, form, text)
7098 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7099 selection on multiple checkboxes with the same name. The parameters are :
7101 =item field - Name of the checkbox inputs.
7103 =item form - Index of the form on the page.
7105 =item text - Message for the link, defaulting to 'Invert selection'.
7108 sub select_invert_link
7110 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7111 my ($field, $form, $text) = @_;
7113 $text ||= $text{'ui_selinv'};
7114 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7117 =head2 select_rows_link(field, form, text, &rows)
7119 Returns HTML for a link that uses Javascript to select rows with particular
7120 values for their checkboxes. The parameters are :
7122 =item field - Name of the checkbox inputs.
7124 =item form - Index of the form on the page.
7126 =item text - Message for the link, de
7128 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7131 sub select_rows_link
7133 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7134 my ($field, $form, $text, $rows) = @_;
7136 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7137 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7138 $js .= "return false;";
7139 return "<a href='#' onClick='$js'>$text</a>";
7142 =head2 check_pid_file(file)
7144 Given a pid file, returns the PID it contains if the process is running.
7149 open(PIDFILE, $_[0]) || return undef;
7150 my $pid = <PIDFILE>;
7152 $pid =~ /^\s*(\d+)/ || return undef;
7153 kill(0, $1) || return undef;
7159 Return the local os-specific library name to this module. For internal use only.
7164 my $mn = &get_module_name();
7165 my $md = &module_root_directory($mn);
7166 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7167 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7169 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7170 return "$mn-$gconfig{'os_type'}-lib.pl";
7172 elsif (-r "$md/$mn-generic-lib.pl") {
7173 return "$mn-generic-lib.pl";
7180 =head2 module_root_directory(module)
7182 Given a module name, returns its root directory. On a typical Webmin install,
7183 all modules are under the same directory - but it is theoretically possible to
7187 sub module_root_directory
7189 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7190 if (@root_directories > 1) {
7191 foreach my $r (@root_directories) {
7197 return "$root_directories[0]/$d";
7200 =head2 list_mime_types
7202 Returns a list of all known MIME types and their extensions, as a list of hash
7203 references with keys :
7205 =item type - The MIME type, like text/plain.
7207 =item exts - A list of extensions, like .doc and .avi.
7209 =item desc - A human-readable description for the MIME type.
7214 if (!@list_mime_types_cache) {
7216 open(MIME, "$root_directory/mime.types");
7220 if (s/#\s*(.*)$//g) {
7223 my ($type, @exts) = split(/\s+/);
7225 push(@list_mime_types_cache, { 'type' => $type,
7232 return @list_mime_types_cache;
7235 =head2 guess_mime_type(filename, [default])
7237 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7238 The optional default parameter sets a default type of use if none is found,
7239 which defaults to application/octet-stream.
7244 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7246 foreach my $t (&list_mime_types()) {
7247 foreach my $e (@{$t->{'exts'}}) {
7248 return $t->{'type'} if (lc($e) eq lc($ext));
7252 return @_ > 1 ? $_[1] : "application/octet-stream";
7255 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7257 Opens a file handle for writing to a temporary file, which will only be
7258 renamed over the real file when the handle is closed. This allows critical
7259 files like /etc/shadow to be updated safely, even if writing fails part way
7260 through due to lack of disk space. The parameters are :
7262 =item handle - File handle to open, as you would use in Perl's open function.
7264 =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.
7266 =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 $! with the error code.
7268 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7270 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7276 # Just getting a temp file
7277 if (!defined($main::open_tempfiles{$_[0]})) {
7278 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7279 my $dir = $1 || "/";
7280 my $tmp = "$dir/$2.webmintmp.$$";
7281 $main::open_tempfiles{$_[0]} = $tmp;
7282 push(@main::temporary_files, $tmp);
7284 return $main::open_tempfiles{$_[0]};
7288 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7289 $fh = &callers_package($fh);
7291 my %gaccess = &get_module_acl(undef, "");
7292 my $db = $gconfig{'debug_what_write'};
7293 if ($file =~ /\r|\n|\0/) {
7294 if ($noerror) { return 0; }
7295 else { &error("Filename contains invalid characters"); }
7297 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7298 # Read-only mode .. veto all writes
7299 print STDERR "vetoing write to $file\n";
7300 return open($fh, ">$null_file");
7302 elsif ($file =~ /^(>|>>|)nul$/i) {
7303 # Write to Windows null device
7304 &webmin_debug_log($1 eq ">" ? "WRITE" :
7305 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7307 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7308 # Writes to /dev/null or TTYs don't need to be handled
7309 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7310 return open($fh, $file);
7312 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7313 &webmin_debug_log("WRITE", $1) if ($db);
7314 # Over-writing a file, via a temp file
7316 $file = &translate_filename($file);
7318 # Open the link target instead
7319 $file = &resolve_links($file);
7322 # Cannot open a directory!
