1 =head1 web-lib-funcs.pl
3 Common functions for Webmin CGI scripts. This file gets in-directly included
4 by all scripts that use web-lib.pl.
9 ui_print_header(undef, 'My Module', '');
10 print 'This is Webmin version ',get_webmin_version(),'<p>\n';
19 use vars qw($user_risk_level $loaded_theme_library $wait_for_input
20 $done_webmin_header $trust_unknown_referers $unsafe_index_cgi
21 %done_foreign_require $webmin_feedback_address
22 $user_skill_level $pragma_no_cache $foreign_args);
24 use vars qw($module_index_name $number_to_month_map $month_to_number_map
25 $umask_already $default_charset $licence_status $os_type
26 $licence_message $script_name $loaded_theme_oo_library
27 $done_web_lib_funcs $os_version $module_index_link
28 $called_from_webmin_core);
30 =head2 read_file(file, &hash, [&order], [lowercase], [split-char])
32 Fill the given hash reference with name=value pairs from a file. The required
35 =item file - The file to head, which must be text with each line like name=value
37 =item hash - The hash reference to add values read from the file to.
39 =item order - If given, an array reference to add names to in the order they were read
41 =item lowercase - If set to 1, names are converted to lower case
43 =item split-char - If set, names and values are split on this character instead of =
49 my $split = defined($_[4]) ? $_[4] : "=";
50 my $realfile = &translate_filename($_[0]);
51 &open_readfile(ARFILE, $_[0]) || return 0;
54 my $hash = index($_, "#");
55 my $eq = index($_, $split);
56 if ($hash != 0 && $eq >= 0) {
57 my $n = substr($_, 0, $eq);
58 my $v = substr($_, $eq+1);
60 $_[1]->{$_[3] ? lc($n) : $n} = $v;
61 push(@{$_[2]}, $n) if ($_[2]);
65 $main::read_file_missing{$realfile} = 0; # It exists now
66 if (defined($main::read_file_cache{$realfile})) {
67 %{$main::read_file_cache{$realfile}} = %{$_[1]};
72 =head2 read_file_cached(file, &hash, [&order], [lowercase], [split-char])
74 Like read_file, but reads from an in-memory cache if the file has already been
75 read in this Webmin script. Recommended, as it behaves exactly the same as
76 read_file, but can be much faster.
81 my $realfile = &translate_filename($_[0]);
82 if (defined($main::read_file_cache{$realfile})) {
84 %{$_[1]} = ( %{$_[1]}, %{$main::read_file_cache{$realfile}} );
87 elsif ($main::read_file_missing{$realfile}) {
88 # Doesn't exist, so don't re-try read
92 # Actually read the file
94 if (&read_file($_[0], \%d, $_[2], $_[3], $_[4])) {
95 %{$main::read_file_cache{$realfile}} = %d;
96 %{$_[1]} = ( %{$_[1]}, %d );
100 # Flag as non-existant
101 $main::read_file_missing{$realfile} = 1;
107 =head2 write_file(file, &hash, [join-char])
109 Write out the contents of a hash as name=value lines. The parameters are :
111 =item file - Full path to write to
113 =item hash - A hash reference containing names and values to output
115 =item join-char - If given, names and values are separated by this instead of =
121 my $join = defined($_[2]) ? $_[2] : "=";
122 my $realfile = &translate_filename($_[0]);
123 &read_file($_[0], \%old, \@order);
124 &open_tempfile(ARFILE, ">$_[0]");
125 foreach $k (@order) {
126 if (exists($_[1]->{$k})) {
127 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
128 &error(&text("efilewrite", $realfile, $!));
131 foreach $k (keys %{$_[1]}) {
132 if (!exists($old{$k})) {
133 (print ARFILE $k,$join,$_[1]->{$k},"\n") ||
134 &error(&text("efilewrite", $realfile, $!));
137 &close_tempfile(ARFILE);
138 if (defined($main::read_file_cache{$realfile})) {
139 %{$main::read_file_cache{$realfile}} = %{$_[1]};
141 if (defined($main::read_file_missing{$realfile})) {
142 $main::read_file_missing{$realfile} = 0;
146 =head2 html_escape(string)
148 Converts &, < and > codes in text to HTML entities, and returns the new string.
149 This should be used when including data read from other sources in HTML pages.
158 $tmp =~ s/\"/"/g;
159 $tmp =~ s/\'/'/g;
164 =head2 quote_escape(string, [only-quote])
166 Converts ' and " characters in a string into HTML entities, and returns it.
167 Useful for outputing HTML tag values.
172 my ($tmp, $only) = @_;
173 if ($tmp !~ /\&[a-zA-Z]+;/ && $tmp !~ /\&#/) {
174 # convert &, unless it is part of &#nnn; or &foo;
175 $tmp =~ s/&([^#])/&$1/g;
177 $tmp =~ s/&$/&/g;
178 $tmp =~ s/\"/"/g if ($only eq '' || $only eq '"');
179 $tmp =~ s/\'/'/g if ($only eq '' || $only eq "'");
183 =head2 tempname([filename])
185 Returns a mostly random temporary file name, typically under the /tmp/.webmin
186 directory. If filename is given, this will be the base name used. Otherwise
187 a unique name is selected randomly.
192 my $tmp_base = $gconfig{'tempdir_'.&get_module_name()} ?
193 $gconfig{'tempdir_'.&get_module_name()} :
194 $gconfig{'tempdir'} ? $gconfig{'tempdir'} :
195 $ENV{'TEMP'} ? $ENV{'TEMP'} :
196 $ENV{'TMP'} ? $ENV{'TMP'} :
197 -d "c:/temp" ? "c:/temp" : "/tmp/.webmin";
198 my $tmp_dir = -d $remote_user_info[7] && !$gconfig{'nohometemp'} ?
199 "$remote_user_info[7]/.tmp" :
200 @remote_user_info ? $tmp_base."-".$remote_user :
201 $< != 0 ? $tmp_base."-".getpwuid($<) :
203 if ($gconfig{'os_type'} eq 'windows' || $tmp_dir =~ /^[a-z]:/i) {
204 # On Windows system, just create temp dir if missing
206 mkdir($tmp_dir, 0755) ||
207 &error("Failed to create temp directory $tmp_dir : $!");
211 # On Unix systems, need to make sure temp dir is valid
213 while($tries++ < 10) {
214 my @st = lstat($tmp_dir);
215 last if ($st[4] == $< && (-d _) && ($st[2] & 0777) == 0755);
217 unlink($tmp_dir) || rmdir($tmp_dir) ||
218 system("/bin/rm -rf ".quotemeta($tmp_dir));
220 mkdir($tmp_dir, 0755) || next;
221 chown($<, $(, $tmp_dir);
222 chmod(0755, $tmp_dir);
225 my @st = lstat($tmp_dir);
226 &error("Failed to create temp directory $tmp_dir : uid=$st[4] mode=$st[2]");
230 if (defined($_[0]) && $_[0] !~ /\.\./) {
231 $rv = "$tmp_dir/$_[0]";
234 $main::tempfilecount++;
236 $rv = $tmp_dir."/".int(rand(1000000))."_".
237 $main::tempfilecount."_".$scriptname;
242 =head2 transname([filename])
244 Behaves exactly like tempname, but records the temp file for deletion when the
245 current Webmin script process exits.
250 my $rv = &tempname(@_);
251 push(@main::temporary_files, $rv);
255 =head2 trunc(string, maxlen)
257 Truncates a string to the shortest whole word less than or equal to the
258 given width. Useful for word wrapping.
263 if (length($_[0]) <= $_[1]) {
266 my $str = substr($_[0],0,$_[1]);
275 =head2 indexof(string, value, ...)
277 Returns the index of some value in an array of values, or -1 if it was not
283 for(my $i=1; $i <= $#_; $i++) {
284 if ($_[$i] eq $_[0]) { return $i - 1; }
289 =head2 indexoflc(string, value, ...)
291 Like indexof, but does a case-insensitive match
296 my $str = lc(shift(@_));
297 my @arr = map { lc($_) } @_;
298 return &indexof($str, @arr);
301 =head2 sysprint(handle, [string]+)
303 Outputs some strings to a file handle, but bypassing IO buffering. Can be used
304 as a replacement for print when writing to pipes or sockets.
309 my $fh = &callers_package($_[0]);
310 my $str = join('', @_[1..$#_]);
311 syswrite $fh, $str, length($str);
314 =head2 check_ipaddress(ip)
316 Check if some IPv4 address is properly formatted, returning 1 if so or 0 if not.
321 return $_[0] =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/ &&
322 $1 >= 0 && $1 <= 255 &&
323 $2 >= 0 && $2 <= 255 &&
324 $3 >= 0 && $3 <= 255 &&
325 $4 >= 0 && $4 <= 255;
328 =head2 check_ip6address(ip)
330 Check if some IPv6 address is properly formatted, and returns 1 if so.
335 my @blocks = split(/:/, $_[0]);
336 return 0 if (@blocks == 0 || @blocks > 8);
338 # The address/netmask format is accepted. So we're looking for a "/" to isolate a possible netmask.
339 # After that, we delete the netmask to control the address only format, but we verify whether the netmask
340 # value is in [0;128].
342 my $where = index($blocks[$ib],"/");
345 my $b = substr($blocks[$ib],0,$where);
346 $m = substr($blocks[$ib],$where+1,length($blocks[$ib])-($where+1));
350 # The netmask must take its value in [0;128]
351 return 0 if ($m <0 || $m >128);
353 # Check the different blocks of the address : 16 bits block in hexa notation.
354 # Possibility of 1 empty block or 2 if the address begins with "::".
357 foreach $b (@blocks) {
358 return 0 if ($b ne "" && $b !~ /^[0-9a-f]{1,4}$/i);
359 $empty++ if ($b eq "");
361 return 0 if ($empty > 1 && !($_[0] =~ /^::/ && $empty == 2));
367 =head2 generate_icon(image, title, link, [href], [width], [height], [before-title], [after-title])
369 Prints HTML for an icon image. The parameters are :
371 =item image - URL for the image, like images/foo.gif
373 =item title - Text to appear under the icon
375 =item link - Optional destination for the icon's link
377 =item href - Other HTML attributes to be added to the <a href> for the link
379 =item width - Optional width of the icon
381 =item height - Optional height of the icon
383 =item before-title - HTML to appear before the title link, but which is not actually in the link
385 =item after-title - HTML to appear after the title link, but which is not actually in the link
390 &load_theme_library();
391 if (defined(&theme_generate_icon)) {
392 &theme_generate_icon(@_);
395 my $w = !defined($_[4]) ? "width=48" : $_[4] ? "width=$_[4]" : "";
396 my $h = !defined($_[5]) ? "height=48" : $_[5] ? "height=$_[5]" : "";
397 if ($tconfig{'noicons'}) {
399 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
402 print "$_[6]$_[1]$_[7]\n";
406 print "<table border><tr><td width=48 height=48>\n",
407 "<a href=\"$_[2]\" $_[3]><img src=\"$_[0]\" alt=\"\" border=0 ",
408 "$w $h></a></td></tr></table>\n";
409 print "$_[6]<a href=\"$_[2]\" $_[3]>$_[1]</a>$_[7]\n";
412 print "<table border><tr><td width=48 height=48>\n",
413 "<img src=\"$_[0]\" alt=\"\" border=0 $w $h>",
414 "</td></tr></table>\n$_[6]$_[1]$_[7]\n";
420 Converts a string to a form ok for putting in a URL, using % escaping.
426 $rv =~ s/([^A-Za-z0-9])/sprintf("%%%2.2X", ord($1))/ge;
430 =head2 un_urlize(string)
432 Converts a URL-encoded string to it's original contents - the reverse of the
440 $rv =~ s/%(..)/pack("c",hex($1))/ge;
444 =head2 include(filename)
446 Read and output the contents of the given file.
452 open(INCLUDE, &translate_filename($_[0])) || return 0;
460 =head2 copydata(in-handle, out-handle)
462 Read from one file handle and write to another, until there is no more to read.
468 $in = &callers_package($in);
469 $out = &callers_package($out);
471 while(read($in, $buf, 1024) > 0) {
472 (print $out $buf) || return 0;
477 =head2 ReadParseMime([maximum], [&cbfunc, &cbargs])
479 Read data submitted via a POST request using the multipart/form-data coding,
480 and store it in the global %in hash. The optional parameters are :
482 =item maximum - If the number of bytes of input exceeds this number, stop reading and call error.
484 =item cbfunc - A function reference to call after reading each block of data.
486 =item cbargs - Additional parameters to the callback function.
491 my ($max, $cbfunc, $cbargs) = @_;
492 my ($boundary, $line, $foo, $name, $got, $file);
493 my $err = &text('readparse_max', $max);
494 $ENV{'CONTENT_TYPE'} =~ /boundary=(.*)$/ || &error($text{'readparse_enc'});
495 if ($ENV{'CONTENT_LENGTH'} && $max && $ENV{'CONTENT_LENGTH'} > $max) {
498 &$cbfunc(0, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
500 <STDIN>; # skip first boundary
503 # Read section headers
507 $got += length($line);
508 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, @$cbargs) if ($cbfunc);
509 if ($max && $got > $max) {
514 if ($line =~ /^(\S+):\s*(.*)$/) {
515 $header{$lastheader = lc($1)} = $2;
517 elsif ($line =~ /^\s+(.*)$/) {
518 $header{$lastheader} .= $line;
522 # Parse out filename and type
523 if ($header{'content-disposition'} =~ /^form-data(.*)/) {
525 while ($rest =~ /([a-zA-Z]*)=\"([^\"]*)\"(.*)/) {
530 $foo = $name . "_$1";
537 &error($text{'readparse_cdheader'});
539 if ($header{'content-type'} =~ /^([^\s;]+)/) {
540 $foo = $name . "_content_type";
543 $file = $in{$name."_filename"};
546 $in{$name} .= "\0" if (defined($in{$name}));
549 $got += length($line);
550 &$cbfunc($got, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
552 if ($max && $got > $max) {
553 #print STDERR "over limit of $max\n";
558 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs)
563 $ptline =~ s/[^a-zA-Z0-9\-]/\./g;
564 if (index($line, $boundary) != -1) { last; }
567 chop($in{$name}); chop($in{$name});
568 if (index($line,"$boundary--") != -1) { last; }
570 &$cbfunc(-1, $ENV{'CONTENT_LENGTH'}, $file, @$cbargs) if ($cbfunc);
573 =head2 ReadParse([&hash], [method], [noplus])
575 Fills the given hash reference with CGI parameters, or uses the global hash
576 %in if none is given. Also sets the global variables $in and @in. The other
579 =item method - For use of this HTTP method, such as GET
581 =item noplus - Don't convert + in parameters to spaces.
586 my $a = $_[0] || \%in;
588 my $meth = $_[1] ? $_[1] : $ENV{'REQUEST_METHOD'};
590 if ($meth eq 'POST') {
591 my $clen = $ENV{'CONTENT_LENGTH'};
592 &read_fully(STDIN, \$in, $clen) == $clen ||
593 &error("Failed to read POST input : $!");
595 if ($ENV{'QUERY_STRING'}) {
596 if ($in) { $in .= "&".$ENV{'QUERY_STRING'}; }
597 else { $in = $ENV{'QUERY_STRING'}; }
599 @in = split(/\&/, $in);
600 foreach my $i (@in) {
601 my ($k, $v) = split(/=/, $i, 2);
606 $k =~ s/%(..)/pack("c",hex($1))/ge;
607 $v =~ s/%(..)/pack("c",hex($1))/ge;
608 $a->{$k} = defined($a->{$k}) ? $a->{$k}."\0".$v : $v;
612 =head2 read_fully(fh, &buffer, length)
614 Read data from some file handle up to the given length, even in the face
615 of partial reads. Reads the number of bytes read. Stores received data in the
616 string pointed to be the buffer reference.
621 my ($fh, $buf, $len) = @_;
622 $fh = &callers_package($fh);
625 my $r = read(STDIN, $$buf, $len-$got, $got);
632 =head2 read_parse_mime_callback(size, totalsize, upload-id)
634 Called by ReadParseMime as new data arrives from a form-data POST. Only updates
635 the file on every 1% change though. For internal use by the upload progress
639 sub read_parse_mime_callback
641 my ($size, $totalsize, $filename, $id) = @_;
642 return if ($gconfig{'no_upload_tracker'});
645 # Create the upload tracking directory - if running as non-root, this has to
646 # be under the user's home
649 my @uinfo = @remote_user_info ? @remote_user_info : getpwuid($<);
650 $vardir = "$uinfo[7]/.tmp";
653 $vardir = $ENV{'WEBMIN_VAR'};
656 &make_dir($vardir, 0755);
659 # Remove any upload.* files more than 1 hour old
660 if (!$main::read_parse_mime_callback_flushed) {
662 opendir(UPDIR, $vardir);
663 foreach my $f (readdir(UPDIR)) {
664 next if ($f !~ /^upload\./);
665 my @st = stat("$vardir/$f");
666 if ($st[9] < $now-3600) {
667 unlink("$vardir/$f");
671 $main::read_parse_mime_callback_flushed++;
674 # Only update file once per percent
675 my $upfile = "$vardir/upload.$id";
676 if ($totalsize && $size >= 0) {
677 my $pc = int(100 * $size / $totalsize);
678 if ($pc <= $main::read_parse_mime_callback_pc{$upfile}) {
681 $main::read_parse_mime_callback_pc{$upfile} = $pc;
685 &open_tempfile(UPFILE, ">$upfile");
686 print UPFILE $size,"\n";
687 print UPFILE $totalsize,"\n";
688 print UPFILE $filename,"\n";
689 &close_tempfile(UPFILE);
692 =head2 read_parse_mime_javascript(upload-id, [&fields])
694 Returns an onSubmit= Javascript statement to popup a window for tracking
695 an upload with the given ID. For internal use by the upload progress tracker.
698 sub read_parse_mime_javascript
700 my ($id, $fields) = @_;
701 return "" if ($gconfig{'no_upload_tracker'});
702 my $opener = "window.open(\"$gconfig{'webprefix'}/uptracker.cgi?id=$id&uid=$<\", \"uptracker\", \"toolbar=no,menubar=no,scrollbars=no,width=500,height=100\");";
704 my $if = join(" || ", map { "typeof($_) != \"undefined\" && $_.value != \"\"" } @$fields);
705 return "onSubmit='if ($if) { $opener }'";
708 return "onSubmit='$opener'";
712 =head2 PrintHeader(charset)
714 Outputs the HTTP headers for an HTML page. The optional charset parameter
715 can be used to set a character set. Normally this function is not called
716 directly, but is rather called by ui_print_header or header.
721 if ($pragma_no_cache || $gconfig{'pragma_no_cache'}) {
722 print "pragma: no-cache\n";
723 print "Expires: Thu, 1 Jan 1970 00:00:00 GMT\n";
724 print "Cache-Control: no-store, no-cache, must-revalidate\n";
725 print "Cache-Control: post-check=0, pre-check=0\n";
727 if (defined($_[0])) {
728 print "Content-type: text/html; Charset=$_[0]\n\n";
731 print "Content-type: text/html\n\n";
735 =head2 header(title, image, [help], [config], [nomodule], [nowebmin], [rightside], [head-stuff], [body-stuff], [below])
737 Outputs a Webmin HTML page header with a title, including HTTP headers. The
740 =item title - The text to show at the top of the page
742 =item image - An image to show instead of the title text. This is typically left blank.
744 =item help - If set, this is the name of a help page that will be linked to in the title.
746 =item config - If set to 1, the title will contain a link to the module's config page.
748 =item nomodule - If set to 1, there will be no link in the title section to the module's index.
750 =item nowebmin - If set to 1, there will be no link in the title section to the Webmin index.
752 =item rightside - HTML to be shown on the right-hand side of the title. Can contain multiple lines, separated by <br>. Typically this is used for links to stop, start or restart servers.
754 =item head-stuff - HTML to be included in the <head> section of the page.
756 =item body-stuff - HTML attributes to be include in the <body> tag.
758 =item below - HTML to be displayed below the title. Typically this is used for application or server version information.
763 return if ($main::done_webmin_header++);
765 my $charset = defined($main::force_charset) ? $main::force_charset
767 &PrintHeader($charset);
768 &load_theme_library();
769 if (defined(&theme_header)) {
770 $module_name = &get_module_name();
774 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
777 if (defined(&theme_prehead)) {
781 print "<meta http-equiv=\"Content-Type\" ",
782 "content=\"text/html; Charset="."e_escape($charset)."\">\n";
785 my $title = &get_html_title($_[0]);
786 print "<title>$title</title>\n";
787 print $_[7] if ($_[7]);
788 print &get_html_status_line(0);
790 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
791 if ($tconfig{'headinclude'}) {
792 print &read_file_contents(
793 "$theme_root_directory/$tconfig{'headinclude'}");
796 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
797 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
798 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
799 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
800 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
801 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
802 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
804 my $dir = $current_lang_info->{'dir'} ? "dir=\"$current_lang_info->{'dir'}\""
806 print "<body bgcolor=#$bgcolor link=#$link vlink=#$link text=#$text ",
807 "$bgimage $tconfig{'inbody'} $dir $_[8]>\n";
808 if (defined(&theme_prebody)) {
811 my $hostname = &get_display_hostname();
812 my $version = &get_webmin_version();
813 my $prebody = $tconfig{'prebody'};
815 $prebody =~ s/%HOSTNAME%/$hostname/g;
816 $prebody =~ s/%VERSION%/$version/g;
817 $prebody =~ s/%USER%/$remote_user/g;
818 $prebody =~ s/%OS%/$os_type $os_version/g;
821 if ($tconfig{'prebodyinclude'}) {
823 open(INC, "$theme_root_directory/$tconfig{'prebodyinclude'}");
830 print $tconfig{'preheader'};
831 my %this_module_info = &get_module_info(&get_module_name());
832 print "<table class='header' width=100%><tr>\n";
833 if ($gconfig{'sysinfo'} == 2 && $remote_user) {
834 print "<td id='headln1' colspan=3 align=center>\n";
835 print &get_html_status_line(1);
836 print "</td></tr> <tr>\n";
838 print "<td id='headln2l' width=15% valign=top align=left>";
839 if ($ENV{'HTTP_WEBMIN_SERVERS'} && !$tconfig{'framed'}) {
840 print "<a href='$ENV{'HTTP_WEBMIN_SERVERS'}'>",
841 "$text{'header_servers'}</a><br>\n";
843 if (!$_[5] && !$tconfig{'noindex'}) {
844 my @avail = &get_available_module_infos(1);
845 my $nolo = $ENV{'ANONYMOUS_USER'} ||
846 $ENV{'SSL_USER'} || $ENV{'LOCAL_USER'} ||
847 $ENV{'HTTP_USER_AGENT'} =~ /webmin/i;
848 if ($gconfig{'gotoone'} && $main::session_id && @avail == 1 &&
850 print "<a href='$gconfig{'webprefix'}/session_login.cgi?logout=1'>",
851 "$text{'main_logout'}</a><br>";
853 elsif ($gconfig{'gotoone'} && @avail == 1 && !$nolo) {
854 print "<a href=$gconfig{'webprefix'}/switch_user.cgi>",
855 "$text{'main_switch'}</a><br>";
857 elsif (!$gconfig{'gotoone'} || @avail > 1) {
858 print "<a href='$gconfig{'webprefix'}/?cat=",
859 $this_module_info{'category'},
860 "'>$text{'header_webmin'}</a><br>\n";
863 if (!$_[4] && !$tconfig{'nomoduleindex'}) {
864 my $idx = $this_module_info{'index_link'};
865 my $mi = $module_index_link || "/".&get_module_name()."/$idx";
866 my $mt = $module_index_name || $text{'header_module'};
867 print "<a href=\"$gconfig{'webprefix'}$mi\">$mt</a><br>\n";
869 if (ref($_[2]) eq "ARRAY" && !$ENV{'ANONYMOUS_USER'} &&
870 !$tconfig{'nohelp'}) {
871 print &hlink($text{'header_help'}, $_[2]->[0], $_[2]->[1]),
874 elsif (defined($_[2]) && !$ENV{'ANONYMOUS_USER'} &&
875 !$tconfig{'nohelp'}) {
876 print &hlink($text{'header_help'}, $_[2]),"<br>\n";
879 my %access = &get_module_acl();
880 if (!$access{'noconfig'} && !$config{'noprefs'}) {
881 my $cprog = $user_module_config_directory ?
882 "uconfig.cgi" : "config.cgi";
883 print "<a href=\"$gconfig{'webprefix'}/$cprog?",
884 &get_module_name()."\">",
885 $text{'header_config'},"</a><br>\n";
890 # Title is a single image
891 print "<td id='headln2c' align=center width=70%>",
892 "<img alt=\"$_[0]\" src=\"$_[1]\"></td>\n";
896 my $ts = defined($tconfig{'titlesize'}) ?
897 $tconfig{'titlesize'} : "+2";
898 print "<td id='headln2c' align=center width=70%>",
899 ($ts ? "<font size=$ts>" : ""),$_[0],
900 ($ts ? "</font>" : "");
901 print "<br>$_[9]\n" if ($_[9]);
904 print "<td id='headln2r' width=15% valign=top align=right>";
906 print "</td></tr></table>\n";
907 print $tconfig{'postheader'};
911 =head2 get_html_title(title)
913 Returns the full string to appear in the HTML <title> block.
920 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
921 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
922 my $host = &get_display_hostname();
923 if ($gconfig{'sysinfo'} == 1 && $remote_user) {
924 $title = sprintf "%s : %s on %s (%s %s)\n",
925 $msg, $remote_user, $host,
926 $os_type, $os_version;
928 elsif ($gconfig{'sysinfo'} == 4 && $remote_user) {
929 $title = sprintf "%s on %s (%s %s)\n",
931 $os_type, $os_version;
936 if ($gconfig{'showlogin'} && $remote_user) {
937 $title = $remote_user.($title ? " : ".$title : "");
939 if ($gconfig{'showhost'}) {
940 $title = $host.($title ? " : ".$title : "");
945 =head2 get_html_framed_title
947 Returns the title text for a framed theme main page.
950 sub get_html_framed_title
953 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
954 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
956 if (($gconfig{'sysinfo'} == 4 || $gconfig{'sysinfo'} == 1) && $remote_user) {
957 # Alternate title mode requested
958 $title = sprintf "%s on %s (%s %s)\n",
959 $remote_user, &get_display_hostname(),
960 $os_type, $os_version;
963 # Title like 'Webmin x.yy on hostname (Linux 6)'
964 if ($os_version eq "*") {
968 $ostr = "$os_type $os_version";
970 my $host = &get_display_hostname();
971 my $ver = &get_webmin_version();
972 $title = $gconfig{'nohostname'} ? $text{'main_title2'} :
973 $gconfig{'showhost'} ? &text('main_title3', $ver, $ostr) :
974 &text('main_title', $ver, $host, $ostr);
975 if ($gconfig{'showlogin'}) {
976 $title = $remote_user.($title ? " : ".$title : "");
978 if ($gconfig{'showhost'}) {
979 $title = $host.($title ? " : ".$title : "");
985 =head2 get_html_status_line(text-only)
987 Returns HTML for a script block that sets the status line, or if text-only
988 is set to 1, just return the status line text.
