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) = $userdb ? &connect_userdb($userdb) : ( );
1725 if ($proto eq "mysql" || $proto eq "postgresql") {
1726 # Select usernames and modules from SQL DB
1727 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'");
1728 if ($cmd && $cmd->execute()) {
1729 while(my ($user, $mods) = $cmd->fetchrow()) {
1730 my @mods = split(/\s+/, $mods);
1731 foreach my $m (@mods) {
1732 $main::acl_hash_cache{$user,
1735 $main::acl_array_cache{$user} = \@mods;
1738 $cmd->finish() if ($cmd);
1740 elsif ($proto eq "ldap") {
1741 # XXX read from LDAP
1743 &disconnect_userdb($userdb, $dbh);
1746 if ($_[0]) { %{$_[0]} = %main::acl_hash_cache; }
1747 if ($_[1]) { %{$_[1]} = %main::acl_array_cache; }
1752 Returns the file containing the webmin ACL, which is usually
1753 /etc/webmin/webmin.acl.
1758 return "$config_directory/webmin.acl";
1763 Does nothing, but kept around for compatability.
1770 =head2 get_miniserv_config(&hash)
1772 Reads the Webmin webserver's (miniserv.pl) configuration file, usually located
1773 at /etc/webmin/miniserv.conf, and stores its names and values in the given
1777 sub get_miniserv_config
1779 return &read_file_cached(
1780 $ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf", $_[0]);
1783 =head2 put_miniserv_config(&hash)
1785 Writes out the Webmin webserver configuration file from the contents of
1786 the given hash ref. This should be initially populated by get_miniserv_config,
1789 get_miniserv_config(\%miniserv);
1790 $miniserv{'port'} = 10005;
1791 put_miniserv_config(\%miniserv);
1795 sub put_miniserv_config
1797 &write_file($ENV{'MINISERV_CONFIG'} || "$config_directory/miniserv.conf",
1801 =head2 restart_miniserv([nowait])
1803 Kill the old miniserv process and re-start it, then optionally waits for
1804 it to restart. This will apply all configuration settings.
1807 sub restart_miniserv
1810 return undef if (&is_readonly_mode());
1812 &get_miniserv_config(\%miniserv) || return;
1815 if ($gconfig{'os_type'} ne 'windows') {
1816 # On Unix systems, we can restart with a signal
1817 my ($pid, $addr, $i);
1818 $miniserv{'inetd'} && return;
1819 my @oldst = stat($miniserv{'pidfile'});
1820 $pid = $ENV{'MINISERV_PID'};
1822 open(PID, $miniserv{'pidfile'}) ||
1823 &error("Failed to open PID file $miniserv{'pidfile'}");
1826 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1829 # Just signal miniserv to restart
1830 &kill_logged('HUP', $pid) || &error("Incorrect Webmin PID $pid");
1832 # Wait till new PID is written, indicating a restart
1833 for($i=0; $i<60; $i++) {
1835 my @newst = stat($miniserv{'pidfile'});
1836 last if ($newst[9] != $oldst[9]);
1838 $i < 60 || &error("Webmin server did not write new PID file");
1840 ## Totally kill the process and re-run it
1841 #$SIG{'TERM'} = 'IGNORE';
1842 #&kill_logged('TERM', $pid);
1843 #&system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1846 # On Windows, we need to use the flag file
1847 open(TOUCH, ">$miniserv{'restartflag'}");
1852 # wait for miniserv to come back up
1853 $addr = inet_aton($miniserv{'bind'} ? $miniserv{'bind'} : "127.0.0.1");
1855 for($i=0; $i<20; $i++) {
1857 socket(STEST, PF_INET, SOCK_STREAM, getprotobyname("tcp"));
1858 my $rv = connect(STEST,
1859 pack_sockaddr_in($miniserv{'port'}, $addr));
1861 last if ($rv && ++$ok >= 2);
1863 $i < 20 || &error("Failed to restart Webmin server!");
1867 =head2 reload_miniserv
1869 Sends a USR1 signal to the miniserv process, telling it to read-read it's
1870 configuration files. Not all changes will be applied though, such as the
1871 IP addresses and ports to accept connections on.
1876 return undef if (&is_readonly_mode());
1878 &get_miniserv_config(\%miniserv) || return;
1880 if ($gconfig{'os_type'} ne 'windows') {
1881 # Send a USR1 signal to re-read the config
1882 my ($pid, $addr, $i);
1883 $miniserv{'inetd'} && return;
1884 $pid = $ENV{'MINISERV_PID'};
1886 open(PID, $miniserv{'pidfile'}) ||
1887 &error("Failed to open PID file $miniserv{'pidfile'}");
1890 $pid || &error("Invalid PID file $miniserv{'pidfile'}");
1892 &kill_logged('USR1', $pid) || &error("Incorrect Webmin PID $pid");
1894 # Make sure this didn't kill Webmin!
1896 if (!kill(0, $pid)) {
1897 print STDERR "USR1 signal killed Webmin - restarting\n";
1898 &system_logged("$config_directory/start >/dev/null 2>&1 </dev/null");
1902 # On Windows, we need to use the flag file
1903 open(TOUCH, ">$miniserv{'reloadflag'}");
1908 =head2 check_os_support(&minfo, [os-type, os-version], [api-only])
1910 Returns 1 if some module is supported on the current operating system, or the
1911 OS supplies as parameters. The parameters are :
1913 =item minfo - A hash ref of module information, as returned by get_module_info
1915 =item os-type - The Webmin OS code to use instead of the system's real OS, such as redhat-linux
1917 =item os-version - The Webmin OS version to use, such as 13.0
1919 =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.
1922 sub check_os_support
1924 my $oss = $_[0]->{'os_support'};
1925 if ($_[3] && $oss && $_[0]->{'api_os_support'}) {
1926 # May provide usable API
1927 $oss .= " ".$_[0]->{'api_os_support'};
1929 if ($_[0]->{'nozone'} && &running_in_zone()) {
1930 # Not supported in a Solaris Zone
1933 if ($_[0]->{'novserver'} && &running_in_vserver()) {
1934 # Not supported in a Linux Vserver
1937 if ($_[0]->{'noopenvz'} && &running_in_openvz()) {
1938 # Not supported in an OpenVZ container
1941 return 1 if (!$oss || $oss eq '*');
1942 my $osver = $_[2] || $gconfig{'os_version'};
1943 my $ostype = $_[1] || $gconfig{'os_type'};
1946 my ($os, $ver, $codes);
1947 my ($neg) = ($oss =~ s/^!//); # starts with !
1948 $anyneg++ if ($neg);
1949 if ($oss =~ /^([^\/\s]+)\/([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1951 $os = $1; $ver = $2; $codes = $3; $oss = $4;
1953 elsif ($oss =~ /^([^\/\s]+)\/([^\/\s]+)\s*(.*)$/) {
1955 $os = $1; $ver = $2; $oss = $3;
1957 elsif ($oss =~ /^([^\{\s]+)\{([^\}]*)\}\s*(.*)$/) {
1959 $os = $1; $codes = $2; $oss = $3;
1961 elsif ($oss =~ /^\{([^\}]*)\}\s*(.*)$/) {
1963 $codes = $1; $oss = $2;
1965 elsif ($oss =~ /^(\S+)\s*(.*)$/) {
1967 $os = $1; $oss = $2;
1970 next if ($os && !($os eq $ostype ||
1971 $ostype =~ /^(\S+)-(\S+)$/ && $os eq "*-$2"));
1972 if ($ver =~ /^([0-9\.]+)\-([0-9\.]+)$/) {
1973 next if ($osver < $1 || $osver > $2);
1975 elsif ($ver =~ /^([0-9\.]+)\-\*$/) {
1976 next if ($osver < $1);
1978 elsif ($ver =~ /^\*\-([0-9\.]+)$/) {
1979 next if ($osver > $1);
1982 next if ($ver ne $osver);
1984 next if ($codes && !eval $codes);
1990 =head2 http_download(host, port, page, destfile, [&error], [&callback], [sslmode], [user, pass], [timeout], [osdn-convert], [no-cache], [&headers])
1992 Downloads data from a HTTP url to a local file or string. The parameters are :
1994 =item host - The hostname part of the URL, such as www.google.com
1996 =item port - The HTTP port number, such as 80
1998 =item page - The filename part of the URL, like /index.html
2000 =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.
2002 =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.
2004 =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.
2006 =item sslmode - If set to 1, an HTTPS connection is used instead of HTTP.
2008 =item user - If set, HTTP authentication is done with this username.
2010 =item pass - The HTTP password to use with the username above.
2012 =item timeout - A timeout in seconds to wait for the TCP connection to be established before failing.
2014 =item osdn-convert - If set to 1, URL for downloads from sourceforge are converted to use an appropriate mirror site.
2016 =item no-cache - If set to 1, Webmin's internal caching for this URL is disabled.
2018 =item headers - If set to a hash ref of additional HTTP headers, they will be added to the request.
2023 my ($host, $port, $page, $dest, $error, $cbfunc, $ssl, $user, $pass,
2024 $timeout, $osdn, $nocache, $headers) = @_;
2025 if ($gconfig{'debug_what_net'}) {
2026 &webmin_debug_log('HTTP', "host=$host port=$port page=$page ssl=$ssl".
2027 ($user ? " user=$user pass=$pass" : "").
2028 (ref($dest) ? "" : " dest=$dest"));
2031 # Convert OSDN URL first
2032 my $prot = $ssl ? "https://" : "http://";
2033 my $portstr = $ssl && $port == 443 ||
2034 !$ssl && $port == 80 ? "" : ":$port";
2035 ($host, $port, $page, $ssl) = &parse_http_url(
2036 &convert_osdn_url($prot.$host.$portstr.$page));
2039 # Check if we already have cached the URL
2040 my $url = ($ssl ? "https://" : "http://").$host.":".$port.$page;
2041 my $cfile = &check_in_http_cache($url);
2042 if ($cfile && !$nocache) {
2043 # Yes! Copy to dest file or variable
2044 &$cbfunc(6, $url) if ($cbfunc);
2046 &open_readfile(CACHEFILE, $cfile);
2048 $$dest = <CACHEFILE>;
2052 ©_source_dest($cfile, $dest);
2059 push(@headers, [ "Host", $host ]);
2060 push(@headers, [ "User-agent", "Webmin" ]);
2061 push(@headers, [ "Accept-language", "en" ]);
2063 my $auth = &encode_base64("$user:$pass");
2064 $auth =~ tr/\r\n//d;
2065 push(@headers, [ "Authorization", "Basic $auth" ]);
2067 foreach my $hname (keys %$headers) {
2068 push(@headers, [ $hname, $headers->{$hname} ]);
2071 # Actually download it
2072 $main::download_timed_out = undef;
2073 local $SIG{ALRM} = \&download_timeout;
2074 alarm($timeout || 60);
2075 my $h = &make_http_connection($host, $port, $ssl, "GET", $page, \@headers);
2077 $h = $main::download_timed_out if ($main::download_timed_out);
2079 if ($error) { $$error = $h; return; }
2080 else { &error($h); }
2082 &complete_http_download($h, $dest, $error, $cbfunc, $osdn, $host, $port,
2083 $headers, $ssl, $nocache);
2084 if ((!$error || !$$error) && !$nocache) {
2085 &write_to_http_cache($url, $dest);
2089 =head2 complete_http_download(handle, destfile, [&error], [&callback], [osdn], [oldhost], [oldport], [&send-headers], [old-ssl], [no-cache])
2091 Do a HTTP download, after the headers have been sent. For internal use only,
2092 typically called by http_download.
2095 sub complete_http_download
2097 local ($line, %header, @headers, $s); # Kept local so that callback funcs
2103 ($line = &read_http_connection($_[0])) =~ tr/\r\n//d;
2104 if ($line !~ /^HTTP\/1\..\s+(200|30[0-9])(\s+|$)/) {
2106 if ($_[2]) { ${$_[2]} = $line; return; }
2107 else { &error("Download failed : $line"); }
2110 &$cbfunc(1, $rcode >= 300 && $rcode < 400 ? 1 : 0)
2113 $line = &read_http_connection($_[0]);
2114 $line =~ tr/\r\n//d;
2115 $line =~ /^(\S+):\s+(.*)$/ || last;
2116 $header{lc($1)} = $2;
2117 push(@headers, [ lc($1), $2 ]);
2120 if ($main::download_timed_out) {
2121 if ($_[2]) { ${$_[2]} = $main::download_timed_out; return 0; }
2122 else { &error($main::download_timed_out); }
2124 &$cbfunc(2, $header{'content-length'}) if ($cbfunc);
2125 if ($rcode >= 300 && $rcode < 400) {
2126 # follow the redirect
2127 &$cbfunc(5, $header{'location'}) if ($cbfunc);
2128 my ($host, $port, $page, $ssl);
2129 if ($header{'location'} =~ /^(http|https):\/\/([^:]+):(\d+)(\/.*)?$/) {
2130 $ssl = $1 eq 'https' ? 1 : 0;
2131 $host = $2; $port = $3; $page = $4 || "/";
2133 elsif ($header{'location'} =~ /^(http|https):\/\/([^:\/]+)(\/.*)?$/) {
2134 $ssl = $1 eq 'https' ? 1 : 0;
2135 $host = $2; $port = 80; $page = $3 || "/";
2137 elsif ($header{'location'} =~ /^\// && $_[5]) {
2138 # Relative to same server
2142 $page = $header{'location'};
2144 elsif ($header{'location'}) {
2145 # Assume relative to same dir .. not handled
2146 if ($_[2]) { ${$_[2]} = "Invalid Location header $header{'location'}"; return; }
2147 else { &error("Invalid Location header $header{'location'}"); }
2150 if ($_[2]) { ${$_[2]} = "Missing Location header"; return; }
2151 else { &error("Missing Location header"); }
2154 ($page, $params) = split(/\?/, $page);
2156 $page .= "?".$params if (defined($params));
2157 &http_download($host, $port, $page, $_[1], $_[2], $cbfunc, $ssl,
2158 undef, undef, undef, $_[4], $_[9], $_[7]);
2163 # Append to a variable
2164 while(defined($buf = &read_http_connection($_[0], 1024))) {
2166 &$cbfunc(3, length(${$_[1]})) if ($cbfunc);
2172 if (!&open_tempfile(PFILE, ">$_[1]", 1)) {
2173 if ($_[2]) { ${$_[2]} = "Failed to write to $_[1] : $!"; return; }
2174 else { &error("Failed to write to $_[1] : $!"); }
2176 binmode(PFILE); # For windows
2177 while(defined($buf = &read_http_connection($_[0], 1024))) {
2178 &print_tempfile(PFILE, $buf);
2179 $got += length($buf);
2180 &$cbfunc(3, $got) if ($cbfunc);
2182 &close_tempfile(PFILE);
2183 if ($header{'content-length'} &&
2184 $got != $header{'content-length'}) {
2185 if ($_[2]) { ${$_[2]} = "Download incomplete"; return; }
2186 else { &error("Download incomplete"); }
2189 &$cbfunc(4) if ($cbfunc);
2191 &close_http_connection($_[0]);
2195 =head2 ftp_download(host, file, destfile, [&error], [&callback], [user, pass], [port])
2197 Download data from an FTP site to a local file. The parameters are :
2199 =item host - FTP server hostname
2201 =item file - File on the FTP server to download
2203 =item destfile - File on the Webmin system to download data to
2205 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2207 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing download progress.