7323 if ($noerror) { return 0; }
7324 else { &error("Cannot write to directory $file"); }
7326 my $tmp = &open_tempfile($file);
7327 my $ex = open($fh, ">$tmp");
7328 if (!$ex && $! =~ /permission/i) {
7329 # Could not open temp file .. try opening actual file
7331 $ex = open($fh, ">$file");
7332 delete($main::open_tempfiles{$file});
7335 $main::open_temphandles{$fh} = $file;
7338 if (!$ex && !$noerror) {
7339 &error(&text("efileopen", $file, $!));
7343 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7344 # Just writing direct to a file
7345 &webmin_debug_log("WRITE", $1) if ($db);
7347 $file = &translate_filename($file);
7348 my @old_attributes = &get_clear_file_attributes($file);
7349 my $ex = open($fh, ">$file");
7350 &reset_file_attributes($file, \@old_attributes);
7351 $main::open_temphandles{$fh} = $file;
7352 if (!$ex && !$noerror) {
7353 &error(&text("efileopen", $file, $!));
7358 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7359 # Appending to a file .. nothing special to do
7360 &webmin_debug_log("APPEND", $1) if ($db);
7362 $file = &translate_filename($file);
7363 my @old_attributes = &get_clear_file_attributes($file);
7364 my $ex = open($fh, ">>$file");
7365 &reset_file_attributes($file, \@old_attributes);
7366 $main::open_temphandles{$fh} = $file;
7367 if (!$ex && !$noerror) {
7368 &error(&text("efileopen", $file, $!));
7373 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7374 # Read mode .. nothing to do here
7375 &webmin_debug_log("READ", $file) if ($db);
7376 $file = &translate_filename($file);
7377 return open($fh, $file);
7379 elsif ($file eq ">" || $file eq ">>") {
7380 my ($package, $filename, $line) = caller;
7381 if ($noerror) { return 0; }
7382 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7385 my ($package, $filename, $line) = caller;
7386 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7391 =head2 close_tempfile(file|handle)
7393 Copies a temp file to the actual file, assuming that all writes were
7394 successful. The handle must have been one passed to open_tempfile.
7400 my $fh = &callers_package($_[0]);
7402 if (defined($file = $main::open_temphandles{$fh})) {
7404 close($fh) || &error(&text("efileclose", $file, $!));
7405 delete($main::open_temphandles{$fh});
7406 return &close_tempfile($file);
7408 elsif (defined($main::open_tempfiles{$_[0]})) {
7410 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7411 my @st = stat($_[0]);
7412 if (&is_selinux_enabled() && &has_command("chcon")) {
7413 # Set original security context
7414 system("chcon --reference=".quotemeta($_[0]).
7415 " ".quotemeta($main::open_tempfiles{$_[0]}).
7416 " >/dev/null 2>&1");
7418 my @old_attributes = &get_clear_file_attributes($_[0]);
7419 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7421 # Set original permissions and ownership
7422 chmod($st[2], $_[0]);
7423 chown($st[4], $st[5], $_[0]);
7425 &reset_file_attributes($_[0], \@old_attributes);
7426 delete($main::open_tempfiles{$_[0]});
7427 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7428 if ($main::open_templocks{$_[0]}) {
7429 &unlock_file($_[0]);
7430 delete($main::open_templocks{$_[0]});
7435 # Must be closing a handle not associated with a file
7441 =head2 print_tempfile(handle, text, ...)
7443 Like the normal print function, but calls &error on failure. Useful when
7444 combined with open_tempfile, to ensure that a criticial file is never
7445 only partially written.
