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
1743 my $rv = $dbh->search(
1745 filter => '(objectClass='.
1746 $args->{'userclass'}.')',
1748 attrs => [ 'cn', 'webminModule' ]);
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, $prefix, $args) =
4028 $userdb ? &connect_userdb($userdb) : ( );
4030 if ($proto eq "mysql" || $proto eq "postgresql") {
4031 # Read attrs from SQL
4032 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 = ?");
4033 if ($cmd && $cmd->execute($base_remote_user)) {
4034 while(my ($attr, $value) = $cmd->fetchrow()) {
4035 $remote_user_attrs{$attr} = $value;
4040 elsif ($proto eq "ldap") {
4041 # Read attrs from LDAP
4042 my $rv = $dbh->search(
4044 filter => '(&(cn='.$base_remote_user.')'.
4046 $args->{'userclass'}.'))',
4048 my ($u) = $rv && !$rv->code ? $rv->all_entries : ( );
4050 foreach $la ($u->get_value('webminAttr')) {
4051 my ($attr, $value) = split(/=/, $la, 2);
4052 $remote_user_attrs{$attr} = $value;
4056 &disconnect_userdb($userdb, $dbh);
4061 # Find and load the configuration file for this module
4062 my (@ruinfo, $rgroup);
4063 $module_config_directory = "$config_directory/$module_name";
4064 if (&get_product_name() eq "usermin" &&
4065 -r "$module_config_directory/config.$remote_user") {
4067 $module_config_file = "$module_config_directory/config.$remote_user";
4069 elsif (&get_product_name() eq "usermin" &&
4070 (@ruinfo = getpwnam($remote_user)) &&
4071 ($rgroup = getgrgid($ruinfo[3])) &&
4072 -r "$module_config_directory/config.\@$rgroup") {
4073 # Based on group name
4074 $module_config_file = "$module_config_directory/config.\@$rgroup";
4078 $module_config_file = "$module_config_directory/config";
4081 &read_file_cached($module_config_file, \%config);
4083 # Fix up windows-specific substitutions in values
4084 foreach my $k (keys %config) {
4085 if ($config{$k} =~ /\$\{systemroot\}/) {
4086 my $root = &get_windows_root();
4087 $config{$k} =~ s/\$\{systemroot\}/$root/g;
4092 # Record the initial module
4093 $main::initial_module_name ||= $module_name;
4095 # Set some useful variables
4097 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
4098 $gconfig{'mobile_theme'} :
4099 defined($remote_user_attrs{'theme'}) ?
4100 $remote_user_attrs{'theme'} :
4101 defined($gconfig{'theme_'.$remote_user}) ?
4102 $gconfig{'theme_'.$remote_user} :
4103 defined($gconfig{'theme_'.$base_remote_user}) ?
4104 $gconfig{'theme_'.$base_remote_user} :
4106 @current_themes = split(/\s+/, $current_themes);
4107 $current_theme = $current_themes[0];
4108 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
4109 $theme_root_directory = $theme_root_directories[0];
4110 @theme_configs = ( );
4111 foreach my $troot (@theme_root_directories) {
4113 &read_file_cached("$troot/config", \%onetconfig);
4114 &read_file_cached("$troot/config", \%tconfig);
4115 push(@theme_configs, \%onetconfig);
4117 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
4118 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
4120 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
4121 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
4123 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
4124 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
4125 if ($tconfig{'preload_functions'}) {
4126 # Force load of theme functions right now, if requested
4127 &load_theme_library();
4129 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
4130 # Load the theme's Webmin:: package classes
4131 do "$theme_root_directory/$tconfig{'oofunctions'}";
4136 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
4137 : "$var_directory/webmin.log";
4139 # Load language strings into %text
4140 my @langs = &list_languages();
4142 if ($gconfig{'acceptlang'}) {
4143 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
4144 my ($al) = grep { $_->{'lang'} eq $a } @langs;
4146 $accepted_lang = $al->{'lang'};
4151 $current_lang = $force_lang ? $force_lang :
4152 $accepted_lang ? $accepted_lang :
4153 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
4154 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
4155 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
4156 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
4157 foreach my $l (@langs) {
4158 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
4160 @lang_order_list = &unique($default_lang,
4161 split(/:/, $current_lang_info->{'fallback'}),
4163 %text = &load_language($module_name);
4164 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
4166 # Get the %module_info for this module
4168 my ($mi) = grep { $_->{'dir'} eq $module_name }
4169 &get_all_module_infos(2);
4170 %module_info = %$mi;
4171 $module_root_directory = &module_root_directory($module_name);
4174 if ($module_name && !$main::no_acl_check &&
4175 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
4176 # Check if the HTTP user can access this module
4177 if (!&foreign_available($module_name)) {
4178 if (!&foreign_check($module_name)) {
4179 &error(&text('emodulecheck',
4180 "<i>$module_info{'desc'}</i>"));
4183 &error(&text('emodule', "<i>$u</i>",
4184 "<i>$module_info{'desc'}</i>"));
4187 $main::no_acl_check++;
4190 # Check the Referer: header for nasty redirects
4191 my @referers = split(/\s+/, $gconfig{'referers'});
4193 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4196 my $http_host = $ENV{'HTTP_HOST'};
4197 $http_host =~ s/:\d+$//;
4198 my $unsafe_index = $unsafe_index_cgi ||
4199 &get_module_variable('$unsafe_index_cgi');
4201 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4202 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4204 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4205 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4206 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4207 ($referer_site && $referer_site ne $http_host &&
4208 &indexof($referer_site, @referers) < 0 ||
4209 !$referer_site && $gconfig{'referers_none'}) &&
4210 !$trust_unknown_referers &&
4211 !&get_module_variable('$trust_unknown_referers')) {
4212 # Looks like a link from elsewhere .. show an error
4213 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4215 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4216 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4217 if ($referer_site) {
4219 print &text('referer_warn',
4220 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
4222 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4223 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4226 # No referer info given
4227 print &text('referer_warn_unknown', $url),"<p>\n";
4228 print &text('referer_fix1u'),"<p>\n";
4229 print &text('referer_fix2u'),"<p>\n";
4233 &footer("/", $text{'index'});
4236 $main::no_referers_check++;
4237 $main::completed_referers_check++;
4239 # Call theme post-init
4240 if (defined(&theme_post_init_config)) {
4241 &theme_post_init_config(@_);
4244 # Record that we have done the calling library in this package
4245 my ($callpkg, $lib) = caller();
4247 $main::done_foreign_require{$callpkg,$lib} = 1;
4249 # If a licence checking is enabled, do it now
4250 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4251 &foreign_check($gconfig{'licence_module'}) &&
4252 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4253 my $oldpwd = &get_current_dir();
4254 $main::done_licence_module_check++;
4255 $main::licence_module = $gconfig{'licence_module'};
4256 &foreign_require($main::licence_module, "licence_check.pl");
4257 ($main::licence_status, $main::licence_message) =
4258 &foreign_call($main::licence_module, "check_licence");
4262 # Export global variables to caller
4263 if ($main::export_to_caller) {
4264 foreach my $v ('$config_file', '%gconfig', '$null_file',
4265 '$path_separator', '@root_directories',
4266 '$root_directory', '$module_name',
4267 '$base_remote_user', '$remote_user',
4268 '$remote_user_proto', '%remote_user_attrs',
4269 '$module_config_directory', '$module_config_file',
4270 '%config', '@current_themes', '$current_theme',
4271 '@theme_root_directories', '$theme_root_directory',
4272 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4273 '$webmin_logfile', '$current_lang',
4274 '$current_lang_info', '@lang_order_list', '%text',
4275 '%module_info', '$module_root_directory') {
4276 my ($vt, $vn) = split('', $v, 2);
4277 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4284 =head2 load_language([module], [directory])
4286 Returns a hashtable mapping text codes to strings in the appropriate language,
4287 based on the $current_lang global variable, which is in turn set based on
4288 the Webmin user's selection. The optional module parameter tells the function
4289 which module to load strings for, and defaults to the calling module. The
4290 optional directory parameter can be used to load strings from a directory
4293 In regular module development you will never need to call this function
4294 directly, as init_config calls it for you, and places the module's strings
4295 into the %text hash.
4301 my $root = $root_directory;
4302 my $ol = $gconfig{'overlang'};
4303 my ($dir) = ($_[1] || "lang");
4305 # Read global lang files
4306 foreach my $o (@lang_order_list) {
4307 my $ok = &read_file_cached("$root/$dir/$o", \%text);
4308 return () if (!$ok && $o eq $default_lang);
4311 foreach my $o (@lang_order_list) {
4312 &read_file_cached("$root/$ol/$o", \%text);
4315 &read_file_cached("$config_directory/custom-lang", \%text);
4318 # Read module's lang files
4319 my $mdir = &module_root_directory($_[0]);
4320 foreach my $o (@lang_order_list) {
4321 &read_file_cached("$mdir/$dir/$o", \%text);
4324 foreach $o (@lang_order_list) {
4325 &read_file_cached("$mdir/$ol/$o", \%text);
4328 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4330 foreach $k (keys %text) {
4331 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4334 if (defined(&theme_load_language)) {
4335 &theme_load_language(\%text, $_[0]);
4340 =head2 text_subs(string)
4342 Used internally by load_language to expand $code substitutions in language
4348 if (substr($_[0], 0, 8) eq "include:") {
4351 open(INCLUDE, substr($_[0], 8));
4359 my $t = $_[1]->{$_[0]};
4360 return defined($t) ? $t : '$'.$_[0];
4364 =head2 text(message, [substitute]+)
4366 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4367 the substitute parameters. This makes it easy to use strings with placeholders
4368 that get replaced with programmatically generated text. For example :
4370 print &text('index_hello', $remote_user),"<p>\n";
4375 my $t = &get_module_variable('%text', 1);
4376 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4377 for(my $i=1; $i<@_; $i++) {
4378 $rv =~ s/\$$i/$_[$i]/g;
4383 =head2 encode_base64(string)
4385 Encodes a string into base64 format, for use in MIME email or HTTP
4386 authorization headers.
4392 pos($_[0]) = 0; # ensure start at the beginning
4393 while ($_[0] =~ /(.{1,57})/gs) {
4394 $res .= substr(pack('u57', $1), 1)."\n";
4397 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4398 my $padding = (3 - length($_[0]) % 3) % 3;
4399 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4403 =head2 decode_base64(string)
4405 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4412 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4413 if (length($str) % 4) {
4416 $str =~ s/=+$//; # remove padding
4417 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4418 while ($str =~ /(.{1,60})/gs) {
4419 my $len = chr(32 + length($1)*3/4); # compute length byte
4420 $res .= unpack("u", $len . $1 ); # uudecode
4425 =head2 get_module_info(module, [noclone], [forcache])
4427 Returns a hash containg details of the given module. Some useful keys are :
4429 =item dir - The module directory, like sendmail.
4431 =item desc - Human-readable description, in the current users' language.
4433 =item version - Optional module version number.
4435 =item os_support - List of supported operating systems and versions.
4437 =item category - Category on Webmin's left menu, like net.
4442 return () if ($_[0] =~ /^\./);
4443 my (%rv, $clone, $o);
4444 my $mdir = &module_root_directory($_[0]);
4445 &read_file_cached("$mdir/module.info", \%rv) || return ();
4447 foreach $o (@lang_order_list) {
4448 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4449 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4451 if ($clone && !$_[1] && $config_directory) {
4452 $rv{'clone'} = $rv{'desc'};
4453 &read_file("$config_directory/$_[0]/clone", \%rv);
4456 my %module_categories;
4457 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4458 my $pn = &get_product_name();
4459 if (defined($rv{'category_'.$pn})) {
4460 # Can override category for webmin/usermin
4461 $rv{'category'} = $rv{'category_'.$pn};
4463 $rv{'realcategory'} = $rv{'category'};
4464 $rv{'category'} = $module_categories{$_[0]}
4465 if (defined($module_categories{$_[0]}));
4467 # Apply description overrides
4468 $rv{'realdesc'} = $rv{'desc'};
4470 &read_file_cached("$config_directory/webmin.descs", \%descs);
4471 if ($descs{$_[0]." ".$current_lang}) {
4472 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4474 elsif ($descs{$_[0]}) {
4475 $rv{'desc'} = $descs{$_[0]};
4479 # Apply per-user description overridde
4480 my %gaccess = &get_module_acl(undef, "");
4481 if ($gaccess{'desc_'.$_[0]}) {
4482 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4486 if ($rv{'longdesc'}) {
4487 # All standard modules have an index.cgi
4488 $rv{'index_link'} = 'index.cgi';
4491 # Call theme-specific override function
4492 if (defined(&theme_get_module_info)) {
4493 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4499 =head2 get_all_module_infos(cachemode)
4501 Returns a list contains the information on all modules in this webmin
4502 install, including clones. Uses caching to reduce the number of module.info
4503 files that need to be read. Each element of the array is a hash reference
4504 in the same format as returned by get_module_info. The cache mode flag can be :
4505 0 = read and write, 1 = don't read or write, 2 = read only
4508 sub get_all_module_infos
4512 # Is the cache out of date? (ie. have any of the root's changed?)
4513 my $cache_file = "$config_directory/module.infos.cache";
4515 if (&read_file_cached($cache_file, \%cache)) {
4516 foreach my $r (@root_directories) {
4518 if ($st[9] != $cache{'mtime_'.$r}) {
4528 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4529 # Can use existing module.info cache
4531 foreach my $k (keys %cache) {
4532 if ($k =~ /^(\S+) (\S+)$/) {
4533 $mods{$1}->{$2} = $cache{$k};
4536 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4539 # Need to rebuild cache
4541 foreach my $r (@root_directories) {
4543 foreach my $m (readdir(DIR)) {
4544 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4545 my %minfo = &get_module_info($m, 0, 1);
4546 next if (!%minfo || !$minfo{'dir'});
4548 foreach $k (keys %minfo) {
4549 $cache{"${m} ${k}"} = $minfo{$k};
4554 $cache{'mtime_'.$r} = $st[9];
4556 $cache{'lang'} = $current_lang;
4557 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4560 # Override descriptions for modules for current user
4561 my %gaccess = &get_module_acl(undef, "");
4562 foreach my $m (@rv) {
4563 if ($gaccess{"desc_".$m->{'dir'}}) {
4564 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4568 # Apply installed flags
4570 &read_file_cached("$config_directory/installed.cache", \%installed);
4571 foreach my $m (@rv) {
4572 $m->{'installed'} = $installed{$m->{'dir'}};
4578 =head2 get_theme_info(theme)
4580 Returns a hash containing a theme's details, taken from it's theme.info file.
4581 Some useful keys are :
4583 =item dir - The theme directory, like blue-theme.
