1 =head1 web-lib-funcs.pl
3 Common functions for Webmin CGI scripts. This file gets in-directly included
4 by all scripts that use web-lib.pl.
9 ui_print_header(undef, 'My Module', '');
10 print 'This is Webmin version ',get_webmin_version(),'<p>\n';
19 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
20 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
21 %done_foreign_require $webmin_feedback_address
22 $user_skill_level $pragma_no_cache $foreign_args);
24 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
26 Fill the given hash reference with name=value pairs from a file. The required
29 =item file - The file to head, which must be text with each line like name=value
31 =item hash - The hash reference to add values read from the file to.
33 =item order - If given, an array reference to add names to in the order they were read
35 =item lowercase - If set to 1, names are converted to lower case
37 =item split-char - If set, names and values are split on this character instead of =
43 my $split = defined($_[4]) ? $_[4] : "=";
44 my $realfile = &translate_filename($_[0]);
45 &open_readfile(ARFILE, $_[0]) || return 0;
48 my $hash = index($_, "#");
49 my $eq = index($_, $split);
50 if ($hash != 0 && $eq >= 0) {
51 my $n = substr($_, 0, $eq);
52 my $v = substr($_, $eq+1);
54 $_[1]->{$_[3] ? lc($n) : $n} = $v;
55 push(@{$_[2]}, $n) if ($_[2]);
59 $main::read_file_missing{$realfile} = 0; # It exists now
60 if (defined($main::read_file_cache{$realfile})) {
61 %{$main::read_file_cache{$realfile}} = %{$_[1]};
66 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
68 Like read_file, but reads from an in-memory cache if the file has already been
69 read in this Webmin script. Recommended, as it behaves exactly the same as
70 read_file, but can be much faster.
75 my $realfile = &translate_filename($_[0]);
76 if (defined($main::read_file_cache{$realfile})) {
78 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
81 elsif ($main::read_file_missing{$realfile}) {
82 # Doesn't exist, so don't re-try read
86 # Actually read the file
88 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
89 %{$main::read_file_cache{$realfile}} = %d;
90 %{$_[1]} = ( %{$_[1]}, %d );
94 # Flag as non-existant
95 $main::read_file_missing{$realfile} = 1;
101 =head2 write_file(file, &hash, [join-char])
103 Write out the contents of a hash as name=value lines. The parameters are :
105 =item file - Full path to write to
107 =item hash - A hash reference containing names and values to output
109 =item join-char - If given, names and values are separated by this instead of =
115 my $join = defined($_[2]) ? $_[2] : "=";
116 my $realfile = &translate_filename($_[0]);
117 &read_file($_[0], \%old, \@order);
118 &open_tempfile(ARFILE, ">$_[0]");
119 foreach $k (@order) {
120 if (exists($_[1]->{$k})) {
121 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
122 &error(&text("efilewrite", $realfile, $!));
125 foreach $k (keys %{$_[1]}) {
126 if (!exists($old{$k})) {
127 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
128 &error(&text("efilewrite", $realfile, $!));
131 &close_tempfile(ARFILE);
132 if (defined($main::read_file_cache{$realfile})) {
133 %{$main::read_file_cache{$realfile}} = %{$_[1]};
135 if (defined($main::read_file_missing{$realfile})) {
136 $main::read_file_missing{$realfile} = 0;
140 =head2 html_escape(string)
142 Converts &, < and > codes in text to HTML entities, and returns the new string.
143 This should be used when including data read from other sources in HTML pages.
152 $tmp =~ s/\"/"/g;
153 $tmp =~ s/\'/'/g;
158 =head2 quote_escape(string, [only-quote])
160 Converts ' and " characters in a string into HTML entities, and returns it.
161 Useful for outputing HTML tag values.
166 my ($tmp, $only) = @_;
167 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
168 # convert &, unless it is part of &#nnn; or &foo;
169 $tmp =~ s/&([^#])/&$1/g;
171 $tmp =~ s/&$/&/g;
172 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
173 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
177 =head2 tempname([filename])
179 Returns a mostly random temporary file name, typically under the /tmp/.webmin
180 directory. If filename is given, this will be the base name used. Otherwise
181 a unique name is selected randomly.
186 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
187 $gconfig{'tempdir_'.&get_module_name()} :
188 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
189 $ENV{'TEMP'} ? $ENV{'TEMP'} :
190 $ENV{'TMP'} ? $ENV{'TMP'} :
191 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
192 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
193 "$remote_user_info[7]/.tmp" :
194 @remote_user_info ? $tmp_base."-".$remote_user :
195 $< != 0 ? $tmp_base."-".getpwuid($<) :
197 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
198 # On Windows system, just create temp dir if missing
200 mkdir($tmp_dir, 0755) ||
201 &error("Failed to create temp directory $tmp_dir : $!");
205 # On Unix systems, need to make sure temp dir is valid
207 while($tries++ < 10) {
208 my @st = lstat($tmp_dir);
209 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
211 unlink($tmp_dir) || rmdir($tmp_dir) ||
212 system("/bin/rm -rf ".quotemeta($tmp_dir));
214 mkdir($tmp_dir, 0755) || next;
215 chown($<, $(, $tmp_dir);
216 chmod(0755, $tmp_dir);
219 my @st = lstat($tmp_dir);
220 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
224 if (defined($_[0]) && $_[0] !~ /\.\./) {
225 $rv = "$tmp_dir/$_[0]";
228 $main::tempfilecount++;
230 $rv = $tmp_dir."/".int(rand(1000000))."_".
231 $main::tempfilecount."_".$scriptname;
236 =head2 transname([filename])
238 Behaves exactly like tempname, but records the temp file for deletion when the
239 current Webmin script process exits.
244 my $rv = &tempname(@_);
245 push(@main::temporary_files, $rv);
249 =head2 trunc(string, maxlen)
251 Truncates a string to the shortest whole word less than or equal to the
252 given width. Useful for word wrapping.
257 if (length($_[0]) <= $_[1]) {
260 my $str = substr($_[0],0,$_[1]);
269 =head2 indexof(string, value, ...)
271 Returns the index of some value in an array of values, or -1 if it was not
277 for(my $i=1; $i <= $#_; $i++) {
278 if ($_[$i] eq $_[0]) { return $i - 1; }
283 =head2 indexoflc(string, value, ...)
285 Like indexof, but does a case-insensitive match
290 my $str = lc(shift(@_));
291 my @arr = map { lc($_) } @_;
292 return &indexof($str, @arr);
295 =head2 sysprint(handle, [string]+)
297 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
298 as a replacement for print when writing to pipes or sockets.
303 my $fh = &callers_package($_[0]);
304 my $str = join('', @_[1..$#_]);
305 syswrite $fh, $str, length($str);
308 =head2 check_ipaddress(ip)
310 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
315 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
316 $1 >= 0 && $1 <= 255 &&
317 $2 >= 0 && $2 <= 255 &&
318 $3 >= 0 && $3 <= 255 &&
319 $4 >= 0 && $4 <= 255;
322 =head2 check_ip6address(ip)
324 Check if some IPv6 address is properly formatted, and returns 1 if so.
329 my @blocks = split(/:/, $_[0]);
330 return 0 if (@blocks == 0 || @blocks > 8);
332 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
333 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
334 # value is in [0;128].
336 my $where = index($blocks[$ib],"/");
339 my $b = substr($blocks[$ib],0,$where);
340 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
344 # The netmask must take its value in [0;128]
345 return 0 if ($m <0 || $m >128);
347 # Check the different blocks of the address : 16 bits block in hexa notation.
348 # Possibility of 1 empty block or 2 if the address begins with "::".
351 foreach $b (@blocks) {
352 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
353 $empty++ if ($b eq "");
355 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
361 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
363 Prints HTML for an icon image. The parameters are :
365 =item image - URL for the image, like images/foo.gif
367 =item title - Text to appear under the icon
369 =item link - Optional destination for the icon's link
371 =item href - Other HTML attributes to be added to the <a href> for the link
373 =item width - Optional width of the icon
375 =item height - Optional height of the icon
377 =item before-title - HTML to appear before the title link, but which is not actually in the link
379 =item after-title - HTML to appear after the title link, but which is not actually in the link
384 &load_theme_library();
385 if (defined(&theme_generate_icon)) {
386 &theme_generate_icon(@_);
389 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
390 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
391 if ($tconfig{'noicons'}) {
393 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
396 print "$_[6]$_[1]$_[7]\n";
400 print "<table border><tr><td width=48 height=48>\n",
401 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
402 "$w $h></a></td></tr></table>\n";
403 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
406 print "<table border><tr><td width=48 height=48>\n",
407 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
408 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
414 Converts a string to a form ok for putting in a URL, using % escaping.
420 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
424 =head2 un_urlize(string)
426 Converts a URL-encoded string to it's original contents - the reverse of the
434 $rv =~ s/%(..)/pack("c",hex($1))/ge;
438 =head2 include(filename)
440 Read and output the contents of the given file.
446 open(INCLUDE, &translate_filename($_[0])) || return 0;
454 =head2 copydata(in-handle, out-handle)
456 Read from one file handle and write to another, until there is no more to read.
462 $in = &callers_package($in);
463 $out = &callers_package($out);
465 while(read($in, $buf, 1024) > 0) {
466 (print $out $buf) || return 0;
471 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
473 Read data submitted via a POST request using the multipart/form-data coding,
474 and store it in the global %in hash. The optional parameters are :
476 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
478 =item cbfunc - A function reference to call after reading each block of data.
480 =item cbargs - Additional parameters to the callback function.
485 my ($max, $cbfunc, $cbargs) = @_;
486 my ($boundary, $line, $foo, $name, $got, $file);
487 my $err = &text('readparse_max', $max);
488 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
489 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
492 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
494 <STDIN>; # skip first boundary
497 # Read section headers
501 $got += length($line);
502 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
503 if ($max && $got > $max) {
508 if ($line =~ /^(\S+):\s*(.*)$/) {
509 $header{$lastheader = lc($1)} = $2;
511 elsif ($line =~ /^\s+(.*)$/) {
512 $header{$lastheader} .= $line;
516 # Parse out filename and type
517 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
519 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
524 $foo = $name . "_$1";
531 &error($text{'readparse_cdheader'});
533 if ($header{'content-type'} =~ /^([^\s;]+)/) {
534 $foo = $name . "_content_type";
537 $file = $in{$name."_filename"};
540 $in{$name} .= "\0" if (defined($in{$name}));
543 $got += length($line);
544 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
546 if ($max && $got > $max) {
547 #print STDERR "over limit of $max\n";
552 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
557 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
558 if (index($line, $boundary) != -1) { last; }
561 chop($in{$name}); chop($in{$name});
562 if (index($line,"$boundary--") != -1) { last; }
564 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
567 =head2 ReadParse([&hash], [method], [noplus])
569 Fills the given hash reference with CGI parameters, or uses the global hash
570 %in if none is given. Also sets the global variables $in and @in. The other
573 =item method - For use of this HTTP method, such as GET
575 =item noplus - Don't convert + in parameters to spaces.
580 my $a = $_[0] || \%in;
582 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
584 if ($meth eq 'POST') {
585 my $clen = $ENV{'CONTENT_LENGTH'};
586 &read_fully(STDIN, \$in, $clen) == $clen ||
587 &error("Failed to read POST input : $!");
589 if ($ENV{'QUERY_STRING'}) {
590 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
591 else { $in = $ENV{'QUERY_STRING'}; }
593 @in = split(/\&/, $in);
594 foreach my $i (@in) {
595 my ($k, $v) = split(/=/, $i, 2);
600 $k =~ s/%(..)/pack("c",hex($1))/ge;
601 $v =~ s/%(..)/pack("c",hex($1))/ge;
602 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
606 =head2 read_fully(fh, &buffer, length)
608 Read data from some file handle up to the given length, even in the face
609 of partial reads. Reads the number of bytes read. Stores received data in the
610 string pointed to be the buffer reference.
615 my ($fh, $buf, $len) = @_;
616 $fh = &callers_package($fh);
619 my $r = read(STDIN, $$buf, $len-$got, $got);
626 =head2 read_parse_mime_callback(size, totalsize, upload-id)
628 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
629 the file on every 1% change though. For internal use by the upload progress
633 sub read_parse_mime_callback
635 my ($size, $totalsize, $filename, $id) = @_;
636 return if ($gconfig{'no_upload_tracker'});
639 # Create the upload tracking directory - if running as non-root, this has to
640 # be under the user's home
643 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
644 $vardir = "$uinfo[7]/.tmp";
647 $vardir = $ENV{'WEBMIN_VAR'};
650 &make_dir($vardir, 0755);
653 # Remove any upload.* files more than 1 hour old
654 if (!$main::read_parse_mime_callback_flushed) {
656 opendir(UPDIR, $vardir);
657 foreach my $f (readdir(UPDIR)) {
658 next if ($f !~ /^upload\./);
659 my @st = stat("$vardir/$f");
660 if ($st[9] < $now-3600) {
661 unlink("$vardir/$f");
665 $main::read_parse_mime_callback_flushed++;
668 # Only update file once per percent
669 my $upfile = "$vardir/upload.$id";
670 if ($totalsize && $size >= 0) {
671 my $pc = int(100 * $size / $totalsize);
672 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
675 $main::read_parse_mime_callback_pc{$upfile} = $pc;
679 &open_tempfile(UPFILE, ">$upfile");
680 print UPFILE $size,"\n";
681 print UPFILE $totalsize,"\n";
682 print UPFILE $filename,"\n";
683 &close_tempfile(UPFILE);
686 =head2 read_parse_mime_javascript(upload-id, [&fields])
688 Returns an onSubmit= Javascript statement to popup a window for tracking
689 an upload with the given ID. For internal use by the upload progress tracker.
692 sub read_parse_mime_javascript
694 my ($id, $fields) = @_;
695 return "" if ($gconfig{'no_upload_tracker'});
696 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
698 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
699 return "onSubmit='if ($if) { $opener }'";
702 return "onSubmit='$opener'";
706 =head2 PrintHeader(charset)
708 Outputs the HTTP headers for an HTML page. The optional charset parameter
709 can be used to set a character set. Normally this function is not called
710 directly, but is rather called by ui_print_header or header.
715 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
716 print "pragma: no-cache\n";
717 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
718 print "Cache-Control: no-store, no-cache, must-revalidate\n";
719 print "Cache-Control: post-check=0, pre-check=0\n";
721 if (defined($_[0])) {
722 print "Content-type: text/html; Charset=$_[0]\n\n";
725 print "Content-type: text/html\n\n";
729 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
731 Outputs a Webmin HTML page header with a title, including HTTP headers. The
734 =item title - The text to show at the top of the page
736 =item image - An image to show instead of the title text. This is typically left blank.
738 =item help - If set, this is the name of a help page that will be linked to in the title.
740 =item config - If set to 1, the title will contain a link to the module's config page.
742 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
744 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
746 =item rightside - HTML to be shown on the right-hand side of the title. Can contain multiple lines, separated by <br>. Typically this is used for links to stop, start or restart servers.
748 =item head-stuff - HTML to be included in the <head> section of the page.
750 =item body-stuff - HTML attributes to be include in the <body> tag.
752 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
757 return if ($main::done_webmin_header++);
759 my $charset = defined($main::force_charset) ? $main::force_charset
761 &PrintHeader($charset);
762 &load_theme_library();
763 if (defined(&theme_header)) {
764 $module_name = &get_module_name();
768 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
771 if (defined(&theme_prehead)) {
775 print "<meta http-equiv=\"Content-Type\" ",
776 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
779 my $title = &get_html_title($_[0]);
780 print "<title>$title</title>\n";
781 print $_[7] if ($_[7]);
782 print &get_html_status_line(0);
784 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
785 if ($tconfig{'headinclude'}) {
787 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
794 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
795 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
796 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
797 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
798 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
799 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
800 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
802 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
804 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
805 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
806 if (defined(&theme_prebody)) {
809 my $hostname = &get_display_hostname();
810 my $version = &get_webmin_version();
811 my $prebody = $tconfig{'prebody'};
813 $prebody =~ s/%HOSTNAME%/$hostname/g;
814 $prebody =~ s/%VERSION%/$version/g;
815 $prebody =~ s/%USER%/$remote_user/g;
816 $prebody =~ s/%OS%/$os_type $os_version/g;
819 if ($tconfig{'prebodyinclude'}) {
821 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
828 print $tconfig{'preheader'};
829 my %this_module_info = &get_module_info(&get_module_name());
830 print "<table class='header' width=100%><tr>\n";
831 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
832 print "<td id='headln1' colspan=3 align=center>\n";
833 print &get_html_status_line(1);
834 print "</td></tr> <tr>\n";
836 print "<td id='headln2l' width=15% valign=top align=left>";
837 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
838 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
839 "$text{'header_servers'}</a><br>\n";
841 if (!$_[5] && !$tconfig{'noindex'}) {
842 my @avail = &get_available_module_infos(1);
843 my $nolo = $ENV{'ANONYMOUS_USER'} ||
844 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
845 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
846 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
848 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
849 "$text{'main_logout'}</a><br>";
851 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
852 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
853 "$text{'main_switch'}</a><br>";
855 elsif (!$gconfig{'gotoone'} || @avail > 1) {
856 print "<a href='$gconfig{'webprefix'}/?cat=",
857 $this_module_info{'category'},
858 "'>$text{'header_webmin'}</a><br>\n";
861 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
862 my $idx = $this_module_info{'index_link'};
863 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
864 my $mt = $module_index_name || $text{'header_module'};
865 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
867 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
868 !$tconfig{'nohelp'}) {
869 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
872 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
873 !$tconfig{'nohelp'}) {
874 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
877 my %access = &get_module_acl();
878 if (!$access{'noconfig'} && !$config{'noprefs'}) {
879 my $cprog = $user_module_config_directory ?
880 "uconfig.cgi" : "config.cgi";
881 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
882 &get_module_name()."\">",
883 $text{'header_config'},"</a><br>\n";
888 # Title is a single image
889 print "<td id='headln2c' align=center width=70%>",
890 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
894 my $ts = defined($tconfig{'titlesize'}) ?
895 $tconfig{'titlesize'} : "+2";
896 print "<td id='headln2c' align=center width=70%>",
897 ($ts ? "<font size=$ts>" : ""),$_[0],
898 ($ts ? "</font>" : "");
899 print "<br>$_[9]\n" if ($_[9]);
902 print "<td id='headln2r' width=15% valign=top align=right>";
904 print "</td></tr></table>\n";
905 print $tconfig{'postheader'};
909 =head2 get_html_title(title)
911 Returns the full string to appear in the HTML <title> block.
918 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
919 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
920 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
921 $title = sprintf "%s : %s on %s (%s %s)\n",
922 $msg, $remote_user, &get_display_hostname(),
923 $os_type, $os_version;
925 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
926 $title = sprintf "%s on %s (%s %s)\n",
927 $remote_user, &get_display_hostname(),
928 $os_type, $os_version;
933 if ($gconfig{'showlogin'} && $remote_user) {
934 $title = $remote_user." : ".$title;
939 =head2 get_html_framed_title
941 Returns the title text for a framed theme main page.
944 sub get_html_framed_title
947 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
948 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
950 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
951 # Alternate title mode requested
952 $title = sprintf "%s on %s (%s %s)\n",
953 $remote_user, &get_display_hostname(),
954 $os_type, $os_version;
957 # Title like 'Webmin x.yy on hostname (Linux 6)'
958 if ($os_version eq "*") {
962 $ostr = "$os_type $os_version";
964 my $host = &get_display_hostname();
965 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
966 &text('main_title', &get_webmin_version(), $host, $ostr);
967 if ($gconfig{'showlogin'}) {
968 $title = $remote_user." : ".$title;
974 =head2 get_html_status_line(text-only)
976 Returns HTML for a script block that sets the status line, or if text-only
977 is set to 1, just return the status line text.
980 sub get_html_status_line
983 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
984 # Disabled in this mode
987 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
988 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
989 my $line = &text('header_statusmsg',
990 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
992 ($ENV{'SSL_USER'} ? " (SSL certified)" :
993 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
994 $text{'programname'},
995 &get_webmin_version(),
996 &get_display_hostname(),
997 $os_type.($os_version eq "*" ? "" :" $os_version"));
1002 $line =~ s/\r|\n//g;
1003 return "<script language=JavaScript type=text/javascript>\n".
1004 "defaultStatus=\""."e_escape($line)."\";\n".
1009 =head2 popup_header([title], [head-stuff], [body-stuff])
1011 Outputs a page header, suitable for a popup window. If no title is given,
1012 absolutely no decorations are output. Also useful in framesets. The parameters
1015 =item title - Title text for the popup window.
1017 =item head-stuff - HTML to appear in the <head> section.
1019 =item body-stuff - HTML attributes to be include in the <body> tag.
1024 return if ($main::done_webmin_header++);
1026 my $charset = defined($main::force_charset) ? $main::force_charset
1028 &PrintHeader($charset);
1029 &load_theme_library();
1030 if (defined(&theme_popup_header)) {
1031 &theme_popup_header(@_);
1034 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1037 if (defined(&theme_popup_prehead)) {
1038 &theme_popup_prehead(@_);
1040 print "<title>$_[0]</title>\n";
1042 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1043 if ($tconfig{'headinclude'}) {
1045 open(INC, "$theme_root_directory/$tconfig{'headinclude'}");
1052 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1053 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1054 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1055 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1056 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1057 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1058 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1060 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1061 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1062 if (defined(&theme_popup_prebody)) {
1063 &theme_popup_prebody(@_);
1067 =head2 footer([page, name]+, [noendbody])
1069 Outputs the footer for a Webmin HTML page, possibly with links back to other
1070 pages. The links are specified by pairs of parameters, the first of which is
1071 a link destination, and the second the link text. For example :
1073 footer('/', 'Webmin index', '', 'Module menu');
1078 &load_theme_library();
1079 my %this_module_info = &get_module_info(&get_module_name());
1080 if (defined(&theme_footer)) {
1081 $module_name = &get_module_name(); # Old themes use these
1082 %module_info = %this_module_info;
1086 for(my $i=0; $i+1<@_; $i+=2) {
1088 if ($url ne '/' || !$tconfig{'noindex'}) {
1090 $url = "/?cat=$this_module_info{'category'}";
1092 elsif ($url eq '' && &get_module_name()) {
1093 $url = "/".&get_module_name()."/".
1094 $this_module_info{'index_link'};
1096 elsif ($url =~ /^\?/ && &get_module_name()) {
1097 $url = "/".&get_module_name()."/$url";
1099 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1101 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1106 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1111 my $postbody = $tconfig{'postbody'};
1113 my $hostname = &get_display_hostname();
1114 my $version = &get_webmin_version();
1115 my $os_type = $gconfig{'real_os_type'} ||
1116 $gconfig{'os_type'};
1117 my $os_version = $gconfig{'real_os_version'} ||
1118 $gconfig{'os_version'};
1119 $postbody =~ s/%HOSTNAME%/$hostname/g;
1120 $postbody =~ s/%VERSION%/$version/g;
1121 $postbody =~ s/%USER%/$remote_user/g;
1122 $postbody =~ s/%OS%/$os_type $os_version/g;
1123 print "$postbody\n";
1125 if ($tconfig{'postbodyinclude'}) {
1127 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1133 if (defined(&theme_postbody)) {
1134 &theme_postbody(@_);
1136 print "</body></html>\n";
1142 Outputs html for a footer for a popup window, started by popup_header.
1147 &load_theme_library();
1148 if (defined(&theme_popup_footer)) {
1149 &theme_popup_footer(@_);
1152 print "</body></html>\n";
1155 =head2 load_theme_library
1157 Immediately loads the current theme's theme.pl file. Not generally useful for
1158 most module developers, as this is called automatically by the header function.
1161 sub load_theme_library
1163 return if (!$current_theme || $loaded_theme_library++);
1164 for(my $i=0; $i<@theme_root_directories; $i++) {
1165 if ($theme_configs[$i]->{'functions'}) {
1166 do $theme_root_directories[$i]."/".