991 sub get_html_status_line
994 if (($gconfig{'sysinfo'} != 0 || !$remote_user) && !$textonly) {
995 # Disabled in this mode
998 my $os_type = $gconfig{'real_os_type'} || $gconfig{'os_type'};
999 my $os_version = $gconfig{'real_os_version'} || $gconfig{'os_version'};
1000 my $line = &text('header_statusmsg',
1001 ($ENV{'ANONYMOUS_USER'} ? "Anonymous user"
1003 ($ENV{'SSL_USER'} ? " (SSL certified)" :
1004 $ENV{'LOCAL_USER'} ? " (Local user)" : ""),
1005 $text{'programname'},
1006 &get_webmin_version(),
1007 &get_display_hostname(),
1008 $os_type.($os_version eq "*" ? "" :" $os_version"));
1013 $line =~ s/\r|\n//g;
1014 return "<script language=JavaScript type=text/javascript>\n".
1015 "defaultStatus=\""."e_escape($line)."\";\n".
1020 =head2 popup_header([title], [head-stuff], [body-stuff], [no-body])
1022 Outputs a page header, suitable for a popup window. If no title is given,
1023 absolutely no decorations are output. Also useful in framesets. The parameters
1026 =item title - Title text for the popup window.
1028 =item head-stuff - HTML to appear in the <head> section.
1030 =item body-stuff - HTML attributes to be include in the <body> tag.
1032 =item no-body - If set to 1, don't generate a body tag
1037 return if ($main::done_webmin_header++);
1039 my $charset = defined($main::force_charset) ? $main::force_charset
1041 &PrintHeader($charset);
1042 &load_theme_library();
1043 if (defined(&theme_popup_header)) {
1044 &theme_popup_header(@_);
1047 print "<!doctype html public \"-//W3C//DTD HTML 3.2 Final//EN\">\n";
1050 if (defined(&theme_popup_prehead)) {
1051 &theme_popup_prehead(@_);
1053 print "<title>$_[0]</title>\n";
1055 print "$tconfig{'headhtml'}\n" if ($tconfig{'headhtml'});
1056 if ($tconfig{'headinclude'}) {
1057 print &read_file_contents(
1058 "$theme_root_directory/$tconfig{'headinclude'}");
1061 my $bgcolor = defined($tconfig{'cs_page'}) ? $tconfig{'cs_page'} :
1062 defined($gconfig{'cs_page'}) ? $gconfig{'cs_page'} : "ffffff";
1063 my $link = defined($tconfig{'cs_link'}) ? $tconfig{'cs_link'} :
1064 defined($gconfig{'cs_link'}) ? $gconfig{'cs_link'} : "0000ee";
1065 my $text = defined($tconfig{'cs_text'}) ? $tconfig{'cs_text'} :
1066 defined($gconfig{'cs_text'}) ? $gconfig{'cs_text'} : "000000";
1067 my $bgimage = defined($tconfig{'bgimage'}) ? "background=$tconfig{'bgimage'}"
1070 print "<body id='popup' bgcolor=#$bgcolor link=#$link vlink=#$link ",
1071 "text=#$text $bgimage $tconfig{'inbody'} $_[2]>\n";
1072 if (defined(&theme_popup_prebody)) {
1073 &theme_popup_prebody(@_);
1078 =head2 footer([page, name]+, [noendbody])
1080 Outputs the footer for a Webmin HTML page, possibly with links back to other
1081 pages. The links are specified by pairs of parameters, the first of which is
1082 a link destination, and the second the link text. For example :
1084 footer('/', 'Webmin index', '', 'Module menu');
1089 &load_theme_library();
1090 my %this_module_info = &get_module_info(&get_module_name());
1091 if (defined(&theme_footer)) {
1092 $module_name = &get_module_name(); # Old themes use these
1093 %module_info = %this_module_info;
1097 for(my $i=0; $i+1<@_; $i+=2) {
1099 if ($url ne '/' || !$tconfig{'noindex'}) {
1101 $url = "/?cat=$this_module_info{'category'}";
1103 elsif ($url eq '' && &get_module_name()) {
1104 $url = "/".&get_module_name()."/".
1105 $this_module_info{'index_link'};
1107 elsif ($url =~ /^\?/ && &get_module_name()) {
1108 $url = "/".&get_module_name()."/$url";
1110 $url = "$gconfig{'webprefix'}$url" if ($url =~ /^\//);
1112 print "<a href=\"$url\"><img alt=\"<-\" align=middle border=0 src=$gconfig{'webprefix'}/images/left.gif></a>\n";
1117 print " <a href=\"$url\">",&text('main_return', $_[$i+1]),"</a>\n";
1122 my $postbody = $tconfig{'postbody'};
1124 my $hostname = &get_display_hostname();
1125 my $version = &get_webmin_version();
1126 my $os_type = $gconfig{'real_os_type'} ||
1127 $gconfig{'os_type'};
1128 my $os_version = $gconfig{'real_os_version'} ||
1129 $gconfig{'os_version'};
1130 $postbody =~ s/%HOSTNAME%/$hostname/g;
1131 $postbody =~ s/%VERSION%/$version/g;
1132 $postbody =~ s/%USER%/$remote_user/g;
1133 $postbody =~ s/%OS%/$os_type $os_version/g;
1134 print "$postbody\n";
1136 if ($tconfig{'postbodyinclude'}) {
1138 open(INC, "$theme_root_directory/$tconfig{'postbodyinclude'}");
1144 if (defined(&theme_postbody)) {
1145 &theme_postbody(@_);
1147 print "</body></html>\n";
1151 =head2 popup_footer([no-body])
1153 Outputs html for a footer for a popup window, started by popup_header.
1158 &load_theme_library();
1159 if (defined(&theme_popup_footer)) {
1160 &theme_popup_footer(@_);
1169 =head2 load_theme_library
1171 Immediately loads the current theme's theme.pl file. Not generally useful for
1172 most module developers, as this is called automatically by the header function.
1175 sub load_theme_library
1177 return if (!$current_theme || $loaded_theme_library++);
1178 for(my $i=0; $i<@theme_root_directories; $i++) {
1179 if ($theme_configs[$i]->{'functions'}) {
1180 do $theme_root_directories[$i]."/".
1181 $theme_configs[$i]->{'functions'};
1186 =head2 redirect(url)
1188 Output HTTP headers to redirect the browser to some page. The url parameter is
1189 typically a relative URL like index.cgi or list_users.cgi.
1194 my $port = $ENV{'SERVER_PORT'} == 443 && uc($ENV{'HTTPS'}) eq "ON" ? "" :
1195 $ENV{'SERVER_PORT'} == 80 && uc($ENV{'HTTPS'}) ne "ON" ? "" :
1196 ":$ENV{'SERVER_PORT'}";
1197 my $prot = uc($ENV{'HTTPS'}) eq "ON" ? "https" : "http";
1198 my $wp = $gconfig{'webprefixnoredir'} ? undef : $gconfig{'webprefix'};
1200 if ($_[0] =~ /^(http|https|ftp|gopher):/) {
1201 # Absolute URL (like http://...)
1204 elsif ($_[0] =~ /^\//) {
1205 # Absolute path (like /foo/bar.cgi)
1206 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$_[0]";
1208 elsif ($ENV{'SCRIPT_NAME'} =~ /^(.*)\/[^\/]*$/) {
1209 # Relative URL (like foo.cgi)
1210 $url = "$prot://$ENV{'SERVER_NAME'}$port$wp$1/$_[0]";
1213 $url = "$prot://$ENV{'SERVER_NAME'}$port/$wp$_[0]";
1215 &load_theme_library();
1216 if (defined(&theme_redirect)) {
1217 $module_name = &get_module_name(); # Old themes use these
1218 %module_info = &get_module_info($module_name);
1219 &theme_redirect($_[0], $url);
1222 print "Location: $url\n\n";
1226 =head2 kill_byname(name, signal)
1228 Finds a process whose command line contains the given name (such as httpd), and
1229 sends some signal to it. The signal can be numeric (like 9) or named
1235 my @pids = &find_byname($_[0]);
1236 return scalar(@pids) if (&is_readonly_mode());
1237 &webmin_debug_log('KILL', "signal=$_[1] name=$_[0]")
1238 if ($gconfig{'debug_what_procs'});
1239 if (@pids) { kill($_[1], @pids); return scalar(@pids); }
1243 =head2 kill_byname_logged(name, signal)
1245 Like kill_byname, but also logs the killing.
1248 sub kill_byname_logged
1250 my @pids = &find_byname($_[0]);
1251 return scalar(@pids) if (&is_readonly_mode());
1252 if (@pids) { &kill_logged($_[1], @pids); return scalar(@pids); }
1256 =head2 find_byname(name)
1258 Finds processes searching for the given name in their command lines, and
1259 returns a list of matching PIDs.
1264 if ($gconfig{'os_type'} =~ /-linux$/ && -r "/proc/$$/cmdline") {
1265 # Linux with /proc filesystem .. use cmdline files, as this is
1266 # faster than forking
1268 opendir(PROCDIR, "/proc");
1269 foreach my $f (readdir(PROCDIR)) {
1270 if ($f eq int($f) && $f != $$) {
1271 my $line = &read_file_contents("/proc/$f/cmdline");
1272 if ($line =~ /$_[0]/) {
1281 if (&foreign_check("proc")) {
1282 # Call the proc module
1283 &foreign_require("proc", "proc-lib.pl");
1284 if (defined(&proc::list_processes)) {
1285 my @procs = &proc::list_processes();
1287 foreach my $p (@procs) {
1288 if ($p->{'args'} =~ /$_[0]/) {
1289 push(@pids, $p->{'pid'});
1292 @pids = grep { $_ != $$ } @pids;
1297 # Fall back to running a command
1299 $cmd = $gconfig{'find_pid_command'};
1300 $cmd =~ s/NAME/"$_[0]"/g;
1301 $cmd = &translate_command($cmd);
1302 @pids = split(/\n/, `($cmd) <$null_file 2>$null_file`);
1303 @pids = grep { $_ != $$ } @pids;
1307 =head2 error([message]+)
1309 Display an error message and exit. This should be used by CGI scripts that
1310 encounter a fatal error or invalid user input to notify users of the problem.
1311 If error_setup has been called, the displayed error message will be prefixed
1312 by the message setup using that function.
1317 $main::no_miniserv_userdb = 1;
1318 my $msg = join("", @_);
1319 $msg =~ s/<[^>]*>//g;
1320 if (!$main::error_must_die) {
1321 print STDERR "Error: ",$msg,"\n";
1323 &load_theme_library();
1324 if ($main::error_must_die) {
1325 if ($gconfig{'error_stack'}) {
1326 print STDERR "Error: ",$msg,"\n";
1327 for(my $i=0; my @stack = caller($i); $i++) {
1328 print STDERR "File: $stack[1] Line: $stack[2] ",
1329 "Function: $stack[3]\n";
1334 elsif (!$ENV{'REQUEST_METHOD'}) {
1335 # Show text-only error
1336 print STDERR "$text{'error'}\n";
1337 print STDERR "-----\n";
1338 print STDERR ($main::whatfailed ? "$main::whatfailed : " : ""),
1340 print STDERR "-----\n";
1341 if ($gconfig{'error_stack'}) {
1343 print STDERR $text{'error_stack'},"\n";
1344 for(my $i=0; my @stack = caller($i); $i++) {
1345 print STDERR &text('error_stackline',
1346 $stack[1], $stack[2], $stack[3]),"\n";
1351 elsif (defined(&theme_error)) {
1355 &header($text{'error'}, "");
1357 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),
1359 if ($gconfig{'error_stack'}) {
1361 print "<h3>$text{'error_stack'}</h3>\n";
1363 print "<tr> <td><b>$text{'error_file'}</b></td> ",
1364 "<td><b>$text{'error_line'}</b></td> ",
1365 "<td><b>$text{'error_sub'}</b></td> </tr>\n";
1366 for($i=0; my @stack = caller($i); $i++) {
1368 print "<td>$stack[1]</td>\n";
1369 print "<td>$stack[2]</td>\n";
1370 print "<td>$stack[3]</td>\n";
1376 if ($ENV{'HTTP_REFERER'} && $main::completed_referers_check) {
1377 &footer($ENV{'HTTP_REFERER'}, $text{'error_previous'});
1383 &unlock_all_files();
1384 &cleanup_tempnames();
1388 =head2 popup_error([message]+)
1390 This function is almost identical to error, but displays the message with HTML
1391 headers suitable for a popup window.
1396 $main::no_miniserv_userdb = 1;
1397 &load_theme_library();
1398 if ($main::error_must_die) {
1401 elsif (defined(&theme_popup_error)) {
1402 &theme_popup_error(@_);
1405 &popup_header($text{'error'}, "");
1406 print "<h3>",($main::whatfailed ? "$main::whatfailed : " : ""),@_,"</h3>\n";
1409 &unlock_all_files();
1410 &cleanup_tempnames();
1414 =head2 error_setup(message)
1416 Registers a message to be prepended to all error messages displayed by the
1422 $main::whatfailed = $_[0];
1425 =head2 wait_for(handle, regexp, regexp, ...)
1427 Reads from the input stream until one of the regexps matches, and returns the
1428 index of the matching regexp, or -1 if input ended before any matched. This is
1429 very useful for parsing the output of interactive programs, and can be used with
1430 a two-way pipe to feed input to a program in response to output matched by
1433 If the matching regexp contains bracketed sub-expressions, their values will
1434 be placed in the global array @matches, indexed starting from 1. You cannot
1435 use the Perl variables $1, $2 and so on to capture matches.
1439 $rv = wait_for($loginfh, "username:");
1441 error("Didn't get username prompt");
1443 print $loginfh "joe\n";
1444 $rv = wait_for($loginfh, "password:");
1446 error("Didn't get password prompt");
1448 print $loginfh "smeg\n";
1453 my ($c, $i, $sw, $rv, $ha);
1454 undef($wait_for_input);
1455 if ($wait_for_debug) {
1456 print STDERR "wait_for(",join(",", @_),")\n";
1458 $ha = &callers_package($_[0]);
1459 if ($wait_for_debug) {
1460 print STDERR "File handle=$ha fd=",fileno($ha),"\n";
1465 " if ((\$c = getc(\$ha)) eq \"\") { return -1; }\n".
1466 " \$wait_for_input .= \$c;\n";
1467 if ($wait_for_debug) {
1468 $codes .= "print STDERR \$wait_for_input,\"\\n\";";
1470 for($i=1; $i<@_; $i++) {
1471 $sw = $i>1 ? "elsif" : "if";
1472 $codes .= " $sw (\$wait_for_input =~ /$_[$i]/i) { \$hit = $i-1; }\n";
1475 " if (defined(\$hit)) {\n".
1476 " \@matches = (-1, \$1, \$2, \$3, \$4, \$5, \$6, \$7, \$8, \$9);\n".
1482 &error("wait_for error : $@\n");
1487 =head2 fast_wait_for(handle, string, string, ...)
1489 This function behaves very similar to wait_for (documented above), but instead
1490 of taking regular expressions as parameters, it takes strings. As soon as the
1491 input contains one of them, it will return the index of the matching string.
1492 If the input ends before any match, it returns -1.
1497 my ($inp, $maxlen, $ha, $i, $c, $inpl);
1498 for($i=1; $i<@_; $i++) {
1499 $maxlen = length($_[$i]) > $maxlen ? length($_[$i]) : $maxlen;
1503 if (($c = getc($ha)) eq "") {
1504 &error("fast_wait_for read error : $!");
1507 if (length($inp) > $maxlen) {
1508 $inp = substr($inp, length($inp)-$maxlen);
1510 $inpl = length($inp);
1511 for($i=1; $i<@_; $i++) {
1512 if ($_[$i] eq substr($inp, $inpl-length($_[$i]))) {
1519 =head2 has_command(command)
1521 Returns the full path to the executable if some command is in the path, or
1522 undef if not found. If the given command is already an absolute path and
1523 exists, then the same path will be returned.
1528 if (!$_[0]) { return undef; }
1529 if (exists($main::has_command_cache{$_[0]})) {
1530 return $main::has_command_cache{$_[0]};
1533 my $slash = $gconfig{'os_type'} eq 'windows' ? '\\' : '/';
1534 if ($_[0] =~ /^\// || $_[0] =~ /^[a-z]:[\\\/]/i) {
1535 # Absolute path given - just use it
1536 my $t = &translate_filename($_[0]);
1537 $rv = (-x $t && !-d _) ? $_[0] : undef;
1540 # Check each directory in the path
1542 foreach my $d (split($path_separator, $ENV{'PATH'})) {
1543 next if ($donedir{$d}++);
1544 $d =~ s/$slash$// if ($d ne $slash);
1545 my $t = &translate_filename("$d/$_[0]");
1546 if (-x $t && !-d _) {
1547 $rv = $d.$slash.$_[0];
1550 if ($gconfig{'os_type'} eq 'windows') {
1551 foreach my $sfx (".exe", ".com", ".bat") {
1552 my $t = &translate_filename("$d/$_[0]").$sfx;
1553 if (-r $t && !-d _) {
1554 $rv = $d.$slash.$_[0].$sfx;
1561 $main::has_command_cache{$_[0]} = $rv;
1565 =head2 make_date(seconds, [date-only], [fmt])
1567 Converts a Unix date/time in seconds to a human-readable form, by default
1568 formatted like dd/mmm/yyyy hh:mm:ss. Parameters are :
1570 =item seconds - Unix time is seconds to convert.
1572 =item date-only - If set to 1, exclude the time from the returned string.
1574 =item fmt - Optional, one of dd/mon/yyyy, dd/mm/yyyy, mm/dd/yyyy or yyyy/mm/dd
1579 my ($secs, $only, $fmt) = @_;
1580 my @tm = localtime($secs);
1583 $fmt = $gconfig{'dateformat'} || 'dd/mon/yyyy';
1585 if ($fmt eq 'dd/mon/yyyy') {
1586 $date = sprintf "%2.2d/%s/%4.4d",
1587 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1589 elsif ($fmt eq 'dd/mm/yyyy') {
1590 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1592 elsif ($fmt eq 'mm/dd/yyyy') {
1593 $date = sprintf "%2.2d/%2.2d/%4.4d", $tm[4]+1, $tm[3], $tm[5]+1900;
1595 elsif ($fmt eq 'yyyy/mm/dd') {
1596 $date = sprintf "%4.4d/%2.2d/%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1598 elsif ($fmt eq 'd. mon yyyy') {
1599 $date = sprintf "%d. %s %4.4d",
1600 $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900;
1602 elsif ($fmt eq 'dd.mm.yyyy') {
1603 $date = sprintf "%2.2d.%2.2d.%4.4d", $tm[3], $tm[4]+1, $tm[5]+1900;
1605 elsif ($fmt eq 'yyyy-mm-dd') {
1606 $date = sprintf "%4.4d-%2.2d-%2.2d", $tm[5]+1900, $tm[4]+1, $tm[3];
1609 $date .= sprintf " %2.2d:%2.2d", $tm[2], $tm[1];
1614 =head2 file_chooser_button(input, type, [form], [chroot], [addmode])
1616 Return HTML for a button that pops up a file chooser when clicked, and places
1617 the selected filename into another HTML field. The parameters are :
1619 =item input - Name of the form field to store the filename in.
1621 =item type - 0 for file or directory chooser, or 1 for directory only.
1623 =item form - Index of the form containing the button.
1625 =item chroot - If set to 1, the chooser will be limited to this directory.
1627 =item addmode - If set to 1, the selected filename will be appended to the text box instead of replacing it's contents.
1630 sub file_chooser_button
1632 return &theme_file_chooser_button(@_)
1633 if (defined(&theme_file_chooser_button));
1634 my $form = defined($_[2]) ? $_[2] : 0;
1635 my $chroot = defined($_[3]) ? $_[3] : "/";
1636 my $add = int($_[4]);
1637 my ($w, $h) = (400, 300);
1638 if ($gconfig{'db_sizefile'}) {
1639 ($w, $h) = split(/x/, $gconfig{'db_sizefile'});
1641 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";
1644 =head2 popup_window_button(url, width, height, scrollbars?, &field-mappings)
1646 Returns HTML for a button that will popup a chooser window of some kind. The
1649 =item url - Base URL of the popup window's contents
1651 =item width - Width of the window in pixels
1653 =item height - Height in pixels
1655 =item scrollbars - Set to 1 if the window should have scrollbars
1657 The field-mappings parameter is an array ref of array refs containing
1659 =item - Attribute to assign field to in the popup window
1661 =item - Form field name
1663 =item - CGI parameter to URL for value, if any
1666 sub popup_window_button
1668 return &theme_popup_window_button(@_) if (defined(&theme_popup_window_button));
1669 my ($url, $w, $h, $scroll, $fields) = @_;
1670 my $scrollyn = $scroll ? "yes" : "no";
1671 my $rv = "<input type=button onClick='";
1672 foreach my $m (@$fields) {
1673 $rv .= "$m->[0] = form.$m->[1]; ";
1675 my $sep = $url =~ /\?/ ? "&" : "?";
1676 $rv .= "chooser = window.open(\"$url\"";
1677 foreach my $m (@$fields) {
1679 $rv .= "+\"$sep$m->[2]=\"+escape($m->[0].value)";
1683 $rv .= ", \"chooser\", \"toolbar=no,menubar=no,scrollbars=$scrollyn,resizable=yes,width=$w,height=$h\"); ";
1684 foreach my $m (@$fields) {
1685 $rv .= "chooser.$m->[0] = $m->[0]; ";
1686 $rv .= "window.$m->[0] = $m->[0]; ";
1688 $rv .= "' value=\"...\">";
1692 =head2 read_acl(&user-module-hash, &user-list-hash)
1694 Reads the Webmin acl file into the given hash references. The first is indexed
1695 by a combined key of username,module , with the value being set to 1 when
1696 the user has access to that module. The second is indexed by username, with
1697 the value being an array ref of allowed modules.
1699 This function is deprecated in favour of foreign_available, which performs a
1700 more comprehensive check of module availability.
1705 if (!%main::acl_hash_cache) {
1706 # Read from local files
1708 open(ACL, &acl_filename());
1710 if (/^([^:]+):\s*(.*)/) {
1712 my @mods = split(/\s+/, $2);
1713 foreach my $m (@mods) {
1714 $main::acl_hash_cache{$user,$m}++;
1716 $main::acl_array_cache{$user} = \@mods;
1722 my $userdb = &get_userdb_string();
1723 my ($dbh, $proto, $prefix, $args) =
1724 $userdb ? &connect_userdb($userdb) : ( );
1726 if ($proto eq "mysql" || $proto eq "postgresql") {
1727 # Select usernames and modules from SQL DB
1728 my $cmd = $dbh->prepare("select webmin_user.name,webmin_user_attr.value from webmin_user,webmin_user_attr where webmin_user.id = webmin_user_attr.id and webmin_user_attr.attr = 'modules'");
1729 if ($cmd && $cmd->execute()) {
1730 while(my ($user, $mods) = $cmd->fetchrow()) {
1731 my @mods = split(/\s+/, $mods);
1732 foreach my $m (@mods) {
1733 $main::acl_hash_cache{$user,
1736 $main::acl_array_cache{$user} = \@mods;
1739 $cmd->finish() if ($cmd);
1741 elsif ($proto eq "ldap") {
1742 # Find users in LDAP
1744 my $rv = $dbh->search(
1746 filter => '(objectClass='.
1747 $args->{'userclass'}.')',
1749 if ($rv && !$rv->code) {
1750 foreach my $u ($rv->all_entries) {
1751 my $user = $u->get_value('cn');
1752 my @mods =$u->get_value('webminModule');
1753 foreach my $m (@mods) {
1754 $main::acl_hash_cache{$user,
1757 $main::acl_array_cache{$user} = \@mods;
1761 &disconnect_userdb($userdb, $dbh);
1764 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1765 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1770 Returns the file containing the webmin ACL, which is usually
1771 /etc/webmin/webmin.acl.
1776 return "$config_directory/webmin.acl";
1781 Does nothing, but kept around for compatability.
1788 =head2 get_miniserv_config(&hash)
1790 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1791 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1795 sub get_miniserv_config
1797 return &read_file_cached(
1798 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1801 =head2 put_miniserv_config(&hash)
1803 Writes out the Webmin webserver configuration file from the contents of
1804 the given hash ref. This should be initially populated by get_miniserv_config,
1807 get_miniserv_config(\%miniserv);
1808 $miniserv{'port'} = 10005;
1809 put_miniserv_config(\%miniserv);
1813 sub put_miniserv_config
1815 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1819 =head2 restart_miniserv([nowait])
1821 Kill the old miniserv process and re-start it, then optionally waits for
1822 it to restart. This will apply all configuration settings.
1825 sub restart_miniserv
1828 return undef if (&is_readonly_mode());
1830 &get_miniserv_config(\%miniserv) || return;
1833 if ($gconfig{'os_type'} ne 'windows') {
1834 # On Unix systems, we can restart with a signal
1835 my ($pid, $addr, $i);
1836 $miniserv{'inetd'} && return;
1837 my @oldst = stat($miniserv{'pidfile'});
1838 $pid = $ENV{'MINISERV_PID'};
1840 open(PID, $miniserv{'pidfile'}) ||
1841 &error("Failed to open PID file $miniserv{'pidfile'}");
1844 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1847 # Just signal miniserv to restart
1848 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1850 # Wait till new PID is written, indicating a restart
1851 for($i=0; $i<60; $i++) {
1853 my @newst = stat($miniserv{'pidfile'});
1854 last if ($newst[9] != $oldst[9]);
1856 $i < 60 || &error("Webmin server did not write new PID file");
1858 ## Totally kill the process and re-run it
1859 #$SIG{'TERM'} = 'IGNORE';
1860 #&kill_logged('TERM', $pid);
1861 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1864 # On Windows, we need to use the flag file
1865 open(TOUCH, ">$miniserv{'restartflag'}");
1870 # wait for miniserv to come back up
1871 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1873 for($i=0; $i<20; $i++) {
1875 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1876 my $rv = connect(STEST,
1877 pack_sockaddr_in($miniserv{'port'}, $addr));
1879 last if ($rv && ++$ok >= 2);
1881 $i < 20 || &error("Failed to restart Webmin server!");
1885 =head2 reload_miniserv
1887 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1888 configuration files. Not all changes will be applied though, such as the
1889 IP addresses and ports to accept connections on.
1894 return undef if (&is_readonly_mode());
1896 &get_miniserv_config(\%miniserv) || return;
1898 if ($gconfig{'os_type'} ne 'windows') {
1899 # Send a USR1 signal to re-read the config
1900 my ($pid, $addr, $i);
1901 $miniserv{'inetd'} && return;
1902 $pid = $ENV{'MINISERV_PID'};
1904 open(PID, $miniserv{'pidfile'}) ||
1905 &error("Failed to open PID file $miniserv{'pidfile'}");
1908 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1910 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1912 # Make sure this didn't kill Webmin!
1914 if (!kill(0, $pid)) {
1915 print STDERR "USR1 signal killed Webmin - restarting\n";
1916 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1920 # On Windows, we need to use the flag file
1921 open(TOUCH, ">$miniserv{'reloadflag'}");
1926 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1928 Returns 1 if some module is supported on the current operating system, or the
1929 OS supplies as parameters. The parameters are :
1931 =item minfo - A hash ref of module information, as returned by get_module_info
1933 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1935 =item os-version - The Webmin OS version to use, such as 13.0
1937 =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.