4585 =item desc - Human-readable description, in the current users' language.
4587 =item version - Optional module version number.
4589 =item os_support - List of supported operating systems and versions.
4594 return () if ($_[0] =~ /^\./);
4596 my $tdir = &module_root_directory($_[0]);
4597 &read_file("$tdir/theme.info", \%rv) || return ();
4598 foreach my $o (@lang_order_list) {
4599 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4605 =head2 list_languages
4607 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4608 Each is a hash reference with the following keys :
4610 =item lang - The short language code, like es for Spanish.
4612 =item desc - A human-readable description, in English.
4614 =item charset - An optional character set to use when displaying the language.
4616 =item titles - Set to 1 only if Webmin has title images for the language.
4618 =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.
4623 if (!@main::list_languages_cache) {
4626 open(LANG, "$root_directory/lang_list.txt");
4628 if (/^(\S+)\s+(.*)/) {
4629 my $l = { 'desc' => $2 };
4630 foreach $o (split(/,/, $1)) {
4631 if ($o =~ /^([^=]+)=(.*)$/) {
4635 $l->{'index'} = scalar(@rv);
4636 push(@main::list_languages_cache, $l);
4640 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4641 @main::list_languages_cache;
4643 return @main::list_languages_cache;
4646 =head2 read_env_file(file, &hash)
4648 Similar to Webmin's read_file function, but handles files containing shell
4649 environment variables formatted like :
4654 The file parameter is the full path to the file to read, and hash a Perl hash
4655 ref to read names and values into.
4661 &open_readfile(FILE, $_[0]) || return 0;
4664 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4665 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4666 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4674 =head2 write_env_file(file, &hash, [export])
4676 Writes out a hash to a file in name='value' format, suitable for use in a shell
4677 script. The parameters are :
4679 =item file - Full path for a file to write to
4681 =item hash - Hash reference of names and values to write.
4683 =item export - If set to 1, preceed each variable setting with the word 'export'.
4688 my $exp = $_[2] ? "export " : "";
4689 &open_tempfile(FILE, ">$_[0]");
4690 foreach my $k (keys %{$_[1]}) {
4691 my $v = $_[1]->{$k};
4692 if ($v =~ /^\S+$/) {
4693 &print_tempfile(FILE, "$exp$k=$v\n");
4696 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4699 &close_tempfile(FILE);
4702 =head2 lock_file(filename, [readonly], [forcefile])
4704 Lock a file for exclusive access. If the file is already locked, spin
4705 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4706 to work OK. The parameters are :
4708 =item filename - File or directory to lock.
4710 =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.
4712 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4717 my $realfile = &translate_filename($_[0]);
4718 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4719 my $no_lock = !&can_lock_file($realfile);
4720 my $lock_tries_count = 0;
4723 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4728 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4731 # Create the .lock file
4732 open(LOCKING, ">$realfile.lock") || return 0;
4733 my $lck = eval "flock(LOCKING, 2+4)";
4735 # Lock of lock file failed! Wait till later
4738 print LOCKING $$,"\n";
4739 eval "flock(LOCKING, 8)";
4742 $main::locked_file_list{$realfile} = int($_[1]);
4743 push(@main::temporary_files, "$realfile.lock");
4744 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4745 !&get_module_variable('$no_log_file_changes') &&
4747 # Grab a copy of this file for later diffing
4749 $main::locked_file_data{$realfile} = undef;
4751 $main::locked_file_type{$realfile} = 1;
4752 $main::locked_file_data{$realfile} = '';
4754 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4755 $main::locked_file_type{$realfile} = 2;
4756 $main::locked_file_data{$realfile} = $lnk;
4758 elsif (open(ORIGFILE, $realfile)) {
4759 $main::locked_file_type{$realfile} = 0;
4760 $main::locked_file_data{$realfile} = '';
4763 $main::locked_file_data{$realfile} .=$_;
4772 if ($lock_tries_count++ > 5*60) {
4773 # Give up after 5 minutes
4774 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4780 =head2 unlock_file(filename)
4782 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4783 file changes is enabled, then at unlock file a diff will be taken between the
4784 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4785 called. This can then be viewed in the Webmin Actions Log module.
4790 my $realfile = &translate_filename($_[0]);
4791 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4792 unlink("$realfile.lock") if (&can_lock_file($realfile));
4793 delete($main::locked_file_list{$realfile});
4794 if (exists($main::locked_file_data{$realfile})) {
4795 # Diff the new file with the old
4797 my $lnk = readlink($realfile);
4798 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4799 my $oldtype = $main::locked_file_type{$realfile};
4800 my $new = !defined($main::locked_file_data{$realfile});
4801 if ($new && !-e _) {
4802 # file doesn't exist, and never did! do nothing ..
4804 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4805 # is (or was) a directory ..
4806 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4807 push(@main::locked_file_diff,
4808 { 'type' => 'mkdir', 'object' => $realfile });
4810 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4811 push(@main::locked_file_diff,
4812 { 'type' => 'rmdir', 'object' => $realfile });
4815 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4816 # is (or was) a symlink ..
4817 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4818 push(@main::locked_file_diff,
4819 { 'type' => 'symlink', 'object' => $realfile,
4822 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4823 push(@main::locked_file_diff,
4824 { 'type' => 'unsymlink', 'object' => $realfile,
4825 'data' => $main::locked_file_data{$realfile} });
4827 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4828 push(@main::locked_file_diff,
4829 { 'type' => 'resymlink', 'object' => $realfile,
4834 # is a file, or has changed type?!
4835 my ($diff, $delete_file);
4836 my $type = "modify";
4838 open(NEWFILE, ">$realfile");
4843 if (!defined($main::locked_file_data{$realfile})) {
4846 open(ORIGFILE, ">$realfile.webminorig");
4847 print ORIGFILE $main::locked_file_data{$realfile};
4849 $diff = &backquote_command(
4850 "diff ".quotemeta("$realfile.webminorig")." ".
4851 quotemeta($realfile)." 2>/dev/null");
4852 push(@main::locked_file_diff,
4853 { 'type' => $type, 'object' => $realfile,
4854 'data' => $diff } ) if ($diff);
4855 unlink("$realfile.webminorig");
4856 unlink($realfile) if ($delete_file);
4859 if ($gconfig{'logfullfiles'}) {
4860 # Add file details to list of those to fully log
4861 $main::orig_file_data{$realfile} ||=
4862 $main::locked_file_data{$realfile};
4863 $main::orig_file_type{$realfile} ||=
4864 $main::locked_file_type{$realfile};
4867 delete($main::locked_file_data{$realfile});
4868 delete($main::locked_file_type{$realfile});
4872 =head2 test_lock(file)
4874 Returns 1 if some file is currently locked, 0 if not.
4879 my $realfile = &translate_filename($_[0]);
4880 return 0 if (!$_[0]);
4881 return 1 if (defined($main::locked_file_list{$realfile}));
4882 return 0 if (!&can_lock_file($realfile));
4884 if (open(LOCKING, "$realfile.lock")) {
4889 return $pid && kill(0, $pid);
4892 =head2 unlock_all_files
4894 Unlocks all files locked by the current script.
4897 sub unlock_all_files
4899 foreach $f (keys %main::locked_file_list) {
4904 =head2 can_lock_file(file)
4906 Returns 1 if some file should be locked, based on the settings in the
4907 Webmin Configuration module. For internal use by lock_file only.
4912 if (&is_readonly_mode()) {
4913 return 0; # never lock in read-only mode
4915 elsif ($gconfig{'lockmode'} == 0) {
4918 elsif ($gconfig{'lockmode'} == 1) {
4922 # Check if under any of the directories
4924 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4925 if (&same_file($d, $_[0]) ||
4926 &is_under_directory($d, $_[0])) {
4930 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4934 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4936 Log some action taken by a user. This is typically called at the end of a
4937 script, once all file changes are complete and all commands run. The
4940 =item action - A short code for the action being performed, like 'create'.
4942 =item type - A code for the type of object the action is performed to, like 'user'.
4944 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4946 =item params - A hash ref of additional information about the action.
4948 =item module - Name of the module in which the action was performed, which defaults to the current module.
4950 =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.
4952 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4954 =item client-ip - IP address of the browser that performed the action.
4959 return if (!$gconfig{'log'} || &is_readonly_mode());
4960 my $m = $_[4] ? $_[4] : &get_module_name();
4962 if ($gconfig{'logclear'}) {
4963 # check if it is time to clear the log
4964 my @st = stat("$webmin_logfile.time");
4965 my $write_logtime = 0;
4967 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4968 # clear logfile and all diff files
4969 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4970 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4971 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4972 unlink($webmin_logfile);
4979 if ($write_logtime) {
4980 open(LOGTIME, ">$webmin_logfile.time");
4981 print LOGTIME time(),"\n";
4986 # If an action script directory is defined, call the appropriate scripts
4987 if ($gconfig{'action_script_dir'}) {
4988 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4989 my ($basedir) = $gconfig{'action_script_dir'};
4991 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4994 opendir(DIR, $dir) or die "Can't open $dir: $!";
4995 while (defined($file = readdir(DIR))) {
4996 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4997 if (-x "$dir/$file") {
4998 # Call a script notifying it of the action
5000 $ENV{'ACTION_MODULE'} = &get_module_name();
5001 $ENV{'ACTION_ACTION'} = $_[0];
5002 $ENV{'ACTION_TYPE'} = $_[1];
5003 $ENV{'ACTION_OBJECT'} = $_[2];
5004 $ENV{'ACTION_SCRIPT'} = $script_name;
5005 foreach my $p (keys %param) {
5006 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
5008 system("$dir/$file", @_,
5009 "<$null_file", ">$null_file", "2>&1");
5017 # should logging be done at all?
5018 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
5019 split(/\s+/, $gconfig{'logusers'})) < 0);
5020 return if ($gconfig{'logmodules'} && &indexof($m,
5021 split(/\s+/, $gconfig{'logmodules'})) < 0);
5025 my @tm = localtime($now);
5026 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
5027 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
5028 $main::action_id_count++;
5029 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
5030 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5031 $tm[2], $tm[1], $tm[0],
5032 $remote_user || '-',
5033 $main::session_id || '-',
5034 $_[7] || $ENV{'REMOTE_HOST'} || '-',
5035 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
5036 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
5038 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
5039 my $v = $_[3]->{$k};
5045 elsif (ref($v) eq 'ARRAY') {
5049 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5050 $line .= " $k='$vv'";
5054 foreach $vv (split(/\0/, $v)) {
5056 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
5057 $line .= " $k='$vv'";
5060 $param{$k} = join(" ", @pv);
5062 open(WEBMINLOG, ">>$webmin_logfile");
5063 print WEBMINLOG $line,"\n";
5065 if ($gconfig{'logperms'}) {
5066 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
5069 chmod(0600, $webmin_logfile);
5072 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5073 # Find and record the changes made to any locked files, or commands run
5075 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
5076 foreach my $d (@main::locked_file_diff) {
5077 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
5078 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
5079 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
5080 print DIFFLOG $d->{'data'};
5082 if ($d->{'input'}) {
5083 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5084 print DIFFLOG $d->{'input'};
5087 if ($gconfig{'logperms'}) {
5088 chmod(oct($gconfig{'logperms'}),
5089 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
5090 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
5094 @main::locked_file_diff = undef;
5096 if ($gconfig{'logfullfiles'}) {
5097 # Save the original contents of any modified files
5099 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
5100 foreach my $f (keys %main::orig_file_data) {
5101 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
5102 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
5103 if (!defined($main::orig_file_type{$f})) {
5104 print ORIGLOG -1," ",$f,"\n";
5107 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
5109 print ORIGLOG $main::orig_file_data{$f};
5111 if ($gconfig{'logperms'}) {
5112 chmod(oct($gconfig{'logperms'}),
5113 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
5117 %main::orig_file_data = undef;
5118 %main::orig_file_type = undef;
5122 if ($gconfig{'logsyslog'}) {
5123 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
5124 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
5125 setlogsock("inet");';
5127 # Syslog module is installed .. try to convert to a
5128 # human-readable form
5130 my $mod = &get_module_name();
5131 my $mdir = module_root_directory($mod);
5132 if (-r "$mdir/log_parser.pl") {
5133 &foreign_require($mod, "log_parser.pl");
5135 foreach my $k (keys %{$_[3]}) {
5136 my $v = $_[3]->{$k};
5137 if (ref($v) eq 'ARRAY') {
5138 $params{$k} = join("\0", @$v);
5144 $msg = &foreign_call($mod, "parse_webmin_log",
5145 $remote_user, $script_name,
5146 $_[0], $_[1], $_[2], \%params);
5147 $msg =~ s/<[^>]*>//g; # Remove tags
5149 elsif ($_[0] eq "_config_") {
5150 my %wtext = &load_language("webminlog");
5151 $msg = $wtext{'search_config'};
5153 $msg ||= "$_[0] $_[1] $_[2]";
5154 my %info = &get_module_info($m);
5155 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
5160 =head2 additional_log(type, object, data, [input])
5162 Records additional log data for an upcoming call to webmin_log, such
5163 as a command that was run or SQL that was executed. Typically you will never
5164 need to call this function directory.
5169 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
5170 push(@main::locked_file_diff,
5171 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
5172 'input' => $_[3] } );
5176 =head2 webmin_debug_log(type, message)
5178 Write something to the Webmin debug log. For internal use only.
5181 sub webmin_debug_log
5183 my ($type, $msg) = @_;
5184 return 0 if (!$main::opened_debug_log);
5185 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5186 if ($gconfig{'debug_modules'}) {
5187 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5188 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5191 my @tm = localtime($now);
5193 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
5194 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5195 $tm[2], $tm[1], $tm[0],
5196 $remote_user || "-",
5197 $ENV{'REMOTE_HOST'} || "-",
5198 &get_module_name() || "-",
5201 seek(main::DEBUGLOG, 0, 2);
5202 print main::DEBUGLOG $line."\n";
5206 =head2 system_logged(command)
5208 Just calls the Perl system() function, but also logs the command run.
5213 if (&is_readonly_mode()) {
5214 print STDERR "Vetoing command $_[0]\n";
5217 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5218 my $cmd = join(" ", @realcmd);
5220 if ($cmd =~ s/(\s*&\s*)$//) {
5223 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5224 $cmd =~ s/^\((.*)\)\s*$/$1/;
5226 &additional_log('exec', undef, $cmd);
5227 return system(@realcmd);
5230 =head2 backquote_logged(command)
5232 Executes a command and returns the output (like `command`), but also logs it.
5235 sub backquote_logged
5237 if (&is_readonly_mode()) {
5239 print STDERR "Vetoing command $_[0]\n";
5242 my $realcmd = &translate_command($_[0]);
5245 if ($cmd =~ s/(\s*&\s*)$//) {
5248 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5249 $cmd =~ s/^\((.*)\)\s*$/$1/;
5251 &additional_log('exec', undef, $cmd);
5252 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5256 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5258 Runs some command, waiting at most the given number of seconds for it to
5259 complete, and returns the output. The maxlines parameter sets the number
5260 of lines of output to capture. The safe parameter should be set to 1 if the
5261 command is safe for read-only mode users to run.