1167 $theme_configs[$i]->{'functions'};
1172 =head2 redirect(url)
1174 Output HTTP headers to redirect the browser to some page. The url parameter is
1175 typically a relative URL like index.cgi or list_users.cgi.
1180 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1181 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1182 ":$ENV{'SERVER_PORT'}";
1183 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1184 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1186 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1187 # Absolute URL (like http://...)
1190 elsif ($_[0] =~ /^\//) {
1191 # Absolute path (like /foo/bar.cgi)
1192 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1194 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1195 # Relative URL (like foo.cgi)
1196 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1199 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1201 &load_theme_library();
1202 if (defined(&theme_redirect)) {
1203 $module_name = &get_module_name(); # Old themes use these
1204 %module_info = &get_module_info($module_name);
1205 &theme_redirect($_[0], $url);
1208 print "Location: $url\n\n";
1212 =head2 kill_byname(name, signal)
1214 Finds a process whose command line contains the given name (such as httpd), and
1215 sends some signal to it. The signal can be numeric (like 9) or named
1221 my @pids = &find_byname($_[0]);
1222 return scalar(@pids) if (&is_readonly_mode());
1223 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1224 if ($gconfig{'debug_what_procs'});
1225 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1229 =head2 kill_byname_logged(name, signal)
1231 Like kill_byname, but also logs the killing.
1234 sub kill_byname_logged
1236 my @pids = &find_byname($_[0]);
1237 return scalar(@pids) if (&is_readonly_mode());
1238 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1242 =head2 find_byname(name)
1244 Finds processes searching for the given name in their command lines, and
1245 returns a list of matching PIDs.
1250 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1251 # Linux with /proc filesystem .. use cmdline files, as this is
1252 # faster than forking
1254 opendir(PROCDIR, "/proc");
1255 foreach my $f (readdir(PROCDIR)) {
1256 if ($f eq int($f) && $f != $$) {
1257 my $line = &read_file_contents("/proc/$f/cmdline");
1258 if ($line =~ /$_[0]/) {
1267 if (&foreign_check("proc")) {
1268 # Call the proc module
1269 &foreign_require("proc", "proc-lib.pl");
1270 if (defined(&proc::list_processes)) {
1271 my @procs = &proc::list_processes();
1273 foreach my $p (@procs) {
1274 if ($p->{'args'} =~ /$_[0]/) {
1275 push(@pids, $p->{'pid'});
1278 @pids = grep { $_ != $$ } @pids;
1283 # Fall back to running a command
1285 $cmd = $gconfig{'find_pid_command'};
1286 $cmd =~ s/NAME/"$_[0]"/g;
1287 $cmd = &translate_command($cmd);
1288 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1289 @pids = grep { $_ != $$ } @pids;
1293 =head2 error([message]+)
1295 Display an error message and exit. This should be used by CGI scripts that
1296 encounter a fatal error or invalid user input to notify users of the problem.
1297 If error_setup has been called, the displayed error message will be prefixed
1298 by the message setup using that function.
1303 my $msg = join("", @_);
1304 $msg =~ s/<[^>]*>//g;
1305 if (!$main::error_must_die) {
1306 print STDERR "Error: ",$msg,"\n";
1308 &load_theme_library();
1309 if ($main::error_must_die) {
1310 if ($gconfig{'error_stack'}) {
1311 print STDERR "Error: ",$msg,"\n";
1312 for(my $i=0; my @stack = caller($i); $i++) {
1313 print STDERR "File: $stack[1] Line: $stack[2] ",
1314 "Function: $stack[3]\n";
1319 elsif (!$ENV{'REQUEST_METHOD'}) {
1320 # Show text-only error
1321 print STDERR "$text{'error'}\n";
1322 print STDERR "-----\n";
1323 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1325 print STDERR "-----\n";
1326 if ($gconfig{'error_stack'}) {
1328 print STDERR $text{'error_stack'},"\n";
1329 for(my $i=0; my @stack = caller($i); $i++) {
1330 print STDERR &text('error_stackline',
1331 $stack[1], $stack[2], $stack[3]),"\n";
1336 elsif (defined(&theme_error)) {
1340 &header($text{'error'}, "");
1342 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1344 if ($gconfig{'error_stack'}) {
1346 print "<h3>$text{'error_stack'}</h3>\n";
1348 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1349 "<td><b>$text{'error_line'}</b></td> ",
1350 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1351 for($i=0; my @stack = caller($i); $i++) {
1353 print "<td>$stack[1]</td>\n";
1354 print "<td>$stack[2]</td>\n";
1355 print "<td>$stack[3]</td>\n";
1361 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1362 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1368 &unlock_all_files();
1369 &cleanup_tempnames();
1373 =head2 popup_error([message]+)
1375 This function is almost identical to error, but displays the message with HTML
1376 headers suitable for a popup window.
1381 &load_theme_library();
1382 if ($main::error_must_die) {
1385 elsif (defined(&theme_popup_error)) {
1386 &theme_popup_error(@_);
1389 &popup_header($text{'error'}, "");
1390 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1393 &unlock_all_files();
1394 &cleanup_tempnames();
1398 =head2 error_setup(message)
1400 Registers a message to be prepended to all error messages displayed by the
1406 $main::whatfailed = $_[0];
1409 =head2 wait_for(handle, regexp, regexp, ...)
1411 Reads from the input stream until one of the regexps matches, and returns the
1412 index of the matching regexp, or -1 if input ended before any matched. This is
1413 very useful for parsing the output of interactive programs, and can be used with
1414 a two-way pipe to feed input to a program in response to output matched by
1417 If the matching regexp contains bracketed sub-expressions, their values will
1418 be placed in the global array @matches, indexed starting from 1. You cannot
1419 use the Perl variables $1, $2 and so on to capture matches.
1423 $rv = wait_for($loginfh, "username:");
1425 error("Didn't get username prompt");
1427 print $loginfh "joe\n";
1428 $rv = wait_for($loginfh, "password:");
1430 error("Didn't get password prompt");
1432 print $loginfh "smeg\n";
1437 my ($c, $i, $sw, $rv, $ha);
1438 undef($wait_for_input);
1439 if ($wait_for_debug) {
1440 print STDERR "wait_for(",join(",", @_),")\n";
1442 $ha = &callers_package($_[0]);
1443 if ($wait_for_debug) {
1444 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1449 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1450 " \$wait_for_input .= \$c;\n";
1451 if ($wait_for_debug) {
1452 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1454 for($i=1; $i<@_; $i++) {
1455 $sw = $i>1 ? "elsif" : "if";
1456 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1459 " if (defined(\$hit)) {\n".
1460 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1466 &error("wait_for error : $@\n");
1471 =head2 fast_wait_for(handle, string, string, ...)
1473 This function behaves very similar to wait_for (documented above), but instead
1474 of taking regular expressions as parameters, it takes strings. As soon as the
1475 input contains one of them, it will return the index of the matching string.
1476 If the input ends before any match, it returns -1.
1481 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1482 for($i=1; $i<@_; $i++) {
1483 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1487 if (($c = getc($ha)) eq "") {
1488 &error("fast_wait_for read error : $!");
1491 if (length($inp) > $maxlen) {
1492 $inp = substr($inp, length($inp)-$maxlen);
1494 $inpl = length($inp);
1495 for($i=1; $i<@_; $i++) {
1496 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1503 =head2 has_command(command)
1505 Returns the full path to the executable if some command is in the path, or
1506 undef if not found. If the given command is already an absolute path and
1507 exists, then the same path will be returned.
1512 if (!$_[0]) { return undef; }
1513 if (exists($main::has_command_cache{$_[0]})) {
1514 return $main::has_command_cache{$_[0]};
1517 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1518 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1519 # Absolute path given - just use it
1520 my $t = &translate_filename($_[0]);
1521 $rv = (-x $t && !-d _) ? $_[0] : undef;
1524 # Check each directory in the path
1526 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1527 next if ($donedir{$d}++);
1528 $d =~ s/$slash$// if ($d ne $slash);
1529 my $t = &translate_filename("$d/$_[0]");
1530 if (-x $t && !-d _) {
1531 $rv = $d.$slash.$_[0];
1534 if ($gconfig{'os_type'} eq 'windows') {
1535 foreach my $sfx (".exe", ".com", ".bat") {
1536 my $t = &translate_filename("$d/$_[0]").$sfx;
1537 if (-r $t && !-d _) {
1538 $rv = $d.$slash.$_[0].$sfx;
1545 $main::has_command_cache{$_[0]} = $rv;
1549 =head2 make_date(seconds, [date-only], [fmt])
1551 Converts a Unix date/time in seconds to a human-readable form, by default
1552 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1554 =item seconds - Unix time is seconds to convert.
1556 =item date-only - If set to 1, exclude the time from the returned string.
1558 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1563 my ($secs, $only, $fmt) = @_;
1564 my @tm = localtime($secs);
1567 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1569 if ($fmt eq 'dd/mon/yyyy') {
1570 $date = sprintf "%2.2d/%s/%4.4d",
1571 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1573 elsif ($fmt eq 'dd/mm/yyyy') {
1574 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1576 elsif ($fmt eq 'mm/dd/yyyy') {
1577 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1579 elsif ($fmt eq 'yyyy/mm/dd') {
1580 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1583 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1588 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1590 Return HTML for a button that pops up a file chooser when clicked, and places
1591 the selected filename into another HTML field. The parameters are :
1593 =item input - Name of the form field to store the filename in.
1595 =item type - 0 for file or directory chooser, or 1 for directory only.
1597 =item form - Index of the form containing the button.
1599 =item chroot - If set to 1, the chooser will be limited to this directory.
1601 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1604 sub file_chooser_button
1606 return &theme_file_chooser_button(@_)
1607 if (defined(&theme_file_chooser_button));
1608 my $form = defined($_[2]) ? $_[2] : 0;
1609 my $chroot = defined($_[3]) ? $_[3] : "/";
1610 my $add = int($_[4]);
1611 my ($w, $h) = (400, 300);
1612 if ($gconfig{'db_sizefile'}) {
1613 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1615 return "<input type=button onClick='ifield = form.$_[0]; chooser = window.open(\"$gconfig{'webprefix'}/chooser.cgi?add=$add&type=$_[1]&chroot=$chroot&file=\"+escape(ifield.value), \"chooser\", \"toolbar=no,menubar=no,scrollbars=no,resizable=yes,width=$w,height=$h\"); chooser.ifield = ifield; window.ifield = ifield' value=\"...\">\n";
1618 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1620 Returns HTML for a button that will popup a chooser window of some kind. The
1623 =item url - Base URL of the popup window's contents
1625 =item width - Width of the window in pixels
1627 =item height - Height in pixels
1629 =item scrollbars - Set to 1 if the window should have scrollbars
1631 The field-mappings parameter is an array ref of array refs containing
1633 =item - Attribute to assign field to in the popup window
1635 =item - Form field name
1637 =item - CGI parameter to URL for value, if any
1640 sub popup_window_button
1642 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1643 my ($url, $w, $h, $scroll, $fields) = @_;
1644 my $scrollyn = $scroll ? "yes" : "no";
1645 my $rv = "<input type=button onClick='";
1646 foreach my $m (@$fields) {
1647 $rv .= "$m->[0] = form.$m->[1]; ";
1649 my $sep = $url =~ /\?/ ? "&" : "?";
1650 $rv .= "chooser = window.open(\"$url\"";
1651 foreach my $m (@$fields) {
1653 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1657 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1658 foreach my $m (@$fields) {
1659 $rv .= "chooser.$m->[0] = $m->[0]; ";
1660 $rv .= "window.$m->[0] = $m->[0]; ";
1662 $rv .= "' value=\"...\">";
1666 =head2 read_acl(&user-module-hash, &user-list-hash)
1668 Reads the Webmin acl file into the given hash references. The first is indexed
1669 by a combined key of username,module , with the value being set to 1 when
1670 the user has access to that module. The second is indexed by username, with
1671 the value being an array ref of allowed modules.
1673 This function is deprecated in favour of foreign_available, which performs a
1674 more comprehensive check of module availability.
1679 if (!defined(%main::acl_hash_cache)) {
1681 open(ACL, &acl_filename());
1683 if (/^([^:]+):\s*(.*)/) {
1685 my @mods = split(/\s+/, $2);
1686 foreach my $m (@mods) {
1687 $main::acl_hash_cache{$user,$m}++;
1689 $main::acl_array_cache{$user} = \@mods;
1694 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1695 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1700 Returns the file containing the webmin ACL, which is usually
1701 /etc/webmin/webmin.acl.
1706 return "$config_directory/webmin.acl";
1711 Does nothing, but kept around for compatability.
1718 =head2 get_miniserv_config(&hash)
1720 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1721 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1725 sub get_miniserv_config
1727 return &read_file_cached(
1728 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1731 =head2 put_miniserv_config(&hash)
1733 Writes out the Webmin webserver configuration file from the contents of
1734 the given hash ref. This should be initially populated by get_miniserv_config,
1737 get_miniserv_config(\%miniserv);
1738 $miniserv{'port'} = 10005;
1739 put_miniserv_config(\%miniserv);
1743 sub put_miniserv_config
1745 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1749 =head2 restart_miniserv([nowait])
1751 Kill the old miniserv process and re-start it, then optionally waits for
1752 it to restart. This will apply all configuration settings.
1755 sub restart_miniserv
1758 return undef if (&is_readonly_mode());
1760 &get_miniserv_config(\%miniserv) || return;
1763 if ($gconfig{'os_type'} ne 'windows') {
1764 # On Unix systems, we can restart with a signal
1765 my ($pid, $addr, $i);
1766 $miniserv{'inetd'} && return;
1767 my @oldst = stat($miniserv{'pidfile'});
1768 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1771 if (!$pid) { &error("Invalid PID file"); }
1773 # Just signal miniserv to restart
1774 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1776 # Wait till new PID is written, indicating a restart
1777 for($i=0; $i<60; $i++) {
1779 my @newst = stat($miniserv{'pidfile'});
1780 last if ($newst[9] != $oldst[9]);
1782 $i < 60 || &error("Webmin server did not write new PID file");
1784 ## Totally kill the process and re-run it
1785 #$SIG{'TERM'} = 'IGNORE';
1786 #&kill_logged('TERM', $pid);
1787 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1790 # On Windows, we need to use the flag file
1791 open(TOUCH, ">$miniserv{'restartflag'}");
1796 # wait for miniserv to come back up
1797 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1799 for($i=0; $i<20; $i++) {
1801 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1802 my $rv = connect(STEST,
1803 pack_sockaddr_in($miniserv{'port'}, $addr));
1805 last if ($rv && ++$ok >= 2);
1807 $i < 20 || &error("Failed to restart Webmin server!");
1811 =head2 reload_miniserv
1813 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1814 configuration files. Not all changes will be applied though, such as the
1815 IP addresses and ports to accept connections on.
1820 return undef if (&is_readonly_mode());
1822 &get_miniserv_config(\%miniserv) || return;
1824 if ($gconfig{'os_type'} ne 'windows') {
1825 # Send a USR1 signal to re-read the config
1826 my ($pid, $addr, $i);
1827 $miniserv{'inetd'} && return;
1828 open(PID, $miniserv{'pidfile'}) || &error("Failed to open PID file");
1831 if (!$pid) { &error("Invalid PID file"); }
1832 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1834 # Make sure this didn't kill Webmin!
1836 if (!kill(0, $pid)) {
1837 print STDERR "USR1 signal killed Webmin - restarting\n";
1838 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1842 # On Windows, we need to use the flag file
1843 open(TOUCH, ">$miniserv{'reloadflag'}");
1848 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1850 Returns 1 if some module is supported on the current operating system, or the
1851 OS supplies as parameters. The parameters are :
1853 =item minfo - A hash ref of module information, as returned by get_module_info
1855 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1857 =item os-version - The Webmin OS version to use, such as 13.0
1859 =item api-only - If set to 1, considers a module supported if it provides an API to other modules on this OS, even if the majority of its functionality is not supported.
1862 sub check_os_support
1864 my $oss = $_[0]->{'os_support'};
1865 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1866 # May provide usable API
1867 $oss .= " ".$_[0]->{'api_os_support'};
1869 if ($_[0]->{'nozone'} && &running_in_zone()) {
1870 # Not supported in a Solaris Zone
1873 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1874 # Not supported in a Linux vserver
1877 return 1 if (!$oss || $oss eq '*');
1878 my $osver = $_[2] || $gconfig{'os_version'};
1879 my $ostype = $_[1] || $gconfig{'os_type'};
1882 my ($os, $ver, $codes);
1883 my ($neg) = ($oss =~ s/^!//); # starts with !
1884 $anyneg++ if ($neg);
1885 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1887 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1889 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1891 $os = $1; $ver = $2; $oss = $3;
1893 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1895 $os = $1; $codes = $2; $oss = $3;
1897 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1899 $codes = $1; $oss = $2;
1901 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1903 $os = $1; $oss = $2;
1906 next if ($os && !($os eq $ostype ||
1907 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1908 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1909 next if ($osver < $1 || $osver > $2);
1911 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1912 next if ($osver < $1);
1914 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1915 next if ($osver > $1);
1918 next if ($ver ne $osver);
1920 next if ($codes && !eval $codes);
1926 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1928 Downloads data from a HTTP url to a local file or string. The parameters are :
1930 =item host - The hostname part of the URL, such as www.google.com
1932 =item port - The HTTP port number, such as 80
1934 =item page - The filename part of the URL, like /index.html
1936 =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.
1938 =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.
1940 =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.
1942 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
1944 =item user - If set, HTTP authentication is done with this username.
1946 =item pass - The HTTP password to use with the username above.
1948 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
1950 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
1952 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
1954 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
1959 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
1960 $timeout, $osdn, $nocache, $headers) = @_;
1961 if ($gconfig{'debug_what_net'}) {
1962 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
1963 ($user ? " user=$user pass=$pass" : "").
1964 (ref($dest) ? "" : " dest=$dest"));
1967 # Convert OSDN URL first
1968 my $prot = $ssl ? "https://" : "http://";
1969 my $portstr = $ssl && $port == 443 ||
1970 !$ssl && $port == 80 ? "" : ":$port";
1971 ($host, $port, $page, $ssl) = &parse_http_url(
1972 &convert_osdn_url($prot.$host.$portstr.$page));
1975 # Check if we already have cached the URL
1976 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
1977 my $cfile = &check_in_http_cache($url);
1978 if ($cfile && !$nocache) {
1979 # Yes! Copy to dest file or variable
1980 &$cbfunc(6, $url) if ($cbfunc);
1982 &open_readfile(CACHEFILE, $cfile);
1984 $$dest = <CACHEFILE>;
1988 ©_source_dest($cfile, $dest);
1995 push(@headers, [ "Host", $host ]);
1996 push(@headers, [ "User-agent", "Webmin" ]);
1998 my $auth = &encode_base64("$user:$pass");
1999 $auth =~ tr/\r\n//d;
2000 push(@headers, [ "Authorization", "Basic $auth" ]);
2002 foreach my $hname (keys %$headers) {
2003 push(@headers, [ $hname, $headers->{$hname} ]);
2006 # Actually download it
2007 $main::download_timed_out = undef;
2008 local $SIG{ALRM} = \&download_timeout;
2009 alarm($timeout || 60);
2010 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2012 $h = $main::download_timed_out if ($main::download_timed_out);
2014 if ($error) { $$error = $h; return; }
2015 else { &error($h); }
2017 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2019 if ((!$error || !$$error) && !$nocache) {
2020 &write_to_http_cache($url, $dest);
2024 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl])
2026 Do a HTTP download, after the headers have been sent. For internal use only,
2027 typically called by http_download.
2030 sub complete_http_download
2032 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2038 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2039 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2041 if ($_[2]) { ${$_[2]} = $line; return; }
2042 else { &error("Download failed : $line"); }
2045 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2048 $line = &read_http_connection($_[0]);
2049 $line =~ tr/\r\n//d;
2050 $line =~ /^(\S+):\s+(.*)$/ || last;
2051 $header{lc($1)} = $2;
2052 push(@headers, [ lc($1), $2 ]);
2055 if ($main::download_timed_out) {
2056 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2057 else { &error($main::download_timed_out); }
2059 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2060 if ($rcode >= 300 && $rcode < 400) {
2061 # follow the redirect
2062 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2063 my ($host, $port, $page, $ssl);
2064 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2065 $ssl = $1 eq 'https' ? 1 : 0;
2066 $host = $2; $port = $3; $page = $4 || "/";
2068 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2069 $ssl = $1 eq 'https' ? 1 : 0;
2070 $host = $2; $port = 80; $page = $3 || "/";
2072 elsif ($header{'location'} =~ /^\// && $_[5]) {
2073 # Relative to same server
2077 $page = $header{'location'};
2079 elsif ($header{'location'}) {
2080 # Assume relative to same dir .. not handled
2081 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2082 else { &error("Invalid Location header $header{'location'}"); }
2085 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2086 else { &error("Missing Location header"); }
2089 ($page, $params) = split(/\?/, $page);
2091 $page .= "?".$params if (defined($params));
2092 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2093 undef, undef, undef, $_[4], 0, $_[7]);
2098 # Append to a variable
2099 while(defined($buf = &read_http_connection($_[0], 1024))) {
2101 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2107 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2108 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2109 else { &error("Failed to write to $_[1] : $!"); }
2111 binmode(PFILE); # For windows
2112 while(defined($buf = &read_http_connection($_[0], 1024))) {
2113 &print_tempfile(PFILE, $buf);
2114 $got += length($buf);
2115 &$cbfunc(3, $got) if ($cbfunc);
2117 &close_tempfile(PFILE);
2118 if ($header{'content-length'} &&
2119 $got != $header{'content-length'}) {
2120 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2121 else { &error("Download incomplete"); }
2124 &$cbfunc(4) if ($cbfunc);
2126 &close_http_connection($_[0]);
2130 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2132 Download data from an FTP site to a local file. The parameters are :
2134 =item host - FTP server hostname
2136 =item file - File on the FTP server to download
2138 =item destfile - File on the Webmin system to download data to
2140 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2142 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2144 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2146 =item pass - Password for the username above.
2148 =item port - FTP server port number, which defaults to 21 if not set.
2153 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2155 if ($gconfig{'debug_what_net'}) {
2156 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2157 ($user ? " user=$user pass=$pass" : "").