2209 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2211 =item pass - Password for the username above.
2213 =item port - FTP server port number, which defaults to 21 if not set.
2218 my ($host, $file, $dest, $error, $cbfunc, $user, $pass, $port) = @_;
2220 if ($gconfig{'debug_what_net'}) {
2221 &webmin_debug_log('FTP', "host=$host port=$port file=$file".
2222 ($user ? " user=$user pass=$pass" : "").
2223 (ref($dest) ? "" : " dest=$dest"));
2227 if (&is_readonly_mode()) {
2228 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2230 else { &error("FTP connections not allowed in readonly mode"); }
2233 # Check if we already have cached the URL
2234 my $url = "ftp://".$host.$file;
2235 my $cfile = &check_in_http_cache($url);
2237 # Yes! Copy to dest file or variable
2238 &$cbfunc(6, $url) if ($cbfunc);
2240 &open_readfile(CACHEFILE, $cfile);
2242 $$dest = <CACHEFILE>;
2246 ©_source_dest($cfile, $dest);
2251 # Actually download it
2252 $main::download_timed_out = undef;
2253 local $SIG{ALRM} = \&download_timeout;
2256 if ($gconfig{'ftp_proxy'} =~ /^http:\/\/(\S+):(\d+)/ && !&no_proxy($_[0])) {
2257 # download through http-style proxy
2259 if (&open_socket($1, $2, "SOCK", \$error)) {
2261 if ($main::download_timed_out) {
2263 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2264 else { &error($main::download_timed_out); }
2266 my $esc = $_[1]; $esc =~ s/ /%20/g;
2267 my $up = "$_[5]:$_[6]\@" if ($_[5]);
2268 my $portstr = $port == 21 ? "" : ":$port";
2269 print SOCK "GET ftp://$up$_[0]$portstr$esc HTTP/1.0\r\n";
2270 print SOCK "User-agent: Webmin\r\n";
2271 if ($gconfig{'proxy_user'}) {
2272 my $auth = &encode_base64(
2273 "$gconfig{'proxy_user'}:$gconfig{'proxy_pass'}");
2274 $auth =~ tr/\r\n//d;
2275 print SOCK "Proxy-Authorization: Basic $auth\r\n";
2278 &complete_http_download({ 'fh' => "SOCK" }, $_[2], $_[3], $_[4]);
2281 elsif (!$gconfig{'proxy_fallback'}) {
2283 if ($error) { $$error = $main::download_timed_out; return 0; }
2284 else { &error($main::download_timed_out); }
2289 # connect to host and login with real FTP protocol
2290 &open_socket($_[0], $port, "SOCK", $_[3]) || return 0;
2292 if ($main::download_timed_out) {
2293 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2294 else { &error($main::download_timed_out); }
2296 &ftp_command("", 2, $_[3]) || return 0;
2298 # Login as supplied user
2299 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2301 if (int($urv[1]/100) == 3) {
2302 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2306 # Login as anonymous
2307 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2309 if (int($urv[1]/100) == 3) {
2310 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2314 &$cbfunc(1, 0) if ($cbfunc);
2317 # get the file size and tell the callback
2318 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2319 my $size = &ftp_command("SIZE $_[1]", 2, $_[3]);
2320 defined($size) || return 0;
2322 &$cbfunc(2, int($size));
2326 my $pasv = &ftp_command("PASV", 2, $_[3]);
2327 defined($pasv) || return 0;
2328 $pasv =~ /\(([0-9,]+)\)/;
2329 @n = split(/,/ , $1);
2330 &open_socket("$n[0].$n[1].$n[2].$n[3]",
2331 $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2332 &ftp_command("RETR $_[1]", 1, $_[3]) || return 0;
2336 &open_tempfile(PFILE, ">$_[2]", 1);
2337 while(read(CON, $buf, 1024) > 0) {
2338 &print_tempfile(PFILE, $buf);
2339 $got += length($buf);
2340 &$cbfunc(3, $got) if ($cbfunc);
2342 &close_tempfile(PFILE);
2344 if ($got != $size) {
2345 if ($_[3]) { ${$_[3]} = "Download incomplete"; return 0; }
2346 else { &error("Download incomplete"); }
2348 &$cbfunc(4) if ($cbfunc);
2350 &ftp_command("", 2, $_[3]) || return 0;
2354 &ftp_command("QUIT", 2, $_[3]) || return 0;
2358 &write_to_http_cache($url, $dest);
2362 =head2 ftp_upload(host, file, srcfile, [&error], [&callback], [user, pass], [port])
2364 Upload data from a local file to an FTP site. The parameters are :
2366 =item host - FTP server hostname
2368 =item file - File on the FTP server to write to
2370 =item srcfile - File on the Webmin system to upload data from
2372 =item error - If set to a string ref, any error message is written into this string and the function returns 0 on failure, 1 on success. Otherwise, error is called on failure.
2374 =item callback - If set to a function ref, it will be called after each block of data is received. This is typically set to \&progress_callback, for printing upload progress.
2376 =item user - Username to login to the FTP server as. If missing, Webmin will login as anonymous.
2378 =item pass - Password for the username above.
2380 =item port - FTP server port number, which defaults to 21 if not set.
2387 if (&is_readonly_mode()) {
2388 if ($_[3]) { ${$_[3]} = "FTP connections not allowed in readonly mode";
2390 else { &error("FTP connections not allowed in readonly mode"); }
2393 $main::download_timed_out = undef;
2394 local $SIG{ALRM} = \&download_timeout;
2397 # connect to host and login
2398 &open_socket($_[0], $_[7] || 21, "SOCK", $_[3]) || return 0;
2400 if ($main::download_timed_out) {
2401 if ($_[3]) { ${$_[3]} = $main::download_timed_out; return 0; }
2402 else { &error($main::download_timed_out); }
2404 &ftp_command("", 2, $_[3]) || return 0;
2406 # Login as supplied user
2407 my @urv = &ftp_command("USER $_[5]", [ 2, 3 ], $_[3]);
2409 if (int($urv[1]/100) == 3) {
2410 &ftp_command("PASS $_[6]", 2, $_[3]) || return 0;
2414 # Login as anonymous
2415 my @urv = &ftp_command("USER anonymous", [ 2, 3 ], $_[3]);
2417 if (int($urv[1]/100) == 3) {
2418 &ftp_command("PASS root\@".&get_system_hostname(), 2,
2422 &$cbfunc(1, 0) if ($cbfunc);
2424 &ftp_command("TYPE I", 2, $_[3]) || return 0;
2426 # get the file size and tell the callback
2427 my @st = stat($_[2]);
2429 &$cbfunc(2, $st[7]);
2433 my $pasv = &ftp_command("PASV", 2, $_[3]);
2434 defined($pasv) || return 0;
2435 $pasv =~ /\(([0-9,]+)\)/;
2436 @n = split(/,/ , $1);
2437 &open_socket("$n[0].$n[1].$n[2].$n[3]", $n[4]*256 + $n[5], "CON", $_[3]) || return 0;
2438 &ftp_command("STOR $_[1]", 1, $_[3]) || return 0;
2443 while(read(PFILE, $buf, 1024) > 0) {
2445 $got += length($buf);
2446 &$cbfunc(3, $got) if ($cbfunc);
2450 if ($got != $st[7]) {
2451 if ($_[3]) { ${$_[3]} = "Upload incomplete"; return 0; }
2452 else { &error("Upload incomplete"); }
2454 &$cbfunc(4) if ($cbfunc);
2457 &ftp_command("", 2, $_[3]) || return 0;
2458 &ftp_command("QUIT", 2, $_[3]) || return 0;
2464 =head2 no_proxy(host)
2466 Checks if some host is on the no proxy list. For internal use by the
2467 http_download and ftp_download functions.
2472 my $ip = &to_ipaddress($_[0]);
2473 foreach my $n (split(/\s+/, $gconfig{'noproxy'})) {
2474 return 1 if ($_[0] =~ /\Q$n\E/ ||
2480 =head2 open_socket(host, port, handle, [&error])
2482 Open a TCP connection to some host and port, using a file handle. The
2485 =item host - Hostname or IP address to connect to.
2487 =item port - TCP port number.
2489 =item handle - A file handle name to use for the connection.
2491 =item error - A string reference to write any error message into. If not set, the error function is called on failure.
2496 my ($host, $port, $fh, $err) = @_;
2497 $fh = &callers_package($fh);
2499 if ($gconfig{'debug_what_net'}) {
2500 &webmin_debug_log('TCP', "host=$host port=$port");
2502 if (!socket($fh, PF_INET, SOCK_STREAM, getprotobyname("tcp"))) {
2503 if ($err) { $$err = "Failed to create socket : $!"; return 0; }
2504 else { &error("Failed to create socket : $!"); }
2507 if (!($addr = inet_aton($host))) {
2508 if ($err) { $$err = "Failed to lookup IP address for $host"; return 0; }
2509 else { &error("Failed to lookup IP address for $host"); }
2511 if ($gconfig{'bind_proxy'}) {
2512 if (!bind($fh,pack_sockaddr_in(0, inet_aton($gconfig{'bind_proxy'})))) {
2513 if ($err) { $$err = "Failed to bind to source address : $!"; return 0; }
2514 else { &error("Failed to bind to source address : $!"); }
2517 if (!connect($fh, pack_sockaddr_in($port, $addr))) {
2518 if ($err) { $$err = "Failed to connect to $host:$port : $!"; return 0; }
2519 else { &error("Failed to connect to $host:$port : $!"); }
2521 my $old = select($fh); $| =1; select($old);
2525 =head2 download_timeout
2527 Called when a download times out. For internal use only.
2530 sub download_timeout
2532 $main::download_timed_out = "Download timed out";
2535 =head2 ftp_command(command, expected, [&error], [filehandle])
2537 Send an FTP command, and die if the reply is not what was expected. Mainly
2538 for internal use by the ftp_download and ftp_upload functions.
2543 my ($cmd, $expect, $err, $fh) = @_;
2545 $fh = &callers_package($fh);
2548 my $what = $cmd ne "" ? "<i>$cmd</i>" : "initial connection";
2550 print $fh "$cmd\r\n";
2553 if (!($line = <$fh>)) {
2555 if ($err) { $$err = "Failed to read reply to $what"; return undef; }
2556 else { &error("Failed to read reply to $what"); }
2558 $line =~ /^(...)(.)(.*)$/;
2561 foreach my $c (@$expect) {
2562 $found++ if (int($1/100) == $c);
2566 $found++ if (int($1/100) == $_[1]);
2570 if ($err) { $$err = "$what failed : $3"; return undef; }
2571 else { &error("$what failed : $3"); }
2576 # Need to skip extra stuff..
2578 if (!($line = <$fh>)) {
2580 if ($$err) { $$err = "Failed to read reply to $what";
2582 else { &error("Failed to read reply to $what"); }
2584 $line =~ /^(....)(.*)$/; $reply .= $2;
2585 if ($1 eq "$rcode ") { last; }
2589 return wantarray ? ($reply, $rcode) : $reply;
2592 =head2 to_ipaddress(hostname)
2594 Converts a hostname to an a.b.c.d format IP address, or returns undef if
2595 it cannot be resolved.
2600 if (&check_ipaddress($_[0])) {
2604 my $hn = gethostbyname($_[0]);
2605 return undef if (!$hn);
2606 local @ip = unpack("CCCC", $hn);
2607 return join("." , @ip);
2611 =head2 icons_table(&links, &titles, &icons, [columns], [href], [width], [height], &befores, &afters)
2613 Renders a 4-column table of icons. The useful parameters are :
2615 =item links - An array ref of link destination URLs for the icons.
2617 =item titles - An array ref of titles to appear under the icons.
2619 =item icons - An array ref of URLs for icon images.
2621 =item columns - Number of columns to layout the icons with. Defaults to 4.
2626 &load_theme_library();
2627 if (defined(&theme_icons_table)) {
2628 &theme_icons_table(@_);
2632 my $cols = $_[3] ? $_[3] : 4;
2633 my $per = int(100.0 / $cols);
2634 print "<table class='icons_table' width=100% cellpadding=5>\n";
2635 for(my $i=0; $i<@{$_[0]}; $i++) {
2636 if ($i%$cols == 0) { print "<tr>\n"; }
2637 print "<td width=$per% align=center valign=top>\n";
2638 &generate_icon($_[2]->[$i], $_[1]->[$i], $_[0]->[$i],
2639 ref($_[4]) ? $_[4]->[$i] : $_[4], $_[5], $_[6],
2640 $_[7]->[$i], $_[8]->[$i]);
2642 if ($i%$cols == $cols-1) { print "</tr>\n"; }
2644 while($i++%$cols) { print "<td width=$per%></td>\n"; $need_tr++; }
2645 print "</tr>\n" if ($need_tr);
2649 =head2 replace_file_line(file, line, [newline]*)
2651 Replaces one line in some file with 0 or more new lines. The parameters are :
2653 =item file - Full path to some file, like /etc/hosts.
2655 =item line - Line number to replace, starting from 0.
2657 =item newline - Zero or more lines to put into the file at the given line number. These must be newline-terminated strings.
2660 sub replace_file_line
2663 my $realfile = &translate_filename($_[0]);
2664 open(FILE, $realfile);
2667 if (@_ > 2) { splice(@lines, $_[1], 1, @_[2..$#_]); }
2668 else { splice(@lines, $_[1], 1); }
2669 &open_tempfile(FILE, ">$realfile");
2670 &print_tempfile(FILE, @lines);
2671 &close_tempfile(FILE);
2674 =head2 read_file_lines(file, [readonly])
2676 Returns a reference to an array containing the lines from some file. This
2677 array can be modified, and will be written out when flush_file_lines()
2678 is called. The parameters are :
2680 =item file - Full path to the file to read.
2682 =item readonly - Should be set 1 if the caller is only going to read the lines, and never write it out.
2686 $lref = read_file_lines("/etc/hosts");
2687 push(@$lref, "127.0.0.1 localhost");
2688 flush_file_lines("/etc/hosts");
2694 my ($package, $filename, $line) = caller;
2695 print STDERR "Missing file to read at ${package}::${filename} line $line\n";
2697 my $realfile = &translate_filename($_[0]);
2698 if (!$main::file_cache{$realfile}) {
2701 &webmin_debug_log('READ', $_[0]) if ($gconfig{'debug_what_read'});
2702 open(READFILE, $realfile);
2705 $eol = /\r\n$/ ? "\r\n" : "\n";
2711 $main::file_cache{$realfile} = \@lines;
2712 $main::file_cache_noflush{$realfile} = $_[1];
2713 $main::file_cache_eol{$realfile} = $eol || "\n";
2716 # Make read-write if currently readonly
2718 $main::file_cache_noflush{$realfile} = 0;
2721 return $main::file_cache{$realfile};
2724 =head2 flush_file_lines([file], [eol])
2726 Write out to a file previously read by read_file_lines to disk (except
2727 for those marked readonly). The parameters are :
2729 =item file - The file to flush out.
