1 =head1 web-lib-funcs.pl
3 Common functions for Webmin CGI scripts. This file gets in-directly included
4 by all scripts that use web-lib.pl.
9 ui_print_header(undef, 'My Module', '');
10 print 'This is Webmin version ',get_webmin_version(),'<p>\n';
18 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
19 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
20 %done_foreign_require $webmin_feedback_address
21 $user_skill_level $pragma_no_cache $foreign_args);
23 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
25 Fill the given hash reference with name=value pairs from a file. The required
28 =item file - The file to head, which must be text with each line like name=value
30 =item hash - The hash reference to add values read from the file to.
32 =item order - If given, an array reference to add names to in the order they were read
34 =item lowercase - If set to 1, names are converted to lower case
36 =item split-char - If set, names and values are split on this character instead of =
42 my $split = defined($_[4]) ? $_[4] : "=";
43 my $realfile = &translate_filename($_[0]);
44 &open_readfile(ARFILE, $_[0]) || return 0;
47 my $hash = index($_, "#");
48 my $eq = index($_, $split);
49 if ($hash != 0 && $eq >= 0) {
50 my $n = substr($_, 0, $eq);
51 my $v = substr($_, $eq+1);
53 $_[1]->{$_[3] ? lc($n) : $n} = $v;
54 push(@{$_[2]}, $n) if ($_[2]);
58 $main::read_file_missing{$realfile} = 0; # It exists now
59 if (defined($main::read_file_cache{$realfile})) {
60 %{$main::read_file_cache{$realfile}} = %{$_[1]};
65 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
67 Like read_file, but reads from an in-memory cache if the file has already been
68 read in this Webmin script. Recommended, as it behaves exactly the same as
69 read_file, but can be much faster.
74 my $realfile = &translate_filename($_[0]);
75 if (defined($main::read_file_cache{$realfile})) {
77 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
80 elsif ($main::read_file_missing{$realfile}) {
81 # Doesn't exist, so don't re-try read
85 # Actually read the file
87 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
88 %{$main::read_file_cache{$realfile}} = %d;
89 %{$_[1]} = ( %{$_[1]}, %d );
93 # Flag as non-existant
94 $main::read_file_missing{$realfile} = 1;
100 =head2 write_file(file, &hash, [join-char])
102 Write out the contents of a hash as name=value lines. The parameters are :
104 =item file - Full path to write to
106 =item hash - A hash reference containing names and values to output
108 =item join-char - If given, names and values are separated by this instead of =
114 my $join = defined($_[2]) ? $_[2] : "=";
115 my $realfile = &translate_filename($_[0]);
116 &read_file($_[0], \%old, \@order);
117 &open_tempfile(ARFILE, ">$_[0]");
118 foreach $k (@order) {
119 if (exists($_[1]->{$k})) {
120 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
121 &error(&text("efilewrite", $realfile, $!));
124 foreach $k (keys %{$_[1]}) {
125 if (!exists($old{$k})) {
126 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
127 &error(&text("efilewrite", $realfile, $!));
130 &close_tempfile(ARFILE);
131 if (defined($main::read_file_cache{$realfile})) {
132 %{$main::read_file_cache{$realfile}} = %{$_[1]};
134 if (defined($main::read_file_missing{$realfile})) {
135 $main::read_file_missing{$realfile} = 0;
139 =head2 html_escape(string)
141 Converts &, < and > codes in text to HTML entities, and returns the new string.
142 This should be used when including data read from other sources in HTML pages.
151 $tmp =~ s/\"/"/g;
152 $tmp =~ s/\'/'/g;
157 =head2 quote_escape(string, [only-quote])
159 Converts ' and " characters in a string into HTML entities, and returns it.
160 Useful for outputing HTML tag values.
165 my ($tmp, $only) = @_;
166 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
167 # convert &, unless it is part of &#nnn; or &foo;
168 $tmp =~ s/&([^#])/&$1/g;
170 $tmp =~ s/&$/&/g;
171 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
172 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
176 =head2 tempname([filename])
178 Returns a mostly random temporary file name, typically under the /tmp/.webmin
179 directory. If filename is given, this will be the base name used. Otherwise
180 a unique name is selected randomly.
185 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
186 $gconfig{'tempdir_'.&get_module_name()} :
187 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
188 $ENV{'TEMP'} ? $ENV{'TEMP'} :
189 $ENV{'TMP'} ? $ENV{'TMP'} :
190 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
191 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
192 "$remote_user_info[7]/.tmp" :
193 @remote_user_info ? $tmp_base."-".$remote_user :
194 $< != 0 ? $tmp_base."-".getpwuid($<) :
196 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
197 # On Windows system, just create temp dir if missing
199 mkdir($tmp_dir, 0755) ||
200 &error("Failed to create temp directory $tmp_dir : $!");
204 # On Unix systems, need to make sure temp dir is valid
206 while($tries++ < 10) {
207 my @st = lstat($tmp_dir);
208 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
210 unlink($tmp_dir) || rmdir($tmp_dir) ||
211 system("/bin/rm -rf ".quotemeta($tmp_dir));
213 mkdir($tmp_dir, 0755) || next;
214 chown($<, $(, $tmp_dir);
215 chmod(0755, $tmp_dir);
218 my @st = lstat($tmp_dir);
219 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
223 if (defined($_[0]) && $_[0] !~ /\.\./) {
224 $rv = "$tmp_dir/$_[0]";
227 $main::tempfilecount++;
229 $rv = $tmp_dir."/".int(rand(1000000))."_".
230 $main::tempfilecount."_".$scriptname;
235 =head2 transname([filename])
237 Behaves exactly like tempname, but records the temp file for deletion when the
238 current Webmin script process exits.
243 my $rv = &tempname(@_);
244 push(@main::temporary_files, $rv);
248 =head2 trunc(string, maxlen)
250 Truncates a string to the shortest whole word less than or equal to the
251 given width. Useful for word wrapping.
256 if (length($_[0]) <= $_[1]) {
259 my $str = substr($_[0],0,$_[1]);
268 =head2 indexof(string, value, ...)
270 Returns the index of some value in an array of values, or -1 if it was not
276 for(my $i=1; $i <= $#_; $i++) {
277 if ($_[$i] eq $_[0]) { return $i - 1; }
282 =head2 indexoflc(string, value, ...)
284 Like indexof, but does a case-insensitive match
289 my $str = lc(shift(@_));
290 my @arr = map { lc($_) } @_;
291 return &indexof($str, @arr);
294 =head2 sysprint(handle, [string]+)
296 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
297 as a replacement for print when writing to pipes or sockets.
302 my $fh = &callers_package($_[0]);
303 my $str = join('', @_[1..$#_]);
304 syswrite $fh, $str, length($str);
307 =head2 check_ipaddress(ip)
309 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
314 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
315 $1 >= 0 && $1 <= 255 &&
316 $2 >= 0 && $2 <= 255 &&
317 $3 >= 0 && $3 <= 255 &&
318 $4 >= 0 && $4 <= 255;
321 =head2 check_ip6address(ip)
323 Check if some IPv6 address is properly formatted, and returns 1 if so.
328 my @blocks = split(/:/, $_[0]);
329 return 0 if (@blocks == 0 || @blocks > 8);
331 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
332 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
333 # value is in [0;128].
335 my $where = index($blocks[$ib],"/");
338 my $b = substr($blocks[$ib],0,$where);
339 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
343 # The netmask must take its value in [0;128]
344 return 0 if ($m <0 || $m >128);
346 # Check the different blocks of the address : 16 bits block in hexa notation.
347 # Possibility of 1 empty block or 2 if the address begins with "::".
350 foreach $b (@blocks) {
351 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
352 $empty++ if ($b eq "");
354 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
360 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
362 Prints HTML for an icon image. The parameters are :
364 =item image - URL for the image, like images/foo.gif
366 =item title - Text to appear under the icon
368 =item link - Optional destination for the icon's link
370 =item href - Other HTML attributes to be added to the <a href> for the link
372 =item width - Optional width of the icon
374 =item height - Optional height of the icon
376 =item before-title - HTML to appear before the title link, but which is not actually in the link
378 =item after-title - HTML to appear after the title link, but which is not actually in the link
383 &load_theme_library();
384 if (defined(&theme_generate_icon)) {
385 &theme_generate_icon(@_);
388 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
389 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
390 if ($tconfig{'noicons'}) {
392 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
395 print "$_[6]$_[1]$_[7]\n";
399 print "<table border><tr><td width=48 height=48>\n",
400 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
401 "$w $h></a></td></tr></table>\n";
402 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
405 print "<table border><tr><td width=48 height=48>\n",
406 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
407 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
413 Converts a string to a form ok for putting in a URL, using % escaping.
419 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
423 =head2 un_urlize(string)
425 Converts a URL-encoded string to it's original contents - the reverse of the
433 $rv =~ s/%(..)/pack("c",hex($1))/ge;
437 =head2 include(filename)
439 Read and output the contents of the given file.
445 open(INCLUDE, &translate_filename($_[0])) || return 0;
453 =head2 copydata(in-handle, out-handle)
455 Read from one file handle and write to another, until there is no more to read.
461 $in = &callers_package($in);
462 $out = &callers_package($out);
464 while(read($in, $buf, 1024) > 0) {
465 (print $out $buf) || return 0;
470 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
472 Read data submitted via a POST request using the multipart/form-data coding,
473 and store it in the global %in hash. The optional parameters are :
475 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
477 =item cbfunc - A function reference to call after reading each block of data.
479 =item cbargs - Additional parameters to the callback function.
484 my ($max, $cbfunc, $cbargs) = @_;
485 my ($boundary, $line, $foo, $name, $got, $file);
486 my $err = &text('readparse_max', $max);
487 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
488 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
491 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
493 <STDIN>; # skip first boundary
496 # Read section headers
500 $got += length($line);
501 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
502 if ($max && $got > $max) {
507 if ($line =~ /^(\S+):\s*(.*)$/) {
508 $header{$lastheader = lc($1)} = $2;
510 elsif ($line =~ /^\s+(.*)$/) {
511 $header{$lastheader} .= $line;
515 # Parse out filename and type
516 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
518 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
523 $foo = $name . "_$1";
530 &error($text{'readparse_cdheader'});
532 if ($header{'content-type'} =~ /^([^\s;]+)/) {
533 $foo = $name . "_content_type";
536 $file = $in{$name."_filename"};
539 $in{$name} .= "\0" if (defined($in{$name}));
542 $got += length($line);
543 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
545 if ($max && $got > $max) {
546 #print STDERR "over limit of $max\n";
551 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
556 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
557 if (index($line, $boundary) != -1) { last; }
560 chop($in{$name}); chop($in{$name});
561 if (index($line,"$boundary--") != -1) { last; }
563 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
566 =head2 ReadParse([&hash], [method], [noplus])
568 Fills the given hash reference with CGI parameters, or uses the global hash
569 %in if none is given. Also sets the global variables $in and @in. The other
572 =item method - For use of this HTTP method, such as GET
574 =item noplus - Don't convert + in parameters to spaces.
579 my $a = $_[0] || \%in;
581 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
583 if ($meth eq 'POST') {
584 my $clen = $ENV{'CONTENT_LENGTH'};
585 &read_fully(STDIN, \$in, $clen) == $clen ||
586 &error("Failed to read POST input : $!");
588 if ($ENV{'QUERY_STRING'}) {
589 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
590 else { $in = $ENV{'QUERY_STRING'}; }
592 @in = split(/\&/, $in);
593 foreach my $i (@in) {
594 my ($k, $v) = split(/=/, $i, 2);
599 $k =~ s/%(..)/pack("c",hex($1))/ge;
600 $v =~ s/%(..)/pack("c",hex($1))/ge;
601 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
605 =head2 read_fully(fh, &buffer, length)
607 Read data from some file handle up to the given length, even in the face
608 of partial reads. Reads the number of bytes read. Stores received data in the
609 string pointed to be the buffer reference.
614 my ($fh, $buf, $len) = @_;
615 $fh = &callers_package($fh);
618 my $r = read(STDIN, $$buf, $len-$got, $got);
625 =head2 read_parse_mime_callback(size, totalsize, upload-id)
627 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
628 the file on every 1% change though. For internal use by the upload progress
632 sub read_parse_mime_callback
634 my ($size, $totalsize, $filename, $id) = @_;
635 return if ($gconfig{'no_upload_tracker'});
638 # Create the upload tracking directory - if running as non-root, this has to
639 # be under the user's home
642 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
643 $vardir = "$uinfo[7]/.tmp";
646 $vardir = $ENV{'WEBMIN_VAR'};
649 &make_dir($vardir, 0755);
652 # Remove any upload.* files more than 1 hour old
653 if (!$main::read_parse_mime_callback_flushed) {
655 opendir(UPDIR, $vardir);
656 foreach my $f (readdir(UPDIR)) {
657 next if ($f !~ /^upload\./);
658 my @st = stat("$vardir/$f");
659 if ($st[9] < $now-3600) {
660 unlink("$vardir/$f");
664 $main::read_parse_mime_callback_flushed++;
667 # Only update file once per percent
668 my $upfile = "$vardir/upload.$id";
669 if ($totalsize && $size >= 0) {
670 my $pc = int(100 * $size / $totalsize);
671 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
674 $main::read_parse_mime_callback_pc{$upfile} = $pc;
678 &open_tempfile(UPFILE, ">$upfile");
679 print UPFILE $size,"\n";
680 print UPFILE $totalsize,"\n";
681 print UPFILE $filename,"\n";
682 &close_tempfile(UPFILE);
685 =head2 read_parse_mime_javascript(upload-id, [&fields])
687 Returns an onSubmit= Javascript statement to popup a window for tracking
688 an upload with the given ID. For internal use by the upload progress tracker.
691 sub read_parse_mime_javascript
693 my ($id, $fields) = @_;
694 return "" if ($gconfig{'no_upload_tracker'});
695 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
697 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
698 return "onSubmit='if ($if) { $opener }'";
701 return "onSubmit='$opener'";
705 =head2 PrintHeader(charset)
707 Outputs the HTTP headers for an HTML page. The optional charset parameter
708 can be used to set a character set. Normally this function is not called
709 directly, but is rather called by ui_print_header or header.
714 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
715 print "pragma: no-cache\n";
716 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
717 print "Cache-Control: no-store, no-cache, must-revalidate\n";
718 print "Cache-Control: post-check=0, pre-check=0\n";
720 if (defined($_[0])) {
721 print "Content-type: text/html; Charset=$_[0]\n\n";
724 print "Content-type: text/html\n\n";
728 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
730 Outputs a Webmin HTML page header with a title, including HTTP headers. The
733 =item title - The text to show at the top of the page
735 =item image - An image to show instead of the title text. This is typically left blank.
737 =item help - If set, this is the name of a help page that will be linked to in the title.
739 =item config - If set to 1, the title will contain a link to the module's config page.
741 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
743 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
745 =item rightside - HTML to be shown on the right-hand side of the title. Can contain multiple lines, separated by <br>. Typically this is used for links to stop, start or restart servers.
747 =item head-stuff - HTML to be included in the <head> section of the page.
749 =item body-stuff - HTML attributes to be include in the <body> tag.
751 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
756 return if ($main::done_webmin_header++);
758 my $charset = defined($main::force_charset) ? $main::force_charset
760 &PrintHeader($charset);
761 &load_theme_library();
762 if (defined(&theme_header)) {
763 $module_name = &get_module_name();
767 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
770 if (defined(&theme_prehead)) {
774 print "<meta http-equiv=\"Content-Type\" ",
775 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
778 my $title = &get_html_title($_[0]);
779 print "<title>$title</title>\n";
780 print $_[7] if ($_[7]);
781 print &get_html_status_line(0);
783 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
784 if ($tconfig{'headinclude'}) {
786 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
793 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
794 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
795 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
796 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
797 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
798 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
799 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
801 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
803 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
804 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
805 if (defined(&theme_prebody)) {
808 my $hostname = &get_display_hostname();
809 my $version = &get_webmin_version();
810 my $prebody = $tconfig{'prebody'};
812 $prebody =~ s/%HOSTNAME%/$hostname/g;
813 $prebody =~ s/%VERSION%/$version/g;
814 $prebody =~ s/%USER%/$remote_user/g;
815 $prebody =~ s/%OS%/$os_type $os_version/g;
818 if ($tconfig{'prebodyinclude'}) {
820 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
827 print $tconfig{'preheader'};
828 my %this_module_info = &get_module_info(&get_module_name());
829 print "<table class='header' width=100%><tr>\n";
830 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
831 print "<td id='headln1' colspan=3 align=center>\n";
832 print &get_html_status_line(1);
833 print "</td></tr> <tr>\n";
835 print "<td id='headln2l' width=15% valign=top align=left>";
836 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
837 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
838 "$text{'header_servers'}</a><br>\n";
840 if (!$_[5] && !$tconfig{'noindex'}) {
841 my @avail = &get_available_module_infos(1);
842 my $nolo = $ENV{'ANONYMOUS_USER'} ||
843 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
844 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
845 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
847 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
848 "$text{'main_logout'}</a><br>";
850 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
851 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
852 "$text{'main_switch'}</a><br>";
854 elsif (!$gconfig{'gotoone'} || @avail > 1) {
855 print "<a href='$gconfig{'webprefix'}/?cat=",
856 $this_module_info{'category'},
857 "'>$text{'header_webmin'}</a><br>\n";
860 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
861 my $idx = $this_module_info{'index_link'};
862 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
863 my $mt = $module_index_name || $text{'header_module'};
864 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
866 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
867 !$tconfig{'nohelp'}) {
868 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
871 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
872 !$tconfig{'nohelp'}) {
873 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
876 my %access = &get_module_acl();
877 if (!$access{'noconfig'} && !$config{'noprefs'}) {
878 my $cprog = $user_module_config_directory ?
879 "uconfig.cgi" : "config.cgi";
880 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
881 &get_module_name()."\">",
882 $text{'header_config'},"</a><br>\n";
887 # Title is a single image
888 print "<td id='headln2c' align=center width=70%>",
889 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
893 my $ts = defined($tconfig{'titlesize'}) ?
894 $tconfig{'titlesize'} : "+2";
895 print "<td id='headln2c' align=center width=70%>",
896 ($ts ? "<font size=$ts>" : ""),$_[0],
897 ($ts ? "</font>" : "");
898 print "<br>$_[9]\n" if ($_[9]);
901 print "<td id='headln2r' width=15% valign=top align=right>";
903 print "</td></tr></table>\n";
904 print $tconfig{'postheader'};
908 =head2 get_html_title(title)
910 Returns the full string to appear in the HTML <title> block.
917 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
918 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
919 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
920 $title = sprintf "%s : %s on %s (%s %s)\n",
921 $msg, $remote_user, &get_display_hostname(),
922 $os_type, $os_version;
924 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
925 $title = sprintf "%s on %s (%s %s)\n",
926 $remote_user, &get_display_hostname(),
927 $os_type, $os_version;
932 if ($gconfig{'showlogin'} && $remote_user) {
933 $title = $remote_user." : ".$title;
938 =head2 get_html_framed_title
940 Returns the title text for a framed theme main page.
943 sub get_html_framed_title
946 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
947 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
949 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
950 # Alternate title mode requested
951 $title = sprintf "%s on %s (%s %s)\n",
952 $remote_user, &get_display_hostname(),
953 $os_type, $os_version;
956 # Title like 'Webmin x.yy on hostname (Linux 6)'
957 if ($os_version eq "*") {
961 $ostr = "$os_type $os_version";
963 my $host = &get_display_hostname();
964 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
965 &text('main_title', &get_webmin_version(), $host, $ostr);
966 if ($gconfig{'showlogin'}) {
967 $title = $remote_user." : ".$title;
973 =head2 get_html_status_line(text-only)
975 Returns HTML for a script block that sets the status line, or if text-only
976 is set to 1, just return the status line text.
979 sub get_html_status_line
982 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
983 # Disabled in this mode
986 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
987 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
988 my $line = &text('header_statusmsg',
989 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
991 ($ENV{'SSL_USER'} ? " (SSL certified)" :
992 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
993 $text{'programname'},
994 &get_webmin_version(),
995 &get_display_hostname(),
996 $os_type.($os_version eq "*" ? "" :" $os_version"));
1001 return "<script language=JavaScript type=text/javascript>\n".
1002 "defaultStatus=\"$line\";\n".
1007 =head2 popup_header([title], [head-stuff], [body-stuff])
1009 Outputs a page header, suitable for a popup window. If no title is given,
1010 absolutely no decorations are output. Also useful in framesets. The parameters
1013 =item title - Title text for the popup window.
1015 =item head-stuff - HTML to appear in the <head> section.
1017 =item body-stuff - HTML attributes to be include in the <body> tag.
1022 return if ($main::done_webmin_header++);
1024 my $charset = defined($main::force_charset) ? $main::force_charset
1026 &PrintHeader($charset);
1027 &load_theme_library();
1028 if (defined(&theme_popup_header)) {
1029 &theme_popup_header(@_);
1032 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1035 if (defined(&theme_popup_prehead)) {
1036 &theme_popup_prehead(@_);
1038 print "<title>$_[0]</title>\n";
1040 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1041 if ($tconfig{'headinclude'}) {
1043 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
1050 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1051 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1052 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1053 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1054 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1055 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1056 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1058 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1059 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1060 if (defined(&theme_popup_prebody)) {
1061 &theme_popup_prebody(@_);
1065 =head2 footer([page, name]+, [noendbody])
1067 Outputs the footer for a Webmin HTML page, possibly with links back to other
1068 pages. The links are specified by pairs of parameters, the first of which is
1069 a link destination, and the second the link text. For example :
1071 footer('/', 'Webmin index', '', 'Module menu');
1076 &load_theme_library();
1077 my %this_module_info = &get_module_info(&get_module_name());
1078 if (defined(&theme_footer)) {
1079 $module_name = &get_module_name(); # Old themes use these
1080 %module_info = %this_module_info;
1084 for(my $i=0; $i+1<@_; $i+=2) {
1086 if ($url ne '/' || !$tconfig{'noindex'}) {
1088 $url = "/?cat=$this_module_info{'category'}";
1090 elsif ($url eq '' && &get_module_name()) {
1091 $url = "/".&get_module_name()."/".
1092 $this_module_info{'index_link'};
1094 elsif ($url =~ /^\?/ && &get_module_name()) {
1095 $url = "/".&get_module_name()."/$url";
1097 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1099 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1104 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1109 my $postbody = $tconfig{'postbody'};
1111 my $hostname = &get_display_hostname();
1112 my $version = &get_webmin_version();
1113 my $os_type = $gconfig{'real_os_type'} ||
1114 $gconfig{'os_type'};
1115 my $os_version = $gconfig{'real_os_version'} ||
1116 $gconfig{'os_version'};
1117 $postbody =~ s/%HOSTNAME%/$hostname/g;
1118 $postbody =~ s/%VERSION%/$version/g;
1119 $postbody =~ s/%USER%/$remote_user/g;
1120 $postbody =~ s/%OS%/$os_type $os_version/g;
1121 print "$postbody\n";
1123 if ($tconfig{'postbodyinclude'}) {
1125 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1131 if (defined(&theme_postbody)) {
1132 &theme_postbody(@_);
1134 print "</body></html>\n";
1140 Outputs html for a footer for a popup window, started by popup_header.
1145 &load_theme_library();
1146 if (defined(&theme_popup_footer)) {
1147 &theme_popup_footer(@_);
1150 print "</body></html>\n";
1153 =head2 load_theme_library
1155 Immediately loads the current theme's theme.pl file. Not generally useful for
1156 most module developers, as this is called automatically by the header function.
1159 sub load_theme_library
1161 return if (!$current_theme || $loaded_theme_library++);
1162 for(my $i=0; $i<@theme_root_directories; $i++) {
1163 if ($theme_configs[$i]->{'functions'}) {
1164 do $theme_root_directories[$i]."/".
1165 $theme_configs[$i]->{'functions'};
1170 =head2 redirect(url)
1172 Output HTTP headers to redirect the browser to some page. The url parameter is
1173 typically a relative URL like index.cgi or list_users.cgi.