2158 (ref($dest) ? "" : " dest=$dest"));
2162 if (&is_readonly_mode()) {
2163 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2165 else { &error("FTP connections not allowed in readonly mode"); }
2168 # Check if we already have cached the URL
2169 my $url = "ftp://".$host.$file;
2170 my $cfile = &check_in_http_cache($url);
2172 # Yes! Copy to dest file or variable
2173 &$cbfunc(6, $url) if ($cbfunc);
2175 &open_readfile(CACHEFILE, $cfile);
2177 $$dest = <CACHEFILE>;
2181 ©_source_dest($cfile, $dest);
2186 # Actually download it
2187 $main::download_timed_out = undef;
2188 local $SIG{ALRM} = \&download_timeout;
2191 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2192 # download through http-style proxy
2194 if (&open_socket($1, $2, "SOCK", \$error)) {
2196 if ($main::download_timed_out) {
2198 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2199 else { &error($main::download_timed_out); }
2201 my $esc = $_[1]; $esc =~ s/ /%20/g;
2202 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2203 my $portstr = $port == 21 ? "" : ":$port";
2204 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2205 print SOCK "User-agent: Webmin\r\n";
2206 if ($gconfig{'proxy_user'}) {
2207 my $auth = &encode_base64(
2208 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2209 $auth =~ tr/\r\n//d;
2210 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2213 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2216 elsif (!$gconfig{'proxy_fallback'}) {
2218 if ($error) { $$error = $main::download_timed_out; return 0; }
2219 else { &error($main::download_timed_out); }
2224 # connect to host and login with real FTP protocol
2225 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2227 if ($main::download_timed_out) {
2228 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2229 else { &error($main::download_timed_out); }
2231 &ftp_command("", 2, $_[3]) || return 0;
2233 # Login as supplied user
2234 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2236 if (int($urv[1]/100) == 3) {
2237 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2241 # Login as anonymous
2242 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2244 if (int($urv[1]/100) == 3) {
2245 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2249 &$cbfunc(1, 0) if ($cbfunc);
2252 # get the file size and tell the callback
2253 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2254 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2255 defined($size) || return 0;
2257 &$cbfunc(2, int($size));
2261 my $pasv = &ftp_command("PASV", 2, $_[3]);
2262 defined($pasv) || return 0;
2263 $pasv =~ /\(([0-9,]+)\)/;
2264 @n = split(/,/ , $1);
2265 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2266 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2267 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2271 &open_tempfile(PFILE, ">$_[2]", 1);
2272 while(read(CON, $buf, 1024) > 0) {
2273 &print_tempfile(PFILE, $buf);
2274 $got += length($buf);
2275 &$cbfunc(3, $got) if ($cbfunc);
2277 &close_tempfile(PFILE);
2279 if ($got != $size) {
2280 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2281 else { &error("Download incomplete"); }
2283 &$cbfunc(4) if ($cbfunc);
2285 &ftp_command("", 2, $_[3]) || return 0;
2289 &ftp_command("QUIT", 2, $_[3]) || return 0;
2293 &write_to_http_cache($url, $dest);
2297 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2299 Upload data from a local file to an FTP site. The parameters are :
2301 =item host - FTP server hostname
2303 =item file - File on the FTP server to write to
2305 =item srcfile - File on the Webmin system to upload data from
2307 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2309 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2311 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2313 =item pass - Password for the username above.
2315 =item port - FTP server port number, which defaults to 21 if not set.
2322 if (&is_readonly_mode()) {
2323 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2325 else { &error("FTP connections not allowed in readonly mode"); }
2328 $main::download_timed_out = undef;
2329 local $SIG{ALRM} = \&download_timeout;
2332 # connect to host and login
2333 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2335 if ($main::download_timed_out) {
2336 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2337 else { &error($main::download_timed_out); }
2339 &ftp_command("", 2, $_[3]) || return 0;
2341 # Login as supplied user
2342 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2344 if (int($urv[1]/100) == 3) {
2345 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2349 # Login as anonymous
2350 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2352 if (int($urv[1]/100) == 3) {
2353 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2357 &$cbfunc(1, 0) if ($cbfunc);
2359 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2361 # get the file size and tell the callback
2362 my @st = stat($_[2]);
2364 &$cbfunc(2, $st[7]);
2368 my $pasv = &ftp_command("PASV", 2, $_[3]);
2369 defined($pasv) || return 0;
2370 $pasv =~ /\(([0-9,]+)\)/;
2371 @n = split(/,/ , $1);
2372 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2373 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2378 while(read(PFILE, $buf, 1024) > 0) {
2380 $got += length($buf);
2381 &$cbfunc(3, $got) if ($cbfunc);
2385 if ($got != $st[7]) {
2386 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2387 else { &error("Upload incomplete"); }
2389 &$cbfunc(4) if ($cbfunc);
2392 &ftp_command("", 2, $_[3]) || return 0;
2393 &ftp_command("QUIT", 2, $_[3]) || return 0;
2399 =head2 no_proxy(host)
2401 Checks if some host is on the no proxy list. For internal use by the
2402 http_download and ftp_download functions.
2407 my $ip = &to_ipaddress($_[0]);
2408 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2409 return 1 if ($_[0] =~ /\Q$n\E/ ||
2415 =head2 open_socket(host, port, handle, [&error])
2417 Open a TCP connection to some host and port, using a file handle. The
2420 =item host - Hostname or IP address to connect to.
2422 =item port - TCP port number.
2424 =item handle - A file handle name to use for the connection.
2426 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2431 my ($host, $port, $fh, $err) = @_;
2432 $fh = &callers_package($fh);
2434 if ($gconfig{'debug_what_net'}) {
2435 &webmin_debug_log('TCP', "host=$host port=$port");
2437 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2438 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2439 else { &error("Failed to create socket : $!"); }
2442 if (!($addr = inet_aton($host))) {
2443 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2444 else { &error("Failed to lookup IP address for $host"); }
2446 if ($gconfig{'bind_proxy'}) {
2447 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2448 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2449 else { &error("Failed to bind to source address : $!"); }
2452 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2453 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2454 else { &error("Failed to connect to $host:$port : $!"); }
2456 my $old = select($fh); $| =1; select($old);
2460 =head2 download_timeout
2462 Called when a download times out. For internal use only.
2465 sub download_timeout
2467 $main::download_timed_out = "Download timed out";
2470 =head2 ftp_command(command, expected, [&error], [filehandle])
2472 Send an FTP command, and die if the reply is not what was expected. Mainly
2473 for internal use by the ftp_download and ftp_upload functions.
2478 my ($cmd, $expect, $err, $fh) = @_;
2480 $fh = &callers_package($fh);
2483 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2485 print $fh "$cmd\r\n";
2488 if (!($line = <$fh>)) {
2490 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2491 else { &error("Failed to read reply to $what"); }
2493 $line =~ /^(...)(.)(.*)$/;
2496 foreach my $c (@$expect) {
2497 $found++ if (int($1/100) == $c);
2501 $found++ if (int($1/100) == $_[1]);
2505 if ($err) { $$err = "$what failed : $3"; return undef; }
2506 else { &error("$what failed : $3"); }
2511 # Need to skip extra stuff..
2513 if (!($line = <$fh>)) {
2515 if ($$err) { $$err = "Failed to read reply to $what";
2517 else { &error("Failed to read reply to $what"); }
2519 $line =~ /^(....)(.*)$/; $reply .= $2;
2520 if ($1 eq "$rcode ") { last; }
2524 return wantarray ? ($reply, $rcode) : $reply;
2527 =head2 to_ipaddress(hostname)
2529 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2530 it cannot be resolved.
2535 if (&check_ipaddress($_[0])) {
2539 my $hn = gethostbyname($_[0]);
2540 return undef if (!$hn);
2541 local @ip = unpack("CCCC", $hn);
2542 return join("." , @ip);
2546 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2548 Renders a 4-column table of icons. The useful parameters are :
2550 =item links - An array ref of link destination URLs for the icons.
2552 =item titles - An array ref of titles to appear under the icons.
2554 =item icons - An array ref of URLs for icon images.
2556 =item columns - Number of columns to layout the icons with. Defaults to 4.
2561 &load_theme_library();
2562 if (defined(&theme_icons_table)) {
2563 &theme_icons_table(@_);
2567 my $cols = $_[3] ? $_[3] : 4;
2568 my $per = int(100.0 / $cols);
2569 print "<table class='icons_table' width=100% cellpadding=5>\n";
2570 for(my $i=0; $i<@{$_[0]}; $i++) {
2571 if ($i%$cols == 0) { print "<tr>\n"; }
2572 print "<td width=$per% align=center valign=top>\n";
2573 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2574 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2575 $_[7]->[$i], $_[8]->[$i]);
2577 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2579 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2580 print "</tr>\n" if ($need_tr);
2584 =head2 replace_file_line(file, line, [newline]*)
2586 Replaces one line in some file with 0 or more new lines. The parameters are :
2588 =item file - Full path to some file, like /etc/hosts.
2590 =item line - Line number to replace, starting from 0.
2592 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2595 sub replace_file_line
2598 my $realfile = &translate_filename($_[0]);
2599 open(FILE, $realfile);
2602 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2603 else { splice(@lines, $_[1], 1); }
2604 &open_tempfile(FILE, ">$realfile");
2605 &print_tempfile(FILE, @lines);
2606 &close_tempfile(FILE);
2609 =head2 read_file_lines(file, [readonly])
2611 Returns a reference to an array containing the lines from some file. This
2612 array can be modified, and will be written out when flush_file_lines()
2613 is called. The parameters are :
2615 =item file - Full path to the file to read.
2617 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2621 $lref = read_file_lines("/etc/hosts");
2622 push(@$lref, "127.0.0.1 localhost");
2623 flush_file_lines("/etc/hosts");
2629 my ($package, $filename, $line) = caller;
2630 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2632 my $realfile = &translate_filename($_[0]);
2633 if (!$main::file_cache{$realfile}) {
2636 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2637 open(READFILE, $realfile);
2640 $eol = /\r\n$/ ? "\r\n" : "\n";
2646 $main::file_cache{$realfile} = \@lines;
2647 $main::file_cache_noflush{$realfile} = $_[1];
2648 $main::file_cache_eol{$realfile} = $eol || "\n";
2651 # Make read-write if currently readonly
2653 $main::file_cache_noflush{$realfile} = 0;
2656 return $main::file_cache{$realfile};
2659 =head2 flush_file_lines([file], [eol])
2661 Write out to a file previously read by read_file_lines to disk (except
2662 for those marked readonly). The parameters are :
2664 =item file - The file to flush out.
2666 =item eof - End-of-line character for each line. Defaults to \n.
2669 sub flush_file_lines
2673 local $trans = &translate_filename($_[0]);
2674 $main::file_cache{$trans} ||
2675 &error("flush_file_lines called on non-loaded file $trans");
2676 push(@files, $trans);
2679 @files = ( keys %main::file_cache );
2681 foreach my $f (@files) {
2682 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2683 if (!$main::file_cache_noflush{$f}) {
2684 &open_tempfile(FLUSHFILE, ">$f");
2685 foreach my $line (@{$main::file_cache{$f}}) {
2686 (print FLUSHFILE $line,$eol) ||
2687 &error(&text("efilewrite", $f, $!));
2689 &close_tempfile(FLUSHFILE);
2691 delete($main::file_cache{$f});
2692 delete($main::file_cache_noflush{$f});
2696 =head2 unflush_file_lines(file)
2698 Clear the internal cache of some given file, previously read by read_file_lines.
2701 sub unflush_file_lines
2703 my $realfile = &translate_filename($_[0]);
2704 delete($main::file_cache{$realfile});
2705 delete($main::file_cache_noflush{$realfile});
2708 =head2 unix_user_input(fieldname, user, [form])
2710 Returns HTML for an input to select a Unix user. By default this is a text
2711 box with a user popup button next to it.
2716 if (defined(&theme_unix_user_input)) {
2717 return &theme_unix_user_input(@_);
2719 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2720 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2723 =head2 unix_group_input(fieldname, user, [form])
2725 Returns HTML for an input to select a Unix group. By default this is a text
2726 box with a group popup button next to it.
2729 sub unix_group_input
2731 if (defined(&theme_unix_group_input)) {
2732 return &theme_unix_group_input(@_);
2734 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2735 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2738 =head2 hlink(text, page, [module], [width], [height])
2740 Returns HTML for a link that when clicked on pops up a window for a Webmin
2741 help page. The parameters are :
2743 =item text - Text for the link.
2745 =item page - Help page code, such as 'intro'.
2747 =item module - Module the help page is in. Defaults to the current module.
2749 =item width - Width of the help popup window. Defaults to 600 pixels.
2751 =item height - Height of the help popup window. Defaults to 400 pixels.
2753 The actual help pages are in each module's help sub-directory, in files with
2759 if (defined(&theme_hlink)) {
2760 return &theme_hlink(@_);
2762 my $mod = $_[2] ? $_[2] : &get_module_name();
2763 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2764 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2765 return "<a onClick='window.open(\"$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>";
2768 =head2 user_chooser_button(field, multiple, [form])
2770 Returns HTML for a javascript button for choosing a Unix user or users.
2771 The parameters are :
2773 =item field - Name of the HTML field to place the username into.
2775 =item multiple - Set to 1 if multiple users can be selected.
2777 =item form - Index of the form on the page.
2780 sub user_chooser_button
2782 return undef if (!&supports_users());
2783 return &theme_user_chooser_button(@_)
2784 if (defined(&theme_user_chooser_button));
2785 my $form = defined($_[2]) ? $_[2] : 0;
2786 my $w = $_[1] ? 500 : 300;
2788 if ($_[1] && $gconfig{'db_sizeusers'}) {
2789 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2791 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2792 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2794 return "<input type=button onClick='ifield = form.$_[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";
2797 =head2 group_chooser_button(field, multiple, [form])
2799 Returns HTML for a javascript button for choosing a Unix group or groups
2800 The parameters are :
2802 =item field - Name of the HTML field to place the group name into.
2804 =item multiple - Set to 1 if multiple groups can be selected.
2806 =item form - Index of the form on the page.
2809 sub group_chooser_button
2811 return undef if (!&supports_users());
2812 return &theme_group_chooser_button(@_)
2813 if (defined(&theme_group_chooser_button));
2814 my $form = defined($_[2]) ? $_[2] : 0;
2815 my $w = $_[1] ? 500 : 300;
2817 if ($_[1] && $gconfig{'db_sizeusers'}) {
2818 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2820 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2821 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2823 return "<input type=button onClick='ifield = form.$_[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";
2826 =head2 foreign_check(module, [api-only])
2828 Checks if some other module exists and is supported on this OS. The parameters
2831 =item module - Name of the module to check.
2833 =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.
2838 my ($mod, $api) = @_;
2840 my $mdir = &module_root_directory($mod);
2841 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2842 return &check_os_support(\%minfo, undef, undef, $api);
2845 =head2 foreign_exists(module)
2847 Checks if some other module exists. The module parameter is the short module
2853 my $mdir = &module_root_directory($_[0]);
2854 return -r "$mdir/module.info";
2857 =head2 foreign_available(module)
2859 Returns 1 if some module is installed, and acessible to the current user. The
2860 module parameter is the module directory name.
2863 sub foreign_available
2865 return 0 if (!&foreign_check($_[0]) &&
2866 !$gconfig{'available_even_if_no_support'});
2867 my %foreign_module_info = &get_module_info($_[0]);
2869 # Check list of allowed modules
2871 &read_acl(\%acl, undef);
2872 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2873 !$acl{$base_remote_user,'*'});
2875 # Check for usermod restrictions
2876 my @usermods = &list_usermods();
2877 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2879 if (&get_product_name() eq "webmin") {
2880 # Check if the user has any RBAC privileges in this module
2881 if (&supports_rbac($_[0]) &&
2882 &use_rbac_module_acl(undef, $_[0])) {
2883 # RBAC is enabled for this user and module - check if he
2885 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2886 return 0 if (!$rbacs);
2888 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2889 # If denying access to modules not specifically allowed by
2890 # RBAC, then prevent access
2895 # Check readonly support
2896 if (&is_readonly_mode()) {
2897 return 0 if (!$foreign_module_info{'readonly'});
2900 # Check if theme vetos
2901 if (defined(&theme_foreign_available)) {
2902 return 0 if (!&theme_foreign_available($_[0]));
2905 # Check if licence module vetos
2906 if ($main::licence_module) {
2907 return 0 if (!&foreign_call($main::licence_module,
2908 "check_module_licence", $_[0]));
2914 =head2 foreign_require(module, [file], [package])
2916 Brings in functions from another module, and places them in the Perl namespace
2917 with the same name as the module. The parameters are :
2919 =item module - The source module's directory name, like sendmail.
2921 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2923 =item package - Perl package to place the module's functions and global variables in.
2925 If the original module name contains dashes, they will be replaced with _ in
2931 my ($mod, $file, $pkg) = @_;
2932 $pkg ||= $mod || "global";
2933 $pkg =~ s/[^A-Za-z0-9]/_/g;
2936 push(@files, $file);
2940 my %minfo = &get_module_info($mod);
2941 if ($minfo{'library'}) {
2942 @files = split(/\s+/, $minfo{'library'});
2945 @files = ( $mod."-lib.pl" );
2948 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
2949 return 1 if (!@files);
2950 foreach my $f (@files) {
2951 $main::done_foreign_require{$pkg,$f}++;
2954 my $mdir = &module_root_directory($mod);
2955 @INC = &unique($mdir, @INC);
2956 -d $mdir || &error("Module $mod does not exist");
2957 if (!&get_module_name() && $mod) {
2960 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
2961 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
2962 my $code = "package $pkg; ".
2963 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
2964 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
2965 foreach my $f (@files) {
2966 $code .= "do '$mdir/$f' || die \$@; ";
2969 if (defined($old_fmn)) {
2970 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
2973 delete($ENV{'FOREIGN_MODULE_NAME'});
2975 if (defined($old_frd)) {
2976 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
2979 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
2982 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
2986 =head2 foreign_call(module, function, [arg]*)
2988 Call a function in another module. The module parameter is the target module
2989 directory name, function is the perl sub to call, and the remaining parameters
2990 are the arguments. However, unless you need to call a function whose name
2991 is dynamic, it is better to use Perl's cross-module function call syntax
2992 like module::function(args).
2997 my $pkg = $_[0] || "global";
2998 $pkg =~ s/[^A-Za-z0-9]/_/g;
2999 my @args = @_[2 .. @_-1];
3000 $main::foreign_args = \@args;
3001 my @rv = eval <<EOF;
3003 &$_[1](\@{\$main::foreign_args});
3005 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3006 return wantarray ? @rv : $rv[0];
3009 =head2 foreign_config(module, [user-config])
3011 Get the configuration from another module, and return it as a hash. If the
3012 user-config parameter is set to 1, returns the Usermin user-level preferences
3013 for the current user instead.
3018 my ($mod, $uc) = @_;
3021 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3022 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3023 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3026 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3031 =head2 foreign_installed(module, mode)
3033 Checks if the server for some module is installed, and possibly also checks
3034 if the module has been configured by Webmin.
3035 For mode 1, returns 2 if the server is installed and configured for use by
3036 Webmin, 1 if installed but not configured, or 0 otherwise.
3037 For mode 0, returns 1 if installed, 0 if not.
3038 If the module does not provide an install_check.pl script, assumes that
3039 the server is installed.
3042 sub foreign_installed
3044 my ($mod, $configured) = @_;
3045 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3047 return $main::foreign_installed_cache{$mod,$configured};
3051 if (!&foreign_check($mod)) {
3056 my $mdir = &module_root_directory($mod);
3057 if (!-r "$mdir/install_check.pl") {
3058 # Not known, assume OK
3059 $rv = $configured ? 2 : 1;
3062 # Call function to check
3063 &foreign_require($mod, "install_check.pl");
3064 $rv = &foreign_call($mod, "is_installed", $configured);
3067 $main::foreign_installed_cache{$mod,$configured} = $rv;
3072 =head2 foreign_defined(module, function)
3074 Returns 1 if some function is defined in another module. In general, it is
3075 simpler to use the syntax &defined(module::function) instead.
3081 $pkg =~ s/[^A-Za-z0-9]/_/g;
3082 my $func = "${pkg}::$_[1]";
3083 return defined(&$func);
3086 =head2 get_system_hostname([short])
3088 Returns the hostname of this system. If the short parameter is set to 1,
3089 then the domain name is not prepended - otherwise, Webmin will attempt to get
3090 the fully qualified hostname, like foo.example.com.
3093 sub get_system_hostname
3096 if (!$main::get_system_hostname[$m]) {
3097 if ($gconfig{'os_type'} ne 'windows') {
3098 # Try some common Linux hostname files first
3100 if ($gconfig{'os_type'} eq 'redhat-linux') {
3102 &read_env_file("/etc/sysconfig/network", \%nc);
3103 if ($nc{'HOSTNAME'}) {
3104 $fromfile = $nc{'HOSTNAME'};
3107 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3108 my $hn = &read_file_contents("/etc/hostname");
3114 elsif ($gconfig{'os_type'} eq 'open-linux') {
3115 my $hn = &read_file_contents("/etc/HOSTNAME");
3121 elsif ($gconfig{'os_type'} eq 'solaris') {
3122 my $hn = &read_file_contents("/etc/nodename");
3129 # If we found a hostname, use it if value
3130 if ($fromfile && ($m || $fromfile =~ /\./)) {
3132 $fromfile =~ s/\..*$//;
3134 $main::get_system_hostname[$m] = $fromfile;
3138 # Can use hostname command on Unix
3139 &execute_command("hostname", undef,
3140 \$main::get_system_hostname[$m], undef, 0, 1);
3141 chop($main::get_system_hostname[$m]);
3143 eval "use Sys::Hostname";
3145 $main::get_system_hostname[$m] = eval "hostname()";
3147 if ($@ || !$main::get_system_hostname[$m]) {
3148 $main::get_system_hostname[$m] = "UNKNOWN";
3151 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3152 $gconfig{'os_type'} =~ /linux$/ &&
3153 !$gconfig{'no_hostname_f'} && !$_[0]) {
3154 # Try with -f flag to get fully qualified name
3156 my $ex = &execute_command("hostname -f", undef, \$flag,
3159 if ($ex || $flag eq "") {
3160 # -f not supported! We have probably set the
3161 # hostname to just '-f'. Fix the problem
3164 &execute_command("hostname ".
3165 quotemeta($main::get_system_hostname[$m]),
3166 undef, undef, undef, 0, 1);
3170 $main::get_system_hostname[$m] = $flag;
3175 # On Windows, try computername environment variable
3176 return $ENV{'computername'} if ($ENV{'computername'});
3177 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3179 # Fall back to net name command
3180 my $out = `net name 2>&1`;
3181 if ($out =~ /\-+\r?\n(\S+)/) {
3182 $main::get_system_hostname[$m] = $1;
3185 $main::get_system_hostname[$m] = "windows";
3189 return $main::get_system_hostname[$m];
3192 =head2 get_webmin_version
3194 Returns the version of Webmin currently being run, such as 1.450.
3197 sub get_webmin_version
3199 if (!$get_webmin_version) {
3200 open(VERSION, "$root_directory/version") || return 0;
3201 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3204 return $get_webmin_version;
3207 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3209 Returns a hash containing access control options for the given user and module.
3210 By default the current username and module name are used. If the no-rbac flag
3211 is given, the permissions will not be updated based on the user's RBAC role
3212 (as seen on Solaris). If the no-default flag is given, default permissions for
3213 the module will not be included.
3218 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3219 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3220 my $mdir = &module_root_directory($m);
3223 # Read default ACL first, to be overridden by per-user settings
3224 &read_file_cached("$mdir/defaultacl", \%rv);
3226 # If this isn't a master admin user, apply the negative permissions
3227 # so that he doesn't un-expectedly gain access to new features
3229 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3230 if ($gaccess{'negative'}) {
3231 &read_file_cached("$mdir/negativeacl", \%rv);
3235 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3236 # RBAC overrides exist for this user in this module
3237 my $rbac = &get_rbac_module_acl(
3238 defined($_[0]) ? $_[0] : $remote_user, $m);
3239 foreach my $r (keys %$rbac) {
3240 $rv{$r} = $rbac->{$r};
3243 elsif ($gconfig{"risk_$u"} && $m) {
3244 # ACL is defined by user's risk level
3245 my $rf = $gconfig{"risk_$u"}.'.risk';
3246 &read_file_cached("$mdir/$rf", \%rv);
3248 my $sf = $gconfig{"skill_$u"}.'.skill';
3249 &read_file_cached("$mdir/$sf", \%rv);
3252 # Use normal Webmin ACL, if a user is set
3253 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3254 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3255 &read_file_cached("$config_directory/$m/$remote_user.acl",\%rv);
3258 if ($tconfig{'preload_functions'}) {
3259 &load_theme_library();
3261 if (defined(&theme_get_module_acl)) {
3262 %rv = &theme_get_module_acl($u, $m, \%rv);
3267 =head2 get_group_module_acl(group, [module])
3269 Returns the ACL for a Webmin group, in an optional module (which defaults to
3270 the current module).