2731 =item eof - End-of-line character for each line. Defaults to \n.
2734 sub flush_file_lines
2738 local $trans = &translate_filename($_[0]);
2739 $main::file_cache{$trans} ||
2740 &error("flush_file_lines called on non-loaded file $trans");
2741 push(@files, $trans);
2744 @files = ( keys %main::file_cache );
2746 foreach my $f (@files) {
2747 my $eol = $_[1] || $main::file_cache_eol{$f} || "\n";
2748 if (!$main::file_cache_noflush{$f}) {
2749 no warnings; # XXX Bareword file handles should go away
2750 &open_tempfile(FLUSHFILE, ">$f");
2751 foreach my $line (@{$main::file_cache{$f}}) {
2752 (print FLUSHFILE $line,$eol) ||
2753 &error(&text("efilewrite", $f, $!));
2755 &close_tempfile(FLUSHFILE);
2757 delete($main::file_cache{$f});
2758 delete($main::file_cache_noflush{$f});
2762 =head2 unflush_file_lines(file)
2764 Clear the internal cache of some given file, previously read by read_file_lines.
2767 sub unflush_file_lines
2769 my $realfile = &translate_filename($_[0]);
2770 delete($main::file_cache{$realfile});
2771 delete($main::file_cache_noflush{$realfile});
2774 =head2 unix_user_input(fieldname, user, [form])
2776 Returns HTML for an input to select a Unix user. By default this is a text
2777 box with a user popup button next to it.
2782 if (defined(&theme_unix_user_input)) {
2783 return &theme_unix_user_input(@_);
2785 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2786 &user_chooser_button($_[0], 0, $_[2] || 0)."\n";
2789 =head2 unix_group_input(fieldname, user, [form])
2791 Returns HTML for an input to select a Unix group. By default this is a text
2792 box with a group popup button next to it.
2795 sub unix_group_input
2797 if (defined(&theme_unix_group_input)) {
2798 return &theme_unix_group_input(@_);
2800 return "<input name=$_[0] size=13 value=\"$_[1]\"> ".
2801 &group_chooser_button($_[0], 0, $_[2] || 0)."\n";
2804 =head2 hlink(text, page, [module], [width], [height])
2806 Returns HTML for a link that when clicked on pops up a window for a Webmin
2807 help page. The parameters are :
2809 =item text - Text for the link.
2811 =item page - Help page code, such as 'intro'.
2813 =item module - Module the help page is in. Defaults to the current module.
2815 =item width - Width of the help popup window. Defaults to 600 pixels.
2817 =item height - Height of the help popup window. Defaults to 400 pixels.
2819 The actual help pages are in each module's help sub-directory, in files with
2825 if (defined(&theme_hlink)) {
2826 return &theme_hlink(@_);
2828 my $mod = $_[2] ? $_[2] : &get_module_name();
2829 my $width = $_[3] || $tconfig{'help_width'} || $gconfig{'help_width'} || 600;
2830 my $height = $_[4] || $tconfig{'help_height'} || $gconfig{'help_height'} || 400;
2831 return "<a onClick='window.open(\"$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>";
2834 =head2 user_chooser_button(field, multiple, [form])
2836 Returns HTML for a javascript button for choosing a Unix user or users.
2837 The parameters are :
2839 =item field - Name of the HTML field to place the username into.
2841 =item multiple - Set to 1 if multiple users can be selected.
2843 =item form - Index of the form on the page.
2846 sub user_chooser_button
2848 return undef if (!&supports_users());
2849 return &theme_user_chooser_button(@_)
2850 if (defined(&theme_user_chooser_button));
2851 my $form = defined($_[2]) ? $_[2] : 0;
2852 my $w = $_[1] ? 500 : 300;
2854 if ($_[1] && $gconfig{'db_sizeusers'}) {
2855 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2857 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2858 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2860 return "<input type=button onClick='ifield = form.$_[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";
2863 =head2 group_chooser_button(field, multiple, [form])
2865 Returns HTML for a javascript button for choosing a Unix group or groups
2866 The parameters are :
2868 =item field - Name of the HTML field to place the group name into.
2870 =item multiple - Set to 1 if multiple groups can be selected.
2872 =item form - Index of the form on the page.
2875 sub group_chooser_button
2877 return undef if (!&supports_users());
2878 return &theme_group_chooser_button(@_)
2879 if (defined(&theme_group_chooser_button));
2880 my $form = defined($_[2]) ? $_[2] : 0;
2881 my $w = $_[1] ? 500 : 300;
2883 if ($_[1] && $gconfig{'db_sizeusers'}) {
2884 ($w, $h) = split(/x/, $gconfig{'db_sizeusers'});
2886 elsif (!$_[1] && $gconfig{'db_sizeuser'}) {
2887 ($w, $h) = split(/x/, $gconfig{'db_sizeuser'});
2889 return "<input type=button onClick='ifield = form.$_[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";
2892 =head2 foreign_check(module, [api-only])
2894 Checks if some other module exists and is supported on this OS. The parameters
2897 =item module - Name of the module to check.
2899 =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.
2904 my ($mod, $api) = @_;
2906 my $mdir = &module_root_directory($mod);
2907 &read_file_cached("$mdir/module.info", \%minfo) || return 0;
2908 return &check_os_support(\%minfo, undef, undef, $api);
2911 =head2 foreign_exists(module)
2913 Checks if some other module exists. The module parameter is the short module
2919 my $mdir = &module_root_directory($_[0]);
2920 return -r "$mdir/module.info";
2923 =head2 foreign_available(module)
2925 Returns 1 if some module is installed, and acessible to the current user. The
2926 module parameter is the module directory name.
2929 sub foreign_available
2931 return 0 if (!&foreign_check($_[0]) &&
2932 !$gconfig{'available_even_if_no_support'});
2933 my %foreign_module_info = &get_module_info($_[0]);
2935 # Check list of allowed modules
2937 &read_acl(\%acl, undef);
2938 return 0 if (!$acl{$base_remote_user,$_[0]} &&
2939 !$acl{$base_remote_user,'*'});
2941 # Check for usermod restrictions
2942 my @usermods = &list_usermods();
2943 return 0 if (!&available_usermods( [ \%foreign_module_info ], \@usermods));
2945 if (&get_product_name() eq "webmin") {
2946 # Check if the user has any RBAC privileges in this module
2947 if (&supports_rbac($_[0]) &&
2948 &use_rbac_module_acl(undef, $_[0])) {
2949 # RBAC is enabled for this user and module - check if he
2951 my $rbacs = &get_rbac_module_acl($remote_user, $_[0]);
2952 return 0 if (!$rbacs);
2954 elsif ($gconfig{'rbacdeny_'.$base_remote_user}) {
2955 # If denying access to modules not specifically allowed by
2956 # RBAC, then prevent access
2961 # Check readonly support
2962 if (&is_readonly_mode()) {
2963 return 0 if (!$foreign_module_info{'readonly'});
2966 # Check if theme vetos
2967 if (defined(&theme_foreign_available)) {
2968 return 0 if (!&theme_foreign_available($_[0]));
2971 # Check if licence module vetos
2972 if ($main::licence_module) {
2973 return 0 if (!&foreign_call($main::licence_module,
2974 "check_module_licence", $_[0]));
2980 =head2 foreign_require(module, [file], [package])
2982 Brings in functions from another module, and places them in the Perl namespace
2983 with the same name as the module. The parameters are :
2985 =item module - The source module's directory name, like sendmail.
2987 =item file - The API file in that module, like sendmail-lib.pl. If missing, all API files are loaded.
2989 =item package - Perl package to place the module's functions and global variables in.
2991 If the original module name contains dashes, they will be replaced with _ in
2997 my ($mod, $file, $pkg) = @_;
2998 $pkg ||= $mod || "global";
2999 $pkg =~ s/[^A-Za-z0-9]/_/g;
3002 push(@files, $file);
3006 my %minfo = &get_module_info($mod);
3007 if ($minfo{'library'}) {
3008 @files = split(/\s+/, $minfo{'library'});
3011 @files = ( $mod."-lib.pl" );
3014 @files = grep { !$main::done_foreign_require{$pkg,$_} } @files;
3015 return 1 if (!@files);
3016 foreach my $f (@files) {
3017 $main::done_foreign_require{$pkg,$f}++;
3020 my $mdir = &module_root_directory($mod);
3021 @INC = &unique($mdir, @INC);
3022 -d $mdir || &error("Module $mod does not exist");
3023 if (!&get_module_name() && $mod) {
3026 my $old_fmn = $ENV{'FOREIGN_MODULE_NAME'};
3027 my $old_frd = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3028 my $code = "package $pkg; ".
3029 "\$ENV{'FOREIGN_MODULE_NAME'} = '$mod'; ".
3030 "\$ENV{'FOREIGN_ROOT_DIRECTORY'} = '$root_directory'; ";
3031 foreach my $f (@files) {
3032 $code .= "do '$mdir/$f' || die \$@; ";
3035 if (defined($old_fmn)) {
3036 $ENV{'FOREIGN_MODULE_NAME'} = $old_fmn;
3039 delete($ENV{'FOREIGN_MODULE_NAME'});
3041 if (defined($old_frd)) {
3042 $ENV{'FOREIGN_ROOT_DIRECTORY'} = $old_frd;
3045 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
3048 if ($@) { &error("Require $mod/$files[0] failed : <pre>$@</pre>"); }
3052 =head2 foreign_call(module, function, [arg]*)
3054 Call a function in another module. The module parameter is the target module
3055 directory name, function is the perl sub to call, and the remaining parameters
3056 are the arguments. However, unless you need to call a function whose name
3057 is dynamic, it is better to use Perl's cross-module function call syntax
3058 like module::function(args).
3063 my $pkg = $_[0] || "global";
3064 $pkg =~ s/[^A-Za-z0-9]/_/g;
3065 my @args = @_[2 .. @_-1];
3066 $main::foreign_args = \@args;
3067 my @rv = eval <<EOF;
3069 &$_[1](\@{\$main::foreign_args});
3071 if ($@) { &error("$_[0]::$_[1] failed : $@"); }
3072 return wantarray ? @rv : $rv[0];
3075 =head2 foreign_config(module, [user-config])
3077 Get the configuration from another module, and return it as a hash. If the
3078 user-config parameter is set to 1, returns the Usermin user-level preferences
3079 for the current user instead.
3084 my ($mod, $uc) = @_;
3087 &read_file_cached("$root_directory/$mod/defaultuconfig", \%fconfig);
3088 &read_file_cached("$config_directory/$mod/uconfig", \%fconfig);
3089 &read_file_cached("$user_config_directory/$mod/config", \%fconfig);
3092 &read_file_cached("$config_directory/$mod/config", \%fconfig);
3097 =head2 foreign_installed(module, mode)
3099 Checks if the server for some module is installed, and possibly also checks
3100 if the module has been configured by Webmin.
3101 For mode 1, returns 2 if the server is installed and configured for use by
3102 Webmin, 1 if installed but not configured, or 0 otherwise.
3103 For mode 0, returns 1 if installed, 0 if not.
3104 If the module does not provide an install_check.pl script, assumes that
3105 the server is installed.
3108 sub foreign_installed
3110 my ($mod, $configured) = @_;
3111 if (defined($main::foreign_installed_cache{$mod,$configured})) {
3113 return $main::foreign_installed_cache{$mod,$configured};
3117 if (!&foreign_check($mod)) {
3122 my $mdir = &module_root_directory($mod);
3123 if (!-r "$mdir/install_check.pl") {
3124 # Not known, assume OK
3125 $rv = $configured ? 2 : 1;
3128 # Call function to check
3129 &foreign_require($mod, "install_check.pl");
3130 $rv = &foreign_call($mod, "is_installed", $configured);
3133 $main::foreign_installed_cache{$mod,$configured} = $rv;
3138 =head2 foreign_defined(module, function)
3140 Returns 1 if some function is defined in another module. In general, it is
3141 simpler to use the syntax &defined(module::function) instead.
3147 $pkg =~ s/[^A-Za-z0-9]/_/g;
3148 my $func = "${pkg}::$_[1]";
3149 return defined(&$func);
3152 =head2 get_system_hostname([short])
3154 Returns the hostname of this system. If the short parameter is set to 1,
3155 then the domain name is not prepended - otherwise, Webmin will attempt to get
3156 the fully qualified hostname, like foo.example.com.
3159 sub get_system_hostname
3162 if (!$main::get_system_hostname[$m]) {
3163 if ($gconfig{'os_type'} ne 'windows') {
3164 # Try some common Linux hostname files first
3166 if ($gconfig{'os_type'} eq 'redhat-linux') {
3168 &read_env_file("/etc/sysconfig/network", \%nc);
3169 if ($nc{'HOSTNAME'}) {
3170 $fromfile = $nc{'HOSTNAME'};
3173 elsif ($gconfig{'os_type'} eq 'debian-linux') {
3174 my $hn = &read_file_contents("/etc/hostname");
3180 elsif ($gconfig{'os_type'} eq 'open-linux') {
3181 my $hn = &read_file_contents("/etc/HOSTNAME");
3187 elsif ($gconfig{'os_type'} eq 'solaris') {
3188 my $hn = &read_file_contents("/etc/nodename");
3195 # If we found a hostname, use it if value
3196 if ($fromfile && ($m || $fromfile =~ /\./)) {
3198 $fromfile =~ s/\..*$//;
3200 $main::get_system_hostname[$m] = $fromfile;
3204 # Can use hostname command on Unix
3205 &execute_command("hostname", undef,
3206 \$main::get_system_hostname[$m], undef, 0, 1);
3207 chop($main::get_system_hostname[$m]);
3209 eval "use Sys::Hostname";
3211 $main::get_system_hostname[$m] = eval "hostname()";
3213 if ($@ || !$main::get_system_hostname[$m]) {
3214 $main::get_system_hostname[$m] = "UNKNOWN";
3217 elsif ($main::get_system_hostname[$m] !~ /\./ &&
3218 $gconfig{'os_type'} =~ /linux$/ &&
3219 !$gconfig{'no_hostname_f'} && !$_[0]) {
3220 # Try with -f flag to get fully qualified name
3222 my $ex = &execute_command("hostname -f", undef, \$flag,
3225 if ($ex || $flag eq "") {
3226 # -f not supported! We have probably set the
3227 # hostname to just '-f'. Fix the problem
3230 &execute_command("hostname ".