5264 sub backquote_with_timeout
5266 my $realcmd = &translate_command($_[0]);
5267 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5268 if ($gconfig{'debug_what_cmd'});
5270 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5275 my $elapsed = time() - $start;
5276 last if ($elapsed > $_[1]);
5278 vec($rmask, fileno(OUT), 1) = 1;
5279 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5280 last if (!$sel || $sel < 0);
5282 last if (!defined($line));
5285 if ($_[3] && $linecount >= $_[3]) {
5290 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5294 return wantarray ? ($out, $timed_out) : $out;
5297 =head2 backquote_command(command, safe?)
5299 Executes a command and returns the output (like `command`), subject to
5300 command translation. The safe parameter should be set to 1 if the command
5301 is safe for read-only mode users to run.
5304 sub backquote_command
5306 if (&is_readonly_mode() && !$_[1]) {
5307 print STDERR "Vetoing command $_[0]\n";
5311 my $realcmd = &translate_command($_[0]);
5312 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5316 =head2 kill_logged(signal, pid, ...)
5318 Like Perl's built-in kill function, but also logs the fact that some process
5319 was killed. On Windows, falls back to calling process.exe to terminate a
5325 return scalar(@_)-1 if (&is_readonly_mode());
5326 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5327 if ($gconfig{'debug_what_procs'});
5328 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5329 if ($gconfig{'os_type'} eq 'windows') {
5330 # Emulate some kills with process.exe
5331 my $arg = $_[0] eq "KILL" ? "-k" :
5332 $_[0] eq "TERM" ? "-q" :
5333 $_[0] eq "STOP" ? "-s" :
5334 $_[0] eq "CONT" ? "-r" : undef;
5336 foreach my $p (@_[1..@_-1]) {
5338 $ok ||= kill($_[0], $p);
5341 &execute_command("process $arg $p");
5353 =head2 rename_logged(old, new)
5355 Re-names a file and logs the rename. If the old and new files are on different
5356 filesystems, calls mv or the Windows rename function to do the job.
5361 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5362 return &rename_file($_[0], $_[1]);
5365 =head2 rename_file(old, new)
5367 Renames a file or directory. If the old and new files are on different
5368 filesystems, calls mv or the Windows rename function to do the job.
5373 if (&is_readonly_mode()) {
5374 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5377 my $src = &translate_filename($_[0]);
5378 my $dst = &translate_filename($_[1]);
5379 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5380 if ($gconfig{'debug_what_ops'});
5381 my $ok = rename($src, $dst);
5382 if (!$ok && $! !~ /permission/i) {
5383 # Try the mv command, in case this is a cross-filesystem rename
5384 if ($gconfig{'os_type'} eq 'windows') {
5385 # Need to use rename
5386 my $out = &backquote_command("rename ".quotemeta($_[0]).
5387 " ".quotemeta($_[1])." 2>&1");
5389 $! = $out if (!$ok);
5393 my $out = &backquote_command("mv ".quotemeta($_[0]).
5394 " ".quotemeta($_[1])." 2>&1");
5396 $! = $out if (!$ok);
5402 =head2 symlink_logged(src, dest)
5404 Create a symlink, and logs it. Effectively does the same thing as the Perl
5411 my $rv = &symlink_file($_[0], $_[1]);
5412 &unlock_file($_[1]);
5416 =head2 symlink_file(src, dest)
5418 Creates a soft link, unless in read-only mode. Effectively does the same thing
5419 as the Perl symlink function.
5424 if (&is_readonly_mode()) {
5425 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5428 my $src = &translate_filename($_[0]);
5429 my $dst = &translate_filename($_[1]);
5430 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5431 if ($gconfig{'debug_what_ops'});
5432 return symlink($src, $dst);
5435 =head2 link_file(src, dest)
5437 Creates a hard link, unless in read-only mode. The existing new link file
5438 will be deleted if necessary. Effectively the same as Perl's link function.
5443 if (&is_readonly_mode()) {
5444 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5447 my $src = &translate_filename($_[0]);
5448 my $dst = &translate_filename($_[1]);
5449 &webmin_debug_log('LINK', "src=$src dst=$dst")
5450 if ($gconfig{'debug_what_ops'});
5451 unlink($dst); # make sure link works
5452 return link($src, $dst);
5455 =head2 make_dir(dir, perms, recursive)
5457 Creates a directory and sets permissions on it, unless in read-only mode.
5458 The perms parameter sets the octal permissions to apply, which unlike Perl's
5459 mkdir will really get set. The recursive flag can be set to 1 to have the
5460 function create parent directories too.
5465 my ($dir, $perms, $recur) = @_;
5466 if (&is_readonly_mode()) {
5467 print STDERR "Vetoing directory $dir\n";
5470 $dir = &translate_filename($dir);
5471 my $exists = -d $dir ? 1 : 0;
5472 return 1 if ($exists && $recur); # already exists
5473 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5474 my $rv = mkdir($dir, $perms);
5475 if (!$rv && $recur) {
5476 # Failed .. try mkdir -p
5477 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5478 my $ex = &execute_command("mkdir $param "."e_path($dir));
5484 chmod($perms, $dir);
5489 =head2 set_ownership_permissions(user, group, perms, file, ...)
5491 Sets the user, group owner and permissions on some files. The parameters are :
5493 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5495 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5497 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5499 =item file - One or more files or directories to modify.
5502 sub set_ownership_permissions
5504 my ($user, $group, $perms, @files) = @_;
5505 if (&is_readonly_mode()) {
5506 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5509 @files = map { &translate_filename($_) } @files;
5510 if ($gconfig{'debug_what_ops'}) {
5511 foreach my $f (@files) {
5512 &webmin_debug_log('PERMS',
5513 "file=$f user=$user group=$group perms=$perms");
5517 if (defined($user)) {
5518 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5520 if (defined($group)) {
5521 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5524 my @uinfo = getpwuid($uid);
5527 $rv = chown($uid, $gid, @files);
5529 if ($rv && defined($perms)) {
5530 $rv = chmod($perms, @files);
5535 =head2 unlink_logged(file, ...)
5537 Like Perl's unlink function, but locks the files beforehand and un-locks them
5538 after so that the deletion is logged by Webmin.
5544 foreach my $f (@_) {
5545 if (!&test_lock($f)) {
5550 my @rv = &unlink_file(@_);
5551 foreach my $f (@_) {
5556 return wantarray ? @rv : $rv[0];
5559 =head2 unlink_file(file, ...)
5561 Deletes some files or directories. Like Perl's unlink function, but also
5562 recursively deletes directories with the rm command if needed.
5567 return 1 if (&is_readonly_mode());
5570 foreach my $f (@_) {
5571 &unflush_file_lines($f);
5572 my $realf = &translate_filename($f);
5573 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5575 if (!rmdir($realf)) {
5577 if ($gconfig{'os_type'} eq 'windows') {
5578 # Call del and rmdir commands
5581 my $out = `del /q "$qm" 2>&1`;
5583 $out = `rmdir "$qm" 2>&1`;
5588 my $qm = quotemeta($realf);
5589 $out = `rm -rf $qm 2>&1`;
5598 if (!unlink($realf)) {
5604 return wantarray ? ($rv, $err) : $rv;
5607 =head2 copy_source_dest(source, dest)
5609 Copy some file or directory to a new location. Returns 1 on success, or 0
5610 on failure - also sets $! on failure. If the source is a directory, uses
5611 piped tar commands to copy a whole directory structure including permissions
5615 sub copy_source_dest
5617 return (1, undef) if (&is_readonly_mode());
5618 my ($src, $dst) = @_;
5621 &webmin_debug_log('COPY', "src=$src dst=$dst")
5622 if ($gconfig{'debug_what_ops'});
5623 if ($gconfig{'os_type'} eq 'windows') {
5624 # No tar or cp on windows, so need to use copy command
5628 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5631 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5639 # A directory .. need to copy with tar command
5640 my @st = stat($src);
5643 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5644 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5651 # Can just copy with cp
5652 my $out = &backquote_logged("cp -p ".quotemeta($src).
5653 " ".quotemeta($dst)." 2>&1");
5659 return wantarray ? ($ok, $err) : $ok;
5662 =head2 remote_session_name(host|&server)
5664 Generates a session ID for some server. For this server, this will always
5665 be an empty string. For a server object it will include the hostname and
5666 port and PID. For a server name, it will include the hostname and PID. For
5670 sub remote_session_name
5672 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5673 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5674 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5675 ref($_[0]) ? "" : "$_[0].$$";
5678 =head2 remote_foreign_require(server, module, file)
5680 Connects to rpc.cgi on a remote webmin server and have it open a session
5681 to a process that will actually do the require and run functions. This is the
5682 equivalent for foreign_require, but for a remote Webmin system. The server
5683 parameter can either be a hostname of a system registered in the Webmin
5684 Servers Index module, or a hash reference for a system from that module.
5687 sub remote_foreign_require
5689 my $call = { 'action' => 'require',
5692 my $sn = &remote_session_name($_[0]);
5693 if ($remote_session{$sn}) {
5694 $call->{'session'} = $remote_session{$sn};
5697 $call->{'newsession'} = 1;
5699 my $rv = &remote_rpc_call($_[0], $call);
5700 if ($rv->{'session'}) {
5701 $remote_session{$sn} = $rv->{'session'};
5702 $remote_session_server{$sn} = $_[0];
5706 =head2 remote_foreign_call(server, module, function, [arg]*)
5708 Call a function on a remote server. Must have been setup first with
5709 remote_foreign_require for the same server and module. Equivalent to
5710 foreign_call, but with the extra server parameter to specify the remote
5714 sub remote_foreign_call
5716 return undef if (&is_readonly_mode());
5717 my $sn = &remote_session_name($_[0]);
5718 return &remote_rpc_call($_[0], { 'action' => 'call',
5721 'session' => $remote_session{$sn},
5722 'args' => [ @_[3 .. $#_] ] } );
5725 =head2 remote_foreign_check(server, module, [api-only])
5727 Checks if some module is installed and supported on a remote server. Equivilant
5728 to foreign_check, but for the remote Webmin system specified by the server
5732 sub remote_foreign_check
5734 return &remote_rpc_call($_[0], { 'action' => 'check',
5739 =head2 remote_foreign_config(server, module)
5741 Gets the configuration for some module from a remote server, as a hash.
5742 Equivalent to foreign_config, but for a remote system.
5745 sub remote_foreign_config
5747 return &remote_rpc_call($_[0], { 'action' => 'config',
5748 'module' => $_[1] });
5751 =head2 remote_eval(server, module, code)
5753 Evaluates some perl code in the context of a module on a remote webmin server.
5754 The server parameter must be the hostname of a remote system, module must
5755 be a module directory name, and code a string of Perl code to run. This can
5756 only be called after remote_foreign_require for the same server and module.
5761 return undef if (&is_readonly_mode());
5762 my $sn = &remote_session_name($_[0]);
5763 return &remote_rpc_call($_[0], { 'action' => 'eval',
5766 'session' => $remote_session{$sn} });
5769 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5771 Transfers some local file to another server via Webmin's RPC protocol, and
5772 returns the resulting remote filename. If the remotefile parameter is given,
5773 that is the destination filename which will be used. Otherwise a randomly
5774 selected temporary filename will be used, and returned by the function.
5779 return undef if (&is_readonly_mode());
5781 my $sn = &remote_session_name($_[0]);
5782 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5783 # Copy data over TCP connection
5784 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5786 'name' => $_[3] } );
5788 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5789 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5790 return &$main::remote_error_handler("Failed to transfer file : $error")
5793 while(read(FILE, $got, 1024) > 0) {
5797 shutdown(TWRITE, 1);
5799 if ($error && $error !~ /^OK/) {
5800 # Got back an error!
5801 return &$main::remote_error_handler("Failed to transfer file : $error");
5807 # Just pass file contents as parameters
5809 while(read(FILE, $got, 1024) > 0) {
5813 return &remote_rpc_call($_[0], { 'action' => 'write',
5816 'session' => $remote_session{$sn} });
5820 =head2 remote_read(server, localfile, remotefile)
5822 Transfers a file from a remote server to this system, using Webmin's RPC
5823 protocol. The server parameter must be the hostname of a system registered
5824 in the Webmin Servers Index module, localfile is the destination path on this
5825 system, and remotefile is the file to fetch from the remote server.
5830 my $sn = &remote_session_name($_[0]);
5831 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5832 # Copy data over TCP connection
5833 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5834 'file' => $_[2] } );
5836 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5839 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5840 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5841 return &$main::remote_error_handler("Failed to transfer file : $error")
5844 open(FILE, ">$_[1]");
5845 while(read(TREAD, $got, 1024) > 0) {
5852 # Just get data as return value
5853 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5855 'session' => $remote_session{$sn} });
5856 open(FILE, ">$_[1]");
5862 =head2 remote_finished
5864 Close all remote sessions. This happens automatically after a while
5865 anyway, but this function should be called to clean things up faster.
5870 foreach my $sn (keys %remote_session) {
5871 my $server = $remote_session_server{$sn};
5872 &remote_rpc_call($server, { 'action' => 'quit',
5873 'session' => $remote_session{$sn} } );
5874 delete($remote_session{$sn});
5875 delete($remote_session_server{$sn});
5877 foreach $fh (keys %fast_fh_cache) {
5879 delete($fast_fh_cache{$fh});
5883 =head2 remote_error_setup(&function)
5885 Sets a function to be called instead of &error when a remote RPC operation
5886 fails. Useful if you want to have more control over your remote operations.
5889 sub remote_error_setup
5891 $main::remote_error_handler = $_[0] || \&error;
5894 =head2 remote_rpc_call(server, structure)
5896 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5897 and then reads back a reply structure. This is mainly for internal use only,
5898 and is called by the other remote_* functions.