7450 my ($fh, @args) = @_;
7451 $fh = &callers_package($fh);
7452 (print $fh @args) || &error(&text("efilewrite",
7453 $main::open_temphandles{$fh} || $fh, $!));
7456 =head2 is_selinux_enabled
7458 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7461 sub is_selinux_enabled
7463 if (!defined($main::selinux_enabled_cache)) {
7465 if ($gconfig{'os_type'} !~ /-linux$/) {
7466 # Not on linux, so no way
7467 $main::selinux_enabled_cache = 0;
7469 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7470 # Use global config file
7471 $main::selinux_enabled_cache =
7472 $seconfig{'SELINUX'} eq 'disabled' ||
7473 !$seconfig{'SELINUX'} ? 0 : 1;
7476 # Use selinuxenabled command
7477 #$selinux_enabled_cache =
7478 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7479 $main::selinux_enabled_cache = 0;
7482 return $main::selinux_enabled_cache;
7485 =head2 get_clear_file_attributes(file)
7487 Finds file attributes that may prevent writing, clears them and returns them
7488 as a list. May call error. Mainly for internal use by open_tempfile and
7492 sub get_clear_file_attributes
7496 if ($gconfig{'chattr'}) {
7497 # Get original immutable bit
7498 my $out = &backquote_command(
7499 "lsattr ".quotemeta($file)." 2>/dev/null");
7501 $out =~ s/\s\S+\n//;
7502 @old_attributes = grep { $_ ne '-' } split(//, $out);
7504 if (&indexof("i", @old_attributes) >= 0) {
7505 my $err = &backquote_logged(
7506 "chattr -i ".quotemeta($file)." 2>&1");
7508 &error("Failed to remove immutable bit on ".
7513 return @old_attributes;
7516 =head2 reset_file_attributes(file, &attributes)
7518 Put back cleared attributes on some file. May call error. Mainly for internal
7519 use by close_tempfile.
7522 sub reset_file_attributes
7524 my ($file, $old_attributes) = @_;
7525 if (&indexof("i", @$old_attributes) >= 0) {
7526 my $err = &backquote_logged(
7527 "chattr +i ".quotemeta($file)." 2>&1");
7529 &error("Failed to restore immutable bit on ".
7535 =head2 cleanup_tempnames
7537 Remove all temporary files generated using transname. Typically only called
7538 internally when a Webmin script exits.
7541 sub cleanup_tempnames
7543 foreach my $t (@main::temporary_files) {
7546 @main::temporary_files = ( );
7549 =head2 open_lock_tempfile([handle], file, [no-error])
7551 Returns a temporary file for writing to some actual file, and also locks it.
7552 Effectively the same as calling lock_file and open_tempfile on the same file,
7553 but calls the unlock for you automatically when it is closed.
7556 sub open_lock_tempfile
7558 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7559 $fh = &callers_package($fh);
7560 my $lockfile = $file;
7561 $lockfile =~ s/^[^\/]*//;
7562 if ($lockfile =~ /^\//) {
7563 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7565 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7570 $main::end_exit_status ||= $?;
7571 if ($$ == $main::initial_process_id) {
7572 # Exiting from initial process
7573 &cleanup_tempnames();
7574 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7575 $main::debug_log_start_module eq &get_module_name()) {
7576 my $len = time() - $main::debug_log_start_time;
7577 &webmin_debug_log("STOP", "runtime=$len");
7578 $main::debug_log_start_time = 0;
7580 if (!$ENV{'SCRIPT_NAME'} &&
7581 $main::initial_module_name eq &get_module_name()) {
7582 # In a command-line script - call the real exit, so that the
7583 # exit status gets properly propogated. In some cases this
7584 # was not happening.
7585 exit($main::end_exit_status);
7590 =head2 month_to_number(month)
7592 Converts a month name like feb to a number like 1.
7597 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7600 =head2 number_to_month(number)
7602 Converts a number like 1 to a month name like Feb.
7607 return ucfirst($number_to_month_map{$_[0]});
7610 =head2 get_rbac_module_acl(user, module)
7612 Returns a hash reference of RBAC overrides ACLs for some user and module.
7613 May return undef if none exist (indicating access denied), or the string *
7614 if full access is granted.
7617 sub get_rbac_module_acl
7619 my ($user, $mod) = @_;
7620 eval "use Authen::SolarisRBAC";
7621 return undef if ($@);
7624 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7625 # Automagic webmin.modulename.admin authorization exists .. allow access
7627 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7628 %rv = ( 'noconfig' => 1 );
7635 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7639 my ($auths, $acls) = split(/\s+/, $_);
7640 my @auths = split(/,/, $auths);
7642 my ($merge) = ($acls =~ s/^\+//);
7644 if ($auths eq "*") {
7645 # These ACLs apply to all RBAC users.