1940 sub check_os_support
1942 my $oss = $_[0]->{'os_support'};
1943 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1944 # May provide usable API
1945 $oss .= " ".$_[0]->{'api_os_support'};
1947 if ($_[0]->{'nozone'} && &running_in_zone()) {
1948 # Not supported in a Solaris Zone
1951 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1952 # Not supported in a Linux Vserver
1955 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1956 # Not supported in an OpenVZ container
1959 return 1 if (!$oss || $oss eq '*');
1960 my $osver = $_[2] || $gconfig{'os_version'};
1961 my $ostype = $_[1] || $gconfig{'os_type'};
1964 my ($os, $ver, $codes);
1965 my ($neg) = ($oss =~ s/^!//); # starts with !
1966 $anyneg++ if ($neg);
1967 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1969 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1971 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1973 $os = $1; $ver = $2; $oss = $3;
1975 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1977 $os = $1; $codes = $2; $oss = $3;
1979 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1981 $codes = $1; $oss = $2;
1983 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1985 $os = $1; $oss = $2;
1988 next if ($os && !($os eq $ostype ||
1989 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1990 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1991 next if ($osver < $1 || $osver > $2);
1993 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1994 next if ($osver < $1);
1996 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1997 next if ($osver > $1);
2000 next if ($ver ne $osver);
2002 next if ($codes && !eval $codes);
2008 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
2010 Downloads data from a HTTP url to a local file or string. The parameters are :
2012 =item host - The hostname part of the URL, such as www.google.com
2014 =item port - The HTTP port number, such as 80
2016 =item page - The filename part of the URL, like /index.html
2018 =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.
2020 =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.
2022 =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.
2024 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2026 =item user - If set, HTTP authentication is done with this username.
2028 =item pass - The HTTP password to use with the username above.
2030 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2032 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2034 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2036 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2041 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2042 $timeout, $osdn, $nocache, $headers) = @_;
2043 if ($gconfig{'debug_what_net'}) {
2044 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2045 ($user ? " user=$user pass=$pass" : "").
2046 (ref($dest) ? "" : " dest=$dest"));
2049 # Convert OSDN URL first
2050 my $prot = $ssl ? "https://" : "http://";
2051 my $portstr = $ssl && $port == 443 ||
2052 !$ssl && $port == 80 ? "" : ":$port";
2053 ($host, $port, $page, $ssl) = &parse_http_url(
2054 &convert_osdn_url($prot.$host.$portstr.$page));
2057 # Check if we already have cached the URL
2058 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2059 my $cfile = &check_in_http_cache($url);
2060 if ($cfile && !$nocache) {
2061 # Yes! Copy to dest file or variable
2062 &$cbfunc(6, $url) if ($cbfunc);
2064 &open_readfile(CACHEFILE, $cfile);
2066 $$dest = <CACHEFILE>;
2070 ©_source_dest($cfile, $dest);
2077 push(@headers, [ "Host", $host ]);
2078 push(@headers, [ "User-agent", "Webmin" ]);
2079 push(@headers, [ "Accept-language", "en" ]);
2081 my $auth = &encode_base64("$user:$pass");
2082 $auth =~ tr/\r\n//d;
2083 push(@headers, [ "Authorization", "Basic $auth" ]);
2085 foreach my $hname (keys %$headers) {
2086 push(@headers, [ $hname, $headers->{$hname} ]);
2089 # Actually download it
2090 $main::download_timed_out = undef;
2091 local $SIG{ALRM} = \&download_timeout;
2092 alarm($timeout || 60);
2093 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2095 $h = $main::download_timed_out if ($main::download_timed_out);
2097 if ($error) { $$error = $h; return; }
2098 else { &error($h); }
2100 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2101 $headers, $ssl, $nocache);
2102 if ((!$error || !$$error) && !$nocache) {
2103 &write_to_http_cache($url, $dest);
2107 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2109 Do a HTTP download, after the headers have been sent. For internal use only,
2110 typically called by http_download.
2113 sub complete_http_download
2115 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2121 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2122 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2124 if ($_[2]) { ${$_[2]} = $line; return; }
2125 else { &error("Download failed : $line"); }
2128 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2131 $line = &read_http_connection($_[0]);
2132 $line =~ tr/\r\n//d;
2133 $line =~ /^(\S+):\s+(.*)$/ || last;
2134 $header{lc($1)} = $2;
2135 push(@headers, [ lc($1), $2 ]);
2138 if ($main::download_timed_out) {
2139 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2140 else { &error($main::download_timed_out); }
2142 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2143 if ($rcode >= 300 && $rcode < 400) {
2144 # follow the redirect
2145 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2146 my ($host, $port, $page, $ssl);
2147 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2148 $ssl = $1 eq 'https' ? 1 : 0;
2149 $host = $2; $port = $3; $page = $4 || "/";
2151 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2152 $ssl = $1 eq 'https' ? 1 : 0;
2153 $host = $2; $port = 80; $page = $3 || "/";
2155 elsif ($header{'location'} =~ /^\// && $_[5]) {
2156 # Relative to same server
2160 $page = $header{'location'};
2162 elsif ($header{'location'}) {
2163 # Assume relative to same dir .. not handled
2164 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2165 else { &error("Invalid Location header $header{'location'}"); }
2168 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2169 else { &error("Missing Location header"); }
2172 ($page, $params) = split(/\?/, $page);
2174 $page .= "?".$params if (defined($params));
2175 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2176 undef, undef, undef, $_[4], $_[9], $_[7]);
2181 # Append to a variable
2182 while(defined($buf = &read_http_connection($_[0], 1024))) {
2184 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2190 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2191 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2192 else { &error("Failed to write to $_[1] : $!"); }
2194 binmode(PFILE); # For windows
2195 while(defined($buf = &read_http_connection($_[0], 1024))) {
2196 &print_tempfile(PFILE, $buf);
2197 $got += length($buf);
2198 &$cbfunc(3, $got) if ($cbfunc);
2200 &close_tempfile(PFILE);
2201 if ($header{'content-length'} &&
2202 $got != $header{'content-length'}) {
2203 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2204 else { &error("Download incomplete"); }
2207 &$cbfunc(4) if ($cbfunc);
2209 &close_http_connection($_[0]);
2213 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2215 Download data from an FTP site to a local file. The parameters are :
2217 =item host - FTP server hostname
2219 =item file - File on the FTP server to download
2221 =item destfile - File on the Webmin system to download data to
2223 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2225 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2227 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2229 =item pass - Password for the username above.
2231 =item port - FTP server port number, which defaults to 21 if not set.
2236 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2238 if ($gconfig{'debug_what_net'}) {
2239 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2240 ($user ? " user=$user pass=$pass" : "").
2241 (ref($dest) ? "" : " dest=$dest"));
2245 if (&is_readonly_mode()) {
2246 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2248 else { &error("FTP connections not allowed in readonly mode"); }
2251 # Check if we already have cached the URL
2252 my $url = "ftp://".$host.$file;
2253 my $cfile = &check_in_http_cache($url);
2255 # Yes! Copy to dest file or variable
2256 &$cbfunc(6, $url) if ($cbfunc);
2258 &open_readfile(CACHEFILE, $cfile);
2260 $$dest = <CACHEFILE>;
2264 ©_source_dest($cfile, $dest);
2269 # Actually download it
2270 $main::download_timed_out = undef;
2271 local $SIG{ALRM} = \&download_timeout;
2274 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2275 # download through http-style proxy
2277 if (&open_socket($1, $2, "SOCK", \$error)) {
2279 if ($main::download_timed_out) {
2281 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2282 else { &error($main::download_timed_out); }
2284 my $esc = $_[1]; $esc =~ s/ /%20/g;
2285 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2286 my $portstr = $port == 21 ? "" : ":$port";
2287 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2288 print SOCK "User-agent: Webmin\r\n";
2289 if ($gconfig{'proxy_user'}) {
2290 my $auth = &encode_base64(
2291 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2292 $auth =~ tr/\r\n//d;
2293 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2296 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2299 elsif (!$gconfig{'proxy_fallback'}) {
2301 if ($error) { $$error = $main::download_timed_out; return 0; }
2302 else { &error($main::download_timed_out); }
2307 # connect to host and login with real FTP protocol
2308 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2310 if ($main::download_timed_out) {
2311 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2312 else { &error($main::download_timed_out); }
2314 &ftp_command("", 2, $_[3]) || return 0;
2316 # Login as supplied user
2317 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2319 if (int($urv[1]/100) == 3) {
2320 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2324 # Login as anonymous
2325 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2327 if (int($urv[1]/100) == 3) {
2328 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2332 &$cbfunc(1, 0) if ($cbfunc);
2335 # get the file size and tell the callback
2336 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2337 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2338 defined($size) || return 0;
2340 &$cbfunc(2, int($size));
2344 my $pasv = &ftp_command("PASV", 2, $_[3]);
2345 defined($pasv) || return 0;
2346 $pasv =~ /\(([0-9,]+)\)/;
2347 @n = split(/,/ , $1);
2348 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2349 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2350 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2354 &open_tempfile(PFILE, ">$_[2]", 1);
2355 while(read(CON, $buf, 1024) > 0) {
2356 &print_tempfile(PFILE, $buf);
2357 $got += length($buf);
2358 &$cbfunc(3, $got) if ($cbfunc);
2360 &close_tempfile(PFILE);
2362 if ($got != $size) {
2363 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2364 else { &error("Download incomplete"); }
2366 &$cbfunc(4) if ($cbfunc);
2368 &ftp_command("", 2, $_[3]) || return 0;
2372 &ftp_command("QUIT", 2, $_[3]) || return 0;
2376 &write_to_http_cache($url, $dest);
2380 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2382 Upload data from a local file to an FTP site. The parameters are :
2384 =item host - FTP server hostname
2386 =item file - File on the FTP server to write to
2388 =item srcfile - File on the Webmin system to upload data from
2390 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2392 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2394 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2396 =item pass - Password for the username above.
2398 =item port - FTP server port number, which defaults to 21 if not set.
2405 if (&is_readonly_mode()) {
2406 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2408 else { &error("FTP connections not allowed in readonly mode"); }
2411 $main::download_timed_out = undef;
2412 local $SIG{ALRM} = \&download_timeout;
2415 # connect to host and login
2416 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2418 if ($main::download_timed_out) {
2419 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2420 else { &error($main::download_timed_out); }
2422 &ftp_command("", 2, $_[3]) || return 0;
2424 # Login as supplied user
2425 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2427 if (int($urv[1]/100) == 3) {
2428 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2432 # Login as anonymous
2433 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2435 if (int($urv[1]/100) == 3) {
2436 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2440 &$cbfunc(1, 0) if ($cbfunc);
2442 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2444 # get the file size and tell the callback
2445 my @st = stat($_[2]);
2447 &$cbfunc(2, $st[7]);
2451 my $pasv = &ftp_command("PASV", 2, $_[3]);
2452 defined($pasv) || return 0;
2453 $pasv =~ /\(([0-9,]+)\)/;
2454 @n = split(/,/ , $1);
2455 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2456 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2461 while(read(PFILE, $buf, 1024) > 0) {
2463 $got += length($buf);
2464 &$cbfunc(3, $got) if ($cbfunc);
2468 if ($got != $st[7]) {
2469 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2470 else { &error("Upload incomplete"); }
2472 &$cbfunc(4) if ($cbfunc);
2475 &ftp_command("", 2, $_[3]) || return 0;
2476 &ftp_command("QUIT", 2, $_[3]) || return 0;
2482 =head2 no_proxy(host)
2484 Checks if some host is on the no proxy list. For internal use by the
2485 http_download and ftp_download functions.
2490 my $ip = &to_ipaddress($_[0]);
2491 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2492 return 1 if ($_[0] =~ /\Q$n\E/ ||
2498 =head2 open_socket(host, port, handle, [&error])
2500 Open a TCP connection to some host and port, using a file handle. The
2503 =item host - Hostname or IP address to connect to.
2505 =item port - TCP port number.
2507 =item handle - A file handle name to use for the connection.
2509 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2514 my ($host, $port, $fh, $err) = @_;
2515 $fh = &callers_package($fh);
2517 if ($gconfig{'debug_what_net'}) {
2518 &webmin_debug_log('TCP', "host=$host port=$port");
2520 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2521 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2522 else { &error("Failed to create socket : $!"); }
2525 if (!($addr = inet_aton($host))) {
2526 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2527 else { &error("Failed to lookup IP address for $host"); }
2529 if ($gconfig{'bind_proxy'}) {
2530 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2531 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2532 else { &error("Failed to bind to source address : $!"); }
2535 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2536 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2537 else { &error("Failed to connect to $host:$port : $!"); }
2539 my $old = select($fh); $| =1; select($old);
2543 =head2 download_timeout
2545 Called when a download times out. For internal use only.
2548 sub download_timeout
2550 $main::download_timed_out = "Download timed out";
2553 =head2 ftp_command(command, expected, [&error], [filehandle])
2555 Send an FTP command, and die if the reply is not what was expected. Mainly
2556 for internal use by the ftp_download and ftp_upload functions.
2561 my ($cmd, $expect, $err, $fh) = @_;
2563 $fh = &callers_package($fh);
2566 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2568 print $fh "$cmd\r\n";
2571 if (!($line = <$fh>)) {
2573 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2574 else { &error("Failed to read reply to $what"); }
2576 $line =~ /^(...)(.)(.*)$/;
2579 foreach my $c (@$expect) {
2580 $found++ if (int($1/100) == $c);
2584 $found++ if (int($1/100) == $_[1]);
2588 if ($err) { $$err = "$what failed : $3"; return undef; }
2589 else { &error("$what failed : $3"); }
2594 # Need to skip extra stuff..
2596 if (!($line = <$fh>)) {
2598 if ($$err) { $$err = "Failed to read reply to $what";
2600 else { &error("Failed to read reply to $what"); }
2602 $line =~ /^(....)(.*)$/; $reply .= $2;
2603 if ($1 eq "$rcode ") { last; }
2607 return wantarray ? ($reply, $rcode) : $reply;
2610 =head2 to_ipaddress(hostname)
2612 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2613 it cannot be resolved.
2618 if (&check_ipaddress($_[0])) {
2622 my $hn = gethostbyname($_[0]);
2623 return undef if (!$hn);
2624 local @ip = unpack("CCCC", $hn);
2625 return join("." , @ip);
2629 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2631 Renders a 4-column table of icons. The useful parameters are :
2633 =item links - An array ref of link destination URLs for the icons.
2635 =item titles - An array ref of titles to appear under the icons.
2637 =item icons - An array ref of URLs for icon images.
2639 =item columns - Number of columns to layout the icons with. Defaults to 4.
2644 &load_theme_library();
2645 if (defined(&theme_icons_table)) {
2646 &theme_icons_table(@_);
2650 my $cols = $_[3] ? $_[3] : 4;
2651 my $per = int(100.0 / $cols);
2652 print "<table class='icons_table' width=100% cellpadding=5>\n";
2653 for(my $i=0; $i<@{$_[0]}; $i++) {
2654 if ($i%$cols == 0) { print "<tr>\n"; }
2655 print "<td width=$per% align=center valign=top>\n";
2656 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2657 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2658 $_[7]->[$i], $_[8]->[$i]);
2660 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2662 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2663 print "</tr>\n" if ($need_tr);
2667 =head2 replace_file_line(file, line, [newline]*)
2669 Replaces one line in some file with 0 or more new lines. The parameters are :
2671 =item file - Full path to some file, like /etc/hosts.
2673 =item line - Line number to replace, starting from 0.
2675 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2678 sub replace_file_line
2681 my $realfile = &translate_filename($_[0]);
2682 open(FILE, $realfile);
2685 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2686 else { splice(@lines, $_[1], 1); }
2687 &open_tempfile(FILE, ">$realfile");
2688 &print_tempfile(FILE, @lines);
2689 &close_tempfile(FILE);
2692 =head2 read_file_lines(file, [readonly])
2694 Returns a reference to an array containing the lines from some file. This
2695 array can be modified, and will be written out when flush_file_lines()
2696 is called. The parameters are :
2698 =item file - Full path to the file to read.
2700 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2704 $lref = read_file_lines("/etc/hosts");
2705 push(@$lref, "127.0.0.1 localhost");
2706 flush_file_lines("/etc/hosts");
2712 my ($package, $filename, $line) = caller;
2713 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2715 my $realfile = &translate_filename($_[0]);
2716 if (!$main::file_cache{$realfile}) {
2719 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2720 open(READFILE, $realfile);
2723 $eol = /\r\n$/ ? "\r\n" : "\n";
2729 $main::file_cache{$realfile} = \@lines;
2730 $main::file_cache_noflush{$realfile} = $_[1];
2731 $main::file_cache_eol{$realfile} = $eol || "\n";
2734 # Make read-write if currently readonly
2736 $main::file_cache_noflush{$realfile} = 0;
2739 return $main::file_cache{$realfile};
2742 =head2 flush_file_lines([file], [eol])
2744 Write out to a file previously read by read_file_lines to disk (except
2745 for those marked readonly). The parameters are :
2747 =item file - The file to flush out.
2749 =item eof - End-of-line character for each line. Defaults to \n.
2752 sub flush_file_lines
2756 local $trans = &translate_filename($_[0]);
2757 $main::file_cache{$trans} ||
2758 &error("flush_file_lines called on non-loaded file $trans");
2759 push(@files, $trans);
2762 @files = ( keys %main::file_cache );
2764 foreach my $f (@files) {
2765 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2766 if (!$main::file_cache_noflush{$f}) {
2767 no warnings; # XXX Bareword file handles should go away
2768 &open_tempfile(FLUSHFILE, ">$f");
2769 foreach my $line (@{$main::file_cache{$f}}) {
2770 (print FLUSHFILE $line,$eol) ||
2771 &error(&text("efilewrite", $f, $!));
2773 &close_tempfile(FLUSHFILE);
2775 delete($main::file_cache{$f});
2776 delete($main::file_cache_noflush{$f});
2780 =head2 unflush_file_lines(file)
2782 Clear the internal cache of some given file, previously read by read_file_lines.
2785 sub unflush_file_lines
2787 my $realfile = &translate_filename($_[0]);
2788 delete($main::file_cache{$realfile});
2789 delete($main::file_cache_noflush{$realfile});
2792 =head2 unix_user_input(fieldname, user, [form])
2794 Returns HTML for an input to select a Unix user. By default this is a text
2795 box with a user popup button next to it.
2800 if (defined(&theme_unix_user_input)) {
2801 return &theme_unix_user_input(@_);
2803 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2804 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2807 =head2 unix_group_input(fieldname, user, [form])
2809 Returns HTML for an input to select a Unix group. By default this is a text
2810 box with a group popup button next to it.
2813 sub unix_group_input
2815 if (defined(&theme_unix_group_input)) {
2816 return &theme_unix_group_input(@_);
2818 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2819 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2822 =head2 hlink(text, page, [module], [width], [height])
2824 Returns HTML for a link that when clicked on pops up a window for a Webmin
2825 help page. The parameters are :
2827 =item text - Text for the link.
2829 =item page - Help page code, such as 'intro'.
2831 =item module - Module the help page is in. Defaults to the current module.
2833 =item width - Width of the help popup window. Defaults to 600 pixels.
2835 =item height - Height of the help popup window. Defaults to 400 pixels.
2837 The actual help pages are in each module's help sub-directory, in files with
2843 if (defined(&theme_hlink)) {
2844 return &theme_hlink(@_);
2846 my $mod = $_[2] ? $_[2] : &get_module_name();
2847 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2848 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2849 return "<a onClick='window.open(\"$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>";
2852 =head2 user_chooser_button(field, multiple, [form])
2854 Returns HTML for a javascript button for choosing a Unix user or users.
2855 The parameters are :
2857 =item field - Name of the HTML field to place the username into.
2859 =item multiple - Set to 1 if multiple users can be selected.
2861 =item form - Index of the form on the page.
2864 sub user_chooser_button
2866 return undef if (!&supports_users());
2867 return &theme_user_chooser_button(@_)
2868 if (defined(&theme_user_chooser_button));
2869 my $form = defined($_[2]) ? $_[2] : 0;
2870 my $w = $_[1] ? 500 : 300;
2872 if ($_[1] && $gconfig{'db_sizeusers'}) {
2873 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2875 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2876 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2878 return "<input type=button onClick='ifield = form.$_[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";
2881 =head2 group_chooser_button(field, multiple, [form])
2883 Returns HTML for a javascript button for choosing a Unix group or groups
2884 The parameters are :
2886 =item field - Name of the HTML field to place the group name into.
2888 =item multiple - Set to 1 if multiple groups can be selected.
2890 =item form - Index of the form on the page.
2893 sub group_chooser_button
2895 return undef if (!&supports_users());
2896 return &theme_group_chooser_button(@_)
2897 if (defined(&theme_group_chooser_button));
2898 my $form = defined($_[2]) ? $_[2] : 0;
2899 my $w = $_[1] ? 500 : 300;
2901 if ($_[1] && $gconfig{'db_sizeusers'}) {
2902 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2904 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2905 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2907 return "<input type=button onClick='ifield = form.$_[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";
2910 =head2 foreign_check(module, [api-only])
2912 Checks if some other module exists and is supported on this OS. The parameters
2915 =item module - Name of the module to check.
2917 =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.
2922 my ($mod, $api) = @_;
2924 my $mdir = &module_root_directory($mod);
2925 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2926 return &check_os_support(\%minfo, undef, undef, $api);
2929 =head2 foreign_exists(module)
2931 Checks if some other module exists. The module parameter is the short module
2937 my $mdir = &module_root_directory($_[0]);
2938 return -r "$mdir/module.info";
2941 =head2 foreign_available(module)
2943 Returns 1 if some module is installed, and acessible to the current user. The
2944 module parameter is the module directory name.
2947 sub foreign_available
2949 return 0 if (!&foreign_check($_[0]) &&
2950 !$gconfig{'available_even_if_no_support'});
2951 my %foreign_module_info = &get_module_info($_[0]);
2953 # Check list of allowed modules
2955 &read_acl(\%acl, undef);
2956 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2957 !$acl{$base_remote_user,'*'});
2959 # Check for usermod restrictions
2960 my @usermods = &list_usermods();
2961 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2963 if (&get_product_name() eq "webmin") {
2964 # Check if the user has any RBAC privileges in this module
2965 if (&supports_rbac($_[0]) &&
2966 &use_rbac_module_acl(undef, $_[0])) {
2967 # RBAC is enabled for this user and module - check if he
2969 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2970 return 0 if (!$rbacs);
2972 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2973 # If denying access to modules not specifically allowed by
2974 # RBAC, then prevent access
2979 # Check readonly support
2980 if (&is_readonly_mode()) {
2981 return 0 if (!$foreign_module_info{'readonly'});
2984 # Check if theme vetos
2985 if (defined(&theme_foreign_available)) {
2986 return 0 if (!&theme_foreign_available($_[0]));
2989 # Check if licence module vetos
2990 if ($main::licence_module) {
2991 return 0 if (!&foreign_call($main::licence_module,
2992 "check_module_licence", $_[0]));
2998 =head2 foreign_require(module, [file], [package])
3000 Brings in functions from another module, and places them in the Perl namespace
3001 with the same name as the module. The parameters are :
3003 =item module - The source module's directory name, like sendmail.
3005 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
3007 =item package - Perl package to place the module's functions and global variables in.
3009 If the original module name contains dashes, they will be replaced with _ in
3015 my ($mod, $file, $pkg) = @_;
3016 $pkg ||= $mod || "global";
3017 $pkg =~ s/[^A-Za-z0-9]/_/g;
3020 push(@files, $file);
3024 my %minfo = &get_module_info($mod);
3025 if ($minfo{'library'}) {
3026 @files = split(/\s+/, $minfo{'library'});
3029 @files = ( $mod."-lib.pl" );
3032 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3033 return 1 if (!@files);
3034 foreach my $f (@files) {
3035 $main::done_foreign_require{$pkg,$f}++;
3038 my $mdir = &module_root_directory($mod);
3039 @INC = &unique($mdir, @INC);
3040 -d $mdir || &error("Module $mod does not exist");
3041 if (!&get_module_name() && $mod) {
3044 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3045 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3046 my $code = "package $pkg; ".
3047 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3048 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3049 foreach my $f (@files) {
3050 $code .= "do '$mdir/$f' || die \$@; ";
3053 if (defined($old_fmn)) {
3054 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3057 delete($ENV{'FOREIGN_MODULE_NAME'});
3059 if (defined($old_frd)) {
3060 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3063 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3066 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3070 =head2 foreign_call(module, function, [arg]*)
3072 Call a function in another module. The module parameter is the target module
3073 directory name, function is the perl sub to call, and the remaining parameters
3074 are the arguments. However, unless you need to call a function whose name
3075 is dynamic, it is better to use Perl's cross-module function call syntax
3076 like module::function(args).
3081 my $pkg = $_[0] || "global";
3082 $pkg =~ s/[^A-Za-z0-9]/_/g;
3083 my @args = @_[2 .. @_-1];
3084 $main::foreign_args = \@args;
3085 my @rv = eval <<EOF;
3087 &$_[1](\@{\$main::foreign_args});
3089 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3090 return wantarray ? @rv : $rv[0];
3093 =head2 foreign_config(module, [user-config])
3095 Get the configuration from another module, and return it as a hash. If the
3096 user-config parameter is set to 1, returns the Usermin user-level preferences
3097 for the current user instead.
3102 my ($mod, $uc) = @_;
3105 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3106 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3107 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3110 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3115 =head2 foreign_installed(module, mode)
3117 Checks if the server for some module is installed, and possibly also checks
3118 if the module has been configured by Webmin.
3119 For mode 1, returns 2 if the server is installed and configured for use by
3120 Webmin, 1 if installed but not configured, or 0 otherwise.
3121 For mode 0, returns 1 if installed, 0 if not.
3122 If the module does not provide an install_check.pl script, assumes that
3123 the server is installed.
3126 sub foreign_installed
3128 my ($mod, $configured) = @_;
3129 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3131 return $main::foreign_installed_cache{$mod,$configured};
3135 if (!&foreign_check($mod)) {
3140 my $mdir = &module_root_directory($mod);
3141 if (!-r "$mdir/install_check.pl") {
3142 # Not known, assume OK
3143 $rv = $configured ? 2 : 1;
3146 # Call function to check
3147 &foreign_require($mod, "install_check.pl");
3148 $rv = &foreign_call($mod, "is_installed", $configured);
3151 $main::foreign_installed_cache{$mod,$configured} = $rv;
3156 =head2 foreign_defined(module, function)
3158 Returns 1 if some function is defined in another module. In general, it is
3159 simpler to use the syntax &defined(module::function) instead.
3165 $pkg =~ s/[^A-Za-z0-9]/_/g;
3166 my $func = "${pkg}::$_[1]";
3167 return defined(&$func);
3170 =head2 get_system_hostname([short])
3172 Returns the hostname of this system. If the short parameter is set to 1,
3173 then the domain name is not prepended - otherwise, Webmin will attempt to get
3174 the fully qualified hostname, like foo.example.com.