1178 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1179 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1180 ":$ENV{'SERVER_PORT'}";
1181 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1182 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1184 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1185 # Absolute URL (like http://...)
1188 elsif ($_[0] =~ /^\//) {
1189 # Absolute path (like /foo/bar.cgi)
1190 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1192 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1193 # Relative URL (like foo.cgi)
1194 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1197 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1199 &load_theme_library();
1200 if (defined(&theme_redirect)) {
1201 $module_name = &get_module_name(); # Old themes use these
1202 %module_info = &get_module_info($module_name);
1203 &theme_redirect($_[0], $url);
1206 print "Location: $url\n\n";
1210 =head2 kill_byname(name, signal)
1212 Finds a process whose command line contains the given name (such as httpd), and
1213 sends some signal to it. The signal can be numeric (like 9) or named
1219 my @pids = &find_byname($_[0]);
1220 return scalar(@pids) if (&is_readonly_mode());
1221 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1222 if ($gconfig{'debug_what_procs'});
1223 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1227 =head2 kill_byname_logged(name, signal)
1229 Like kill_byname, but also logs the killing.
1232 sub kill_byname_logged
1234 my @pids = &find_byname($_[0]);
1235 return scalar(@pids) if (&is_readonly_mode());
1236 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1240 =head2 find_byname(name)
1242 Finds processes searching for the given name in their command lines, and
1243 returns a list of matching PIDs.
1248 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1249 # Linux with /proc filesystem .. use cmdline files, as this is
1250 # faster than forking
1252 opendir(PROCDIR, "/proc");
1253 foreach my $f (readdir(PROCDIR)) {
1254 if ($f eq int($f) && $f != $$) {
1255 my $line = &read_file_contents("/proc/$f/cmdline");
1256 if ($line =~ /$_[0]/) {
1265 if (&foreign_check("proc")) {
1266 # Call the proc module
1267 &foreign_require("proc", "proc-lib.pl");
1268 if (defined(&proc::list_processes)) {
1269 my @procs = &proc::list_processes();
1271 foreach my $p (@procs) {
1272 if ($p->{'args'} =~ /$_[0]/) {
1273 push(@pids, $p->{'pid'});
1276 @pids = grep { $_ != $$ } @pids;
1281 # Fall back to running a command
1283 $cmd = $gconfig{'find_pid_command'};
1284 $cmd =~ s/NAME/"$_[0]"/g;
1285 $cmd = &translate_command($cmd);
1286 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1287 @pids = grep { $_ != $$ } @pids;
1291 =head2 error([message]+)
1293 Display an error message and exit. This should be used by CGI scripts that
1294 encounter a fatal error or invalid user input to notify users of the problem.
1295 If error_setup has been called, the displayed error message will be prefixed
1296 by the message setup using that function.
1301 my $msg = join("", @_);
1302 $msg =~ s/<[^>]*>//;
1303 if (!$main::error_must_die) {
1304 print STDERR "Error: ",$msg,"\n";
1306 &load_theme_library();
1307 if ($main::error_must_die) {
1308 if ($gconfig{'error_stack'}) {
1309 print STDERR "Error: ",$msg,"\n";
1310 for(my $i=0; my @stack = caller($i); $i++) {
1311 print STDERR "File: $stack[1] Line: $stack[2] ",
1312 "Function: $stack[3]\n";
1317 elsif (!$ENV{'REQUEST_METHOD'}) {
1318 # Show text-only error
1319 print STDERR "$text{'error'}\n";
1320 print STDERR "-----\n";
1321 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1323 print STDERR "-----\n";
1324 if ($gconfig{'error_stack'}) {
1326 print STDERR $text{'error_stack'},"\n";
1327 for(my $i=0; my @stack = caller($i); $i++) {
1328 print STDERR &text('error_stackline',
1329 $stack[1], $stack[2], $stack[3]),"\n";
1334 elsif (defined(&theme_error)) {
1338 &header($text{'error'}, "");
1340 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1342 if ($gconfig{'error_stack'}) {
1344 print "<h3>$text{'error_stack'}</h3>\n";
1346 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1347 "<td><b>$text{'error_line'}</b></td> ",
1348 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1349 for($i=0; my @stack = caller($i); $i++) {
1351 print "<td>$stack[1]</td>\n";
1352 print "<td>$stack[2]</td>\n";
1353 print "<td>$stack[3]</td>\n";
1359 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1360 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1366 &unlock_all_files();
1367 &cleanup_tempnames();
1371 =head2 popup_error([message]+)
1373 This function is almost identical to error, but displays the message with HTML
1374 headers suitable for a popup window.
1379 &load_theme_library();
1380 if ($main::error_must_die) {
1383 elsif (defined(&theme_popup_error)) {
1384 &theme_popup_error(@_);
1387 &popup_header($text{'error'}, "");
1388 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1391 &unlock_all_files();
1392 &cleanup_tempnames();
1396 =head2 error_setup(message)
1398 Registers a message to be prepended to all error messages displayed by the
1404 $main::whatfailed = $_[0];
1407 =head2 wait_for(handle, regexp, regexp, ...)
1409 Reads from the input stream until one of the regexps matches, and returns the
1410 index of the matching regexp, or -1 if input ended before any matched. This is
1411 very useful for parsing the output of interactive programs, and can be used with
1412 a two-way pipe to feed input to a program in response to output matched by
1415 If the matching regexp contains bracketed sub-expressions, their values will
1416 be placed in the global array @matches, indexed starting from 1. You cannot
1417 use the Perl variables $1, $2 and so on to capture matches.
1421 $rv = wait_for($loginfh, "username:");
1423 error("Didn't get username prompt");
1425 print $loginfh "joe\n";
1426 $rv = wait_for($loginfh, "password:");
1428 error("Didn't get password prompt");
1430 print $loginfh "smeg\n";
1435 my ($c, $i, $sw, $rv, $ha);
1436 undef($wait_for_input);
1437 if ($wait_for_debug) {
1438 print STDERR "wait_for(",join(",", @_),")\n";
1440 $ha = &callers_package($_[0]);
1441 if ($wait_for_debug) {
1442 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1447 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1448 " \$wait_for_input .= \$c;\n";
1449 if ($wait_for_debug) {
1450 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1452 for($i=1; $i<@_; $i++) {
1453 $sw = $i>1 ? "elsif" : "if";
1454 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1457 " if (defined(\$hit)) {\n".
1458 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1464 &error("wait_for error : $@\n");
1469 =head2 fast_wait_for(handle, string, string, ...)
1471 This function behaves very similar to wait_for (documented above), but instead
1472 of taking regular expressions as parameters, it takes strings. As soon as the
1473 input contains one of them, it will return the index of the matching string.
1474 If the input ends before any match, it returns -1.
1479 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1480 for($i=1; $i<@_; $i++) {
1481 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1485 if (($c = getc($ha)) eq "") {
1486 &error("fast_wait_for read error : $!");
1489 if (length($inp) > $maxlen) {
1490 $inp = substr($inp, length($inp)-$maxlen);
1492 $inpl = length($inp);
1493 for($i=1; $i<@_; $i++) {
1494 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1501 =head2 has_command(command)
1503 Returns the full path to the executable if some command is in the path, or
1504 undef if not found. If the given command is already an absolute path and
1505 exists, then the same path will be returned.
1510 if (!$_[0]) { return undef; }
1511 if (exists($main::has_command_cache{$_[0]})) {
1512 return $main::has_command_cache{$_[0]};
1515 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1516 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1517 # Absolute path given - just use it
1518 my $t = &translate_filename($_[0]);
1519 $rv = (-x $t && !-d _) ? $_[0] : undef;
1522 # Check each directory in the path
1524 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1525 next if ($donedir{$d}++);
1526 $d =~ s/$slash$// if ($d ne $slash);
1527 my $t = &translate_filename("$d/$_[0]");
1528 if (-x $t && !-d _) {
1529 $rv = $d.$slash.$_[0];
1532 if ($gconfig{'os_type'} eq 'windows') {
1533 foreach my $sfx (".exe", ".com", ".bat") {
1534 my $t = &translate_filename("$d/$_[0]").$sfx;
1535 if (-r $t && !-d _) {
1536 $rv = $d.$slash.$_[0].$sfx;
1543 $main::has_command_cache{$_[0]} = $rv;
1547 =head2 make_date(seconds, [date-only], [fmt])
1549 Converts a Unix date/time in seconds to a human-readable form, by default
1550 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1552 =item seconds - Unix time is seconds to convert.
1554 =item date-only - If set to 1, exclude the time from the returned string.
1556 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1561 my ($secs, $only, $fmt) = @_;
1562 my @tm = localtime($secs);
1565 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1567 if ($fmt eq 'dd/mon/yyyy') {
1568 $date = sprintf "%2.2d/%s/%4.4d",
1569 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1571 elsif ($fmt eq 'dd/mm/yyyy') {
1572 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1574 elsif ($fmt eq 'mm/dd/yyyy') {
1575 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1577 elsif ($fmt eq 'yyyy/mm/dd') {
1578 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1581 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1586 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1588 Return HTML for a button that pops up a file chooser when clicked, and places
1589 the selected filename into another HTML field. The parameters are :
1591 =item input - Name of the form field to store the filename in.
1593 =item type - 0 for file or directory chooser, or 1 for directory only.
1595 =item form - Index of the form containing the button.
1597 =item chroot - If set to 1, the chooser will be limited to this directory.
1599 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1602 sub file_chooser_button
1604 return &theme_file_chooser_button(@_)
1605 if (defined(&theme_file_chooser_button));
1606 my $form = defined($_[2]) ? $_[2] : 0;
1607 my $chroot = defined($_[3]) ? $_[3] : "/";
1608 my $add = int($_[4]);
1609 my ($w, $h) = (400, 300);
1610 if ($gconfig{'db_sizefile'}) {
1611 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1613 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";
1616 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1618 Returns HTML for a button that will popup a chooser window of some kind. The
1621 =item url - Base URL of the popup window's contents
1623 =item width - Width of the window in pixels
1625 =item height - Height in pixels
1627 =item scrollbars - Set to 1 if the window should have scrollbars
1629 The field-mappings parameter is an array ref of array refs containing
1631 =item - Attribute to assign field to in the popup window
1633 =item - Form field name
1635 =item - CGI parameter to URL for value, if any
1638 sub popup_window_button
1640 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1641 my ($url, $w, $h, $scroll, $fields) = @_;
1642 my $scrollyn = $scroll ? "yes" : "no";
1643 my $rv = "<input type=button onClick='";
1644 foreach my $m (@$fields) {
1645 $rv .= "$m->[0] = form.$m->[1]; ";
1647 my $sep = $url =~ /\?/ ? "&" : "?";
1648 $rv .= "chooser = window.open(\"$url\"";
1649 foreach my $m (@$fields) {
1651 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1655 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1656 foreach my $m (@$fields) {
1657 $rv .= "chooser.$m->[0] = $m->[0]; ";
1658 $rv .= "window.$m->[0] = $m->[0]; ";
1660 $rv .= "' value=\"...\">";
1664 =head2 read_acl(&user-module-hash, &user-list-hash)
1666 Reads the Webmin acl file into the given hash references. The first is indexed
1667 by a combined key of username,module , with the value being set to 1 when
1668 the user has access to that module. The second is indexed by username, with
1669 the value being an array ref of allowed modules.
1671 This function is deprecated in favour of foreign_available, which performs a
1672 more comprehensive check of module availability.
1677 if (!defined(%main::acl_hash_cache)) {
1679 open(ACL, &acl_filename());
1681 if (/^([^:]+):\s*(.*)/) {
1683 my @mods = split(/\s+/, $2);
1684 foreach my $m (@mods) {
1685 $main::acl_hash_cache{$user,$m}++;
1687 $main::acl_array_cache{$user} = \@mods;
1692 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1693 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1698 Returns the file containing the webmin ACL, which is usually
1699 /etc/webmin/webmin.acl.
1704 return "$config_directory/webmin.acl";
1709 Does nothing, but kept around for compatability.
1716 =head2 get_miniserv_config(&hash)
1718 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1719 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1723 sub get_miniserv_config
1725 return &read_file_cached(
1726 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1729 =head2 put_miniserv_config(&hash)
1731 Writes out the Webmin webserver configuration file from the contents of
1732 the given hash ref. This should be initially populated by get_miniserv_config,
1735 get_miniserv_config(\%miniserv);
1736 $miniserv{'port'} = 10005;
1737 put_miniserv_config(\%miniserv);
1741 sub put_miniserv_config
1743 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1747 =head2 restart_miniserv([nowait])
1749 Kill the old miniserv process and re-start it, then optionally waits for
1750 it to restart. This will apply all configuration settings.
1753 sub restart_miniserv
1756 return undef if (&is_readonly_mode());
1758 &get_miniserv_config(\%miniserv) || return;
1761 if ($gconfig{'os_type'} ne 'windows') {
1762 # On Unix systems, we can restart with a signal
1763 my ($pid, $addr, $i);
1764 $miniserv{'inetd'} && return;
1765 my @oldst = stat($miniserv{'pidfile'});
1766 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1769 if (!$pid) { &error("Invalid PID file"); }
1771 # Just signal miniserv to restart
1772 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1774 # Wait till new PID is written, indicating a restart
1775 for($i=0; $i<60; $i++) {
1777 my @newst = stat($miniserv{'pidfile'});
1778 last if ($newst[9] != $oldst[9]);
1780 $i < 60 || &error("Webmin server did not write new PID file");
1782 ## Totally kill the process and re-run it
1783 #$SIG{'TERM'} = 'IGNORE';
1784 #&kill_logged('TERM', $pid);
1785 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1788 # On Windows, we need to use the flag file
1789 open(TOUCH, ">$miniserv{'restartflag'}");
1794 # wait for miniserv to come back up
1795 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1797 for($i=0; $i<20; $i++) {
1799 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1800 my $rv = connect(STEST,
1801 pack_sockaddr_in($miniserv{'port'}, $addr));
1803 last if ($rv && ++$ok >= 2);
1805 $i < 20 || &error("Failed to restart Webmin server!");
1809 =head2 reload_miniserv
1811 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1812 configuration files. Not all changes will be applied though, such as the
1813 IP addresses and ports to accept connections on.
1818 return undef if (&is_readonly_mode());
1820 &get_miniserv_config(\%miniserv) || return;
1822 if ($gconfig{'os_type'} ne 'windows') {
1823 # Send a USR1 signal to re-read the config
1824 my ($pid, $addr, $i);
1825 $miniserv{'inetd'} && return;
1826 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1829 if (!$pid) { &error("Invalid PID file"); }
1830 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1832 # Make sure this didn't kill Webmin!
1834 if (!kill(0, $pid)) {
1835 print STDERR "USR1 signal killed Webmin - restarting\n";
1836 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1840 # On Windows, we need to use the flag file
1841 open(TOUCH, ">$miniserv{'reloadflag'}");
1846 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1848 Returns 1 if some module is supported on the current operating system, or the
1849 OS supplies as parameters. The parameters are :
1851 =item minfo - A hash ref of module information, as returned by get_module_info
1853 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1855 =item os-version - The Webmin OS version to use, such as 13.0
1857 =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.
1860 sub check_os_support
1862 my $oss = $_[0]->{'os_support'};
1863 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1864 # May provide usable API
1865 $oss .= " ".$_[0]->{'api_os_support'};
1867 if ($_[0]->{'nozone'} && &running_in_zone()) {
1868 # Not supported in a Solaris Zone
1871 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1872 # Not supported in a Linux vserver
1875 return 1 if (!$oss || $oss eq '*');
1876 my $osver = $_[2] || $gconfig{'os_version'};
1877 my $ostype = $_[1] || $gconfig{'os_type'};
1880 my ($os, $ver, $codes);
1881 my ($neg) = ($oss =~ s/^!//); # starts with !
1882 $anyneg++ if ($neg);
1883 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1885 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1887 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1889 $os = $1; $ver = $2; $oss = $3;
1891 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1893 $os = $1; $codes = $2; $oss = $3;
1895 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1897 $codes = $1; $oss = $2;
1899 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1901 $os = $1; $oss = $2;
1904 next if ($os && !($os eq $ostype ||
1905 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1906 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1907 next if ($osver < $1 || $osver > $2);
1909 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1910 next if ($osver < $1);
1912 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1913 next if ($osver > $1);
1916 next if ($ver ne $osver);
1918 next if ($codes && !eval $codes);
1924 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1926 Downloads data from a HTTP url to a local file or string. The parameters are :
1928 =item host - The hostname part of the URL, such as www.google.com
1930 =item port - The HTTP port number, such as 80
1932 =item page - The filename part of the URL, like /index.html
1934 =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.
1936 =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.
1938 =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.
1940 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
1942 =item user - If set, HTTP authentication is done with this username.
1944 =item pass - The HTTP password to use with the username above.
1946 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
1948 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
1950 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
1952 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
1957 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
1958 $timeout, $osdn, $nocache, $headers) = @_;
1959 if ($gconfig{'debug_what_net'}) {
1960 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
1961 ($user ? " user=$user pass=$pass" : "").
1962 (ref($dest) ? "" : " dest=$dest"));
1965 # Convert OSDN URL first
1966 my $prot = $ssl ? "https://" : "http://";
1967 my $portstr = $ssl && $port == 443 ||
1968 !$ssl && $port == 80 ? "" : ":$port";
1969 ($host, $port, $page, $ssl) = &parse_http_url(
1970 &convert_osdn_url($prot.$host.$portstr.$page));
1973 # Check if we already have cached the URL
1974 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
1975 my $cfile = &check_in_http_cache($url);
1976 if ($cfile && !$nocache) {
1977 # Yes! Copy to dest file or variable
1978 &$cbfunc(6, $url) if ($cbfunc);
1980 &open_readfile(CACHEFILE, $cfile);
1982 $$dest = <CACHEFILE>;
1986 ©_source_dest($cfile, $dest);
1993 push(@headers, [ "Host", $host ]);
1994 push(@headers, [ "User-agent", "Webmin" ]);
1996 my $auth = &encode_base64("$user:$pass");
1997 $auth =~ tr/\r\n//d;
1998 push(@headers, [ "Authorization", "Basic $auth" ]);
2000 foreach my $hname (keys %$headers) {
2001 push(@headers, [ $hname, $headers->{$hname} ]);
2004 # Actually download it
2005 $main::download_timed_out = undef;
2006 local $SIG{ALRM} = \&download_timeout;
2007 alarm($timeout || 60);
2008 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2010 $h = $main::download_timed_out if ($main::download_timed_out);
2012 if ($error) { $$error = $h; return; }
2013 else { &error($h); }
2015 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2017 if ((!$error || !$$error) && !$nocache) {
2018 &write_to_http_cache($url, $dest);
2022 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl])
2024 Do a HTTP download, after the headers have been sent. For internal use only,
2025 typically called by http_download.
2028 sub complete_http_download
2030 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2036 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2037 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2039 if ($_[2]) { ${$_[2]} = $line; return; }
2040 else { &error("Download failed : $line"); }
2043 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2046 $line = &read_http_connection($_[0]);
2047 $line =~ tr/\r\n//d;
2048 $line =~ /^(\S+):\s+(.*)$/ || last;
2049 $header{lc($1)} = $2;
2050 push(@headers, [ lc($1), $2 ]);
2053 if ($main::download_timed_out) {
2054 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2055 else { &error($main::download_timed_out); }
2057 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2058 if ($rcode >= 300 && $rcode < 400) {
2059 # follow the redirect
2060 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2061 my ($host, $port, $page, $ssl);
2062 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2063 $ssl = $1 eq 'https' ? 1 : 0;
2064 $host = $2; $port = $3; $page = $4 || "/";
2066 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2067 $ssl = $1 eq 'https' ? 1 : 0;
2068 $host = $2; $port = 80; $page = $3 || "/";
2070 elsif ($header{'location'} =~ /^\// && $_[5]) {
2071 # Relative to same server
2075 $page = $header{'location'};
2077 elsif ($header{'location'}) {
2078 # Assume relative to same dir .. not handled
2079 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2080 else { &error("Invalid Location header $header{'location'}"); }
2083 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2084 else { &error("Missing Location header"); }
2086 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2087 undef, undef, undef, $_[4], 0, $_[7]);
2092 # Append to a variable
2093 while(defined($buf = &read_http_connection($_[0], 1024))) {
2095 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2101 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2102 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2103 else { &error("Failed to write to $_[1] : $!"); }
2105 binmode(PFILE); # For windows
2106 while(defined($buf = &read_http_connection($_[0], 1024))) {
2107 &print_tempfile(PFILE, $buf);
2108 $got += length($buf);
2109 &$cbfunc(3, $got) if ($cbfunc);
2111 &close_tempfile(PFILE);
2112 if ($header{'content-length'} &&
2113 $got != $header{'content-length'}) {
2114 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2115 else { &error("Download incomplete"); }
2118 &$cbfunc(4) if ($cbfunc);
2120 &close_http_connection($_[0]);
2124 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2126 Download data from an FTP site to a local file. The parameters are :
2128 =item host - FTP server hostname
2130 =item file - File on the FTP server to download
2132 =item destfile - File on the Webmin system to download data to
2134 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2136 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2138 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2140 =item pass - Password for the username above.
2142 =item port - FTP server port number, which defaults to 21 if not set.
2147 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2149 if ($gconfig{'debug_what_net'}) {
2150 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2151 ($user ? " user=$user pass=$pass" : "").
2152 (ref($dest) ? "" : " dest=$dest"));
2156 if (&is_readonly_mode()) {
2157 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2159 else { &error("FTP connections not allowed in readonly mode"); }
2162 # Check if we already have cached the URL
2163 my $url = "ftp://".$host.$file;
2164 my $cfile = &check_in_http_cache($url);
2166 # Yes! Copy to dest file or variable
2167 &$cbfunc(6, $url) if ($cbfunc);
2169 &open_readfile(CACHEFILE, $cfile);
2171 $$dest = <CACHEFILE>;
2175 ©_source_dest($cfile, $dest);
2180 # Actually download it
2181 $main::download_timed_out = undef;
2182 local $SIG{ALRM} = \&download_timeout;
2185 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2186 # download through http-style proxy
2188 if (&open_socket($1, $2, "SOCK", \$error)) {
2190 if ($main::download_timed_out) {
2192 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2193 else { &error($main::download_timed_out); }
2195 my $esc = $_[1]; $esc =~ s/ /%20/g;
2196 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2197 my $portstr = $port == 21 ? "" : ":$port";
2198 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2199 print SOCK "User-agent: Webmin\r\n";
2200 if ($gconfig{'proxy_user'}) {
2201 my $auth = &encode_base64(
2202 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2203 $auth =~ tr/\r\n//d;
2204 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2207 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2210 elsif (!$gconfig{'proxy_fallback'}) {
2212 if ($error) { $$error = $main::download_timed_out; return 0; }
2213 else { &error($main::download_timed_out); }
2218 # connect to host and login with real FTP protocol
2219 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2221 if ($main::download_timed_out) {
2222 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2223 else { &error($main::download_timed_out); }
2225 &ftp_command("", 2, $_[3]) || return 0;
2227 # Login as supplied user
2228 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2230 if (int($urv[1]/100) == 3) {
2231 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2235 # Login as anonymous
2236 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2238 if (int($urv[1]/100) == 3) {
2239 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2243 &$cbfunc(1, 0) if ($cbfunc);
2246 # get the file size and tell the callback
2247 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2248 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2249 defined($size) || return 0;
2251 &$cbfunc(2, int($size));
2255 my $pasv = &ftp_command("PASV", 2, $_[3]);
2256 defined($pasv) || return 0;
2257 $pasv =~ /\(([0-9,]+)\)/;
2258 @n = split(/,/ , $1);
2259 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2260 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2261 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2265 &open_tempfile(PFILE, ">$_[2]", 1);
2266 while(read(CON, $buf, 1024) > 0) {
2267 &print_tempfile(PFILE, $buf);
2268 $got += length($buf);
2269 &$cbfunc(3, $got) if ($cbfunc);
2271 &close_tempfile(PFILE);
2273 if ($got != $size) {
2274 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2275 else { &error("Download incomplete"); }
2277 &$cbfunc(4) if ($cbfunc);
2279 &ftp_command("", 2, $_[3]) || return 0;
2283 &ftp_command("QUIT", 2, $_[3]) || return 0;
2287 &write_to_http_cache($url, $dest);
2291 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2293 Upload data from a local file to an FTP site. The parameters are :
2295 =item host - FTP server hostname
2297 =item file - File on the FTP server to write to
2299 =item srcfile - File on the Webmin system to upload data from
2301 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2303 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2305 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2307 =item pass - Password for the username above.