7646 # Only if there is some that match a specific authorization
7647 # later will they be used though.
7650 # Check each of the RBAC authorizations
7651 foreach my $a (@auths) {
7652 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7657 $foundany++ if ($gotall);
7660 # Found an RBAC authorization - return the ACLs
7661 return "*" if ($acls eq "*");
7662 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7664 # Just add to current set
7665 foreach my $a (keys %acl) {
7676 return !$foundany ? undef : %rv ? \%rv : undef;
7679 =head2 supports_rbac([module])
7681 Returns 1 if RBAC client support is available, such as on Solaris.
7686 return 0 if ($gconfig{'os_type'} ne 'solaris');
7687 eval "use Authen::SolarisRBAC";
7690 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7695 =head2 use_rbac_module_acl(user, module)
7697 Returns 1 if some user should use RBAC to get permissions for a module
7700 sub use_rbac_module_acl
7702 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7703 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7704 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7705 my %access = &get_module_acl($u, $m, 1);
7706 return $access{'rbac'} ? 1 : 0;
7709 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7711 Runs some command, possibly feeding it input and capturing output to the
7712 give files or scalar references. The parameters are :
7714 =item command - Full command to run, possibly including shell meta-characters.
7716 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7718 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7720 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7722 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7724 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7729 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7730 if (&is_readonly_mode() && !$safe) {
7731 print STDERR "Vetoing command $_[0]\n";
7735 $cmd = &translate_command($cmd);
7737 # Use ` operator where possible
7738 if (!$stdin && ref($stdout) && !$stderr) {
7739 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7740 $$stdout = `$cmd 2>$null_file`;
7743 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7744 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7745 $$stdout = `$cmd 2>&1`;
7748 elsif (!$stdin && !$stdout && !$stderr) {
7749 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7750 return system("$cmd >$null_file 2>$null_file <$null_file");
7752 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7755 $| = 1; # needed on some systems to flush before forking
7756 pipe(EXECSTDINr, EXECSTDINw);
7757 pipe(EXECSTDOUTr, EXECSTDOUTw);
7758 pipe(EXECSTDERRr, EXECSTDERRw);
7760 if (!($pid = fork())) {
7764 open(STDIN, "<&EXECSTDINr");
7765 open(STDOUT, ">&EXECSTDOUTw");
7766 if (ref($stderr) && $stderr eq $stdout) {
7767 open(STDERR, ">&EXECSTDOUTw");
7770 open(STDERR, ">&EXECSTDERRw");
7777 my $fullcmd = "($cmd)";
7778 if ($stdin && !ref($stdin)) {
7779 $fullcmd .= " <$stdin";
7781 if ($stdout && !ref($stdout)) {
7782 $fullcmd .= " >$stdout";
7784 if ($stderr && !ref($stderr)) {
7785 if ($stderr eq $stdout) {
7786 $fullcmd .= " 2>&1";
7789 $fullcmd .= " 2>$stderr";
7792 if ($gconfig{'os_type'} eq 'windows') {
7796 exec("/bin/sh", "-c", $fullcmd);
7798 print "Exec failed : $!\n";
7805 # Feed input and capture output
7807 if ($stdin && ref($stdin)) {
7808 print EXECSTDINw $$stdin;
7811 if ($stdout && ref($stdout)) {
7813 while(<EXECSTDOUTr>) {
7818 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7820 while(<EXECSTDERRr>) {
7831 =head2 open_readfile(handle, file)
7833 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7834 exactly the same as Perl's open function.
7839 my ($fh, $file) = @_;
7840 $fh = &callers_package($fh);
7841 my $realfile = &translate_filename($file);
7842 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7843 return open($fh, "<".$realfile);
7846 =head2 open_execute_command(handle, command, output?, safe?)
7848 Runs some command, with the specified file handle set to either write to it if
7849 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7850 indicates if the command modifies the state of the system or not.