5904 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5906 # Server structure was given
5908 $serv->{'user'} || $serv->{'id'} == 0 ||
5909 return &$main::remote_error_handler(
5910 "No Webmin login set for server");
5913 # lookup the server in the webmin servers module if needed
5914 if (!%main::remote_servers_cache) {
5915 &foreign_require("servers", "servers-lib.pl");
5916 foreach $s (&foreign_call("servers", "list_servers")) {
5917 $main::remote_servers_cache{$s->{'host'}} = $s;
5918 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5921 $serv = $main::remote_servers_cache{$_[0]};
5922 $serv || return &$main::remote_error_handler(
5923 "No Webmin Servers entry for $_[0]");
5924 $serv->{'user'} || return &$main::remote_error_handler(
5925 "No login set for server $_[0]");
5927 my $ip = $serv->{'ip'} || $serv->{'host'};
5929 # Work out the username and password
5931 if ($serv->{'sameuser'}) {
5932 $user = $remote_user;
5933 defined($main::remote_pass) || return &$main::remote_error_handler(
5934 "Password for this server is not available");
5935 $pass = $main::remote_pass;
5938 $user = $serv->{'user'};
5939 $pass = $serv->{'pass'};
5942 if ($serv->{'fast'} || !$sn) {
5943 # Make TCP connection call to fastrpc.cgi
5944 if (!$fast_fh_cache{$sn} && $sn) {
5945 # Need to open the connection
5946 my $con = &make_http_connection(
5947 $ip, $serv->{'port'}, $serv->{'ssl'},
5948 "POST", "/fastrpc.cgi");
5949 return &$main::remote_error_handler(
5950 "Failed to connect to $serv->{'host'} : $con")
5952 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5953 &write_http_connection($con, "User-agent: Webmin\r\n");
5954 my $auth = &encode_base64("$user:$pass");
5956 &write_http_connection($con, "Authorization: basic $auth\r\n");
5957 &write_http_connection($con, "Content-length: ",
5958 length($tostr),"\r\n");
5959 &write_http_connection($con, "\r\n");
5960 &write_http_connection($con, $tostr);
5962 # read back the response
5963 my $line = &read_http_connection($con);
5964 $line =~ tr/\r\n//d;
5965 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5966 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5968 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5969 return &$main::remote_error_handler("HTTP error : $line");
5971 $line = &read_http_connection($con);
5972 $line =~ tr/\r\n//d;
5974 $line = &read_http_connection($con);
5975 if ($line =~ /^0\s+(.*)/) {
5976 return &$main::remote_error_handler("RPC error : $1");
5978 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5979 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5980 # Started ok .. connect and save SID
5981 &close_http_connection($con);
5982 my ($port, $sid, $version, $error) = ($1, $2, $3);
5983 &open_socket($ip, $port, $sid, \$error);
5984 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5986 $fast_fh_cache{$sn} = $sid;
5987 $remote_server_version{$sn} = $version;
5990 while($stuff = &read_http_connection($con)) {
5993 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5996 elsif (!$fast_fh_cache{$sn}) {
5997 # Open the connection by running fastrpc.cgi locally
5998 pipe(RPCOUTr, RPCOUTw);
6002 open(STDOUT, ">&RPCOUTw");
6006 $ENV{'REQUEST_METHOD'} = 'GET';
6007 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
6008 $ENV{'SERVER_ROOT'} ||= $root_directory;
6010 if ($base_remote_user ne 'root' &&
6011 $base_remote_user ne 'admin') {
6012 # Need to fake up a login for the CGI!
6013 &read_acl(undef, \%acl);
6014 $ENV{'BASE_REMOTE_USER'} =
6015 $ENV{'REMOTE_USER'} =
6016 $acl{'root'} ? 'root' : 'admin';
6018 delete($ENV{'FOREIGN_MODULE_NAME'});
6019 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
6020 chdir($root_directory);
6021 if (!exec("$root_directory/fastrpc.cgi")) {
6022 print "exec failed : $!\n";
6029 ($line = <RPCOUTr>) =~ tr/\r\n//d;
6033 if ($line =~ /^0\s+(.*)/) {
6034 return &$main::remote_error_handler("RPC error : $2");
6036 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
6037 # Started ok .. connect and save SID
6039 my ($port, $sid, $error) = ($1, $2, undef);
6040 &open_socket("localhost", $port, $sid, \$error);
6041 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
6042 $fast_fh_cache{$sn} = $sid;
6049 &error("Bad response from fastrpc.cgi : $line");
6052 # Got a connection .. send off the request
6053 my $fh = $fast_fh_cache{$sn};
6054 my $tostr = &serialise_variable($_[1]);
6055 print $fh length($tostr)," $fh\n";
6057 my $rlen = int(<$fh>);
6058 my ($fromstr, $got);
6059 while(length($fromstr) < $rlen) {
6060 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
6061 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
6064 my $from = &unserialise_variable($fromstr);
6066 return &$main::remote_error_handler("Remote Webmin error");
6068 if (defined($from->{'arv'})) {
6069 return @{$from->{'arv'}};
6072 return $from->{'rv'};
6076 # Call rpc.cgi on remote server
6077 my $tostr = &serialise_variable($_[1]);
6079 my $con = &make_http_connection($ip, $serv->{'port'},
6080 $serv->{'ssl'}, "POST", "/rpc.cgi");
6081 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
6083 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
6084 &write_http_connection($con, "User-agent: Webmin\r\n");
6085 my $auth = &encode_base64("$user:$pass");
6087 &write_http_connection($con, "Authorization: basic $auth\r\n");
6088 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
6089 &write_http_connection($con, "\r\n");
6090 &write_http_connection($con, $tostr);
6092 # read back the response
6093 my $line = &read_http_connection($con);
6094 $line =~ tr/\r\n//d;
6095 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
6096 return &$main::remote_error_handler("Login to RPC server as $user rejected");
6098 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
6100 $line = &read_http_connection($con);
6101 $line =~ tr/\r\n//d;
6104 while($line = &read_http_connection($con)) {
6108 my $from = &unserialise_variable($fromstr);
6109 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
6110 if (defined($from->{'arv'})) {
6111 return @{$from->{'arv'}};
6114 return $from->{'rv'};
6119 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
6121 Executes some function in parallel on multiple servers at once. Fills in
6122 the returns and errors arrays respectively. If the module and library
6123 parameters are given, that module is remotely required on the server first,
6124 to check if it is connectable. The parameters are :
6126 =item servers - A list of Webmin system hash references.
6128 =item parallel - Number of parallel operations to perform.
6130 =item function - Reference to function to call for each system.
6132 =item args - Additional parameters to the function.
6134 =item returns - Array ref to place return values into, in same order as servers.
6136 =item errors - Array ref to place error messages into.
6138 =item module - Optional module to require on the remote system first.
6140 =item library - Optional library to require in the module.
6143 sub remote_multi_callback
6145 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
6146 &remote_error_setup(\&remote_multi_callback_error);
6148 # Call the functions
6150 foreach my $g (@$servs) {
6156 $remote_multi_callback_err = undef;
6158 # Require the remote lib
6159 &remote_foreign_require($g->{'host'}, $mod, $lib);
6160 if ($remote_multi_callback_err) {
6161 # Failed .. return error
6162 print $wh &serialise_variable(
6163 [ undef, $remote_multi_callback_err ]);
6169 my $a = ref($args) ? $args->[$p] : $args;
6170 my $rv = &$func($g, $a);
6173 print $wh &serialise_variable(
6174 [ $rv, $remote_multi_callback_err ]);
6182 # Read back the results
6184 foreach my $g (@$servs) {
6188 $errs->[$p] = "Failed to read response from $g->{'host'}";
6191 my $rv = &unserialise_variable($line);
6193 $rets->[$p] = $rv->[0];
6194 $errs->[$p] = $rv->[1];
6199 &remote_error_setup(undef);
6202 sub remote_multi_callback_error
6204 $remote_multi_callback_err = $_[0];
6207 =head2 serialise_variable(variable)
6209 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6210 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6211 called on each member to serialize the entire object.
6214 sub serialise_variable
6216 if (!defined($_[0])) {
6222 $rv = &urlize($_[0]);
6224 elsif ($r eq 'SCALAR') {
6225 $rv = &urlize(${$_[0]});
6227 elsif ($r eq 'ARRAY') {
6228 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6230 elsif ($r eq 'HASH') {
6231 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6232 &urlize(&serialise_variable($_[0]->{$_})) }
6235 elsif ($r eq 'REF') {
6236 $rv = &serialise_variable(${$_[0]});
6238 elsif ($r eq 'CODE') {
6243 # An object - treat as a hash
6244 $r = "OBJECT ".&urlize($r);
6245 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6246 &urlize(&serialise_variable($_[0]->{$_})) }
6249 return ($r ? $r : 'VAL').",".$rv;
6252 =head2 unserialise_variable(string)
6254 Converts a string created by serialise_variable() back into the original
6255 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6256 object, the same class is used on this system, if available.
6259 sub unserialise_variable
6261 my @v = split(/,/, $_[0]);
6263 if ($v[0] eq 'VAL') {
6264 @v = split(/,/, $_[0], -1);
6265 $rv = &un_urlize($v[1]);
6267 elsif ($v[0] eq 'SCALAR') {
6268 local $r = &un_urlize($v[1]);
6271 elsif ($v[0] eq 'ARRAY') {
6273 for(my $i=1; $i<@v; $i++) {
6274 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6277 elsif ($v[0] eq 'HASH') {
6279 for(my $i=1; $i<@v; $i+=2) {
6280 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6281 &unserialise_variable(&un_urlize($v[$i+1]));
6284 elsif ($v[0] eq 'REF') {
6285 local $r = &unserialise_variable($v[1]);
6288 elsif ($v[0] eq 'UNDEF') {
6291 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6292 # An object hash that we have to re-bless
6295 for(my $i=1; $i<@v; $i+=2) {
6296 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6297 &unserialise_variable(&un_urlize($v[$i+1]));
6305 =head2 other_groups(user)
6307 Returns a list of secondary groups a user is a member of, as a list of
6316 while(my @g = getgrent()) {
6317 my @m = split(/\s+/, $g[3]);
6318 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6320 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6324 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6326 Returns HTML for a button that pops up a data chooser window. The parameters
6329 =item dayfield - Name of the text field to place the day of the month into.
6331 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6333 =item yearfield - Name of the text field to place the year into.
6336 sub date_chooser_button
6338 return &theme_date_chooser_button(@_)
6339 if (defined(&theme_date_chooser_button));
6340 my ($w, $h) = (250, 225);
6341 if ($gconfig{'db_sizedate'}) {
6342 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6344 return "<input type=button onClick='window.dfield = form.$_[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";
6347 =head2 help_file(module, file)
6349 Returns the path to a module's help file of some name, typically under the
6350 help directory with a .html extension.
6355 my $mdir = &module_root_directory($_[0]);
6356 my $dir = "$mdir/help";
6357 foreach my $o (@lang_order_list) {
6358 my $lang = "$dir/$_[1].$o.html";
6359 return $lang if (-r $lang);
6361 return "$dir/$_[1].html";
6366 Seeds the random number generator, if not already done in this script. On Linux
6367 this makes use of the current time, process ID and a read from /dev/urandom.
6368 On other systems, only the current time and process ID are used.
6373 if (!$main::done_seed_random) {
6374 if (open(RANDOM, "/dev/urandom")) {
6376 read(RANDOM, $buf, 4);
6378 srand(time() ^ $$ ^ $buf);
6383 $main::done_seed_random = 1;
6387 =head2 disk_usage_kb(directory)
6389 Returns the number of kB used by some directory and all subdirs. Implemented
6390 by calling the C<du -k> command.
6395 my $dir = &translate_filename($_[0]);
6397 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6399 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6401 return $out =~ /^([0-9]+)/ ? $1 : "???";
6404 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6406 Returns the number of bytes taken up by all files in some directory and all
6407 sub-directories, by summing up their lengths. The disk_usage_kb is more
6408 reflective of reality, as the filesystem typically pads file sizes to 1k or
6412 sub recursive_disk_usage
6414 my $dir = &translate_filename($_[0]);
6421 my @st = stat($dir);
6427 my @files = readdir(DIR);
6429 foreach my $f (@files) {
6430 next if ($f eq "." || $f eq "..");
6431 next if ($skip && $f =~ /$skip/);
6432 next if ($only && $f !~ /$only/);
6433 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6439 =head2 help_search_link(term, [ section, ... ] )
6441 Returns HTML for a link to the man module for searching local and online
6442 docs for various search terms. The term parameter can either be a single
6443 word like 'bind', or a space-separated list of words. This function is typically
6444 used by modules that want to refer users to additional documentation in man
6445 pages or local system doc files.
6448 sub help_search_link
6450 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6451 my $for = &urlize(shift(@_));
6452 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6453 join("&", map { "section=$_" } @_)."&".
6454 "for=$for&exact=1&check=".&get_module_name()."'>".
6455 $text{'helpsearch'}."</a>\n";
6462 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6464 Opens a connection to some HTTP server, maybe through a proxy, and returns
6465 a handle object. The handle can then be used to send additional headers
6466 and read back a response. If anything goes wrong, returns an error string.
6467 The parameters are :
6469 =item host - Hostname or IP address of the webserver to connect to.
6471 =item port - HTTP port number to connect to.
6473 =item ssl - Set to 1 to connect in SSL mode.
6475 =item method - HTTP method, like GET or POST.
6477 =item page - Page to request on the webserver, like /foo/index.html
6479 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6482 sub make_http_connection
6484 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6487 foreach my $h (@$headers) {
6488 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6492 if (&is_readonly_mode()) {
6493 return "HTTP connections not allowed in readonly mode";
6495 my $rv = { 'fh' => time().$$ };
6498 eval "use Net::SSLeay";
6499 $@ && return $text{'link_essl'};
6500 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6501 eval "Net::SSLeay::load_error_strings()";
6502 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6503 return "Failed to create SSL context";
6504 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6505 return "Failed to create SSL connection";
6507 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6508 !&no_proxy($host)) {
6511 &open_socket($1, $2, $rv->{'fh'}, \$error);
6514 my $fh = $rv->{'fh'};
6515 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6516 if ($gconfig{'proxy_user'}) {
6517 my $auth = &encode_base64(
6518 "$gconfig{'proxy_user'}:".
6519 "$gconfig{'proxy_pass'}");
6520 $auth =~ tr/\r\n//d;
6521 print $fh "Proxy-Authorization: Basic $auth\r\n";
6525 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6526 return "Proxy error : $3" if ($2 != 200);
6529 return "Proxy error : $line";
6534 elsif (!$gconfig{'proxy_fallback'}) {
6535 # Connection to proxy failed - give up
6542 &open_socket($host, $port, $rv->{'fh'}, \$error);
6543 return $error if ($error);
6545 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6546 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6547 return "SSL connect() failed";
6548 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6549 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6552 # Plain HTTP request
6554 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6555 !&no_proxy($host)) {
6558 &open_socket($1, $2, $rv->{'fh'}, \$error);
6562 my $fh = $rv->{'fh'};
6563 my $rtxt = $method." ".