2309 =item port - FTP server port number, which defaults to 21 if not set.
2316 if (&is_readonly_mode()) {
2317 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2319 else { &error("FTP connections not allowed in readonly mode"); }
2322 $main::download_timed_out = undef;
2323 local $SIG{ALRM} = \&download_timeout;
2326 # connect to host and login
2327 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2329 if ($main::download_timed_out) {
2330 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2331 else { &error($main::download_timed_out); }
2333 &ftp_command("", 2, $_[3]) || return 0;
2335 # Login as supplied user
2336 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2338 if (int($urv[1]/100) == 3) {
2339 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2343 # Login as anonymous
2344 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2346 if (int($urv[1]/100) == 3) {
2347 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2351 &$cbfunc(1, 0) if ($cbfunc);
2353 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2355 # get the file size and tell the callback
2356 my @st = stat($_[2]);
2358 &$cbfunc(2, $st[7]);
2362 my $pasv = &ftp_command("PASV", 2, $_[3]);
2363 defined($pasv) || return 0;
2364 $pasv =~ /\(([0-9,]+)\)/;
2365 @n = split(/,/ , $1);
2366 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2367 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2372 while(read(PFILE, $buf, 1024) > 0) {
2374 $got += length($buf);
2375 &$cbfunc(3, $got) if ($cbfunc);
2379 if ($got != $st[7]) {
2380 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2381 else { &error("Upload incomplete"); }
2383 &$cbfunc(4) if ($cbfunc);
2386 &ftp_command("", 2, $_[3]) || return 0;
2387 &ftp_command("QUIT", 2, $_[3]) || return 0;
2393 =head2 no_proxy(host)
2395 Checks if some host is on the no proxy list. For internal use by the
2396 http_download and ftp_download functions.
2401 my $ip = &to_ipaddress($_[0]);
2402 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2403 return 1 if ($_[0] =~ /\Q$n\E/ ||
2409 =head2 open_socket(host, port, handle, [&error])
2411 Open a TCP connection to some host and port, using a file handle. The
2414 =item host - Hostname or IP address to connect to.
2416 =item port - TCP port number.
2418 =item handle - A file handle name to use for the connection.
2420 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2425 my ($host, $port, $fh, $err) = @_;
2426 $fh = &callers_package($fh);
2428 if ($gconfig{'debug_what_net'}) {
2429 &webmin_debug_log('TCP', "host=$host port=$port");
2431 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2432 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2433 else { &error("Failed to create socket : $!"); }
2436 if (!($addr = inet_aton($host))) {
2437 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2438 else { &error("Failed to lookup IP address for $host"); }
2440 if ($gconfig{'bind_proxy'}) {
2441 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2442 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2443 else { &error("Failed to bind to source address : $!"); }
2446 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2447 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2448 else { &error("Failed to connect to $host:$port : $!"); }
2450 my $old = select($fh); $| =1; select($old);
2454 =head2 download_timeout
2456 Called when a download times out. For internal use only.
2459 sub download_timeout
2461 $main::download_timed_out = "Download timed out";
2464 =head2 ftp_command(command, expected, [&error], [filehandle])
2466 Send an FTP command, and die if the reply is not what was expected. Mainly
2467 for internal use by the ftp_download and ftp_upload functions.
2472 my ($cmd, $expect, $err, $fh) = @_;
2474 $fh = &callers_package($fh);
2477 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2479 print $fh "$cmd\r\n";
2482 if (!($line = <$fh>)) {
2484 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2485 else { &error("Failed to read reply to $what"); }
2487 $line =~ /^(...)(.)(.*)$/;
2490 foreach my $c (@$expect) {
2491 $found++ if (int($1/100) == $c);
2495 $found++ if (int($1/100) == $_[1]);
2499 if ($err) { $$err = "$what failed : $3"; return undef; }
2500 else { &error("$what failed : $3"); }
2505 # Need to skip extra stuff..
2507 if (!($line = <$fh>)) {
2509 if ($$err) { $$err = "Failed to read reply to $what";
2511 else { &error("Failed to read reply to $what"); }
2513 $line =~ /^(....)(.*)$/; $reply .= $2;
2514 if ($1 eq "$rcode ") { last; }
2518 return wantarray ? ($reply, $rcode) : $reply;
2521 =head2 to_ipaddress(hostname)
2523 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2524 it cannot be resolved.
2529 if (&check_ipaddress($_[0])) {
2533 my $hn = gethostbyname($_[0]);
2534 return undef if (!$hn);
2535 local @ip = unpack("CCCC", $hn);
2536 return join("." , @ip);
2540 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2542 Renders a 4-column table of icons. The useful parameters are :
2544 =item links - An array ref of link destination URLs for the icons.
2546 =item titles - An array ref of titles to appear under the icons.
2548 =item icons - An array ref of URLs for icon images.
2550 =item columns - Number of columns to layout the icons with. Defaults to 4.
2555 &load_theme_library();
2556 if (defined(&theme_icons_table)) {
2557 &theme_icons_table(@_);
2561 my $cols = $_[3] ? $_[3] : 4;
2562 my $per = int(100.0 / $cols);
2563 print "<table class='icons_table' width=100% cellpadding=5>\n";
2564 for(my $i=0; $i<@{$_[0]}; $i++) {
2565 if ($i%$cols == 0) { print "<tr>\n"; }
2566 print "<td width=$per% align=center valign=top>\n";
2567 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2568 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2569 $_[7]->[$i], $_[8]->[$i]);
2571 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2573 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2574 print "</tr>\n" if ($need_tr);
2578 =head2 replace_file_line(file, line, [newline]*)
2580 Replaces one line in some file with 0 or more new lines. The parameters are :
2582 =item file - Full path to some file, like /etc/hosts.
2584 =item line - Line number to replace, starting from 0.
2586 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2589 sub replace_file_line
2592 my $realfile = &translate_filename($_[0]);
2593 open(FILE, $realfile);
2596 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2597 else { splice(@lines, $_[1], 1); }
2598 &open_tempfile(FILE, ">$realfile");
2599 &print_tempfile(FILE, @lines);
2600 &close_tempfile(FILE);
2603 =head2 read_file_lines(file, [readonly])
2605 Returns a reference to an array containing the lines from some file. This
2606 array can be modified, and will be written out when flush_file_lines()
2607 is called. The parameters are :
2609 =item file - Full path to the file to read.
2611 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2615 $lref = read_file_lines("/etc/hosts");
2616 push(@$lref, "127.0.0.1 localhost");
2617 flush_file_lines("/etc/hosts");
2623 my ($package, $filename, $line) = caller;
2624 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2626 my $realfile = &translate_filename($_[0]);
2627 if (!$main::file_cache{$realfile}) {
2630 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2631 open(READFILE, $realfile);
2634 $eol = /\r\n$/ ? "\r\n" : "\n";
2640 $main::file_cache{$realfile} = \@lines;
2641 $main::file_cache_noflush{$realfile} = $_[1];
2642 $main::file_cache_eol{$realfile} = $eol || "\n";
2645 # Make read-write if currently readonly
2647 $main::file_cache_noflush{$realfile} = 0;
2650 return $main::file_cache{$realfile};
2653 =head2 flush_file_lines([file], [eol])
2655 Write out to a file previously read by read_file_lines to disk (except
2656 for those marked readonly). The parameters are :
2658 =item file - The file to flush out.
2660 =item eof - End-of-line character for each line. Defaults to \n.
2663 sub flush_file_lines
2667 local $trans = &translate_filename($_[0]);
2668 $main::file_cache{$trans} ||
2669 &error("flush_file_lines called on non-loaded file $trans");
2670 push(@files, $trans);
2673 @files = ( keys %main::file_cache );
2675 foreach my $f (@files) {
2676 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2677 if (!$main::file_cache_noflush{$f}) {
2678 &open_tempfile(FLUSHFILE, ">$f");
2679 foreach my $line (@{$main::file_cache{$f}}) {
2680 (print FLUSHFILE $line,$eol) ||
2681 &error(&text("efilewrite", $f, $!));
2683 &close_tempfile(FLUSHFILE);
2685 delete($main::file_cache{$f});
2686 delete($main::file_cache_noflush{$f});
2690 =head2 unflush_file_lines(file)
2692 Clear the internal cache of some given file, previously read by read_file_lines.
2695 sub unflush_file_lines
2697 my $realfile = &translate_filename($_[0]);
2698 delete($main::file_cache{$realfile});
2699 delete($main::file_cache_noflush{$realfile});
2702 =head2 unix_user_input(fieldname, user, [form])
2704 Returns HTML for an input to select a Unix user. By default this is a text
2705 box with a user popup button next to it.
2710 if (defined(&theme_unix_user_input)) {
2711 return &theme_unix_user_input(@_);
2713 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2714 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2717 =head2 unix_group_input(fieldname, user, [form])
2719 Returns HTML for an input to select a Unix group. By default this is a text
2720 box with a group popup button next to it.
2723 sub unix_group_input
2725 if (defined(&theme_unix_group_input)) {
2726 return &theme_unix_group_input(@_);
2728 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2729 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2732 =head2 hlink(text, page, [module], [width], [height])
2734 Returns HTML for a link that when clicked on pops up a window for a Webmin
2735 help page. The parameters are :
2737 =item text - Text for the link.
2739 =item page - Help page code, such as 'intro'.
2741 =item module - Module the help page is in. Defaults to the current module.
2743 =item width - Width of the help popup window. Defaults to 600 pixels.
2745 =item height - Height of the help popup window. Defaults to 400 pixels.
2747 The actual help pages are in each module's help sub-directory, in files with
2753 if (defined(&theme_hlink)) {
2754 return &theme_hlink(@_);
2756 my $mod = $_[2] ? $_[2] : &get_module_name();
2757 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2758 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2759 return "<a onClick='window.open(\"$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>";
2762 =head2 user_chooser_button(field, multiple, [form])
2764 Returns HTML for a javascript button for choosing a Unix user or users.
2765 The parameters are :
2767 =item field - Name of the HTML field to place the username into.
2769 =item multiple - Set to 1 if multiple users can be selected.
2771 =item form - Index of the form on the page.
2774 sub user_chooser_button
2776 return undef if (!&supports_users());
2777 return &theme_user_chooser_button(@_)
2778 if (defined(&theme_user_chooser_button));
2779 my $form = defined($_[2]) ? $_[2] : 0;
2780 my $w = $_[1] ? 500 : 300;
2782 if ($_[1] && $gconfig{'db_sizeusers'}) {
2783 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2785 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2786 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2788 return "<input type=button onClick='ifield = form.$_[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";
2791 =head2 group_chooser_button(field, multiple, [form])
2793 Returns HTML for a javascript button for choosing a Unix group or groups
2794 The parameters are :
2796 =item field - Name of the HTML field to place the group name into.
2798 =item multiple - Set to 1 if multiple groups can be selected.
2800 =item form - Index of the form on the page.
2803 sub group_chooser_button
2805 return undef if (!&supports_users());
2806 return &theme_group_chooser_button(@_)
2807 if (defined(&theme_group_chooser_button));
2808 my $form = defined($_[2]) ? $_[2] : 0;
2809 my $w = $_[1] ? 500 : 300;
2811 if ($_[1] && $gconfig{'db_sizeusers'}) {
2812 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2814 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2815 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2817 return "<input type=button onClick='ifield = form.$_[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";
2820 =head2 foreign_check(module, [api-only])
2822 Checks if some other module exists and is supported on this OS. The parameters
2825 =item module - Name of the module to check.
2827 =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.
2832 my ($mod, $api) = @_;
2834 my $mdir = &module_root_directory($mod);
2835 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2836 return &check_os_support(\%minfo, undef, undef, $api);
2839 =head2 foreign_exists(module)
2841 Checks if some other module exists. The module parameter is the short module
2847 my $mdir = &module_root_directory($_[0]);
2848 return -r "$mdir/module.info";
2851 =head2 foreign_available(module)
2853 Returns 1 if some module is installed, and acessible to the current user. The
2854 module parameter is the module directory name.
2857 sub foreign_available
2859 return 0 if (!&foreign_check($_[0]) &&
2860 !$gconfig{'available_even_if_no_support'});
2861 my %foreign_module_info = &get_module_info($_[0]);
2863 # Check list of allowed modules
2865 &read_acl(\%acl, undef);
2866 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2867 !$acl{$base_remote_user,'*'});
2869 # Check for usermod restrictions
2870 my @usermods = &list_usermods();
2871 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2873 if (&get_product_name() eq "webmin") {
2874 # Check if the user has any RBAC privileges in this module
2875 if (&supports_rbac($_[0]) &&
2876 &use_rbac_module_acl(undef, $_[0])) {
2877 # RBAC is enabled for this user and module - check if he
2879 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2880 return 0 if (!$rbacs);
2882 elsif ($gconfig{'rbacdeny_'.$u}) {
2883 # If denying access to modules not specifically allowed by
2884 # RBAC, then prevent access
2889 # Check readonly support
2890 if (&is_readonly_mode()) {
2891 return 0 if (!$foreign_module_info{'readonly'});
2894 # Check if theme vetos
2895 if (defined(&theme_foreign_available)) {
2896 return 0 if (!&theme_foreign_available($_[0]));
2899 # Check if licence module vetos
2900 if ($main::licence_module) {
2901 return 0 if (!&foreign_call($main::licence_module,
2902 "check_module_licence", $_[0]));
2908 =head2 foreign_require(module, [file], [package])
2910 Brings in functions from another module, and places them in the Perl namespace
2911 with the same name as the module. The parameters are :
2913 =item module - The source module's directory name, like sendmail.
2915 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2917 =item package - Perl package to place the module's functions and global variables in.
2919 If the original module name contains dashes, they will be replaced with _ in
2925 my ($mod, $file, $pkg) = @_;
2926 $pkg ||= $mod || "global";
2927 $pkg =~ s/[^A-Za-z0-9]/_/g;
2930 push(@files, $file);
2934 my %minfo = &get_module_info($mod);
2935 if ($minfo{'library'}) {
2936 @files = split(/\s+/, $minfo{'library'});
2939 @files = ( $mod."-lib.pl" );
2942 my @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
2943 return 1 if (!@files);
2944 foreach my $f (@files) {
2945 $main::done_foreign_require{$pkg,$f}++;
2948 my $mdir = &module_root_directory($mod);
2949 @INC = &unique($mdir, @INC);
2950 -d $mdir || &error("Module $mod does not exist");
2951 if (!&get_module_name() && $mod) {
2954 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
2955 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
2956 my $code = "package $pkg; ".
2957 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
2958 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
2959 foreach my $f (@files) {
2960 $code .= "do '$mdir/$f' || die \$@; ";
2963 if (defined($old_fmn)) {
2964 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
2967 delete($ENV{'FOREIGN_MODULE_NAME'});
2969 if (defined($old_frd)) {
2970 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
2973 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
2976 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
2980 =head2 foreign_call(module, function, [arg]*)
2982 Call a function in another module. The module parameter is the target module
2983 directory name, function is the perl sub to call, and the remaining parameters
2984 are the arguments. However, unless you need to call a function whose name
2985 is dynamic, it is better to use Perl's cross-module function call syntax
2986 like module::function(args).
2991 my $pkg = $_[0] || "global";
2992 $pkg =~ s/[^A-Za-z0-9]/_/g;
2993 my @args = @_[2 .. @_-1];
2994 $main::foreign_args = \@args;
2995 my @rv = eval <<EOF;
2997 &$_[1](\@{\$main::foreign_args});
2999 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3000 return wantarray ? @rv : $rv[0];
3003 =head2 foreign_config(module, [user-config])
3005 Get the configuration from another module, and return it as a hash. If the
3006 user-config parameter is set to 1, returns the Usermin user-level preferences
3007 for the current user instead.
3012 my ($mod, $uc) = @_;
3015 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3016 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3017 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3020 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3025 =head2 foreign_installed(module, mode)
3027 Checks if the server for some module is installed, and possibly also checks
3028 if the module has been configured by Webmin.
3029 For mode 1, returns 2 if the server is installed and configured for use by
3030 Webmin, 1 if installed but not configured, or 0 otherwise.
3031 For mode 0, returns 1 if installed, 0 if not.
3032 If the module does not provide an install_check.pl script, assumes that
3033 the server is installed.
3036 sub foreign_installed
3038 my ($mod, $configured) = @_;
3039 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3041 return $main::foreign_installed_cache{$mod,$configured};
3045 if (!&foreign_check($mod)) {
3050 my $mdir = &module_root_directory($mod);
3051 if (!-r "$mdir/install_check.pl") {
3052 # Not known, assume OK
3053 $rv = $configured ? 2 : 1;
3056 # Call function to check
3057 &foreign_require($mod, "install_check.pl");
3058 $rv = &foreign_call($mod, "is_installed", $configured);
3061 $main::foreign_installed_cache{$mod,$configured} = $rv;
3066 =head2 foreign_defined(module, function)
3068 Returns 1 if some function is defined in another module. In general, it is
3069 simpler to use the syntax &defined(module::function) instead.
3075 $pkg =~ s/[^A-Za-z0-9]/_/g;
3076 my $func = "${pkg}::$_[1]";
3077 return defined(&$func);
3080 =head2 get_system_hostname([short])
3082 Returns the hostname of this system. If the short parameter is set to 1,
3083 then the domain name is not prepended - otherwise, Webmin will attempt to get
3084 the fully qualified hostname, like foo.example.com.
3087 sub get_system_hostname
3090 if (!$main::get_system_hostname[$m]) {
3091 if ($gconfig{'os_type'} ne 'windows') {
3092 # Try some common Linux hostname files first
3094 if ($gconfig{'os_type'} eq 'redhat-linux') {
3096 &read_env_file("/etc/sysconfig/network", \%nc);
3097 if ($nc{'HOSTNAME'}) {
3098 $fromfile = $nc{'HOSTNAME'};
3101 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3102 my $hn = &read_file_contents("/etc/hostname");
3108 elsif ($gconfig{'os_type'} eq 'open-linux') {
3109 my $hn = &read_file_contents("/etc/HOSTNAME");
3115 elsif ($gconfig{'os_type'} eq 'solaris') {
3116 my $hn = &read_file_contents("/etc/nodename");
3123 # If we found a hostname, use it if value
3124 if ($fromfile && ($m || $fromfile =~ /\./)) {
3126 $fromfile =~ s/\..*$//;
3128 $main::get_system_hostname[$m] = $fromfile;
3132 # Can use hostname command on Unix
3133 &execute_command("hostname", undef,
3134 \$main::get_system_hostname[$m], undef, 0, 1);
3135 chop($main::get_system_hostname[$m]);
3137 eval "use Sys::Hostname";
3139 $main::get_system_hostname[$m] = eval "hostname()";
3141 if ($@ || !$main::get_system_hostname[$m]) {
3142 $main::get_system_hostname[$m] = "UNKNOWN";
3145 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3146 $gconfig{'os_type'} =~ /linux$/ &&
3147 !$gconfig{'no_hostname_f'} && !$_[0]) {
3148 # Try with -f flag to get fully qualified name
3150 my $ex = &execute_command("hostname -f", undef, \$flag,
3153 if ($ex || $flag eq "") {
3154 # -f not supported! We have probably set the
3155 # hostname to just '-f'. Fix the problem
3158 &execute_command("hostname ".
3159 quotemeta($main::get_system_hostname[$m]),
3160 undef, undef, undef, 0, 1);
3164 $main::get_system_hostname[$m] = $flag;
3169 # On Windows, try computername environment variable
3170 return $ENV{'computername'} if ($ENV{'computername'});
3171 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3173 # Fall back to net name command
3174 my $out = `net name 2>&1`;
3175 if ($out =~ /\-+\r?\n(\S+)/) {
3176 $main::get_system_hostname[$m] = $1;
3179 $main::get_system_hostname[$m] = "windows";
3183 return $main::get_system_hostname[$m];
3186 =head2 get_webmin_version
3188 Returns the version of Webmin currently being run, such as 1.450.
3191 sub get_webmin_version
3193 if (!$get_webmin_version) {
3194 open(VERSION, "$root_directory/version") || return 0;
3195 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3198 return $get_webmin_version;
3201 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3203 Returns a hash containing access control options for the given user and module.
3204 By default the current username and module name are used. If the no-rbac flag
3205 is given, the permissions will not be updated based on the user's RBAC role
3206 (as seen on Solaris). If the no-default flag is given, default permissions for
3207 the module will not be included.
3212 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3213 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3214 my $mdir = &module_root_directory($m);
3217 # Read default ACL first, to be overridden by per-user settings
3218 &read_file_cached("$mdir/defaultacl", \%rv);
3220 # If this isn't a master admin user, apply the negative permissions
3221 # so that he doesn't un-expectedly gain access to new features
3223 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3224 if ($gaccess{'negative'}) {
3225 &read_file_cached("$mdir/negativeacl", \%rv);
3229 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3230 # RBAC overrides exist for this user in this module
3231 my $rbac = &get_rbac_module_acl(
3232 defined($_[0]) ? $_[0] : $remote_user, $m);
3233 foreach my $r (keys %$rbac) {
3234 $rv{$r} = $rbac->{$r};
3237 elsif ($gconfig{"risk_$u"} && $m) {
3238 # ACL is defined by user's risk level
3239 my $rf = $gconfig{"risk_$u"}.'.risk';
3240 &read_file_cached("$mdir/$rf", \%rv);
3242 my $sf = $gconfig{"skill_$u"}.'.skill';
3243 &read_file_cached("$mdir/$sf", \%rv);
3246 # Use normal Webmin ACL, if a user is set
3247 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3248 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3249 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3252 if ($tconfig{'preload_functions'}) {
3253 &load_theme_library();
3255 if (defined(&theme_get_module_acl)) {
3256 %rv = &theme_get_module_acl($u, $m, \%rv);
3261 =head2 get_group_module_acl(group, [module])
3263 Returns the ACL for a Webmin group, in an optional module (which defaults to
3264 the current module).
3267 sub get_group_module_acl
3270 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3271 my $mdir = &module_root_directory($m);
3273 &read_file_cached("$mdir/defaultacl", \%rv);
3274 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3275 if (defined(&theme_get_module_acl)) {
3276 %rv = &theme_get_module_acl($g, $m, \%rv);
3281 =head2 save_module_acl(&acl, [user], [module])
3283 Updates the acl hash for some user and module. The parameters are :
3285 =item acl - Hash reference for the new access control options.
3287 =item user - User to update, defaulting to the current user.
3289 =item module - Module to update, defaulting to the caller.
3294 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3295 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3296 if (&foreign_check("acl")) {
3297 # Check if this user is a member of a group, and if he gets the
3298 # module from a group. If so, update its ACL as well
3299 &foreign_require("acl", "acl-lib.pl");
3301 foreach my $g (&acl::list_groups()) {
3302 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3303 &indexof($m, @{$g->{'modules'}}) >= 0) {
3309 &save_group_module_acl($_[0], $group->{'name'}, $m);
3312 if (!-d "$config_directory/$m") {
3313 mkdir("$config_directory/$m", 0755);
3315 &write_file("$config_directory/$m/$u.acl", $_[0]);
3318 =head2 save_group_module_acl(&acl, group, [module])
3320 Updates the acl hash for some group and module. The parameters are :
3322 =item acl - Hash reference for the new access control options.