3273 sub get_group_module_acl
3276 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3277 my $mdir = &module_root_directory($m);
3279 &read_file_cached("$mdir/defaultacl", \%rv);
3280 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3281 if (defined(&theme_get_module_acl)) {
3282 %rv = &theme_get_module_acl($g, $m, \%rv);
3287 =head2 save_module_acl(&acl, [user], [module])
3289 Updates the acl hash for some user and module. The parameters are :
3291 =item acl - Hash reference for the new access control options.
3293 =item user - User to update, defaulting to the current user.
3295 =item module - Module to update, defaulting to the caller.
3300 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3301 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3302 if (&foreign_check("acl")) {
3303 # Check if this user is a member of a group, and if he gets the
3304 # module from a group. If so, update its ACL as well
3305 &foreign_require("acl", "acl-lib.pl");
3307 foreach my $g (&acl::list_groups()) {
3308 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3309 &indexof($m, @{$g->{'modules'}}) >= 0) {
3315 &save_group_module_acl($_[0], $group->{'name'}, $m);
3318 if (!-d "$config_directory/$m") {
3319 mkdir("$config_directory/$m", 0755);
3321 &write_file("$config_directory/$m/$u.acl", $_[0]);
3324 =head2 save_group_module_acl(&acl, group, [module])
3326 Updates the acl hash for some group and module. The parameters are :
3328 =item acl - Hash reference for the new access control options.
3330 =item group - Group name to update.
3332 =item module - Module to update, defaulting to the caller.
3335 sub save_group_module_acl
3338 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3339 if (&foreign_check("acl")) {
3340 # Check if this group is a member of a group, and if it gets the
3341 # module from a group. If so, update the parent ACL as well
3342 &foreign_require("acl", "acl-lib.pl");
3344 foreach my $pg (&acl::list_groups()) {
3345 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3346 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3352 &save_group_module_acl($_[0], $group->{'name'}, $m);
3355 if (!-d "$config_directory/$m") {
3356 mkdir("$config_directory/$m", 0755);
3358 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3363 This function must be called by all Webmin CGI scripts, either directly or
3364 indirectly via a per-module lib.pl file. It performs a number of initialization
3365 and housekeeping tasks, such as working out the module name, checking that the
3366 current user has access to the module, and populating global variables. Some
3367 of the variables set include :
3369 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3371 =item $var_directory - Base logs directory, typically /var/webmin
3373 =item %config - Per-module configuration.
3375 =item %gconfig - Global configuration.
3377 =item $scriptname - Base name of the current perl script.
3379 =item $module_name - The name of the current module.
3381 =item $module_config_directory - The config directory for this module.
3383 =item $module_config_file - The config file for this module.
3385 =item $module_root_directory - This module's code directory.
3387 =item $webmin_logfile - The detailed logfile for webmin.
3389 =item $remote_user - The actual username used to login to webmin.
3391 =item $base_remote_user - The username whose permissions are in effect.
3393 =item $current_theme - The theme currently in use.
3395 =item $root_directory - The first root directory of this webmin install.
3397 =item @root_directories - All root directories for this webmin install.
3402 # Record first process ID that called this, so we know when it exited to clean
3404 $main::initial_process_id ||= $$;
3406 # Configuration and spool directories
3407 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3408 die "WEBMIN_CONFIG not set";
3410 $config_directory = $ENV{'WEBMIN_CONFIG'};
3411 if (!defined($ENV{'WEBMIN_VAR'})) {
3412 open(VARPATH, "$config_directory/var-path");
3413 chop($var_directory = <VARPATH>);
3417 $var_directory = $ENV{'WEBMIN_VAR'};
3419 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3420 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3422 if ($ENV{'SESSION_ID'}) {
3423 # Hide this variable from called programs, but keep it for internal use
3424 $main::session_id = $ENV{'SESSION_ID'};
3425 delete($ENV{'SESSION_ID'});
3427 if ($ENV{'REMOTE_PASS'}) {
3428 # Hide the password too
3429 $main::remote_pass = $ENV{'REMOTE_PASS'};
3430 delete($ENV{'REMOTE_PASS'});
3433 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3434 # Looks like we are running setuid, but the real UID hasn't been set.
3435 # Do so now, so that executed programs don't get confused
3440 # Read the webmin global config file. This contains the OS type and version,
3441 # OS specific configuration and global options such as proxy servers
3442 $config_file = "$config_directory/config";
3444 &read_file_cached($config_file, \%gconfig);
3445 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3446 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3448 # If debugging is enabled, open the debug log
3449 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3450 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3451 if ($gconfig{'debug_size'}) {
3452 my @st = stat($dlog);
3453 if ($st[7] > $gconfig{'debug_size'}) {
3454 rename($dlog, $dlog.".0");
3457 open(main::DEBUGLOG, ">>$dlog");
3458 $main::opened_debug_log = 1;
3460 if ($gconfig{'debug_what_start'}) {
3461 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3462 $main::debug_log_start_time = time();
3463 &webmin_debug_log("START", "script=$script_name");
3464 $main::debug_log_start_module = $module_name;
3468 # Set PATH and LD_LIBRARY_PATH
3469 if ($gconfig{'path'}) {
3470 if ($gconfig{'syspath'}) {
3472 $ENV{'PATH'} = $gconfig{'path'};
3476 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3479 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3481 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3482 if ($gconfig{'http_proxy'}) {
3483 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3485 if ($gconfig{'ftp_proxy'}) {
3486 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3488 if ($gconfig{'noproxy'}) {
3489 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3492 # Find all root directories
3494 if (&get_miniserv_config(\%miniserv)) {
3495 @root_directories = ( $miniserv{'root'} );
3496 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3497 push(@root_directories, $miniserv{"extraroot_$i"});
3501 # Work out which module we are in, and read the per-module config file
3502 $0 =~ s/\\/\//g; # Force consistent path on Windows
3503 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3504 # In a foreign call - use the module name given
3505 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3506 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3507 @root_directories = ( $root_directory ) if (!@root_directories);
3509 elsif ($ENV{'SCRIPT_NAME'}) {
3510 my $sn = $ENV{'SCRIPT_NAME'};
3511 $sn =~ s/^$gconfig{'webprefix'}//
3512 if (!$gconfig{'webprefixnoredir'});
3513 if ($sn =~ /^\/([^\/]+)\//) {
3514 # Get module name from CGI path
3517 if ($ENV{'SERVER_ROOT'}) {
3518 $root_directory = $ENV{'SERVER_ROOT'};
3520 elsif ($ENV{'SCRIPT_FILENAME'}) {
3521 $root_directory = $ENV{'SCRIPT_FILENAME'};
3522 $root_directory =~ s/$sn$//;
3524 @root_directories = ( $root_directory ) if (!@root_directories);
3527 # Get root directory from miniserv.conf, and deduce module name from $0
3528 $root_directory = $root_directories[0];
3530 foreach my $r (@root_directories) {
3531 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3532 # Under a module directory
3537 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3543 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3546 # Work out of this is a web, command line or cron job
3547 if (!$main::webmin_script_type) {
3548 if ($ENV{'SCRIPT_NAME'}) {
3550 $main::webmin_script_type = 'web';
3553 # Cron jobs have no TTY
3554 if ($gconfig{'os_type'} eq 'windows' ||
3555 open(DEVTTY, ">/dev/tty")) {
3556 $main::webmin_script_type = 'cmd';
3560 $main::webmin_script_type = 'cron';
3565 # Set the umask based on config
3566 if ($gconfig{'umask'} && !$main::umask_already++) {
3567 umask(oct($gconfig{'umask'}));
3570 # If this is a cron job or other background task, set the nice level
3571 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3573 if ($gconfig{'nice'}) {
3574 eval 'POSIX::nice($gconfig{\'nice\'});';
3577 # Set IO scheduling class and priority
3578 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3580 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3581 if ($gconfig{'sclass'} ne '');
3582 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3583 if ($gconfig{'sprio'} ne '');
3585 &execute_command("$cmd >/dev/null 2>&1");
3588 $main::nice_already++;
3591 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3592 $base_remote_user = $u;
3593 $remote_user = $ENV{'REMOTE_USER'};
3596 # Find and load the configuration file for this module
3597 my (@ruinfo, $rgroup);
3598 $module_config_directory = "$config_directory/$module_name";
3599 if (&get_product_name() eq "usermin" &&
3600 -r "$module_config_directory/config.$remote_user") {
3602 $module_config_file = "$module_config_directory/config.$remote_user";
3604 elsif (&get_product_name() eq "usermin" &&
3605 (@ruinfo = getpwnam($remote_user)) &&
3606 ($rgroup = getgrgid($ruinfo[3])) &&
3607 -r "$module_config_directory/config.\@$rgroup") {
3608 # Based on group name
3609 $module_config_file = "$module_config_directory/config.\@$rgroup";
3613 $module_config_file = "$module_config_directory/config";
3616 &read_file_cached($module_config_file, \%config);
3618 # Fix up windows-specific substitutions in values
3619 foreach my $k (keys %config) {
3620 if ($config{$k} =~ /\$\{systemroot\}/) {
3621 my $root = &get_windows_root();
3622 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3627 # Record the initial module
3628 $main::initial_module_name ||= $module_name;
3630 # Set some useful variables
3632 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3633 $gconfig{'mobile_theme'} :
3634 defined($gconfig{'theme_'.$remote_user}) ?
3635 $gconfig{'theme_'.$remote_user} :
3636 defined($gconfig{'theme_'.$base_remote_user}) ?
3637 $gconfig{'theme_'.$base_remote_user} :
3639 @current_themes = split(/\s+/, $current_themes);
3640 $current_theme = $current_themes[0];
3641 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3642 $theme_root_directory = $theme_root_directories[0];
3643 @theme_configs = ( );
3644 foreach my $troot (@theme_root_directories) {
3646 &read_file_cached("$troot/config", \%onetconfig);
3647 &read_file_cached("$troot/config", \%tconfig);
3648 push(@theme_configs, \%onetconfig);
3650 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3651 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3653 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3654 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3656 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3657 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3658 if ($tconfig{'preload_functions'}) {
3659 # Force load of theme functions right now, if requested
3660 &load_theme_library();
3662 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3663 # Load the theme's Webmin:: package classes
3664 do "$theme_root_directory/$tconfig{'oofunctions'}";
3669 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3670 : "$var_directory/webmin.log";
3672 # Load language strings into %text
3673 my @langs = &list_languages();
3675 if ($gconfig{'acceptlang'}) {
3676 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3677 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3679 $accepted_lang = $al->{'lang'};
3684 $current_lang = $force_lang ? $force_lang :
3685 $accepted_lang ? $accepted_lang :
3686 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3687 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3688 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3689 foreach my $l (@langs) {
3690 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3692 @lang_order_list = &unique($default_lang,
3693 split(/:/, $current_lang_info->{'fallback'}),
3695 %text = &load_language($module_name);
3696 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3698 # Get the %module_info for this module
3700 my ($mi) = grep { $_->{'dir'} eq $module_name }
3701 &get_all_module_infos(2);
3702 %module_info = %$mi;
3703 $module_root_directory = &module_root_directory($module_name);
3706 if ($module_name && !$main::no_acl_check &&
3707 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3708 # Check if the HTTP user can access this module
3709 if (!&foreign_available($module_name)) {
3710 if (!&foreign_check($module_name)) {
3711 &error(&text('emodulecheck',
3712 "<i>$module_info{'desc'}</i>"));
3715 &error(&text('emodule', "<i>$u</i>",
3716 "<i>$module_info{'desc'}</i>"));
3719 $main::no_acl_check++;
3722 # Check the Referer: header for nasty redirects
3723 my @referers = split(/\s+/, $gconfig{'referers'});
3725 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
3728 my $http_host = $ENV{'HTTP_HOST'};
3729 $http_host =~ s/:\d+$//;
3731 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index_cgi) &&
3732 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
3733 $unsafe_index_cgi) &&
3734 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
3735 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
3736 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
3737 ($referer_site && $referer_site ne $http_host &&
3738 &indexof($referer_site, @referers) < 0 ||
3739 !$referer_site && $gconfig{'referers_none'}) &&
3740 !$trust_unknown_referers &&
3741 !&get_module_variable('$trust_unknown_referers')) {
3742 # Looks like a link from elsewhere .. show an error
3743 &header($text{'referer_title'}, "", undef, 0, 1, 1);
3745 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
3746 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
3747 if ($referer_site) {
3749 print &text('referer_warn',
3750 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
3752 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
3753 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
3756 # No referer info given
3757 print &text('referer_warn_unknown', $url),"<p>\n";
3758 print &text('referer_fix1u'),"<p>\n";
3759 print &text('referer_fix2u'),"<p>\n";
3763 &footer("/", $text{'index'});
3766 $main::no_referers_check++;
3767 $main::completed_referers_check++;
3769 # Call theme post-init
3770 if (defined(&theme_post_init_config)) {
3771 &theme_post_init_config(@_);
3774 # Record that we have done the calling library in this package
3775 my ($callpkg, $lib) = caller();
3777 $main::done_foreign_require{$callpkg,$lib} = 1;
3779 # If a licence checking is enabled, do it now
3780 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
3781 &foreign_check($gconfig{'licence_module'}) &&
3782 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
3783 my $oldpwd = &get_current_dir();
3784 $main::done_licence_module_check++;
3785 $main::licence_module = $gconfig{'licence_module'};
3786 &foreign_require($main::licence_module, "licence_check.pl");
3787 ($main::licence_status, $main::licence_message) =
3788 &foreign_call($main::licence_module, "check_licence");
3792 # Export global variables to caller
3793 if ($main::export_to_caller) {
3794 foreach my $v ('$config_file', '%gconfig', '$null_file',
3795 '$path_separator', '@root_directories',
3796 '$root_directory', '$module_name',
3797 '$base_remote_user', '$remote_user',
3798 '$module_config_directory', '$module_config_file',
3799 '%config', '@current_themes', '$current_theme',
3800 '@theme_root_directories', '$theme_root_directory',
3801 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
3802 '$webmin_logfile', '$current_lang',
3803 '$current_lang_info', '@lang_order_list', '%text',
3804 '%module_info', '$module_root_directory') {
3805 my ($vt, $vn) = split('', $v, 2);
3806 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
3813 =head2 load_language([module], [directory])
3815 Returns a hashtable mapping text codes to strings in the appropriate language,
3816 based on the $current_lang global variable, which is in turn set based on
3817 the Webmin user's selection. The optional module parameter tells the function
3818 which module to load strings for, and defaults to the calling module. The
3819 optional directory parameter can be used to load strings from a directory
3822 In regular module development you will never need to call this function
3823 directly, as init_config calls it for you, and places the module's strings
3824 into the %text hash.
3830 my $root = $root_directory;
3831 my $ol = $gconfig{'overlang'};
3832 my ($dir) = ($_[1] || "lang");
3834 # Read global lang files
3835 foreach my $o (@lang_order_list) {
3836 my $ok = &read_file_cached("$root/$dir/$o", \%text);
3837 return () if (!$ok && $o eq $default_lang);
3840 foreach my $o (@lang_order_list) {
3841 &read_file_cached("$root/$ol/$o", \%text);
3844 &read_file_cached("$config_directory/custom-lang", \%text);
3847 # Read module's lang files
3848 my $mdir = &module_root_directory($_[0]);
3849 foreach my $o (@lang_order_list) {
3850 &read_file_cached("$mdir/$dir/$o", \%text);
3853 foreach $o (@lang_order_list) {
3854 &read_file_cached("$mdir/$ol/$o", \%text);
3857 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
3859 foreach $k (keys %text) {
3860 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
3863 if (defined(&theme_load_language)) {
3864 &theme_load_language(\%text, $_[0]);
3869 =head2 text_subs(string)
3871 Used internally by load_language to expand $code substitutions in language
3877 if (substr($_[0], 0, 8) eq "include:") {
3880 open(INCLUDE, substr($_[0], 8));
3888 my $t = $_[1]->{$_[0]};
3889 return defined($t) ? $t : '$'.$_[0];
3893 =head2 text(message, [substitute]+)
3895 Returns a translated message from %text, but with $1, $2, etc.. replaced with
3896 the substitute parameters. This makes it easy to use strings with placeholders
3897 that get replaced with programmatically generated text. For example :
3899 print &text('index_hello', $remote_user),"<p>\n";
3904 my $t = &get_module_variable('%text', 1);
3905 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
3906 for(my $i=1; $i<@_; $i++) {
3907 $rv =~ s/\$$i/$_[$i]/g;
3912 =head2 encode_base64(string)
3914 Encodes a string into base64 format, for use in MIME email or HTTP
3915 authorization headers.
3921 pos($_[0]) = 0; # ensure start at the beginning
3922 while ($_[0] =~ /(.{1,57})/gs) {
3923 $res .= substr(pack('u57', $1), 1)."\n";
3926 $res =~ tr|\` -_|AA-Za-z0-9+/|;
3927 my $padding = (3 - length($_[0]) % 3) % 3;
3928 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
3932 =head2 decode_base64(string)
3934 Converts a base64-encoded string into plain text. The opposite of encode_base64.
3941 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
3942 if (length($str) % 4) {
3945 $str =~ s/=+$//; # remove padding
3946 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
3947 while ($str =~ /(.{1,60})/gs) {
3948 my $len = chr(32 + length($1)*3/4); # compute length byte
3949 $res .= unpack("u", $len . $1 ); # uudecode
3954 =head2 get_module_info(module, [noclone], [forcache])
3956 Returns a hash containg details of the given module. Some useful keys are :
3958 =item dir - The module directory, like sendmail.
3960 =item desc - Human-readable description, in the current users' language.
3962 =item version - Optional module version number.
3964 =item os_support - List of supported operating systems and versions.
3966 =item category - Category on Webmin's left menu, like net.
3971 return () if ($_[0] =~ /^\./);
3972 my (%rv, $clone, $o);
3973 my $mdir = &module_root_directory($_[0]);
3974 &read_file_cached("$mdir/module.info", \%rv) || return ();
3976 foreach $o (@lang_order_list) {
3977 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
3978 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
3980 if ($clone && !$_[1] && $config_directory) {
3981 $rv{'clone'} = $rv{'desc'};
3982 &read_file("$config_directory/$_[0]/clone", \%rv);
3985 my %module_categories;
3986 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
3987 my $pn = &get_product_name();
3988 if (defined($rv{'category_'.$pn})) {
3989 # Can override category for webmin/usermin
3990 $rv{'category'} = $rv{'category_'.$pn};
3992 $rv{'realcategory'} = $rv{'category'};
3993 $rv{'category'} = $module_categories{$_[0]}
3994 if (defined($module_categories{$_[0]}));
3996 # Apply description overrides
3997 $rv{'realdesc'} = $rv{'desc'};
3999 &read_file_cached("$config_directory/webmin.descs", \%descs);
4000 if ($descs{$_[0]." ".$current_lang}) {
4001 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4003 elsif ($descs{$_[0]}) {
4004 $rv{'desc'} = $descs{$_[0]};
4008 # Apply per-user description overridde
4009 my %gaccess = &get_module_acl(undef, "");
4010 if ($gaccess{'desc_'.$_[0]}) {
4011 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4015 if ($rv{'longdesc'}) {
4016 # All standard modules have an index.cgi
4017 $rv{'index_link'} = 'index.cgi';
4020 # Call theme-specific override function
4021 if (defined(&theme_get_module_info)) {
4022 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4028 =head2 get_all_module_infos(cachemode)
4030 Returns a list contains the information on all modules in this webmin
4031 install, including clones. Uses caching to reduce the number of module.info
4032 files that need to be read. Each element of the array is a hash reference
4033 in the same format as returned by get_module_info. The cache mode flag can be :
4034 0 = read and write, 1 = don't read or write, 2 = read only
4037 sub get_all_module_infos
4041 # Is the cache out of date? (ie. have any of the root's changed?)
4042 my $cache_file = "$config_directory/module.infos.cache";
4044 if (&read_file_cached($cache_file, \%cache)) {
4045 foreach my $r (@root_directories) {
4047 if ($st[9] != $cache{'mtime_'.$r}) {
4057 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4058 # Can use existing module.info cache
4060 foreach my $k (keys %cache) {
4061 if ($k =~ /^(\S+) (\S+)$/) {
4062 $mods{$1}->{$2} = $cache{$k};
4065 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4068 # Need to rebuild cache
4070 foreach my $r (@root_directories) {
4072 foreach my $m (readdir(DIR)) {
4073 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4074 my %minfo = &get_module_info($m, 0, 1);
4075 next if (!%minfo || !$minfo{'dir'});
4077 foreach $k (keys %minfo) {
4078 $cache{"${m} ${k}"} = $minfo{$k};
4083 $cache{'mtime_'.$r} = $st[9];
4085 $cache{'lang'} = $current_lang;
4086 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4089 # Override descriptions for modules for current user
4090 my %gaccess = &get_module_acl(undef, "");
4091 foreach my $m (@rv) {
4092 if ($gaccess{"desc_".$m->{'dir'}}) {
4093 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4097 # Apply installed flags
4099 &read_file_cached("$config_directory/installed.cache", \%installed);
4100 foreach my $m (@rv) {
4101 $m->{'installed'} = $installed{$m->{'dir'}};
4107 =head2 get_theme_info(theme)
4109 Returns a hash containing a theme's details, taken from it's theme.info file.
4110 Some useful keys are :
4112 =item dir - The theme directory, like blue-theme.
4114 =item desc - Human-readable description, in the current users' language.
4116 =item version - Optional module version number.
4118 =item os_support - List of supported operating systems and versions.
4123 return () if ($_[0] =~ /^\./);
4125 my $tdir = &module_root_directory($_[0]);
4126 &read_file("$tdir/theme.info", \%rv) || return ();
4127 foreach my $o (@lang_order_list) {
4128 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4134 =head2 list_languages
4136 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4137 Each is a hash reference with the following keys :
4139 =item lang - The short language code, like es for Spanish.
4141 =item desc - A human-readable description, in English.
4143 =item charset - An optional character set to use when displaying the language.
4145 =item titles - Set to 1 only if Webmin has title images for the language.
4147 =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.
4152 if (!@main::list_languages_cache) {
4155 open(LANG, "$root_directory/lang_list.txt");
4157 if (/^(\S+)\s+(.*)/) {
4158 my $l = { 'desc' => $2 };
4159 foreach $o (split(/,/, $1)) {
4160 if ($o =~ /^([^=]+)=(.*)$/) {
4164 $l->{'index'} = scalar(@rv);
4165 push(@main::list_languages_cache, $l);
4169 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4170 @main::list_languages_cache;
4172 return @main::list_languages_cache;
4175 =head2 read_env_file(file, &hash)
4177 Similar to Webmin's read_file function, but handles files containing shell
4178 environment variables formatted like :
4183 The file parameter is the full path to the file to read, and hash a Perl hash
4184 ref to read names and values into.
4190 &open_readfile(FILE, $_[0]) || return 0;
4193 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4194 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4195 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4203 =head2 write_env_file(file, &hash, [export])
4205 Writes out a hash to a file in name='value' format, suitable for use in a shell
4206 script. The parameters are :
4208 =item file - Full path for a file to write to
4210 =item hash - Hash reference of names and values to write.
4212 =item export - If set to 1, preceed each variable setting with the word 'export'.
4217 my $exp = $_[2] ? "export " : "";
4218 &open_tempfile(FILE, ">$_[0]");
4219 foreach my $k (keys %{$_[1]}) {
4220 my $v = $_[1]->{$k};
4221 if ($v =~ /^\S+$/) {
4222 &print_tempfile(FILE, "$exp$k=$v\n");
4225 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4228 &close_tempfile(FILE);
4231 =head2 lock_file(filename, [readonly], [forcefile])
4233 Lock a file for exclusive access. If the file is already locked, spin
4234 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4235 to work OK. The parameters are :
4237 =item filename - File or directory to lock.
4239 =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.