3231 quotemeta($main::get_system_hostname[$m]),
3232 undef, undef, undef, 0, 1);
3236 $main::get_system_hostname[$m] = $flag;
3241 # On Windows, try computername environment variable
3242 return $ENV{'computername'} if ($ENV{'computername'});
3243 return $ENV{'COMPUTERNAME'} if ($ENV{'COMPUTERNAME'});
3245 # Fall back to net name command
3246 my $out = `net name 2>&1`;
3247 if ($out =~ /\-+\r?\n(\S+)/) {
3248 $main::get_system_hostname[$m] = $1;
3251 $main::get_system_hostname[$m] = "windows";
3255 return $main::get_system_hostname[$m];
3258 =head2 get_webmin_version
3260 Returns the version of Webmin currently being run, such as 1.450.
3263 sub get_webmin_version
3265 if (!$get_webmin_version) {
3266 open(VERSION, "$root_directory/version") || return 0;
3267 ($get_webmin_version = <VERSION>) =~ tr/\r|\n//d;
3270 return $get_webmin_version;
3273 =head2 get_module_acl([user], [module], [no-rbac], [no-default])
3275 Returns a hash containing access control options for the given user and module.
3276 By default the current username and module name are used. If the no-rbac flag
3277 is given, the permissions will not be updated based on the user's RBAC role
3278 (as seen on Solaris). If the no-default flag is given, default permissions for
3279 the module will not be included.
3284 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
3285 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3286 my $mdir = &module_root_directory($m);
3289 # Read default ACL first, to be overridden by per-user settings
3290 &read_file_cached("$mdir/defaultacl", \%rv);
3292 # If this isn't a master admin user, apply the negative permissions
3293 # so that he doesn't un-expectedly gain access to new features
3295 &read_file_cached("$config_directory/$u.acl", \%gaccess);
3296 if ($gaccess{'negative'}) {
3297 &read_file_cached("$mdir/negativeacl", \%rv);
3301 if (!$_[2] && &supports_rbac($m) && &use_rbac_module_acl($u, $m)) {
3302 # RBAC overrides exist for this user in this module
3303 my $rbac = &get_rbac_module_acl(
3304 defined($_[0]) ? $_[0] : $remote_user, $m);
3305 foreach my $r (keys %$rbac) {
3306 $rv{$r} = $rbac->{$r};
3309 elsif ($gconfig{"risk_$u"} && $m) {
3310 # ACL is defined by user's risk level
3311 my $rf = $gconfig{"risk_$u"}.'.risk';
3312 &read_file_cached("$mdir/$rf", \%rv);
3314 my $sf = $gconfig{"skill_$u"}.'.skill';
3315 &read_file_cached("$mdir/$sf", \%rv);
3318 # Use normal Webmin ACL, if a user is set
3319 my $userdb = &get_userdb_string();
3321 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3322 # Look for this user in the user/group DB, if one is defined
3323 # and if the user might be in the DB
3324 my ($dbh, $proto) = &connect_userdb($userdb);
3325 ref($dbh) || &error(&text('euserdbacl', $dbh));
3326 if ($proto eq "mysql" || $proto eq "postgresql") {
3327 # Find the user in the SQL DB
3328 my $cmd = $dbh->prepare(
3329 "select id from webmin_user where name = ?");
3330 $cmd && $cmd->execute($u) ||
3331 &error(&text('euserdbacl', $dbh->errstr));
3332 my ($id) = $cmd->fetchrow();
3333 $foundindb = 1 if (defined($id));
3336 # Fetch ACLs with SQL
3338 my $cmd = $dbh->prepare(
3339 "select attr,value from webmin_user_acl ".
3340 "where id = ? and module = ?");
3341 $cmd && $cmd->execute($id, $m) ||
3342 &error(&text('euserdbacl', $dbh->errstr));
3343 while(my ($a, $v) = $cmd->fetchrow()) {
3349 elsif ($proto eq "ldap") {
3350 # Fetch ACLs from LDAP
3353 &disconnect_userdb($userdb, $dbh);
3357 # Read from local files
3358 &read_file_cached("$config_directory/$m/$u.acl", \%rv);
3359 if ($remote_user ne $base_remote_user && !defined($_[0])) {
3361 "$config_directory/$m/$remote_user.acl",\%rv);
3365 if ($tconfig{'preload_functions'}) {
3366 &load_theme_library();
3368 if (defined(&theme_get_module_acl)) {
3369 %rv = &theme_get_module_acl($u, $m, \%rv);
3374 =head2 get_group_module_acl(group, [module], [no-default])
3376 Returns the ACL for a Webmin group, in an optional module (which defaults to
3377 the current module).
3380 sub get_group_module_acl
3383 my $m = defined($_[1]) ? $_[1] : &get_module_name();
3384 my $mdir = &module_root_directory($m);
3387 &read_file_cached("$mdir/defaultacl", \%rv);
3390 my $userdb = &get_userdb_string();
3393 # Look for this group in the user/group DB
3394 my ($dbh, $proto) = &connect_userdb($userdb);
3395 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3396 if ($proto eq "mysql" || $proto eq "postgresql") {
3397 # Find the group in the SQL DB
3398 my $cmd = $dbh->prepare(
3399 "select id from webmin_group where name = ?");
3400 $cmd && $cmd->execute($g) ||
3401 &error(&text('egroupdbacl', $dbh->errstr));
3402 my ($id) = $cmd->fetchrow();
3403 $foundindb = 1 if (defined($id));
3406 # Fetch ACLs with SQL
3408 my $cmd = $dbh->prepare(
3409 "select attr,value from webmin_group_acl ".
3410 "where id = ? and module = ?");
3411 $cmd && $cmd->execute($id, $m) ||
3412 &error(&text('egroupdbacl', $dbh->errstr));
3413 while(my ($a, $v) = $cmd->fetchrow()) {
3419 elsif ($proto eq "ldap") {
3420 # Fetch ACLs from LDAP
3423 &disconnect_userdb($userdb, $dbh);
3426 # Read from local files
3427 &read_file_cached("$config_directory/$m/$g.gacl", \%rv);
3429 if (defined(&theme_get_module_acl)) {
3430 %rv = &theme_get_module_acl($g, $m, \%rv);
3435 =head2 save_module_acl(&acl, [user], [module], [never-update-group])
3437 Updates the acl hash for some user and module. The parameters are :
3439 =item acl - Hash reference for the new access control options, or undef to clear
3441 =item user - User to update, defaulting to the current user.
3443 =item module - Module to update, defaulting to the caller.
3445 =item never-update-group - Never update the user's group's ACL
3450 my $u = defined($_[1]) ? $_[1] : $base_remote_user;
3451 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3452 if (!$_[3] && &foreign_check("acl")) {
3453 # Check if this user is a member of a group, and if he gets the
3454 # module from a group. If so, update its ACL as well
3455 &foreign_require("acl", "acl-lib.pl");
3457 foreach my $g (&acl::list_groups()) {
3458 if (&indexof($u, @{$g->{'members'}}) >= 0 &&
3459 &indexof($m, @{$g->{'modules'}}) >= 0) {
3465 &save_group_module_acl($_[0], $group->{'name'}, $m);
3469 my $userdb = &get_userdb_string();
3471 if ($userdb && ($u ne $base_remote_user || $remote_user_proto)) {
3472 # Look for this user in the user/group DB
3473 my ($dbh, $proto) = &connect_userdb($userdb);
3474 ref($dbh) || &error(&text('euserdbacl', $dbh));
3475 if ($proto eq "mysql" || $proto eq "postgresql") {
3476 # Find the user in the SQL DB
3477 my $cmd = $dbh->prepare(
3478 "select id from webmin_user where name = ?");
3479 $cmd && $cmd->execute($u) ||
3480 &error(&text('euserdbacl2', $dbh->errstr));
3481 my ($id) = $cmd->fetchrow();
3482 $foundindb = 1 if (defined($id));
3485 # Replace ACLs for user
3487 my $cmd = $dbh->prepare("delete from webmin_user_acl ".
3488 "where id = ? and module = ?");
3489 $cmd && $cmd->execute($id, $m) ||
3490 &error(&text('euserdbacl', $dbh->errstr));
3493 my $cmd = $dbh->prepare(
3494 "insert into webmin_user_acl ".
3495 "(id,module,attr,value) values (?,?,?,?)");
3496 $cmd || &error(&text('euserdbacl2',
3498 foreach my $a (keys %{$_[0]}) {
3499 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3500 &error(&text('euserdbacl2',
3507 elsif ($proto eq "ldap") {
3508 # Update ACLs in LDAP
3511 &disconnect_userdb($userdb, $dbh);
3515 # Save ACL to local file
3516 if (!-d "$config_directory/$m") {
3517 mkdir("$config_directory/$m", 0755);
3520 &write_file("$config_directory/$m/$u.acl", $_[0]);
3523 &unlink_file("$config_directory/$m/$u.acl");
3528 =head2 save_group_module_acl(&acl, group, [module], [never-update-group])
3530 Updates the acl hash for some group and module. The parameters are :
3532 =item acl - Hash reference for the new access control options.
3534 =item group - Group name to update.
3536 =item module - Module to update, defaulting to the caller.
3538 =item never-update-group - Never update the parent group's ACL
3541 sub save_group_module_acl
3544 my $m = defined($_[2]) ? $_[2] : &get_module_name();
3545 if (!$_[3] && &foreign_check("acl")) {
3546 # Check if this group is a member of a group, and if it gets the
3547 # module from a group. If so, update the parent ACL as well
3548 &foreign_require("acl", "acl-lib.pl");
3550 foreach my $pg (&acl::list_groups()) {
3551 if (&indexof('@'.$g, @{$pg->{'members'}}) >= 0 &&
3552 &indexof($m, @{$pg->{'modules'}}) >= 0) {
3558 &save_group_module_acl($_[0], $group->{'name'}, $m);
3562 my $userdb = &get_userdb_string();
3565 # Look for this group in the user/group DB
3566 my ($dbh, $proto) = &connect_userdb($userdb);
3567 ref($dbh) || &error(&text('egroupdbacl', $dbh));
3568 if ($proto eq "mysql" || $proto eq "postgresql") {
3569 # Find the group in the SQL DB
3570 my $cmd = $dbh->prepare(
3571 "select id from webmin_group where name = ?");
3572 $cmd && $cmd->execute($g) ||
3573 &error(&text('egroupdbacl2', $dbh->errstr));
3574 my ($id) = $cmd->fetchrow();
3575 $foundindb = 1 if (defined($id));
3578 # Replace ACLs for group
3580 my $cmd = $dbh->prepare("delete from webmin_group_acl ".
3581 "where id = ? and module = ?");
3582 $cmd && $cmd->execute($id, $m) ||
3583 &error(&text('egroupdbacl', $dbh->errstr));
3586 my $cmd = $dbh->prepare(
3587 "insert into webmin_group_acl ".
3588 "(id,module,attr,value) values (?,?,?,?)");
3589 $cmd || &error(&text('egroupdbacl2',
3591 foreach my $a (keys %{$_[0]}) {
3592 $cmd->execute($id,$m,$a,$_[0]->{$a}) ||
3593 &error(&text('egroupdbacl2',
3600 elsif ($proto eq "ldap") {
3601 # Update ACLs in LDAP
3604 &disconnect_userdb($userdb, $dbh);
3608 # Save ACL to local file
3609 if (!-d "$config_directory/$m") {
3610 mkdir("$config_directory/$m", 0755);
3613 &write_file("$config_directory/$m/$g.gacl", $_[0]);
3616 &unlink_file("$config_directory/$m/$g.gacl");
3623 This function must be called by all Webmin CGI scripts, either directly or
3624 indirectly via a per-module lib.pl file. It performs a number of initialization
3625 and housekeeping tasks, such as working out the module name, checking that the
3626 current user has access to the module, and populating global variables. Some
3627 of the variables set include :
3629 =item $config_directory - Base Webmin config directory, typically /etc/webmin
3631 =item $var_directory - Base logs directory, typically /var/webmin
3633 =item %config - Per-module configuration.
3635 =item %gconfig - Global configuration.
3637 =item $scriptname - Base name of the current perl script.
3639 =item $module_name - The name of the current module.
3641 =item $module_config_directory - The config directory for this module.
3643 =item $module_config_file - The config file for this module.
3645 =item $module_root_directory - This module's code directory.
3647 =item $webmin_logfile - The detailed logfile for webmin.
3649 =item $remote_user - The actual username used to login to webmin.
3651 =item $base_remote_user - The username whose permissions are in effect.
3653 =item $current_theme - The theme currently in use.
3655 =item $root_directory - The first root directory of this webmin install.
3657 =item @root_directories - All root directories for this webmin install.
3662 # Record first process ID that called this, so we know when it exited to clean
3664 $main::initial_process_id ||= $$;
3666 # Configuration and spool directories
3667 if (!defined($ENV{'WEBMIN_CONFIG'})) {
3668 die "WEBMIN_CONFIG not set";
3670 $config_directory = $ENV{'WEBMIN_CONFIG'};
3671 if (!defined($ENV{'WEBMIN_VAR'})) {
3672 open(VARPATH, "$config_directory/var-path");
3673 chop($var_directory = <VARPATH>);
3677 $var_directory = $ENV{'WEBMIN_VAR'};
3679 $main::http_cache_directory = $ENV{'WEBMIN_VAR'}."/cache";
3680 $main::default_debug_log_file = $ENV{'WEBMIN_VAR'}."/webmin.debug";
3682 if ($ENV{'SESSION_ID'}) {
3683 # Hide this variable from called programs, but keep it for internal use
3684 $main::session_id = $ENV{'SESSION_ID'};
3685 delete($ENV{'SESSION_ID'});
3687 if ($ENV{'REMOTE_PASS'}) {
3688 # Hide the password too
3689 $main::remote_pass = $ENV{'REMOTE_PASS'};
3690 delete($ENV{'REMOTE_PASS'});
3693 if ($> == 0 && $< != 0 && !$ENV{'FOREIGN_MODULE_NAME'}) {
3694 # Looks like we are running setuid, but the real UID hasn't been set.