3324 =item group - Group name to update.
3326 =item module - Module to update, defaulting to the caller.
3329 sub save_group_module_acl
3332 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3333 if (&foreign_check("acl")) {
3334 # Check if this group is a member of a group, and if it gets the
3335 # module from a group. If so, update the parent ACL as well
3336 &foreign_require("acl", "acl-lib.pl");
3338 foreach my $pg (&acl::list_groups()) {
3339 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3340 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3346 &save_group_module_acl($_[0], $group->{'name'}, $m);
3349 if (!-d "$config_directory/$m") {
3350 mkdir("$config_directory/$m", 0755);
3352 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3357 This function must be called by all Webmin CGI scripts, either directly or
3358 indirectly via a per-module lib.pl file. It performs a number of initialization
3359 and housekeeping tasks, such as working out the module name, checking that the
3360 current user has access to the module, and populating global variables. Some
3361 of the variables set include :
3363 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3365 =item $var_directory - Base logs directory, typically /var/webmin
3367 =item %config - Per-module configuration.
3369 =item %gconfig - Global configuration.
3371 =item $scriptname - Base name of the current perl script.
3373 =item $module_name - The name of the current module.
3375 =item $module_config_directory - The config directory for this module.
3377 =item $module_config_file - The config file for this module.
3379 =item $module_root_directory - This module's code directory.
3381 =item $webmin_logfile - The detailed logfile for webmin.
3383 =item $remote_user - The actual username used to login to webmin.
3385 =item $base_remote_user - The username whose permissions are in effect.
3387 =item $current_theme - The theme currently in use.
3389 =item $root_directory - The first root directory of this webmin install.
3391 =item @root_directories - All root directories for this webmin install.
3396 # Record first process ID that called this, so we know when it exited to clean
3398 $main::initial_process_id ||= $$;
3400 # Configuration and spool directories
3401 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3402 die "WEBMIN_CONFIG not set";
3404 $config_directory = $ENV{'WEBMIN_CONFIG'};
3405 if (!defined($ENV{'WEBMIN_VAR'})) {
3406 open(VARPATH, "$config_directory/var-path");
3407 chop($var_directory = <VARPATH>);
3411 $var_directory = $ENV{'WEBMIN_VAR'};
3413 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3414 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3416 if ($ENV{'SESSION_ID'}) {
3417 # Hide this variable from called programs, but keep it for internal use
3418 $main::session_id = $ENV{'SESSION_ID'};
3419 delete($ENV{'SESSION_ID'});
3421 if ($ENV{'REMOTE_PASS'}) {
3422 # Hide the password too
3423 $main::remote_pass = $ENV{'REMOTE_PASS'};
3424 delete($ENV{'REMOTE_PASS'});
3427 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3428 # Looks like we are running setuid, but the real UID hasn't been set.
3429 # Do so now, so that executed programs don't get confused
3434 # Read the webmin global config file. This contains the OS type and version,
3435 # OS specific configuration and global options such as proxy servers
3436 $config_file = "$config_directory/config";
3438 &read_file_cached($config_file, \%gconfig);
3439 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3440 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3442 # If debugging is enabled, open the debug log
3443 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3444 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3445 if ($gconfig{'debug_size'}) {
3446 my @st = stat($dlog);
3447 if ($st[7] > $gconfig{'debug_size'}) {
3448 rename($dlog, $dlog.".0");
3451 open(main::DEBUGLOG, ">>$dlog");
3452 $main::opened_debug_log = 1;
3454 if ($gconfig{'debug_what_start'}) {
3455 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3456 $main::debug_log_start_time = time();
3457 &webmin_debug_log("START", "script=$script_name");
3458 $main::debug_log_start_module = $module_name;
3462 # Set PATH and LD_LIBRARY_PATH
3463 if ($gconfig{'path'}) {
3464 if ($gconfig{'syspath'}) {
3466 $ENV{'PATH'} = $gconfig{'path'};
3470 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3473 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3475 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3476 if ($gconfig{'http_proxy'}) {
3477 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3479 if ($gconfig{'ftp_proxy'}) {
3480 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3482 if ($gconfig{'noproxy'}) {
3483 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3486 # Find all root directories
3488 if (&get_miniserv_config(\%miniserv)) {
3489 @root_directories = ( $miniserv{'root'} );
3490 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3491 push(@root_directories, $miniserv{"extraroot_$i"});
3495 # Work out which module we are in, and read the per-module config file
3496 $0 =~ s/\\/\//g; # Force consistent path on Windows
3497 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3498 # In a foreign call - use the module name given
3499 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3500 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3501 @root_directories = ( $root_directory ) if (!@root_directories);
3503 elsif ($ENV{'SCRIPT_NAME'}) {
3504 my $sn = $ENV{'SCRIPT_NAME'};
3505 $sn =~ s/^$gconfig{'webprefix'}//
3506 if (!$gconfig{'webprefixnoredir'});
3507 if ($sn =~ /^\/([^\/]+)\//) {
3508 # Get module name from CGI path
3511 if ($ENV{'SERVER_ROOT'}) {
3512 $root_directory = $ENV{'SERVER_ROOT'};
3514 elsif ($ENV{'SCRIPT_FILENAME'}) {
3515 $root_directory = $ENV{'SCRIPT_FILENAME'};
3516 $root_directory =~ s/$sn$//;
3518 @root_directories = ( $root_directory ) if (!@root_directories);
3521 # Get root directory from miniserv.conf, and deduce module name from $0
3522 $root_directory = $root_directories[0];
3524 foreach my $r (@root_directories) {
3525 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3526 # Under a module directory
3531 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3537 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3540 # Work out of this is a web, command line or cron job
3541 if (!$main::webmin_script_type) {
3542 if ($ENV{'SCRIPT_NAME'}) {
3544 $main::webmin_script_type = 'web';
3547 # Cron jobs have no TTY
3548 if ($gconfig{'os_type'} eq 'windows' ||
3549 open(DEVTTY, ">/dev/tty")) {
3550 $main::webmin_script_type = 'cmd';
3554 $main::webmin_script_type = 'cron';
3559 # Set the umask based on config
3560 if ($gconfig{'umask'} && !$main::umask_already++) {
3561 umask(oct($gconfig{'umask'}));
3564 # If this is a cron job or other background task, set the nice level
3565 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3567 if ($gconfig{'nice'}) {
3568 eval 'POSIX::nice($gconfig{\'nice\'});';
3571 # Set IO scheduling class and priority
3572 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3574 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3575 if ($gconfig{'sclass'} ne '');
3576 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3577 if ($gconfig{'sprio'} ne '');
3579 &execute_command("$cmd >/dev/null 2>&1");
3582 $main::nice_already++;
3585 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3586 $base_remote_user = $u;
3587 $remote_user = $ENV{'REMOTE_USER'};
3590 # Find and load the configuration file for this module
3591 my (@ruinfo, $rgroup);
3592 $module_config_directory = "$config_directory/$module_name";
3593 if (&get_product_name() eq "usermin" &&
3594 -r "$module_config_directory/config.$remote_user") {
3596 $module_config_file = "$module_config_directory/config.$remote_user";
3598 elsif (&get_product_name() eq "usermin" &&
3599 (@ruinfo = getpwnam($remote_user)) &&
3600 ($rgroup = getgrgid($ruinfo[3])) &&
3601 -r "$module_config_directory/config.\@$rgroup") {
3602 # Based on group name
3603 $module_config_file = "$module_config_directory/config.\@$rgroup";
3607 $module_config_file = "$module_config_directory/config";
3610 &read_file_cached($module_config_file, \%config);
3612 # Fix up windows-specific substitutions in values
3613 foreach my $k (keys %config) {
3614 if ($config{$k} =~ /\$\{systemroot\}/) {
3615 my $root = &get_windows_root();
3616 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3621 # Record the initial module
3622 $main::initial_module_name ||= $module_name;
3624 # Set some useful variables
3626 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3627 $gconfig{'mobile_theme'} :
3628 defined($gconfig{'theme_'.$remote_user}) ?
3629 $gconfig{'theme_'.$remote_user} :
3630 defined($gconfig{'theme_'.$base_remote_user}) ?
3631 $gconfig{'theme_'.$base_remote_user} :
3633 @current_themes = split(/\s+/, $current_themes);
3634 $current_theme = $current_themes[0];
3635 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3636 $theme_root_directory = $theme_root_directories[0];
3637 @theme_configs = ( );
3638 foreach my $troot (@theme_root_directories) {
3640 &read_file_cached("$troot/config", \%onetconfig);
3641 &read_file_cached("$troot/config", \%tconfig);
3642 push(@theme_configs, \%onetconfig);
3644 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3645 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3647 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3648 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3650 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3651 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3652 if ($tconfig{'preload_functions'}) {
3653 # Force load of theme functions right now, if requested
3654 &load_theme_library();
3656 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3657 # Load the theme's Webmin:: package classes
3658 do "$theme_root_directory/$tconfig{'oofunctions'}";
3663 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3664 : "$var_directory/webmin.log";
3666 # Load language strings into %text
3667 my @langs = &list_languages();
3669 if ($gconfig{'acceptlang'}) {
3670 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3671 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3673 $accepted_lang = $al->{'lang'};
3678 $current_lang = $force_lang ? $force_lang :
3679 $accepted_lang ? $accepted_lang :
3680 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3681 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3682 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3683 foreach my $l (@langs) {
3684 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3686 @lang_order_list = &unique($default_lang,
3687 split(/:/, $current_lang_info->{'fallback'}),
3689 %text = &load_language($module_name);
3690 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3692 # Get the %module_info for this module
3694 my ($mi) = grep { $_->{'dir'} eq $module_name }
3695 &get_all_module_infos(2);
3696 %module_info = %$mi;
3697 $module_root_directory = &module_root_directory($module_name);
3700 if ($module_name && !$main::no_acl_check &&
3701 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3702 # Check if the HTTP user can access this module
3703 if (!&foreign_available($module_name)) {
3704 if (!&foreign_check($module_name)) {
3705 &error(&text('emodulecheck',
3706 "<i>$module_info{'desc'}</i>"));
3709 &error(&text('emodule', "<i>$u</i>",
3710 "<i>$module_info{'desc'}</i>"));
3713 $main::no_acl_check++;
3716 # Check the Referer: header for nasty redirects
3717 my @referers = split(/\s+/, $gconfig{'referers'});
3719 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3722 my $http_host = $ENV{'HTTP_HOST'};
3723 $http_host =~ s/:\d+$//;
3725 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index_cgi) &&
3726 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3727 $unsafe_index_cgi) &&
3728 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3729 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3730 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3731 ($referer_site && $referer_site ne $http_host &&
3732 &indexof($referer_site, @referers) < 0 ||
3733 !$referer_site && $gconfig{'referers_none'}) &&
3734 !$trust_unknown_referers &&
3735 !&get_module_variable('$trust_unknown_referers')) {
3736 # Looks like a link from elsewhere .. show an error
3737 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3739 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3740 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3741 if ($referer_site) {
3743 print &text('referer_warn',
3744 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3746 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3747 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3750 # No referer info given
3751 print &text('referer_warn_unknown', $url),"<p>\n";
3752 print &text('referer_fix1u'),"<p>\n";
3753 print &text('referer_fix2u'),"<p>\n";
3757 &footer("/", $text{'index'});
3760 $main::no_referers_check++;
3761 $main::completed_referers_check++;
3763 # Call theme post-init
3764 if (defined(&theme_post_init_config)) {
3765 &theme_post_init_config(@_);
3768 # Record that we have done the calling library in this package
3769 my ($callpkg, $lib) = caller();
3771 $main::done_foreign_require{$callpkg,$lib} = 1;
3773 # If a licence checking is enabled, do it now
3774 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3775 &foreign_check($gconfig{'licence_module'}) &&
3776 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3777 my $oldpwd = &get_current_dir();
3778 $main::done_licence_module_check++;
3779 $main::licence_module = $gconfig{'licence_module'};
3780 &foreign_require($main::licence_module, "licence_check.pl");
3781 ($main::licence_status, $main::licence_message) =
3782 &foreign_call($main::licence_module, "check_licence");
3786 # Export global variables to caller
3787 if ($main::export_to_caller) {
3788 foreach my $v ('$config_file', '%gconfig', '$null_file',
3789 '$path_separator', '@root_directories',
3790 '$root_directory', '$module_name',
3791 '$base_remote_user', '$remote_user',
3792 '$module_config_directory', '$module_config_file',
3793 '%config', '@current_themes', '$current_theme',
3794 '@theme_root_directories', '$theme_root_directory',
3795 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3796 '$webmin_logfile', '$current_lang',
3797 '$current_lang_info', '@lang_order_list', '%text',
3798 '%module_info', '$module_root_directory') {
3799 my ($vt, $vn) = split('', $v, 2);
3800 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3807 =head2 load_language([module], [directory])
3809 Returns a hashtable mapping text codes to strings in the appropriate language,
3810 based on the $current_lang global variable, which is in turn set based on
3811 the Webmin user's selection. The optional module parameter tells the function
3812 which module to load strings for, and defaults to the calling module. The
3813 optional directory parameter can be used to load strings from a directory
3816 In regular module development you will never need to call this function
3817 directly, as init_config calls it for you, and places the module's strings
3818 into the %text hash.
3824 my $root = $root_directory;
3825 my $ol = $gconfig{'overlang'};
3826 my ($dir) = ($_[1] || "lang");
3828 # Read global lang files
3829 foreach my $o (@lang_order_list) {
3830 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3831 return () if (!$ok && $o eq $default_lang);
3834 foreach my $o (@lang_order_list) {
3835 &read_file_cached("$root/$ol/$o", \%text);
3838 &read_file_cached("$config_directory/custom-lang", \%text);
3841 # Read module's lang files
3842 my $mdir = &module_root_directory($_[0]);
3843 foreach my $o (@lang_order_list) {
3844 &read_file_cached("$mdir/$dir/$o", \%text);
3847 foreach $o (@lang_order_list) {
3848 &read_file_cached("$mdir/$ol/$o", \%text);
3851 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3853 foreach $k (keys %text) {
3854 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3857 if (defined(&theme_load_language)) {
3858 &theme_load_language(\%text, $_[0]);
3863 =head2 text_subs(string)
3865 Used internally by load_language to expand $code substitutions in language
3871 if (substr($_[0], 0, 8) eq "include:") {
3874 open(INCLUDE, substr($_[0], 8));
3882 my $t = $_[1]->{$_[0]};
3883 return defined($t) ? $t : '$'.$_[0];
3887 =head2 text(message, [substitute]+)
3889 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3890 the substitute parameters. This makes it easy to use strings with placeholders
3891 that get replaced with programmatically generated text. For example :
3893 print &text('index_hello', $remote_user),"<p>\n";
3898 my $t = &get_module_variable('%text', 1);
3899 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3900 for(my $i=1; $i<@_; $i++) {
3901 $rv =~ s/\$$i/$_[$i]/g;
3906 =head2 encode_base64(string)
3908 Encodes a string into base64 format, for use in MIME email or HTTP
3909 authorization headers.
3915 pos($_[0]) = 0; # ensure start at the beginning
3916 while ($_[0] =~ /(.{1,57})/gs) {
3917 $res .= substr(pack('u57', $1), 1)."\n";
3920 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3921 my $padding = (3 - length($_[0]) % 3) % 3;
3922 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3926 =head2 decode_base64(string)
3928 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3935 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3936 if (length($str) % 4) {
3939 $str =~ s/=+$//; # remove padding
3940 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3941 while ($str =~ /(.{1,60})/gs) {
3942 my $len = chr(32 + length($1)*3/4); # compute length byte
3943 $res .= unpack("u", $len . $1 ); # uudecode
3948 =head2 get_module_info(module, [noclone], [forcache])
3950 Returns a hash containg details of the given module. Some useful keys are :
3952 =item dir - The module directory, like sendmail.
3954 =item desc - Human-readable description, in the current users' language.
3956 =item version - Optional module version number.
3958 =item os_support - List of supported operating systems and versions.
3960 =item category - Category on Webmin's left menu, like net.
3965 return () if ($_[0] =~ /^\./);
3966 my (%rv, $clone, $o);
3967 my $mdir = &module_root_directory($_[0]);
3968 &read_file_cached("$mdir/module.info", \%rv) || return ();
3970 foreach $o (@lang_order_list) {
3971 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
3972 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
3974 if ($clone && !$_[1] && $config_directory) {
3975 $rv{'clone'} = $rv{'desc'};
3976 &read_file("$config_directory/$_[0]/clone", \%rv);
3979 my %module_categories;
3980 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
3981 my $pn = &get_product_name();
3982 if (defined($rv{'category_'.$pn})) {
3983 # Can override category for webmin/usermin
3984 $rv{'category'} = $rv{'category_'.$pn};
3986 $rv{'realcategory'} = $rv{'category'};
3987 $rv{'category'} = $module_categories{$_[0]}
3988 if (defined($module_categories{$_[0]}));
3990 # Apply description overrides
3991 $rv{'realdesc'} = $rv{'desc'};
3993 &read_file_cached("$config_directory/webmin.descs", \%descs);
3994 if ($descs{$_[0]." ".$current_lang}) {
3995 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
3997 elsif ($descs{$_[0]}) {
3998 $rv{'desc'} = $descs{$_[0]};
4002 # Apply per-user description overridde
4003 my %gaccess = &get_module_acl(undef, "");
4004 if ($gaccess{'desc_'.$_[0]}) {
4005 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4009 if ($rv{'longdesc'}) {
4010 # All standard modules have an index.cgi
4011 $rv{'index_link'} = 'index.cgi';
4014 # Call theme-specific override function
4015 if (defined(&theme_get_module_info)) {
4016 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4022 =head2 get_all_module_infos(cachemode)
4024 Returns a list contains the information on all modules in this webmin
4025 install, including clones. Uses caching to reduce the number of module.info
4026 files that need to be read. Each element of the array is a hash reference
4027 in the same format as returned by get_module_info. The cache mode flag can be :
4028 0 = read and write, 1 = don't read or write, 2 = read only
4031 sub get_all_module_infos
4035 # Is the cache out of date? (ie. have any of the root's changed?)
4036 my $cache_file = "$config_directory/module.infos.cache";
4038 if (&read_file_cached($cache_file, \%cache)) {
4039 foreach my $r (@root_directories) {
4041 if ($st[9] != $cache{'mtime_'.$r}) {
4051 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4052 # Can use existing module.info cache
4054 foreach my $k (keys %cache) {
4055 if ($k =~ /^(\S+) (\S+)$/) {
4056 $mods{$1}->{$2} = $cache{$k};
4059 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4062 # Need to rebuild cache
4064 foreach my $r (@root_directories) {
4066 foreach my $m (readdir(DIR)) {
4067 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4068 my %minfo = &get_module_info($m, 0, 1);
4069 next if (!%minfo || !$minfo{'dir'});
4071 foreach $k (keys %minfo) {
4072 $cache{"${m} ${k}"} = $minfo{$k};
4077 $cache{'mtime_'.$r} = $st[9];
4079 $cache{'lang'} = $current_lang;
4080 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4083 # Override descriptions for modules for current user
4084 my %gaccess = &get_module_acl(undef, "");
4085 foreach my $m (@rv) {
4086 if ($gaccess{"desc_".$m->{'dir'}}) {
4087 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4091 # Apply installed flags
4093 &read_file_cached("$config_directory/installed.cache", \%installed);
4094 foreach my $m (@rv) {
4095 $m->{'installed'} = $installed{$m->{'dir'}};
4101 =head2 get_theme_info(theme)
4103 Returns a hash containing a theme's details, taken from it's theme.info file.
4104 Some useful keys are :
4106 =item dir - The theme directory, like blue-theme.
4108 =item desc - Human-readable description, in the current users' language.
4110 =item version - Optional module version number.
4112 =item os_support - List of supported operating systems and versions.
4117 return () if ($_[0] =~ /^\./);
4119 my $tdir = &module_root_directory($_[0]);
4120 &read_file("$tdir/theme.info", \%rv) || return ();
4121 foreach my $o (@lang_order_list) {
4122 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4128 =head2 list_languages
4130 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4131 Each is a hash reference with the following keys :
4133 =item lang - The short language code, like es for Spanish.
4135 =item desc - A human-readable description, in English.
4137 =item charset - An optional character set to use when displaying the language.
4139 =item titles - Set to 1 only if Webmin has title images for the language.
4141 =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.
4146 if (!@main::list_languages_cache) {
4149 open(LANG, "$root_directory/lang_list.txt");
4151 if (/^(\S+)\s+(.*)/) {
4152 my $l = { 'desc' => $2 };
4153 foreach $o (split(/,/, $1)) {
4154 if ($o =~ /^([^=]+)=(.*)$/) {
4158 $l->{'index'} = scalar(@rv);
4159 push(@main::list_languages_cache, $l);
4163 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4164 @main::list_languages_cache;
4166 return @main::list_languages_cache;
4169 =head2 read_env_file(file, &hash)
4171 Similar to Webmin's read_file function, but handles files containing shell
4172 environment variables formatted like :
4177 The file parameter is the full path to the file to read, and hash a Perl hash
4178 ref to read names and values into.
4184 &open_readfile(FILE, $_[0]) || return 0;
4187 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4188 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4189 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4197 =head2 write_env_file(file, &hash, [export])
4199 Writes out a hash to a file in name='value' format, suitable for use in a shell
4200 script. The parameters are :
4202 =item file - Full path for a file to write to
4204 =item hash - Hash reference of names and values to write.
4206 =item export - If set to 1, preceed each variable setting with the word 'export'.
4211 my $exp = $_[2] ? "export " : "";
4212 &open_tempfile(FILE, ">$_[0]");
4213 foreach my $k (keys %{$_[1]}) {
4214 my $v = $_[1]->{$k};
4215 if ($v =~ /^\S+$/) {
4216 &print_tempfile(FILE, "$exp$k=$v\n");
4219 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4222 &close_tempfile(FILE);
4225 =head2 lock_file(filename, [readonly], [forcefile])
4227 Lock a file for exclusive access. If the file is already locked, spin
4228 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4229 to work OK. The parameters are :
4231 =item filename - File or directory to lock.
4233 =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.
4235 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4240 my $realfile = &translate_filename($_[0]);
4241 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4242 my $no_lock = !&can_lock_file($realfile);
4243 my $lock_tries_count = 0;
4246 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4251 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4254 # Create the .lock file
4255 open(LOCKING, ">$realfile.lock") || return 0;
4256 my $lck = eval "flock(LOCKING, 2+4)";
4258 # Lock of lock file failed! Wait till later
4261 print LOCKING $$,"\n";
4262 eval "flock(LOCKING, 8)";
4265 $main::locked_file_list{$realfile} = int($_[1]);
4266 push(@main::temporary_files, "$realfile.lock");
4267 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4268 !&get_module_variable('$no_log_file_changes') &&
4270 # Grab a copy of this file for later diffing
4272 $main::locked_file_data{$realfile} = undef;
4274 $main::locked_file_type{$realfile} = 1;
4275 $main::locked_file_data{$realfile} = '';
4277 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4278 $main::locked_file_type{$realfile} = 2;
4279 $main::locked_file_data{$realfile} = $lnk;
4281 elsif (open(ORIGFILE, $realfile)) {
4282 $main::locked_file_type{$realfile} = 0;
4283 $main::locked_file_data{$realfile} = '';
4286 $main::locked_file_data{$realfile} .=$_;
4295 if ($lock_tries_count++ > 5*60) {
4296 # Give up after 5 minutes
4297 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4303 =head2 unlock_file(filename)
4305 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4306 file changes is enabled, then at unlock file a diff will be taken between the
4307 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4308 called. This can then be viewed in the Webmin Actions Log module.
4313 my $realfile = &translate_filename($_[0]);
4314 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4315 unlink("$realfile.lock") if (&can_lock_file($realfile));
4316 delete($main::locked_file_list{$realfile});
4317 if (exists($main::locked_file_data{$realfile})) {
4318 # Diff the new file with the old
4320 my $lnk = readlink($realfile);
4321 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4322 my $oldtype = $main::locked_file_type{$realfile};
4323 my $new = !defined($main::locked_file_data{$realfile});
4324 if ($new && !-e _) {
4325 # file doesn't exist, and never did! do nothing ..