6564 "http://$host:$port$page HTTP/1.0\r\n";
6565 if ($gconfig{'proxy_user'}) {
6566 my $auth = &encode_base64(
6567 "$gconfig{'proxy_user'}:".
6568 "$gconfig{'proxy_pass'}");
6569 $auth =~ tr/\r\n//d;
6570 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6575 elsif (!$gconfig{'proxy_fallback'}) {
6580 # Connecting directly
6582 &open_socket($host, $port, $rv->{'fh'}, \$error);
6583 return $error if ($error);
6584 my $fh = $rv->{'fh'};
6585 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6592 =head2 read_http_connection(&handle, [bytes])
6594 Reads either one line or up to the specified number of bytes from the handle,
6595 originally supplied by make_http_connection.
6598 sub read_http_connection
6602 if ($h->{'ssl_con'}) {
6605 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6606 # need to read more..
6607 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6609 $rv = $h->{'buffer'};
6610 delete($h->{'buffer'});
6613 $h->{'buffer'} .= $more;
6615 $rv = substr($h->{'buffer'}, 0, $idx+1);
6616 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6619 if (length($h->{'buffer'})) {
6620 $rv = $h->{'buffer'};
6621 delete($h->{'buffer'});
6624 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6630 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6633 my $fh = $h->{'fh'};
6637 $rv = undef if ($rv eq "");
6641 =head2 write_http_connection(&handle, [data+])
6643 Writes the given data to the given HTTP connection handle.
6646 sub write_http_connection
6649 my $fh = $h->{'fh'};
6651 if ($h->{'ssl_ctx'}) {
6652 foreach my $s (@_) {
6653 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6654 $allok = 0 if (!$ok);
6658 my $ok = (print $fh @_);
6659 $allok = 0 if (!$ok);
6664 =head2 close_http_connection(&handle)
6666 Closes a connection to an HTTP server, identified by the given handle.
6669 sub close_http_connection
6675 =head2 clean_environment
6677 Deletes any environment variables inherited from miniserv so that they
6678 won't be passed to programs started by webmin. This is useful when calling
6679 programs that check for CGI-related environment variables and modify their
6680 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6683 sub clean_environment
6685 %UNCLEAN_ENV = %ENV;
6686 foreach my $k (keys %ENV) {
6687 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6691 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6692 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6693 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6694 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6695 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6696 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6697 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6698 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6704 =head2 reset_environment
6706 Puts the environment back how it was before clean_environment was callled.
6709 sub reset_environment
6712 foreach my $k (keys %UNCLEAN_ENV) {
6713 $ENV{$k} = $UNCLEAN_ENV{$k};
6715 undef(%UNCLEAN_ENV);
6719 =head2 progress_callback
6721 Never called directly, but useful for passing to &http_download to print
6722 out progress of an HTTP request.
6725 sub progress_callback
6727 if (defined(&theme_progress_callback)) {
6728 # Call the theme override
6729 return &theme_progress_callback(@_);
6733 print $progress_callback_prefix;
6735 $progress_size = $_[1];
6736 $progress_step = int($_[1] / 10);
6737 print &text('progress_size2', $progress_callback_url,
6738 &nice_size($progress_size)),"<br>\n";
6741 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6743 $last_progress_time = $last_progress_size = undef;
6745 elsif ($_[0] == 3) {
6747 my $sp = $progress_callback_prefix.(" " x 5);
6748 if ($progress_size) {
6749 # And we have a size to compare against
6750 my $st = int(($_[1] * 10) / $progress_size);
6751 my $time_now = time();
6752 if ($st != $progress_step ||
6753 $time_now - $last_progress_time > 60) {
6754 # Show progress every 10% or 60 seconds
6755 print $sp,&text('progress_datan', &nice_size($_[1]),
6756 int($_[1]*100/$progress_size)),"<br>\n";
6757 $last_progress_time = $time_now;
6759 $progress_step = $st;
6762 # No total size .. so only show in 100k jumps
6763 if ($_[1] > $last_progress_size+100*1024) {
6764 print $sp,&text('progress_data2n',
6765 &nice_size($_[1])),"<br>\n";
6766 $last_progress_size = $_[1];
6770 elsif ($_[0] == 4) {
6771 # All done downloading
6772 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6774 elsif ($_[0] == 5) {
6775 # Got new location after redirect
6776 $progress_callback_url = $_[1];
6778 elsif ($_[0] == 6) {
6780 $progress_callback_url = $_[1];
6781 print &text('progress_incache', $progress_callback_url),"<br>\n";
6785 =head2 switch_to_remote_user
6787 Changes the user and group of the current process to that of the unix user
6788 with the same name as the current webmin login, or fails if there is none.
6789 This should be called by Usermin module scripts that only need to run with
6790 limited permissions.
6793 sub switch_to_remote_user
6795 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6797 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6798 &create_missing_homedir(\@remote_user_info);
6800 &switch_to_unix_user(\@remote_user_info);
6801 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6802 $ENV{'HOME'} = $remote_user_info[7];
6804 # Export global variables to caller
6805 if ($main::export_to_caller) {
6806 my ($callpkg) = caller();
6807 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6811 =head2 switch_to_unix_user(&user-details)
6813 Switches the current process to the UID and group ID from the given list
6814 of user details, which must be in the format returned by getpwnam.
6817 sub switch_to_unix_user
6820 if (!defined($uinfo->[0])) {
6821 # No username given, so just use given GID
6822 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6825 # Use all groups from user
6826 ($(, $)) = ( $uinfo->[3],
6827 "$uinfo->[3] ".join(" ", $uinfo->[3],
6828 &other_groups($uinfo->[0])) );
6831 POSIX::setuid($uinfo->[2]);
6833 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6834 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6838 =head2 eval_as_unix_user(username, &code)
6840 Runs some code fragment with the effective UID and GID switch to that
6841 of the given Unix user, so that file IO takes place with his permissions.
6845 sub eval_as_unix_user
6847 my ($user, $code) = @_;
6848 my @uinfo = getpwnam($user);
6849 if (!scalar(@uinfo)) {
6850 &error("eval_as_unix_user called with invalid user $user");
6852 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6856 local $main::error_must_die = 1;
6863 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6866 return wantarray ? @rv : $rv[0];
6869 =head2 create_user_config_dirs
6871 Creates per-user config directories and sets $user_config_directory and
6872 $user_module_config_directory to them. Also reads per-user module configs
6873 into %userconfig. This should be called by Usermin module scripts that need
6874 to store per-user preferences or other settings.
6877 sub create_user_config_dirs
6879 return if (!$gconfig{'userconfig'});
6880 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6881 return if (!@uinfo || !$uinfo[7]);
6882 &create_missing_homedir(\@uinfo);
6883 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6884 if (!-d $user_config_directory) {
6885 mkdir($user_config_directory, 0700) ||
6886 &error("Failed to create $user_config_directory : $!");
6887 if ($< == 0 && $uinfo[2]) {
6888 chown($uinfo[2], $uinfo[3], $user_config_directory);
6891 if (&get_module_name()) {
6892 $user_module_config_directory = $user_config_directory."/".
6894 if (!-d $user_module_config_directory) {
6895 mkdir($user_module_config_directory, 0700) ||
6896 &error("Failed to create $user_module_config_directory : $!");
6897 if ($< == 0 && $uinfo[2]) {
6898 chown($uinfo[2], $uinfo[3], $user_config_directory);
6902 &read_file_cached("$module_root_directory/defaultuconfig",
6904 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6905 &read_file_cached("$user_module_config_directory/config",
6909 # Export global variables to caller
6910 if ($main::export_to_caller) {
6911 my ($callpkg) = caller();
6912 foreach my $v ('$user_config_directory',
6913 '$user_module_config_directory', '%userconfig') {
6914 my ($vt, $vn) = split('', $v, 2);
6915 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6920 =head2 create_missing_homedir(&uinfo)
6922 If auto homedir creation is enabled, create one for this user if needed.
6923 For internal use only.
6926 sub create_missing_homedir
6929 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6930 # Use has no home dir .. make one
6931 system("mkdir -p ".quotemeta($uinfo->[7]));
6932 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6933 if ($gconfig{'create_homedir_perms'} ne '') {
6934 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6939 =head2 filter_javascript(text)
6941 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6942 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6945 sub filter_javascript
6948 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6949 $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;
6950 $rv =~ s/(javascript:)/x$1/gi;
6951 $rv =~ s/(vbscript:)/x$1/gi;
6955 =head2 resolve_links(path)
6957 Given a path that may contain symbolic links, returns the real path.
6963 $path =~ s/\/+/\//g;
6964 $path =~ s/\/$// if ($path ne "/");
6965 my @p = split(/\/+/, $path);
6967 for(my $i=0; $i<@p; $i++) {
6968 my $sofar = "/".join("/", @p[0..$i]);
6969 my $lnk = readlink($sofar);
6970 if ($lnk eq $sofar) {
6971 # Link to itself! Cannot do anything more really ..
6974 elsif ($lnk =~ /^\//) {
6975 # Link is absolute..
6976 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6980 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6986 =head2 simplify_path(path, bogus)
6988 Given a path, maybe containing elements ".." and "." , convert it to a
6989 clean, absolute form. Returns undef if this is not possible.
6997 my @bits = split(/\/+/, $dir);
7000 foreach my $b (@bits) {
7004 elsif ($b eq "..") {
7006 if (scalar(@fixedbits) == 0) {
7007 # Cannot! Already at root!
7014 push(@fixedbits, $b);
7017 return "/".join('/', @fixedbits);
7020 =head2 same_file(file1, file2)
7022 Returns 1 if two files are actually the same
7027 return 1 if ($_[0] eq $_[1]);
7028 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
7029 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
7030 : (@{$stat_cache{$_[0]}} = stat($_[0]));
7031 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
7032 : (@{$stat_cache{$_[1]}} = stat($_[1]));
7033 return 0 if (!@stat1 || !@stat2);
7034 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
7037 =head2 flush_webmin_caches
7039 Clears all in-memory and on-disk caches used by Webmin.
7042 sub flush_webmin_caches
7044 undef(%main::read_file_cache);
7045 undef(%main::acl_hash_cache);
7046 undef(%main::acl_array_cache);
7047 undef(%main::has_command_cache);
7048 undef(@main::list_languages_cache);
7049 undef($main::got_list_usermods_cache);
7050 undef(@main::list_usermods_cache);
7051 undef(%main::foreign_installed_cache);
7052 unlink("$config_directory/module.infos.cache");
7053 &get_all_module_infos();
7056 =head2 list_usermods
7058 Returns a list of additional module restrictions. For internal use in
7064 if (!$main::got_list_usermods_cache) {
7065 @main::list_usermods_cache = ( );
7067 open(USERMODS, "$config_directory/usermin.mods");
7069 if (/^([^:]+):(\+|-|):(.*)/) {
7070 push(@main::list_usermods_cache,
7071 [ $1, $2, [ split(/\s+/, $3) ] ]);
7075 $main::got_list_usermods_cache = 1;
7077 return @main::list_usermods_cache;
7080 =head2 available_usermods(&allmods, &usermods)
7082 Returns a list of modules that are available to the given user, based
7083 on usermod additional/subtractions. For internal use by Usermin only.
7086 sub available_usermods
7088 return @{$_[0]} if (!@{$_[1]});
7090 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
7091 my @uinfo = @remote_user_info;
7092 @uinfo = getpwnam($remote_user) if (!@uinfo);
7093 foreach my $u (@{$_[1]}) {
7095 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
7098 elsif ($u->[0] =~ /^\@(.*)$/) {
7099 # Check for group membership
7100 my @ginfo = getgrnam($1);
7101 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7102 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
7104 elsif ($u->[0] =~ /^\//) {
7105 # Check users and groups in file
7107 open(USERFILE, $u->[0]);
7110 if ($_ eq $remote_user) {
7113 elsif (/^\@(.*)$/) {
7114 my @ginfo = getgrnam($1);
7116 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
7117 &indexof($remote_user,
7118 split(/\s+/, $ginfo[3])) >= 0));
7125 if ($u->[1] eq "+") {
7126 map { $mods{$_}++ } @{$u->[2]};
7128 elsif ($u->[1] eq "-") {
7129 map { delete($mods{$_}) } @{$u->[2]};
7133 map { $mods{$_}++ } @{$u->[2]};
7137 return grep { $mods{$_->{'dir'}} } @{$_[0]};
7140 =head2 get_available_module_infos(nocache)
7142 Returns a list of modules available to the current user, based on
7143 operating system support, access control and usermod restrictions. Useful
7144 in themes that need to display a list of modules the user can use.
7145 Each element of the returned array is a hash reference in the same format as
7146 returned by get_module_info.
7149 sub get_available_module_infos
7152 &read_acl(\%acl, \%uacl);
7153 my $risk = $gconfig{'risk_'.$base_remote_user};
7155 foreach my $minfo (&get_all_module_infos($_[0])) {
7156 next if (!&check_os_support($minfo));
7158 # Check module risk level
7159 next if ($risk ne 'high' && $minfo->{'risk'} &&
7160 $minfo->{'risk'} !~ /$risk/);
7164 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
7165 !$acl{$base_remote_user,"*"});
7167 next if (&is_readonly_mode() && !$minfo->{'readonly'});
7171 # Check usermod restrictions
7172 my @usermods = &list_usermods();
7173 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
7174 &available_usermods(\@rv, \@usermods);
7176 # Check RBAC restrictions
7178 foreach my $m (@rv) {
7179 if (&supports_rbac($m->{'dir'}) &&
7180 &use_rbac_module_acl(undef, $m->{'dir'})) {
7181 local $rbacs = &get_rbac_module_acl($remote_user,
7189 # Module or system doesn't support RBAC
7190 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7196 if (defined(&theme_foreign_available)) {
7197 foreach my $m (@rbacrv) {
7198 if (&theme_foreign_available($m->{'dir'})) {
7207 # Check licence module vetos
7209 if ($main::licence_module) {
7210 foreach my $m (@themerv) {
7211 if (&foreign_call($main::licence_module,
7212 "check_module_licence", $m->{'dir'})) {
7224 =head2 get_visible_module_infos(nocache)
7226 Like get_available_module_infos, but excludes hidden modules from the list.
7227 Each element of the returned array is a hash reference in the same format as
7228 returned by get_module_info.
7231 sub get_visible_module_infos
7234 my $pn = &get_product_name();
7235 return grep { !$_->{'hidden'} &&
7236 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7239 =head2 get_visible_modules_categories(nocache)
7241 Returns a list of Webmin module categories, each of which is a hash ref
7242 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7243 of modules in the category, in the format returned by get_module_info.
7244 Un-used modules are automatically assigned to the 'unused' category, and
7245 those with no category are put into 'others'.