7853 sub open_execute_command
7855 my ($fh, $cmd, $mode, $safe) = @_;
7856 $fh = &callers_package($fh);
7857 my $realcmd = &translate_command($cmd);
7858 if (&is_readonly_mode() && !$safe) {
7859 # Don't actually run it
7860 print STDERR "vetoing command $cmd\n";
7863 return open($fh, ">$null_file");
7866 return open($fh, $null_file);
7870 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7871 if ($gconfig{'debug_what_cmd'});
7873 return open($fh, "| $cmd");
7875 elsif ($mode == 1) {
7876 return open($fh, "$cmd 2>$null_file |");
7878 elsif ($mode == 2) {
7879 return open($fh, "$cmd 2>&1 |");
7883 =head2 translate_filename(filename)
7885 Applies all relevant registered translation functions to a filename. Mostly
7886 for internal use, and typically does nothing.
7889 sub translate_filename
7891 my ($realfile) = @_;
7892 my @funcs = grep { $_->[0] eq &get_module_name() ||
7893 !defined($_->[0]) } @main::filename_callbacks;
7894 foreach my $f (@funcs) {
7896 $realfile = &$func($realfile, @{$f->[2]});
7901 =head2 translate_command(filename)
7903 Applies all relevant registered translation functions to a command. Mostly
7904 for internal use, and typically does nothing.
7907 sub translate_command
7910 my @funcs = grep { $_->[0] eq &get_module_name() ||
7911 !defined($_->[0]) } @main::command_callbacks;
7912 foreach my $f (@funcs) {
7914 $realcmd = &$func($realcmd, @{$f->[2]});
7919 =head2 register_filename_callback(module|undef, &function, &args)
7921 Registers some function to be called when the specified module (or all
7922 modules) tries to open a file for reading and writing. The function must
7923 return the actual file to open. This allows you to override which files
7924 other code actually operates on, via the translate_filename function.
7927 sub register_filename_callback
7929 my ($mod, $func, $args) = @_;
7930 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7933 =head2 register_command_callback(module|undef, &function, &args)
7935 Registers some function to be called when the specified module (or all
7936 modules) tries to execute a command. The function must return the actual
7937 command to run. This allows you to override which commands other other code
7938 actually runs, via the translate_command function.
7941 sub register_command_callback
7943 my ($mod, $func, $args) = @_;
7944 push(@main::command_callbacks, [ $mod, $func, $args ]);
7947 =head2 capture_function_output(&function, arg, ...)
7949 Captures output that some function prints to STDOUT, and returns it. Useful
7950 for functions outside your control that print data when you really want to
7951 manipulate it before output.
7954 sub capture_function_output
7956 my ($func, @args) = @_;
7957 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
7958 my $old = select(SOCKET1);
7959 my @rv = &$func(@args);
7968 return wantarray ? ($out, \@rv) : $out;
7971 =head2 capture_function_output_tempfile(&function, arg, ...)
7973 Behaves the same as capture_function_output, but uses a temporary file
7974 to avoid buffer full problems.
7977 sub capture_function_output_tempfile
7979 my ($func, @args) = @_;
7980 my $temp = &transname();
7981 open(BUFFER, ">$temp");
7982 my $old = select(BUFFER);
7983 my @rv = &$func(@args);
7986 my $out = &read_file_contents($temp);
7987 &unlink_file($temp);
7988 return wantarray ? ($out, \@rv) : $out;
7991 =head2 modules_chooser_button(field, multiple, [form])
7993 Returns HTML for a button for selecting one or many Webmin modules.
7994 field - Name of the HTML field to place the module names into.
7995 multiple - Set to 1 if multiple modules can be selected.
7996 form - Index of the form on the page.