4327 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4328 # is (or was) a directory ..
4329 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4330 push(@main::locked_file_diff,
4331 { 'type' => 'mkdir', 'object' => $realfile });
4333 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4334 push(@main::locked_file_diff,
4335 { 'type' => 'rmdir', 'object' => $realfile });
4338 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4339 # is (or was) a symlink ..
4340 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4341 push(@main::locked_file_diff,
4342 { 'type' => 'symlink', 'object' => $realfile,
4345 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4346 push(@main::locked_file_diff,
4347 { 'type' => 'unsymlink', 'object' => $realfile,
4348 'data' => $main::locked_file_data{$realfile} });
4350 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4351 push(@main::locked_file_diff,
4352 { 'type' => 'resymlink', 'object' => $realfile,
4357 # is a file, or has changed type?!
4358 my ($diff, $delete_file);
4359 my $type = "modify";
4361 open(NEWFILE, ">$realfile");
4366 if (!defined($main::locked_file_data{$realfile})) {
4369 open(ORIGFILE, ">$realfile.webminorig");
4370 print ORIGFILE $main::locked_file_data{$realfile};
4372 $diff = &backquote_command(
4373 "diff ".quotemeta("$realfile.webminorig")." ".
4374 quotemeta($realfile)." 2>/dev/null");
4375 push(@main::locked_file_diff,
4376 { 'type' => $type, 'object' => $realfile,
4377 'data' => $diff } ) if ($diff);
4378 unlink("$realfile.webminorig");
4379 unlink($realfile) if ($delete_file);
4382 if ($gconfig{'logfullfiles'}) {
4383 # Add file details to list of those to fully log
4384 $main::orig_file_data{$realfile} ||=
4385 $main::locked_file_data{$realfile};
4386 $main::orig_file_type{$realfile} ||=
4387 $main::locked_file_type{$realfile};
4390 delete($main::locked_file_data{$realfile});
4391 delete($main::locked_file_type{$realfile});
4395 =head2 test_lock(file)
4397 Returns 1 if some file is currently locked, 0 if not.
4402 my $realfile = &translate_filename($_[0]);
4403 return 0 if (!$_[0]);
4404 return 1 if (defined($main::locked_file_list{$realfile}));
4405 return 0 if (!&can_lock_file($realfile));
4407 if (open(LOCKING, "$realfile.lock")) {
4412 return $pid && kill(0, $pid);
4415 =head2 unlock_all_files
4417 Unlocks all files locked by the current script.
4420 sub unlock_all_files
4422 foreach $f (keys %main::locked_file_list) {
4427 =head2 can_lock_file(file)
4429 Returns 1 if some file should be locked, based on the settings in the
4430 Webmin Configuration module. For internal use by lock_file only.
4435 if (&is_readonly_mode()) {
4436 return 0; # never lock in read-only mode
4438 elsif ($gconfig{'lockmode'} == 0) {
4441 elsif ($gconfig{'lockmode'} == 1) {
4445 # Check if under any of the directories
4447 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4448 if (&same_file($d, $_[0]) ||
4449 &is_under_directory($d, $_[0])) {
4453 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4457 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4459 Log some action taken by a user. This is typically called at the end of a
4460 script, once all file changes are complete and all commands run. The
4463 =item action - A short code for the action being performed, like 'create'.
4465 =item type - A code for the type of object the action is performed to, like 'user'.
4467 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4469 =item params - A hash ref of additional information about the action.
4471 =item module - Name of the module in which the action was performed, which defaults to the current module.
4473 =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.
4475 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4477 =item client-ip - IP address of the browser that performed the action.
4482 return if (!$gconfig{'log'} || &is_readonly_mode());
4483 my $m = $_[4] ? $_[4] : &get_module_name();
4485 if ($gconfig{'logclear'}) {
4486 # check if it is time to clear the log
4487 my @st = stat("$webmin_logfile.time");
4488 my $write_logtime = 0;
4490 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4491 # clear logfile and all diff files
4492 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4493 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4494 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4495 unlink($webmin_logfile);
4502 if ($write_logtime) {
4503 open(LOGTIME, ">$webmin_logfile.time");
4504 print LOGTIME time(),"\n";
4509 # If an action script directory is defined, call the appropriate scripts
4510 if ($gconfig{'action_script_dir'}) {
4511 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4512 my ($basedir) = $gconfig{'action_script_dir'};
4514 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4517 opendir(DIR, $dir) or die "Can't open $dir: $!";
4518 while (defined($file = readdir(DIR))) {
4519 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4520 if (-x "$dir/$file") {
4521 # Call a script notifying it of the action
4523 $ENV{'ACTION_MODULE'} = &get_module_name();
4524 $ENV{'ACTION_ACTION'} = $_[0];
4525 $ENV{'ACTION_TYPE'} = $_[1];
4526 $ENV{'ACTION_OBJECT'} = $_[2];
4527 $ENV{'ACTION_SCRIPT'} = $script_name;
4528 foreach my $p (keys %param) {
4529 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4531 system("$dir/$file", @_,
4532 "<$null_file", ">$null_file", "2>&1");
4540 # should logging be done at all?
4541 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4542 split(/\s+/, $gconfig{'logusers'})) < 0);
4543 return if ($gconfig{'logmodules'} && &indexof($m,
4544 split(/\s+/, $gconfig{'logmodules'})) < 0);
4548 my @tm = localtime($now);
4549 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4550 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4551 $main::action_id_count++;
4552 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4553 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4554 $tm[2], $tm[1], $tm[0],
4555 $remote_user || '-',
4556 $main::session_id || '-',
4557 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4558 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4559 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4561 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4562 my $v = $_[3]->{$k};
4568 elsif (ref($v) eq 'ARRAY') {
4572 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4573 $line .= " $k='$vv'";
4577 foreach $vv (split(/\0/, $v)) {
4579 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4580 $line .= " $k='$vv'";
4583 $param{$k} = join(" ", @pv);
4585 open(WEBMINLOG, ">>$webmin_logfile");
4586 print WEBMINLOG $line,"\n";
4588 if ($gconfig{'logperms'}) {
4589 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4592 chmod(0600, $webmin_logfile);
4595 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4596 # Find and record the changes made to any locked files, or commands run
4598 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4599 foreach my $d (@main::locked_file_diff) {
4600 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4601 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4602 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4603 print DIFFLOG $d->{'data'};
4605 if ($d->{'input'}) {
4606 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4607 print DIFFLOG $d->{'input'};
4610 if ($gconfig{'logperms'}) {
4611 chmod(oct($gconfig{'logperms'}),
4612 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4613 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4617 @main::locked_file_diff = undef;
4619 if ($gconfig{'logfullfiles'}) {
4620 # Save the original contents of any modified files
4622 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4623 foreach my $f (keys %main::orig_file_data) {
4624 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4625 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4626 if (!defined($main::orig_file_type{$f})) {
4627 print ORIGLOG -1," ",$f,"\n";
4630 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4632 print ORIGLOG $main::orig_file_data{$f};
4634 if ($gconfig{'logperms'}) {
4635 chmod(oct($gconfig{'logperms'}),
4636 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4640 %main::orig_file_data = undef;
4641 %main::orig_file_type = undef;
4645 if ($gconfig{'logsyslog'}) {
4646 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4647 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4648 setlogsock("inet");';
4650 # Syslog module is installed .. try to convert to a
4651 # human-readable form
4653 my $mod = &get_module_name();
4654 my $mdir = module_root_directory($mod);
4655 if (-r "$mdir/log_parser.pl") {
4656 &foreign_require($mod, "log_parser.pl");
4658 foreach my $k (keys %{$_[3]}) {
4659 my $v = $_[3]->{$k};
4660 if (ref($v) eq 'ARRAY') {
4661 $params{$k} = join("\0", @$v);
4667 $msg = &foreign_call($mod, "parse_webmin_log",
4668 $remote_user, $script_name,
4669 $_[0], $_[1], $_[2], \%params);
4670 $msg =~ s/<[^>]*>//g; # Remove tags
4672 elsif ($_[0] eq "_config_") {
4673 my %wtext = &load_language("webminlog");
4674 $msg = $wtext{'search_config'};
4676 $msg ||= "$_[0] $_[1] $_[2]";
4677 my %info = &get_module_info($m);
4678 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4683 =head2 additional_log(type, object, data, [input])
4685 Records additional log data for an upcoming call to webmin_log, such
4686 as a command that was run or SQL that was executed. Typically you will never
4687 need to call this function directory.
4692 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4693 push(@main::locked_file_diff,
4694 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4695 'input' => $_[3] } );
4699 =head2 webmin_debug_log(type, message)
4701 Write something to the Webmin debug log. For internal use only.
4704 sub webmin_debug_log
4706 my ($type, $msg) = @_;
4707 return 0 if (!$main::opened_debug_log);
4708 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4710 my @tm = localtime($now);
4712 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4713 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4714 $tm[2], $tm[1], $tm[0],
4715 $remote_user || "-",
4716 $ENV{'REMOTE_HOST'} || "-",
4717 &get_module_name() || "-",
4720 seek(main::DEBUGLOG, 0, 2);
4721 print main::DEBUGLOG $line."\n";
4725 =head2 system_logged(command)
4727 Just calls the Perl system() function, but also logs the command run.
4732 if (&is_readonly_mode()) {
4733 print STDERR "Vetoing command $_[0]\n";
4736 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4737 my $cmd = join(" ", @realcmd);
4739 if ($cmd =~ s/(\s*&\s*)$//) {
4742 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4743 $cmd =~ s/^\((.*)\)\s*$/$1/;
4745 &additional_log('exec', undef, $cmd);
4746 return system(@realcmd);
4749 =head2 backquote_logged(command)
4751 Executes a command and returns the output (like `command`), but also logs it.
4754 sub backquote_logged
4756 if (&is_readonly_mode()) {
4758 print STDERR "Vetoing command $_[0]\n";
4761 my $realcmd = &translate_command($_[0]);
4764 if ($cmd =~ s/(\s*&\s*)$//) {
4767 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4768 $cmd =~ s/^\((.*)\)\s*$/$1/;
4770 &additional_log('exec', undef, $cmd);
4771 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4775 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4777 Runs some command, waiting at most the given number of seconds for it to
4778 complete, and returns the output. The maxlines parameter sets the number
4779 of lines of output to capture. The safe parameter should be set to 1 if the
4780 command is safe for read-only mode users to run.
4783 sub backquote_with_timeout
4785 my $realcmd = &translate_command($_[0]);
4786 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4787 if ($gconfig{'debug_what_cmd'});
4789 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4794 my $elapsed = time() - $start;
4795 last if ($elapsed > $_[1]);
4797 vec($rmask, fileno(OUT), 1) = 1;
4798 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4799 last if (!$sel || $sel < 0);
4801 last if (!defined($line));
4804 if ($_[3] && $linecount >= $_[3]) {
4809 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4813 return wantarray ? ($out, $timed_out) : $out;
4816 =head2 backquote_command(command, safe?)
4818 Executes a command and returns the output (like `command`), subject to
4819 command translation. The safe parameter should be set to 1 if the command
4820 is safe for read-only mode users to run.
4823 sub backquote_command
4825 if (&is_readonly_mode() && !$_[1]) {
4826 print STDERR "Vetoing command $_[0]\n";
4830 my $realcmd = &translate_command($_[0]);
4831 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4835 =head2 kill_logged(signal, pid, ...)
4837 Like Perl's built-in kill function, but also logs the fact that some process
4838 was killed. On Windows, falls back to calling process.exe to terminate a
4844 return scalar(@_)-1 if (&is_readonly_mode());
4845 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4846 if ($gconfig{'debug_what_procs'});
4847 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4848 if ($gconfig{'os_type'} eq 'windows') {
4849 # Emulate some kills with process.exe
4850 my $arg = $_[0] eq "KILL" ? "-k" :
4851 $_[0] eq "TERM" ? "-q" :
4852 $_[0] eq "STOP" ? "-s" :
4853 $_[0] eq "CONT" ? "-r" : undef;
4855 foreach my $p (@_[1..@_-1]) {
4857 $ok ||= kill($_[0], $p);
4860 &execute_command("process $arg $p");
4872 =head2 rename_logged(old, new)
4874 Re-names a file and logs the rename. If the old and new files are on different
4875 filesystems, calls mv or the Windows rename function to do the job.
4880 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4881 return &rename_file($_[0], $_[1]);
4884 =head2 rename_file(old, new)
4886 Renames a file or directory. If the old and new files are on different
4887 filesystems, calls mv or the Windows rename function to do the job.
4892 if (&is_readonly_mode()) {
4893 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4896 my $src = &translate_filename($_[0]);
4897 my $dst = &translate_filename($_[1]);
4898 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4899 if ($gconfig{'debug_what_ops'});
4900 my $ok = rename($src, $dst);
4901 if (!$ok && $! !~ /permission/i) {
4902 # Try the mv command, in case this is a cross-filesystem rename
4903 if ($gconfig{'os_type'} eq 'windows') {
4904 # Need to use rename
4905 my $out = &backquote_command("rename ".quotemeta($_[0]).
4906 " ".quotemeta($_[1])." 2>&1");
4908 $! = $out if (!$ok);
4912 my $out = &backquote_command("mv ".quotemeta($_[0]).
4913 " ".quotemeta($_[1])." 2>&1");
4915 $! = $out if (!$ok);
4921 =head2 symlink_logged(src, dest)
4923 Create a symlink, and logs it. Effectively does the same thing as the Perl
4930 my $rv = &symlink_file($_[0], $_[1]);
4931 &unlock_file($_[1]);
4935 =head2 symlink_file(src, dest)
4937 Creates a soft link, unless in read-only mode. Effectively does the same thing
4938 as the Perl symlink function.
4943 if (&is_readonly_mode()) {
4944 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4947 my $src = &translate_filename($_[0]);
4948 my $dst = &translate_filename($_[1]);
4949 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
4950 if ($gconfig{'debug_what_ops'});
4951 return symlink($src, $dst);
4954 =head2 link_file(src, dest)
4956 Creates a hard link, unless in read-only mode. The existing new link file
4957 will be deleted if necessary. Effectively the same as Perl's link function.
4962 if (&is_readonly_mode()) {
4963 print STDERR "Vetoing link from $_[0] to $_[1]\n";
4966 my $src = &translate_filename($_[0]);
4967 my $dst = &translate_filename($_[1]);
4968 &webmin_debug_log('LINK', "src=$src dst=$dst")
4969 if ($gconfig{'debug_what_ops'});
4970 unlink($dst); # make sure link works
4971 return link($src, $dst);
4974 =head2 make_dir(dir, perms, recursive)
4976 Creates a directory and sets permissions on it, unless in read-only mode.
4977 The perms parameter sets the octal permissions to apply, which unlike Perl's
4978 mkdir will really get set. The recursive flag can be set to 1 to have the
4979 function create parent directories too.
4984 my ($dir, $perms, $recur) = @_;
4985 if (&is_readonly_mode()) {
4986 print STDERR "Vetoing directory $dir\n";
4989 $dir = &translate_filename($dir);
4990 my $exists = -d $dir ? 1 : 0;
4991 return 1 if ($exists && $recur); # already exists
4992 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
4993 my $rv = mkdir($dir, $perms);
4994 if (!$rv && $recur) {
4995 # Failed .. try mkdir -p
4996 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
4997 my $ex = &execute_command("mkdir $param "."e_path($dir));
5003 chmod($perms, $dir);
5008 =head2 set_ownership_permissions(user, group, perms, file, ...)
5010 Sets the user, group owner and permissions on some files. The parameters are :
5012 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5014 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5016 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5018 =item file - One or more files or directories to modify.
5021 sub set_ownership_permissions
5023 my ($user, $group, $perms, @files) = @_;
5024 if (&is_readonly_mode()) {
5025 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5028 @files = map { &translate_filename($_) } @files;
5029 if ($gconfig{'debug_what_ops'}) {
5030 foreach my $f (@files) {
5031 &webmin_debug_log('PERMS',
5032 "file=$f user=$user group=$group perms=$perms");
5036 if (defined($user)) {
5037 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5039 if (defined($group)) {
5040 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5043 my @uinfo = getpwuid($uid);
5046 $rv = chown($uid, $gid, @files);
5048 if ($rv && defined($perms)) {
5049 $rv = chmod($perms, @files);
5054 =head2 unlink_logged(file, ...)
5056 Like Perl's unlink function, but locks the files beforehand and un-locks them
5057 after so that the deletion is logged by Webmin.
5063 foreach my $f (@_) {
5064 if (!&test_lock($f)) {
5069 my @rv = &unlink_file(@_);
5070 foreach my $f (@_) {
5075 return wantarray ? @rv : $rv[0];
5078 =head2 unlink_file(file, ...)
5080 Deletes some files or directories. Like Perl's unlink function, but also
5081 recursively deletes directories with the rm command if needed.
5086 return 1 if (&is_readonly_mode());
5089 foreach my $f (@_) {
5090 my $realf = &translate_filename($f);
5091 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5093 if (!rmdir($realf)) {
5094 if ($gconfig{'os_type'} eq 'windows') {
5095 # Call del and rmdir commands
5098 my $out = `del /q "$qm" 2>&1`;
5100 $out = `rmdir "$qm" 2>&1`;
5105 my $qm = quotemeta($realf);
5106 my $out = `rm -rf $qm 2>&1`;
5115 if (!unlink($realf)) {
5121 return wantarray ? ($rv, $err) : $rv;
5124 =head2 copy_source_dest(source, dest)
5126 Copy some file or directory to a new location. Returns 1 on success, or 0
5127 on failure - also sets $! on failure. If the source is a directory, uses
5128 piped tar commands to copy a whole directory structure including permissions
5132 sub copy_source_dest
5134 return (1, undef) if (&is_readonly_mode());
5135 my ($src, $dst) = @_;
5138 &webmin_debug_log('COPY', "src=$src dst=$dst")
5139 if ($gconfig{'debug_what_ops'});
5140 if ($gconfig{'os_type'} eq 'windows') {
5141 # No tar or cp on windows, so need to use copy command
5145 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5148 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5156 # A directory .. need to copy with tar command
5157 my @st = stat($src);
5160 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5161 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5168 # Can just copy with cp
5169 my $out = &backquote_logged("cp -p ".quotemeta($src).
5170 " ".quotemeta($dst)." 2>&1");
5176 return wantarray ? ($ok, $err) : $ok;
5179 =head2 remote_session_name(host|&server)
5181 Generates a session ID for some server. For this server, this will always
5182 be an empty string. For a server object it will include the hostname and
5183 port and PID. For a server name, it will include the hostname and PID. For
5187 sub remote_session_name
5189 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5190 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5191 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5192 ref($_[0]) ? "" : "$_[0].$$";
5195 =head2 remote_foreign_require(server, module, file)
5197 Connects to rpc.cgi on a remote webmin server and have it open a session
5198 to a process that will actually do the require and run functions. This is the
5199 equivalent for foreign_require, but for a remote Webmin system. The server
5200 parameter can either be a hostname of a system registered in the Webmin
5201 Servers Index module, or a hash reference for a system from that module.
5204 sub remote_foreign_require
5206 my $call = { 'action' => 'require',
5209 my $sn = &remote_session_name($_[0]);
5210 if ($remote_session{$sn}) {
5211 $call->{'session'} = $remote_session{$sn};
5214 $call->{'newsession'} = 1;
5216 my $rv = &remote_rpc_call($_[0], $call);
5217 if ($rv->{'session'}) {
5218 $remote_session{$sn} = $rv->{'session'};
5219 $remote_session_server{$sn} = $_[0];
5223 =head2 remote_foreign_call(server, module, function, [arg]*)
5225 Call a function on a remote server. Must have been setup first with
5226 remote_foreign_require for the same server and module. Equivalent to
5227 foreign_call, but with the extra server parameter to specify the remote
5231 sub remote_foreign_call
5233 return undef if (&is_readonly_mode());
5234 my $sn = &remote_session_name($_[0]);
5235 return &remote_rpc_call($_[0], { 'action' => 'call',
5238 'session' => $remote_session{$sn},
5239 'args' => [ @_[3 .. $#_] ] } );
5242 =head2 remote_foreign_check(server, module, [api-only])
5244 Checks if some module is installed and supported on a remote server. Equivilant
5245 to foreign_check, but for the remote Webmin system specified by the server
5249 sub remote_foreign_check
5251 return &remote_rpc_call($_[0], { 'action' => 'check',
5256 =head2 remote_foreign_config(server, module)
5258 Gets the configuration for some module from a remote server, as a hash.
5259 Equivalent to foreign_config, but for a remote system.
5262 sub remote_foreign_config
5264 return &remote_rpc_call($_[0], { 'action' => 'config',
5265 'module' => $_[1] });
5268 =head2 remote_eval(server, module, code)
5270 Evaluates some perl code in the context of a module on a remote webmin server.
5271 The server parameter must be the hostname of a remote system, module must
5272 be a module directory name, and code a string of Perl code to run. This can
5273 only be called after remote_foreign_require for the same server and module.
5278 return undef if (&is_readonly_mode());
5279 my $sn = &remote_session_name($_[0]);
5280 return &remote_rpc_call($_[0], { 'action' => 'eval',
5283 'session' => $remote_session{$sn} });
5286 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5288 Transfers some local file to another server via Webmin's RPC protocol, and
5289 returns the resulting remote filename. If the remotefile parameter is given,
5290 that is the destination filename which will be used. Otherwise a randomly
5291 selected temporary filename will be used, and returned by the function.
5296 return undef if (&is_readonly_mode());
5298 my $sn = &remote_session_name($_[0]);
5299 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5300 # Copy data over TCP connection
5301 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5303 'name' => $_[3] } );
5305 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5306 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5307 return &$main::remote_error_handler("Failed to transfer file : $error")
5310 while(read(FILE, $got, 1024) > 0) {
5314 shutdown(TWRITE, 1);
5316 if ($error && $error !~ /^OK/) {
5317 # Got back an error!
5318 return &$main::remote_error_handler("Failed to transfer file : $error");
5324 # Just pass file contents as parameters
5326 while(read(FILE, $got, 1024) > 0) {
5330 return &remote_rpc_call($_[0], { 'action' => 'write',
5333 'session' => $remote_session{$sn} });
5337 =head2 remote_read(server, localfile, remotefile)
5339 Transfers a file from a remote server to this system, using Webmin's RPC
5340 protocol. The server parameter must be the hostname of a system registered
5341 in the Webmin Servers Index module, localfile is the destination path on this
5342 system, and remotefile is the file to fetch from the remote server.
5347 my $sn = &remote_session_name($_[0]);
5348 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5349 # Copy data over TCP connection
5350 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5351 'file' => $_[2] } );
5353 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5356 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5357 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5358 return &$main::remote_error_handler("Failed to transfer file : $error")
5361 open(FILE, ">$_[1]");
5362 while(read(TREAD, $got, 1024) > 0) {
5369 # Just get data as return value
5370 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5372 'session' => $remote_session{$sn} });
5373 open(FILE, ">$_[1]");
5379 =head2 remote_finished
5381 Close all remote sessions. This happens automatically after a while
5382 anyway, but this function should be called to clean things up faster.
5387 foreach my $sn (keys %remote_session) {
5388 my $server = $remote_session_server{$sn};
5389 &remote_rpc_call($server, { 'action' => 'quit',
5390 'session' => $remote_session{$sn} } );
5391 delete($remote_session{$sn});
5392 delete($remote_session_server{$sn});
5394 foreach $fh (keys %fast_fh_cache) {
5396 delete($fast_fh_cache{$fh});
5400 =head2 remote_error_setup(&function)
5402 Sets a function to be called instead of &error when a remote RPC operation
5403 fails. Useful if you want to have more control over your remote operations.