7248 sub get_visible_modules_categories
7251 my @mods = &get_visible_module_infos($nocache);
7253 if (&get_product_name() eq 'webmin') {
7254 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7255 @mods = grep { $_->{'installed'} ne '0' } @mods;
7257 my %cats = &list_categories(\@mods);
7259 foreach my $c (keys %cats) {
7260 my $cat = { 'code' => $c || 'other',
7261 'desc' => $cats{$c} };
7262 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7265 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7266 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7268 # Add un-installed modules in magic category
7269 my $cat = { 'code' => 'unused',
7270 'desc' => $text{'main_unused'},
7272 'modules' => \@unmods };
7278 =head2 is_under_directory(directory, file)
7280 Returns 1 if the given file is under the specified directory, 0 if not.
7281 Symlinks are taken into account in the file to find it's 'real' location.
7284 sub is_under_directory
7286 my ($dir, $file) = @_;
7287 return 1 if ($dir eq "/");
7288 return 0 if ($file =~ /\.\./);
7289 my $ld = &resolve_links($dir);
7291 return &is_under_directory($ld, $file);
7293 my $lp = &resolve_links($file);
7295 return &is_under_directory($dir, $lp);
7297 return 0 if (length($file) < length($dir));
7298 return 1 if ($dir eq $file);
7300 return substr($file, 0, length($dir)) eq $dir;
7303 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7305 Given an absolute URL, returns the host, port, page and ssl flag components.
7306 Relative URLs can also be parsed, if the base information is provided.
7311 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7313 my $ssl = $1 eq 'https';
7314 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
7320 elsif ($_[0] =~ /^\/\S*$/) {
7321 # A relative to the server URL
7322 return ($_[1], $_[2], $_[0], $_[4]);
7325 # A relative to the directory URL
7327 $page =~ s/[^\/]+$//;
7328 return ($_[1], $_[2], $page.$_[0], $_[4]);
7332 =head2 check_clicks_function
7334 Returns HTML for a JavaScript function called check_clicks that returns
7335 true when first called, but false subsequently. Useful on onClick for
7336 critical buttons. Deprecated, as this method of preventing duplicate actions
7340 sub check_clicks_function
7345 function check_clicks(form)
7352 for(i=0; i<form.length; i++)
7353 form.elements[i].disabled = true;
7362 =head2 load_entities_map
7364 Returns a hash ref containing mappings between HTML entities (like ouml) and
7365 ascii values (like 246). Mainly for internal use.
7368 sub load_entities_map
7370 if (!%entities_map_cache) {
7372 open(EMAP, "$root_directory/entities_map.txt");
7374 if (/^(\d+)\s+(\S+)/) {
7375 $entities_map_cache{$2} = $1;
7380 return \%entities_map_cache;
7383 =head2 entities_to_ascii(string)
7385 Given a string containing HTML entities like ö and 7, replace them
7386 with their ASCII equivalents.
7389 sub entities_to_ascii
7392 my $emap = &load_entities_map();
7393 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7394 $str =~ s/&#(\d+);/chr($1)/ge;
7398 =head2 get_product_name
7400 Returns either 'webmin' or 'usermin', depending on which program the current
7401 module is in. Useful for modules that can be installed into either.
7404 sub get_product_name
7406 return $gconfig{'product'} if (defined($gconfig{'product'}));
7407 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7412 Returns the character set for the current language, such as iso-8859-1.
7417 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7418 $current_lang_info->{'charset'} ?
7419 $current_lang_info->{'charset'} : $default_charset;
7423 =head2 get_display_hostname
7425 Returns the system's hostname for UI display purposes. This may be different
7426 from the actual hostname if you administrator has configured it so in the
7427 Webmin Configuration module.
7430 sub get_display_hostname
7432 if ($gconfig{'hostnamemode'} == 0) {
7433 return &get_system_hostname();
7435 elsif ($gconfig{'hostnamemode'} == 3) {
7436 return $gconfig{'hostnamedisplay'};
7439 my $h = $ENV{'HTTP_HOST'};
7441 if ($gconfig{'hostnamemode'} == 2) {
7442 $h =~ s/^(www|ftp|mail)\.//i;
7448 =head2 save_module_config([&config], [modulename])
7450 Saves the configuration for some module. The config parameter is an optional
7451 hash reference of names and values to save, which defaults to the global
7452 %config hash. The modulename parameter is the module to update the config
7453 file, which defaults to the current module.
7456 sub save_module_config
7458 my $c = $_[0] || { &get_module_variable('%config') };
7459 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7460 &write_file("$config_directory/$m/config", $c);
7463 =head2 save_user_module_config([&config], [modulename])
7465 Saves the user's Usermin preferences for some module. The config parameter is
7466 an optional hash reference of names and values to save, which defaults to the
7467 global %userconfig hash. The modulename parameter is the module to update the
7468 config file, which defaults to the current module.
7471 sub save_user_module_config
7473 my $c = $_[0] || { &get_module_variable('%userconfig') };
7474 my $m = $_[1] || &get_module_name();
7475 my $ucd = $user_config_directory;
7477 my @uinfo = @remote_user_info ? @remote_user_info
7478 : getpwnam($remote_user);
7479 return if (!@uinfo || !$uinfo[7]);
7480 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7482 &write_file("$ucd/$m/config", $c);
7485 =head2 nice_size(bytes, [min])
7487 Converts a number of bytes into a number followed by a suffix like GB, MB
7488 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7489 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7494 my ($units, $uname);
7495 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7496 $units = 1024*1024*1024*1024;
7499 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7500 $units = 1024*1024*1024;
7503 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7507 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7515 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7517 return $sz." ".$uname;
7520 =head2 get_perl_path
7522 Returns the path to Perl currently in use, such as /usr/bin/perl.
7527 if (open(PERL, "$config_directory/perl-path")) {
7533 return $^X if (-x $^X);
7534 return &has_command("perl");
7537 =head2 get_goto_module([&mods])
7539 Returns the details of a module that the current user should be re-directed
7540 to after logging in, or undef if none. Useful for themes.
7545 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7546 if ($gconfig{'gotomodule'}) {
7547 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7548 return $goto if ($goto);
7550 if (@mods == 1 && $gconfig{'gotoone'}) {
7556 =head2 select_all_link(field, form, [text])
7558 Returns HTML for a 'Select all' link that uses Javascript to select
7559 multiple checkboxes with the same name. The parameters are :
7561 =item field - Name of the checkbox inputs.
7563 =item form - Index of the form on the page.
7565 =item text - Message for the link, defaulting to 'Select all'.
7570 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7571 my ($field, $form, $text) = @_;
7573 $text ||= $text{'ui_selall'};
7574 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7577 =head2 select_invert_link(field, form, text)
7579 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7580 selection on multiple checkboxes with the same name. The parameters are :
7582 =item field - Name of the checkbox inputs.
7584 =item form - Index of the form on the page.
7586 =item text - Message for the link, defaulting to 'Invert selection'.
7589 sub select_invert_link
7591 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7592 my ($field, $form, $text) = @_;
7594 $text ||= $text{'ui_selinv'};
7595 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7598 =head2 select_rows_link(field, form, text, &rows)
7600 Returns HTML for a link that uses Javascript to select rows with particular
7601 values for their checkboxes. The parameters are :
7603 =item field - Name of the checkbox inputs.
7605 =item form - Index of the form on the page.
7607 =item text - Message for the link, de
7609 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7612 sub select_rows_link
7614 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7615 my ($field, $form, $text, $rows) = @_;
7617 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7618 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7619 $js .= "return false;";
7620 return "<a href='#' onClick='$js'>$text</a>";
7623 =head2 check_pid_file(file)
7625 Given a pid file, returns the PID it contains if the process is running.
7630 open(PIDFILE, $_[0]) || return undef;
7631 my $pid = <PIDFILE>;
7633 $pid =~ /^\s*(\d+)/ || return undef;
7634 kill(0, $1) || return undef;
7640 Return the local os-specific library name to this module. For internal use only.
7645 my $mn = &get_module_name();
7646 my $md = &module_root_directory($mn);
7647 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7648 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7650 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7651 return "$mn-$gconfig{'os_type'}-lib.pl";
7653 elsif (-r "$md/$mn-generic-lib.pl") {
7654 return "$mn-generic-lib.pl";
7661 =head2 module_root_directory(module)
7663 Given a module name, returns its root directory. On a typical Webmin install,
7664 all modules are under the same directory - but it is theoretically possible to
7668 sub module_root_directory
7670 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7671 if (@root_directories > 1) {
7672 foreach my $r (@root_directories) {
7678 return "$root_directories[0]/$d";
7681 =head2 list_mime_types
7683 Returns a list of all known MIME types and their extensions, as a list of hash
7684 references with keys :
7686 =item type - The MIME type, like text/plain.
7688 =item exts - A list of extensions, like .doc and .avi.
7690 =item desc - A human-readable description for the MIME type.
7695 if (!@list_mime_types_cache) {
7697 open(MIME, "$root_directory/mime.types");
7701 if (s/#\s*(.*)$//g) {
7704 my ($type, @exts) = split(/\s+/);
7706 push(@list_mime_types_cache, { 'type' => $type,
7713 return @list_mime_types_cache;
7716 =head2 guess_mime_type(filename, [default])
7718 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7719 The optional default parameter sets a default type of use if none is found,
7720 which defaults to application/octet-stream.
7725 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7727 foreach my $t (&list_mime_types()) {
7728 foreach my $e (@{$t->{'exts'}}) {
7729 return $t->{'type'} if (lc($e) eq lc($ext));
7733 return @_ > 1 ? $_[1] : "application/octet-stream";
7736 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7738 Opens a file handle for writing to a temporary file, which will only be
7739 renamed over the real file when the handle is closed. This allows critical
7740 files like /etc/shadow to be updated safely, even if writing fails part way
7741 through due to lack of disk space. The parameters are :
7743 =item handle - File handle to open, as you would use in Perl's open function.
7745 =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.
7747 =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 $! with the error code.
7749 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7751 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7757 # Just getting a temp file
7758 if (!defined($main::open_tempfiles{$_[0]})) {
7759 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7760 my $dir = $1 || "/";
7761 my $tmp = "$dir/$2.webmintmp.$$";
7762 $main::open_tempfiles{$_[0]} = $tmp;
7763 push(@main::temporary_files, $tmp);
7765 return $main::open_tempfiles{$_[0]};
7769 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7770 $fh = &callers_package($fh);
7772 my %gaccess = &get_module_acl(undef, "");
7773 my $db = $gconfig{'debug_what_write'};
7774 if ($file =~ /\r|\n|\0/) {
7775 if ($noerror) { return 0; }
7776 else { &error("Filename contains invalid characters"); }
7778 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7779 # Read-only mode .. veto all writes
7780 print STDERR "vetoing write to $file\n";
7781 return open($fh, ">$null_file");
7783 elsif ($file =~ /^(>|>>|)nul$/i) {
7784 # Write to Windows null device
7785 &webmin_debug_log($1 eq ">" ? "WRITE" :
7786 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7788 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7789 # Writes to /dev/null or TTYs don't need to be handled
7790 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7791 return open($fh, $file);
7793 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7794 &webmin_debug_log("WRITE", $1) if ($db);
7795 # Over-writing a file, via a temp file
7797 $file = &translate_filename($file);
7799 # Open the link target instead
7800 $file = &resolve_links($file);
7803 # Cannot open a directory!
7804 if ($noerror) { return 0; }
7805 else { &error("Cannot write to directory $file"); }
7807 my $tmp = &open_tempfile($file);
7808 my $ex = open($fh, ">$tmp");
7809 if (!$ex && $! =~ /permission/i) {
7810 # Could not open temp file .. try opening actual file
7812 $ex = open($fh, ">$file");
7813 delete($main::open_tempfiles{$file});
7816 $main::open_temphandles{$fh} = $file;
7819 if (!$ex && !$noerror) {
7820 &error(&text("efileopen", $file, $!));
7824 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7825 # Just writing direct to a file
7826 &webmin_debug_log("WRITE", $1) if ($db);
7828 $file = &translate_filename($file);
7829 my @old_attributes = &get_clear_file_attributes($file);
7830 my $ex = open($fh, ">$file");
7831 &reset_file_attributes($file, \@old_attributes);
7832 $main::open_temphandles{$fh} = $file;
7833 if (!$ex && !$noerror) {
7834 &error(&text("efileopen", $file, $!));
7839 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7840 # Appending to a file .. nothing special to do
7841 &webmin_debug_log("APPEND", $1) if ($db);
7843 $file = &translate_filename($file);
7844 my @old_attributes = &get_clear_file_attributes($file);
7845 my $ex = open($fh, ">>$file");
7846 &reset_file_attributes($file, \@old_attributes);
7847 $main::open_temphandles{$fh} = $file;
7848 if (!$ex && !$noerror) {
7849 &error(&text("efileopen", $file, $!));
7854 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7855 # Read mode .. nothing to do here
7856 &webmin_debug_log("READ", $file) if ($db);
7857 $file = &translate_filename($file);
7858 return open($fh, $file);
7860 elsif ($file eq ">" || $file eq ">>") {
7861 my ($package, $filename, $line) = caller;
7862 if ($noerror) { return 0; }
7863 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7866 my ($package, $filename, $line) = caller;
7867 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7872 =head2 close_tempfile(file|handle)
7874 Copies a temp file to the actual file, assuming that all writes were
7875 successful. The handle must have been one passed to open_tempfile.
7881 my $fh = &callers_package($_[0]);
7883 if (defined($file = $main::open_temphandles{$fh})) {
7885 close($fh) || &error(&text("efileclose", $file, $!));
7886 delete($main::open_temphandles{$fh});
7887 return &close_tempfile($file);
7889 elsif (defined($main::open_tempfiles{$_[0]})) {
7891 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7892 my @st = stat($_[0]);
7893 if (&is_selinux_enabled() && &has_command("chcon")) {
7894 # Set original security context
7895 system("chcon --reference=".quotemeta($_[0]).
7896 " ".quotemeta($main::open_tempfiles{$_[0]}).
7897 " >/dev/null 2>&1");
7899 my @old_attributes = &get_clear_file_attributes($_[0]);
7900 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7902 # Set original permissions and ownership
7903 chmod($st[2], $_[0]);
7904 chown($st[4], $st[5], $_[0]);
7906 &reset_file_attributes($_[0], \@old_attributes);
7907 delete($main::open_tempfiles{$_[0]});
7908 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7909 if ($main::open_templocks{$_[0]}) {
7910 &unlock_file($_[0]);
7911 delete($main::open_templocks{$_[0]});
7916 # Must be closing a handle not associated with a file
7922 =head2 print_tempfile(handle, text, ...)