3695 # Do so now, so that executed programs don't get confused
3700 # Read the webmin global config file. This contains the OS type and version,
3701 # OS specific configuration and global options such as proxy servers
3702 $config_file = "$config_directory/config";
3704 &read_file_cached($config_file, \%gconfig);
3705 $null_file = $gconfig{'os_type'} eq 'windows' ? "NUL" : "/dev/null";
3706 $path_separator = $gconfig{'os_type'} eq 'windows' ? ';' : ':';
3708 # If debugging is enabled, open the debug log
3709 if ($gconfig{'debug_enabled'} && !$main::opened_debug_log++) {
3710 my $dlog = $gconfig{'debug_file'} || $main::default_debug_log_file;
3711 if ($gconfig{'debug_size'}) {
3712 my @st = stat($dlog);
3713 if ($st[7] > $gconfig{'debug_size'}) {
3714 rename($dlog, $dlog.".0");
3717 open(main::DEBUGLOG, ">>$dlog");
3718 $main::opened_debug_log = 1;
3720 if ($gconfig{'debug_what_start'}) {
3721 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
3722 $main::debug_log_start_time = time();
3723 &webmin_debug_log("START", "script=$script_name");
3724 $main::debug_log_start_module = $module_name;
3728 # Set PATH and LD_LIBRARY_PATH
3729 if ($gconfig{'path'}) {
3730 if ($gconfig{'syspath'}) {
3732 $ENV{'PATH'} = $gconfig{'path'};
3736 $ENV{'PATH'} = $gconfig{'path'}.$path_separator.$ENV{'PATH'};
3739 $ENV{$gconfig{'ld_env'}} = $gconfig{'ld_path'} if ($gconfig{'ld_env'});
3741 # Set http_proxy and ftp_proxy environment variables, based on Webmin settings
3742 if ($gconfig{'http_proxy'}) {
3743 $ENV{'http_proxy'} = $gconfig{'http_proxy'};
3745 if ($gconfig{'ftp_proxy'}) {
3746 $ENV{'ftp_proxy'} = $gconfig{'ftp_proxy'};
3748 if ($gconfig{'noproxy'}) {
3749 $ENV{'no_proxy'} = $gconfig{'noproxy'};
3752 # Find all root directories
3754 if (&get_miniserv_config(\%miniserv)) {
3755 @root_directories = ( $miniserv{'root'} );
3756 for($i=0; defined($miniserv{"extraroot_$i"}); $i++) {
3757 push(@root_directories, $miniserv{"extraroot_$i"});
3761 # Work out which module we are in, and read the per-module config file
3762 $0 =~ s/\\/\//g; # Force consistent path on Windows
3763 if (defined($ENV{'FOREIGN_MODULE_NAME'})) {
3764 # In a foreign call - use the module name given
3765 $root_directory = $ENV{'FOREIGN_ROOT_DIRECTORY'};
3766 $module_name = $ENV{'FOREIGN_MODULE_NAME'};
3767 @root_directories = ( $root_directory ) if (!@root_directories);
3769 elsif ($ENV{'SCRIPT_NAME'}) {
3770 my $sn = $ENV{'SCRIPT_NAME'};
3771 $sn =~ s/^$gconfig{'webprefix'}//
3772 if (!$gconfig{'webprefixnoredir'});
3773 if ($sn =~ /^\/([^\/]+)\//) {
3774 # Get module name from CGI path
3777 if ($ENV{'SERVER_ROOT'}) {
3778 $root_directory = $ENV{'SERVER_ROOT'};
3780 elsif ($ENV{'SCRIPT_FILENAME'}) {
3781 $root_directory = $ENV{'SCRIPT_FILENAME'};
3782 $root_directory =~ s/$sn$//;
3784 @root_directories = ( $root_directory ) if (!@root_directories);
3787 # Get root directory from miniserv.conf, and deduce module name from $0
3788 $root_directory = $root_directories[0];
3790 foreach my $r (@root_directories) {
3791 if ($0 =~ /^$r\/([^\/]+)\/[^\/]+$/i) {
3792 # Under a module directory
3797 elsif ($0 =~ /^$root_directory\/[^\/]+$/i) {
3803 &error("Script was not run with full path (failed to find $0 under $root_directory)") if (!$rok);
3806 # Work out of this is a web, command line or cron job
3807 if (!$main::webmin_script_type) {
3808 if ($ENV{'SCRIPT_NAME'}) {
3810 $main::webmin_script_type = 'web';
3813 # Cron jobs have no TTY
3814 if ($gconfig{'os_type'} eq 'windows' ||
3815 open(DEVTTY, ">/dev/tty")) {
3816 $main::webmin_script_type = 'cmd';
3820 $main::webmin_script_type = 'cron';
3825 # Set the umask based on config
3826 if ($gconfig{'umask'} && !$main::umask_already++) {
3827 umask(oct($gconfig{'umask'}));
3830 # If this is a cron job or other background task, set the nice level
3831 if (!$main::nice_already && $main::webmin_script_type eq 'cron') {
3833 if ($gconfig{'nice'}) {
3834 eval 'POSIX::nice($gconfig{\'nice\'});';
3837 # Set IO scheduling class and priority
3838 if ($gconfig{'sclass'} ne '' || $gconfig{'sprio'} ne '') {
3840 $cmd .= " -c ".quotemeta($gconfig{'sclass'})
3841 if ($gconfig{'sclass'} ne '');
3842 $cmd .= " -n ".quotemeta($gconfig{'sprio'})
3843 if ($gconfig{'sprio'} ne '');
3845 &execute_command("$cmd >/dev/null 2>&1");
3848 $main::nice_already++;
3851 my $u = $ENV{'BASE_REMOTE_USER'} || $ENV{'REMOTE_USER'};
3852 $base_remote_user = $u;
3853 $remote_user = $ENV{'REMOTE_USER'};
3855 # Work out if user is definitely in the DB, and if so get his attrs
3856 $remote_user_proto = $ENV{"REMOTE_USER_PROTO"};
3857 %remote_user_attrs = ( );
3858 if ($remote_user_proto) {
3859 my $userdb = &get_userdb_string();
3860 my ($dbh, $proto) = $userdb ? &connect_userdb($userdb) : ( );
3862 if ($proto eq "mysql" || $proto eq "postgresql") {
3863 # Read attrs from SQL
3864 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 = ?");
3865 if ($cmd && $cmd->execute($base_remote_user)) {
3866 while(my ($attr, $value) = $cmd->fetchrow()) {
3867 $remote_user_attrs{$attr} = $value;
3872 elsif ($proto eq "ldap") {
3873 # XXX read attrs from LDAP
3875 &disconnect_userdb($userdb, $dbh);
3880 # Find and load the configuration file for this module
3881 my (@ruinfo, $rgroup);
3882 $module_config_directory = "$config_directory/$module_name";
3883 if (&get_product_name() eq "usermin" &&
3884 -r "$module_config_directory/config.$remote_user") {
3886 $module_config_file = "$module_config_directory/config.$remote_user";
3888 elsif (&get_product_name() eq "usermin" &&
3889 (@ruinfo = getpwnam($remote_user)) &&
3890 ($rgroup = getgrgid($ruinfo[3])) &&
3891 -r "$module_config_directory/config.\@$rgroup") {
3892 # Based on group name
3893 $module_config_file = "$module_config_directory/config.\@$rgroup";
3897 $module_config_file = "$module_config_directory/config";
3900 &read_file_cached($module_config_file, \%config);
3902 # Fix up windows-specific substitutions in values
3903 foreach my $k (keys %config) {
3904 if ($config{$k} =~ /\$\{systemroot\}/) {
3905 my $root = &get_windows_root();
3906 $config{$k} =~ s/\$\{systemroot\}/$root/g;
3911 # Record the initial module
3912 $main::initial_module_name ||= $module_name;
3914 # Set some useful variables
3916 $current_themes = $ENV{'MOBILE_DEVICE'} && defined($gconfig{'mobile_theme'}) ?
3917 $gconfig{'mobile_theme'} :
3918 defined($remote_user_attrs{'theme'}) ?
3919 $remote_user_attrs{'theme'} :
3920 defined($gconfig{'theme_'.$remote_user}) ?
3921 $gconfig{'theme_'.$remote_user} :
3922 defined($gconfig{'theme_'.$base_remote_user}) ?
3923 $gconfig{'theme_'.$base_remote_user} :
3925 @current_themes = split(/\s+/, $current_themes);
3926 $current_theme = $current_themes[0];
3927 @theme_root_directories = map { "$root_directory/$_" } @current_themes;
3928 $theme_root_directory = $theme_root_directories[0];
3929 @theme_configs = ( );
3930 foreach my $troot (@theme_root_directories) {
3932 &read_file_cached("$troot/config", \%onetconfig);
3933 &read_file_cached("$troot/config", \%tconfig);
3934 push(@theme_configs, \%onetconfig);
3936 $tb = defined($tconfig{'cs_header'}) ? "bgcolor=#$tconfig{'cs_header'}" :
3937 defined($gconfig{'cs_header'}) ? "bgcolor=#$gconfig{'cs_header'}" :
3939 $cb = defined($tconfig{'cs_table'}) ? "bgcolor=#$tconfig{'cs_table'}" :
3940 defined($gconfig{'cs_table'}) ? "bgcolor=#$gconfig{'cs_table'}" :
3942 $tb .= ' '.$tconfig{'tb'} if ($tconfig{'tb'});
3943 $cb .= ' '.$tconfig{'cb'} if ($tconfig{'cb'});
3944 if ($tconfig{'preload_functions'}) {
3945 # Force load of theme functions right now, if requested
3946 &load_theme_library();
3948 if ($tconfig{'oofunctions'} && !$main::loaded_theme_oo_library++) {
3949 # Load the theme's Webmin:: package classes
3950 do "$theme_root_directory/$tconfig{'oofunctions'}";
3955 $webmin_logfile = $gconfig{'webmin_log'} ? $gconfig{'webmin_log'}
3956 : "$var_directory/webmin.log";
3958 # Load language strings into %text
3959 my @langs = &list_languages();
3961 if ($gconfig{'acceptlang'}) {
3962 foreach my $a (split(/,/, $ENV{'HTTP_ACCEPT_LANGUAGE'})) {
3963 my ($al) = grep { $_->{'lang'} eq $a } @langs;
3965 $accepted_lang = $al->{'lang'};
3970 $current_lang = $force_lang ? $force_lang :
3971 $accepted_lang ? $accepted_lang :
3972 $remote_user_attrs{'lang'} ? $remote_user_attrs{'lang'} :
3973 $gconfig{"lang_$remote_user"} ? $gconfig{"lang_$remote_user"} :
3974 $gconfig{"lang_$base_remote_user"} ? $gconfig{"lang_$base_remote_user"} :
3975 $gconfig{"lang"} ? $gconfig{"lang"} : $default_lang;
3976 foreach my $l (@langs) {
3977 $current_lang_info = $l if ($l->{'lang'} eq $current_lang);
3979 @lang_order_list = &unique($default_lang,
3980 split(/:/, $current_lang_info->{'fallback'}),
3982 %text = &load_language($module_name);
3983 %text || &error("Failed to determine Webmin root from SERVER_ROOT, SCRIPT_FILENAME or the full command line");
3985 # Get the %module_info for this module
3987 my ($mi) = grep { $_->{'dir'} eq $module_name }
3988 &get_all_module_infos(2);
3989 %module_info = %$mi;
3990 $module_root_directory = &module_root_directory($module_name);
3993 if ($module_name && !$main::no_acl_check &&
3994 !defined($ENV{'FOREIGN_MODULE_NAME'})) {
3995 # Check if the HTTP user can access this module
3996 if (!&foreign_available($module_name)) {
3997 if (!&foreign_check($module_name)) {
3998 &error(&text('emodulecheck',
3999 "<i>$module_info{'desc'}</i>"));
4002 &error(&text('emodule', "<i>$u</i>",
4003 "<i>$module_info{'desc'}</i>"));
4006 $main::no_acl_check++;
4009 # Check the Referer: header for nasty redirects
4010 my @referers = split(/\s+/, $gconfig{'referers'});
4012 if ($ENV{'HTTP_REFERER'} =~/^(http|https|ftp):\/\/([^:\/]+:[^@\/]+@)?([^\/:@]+)/) {
4015 my $http_host = $ENV{'HTTP_HOST'};
4016 $http_host =~ s/:\d+$//;
4017 my $unsafe_index = $unsafe_index_cgi ||
4018 &get_module_variable('$unsafe_index_cgi');
4020 ($ENV{'SCRIPT_NAME'} !~ /^\/(index.cgi)?$/ || $unsafe_index) &&
4021 ($ENV{'SCRIPT_NAME'} !~ /^\/([a-z0-9\_\-]+)\/(index.cgi)?$/i ||
4023 $0 !~ /(session_login|pam_login)\.cgi$/ && !$gconfig{'referer'} &&
4024 $ENV{'MINISERV_CONFIG'} && !$main::no_referers_check &&
4025 $ENV{'HTTP_USER_AGENT'} !~ /^Webmin/i &&
4026 ($referer_site && $referer_site ne $http_host &&
4027 &indexof($referer_site, @referers) < 0 ||
4028 !$referer_site && $gconfig{'referers_none'}) &&
4029 !$trust_unknown_referers &&
4030 !&get_module_variable('$trust_unknown_referers')) {
4031 # Looks like a link from elsewhere .. show an error
4032 &header($text{'referer_title'}, "", undef, 0, 1, 1);
4034 $prot = lc($ENV{'HTTPS'}) eq 'on' ? "https" : "http";
4035 my $url = "<tt>".&html_escape("$prot://$ENV{'HTTP_HOST'}$ENV{'REQUEST_URI'}")."</tt>";
4036 if ($referer_site) {
4038 print &text('referer_warn',
4039 "<tt>".&html_escape($ENV{'HTTP_REFERER'})."</tt>", $url);
4041 print &text('referer_fix1', &html_escape($http_host)),"<p>\n";
4042 print &text('referer_fix2', &html_escape($http_host)),"<p>\n";
4045 # No referer info given
4046 print &text('referer_warn_unknown', $url),"<p>\n";
4047 print &text('referer_fix1u'),"<p>\n";
4048 print &text('referer_fix2u'),"<p>\n";
4052 &footer("/", $text{'index'});
4055 $main::no_referers_check++;
4056 $main::completed_referers_check++;
4058 # Call theme post-init
4059 if (defined(&theme_post_init_config)) {
4060 &theme_post_init_config(@_);
4063 # Record that we have done the calling library in this package
4064 my ($callpkg, $lib) = caller();
4066 $main::done_foreign_require{$callpkg,$lib} = 1;
4068 # If a licence checking is enabled, do it now
4069 if ($gconfig{'licence_module'} && !$main::done_licence_module_check &&
4070 &foreign_check($gconfig{'licence_module'}) &&
4071 -r "$root_directory/$gconfig{'licence_module'}/licence_check.pl") {
4072 my $oldpwd = &get_current_dir();
4073 $main::done_licence_module_check++;
4074 $main::licence_module = $gconfig{'licence_module'};
4075 &foreign_require($main::licence_module, "licence_check.pl");
4076 ($main::licence_status, $main::licence_message) =
4077 &foreign_call($main::licence_module, "check_licence");
4081 # Export global variables to caller
4082 if ($main::export_to_caller) {
4083 foreach my $v ('$config_file', '%gconfig', '$null_file',
4084 '$path_separator', '@root_directories',
4085 '$root_directory', '$module_name',
4086 '$base_remote_user', '$remote_user',
4087 '$remote_user_proto', '%remote_user_attrs',
4088 '$module_config_directory', '$module_config_file',
4089 '%config', '@current_themes', '$current_theme',
4090 '@theme_root_directories', '$theme_root_directory',
4091 '%tconfig','@theme_configs', '$tb', '$cb', '$scriptname',
4092 '$webmin_logfile', '$current_lang',
4093 '$current_lang_info', '@lang_order_list', '%text',
4094 '%module_info', '$module_root_directory') {
4095 my ($vt, $vn) = split('', $v, 2);
4096 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
4103 =head2 load_language([module], [directory])
4105 Returns a hashtable mapping text codes to strings in the appropriate language,
4106 based on the $current_lang global variable, which is in turn set based on
4107 the Webmin user's selection. The optional module parameter tells the function
4108 which module to load strings for, and defaults to the calling module. The
4109 optional directory parameter can be used to load strings from a directory
4112 In regular module development you will never need to call this function
4113 directly, as init_config calls it for you, and places the module's strings
4114 into the %text hash.