3177 sub get_system_hostname
3180 if (!$main::get_system_hostname[$m]) {
3181 if ($gconfig{'os_type'} ne 'windows') {
3182 # Try some common Linux hostname files first
3184 if ($gconfig{'os_type'} eq 'redhat-linux') {
3186 &read_env_file("/etc/sysconfig/network", \%nc);
3187 if ($nc{'HOSTNAME'}) {
3188 $fromfile = $nc{'HOSTNAME'};
3191 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3192 my $hn = &read_file_contents("/etc/hostname");
3198 elsif ($gconfig{'os_type'} eq 'open-linux') {
3199 my $hn = &read_file_contents("/etc/HOSTNAME");
3205 elsif ($gconfig{'os_type'} eq 'solaris') {
3206 my $hn = &read_file_contents("/etc/nodename");
3213 # If we found a hostname, use it if value
3214 if ($fromfile && ($m || $fromfile =~ /\./)) {
3216 $fromfile =~ s/\..*$//;
3218 $main::get_system_hostname[$m] = $fromfile;
3222 # Can use hostname command on Unix
3223 &execute_command("hostname", undef,
3224 \$main::get_system_hostname[$m], undef, 0, 1);
3225 chop($main::get_system_hostname[$m]);
3227 eval "use Sys::Hostname";
3229 $main::get_system_hostname[$m] = eval "hostname()";
3231 if ($@ || !$main::get_system_hostname[$m]) {
3232 $main::get_system_hostname[$m] = "UNKNOWN";
3235 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3236 $gconfig{'os_type'} =~ /linux$/ &&
3237 !$gconfig{'no_hostname_f'} && !$_[0]) {
3238 # Try with -f flag to get fully qualified name
3240 my $ex = &execute_command("hostname -f", undef, \$flag,
3243 if ($ex || $flag eq "") {
3244 # -f not supported! We have probably set the
3245 # hostname to just '-f'. Fix the problem
3248 &execute_command("hostname ".
3249 quotemeta($main::get_system_hostname[$m]),
3250 undef, undef, undef, 0, 1);
3254 $main::get_system_hostname[$m] = $flag;
3259 # On Windows, try computername environment variable
3260 return $ENV{'computername'} if ($ENV{'computername'});
3261 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3263 # Fall back to net name command
3264 my $out = `net name 2>&1`;
3265 if ($out =~ /\-+\r?\n(\S+)/) {
3266 $main::get_system_hostname[$m] = $1;
3269 $main::get_system_hostname[$m] = "windows";
3273 return $main::get_system_hostname[$m];
3276 =head2 get_webmin_version
3278 Returns the version of Webmin currently being run, such as 1.450.
3281 sub get_webmin_version
3283 if (!$get_webmin_version) {
3284 open(VERSION, "$root_directory/version") || return 0;
3285 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3288 return $get_webmin_version;
3291 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3293 Returns a hash containing access control options for the given user and module.
3294 By default the current username and module name are used. If the no-rbac flag
3295 is given, the permissions will not be updated based on the user's RBAC role
3296 (as seen on Solaris). If the no-default flag is given, default permissions for
3297 the module will not be included.
3302 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3303 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3304 my $mdir = &module_root_directory($m);
3307 # Read default ACL first, to be overridden by per-user settings
3308 &read_file_cached("$mdir/defaultacl", \%rv);
3310 # If this isn't a master admin user, apply the negative permissions
3311 # so that he doesn't un-expectedly gain access to new features
3313 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3314 if ($gaccess{'negative'}) {
3315 &read_file_cached("$mdir/negativeacl", \%rv);
3319 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3320 # RBAC overrides exist for this user in this module
3321 my $rbac = &get_rbac_module_acl(
3322 defined($_[0]) ? $_[0] : $remote_user, $m);
3323 foreach my $r (keys %$rbac) {
3324 $rv{$r} = $rbac->{$r};
3327 elsif ($gconfig{"risk_$u"} && $m) {
3328 # ACL is defined by user's risk level
3329 my $rf = $gconfig{"risk_$u"}.'.risk';
3330 &read_file_cached("$mdir/$rf", \%rv);
3332 my $sf = $gconfig{"skill_$u"}.'.skill';
3333 &read_file_cached("$mdir/$sf", \%rv);
3336 # Use normal Webmin ACL, if a user is set
3337 my $userdb = &get_userdb_string();
3339 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3340 # Look for this user in the user/group DB, if one is defined
3341 # and if the user might be in the DB
3342 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3343 ref($dbh) || &error(&text('euserdbacl', $dbh));
3344 if ($proto eq "mysql" || $proto eq "postgresql") {
3345 # Find the user in the SQL DB
3346 my $cmd = $dbh->prepare(
3347 "select id from webmin_user where name = ?");
3348 $cmd && $cmd->execute($u) ||
3349 &error(&text('euserdbacl', $dbh->errstr));
3350 my ($id) = $cmd->fetchrow();
3351 $foundindb = 1 if (defined($id));
3354 # Fetch ACLs with SQL
3356 my $cmd = $dbh->prepare(
3357 "select attr,value from webmin_user_acl ".
3358 "where id = ? and module = ?");
3359 $cmd && $cmd->execute($id, $m) ||
3360 &error(&text('euserdbacl', $dbh->errstr));
3361 while(my ($a, $v) = $cmd->fetchrow()) {
3367 elsif ($proto eq "ldap") {
3369 my $rv = $dbh->search(
3371 filter => '(&(cn='.$u.')(objectClass='.
3372 $args->{'userclass'}.'))',
3374 if (!$rv || $rv->code) {
3375 &error(&text('euserdbacl',
3376 $rv ? $rv->error : "Unknown error"));
3378 my ($user) = $rv->all_entries;
3380 # Find ACL sub-object for the module
3381 my $ldapm = $m || "global";
3383 my $rv = $dbh->search(
3384 base => $user->dn(),
3385 filter => '(cn='.$ldapm.')',
3387 if (!$rv || $rv->code) {
3388 &error(&text('euserdbacl',
3389 $rv ? $rv->error : "Unknown error"));
3391 my ($acl) = $rv->all_entries;
3393 foreach my $av ($acl->get_value(
3395 my ($a, $v) = split(/=/, $av,2);
3401 &disconnect_userdb($userdb, $dbh);
3405 # Read from local files
3406 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3407 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3409 "$config_directory/$m/$remote_user.acl",\%rv);
3413 if ($tconfig{'preload_functions'}) {
3414 &load_theme_library();
3416 if (defined(&theme_get_module_acl)) {
3417 %rv = &theme_get_module_acl($u, $m, \%rv);
3422 =head2 get_group_module_acl(group, [module], [no-default])
3424 Returns the ACL for a Webmin group, in an optional module (which defaults to
3425 the current module).
3428 sub get_group_module_acl
3431 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3432 my $mdir = &module_root_directory($m);
3435 &read_file_cached("$mdir/defaultacl", \%rv);
3438 my $userdb = &get_userdb_string();
3441 # Look for this group in the user/group DB
3442 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3443 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3444 if ($proto eq "mysql" || $proto eq "postgresql") {
3445 # Find the group in the SQL DB
3446 my $cmd = $dbh->prepare(
3447 "select id from webmin_group where name = ?");
3448 $cmd && $cmd->execute($g) ||
3449 &error(&text('egroupdbacl', $dbh->errstr));
3450 my ($id) = $cmd->fetchrow();
3451 $foundindb = 1 if (defined($id));
3454 # Fetch ACLs with SQL
3456 my $cmd = $dbh->prepare(
3457 "select attr,value from webmin_group_acl ".
3458 "where id = ? and module = ?");
3459 $cmd && $cmd->execute($id, $m) ||
3460 &error(&text('egroupdbacl', $dbh->errstr));
3461 while(my ($a, $v) = $cmd->fetchrow()) {
3467 elsif ($proto eq "ldap") {
3468 # Find group in LDAP
3469 my $rv = $dbh->search(
3471 filter => '(&(cn='.$g.')(objectClass='.
3472 $args->{'groupclass'}.'))',
3474 if (!$rv || $rv->code) {
3475 &error(&text('egroupdbacl',
3476 $rv ? $rv->error : "Unknown error"));
3478 my ($group) = $rv->all_entries;
3480 # Find ACL sub-object for the module
3483 my $rv = $dbh->search(
3484 base => $group->dn(),
3485 filter => '(cn='.$ldapm.')',
3487 if (!$rv || $rv->code) {
3488 &error(&text('egroupdbacl',
3489 $rv ? $rv->error : "Unknown error"));
3491 my ($acl) = $rv->all_entries;
3493 foreach my $av ($acl->get_value('webminAcl')) {
3494 my ($a, $v) = split(/=/, $av, 2);
3500 &disconnect_userdb($userdb, $dbh);
3503 # Read from local files
3504 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3506 if (defined(&theme_get_module_acl)) {
3507 %rv = &theme_get_module_acl($g, $m, \%rv);
3512 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3514 Updates the acl hash for some user and module. The parameters are :
3516 =item acl - Hash reference for the new access control options, or undef to clear
3518 =item user - User to update, defaulting to the current user.
3520 =item module - Module to update, defaulting to the caller.
3522 =item never-update-group - Never update the user's group's ACL
3527 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3528 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3529 if (!$_[3] && &foreign_check("acl")) {
3530 # Check if this user is a member of a group, and if he gets the
3531 # module from a group. If so, update its ACL as well
3532 &foreign_require("acl", "acl-lib.pl");
3534 foreach my $g (&acl::list_groups()) {
3535 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3536 &indexof($m, @{$g->{'modules'}}) >= 0) {
3542 &save_group_module_acl($_[0], $group->{'name'}, $m);
3546 my $userdb = &get_userdb_string();
3548 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3549 # Look for this user in the user/group DB
3550 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3551 ref($dbh) || &error(&text('euserdbacl', $dbh));
3552 if ($proto eq "mysql" || $proto eq "postgresql") {
3553 # Find the user in the SQL DB
3554 my $cmd = $dbh->prepare(
3555 "select id from webmin_user where name = ?");
3556 $cmd && $cmd->execute($u) ||
3557 &error(&text('euserdbacl2', $dbh->errstr));
3558 my ($id) = $cmd->fetchrow();
3559 $foundindb = 1 if (defined($id));
3562 # Replace ACLs for user
3564 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3565 "where id = ? and module = ?");
3566 $cmd && $cmd->execute($id, $m) ||
3567 &error(&text('euserdbacl', $dbh->errstr));
3570 my $cmd = $dbh->prepare(
3571 "insert into webmin_user_acl ".
3572 "(id,module,attr,value) values (?,?,?,?)");
3573 $cmd || &error(&text('euserdbacl2',
3575 foreach my $a (keys %{$_[0]}) {
3576 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3577 &error(&text('euserdbacl2',
3584 elsif ($proto eq "ldap") {
3585 # Find the user in LDAP
3586 my $rv = $dbh->search(
3588 filter => '(&(cn='.$u.')(objectClass='.
3589 $args->{'userclass'}.'))',
3591 if (!$rv || $rv->code) {
3592 &error(&text('euserdbacl',
3593 $rv ? $rv->error : "Unknown error"));
3595 my ($user) = $rv->all_entries;
3598 # Find the ACL sub-object for the module
3599 my $ldapm = $m || "global";
3600 my $rv = $dbh->search(
3601 base => $user->dn(),
3602 filter => '(cn='.$ldapm.')',
3604 if (!$rv || $rv->code) {
3605 &error(&text('euserdbacl',
3606 $rv ? $rv->error : "Unknown error"));
3608 my ($acl) = $rv->all_entries;
3611 foreach my $a (keys %{$_[0]}) {
3612 push(@attrs, "webminAclEntry",
3613 $a."=".$_[0]->{$a});
3617 $rv = $dbh->modify($acl->dn(),
3618 replace => { @attrs });
3622 push(@attrs, "cn", $ldapm,
3623 "objectClass", "webminAcl");
3624 $rv = $dbh->add("cn=".$ldapm.",".$user->dn(),
3627 if (!$rv || $rv->code) {
3628 &error(&text('euserdbacl2',
3629 $rv ? $rv->error : "Unknown error"));
3633 &disconnect_userdb($userdb, $dbh);
3637 # Save ACL to local file
3638 if (!-d "$config_directory/$m") {
3639 mkdir("$config_directory/$m", 0755);
3642 &write_file("$config_directory/$m/$u.acl", $_[0]);
3645 &unlink_file("$config_directory/$m/$u.acl");
3650 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3652 Updates the acl hash for some group and module. The parameters are :
3654 =item acl - Hash reference for the new access control options.
3656 =item group - Group name to update.
3658 =item module - Module to update, defaulting to the caller.
3660 =item never-update-group - Never update the parent group's ACL
3663 sub save_group_module_acl
3666 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3667 if (!$_[3] && &foreign_check("acl")) {
3668 # Check if this group is a member of a group, and if it gets the
3669 # module from a group. If so, update the parent ACL as well
3670 &foreign_require("acl", "acl-lib.pl");
3672 foreach my $pg (&acl::list_groups()) {
3673 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3674 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3680 &save_group_module_acl($_[0], $group->{'name'}, $m);
3684 my $userdb = &get_userdb_string();
3687 # Look for this group in the user/group DB
3688 my ($dbh, $proto, $prefix, $args) = &connect_userdb($userdb);
3689 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3690 if ($proto eq "mysql" || $proto eq "postgresql") {
3691 # Find the group in the SQL DB
3692 my $cmd = $dbh->prepare(
3693 "select id from webmin_group where name = ?");
3694 $cmd && $cmd->execute($g) ||
3695 &error(&text('egroupdbacl2', $dbh->errstr));
3696 my ($id) = $cmd->fetchrow();
3697 $foundindb = 1 if (defined($id));
3700 # Replace ACLs for group
3702 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3703 "where id = ? and module = ?");
3704 $cmd && $cmd->execute($id, $m) ||
3705 &error(&text('egroupdbacl', $dbh->errstr));
3708 my $cmd = $dbh->prepare(
3709 "insert into webmin_group_acl ".
3710 "(id,module,attr,value) values (?,?,?,?)");
3711 $cmd || &error(&text('egroupdbacl2',
3713 foreach my $a (keys %{$_[0]}) {
3714 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3715 &error(&text('egroupdbacl2',
3722 elsif ($proto eq "ldap") {
3723 # Find the group in LDAP
3724 my $rv = $dbh->search(
3726 filter => '(&(cn='.$g.')(objectClass='.
3727 $args->{'groupclass'}.'))',
3729 if (!$rv || $rv->code) {
3730 &error(&text('egroupdbacl',
3731 $rv ? $rv->error : "Unknown error"));
3733 my ($group) = $rv->all_entries;
3737 # Find the ACL sub-object for the module
3738 my $rv = $dbh->search(
3739 base => $group->dn(),
3740 filter => '(cn='.$ldapm.')',
3742 if (!$rv || $rv->code) {
3743 &error(&text('egroupdbacl',
3744 $rv ? $rv->error : "Unknown error"));
3746 my ($acl) = $rv->all_entries;
3749 foreach my $a (keys %{$_[0]}) {
3750 push(@attrs, "webminAclEntry",
3751 $a."=".$_[0]->{$a});
3755 $rv = $dbh->modify($acl->dn(),
3756 replace => { @attrs });
3760 push(@attrs, "cn", $ldapm,
3761 "objectClass", "webminAcl");
3762 $rv = $dbh->add("cn=".$ldapm.",".$group->dn(),
3765 if (!$rv || $rv->code) {
3766 &error(&text('egroupdbacl2',
3767 $rv ? $rv->error : "Unknown error"));
3771 &disconnect_userdb($userdb, $dbh);
3775 # Save ACL to local file
3776 if (!-d "$config_directory/$m") {
3777 mkdir("$config_directory/$m", 0755);
3780 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3783 &unlink_file("$config_directory/$m/$g.gacl");
3790 This function must be called by all Webmin CGI scripts, either directly or
3791 indirectly via a per-module lib.pl file. It performs a number of initialization
3792 and housekeeping tasks, such as working out the module name, checking that the
3793 current user has access to the module, and populating global variables. Some
3794 of the variables set include :
3796 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3798 =item $var_directory - Base logs directory, typically /var/webmin
3800 =item %config - Per-module configuration.
3802 =item %gconfig - Global configuration.
3804 =item $scriptname - Base name of the current perl script.
3806 =item $module_name - The name of the current module.
3808 =item $module_config_directory - The config directory for this module.
3810 =item $module_config_file - The config file for this module.
3812 =item $module_root_directory - This module's code directory.
3814 =item $webmin_logfile - The detailed logfile for webmin.
3816 =item $remote_user - The actual username used to login to webmin.
3818 =item $base_remote_user - The username whose permissions are in effect.
3820 =item $current_theme - The theme currently in use.
3822 =item $root_directory - The first root directory of this webmin install.
3824 =item @root_directories - All root directories for this webmin install.
3829 # Record first process ID that called this, so we know when it exited to clean
3831 $main::initial_process_id ||= $$;
3833 # Configuration and spool directories
3834 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3835 die "WEBMIN_CONFIG not set";
3837 $config_directory = $ENV{'WEBMIN_CONFIG'};
3838 if (!defined($ENV{'WEBMIN_VAR'})) {
3839 open(VARPATH, "$config_directory/var-path");
3840 chop($var_directory = <VARPATH>);
3844 $var_directory = $ENV{'WEBMIN_VAR'};
3846 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3847 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3849 if ($ENV{'SESSION_ID'}) {
3850 # Hide this variable from called programs, but keep it for internal use
3851 $main::session_id = $ENV{'SESSION_ID'};
3852 delete($ENV{'SESSION_ID'});
3854 if ($ENV{'REMOTE_PASS'}) {
3855 # Hide the password too
3856 $main::remote_pass = $ENV{'REMOTE_PASS'};
3857 delete($ENV{'REMOTE_PASS'});
3860 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3861 # Looks like we are running setuid, but the real UID hasn't been set.
3862 # Do so now, so that executed programs don't get confused
3867 # Read the webmin global config file. This contains the OS type and version,
3868 # OS specific configuration and global options such as proxy servers
3869 $config_file = "$config_directory/config";
3871 &read_file_cached($config_file, \%gconfig);
3872 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3873 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3875 # If debugging is enabled, open the debug log
3876 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3877 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3878 if ($gconfig{'debug_size'}) {
3879 my @st = stat($dlog);
3880 if ($st[7] > $gconfig{'debug_size'}) {
3881 rename($dlog, $dlog.".0");
3884 open(main::DEBUGLOG, ">>$dlog");
3885 $main::opened_debug_log = 1;
3887 if ($gconfig{'debug_what_start'}) {
3888 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3889 $main::debug_log_start_time = time();
3890 &webmin_debug_log("START", "script=$script_name");
3891 $main::debug_log_start_module = $module_name;
3895 # Set PATH and LD_LIBRARY_PATH
3896 if ($gconfig{'path'}) {
3897 if ($gconfig{'syspath'}) {
3899 $ENV{'PATH'} = $gconfig{'path'};
3903 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3906 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3908 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3909 if ($gconfig{'http_proxy'}) {
3910 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3912 if ($gconfig{'ftp_proxy'}) {
3913 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3915 if ($gconfig{'noproxy'}) {
3916 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3919 # Find all root directories
3921 if (&get_miniserv_config(\%miniserv)) {
3922 @root_directories = ( $miniserv{'root'} );
3923 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3924 push(@root_directories, $miniserv{"extraroot_$i"});
3928 # Work out which module we are in, and read the per-module config file
3929 $0 =~ s/\\/\//g; # Force consistent path on Windows
3930 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3931 # In a foreign call - use the module name given
3932 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3933 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3934 @root_directories = ( $root_directory ) if (!@root_directories);
3936 elsif ($ENV{'SCRIPT_NAME'}) {
3937 my $sn = $ENV{'SCRIPT_NAME'};
3938 $sn =~ s/^$gconfig{'webprefix'}//
3939 if (!$gconfig{'webprefixnoredir'});
3940 if ($sn =~ /^\/([^\/]+)\//) {
3941 # Get module name from CGI path
3944 if ($ENV{'SERVER_ROOT'}) {
3945 $root_directory = $ENV{'SERVER_ROOT'};
3947 elsif ($ENV{'SCRIPT_FILENAME'}) {
3948 $root_directory = $ENV{'SCRIPT_FILENAME'};
3949 $root_directory =~ s/$sn$//;
3951 @root_directories = ( $root_directory ) if (!@root_directories);
3954 # Get root directory from miniserv.conf, and deduce module name from $0
3955 $root_directory = $root_directories[0];
3957 foreach my $r (@root_directories) {
3958 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3959 # Under a module directory
3964 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3970 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3973 # Work out of this is a web, command line or cron job
3974 if (!$main::webmin_script_type) {
3975 if ($ENV{'SCRIPT_NAME'}) {
3977 $main::webmin_script_type = 'web';
3980 # Cron jobs have no TTY
3981 if ($gconfig{'os_type'} eq 'windows' ||
3982 open(DEVTTY, ">/dev/tty")) {
3983 $main::webmin_script_type = 'cmd';
3987 $main::webmin_script_type = 'cron';
3992 # Set the umask based on config
3993 if ($gconfig{'umask'} && !$main::umask_already++) {
3994 umask(oct($gconfig{'umask'}));
3997 # If this is a cron job or other background task, set the nice level
3998 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
4000 if ($gconfig{'nice'}) {
4001 eval 'POSIX::nice($gconfig{\'nice\'});';
4004 # Set IO scheduling class and priority
4005 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
4007 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
4008 if ($gconfig{'sclass'} ne '');
4009 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
4010 if ($gconfig{'sprio'} ne '');
4012 &execute_command("$cmd >/dev/null 2>&1");
4015 $main::nice_already++;
4018 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
4019 $base_remote_user = $u;
4020 $remote_user = $ENV{'REMOTE_USER'};
4022 # Work out if user is definitely in the DB, and if so get his attrs
4023 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
4024 %remote_user_attrs = ( );
4025 if ($remote_user_proto) {
4026 my $userdb = &get_userdb_string();
4027 my ($dbh, $proto) = $userdb ? &connect_userdb($userdb) : ( );
4029 if ($proto eq "mysql" || $proto eq "postgresql") {
4030 # Read attrs from SQL
4031 my $cmd = $dbh->prepare("select webmin_user_attr.attr,webmin_user_attr.value from webmin_user_attr,webmin_user where webmin_user_attr.id = webmin_user.id and webmin_user.name = ?");
4032 if ($cmd && $cmd->execute($base_remote_user)) {
4033 while(my ($attr, $value) = $cmd->fetchrow()) {
4034 $remote_user_attrs{$attr} = $value;
4039 elsif ($proto eq "ldap") {
4040 # XXX read attrs from LDAP
4042 &disconnect_userdb($userdb, $dbh);
4047 # Find and load the configuration file for this module
4048 my (@ruinfo, $rgroup);
4049 $module_config_directory = "$config_directory/$module_name";
4050 if (&get_product_name() eq "usermin" &&
4051 -r "$module_config_directory/config.$remote_user") {
4053 $module_config_file = "$module_config_directory/config.$remote_user";
4055 elsif (&get_product_name() eq "usermin" &&
4056 (@ruinfo = getpwnam($remote_user)) &&
4057 ($rgroup = getgrgid($ruinfo[3])) &&
4058 -r "$module_config_directory/config.\@$rgroup") {
4059 # Based on group name
4060 $module_config_file = "$module_config_directory/config.\@$rgroup";
4064 $module_config_file = "$module_config_directory/config";
4067 &read_file_cached($module_config_file, \%config);
4069 # Fix up windows-specific substitutions in values
4070 foreach my $k (keys %config) {
4071 if ($config{$k} =~ /\$\{systemroot\}/) {
4072 my $root = &get_windows_root();
4073 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4078 # Record the initial module
4079 $main::initial_module_name ||= $module_name;
4081 # Set some useful variables
4083 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4084 $gconfig{'mobile_theme'} :
4085 defined($remote_user_attrs{'theme'}) ?
4086 $remote_user_attrs{'theme'} :
4087 defined($gconfig{'theme_'.$remote_user}) ?
4088 $gconfig{'theme_'.$remote_user} :
4089 defined($gconfig{'theme_'.$base_remote_user}) ?
4090 $gconfig{'theme_'.$base_remote_user} :
4092 @current_themes = split(/\s+/, $current_themes);
4093 $current_theme = $current_themes[0];
4094 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4095 $theme_root_directory = $theme_root_directories[0];
4096 @theme_configs = ( );
4097 foreach my $troot (@theme_root_directories) {
4099 &read_file_cached("$troot/config", \%onetconfig);
4100 &read_file_cached("$troot/config", \%tconfig);
4101 push(@theme_configs, \%onetconfig);
4103 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4104 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4106 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4107 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4109 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4110 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4111 if ($tconfig{'preload_functions'}) {
4112 # Force load of theme functions right now, if requested
4113 &load_theme_library();
4115 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4116 # Load the theme's Webmin:: package classes
4117 do "$theme_root_directory/$tconfig{'oofunctions'}";
4122 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4123 : "$var_directory/webmin.log";
4125 # Load language strings into %text
4126 my @langs = &list_languages();
4128 if ($gconfig{'acceptlang'}) {
4129 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4130 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4132 $accepted_lang = $al->{'lang'};
4137 $current_lang = $force_lang ? $force_lang :
4138 $accepted_lang ? $accepted_lang :
4139 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4140 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4141 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4142 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4143 foreach my $l (@langs) {
4144 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4146 @lang_order_list = &unique($default_lang,
4147 split(/:/, $current_lang_info->{'fallback'}),
4149 %text = &load_language($module_name);
4150 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4152 # Get the %module_info for this module
4154 my ($mi) = grep { $_->{'dir'} eq $module_name }
4155 &get_all_module_infos(2);
4156 %module_info = %$mi;
4157 $module_root_directory = &module_root_directory($module_name);
4160 if ($module_name && !$main::no_acl_check &&
4161 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4162 # Check if the HTTP user can access this module
4163 if (!&foreign_available($module_name)) {
4164 if (!&foreign_check($module_name)) {
4165 &error(&text('emodulecheck',
4166 "<i>$module_info{'desc'}</i>"));
4169 &error(&text('emodule', "<i>$u</i>",
4170 "<i>$module_info{'desc'}</i>"));
4173 $main::no_acl_check++;
4176 # Check the Referer: header for nasty redirects
4177 my @referers = split(/\s+/, $gconfig{'referers'});
4179 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4182 my $http_host = $ENV{'HTTP_HOST'};
4183 $http_host =~ s/:\d+$//;
4184 my $unsafe_index = $unsafe_index_cgi ||
4185 &get_module_variable('$unsafe_index_cgi');
4187 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4188 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4190 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4191 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4192 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4193 ($referer_site && $referer_site ne $http_host &&
4194 &indexof($referer_site, @referers) < 0 ||
4195 !$referer_site && $gconfig{'referers_none'}) &&
4196 !$trust_unknown_referers &&
4197 !&get_module_variable('$trust_unknown_referers')) {
4198 # Looks like a link from elsewhere .. show an error
4199 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4201 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4202 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4203 if ($referer_site) {
4205 print &text('referer_warn',
4206 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
4208 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4209 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4212 # No referer info given
4213 print &text('referer_warn_unknown', $url),"<p>\n";
4214 print &text('referer_fix1u'),"<p>\n";
4215 print &text('referer_fix2u'),"<p>\n";
4219 &footer("/", $text{'index'});
4222 $main::no_referers_check++;
4223 $main::completed_referers_check++;
4225 # Call theme post-init
4226 if (defined(&theme_post_init_config)) {
4227 &theme_post_init_config(@_);
4230 # Record that we have done the calling library in this package
4231 my ($callpkg, $lib) = caller();
4233 $main::done_foreign_require{$callpkg,$lib} = 1;
4235 # If a licence checking is enabled, do it now
4236 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4237 &foreign_check($gconfig{'licence_module'}) &&
4238 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4239 my $oldpwd = &get_current_dir();
4240 $main::done_licence_module_check++;
4241 $main::licence_module = $gconfig{'licence_module'};
4242 &foreign_require($main::licence_module, "licence_check.pl");
4243 ($main::licence_status, $main::licence_message) =
4244 &foreign_call($main::licence_module, "check_licence");
4248 # Export global variables to caller
4249 if ($main::export_to_caller) {
4250 foreach my $v ('$config_file', '%gconfig', '$null_file',
4251 '$path_separator', '@root_directories',
4252 '$root_directory', '$module_name',
4253 '$base_remote_user', '$remote_user',
4254 '$remote_user_proto', '%remote_user_attrs',
4255 '$module_config_directory', '$module_config_file',
4256 '%config', '@current_themes', '$current_theme',
4257 '@theme_root_directories', '$theme_root_directory',
4258 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4259 '$webmin_logfile', '$current_lang',
4260 '$current_lang_info', '@lang_order_list', '%text',
4261 '%module_info', '$module_root_directory') {
4262 my ($vt, $vn) = split('', $v, 2);
4263 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4270 =head2 load_language([module], [directory])
4272 Returns a hashtable mapping text codes to strings in the appropriate language,
4273 based on the $current_lang global variable, which is in turn set based on
4274 the Webmin user's selection. The optional module parameter tells the function
4275 which module to load strings for, and defaults to the calling module. The
4276 optional directory parameter can be used to load strings from a directory
4279 In regular module development you will never need to call this function
4280 directly, as init_config calls it for you, and places the module's strings
4281 into the %text hash.