5406 sub remote_error_setup
5408 $main::remote_error_handler = $_[0] || \&error;
5411 =head2 remote_rpc_call(server, structure)
5413 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5414 and then reads back a reply structure. This is mainly for internal use only,
5415 and is called by the other remote_* functions.
5421 my $sn = &remote_session_name($_[0]);
5423 # Server structure was given
5425 $serv->{'user'} || !$sn || return &$main::remote_error_handler(
5426 "No login set for server");
5429 # lookup the server in the webmin servers module if needed
5430 if (!defined(%main::remote_servers_cache)) {
5431 &foreign_require("servers", "servers-lib.pl");
5432 foreach $s (&foreign_call("servers", "list_servers")) {
5433 $main::remote_servers_cache{$s->{'host'}} = $s;
5434 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5437 $serv = $main::remote_servers_cache{$_[0]};
5438 $serv || return &$main::remote_error_handler(
5439 "No Webmin Servers entry for $_[0]");
5440 $serv->{'user'} || return &$main::remote_error_handler(
5441 "No login set for server $_[0]");
5444 # Work out the username and password
5446 if ($serv->{'sameuser'}) {
5447 $user = $remote_user;
5448 defined($main::remote_pass) || return &$main::remote_error_handler(
5449 "Password for this server is not available");
5450 $pass = $main::remote_pass;
5453 $user = $serv->{'user'};
5454 $pass = $serv->{'pass'};
5457 if ($serv->{'fast'} || !$sn) {
5458 # Make TCP connection call to fastrpc.cgi
5459 if (!$fast_fh_cache{$sn} && $sn) {
5460 # Need to open the connection
5461 my $con = &make_http_connection(
5462 $serv->{'host'}, $serv->{'port'}, $serv->{'ssl'},
5463 "POST", "/fastrpc.cgi");
5464 return &$main::remote_error_handler(
5465 "Failed to connect to $serv->{'host'} : $con")
5467 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5468 &write_http_connection($con, "User-agent: Webmin\r\n");
5469 my $auth = &encode_base64("$user:$pass");
5471 &write_http_connection($con, "Authorization: basic $auth\r\n");
5472 &write_http_connection($con, "Content-length: ",
5473 length($tostr),"\r\n");
5474 &write_http_connection($con, "\r\n");
5475 &write_http_connection($con, $tostr);
5477 # read back the response
5478 my $line = &read_http_connection($con);
5479 $line =~ tr/\r\n//d;
5480 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5481 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5483 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5484 return &$main::remote_error_handler("HTTP error : $line");
5486 $line = &read_http_connection($con);
5487 $line =~ tr/\r\n//d;
5489 $line = &read_http_connection($con);
5490 if ($line =~ /^0\s+(.*)/) {
5491 return &$main::remote_error_handler("RPC error : $1");
5493 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5494 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5495 # Started ok .. connect and save SID
5496 &close_http_connection($con);
5497 my ($port, $sid, $version, $error) = ($1, $2, $3);
5498 &open_socket($serv->{'host'}, $port, $sid, \$error);
5499 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5501 $fast_fh_cache{$sn} = $sid;
5502 $remote_server_version{$sn} = $version;
5505 while($stuff = &read_http_connection($con)) {
5508 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5511 elsif (!$fast_fh_cache{$sn}) {
5512 # Open the connection by running fastrpc.cgi locally
5513 pipe(RPCOUTr, RPCOUTw);
5517 open(STDOUT, ">&RPCOUTw");
5521 $ENV{'REQUEST_METHOD'} = 'GET';
5522 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5523 $ENV{'SERVER_ROOT'} ||= $root_directory;
5525 if ($base_remote_user ne 'root' &&
5526 $base_remote_user ne 'admin') {
5527 # Need to fake up a login for the CGI!
5528 &read_acl(undef, \%acl);
5529 $ENV{'BASE_REMOTE_USER'} =
5530 $ENV{'REMOTE_USER'} =
5531 $acl{'root'} ? 'root' : 'admin';
5533 delete($ENV{'FOREIGN_MODULE_NAME'});
5534 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5535 chdir($root_directory);
5536 if (!exec("$root_directory/fastrpc.cgi")) {
5537 print "exec failed : $!\n";
5544 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5548 if ($line =~ /^0\s+(.*)/) {
5549 return &$main::remote_error_handler("RPC error : $2");
5551 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5552 # Started ok .. connect and save SID
5554 my ($port, $sid, $error) = ($1, $2, undef);
5555 &open_socket("localhost", $port, $sid, \$error);
5556 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5557 $fast_fh_cache{$sn} = $sid;
5564 &error("Bad response from fastrpc.cgi : $line");
5567 # Got a connection .. send off the request
5568 my $fh = $fast_fh_cache{$sn};
5569 my $tostr = &serialise_variable($_[1]);
5570 print $fh length($tostr)," $fh\n";
5572 my $rlen = int(<$fh>);
5573 my ($fromstr, $got);
5574 while(length($fromstr) < $rlen) {
5575 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5576 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5579 my $from = &unserialise_variable($fromstr);
5581 return &$main::remote_error_handler("Remote Webmin error");
5583 if (defined($from->{'arv'})) {
5584 return @{$from->{'arv'}};
5587 return $from->{'rv'};
5591 # Call rpc.cgi on remote server
5592 my $tostr = &serialise_variable($_[1]);
5594 my $con = &make_http_connection($serv->{'host'}, $serv->{'port'},
5595 $serv->{'ssl'}, "POST", "/rpc.cgi");
5596 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5598 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5599 &write_http_connection($con, "User-agent: Webmin\r\n");
5600 my $auth = &encode_base64("$user:$pass");
5602 &write_http_connection($con, "Authorization: basic $auth\r\n");
5603 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5604 &write_http_connection($con, "\r\n");
5605 &write_http_connection($con, $tostr);
5607 # read back the response
5608 my $line = &read_http_connection($con);
5609 $line =~ tr/\r\n//d;
5610 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5611 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5613 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5615 $line = &read_http_connection($con);
5616 $line =~ tr/\r\n//d;
5619 while($line = &read_http_connection($con)) {
5623 my $from = &unserialise_variable($fromstr);
5624 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5625 if (defined($from->{'arv'})) {
5626 return @{$from->{'arv'}};
5629 return $from->{'rv'};
5634 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5636 Executes some function in parallel on multiple servers at once. Fills in
5637 the returns and errors arrays respectively. If the module and library
5638 parameters are given, that module is remotely required on the server first,
5639 to check if it is connectable. The parameters are :
5641 =item servers - A list of Webmin system hash references.
5643 =item parallel - Number of parallel operations to perform.
5645 =item function - Reference to function to call for each system.
5647 =item args - Additional parameters to the function.
5649 =item returns - Array ref to place return values into, in same order as servers.
5651 =item errors - Array ref to place error messages into.
5653 =item module - Optional module to require on the remote system first.
5655 =item library - Optional library to require in the module.
5658 sub remote_multi_callback
5660 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5661 &remote_error_setup(\&remote_multi_callback_error);
5663 # Call the functions
5665 foreach my $g (@$servs) {
5671 $remote_multi_callback_err = undef;
5673 # Require the remote lib
5674 &remote_foreign_require($g->{'host'}, $mod, $lib);
5675 if ($remote_multi_callback_err) {
5676 # Failed .. return error
5677 print $wh &serialise_variable(
5678 [ undef, $remote_multi_callback_err ]);
5684 my $a = ref($args) ? $args->[$p] : $args;
5685 my $rv = &$func($g, $a);
5688 print $wh &serialise_variable(
5689 [ $rv, $remote_multi_callback_err ]);
5697 # Read back the results
5699 foreach my $g (@$servs) {
5703 $errs->[$p] = "Failed to read response from $g->{'host'}";
5706 my $rv = &unserialise_variable($line);
5708 $rets->[$p] = $rv->[0];
5709 $errs->[$p] = $rv->[1];
5714 &remote_error_setup(undef);
5717 sub remote_multi_callback_error
5719 $remote_multi_callback_err = $_[0];
5722 =head2 serialise_variable(variable)
5724 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5725 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5726 called on each member to serialize the entire object.
5729 sub serialise_variable
5731 if (!defined($_[0])) {
5737 $rv = &urlize($_[0]);
5739 elsif ($r eq 'SCALAR') {
5740 $rv = &urlize(${$_[0]});
5742 elsif ($r eq 'ARRAY') {
5743 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5745 elsif ($r eq 'HASH') {
5746 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5747 &urlize(&serialise_variable($_[0]->{$_})) }
5750 elsif ($r eq 'REF') {
5751 $rv = &serialise_variable(${$_[0]});
5753 elsif ($r eq 'CODE') {
5758 # An object - treat as a hash
5759 $r = "OBJECT ".&urlize($r);
5760 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5761 &urlize(&serialise_variable($_[0]->{$_})) }
5764 return ($r ? $r : 'VAL').",".$rv;
5767 =head2 unserialise_variable(string)
5769 Converts a string created by serialise_variable() back into the original
5770 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5771 object, the same class is used on this system, if available.
5774 sub unserialise_variable
5776 my @v = split(/,/, $_[0]);
5778 if ($v[0] eq 'VAL') {
5779 @v = split(/,/, $_[0], -1);
5780 $rv = &un_urlize($v[1]);
5782 elsif ($v[0] eq 'SCALAR') {
5783 local $r = &un_urlize($v[1]);
5786 elsif ($v[0] eq 'ARRAY') {
5788 for(my $i=1; $i<@v; $i++) {
5789 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5792 elsif ($v[0] eq 'HASH') {
5794 for(my $i=1; $i<@v; $i+=2) {
5795 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5796 &unserialise_variable(&un_urlize($v[$i+1]));
5799 elsif ($v[0] eq 'REF') {
5800 local $r = &unserialise_variable($v[1]);
5803 elsif ($v[0] eq 'UNDEF') {
5806 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5807 # An object hash that we have to re-bless
5810 for(my $i=1; $i<@v; $i+=2) {
5811 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5812 &unserialise_variable(&un_urlize($v[$i+1]));
5820 =head2 other_groups(user)
5822 Returns a list of secondary groups a user is a member of, as a list of
5831 while(my @g = getgrent()) {
5832 my @m = split(/\s+/, $g[3]);
5833 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5835 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5839 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5841 Returns HTML for a button that pops up a data chooser window. The parameters
5844 =item dayfield - Name of the text field to place the day of the month into.
5846 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5848 =item yearfield - Name of the text field to place the year into.
5851 sub date_chooser_button
5853 return &theme_date_chooser_button(@_)
5854 if (defined(&theme_date_chooser_button));
5855 my ($w, $h) = (250, 225);
5856 if ($gconfig{'db_sizedate'}) {
5857 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5859 return "<input type=button onClick='window.dfield = form.$_[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";
5862 =head2 help_file(module, file)
5864 Returns the path to a module's help file of some name, typically under the
5865 help directory with a .html extension.
5870 my $mdir = &module_root_directory($_[0]);
5871 my $dir = "$mdir/help";
5872 foreach my $o (@lang_order_list) {
5873 my $lang = "$dir/$_[1].$current_lang.html";
5874 return $lang if (-r $lang);
5876 return "$dir/$_[1].html";
5881 Seeds the random number generator, if not already done in this script. On Linux
5882 this makes use of the current time, process ID and a read from /dev/urandom.
5883 On other systems, only the current time and process ID are used.
5888 if (!$main::done_seed_random) {
5889 if (open(RANDOM, "/dev/urandom")) {
5891 read(RANDOM, $buf, 4);
5893 srand(time() ^ $$ ^ $buf);
5898 $main::done_seed_random = 1;
5902 =head2 disk_usage_kb(directory)
5904 Returns the number of kB used by some directory and all subdirs. Implemented
5905 by calling the C<du -k> command.
5910 my $dir = &translate_filename($_[0]);
5912 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5914 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5916 return $out =~ /^([0-9]+)/ ? $1 : "???";
5919 =head2 recursive_disk_usage(directory)
5921 Returns the number of bytes taken up by all files in some directory and all
5922 sub-directories, by summing up their lengths. The disk_usage_kb is more
5923 reflective of reality, as the filesystem typically pads file sizes to 1k or
5927 sub recursive_disk_usage
5929 my $dir = &translate_filename($_[0]);
5934 my @st = stat($dir);
5940 my @files = readdir(DIR);
5942 foreach my $f (@files) {
5943 next if ($f eq "." || $f eq "..");
5944 $rv += &recursive_disk_usage("$dir/$f");
5950 =head2 help_search_link(term, [ section, ... ] )
5952 Returns HTML for a link to the man module for searching local and online
5953 docs for various search terms. The term parameter can either be a single
5954 word like 'bind', or a space-separated list of words. This function is typically
5955 used by modules that want to refer users to additional documentation in man
5956 pages or local system doc files.
5959 sub help_search_link
5961 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
5962 my $for = &urlize(shift(@_));
5963 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
5964 join("&", map { "section=$_" } @_)."&".
5965 "for=$for&exact=1&check=".&get_module_name()."'>".
5966 $text{'helpsearch'}."</a>\n";
5973 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
5975 Opens a connection to some HTTP server, maybe through a proxy, and returns
5976 a handle object. The handle can then be used to send additional headers
5977 and read back a response. If anything goes wrong, returns an error string.
5978 The parameters are :
5980 =item host - Hostname or IP address of the webserver to connect to.
5982 =item port - HTTP port number to connect to.
5984 =item ssl - Set to 1 to connect in SSL mode.
5986 =item method - HTTP method, like GET or POST.
5988 =item page - Page to request on the webserver, like /foo/index.html
5990 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
5993 sub make_http_connection
5995 my ($host, $port, $ssl, $method, $page, $headers) = @_;
5998 foreach my $h (@$headers) {
5999 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6003 if (&is_readonly_mode()) {
6004 return "HTTP connections not allowed in readonly mode";
6006 my $rv = { 'fh' => time().$$ };
6009 eval "use Net::SSLeay";
6010 $@ && return $text{'link_essl'};
6011 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6012 eval "Net::SSLeay::load_error_strings()";
6013 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6014 return "Failed to create SSL context";
6015 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6016 return "Failed to create SSL connection";
6018 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6019 !&no_proxy($host)) {
6022 &open_socket($1, $2, $rv->{'fh'}, \$error);
6025 my $fh = $rv->{'fh'};
6026 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6027 if ($gconfig{'proxy_user'}) {
6028 my $auth = &encode_base64(
6029 "$gconfig{'proxy_user'}:".
6030 "$gconfig{'proxy_pass'}");
6031 $auth =~ tr/\r\n//d;
6032 print $fh "Proxy-Authorization: Basic $auth\r\n";
6036 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6037 return "Proxy error : $3" if ($2 != 200);
6040 return "Proxy error : $line";
6045 elsif (!$gconfig{'proxy_fallback'}) {
6046 # Connection to proxy failed - give up
6053 &open_socket($host, $port, $rv->{'fh'}, \$error);
6054 return $error if ($error);
6056 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6057 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6058 return "SSL connect() failed";
6059 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6060 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6063 # Plain HTTP request
6065 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6066 !&no_proxy($host)) {
6069 &open_socket($1, $2, $rv->{'fh'}, \$error);
6073 my $fh = $rv->{'fh'};
6074 my $rtxt = $method." ".
6075 "http://$host:$port$page HTTP/1.0\r\n";
6076 if ($gconfig{'proxy_user'}) {
6077 my $auth = &encode_base64(
6078 "$gconfig{'proxy_user'}:".
6079 "$gconfig{'proxy_pass'}");
6080 $auth =~ tr/\r\n//d;
6081 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6086 elsif (!$gconfig{'proxy_fallback'}) {
6091 # Connecting directly
6093 &open_socket($host, $port, $rv->{'fh'}, \$error);
6094 return $error if ($error);
6095 my $fh = $rv->{'fh'};
6096 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6103 =head2 read_http_connection(&handle, [bytes])
6105 Reads either one line or up to the specified number of bytes from the handle,
6106 originally supplied by make_http_connection.
6109 sub read_http_connection
6113 if ($h->{'ssl_con'}) {
6116 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6117 # need to read more..
6118 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6120 $rv = $h->{'buffer'};
6121 delete($h->{'buffer'});
6124 $h->{'buffer'} .= $more;
6126 $rv = substr($h->{'buffer'}, 0, $idx+1);
6127 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6130 if (length($h->{'buffer'})) {
6131 $rv = $h->{'buffer'};
6132 delete($h->{'buffer'});
6135 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6141 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6144 my $fh = $h->{'fh'};
6148 $rv = undef if ($rv eq "");
6152 =head2 write_http_connection(&handle, [data+])
6154 Writes the given data to the given HTTP connection handle.
6157 sub write_http_connection
6160 my $fh = $h->{'fh'};
6162 if ($h->{'ssl_ctx'}) {
6163 foreach my $s (@_) {
6164 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6165 $allok = 0 if (!$ok);
6169 my $ok = (print $fh @_);
6170 $allok = 0 if (!$ok);
6175 =head2 close_http_connection(&handle)
6177 Closes a connection to an HTTP server, identified by the given handle.
6180 sub close_http_connection
6185 =head2 clean_environment
6187 Deletes any environment variables inherited from miniserv so that they
6188 won't be passed to programs started by webmin. This is useful when calling
6189 programs that check for CGI-related environment variables and modify their
6190 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6193 sub clean_environment
6195 %UNCLEAN_ENV = %ENV;
6196 foreach my $k (keys %ENV) {
6197 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6201 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6202 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6203 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6204 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6205 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6206 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6207 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6208 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD') {
6213 =head2 reset_environment
6215 Puts the environment back how it was before clean_environment was callled.
6218 sub reset_environment
6220 if (defined(%UNCLEAN_ENV)) {
6221 foreach my $k (keys %UNCLEAN_ENV) {
6222 $ENV{$k} = $UNCLEAN_ENV{$k};
6224 undef(%UNCLEAN_ENV);
6228 =head2 progress_callback
6230 Never called directly, but useful for passing to &http_download to print
6231 out progress of an HTTP request.
6234 sub progress_callback
6236 if (defined(&theme_progress_callback)) {
6237 # Call the theme override
6238 return &theme_progress_callback(@_);
6242 print $progress_callback_prefix;
6244 $progress_size = $_[1];
6245 $progress_step = int($_[1] / 10);
6246 print &text('progress_size', $progress_callback_url,
6247 $progress_size),"<br>\n";
6250 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6252 $last_progress_time = $last_progress_size = undef;
6254 elsif ($_[0] == 3) {
6256 my $sp = $progress_callback_prefix.(" " x 5);
6257 if ($progress_size) {
6258 # And we have a size to compare against
6259 my $st = int(($_[1] * 10) / $progress_size);
6260 my $time_now = time();
6261 if ($st != $progress_step ||
6262 $time_now - $last_progress_time > 60) {
6263 # Show progress every 10% or 60 seconds
6264 print $sp,&text('progress_data', $_[1], int($_[1]*100/$progress_size)),"<br>\n";
6265 $last_progress_time = $time_now;
6267 $progress_step = $st;
6270 # No total size .. so only show in 100k jumps
6271 if ($_[1] > $last_progress_size+100*1024) {
6272 print $sp,&text('progress_data2', $_[1]),"<br>\n";
6273 $last_progress_size = $_[1];
6277 elsif ($_[0] == 4) {
6278 # All done downloading
6279 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6281 elsif ($_[0] == 5) {
6282 # Got new location after redirect
6283 $progress_callback_url = $_[1];
6285 elsif ($_[0] == 6) {
6287 $progress_callback_url = $_[1];
6288 print &text('progress_incache', $progress_callback_url),"<br>\n";
6292 =head2 switch_to_remote_user
6294 Changes the user and group of the current process to that of the unix user
6295 with the same name as the current webmin login, or fails if there is none.
6296 This should be called by Usermin module scripts that only need to run with
6297 limited permissions.
6300 sub switch_to_remote_user
6302 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6304 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6305 &create_missing_homedir(\@remote_user_info);
6307 &switch_to_unix_user(\@remote_user_info);
6308 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6309 $ENV{'HOME'} = $remote_user_info[7];
6311 # Export global variables to caller
6312 if ($main::export_to_caller) {
6313 my ($callpkg) = caller();
6314 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6318 =head2 switch_to_unix_user(&user-details)
6320 Switches the current process to the UID and group ID from the given list
6321 of user details, which must be in the format returned by getpwnam.
6324 sub switch_to_unix_user
6327 if (!defined($uinfo->[0])) {
6328 # No username given, so just use given GID
6329 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6332 # Use all groups from user
6333 ($(, $)) = ( $uinfo->[3],
6334 "$uinfo->[3] ".join(" ", $uinfo->[3],
6335 &other_groups($uinfo->[0])) );
6338 POSIX::setuid($uinfo->[2]);
6340 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6341 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6345 =head2 eval_as_unix_user(username, &code)
6347 Runs some code fragment with the effective UID and GID switch to that
6348 of the given Unix user, so that file IO takes place with his permissions.
6352 sub eval_as_unix_user
6354 my ($user, $code) = @_;
6355 my @uinfo = getpwnam($user);
6356 defined(@uinfo) || &error("eval_as_unix_user called with invalid user $user");
6357 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6361 local $main::error_must_die = 1;
6368 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6371 return wantarray ? @rv : $rv[0];
6374 =head2 create_user_config_dirs
6376 Creates per-user config directories and sets $user_config_directory and
6377 $user_module_config_directory to them. Also reads per-user module configs
6378 into %userconfig. This should be called by Usermin module scripts that need
6379 to store per-user preferences or other settings.
6382 sub create_user_config_dirs
6384 return if (!$gconfig{'userconfig'});
6385 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6386 return if (!@uinfo || !$uinfo[7]);
6387 &create_missing_homedir(\@uinfo);
6388 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6389 if (!-d $user_config_directory) {
6390 mkdir($user_config_directory, 0700) ||
6391 &error("Failed to create $user_config_directory : $!");
6392 if ($< == 0 && $uinfo[2]) {
6393 chown($uinfo[2], $uinfo[3], $user_config_directory);
6396 if (&get_module_name()) {
6397 $user_module_config_directory = $user_config_directory."/".
6399 if (!-d $user_module_config_directory) {
6400 mkdir($user_module_config_directory, 0700) ||
6401 &error("Failed to create $user_module_config_directory : $!");
6402 if ($< == 0 && $uinfo[2]) {
6403 chown($uinfo[2], $uinfo[3], $user_config_directory);
6407 &read_file_cached("$module_root_directory/defaultuconfig",
6409 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6410 &read_file_cached("$user_module_config_directory/config",
6414 # Export global variables to caller
6415 if ($main::export_to_caller) {
6416 my ($callpkg) = caller();
6417 foreach my $v ('$user_config_directory',
6418 '$user_module_config_directory', '%userconfig') {
6419 my ($vt, $vn) = split('', $v, 2);
6420 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6425 =head2 create_missing_homedir(&uinfo)
6427 If auto homedir creation is enabled, create one for this user if needed.
6428 For internal use only.
6431 sub create_missing_homedir
6434 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6435 # Use has no home dir .. make one
6436 system("mkdir -p ".quotemeta($uinfo->[7]));
6437 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6438 if ($gconfig{'create_homedir_perms'} ne '') {
6439 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6444 =head2 filter_javascript(text)
6446 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6447 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6450 sub filter_javascript
6453 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6454 $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;
6455 $rv =~ s/(javascript:)/x$1/gi;
6456 $rv =~ s/(vbscript:)/x$1/gi;
6460 =head2 resolve_links(path)
6462 Given a path that may contain symbolic links, returns the real path.
6468 $path =~ s/\/+/\//g;
6469 $path =~ s/\/$// if ($path ne "/");
6470 my @p = split(/\/+/, $path);
6472 for(my $i=0; $i<@p; $i++) {
6473 my $sofar = "/".join("/", @p[0..$i]);
6474 my $lnk = readlink($sofar);
6475 if ($lnk =~ /^\//) {
6476 # Link is absolute..