7999 sub modules_chooser_button
8001 return &theme_modules_chooser_button(@_)
8002 if (defined(&theme_modules_chooser_button));
8003 my $form = defined($_[2]) ? $_[2] : 0;
8004 my $w = $_[1] ? 700 : 500;
8006 if ($_[1] && $gconfig{'db_sizemodules'}) {
8007 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8009 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8010 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8012 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";
8015 =head2 substitute_template(text, &hash)
8017 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8018 the text replaces it with the value of the hash key foo. Also supports blocks
8019 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8020 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8023 sub substitute_template
8025 # Add some extra fixed parameters to the hash
8026 my %hash = %{$_[1]};
8027 $hash{'hostname'} = &get_system_hostname();
8028 $hash{'webmin_config'} = $config_directory;
8029 $hash{'webmin_etc'} = $config_directory;
8030 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8031 $hash{'webmin_var'} = $var_directory;
8033 # Add time-based parameters, for use in DNS
8034 $hash{'current_time'} = time();
8035 my @tm = localtime($hash{'current_time'});
8036 $hash{'current_year'} = $tm[5]+1900;
8037 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8038 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8039 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8040 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8041 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8043 # Actually do the substition
8045 foreach my $s (keys %hash) {
8046 next if ($s eq ''); # Prevent just $ from being subbed
8049 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8050 $rv =~ s/\$\Q$us\E/$sv/g;
8052 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8053 # and ${IF}..${ENDIF} with value
8054 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8055 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8057 # Replace $IF..$ELSE..$ENDIF block with first value,
8058 # and $IF..$ENDIF with value
8059 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8060 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8062 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8063 # matching, nothing if not
8064 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8065 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8067 # Replace $IFEQ..$ENDIFEQ block with first value if
8068 # matching, nothing if not
8069 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8070 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8073 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8074 # and ${IF}..${ENDIF} with nothing
8075 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8076 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8078 # Replace $IF..$ELSE..$ENDIF block with second value,
8079 # and $IF..$ENDIF with nothing
8080 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8081 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8083 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8084 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8085 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8089 # Now assume any $IF blocks whose variables are not present in the hash
8090 # evaluate to false.
8091 # $IF...$ELSE x $ENDIF => x
8092 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8093 # $IF...x...$ENDIF => (nothing)
8094 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8095 # ${var} => (nothing)
8096 $rv =~ s/\$\{[A-Z]+\}//g;
8101 =head2 running_in_zone
8103 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8104 disable module and features that are not appropriate, like those that modify
8105 mounted filesystems.
8110 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8111 $gconfig{'os_version'} < 10);
8112 my $zn = `zonename 2>$null_file`;
8114 return $zn && $zn ne "global";
8117 =head2 running_in_vserver
8119 Returns 1 if the current Webmin instance is running in a Linux VServer.
8120 Used to disable modules and features that are not appropriate.
8123 sub running_in_vserver
8125 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8128 open(MTAB, "/etc/mtab");
8130 my ($dev, $mp) = split(/\s+/, $_);
8131 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8140 =head2 running_in_xen
8142 Returns 1 if Webmin is running inside a Xen instance, by looking
8143 at /proc/xen/capabilities.
8148 return 0 if (!-r "/proc/xen/capabilities");
8149 my $cap = &read_file_contents("/proc/xen/capabilities");
8150 return $cap =~ /control_d/ ? 0 : 1;
8153 =head2 running_in_openvz
8155 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8156 at /proc/vz/veinfo for a non-zero line.
8159 sub running_in_openvz
8161 return 0 if (!-r "/proc/vz/veinfo");
8162 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8163 return 0 if (!$lref || !@$lref);
8164 foreach my $l (@$lref) {
8166 my @ll = split(/\s+/, $l);
8167 return 0 if ($ll[0] eq '0');
8172 =head2 list_categories(&modules, [include-empty])
8174 Returns a hash mapping category codes to names, including any custom-defined
8175 categories. The modules parameter must be an array ref of module hash objects,
8176 as returned by get_all_module_infos.
8181 my ($mods, $empty) = @_;
8182 my (%cats, %catnames);
8183 &read_file("$config_directory/webmin.catnames", \%catnames);
8184 foreach my $o (@lang_order_list) {
8185 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8190 foreach my $m (@$mods) {
8191 my $c = $m->{'category'};
8192 next if ($cats{$c});
8193 if (defined($catnames{$c})) {
8194 $cats{$c} = $catnames{$c};
8196 elsif ($text{"category_$c"}) {
8197 $cats{$c} = $text{"category_$c"};
8200 # try to get category name from module ..
8201 my %mtext = &load_language($m->{'dir'});
8202 if ($mtext{"category_$c"}) {
8203 $cats{$c} = $mtext{"category_$c"};
8206 $c = $m->{'category'} = "";
8207 $cats{$c} = $text{"category_$c"};
8214 =head2 is_readonly_mode
8216 Returns 1 if the current user is in read-only mode, and thus all writes
8217 to files and command execution should fail.
8220 sub is_readonly_mode
8222 if (!defined($main::readonly_mode_cache)) {
8223 my %gaccess = &get_module_acl(undef, "");
8224 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8226 return $main::readonly_mode_cache;
8229 =head2 command_as_user(user, with-env?, command, ...)