4287 my $root = $root_directory;
4288 my $ol = $gconfig{'overlang'};
4289 my ($dir) = ($_[1] || "lang");
4291 # Read global lang files
4292 foreach my $o (@lang_order_list) {
4293 my $ok = &read_file_cached("$root/$dir/$o", \%text);
4294 return () if (!$ok && $o eq $default_lang);
4297 foreach my $o (@lang_order_list) {
4298 &read_file_cached("$root/$ol/$o", \%text);
4301 &read_file_cached("$config_directory/custom-lang", \%text);
4304 # Read module's lang files
4305 my $mdir = &module_root_directory($_[0]);
4306 foreach my $o (@lang_order_list) {
4307 &read_file_cached("$mdir/$dir/$o", \%text);
4310 foreach $o (@lang_order_list) {
4311 &read_file_cached("$mdir/$ol/$o", \%text);
4314 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4316 foreach $k (keys %text) {
4317 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4320 if (defined(&theme_load_language)) {
4321 &theme_load_language(\%text, $_[0]);
4326 =head2 text_subs(string)
4328 Used internally by load_language to expand $code substitutions in language
4334 if (substr($_[0], 0, 8) eq "include:") {
4337 open(INCLUDE, substr($_[0], 8));
4345 my $t = $_[1]->{$_[0]};
4346 return defined($t) ? $t : '$'.$_[0];
4350 =head2 text(message, [substitute]+)
4352 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4353 the substitute parameters. This makes it easy to use strings with placeholders
4354 that get replaced with programmatically generated text. For example :
4356 print &text('index_hello', $remote_user),"<p>\n";
4361 my $t = &get_module_variable('%text', 1);
4362 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4363 for(my $i=1; $i<@_; $i++) {
4364 $rv =~ s/\$$i/$_[$i]/g;
4369 =head2 encode_base64(string)
4371 Encodes a string into base64 format, for use in MIME email or HTTP
4372 authorization headers.
4378 pos($_[0]) = 0; # ensure start at the beginning
4379 while ($_[0] =~ /(.{1,57})/gs) {
4380 $res .= substr(pack('u57', $1), 1)."\n";
4383 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4384 my $padding = (3 - length($_[0]) % 3) % 3;
4385 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4389 =head2 decode_base64(string)
4391 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4398 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4399 if (length($str) % 4) {
4402 $str =~ s/=+$//; # remove padding
4403 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4404 while ($str =~ /(.{1,60})/gs) {
4405 my $len = chr(32 + length($1)*3/4); # compute length byte
4406 $res .= unpack("u", $len . $1 ); # uudecode
4411 =head2 get_module_info(module, [noclone], [forcache])
4413 Returns a hash containg details of the given module. Some useful keys are :
4415 =item dir - The module directory, like sendmail.
4417 =item desc - Human-readable description, in the current users' language.
4419 =item version - Optional module version number.
4421 =item os_support - List of supported operating systems and versions.
4423 =item category - Category on Webmin's left menu, like net.
4428 return () if ($_[0] =~ /^\./);
4429 my (%rv, $clone, $o);
4430 my $mdir = &module_root_directory($_[0]);
4431 &read_file_cached("$mdir/module.info", \%rv) || return ();
4433 foreach $o (@lang_order_list) {
4434 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4435 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4437 if ($clone && !$_[1] && $config_directory) {
4438 $rv{'clone'} = $rv{'desc'};
4439 &read_file("$config_directory/$_[0]/clone", \%rv);
4442 my %module_categories;
4443 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4444 my $pn = &get_product_name();
4445 if (defined($rv{'category_'.$pn})) {
4446 # Can override category for webmin/usermin
4447 $rv{'category'} = $rv{'category_'.$pn};
4449 $rv{'realcategory'} = $rv{'category'};
4450 $rv{'category'} = $module_categories{$_[0]}
4451 if (defined($module_categories{$_[0]}));
4453 # Apply description overrides
4454 $rv{'realdesc'} = $rv{'desc'};
4456 &read_file_cached("$config_directory/webmin.descs", \%descs);
4457 if ($descs{$_[0]." ".$current_lang}) {
4458 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4460 elsif ($descs{$_[0]}) {
4461 $rv{'desc'} = $descs{$_[0]};
4465 # Apply per-user description overridde
4466 my %gaccess = &get_module_acl(undef, "");
4467 if ($gaccess{'desc_'.$_[0]}) {
4468 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4472 if ($rv{'longdesc'}) {
4473 # All standard modules have an index.cgi
4474 $rv{'index_link'} = 'index.cgi';
4477 # Call theme-specific override function
4478 if (defined(&theme_get_module_info)) {
4479 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4485 =head2 get_all_module_infos(cachemode)
4487 Returns a list contains the information on all modules in this webmin
4488 install, including clones. Uses caching to reduce the number of module.info
4489 files that need to be read. Each element of the array is a hash reference
4490 in the same format as returned by get_module_info. The cache mode flag can be :
4491 0 = read and write, 1 = don't read or write, 2 = read only
4494 sub get_all_module_infos
4498 # Is the cache out of date? (ie. have any of the root's changed?)
4499 my $cache_file = "$config_directory/module.infos.cache";
4501 if (&read_file_cached($cache_file, \%cache)) {
4502 foreach my $r (@root_directories) {
4504 if ($st[9] != $cache{'mtime_'.$r}) {
4514 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4515 # Can use existing module.info cache
4517 foreach my $k (keys %cache) {
4518 if ($k =~ /^(\S+) (\S+)$/) {
4519 $mods{$1}->{$2} = $cache{$k};
4522 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4525 # Need to rebuild cache
4527 foreach my $r (@root_directories) {
4529 foreach my $m (readdir(DIR)) {
4530 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4531 my %minfo = &get_module_info($m, 0, 1);
4532 next if (!%minfo || !$minfo{'dir'});
4534 foreach $k (keys %minfo) {
4535 $cache{"${m} ${k}"} = $minfo{$k};
4540 $cache{'mtime_'.$r} = $st[9];
4542 $cache{'lang'} = $current_lang;
4543 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4546 # Override descriptions for modules for current user
4547 my %gaccess = &get_module_acl(undef, "");
4548 foreach my $m (@rv) {
4549 if ($gaccess{"desc_".$m->{'dir'}}) {
4550 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4554 # Apply installed flags
4556 &read_file_cached("$config_directory/installed.cache", \%installed);
4557 foreach my $m (@rv) {
4558 $m->{'installed'} = $installed{$m->{'dir'}};
4564 =head2 get_theme_info(theme)
4566 Returns a hash containing a theme's details, taken from it's theme.info file.
4567 Some useful keys are :
4569 =item dir - The theme directory, like blue-theme.
4571 =item desc - Human-readable description, in the current users' language.
4573 =item version - Optional module version number.
4575 =item os_support - List of supported operating systems and versions.
4580 return () if ($_[0] =~ /^\./);
4582 my $tdir = &module_root_directory($_[0]);
4583 &read_file("$tdir/theme.info", \%rv) || return ();
4584 foreach my $o (@lang_order_list) {
4585 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4591 =head2 list_languages
4593 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4594 Each is a hash reference with the following keys :
4596 =item lang - The short language code, like es for Spanish.
4598 =item desc - A human-readable description, in English.
4600 =item charset - An optional character set to use when displaying the language.
4602 =item titles - Set to 1 only if Webmin has title images for the language.
4604 =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.
4609 if (!@main::list_languages_cache) {
4612 open(LANG, "$root_directory/lang_list.txt");
4614 if (/^(\S+)\s+(.*)/) {
4615 my $l = { 'desc' => $2 };
4616 foreach $o (split(/,/, $1)) {
4617 if ($o =~ /^([^=]+)=(.*)$/) {
4621 $l->{'index'} = scalar(@rv);
4622 push(@main::list_languages_cache, $l);
4626 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4627 @main::list_languages_cache;
4629 return @main::list_languages_cache;
4632 =head2 read_env_file(file, &hash)
4634 Similar to Webmin's read_file function, but handles files containing shell
4635 environment variables formatted like :
4640 The file parameter is the full path to the file to read, and hash a Perl hash
4641 ref to read names and values into.
4647 &open_readfile(FILE, $_[0]) || return 0;
4650 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4651 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4652 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4660 =head2 write_env_file(file, &hash, [export])
4662 Writes out a hash to a file in name='value' format, suitable for use in a shell
4663 script. The parameters are :
4665 =item file - Full path for a file to write to
4667 =item hash - Hash reference of names and values to write.
4669 =item export - If set to 1, preceed each variable setting with the word 'export'.
4674 my $exp = $_[2] ? "export " : "";
4675 &open_tempfile(FILE, ">$_[0]");
4676 foreach my $k (keys %{$_[1]}) {
4677 my $v = $_[1]->{$k};
4678 if ($v =~ /^\S+$/) {
4679 &print_tempfile(FILE, "$exp$k=$v\n");
4682 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4685 &close_tempfile(FILE);
4688 =head2 lock_file(filename, [readonly], [forcefile])
4690 Lock a file for exclusive access. If the file is already locked, spin
4691 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4692 to work OK. The parameters are :
4694 =item filename - File or directory to lock.
4696 =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.
4698 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4703 my $realfile = &translate_filename($_[0]);
4704 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4705 my $no_lock = !&can_lock_file($realfile);
4706 my $lock_tries_count = 0;
4709 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4714 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4717 # Create the .lock file
4718 open(LOCKING, ">$realfile.lock") || return 0;
4719 my $lck = eval "flock(LOCKING, 2+4)";
4721 # Lock of lock file failed! Wait till later
4724 print LOCKING $$,"\n";
4725 eval "flock(LOCKING, 8)";
4728 $main::locked_file_list{$realfile} = int($_[1]);
4729 push(@main::temporary_files, "$realfile.lock");
4730 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4731 !&get_module_variable('$no_log_file_changes') &&
4733 # Grab a copy of this file for later diffing
4735 $main::locked_file_data{$realfile} = undef;
4737 $main::locked_file_type{$realfile} = 1;
4738 $main::locked_file_data{$realfile} = '';
4740 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4741 $main::locked_file_type{$realfile} = 2;
4742 $main::locked_file_data{$realfile} = $lnk;
4744 elsif (open(ORIGFILE, $realfile)) {
4745 $main::locked_file_type{$realfile} = 0;
4746 $main::locked_file_data{$realfile} = '';
4749 $main::locked_file_data{$realfile} .=$_;
4758 if ($lock_tries_count++ > 5*60) {
4759 # Give up after 5 minutes
4760 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4766 =head2 unlock_file(filename)
4768 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4769 file changes is enabled, then at unlock file a diff will be taken between the
4770 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4771 called. This can then be viewed in the Webmin Actions Log module.
4776 my $realfile = &translate_filename($_[0]);
4777 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4778 unlink("$realfile.lock") if (&can_lock_file($realfile));
4779 delete($main::locked_file_list{$realfile});
4780 if (exists($main::locked_file_data{$realfile})) {
4781 # Diff the new file with the old
4783 my $lnk = readlink($realfile);
4784 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4785 my $oldtype = $main::locked_file_type{$realfile};
4786 my $new = !defined($main::locked_file_data{$realfile});
4787 if ($new && !-e _) {
4788 # file doesn't exist, and never did! do nothing ..
4790 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4791 # is (or was) a directory ..
4792 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4793 push(@main::locked_file_diff,
4794 { 'type' => 'mkdir', 'object' => $realfile });
4796 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4797 push(@main::locked_file_diff,
4798 { 'type' => 'rmdir', 'object' => $realfile });
4801 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4802 # is (or was) a symlink ..
4803 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4804 push(@main::locked_file_diff,
4805 { 'type' => 'symlink', 'object' => $realfile,
4808 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4809 push(@main::locked_file_diff,
4810 { 'type' => 'unsymlink', 'object' => $realfile,
4811 'data' => $main::locked_file_data{$realfile} });
4813 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4814 push(@main::locked_file_diff,
4815 { 'type' => 'resymlink', 'object' => $realfile,
4820 # is a file, or has changed type?!
4821 my ($diff, $delete_file);
4822 my $type = "modify";
4824 open(NEWFILE, ">$realfile");
4829 if (!defined($main::locked_file_data{$realfile})) {
4832 open(ORIGFILE, ">$realfile.webminorig");
4833 print ORIGFILE $main::locked_file_data{$realfile};
4835 $diff = &backquote_command(
4836 "diff ".quotemeta("$realfile.webminorig")." ".
4837 quotemeta($realfile)." 2>/dev/null");
4838 push(@main::locked_file_diff,
4839 { 'type' => $type, 'object' => $realfile,
4840 'data' => $diff } ) if ($diff);
4841 unlink("$realfile.webminorig");
4842 unlink($realfile) if ($delete_file);
4845 if ($gconfig{'logfullfiles'}) {
4846 # Add file details to list of those to fully log
4847 $main::orig_file_data{$realfile} ||=
4848 $main::locked_file_data{$realfile};
4849 $main::orig_file_type{$realfile} ||=
4850 $main::locked_file_type{$realfile};
4853 delete($main::locked_file_data{$realfile});
4854 delete($main::locked_file_type{$realfile});
4858 =head2 test_lock(file)
4860 Returns 1 if some file is currently locked, 0 if not.
4865 my $realfile = &translate_filename($_[0]);
4866 return 0 if (!$_[0]);
4867 return 1 if (defined($main::locked_file_list{$realfile}));
4868 return 0 if (!&can_lock_file($realfile));
4870 if (open(LOCKING, "$realfile.lock")) {
4875 return $pid && kill(0, $pid);
4878 =head2 unlock_all_files
4880 Unlocks all files locked by the current script.
4883 sub unlock_all_files
4885 foreach $f (keys %main::locked_file_list) {
4890 =head2 can_lock_file(file)
4892 Returns 1 if some file should be locked, based on the settings in the
4893 Webmin Configuration module. For internal use by lock_file only.
4898 if (&is_readonly_mode()) {
4899 return 0; # never lock in read-only mode
4901 elsif ($gconfig{'lockmode'} == 0) {
4904 elsif ($gconfig{'lockmode'} == 1) {
4908 # Check if under any of the directories
4910 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4911 if (&same_file($d, $_[0]) ||
4912 &is_under_directory($d, $_[0])) {
4916 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4920 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4922 Log some action taken by a user. This is typically called at the end of a
4923 script, once all file changes are complete and all commands run. The
4926 =item action - A short code for the action being performed, like 'create'.
4928 =item type - A code for the type of object the action is performed to, like 'user'.
4930 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4932 =item params - A hash ref of additional information about the action.
4934 =item module - Name of the module in which the action was performed, which defaults to the current module.
4936 =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.
4938 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4940 =item client-ip - IP address of the browser that performed the action.
4945 return if (!$gconfig{'log'} || &is_readonly_mode());
4946 my $m = $_[4] ? $_[4] : &get_module_name();
4948 if ($gconfig{'logclear'}) {
4949 # check if it is time to clear the log
4950 my @st = stat("$webmin_logfile.time");
4951 my $write_logtime = 0;
4953 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4954 # clear logfile and all diff files
4955 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4956 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4957 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4958 unlink($webmin_logfile);
4965 if ($write_logtime) {
4966 open(LOGTIME, ">$webmin_logfile.time");
4967 print LOGTIME time(),"\n";
4972 # If an action script directory is defined, call the appropriate scripts
4973 if ($gconfig{'action_script_dir'}) {
4974 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4975 my ($basedir) = $gconfig{'action_script_dir'};
4977 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4980 opendir(DIR, $dir) or die "Can't open $dir: $!";
4981 while (defined($file = readdir(DIR))) {
4982 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4983 if (-x "$dir/$file") {
4984 # Call a script notifying it of the action
4986 $ENV{'ACTION_MODULE'} = &get_module_name();
4987 $ENV{'ACTION_ACTION'} = $_[0];
4988 $ENV{'ACTION_TYPE'} = $_[1];
4989 $ENV{'ACTION_OBJECT'} = $_[2];
4990 $ENV{'ACTION_SCRIPT'} = $script_name;
4991 foreach my $p (keys %param) {
4992 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4994 system("$dir/$file", @_,
4995 "<$null_file", ">$null_file", "2>&1");
5003 # should logging be done at all?
5004 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5005 split(/\s+/, $gconfig{'logusers'})) < 0);
5006 return if ($gconfig{'logmodules'} && &indexof($m,
5007 split(/\s+/, $gconfig{'logmodules'})) < 0);
5011 my @tm = localtime($now);
5012 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5013 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5014 $main::action_id_count++;
5015 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5016 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5017 $tm[2], $tm[1], $tm[0],
5018 $remote_user || '-',
5019 $main::session_id || '-',
5020 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5021 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5022 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5024 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5025 my $v = $_[3]->{$k};
5031 elsif (ref($v) eq 'ARRAY') {
5035 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5036 $line .= " $k='$vv'";
5040 foreach $vv (split(/\0/, $v)) {
5042 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5043 $line .= " $k='$vv'";
5046 $param{$k} = join(" ", @pv);
5048 open(WEBMINLOG, ">>$webmin_logfile");
5049 print WEBMINLOG $line,"\n";
5051 if ($gconfig{'logperms'}) {
5052 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5055 chmod(0600, $webmin_logfile);
5058 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5059 # Find and record the changes made to any locked files, or commands run
5061 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5062 foreach my $d (@main::locked_file_diff) {
5063 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
5064 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
5065 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5066 print DIFFLOG $d->{'data'};
5068 if ($d->{'input'}) {
5069 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5070 print DIFFLOG $d->{'input'};
5073 if ($gconfig{'logperms'}) {
5074 chmod(oct($gconfig{'logperms'}),
5075 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
5076 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5080 @main::locked_file_diff = undef;
5082 if ($gconfig{'logfullfiles'}) {
5083 # Save the original contents of any modified files
5085 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5086 foreach my $f (keys %main::orig_file_data) {
5087 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
5088 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
5089 if (!defined($main::orig_file_type{$f})) {
5090 print ORIGLOG -1," ",$f,"\n";
5093 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5095 print ORIGLOG $main::orig_file_data{$f};
5097 if ($gconfig{'logperms'}) {
5098 chmod(oct($gconfig{'logperms'}),
5099 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
5103 %main::orig_file_data = undef;
5104 %main::orig_file_type = undef;
5108 if ($gconfig{'logsyslog'}) {
5109 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5110 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5111 setlogsock("inet");';
5113 # Syslog module is installed .. try to convert to a
5114 # human-readable form
5116 my $mod = &get_module_name();
5117 my $mdir = module_root_directory($mod);
5118 if (-r "$mdir/log_parser.pl") {
5119 &foreign_require($mod, "log_parser.pl");
5121 foreach my $k (keys %{$_[3]}) {
5122 my $v = $_[3]->{$k};
5123 if (ref($v) eq 'ARRAY') {
5124 $params{$k} = join("\0", @$v);
5130 $msg = &foreign_call($mod, "parse_webmin_log",
5131 $remote_user, $script_name,
5132 $_[0], $_[1], $_[2], \%params);
5133 $msg =~ s/<[^>]*>//g; # Remove tags
5135 elsif ($_[0] eq "_config_") {
5136 my %wtext = &load_language("webminlog");
5137 $msg = $wtext{'search_config'};
5139 $msg ||= "$_[0] $_[1] $_[2]";
5140 my %info = &get_module_info($m);
5141 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5146 =head2 additional_log(type, object, data, [input])
5148 Records additional log data for an upcoming call to webmin_log, such
5149 as a command that was run or SQL that was executed. Typically you will never
5150 need to call this function directory.
5155 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5156 push(@main::locked_file_diff,
5157 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5158 'input' => $_[3] } );
5162 =head2 webmin_debug_log(type, message)
5164 Write something to the Webmin debug log. For internal use only.
5167 sub webmin_debug_log
5169 my ($type, $msg) = @_;
5170 return 0 if (!$main::opened_debug_log);
5171 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5172 if ($gconfig{'debug_modules'}) {
5173 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5174 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5177 my @tm = localtime($now);
5179 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
5180 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5181 $tm[2], $tm[1], $tm[0],
5182 $remote_user || "-",
5183 $ENV{'REMOTE_HOST'} || "-",
5184 &get_module_name() || "-",
5187 seek(main::DEBUGLOG, 0, 2);
5188 print main::DEBUGLOG $line."\n";
5192 =head2 system_logged(command)
5194 Just calls the Perl system() function, but also logs the command run.
5199 if (&is_readonly_mode()) {
5200 print STDERR "Vetoing command $_[0]\n";
5203 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5204 my $cmd = join(" ", @realcmd);
5206 if ($cmd =~ s/(\s*&\s*)$//) {
5209 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5210 $cmd =~ s/^\((.*)\)\s*$/$1/;
5212 &additional_log('exec', undef, $cmd);
5213 return system(@realcmd);
5216 =head2 backquote_logged(command)
5218 Executes a command and returns the output (like `command`), but also logs it.
5221 sub backquote_logged
5223 if (&is_readonly_mode()) {
5225 print STDERR "Vetoing command $_[0]\n";
5228 my $realcmd = &translate_command($_[0]);
5231 if ($cmd =~ s/(\s*&\s*)$//) {
5234 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5235 $cmd =~ s/^\((.*)\)\s*$/$1/;
5237 &additional_log('exec', undef, $cmd);
5238 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5242 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5244 Runs some command, waiting at most the given number of seconds for it to
5245 complete, and returns the output. The maxlines parameter sets the number
5246 of lines of output to capture. The safe parameter should be set to 1 if the
5247 command is safe for read-only mode users to run.
5250 sub backquote_with_timeout
5252 my $realcmd = &translate_command($_[0]);
5253 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5254 if ($gconfig{'debug_what_cmd'});
5256 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5261 my $elapsed = time() - $start;
5262 last if ($elapsed > $_[1]);
5264 vec($rmask, fileno(OUT), 1) = 1;
5265 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5266 last if (!$sel || $sel < 0);
5268 last if (!defined($line));
5271 if ($_[3] && $linecount >= $_[3]) {
5276 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5280 return wantarray ? ($out, $timed_out) : $out;
5283 =head2 backquote_command(command, safe?)
5285 Executes a command and returns the output (like `command`), subject to
5286 command translation. The safe parameter should be set to 1 if the command
5287 is safe for read-only mode users to run.
5290 sub backquote_command
5292 if (&is_readonly_mode() && !$_[1]) {
5293 print STDERR "Vetoing command $_[0]\n";
5297 my $realcmd = &translate_command($_[0]);
5298 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5302 =head2 kill_logged(signal, pid, ...)
5304 Like Perl's built-in kill function, but also logs the fact that some process
5305 was killed. On Windows, falls back to calling process.exe to terminate a
5311 return scalar(@_)-1 if (&is_readonly_mode());
5312 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5313 if ($gconfig{'debug_what_procs'});
5314 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5315 if ($gconfig{'os_type'} eq 'windows') {
5316 # Emulate some kills with process.exe
5317 my $arg = $_[0] eq "KILL" ? "-k" :
5318 $_[0] eq "TERM" ? "-q" :
5319 $_[0] eq "STOP" ? "-s" :
5320 $_[0] eq "CONT" ? "-r" : undef;
5322 foreach my $p (@_[1..@_-1]) {
5324 $ok ||= kill($_[0], $p);
5327 &execute_command("process $arg $p");
5339 =head2 rename_logged(old, new)
5341 Re-names a file and logs the rename. If the old and new files are on different
5342 filesystems, calls mv or the Windows rename function to do the job.
5347 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5348 return &rename_file($_[0], $_[1]);
5351 =head2 rename_file(old, new)
5353 Renames a file or directory. If the old and new files are on different
5354 filesystems, calls mv or the Windows rename function to do the job.
5359 if (&is_readonly_mode()) {
5360 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5363 my $src = &translate_filename($_[0]);
5364 my $dst = &translate_filename($_[1]);
5365 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5366 if ($gconfig{'debug_what_ops'});
5367 my $ok = rename($src, $dst);
5368 if (!$ok && $! !~ /permission/i) {
5369 # Try the mv command, in case this is a cross-filesystem rename
5370 if ($gconfig{'os_type'} eq 'windows') {
5371 # Need to use rename
5372 my $out = &backquote_command("rename ".quotemeta($_[0]).
5373 " ".quotemeta($_[1])." 2>&1");
5375 $! = $out if (!$ok);
5379 my $out = &backquote_command("mv ".quotemeta($_[0]).
5380 " ".quotemeta($_[1])." 2>&1");
5382 $! = $out if (!$ok);
5388 =head2 symlink_logged(src, dest)
5390 Create a symlink, and logs it. Effectively does the same thing as the Perl
5397 my $rv = &symlink_file($_[0], $_[1]);
5398 &unlock_file($_[1]);
5402 =head2 symlink_file(src, dest)
5404 Creates a soft link, unless in read-only mode. Effectively does the same thing
5405 as the Perl symlink function.
5410 if (&is_readonly_mode()) {
5411 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5414 my $src = &translate_filename($_[0]);
5415 my $dst = &translate_filename($_[1]);
5416 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5417 if ($gconfig{'debug_what_ops'});
5418 return symlink($src, $dst);
5421 =head2 link_file(src, dest)
5423 Creates a hard link, unless in read-only mode. The existing new link file
5424 will be deleted if necessary. Effectively the same as Perl's link function.