4120 my $root = $root_directory;
4121 my $ol = $gconfig{'overlang'};
4122 my ($dir) = ($_[1] || "lang");
4124 # Read global lang files
4125 foreach my $o (@lang_order_list) {
4126 my $ok = &read_file_cached("$root/$dir/$o", \%text);
4127 return () if (!$ok && $o eq $default_lang);
4130 foreach my $o (@lang_order_list) {
4131 &read_file_cached("$root/$ol/$o", \%text);
4134 &read_file_cached("$config_directory/custom-lang", \%text);
4137 # Read module's lang files
4138 my $mdir = &module_root_directory($_[0]);
4139 foreach my $o (@lang_order_list) {
4140 &read_file_cached("$mdir/$dir/$o", \%text);
4143 foreach $o (@lang_order_list) {
4144 &read_file_cached("$mdir/$ol/$o", \%text);
4147 &read_file_cached("$config_directory/$_[0]/custom-lang", \%text);
4149 foreach $k (keys %text) {
4150 $text{$k} =~ s/\$(\{([^\}]+)\}|([A-Za-z0-9\.\-\_]+))/text_subs($2 || $3,\%text)/ge;
4153 if (defined(&theme_load_language)) {
4154 &theme_load_language(\%text, $_[0]);
4159 =head2 text_subs(string)
4161 Used internally by load_language to expand $code substitutions in language
4167 if (substr($_[0], 0, 8) eq "include:") {
4170 open(INCLUDE, substr($_[0], 8));
4178 my $t = $_[1]->{$_[0]};
4179 return defined($t) ? $t : '$'.$_[0];
4183 =head2 text(message, [substitute]+)
4185 Returns a translated message from %text, but with $1, $2, etc.. replaced with
4186 the substitute parameters. This makes it easy to use strings with placeholders
4187 that get replaced with programmatically generated text. For example :
4189 print &text('index_hello', $remote_user),"<p>\n";
4194 my $t = &get_module_variable('%text', 1);
4195 my $rv = exists($t->{$_[0]}) ? $t->{$_[0]} : $text{$_[0]};
4196 for(my $i=1; $i<@_; $i++) {
4197 $rv =~ s/\$$i/$_[$i]/g;
4202 =head2 encode_base64(string)
4204 Encodes a string into base64 format, for use in MIME email or HTTP
4205 authorization headers.
4211 pos($_[0]) = 0; # ensure start at the beginning
4212 while ($_[0] =~ /(.{1,57})/gs) {
4213 $res .= substr(pack('u57', $1), 1)."\n";
4216 $res =~ tr|\` -_|AA-Za-z0-9+/|;
4217 my $padding = (3 - length($_[0]) % 3) % 3;
4218 $res =~ s/.{$padding}$/'=' x $padding/e if ($padding);
4222 =head2 decode_base64(string)
4224 Converts a base64-encoded string into plain text. The opposite of encode_base64.
4231 $str =~ tr|A-Za-z0-9+=/||cd; # remove non-base64 chars
4232 if (length($str) % 4) {
4235 $str =~ s/=+$//; # remove padding
4236 $str =~ tr|A-Za-z0-9+/| -_|; # convert to uuencoded format
4237 while ($str =~ /(.{1,60})/gs) {
4238 my $len = chr(32 + length($1)*3/4); # compute length byte
4239 $res .= unpack("u", $len . $1 ); # uudecode
4244 =head2 get_module_info(module, [noclone], [forcache])
4246 Returns a hash containg details of the given module. Some useful keys are :
4248 =item dir - The module directory, like sendmail.
4250 =item desc - Human-readable description, in the current users' language.
4252 =item version - Optional module version number.
4254 =item os_support - List of supported operating systems and versions.
4256 =item category - Category on Webmin's left menu, like net.
4261 return () if ($_[0] =~ /^\./);
4262 my (%rv, $clone, $o);
4263 my $mdir = &module_root_directory($_[0]);
4264 &read_file_cached("$mdir/module.info", \%rv) || return ();
4266 foreach $o (@lang_order_list) {
4267 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4268 $rv{"longdesc"} = $rv{"longdesc_$o"} if ($rv{"longdesc_$o"});
4270 if ($clone && !$_[1] && $config_directory) {
4271 $rv{'clone'} = $rv{'desc'};
4272 &read_file("$config_directory/$_[0]/clone", \%rv);
4275 my %module_categories;
4276 &read_file_cached("$config_directory/webmin.cats", \%module_categories);
4277 my $pn = &get_product_name();
4278 if (defined($rv{'category_'.$pn})) {
4279 # Can override category for webmin/usermin
4280 $rv{'category'} = $rv{'category_'.$pn};
4282 $rv{'realcategory'} = $rv{'category'};
4283 $rv{'category'} = $module_categories{$_[0]}
4284 if (defined($module_categories{$_[0]}));
4286 # Apply description overrides
4287 $rv{'realdesc'} = $rv{'desc'};
4289 &read_file_cached("$config_directory/webmin.descs", \%descs);
4290 if ($descs{$_[0]." ".$current_lang}) {
4291 $rv{'desc'} = $descs{$_[0]." ".$current_lang};
4293 elsif ($descs{$_[0]}) {
4294 $rv{'desc'} = $descs{$_[0]};
4298 # Apply per-user description overridde
4299 my %gaccess = &get_module_acl(undef, "");
4300 if ($gaccess{'desc_'.$_[0]}) {
4301 $rv{'desc'} = $gaccess{'desc_'.$_[0]};
4305 if ($rv{'longdesc'}) {
4306 # All standard modules have an index.cgi
4307 $rv{'index_link'} = 'index.cgi';
4310 # Call theme-specific override function
4311 if (defined(&theme_get_module_info)) {
4312 %rv = &theme_get_module_info(\%rv, $_[0], $_[1], $_[2]);
4318 =head2 get_all_module_infos(cachemode)
4320 Returns a list contains the information on all modules in this webmin
4321 install, including clones. Uses caching to reduce the number of module.info
4322 files that need to be read. Each element of the array is a hash reference
4323 in the same format as returned by get_module_info. The cache mode flag can be :
4324 0 = read and write, 1 = don't read or write, 2 = read only
4327 sub get_all_module_infos
4331 # Is the cache out of date? (ie. have any of the root's changed?)
4332 my $cache_file = "$config_directory/module.infos.cache";
4334 if (&read_file_cached($cache_file, \%cache)) {
4335 foreach my $r (@root_directories) {
4337 if ($st[9] != $cache{'mtime_'.$r}) {
4347 if ($_[0] != 1 && !$changed && $cache{'lang'} eq $current_lang) {
4348 # Can use existing module.info cache
4350 foreach my $k (keys %cache) {
4351 if ($k =~ /^(\S+) (\S+)$/) {
4352 $mods{$1}->{$2} = $cache{$k};
4355 @rv = map { $mods{$_} } (keys %mods) if (%mods);
4358 # Need to rebuild cache
4360 foreach my $r (@root_directories) {
4362 foreach my $m (readdir(DIR)) {
4363 next if ($m =~ /^(config-|\.)/ || $m =~ /\.(cgi|pl)$/);
4364 my %minfo = &get_module_info($m, 0, 1);
4365 next if (!%minfo || !$minfo{'dir'});
4367 foreach $k (keys %minfo) {
4368 $cache{"${m} ${k}"} = $minfo{$k};
4373 $cache{'mtime_'.$r} = $st[9];
4375 $cache{'lang'} = $current_lang;
4376 &write_file($cache_file, \%cache) if (!$_[0] && $< == 0 && $> == 0);
4379 # Override descriptions for modules for current user
4380 my %gaccess = &get_module_acl(undef, "");
4381 foreach my $m (@rv) {
4382 if ($gaccess{"desc_".$m->{'dir'}}) {
4383 $m->{'desc'} = $gaccess{"desc_".$m->{'dir'}};
4387 # Apply installed flags
4389 &read_file_cached("$config_directory/installed.cache", \%installed);
4390 foreach my $m (@rv) {
4391 $m->{'installed'} = $installed{$m->{'dir'}};
4397 =head2 get_theme_info(theme)
4399 Returns a hash containing a theme's details, taken from it's theme.info file.
4400 Some useful keys are :
4402 =item dir - The theme directory, like blue-theme.
4404 =item desc - Human-readable description, in the current users' language.
4406 =item version - Optional module version number.
4408 =item os_support - List of supported operating systems and versions.
4413 return () if ($_[0] =~ /^\./);
4415 my $tdir = &module_root_directory($_[0]);
4416 &read_file("$tdir/theme.info", \%rv) || return ();
4417 foreach my $o (@lang_order_list) {
4418 $rv{"desc"} = $rv{"desc_$o"} if ($rv{"desc_$o"});
4424 =head2 list_languages
4426 Returns an array of supported languages, taken from Webmin's os_list.txt file.
4427 Each is a hash reference with the following keys :
4429 =item lang - The short language code, like es for Spanish.
4431 =item desc - A human-readable description, in English.
4433 =item charset - An optional character set to use when displaying the language.
4435 =item titles - Set to 1 only if Webmin has title images for the language.
4437 =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.
4442 if (!@main::list_languages_cache) {
4445 open(LANG, "$root_directory/lang_list.txt");
4447 if (/^(\S+)\s+(.*)/) {
4448 my $l = { 'desc' => $2 };
4449 foreach $o (split(/,/, $1)) {
4450 if ($o =~ /^([^=]+)=(.*)$/) {
4454 $l->{'index'} = scalar(@rv);
4455 push(@main::list_languages_cache, $l);
4459 @main::list_languages_cache = sort { $a->{'desc'} cmp $b->{'desc'} }
4460 @main::list_languages_cache;
4462 return @main::list_languages_cache;
4465 =head2 read_env_file(file, &hash)
4467 Similar to Webmin's read_file function, but handles files containing shell
4468 environment variables formatted like :
4473 The file parameter is the full path to the file to read, and hash a Perl hash
4474 ref to read names and values into.
4480 &open_readfile(FILE, $_[0]) || return 0;
4483 if (/^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*"(.*)"/i ||
4484 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*'(.*)'/i ||
4485 /^\s*(export\s*)?([A-Za-z0-9_\.]+)\s*=\s*(.*)/i) {
4493 =head2 write_env_file(file, &hash, [export])
4495 Writes out a hash to a file in name='value' format, suitable for use in a shell
4496 script. The parameters are :
4498 =item file - Full path for a file to write to
4500 =item hash - Hash reference of names and values to write.
4502 =item export - If set to 1, preceed each variable setting with the word 'export'.
4507 my $exp = $_[2] ? "export " : "";
4508 &open_tempfile(FILE, ">$_[0]");
4509 foreach my $k (keys %{$_[1]}) {
4510 my $v = $_[1]->{$k};
4511 if ($v =~ /^\S+$/) {
4512 &print_tempfile(FILE, "$exp$k=$v\n");
4515 &print_tempfile(FILE, "$exp$k=\"$v\"\n");
4518 &close_tempfile(FILE);
4521 =head2 lock_file(filename, [readonly], [forcefile])
4523 Lock a file for exclusive access. If the file is already locked, spin
4524 until it is freed. Uses a .lock file, which is not 100% reliable, but seems
4525 to work OK. The parameters are :
4527 =item filename - File or directory to lock.
4529 =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.
4531 =item forcefile - Force the file to be considered as a real file and not a symlink for Webmin actions logging purposes.
4536 my $realfile = &translate_filename($_[0]);
4537 return 0 if (!$_[0] || defined($main::locked_file_list{$realfile}));
4538 my $no_lock = !&can_lock_file($realfile);
4539 my $lock_tries_count = 0;
4542 if (!$no_lock && open(LOCKING, "$realfile.lock")) {
4547 if ($no_lock || !$pid || !kill(0, $pid) || $pid == $$) {
4550 # Create the .lock file
4551 open(LOCKING, ">$realfile.lock") || return 0;
4552 my $lck = eval "flock(LOCKING, 2+4)";
4554 # Lock of lock file failed! Wait till later
4557 print LOCKING $$,"\n";
4558 eval "flock(LOCKING, 8)";
4561 $main::locked_file_list{$realfile} = int($_[1]);
4562 push(@main::temporary_files, "$realfile.lock");
4563 if (($gconfig{'logfiles'} || $gconfig{'logfullfiles'}) &&
4564 !&get_module_variable('$no_log_file_changes') &&
4566 # Grab a copy of this file for later diffing
4568 $main::locked_file_data{$realfile} = undef;
4570 $main::locked_file_type{$realfile} = 1;
4571 $main::locked_file_data{$realfile} = '';
4573 elsif (!$_[2] && ($lnk = readlink($realfile))) {
4574 $main::locked_file_type{$realfile} = 2;
4575 $main::locked_file_data{$realfile} = $lnk;
4577 elsif (open(ORIGFILE, $realfile)) {
4578 $main::locked_file_type{$realfile} = 0;
4579 $main::locked_file_data{$realfile} = '';
4582 $main::locked_file_data{$realfile} .=$_;
4591 if ($lock_tries_count++ > 5*60) {
4592 # Give up after 5 minutes
4593 &error(&text('elock_tries', "<tt>$realfile</tt>", 5));
4599 =head2 unlock_file(filename)
4601 Release a lock on a file taken out by lock_file. If Webmin actions logging of
4602 file changes is enabled, then at unlock file a diff will be taken between the
4603 old and new contents, and stored under /var/webmin/diffs when webmin_log is
4604 called. This can then be viewed in the Webmin Actions Log module.
4609 my $realfile = &translate_filename($_[0]);
4610 return if (!$_[0] || !defined($main::locked_file_list{$realfile}));
4611 unlink("$realfile.lock") if (&can_lock_file($realfile));
4612 delete($main::locked_file_list{$realfile});
4613 if (exists($main::locked_file_data{$realfile})) {
4614 # Diff the new file with the old
4616 my $lnk = readlink($realfile);
4617 my $type = -d _ ? 1 : $lnk ? 2 : 0;
4618 my $oldtype = $main::locked_file_type{$realfile};
4619 my $new = !defined($main::locked_file_data{$realfile});
4620 if ($new && !-e _) {
4621 # file doesn't exist, and never did! do nothing ..
4623 elsif ($new && $type == 1 || !$new && $oldtype == 1) {
4624 # is (or was) a directory ..