8231 Returns a command to execute some command as the given user, using the
8232 su statement. If on Linux, the /bin/sh shell is forced in case the user
8233 does not have a valid shell. If with-env is set to 1, the -s flag is added
8234 to the su command to read the user's .profile or .bashrc file.
8239 my ($user, $env, @args) = @_;
8240 my @uinfo = getpwnam($user);
8241 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8242 # User shell doesn't appear to be valid
8243 if ($gconfig{'os_type'} =~ /-linux$/) {
8244 # Use -s /bin/sh to force it
8245 $shellarg = " -s /bin/sh";
8247 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8248 $gconfig{'os_type'} eq 'solaris' &&
8249 $gconfig{'os_version'} >= 11 ||
8250 $gconfig{'os_type'} eq 'macos') {
8251 # Use -m and force /bin/sh
8252 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8256 my $rv = "su".($env ? " -" : "").$shellarg.
8257 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8261 =head2 list_osdn_mirrors(project, file)
8263 This function is now deprecated in favor of letting sourceforge just
8264 redirect to the best mirror, and now just returns their primary download URL.
8267 sub list_osdn_mirrors
8269 my ($project, $file) = @_;
8270 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8272 'mirror' => 'downloads' } );
8275 =head2 convert_osdn_url(url)
8277 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8278 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8279 to a real URL on the sourceforge download redirector.
8282 sub convert_osdn_url
8285 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8286 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8287 # Always use the Sourceforge mail download URL, which does
8288 # a location-based redirect for us
8289 my ($project, $file) = ($1, $2);
8290 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8292 return wantarray ? ( $url, 0 ) : $url;
8295 # Some other source .. don't change
8296 return wantarray ? ( $url, 2 ) : $url;
8300 =head2 get_current_dir
8302 Returns the directory the current process is running in.
8308 if ($gconfig{'os_type'} eq 'windows') {
8321 =head2 supports_users
8323 Returns 1 if the current OS supports Unix user concepts and functions like
8324 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8330 return $gconfig{'os_type'} ne 'windows';
8333 =head2 supports_symlinks
8335 Returns 1 if the current OS supports symbolic and hard links. This will not
8336 be the case on Windows.
8339 sub supports_symlinks
8341 return $gconfig{'os_type'} ne 'windows';
8344 =head2 quote_path(path)
8346 Returns a path with safe quoting for the current operating system.
8352 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8353 # Windows only supports "" style quoting
8357 return quotemeta($path);
8361 =head2 get_windows_root
8363 Returns the base windows system directory, like c:/windows.
8366 sub get_windows_root
8368 if ($ENV{'SystemRoot'}) {
8369 my $rv = $ENV{'SystemRoot'};
8374 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8378 =head2 read_file_contents(file)
8380 Given a filename, returns its complete contents as a string. Effectively
8381 the same as the Perl construct `cat file`.
8384 sub read_file_contents
8386 &open_readfile(FILE, $_[0]) || return undef;
8393 =head2 unix_crypt(password, salt)
8395 Performs Unix encryption on a password, using the built-in crypt function or
8396 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8397 must be either an already-hashed password, or a two-character alpha-numeric
8403 my ($pass, $salt) = @_;
8404 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8405 my $rv = eval "crypt(\$pass, \$salt)";
8407 return $rv if ($rv && !$@);
8408 eval "use Crypt::UnixCrypt";
8410 return Crypt::UnixCrypt::crypt($pass, $salt);
8413 &error("Failed to encrypt password : $err");
8417 =head2 split_quoted_string(string)
8419 Given a string like I<foo "bar baz" quux>, returns the array :
8423 sub split_quoted_string
8427 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8428 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8429 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8436 =head2 write_to_http_cache(url, file|&data)
8438 Updates the Webmin cache with the contents of the given file, possibly also
8439 clearing out old data. Mainly for internal use by http_download.