5429 if (&is_readonly_mode()) {
5430 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5433 my $src = &translate_filename($_[0]);
5434 my $dst = &translate_filename($_[1]);
5435 &webmin_debug_log('LINK', "src=$src dst=$dst")
5436 if ($gconfig{'debug_what_ops'});
5437 unlink($dst); # make sure link works
5438 return link($src, $dst);
5441 =head2 make_dir(dir, perms, recursive)
5443 Creates a directory and sets permissions on it, unless in read-only mode.
5444 The perms parameter sets the octal permissions to apply, which unlike Perl's
5445 mkdir will really get set. The recursive flag can be set to 1 to have the
5446 function create parent directories too.
5451 my ($dir, $perms, $recur) = @_;
5452 if (&is_readonly_mode()) {
5453 print STDERR "Vetoing directory $dir\n";
5456 $dir = &translate_filename($dir);
5457 my $exists = -d $dir ? 1 : 0;
5458 return 1 if ($exists && $recur); # already exists
5459 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5460 my $rv = mkdir($dir, $perms);
5461 if (!$rv && $recur) {
5462 # Failed .. try mkdir -p
5463 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5464 my $ex = &execute_command("mkdir $param "."e_path($dir));
5470 chmod($perms, $dir);
5475 =head2 set_ownership_permissions(user, group, perms, file, ...)
5477 Sets the user, group owner and permissions on some files. The parameters are :
5479 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5481 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5483 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5485 =item file - One or more files or directories to modify.
5488 sub set_ownership_permissions
5490 my ($user, $group, $perms, @files) = @_;
5491 if (&is_readonly_mode()) {
5492 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5495 @files = map { &translate_filename($_) } @files;
5496 if ($gconfig{'debug_what_ops'}) {
5497 foreach my $f (@files) {
5498 &webmin_debug_log('PERMS',
5499 "file=$f user=$user group=$group perms=$perms");
5503 if (defined($user)) {
5504 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5506 if (defined($group)) {
5507 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5510 my @uinfo = getpwuid($uid);
5513 $rv = chown($uid, $gid, @files);
5515 if ($rv && defined($perms)) {
5516 $rv = chmod($perms, @files);
5521 =head2 unlink_logged(file, ...)
5523 Like Perl's unlink function, but locks the files beforehand and un-locks them
5524 after so that the deletion is logged by Webmin.
5530 foreach my $f (@_) {
5531 if (!&test_lock($f)) {
5536 my @rv = &unlink_file(@_);
5537 foreach my $f (@_) {
5542 return wantarray ? @rv : $rv[0];
5545 =head2 unlink_file(file, ...)
5547 Deletes some files or directories. Like Perl's unlink function, but also
5548 recursively deletes directories with the rm command if needed.
5553 return 1 if (&is_readonly_mode());
5556 foreach my $f (@_) {
5557 &unflush_file_lines($f);
5558 my $realf = &translate_filename($f);
5559 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5561 if (!rmdir($realf)) {
5563 if ($gconfig{'os_type'} eq 'windows') {
5564 # Call del and rmdir commands
5567 my $out = `del /q "$qm" 2>&1`;
5569 $out = `rmdir "$qm" 2>&1`;
5574 my $qm = quotemeta($realf);
5575 $out = `rm -rf $qm 2>&1`;
5584 if (!unlink($realf)) {
5590 return wantarray ? ($rv, $err) : $rv;
5593 =head2 copy_source_dest(source, dest)
5595 Copy some file or directory to a new location. Returns 1 on success, or 0
5596 on failure - also sets $! on failure. If the source is a directory, uses
5597 piped tar commands to copy a whole directory structure including permissions
5601 sub copy_source_dest
5603 return (1, undef) if (&is_readonly_mode());
5604 my ($src, $dst) = @_;
5607 &webmin_debug_log('COPY', "src=$src dst=$dst")
5608 if ($gconfig{'debug_what_ops'});
5609 if ($gconfig{'os_type'} eq 'windows') {
5610 # No tar or cp on windows, so need to use copy command
5614 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5617 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5625 # A directory .. need to copy with tar command
5626 my @st = stat($src);
5629 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5630 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5637 # Can just copy with cp
5638 my $out = &backquote_logged("cp -p ".quotemeta($src).
5639 " ".quotemeta($dst)." 2>&1");
5645 return wantarray ? ($ok, $err) : $ok;
5648 =head2 remote_session_name(host|&server)
5650 Generates a session ID for some server. For this server, this will always
5651 be an empty string. For a server object it will include the hostname and
5652 port and PID. For a server name, it will include the hostname and PID. For
5656 sub remote_session_name
5658 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5659 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5660 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5661 ref($_[0]) ? "" : "$_[0].$$";
5664 =head2 remote_foreign_require(server, module, file)
5666 Connects to rpc.cgi on a remote webmin server and have it open a session
5667 to a process that will actually do the require and run functions. This is the
5668 equivalent for foreign_require, but for a remote Webmin system. The server
5669 parameter can either be a hostname of a system registered in the Webmin
5670 Servers Index module, or a hash reference for a system from that module.
5673 sub remote_foreign_require
5675 my $call = { 'action' => 'require',
5678 my $sn = &remote_session_name($_[0]);
5679 if ($remote_session{$sn}) {
5680 $call->{'session'} = $remote_session{$sn};
5683 $call->{'newsession'} = 1;
5685 my $rv = &remote_rpc_call($_[0], $call);
5686 if ($rv->{'session'}) {
5687 $remote_session{$sn} = $rv->{'session'};
5688 $remote_session_server{$sn} = $_[0];
5692 =head2 remote_foreign_call(server, module, function, [arg]*)
5694 Call a function on a remote server. Must have been setup first with
5695 remote_foreign_require for the same server and module. Equivalent to
5696 foreign_call, but with the extra server parameter to specify the remote
5700 sub remote_foreign_call
5702 return undef if (&is_readonly_mode());
5703 my $sn = &remote_session_name($_[0]);
5704 return &remote_rpc_call($_[0], { 'action' => 'call',
5707 'session' => $remote_session{$sn},
5708 'args' => [ @_[3 .. $#_] ] } );
5711 =head2 remote_foreign_check(server, module, [api-only])
5713 Checks if some module is installed and supported on a remote server. Equivilant
5714 to foreign_check, but for the remote Webmin system specified by the server
5718 sub remote_foreign_check
5720 return &remote_rpc_call($_[0], { 'action' => 'check',
5725 =head2 remote_foreign_config(server, module)
5727 Gets the configuration for some module from a remote server, as a hash.
5728 Equivalent to foreign_config, but for a remote system.
5731 sub remote_foreign_config
5733 return &remote_rpc_call($_[0], { 'action' => 'config',
5734 'module' => $_[1] });
5737 =head2 remote_eval(server, module, code)
5739 Evaluates some perl code in the context of a module on a remote webmin server.
5740 The server parameter must be the hostname of a remote system, module must
5741 be a module directory name, and code a string of Perl code to run. This can
5742 only be called after remote_foreign_require for the same server and module.
5747 return undef if (&is_readonly_mode());
5748 my $sn = &remote_session_name($_[0]);
5749 return &remote_rpc_call($_[0], { 'action' => 'eval',
5752 'session' => $remote_session{$sn} });
5755 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5757 Transfers some local file to another server via Webmin's RPC protocol, and
5758 returns the resulting remote filename. If the remotefile parameter is given,
5759 that is the destination filename which will be used. Otherwise a randomly
5760 selected temporary filename will be used, and returned by the function.
5765 return undef if (&is_readonly_mode());
5767 my $sn = &remote_session_name($_[0]);
5768 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5769 # Copy data over TCP connection
5770 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5772 'name' => $_[3] } );
5774 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5775 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5776 return &$main::remote_error_handler("Failed to transfer file : $error")
5779 while(read(FILE, $got, 1024) > 0) {
5783 shutdown(TWRITE, 1);
5785 if ($error && $error !~ /^OK/) {
5786 # Got back an error!
5787 return &$main::remote_error_handler("Failed to transfer file : $error");
5793 # Just pass file contents as parameters
5795 while(read(FILE, $got, 1024) > 0) {
5799 return &remote_rpc_call($_[0], { 'action' => 'write',
5802 'session' => $remote_session{$sn} });
5806 =head2 remote_read(server, localfile, remotefile)
5808 Transfers a file from a remote server to this system, using Webmin's RPC
5809 protocol. The server parameter must be the hostname of a system registered
5810 in the Webmin Servers Index module, localfile is the destination path on this
5811 system, and remotefile is the file to fetch from the remote server.
5816 my $sn = &remote_session_name($_[0]);
5817 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5818 # Copy data over TCP connection
5819 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5820 'file' => $_[2] } );
5822 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5825 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5826 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5827 return &$main::remote_error_handler("Failed to transfer file : $error")
5830 open(FILE, ">$_[1]");
5831 while(read(TREAD, $got, 1024) > 0) {
5838 # Just get data as return value
5839 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5841 'session' => $remote_session{$sn} });
5842 open(FILE, ">$_[1]");
5848 =head2 remote_finished
5850 Close all remote sessions. This happens automatically after a while
5851 anyway, but this function should be called to clean things up faster.
5856 foreach my $sn (keys %remote_session) {
5857 my $server = $remote_session_server{$sn};
5858 &remote_rpc_call($server, { 'action' => 'quit',
5859 'session' => $remote_session{$sn} } );
5860 delete($remote_session{$sn});
5861 delete($remote_session_server{$sn});
5863 foreach $fh (keys %fast_fh_cache) {
5865 delete($fast_fh_cache{$fh});
5869 =head2 remote_error_setup(&function)
5871 Sets a function to be called instead of &error when a remote RPC operation
5872 fails. Useful if you want to have more control over your remote operations.
5875 sub remote_error_setup
5877 $main::remote_error_handler = $_[0] || \&error;
5880 =head2 remote_rpc_call(server, structure)
5882 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5883 and then reads back a reply structure. This is mainly for internal use only,
5884 and is called by the other remote_* functions.
5890 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5892 # Server structure was given
5894 $serv->{'user'} || $serv->{'id'} == 0 ||
5895 return &$main::remote_error_handler(
5896 "No Webmin login set for server");
5899 # lookup the server in the webmin servers module if needed
5900 if (!%main::remote_servers_cache) {
5901 &foreign_require("servers", "servers-lib.pl");
5902 foreach $s (&foreign_call("servers", "list_servers")) {
5903 $main::remote_servers_cache{$s->{'host'}} = $s;
5904 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5907 $serv = $main::remote_servers_cache{$_[0]};
5908 $serv || return &$main::remote_error_handler(
5909 "No Webmin Servers entry for $_[0]");
5910 $serv->{'user'} || return &$main::remote_error_handler(
5911 "No login set for server $_[0]");
5913 my $ip = $serv->{'ip'} || $serv->{'host'};
5915 # Work out the username and password
5917 if ($serv->{'sameuser'}) {
5918 $user = $remote_user;
5919 defined($main::remote_pass) || return &$main::remote_error_handler(
5920 "Password for this server is not available");
5921 $pass = $main::remote_pass;
5924 $user = $serv->{'user'};
5925 $pass = $serv->{'pass'};
5928 if ($serv->{'fast'} || !$sn) {
5929 # Make TCP connection call to fastrpc.cgi
5930 if (!$fast_fh_cache{$sn} && $sn) {
5931 # Need to open the connection
5932 my $con = &make_http_connection(
5933 $ip, $serv->{'port'}, $serv->{'ssl'},
5934 "POST", "/fastrpc.cgi");
5935 return &$main::remote_error_handler(
5936 "Failed to connect to $serv->{'host'} : $con")
5938 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5939 &write_http_connection($con, "User-agent: Webmin\r\n");
5940 my $auth = &encode_base64("$user:$pass");
5942 &write_http_connection($con, "Authorization: basic $auth\r\n");
5943 &write_http_connection($con, "Content-length: ",
5944 length($tostr),"\r\n");
5945 &write_http_connection($con, "\r\n");
5946 &write_http_connection($con, $tostr);
5948 # read back the response
5949 my $line = &read_http_connection($con);
5950 $line =~ tr/\r\n//d;
5951 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5952 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5954 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5955 return &$main::remote_error_handler("HTTP error : $line");
5957 $line = &read_http_connection($con);
5958 $line =~ tr/\r\n//d;
5960 $line = &read_http_connection($con);
5961 if ($line =~ /^0\s+(.*)/) {
5962 return &$main::remote_error_handler("RPC error : $1");
5964 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5965 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5966 # Started ok .. connect and save SID
5967 &close_http_connection($con);
5968 my ($port, $sid, $version, $error) = ($1, $2, $3);
5969 &open_socket($ip, $port, $sid, \$error);
5970 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5972 $fast_fh_cache{$sn} = $sid;
5973 $remote_server_version{$sn} = $version;
5976 while($stuff = &read_http_connection($con)) {
5979 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5982 elsif (!$fast_fh_cache{$sn}) {
5983 # Open the connection by running fastrpc.cgi locally
5984 pipe(RPCOUTr, RPCOUTw);
5988 open(STDOUT, ">&RPCOUTw");
5992 $ENV{'REQUEST_METHOD'} = 'GET';
5993 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5994 $ENV{'SERVER_ROOT'} ||= $root_directory;
5996 if ($base_remote_user ne 'root' &&
5997 $base_remote_user ne 'admin') {
5998 # Need to fake up a login for the CGI!
5999 &read_acl(undef, \%acl);
6000 $ENV{'BASE_REMOTE_USER'} =
6001 $ENV{'REMOTE_USER'} =
6002 $acl{'root'} ? 'root' : 'admin';
6004 delete($ENV{'FOREIGN_MODULE_NAME'});
6005 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6006 chdir($root_directory);
6007 if (!exec("$root_directory/fastrpc.cgi")) {
6008 print "exec failed : $!\n";
6015 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6019 if ($line =~ /^0\s+(.*)/) {
6020 return &$main::remote_error_handler("RPC error : $2");
6022 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6023 # Started ok .. connect and save SID
6025 my ($port, $sid, $error) = ($1, $2, undef);
6026 &open_socket("localhost", $port, $sid, \$error);
6027 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6028 $fast_fh_cache{$sn} = $sid;
6035 &error("Bad response from fastrpc.cgi : $line");
6038 # Got a connection .. send off the request
6039 my $fh = $fast_fh_cache{$sn};
6040 my $tostr = &serialise_variable($_[1]);
6041 print $fh length($tostr)," $fh\n";
6043 my $rlen = int(<$fh>);
6044 my ($fromstr, $got);
6045 while(length($fromstr) < $rlen) {
6046 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
6047 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6050 my $from = &unserialise_variable($fromstr);
6052 return &$main::remote_error_handler("Remote Webmin error");
6054 if (defined($from->{'arv'})) {
6055 return @{$from->{'arv'}};
6058 return $from->{'rv'};
6062 # Call rpc.cgi on remote server
6063 my $tostr = &serialise_variable($_[1]);
6065 my $con = &make_http_connection($ip, $serv->{'port'},
6066 $serv->{'ssl'}, "POST", "/rpc.cgi");
6067 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6069 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6070 &write_http_connection($con, "User-agent: Webmin\r\n");
6071 my $auth = &encode_base64("$user:$pass");
6073 &write_http_connection($con, "Authorization: basic $auth\r\n");
6074 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6075 &write_http_connection($con, "\r\n");
6076 &write_http_connection($con, $tostr);
6078 # read back the response
6079 my $line = &read_http_connection($con);
6080 $line =~ tr/\r\n//d;
6081 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6082 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6084 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6086 $line = &read_http_connection($con);
6087 $line =~ tr/\r\n//d;
6090 while($line = &read_http_connection($con)) {
6094 my $from = &unserialise_variable($fromstr);
6095 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6096 if (defined($from->{'arv'})) {
6097 return @{$from->{'arv'}};
6100 return $from->{'rv'};
6105 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6107 Executes some function in parallel on multiple servers at once. Fills in
6108 the returns and errors arrays respectively. If the module and library
6109 parameters are given, that module is remotely required on the server first,
6110 to check if it is connectable. The parameters are :
6112 =item servers - A list of Webmin system hash references.
6114 =item parallel - Number of parallel operations to perform.
6116 =item function - Reference to function to call for each system.
6118 =item args - Additional parameters to the function.
6120 =item returns - Array ref to place return values into, in same order as servers.
6122 =item errors - Array ref to place error messages into.
6124 =item module - Optional module to require on the remote system first.
6126 =item library - Optional library to require in the module.
6129 sub remote_multi_callback
6131 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6132 &remote_error_setup(\&remote_multi_callback_error);
6134 # Call the functions
6136 foreach my $g (@$servs) {
6142 $remote_multi_callback_err = undef;
6144 # Require the remote lib
6145 &remote_foreign_require($g->{'host'}, $mod, $lib);
6146 if ($remote_multi_callback_err) {
6147 # Failed .. return error
6148 print $wh &serialise_variable(
6149 [ undef, $remote_multi_callback_err ]);
6155 my $a = ref($args) ? $args->[$p] : $args;
6156 my $rv = &$func($g, $a);
6159 print $wh &serialise_variable(
6160 [ $rv, $remote_multi_callback_err ]);
6168 # Read back the results
6170 foreach my $g (@$servs) {
6174 $errs->[$p] = "Failed to read response from $g->{'host'}";
6177 my $rv = &unserialise_variable($line);
6179 $rets->[$p] = $rv->[0];
6180 $errs->[$p] = $rv->[1];
6185 &remote_error_setup(undef);
6188 sub remote_multi_callback_error
6190 $remote_multi_callback_err = $_[0];
6193 =head2 serialise_variable(variable)
6195 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6196 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6197 called on each member to serialize the entire object.
6200 sub serialise_variable
6202 if (!defined($_[0])) {
6208 $rv = &urlize($_[0]);
6210 elsif ($r eq 'SCALAR') {
6211 $rv = &urlize(${$_[0]});
6213 elsif ($r eq 'ARRAY') {
6214 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6216 elsif ($r eq 'HASH') {
6217 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6218 &urlize(&serialise_variable($_[0]->{$_})) }
6221 elsif ($r eq 'REF') {
6222 $rv = &serialise_variable(${$_[0]});
6224 elsif ($r eq 'CODE') {
6229 # An object - treat as a hash
6230 $r = "OBJECT ".&urlize($r);
6231 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6232 &urlize(&serialise_variable($_[0]->{$_})) }
6235 return ($r ? $r : 'VAL').",".$rv;
6238 =head2 unserialise_variable(string)
6240 Converts a string created by serialise_variable() back into the original
6241 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6242 object, the same class is used on this system, if available.
6245 sub unserialise_variable
6247 my @v = split(/,/, $_[0]);
6249 if ($v[0] eq 'VAL') {
6250 @v = split(/,/, $_[0], -1);
6251 $rv = &un_urlize($v[1]);
6253 elsif ($v[0] eq 'SCALAR') {
6254 local $r = &un_urlize($v[1]);
6257 elsif ($v[0] eq 'ARRAY') {
6259 for(my $i=1; $i<@v; $i++) {
6260 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6263 elsif ($v[0] eq 'HASH') {
6265 for(my $i=1; $i<@v; $i+=2) {
6266 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6267 &unserialise_variable(&un_urlize($v[$i+1]));
6270 elsif ($v[0] eq 'REF') {
6271 local $r = &unserialise_variable($v[1]);
6274 elsif ($v[0] eq 'UNDEF') {
6277 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6278 # An object hash that we have to re-bless
6281 for(my $i=1; $i<@v; $i+=2) {
6282 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6283 &unserialise_variable(&un_urlize($v[$i+1]));
6291 =head2 other_groups(user)
6293 Returns a list of secondary groups a user is a member of, as a list of
6302 while(my @g = getgrent()) {
6303 my @m = split(/\s+/, $g[3]);
6304 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6306 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6310 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6312 Returns HTML for a button that pops up a data chooser window. The parameters
6315 =item dayfield - Name of the text field to place the day of the month into.
6317 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6319 =item yearfield - Name of the text field to place the year into.
6322 sub date_chooser_button
6324 return &theme_date_chooser_button(@_)
6325 if (defined(&theme_date_chooser_button));
6326 my ($w, $h) = (250, 225);
6327 if ($gconfig{'db_sizedate'}) {
6328 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6330 return "<input type=button onClick='window.dfield = form.$_[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";
6333 =head2 help_file(module, file)
6335 Returns the path to a module's help file of some name, typically under the
6336 help directory with a .html extension.
6341 my $mdir = &module_root_directory($_[0]);
6342 my $dir = "$mdir/help";
6343 foreach my $o (@lang_order_list) {
6344 my $lang = "$dir/$_[1].$o.html";
6345 return $lang if (-r $lang);
6347 return "$dir/$_[1].html";
6352 Seeds the random number generator, if not already done in this script. On Linux
6353 this makes use of the current time, process ID and a read from /dev/urandom.
6354 On other systems, only the current time and process ID are used.
6359 if (!$main::done_seed_random) {
6360 if (open(RANDOM, "/dev/urandom")) {
6362 read(RANDOM, $buf, 4);
6364 srand(time() ^ $$ ^ $buf);
6369 $main::done_seed_random = 1;
6373 =head2 disk_usage_kb(directory)
6375 Returns the number of kB used by some directory and all subdirs. Implemented
6376 by calling the C<du -k> command.
6381 my $dir = &translate_filename($_[0]);
6383 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6385 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6387 return $out =~ /^([0-9]+)/ ? $1 : "???";
6390 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6392 Returns the number of bytes taken up by all files in some directory and all
6393 sub-directories, by summing up their lengths. The disk_usage_kb is more
6394 reflective of reality, as the filesystem typically pads file sizes to 1k or
6398 sub recursive_disk_usage
6400 my $dir = &translate_filename($_[0]);
6407 my @st = stat($dir);
6413 my @files = readdir(DIR);
6415 foreach my $f (@files) {
6416 next if ($f eq "." || $f eq "..");
6417 next if ($skip && $f =~ /$skip/);
6418 next if ($only && $f !~ /$only/);
6419 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6425 =head2 help_search_link(term, [ section, ... ] )
6427 Returns HTML for a link to the man module for searching local and online
6428 docs for various search terms. The term parameter can either be a single
6429 word like 'bind', or a space-separated list of words. This function is typically
6430 used by modules that want to refer users to additional documentation in man
6431 pages or local system doc files.
6434 sub help_search_link
6436 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6437 my $for = &urlize(shift(@_));
6438 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6439 join("&", map { "section=$_" } @_)."&".
6440 "for=$for&exact=1&check=".&get_module_name()."'>".
6441 $text{'helpsearch'}."</a>\n";
6448 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6450 Opens a connection to some HTTP server, maybe through a proxy, and returns
6451 a handle object. The handle can then be used to send additional headers
6452 and read back a response. If anything goes wrong, returns an error string.
6453 The parameters are :
6455 =item host - Hostname or IP address of the webserver to connect to.
6457 =item port - HTTP port number to connect to.
6459 =item ssl - Set to 1 to connect in SSL mode.
6461 =item method - HTTP method, like GET or POST.
6463 =item page - Page to request on the webserver, like /foo/index.html
6465 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6468 sub make_http_connection
6470 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6473 foreach my $h (@$headers) {
6474 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6478 if (&is_readonly_mode()) {
6479 return "HTTP connections not allowed in readonly mode";
6481 my $rv = { 'fh' => time().$$ };
6484 eval "use Net::SSLeay";
6485 $@ && return $text{'link_essl'};
6486 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6487 eval "Net::SSLeay::load_error_strings()";
6488 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6489 return "Failed to create SSL context";
6490 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6491 return "Failed to create SSL connection";
6493 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6494 !&no_proxy($host)) {
6497 &open_socket($1, $2, $rv->{'fh'}, \$error);
6500 my $fh = $rv->{'fh'};
6501 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6502 if ($gconfig{'proxy_user'}) {
6503 my $auth = &encode_base64(
6504 "$gconfig{'proxy_user'}:".
6505 "$gconfig{'proxy_pass'}");
6506 $auth =~ tr/\r\n//d;
6507 print $fh "Proxy-Authorization: Basic $auth\r\n";
6511 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6512 return "Proxy error : $3" if ($2 != 200);
6515 return "Proxy error : $line";
6520 elsif (!$gconfig{'proxy_fallback'}) {
6521 # Connection to proxy failed - give up
6528 &open_socket($host, $port, $rv->{'fh'}, \$error);
6529 return $error if ($error);
6531 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6532 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6533 return "SSL connect() failed";
6534 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6535 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6538 # Plain HTTP request
6540 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6541 !&no_proxy($host)) {
6544 &open_socket($1, $2, $rv->{'fh'}, \$error);
6548 my $fh = $rv->{'fh'};
6549 my $rtxt = $method." ".
6550 "http://$host:$port$page HTTP/1.0\r\n";
6551 if ($gconfig{'proxy_user'}) {
6552 my $auth = &encode_base64(
6553 "$gconfig{'proxy_user'}:".
6554 "$gconfig{'proxy_pass'}");
6555 $auth =~ tr/\r\n//d;
6556 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6561 elsif (!$gconfig{'proxy_fallback'}) {
6566 # Connecting directly
6568 &open_socket($host, $port, $rv->{'fh'}, \$error);
6569 return $error if ($error);
6570 my $fh = $rv->{'fh'};
6571 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6578 =head2 read_http_connection(&handle, [bytes])
6580 Reads either one line or up to the specified number of bytes from the handle,
6581 originally supplied by make_http_connection.
6584 sub read_http_connection
6588 if ($h->{'ssl_con'}) {
6591 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6592 # need to read more..
6593 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6595 $rv = $h->{'buffer'};
6596 delete($h->{'buffer'});
6599 $h->{'buffer'} .= $more;
6601 $rv = substr($h->{'buffer'}, 0, $idx+1);
6602 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6605 if (length($h->{'buffer'})) {
6606 $rv = $h->{'buffer'};
6607 delete($h->{'buffer'});
6610 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6616 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6619 my $fh = $h->{'fh'};
6623 $rv = undef if ($rv eq "");
6627 =head2 write_http_connection(&handle, [data+])
6629 Writes the given data to the given HTTP connection handle.
6632 sub write_http_connection
6635 my $fh = $h->{'fh'};
6637 if ($h->{'ssl_ctx'}) {
6638 foreach my $s (@_) {
6639 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6640 $allok = 0 if (!$ok);
6644 my $ok = (print $fh @_);
6645 $allok = 0 if (!$ok);
6650 =head2 close_http_connection(&handle)
6652 Closes a connection to an HTTP server, identified by the given handle.
6655 sub close_http_connection
6661 =head2 clean_environment
6663 Deletes any environment variables inherited from miniserv so that they
6664 won't be passed to programs started by webmin. This is useful when calling
6665 programs that check for CGI-related environment variables and modify their
6666 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6669 sub clean_environment
6671 %UNCLEAN_ENV = %ENV;
6672 foreach my $k (keys %ENV) {
6673 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6677 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6678 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6679 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6680 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6681 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6682 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6683 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6684 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6690 =head2 reset_environment
6692 Puts the environment back how it was before clean_environment was callled.
6695 sub reset_environment
6698 foreach my $k (keys %UNCLEAN_ENV) {
6699 $ENV{$k} = $UNCLEAN_ENV{$k};
6701 undef(%UNCLEAN_ENV);
6705 =head2 progress_callback
6707 Never called directly, but useful for passing to &http_download to print
6708 out progress of an HTTP request.