4625 if (-d _ && !defined($main::locked_file_data{$realfile})) {
4626 push(@main::locked_file_diff,
4627 { 'type' => 'mkdir', 'object' => $realfile });
4629 elsif (!-d _ && defined($main::locked_file_data{$realfile})) {
4630 push(@main::locked_file_diff,
4631 { 'type' => 'rmdir', 'object' => $realfile });
4634 elsif ($new && $type == 2 || !$new && $oldtype == 2) {
4635 # is (or was) a symlink ..
4636 if ($lnk && !defined($main::locked_file_data{$realfile})) {
4637 push(@main::locked_file_diff,
4638 { 'type' => 'symlink', 'object' => $realfile,
4641 elsif (!$lnk && defined($main::locked_file_data{$realfile})) {
4642 push(@main::locked_file_diff,
4643 { 'type' => 'unsymlink', 'object' => $realfile,
4644 'data' => $main::locked_file_data{$realfile} });
4646 elsif ($lnk ne $main::locked_file_data{$realfile}) {
4647 push(@main::locked_file_diff,
4648 { 'type' => 'resymlink', 'object' => $realfile,
4653 # is a file, or has changed type?!
4654 my ($diff, $delete_file);
4655 my $type = "modify";
4657 open(NEWFILE, ">$realfile");
4662 if (!defined($main::locked_file_data{$realfile})) {
4665 open(ORIGFILE, ">$realfile.webminorig");
4666 print ORIGFILE $main::locked_file_data{$realfile};
4668 $diff = &backquote_command(
4669 "diff ".quotemeta("$realfile.webminorig")." ".
4670 quotemeta($realfile)." 2>/dev/null");
4671 push(@main::locked_file_diff,
4672 { 'type' => $type, 'object' => $realfile,
4673 'data' => $diff } ) if ($diff);
4674 unlink("$realfile.webminorig");
4675 unlink($realfile) if ($delete_file);
4678 if ($gconfig{'logfullfiles'}) {
4679 # Add file details to list of those to fully log
4680 $main::orig_file_data{$realfile} ||=
4681 $main::locked_file_data{$realfile};
4682 $main::orig_file_type{$realfile} ||=
4683 $main::locked_file_type{$realfile};
4686 delete($main::locked_file_data{$realfile});
4687 delete($main::locked_file_type{$realfile});
4691 =head2 test_lock(file)
4693 Returns 1 if some file is currently locked, 0 if not.
4698 my $realfile = &translate_filename($_[0]);
4699 return 0 if (!$_[0]);
4700 return 1 if (defined($main::locked_file_list{$realfile}));
4701 return 0 if (!&can_lock_file($realfile));
4703 if (open(LOCKING, "$realfile.lock")) {
4708 return $pid && kill(0, $pid);
4711 =head2 unlock_all_files
4713 Unlocks all files locked by the current script.
4716 sub unlock_all_files
4718 foreach $f (keys %main::locked_file_list) {
4723 =head2 can_lock_file(file)
4725 Returns 1 if some file should be locked, based on the settings in the
4726 Webmin Configuration module. For internal use by lock_file only.
4731 if (&is_readonly_mode()) {
4732 return 0; # never lock in read-only mode
4734 elsif ($gconfig{'lockmode'} == 0) {
4737 elsif ($gconfig{'lockmode'} == 1) {
4741 # Check if under any of the directories
4743 foreach my $d (split(/\t+/, $gconfig{'lockdirs'})) {
4744 if (&same_file($d, $_[0]) ||
4745 &is_under_directory($d, $_[0])) {
4749 return $gconfig{'lockmode'} == 2 ? $match : !$match;
4753 =head2 webmin_log(action, type, object, ¶ms, [module], [host, script-on-host, client-ip])
4755 Log some action taken by a user. This is typically called at the end of a
4756 script, once all file changes are complete and all commands run. The
4759 =item action - A short code for the action being performed, like 'create'.
4761 =item type - A code for the type of object the action is performed to, like 'user'.
4763 =item object - A short name for the object, like 'joe' if the Unix user 'joe' was just created.
4765 =item params - A hash ref of additional information about the action.
4767 =item module - Name of the module in which the action was performed, which defaults to the current module.
4769 =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.
4771 =item script-on-host - Script name like create_user.cgi on the host the action was performed on.
4773 =item client-ip - IP address of the browser that performed the action.
4778 return if (!$gconfig{'log'} || &is_readonly_mode());
4779 my $m = $_[4] ? $_[4] : &get_module_name();
4781 if ($gconfig{'logclear'}) {
4782 # check if it is time to clear the log
4783 my @st = stat("$webmin_logfile.time");
4784 my $write_logtime = 0;
4786 if ($st[9]+$gconfig{'logtime'}*60*60 < time()) {
4787 # clear logfile and all diff files
4788 &unlink_file("$ENV{'WEBMIN_VAR'}/diffs");
4789 &unlink_file("$ENV{'WEBMIN_VAR'}/files");
4790 &unlink_file("$ENV{'WEBMIN_VAR'}/annotations");
4791 unlink($webmin_logfile);
4798 if ($write_logtime) {
4799 open(LOGTIME, ">$webmin_logfile.time");
4800 print LOGTIME time(),"\n";
4805 # If an action script directory is defined, call the appropriate scripts
4806 if ($gconfig{'action_script_dir'}) {
4807 my ($action, $type, $object) = ($_[0], $_[1], $_[2]);
4808 my ($basedir) = $gconfig{'action_script_dir'};
4810 for my $dir ($basedir/$type/$action, $basedir/$type, $basedir) {
4813 opendir(DIR, $dir) or die "Can't open $dir: $!";
4814 while (defined($file = readdir(DIR))) {
4815 next if ($file =~ /^\.\.?$/); # skip '.' and '..'
4816 if (-x "$dir/$file") {
4817 # Call a script notifying it of the action
4819 $ENV{'ACTION_MODULE'} = &get_module_name();
4820 $ENV{'ACTION_ACTION'} = $_[0];
4821 $ENV{'ACTION_TYPE'} = $_[1];
4822 $ENV{'ACTION_OBJECT'} = $_[2];
4823 $ENV{'ACTION_SCRIPT'} = $script_name;
4824 foreach my $p (keys %param) {
4825 $ENV{'ACTION_PARAM_'.uc($p)} = $param{$p};
4827 system("$dir/$file", @_,
4828 "<$null_file", ">$null_file", "2>&1");
4836 # should logging be done at all?
4837 return if ($gconfig{'logusers'} && &indexof($base_remote_user,
4838 split(/\s+/, $gconfig{'logusers'})) < 0);
4839 return if ($gconfig{'logmodules'} && &indexof($m,
4840 split(/\s+/, $gconfig{'logmodules'})) < 0);
4844 my @tm = localtime($now);
4845 my $script_name = $0 =~ /([^\/]+)$/ ? $1 : '-';
4846 my $id = sprintf "%d.%d.%d", $now, $$, $main::action_id_count;
4847 $main::action_id_count++;
4848 my $line = sprintf "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s %s \"%s\" \"%s\" \"%s\"",
4849 $id, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
4850 $tm[2], $tm[1], $tm[0],
4851 $remote_user || '-',
4852 $main::session_id || '-',
4853 $_[7] || $ENV{'REMOTE_HOST'} || '-',
4854 $m, $_[5] ? "$_[5]:$_[6]" : $script_name,
4855 $_[0], $_[1] ne '' ? $_[1] : '-', $_[2] ne '' ? $_[2] : '-';
4857 foreach my $k (sort { $a cmp $b } keys %{$_[3]}) {
4858 my $v = $_[3]->{$k};
4864 elsif (ref($v) eq 'ARRAY') {
4868 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4869 $line .= " $k='$vv'";
4873 foreach $vv (split(/\0/, $v)) {
4875 $vv =~ s/(['"\\\r\n\t\%])/sprintf("%%%2.2X",ord($1))/ge;
4876 $line .= " $k='$vv'";
4879 $param{$k} = join(" ", @pv);
4881 open(WEBMINLOG, ">>$webmin_logfile");
4882 print WEBMINLOG $line,"\n";
4884 if ($gconfig{'logperms'}) {
4885 chmod(oct($gconfig{'logperms'}), $webmin_logfile);
4888 chmod(0600, $webmin_logfile);
4891 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4892 # Find and record the changes made to any locked files, or commands run
4894 mkdir("$ENV{'WEBMIN_VAR'}/diffs", 0700);
4895 foreach my $d (@main::locked_file_diff) {
4896 mkdir("$ENV{'WEBMIN_VAR'}/diffs/$id", 0700);
4897 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i");
4898 print DIFFLOG "$d->{'type'} $d->{'object'}\n";
4899 print DIFFLOG $d->{'data'};
4901 if ($d->{'input'}) {
4902 open(DIFFLOG, ">$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4903 print DIFFLOG $d->{'input'};
4906 if ($gconfig{'logperms'}) {
4907 chmod(oct($gconfig{'logperms'}),
4908 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i",
4909 "$ENV{'WEBMIN_VAR'}/diffs/$id/$i.input");
4913 @main::locked_file_diff = undef;
4915 if ($gconfig{'logfullfiles'}) {
4916 # Save the original contents of any modified files
4918 mkdir("$ENV{'WEBMIN_VAR'}/files", 0700);
4919 foreach my $f (keys %main::orig_file_data) {
4920 mkdir("$ENV{'WEBMIN_VAR'}/files/$id", 0700);
4921 open(ORIGLOG, ">$ENV{'WEBMIN_VAR'}/files/$id/$i");
4922 if (!defined($main::orig_file_type{$f})) {
4923 print ORIGLOG -1," ",$f,"\n";
4926 print ORIGLOG $main::orig_file_type{$f}," ",$f,"\n";
4928 print ORIGLOG $main::orig_file_data{$f};
4930 if ($gconfig{'logperms'}) {
4931 chmod(oct($gconfig{'logperms'}),
4932 "$ENV{'WEBMIN_VAR'}/files/$id.$i");
4936 %main::orig_file_data = undef;
4937 %main::orig_file_type = undef;
4941 if ($gconfig{'logsyslog'}) {
4942 eval 'use Sys::Syslog qw(:DEFAULT setlogsock);
4943 openlog(&get_product_name(), "cons,pid,ndelay", "daemon");
4944 setlogsock("inet");';
4946 # Syslog module is installed .. try to convert to a
4947 # human-readable form
4949 my $mod = &get_module_name();
4950 my $mdir = module_root_directory($mod);
4951 if (-r "$mdir/log_parser.pl") {
4952 &foreign_require($mod, "log_parser.pl");
4954 foreach my $k (keys %{$_[3]}) {
4955 my $v = $_[3]->{$k};
4956 if (ref($v) eq 'ARRAY') {
4957 $params{$k} = join("\0", @$v);
4963 $msg = &foreign_call($mod, "parse_webmin_log",
4964 $remote_user, $script_name,
4965 $_[0], $_[1], $_[2], \%params);
4966 $msg =~ s/<[^>]*>//g; # Remove tags
4968 elsif ($_[0] eq "_config_") {
4969 my %wtext = &load_language("webminlog");
4970 $msg = $wtext{'search_config'};
4972 $msg ||= "$_[0] $_[1] $_[2]";
4973 my %info = &get_module_info($m);
4974 eval { syslog("info", "%s", "[$info{'desc'}] $msg"); };
4979 =head2 additional_log(type, object, data, [input])
4981 Records additional log data for an upcoming call to webmin_log, such
4982 as a command that was run or SQL that was executed. Typically you will never
4983 need to call this function directory.
4988 if ($gconfig{'logfiles'} && !&get_module_variable('$no_log_file_changes')) {
4989 push(@main::locked_file_diff,
4990 { 'type' => $_[0], 'object' => $_[1], 'data' => $_[2],
4991 'input' => $_[3] } );
4995 =head2 webmin_debug_log(type, message)
4997 Write something to the Webmin debug log. For internal use only.
5000 sub webmin_debug_log
5002 my ($type, $msg) = @_;
5003 return 0 if (!$main::opened_debug_log);
5004 return 0 if ($gconfig{'debug_no'.$main::webmin_script_type});
5005 if ($gconfig{'debug_modules'}) {
5006 my @dmods = split(/\s+/, $gconfig{'debug_modules'});
5007 return 0 if (&indexof($main::initial_module_name, @dmods) < 0);
5010 my @tm = localtime($now);
5012 "%s [%2.2d/%s/%4.4d %2.2d:%2.2d:%2.2d] %s %s %s %s \"%s\"",
5013 $$, $tm[3], $text{"smonth_".($tm[4]+1)}, $tm[5]+1900,
5014 $tm[2], $tm[1], $tm[0],
5015 $remote_user || "-",
5016 $ENV{'REMOTE_HOST'} || "-",
5017 &get_module_name() || "-",
5020 seek(main::DEBUGLOG, 0, 2);
5021 print main::DEBUGLOG $line."\n";
5025 =head2 system_logged(command)
5027 Just calls the Perl system() function, but also logs the command run.
5032 if (&is_readonly_mode()) {
5033 print STDERR "Vetoing command $_[0]\n";
5036 my @realcmd = ( &translate_command($_[0]), @_[1..$#_] );
5037 my $cmd = join(" ", @realcmd);
5039 if ($cmd =~ s/(\s*&\s*)$//) {
5042 while($cmd =~ s/(\d*)(<|>)((\/(tmp|dev)\S+)|&\d+)\s*$//) { }
5043 $cmd =~ s/^\((.*)\)\s*$/$1/;
5045 &additional_log('exec', undef, $cmd);
5046 return system(@realcmd);
5049 =head2 backquote_logged(command)
5051 Executes a command and returns the output (like `command`), but also logs it.
5054 sub backquote_logged
5056 if (&is_readonly_mode()) {
5058 print STDERR "Vetoing command $_[0]\n";
5061 my $realcmd = &translate_command($_[0]);
5064 if ($cmd =~ s/(\s*&\s*)$//) {
5067 while($cmd =~ s/(\d*)(<|>)((\/(tmp\/.webmin|dev)\S+)|&\d+)\s*$//) { }
5068 $cmd =~ s/^\((.*)\)\s*$/$1/;
5070 &additional_log('exec', undef, $cmd);
5071 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
5075 =head2 backquote_with_timeout(command, timeout, safe?, [maxlines])
5077 Runs some command, waiting at most the given number of seconds for it to
5078 complete, and returns the output. The maxlines parameter sets the number
5079 of lines of output to capture. The safe parameter should be set to 1 if the
5080 command is safe for read-only mode users to run.
5083 sub backquote_with_timeout
5085 my $realcmd = &translate_command($_[0]);
5086 &webmin_debug_log('CMD', "cmd=$realcmd timeout=$_[1]")
5087 if ($gconfig{'debug_what_cmd'});
5089 my $pid = &open_execute_command(OUT, "($realcmd) <$null_file", 1, $_[2]);
5094 my $elapsed = time() - $start;
5095 last if ($elapsed > $_[1]);
5097 vec($rmask, fileno(OUT), 1) = 1;
5098 my $sel = select($rmask, undef, undef, $_[1] - $elapsed);
5099 last if (!$sel || $sel < 0);
5101 last if (!defined($line));
5104 if ($_[3] && $linecount >= $_[3]) {
5109 if (kill('TERM', $pid) && time() - $start >= $_[1]) {
5113 return wantarray ? ($out, $timed_out) : $out;
5116 =head2 backquote_command(command, safe?)