6477 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6481 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6487 =head2 simplify_path(path, bogus)
6489 Given a path, maybe containing elements ".." and "." , convert it to a
6490 clean, absolute form. Returns undef if this is not possible.
6498 my @bits = split(/\/+/, $dir);
6501 foreach my $b (@bits) {
6505 elsif ($b eq "..") {
6507 if (scalar(@fixedbits) == 0) {
6508 # Cannot! Already at root!
6515 push(@fixedbits, $b);
6518 return "/".join('/', @fixedbits);
6521 =head2 same_file(file1, file2)
6523 Returns 1 if two files are actually the same
6528 return 1 if ($_[0] eq $_[1]);
6529 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6530 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6531 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6532 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6533 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6534 return 0 if (!@stat1 || !@stat2);
6535 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6538 =head2 flush_webmin_caches
6540 Clears all in-memory and on-disk caches used by Webmin.
6543 sub flush_webmin_caches
6545 undef(%main::read_file_cache);
6546 undef(%main::acl_hash_cache);
6547 undef(%main::acl_array_cache);
6548 undef(%main::has_command_cache);
6549 undef(@main::list_languages_cache);
6550 undef($main::got_list_usermods_cache);
6551 undef(@main::list_usermods_cache);
6552 undef(%main::foreign_installed_cache);
6553 unlink("$config_directory/module.infos.cache");
6554 &get_all_module_infos();
6557 =head2 list_usermods
6559 Returns a list of additional module restrictions. For internal use in
6565 if (!$main::got_list_usermods_cache) {
6566 @main::list_usermods_cache = ( );
6568 open(USERMODS, "$config_directory/usermin.mods");
6570 if (/^([^:]+):(\+|-|):(.*)/) {
6571 push(@main::list_usermods_cache,
6572 [ $1, $2, [ split(/\s+/, $3) ] ]);
6576 $main::got_list_usermods_cache = 1;
6578 return @main::list_usermods_cache;
6581 =head2 available_usermods(&allmods, &usermods)
6583 Returns a list of modules that are available to the given user, based
6584 on usermod additional/subtractions. For internal use by Usermin only.
6587 sub available_usermods
6589 return @{$_[0]} if (!@{$_[1]});
6591 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6592 my @uinfo = @remote_user_info;
6593 @uinfo = getpwnam($remote_user) if (!@uinfo);
6594 foreach my $u (@{$_[1]}) {
6596 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6599 elsif ($u->[0] =~ /^\@(.*)$/) {
6600 # Check for group membership
6601 my @ginfo = getgrnam($1);
6602 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6603 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6605 elsif ($u->[0] =~ /^\//) {
6606 # Check users and groups in file
6608 open(USERFILE, $u->[0]);
6611 if ($_ eq $remote_user) {
6614 elsif (/^\@(.*)$/) {
6615 my @ginfo = getgrnam($1);
6617 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6618 &indexof($remote_user,
6619 split(/\s+/, $ginfo[3])) >= 0));
6626 if ($u->[1] eq "+") {
6627 map { $mods{$_}++ } @{$u->[2]};
6629 elsif ($u->[1] eq "-") {
6630 map { delete($mods{$_}) } @{$u->[2]};
6634 map { $mods{$_}++ } @{$u->[2]};
6638 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6641 =head2 get_available_module_infos(nocache)
6643 Returns a list of modules available to the current user, based on
6644 operating system support, access control and usermod restrictions. Useful
6645 in themes that need to display a list of modules the user can use.
6646 Each element of the returned array is a hash reference in the same format as
6647 returned by get_module_info.
6650 sub get_available_module_infos
6653 &read_acl(\%acl, \%uacl);
6654 my $risk = $gconfig{'risk_'.$base_remote_user};
6656 foreach my $minfo (&get_all_module_infos($_[0])) {
6657 next if (!&check_os_support($minfo));
6659 # Check module risk level
6660 next if ($risk ne 'high' && $minfo->{'risk'} &&
6661 $minfo->{'risk'} !~ /$risk/);
6665 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6666 !$acl{$base_remote_user,"*"});
6668 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6672 # Check usermod restrictions
6673 my @usermods = &list_usermods();
6674 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6675 &available_usermods(\@rv, \@usermods);
6677 # Check RBAC restrictions
6679 foreach my $m (@rv) {
6680 if (&supports_rbac($m->{'dir'}) &&
6681 &use_rbac_module_acl(undef, $m->{'dir'})) {
6682 local $rbacs = &get_rbac_module_acl($remote_user,
6690 # Module or system doesn't support RBAC
6691 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6697 if (defined(&theme_foreign_available)) {
6698 foreach my $m (@rbacrv) {
6699 if (&theme_foreign_available($m->{'dir'})) {
6708 # Check licence module vetos
6710 if ($main::licence_module) {
6711 foreach my $m (@themerv) {
6712 if (&foreign_call($main::licence_module,
6713 "check_module_licence", $m->{'dir'})) {
6725 =head2 get_visible_module_infos(nocache)
6727 Like get_available_module_infos, but excludes hidden modules from the list.
6728 Each element of the returned array is a hash reference in the same format as
6729 returned by get_module_info.
6732 sub get_visible_module_infos
6735 my $pn = &get_product_name();
6736 return grep { !$_->{'hidden'} &&
6737 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6740 =head2 get_visible_modules_categories(nocache)
6742 Returns a list of Webmin module categories, each of which is a hash ref
6743 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6744 of modules in the category, in the format returned by get_module_info.
6745 Un-used modules are automatically assigned to the 'unused' category, and
6746 those with no category are put into 'others'.
6749 sub get_visible_modules_categories
6752 my @mods = &get_visible_module_infos($nocache);
6754 if (&get_product_name() eq 'webmin') {
6755 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6756 @mods = grep { $_->{'installed'} ne '0' } @mods;
6758 my %cats = &list_categories(\@mods);
6760 foreach my $c (keys %cats) {
6761 my $cat = { 'code' => $c || 'other',
6762 'desc' => $cats{$c} };
6763 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6766 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6767 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6769 # Add un-installed modules in magic category
6770 my $cat = { 'code' => 'unused',
6771 'desc' => $text{'main_unused'},
6773 'modules' => \@unmods };
6779 =head2 is_under_directory(directory, file)
6781 Returns 1 if the given file is under the specified directory, 0 if not.
6782 Symlinks are taken into account in the file to find it's 'real' location.
6785 sub is_under_directory
6787 my ($dir, $file) = @_;
6788 return 1 if ($dir eq "/");
6789 return 0 if ($file =~ /\.\./);
6790 my $ld = &resolve_links($dir);
6792 return &is_under_directory($ld, $file);
6794 my $lp = &resolve_links($file);
6796 return &is_under_directory($dir, $lp);
6798 return 0 if (length($file) < length($dir));
6799 return 1 if ($dir eq $file);
6801 return substr($file, 0, length($dir)) eq $dir;
6804 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6806 Given an absolute URL, returns the host, port, page and ssl flag components.
6807 Relative URLs can also be parsed, if the base information is provided.
6812 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6814 my $ssl = $1 eq 'https';
6815 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6821 elsif ($_[0] =~ /^\/\S*$/) {
6822 # A relative to the server URL
6823 return ($_[1], $_[2], $_[0], $_[4]);
6826 # A relative to the directory URL
6828 $page =~ s/[^\/]+$//;
6829 return ($_[1], $_[2], $page.$_[0], $_[4]);
6833 =head2 check_clicks_function
6835 Returns HTML for a JavaScript function called check_clicks that returns
6836 true when first called, but false subsequently. Useful on onClick for
6837 critical buttons. Deprecated, as this method of preventing duplicate actions
6841 sub check_clicks_function
6846 function check_clicks(form)
6853 for(i=0; i<form.length; i++)
6854 form.elements[i].disabled = true;
6863 =head2 load_entities_map
6865 Returns a hash ref containing mappings between HTML entities (like ouml) and
6866 ascii values (like 246). Mainly for internal use.
6869 sub load_entities_map
6871 if (!defined(%entities_map_cache)) {
6873 open(EMAP, "$root_directory/entities_map.txt");
6875 if (/^(\d+)\s+(\S+)/) {
6876 $entities_map_cache{$2} = $1;
6881 return \%entities_map_cache;
6884 =head2 entities_to_ascii(string)
6886 Given a string containing HTML entities like ö and 7, replace them
6887 with their ASCII equivalents.
6890 sub entities_to_ascii
6893 my $emap = &load_entities_map();
6894 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6895 $str =~ s/&#(\d+);/chr($1)/ge;
6899 =head2 get_product_name
6901 Returns either 'webmin' or 'usermin', depending on which program the current
6902 module is in. Useful for modules that can be installed into either.
6905 sub get_product_name
6907 return $gconfig{'product'} if (defined($gconfig{'product'}));
6908 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6913 Returns the character set for the current language, such as iso-8859-1.
6918 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6919 $current_lang_info->{'charset'} ?
6920 $current_lang_info->{'charset'} : $default_charset;
6924 =head2 get_display_hostname
6926 Returns the system's hostname for UI display purposes. This may be different
6927 from the actual hostname if you administrator has configured it so in the
6928 Webmin Configuration module.
6931 sub get_display_hostname
6933 if ($gconfig{'hostnamemode'} == 0) {
6934 return &get_system_hostname();
6936 elsif ($gconfig{'hostnamemode'} == 3) {
6937 return $gconfig{'hostnamedisplay'};
6940 my $h = $ENV{'HTTP_HOST'};
6942 if ($gconfig{'hostnamemode'} == 2) {
6943 $h =~ s/^(www|ftp|mail)\.//i;
6949 =head2 save_module_config([&config], [modulename])
6951 Saves the configuration for some module. The config parameter is an optional
6952 hash reference of names and values to save, which defaults to the global
6953 %config hash. The modulename parameter is the module to update the config
6954 file, which defaults to the current module.
6957 sub save_module_config
6959 my $c = $_[0] || { &get_module_variable('%config') };
6960 my $m = defined($_[1]) ? $_[1] : &get_module_name();
6961 &write_file("$config_directory/$m/config", $c);
6964 =head2 save_user_module_config([&config], [modulename])
6966 Saves the user's Usermin preferences for some module. The config parameter is
6967 an optional hash reference of names and values to save, which defaults to the
6968 global %userconfig hash. The modulename parameter is the module to update the
6969 config file, which defaults to the current module.
6972 sub save_user_module_config
6974 my $c = $_[0] || { &get_module_variable('%userconfig') };
6975 my $m = $_[1] || &get_module_name();
6976 my $ucd = $user_config_directory;
6978 my @uinfo = @remote_user_info ? @remote_user_info
6979 : getpwnam($remote_user);
6980 return if (!@uinfo || !$uinfo[7]);
6981 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
6983 &write_file("$ucd/$m/config", $c);
6986 =head2 nice_size(bytes, [min])
6988 Converts a number of bytes into a number followed by a suffix like GB, MB
6989 or kB. Rounding is to two decimal digits. The optional min parameter sets the
6990 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
6995 my ($units, $uname);
6996 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
6997 $units = 1024*1024*1024*1024;
7000 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7001 $units = 1024*1024*1024;
7004 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7008 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7016 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7018 return $sz." ".$uname;
7021 =head2 get_perl_path
7023 Returns the path to Perl currently in use, such as /usr/bin/perl.
7028 if (open(PERL, "$config_directory/perl-path")) {
7034 return $^X if (-x $^X);
7035 return &has_command("perl");
7038 =head2 get_goto_module([&mods])
7040 Returns the details of a module that the current user should be re-directed
7041 to after logging in, or undef if none. Useful for themes.
7046 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7047 if ($gconfig{'gotomodule'}) {
7048 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7049 return $goto if ($goto);
7051 if (@mods == 1 && $gconfig{'gotoone'}) {
7057 =head2 select_all_link(field, form, [text])
7059 Returns HTML for a 'Select all' link that uses Javascript to select
7060 multiple checkboxes with the same name. The parameters are :
7062 =item field - Name of the checkbox inputs.
7064 =item form - Index of the form on the page.
7066 =item text - Message for the link, defaulting to 'Select all'.
7071 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7072 my ($field, $form, $text) = @_;
7074 $text ||= $text{'ui_selall'};
7075 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7078 =head2 select_invert_link(field, form, text)
7080 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7081 selection on multiple checkboxes with the same name. The parameters are :
7083 =item field - Name of the checkbox inputs.
7085 =item form - Index of the form on the page.
7087 =item text - Message for the link, defaulting to 'Invert selection'.
7090 sub select_invert_link
7092 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7093 my ($field, $form, $text) = @_;
7095 $text ||= $text{'ui_selinv'};
7096 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7099 =head2 select_rows_link(field, form, text, &rows)
7101 Returns HTML for a link that uses Javascript to select rows with particular
7102 values for their checkboxes. The parameters are :
7104 =item field - Name of the checkbox inputs.
7106 =item form - Index of the form on the page.
7108 =item text - Message for the link, de
7110 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7113 sub select_rows_link
7115 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7116 my ($field, $form, $text, $rows) = @_;
7118 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7119 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7120 $js .= "return false;";
7121 return "<a href='#' onClick='$js'>$text</a>";
7124 =head2 check_pid_file(file)
7126 Given a pid file, returns the PID it contains if the process is running.
7131 open(PIDFILE, $_[0]) || return undef;
7132 my $pid = <PIDFILE>;
7134 $pid =~ /^\s*(\d+)/ || return undef;
7135 kill(0, $1) || return undef;
7141 Return the local os-specific library name to this module. For internal use only.
7146 my $mn = &get_module_name();
7147 my $md = &module_root_directory($mn);
7148 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7149 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7151 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7152 return "$mn-$gconfig{'os_type'}-lib.pl";
7154 elsif (-r "$md/$mn-generic-lib.pl") {
7155 return "$mn-generic-lib.pl";
7162 =head2 module_root_directory(module)
7164 Given a module name, returns its root directory. On a typical Webmin install,
7165 all modules are under the same directory - but it is theoretically possible to
7169 sub module_root_directory
7171 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7172 if (@root_directories > 1) {
7173 foreach my $r (@root_directories) {
7179 return "$root_directories[0]/$d";
7182 =head2 list_mime_types
7184 Returns a list of all known MIME types and their extensions, as a list of hash
7185 references with keys :
7187 =item type - The MIME type, like text/plain.
7189 =item exts - A list of extensions, like .doc and .avi.
7191 =item desc - A human-readable description for the MIME type.
7196 if (!@list_mime_types_cache) {
7198 open(MIME, "$root_directory/mime.types");
7202 if (s/#\s*(.*)$//g) {
7205 my ($type, @exts) = split(/\s+/);
7207 push(@list_mime_types_cache, { 'type' => $type,
7214 return @list_mime_types_cache;
7217 =head2 guess_mime_type(filename, [default])
7219 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7220 The optional default parameter sets a default type of use if none is found,
7221 which defaults to application/octet-stream.
7226 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7228 foreach my $t (&list_mime_types()) {
7229 foreach my $e (@{$t->{'exts'}}) {
7230 return $t->{'type'} if (lc($e) eq lc($ext));
7234 return @_ > 1 ? $_[1] : "application/octet-stream";
7237 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7239 Opens a file handle for writing to a temporary file, which will only be
7240 renamed over the real file when the handle is closed. This allows critical
7241 files like /etc/shadow to be updated safely, even if writing fails part way
7242 through due to lack of disk space. The parameters are :
7244 =item handle - File handle to open, as you would use in Perl's open function.
7246 =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.
7248 =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 $! with the error code.
7250 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7252 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7258 # Just getting a temp file
7259 if (!defined($main::open_tempfiles{$_[0]})) {
7260 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7261 my $dir = $1 || "/";
7262 my $tmp = "$dir/$2.webmintmp.$$";
7263 $main::open_tempfiles{$_[0]} = $tmp;
7264 push(@main::temporary_files, $tmp);
7266 return $main::open_tempfiles{$_[0]};
7270 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7271 $fh = &callers_package($fh);
7273 my %gaccess = &get_module_acl(undef, "");
7274 my $db = $gconfig{'debug_what_write'};
7275 if ($file =~ /\r|\n|\0/) {
7276 if ($noerror) { return 0; }
7277 else { &error("Filename contains invalid characters"); }
7279 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7280 # Read-only mode .. veto all writes
7281 print STDERR "vetoing write to $file\n";
7282 return open($fh, ">$null_file");
7284 elsif ($file =~ /^(>|>>|)nul$/i) {
7285 # Write to Windows null device
7286 &webmin_debug_log($1 eq ">" ? "WRITE" :
7287 $l eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7289 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7290 # Writes to /dev/null or TTYs don't need to be handled
7291 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7292 return open($fh, $file);
7294 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7295 &webmin_debug_log("WRITE", $1) if ($db);
7296 # Over-writing a file, via a temp file
7298 $file = &translate_filename($file);
7300 # Open the link target instead
7301 $file = &resolve_links($file);
7304 # Cannot open a directory!
7305 if ($noerror) { return 0; }
7306 else { &error("Cannot write to directory $file"); }
7308 my $tmp = &open_tempfile($file);
7309 my $ex = open($fh, ">$tmp");
7310 if (!$ex && $! =~ /permission/i) {
7311 # Could not open temp file .. try opening actual file
7313 $ex = open($fh, ">$file");
7314 delete($main::open_tempfiles{$file});
7317 $main::open_temphandles{$fh} = $file;
7320 if (!$ex && !$noerror) {
7321 &error(&text("efileopen", $file, $!));
7325 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7326 # Just writing direct to a file
7327 &webmin_debug_log("WRITE", $1) if ($db);
7329 $file = &translate_filename($file);
7330 my @old_attributes = &get_clear_file_attributes($file);
7331 my $ex = open($fh, ">$file");
7332 &reset_file_attributes($file, \@old_attributes);
7333 $main::open_temphandles{$fh} = $file;
7334 if (!$ex && !$noerror) {
7335 &error(&text("efileopen", $file, $!));
7340 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7341 # Appending to a file .. nothing special to do
7342 &webmin_debug_log("APPEND", $1) if ($db);
7344 $file = &translate_filename($file);
7345 my @old_attributes = &get_clear_file_attributes($file);
7346 my $ex = open($fh, ">>$file");
7347 &reset_file_attributes($file, \@old_attributes);
7348 $main::open_temphandles{$fh} = $file;
7349 if (!$ex && !$noerror) {
7350 &error(&text("efileopen", $file, $!));
7355 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7356 # Read mode .. nothing to do here
7357 &webmin_debug_log("READ", $file) if ($db);
7358 $file = &translate_filename($file);
7359 return open($fh, $file);
7361 elsif ($file eq ">" || $file eq ">>") {
7362 my ($package, $filename, $line) = caller;
7363 if ($noerror) { return 0; }
7364 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7367 my ($package, $filename, $line) = caller;
7368 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7373 =head2 close_tempfile(file|handle)
7375 Copies a temp file to the actual file, assuming that all writes were
7376 successful. The handle must have been one passed to open_tempfile.
7382 my $fh = &callers_package($_[0]);
7384 if (defined($file = $main::open_temphandles{$fh})) {
7386 close($fh) || &error(&text("efileclose", $file, $!));
7387 delete($main::open_temphandles{$fh});
7388 return &close_tempfile($file);
7390 elsif (defined($main::open_tempfiles{$_[0]})) {
7392 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7393 my @st = stat($_[0]);
7394 if (&is_selinux_enabled() && &has_command("chcon")) {
7395 # Set original security context
7396 system("chcon --reference=".quotemeta($_[0]).
7397 " ".quotemeta($main::open_tempfiles{$_[0]}).
7398 " >/dev/null 2>&1");
7400 my @old_attributes = &get_clear_file_attributes($_[0]);
7401 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7403 # Set original permissions and ownership
7404 chmod($st[2], $_[0]);
7405 chown($st[4], $st[5], $_[0]);
7407 &reset_file_attributes($_[0], \@old_attributes);
7408 delete($main::open_tempfiles{$_[0]});
7409 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7410 if ($main::open_templocks{$_[0]}) {
7411 &unlock_file($_[0]);
7412 delete($main::open_templocks{$_[0]});
7417 # Must be closing a handle not associated with a file
7423 =head2 print_tempfile(handle, text, ...)
7425 Like the normal print function, but calls &error on failure. Useful when
7426 combined with open_tempfile, to ensure that a criticial file is never
7427 only partially written.
7432 my ($fh, @args) = @_;
7433 $fh = &callers_package($fh);
7434 (print $fh @args) || &error(&text("efilewrite",
7435 $main::open_temphandles{$fh} || $fh, $!));
7438 =head2 is_selinux_enabled
7440 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7443 sub is_selinux_enabled
7445 if (!defined($main::selinux_enabled_cache)) {
7447 if ($gconfig{'os_type'} !~ /-linux$/) {
7448 # Not on linux, so no way
7449 $main::selinux_enabled_cache = 0;
7451 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7452 # Use global config file
7453 $main::selinux_enabled_cache =
7454 $seconfig{'SELINUX'} eq 'disabled' ||
7455 !$seconfig{'SELINUX'} ? 0 : 1;
7458 # Use selinuxenabled command
7459 #$selinux_enabled_cache =
7460 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7461 $main::selinux_enabled_cache = 0;
7464 return $main::selinux_enabled_cache;
7467 =head2 get_clear_file_attributes(file)
7469 Finds file attributes that may prevent writing, clears them and returns them
7470 as a list. May call error. Mainly for internal use by open_tempfile and
7474 sub get_clear_file_attributes
7478 if ($gconfig{'chattr'}) {
7479 # Get original immutable bit
7480 my $out = &backquote_command(
7481 "lsattr ".quotemeta($file)." 2>/dev/null");
7483 $out =~ s/\s\S+\n//;
7484 @old_attributes = grep { $_ ne '-' } split(//, $out);
7486 if (&indexof("i", @old_attributes) >= 0) {
7487 my $err = &backquote_logged(
7488 "chattr -i ".quotemeta($file)." 2>&1");
7490 &error("Failed to remove immutable bit on ".
7495 return @old_attributes;
7498 =head2 reset_file_attributes(file, &attributes)
7500 Put back cleared attributes on some file. May call error. Mainly for internal
7501 use by close_tempfile.
7504 sub reset_file_attributes
7506 my ($file, $old_attributes) = @_;
7507 if (&indexof("i", @$old_attributes) >= 0) {
7508 my $err = &backquote_logged(
7509 "chattr +i ".quotemeta($file)." 2>&1");
7511 &error("Failed to restore immutable bit on ".
7517 =head2 cleanup_tempnames
7519 Remove all temporary files generated using transname. Typically only called
7520 internally when a Webmin script exits.
7523 sub cleanup_tempnames
7525 foreach my $t (@main::temporary_files) {
7528 @main::temporary_files = ( );
7531 =head2 open_lock_tempfile([handle], file, [no-error])
7533 Returns a temporary file for writing to some actual file, and also locks it.
7534 Effectively the same as calling lock_file and open_tempfile on the same file,
7535 but calls the unlock for you automatically when it is closed.
7538 sub open_lock_tempfile
7540 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7541 $fh = &callers_package($fh);
7542 my $lockfile = $file;
7543 $lockfile =~ s/^[^\/]*//;
7544 if ($lockfile =~ /^\//) {
7545 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7547 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7552 $main::end_exit_status ||= $?;
7553 if ($$ == $main::initial_process_id) {
7554 # Exiting from initial process
7555 &cleanup_tempnames();
7556 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7557 $main::debug_log_start_module eq &get_module_name()) {
7558 my $len = time() - $main::debug_log_start_time;
7559 &webmin_debug_log("STOP", "runtime=$len");
7560 $main::debug_log_start_time = 0;
7562 if (!$ENV{'SCRIPT_NAME'} &&
7563 $main::initial_module_name eq &get_module_name()) {
7564 # In a command-line script - call the real exit, so that the
7565 # exit status gets properly propogated. In some cases this
7566 # was not happening.