4241 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4246 my $realfile = &translate_filename($_[0]);
4247 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4248 my $no_lock = !&can_lock_file($realfile);
4249 my $lock_tries_count = 0;
4252 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4257 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4260 # Create the .lock file
4261 open(LOCKING, ">$realfile.lock") || return 0;
4262 my $lck = eval "flock(LOCKING, 2+4)";
4264 # Lock of lock file failed! Wait till later
4267 print LOCKING $$,"\n";
4268 eval "flock(LOCKING, 8)";
4271 $main::locked_file_list{$realfile} = int($_[1]);
4272 push(@main::temporary_files, "$realfile.lock");
4273 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4274 !&get_module_variable('$no_log_file_changes') &&
4276 # Grab a copy of this file for later diffing
4278 $main::locked_file_data{$realfile} = undef;
4280 $main::locked_file_type{$realfile} = 1;
4281 $main::locked_file_data{$realfile} = '';
4283 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4284 $main::locked_file_type{$realfile} = 2;
4285 $main::locked_file_data{$realfile} = $lnk;
4287 elsif (open(ORIGFILE, $realfile)) {
4288 $main::locked_file_type{$realfile} = 0;
4289 $main::locked_file_data{$realfile} = '';
4292 $main::locked_file_data{$realfile} .=$_;
4301 if ($lock_tries_count++ > 5*60) {
4302 # Give up after 5 minutes
4303 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4309 =head2 unlock_file(filename)
4311 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4312 file changes is enabled, then at unlock file a diff will be taken between the
4313 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4314 called. This can then be viewed in the Webmin Actions Log module.
4319 my $realfile = &translate_filename($_[0]);
4320 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4321 unlink("$realfile.lock") if (&can_lock_file($realfile));
4322 delete($main::locked_file_list{$realfile});
4323 if (exists($main::locked_file_data{$realfile})) {
4324 # Diff the new file with the old
4326 my $lnk = readlink($realfile);
4327 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4328 my $oldtype = $main::locked_file_type{$realfile};
4329 my $new = !defined($main::locked_file_data{$realfile});
4330 if ($new && !-e _) {
4331 # file doesn't exist, and never did! do nothing ..
4333 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4334 # is (or was) a directory ..
4335 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4336 push(@main::locked_file_diff,
4337 { 'type' => 'mkdir', 'object' => $realfile });
4339 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4340 push(@main::locked_file_diff,
4341 { 'type' => 'rmdir', 'object' => $realfile });
4344 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4345 # is (or was) a symlink ..
4346 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4347 push(@main::locked_file_diff,
4348 { 'type' => 'symlink', 'object' => $realfile,
4351 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4352 push(@main::locked_file_diff,
4353 { 'type' => 'unsymlink', 'object' => $realfile,
4354 'data' => $main::locked_file_data{$realfile} });
4356 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4357 push(@main::locked_file_diff,
4358 { 'type' => 'resymlink', 'object' => $realfile,
4363 # is a file, or has changed type?!
4364 my ($diff, $delete_file);
4365 my $type = "modify";
4367 open(NEWFILE, ">$realfile");
4372 if (!defined($main::locked_file_data{$realfile})) {
4375 open(ORIGFILE, ">$realfile.webminorig");
4376 print ORIGFILE $main::locked_file_data{$realfile};
4378 $diff = &backquote_command(
4379 "diff ".quotemeta("$realfile.webminorig")." ".
4380 quotemeta($realfile)." 2>/dev/null");
4381 push(@main::locked_file_diff,
4382 { 'type' => $type, 'object' => $realfile,
4383 'data' => $diff } ) if ($diff);
4384 unlink("$realfile.webminorig");
4385 unlink($realfile) if ($delete_file);
4388 if ($gconfig{'logfullfiles'}) {
4389 # Add file details to list of those to fully log
4390 $main::orig_file_data{$realfile} ||=
4391 $main::locked_file_data{$realfile};
4392 $main::orig_file_type{$realfile} ||=
4393 $main::locked_file_type{$realfile};
4396 delete($main::locked_file_data{$realfile});
4397 delete($main::locked_file_type{$realfile});
4401 =head2 test_lock(file)
4403 Returns 1 if some file is currently locked, 0 if not.
4408 my $realfile = &translate_filename($_[0]);
4409 return 0 if (!$_[0]);
4410 return 1 if (defined($main::locked_file_list{$realfile}));
4411 return 0 if (!&can_lock_file($realfile));
4413 if (open(LOCKING, "$realfile.lock")) {
4418 return $pid && kill(0, $pid);
4421 =head2 unlock_all_files
4423 Unlocks all files locked by the current script.
4426 sub unlock_all_files
4428 foreach $f (keys %main::locked_file_list) {
4433 =head2 can_lock_file(file)
4435 Returns 1 if some file should be locked, based on the settings in the
4436 Webmin Configuration module. For internal use by lock_file only.
4441 if (&is_readonly_mode()) {
4442 return 0; # never lock in read-only mode
4444 elsif ($gconfig{'lockmode'} == 0) {
4447 elsif ($gconfig{'lockmode'} == 1) {
4451 # Check if under any of the directories
4453 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4454 if (&same_file($d, $_[0]) ||
4455 &is_under_directory($d, $_[0])) {
4459 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4463 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4465 Log some action taken by a user. This is typically called at the end of a
4466 script, once all file changes are complete and all commands run. The
4469 =item action - A short code for the action being performed, like 'create'.
4471 =item type - A code for the type of object the action is performed to, like 'user'.
4473 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4475 =item params - A hash ref of additional information about the action.
4477 =item module - Name of the module in which the action was performed, which defaults to the current module.
4479 =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.
4481 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4483 =item client-ip - IP address of the browser that performed the action.
4488 return if (!$gconfig{'log'} || &is_readonly_mode());
4489 my $m = $_[4] ? $_[4] : &get_module_name();
4491 if ($gconfig{'logclear'}) {
4492 # check if it is time to clear the log
4493 my @st = stat("$webmin_logfile.time");
4494 my $write_logtime = 0;
4496 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4497 # clear logfile and all diff files
4498 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4499 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4500 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4501 unlink($webmin_logfile);
4508 if ($write_logtime) {
4509 open(LOGTIME, ">$webmin_logfile.time");
4510 print LOGTIME time(),"\n";
4515 # If an action script directory is defined, call the appropriate scripts
4516 if ($gconfig{'action_script_dir'}) {
4517 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4518 my ($basedir) = $gconfig{'action_script_dir'};
4520 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4523 opendir(DIR, $dir) or die "Can't open $dir: $!";
4524 while (defined($file = readdir(DIR))) {
4525 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4526 if (-x "$dir/$file") {
4527 # Call a script notifying it of the action
4529 $ENV{'ACTION_MODULE'} = &get_module_name();
4530 $ENV{'ACTION_ACTION'} = $_[0];
4531 $ENV{'ACTION_TYPE'} = $_[1];
4532 $ENV{'ACTION_OBJECT'} = $_[2];
4533 $ENV{'ACTION_SCRIPT'} = $script_name;
4534 foreach my $p (keys %param) {
4535 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4537 system("$dir/$file", @_,
4538 "<$null_file", ">$null_file", "2>&1");
4546 # should logging be done at all?
4547 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4548 split(/\s+/, $gconfig{'logusers'})) < 0);
4549 return if ($gconfig{'logmodules'} && &indexof($m,
4550 split(/\s+/, $gconfig{'logmodules'})) < 0);
4554 my @tm = localtime($now);
4555 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4556 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4557 $main::action_id_count++;
4558 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4559 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4560 $tm[2], $tm[1], $tm[0],
4561 $remote_user || '-',
4562 $main::session_id || '-',
4563 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4564 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4565 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4567 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4568 my $v = $_[3]->{$k};
4574 elsif (ref($v) eq 'ARRAY') {
4578 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4579 $line .= " $k='$vv'";
4583 foreach $vv (split(/\0/, $v)) {
4585 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4586 $line .= " $k='$vv'";
4589 $param{$k} = join(" ", @pv);
4591 open(WEBMINLOG, ">>$webmin_logfile");
4592 print WEBMINLOG $line,"\n";
4594 if ($gconfig{'logperms'}) {
4595 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4598 chmod(0600, $webmin_logfile);
4601 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4602 # Find and record the changes made to any locked files, or commands run
4604 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4605 foreach my $d (@main::locked_file_diff) {
4606 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4607 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4608 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4609 print DIFFLOG $d->{'data'};
4611 if ($d->{'input'}) {
4612 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4613 print DIFFLOG $d->{'input'};
4616 if ($gconfig{'logperms'}) {
4617 chmod(oct($gconfig{'logperms'}),
4618 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4619 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4623 @main::locked_file_diff = undef;
4625 if ($gconfig{'logfullfiles'}) {
4626 # Save the original contents of any modified files
4628 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4629 foreach my $f (keys %main::orig_file_data) {
4630 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4631 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4632 if (!defined($main::orig_file_type{$f})) {
4633 print ORIGLOG -1," ",$f,"\n";
4636 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4638 print ORIGLOG $main::orig_file_data{$f};
4640 if ($gconfig{'logperms'}) {
4641 chmod(oct($gconfig{'logperms'}),
4642 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4646 %main::orig_file_data = undef;
4647 %main::orig_file_type = undef;
4651 if ($gconfig{'logsyslog'}) {
4652 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4653 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4654 setlogsock("inet");';
4656 # Syslog module is installed .. try to convert to a
4657 # human-readable form
4659 my $mod = &get_module_name();
4660 my $mdir = module_root_directory($mod);
4661 if (-r "$mdir/log_parser.pl") {
4662 &foreign_require($mod, "log_parser.pl");
4664 foreach my $k (keys %{$_[3]}) {
4665 my $v = $_[3]->{$k};
4666 if (ref($v) eq 'ARRAY') {
4667 $params{$k} = join("\0", @$v);
4673 $msg = &foreign_call($mod, "parse_webmin_log",
4674 $remote_user, $script_name,
4675 $_[0], $_[1], $_[2], \%params);
4676 $msg =~ s/<[^>]*>//g; # Remove tags
4678 elsif ($_[0] eq "_config_") {
4679 my %wtext = &load_language("webminlog");
4680 $msg = $wtext{'search_config'};
4682 $msg ||= "$_[0] $_[1] $_[2]";
4683 my %info = &get_module_info($m);
4684 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4689 =head2 additional_log(type, object, data, [input])
4691 Records additional log data for an upcoming call to webmin_log, such
4692 as a command that was run or SQL that was executed. Typically you will never
4693 need to call this function directory.
4698 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4699 push(@main::locked_file_diff,
4700 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4701 'input' => $_[3] } );
4705 =head2 webmin_debug_log(type, message)
4707 Write something to the Webmin debug log. For internal use only.
4710 sub webmin_debug_log
4712 my ($type, $msg) = @_;
4713 return 0 if (!$main::opened_debug_log);
4714 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
4716 my @tm = localtime($now);
4718 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
4719 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4720 $tm[2], $tm[1], $tm[0],
4721 $remote_user || "-",
4722 $ENV{'REMOTE_HOST'} || "-",
4723 &get_module_name() || "-",
4726 seek(main::DEBUGLOG, 0, 2);
4727 print main::DEBUGLOG $line."\n";
4731 =head2 system_logged(command)
4733 Just calls the Perl system() function, but also logs the command run.
4738 if (&is_readonly_mode()) {
4739 print STDERR "Vetoing command $_[0]\n";
4742 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
4743 my $cmd = join(" ", @realcmd);
4745 if ($cmd =~ s/(\s*&\s*)$//) {
4748 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
4749 $cmd =~ s/^\((.*)\)\s*$/$1/;
4751 &additional_log('exec', undef, $cmd);
4752 return system(@realcmd);
4755 =head2 backquote_logged(command)
4757 Executes a command and returns the output (like `command`), but also logs it.
4760 sub backquote_logged
4762 if (&is_readonly_mode()) {
4764 print STDERR "Vetoing command $_[0]\n";
4767 my $realcmd = &translate_command($_[0]);
4770 if ($cmd =~ s/(\s*&\s*)$//) {
4773 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
4774 $cmd =~ s/^\((.*)\)\s*$/$1/;
4776 &additional_log('exec', undef, $cmd);
4777 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
4781 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
4783 Runs some command, waiting at most the given number of seconds for it to
4784 complete, and returns the output. The maxlines parameter sets the number
4785 of lines of output to capture. The safe parameter should be set to 1 if the
4786 command is safe for read-only mode users to run.
4789 sub backquote_with_timeout
4791 my $realcmd = &translate_command($_[0]);
4792 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
4793 if ($gconfig{'debug_what_cmd'});
4795 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
4800 my $elapsed = time() - $start;
4801 last if ($elapsed > $_[1]);
4803 vec($rmask, fileno(OUT), 1) = 1;
4804 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
4805 last if (!$sel || $sel < 0);
4807 last if (!defined($line));
4810 if ($_[3] && $linecount >= $_[3]) {
4815 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
4819 return wantarray ? ($out, $timed_out) : $out;
4822 =head2 backquote_command(command, safe?)
4824 Executes a command and returns the output (like `command`), subject to
4825 command translation. The safe parameter should be set to 1 if the command
4826 is safe for read-only mode users to run.
4829 sub backquote_command
4831 if (&is_readonly_mode() && !$_[1]) {
4832 print STDERR "Vetoing command $_[0]\n";
4836 my $realcmd = &translate_command($_[0]);
4837 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
4841 =head2 kill_logged(signal, pid, ...)
4843 Like Perl's built-in kill function, but also logs the fact that some process
4844 was killed. On Windows, falls back to calling process.exe to terminate a
4850 return scalar(@_)-1 if (&is_readonly_mode());
4851 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
4852 if ($gconfig{'debug_what_procs'});
4853 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
4854 if ($gconfig{'os_type'} eq 'windows') {
4855 # Emulate some kills with process.exe
4856 my $arg = $_[0] eq "KILL" ? "-k" :
4857 $_[0] eq "TERM" ? "-q" :
4858 $_[0] eq "STOP" ? "-s" :
4859 $_[0] eq "CONT" ? "-r" : undef;
4861 foreach my $p (@_[1..@_-1]) {
4863 $ok ||= kill($_[0], $p);
4866 &execute_command("process $arg $p");
4878 =head2 rename_logged(old, new)
4880 Re-names a file and logs the rename. If the old and new files are on different
4881 filesystems, calls mv or the Windows rename function to do the job.
4886 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
4887 return &rename_file($_[0], $_[1]);
4890 =head2 rename_file(old, new)
4892 Renames a file or directory. If the old and new files are on different
4893 filesystems, calls mv or the Windows rename function to do the job.
4898 if (&is_readonly_mode()) {
4899 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
4902 my $src = &translate_filename($_[0]);
4903 my $dst = &translate_filename($_[1]);
4904 &webmin_debug_log('RENAME', "src=$src dst=$dst")
4905 if ($gconfig{'debug_what_ops'});
4906 my $ok = rename($src, $dst);
4907 if (!$ok && $! !~ /permission/i) {
4908 # Try the mv command, in case this is a cross-filesystem rename
4909 if ($gconfig{'os_type'} eq 'windows') {
4910 # Need to use rename
4911 my $out = &backquote_command("rename ".quotemeta($_[0]).
4912 " ".quotemeta($_[1])." 2>&1");
4914 $! = $out if (!$ok);
4918 my $out = &backquote_command("mv ".quotemeta($_[0]).
4919 " ".quotemeta($_[1])." 2>&1");
4921 $! = $out if (!$ok);
4927 =head2 symlink_logged(src, dest)
4929 Create a symlink, and logs it. Effectively does the same thing as the Perl
4936 my $rv = &symlink_file($_[0], $_[1]);
4937 &unlock_file($_[1]);
4941 =head2 symlink_file(src, dest)
4943 Creates a soft link, unless in read-only mode. Effectively does the same thing
4944 as the Perl symlink function.
4949 if (&is_readonly_mode()) {
4950 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
4953 my $src = &translate_filename($_[0]);
4954 my $dst = &translate_filename($_[1]);
4955 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
4956 if ($gconfig{'debug_what_ops'});
4957 return symlink($src, $dst);
4960 =head2 link_file(src, dest)
4962 Creates a hard link, unless in read-only mode. The existing new link file
4963 will be deleted if necessary. Effectively the same as Perl's link function.
4968 if (&is_readonly_mode()) {
4969 print STDERR "Vetoing link from $_[0] to $_[1]\n";
4972 my $src = &translate_filename($_[0]);
4973 my $dst = &translate_filename($_[1]);
4974 &webmin_debug_log('LINK', "src=$src dst=$dst")
4975 if ($gconfig{'debug_what_ops'});
4976 unlink($dst); # make sure link works
4977 return link($src, $dst);
4980 =head2 make_dir(dir, perms, recursive)
4982 Creates a directory and sets permissions on it, unless in read-only mode.
4983 The perms parameter sets the octal permissions to apply, which unlike Perl's
4984 mkdir will really get set. The recursive flag can be set to 1 to have the
4985 function create parent directories too.
4990 my ($dir, $perms, $recur) = @_;
4991 if (&is_readonly_mode()) {
4992 print STDERR "Vetoing directory $dir\n";
4995 $dir = &translate_filename($dir);
4996 my $exists = -d $dir ? 1 : 0;
4997 return 1 if ($exists && $recur); # already exists
4998 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
4999 my $rv = mkdir($dir, $perms);
5000 if (!$rv && $recur) {
5001 # Failed .. try mkdir -p
5002 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5003 my $ex = &execute_command("mkdir $param "."e_path($dir));
5009 chmod($perms, $dir);
5014 =head2 set_ownership_permissions(user, group, perms, file, ...)
5016 Sets the user, group owner and permissions on some files. The parameters are :
5018 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5020 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5022 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5024 =item file - One or more files or directories to modify.
5027 sub set_ownership_permissions
5029 my ($user, $group, $perms, @files) = @_;
5030 if (&is_readonly_mode()) {
5031 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5034 @files = map { &translate_filename($_) } @files;
5035 if ($gconfig{'debug_what_ops'}) {
5036 foreach my $f (@files) {
5037 &webmin_debug_log('PERMS',
5038 "file=$f user=$user group=$group perms=$perms");
5042 if (defined($user)) {
5043 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5045 if (defined($group)) {
5046 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5049 my @uinfo = getpwuid($uid);
5052 $rv = chown($uid, $gid, @files);
5054 if ($rv && defined($perms)) {
5055 $rv = chmod($perms, @files);
5060 =head2 unlink_logged(file, ...)
5062 Like Perl's unlink function, but locks the files beforehand and un-locks them
5063 after so that the deletion is logged by Webmin.
5069 foreach my $f (@_) {
5070 if (!&test_lock($f)) {
5075 my @rv = &unlink_file(@_);
5076 foreach my $f (@_) {
5081 return wantarray ? @rv : $rv[0];
5084 =head2 unlink_file(file, ...)
5086 Deletes some files or directories. Like Perl's unlink function, but also
5087 recursively deletes directories with the rm command if needed.
5092 return 1 if (&is_readonly_mode());
5095 foreach my $f (@_) {
5096 my $realf = &translate_filename($f);
5097 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5099 if (!rmdir($realf)) {
5100 if ($gconfig{'os_type'} eq 'windows') {
5101 # Call del and rmdir commands
5104 my $out = `del /q "$qm" 2>&1`;
5106 $out = `rmdir "$qm" 2>&1`;
5111 my $qm = quotemeta($realf);
5112 my $out = `rm -rf $qm 2>&1`;
5121 if (!unlink($realf)) {
5127 return wantarray ? ($rv, $err) : $rv;
5130 =head2 copy_source_dest(source, dest)
5132 Copy some file or directory to a new location. Returns 1 on success, or 0
5133 on failure - also sets $! on failure. If the source is a directory, uses
5134 piped tar commands to copy a whole directory structure including permissions
5138 sub copy_source_dest
5140 return (1, undef) if (&is_readonly_mode());
5141 my ($src, $dst) = @_;
5144 &webmin_debug_log('COPY', "src=$src dst=$dst")
5145 if ($gconfig{'debug_what_ops'});
5146 if ($gconfig{'os_type'} eq 'windows') {
5147 # No tar or cp on windows, so need to use copy command
5151 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5154 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5162 # A directory .. need to copy with tar command
5163 my @st = stat($src);
5166 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5167 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5174 # Can just copy with cp
5175 my $out = &backquote_logged("cp -p ".quotemeta($src).
5176 " ".quotemeta($dst)." 2>&1");
5182 return wantarray ? ($ok, $err) : $ok;
5185 =head2 remote_session_name(host|&server)
5187 Generates a session ID for some server. For this server, this will always
5188 be an empty string. For a server object it will include the hostname and
5189 port and PID. For a server name, it will include the hostname and PID. For
5193 sub remote_session_name
5195 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5196 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5197 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5198 ref($_[0]) ? "" : "$_[0].$$";
5201 =head2 remote_foreign_require(server, module, file)
5203 Connects to rpc.cgi on a remote webmin server and have it open a session
5204 to a process that will actually do the require and run functions. This is the
5205 equivalent for foreign_require, but for a remote Webmin system. The server
5206 parameter can either be a hostname of a system registered in the Webmin
5207 Servers Index module, or a hash reference for a system from that module.
5210 sub remote_foreign_require
5212 my $call = { 'action' => 'require',
5215 my $sn = &remote_session_name($_[0]);
5216 if ($remote_session{$sn}) {
5217 $call->{'session'} = $remote_session{$sn};
5220 $call->{'newsession'} = 1;
5222 my $rv = &remote_rpc_call($_[0], $call);
5223 if ($rv->{'session'}) {
5224 $remote_session{$sn} = $rv->{'session'};
5225 $remote_session_server{$sn} = $_[0];
5229 =head2 remote_foreign_call(server, module, function, [arg]*)
5231 Call a function on a remote server. Must have been setup first with
5232 remote_foreign_require for the same server and module. Equivalent to
5233 foreign_call, but with the extra server parameter to specify the remote
5237 sub remote_foreign_call
5239 return undef if (&is_readonly_mode());
5240 my $sn = &remote_session_name($_[0]);
5241 return &remote_rpc_call($_[0], { 'action' => 'call',
5244 'session' => $remote_session{$sn},
5245 'args' => [ @_[3 .. $#_] ] } );
5248 =head2 remote_foreign_check(server, module, [api-only])
5250 Checks if some module is installed and supported on a remote server. Equivilant
5251 to foreign_check, but for the remote Webmin system specified by the server
5255 sub remote_foreign_check
5257 return &remote_rpc_call($_[0], { 'action' => 'check',
5262 =head2 remote_foreign_config(server, module)
5264 Gets the configuration for some module from a remote server, as a hash.
5265 Equivalent to foreign_config, but for a remote system.
5268 sub remote_foreign_config
5270 return &remote_rpc_call($_[0], { 'action' => 'config',
5271 'module' => $_[1] });
5274 =head2 remote_eval(server, module, code)
5276 Evaluates some perl code in the context of a module on a remote webmin server.
5277 The server parameter must be the hostname of a remote system, module must
5278 be a module directory name, and code a string of Perl code to run. This can
5279 only be called after remote_foreign_require for the same server and module.
5284 return undef if (&is_readonly_mode());
5285 my $sn = &remote_session_name($_[0]);
5286 return &remote_rpc_call($_[0], { 'action' => 'eval',
5289 'session' => $remote_session{$sn} });
5292 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5294 Transfers some local file to another server via Webmin's RPC protocol, and
5295 returns the resulting remote filename. If the remotefile parameter is given,
5296 that is the destination filename which will be used. Otherwise a randomly
5297 selected temporary filename will be used, and returned by the function.
5302 return undef if (&is_readonly_mode());
5304 my $sn = &remote_session_name($_[0]);
5305 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5306 # Copy data over TCP connection
5307 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5309 'name' => $_[3] } );
5311 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5312 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5313 return &$main::remote_error_handler("Failed to transfer file : $error")
5316 while(read(FILE, $got, 1024) > 0) {
5320 shutdown(TWRITE, 1);
5322 if ($error && $error !~ /^OK/) {
5323 # Got back an error!