7924 Like the normal print function, but calls &error on failure. Useful when
7925 combined with open_tempfile, to ensure that a criticial file is never
7926 only partially written.
7931 my ($fh, @args) = @_;
7932 $fh = &callers_package($fh);
7933 (print $fh @args) || &error(&text("efilewrite",
7934 $main::open_temphandles{$fh} || $fh, $!));
7937 =head2 is_selinux_enabled
7939 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7942 sub is_selinux_enabled
7944 if (!defined($main::selinux_enabled_cache)) {
7946 if ($gconfig{'os_type'} !~ /-linux$/) {
7947 # Not on linux, so no way
7948 $main::selinux_enabled_cache = 0;
7950 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7951 # Use global config file
7952 $main::selinux_enabled_cache =
7953 $seconfig{'SELINUX'} eq 'disabled' ||
7954 !$seconfig{'SELINUX'} ? 0 : 1;
7957 # Use selinuxenabled command
7958 #$selinux_enabled_cache =
7959 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7960 $main::selinux_enabled_cache = 0;
7963 return $main::selinux_enabled_cache;
7966 =head2 get_clear_file_attributes(file)
7968 Finds file attributes that may prevent writing, clears them and returns them
7969 as a list. May call error. Mainly for internal use by open_tempfile and
7973 sub get_clear_file_attributes
7977 if ($gconfig{'chattr'}) {
7978 # Get original immutable bit
7979 my $out = &backquote_command(
7980 "lsattr ".quotemeta($file)." 2>/dev/null");
7982 $out =~ s/\s\S+\n//;
7983 @old_attributes = grep { $_ ne '-' } split(//, $out);
7985 if (&indexof("i", @old_attributes) >= 0) {
7986 my $err = &backquote_logged(
7987 "chattr -i ".quotemeta($file)." 2>&1");
7989 &error("Failed to remove immutable bit on ".
7994 return @old_attributes;
7997 =head2 reset_file_attributes(file, &attributes)
7999 Put back cleared attributes on some file. May call error. Mainly for internal
8000 use by close_tempfile.
8003 sub reset_file_attributes
8005 my ($file, $old_attributes) = @_;
8006 if (&indexof("i", @$old_attributes) >= 0) {
8007 my $err = &backquote_logged(
8008 "chattr +i ".quotemeta($file)." 2>&1");
8010 &error("Failed to restore immutable bit on ".
8016 =head2 cleanup_tempnames
8018 Remove all temporary files generated using transname. Typically only called
8019 internally when a Webmin script exits.
8022 sub cleanup_tempnames
8024 foreach my $t (@main::temporary_files) {
8027 @main::temporary_files = ( );
8030 =head2 open_lock_tempfile([handle], file, [no-error])
8032 Returns a temporary file for writing to some actual file, and also locks it.
8033 Effectively the same as calling lock_file and open_tempfile on the same file,
8034 but calls the unlock for you automatically when it is closed.
8037 sub open_lock_tempfile
8039 my ($fh, $file, $noerror, $notemp, $safe) = @_;
8040 $fh = &callers_package($fh);
8041 my $lockfile = $file;
8042 $lockfile =~ s/^[^\/]*//;
8043 if ($lockfile =~ /^\//) {
8044 $main::open_templocks{$lockfile} = &lock_file($lockfile);
8046 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
8051 $main::end_exit_status ||= $?;
8052 if ($$ == $main::initial_process_id) {
8053 # Exiting from initial process
8054 &cleanup_tempnames();
8055 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
8056 $main::debug_log_start_module eq &get_module_name()) {
8057 my $len = time() - $main::debug_log_start_time;
8058 &webmin_debug_log("STOP", "runtime=$len");
8059 $main::debug_log_start_time = 0;
8061 if (!$ENV{'SCRIPT_NAME'} &&
8062 $main::initial_module_name eq &get_module_name()) {
8063 # In a command-line script - call the real exit, so that the
8064 # exit status gets properly propogated. In some cases this
8065 # was not happening.
8066 exit($main::end_exit_status);
8071 =head2 month_to_number(month)
8073 Converts a month name like feb to a number like 1.
8078 return $month_to_number_map{lc(substr($_[0], 0, 3))};
8081 =head2 number_to_month(number)
8083 Converts a number like 1 to a month name like Feb.
8088 return ucfirst($number_to_month_map{$_[0]});
8091 =head2 get_rbac_module_acl(user, module)
8093 Returns a hash reference of RBAC overrides ACLs for some user and module.
8094 May return undef if none exist (indicating access denied), or the string *
8095 if full access is granted.
8098 sub get_rbac_module_acl
8100 my ($user, $mod) = @_;
8101 eval "use Authen::SolarisRBAC";
8102 return undef if ($@);
8105 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
8106 # Automagic webmin.modulename.admin authorization exists .. allow access
8108 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
8109 %rv = ( 'noconfig' => 1 );
8116 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
8120 my ($auths, $acls) = split(/\s+/, $_);
8121 my @auths = split(/,/, $auths);
8123 my ($merge) = ($acls =~ s/^\+//);
8125 if ($auths eq "*") {
8126 # These ACLs apply to all RBAC users.
8127 # Only if there is some that match a specific authorization
8128 # later will they be used though.
8131 # Check each of the RBAC authorizations
8132 foreach my $a (@auths) {
8133 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
8138 $foundany++ if ($gotall);
8141 # Found an RBAC authorization - return the ACLs
8142 return "*" if ($acls eq "*");
8143 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
8145 # Just add to current set
8146 foreach my $a (keys %acl) {
8157 return !$foundany ? undef : %rv ? \%rv : undef;
8160 =head2 supports_rbac([module])
8162 Returns 1 if RBAC client support is available, such as on Solaris.
8167 return 0 if ($gconfig{'os_type'} ne 'solaris');
8168 eval "use Authen::SolarisRBAC";
8171 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
8176 =head2 use_rbac_module_acl(user, module)
8178 Returns 1 if some user should use RBAC to get permissions for a module
8181 sub use_rbac_module_acl
8183 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8184 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8185 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8186 my %access = &get_module_acl($u, $m, 1);
8187 return $access{'rbac'} ? 1 : 0;
8190 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8192 Runs some command, possibly feeding it input and capturing output to the
8193 give files or scalar references. The parameters are :
8195 =item command - Full command to run, possibly including shell meta-characters.
8197 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8199 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8201 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8203 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8205 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8210 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8211 if (&is_readonly_mode() && !$safe) {
8212 print STDERR "Vetoing command $_[0]\n";
8216 $cmd = &translate_command($cmd);
8218 # Use ` operator where possible
8219 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8220 if (!$stdin && ref($stdout) && !$stderr) {
8221 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8222 $$stdout = `$cmd 2>$null_file`;
8225 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8226 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8227 $$stdout = `$cmd 2>&1`;
8230 elsif (!$stdin && !$stdout && !$stderr) {
8231 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8232 return system("$cmd >$null_file 2>$null_file <$null_file");
8236 $| = 1; # needed on some systems to flush before forking
8237 pipe(EXECSTDINr, EXECSTDINw);
8238 pipe(EXECSTDOUTr, EXECSTDOUTw);
8239 pipe(EXECSTDERRr, EXECSTDERRw);
8241 if (!($pid = fork())) {
8245 open(STDIN, "<&EXECSTDINr");
8246 open(STDOUT, ">&EXECSTDOUTw");
8247 if (ref($stderr) && $stderr eq $stdout) {
8248 open(STDERR, ">&EXECSTDOUTw");
8251 open(STDERR, ">&EXECSTDERRw");
8258 my $fullcmd = "($cmd)";
8259 if ($stdin && !ref($stdin)) {
8260 $fullcmd .= " <$stdin";
8262 if ($stdout && !ref($stdout)) {
8263 $fullcmd .= " >$stdout";
8265 if ($stderr && !ref($stderr)) {
8266 if ($stderr eq $stdout) {
8267 $fullcmd .= " 2>&1";
8270 $fullcmd .= " 2>$stderr";
8273 if ($gconfig{'os_type'} eq 'windows') {
8277 exec("/bin/sh", "-c", $fullcmd);
8279 print "Exec failed : $!\n";
8286 # Feed input and capture output
8288 if ($stdin && ref($stdin)) {
8289 print EXECSTDINw $$stdin;
8292 if ($stdout && ref($stdout)) {
8294 while(<EXECSTDOUTr>) {
8299 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8301 while(<EXECSTDERRr>) {
8312 =head2 open_readfile(handle, file)
8314 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8315 exactly the same as Perl's open function.
8320 my ($fh, $file) = @_;
8321 $fh = &callers_package($fh);
8322 my $realfile = &translate_filename($file);
8323 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8324 return open($fh, "<".$realfile);
8327 =head2 open_execute_command(handle, command, output?, safe?)
8329 Runs some command, with the specified file handle set to either write to it if
8330 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8331 indicates if the command modifies the state of the system or not.
8334 sub open_execute_command
8336 my ($fh, $cmd, $mode, $safe) = @_;
8337 $fh = &callers_package($fh);
8338 my $realcmd = &translate_command($cmd);
8339 if (&is_readonly_mode() && !$safe) {
8340 # Don't actually run it
8341 print STDERR "vetoing command $cmd\n";
8344 return open($fh, ">$null_file");
8347 return open($fh, $null_file);
8351 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8352 if ($gconfig{'debug_what_cmd'});
8354 return open($fh, "| $cmd");
8356 elsif ($mode == 1) {
8357 return open($fh, "$cmd 2>$null_file |");
8359 elsif ($mode == 2) {
8360 return open($fh, "$cmd 2>&1 |");
8364 =head2 translate_filename(filename)
8366 Applies all relevant registered translation functions to a filename. Mostly
8367 for internal use, and typically does nothing.
8370 sub translate_filename
8372 my ($realfile) = @_;
8373 my @funcs = grep { $_->[0] eq &get_module_name() ||
8374 !defined($_->[0]) } @main::filename_callbacks;
8375 foreach my $f (@funcs) {
8377 $realfile = &$func($realfile, @{$f->[2]});
8382 =head2 translate_command(filename)
8384 Applies all relevant registered translation functions to a command. Mostly
8385 for internal use, and typically does nothing.
8388 sub translate_command
8391 my @funcs = grep { $_->[0] eq &get_module_name() ||
8392 !defined($_->[0]) } @main::command_callbacks;
8393 foreach my $f (@funcs) {
8395 $realcmd = &$func($realcmd, @{$f->[2]});
8400 =head2 register_filename_callback(module|undef, &function, &args)
8402 Registers some function to be called when the specified module (or all
8403 modules) tries to open a file for reading and writing. The function must
8404 return the actual file to open. This allows you to override which files
8405 other code actually operates on, via the translate_filename function.
8408 sub register_filename_callback
8410 my ($mod, $func, $args) = @_;
8411 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8414 =head2 register_command_callback(module|undef, &function, &args)
8416 Registers some function to be called when the specified module (or all
8417 modules) tries to execute a command. The function must return the actual
8418 command to run. This allows you to override which commands other other code
8419 actually runs, via the translate_command function.
8422 sub register_command_callback
8424 my ($mod, $func, $args) = @_;
8425 push(@main::command_callbacks, [ $mod, $func, $args ]);
8428 =head2 capture_function_output(&function, arg, ...)
8430 Captures output that some function prints to STDOUT, and returns it. Useful
8431 for functions outside your control that print data when you really want to
8432 manipulate it before output.
8435 sub capture_function_output
8437 my ($func, @args) = @_;
8438 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8439 my $old = select(SOCKET1);
8440 my @rv = &$func(@args);
8449 return wantarray ? ($out, \@rv) : $out;
8452 =head2 capture_function_output_tempfile(&function, arg, ...)
8454 Behaves the same as capture_function_output, but uses a temporary file
8455 to avoid buffer full problems.
8458 sub capture_function_output_tempfile
8460 my ($func, @args) = @_;
8461 my $temp = &transname();
8462 open(BUFFER, ">$temp");
8463 my $old = select(BUFFER);
8464 my @rv = &$func(@args);
8467 my $out = &read_file_contents($temp);
8468 &unlink_file($temp);
8469 return wantarray ? ($out, \@rv) : $out;
8472 =head2 modules_chooser_button(field, multiple, [form])
8474 Returns HTML for a button for selecting one or many Webmin modules.
8475 field - Name of the HTML field to place the module names into.
8476 multiple - Set to 1 if multiple modules can be selected.
8477 form - Index of the form on the page.
8480 sub modules_chooser_button
8482 return &theme_modules_chooser_button(@_)
8483 if (defined(&theme_modules_chooser_button));
8484 my $form = defined($_[2]) ? $_[2] : 0;
8485 my $w = $_[1] ? 700 : 500;
8487 if ($_[1] && $gconfig{'db_sizemodules'}) {
8488 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8490 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8491 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8493 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";
8496 =head2 substitute_template(text, &hash)
8498 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8499 the text replaces it with the value of the hash key foo. Also supports blocks
8500 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8501 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8504 sub substitute_template
8506 # Add some extra fixed parameters to the hash
8507 my %hash = %{$_[1]};
8508 $hash{'hostname'} = &get_system_hostname();
8509 $hash{'webmin_config'} = $config_directory;
8510 $hash{'webmin_etc'} = $config_directory;
8511 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8512 $hash{'webmin_var'} = $var_directory;
8514 # Add time-based parameters, for use in DNS
8515 $hash{'current_time'} = time();
8516 my @tm = localtime($hash{'current_time'});
8517 $hash{'current_year'} = $tm[5]+1900;
8518 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8519 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8520 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8521 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8522 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8524 # Actually do the substition
8526 foreach my $s (keys %hash) {
8527 next if ($s eq ''); # Prevent just $ from being subbed
8530 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8531 $rv =~ s/\$\Q$us\E/$sv/g;
8533 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8534 # and ${IF}..${ENDIF} with value
8535 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8536 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8538 # Replace $IF..$ELSE..$ENDIF block with first value,
8539 # and $IF..$ENDIF with value
8540 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8541 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8543 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8544 # matching, nothing if not
8545 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8546 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8548 # Replace $IFEQ..$ENDIFEQ block with first value if
8549 # matching, nothing if not
8550 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8551 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8554 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8555 # and ${IF}..${ENDIF} with nothing
8556 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8557 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8559 # Replace $IF..$ELSE..$ENDIF block with second value,
8560 # and $IF..$ENDIF with nothing
8561 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8562 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8564 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8565 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8566 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8570 # Now assume any $IF blocks whose variables are not present in the hash
8571 # evaluate to false.