7567 exit($main::end_exit_status);
7572 =head2 month_to_number(month)
7574 Converts a month name like feb to a number like 1.
7579 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7582 =head2 number_to_month(number)
7584 Converts a number like 1 to a month name like Feb.
7589 return ucfirst($number_to_month_map{$_[0]});
7592 =head2 get_rbac_module_acl(user, module)
7594 Returns a hash reference of RBAC overrides ACLs for some user and module.
7595 May return undef if none exist (indicating access denied), or the string *
7596 if full access is granted.
7599 sub get_rbac_module_acl
7601 my ($user, $mod) = @_;
7602 eval "use Authen::SolarisRBAC";
7603 return undef if ($@);
7606 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7607 # Automagic webmin.modulename.admin authorization exists .. allow access
7609 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7610 %rv = ( 'noconfig' => 1 );
7617 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7621 my ($auths, $acls) = split(/\s+/, $_);
7622 my @auths = split(/,/, $auths);
7624 my ($merge) = ($acls =~ s/^\+//);
7626 if ($auths eq "*") {
7627 # These ACLs apply to all RBAC users.
7628 # Only if there is some that match a specific authorization
7629 # later will they be used though.
7632 # Check each of the RBAC authorizations
7633 foreach my $a (@auths) {
7634 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7639 $foundany++ if ($gotall);
7642 # Found an RBAC authorization - return the ACLs
7643 return "*" if ($acls eq "*");
7644 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7646 # Just add to current set
7647 foreach my $a (keys %acl) {
7658 return !$foundany ? undef : defined(%rv) ? \%rv : undef;
7661 =head2 supports_rbac([module])
7663 Returns 1 if RBAC client support is available, such as on Solaris.
7668 return 0 if ($gconfig{'os_type'} ne 'solaris');
7669 eval "use Authen::SolarisRBAC";
7672 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7677 =head2 use_rbac_module_acl(user, module)
7679 Returns 1 if some user should use RBAC to get permissions for a module
7682 sub use_rbac_module_acl
7684 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7685 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7686 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7687 my %access = &get_module_acl($u, $m, 1);
7688 return $access{'rbac'} ? 1 : 0;
7691 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7693 Runs some command, possibly feeding it input and capturing output to the
7694 give files or scalar references. The parameters are :
7696 =item command - Full command to run, possibly including shell meta-characters.
7698 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7700 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7702 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7704 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7706 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7711 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7712 if (&is_readonly_mode() && !$safe) {
7713 print STDERR "Vetoing command $_[0]\n";
7717 my $cmd = &translate_command($cmd);
7719 # Use ` operator where possible
7720 if (!$stdin && ref($stdout) && !$stderr) {
7721 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7722 $$stdout = `$cmd 2>$null_file`;
7725 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7726 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7727 $$stdout = `$cmd 2>&1`;
7730 elsif (!$stdin && !$stdout && !$stderr) {
7731 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7732 return system("$cmd >$null_file 2>$null_file <$null_file");
7734 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7737 $| = 1; # needed on some systems to flush before forking
7738 pipe(EXECSTDINr, EXECSTDINw);
7739 pipe(EXECSTDOUTr, EXECSTDOUTw);
7740 pipe(EXECSTDERRr, EXECSTDERRw);
7742 if (!($pid = fork())) {
7746 open(STDIN, "<&EXECSTDINr");
7747 open(STDOUT, ">&EXECSTDOUTw");
7748 if (ref($stderr) && $stderr eq $stdout) {
7749 open(STDERR, ">&EXECSTDOUTw");
7752 open(STDERR, ">&EXECSTDERRw");
7759 my $fullcmd = "($cmd)";
7760 if ($stdin && !ref($stdin)) {
7761 $fullcmd .= " <$stdin";
7763 if ($stdout && !ref($stdout)) {
7764 $fullcmd .= " >$stdout";
7766 if ($stderr && !ref($stderr)) {
7767 if ($stderr eq $stdout) {
7768 $fullcmd .= " 2>&1";
7771 $fullcmd .= " 2>$stderr";
7774 if ($gconfig{'os_type'} eq 'windows') {
7778 exec("/bin/sh", "-c", $fullcmd);
7780 print "Exec failed : $!\n";
7787 # Feed input and capture output
7789 if ($stdin && ref($stdin)) {
7790 print EXECSTDINw $$stdin;
7793 if ($stdout && ref($stdout)) {
7795 while(<EXECSTDOUTr>) {
7800 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7802 while(<EXECSTDERRr>) {
7813 =head2 open_readfile(handle, file)
7815 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7816 exactly the same as Perl's open function.
7821 my ($fh, $file) = @_;
7822 $fh = &callers_package($fh);
7823 my $realfile = &translate_filename($file);
7824 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7825 return open($fh, "<".$realfile);
7828 =head2 open_execute_command(handle, command, output?, safe?)
7830 Runs some command, with the specified file handle set to either write to it if
7831 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7832 indicates if the command modifies the state of the system or not.
7835 sub open_execute_command
7837 my ($fh, $cmd, $mode, $safe) = @_;
7838 $fh = &callers_package($fh);
7839 my $realcmd = &translate_command($cmd);
7840 if (&is_readonly_mode() && !$safe) {
7841 # Don't actually run it
7842 print STDERR "vetoing command $cmd\n";
7845 return open($fh, ">$null_file");
7848 return open($fh, $null_file);
7852 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7853 if ($gconfig{'debug_what_cmd'});
7855 return open($fh, "| $cmd");
7857 elsif ($mode == 1) {
7858 return open($fh, "$cmd 2>$null_file |");
7860 elsif ($mode == 2) {
7861 return open($fh, "$cmd 2>&1 |");
7865 =head2 translate_filename(filename)
7867 Applies all relevant registered translation functions to a filename. Mostly
7868 for internal use, and typically does nothing.
7871 sub translate_filename
7873 my ($realfile) = @_;
7874 my @funcs = grep { $_->[0] eq &get_module_name() ||
7875 !defined($_->[0]) } @main::filename_callbacks;
7876 foreach my $f (@funcs) {
7878 $realfile = &$func($realfile, @{$f->[2]});
7883 =head2 translate_command(filename)
7885 Applies all relevant registered translation functions to a command. Mostly
7886 for internal use, and typically does nothing.
7889 sub translate_command
7892 my @funcs = grep { $_->[0] eq &get_module_name() ||
7893 !defined($_->[0]) } @main::command_callbacks;
7894 foreach my $f (@funcs) {
7896 $realcmd = &$func($realcmd, @{$f->[2]});
7901 =head2 register_filename_callback(module|undef, &function, &args)
7903 Registers some function to be called when the specified module (or all
7904 modules) tries to open a file for reading and writing. The function must
7905 return the actual file to open. This allows you to override which files
7906 other code actually operates on, via the translate_filename function.
7909 sub register_filename_callback
7911 my ($mod, $func, $args) = @_;
7912 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7915 =head2 register_command_callback(module|undef, &function, &args)
7917 Registers some function to be called when the specified module (or all
7918 modules) tries to execute a command. The function must return the actual
7919 command to run. This allows you to override which commands other other code
7920 actually runs, via the translate_command function.
7923 sub register_command_callback
7925 my ($mod, $func, $args) = @_;
7926 push(@main::command_callbacks, [ $mod, $func, $args ]);
7929 =head2 capture_function_output(&function, arg, ...)
7931 Captures output that some function prints to STDOUT, and returns it. Useful
7932 for functions outside your control that print data when you really want to
7933 manipulate it before output.
7936 sub capture_function_output
7938 my ($func, @args) = @_;
7939 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
7940 my $old = select(SOCKET1);
7941 my @rv = &$func(@args);
7950 return wantarray ? ($out, \@rv) : $out;
7953 =head2 capture_function_output_tempfile(&function, arg, ...)
7955 Behaves the same as capture_function_output, but uses a temporary file
7956 to avoid buffer full problems.
7959 sub capture_function_output_tempfile
7961 my ($func, @args) = @_;
7962 my $temp = &transname();
7963 open(BUFFER, ">$temp");
7964 my $old = select(BUFFER);
7965 my @rv = &$func(@args);
7968 my $out = &read_file_contents($temp);
7969 &unlink_file($temp);
7970 return wantarray ? ($out, \@rv) : $out;
7973 =head2 modules_chooser_button(field, multiple, [form])
7975 Returns HTML for a button for selecting one or many Webmin modules.
7976 field - Name of the HTML field to place the module names into.
7977 multiple - Set to 1 if multiple modules can be selected.
7978 form - Index of the form on the page.
7981 sub modules_chooser_button
7983 return &theme_modules_chooser_button(@_)
7984 if (defined(&theme_modules_chooser_button));
7985 my $form = defined($_[2]) ? $_[2] : 0;
7986 my $w = $_[1] ? 700 : 500;
7988 if ($_[1] && $gconfig{'db_sizemodules'}) {
7989 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
7991 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
7992 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
7994 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";
7997 =head2 substitute_template(text, &hash)
7999 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8000 the text replaces it with the value of the hash key foo. Also supports blocks
8001 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8002 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8005 sub substitute_template
8007 # Add some extra fixed parameters to the hash
8008 my %hash = %{$_[1]};
8009 $hash{'hostname'} = &get_system_hostname();
8010 $hash{'webmin_config'} = $config_directory;
8011 $hash{'webmin_etc'} = $config_directory;
8012 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8013 $hash{'webmin_var'} = $var_directory;
8015 # Add time-based parameters, for use in DNS
8016 $hash{'current_time'} = time();
8017 my @tm = localtime($hash{'current_time'});
8018 $hash{'current_year'} = $tm[5]+1900;
8019 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8020 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8021 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8022 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8023 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8025 # Actually do the substition
8027 foreach my $s (keys %hash) {
8028 next if ($s eq ''); # Prevent just $ from being subbed
8031 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8032 $rv =~ s/\$\Q$us\E/$sv/g;
8034 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8035 # and ${IF}..${ENDIF} with value
8036 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/\2/g;
8037 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/\2/g;
8039 # Replace $IF..$ELSE..$ENDIF block with first value,
8040 # and $IF..$ENDIF with value
8041 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/\2/g;
8042 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/\2/g;
8044 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8045 # matching, nothing if not
8046 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/\2/g;
8047 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8049 # Replace $IFEQ..$ENDIFEQ block with first value if
8050 # matching, nothing if not
8051 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/\2/g;
8052 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8055 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8056 # and ${IF}..${ENDIF} with nothing
8057 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/\4/g;
8058 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8060 # Replace $IF..$ELSE..$ENDIF block with second value,
8061 # and $IF..$ENDIF with nothing
8062 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/\4/g;
8063 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8065 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8066 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8067 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8071 # Now assume any $IF blocks whose variables are not present in the hash
8072 # evaluate to false.
8073 # $IF...$ELSE x $ENDIF => x
8074 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8075 # $IF...x...$ENDIF => (nothing)
8076 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8077 # ${var} => (nothing)
8078 $rv =~ s/\$\{[A-Z]+\}//g;
8083 =head2 running_in_zone
8085 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8086 disable module and features that are not appropriate, like those that modify
8087 mounted filesystems.
8092 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8093 $gconfig{'os_version'} < 10);
8094 my $zn = `zonename 2>$null_file`;
8096 return $zn && $zn ne "global";
8099 =head2 running_in_vserver
8101 Returns 1 if the current Webmin instance is running in a Linux VServer.
8102 Used to disable modules and features that are not appropriate.
8105 sub running_in_vserver
8107 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8110 open(MTAB, "/etc/mtab");
8112 my ($dev, $mp) = split(/\s+/, $_);
8113 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8122 =head2 running_in_xen
8124 Returns 1 if Webmin is running inside a Xen instance, by looking
8125 at /proc/xen/capabilities.
8130 return 0 if (!-r "/proc/xen/capabilities");
8131 my $cap = &read_file_contents("/proc/xen/capabilities");
8132 return $cap =~ /control_d/ ? 0 : 1;
8135 =head2 list_categories(&modules, [include-empty])
8137 Returns a hash mapping category codes to names, including any custom-defined
8138 categories. The modules parameter must be an array ref of module hash objects,
8139 as returned by get_all_module_infos.
8144 my ($mods, $empty) = @_;
8145 my (%cats, %catnames);
8146 &read_file("$config_directory/webmin.catnames", \%catnames);
8147 foreach my $o (@lang_order_list) {
8148 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8153 foreach my $m (@$mods) {
8154 my $c = $m->{'category'};
8155 next if ($cats{$c});
8156 if (defined($catnames{$c})) {
8157 $cats{$c} = $catnames{$c};
8159 elsif ($text{"category_$c"}) {
8160 $cats{$c} = $text{"category_$c"};
8163 # try to get category name from module ..
8164 my %mtext = &load_language($m->{'dir'});
8165 if ($mtext{"category_$c"}) {
8166 $cats{$c} = $mtext{"category_$c"};
8169 $c = $m->{'category'} = "";
8170 $cats{$c} = $text{"category_$c"};
8177 =head2 is_readonly_mode
8179 Returns 1 if the current user is in read-only mode, and thus all writes
8180 to files and command execution should fail.
8183 sub is_readonly_mode
8185 if (!defined($main::readonly_mode_cache)) {
8186 my %gaccess = &get_module_acl(undef, "");
8187 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8189 return $main::readonly_mode_cache;
8192 =head2 command_as_user(user, with-env?, command, ...)
8194 Returns a command to execute some command as the given user, using the
8195 su statement. If on Linux, the /bin/sh shell is forced in case the user
8196 does not have a valid shell. If with-env is set to 1, the -s flag is added
8197 to the su command to read the user's .profile or .bashrc file.
8202 my ($user, $env, @args) = @_;
8203 my @uinfo = getpwnam($user);
8204 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8205 # User shell doesn't appear to be valid
8206 if ($gconfig{'os_type'} =~ /-linux$/) {
8207 # Use -s /bin/sh to force it
8208 $shellarg = " -s /bin/sh";
8210 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8211 $gconfig{'os_type'} eq 'solaris' &&
8212 $gconfig{'os_version'} >= 11 ||
8213 $gconfig{'os_type'} eq 'macos') {
8214 # Use -m and force /bin/sh
8215 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8219 my $rv = "su".($env ? " -" : "").$shellarg.
8220 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8224 =head2 list_osdn_mirrors(project, file)
8226 Given a OSDN project and filename, returns a list of mirror URLs from
8227 which it can be downloaded. Mainly for internal use by the http_download
8231 sub list_osdn_mirrors
8233 my ($project, $file) = @_;
8235 # Convert the sourceforge project name to a group ID
8236 my ($idpage, $iderror);
8237 &http_download($osdn_download_host, $osdn_download_port,
8238 "/$project/", \$idpage, \$iderror,
8239 undef, 0, undef, undef, 0, 0, 1);
8241 if ($idpage =~ /showfiles.php\?group_id=(\d+)/) {
8245 # Query the mirror picker page
8246 my ($page, $error, @rv);
8248 &http_download($osdn_download_host, $osdn_download_port,
8249 "/project/mirror_picker.php?group_id=".&urlize($group_id).
8250 "&filename=".&urlize($file),
8251 \$page, \$error, undef, 0, undef, undef, 0, 0, 1,
8253 while($page =~ /<input[^>]*name="use_mirror"\s+value="(\S+)"[^>]*>([^,]+),\s*([^<]*)<([\000-\377]*)/i) {
8254 # Got a country and city
8255 push(@rv, { 'country' => $3,
8258 'url' => "http://$1.dl.sourceforge.net/sourceforge/$project/$file" });
8264 # None found! Try some known mirrors
8265 foreach my $m ("superb-east", "superb-west", "osdn", "downloads") {
8266 my $url = $m eq "downloads" ?
8267 "http://downloads.sourceforge.net/$project/$file" :
8268 "http://$m.dl.sourceforge.net/sourceforge/$project/$file";
8269 $main::download_timed_out = undef;
8270 local $SIG{ALRM} = \&download_timeout;
8272 my ($host, $port, $page, $ssl) = &parse_http_url($url);
8273 my $h = &make_http_connection(
8274 $host, $port, $ssl, "HEAD", $page);
8276 next if (!ref($h) || $main::download_timed_out);
8278 # Make a HEAD request
8279 &write_http_connection($h, "Host: $host\r\n");
8280 &write_http_connection($h, "User-agent: Webmin\r\n");
8281 &write_http_connection($h, "\r\n");
8282 $line = &read_http_connection($h);
8283 $line =~ s/\r|\n//g;
8284 &close_http_connection($h);
8285 if ($line =~ /^HTTP\/1\..\s+(200)\s+/) {
8286 push(@rv, { 'mirror' => $m,
8287 'default' => $m eq 'osdn',
8296 =head2 convert_osdn_url(url)
8298 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8299 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8300 to a real URL on the best mirror.
8303 sub convert_osdn_url
8306 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8307 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8309 my ($project, $file) = ($1, $2);
8310 my @mirrors = &list_osdn_mirrors($project, $file);
8311 my $pref = $gconfig{'osdn_mirror'};
8314 ($site) = grep { $_->{'mirror'} eq $pref } @mirrors;
8317 # Fall back to automatic mirror selection via Sourceforge
8319 $site = { 'url' => "http://prdownloads.sourceforge.net/sourceforge/$project/$file",
8322 return wantarray ? ( $site->{'url'}, $site->{'default'} )
8326 # Some other source .. don't change
8327 return wantarray ? ( $url, 2 ) : $url;
8331 =head2 get_current_dir
8333 Returns the directory the current process is running in.
8339 if ($gconfig{'os_type'} eq 'windows') {
8352 =head2 supports_users
8354 Returns 1 if the current OS supports Unix user concepts and functions like
8355 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8361 return $gconfig{'os_type'} ne 'windows';
8364 =head2 supports_symlinks
8366 Returns 1 if the current OS supports symbolic and hard links. This will not
8367 be the case on Windows.
8370 sub supports_symlinks
8372 return $gconfig{'os_type'} ne 'windows';
8375 =head2 quote_path(path)
8377 Returns a path with safe quoting for the current operating system.
8383 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8384 # Windows only supports "" style quoting
8388 return quotemeta($path);
8392 =head2 get_windows_root
8394 Returns the base windows system directory, like c:/windows.
8397 sub get_windows_root
8399 if ($ENV{'SystemRoot'}) {
8400 my $rv = $ENV{'SystemRoot'};
8405 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8409 =head2 read_file_contents(file)
8411 Given a filename, returns its complete contents as a string. Effectively
8412 the same as the Perl construct `cat file`.
8415 sub read_file_contents
8417 &open_readfile(FILE, $_[0]) || return undef;
8424 =head2 unix_crypt(password, salt)
8426 Performs Unix encryption on a password, using the built-in crypt function or
8427 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8428 must be either an already-hashed password, or a two-character alpha-numeric
8434 my ($pass, $salt) = @_;
8435 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8436 my $rv = eval "crypt(\$pass, \$salt)";
8438 return $rv if ($rv && !$@);
8439 eval "use Crypt::UnixCrypt";
8441 return Crypt::UnixCrypt::crypt($pass, $salt);
8444 &error("Failed to encrypt password : $err");
8448 =head2 split_quoted_string(string)
8450 Given a string like I<foo "bar baz" quux>, returns the array :
8454 sub split_quoted_string
8458 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8459 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8460 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8467 =head2 write_to_http_cache(url, file|&data)
8469 Updates the Webmin cache with the contents of the given file, possibly also
8470 clearing out old data. Mainly for internal use by http_download.
8473 sub write_to_http_cache
8475 my ($url, $file) = @_;
8476 return 0 if (!$gconfig{'cache_size'});
8478 # Don't cache downloads that look dynamic
8479 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8483 # Check if the current module should do caching
8484 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8485 # Caching all except some modules
8486 my @mods = split(/\s+/, $1);
8487 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8489 elsif ($gconfig{'cache_mods'}) {
8490 # Only caching some modules
8491 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8492 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8498 $size = length($$file);
8501 my @st = stat($file);
8505 if ($size > $gconfig{'cache_size'}) {
8506 # Bigger than the whole cache - so don't save it
8511 $cfile = "$main::http_cache_directory/$cfile";
8513 # See how much we have cached currently, clearing old files
8515 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8516 opendir(CACHEDIR, $main::http_cache_directory);
8517 foreach my $f (readdir(CACHEDIR)) {
8518 next if ($f eq "." || $f eq "..");
8519 my $path = "$main::http_cache_directory/$f";
8520 my @st = stat($path);
8521 if ($gconfig{'cache_days'} &&
8522 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8523 # This file is too old .. trash it
8528 push(@cached, [ $path, $st[7], $st[9] ]);
8532 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8533 while($total+$size > $gconfig{'cache_size'} && @cached) {
8534 # Cache is too big .. delete some files until the new one will fit
8535 unlink($cached[0]->[0]);
8536 $total -= $cached[0]->[1];
8540 # Finally, write out the new file
8542 &open_tempfile(CACHEFILE, ">$cfile");
8543 &print_tempfile(CACHEFILE, $$file);
8544 &close_tempfile(CACHEFILE);
8547 my ($ok, $err) = ©_source_dest($file, $cfile);
8553 =head2 check_in_http_cache(url)
8555 If some URL is in the cache and valid, return the filename for it. Mainly
8556 for internal use by http_download.
8559 sub check_in_http_cache
8562 return undef if (!$gconfig{'cache_size'});
8564 # Check if the current module should do caching
8565 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8566 # Caching all except some modules
8567 my @mods = split(/\s+/, $1);
8568 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8570 elsif ($gconfig{'cache_mods'}) {
8571 # Only caching some modules
8572 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8573 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8578 $cfile = "$main::http_cache_directory/$cfile";
8579 my @st = stat($cfile);
8580 return undef if (!@st || !$st[7]);
8581 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8586 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8591 =head2 supports_javascript
8593 Returns 1 if the current browser is assumed to support javascript.
8596 sub supports_javascript
8598 if (defined(&theme_supports_javascript)) {
8599 return &theme_supports_javascript();
8601 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8604 =head2 get_module_name
8606 Returns the name of the Webmin module that called this function. For internal
8607 use only by other API functions.
8612 return &get_module_variable('$module_name');
8615 =head2 get_module_variable(name, [ref])
8617 Returns the value of some variable which is set in the caller's context, if
8618 using the new WebminCore package. For internal use only.
8621 sub get_module_variable
8623 my ($v, $wantref) = @_;
8624 my $slash = $wantref ? "\\" : "";
8625 my $thispkg = &web_libs_package();
8626 if ($thispkg eq 'WebminCore') {
8627 my ($vt, $vn) = split('', $v, 2);
8629 for(my $i=0; ($callpkg) = caller($i); $i++) {
8630 last if ($callpkg ne $thispkg);
8632 return eval "${slash}${vt}${callpkg}::${vn}";
8634 return eval "${slash}${v}";
8637 =head2 clear_time_locale()
8639 Temporarily force the locale to C, until reset_time_locale is called. This is
8640 useful if your code is going to call C<strftime> from the POSIX package, and
8641 you want to ensure that the output is in a consistent format.
8644 sub clear_time_locale
8646 if ($main::clear_time_locale_count == 0) {
8649 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8650 POSIX::setlocale(POSIX::LC_TIME, "C");
8653 $main::clear_time_locale_count++;
8656 =head2 reset_time_locale()
8658 Revert the locale to whatever it was before clear_time_locale was called
8661 sub reset_time_locale
8663 if ($main::clear_time_locale_count == 1) {
8665 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8666 $main::clear_time_locale_old = undef;
8669 $main::clear_time_locale_count--;
8672 =head2 callers_package(filehandle)
8674 Convert a non-module filehandle like FOO to one qualified with the
8675 caller's caller's package, like fsdump::FOO. For internal use only.
8681 my $callpkg = (caller(1))[0];
8682 my $thispkg = &web_libs_package();
8683 if (!ref($fh) && $fh !~ /::/ &&
8684 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8685 $fh = $callpkg."::".$fh;
8690 =head2 web_libs_package()
8692 Returns the package this code is in. We can't always trust __PACKAGE__. For
8696 sub web_libs_package
8698 if ($called_from_webmin_core) {
8699 return "WebminCore";
8704 $done_web_lib_funcs = 1;