5324 return &$main::remote_error_handler("Failed to transfer file : $error");
5330 # Just pass file contents as parameters
5332 while(read(FILE, $got, 1024) > 0) {
5336 return &remote_rpc_call($_[0], { 'action' => 'write',
5339 'session' => $remote_session{$sn} });
5343 =head2 remote_read(server, localfile, remotefile)
5345 Transfers a file from a remote server to this system, using Webmin's RPC
5346 protocol. The server parameter must be the hostname of a system registered
5347 in the Webmin Servers Index module, localfile is the destination path on this
5348 system, and remotefile is the file to fetch from the remote server.
5353 my $sn = &remote_session_name($_[0]);
5354 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5355 # Copy data over TCP connection
5356 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5357 'file' => $_[2] } );
5359 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5362 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5363 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5364 return &$main::remote_error_handler("Failed to transfer file : $error")
5367 open(FILE, ">$_[1]");
5368 while(read(TREAD, $got, 1024) > 0) {
5375 # Just get data as return value
5376 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5378 'session' => $remote_session{$sn} });
5379 open(FILE, ">$_[1]");
5385 =head2 remote_finished
5387 Close all remote sessions. This happens automatically after a while
5388 anyway, but this function should be called to clean things up faster.
5393 foreach my $sn (keys %remote_session) {
5394 my $server = $remote_session_server{$sn};
5395 &remote_rpc_call($server, { 'action' => 'quit',
5396 'session' => $remote_session{$sn} } );
5397 delete($remote_session{$sn});
5398 delete($remote_session_server{$sn});
5400 foreach $fh (keys %fast_fh_cache) {
5402 delete($fast_fh_cache{$fh});
5406 =head2 remote_error_setup(&function)
5408 Sets a function to be called instead of &error when a remote RPC operation
5409 fails. Useful if you want to have more control over your remote operations.
5412 sub remote_error_setup
5414 $main::remote_error_handler = $_[0] || \&error;
5417 =head2 remote_rpc_call(server, structure)
5419 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5420 and then reads back a reply structure. This is mainly for internal use only,
5421 and is called by the other remote_* functions.
5427 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5429 # Server structure was given
5431 $serv->{'user'} || $serv->{'id'} == 0 ||
5432 return &$main::remote_error_handler(
5433 "No Webmin login set for server");
5436 # lookup the server in the webmin servers module if needed
5437 if (!defined(%main::remote_servers_cache)) {
5438 &foreign_require("servers", "servers-lib.pl");
5439 foreach $s (&foreign_call("servers", "list_servers")) {
5440 $main::remote_servers_cache{$s->{'host'}} = $s;
5441 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5444 $serv = $main::remote_servers_cache{$_[0]};
5445 $serv || return &$main::remote_error_handler(
5446 "No Webmin Servers entry for $_[0]");
5447 $serv->{'user'} || return &$main::remote_error_handler(
5448 "No login set for server $_[0]");
5451 # Work out the username and password
5453 if ($serv->{'sameuser'}) {
5454 $user = $remote_user;
5455 defined($main::remote_pass) || return &$main::remote_error_handler(
5456 "Password for this server is not available");
5457 $pass = $main::remote_pass;
5460 $user = $serv->{'user'};
5461 $pass = $serv->{'pass'};
5464 if ($serv->{'fast'} || !$sn) {
5465 # Make TCP connection call to fastrpc.cgi
5466 if (!$fast_fh_cache{$sn} && $sn) {
5467 # Need to open the connection
5468 my $con = &make_http_connection(
5469 $serv->{'host'}, $serv->{'port'}, $serv->{'ssl'},
5470 "POST", "/fastrpc.cgi");
5471 return &$main::remote_error_handler(
5472 "Failed to connect to $serv->{'host'} : $con")
5474 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5475 &write_http_connection($con, "User-agent: Webmin\r\n");
5476 my $auth = &encode_base64("$user:$pass");
5478 &write_http_connection($con, "Authorization: basic $auth\r\n");
5479 &write_http_connection($con, "Content-length: ",
5480 length($tostr),"\r\n");
5481 &write_http_connection($con, "\r\n");
5482 &write_http_connection($con, $tostr);
5484 # read back the response
5485 my $line = &read_http_connection($con);
5486 $line =~ tr/\r\n//d;
5487 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5488 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5490 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5491 return &$main::remote_error_handler("HTTP error : $line");
5493 $line = &read_http_connection($con);
5494 $line =~ tr/\r\n//d;
5496 $line = &read_http_connection($con);
5497 if ($line =~ /^0\s+(.*)/) {
5498 return &$main::remote_error_handler("RPC error : $1");
5500 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5501 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5502 # Started ok .. connect and save SID
5503 &close_http_connection($con);
5504 my ($port, $sid, $version, $error) = ($1, $2, $3);
5505 &open_socket($serv->{'host'}, $port, $sid, \$error);
5506 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5508 $fast_fh_cache{$sn} = $sid;
5509 $remote_server_version{$sn} = $version;
5512 while($stuff = &read_http_connection($con)) {
5515 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5518 elsif (!$fast_fh_cache{$sn}) {
5519 # Open the connection by running fastrpc.cgi locally
5520 pipe(RPCOUTr, RPCOUTw);
5524 open(STDOUT, ">&RPCOUTw");
5528 $ENV{'REQUEST_METHOD'} = 'GET';
5529 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5530 $ENV{'SERVER_ROOT'} ||= $root_directory;
5532 if ($base_remote_user ne 'root' &&
5533 $base_remote_user ne 'admin') {
5534 # Need to fake up a login for the CGI!
5535 &read_acl(undef, \%acl);
5536 $ENV{'BASE_REMOTE_USER'} =
5537 $ENV{'REMOTE_USER'} =
5538 $acl{'root'} ? 'root' : 'admin';
5540 delete($ENV{'FOREIGN_MODULE_NAME'});
5541 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5542 chdir($root_directory);
5543 if (!exec("$root_directory/fastrpc.cgi")) {
5544 print "exec failed : $!\n";
5551 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5555 if ($line =~ /^0\s+(.*)/) {
5556 return &$main::remote_error_handler("RPC error : $2");
5558 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5559 # Started ok .. connect and save SID
5561 my ($port, $sid, $error) = ($1, $2, undef);
5562 &open_socket("localhost", $port, $sid, \$error);
5563 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5564 $fast_fh_cache{$sn} = $sid;
5571 &error("Bad response from fastrpc.cgi : $line");
5574 # Got a connection .. send off the request
5575 my $fh = $fast_fh_cache{$sn};
5576 my $tostr = &serialise_variable($_[1]);
5577 print $fh length($tostr)," $fh\n";
5579 my $rlen = int(<$fh>);
5580 my ($fromstr, $got);
5581 while(length($fromstr) < $rlen) {
5582 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5583 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5586 my $from = &unserialise_variable($fromstr);
5588 return &$main::remote_error_handler("Remote Webmin error");
5590 if (defined($from->{'arv'})) {
5591 return @{$from->{'arv'}};
5594 return $from->{'rv'};
5598 # Call rpc.cgi on remote server
5599 my $tostr = &serialise_variable($_[1]);
5601 my $con = &make_http_connection($serv->{'host'}, $serv->{'port'},
5602 $serv->{'ssl'}, "POST", "/rpc.cgi");
5603 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5605 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5606 &write_http_connection($con, "User-agent: Webmin\r\n");
5607 my $auth = &encode_base64("$user:$pass");
5609 &write_http_connection($con, "Authorization: basic $auth\r\n");
5610 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5611 &write_http_connection($con, "\r\n");
5612 &write_http_connection($con, $tostr);
5614 # read back the response
5615 my $line = &read_http_connection($con);
5616 $line =~ tr/\r\n//d;
5617 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5618 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5620 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5622 $line = &read_http_connection($con);
5623 $line =~ tr/\r\n//d;
5626 while($line = &read_http_connection($con)) {
5630 my $from = &unserialise_variable($fromstr);
5631 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5632 if (defined($from->{'arv'})) {
5633 return @{$from->{'arv'}};
5636 return $from->{'rv'};
5641 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5643 Executes some function in parallel on multiple servers at once. Fills in
5644 the returns and errors arrays respectively. If the module and library
5645 parameters are given, that module is remotely required on the server first,
5646 to check if it is connectable. The parameters are :
5648 =item servers - A list of Webmin system hash references.
5650 =item parallel - Number of parallel operations to perform.
5652 =item function - Reference to function to call for each system.
5654 =item args - Additional parameters to the function.
5656 =item returns - Array ref to place return values into, in same order as servers.
5658 =item errors - Array ref to place error messages into.
5660 =item module - Optional module to require on the remote system first.
5662 =item library - Optional library to require in the module.
5665 sub remote_multi_callback
5667 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5668 &remote_error_setup(\&remote_multi_callback_error);
5670 # Call the functions
5672 foreach my $g (@$servs) {
5678 $remote_multi_callback_err = undef;
5680 # Require the remote lib
5681 &remote_foreign_require($g->{'host'}, $mod, $lib);
5682 if ($remote_multi_callback_err) {
5683 # Failed .. return error
5684 print $wh &serialise_variable(
5685 [ undef, $remote_multi_callback_err ]);
5691 my $a = ref($args) ? $args->[$p] : $args;
5692 my $rv = &$func($g, $a);
5695 print $wh &serialise_variable(
5696 [ $rv, $remote_multi_callback_err ]);
5704 # Read back the results
5706 foreach my $g (@$servs) {
5710 $errs->[$p] = "Failed to read response from $g->{'host'}";
5713 my $rv = &unserialise_variable($line);
5715 $rets->[$p] = $rv->[0];
5716 $errs->[$p] = $rv->[1];
5721 &remote_error_setup(undef);
5724 sub remote_multi_callback_error
5726 $remote_multi_callback_err = $_[0];
5729 =head2 serialise_variable(variable)
5731 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
5732 into a url-encoded string. In the cases of arrays and hashes, it is recursively
5733 called on each member to serialize the entire object.
5736 sub serialise_variable
5738 if (!defined($_[0])) {
5744 $rv = &urlize($_[0]);
5746 elsif ($r eq 'SCALAR') {
5747 $rv = &urlize(${$_[0]});
5749 elsif ($r eq 'ARRAY') {
5750 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
5752 elsif ($r eq 'HASH') {
5753 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5754 &urlize(&serialise_variable($_[0]->{$_})) }
5757 elsif ($r eq 'REF') {
5758 $rv = &serialise_variable(${$_[0]});
5760 elsif ($r eq 'CODE') {
5765 # An object - treat as a hash
5766 $r = "OBJECT ".&urlize($r);
5767 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
5768 &urlize(&serialise_variable($_[0]->{$_})) }
5771 return ($r ? $r : 'VAL').",".$rv;
5774 =head2 unserialise_variable(string)
5776 Converts a string created by serialise_variable() back into the original
5777 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
5778 object, the same class is used on this system, if available.
5781 sub unserialise_variable
5783 my @v = split(/,/, $_[0]);
5785 if ($v[0] eq 'VAL') {
5786 @v = split(/,/, $_[0], -1);
5787 $rv = &un_urlize($v[1]);
5789 elsif ($v[0] eq 'SCALAR') {
5790 local $r = &un_urlize($v[1]);
5793 elsif ($v[0] eq 'ARRAY') {
5795 for(my $i=1; $i<@v; $i++) {
5796 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
5799 elsif ($v[0] eq 'HASH') {
5801 for(my $i=1; $i<@v; $i+=2) {
5802 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5803 &unserialise_variable(&un_urlize($v[$i+1]));
5806 elsif ($v[0] eq 'REF') {
5807 local $r = &unserialise_variable($v[1]);
5810 elsif ($v[0] eq 'UNDEF') {
5813 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
5814 # An object hash that we have to re-bless
5817 for(my $i=1; $i<@v; $i+=2) {
5818 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
5819 &unserialise_variable(&un_urlize($v[$i+1]));
5827 =head2 other_groups(user)
5829 Returns a list of secondary groups a user is a member of, as a list of
5838 while(my @g = getgrent()) {
5839 my @m = split(/\s+/, $g[3]);
5840 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
5842 endgrent() if ($gconfig{'os_type'} ne 'hpux');
5846 =head2 date_chooser_button(dayfield, monthfield, yearfield)
5848 Returns HTML for a button that pops up a data chooser window. The parameters
5851 =item dayfield - Name of the text field to place the day of the month into.
5853 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
5855 =item yearfield - Name of the text field to place the year into.
5858 sub date_chooser_button
5860 return &theme_date_chooser_button(@_)
5861 if (defined(&theme_date_chooser_button));
5862 my ($w, $h) = (250, 225);
5863 if ($gconfig{'db_sizedate'}) {
5864 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
5866 return "<input type=button onClick='window.dfield = form.$_[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";
5869 =head2 help_file(module, file)
5871 Returns the path to a module's help file of some name, typically under the
5872 help directory with a .html extension.
5877 my $mdir = &module_root_directory($_[0]);
5878 my $dir = "$mdir/help";
5879 foreach my $o (@lang_order_list) {
5880 my $lang = "$dir/$_[1].$current_lang.html";
5881 return $lang if (-r $lang);
5883 return "$dir/$_[1].html";
5888 Seeds the random number generator, if not already done in this script. On Linux
5889 this makes use of the current time, process ID and a read from /dev/urandom.
5890 On other systems, only the current time and process ID are used.
5895 if (!$main::done_seed_random) {
5896 if (open(RANDOM, "/dev/urandom")) {
5898 read(RANDOM, $buf, 4);
5900 srand(time() ^ $$ ^ $buf);
5905 $main::done_seed_random = 1;
5909 =head2 disk_usage_kb(directory)
5911 Returns the number of kB used by some directory and all subdirs. Implemented
5912 by calling the C<du -k> command.
5917 my $dir = &translate_filename($_[0]);
5919 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
5921 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
5923 return $out =~ /^([0-9]+)/ ? $1 : "???";
5926 =head2 recursive_disk_usage(directory)
5928 Returns the number of bytes taken up by all files in some directory and all
5929 sub-directories, by summing up their lengths. The disk_usage_kb is more
5930 reflective of reality, as the filesystem typically pads file sizes to 1k or
5934 sub recursive_disk_usage
5936 my $dir = &translate_filename($_[0]);
5941 my @st = stat($dir);
5947 my @files = readdir(DIR);
5949 foreach my $f (@files) {
5950 next if ($f eq "." || $f eq "..");
5951 $rv += &recursive_disk_usage("$dir/$f");
5957 =head2 help_search_link(term, [ section, ... ] )
5959 Returns HTML for a link to the man module for searching local and online
5960 docs for various search terms. The term parameter can either be a single
5961 word like 'bind', or a space-separated list of words. This function is typically
5962 used by modules that want to refer users to additional documentation in man
5963 pages or local system doc files.
5966 sub help_search_link
5968 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
5969 my $for = &urlize(shift(@_));
5970 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
5971 join("&", map { "section=$_" } @_)."&".
5972 "for=$for&exact=1&check=".&get_module_name()."'>".
5973 $text{'helpsearch'}."</a>\n";
5980 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
5982 Opens a connection to some HTTP server, maybe through a proxy, and returns
5983 a handle object. The handle can then be used to send additional headers
5984 and read back a response. If anything goes wrong, returns an error string.
5985 The parameters are :
5987 =item host - Hostname or IP address of the webserver to connect to.
5989 =item port - HTTP port number to connect to.
5991 =item ssl - Set to 1 to connect in SSL mode.
5993 =item method - HTTP method, like GET or POST.
5995 =item page - Page to request on the webserver, like /foo/index.html
5997 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6000 sub make_http_connection
6002 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6005 foreach my $h (@$headers) {
6006 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6010 if (&is_readonly_mode()) {
6011 return "HTTP connections not allowed in readonly mode";
6013 my $rv = { 'fh' => time().$$ };
6016 eval "use Net::SSLeay";
6017 $@ && return $text{'link_essl'};
6018 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6019 eval "Net::SSLeay::load_error_strings()";
6020 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6021 return "Failed to create SSL context";
6022 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6023 return "Failed to create SSL connection";
6025 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6026 !&no_proxy($host)) {
6029 &open_socket($1, $2, $rv->{'fh'}, \$error);
6032 my $fh = $rv->{'fh'};
6033 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6034 if ($gconfig{'proxy_user'}) {
6035 my $auth = &encode_base64(
6036 "$gconfig{'proxy_user'}:".
6037 "$gconfig{'proxy_pass'}");
6038 $auth =~ tr/\r\n//d;
6039 print $fh "Proxy-Authorization: Basic $auth\r\n";
6043 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6044 return "Proxy error : $3" if ($2 != 200);
6047 return "Proxy error : $line";
6052 elsif (!$gconfig{'proxy_fallback'}) {
6053 # Connection to proxy failed - give up
6060 &open_socket($host, $port, $rv->{'fh'}, \$error);
6061 return $error if ($error);
6063 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6064 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6065 return "SSL connect() failed";
6066 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6067 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6070 # Plain HTTP request
6072 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6073 !&no_proxy($host)) {
6076 &open_socket($1, $2, $rv->{'fh'}, \$error);
6080 my $fh = $rv->{'fh'};
6081 my $rtxt = $method." ".
6082 "http://$host:$port$page HTTP/1.0\r\n";
6083 if ($gconfig{'proxy_user'}) {
6084 my $auth = &encode_base64(
6085 "$gconfig{'proxy_user'}:".
6086 "$gconfig{'proxy_pass'}");
6087 $auth =~ tr/\r\n//d;
6088 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6093 elsif (!$gconfig{'proxy_fallback'}) {
6098 # Connecting directly
6100 &open_socket($host, $port, $rv->{'fh'}, \$error);
6101 return $error if ($error);
6102 my $fh = $rv->{'fh'};
6103 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6110 =head2 read_http_connection(&handle, [bytes])
6112 Reads either one line or up to the specified number of bytes from the handle,
6113 originally supplied by make_http_connection.
6116 sub read_http_connection
6120 if ($h->{'ssl_con'}) {
6123 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6124 # need to read more..
6125 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6127 $rv = $h->{'buffer'};
6128 delete($h->{'buffer'});
6131 $h->{'buffer'} .= $more;
6133 $rv = substr($h->{'buffer'}, 0, $idx+1);
6134 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6137 if (length($h->{'buffer'})) {
6138 $rv = $h->{'buffer'};
6139 delete($h->{'buffer'});
6142 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6148 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6151 my $fh = $h->{'fh'};
6155 $rv = undef if ($rv eq "");
6159 =head2 write_http_connection(&handle, [data+])
6161 Writes the given data to the given HTTP connection handle.
6164 sub write_http_connection
6167 my $fh = $h->{'fh'};
6169 if ($h->{'ssl_ctx'}) {
6170 foreach my $s (@_) {
6171 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6172 $allok = 0 if (!$ok);
6176 my $ok = (print $fh @_);
6177 $allok = 0 if (!$ok);
6182 =head2 close_http_connection(&handle)
6184 Closes a connection to an HTTP server, identified by the given handle.
6187 sub close_http_connection
6193 =head2 clean_environment
6195 Deletes any environment variables inherited from miniserv so that they
6196 won't be passed to programs started by webmin. This is useful when calling
6197 programs that check for CGI-related environment variables and modify their
6198 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6201 sub clean_environment
6203 %UNCLEAN_ENV = %ENV;
6204 foreach my $k (keys %ENV) {
6205 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6209 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6210 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6211 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6212 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6213 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6214 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6215 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6216 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD') {
6221 =head2 reset_environment
6223 Puts the environment back how it was before clean_environment was callled.
6226 sub reset_environment
6228 if (defined(%UNCLEAN_ENV)) {
6229 foreach my $k (keys %UNCLEAN_ENV) {
6230 $ENV{$k} = $UNCLEAN_ENV{$k};
6232 undef(%UNCLEAN_ENV);
6236 =head2 progress_callback
6238 Never called directly, but useful for passing to &http_download to print
6239 out progress of an HTTP request.
6242 sub progress_callback
6244 if (defined(&theme_progress_callback)) {
6245 # Call the theme override
6246 return &theme_progress_callback(@_);
6250 print $progress_callback_prefix;
6252 $progress_size = $_[1];
6253 $progress_step = int($_[1] / 10);
6254 print &text('progress_size', $progress_callback_url,
6255 $progress_size),"<br>\n";
6258 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6260 $last_progress_time = $last_progress_size = undef;
6262 elsif ($_[0] == 3) {
6264 my $sp = $progress_callback_prefix.(" " x 5);
6265 if ($progress_size) {
6266 # And we have a size to compare against
6267 my $st = int(($_[1] * 10) / $progress_size);
6268 my $time_now = time();
6269 if ($st != $progress_step ||
6270 $time_now - $last_progress_time > 60) {
6271 # Show progress every 10% or 60 seconds
6272 print $sp,&text('progress_data', $_[1], int($_[1]*100/$progress_size)),"<br>\n";
6273 $last_progress_time = $time_now;
6275 $progress_step = $st;
6278 # No total size .. so only show in 100k jumps
6279 if ($_[1] > $last_progress_size+100*1024) {
6280 print $sp,&text('progress_data2', $_[1]),"<br>\n";
6281 $last_progress_size = $_[1];
6285 elsif ($_[0] == 4) {
6286 # All done downloading
6287 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6289 elsif ($_[0] == 5) {
6290 # Got new location after redirect
6291 $progress_callback_url = $_[1];
6293 elsif ($_[0] == 6) {
6295 $progress_callback_url = $_[1];
6296 print &text('progress_incache', $progress_callback_url),"<br>\n";
6300 =head2 switch_to_remote_user
6302 Changes the user and group of the current process to that of the unix user
6303 with the same name as the current webmin login, or fails if there is none.
6304 This should be called by Usermin module scripts that only need to run with
6305 limited permissions.
6308 sub switch_to_remote_user
6310 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6312 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6313 &create_missing_homedir(\@remote_user_info);
6315 &switch_to_unix_user(\@remote_user_info);
6316 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6317 $ENV{'HOME'} = $remote_user_info[7];
6319 # Export global variables to caller
6320 if ($main::export_to_caller) {
6321 my ($callpkg) = caller();
6322 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6326 =head2 switch_to_unix_user(&user-details)
6328 Switches the current process to the UID and group ID from the given list
6329 of user details, which must be in the format returned by getpwnam.
6332 sub switch_to_unix_user
6335 if (!defined($uinfo->[0])) {
6336 # No username given, so just use given GID
6337 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6340 # Use all groups from user
6341 ($(, $)) = ( $uinfo->[3],
6342 "$uinfo->[3] ".join(" ", $uinfo->[3],
6343 &other_groups($uinfo->[0])) );
6346 POSIX::setuid($uinfo->[2]);
6348 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6349 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6353 =head2 eval_as_unix_user(username, &code)
6355 Runs some code fragment with the effective UID and GID switch to that
6356 of the given Unix user, so that file IO takes place with his permissions.
6360 sub eval_as_unix_user
6362 my ($user, $code) = @_;
6363 my @uinfo = getpwnam($user);
6364 if (!scalar(@uinfo)) {
6365 &error("eval_as_unix_user called with invalid user $user");
6367 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6371 local $main::error_must_die = 1;
6378 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6381 return wantarray ? @rv : $rv[0];
6384 =head2 create_user_config_dirs
6386 Creates per-user config directories and sets $user_config_directory and
6387 $user_module_config_directory to them. Also reads per-user module configs
6388 into %userconfig. This should be called by Usermin module scripts that need
6389 to store per-user preferences or other settings.
6392 sub create_user_config_dirs
6394 return if (!$gconfig{'userconfig'});
6395 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6396 return if (!@uinfo || !$uinfo[7]);
6397 &create_missing_homedir(\@uinfo);
6398 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6399 if (!-d $user_config_directory) {
6400 mkdir($user_config_directory, 0700) ||
6401 &error("Failed to create $user_config_directory : $!");
6402 if ($< == 0 && $uinfo[2]) {
6403 chown($uinfo[2], $uinfo[3], $user_config_directory);
6406 if (&get_module_name()) {
6407 $user_module_config_directory = $user_config_directory."/".