8572 # $IF...$ELSE x $ENDIF => x
8573 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8574 # $IF...x...$ENDIF => (nothing)
8575 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8576 # ${var} => (nothing)
8577 $rv =~ s/\$\{[A-Z]+\}//g;
8582 =head2 running_in_zone
8584 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8585 disable module and features that are not appropriate, like those that modify
8586 mounted filesystems.
8591 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8592 $gconfig{'os_version'} < 10);
8593 my $zn = `zonename 2>$null_file`;
8595 return $zn && $zn ne "global";
8598 =head2 running_in_vserver
8600 Returns 1 if the current Webmin instance is running in a Linux VServer.
8601 Used to disable modules and features that are not appropriate.
8604 sub running_in_vserver
8606 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8609 open(MTAB, "/etc/mtab");
8611 my ($dev, $mp) = split(/\s+/, $_);
8612 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8621 =head2 running_in_xen
8623 Returns 1 if Webmin is running inside a Xen instance, by looking
8624 at /proc/xen/capabilities.
8629 return 0 if (!-r "/proc/xen/capabilities");
8630 my $cap = &read_file_contents("/proc/xen/capabilities");
8631 return $cap =~ /control_d/ ? 0 : 1;
8634 =head2 running_in_openvz
8636 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8637 at /proc/vz/veinfo for a non-zero line.
8640 sub running_in_openvz
8642 return 0 if (!-r "/proc/vz/veinfo");
8643 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8644 return 0 if (!$lref || !@$lref);
8645 foreach my $l (@$lref) {
8647 my @ll = split(/\s+/, $l);
8648 return 0 if ($ll[0] eq '0');
8653 =head2 list_categories(&modules, [include-empty])
8655 Returns a hash mapping category codes to names, including any custom-defined
8656 categories. The modules parameter must be an array ref of module hash objects,
8657 as returned by get_all_module_infos.
8662 my ($mods, $empty) = @_;
8663 my (%cats, %catnames);
8664 &read_file("$config_directory/webmin.catnames", \%catnames);
8665 foreach my $o (@lang_order_list) {
8666 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8671 foreach my $m (@$mods) {
8672 my $c = $m->{'category'};
8673 next if ($cats{$c});
8674 if (defined($catnames{$c})) {
8675 $cats{$c} = $catnames{$c};
8677 elsif ($text{"category_$c"}) {
8678 $cats{$c} = $text{"category_$c"};
8681 # try to get category name from module ..
8682 my %mtext = &load_language($m->{'dir'});
8683 if ($mtext{"category_$c"}) {
8684 $cats{$c} = $mtext{"category_$c"};
8687 $c = $m->{'category'} = "";
8688 $cats{$c} = $text{"category_$c"};
8695 =head2 is_readonly_mode
8697 Returns 1 if the current user is in read-only mode, and thus all writes
8698 to files and command execution should fail.
8701 sub is_readonly_mode
8703 if (!defined($main::readonly_mode_cache)) {
8704 my %gaccess = &get_module_acl(undef, "");
8705 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8707 return $main::readonly_mode_cache;
8710 =head2 command_as_user(user, with-env?, command, ...)
8712 Returns a command to execute some command as the given user, using the
8713 su statement. If on Linux, the /bin/sh shell is forced in case the user
8714 does not have a valid shell. If with-env is set to 1, the -s flag is added
8715 to the su command to read the user's .profile or .bashrc file.
8720 my ($user, $env, @args) = @_;
8721 my @uinfo = getpwnam($user);
8722 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8723 # User shell doesn't appear to be valid
8724 if ($gconfig{'os_type'} =~ /-linux$/) {
8725 # Use -s /bin/sh to force it
8726 $shellarg = " -s /bin/sh";
8728 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8729 $gconfig{'os_type'} eq 'solaris' &&
8730 $gconfig{'os_version'} >= 11 ||
8731 $gconfig{'os_type'} eq 'macos') {
8732 # Use -m and force /bin/sh
8733 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8737 my $rv = "su".($env ? " -" : "").$shellarg.
8738 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8742 =head2 list_osdn_mirrors(project, file)
8744 This function is now deprecated in favor of letting sourceforge just
8745 redirect to the best mirror, and now just returns their primary download URL.
8748 sub list_osdn_mirrors
8750 my ($project, $file) = @_;
8751 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8753 'mirror' => 'downloads' } );
8756 =head2 convert_osdn_url(url)
8758 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8759 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8760 to a real URL on the sourceforge download redirector.
8763 sub convert_osdn_url
8766 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8767 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8768 # Always use the Sourceforge mail download URL, which does
8769 # a location-based redirect for us
8770 my ($project, $file) = ($1, $2);
8771 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8773 return wantarray ? ( $url, 0 ) : $url;
8776 # Some other source .. don't change
8777 return wantarray ? ( $url, 2 ) : $url;
8781 =head2 get_current_dir
8783 Returns the directory the current process is running in.
8789 if ($gconfig{'os_type'} eq 'windows') {
8802 =head2 supports_users
8804 Returns 1 if the current OS supports Unix user concepts and functions like
8805 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8811 return $gconfig{'os_type'} ne 'windows';
8814 =head2 supports_symlinks
8816 Returns 1 if the current OS supports symbolic and hard links. This will not
8817 be the case on Windows.
8820 sub supports_symlinks
8822 return $gconfig{'os_type'} ne 'windows';
8825 =head2 quote_path(path)
8827 Returns a path with safe quoting for the current operating system.
8833 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8834 # Windows only supports "" style quoting
8838 return quotemeta($path);
8842 =head2 get_windows_root
8844 Returns the base windows system directory, like c:/windows.
8847 sub get_windows_root
8849 if ($ENV{'SystemRoot'}) {
8850 my $rv = $ENV{'SystemRoot'};
8855 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8859 =head2 read_file_contents(file)
8861 Given a filename, returns its complete contents as a string. Effectively
8862 the same as the Perl construct `cat file`.
8865 sub read_file_contents
8867 &open_readfile(FILE, $_[0]) || return undef;
8874 =head2 unix_crypt(password, salt)
8876 Performs Unix encryption on a password, using the built-in crypt function or
8877 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8878 must be either an already-hashed password, or a two-character alpha-numeric
8884 my ($pass, $salt) = @_;
8885 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8886 my $rv = eval "crypt(\$pass, \$salt)";
8888 return $rv if ($rv && !$@);
8889 eval "use Crypt::UnixCrypt";
8891 return Crypt::UnixCrypt::crypt($pass, $salt);
8894 &error("Failed to encrypt password : $err");
8898 =head2 split_quoted_string(string)
8900 Given a string like I<foo "bar baz" quux>, returns the array :
8904 sub split_quoted_string
8908 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8909 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8910 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8917 =head2 write_to_http_cache(url, file|&data)
8919 Updates the Webmin cache with the contents of the given file, possibly also
8920 clearing out old data. Mainly for internal use by http_download.
8923 sub write_to_http_cache
8925 my ($url, $file) = @_;
8926 return 0 if (!$gconfig{'cache_size'});
8928 # Don't cache downloads that look dynamic
8929 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8933 # Check if the current module should do caching
8934 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8935 # Caching all except some modules
8936 my @mods = split(/\s+/, $1);
8937 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8939 elsif ($gconfig{'cache_mods'}) {
8940 # Only caching some modules
8941 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8942 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8948 $size = length($$file);
8951 my @st = stat($file);
8955 if ($size > $gconfig{'cache_size'}) {
8956 # Bigger than the whole cache - so don't save it
8961 $cfile = "$main::http_cache_directory/$cfile";
8963 # See how much we have cached currently, clearing old files
8965 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8966 opendir(CACHEDIR, $main::http_cache_directory);
8967 foreach my $f (readdir(CACHEDIR)) {
8968 next if ($f eq "." || $f eq "..");
8969 my $path = "$main::http_cache_directory/$f";
8970 my @st = stat($path);
8971 if ($gconfig{'cache_days'} &&
8972 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8973 # This file is too old .. trash it
8978 push(@cached, [ $path, $st[7], $st[9] ]);
8982 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8983 while($total+$size > $gconfig{'cache_size'} && @cached) {
8984 # Cache is too big .. delete some files until the new one will fit
8985 unlink($cached[0]->[0]);
8986 $total -= $cached[0]->[1];
8990 # Finally, write out the new file
8992 &open_tempfile(CACHEFILE, ">$cfile");
8993 &print_tempfile(CACHEFILE, $$file);
8994 &close_tempfile(CACHEFILE);
8997 my ($ok, $err) = ©_source_dest($file, $cfile);
9003 =head2 check_in_http_cache(url)
9005 If some URL is in the cache and valid, return the filename for it. Mainly
9006 for internal use by http_download.
9009 sub check_in_http_cache
9012 return undef if (!$gconfig{'cache_size'});
9014 # Check if the current module should do caching
9015 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
9016 # Caching all except some modules
9017 my @mods = split(/\s+/, $1);
9018 return 0 if (&indexof(&get_module_name(), @mods) != -1);
9020 elsif ($gconfig{'cache_mods'}) {
9021 # Only caching some modules
9022 my @mods = split(/\s+/, $gconfig{'cache_mods'});
9023 return 0 if (&indexof(&get_module_name(), @mods) == -1);
9028 $cfile = "$main::http_cache_directory/$cfile";
9029 my @st = stat($cfile);
9030 return undef if (!@st || !$st[7]);
9031 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
9036 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
9041 =head2 supports_javascript
9043 Returns 1 if the current browser is assumed to support javascript.
9046 sub supports_javascript
9048 if (defined(&theme_supports_javascript)) {
9049 return &theme_supports_javascript();
9051 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
9054 =head2 get_module_name
9056 Returns the name of the Webmin module that called this function. For internal
9057 use only by other API functions.
9062 return &get_module_variable('$module_name');
9065 =head2 get_module_variable(name, [ref])
9067 Returns the value of some variable which is set in the caller's context, if
9068 using the new WebminCore package. For internal use only.
9071 sub get_module_variable
9073 my ($v, $wantref) = @_;
9074 my $slash = $wantref ? "\\" : "";
9075 my $thispkg = &web_libs_package();
9076 if ($thispkg eq 'WebminCore') {
9077 my ($vt, $vn) = split('', $v, 2);
9079 for(my $i=0; ($callpkg) = caller($i); $i++) {
9080 last if ($callpkg ne $thispkg);
9082 return eval "${slash}${vt}${callpkg}::${vn}";
9084 return eval "${slash}${v}";
9087 =head2 clear_time_locale()
9089 Temporarily force the locale to C, until reset_time_locale is called. This is
9090 useful if your code is going to call C<strftime> from the POSIX package, and
9091 you want to ensure that the output is in a consistent format.
9094 sub clear_time_locale
9096 if ($main::clear_time_locale_count == 0) {
9099 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
9100 POSIX::setlocale(POSIX::LC_TIME, "C");
9103 $main::clear_time_locale_count++;
9106 =head2 reset_time_locale()
9108 Revert the locale to whatever it was before clear_time_locale was called
9111 sub reset_time_locale
9113 if ($main::clear_time_locale_count == 1) {
9115 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
9116 $main::clear_time_locale_old = undef;
9119 $main::clear_time_locale_count--;
9122 =head2 callers_package(filehandle)
9124 Convert a non-module filehandle like FOO to one qualified with the
9125 caller's caller's package, like fsdump::FOO. For internal use only.
9131 my $callpkg = (caller(1))[0];
9132 my $thispkg = &web_libs_package();
9133 if (!ref($fh) && $fh !~ /::/ &&
9134 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
9135 $fh = $callpkg."::".$fh;
9140 =head2 web_libs_package()
9142 Returns the package this code is in. We can't always trust __PACKAGE__. For
9146 sub web_libs_package
9148 if ($called_from_webmin_core) {
9149 return "WebminCore";
9154 =head2 get_userdb_string
9156 Returns the URL-style string for connecting to the users and groups database
9159 sub get_userdb_string
9161 return undef if ($main::no_miniserv_userdb);
9163 &get_miniserv_config(\%miniserv);
9164 return $miniserv{'userdb'};
9167 =head2 connect_userdb(string)
9169 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
9170 On failure returns an error message string. In an array context, returns the
9177 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
9178 if ($proto eq "mysql") {
9179 # Connect to MySQL with DBI
9180 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9181 $drh || return $text{'sql_emysqldriver'};
9182 my ($host, $port) = split(/:/, $host);
9183 my $cstr = "database=$prefix;host=$host";
9184 $cstr .= ";port=$port" if ($port);
9185 my $dbh = $drh->connect($cstr, $user, $pass, { });
9186 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9187 $dbh->{'AutoCommit'} = 1;
9188 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9190 elsif ($proto eq "postgresql") {
9191 # Connect to PostgreSQL with DBI
9192 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9193 $drh || return $text{'sql_epostgresqldriver'};
9194 my ($host, $port) = split(/:/, $host);
9195 my $cstr = "dbname=$prefix;host=$host";
9196 $cstr .= ";port=$port" if ($port);
9197 my $dbh = $drh->connect($cstr, $user, $pass);
9198 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9199 $dbh->{'AutoCommit'} = 1;
9200 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9202 elsif ($proto eq "ldap") {
9203 # Connect with perl LDAP module
9204 eval "use Net::LDAP";
9205 $@ && return $text{'sql_eldapdriver'};
9206 my ($host, $port) = split(/:/, $host);
9207 my $scheme = $args->{'scheme'} || 'ldap';
9209 $port = $scheme eq 'ldaps' ? 636 : 389;
9211 my $ldap = Net::LDAP->new($host,
9213 'scheme' => $scheme);
9214 $ldap || return &text('sql_eldapconnect', $host);
9216 if ($args->{'tls'}) {
9217 # Switch to TLS mode
9218 eval { $mesg = $ldap->start_tls(); };
9219 if ($@ || !$mesg || $mesg->code) {
9220 return &text('sql_eldaptls',
9221 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9224 # Login to the server
9226 $mesg = $ldap->bind(dn => $user, password => $pass);
9229 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9231 if (!$mesg || $mesg->code) {
9232 return &text('sql_eldaplogin', $user,
9233 $mesg ? $mesg->error : "Unknown error");
9235 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9238 return "Unknown protocol $proto";
9242 =head2 disconnect_userdb(string, &handle)
9244 Closes a handle opened by connect_userdb
9247 sub disconnect_userdb
9250 if ($str =~ /^(mysql|postgresql):/) {
9255 elsif ($str =~ /^ldap:/) {
9262 =head2 split_userdb_string(string)
9264 Converts a string like mysql://user:pass@host/db into separate parts
9267 sub split_userdb_string
9270 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9271 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9272 ($1, $2, $3, $4, $5, $7);
9273 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9274 return ($proto, $user, $pass, $host, $prefix, \%args);
9279 $done_web_lib_funcs = 1;