6711 sub progress_callback
6713 if (defined(&theme_progress_callback)) {
6714 # Call the theme override
6715 return &theme_progress_callback(@_);
6719 print $progress_callback_prefix;
6721 $progress_size = $_[1];
6722 $progress_step = int($_[1] / 10);
6723 print &text('progress_size2', $progress_callback_url,
6724 &nice_size($progress_size)),"<br>\n";
6727 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6729 $last_progress_time = $last_progress_size = undef;
6731 elsif ($_[0] == 3) {
6733 my $sp = $progress_callback_prefix.(" " x 5);
6734 if ($progress_size) {
6735 # And we have a size to compare against
6736 my $st = int(($_[1] * 10) / $progress_size);
6737 my $time_now = time();
6738 if ($st != $progress_step ||
6739 $time_now - $last_progress_time > 60) {
6740 # Show progress every 10% or 60 seconds
6741 print $sp,&text('progress_datan', &nice_size($_[1]),
6742 int($_[1]*100/$progress_size)),"<br>\n";
6743 $last_progress_time = $time_now;
6745 $progress_step = $st;
6748 # No total size .. so only show in 100k jumps
6749 if ($_[1] > $last_progress_size+100*1024) {
6750 print $sp,&text('progress_data2n',
6751 &nice_size($_[1])),"<br>\n";
6752 $last_progress_size = $_[1];
6756 elsif ($_[0] == 4) {
6757 # All done downloading
6758 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6760 elsif ($_[0] == 5) {
6761 # Got new location after redirect
6762 $progress_callback_url = $_[1];
6764 elsif ($_[0] == 6) {
6766 $progress_callback_url = $_[1];
6767 print &text('progress_incache', $progress_callback_url),"<br>\n";
6771 =head2 switch_to_remote_user
6773 Changes the user and group of the current process to that of the unix user
6774 with the same name as the current webmin login, or fails if there is none.
6775 This should be called by Usermin module scripts that only need to run with
6776 limited permissions.
6779 sub switch_to_remote_user
6781 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6783 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6784 &create_missing_homedir(\@remote_user_info);
6786 &switch_to_unix_user(\@remote_user_info);
6787 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6788 $ENV{'HOME'} = $remote_user_info[7];
6790 # Export global variables to caller
6791 if ($main::export_to_caller) {
6792 my ($callpkg) = caller();
6793 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6797 =head2 switch_to_unix_user(&user-details)
6799 Switches the current process to the UID and group ID from the given list
6800 of user details, which must be in the format returned by getpwnam.
6803 sub switch_to_unix_user
6806 if (!defined($uinfo->[0])) {
6807 # No username given, so just use given GID
6808 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6811 # Use all groups from user
6812 ($(, $)) = ( $uinfo->[3],
6813 "$uinfo->[3] ".join(" ", $uinfo->[3],
6814 &other_groups($uinfo->[0])) );
6817 POSIX::setuid($uinfo->[2]);
6819 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6820 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6824 =head2 eval_as_unix_user(username, &code)
6826 Runs some code fragment with the effective UID and GID switch to that
6827 of the given Unix user, so that file IO takes place with his permissions.
6831 sub eval_as_unix_user
6833 my ($user, $code) = @_;
6834 my @uinfo = getpwnam($user);
6835 if (!scalar(@uinfo)) {
6836 &error("eval_as_unix_user called with invalid user $user");
6838 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6842 local $main::error_must_die = 1;
6849 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6852 return wantarray ? @rv : $rv[0];
6855 =head2 create_user_config_dirs
6857 Creates per-user config directories and sets $user_config_directory and
6858 $user_module_config_directory to them. Also reads per-user module configs
6859 into %userconfig. This should be called by Usermin module scripts that need
6860 to store per-user preferences or other settings.
6863 sub create_user_config_dirs
6865 return if (!$gconfig{'userconfig'});
6866 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6867 return if (!@uinfo || !$uinfo[7]);
6868 &create_missing_homedir(\@uinfo);
6869 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6870 if (!-d $user_config_directory) {
6871 mkdir($user_config_directory, 0700) ||
6872 &error("Failed to create $user_config_directory : $!");
6873 if ($< == 0 && $uinfo[2]) {
6874 chown($uinfo[2], $uinfo[3], $user_config_directory);
6877 if (&get_module_name()) {
6878 $user_module_config_directory = $user_config_directory."/".
6880 if (!-d $user_module_config_directory) {
6881 mkdir($user_module_config_directory, 0700) ||
6882 &error("Failed to create $user_module_config_directory : $!");
6883 if ($< == 0 && $uinfo[2]) {
6884 chown($uinfo[2], $uinfo[3], $user_config_directory);
6888 &read_file_cached("$module_root_directory/defaultuconfig",
6890 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6891 &read_file_cached("$user_module_config_directory/config",
6895 # Export global variables to caller
6896 if ($main::export_to_caller) {
6897 my ($callpkg) = caller();
6898 foreach my $v ('$user_config_directory',
6899 '$user_module_config_directory', '%userconfig') {
6900 my ($vt, $vn) = split('', $v, 2);
6901 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6906 =head2 create_missing_homedir(&uinfo)
6908 If auto homedir creation is enabled, create one for this user if needed.
6909 For internal use only.
6912 sub create_missing_homedir
6915 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6916 # Use has no home dir .. make one
6917 system("mkdir -p ".quotemeta($uinfo->[7]));
6918 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6919 if ($gconfig{'create_homedir_perms'} ne '') {
6920 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6925 =head2 filter_javascript(text)
6927 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6928 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6931 sub filter_javascript
6934 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6935 $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;
6936 $rv =~ s/(javascript:)/x$1/gi;
6937 $rv =~ s/(vbscript:)/x$1/gi;
6941 =head2 resolve_links(path)
6943 Given a path that may contain symbolic links, returns the real path.
6949 $path =~ s/\/+/\//g;
6950 $path =~ s/\/$// if ($path ne "/");
6951 my @p = split(/\/+/, $path);
6953 for(my $i=0; $i<@p; $i++) {
6954 my $sofar = "/".join("/", @p[0..$i]);
6955 my $lnk = readlink($sofar);
6956 if ($lnk eq $sofar) {
6957 # Link to itself! Cannot do anything more really ..
6960 elsif ($lnk =~ /^\//) {
6961 # Link is absolute..
6962 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6966 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6972 =head2 simplify_path(path, bogus)
6974 Given a path, maybe containing elements ".." and "." , convert it to a
6975 clean, absolute form. Returns undef if this is not possible.
6983 my @bits = split(/\/+/, $dir);
6986 foreach my $b (@bits) {
6990 elsif ($b eq "..") {
6992 if (scalar(@fixedbits) == 0) {
6993 # Cannot! Already at root!
7000 push(@fixedbits, $b);
7003 return "/".join('/', @fixedbits);
7006 =head2 same_file(file1, file2)
7008 Returns 1 if two files are actually the same
7013 return 1 if ($_[0] eq $_[1]);
7014 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7015 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7016 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7017 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7018 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7019 return 0 if (!@stat1 || !@stat2);
7020 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7023 =head2 flush_webmin_caches
7025 Clears all in-memory and on-disk caches used by Webmin.
7028 sub flush_webmin_caches
7030 undef(%main::read_file_cache);
7031 undef(%main::acl_hash_cache);
7032 undef(%main::acl_array_cache);
7033 undef(%main::has_command_cache);
7034 undef(@main::list_languages_cache);
7035 undef($main::got_list_usermods_cache);
7036 undef(@main::list_usermods_cache);
7037 undef(%main::foreign_installed_cache);
7038 unlink("$config_directory/module.infos.cache");
7039 &get_all_module_infos();
7042 =head2 list_usermods
7044 Returns a list of additional module restrictions. For internal use in
7050 if (!$main::got_list_usermods_cache) {
7051 @main::list_usermods_cache = ( );
7053 open(USERMODS, "$config_directory/usermin.mods");
7055 if (/^([^:]+):(\+|-|):(.*)/) {
7056 push(@main::list_usermods_cache,
7057 [ $1, $2, [ split(/\s+/, $3) ] ]);
7061 $main::got_list_usermods_cache = 1;
7063 return @main::list_usermods_cache;
7066 =head2 available_usermods(&allmods, &usermods)
7068 Returns a list of modules that are available to the given user, based
7069 on usermod additional/subtractions. For internal use by Usermin only.
7072 sub available_usermods
7074 return @{$_[0]} if (!@{$_[1]});
7076 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7077 my @uinfo = @remote_user_info;
7078 @uinfo = getpwnam($remote_user) if (!@uinfo);
7079 foreach my $u (@{$_[1]}) {
7081 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7084 elsif ($u->[0] =~ /^\@(.*)$/) {
7085 # Check for group membership
7086 my @ginfo = getgrnam($1);
7087 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7088 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7090 elsif ($u->[0] =~ /^\//) {
7091 # Check users and groups in file
7093 open(USERFILE, $u->[0]);
7096 if ($_ eq $remote_user) {
7099 elsif (/^\@(.*)$/) {
7100 my @ginfo = getgrnam($1);
7102 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7103 &indexof($remote_user,
7104 split(/\s+/, $ginfo[3])) >= 0));
7111 if ($u->[1] eq "+") {
7112 map { $mods{$_}++ } @{$u->[2]};
7114 elsif ($u->[1] eq "-") {
7115 map { delete($mods{$_}) } @{$u->[2]};
7119 map { $mods{$_}++ } @{$u->[2]};
7123 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7126 =head2 get_available_module_infos(nocache)
7128 Returns a list of modules available to the current user, based on
7129 operating system support, access control and usermod restrictions. Useful
7130 in themes that need to display a list of modules the user can use.
7131 Each element of the returned array is a hash reference in the same format as
7132 returned by get_module_info.
7135 sub get_available_module_infos
7138 &read_acl(\%acl, \%uacl);
7139 my $risk = $gconfig{'risk_'.$base_remote_user};
7141 foreach my $minfo (&get_all_module_infos($_[0])) {
7142 next if (!&check_os_support($minfo));
7144 # Check module risk level
7145 next if ($risk ne 'high' && $minfo->{'risk'} &&
7146 $minfo->{'risk'} !~ /$risk/);
7150 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7151 !$acl{$base_remote_user,"*"});
7153 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7157 # Check usermod restrictions
7158 my @usermods = &list_usermods();
7159 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7160 &available_usermods(\@rv, \@usermods);
7162 # Check RBAC restrictions
7164 foreach my $m (@rv) {
7165 if (&supports_rbac($m->{'dir'}) &&
7166 &use_rbac_module_acl(undef, $m->{'dir'})) {
7167 local $rbacs = &get_rbac_module_acl($remote_user,
7175 # Module or system doesn't support RBAC
7176 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7182 if (defined(&theme_foreign_available)) {
7183 foreach my $m (@rbacrv) {
7184 if (&theme_foreign_available($m->{'dir'})) {
7193 # Check licence module vetos
7195 if ($main::licence_module) {
7196 foreach my $m (@themerv) {
7197 if (&foreign_call($main::licence_module,
7198 "check_module_licence", $m->{'dir'})) {
7210 =head2 get_visible_module_infos(nocache)
7212 Like get_available_module_infos, but excludes hidden modules from the list.
7213 Each element of the returned array is a hash reference in the same format as
7214 returned by get_module_info.
7217 sub get_visible_module_infos
7220 my $pn = &get_product_name();
7221 return grep { !$_->{'hidden'} &&
7222 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7225 =head2 get_visible_modules_categories(nocache)
7227 Returns a list of Webmin module categories, each of which is a hash ref
7228 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7229 of modules in the category, in the format returned by get_module_info.
7230 Un-used modules are automatically assigned to the 'unused' category, and
7231 those with no category are put into 'others'.
7234 sub get_visible_modules_categories
7237 my @mods = &get_visible_module_infos($nocache);
7239 if (&get_product_name() eq 'webmin') {
7240 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7241 @mods = grep { $_->{'installed'} ne '0' } @mods;
7243 my %cats = &list_categories(\@mods);
7245 foreach my $c (keys %cats) {
7246 my $cat = { 'code' => $c || 'other',
7247 'desc' => $cats{$c} };
7248 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7251 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7252 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7254 # Add un-installed modules in magic category
7255 my $cat = { 'code' => 'unused',
7256 'desc' => $text{'main_unused'},
7258 'modules' => \@unmods };
7264 =head2 is_under_directory(directory, file)
7266 Returns 1 if the given file is under the specified directory, 0 if not.
7267 Symlinks are taken into account in the file to find it's 'real' location.
7270 sub is_under_directory
7272 my ($dir, $file) = @_;
7273 return 1 if ($dir eq "/");
7274 return 0 if ($file =~ /\.\./);
7275 my $ld = &resolve_links($dir);
7277 return &is_under_directory($ld, $file);
7279 my $lp = &resolve_links($file);
7281 return &is_under_directory($dir, $lp);
7283 return 0 if (length($file) < length($dir));
7284 return 1 if ($dir eq $file);
7286 return substr($file, 0, length($dir)) eq $dir;
7289 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7291 Given an absolute URL, returns the host, port, page and ssl flag components.
7292 Relative URLs can also be parsed, if the base information is provided.
7297 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7299 my $ssl = $1 eq 'https';
7300 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
7306 elsif ($_[0] =~ /^\/\S*$/) {
7307 # A relative to the server URL
7308 return ($_[1], $_[2], $_[0], $_[4]);
7311 # A relative to the directory URL
7313 $page =~ s/[^\/]+$//;
7314 return ($_[1], $_[2], $page.$_[0], $_[4]);
7318 =head2 check_clicks_function
7320 Returns HTML for a JavaScript function called check_clicks that returns
7321 true when first called, but false subsequently. Useful on onClick for
7322 critical buttons. Deprecated, as this method of preventing duplicate actions
7326 sub check_clicks_function
7331 function check_clicks(form)
7338 for(i=0; i<form.length; i++)
7339 form.elements[i].disabled = true;
7348 =head2 load_entities_map
7350 Returns a hash ref containing mappings between HTML entities (like ouml) and
7351 ascii values (like 246). Mainly for internal use.
7354 sub load_entities_map
7356 if (!%entities_map_cache) {
7358 open(EMAP, "$root_directory/entities_map.txt");
7360 if (/^(\d+)\s+(\S+)/) {
7361 $entities_map_cache{$2} = $1;
7366 return \%entities_map_cache;
7369 =head2 entities_to_ascii(string)
7371 Given a string containing HTML entities like ö and 7, replace them
7372 with their ASCII equivalents.
7375 sub entities_to_ascii
7378 my $emap = &load_entities_map();
7379 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7380 $str =~ s/&#(\d+);/chr($1)/ge;
7384 =head2 get_product_name
7386 Returns either 'webmin' or 'usermin', depending on which program the current
7387 module is in. Useful for modules that can be installed into either.
7390 sub get_product_name
7392 return $gconfig{'product'} if (defined($gconfig{'product'}));
7393 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7398 Returns the character set for the current language, such as iso-8859-1.
7403 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7404 $current_lang_info->{'charset'} ?
7405 $current_lang_info->{'charset'} : $default_charset;
7409 =head2 get_display_hostname
7411 Returns the system's hostname for UI display purposes. This may be different
7412 from the actual hostname if you administrator has configured it so in the
7413 Webmin Configuration module.
7416 sub get_display_hostname
7418 if ($gconfig{'hostnamemode'} == 0) {
7419 return &get_system_hostname();
7421 elsif ($gconfig{'hostnamemode'} == 3) {
7422 return $gconfig{'hostnamedisplay'};
7425 my $h = $ENV{'HTTP_HOST'};
7427 if ($gconfig{'hostnamemode'} == 2) {
7428 $h =~ s/^(www|ftp|mail)\.//i;
7434 =head2 save_module_config([&config], [modulename])
7436 Saves the configuration for some module. The config parameter is an optional
7437 hash reference of names and values to save, which defaults to the global
7438 %config hash. The modulename parameter is the module to update the config
7439 file, which defaults to the current module.
7442 sub save_module_config
7444 my $c = $_[0] || { &get_module_variable('%config') };
7445 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7446 &write_file("$config_directory/$m/config", $c);
7449 =head2 save_user_module_config([&config], [modulename])
7451 Saves the user's Usermin preferences for some module. The config parameter is
7452 an optional hash reference of names and values to save, which defaults to the
7453 global %userconfig hash. The modulename parameter is the module to update the
7454 config file, which defaults to the current module.
7457 sub save_user_module_config
7459 my $c = $_[0] || { &get_module_variable('%userconfig') };
7460 my $m = $_[1] || &get_module_name();
7461 my $ucd = $user_config_directory;
7463 my @uinfo = @remote_user_info ? @remote_user_info
7464 : getpwnam($remote_user);
7465 return if (!@uinfo || !$uinfo[7]);
7466 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7468 &write_file("$ucd/$m/config", $c);
7471 =head2 nice_size(bytes, [min])
7473 Converts a number of bytes into a number followed by a suffix like GB, MB
7474 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7475 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7480 my ($units, $uname);
7481 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7482 $units = 1024*1024*1024*1024;
7485 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7486 $units = 1024*1024*1024;
7489 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7493 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7501 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7503 return $sz." ".$uname;
7506 =head2 get_perl_path
7508 Returns the path to Perl currently in use, such as /usr/bin/perl.
7513 if (open(PERL, "$config_directory/perl-path")) {
7519 return $^X if (-x $^X);
7520 return &has_command("perl");
7523 =head2 get_goto_module([&mods])
7525 Returns the details of a module that the current user should be re-directed
7526 to after logging in, or undef if none. Useful for themes.
7531 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7532 if ($gconfig{'gotomodule'}) {
7533 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7534 return $goto if ($goto);
7536 if (@mods == 1 && $gconfig{'gotoone'}) {
7542 =head2 select_all_link(field, form, [text])
7544 Returns HTML for a 'Select all' link that uses Javascript to select
7545 multiple checkboxes with the same name. The parameters are :
7547 =item field - Name of the checkbox inputs.
7549 =item form - Index of the form on the page.
7551 =item text - Message for the link, defaulting to 'Select all'.
7556 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7557 my ($field, $form, $text) = @_;
7559 $text ||= $text{'ui_selall'};
7560 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7563 =head2 select_invert_link(field, form, text)
7565 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7566 selection on multiple checkboxes with the same name. The parameters are :
7568 =item field - Name of the checkbox inputs.
7570 =item form - Index of the form on the page.
7572 =item text - Message for the link, defaulting to 'Invert selection'.
7575 sub select_invert_link
7577 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7578 my ($field, $form, $text) = @_;
7580 $text ||= $text{'ui_selinv'};
7581 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7584 =head2 select_rows_link(field, form, text, &rows)
7586 Returns HTML for a link that uses Javascript to select rows with particular
7587 values for their checkboxes. The parameters are :
7589 =item field - Name of the checkbox inputs.
7591 =item form - Index of the form on the page.
7593 =item text - Message for the link, de
7595 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7598 sub select_rows_link
7600 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7601 my ($field, $form, $text, $rows) = @_;
7603 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7604 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7605 $js .= "return false;";
7606 return "<a href='#' onClick='$js'>$text</a>";
7609 =head2 check_pid_file(file)
7611 Given a pid file, returns the PID it contains if the process is running.
7616 open(PIDFILE, $_[0]) || return undef;
7617 my $pid = <PIDFILE>;
7619 $pid =~ /^\s*(\d+)/ || return undef;
7620 kill(0, $1) || return undef;
7626 Return the local os-specific library name to this module. For internal use only.
7631 my $mn = &get_module_name();
7632 my $md = &module_root_directory($mn);
7633 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7634 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7636 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7637 return "$mn-$gconfig{'os_type'}-lib.pl";
7639 elsif (-r "$md/$mn-generic-lib.pl") {
7640 return "$mn-generic-lib.pl";
7647 =head2 module_root_directory(module)
7649 Given a module name, returns its root directory. On a typical Webmin install,
7650 all modules are under the same directory - but it is theoretically possible to
7654 sub module_root_directory
7656 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7657 if (@root_directories > 1) {
7658 foreach my $r (@root_directories) {
7664 return "$root_directories[0]/$d";
7667 =head2 list_mime_types
7669 Returns a list of all known MIME types and their extensions, as a list of hash
7670 references with keys :
7672 =item type - The MIME type, like text/plain.
7674 =item exts - A list of extensions, like .doc and .avi.
7676 =item desc - A human-readable description for the MIME type.
7681 if (!@list_mime_types_cache) {
7683 open(MIME, "$root_directory/mime.types");
7687 if (s/#\s*(.*)$//g) {
7690 my ($type, @exts) = split(/\s+/);
7692 push(@list_mime_types_cache, { 'type' => $type,
7699 return @list_mime_types_cache;
7702 =head2 guess_mime_type(filename, [default])
7704 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7705 The optional default parameter sets a default type of use if none is found,
7706 which defaults to application/octet-stream.
7711 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7713 foreach my $t (&list_mime_types()) {
7714 foreach my $e (@{$t->{'exts'}}) {
7715 return $t->{'type'} if (lc($e) eq lc($ext));
7719 return @_ > 1 ? $_[1] : "application/octet-stream";
7722 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7724 Opens a file handle for writing to a temporary file, which will only be
7725 renamed over the real file when the handle is closed. This allows critical
7726 files like /etc/shadow to be updated safely, even if writing fails part way
7727 through due to lack of disk space. The parameters are :
7729 =item handle - File handle to open, as you would use in Perl's open function.
7731 =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.
7733 =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 $! with the error code.
7735 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7737 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7743 # Just getting a temp file
7744 if (!defined($main::open_tempfiles{$_[0]})) {
7745 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7746 my $dir = $1 || "/";
7747 my $tmp = "$dir/$2.webmintmp.$$";
7748 $main::open_tempfiles{$_[0]} = $tmp;
7749 push(@main::temporary_files, $tmp);
7751 return $main::open_tempfiles{$_[0]};
7755 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7756 $fh = &callers_package($fh);
7758 my %gaccess = &get_module_acl(undef, "");
7759 my $db = $gconfig{'debug_what_write'};
7760 if ($file =~ /\r|\n|\0/) {
7761 if ($noerror) { return 0; }
7762 else { &error("Filename contains invalid characters"); }
7764 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7765 # Read-only mode .. veto all writes
7766 print STDERR "vetoing write to $file\n";
7767 return open($fh, ">$null_file");
7769 elsif ($file =~ /^(>|>>|)nul$/i) {
7770 # Write to Windows null device
7771 &webmin_debug_log($1 eq ">" ? "WRITE" :
7772 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7774 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7775 # Writes to /dev/null or TTYs don't need to be handled
7776 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7777 return open($fh, $file);
7779 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7780 &webmin_debug_log("WRITE", $1) if ($db);
7781 # Over-writing a file, via a temp file
7783 $file = &translate_filename($file);
7785 # Open the link target instead
7786 $file = &resolve_links($file);
7789 # Cannot open a directory!
7790 if ($noerror) { return 0; }
7791 else { &error("Cannot write to directory $file"); }
7793 my $tmp = &open_tempfile($file);
7794 my $ex = open($fh, ">$tmp");
7795 if (!$ex && $! =~ /permission/i) {
7796 # Could not open temp file .. try opening actual file
7798 $ex = open($fh, ">$file");
7799 delete($main::open_tempfiles{$file});
7802 $main::open_temphandles{$fh} = $file;
7805 if (!$ex && !$noerror) {
7806 &error(&text("efileopen", $file, $!));
7810 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7811 # Just writing direct to a file
7812 &webmin_debug_log("WRITE", $1) if ($db);
7814 $file = &translate_filename($file);
7815 my @old_attributes = &get_clear_file_attributes($file);
7816 my $ex = open($fh, ">$file");
7817 &reset_file_attributes($file, \@old_attributes);
7818 $main::open_temphandles{$fh} = $file;
7819 if (!$ex && !$noerror) {
7820 &error(&text("efileopen", $file, $!));
7825 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7826 # Appending to a file .. nothing special to do
7827 &webmin_debug_log("APPEND", $1) if ($db);
7829 $file = &translate_filename($file);
7830 my @old_attributes = &get_clear_file_attributes($file);
7831 my $ex = open($fh, ">>$file");
7832 &reset_file_attributes($file, \@old_attributes);
7833 $main::open_temphandles{$fh} = $file;
7834 if (!$ex && !$noerror) {
7835 &error(&text("efileopen", $file, $!));
7840 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7841 # Read mode .. nothing to do here
7842 &webmin_debug_log("READ", $file) if ($db);
7843 $file = &translate_filename($file);
7844 return open($fh, $file);
7846 elsif ($file eq ">" || $file eq ">>") {
7847 my ($package, $filename, $line) = caller;
7848 if ($noerror) { return 0; }
7849 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7852 my ($package, $filename, $line) = caller;
7853 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7858 =head2 close_tempfile(file|handle)
7860 Copies a temp file to the actual file, assuming that all writes were
7861 successful. The handle must have been one passed to open_tempfile.
7867 my $fh = &callers_package($_[0]);
7869 if (defined($file = $main::open_temphandles{$fh})) {
7871 close($fh) || &error(&text("efileclose", $file, $!));
7872 delete($main::open_temphandles{$fh});
7873 return &close_tempfile($file);
7875 elsif (defined($main::open_tempfiles{$_[0]})) {
7877 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7878 my @st = stat($_[0]);
7879 if (&is_selinux_enabled() && &has_command("chcon")) {
7880 # Set original security context
7881 system("chcon --reference=".quotemeta($_[0]).
7882 " ".quotemeta($main::open_tempfiles{$_[0]}).
7883 " >/dev/null 2>&1");
7885 my @old_attributes = &get_clear_file_attributes($_[0]);
7886 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7888 # Set original permissions and ownership
7889 chmod($st[2], $_[0]);
7890 chown($st[4], $st[5], $_[0]);
7892 &reset_file_attributes($_[0], \@old_attributes);
7893 delete($main::open_tempfiles{$_[0]});
7894 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7895 if ($main::open_templocks{$_[0]}) {
7896 &unlock_file($_[0]);
7897 delete($main::open_templocks{$_[0]});
7902 # Must be closing a handle not associated with a file
7908 =head2 print_tempfile(handle, text, ...)
7910 Like the normal print function, but calls &error on failure. Useful when
7911 combined with open_tempfile, to ensure that a criticial file is never
7912 only partially written.
7917 my ($fh, @args) = @_;
7918 $fh = &callers_package($fh);
7919 (print $fh @args) || &error(&text("efilewrite",
7920 $main::open_temphandles{$fh} || $fh, $!));
7923 =head2 is_selinux_enabled
7925 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7928 sub is_selinux_enabled
7930 if (!defined($main::selinux_enabled_cache)) {
7932 if ($gconfig{'os_type'} !~ /-linux$/) {
7933 # Not on linux, so no way
7934 $main::selinux_enabled_cache = 0;
7936 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7937 # Use global config file
7938 $main::selinux_enabled_cache =
7939 $seconfig{'SELINUX'} eq 'disabled' ||
7940 !$seconfig{'SELINUX'} ? 0 : 1;
7943 # Use selinuxenabled command
7944 #$selinux_enabled_cache =
7945 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7946 $main::selinux_enabled_cache = 0;
7949 return $main::selinux_enabled_cache;
7952 =head2 get_clear_file_attributes(file)
7954 Finds file attributes that may prevent writing, clears them and returns them
7955 as a list. May call error. Mainly for internal use by open_tempfile and
7959 sub get_clear_file_attributes
7963 if ($gconfig{'chattr'}) {
7964 # Get original immutable bit
7965 my $out = &backquote_command(
7966 "lsattr ".quotemeta($file)." 2>/dev/null");
7968 $out =~ s/\s\S+\n//;
7969 @old_attributes = grep { $_ ne '-' } split(//, $out);
7971 if (&indexof("i", @old_attributes) >= 0) {
7972 my $err = &backquote_logged(
7973 "chattr -i ".quotemeta($file)." 2>&1");
7975 &error("Failed to remove immutable bit on ".