6409 if (!-d $user_module_config_directory) {
6410 mkdir($user_module_config_directory, 0700) ||
6411 &error("Failed to create $user_module_config_directory : $!");
6412 if ($< == 0 && $uinfo[2]) {
6413 chown($uinfo[2], $uinfo[3], $user_config_directory);
6417 &read_file_cached("$module_root_directory/defaultuconfig",
6419 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6420 &read_file_cached("$user_module_config_directory/config",
6424 # Export global variables to caller
6425 if ($main::export_to_caller) {
6426 my ($callpkg) = caller();
6427 foreach my $v ('$user_config_directory',
6428 '$user_module_config_directory', '%userconfig') {
6429 my ($vt, $vn) = split('', $v, 2);
6430 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6435 =head2 create_missing_homedir(&uinfo)
6437 If auto homedir creation is enabled, create one for this user if needed.
6438 For internal use only.
6441 sub create_missing_homedir
6444 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6445 # Use has no home dir .. make one
6446 system("mkdir -p ".quotemeta($uinfo->[7]));
6447 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6448 if ($gconfig{'create_homedir_perms'} ne '') {
6449 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6454 =head2 filter_javascript(text)
6456 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6457 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6460 sub filter_javascript
6463 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6464 $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;
6465 $rv =~ s/(javascript:)/x$1/gi;
6466 $rv =~ s/(vbscript:)/x$1/gi;
6470 =head2 resolve_links(path)
6472 Given a path that may contain symbolic links, returns the real path.
6478 $path =~ s/\/+/\//g;
6479 $path =~ s/\/$// if ($path ne "/");
6480 my @p = split(/\/+/, $path);
6482 for(my $i=0; $i<@p; $i++) {
6483 my $sofar = "/".join("/", @p[0..$i]);
6484 my $lnk = readlink($sofar);
6485 if ($lnk eq $sofar) {
6486 # Link to itself! Cannot do anything more really ..
6489 elsif ($lnk =~ /^\//) {
6490 # Link is absolute..
6491 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6495 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6501 =head2 simplify_path(path, bogus)
6503 Given a path, maybe containing elements ".." and "." , convert it to a
6504 clean, absolute form. Returns undef if this is not possible.
6512 my @bits = split(/\/+/, $dir);
6515 foreach my $b (@bits) {
6519 elsif ($b eq "..") {
6521 if (scalar(@fixedbits) == 0) {
6522 # Cannot! Already at root!
6529 push(@fixedbits, $b);
6532 return "/".join('/', @fixedbits);
6535 =head2 same_file(file1, file2)
6537 Returns 1 if two files are actually the same
6542 return 1 if ($_[0] eq $_[1]);
6543 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6544 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6545 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6546 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6547 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6548 return 0 if (!@stat1 || !@stat2);
6549 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6552 =head2 flush_webmin_caches
6554 Clears all in-memory and on-disk caches used by Webmin.
6557 sub flush_webmin_caches
6559 undef(%main::read_file_cache);
6560 undef(%main::acl_hash_cache);
6561 undef(%main::acl_array_cache);
6562 undef(%main::has_command_cache);
6563 undef(@main::list_languages_cache);
6564 undef($main::got_list_usermods_cache);
6565 undef(@main::list_usermods_cache);
6566 undef(%main::foreign_installed_cache);
6567 unlink("$config_directory/module.infos.cache");
6568 &get_all_module_infos();
6571 =head2 list_usermods
6573 Returns a list of additional module restrictions. For internal use in
6579 if (!$main::got_list_usermods_cache) {
6580 @main::list_usermods_cache = ( );
6582 open(USERMODS, "$config_directory/usermin.mods");
6584 if (/^([^:]+):(\+|-|):(.*)/) {
6585 push(@main::list_usermods_cache,
6586 [ $1, $2, [ split(/\s+/, $3) ] ]);
6590 $main::got_list_usermods_cache = 1;
6592 return @main::list_usermods_cache;
6595 =head2 available_usermods(&allmods, &usermods)
6597 Returns a list of modules that are available to the given user, based
6598 on usermod additional/subtractions. For internal use by Usermin only.
6601 sub available_usermods
6603 return @{$_[0]} if (!@{$_[1]});
6605 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6606 my @uinfo = @remote_user_info;
6607 @uinfo = getpwnam($remote_user) if (!@uinfo);
6608 foreach my $u (@{$_[1]}) {
6610 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6613 elsif ($u->[0] =~ /^\@(.*)$/) {
6614 # Check for group membership
6615 my @ginfo = getgrnam($1);
6616 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6617 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6619 elsif ($u->[0] =~ /^\//) {
6620 # Check users and groups in file
6622 open(USERFILE, $u->[0]);
6625 if ($_ eq $remote_user) {
6628 elsif (/^\@(.*)$/) {
6629 my @ginfo = getgrnam($1);
6631 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6632 &indexof($remote_user,
6633 split(/\s+/, $ginfo[3])) >= 0));
6640 if ($u->[1] eq "+") {
6641 map { $mods{$_}++ } @{$u->[2]};
6643 elsif ($u->[1] eq "-") {
6644 map { delete($mods{$_}) } @{$u->[2]};
6648 map { $mods{$_}++ } @{$u->[2]};
6652 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6655 =head2 get_available_module_infos(nocache)
6657 Returns a list of modules available to the current user, based on
6658 operating system support, access control and usermod restrictions. Useful
6659 in themes that need to display a list of modules the user can use.
6660 Each element of the returned array is a hash reference in the same format as
6661 returned by get_module_info.
6664 sub get_available_module_infos
6667 &read_acl(\%acl, \%uacl);
6668 my $risk = $gconfig{'risk_'.$base_remote_user};
6670 foreach my $minfo (&get_all_module_infos($_[0])) {
6671 next if (!&check_os_support($minfo));
6673 # Check module risk level
6674 next if ($risk ne 'high' && $minfo->{'risk'} &&
6675 $minfo->{'risk'} !~ /$risk/);
6679 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6680 !$acl{$base_remote_user,"*"});
6682 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6686 # Check usermod restrictions
6687 my @usermods = &list_usermods();
6688 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6689 &available_usermods(\@rv, \@usermods);
6691 # Check RBAC restrictions
6693 foreach my $m (@rv) {
6694 if (&supports_rbac($m->{'dir'}) &&
6695 &use_rbac_module_acl(undef, $m->{'dir'})) {
6696 local $rbacs = &get_rbac_module_acl($remote_user,
6704 # Module or system doesn't support RBAC
6705 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
6711 if (defined(&theme_foreign_available)) {
6712 foreach my $m (@rbacrv) {
6713 if (&theme_foreign_available($m->{'dir'})) {
6722 # Check licence module vetos
6724 if ($main::licence_module) {
6725 foreach my $m (@themerv) {
6726 if (&foreign_call($main::licence_module,
6727 "check_module_licence", $m->{'dir'})) {
6739 =head2 get_visible_module_infos(nocache)
6741 Like get_available_module_infos, but excludes hidden modules from the list.
6742 Each element of the returned array is a hash reference in the same format as
6743 returned by get_module_info.
6746 sub get_visible_module_infos
6749 my $pn = &get_product_name();
6750 return grep { !$_->{'hidden'} &&
6751 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
6754 =head2 get_visible_modules_categories(nocache)
6756 Returns a list of Webmin module categories, each of which is a hash ref
6757 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
6758 of modules in the category, in the format returned by get_module_info.
6759 Un-used modules are automatically assigned to the 'unused' category, and
6760 those with no category are put into 'others'.
6763 sub get_visible_modules_categories
6766 my @mods = &get_visible_module_infos($nocache);
6768 if (&get_product_name() eq 'webmin') {
6769 @unmods = grep { $_->{'installed'} eq '0' } @mods;
6770 @mods = grep { $_->{'installed'} ne '0' } @mods;
6772 my %cats = &list_categories(\@mods);
6774 foreach my $c (keys %cats) {
6775 my $cat = { 'code' => $c || 'other',
6776 'desc' => $cats{$c} };
6777 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
6780 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
6781 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
6783 # Add un-installed modules in magic category
6784 my $cat = { 'code' => 'unused',
6785 'desc' => $text{'main_unused'},
6787 'modules' => \@unmods };
6793 =head2 is_under_directory(directory, file)
6795 Returns 1 if the given file is under the specified directory, 0 if not.
6796 Symlinks are taken into account in the file to find it's 'real' location.
6799 sub is_under_directory
6801 my ($dir, $file) = @_;
6802 return 1 if ($dir eq "/");
6803 return 0 if ($file =~ /\.\./);
6804 my $ld = &resolve_links($dir);
6806 return &is_under_directory($ld, $file);
6808 my $lp = &resolve_links($file);
6810 return &is_under_directory($dir, $lp);
6812 return 0 if (length($file) < length($dir));
6813 return 1 if ($dir eq $file);
6815 return substr($file, 0, length($dir)) eq $dir;
6818 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
6820 Given an absolute URL, returns the host, port, page and ssl flag components.
6821 Relative URLs can also be parsed, if the base information is provided.
6826 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
6828 my $ssl = $1 eq 'https';
6829 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
6835 elsif ($_[0] =~ /^\/\S*$/) {
6836 # A relative to the server URL
6837 return ($_[1], $_[2], $_[0], $_[4]);
6840 # A relative to the directory URL
6842 $page =~ s/[^\/]+$//;
6843 return ($_[1], $_[2], $page.$_[0], $_[4]);
6847 =head2 check_clicks_function
6849 Returns HTML for a JavaScript function called check_clicks that returns
6850 true when first called, but false subsequently. Useful on onClick for
6851 critical buttons. Deprecated, as this method of preventing duplicate actions
6855 sub check_clicks_function
6860 function check_clicks(form)
6867 for(i=0; i<form.length; i++)
6868 form.elements[i].disabled = true;
6877 =head2 load_entities_map
6879 Returns a hash ref containing mappings between HTML entities (like ouml) and
6880 ascii values (like 246). Mainly for internal use.
6883 sub load_entities_map
6885 if (!defined(%entities_map_cache)) {
6887 open(EMAP, "$root_directory/entities_map.txt");
6889 if (/^(\d+)\s+(\S+)/) {
6890 $entities_map_cache{$2} = $1;
6895 return \%entities_map_cache;
6898 =head2 entities_to_ascii(string)
6900 Given a string containing HTML entities like ö and 7, replace them
6901 with their ASCII equivalents.
6904 sub entities_to_ascii
6907 my $emap = &load_entities_map();
6908 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
6909 $str =~ s/&#(\d+);/chr($1)/ge;
6913 =head2 get_product_name
6915 Returns either 'webmin' or 'usermin', depending on which program the current
6916 module is in. Useful for modules that can be installed into either.
6919 sub get_product_name
6921 return $gconfig{'product'} if (defined($gconfig{'product'}));
6922 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
6927 Returns the character set for the current language, such as iso-8859-1.
6932 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
6933 $current_lang_info->{'charset'} ?
6934 $current_lang_info->{'charset'} : $default_charset;
6938 =head2 get_display_hostname
6940 Returns the system's hostname for UI display purposes. This may be different
6941 from the actual hostname if you administrator has configured it so in the
6942 Webmin Configuration module.
6945 sub get_display_hostname
6947 if ($gconfig{'hostnamemode'} == 0) {
6948 return &get_system_hostname();
6950 elsif ($gconfig{'hostnamemode'} == 3) {
6951 return $gconfig{'hostnamedisplay'};
6954 my $h = $ENV{'HTTP_HOST'};
6956 if ($gconfig{'hostnamemode'} == 2) {
6957 $h =~ s/^(www|ftp|mail)\.//i;
6963 =head2 save_module_config([&config], [modulename])
6965 Saves the configuration for some module. The config parameter is an optional
6966 hash reference of names and values to save, which defaults to the global
6967 %config hash. The modulename parameter is the module to update the config
6968 file, which defaults to the current module.
6971 sub save_module_config
6973 my $c = $_[0] || { &get_module_variable('%config') };
6974 my $m = defined($_[1]) ? $_[1] : &get_module_name();
6975 &write_file("$config_directory/$m/config", $c);
6978 =head2 save_user_module_config([&config], [modulename])
6980 Saves the user's Usermin preferences for some module. The config parameter is
6981 an optional hash reference of names and values to save, which defaults to the
6982 global %userconfig hash. The modulename parameter is the module to update the
6983 config file, which defaults to the current module.
6986 sub save_user_module_config
6988 my $c = $_[0] || { &get_module_variable('%userconfig') };
6989 my $m = $_[1] || &get_module_name();
6990 my $ucd = $user_config_directory;
6992 my @uinfo = @remote_user_info ? @remote_user_info
6993 : getpwnam($remote_user);
6994 return if (!@uinfo || !$uinfo[7]);
6995 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
6997 &write_file("$ucd/$m/config", $c);
7000 =head2 nice_size(bytes, [min])
7002 Converts a number of bytes into a number followed by a suffix like GB, MB
7003 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7004 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7009 my ($units, $uname);
7010 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7011 $units = 1024*1024*1024*1024;
7014 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7015 $units = 1024*1024*1024;
7018 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7022 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7030 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7032 return $sz." ".$uname;
7035 =head2 get_perl_path
7037 Returns the path to Perl currently in use, such as /usr/bin/perl.
7042 if (open(PERL, "$config_directory/perl-path")) {
7048 return $^X if (-x $^X);
7049 return &has_command("perl");
7052 =head2 get_goto_module([&mods])
7054 Returns the details of a module that the current user should be re-directed
7055 to after logging in, or undef if none. Useful for themes.
7060 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7061 if ($gconfig{'gotomodule'}) {
7062 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7063 return $goto if ($goto);
7065 if (@mods == 1 && $gconfig{'gotoone'}) {
7071 =head2 select_all_link(field, form, [text])
7073 Returns HTML for a 'Select all' link that uses Javascript to select
7074 multiple checkboxes with the same name. The parameters are :
7076 =item field - Name of the checkbox inputs.
7078 =item form - Index of the form on the page.
7080 =item text - Message for the link, defaulting to 'Select all'.
7085 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7086 my ($field, $form, $text) = @_;
7088 $text ||= $text{'ui_selall'};
7089 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7092 =head2 select_invert_link(field, form, text)
7094 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7095 selection on multiple checkboxes with the same name. The parameters are :
7097 =item field - Name of the checkbox inputs.
7099 =item form - Index of the form on the page.
7101 =item text - Message for the link, defaulting to 'Invert selection'.
7104 sub select_invert_link
7106 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7107 my ($field, $form, $text) = @_;
7109 $text ||= $text{'ui_selinv'};
7110 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7113 =head2 select_rows_link(field, form, text, &rows)
7115 Returns HTML for a link that uses Javascript to select rows with particular
7116 values for their checkboxes. The parameters are :
7118 =item field - Name of the checkbox inputs.
7120 =item form - Index of the form on the page.
7122 =item text - Message for the link, de
7124 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7127 sub select_rows_link
7129 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7130 my ($field, $form, $text, $rows) = @_;
7132 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7133 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7134 $js .= "return false;";
7135 return "<a href='#' onClick='$js'>$text</a>";
7138 =head2 check_pid_file(file)
7140 Given a pid file, returns the PID it contains if the process is running.
7145 open(PIDFILE, $_[0]) || return undef;
7146 my $pid = <PIDFILE>;
7148 $pid =~ /^\s*(\d+)/ || return undef;
7149 kill(0, $1) || return undef;
7155 Return the local os-specific library name to this module. For internal use only.
7160 my $mn = &get_module_name();
7161 my $md = &module_root_directory($mn);
7162 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7163 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7165 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7166 return "$mn-$gconfig{'os_type'}-lib.pl";
7168 elsif (-r "$md/$mn-generic-lib.pl") {
7169 return "$mn-generic-lib.pl";
7176 =head2 module_root_directory(module)
7178 Given a module name, returns its root directory. On a typical Webmin install,
7179 all modules are under the same directory - but it is theoretically possible to
7183 sub module_root_directory
7185 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7186 if (@root_directories > 1) {
7187 foreach my $r (@root_directories) {
7193 return "$root_directories[0]/$d";
7196 =head2 list_mime_types
7198 Returns a list of all known MIME types and their extensions, as a list of hash
7199 references with keys :
7201 =item type - The MIME type, like text/plain.
7203 =item exts - A list of extensions, like .doc and .avi.
7205 =item desc - A human-readable description for the MIME type.
7210 if (!@list_mime_types_cache) {
7212 open(MIME, "$root_directory/mime.types");
7216 if (s/#\s*(.*)$//g) {
7219 my ($type, @exts) = split(/\s+/);
7221 push(@list_mime_types_cache, { 'type' => $type,
7228 return @list_mime_types_cache;
7231 =head2 guess_mime_type(filename, [default])
7233 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7234 The optional default parameter sets a default type of use if none is found,
7235 which defaults to application/octet-stream.
7240 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7242 foreach my $t (&list_mime_types()) {
7243 foreach my $e (@{$t->{'exts'}}) {
7244 return $t->{'type'} if (lc($e) eq lc($ext));
7248 return @_ > 1 ? $_[1] : "application/octet-stream";
7251 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7253 Opens a file handle for writing to a temporary file, which will only be
7254 renamed over the real file when the handle is closed. This allows critical
7255 files like /etc/shadow to be updated safely, even if writing fails part way
7256 through due to lack of disk space. The parameters are :
7258 =item handle - File handle to open, as you would use in Perl's open function.
7260 =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.
7262 =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 $! with the error code.
7264 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7266 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7272 # Just getting a temp file
7273 if (!defined($main::open_tempfiles{$_[0]})) {
7274 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7275 my $dir = $1 || "/";
7276 my $tmp = "$dir/$2.webmintmp.$$";
7277 $main::open_tempfiles{$_[0]} = $tmp;
7278 push(@main::temporary_files, $tmp);
7280 return $main::open_tempfiles{$_[0]};
7284 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7285 $fh = &callers_package($fh);
7287 my %gaccess = &get_module_acl(undef, "");
7288 my $db = $gconfig{'debug_what_write'};
7289 if ($file =~ /\r|\n|\0/) {
7290 if ($noerror) { return 0; }
7291 else { &error("Filename contains invalid characters"); }
7293 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7294 # Read-only mode .. veto all writes
7295 print STDERR "vetoing write to $file\n";
7296 return open($fh, ">$null_file");
7298 elsif ($file =~ /^(>|>>|)nul$/i) {
7299 # Write to Windows null device
7300 &webmin_debug_log($1 eq ">" ? "WRITE" :
7301 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7303 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7304 # Writes to /dev/null or TTYs don't need to be handled
7305 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7306 return open($fh, $file);
7308 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7309 &webmin_debug_log("WRITE", $1) if ($db);
7310 # Over-writing a file, via a temp file
7312 $file = &translate_filename($file);
7314 # Open the link target instead
7315 $file = &resolve_links($file);
7318 # Cannot open a directory!
7319 if ($noerror) { return 0; }
7320 else { &error("Cannot write to directory $file"); }
7322 my $tmp = &open_tempfile($file);
7323 my $ex = open($fh, ">$tmp");
7324 if (!$ex && $! =~ /permission/i) {
7325 # Could not open temp file .. try opening actual file
7327 $ex = open($fh, ">$file");
7328 delete($main::open_tempfiles{$file});
7331 $main::open_temphandles{$fh} = $file;
7334 if (!$ex && !$noerror) {
7335 &error(&text("efileopen", $file, $!));
7339 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7340 # Just writing direct to a file
7341 &webmin_debug_log("WRITE", $1) if ($db);
7343 $file = &translate_filename($file);
7344 my @old_attributes = &get_clear_file_attributes($file);
7345 my $ex = open($fh, ">$file");
7346 &reset_file_attributes($file, \@old_attributes);
7347 $main::open_temphandles{$fh} = $file;
7348 if (!$ex && !$noerror) {
7349 &error(&text("efileopen", $file, $!));
7354 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7355 # Appending to a file .. nothing special to do
7356 &webmin_debug_log("APPEND", $1) if ($db);
7358 $file = &translate_filename($file);
7359 my @old_attributes = &get_clear_file_attributes($file);
7360 my $ex = open($fh, ">>$file");
7361 &reset_file_attributes($file, \@old_attributes);
7362 $main::open_temphandles{$fh} = $file;
7363 if (!$ex && !$noerror) {
7364 &error(&text("efileopen", $file, $!));
7369 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7370 # Read mode .. nothing to do here
7371 &webmin_debug_log("READ", $file) if ($db);
7372 $file = &translate_filename($file);
7373 return open($fh, $file);
7375 elsif ($file eq ">" || $file eq ">>") {
7376 my ($package, $filename, $line) = caller;
7377 if ($noerror) { return 0; }
7378 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7381 my ($package, $filename, $line) = caller;
7382 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7387 =head2 close_tempfile(file|handle)
7389 Copies a temp file to the actual file, assuming that all writes were
7390 successful. The handle must have been one passed to open_tempfile.
7396 my $fh = &callers_package($_[0]);
7398 if (defined($file = $main::open_temphandles{$fh})) {
7400 close($fh) || &error(&text("efileclose", $file, $!));
7401 delete($main::open_temphandles{$fh});
7402 return &close_tempfile($file);
7404 elsif (defined($main::open_tempfiles{$_[0]})) {
7406 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7407 my @st = stat($_[0]);
7408 if (&is_selinux_enabled() && &has_command("chcon")) {
7409 # Set original security context
7410 system("chcon --reference=".quotemeta($_[0]).
7411 " ".quotemeta($main::open_tempfiles{$_[0]}).
7412 " >/dev/null 2>&1");
7414 my @old_attributes = &get_clear_file_attributes($_[0]);
7415 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7417 # Set original permissions and ownership
7418 chmod($st[2], $_[0]);
7419 chown($st[4], $st[5], $_[0]);
7421 &reset_file_attributes($_[0], \@old_attributes);
7422 delete($main::open_tempfiles{$_[0]});
7423 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7424 if ($main::open_templocks{$_[0]}) {
7425 &unlock_file($_[0]);
7426 delete($main::open_templocks{$_[0]});
7431 # Must be closing a handle not associated with a file
7437 =head2 print_tempfile(handle, text, ...)
7439 Like the normal print function, but calls &error on failure. Useful when
7440 combined with open_tempfile, to ensure that a criticial file is never
7441 only partially written.
7446 my ($fh, @args) = @_;
7447 $fh = &callers_package($fh);
7448 (print $fh @args) || &error(&text("efilewrite",
7449 $main::open_temphandles{$fh} || $fh, $!));
7452 =head2 is_selinux_enabled
7454 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7457 sub is_selinux_enabled
7459 if (!defined($main::selinux_enabled_cache)) {
7461 if ($gconfig{'os_type'} !~ /-linux$/) {
7462 # Not on linux, so no way
7463 $main::selinux_enabled_cache = 0;
7465 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7466 # Use global config file
7467 $main::selinux_enabled_cache =
7468 $seconfig{'SELINUX'} eq 'disabled' ||
7469 !$seconfig{'SELINUX'} ? 0 : 1;
7472 # Use selinuxenabled command
7473 #$selinux_enabled_cache =
7474 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7475 $main::selinux_enabled_cache = 0;
7478 return $main::selinux_enabled_cache;
7481 =head2 get_clear_file_attributes(file)
7483 Finds file attributes that may prevent writing, clears them and returns them
7484 as a list. May call error. Mainly for internal use by open_tempfile and
7488 sub get_clear_file_attributes
7492 if ($gconfig{'chattr'}) {
7493 # Get original immutable bit
7494 my $out = &backquote_command(
7495 "lsattr ".quotemeta($file)." 2>/dev/null");
7497 $out =~ s/\s\S+\n//;
7498 @old_attributes = grep { $_ ne '-' } split(//, $out);
7500 if (&indexof("i", @old_attributes) >= 0) {
7501 my $err = &backquote_logged(
7502 "chattr -i ".quotemeta($file)." 2>&1");
7504 &error("Failed to remove immutable bit on ".