8442 sub write_to_http_cache
8444 my ($url, $file) = @_;
8445 return 0 if (!$gconfig{'cache_size'});
8447 # Don't cache downloads that look dynamic
8448 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8452 # Check if the current module should do caching
8453 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8454 # Caching all except some modules
8455 my @mods = split(/\s+/, $1);
8456 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8458 elsif ($gconfig{'cache_mods'}) {
8459 # Only caching some modules
8460 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8461 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8467 $size = length($$file);
8470 my @st = stat($file);
8474 if ($size > $gconfig{'cache_size'}) {
8475 # Bigger than the whole cache - so don't save it
8480 $cfile = "$main::http_cache_directory/$cfile";
8482 # See how much we have cached currently, clearing old files
8484 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8485 opendir(CACHEDIR, $main::http_cache_directory);
8486 foreach my $f (readdir(CACHEDIR)) {
8487 next if ($f eq "." || $f eq "..");
8488 my $path = "$main::http_cache_directory/$f";
8489 my @st = stat($path);
8490 if ($gconfig{'cache_days'} &&
8491 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8492 # This file is too old .. trash it
8497 push(@cached, [ $path, $st[7], $st[9] ]);
8501 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8502 while($total+$size > $gconfig{'cache_size'} && @cached) {
8503 # Cache is too big .. delete some files until the new one will fit
8504 unlink($cached[0]->[0]);
8505 $total -= $cached[0]->[1];
8509 # Finally, write out the new file
8511 &open_tempfile(CACHEFILE, ">$cfile");
8512 &print_tempfile(CACHEFILE, $$file);
8513 &close_tempfile(CACHEFILE);
8516 my ($ok, $err) = ©_source_dest($file, $cfile);
8522 =head2 check_in_http_cache(url)
8524 If some URL is in the cache and valid, return the filename for it. Mainly
8525 for internal use by http_download.
8528 sub check_in_http_cache
8531 return undef if (!$gconfig{'cache_size'});
8533 # Check if the current module should do caching
8534 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8535 # Caching all except some modules
8536 my @mods = split(/\s+/, $1);
8537 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8539 elsif ($gconfig{'cache_mods'}) {
8540 # Only caching some modules
8541 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8542 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8547 $cfile = "$main::http_cache_directory/$cfile";
8548 my @st = stat($cfile);
8549 return undef if (!@st || !$st[7]);
8550 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8555 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8560 =head2 supports_javascript
8562 Returns 1 if the current browser is assumed to support javascript.
8565 sub supports_javascript
8567 if (defined(&theme_supports_javascript)) {
8568 return &theme_supports_javascript();
8570 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8573 =head2 get_module_name
8575 Returns the name of the Webmin module that called this function. For internal
8576 use only by other API functions.
8581 return &get_module_variable('$module_name');
8584 =head2 get_module_variable(name, [ref])
8586 Returns the value of some variable which is set in the caller's context, if
8587 using the new WebminCore package. For internal use only.
8590 sub get_module_variable
8592 my ($v, $wantref) = @_;
8593 my $slash = $wantref ? "\\" : "";
8594 my $thispkg = &web_libs_package();
8595 if ($thispkg eq 'WebminCore') {
8596 my ($vt, $vn) = split('', $v, 2);
8598 for(my $i=0; ($callpkg) = caller($i); $i++) {
8599 last if ($callpkg ne $thispkg);
8601 return eval "${slash}${vt}${callpkg}::${vn}";
8603 return eval "${slash}${v}";
8606 =head2 clear_time_locale()
8608 Temporarily force the locale to C, until reset_time_locale is called. This is
8609 useful if your code is going to call C<strftime> from the POSIX package, and
8610 you want to ensure that the output is in a consistent format.
8613 sub clear_time_locale
8615 if ($main::clear_time_locale_count == 0) {
8618 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8619 POSIX::setlocale(POSIX::LC_TIME, "C");
8622 $main::clear_time_locale_count++;
8625 =head2 reset_time_locale()
8627 Revert the locale to whatever it was before clear_time_locale was called
8630 sub reset_time_locale
8632 if ($main::clear_time_locale_count == 1) {
8634 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8635 $main::clear_time_locale_old = undef;
8638 $main::clear_time_locale_count--;
8641 =head2 callers_package(filehandle)
8643 Convert a non-module filehandle like FOO to one qualified with the
8644 caller's caller's package, like fsdump::FOO. For internal use only.
8650 my $callpkg = (caller(1))[0];
8651 my $thispkg = &web_libs_package();
8652 if (!ref($fh) && $fh !~ /::/ &&
8653 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8654 $fh = $callpkg."::".$fh;
8659 =head2 web_libs_package()
8661 Returns the package this code is in. We can't always trust __PACKAGE__. For
8665 sub web_libs_package
8667 if ($called_from_webmin_core) {
8668 return "WebminCore";
8673 $done_web_lib_funcs = 1;