7980 return @old_attributes;
7983 =head2 reset_file_attributes(file, &attributes)
7985 Put back cleared attributes on some file. May call error. Mainly for internal
7986 use by close_tempfile.
7989 sub reset_file_attributes
7991 my ($file, $old_attributes) = @_;
7992 if (&indexof("i", @$old_attributes) >= 0) {
7993 my $err = &backquote_logged(
7994 "chattr +i ".quotemeta($file)." 2>&1");
7996 &error("Failed to restore immutable bit on ".
8002 =head2 cleanup_tempnames
8004 Remove all temporary files generated using transname. Typically only called
8005 internally when a Webmin script exits.
8008 sub cleanup_tempnames
8010 foreach my $t (@main::temporary_files) {
8013 @main::temporary_files = ( );
8016 =head2 open_lock_tempfile([handle], file, [no-error])
8018 Returns a temporary file for writing to some actual file, and also locks it.
8019 Effectively the same as calling lock_file and open_tempfile on the same file,
8020 but calls the unlock for you automatically when it is closed.
8023 sub open_lock_tempfile
8025 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8026 $fh = &callers_package($fh);
8027 my $lockfile = $file;
8028 $lockfile =~ s/^[^\/]*//;
8029 if ($lockfile =~ /^\//) {
8030 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8032 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8037 $main::end_exit_status ||= $?;
8038 if ($$ == $main::initial_process_id) {
8039 # Exiting from initial process
8040 &cleanup_tempnames();
8041 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8042 $main::debug_log_start_module eq &get_module_name()) {
8043 my $len = time() - $main::debug_log_start_time;
8044 &webmin_debug_log("STOP", "runtime=$len");
8045 $main::debug_log_start_time = 0;
8047 if (!$ENV{'SCRIPT_NAME'} &&
8048 $main::initial_module_name eq &get_module_name()) {
8049 # In a command-line script - call the real exit, so that the
8050 # exit status gets properly propogated. In some cases this
8051 # was not happening.
8052 exit($main::end_exit_status);
8057 =head2 month_to_number(month)
8059 Converts a month name like feb to a number like 1.
8064 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8067 =head2 number_to_month(number)
8069 Converts a number like 1 to a month name like Feb.
8074 return ucfirst($number_to_month_map{$_[0]});
8077 =head2 get_rbac_module_acl(user, module)
8079 Returns a hash reference of RBAC overrides ACLs for some user and module.
8080 May return undef if none exist (indicating access denied), or the string *
8081 if full access is granted.
8084 sub get_rbac_module_acl
8086 my ($user, $mod) = @_;
8087 eval "use Authen::SolarisRBAC";
8088 return undef if ($@);
8091 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8092 # Automagic webmin.modulename.admin authorization exists .. allow access
8094 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8095 %rv = ( 'noconfig' => 1 );
8102 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8106 my ($auths, $acls) = split(/\s+/, $_);
8107 my @auths = split(/,/, $auths);
8109 my ($merge) = ($acls =~ s/^\+//);
8111 if ($auths eq "*") {
8112 # These ACLs apply to all RBAC users.
8113 # Only if there is some that match a specific authorization
8114 # later will they be used though.
8117 # Check each of the RBAC authorizations
8118 foreach my $a (@auths) {
8119 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8124 $foundany++ if ($gotall);
8127 # Found an RBAC authorization - return the ACLs
8128 return "*" if ($acls eq "*");
8129 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8131 # Just add to current set
8132 foreach my $a (keys %acl) {
8143 return !$foundany ? undef : %rv ? \%rv : undef;
8146 =head2 supports_rbac([module])
8148 Returns 1 if RBAC client support is available, such as on Solaris.
8153 return 0 if ($gconfig{'os_type'} ne 'solaris');
8154 eval "use Authen::SolarisRBAC";
8157 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8162 =head2 use_rbac_module_acl(user, module)
8164 Returns 1 if some user should use RBAC to get permissions for a module
8167 sub use_rbac_module_acl
8169 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8170 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8171 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8172 my %access = &get_module_acl($u, $m, 1);
8173 return $access{'rbac'} ? 1 : 0;
8176 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8178 Runs some command, possibly feeding it input and capturing output to the
8179 give files or scalar references. The parameters are :
8181 =item command - Full command to run, possibly including shell meta-characters.
8183 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8185 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8187 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8189 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8191 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8196 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8197 if (&is_readonly_mode() && !$safe) {
8198 print STDERR "Vetoing command $_[0]\n";
8202 $cmd = &translate_command($cmd);
8204 # Use ` operator where possible
8205 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8206 if (!$stdin && ref($stdout) && !$stderr) {
8207 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8208 $$stdout = `$cmd 2>$null_file`;
8211 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8212 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8213 $$stdout = `$cmd 2>&1`;
8216 elsif (!$stdin && !$stdout && !$stderr) {
8217 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8218 return system("$cmd >$null_file 2>$null_file <$null_file");
8222 $| = 1; # needed on some systems to flush before forking
8223 pipe(EXECSTDINr, EXECSTDINw);
8224 pipe(EXECSTDOUTr, EXECSTDOUTw);
8225 pipe(EXECSTDERRr, EXECSTDERRw);
8227 if (!($pid = fork())) {
8231 open(STDIN, "<&EXECSTDINr");
8232 open(STDOUT, ">&EXECSTDOUTw");
8233 if (ref($stderr) && $stderr eq $stdout) {
8234 open(STDERR, ">&EXECSTDOUTw");
8237 open(STDERR, ">&EXECSTDERRw");
8244 my $fullcmd = "($cmd)";
8245 if ($stdin && !ref($stdin)) {
8246 $fullcmd .= " <$stdin";
8248 if ($stdout && !ref($stdout)) {
8249 $fullcmd .= " >$stdout";
8251 if ($stderr && !ref($stderr)) {
8252 if ($stderr eq $stdout) {
8253 $fullcmd .= " 2>&1";
8256 $fullcmd .= " 2>$stderr";
8259 if ($gconfig{'os_type'} eq 'windows') {
8263 exec("/bin/sh", "-c", $fullcmd);
8265 print "Exec failed : $!\n";
8272 # Feed input and capture output
8274 if ($stdin && ref($stdin)) {
8275 print EXECSTDINw $$stdin;
8278 if ($stdout && ref($stdout)) {
8280 while(<EXECSTDOUTr>) {
8285 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8287 while(<EXECSTDERRr>) {
8298 =head2 open_readfile(handle, file)
8300 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8301 exactly the same as Perl's open function.
8306 my ($fh, $file) = @_;
8307 $fh = &callers_package($fh);
8308 my $realfile = &translate_filename($file);
8309 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8310 return open($fh, "<".$realfile);
8313 =head2 open_execute_command(handle, command, output?, safe?)
8315 Runs some command, with the specified file handle set to either write to it if
8316 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8317 indicates if the command modifies the state of the system or not.
8320 sub open_execute_command
8322 my ($fh, $cmd, $mode, $safe) = @_;
8323 $fh = &callers_package($fh);
8324 my $realcmd = &translate_command($cmd);
8325 if (&is_readonly_mode() && !$safe) {
8326 # Don't actually run it
8327 print STDERR "vetoing command $cmd\n";
8330 return open($fh, ">$null_file");
8333 return open($fh, $null_file);
8337 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8338 if ($gconfig{'debug_what_cmd'});
8340 return open($fh, "| $cmd");
8342 elsif ($mode == 1) {
8343 return open($fh, "$cmd 2>$null_file |");
8345 elsif ($mode == 2) {
8346 return open($fh, "$cmd 2>&1 |");
8350 =head2 translate_filename(filename)
8352 Applies all relevant registered translation functions to a filename. Mostly
8353 for internal use, and typically does nothing.
8356 sub translate_filename
8358 my ($realfile) = @_;
8359 my @funcs = grep { $_->[0] eq &get_module_name() ||
8360 !defined($_->[0]) } @main::filename_callbacks;
8361 foreach my $f (@funcs) {
8363 $realfile = &$func($realfile, @{$f->[2]});
8368 =head2 translate_command(filename)
8370 Applies all relevant registered translation functions to a command. Mostly
8371 for internal use, and typically does nothing.
8374 sub translate_command
8377 my @funcs = grep { $_->[0] eq &get_module_name() ||
8378 !defined($_->[0]) } @main::command_callbacks;
8379 foreach my $f (@funcs) {
8381 $realcmd = &$func($realcmd, @{$f->[2]});
8386 =head2 register_filename_callback(module|undef, &function, &args)
8388 Registers some function to be called when the specified module (or all
8389 modules) tries to open a file for reading and writing. The function must
8390 return the actual file to open. This allows you to override which files
8391 other code actually operates on, via the translate_filename function.
8394 sub register_filename_callback
8396 my ($mod, $func, $args) = @_;
8397 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8400 =head2 register_command_callback(module|undef, &function, &args)
8402 Registers some function to be called when the specified module (or all
8403 modules) tries to execute a command. The function must return the actual
8404 command to run. This allows you to override which commands other other code
8405 actually runs, via the translate_command function.
8408 sub register_command_callback
8410 my ($mod, $func, $args) = @_;
8411 push(@main::command_callbacks, [ $mod, $func, $args ]);
8414 =head2 capture_function_output(&function, arg, ...)
8416 Captures output that some function prints to STDOUT, and returns it. Useful
8417 for functions outside your control that print data when you really want to
8418 manipulate it before output.
8421 sub capture_function_output
8423 my ($func, @args) = @_;
8424 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8425 my $old = select(SOCKET1);
8426 my @rv = &$func(@args);
8435 return wantarray ? ($out, \@rv) : $out;
8438 =head2 capture_function_output_tempfile(&function, arg, ...)
8440 Behaves the same as capture_function_output, but uses a temporary file
8441 to avoid buffer full problems.
8444 sub capture_function_output_tempfile
8446 my ($func, @args) = @_;
8447 my $temp = &transname();
8448 open(BUFFER, ">$temp");
8449 my $old = select(BUFFER);
8450 my @rv = &$func(@args);
8453 my $out = &read_file_contents($temp);
8454 &unlink_file($temp);
8455 return wantarray ? ($out, \@rv) : $out;
8458 =head2 modules_chooser_button(field, multiple, [form])
8460 Returns HTML for a button for selecting one or many Webmin modules.
8461 field - Name of the HTML field to place the module names into.
8462 multiple - Set to 1 if multiple modules can be selected.
8463 form - Index of the form on the page.
8466 sub modules_chooser_button
8468 return &theme_modules_chooser_button(@_)
8469 if (defined(&theme_modules_chooser_button));
8470 my $form = defined($_[2]) ? $_[2] : 0;
8471 my $w = $_[1] ? 700 : 500;
8473 if ($_[1] && $gconfig{'db_sizemodules'}) {
8474 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8476 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8477 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8479 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";
8482 =head2 substitute_template(text, &hash)
8484 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8485 the text replaces it with the value of the hash key foo. Also supports blocks
8486 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8487 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8490 sub substitute_template
8492 # Add some extra fixed parameters to the hash
8493 my %hash = %{$_[1]};
8494 $hash{'hostname'} = &get_system_hostname();
8495 $hash{'webmin_config'} = $config_directory;
8496 $hash{'webmin_etc'} = $config_directory;
8497 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8498 $hash{'webmin_var'} = $var_directory;
8500 # Add time-based parameters, for use in DNS
8501 $hash{'current_time'} = time();
8502 my @tm = localtime($hash{'current_time'});
8503 $hash{'current_year'} = $tm[5]+1900;
8504 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8505 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8506 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8507 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8508 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8510 # Actually do the substition
8512 foreach my $s (keys %hash) {
8513 next if ($s eq ''); # Prevent just $ from being subbed
8516 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8517 $rv =~ s/\$\Q$us\E/$sv/g;
8519 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8520 # and ${IF}..${ENDIF} with value
8521 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8522 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8524 # Replace $IF..$ELSE..$ENDIF block with first value,
8525 # and $IF..$ENDIF with value
8526 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8527 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8529 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8530 # matching, nothing if not
8531 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8532 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8534 # Replace $IFEQ..$ENDIFEQ block with first value if
8535 # matching, nothing if not
8536 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8537 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8540 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8541 # and ${IF}..${ENDIF} with nothing
8542 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8543 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8545 # Replace $IF..$ELSE..$ENDIF block with second value,
8546 # and $IF..$ENDIF with nothing
8547 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8548 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8550 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8551 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8552 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8556 # Now assume any $IF blocks whose variables are not present in the hash
8557 # evaluate to false.
8558 # $IF...$ELSE x $ENDIF => x
8559 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8560 # $IF...x...$ENDIF => (nothing)
8561 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8562 # ${var} => (nothing)
8563 $rv =~ s/\$\{[A-Z]+\}//g;
8568 =head2 running_in_zone
8570 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8571 disable module and features that are not appropriate, like those that modify
8572 mounted filesystems.
8577 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8578 $gconfig{'os_version'} < 10);
8579 my $zn = `zonename 2>$null_file`;
8581 return $zn && $zn ne "global";
8584 =head2 running_in_vserver
8586 Returns 1 if the current Webmin instance is running in a Linux VServer.
8587 Used to disable modules and features that are not appropriate.
8590 sub running_in_vserver
8592 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8595 open(MTAB, "/etc/mtab");
8597 my ($dev, $mp) = split(/\s+/, $_);
8598 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8607 =head2 running_in_xen
8609 Returns 1 if Webmin is running inside a Xen instance, by looking
8610 at /proc/xen/capabilities.
8615 return 0 if (!-r "/proc/xen/capabilities");
8616 my $cap = &read_file_contents("/proc/xen/capabilities");
8617 return $cap =~ /control_d/ ? 0 : 1;
8620 =head2 running_in_openvz
8622 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8623 at /proc/vz/veinfo for a non-zero line.
8626 sub running_in_openvz
8628 return 0 if (!-r "/proc/vz/veinfo");
8629 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8630 return 0 if (!$lref || !@$lref);
8631 foreach my $l (@$lref) {
8633 my @ll = split(/\s+/, $l);
8634 return 0 if ($ll[0] eq '0');
8639 =head2 list_categories(&modules, [include-empty])
8641 Returns a hash mapping category codes to names, including any custom-defined
8642 categories. The modules parameter must be an array ref of module hash objects,
8643 as returned by get_all_module_infos.
8648 my ($mods, $empty) = @_;
8649 my (%cats, %catnames);
8650 &read_file("$config_directory/webmin.catnames", \%catnames);
8651 foreach my $o (@lang_order_list) {
8652 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8657 foreach my $m (@$mods) {
8658 my $c = $m->{'category'};
8659 next if ($cats{$c});
8660 if (defined($catnames{$c})) {
8661 $cats{$c} = $catnames{$c};
8663 elsif ($text{"category_$c"}) {
8664 $cats{$c} = $text{"category_$c"};
8667 # try to get category name from module ..
8668 my %mtext = &load_language($m->{'dir'});
8669 if ($mtext{"category_$c"}) {
8670 $cats{$c} = $mtext{"category_$c"};
8673 $c = $m->{'category'} = "";
8674 $cats{$c} = $text{"category_$c"};
8681 =head2 is_readonly_mode
8683 Returns 1 if the current user is in read-only mode, and thus all writes
8684 to files and command execution should fail.
8687 sub is_readonly_mode
8689 if (!defined($main::readonly_mode_cache)) {
8690 my %gaccess = &get_module_acl(undef, "");
8691 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8693 return $main::readonly_mode_cache;
8696 =head2 command_as_user(user, with-env?, command, ...)
8698 Returns a command to execute some command as the given user, using the
8699 su statement. If on Linux, the /bin/sh shell is forced in case the user
8700 does not have a valid shell. If with-env is set to 1, the -s flag is added
8701 to the su command to read the user's .profile or .bashrc file.
8706 my ($user, $env, @args) = @_;
8707 my @uinfo = getpwnam($user);
8708 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8709 # User shell doesn't appear to be valid
8710 if ($gconfig{'os_type'} =~ /-linux$/) {
8711 # Use -s /bin/sh to force it
8712 $shellarg = " -s /bin/sh";
8714 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8715 $gconfig{'os_type'} eq 'solaris' &&
8716 $gconfig{'os_version'} >= 11 ||
8717 $gconfig{'os_type'} eq 'macos') {
8718 # Use -m and force /bin/sh
8719 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8723 my $rv = "su".($env ? " -" : "").$shellarg.
8724 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8728 =head2 list_osdn_mirrors(project, file)
8730 This function is now deprecated in favor of letting sourceforge just
8731 redirect to the best mirror, and now just returns their primary download URL.
8734 sub list_osdn_mirrors
8736 my ($project, $file) = @_;
8737 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8739 'mirror' => 'downloads' } );
8742 =head2 convert_osdn_url(url)
8744 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8745 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8746 to a real URL on the sourceforge download redirector.
8749 sub convert_osdn_url
8752 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8753 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8754 # Always use the Sourceforge mail download URL, which does
8755 # a location-based redirect for us
8756 my ($project, $file) = ($1, $2);
8757 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8759 return wantarray ? ( $url, 0 ) : $url;
8762 # Some other source .. don't change
8763 return wantarray ? ( $url, 2 ) : $url;
8767 =head2 get_current_dir
8769 Returns the directory the current process is running in.
8775 if ($gconfig{'os_type'} eq 'windows') {
8788 =head2 supports_users
8790 Returns 1 if the current OS supports Unix user concepts and functions like
8791 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8797 return $gconfig{'os_type'} ne 'windows';
8800 =head2 supports_symlinks
8802 Returns 1 if the current OS supports symbolic and hard links. This will not
8803 be the case on Windows.
8806 sub supports_symlinks
8808 return $gconfig{'os_type'} ne 'windows';
8811 =head2 quote_path(path)
8813 Returns a path with safe quoting for the current operating system.
8819 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8820 # Windows only supports "" style quoting
8824 return quotemeta($path);
8828 =head2 get_windows_root
8830 Returns the base windows system directory, like c:/windows.
8833 sub get_windows_root
8835 if ($ENV{'SystemRoot'}) {
8836 my $rv = $ENV{'SystemRoot'};
8841 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8845 =head2 read_file_contents(file)
8847 Given a filename, returns its complete contents as a string. Effectively
8848 the same as the Perl construct `cat file`.
8851 sub read_file_contents
8853 &open_readfile(FILE, $_[0]) || return undef;
8860 =head2 unix_crypt(password, salt)
8862 Performs Unix encryption on a password, using the built-in crypt function or
8863 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8864 must be either an already-hashed password, or a two-character alpha-numeric
8870 my ($pass, $salt) = @_;
8871 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8872 my $rv = eval "crypt(\$pass, \$salt)";
8874 return $rv if ($rv && !$@);
8875 eval "use Crypt::UnixCrypt";
8877 return Crypt::UnixCrypt::crypt($pass, $salt);
8880 &error("Failed to encrypt password : $err");
8884 =head2 split_quoted_string(string)
8886 Given a string like I<foo "bar baz" quux>, returns the array :
8890 sub split_quoted_string
8894 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8895 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8896 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8903 =head2 write_to_http_cache(url, file|&data)
8905 Updates the Webmin cache with the contents of the given file, possibly also
8906 clearing out old data. Mainly for internal use by http_download.
8909 sub write_to_http_cache
8911 my ($url, $file) = @_;
8912 return 0 if (!$gconfig{'cache_size'});
8914 # Don't cache downloads that look dynamic
8915 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8919 # Check if the current module should do caching
8920 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8921 # Caching all except some modules
8922 my @mods = split(/\s+/, $1);
8923 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8925 elsif ($gconfig{'cache_mods'}) {
8926 # Only caching some modules
8927 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8928 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8934 $size = length($$file);
8937 my @st = stat($file);
8941 if ($size > $gconfig{'cache_size'}) {
8942 # Bigger than the whole cache - so don't save it
8947 $cfile = "$main::http_cache_directory/$cfile";
8949 # See how much we have cached currently, clearing old files
8951 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8952 opendir(CACHEDIR, $main::http_cache_directory);
8953 foreach my $f (readdir(CACHEDIR)) {
8954 next if ($f eq "." || $f eq "..");
8955 my $path = "$main::http_cache_directory/$f";
8956 my @st = stat($path);
8957 if ($gconfig{'cache_days'} &&
8958 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8959 # This file is too old .. trash it
8964 push(@cached, [ $path, $st[7], $st[9] ]);
8968 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8969 while($total+$size > $gconfig{'cache_size'} && @cached) {
8970 # Cache is too big .. delete some files until the new one will fit
8971 unlink($cached[0]->[0]);
8972 $total -= $cached[0]->[1];
8976 # Finally, write out the new file
8978 &open_tempfile(CACHEFILE, ">$cfile");
8979 &print_tempfile(CACHEFILE, $$file);
8980 &close_tempfile(CACHEFILE);
8983 my ($ok, $err) = ©_source_dest($file, $cfile);
8989 =head2 check_in_http_cache(url)
8991 If some URL is in the cache and valid, return the filename for it. Mainly
8992 for internal use by http_download.
8995 sub check_in_http_cache
8998 return undef if (!$gconfig{'cache_size'});
9000 # Check if the current module should do caching
9001 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9002 # Caching all except some modules
9003 my @mods = split(/\s+/, $1);
9004 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9006 elsif ($gconfig{'cache_mods'}) {
9007 # Only caching some modules
9008 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9009 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9014 $cfile = "$main::http_cache_directory/$cfile";
9015 my @st = stat($cfile);
9016 return undef if (!@st || !$st[7]);
9017 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9022 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9027 =head2 supports_javascript
9029 Returns 1 if the current browser is assumed to support javascript.
9032 sub supports_javascript
9034 if (defined(&theme_supports_javascript)) {
9035 return &theme_supports_javascript();
9037 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9040 =head2 get_module_name
9042 Returns the name of the Webmin module that called this function. For internal
9043 use only by other API functions.
9048 return &get_module_variable('$module_name');
9051 =head2 get_module_variable(name, [ref])
9053 Returns the value of some variable which is set in the caller's context, if
9054 using the new WebminCore package. For internal use only.
9057 sub get_module_variable
9059 my ($v, $wantref) = @_;
9060 my $slash = $wantref ? "\\" : "";
9061 my $thispkg = &web_libs_package();
9062 if ($thispkg eq 'WebminCore') {
9063 my ($vt, $vn) = split('', $v, 2);
9065 for(my $i=0; ($callpkg) = caller($i); $i++) {
9066 last if ($callpkg ne $thispkg);
9068 return eval "${slash}${vt}${callpkg}::${vn}";
9070 return eval "${slash}${v}";
9073 =head2 clear_time_locale()
9075 Temporarily force the locale to C, until reset_time_locale is called. This is
9076 useful if your code is going to call C<strftime> from the POSIX package, and
9077 you want to ensure that the output is in a consistent format.
9080 sub clear_time_locale
9082 if ($main::clear_time_locale_count == 0) {
9085 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9086 POSIX::setlocale(POSIX::LC_TIME, "C");
9089 $main::clear_time_locale_count++;
9092 =head2 reset_time_locale()
9094 Revert the locale to whatever it was before clear_time_locale was called
9097 sub reset_time_locale
9099 if ($main::clear_time_locale_count == 1) {
9101 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9102 $main::clear_time_locale_old = undef;
9105 $main::clear_time_locale_count--;
9108 =head2 callers_package(filehandle)
9110 Convert a non-module filehandle like FOO to one qualified with the
9111 caller's caller's package, like fsdump::FOO. For internal use only.
9117 my $callpkg = (caller(1))[0];
9118 my $thispkg = &web_libs_package();
9119 if (!ref($fh) && $fh !~ /::/ &&
9120 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9121 $fh = $callpkg."::".$fh;
9126 =head2 web_libs_package()
9128 Returns the package this code is in. We can't always trust __PACKAGE__. For
9132 sub web_libs_package
9134 if ($called_from_webmin_core) {
9135 return "WebminCore";
9140 =head2 get_userdb_string
9142 Returns the URL-style string for connecting to the users and groups database
9145 sub get_userdb_string
9147 return undef if ($main::no_miniserv_userdb);
9149 &get_miniserv_config(\%miniserv);
9150 return $miniserv{'userdb'};
9153 =head2 connect_userdb(string)
9155 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9156 On failure returns an error message string. In an array context, returns the
9163 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9164 if ($proto eq "mysql") {
9165 # Connect to MySQL with DBI
9166 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9167 $drh || return $text{'sql_emysqldriver'};
9168 my ($host, $port) = split(/:/, $host);
9169 my $cstr = "database=$prefix;host=$host";
9170 $cstr .= ";port=$port" if ($port);
9171 my $dbh = $drh->connect($cstr, $user, $pass, { });
9172 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9173 $dbh->{'AutoCommit'} = 1;
9174 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9176 elsif ($proto eq "postgresql") {
9177 # Connect to PostgreSQL with DBI
9178 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9179 $drh || return $text{'sql_epostgresqldriver'};
9180 my ($host, $port) = split(/:/, $host);
9181 my $cstr = "dbname=$prefix;host=$host";
9182 $cstr .= ";port=$port" if ($port);
9183 my $dbh = $drh->connect($cstr, $user, $pass);
9184 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9185 $dbh->{'AutoCommit'} = 1;
9186 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9188 elsif ($proto eq "ldap") {
9189 # Connect with perl LDAP module
9190 eval "use Net::LDAP";
9191 $@ && return $text{'sql_eldapdriver'};
9192 my ($host, $port) = split(/:/, $host);
9193 my $scheme = $args->{'scheme'} || 'ldap';
9195 $port = $scheme eq 'ldaps' ? 636 : 389;
9197 my $ldap = Net::LDAP->new($host,
9199 'scheme' => $scheme);
9200 $ldap || return &text('sql_eldapconnect', $host);
9202 if ($args->{'tls'}) {
9203 # Switch to TLS mode
9204 eval { $mesg = $ldap->start_tls(); };
9205 if ($@ || !$mesg || $mesg->code) {
9206 return &text('sql_eldaptls',
9207 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9210 # Login to the server
9212 $mesg = $ldap->bind(dn => $user, password => $pass);
9215 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9217 if (!$mesg || $mesg->code) {
9218 return &text('sql_eldaplogin', $user,
9219 $mesg ? $mesg->error : "Unknown error");
9221 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9224 return "Unknown protocol $proto";
9228 =head2 disconnect_userdb(string, &handle)
9230 Closes a handle opened by connect_userdb
9233 sub disconnect_userdb
9236 if ($str =~ /^(mysql|postgresql):/) {
9241 elsif ($str =~ /^ldap:/) {
9248 =head2 split_userdb_string(string)
9250 Converts a string like mysql://user:pass@host/db into separate parts
9253 sub split_userdb_string
9256 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9257 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9258 ($1, $2, $3, $4, $5, $7);
9259 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9260 return ($proto, $user, $pass, $host, $prefix, \%args);
9265 $done_web_lib_funcs = 1;