7509 return @old_attributes;
7512 =head2 reset_file_attributes(file, &attributes)
7514 Put back cleared attributes on some file. May call error. Mainly for internal
7515 use by close_tempfile.
7518 sub reset_file_attributes
7520 my ($file, $old_attributes) = @_;
7521 if (&indexof("i", @$old_attributes) >= 0) {
7522 my $err = &backquote_logged(
7523 "chattr +i ".quotemeta($file)." 2>&1");
7525 &error("Failed to restore immutable bit on ".
7531 =head2 cleanup_tempnames
7533 Remove all temporary files generated using transname. Typically only called
7534 internally when a Webmin script exits.
7537 sub cleanup_tempnames
7539 foreach my $t (@main::temporary_files) {
7542 @main::temporary_files = ( );
7545 =head2 open_lock_tempfile([handle], file, [no-error])
7547 Returns a temporary file for writing to some actual file, and also locks it.
7548 Effectively the same as calling lock_file and open_tempfile on the same file,
7549 but calls the unlock for you automatically when it is closed.
7552 sub open_lock_tempfile
7554 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7555 $fh = &callers_package($fh);
7556 my $lockfile = $file;
7557 $lockfile =~ s/^[^\/]*//;
7558 if ($lockfile =~ /^\//) {
7559 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7561 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7566 $main::end_exit_status ||= $?;
7567 if ($$ == $main::initial_process_id) {
7568 # Exiting from initial process
7569 &cleanup_tempnames();
7570 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7571 $main::debug_log_start_module eq &get_module_name()) {
7572 my $len = time() - $main::debug_log_start_time;
7573 &webmin_debug_log("STOP", "runtime=$len");
7574 $main::debug_log_start_time = 0;
7576 if (!$ENV{'SCRIPT_NAME'} &&
7577 $main::initial_module_name eq &get_module_name()) {
7578 # In a command-line script - call the real exit, so that the
7579 # exit status gets properly propogated. In some cases this
7580 # was not happening.
7581 exit($main::end_exit_status);
7586 =head2 month_to_number(month)
7588 Converts a month name like feb to a number like 1.
7593 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7596 =head2 number_to_month(number)
7598 Converts a number like 1 to a month name like Feb.
7603 return ucfirst($number_to_month_map{$_[0]});
7606 =head2 get_rbac_module_acl(user, module)
7608 Returns a hash reference of RBAC overrides ACLs for some user and module.
7609 May return undef if none exist (indicating access denied), or the string *
7610 if full access is granted.
7613 sub get_rbac_module_acl
7615 my ($user, $mod) = @_;
7616 eval "use Authen::SolarisRBAC";
7617 return undef if ($@);
7620 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7621 # Automagic webmin.modulename.admin authorization exists .. allow access
7623 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7624 %rv = ( 'noconfig' => 1 );
7631 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7635 my ($auths, $acls) = split(/\s+/, $_);
7636 my @auths = split(/,/, $auths);
7638 my ($merge) = ($acls =~ s/^\+//);
7640 if ($auths eq "*") {
7641 # These ACLs apply to all RBAC users.
7642 # Only if there is some that match a specific authorization
7643 # later will they be used though.
7646 # Check each of the RBAC authorizations
7647 foreach my $a (@auths) {
7648 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7653 $foundany++ if ($gotall);
7656 # Found an RBAC authorization - return the ACLs
7657 return "*" if ($acls eq "*");
7658 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7660 # Just add to current set
7661 foreach my $a (keys %acl) {
7672 return !$foundany ? undef : %rv ? \%rv : undef;
7675 =head2 supports_rbac([module])
7677 Returns 1 if RBAC client support is available, such as on Solaris.
7682 return 0 if ($gconfig{'os_type'} ne 'solaris');
7683 eval "use Authen::SolarisRBAC";
7686 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7691 =head2 use_rbac_module_acl(user, module)
7693 Returns 1 if some user should use RBAC to get permissions for a module
7696 sub use_rbac_module_acl
7698 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
7699 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7700 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
7701 my %access = &get_module_acl($u, $m, 1);
7702 return $access{'rbac'} ? 1 : 0;
7705 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
7707 Runs some command, possibly feeding it input and capturing output to the
7708 give files or scalar references. The parameters are :
7710 =item command - Full command to run, possibly including shell meta-characters.
7712 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
7714 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
7716 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
7718 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
7720 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
7725 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
7726 if (&is_readonly_mode() && !$safe) {
7727 print STDERR "Vetoing command $_[0]\n";
7731 $cmd = &translate_command($cmd);
7733 # Use ` operator where possible
7734 if (!$stdin && ref($stdout) && !$stderr) {
7735 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7736 $$stdout = `$cmd 2>$null_file`;
7739 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
7740 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7741 $$stdout = `$cmd 2>&1`;
7744 elsif (!$stdin && !$stdout && !$stderr) {
7745 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
7746 return system("$cmd >$null_file 2>$null_file <$null_file");
7748 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
7751 $| = 1; # needed on some systems to flush before forking
7752 pipe(EXECSTDINr, EXECSTDINw);
7753 pipe(EXECSTDOUTr, EXECSTDOUTw);
7754 pipe(EXECSTDERRr, EXECSTDERRw);
7756 if (!($pid = fork())) {
7760 open(STDIN, "<&EXECSTDINr");
7761 open(STDOUT, ">&EXECSTDOUTw");
7762 if (ref($stderr) && $stderr eq $stdout) {
7763 open(STDERR, ">&EXECSTDOUTw");
7766 open(STDERR, ">&EXECSTDERRw");
7773 my $fullcmd = "($cmd)";
7774 if ($stdin && !ref($stdin)) {
7775 $fullcmd .= " <$stdin";
7777 if ($stdout && !ref($stdout)) {
7778 $fullcmd .= " >$stdout";
7780 if ($stderr && !ref($stderr)) {
7781 if ($stderr eq $stdout) {
7782 $fullcmd .= " 2>&1";
7785 $fullcmd .= " 2>$stderr";
7788 if ($gconfig{'os_type'} eq 'windows') {
7792 exec("/bin/sh", "-c", $fullcmd);
7794 print "Exec failed : $!\n";
7801 # Feed input and capture output
7803 if ($stdin && ref($stdin)) {
7804 print EXECSTDINw $$stdin;
7807 if ($stdout && ref($stdout)) {
7809 while(<EXECSTDOUTr>) {
7814 if ($stderr && ref($stderr) && $stderr ne $stdout) {
7816 while(<EXECSTDERRr>) {
7827 =head2 open_readfile(handle, file)
7829 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
7830 exactly the same as Perl's open function.
7835 my ($fh, $file) = @_;
7836 $fh = &callers_package($fh);
7837 my $realfile = &translate_filename($file);
7838 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
7839 return open($fh, "<".$realfile);
7842 =head2 open_execute_command(handle, command, output?, safe?)
7844 Runs some command, with the specified file handle set to either write to it if
7845 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
7846 indicates if the command modifies the state of the system or not.
7849 sub open_execute_command
7851 my ($fh, $cmd, $mode, $safe) = @_;
7852 $fh = &callers_package($fh);
7853 my $realcmd = &translate_command($cmd);
7854 if (&is_readonly_mode() && !$safe) {
7855 # Don't actually run it
7856 print STDERR "vetoing command $cmd\n";
7859 return open($fh, ">$null_file");
7862 return open($fh, $null_file);
7866 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
7867 if ($gconfig{'debug_what_cmd'});
7869 return open($fh, "| $cmd");
7871 elsif ($mode == 1) {
7872 return open($fh, "$cmd 2>$null_file |");
7874 elsif ($mode == 2) {
7875 return open($fh, "$cmd 2>&1 |");
7879 =head2 translate_filename(filename)
7881 Applies all relevant registered translation functions to a filename. Mostly
7882 for internal use, and typically does nothing.
7885 sub translate_filename
7887 my ($realfile) = @_;
7888 my @funcs = grep { $_->[0] eq &get_module_name() ||
7889 !defined($_->[0]) } @main::filename_callbacks;
7890 foreach my $f (@funcs) {
7892 $realfile = &$func($realfile, @{$f->[2]});
7897 =head2 translate_command(filename)
7899 Applies all relevant registered translation functions to a command. Mostly
7900 for internal use, and typically does nothing.
7903 sub translate_command
7906 my @funcs = grep { $_->[0] eq &get_module_name() ||
7907 !defined($_->[0]) } @main::command_callbacks;
7908 foreach my $f (@funcs) {
7910 $realcmd = &$func($realcmd, @{$f->[2]});
7915 =head2 register_filename_callback(module|undef, &function, &args)
7917 Registers some function to be called when the specified module (or all
7918 modules) tries to open a file for reading and writing. The function must
7919 return the actual file to open. This allows you to override which files
7920 other code actually operates on, via the translate_filename function.
7923 sub register_filename_callback
7925 my ($mod, $func, $args) = @_;
7926 push(@main::filename_callbacks, [ $mod, $func, $args ]);
7929 =head2 register_command_callback(module|undef, &function, &args)
7931 Registers some function to be called when the specified module (or all
7932 modules) tries to execute a command. The function must return the actual
7933 command to run. This allows you to override which commands other other code
7934 actually runs, via the translate_command function.
7937 sub register_command_callback
7939 my ($mod, $func, $args) = @_;
7940 push(@main::command_callbacks, [ $mod, $func, $args ]);
7943 =head2 capture_function_output(&function, arg, ...)
7945 Captures output that some function prints to STDOUT, and returns it. Useful
7946 for functions outside your control that print data when you really want to
7947 manipulate it before output.
7950 sub capture_function_output
7952 my ($func, @args) = @_;
7953 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
7954 my $old = select(SOCKET1);
7955 my @rv = &$func(@args);
7964 return wantarray ? ($out, \@rv) : $out;
7967 =head2 capture_function_output_tempfile(&function, arg, ...)
7969 Behaves the same as capture_function_output, but uses a temporary file
7970 to avoid buffer full problems.
7973 sub capture_function_output_tempfile
7975 my ($func, @args) = @_;
7976 my $temp = &transname();
7977 open(BUFFER, ">$temp");
7978 my $old = select(BUFFER);
7979 my @rv = &$func(@args);
7982 my $out = &read_file_contents($temp);
7983 &unlink_file($temp);
7984 return wantarray ? ($out, \@rv) : $out;
7987 =head2 modules_chooser_button(field, multiple, [form])
7989 Returns HTML for a button for selecting one or many Webmin modules.
7990 field - Name of the HTML field to place the module names into.
7991 multiple - Set to 1 if multiple modules can be selected.
7992 form - Index of the form on the page.
7995 sub modules_chooser_button
7997 return &theme_modules_chooser_button(@_)
7998 if (defined(&theme_modules_chooser_button));
7999 my $form = defined($_[2]) ? $_[2] : 0;
8000 my $w = $_[1] ? 700 : 500;
8002 if ($_[1] && $gconfig{'db_sizemodules'}) {
8003 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8005 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8006 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8008 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";
8011 =head2 substitute_template(text, &hash)
8013 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8014 the text replaces it with the value of the hash key foo. Also supports blocks
8015 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8016 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8019 sub substitute_template
8021 # Add some extra fixed parameters to the hash
8022 my %hash = %{$_[1]};
8023 $hash{'hostname'} = &get_system_hostname();
8024 $hash{'webmin_config'} = $config_directory;
8025 $hash{'webmin_etc'} = $config_directory;
8026 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8027 $hash{'webmin_var'} = $var_directory;
8029 # Add time-based parameters, for use in DNS
8030 $hash{'current_time'} = time();
8031 my @tm = localtime($hash{'current_time'});
8032 $hash{'current_year'} = $tm[5]+1900;
8033 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8034 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8035 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8036 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8037 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8039 # Actually do the substition
8041 foreach my $s (keys %hash) {
8042 next if ($s eq ''); # Prevent just $ from being subbed
8045 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8046 $rv =~ s/\$\Q$us\E/$sv/g;
8048 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8049 # and ${IF}..${ENDIF} with value
8050 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8051 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8053 # Replace $IF..$ELSE..$ENDIF block with first value,
8054 # and $IF..$ENDIF with value
8055 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8056 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8058 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8059 # matching, nothing if not
8060 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8061 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8063 # Replace $IFEQ..$ENDIFEQ block with first value if
8064 # matching, nothing if not
8065 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8066 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8069 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8070 # and ${IF}..${ENDIF} with nothing
8071 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8072 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8074 # Replace $IF..$ELSE..$ENDIF block with second value,
8075 # and $IF..$ENDIF with nothing
8076 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8077 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8079 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8080 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8081 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8085 # Now assume any $IF blocks whose variables are not present in the hash
8086 # evaluate to false.
8087 # $IF...$ELSE x $ENDIF => x
8088 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8089 # $IF...x...$ENDIF => (nothing)
8090 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8091 # ${var} => (nothing)
8092 $rv =~ s/\$\{[A-Z]+\}//g;
8097 =head2 running_in_zone
8099 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8100 disable module and features that are not appropriate, like those that modify
8101 mounted filesystems.
8106 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8107 $gconfig{'os_version'} < 10);
8108 my $zn = `zonename 2>$null_file`;
8110 return $zn && $zn ne "global";
8113 =head2 running_in_vserver
8115 Returns 1 if the current Webmin instance is running in a Linux VServer.
8116 Used to disable modules and features that are not appropriate.
8119 sub running_in_vserver
8121 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8124 open(MTAB, "/etc/mtab");
8126 my ($dev, $mp) = split(/\s+/, $_);
8127 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8136 =head2 running_in_xen
8138 Returns 1 if Webmin is running inside a Xen instance, by looking
8139 at /proc/xen/capabilities.
8144 return 0 if (!-r "/proc/xen/capabilities");
8145 my $cap = &read_file_contents("/proc/xen/capabilities");
8146 return $cap =~ /control_d/ ? 0 : 1;
8149 =head2 list_categories(&modules, [include-empty])
8151 Returns a hash mapping category codes to names, including any custom-defined
8152 categories. The modules parameter must be an array ref of module hash objects,
8153 as returned by get_all_module_infos.
8158 my ($mods, $empty) = @_;
8159 my (%cats, %catnames);
8160 &read_file("$config_directory/webmin.catnames", \%catnames);
8161 foreach my $o (@lang_order_list) {
8162 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8167 foreach my $m (@$mods) {
8168 my $c = $m->{'category'};
8169 next if ($cats{$c});
8170 if (defined($catnames{$c})) {
8171 $cats{$c} = $catnames{$c};
8173 elsif ($text{"category_$c"}) {
8174 $cats{$c} = $text{"category_$c"};
8177 # try to get category name from module ..
8178 my %mtext = &load_language($m->{'dir'});
8179 if ($mtext{"category_$c"}) {
8180 $cats{$c} = $mtext{"category_$c"};
8183 $c = $m->{'category'} = "";
8184 $cats{$c} = $text{"category_$c"};
8191 =head2 is_readonly_mode
8193 Returns 1 if the current user is in read-only mode, and thus all writes
8194 to files and command execution should fail.
8197 sub is_readonly_mode
8199 if (!defined($main::readonly_mode_cache)) {
8200 my %gaccess = &get_module_acl(undef, "");
8201 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8203 return $main::readonly_mode_cache;
8206 =head2 command_as_user(user, with-env?, command, ...)
8208 Returns a command to execute some command as the given user, using the
8209 su statement. If on Linux, the /bin/sh shell is forced in case the user
8210 does not have a valid shell. If with-env is set to 1, the -s flag is added
8211 to the su command to read the user's .profile or .bashrc file.
8216 my ($user, $env, @args) = @_;
8217 my @uinfo = getpwnam($user);
8218 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8219 # User shell doesn't appear to be valid
8220 if ($gconfig{'os_type'} =~ /-linux$/) {
8221 # Use -s /bin/sh to force it
8222 $shellarg = " -s /bin/sh";
8224 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8225 $gconfig{'os_type'} eq 'solaris' &&
8226 $gconfig{'os_version'} >= 11 ||
8227 $gconfig{'os_type'} eq 'macos') {
8228 # Use -m and force /bin/sh
8229 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8233 my $rv = "su".($env ? " -" : "").$shellarg.
8234 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8238 =head2 list_osdn_mirrors(project, file)
8240 This function is now deprecated in favor of letting sourceforge just
8241 redirect to the best mirror, and now just returns their primary download URL.
8244 sub list_osdn_mirrors
8246 my ($project, $file) = @_;
8247 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8249 'mirror' => 'downloads' } );
8252 =head2 convert_osdn_url(url)
8254 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8255 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8256 to a real URL on the sourceforge download redirector.
8259 sub convert_osdn_url
8262 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8263 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8264 # Always use the Sourceforge mail download URL, which does
8265 # a location-based redirect for us
8266 my ($project, $file) = ($1, $2);
8267 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8269 return wantarray ? ( $url, 0 ) : $url;
8272 # Some other source .. don't change
8273 return wantarray ? ( $url, 2 ) : $url;
8277 =head2 get_current_dir
8279 Returns the directory the current process is running in.
8285 if ($gconfig{'os_type'} eq 'windows') {
8298 =head2 supports_users
8300 Returns 1 if the current OS supports Unix user concepts and functions like
8301 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8307 return $gconfig{'os_type'} ne 'windows';
8310 =head2 supports_symlinks
8312 Returns 1 if the current OS supports symbolic and hard links. This will not
8313 be the case on Windows.
8316 sub supports_symlinks
8318 return $gconfig{'os_type'} ne 'windows';
8321 =head2 quote_path(path)
8323 Returns a path with safe quoting for the current operating system.
8329 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8330 # Windows only supports "" style quoting
8334 return quotemeta($path);
8338 =head2 get_windows_root
8340 Returns the base windows system directory, like c:/windows.
8343 sub get_windows_root
8345 if ($ENV{'SystemRoot'}) {
8346 my $rv = $ENV{'SystemRoot'};
8351 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8355 =head2 read_file_contents(file)
8357 Given a filename, returns its complete contents as a string. Effectively
8358 the same as the Perl construct `cat file`.
8361 sub read_file_contents
8363 &open_readfile(FILE, $_[0]) || return undef;
8370 =head2 unix_crypt(password, salt)
8372 Performs Unix encryption on a password, using the built-in crypt function or
8373 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8374 must be either an already-hashed password, or a two-character alpha-numeric
8380 my ($pass, $salt) = @_;
8381 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8382 my $rv = eval "crypt(\$pass, \$salt)";
8384 return $rv if ($rv && !$@);
8385 eval "use Crypt::UnixCrypt";
8387 return Crypt::UnixCrypt::crypt($pass, $salt);
8390 &error("Failed to encrypt password : $err");
8394 =head2 split_quoted_string(string)
8396 Given a string like I<foo "bar baz" quux>, returns the array :
8400 sub split_quoted_string
8404 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8405 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8406 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8413 =head2 write_to_http_cache(url, file|&data)
8415 Updates the Webmin cache with the contents of the given file, possibly also
8416 clearing out old data. Mainly for internal use by http_download.
8419 sub write_to_http_cache
8421 my ($url, $file) = @_;
8422 return 0 if (!$gconfig{'cache_size'});
8424 # Don't cache downloads that look dynamic
8425 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8429 # Check if the current module should do caching
8430 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8431 # Caching all except some modules
8432 my @mods = split(/\s+/, $1);
8433 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8435 elsif ($gconfig{'cache_mods'}) {
8436 # Only caching some modules
8437 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8438 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8444 $size = length($$file);
8447 my @st = stat($file);
8451 if ($size > $gconfig{'cache_size'}) {
8452 # Bigger than the whole cache - so don't save it
8457 $cfile = "$main::http_cache_directory/$cfile";
8459 # See how much we have cached currently, clearing old files
8461 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8462 opendir(CACHEDIR, $main::http_cache_directory);
8463 foreach my $f (readdir(CACHEDIR)) {
8464 next if ($f eq "." || $f eq "..");
8465 my $path = "$main::http_cache_directory/$f";
8466 my @st = stat($path);
8467 if ($gconfig{'cache_days'} &&
8468 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8469 # This file is too old .. trash it
8474 push(@cached, [ $path, $st[7], $st[9] ]);
8478 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8479 while($total+$size > $gconfig{'cache_size'} && @cached) {
8480 # Cache is too big .. delete some files until the new one will fit
8481 unlink($cached[0]->[0]);
8482 $total -= $cached[0]->[1];
8486 # Finally, write out the new file
8488 &open_tempfile(CACHEFILE, ">$cfile");
8489 &print_tempfile(CACHEFILE, $$file);
8490 &close_tempfile(CACHEFILE);
8493 my ($ok, $err) = ©_source_dest($file, $cfile);
8499 =head2 check_in_http_cache(url)
8501 If some URL is in the cache and valid, return the filename for it. Mainly
8502 for internal use by http_download.
8505 sub check_in_http_cache
8508 return undef if (!$gconfig{'cache_size'});
8510 # Check if the current module should do caching
8511 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8512 # Caching all except some modules
8513 my @mods = split(/\s+/, $1);
8514 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8516 elsif ($gconfig{'cache_mods'}) {
8517 # Only caching some modules
8518 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8519 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8524 $cfile = "$main::http_cache_directory/$cfile";
8525 my @st = stat($cfile);
8526 return undef if (!@st || !$st[7]);
8527 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8532 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8537 =head2 supports_javascript
8539 Returns 1 if the current browser is assumed to support javascript.
8542 sub supports_javascript
8544 if (defined(&theme_supports_javascript)) {
8545 return &theme_supports_javascript();
8547 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8550 =head2 get_module_name
8552 Returns the name of the Webmin module that called this function. For internal
8553 use only by other API functions.
8558 return &get_module_variable('$module_name');
8561 =head2 get_module_variable(name, [ref])
8563 Returns the value of some variable which is set in the caller's context, if
8564 using the new WebminCore package. For internal use only.
8567 sub get_module_variable
8569 my ($v, $wantref) = @_;
8570 my $slash = $wantref ? "\\" : "";
8571 my $thispkg = &web_libs_package();
8572 if ($thispkg eq 'WebminCore') {
8573 my ($vt, $vn) = split('', $v, 2);
8575 for(my $i=0; ($callpkg) = caller($i); $i++) {
8576 last if ($callpkg ne $thispkg);
8578 return eval "${slash}${vt}${callpkg}::${vn}";
8580 return eval "${slash}${v}";
8583 =head2 clear_time_locale()
8585 Temporarily force the locale to C, until reset_time_locale is called. This is
8586 useful if your code is going to call C<strftime> from the POSIX package, and
8587 you want to ensure that the output is in a consistent format.
8590 sub clear_time_locale
8592 if ($main::clear_time_locale_count == 0) {
8595 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8596 POSIX::setlocale(POSIX::LC_TIME, "C");
8599 $main::clear_time_locale_count++;
8602 =head2 reset_time_locale()
8604 Revert the locale to whatever it was before clear_time_locale was called
8607 sub reset_time_locale
8609 if ($main::clear_time_locale_count == 1) {
8611 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8612 $main::clear_time_locale_old = undef;
8615 $main::clear_time_locale_count--;
8618 =head2 callers_package(filehandle)
8620 Convert a non-module filehandle like FOO to one qualified with the
8621 caller's caller's package, like fsdump::FOO. For internal use only.
8627 my $callpkg = (caller(1))[0];
8628 my $thispkg = &web_libs_package();
8629 if (!ref($fh) && $fh !~ /::/ &&
8630 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8631 $fh = $callpkg."::".$fh;
8636 =head2 web_libs_package()
8638 Returns the package this code is in. We can't always trust __PACKAGE__. For
8642 sub web_libs_package
8644 if ($called_from_webmin_core) {
8645 return "WebminCore";
8650 $done_web_lib_funcs = 1;