5118 Executes a command and returns the output (like `command`), subject to
5119 command translation. The safe parameter should be set to 1 if the command
5120 is safe for read-only mode users to run.
5123 sub backquote_command
5125 if (&is_readonly_mode() && !$_[1]) {
5126 print STDERR "Vetoing command $_[0]\n";
5130 my $realcmd = &translate_command($_[0]);
5131 &webmin_debug_log('CMD', "cmd=$realcmd") if ($gconfig{'debug_what_cmd'});
5135 =head2 kill_logged(signal, pid, ...)
5137 Like Perl's built-in kill function, but also logs the fact that some process
5138 was killed. On Windows, falls back to calling process.exe to terminate a
5144 return scalar(@_)-1 if (&is_readonly_mode());
5145 &webmin_debug_log('KILL', "signal=$_[0] pids=".join(" ", @_[1..@_-1]))
5146 if ($gconfig{'debug_what_procs'});
5147 &additional_log('kill', $_[0], join(" ", @_[1..@_-1])) if (@_ > 1);
5148 if ($gconfig{'os_type'} eq 'windows') {
5149 # Emulate some kills with process.exe
5150 my $arg = $_[0] eq "KILL" ? "-k" :
5151 $_[0] eq "TERM" ? "-q" :
5152 $_[0] eq "STOP" ? "-s" :
5153 $_[0] eq "CONT" ? "-r" : undef;
5155 foreach my $p (@_[1..@_-1]) {
5157 $ok ||= kill($_[0], $p);
5160 &execute_command("process $arg $p");
5172 =head2 rename_logged(old, new)
5174 Re-names a file and logs the rename. If the old and new files are on different
5175 filesystems, calls mv or the Windows rename function to do the job.
5180 &additional_log('rename', $_[0], $_[1]) if ($_[0] ne $_[1]);
5181 return &rename_file($_[0], $_[1]);
5184 =head2 rename_file(old, new)
5186 Renames a file or directory. If the old and new files are on different
5187 filesystems, calls mv or the Windows rename function to do the job.
5192 if (&is_readonly_mode()) {
5193 print STDERR "Vetoing rename from $_[0] to $_[1]\n";
5196 my $src = &translate_filename($_[0]);
5197 my $dst = &translate_filename($_[1]);
5198 &webmin_debug_log('RENAME', "src=$src dst=$dst")
5199 if ($gconfig{'debug_what_ops'});
5200 my $ok = rename($src, $dst);
5201 if (!$ok && $! !~ /permission/i) {
5202 # Try the mv command, in case this is a cross-filesystem rename
5203 if ($gconfig{'os_type'} eq 'windows') {
5204 # Need to use rename
5205 my $out = &backquote_command("rename ".quotemeta($_[0]).
5206 " ".quotemeta($_[1])." 2>&1");
5208 $! = $out if (!$ok);
5212 my $out = &backquote_command("mv ".quotemeta($_[0]).
5213 " ".quotemeta($_[1])." 2>&1");
5215 $! = $out if (!$ok);
5221 =head2 symlink_logged(src, dest)
5223 Create a symlink, and logs it. Effectively does the same thing as the Perl
5230 my $rv = &symlink_file($_[0], $_[1]);
5231 &unlock_file($_[1]);
5235 =head2 symlink_file(src, dest)
5237 Creates a soft link, unless in read-only mode. Effectively does the same thing
5238 as the Perl symlink function.
5243 if (&is_readonly_mode()) {
5244 print STDERR "Vetoing symlink from $_[0] to $_[1]\n";
5247 my $src = &translate_filename($_[0]);
5248 my $dst = &translate_filename($_[1]);
5249 &webmin_debug_log('SYMLINK', "src=$src dst=$dst")
5250 if ($gconfig{'debug_what_ops'});
5251 return symlink($src, $dst);
5254 =head2 link_file(src, dest)
5256 Creates a hard link, unless in read-only mode. The existing new link file
5257 will be deleted if necessary. Effectively the same as Perl's link function.
5262 if (&is_readonly_mode()) {
5263 print STDERR "Vetoing link from $_[0] to $_[1]\n";
5266 my $src = &translate_filename($_[0]);
5267 my $dst = &translate_filename($_[1]);
5268 &webmin_debug_log('LINK', "src=$src dst=$dst")
5269 if ($gconfig{'debug_what_ops'});
5270 unlink($dst); # make sure link works
5271 return link($src, $dst);
5274 =head2 make_dir(dir, perms, recursive)
5276 Creates a directory and sets permissions on it, unless in read-only mode.
5277 The perms parameter sets the octal permissions to apply, which unlike Perl's
5278 mkdir will really get set. The recursive flag can be set to 1 to have the
5279 function create parent directories too.
5284 my ($dir, $perms, $recur) = @_;
5285 if (&is_readonly_mode()) {
5286 print STDERR "Vetoing directory $dir\n";
5289 $dir = &translate_filename($dir);
5290 my $exists = -d $dir ? 1 : 0;
5291 return 1 if ($exists && $recur); # already exists
5292 &webmin_debug_log('MKDIR', $dir) if ($gconfig{'debug_what_ops'});
5293 my $rv = mkdir($dir, $perms);
5294 if (!$rv && $recur) {
5295 # Failed .. try mkdir -p
5296 my $param = $gconfig{'os_type'} eq 'windows' ? "" : "-p";
5297 my $ex = &execute_command("mkdir $param "."e_path($dir));
5303 chmod($perms, $dir);
5308 =head2 set_ownership_permissions(user, group, perms, file, ...)
5310 Sets the user, group owner and permissions on some files. The parameters are :
5312 =item user - UID or username to change the file owner to. If undef, then the owner is not changed.
5314 =item group - GID or group name to change the file group to. If undef, then the group is set to the user's primary group.
5316 =item perms - Octal permissions set to set on the file. If undef, they are left alone.
5318 =item file - One or more files or directories to modify.
5321 sub set_ownership_permissions
5323 my ($user, $group, $perms, @files) = @_;
5324 if (&is_readonly_mode()) {
5325 print STDERR "Vetoing permission changes on ",join(" ", @files),"\n";
5328 @files = map { &translate_filename($_) } @files;
5329 if ($gconfig{'debug_what_ops'}) {
5330 foreach my $f (@files) {
5331 &webmin_debug_log('PERMS',
5332 "file=$f user=$user group=$group perms=$perms");
5336 if (defined($user)) {
5337 my $uid = $user !~ /^\d+$/ ? getpwnam($user) : $user;
5339 if (defined($group)) {
5340 $gid = $group !~ /^\d+$/ ? getgrnam($group) : $group;
5343 my @uinfo = getpwuid($uid);
5346 $rv = chown($uid, $gid, @files);
5348 if ($rv && defined($perms)) {
5349 $rv = chmod($perms, @files);
5354 =head2 unlink_logged(file, ...)
5356 Like Perl's unlink function, but locks the files beforehand and un-locks them
5357 after so that the deletion is logged by Webmin.
5363 foreach my $f (@_) {
5364 if (!&test_lock($f)) {
5369 my @rv = &unlink_file(@_);
5370 foreach my $f (@_) {
5375 return wantarray ? @rv : $rv[0];
5378 =head2 unlink_file(file, ...)
5380 Deletes some files or directories. Like Perl's unlink function, but also
5381 recursively deletes directories with the rm command if needed.
5386 return 1 if (&is_readonly_mode());
5389 foreach my $f (@_) {
5390 &unflush_file_lines($f);
5391 my $realf = &translate_filename($f);
5392 &webmin_debug_log('UNLINK', $realf) if ($gconfig{'debug_what_ops'});
5394 if (!rmdir($realf)) {
5396 if ($gconfig{'os_type'} eq 'windows') {
5397 # Call del and rmdir commands
5400 my $out = `del /q "$qm" 2>&1`;
5402 $out = `rmdir "$qm" 2>&1`;
5407 my $qm = quotemeta($realf);
5408 $out = `rm -rf $qm 2>&1`;
5417 if (!unlink($realf)) {
5423 return wantarray ? ($rv, $err) : $rv;
5426 =head2 copy_source_dest(source, dest)
5428 Copy some file or directory to a new location. Returns 1 on success, or 0
5429 on failure - also sets $! on failure. If the source is a directory, uses
5430 piped tar commands to copy a whole directory structure including permissions
5434 sub copy_source_dest
5436 return (1, undef) if (&is_readonly_mode());
5437 my ($src, $dst) = @_;
5440 &webmin_debug_log('COPY', "src=$src dst=$dst")
5441 if ($gconfig{'debug_what_ops'});
5442 if ($gconfig{'os_type'} eq 'windows') {
5443 # No tar or cp on windows, so need to use copy command
5447 $out = &backquote_logged("xcopy \"$src\" \"$dst\" /Y /E /I 2>&1");
5450 $out = &backquote_logged("copy /Y \"$src\" \"$dst\" 2>&1");
5458 # A directory .. need to copy with tar command
5459 my @st = stat($src);
5462 &set_ownership_permissions($st[4], $st[5], $st[2], $dst);
5463 $out = &backquote_logged("(cd ".quotemeta($src)." ; tar cf - . | (cd ".quotemeta($dst)." ; tar xf -)) 2>&1");
5470 # Can just copy with cp
5471 my $out = &backquote_logged("cp -p ".quotemeta($src).
5472 " ".quotemeta($dst)." 2>&1");
5478 return wantarray ? ($ok, $err) : $ok;
5481 =head2 remote_session_name(host|&server)
5483 Generates a session ID for some server. For this server, this will always
5484 be an empty string. For a server object it will include the hostname and
5485 port and PID. For a server name, it will include the hostname and PID. For
5489 sub remote_session_name
5491 return ref($_[0]) && $_[0]->{'host'} && $_[0]->{'port'} ?
5492 "$_[0]->{'host'}:$_[0]->{'port'}.$$" :
5493 $_[0] eq "" || ref($_[0]) && $_[0]->{'id'} == 0 ? "" :
5494 ref($_[0]) ? "" : "$_[0].$$";
5497 =head2 remote_foreign_require(server, module, file)
5499 Connects to rpc.cgi on a remote webmin server and have it open a session
5500 to a process that will actually do the require and run functions. This is the
5501 equivalent for foreign_require, but for a remote Webmin system. The server
5502 parameter can either be a hostname of a system registered in the Webmin
5503 Servers Index module, or a hash reference for a system from that module.
5506 sub remote_foreign_require
5508 my $call = { 'action' => 'require',
5511 my $sn = &remote_session_name($_[0]);
5512 if ($remote_session{$sn}) {
5513 $call->{'session'} = $remote_session{$sn};
5516 $call->{'newsession'} = 1;
5518 my $rv = &remote_rpc_call($_[0], $call);
5519 if ($rv->{'session'}) {
5520 $remote_session{$sn} = $rv->{'session'};
5521 $remote_session_server{$sn} = $_[0];
5525 =head2 remote_foreign_call(server, module, function, [arg]*)
5527 Call a function on a remote server. Must have been setup first with
5528 remote_foreign_require for the same server and module. Equivalent to
5529 foreign_call, but with the extra server parameter to specify the remote
5533 sub remote_foreign_call
5535 return undef if (&is_readonly_mode());
5536 my $sn = &remote_session_name($_[0]);
5537 return &remote_rpc_call($_[0], { 'action' => 'call',
5540 'session' => $remote_session{$sn},
5541 'args' => [ @_[3 .. $#_] ] } );
5544 =head2 remote_foreign_check(server, module, [api-only])
5546 Checks if some module is installed and supported on a remote server. Equivilant
5547 to foreign_check, but for the remote Webmin system specified by the server
5551 sub remote_foreign_check
5553 return &remote_rpc_call($_[0], { 'action' => 'check',
5558 =head2 remote_foreign_config(server, module)
5560 Gets the configuration for some module from a remote server, as a hash.
5561 Equivalent to foreign_config, but for a remote system.
5564 sub remote_foreign_config
5566 return &remote_rpc_call($_[0], { 'action' => 'config',
5567 'module' => $_[1] });
5570 =head2 remote_eval(server, module, code)
5572 Evaluates some perl code in the context of a module on a remote webmin server.
5573 The server parameter must be the hostname of a remote system, module must
5574 be a module directory name, and code a string of Perl code to run. This can
5575 only be called after remote_foreign_require for the same server and module.
5580 return undef if (&is_readonly_mode());
5581 my $sn = &remote_session_name($_[0]);
5582 return &remote_rpc_call($_[0], { 'action' => 'eval',
5585 'session' => $remote_session{$sn} });
5588 =head2 remote_write(server, localfile, [remotefile], [remotebasename])
5590 Transfers some local file to another server via Webmin's RPC protocol, and
5591 returns the resulting remote filename. If the remotefile parameter is given,
5592 that is the destination filename which will be used. Otherwise a randomly
5593 selected temporary filename will be used, and returned by the function.
5598 return undef if (&is_readonly_mode());
5600 my $sn = &remote_session_name($_[0]);
5601 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5602 # Copy data over TCP connection
5603 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpwrite',
5605 'name' => $_[3] } );
5607 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5608 &open_socket($serv || "localhost", $rv->[1], TWRITE, \$error);
5609 return &$main::remote_error_handler("Failed to transfer file : $error")
5612 while(read(FILE, $got, 1024) > 0) {
5616 shutdown(TWRITE, 1);
5618 if ($error && $error !~ /^OK/) {
5619 # Got back an error!
5620 return &$main::remote_error_handler("Failed to transfer file : $error");
5626 # Just pass file contents as parameters
5628 while(read(FILE, $got, 1024) > 0) {
5632 return &remote_rpc_call($_[0], { 'action' => 'write',
5635 'session' => $remote_session{$sn} });
5639 =head2 remote_read(server, localfile, remotefile)
5641 Transfers a file from a remote server to this system, using Webmin's RPC
5642 protocol. The server parameter must be the hostname of a system registered
5643 in the Webmin Servers Index module, localfile is the destination path on this
5644 system, and remotefile is the file to fetch from the remote server.
5649 my $sn = &remote_session_name($_[0]);
5650 if (!$_[0] || $remote_server_version{$sn} >= 0.966) {
5651 # Copy data over TCP connection
5652 my $rv = &remote_rpc_call($_[0], { 'action' => 'tcpread',
5653 'file' => $_[2] } );
5655 return &$main::remote_error_handler("Failed to transfer file : $rv->[1]");
5658 my $serv = ref($_[0]) ? $_[0]->{'host'} : $_[0];
5659 &open_socket($serv || "localhost", $rv->[1], TREAD, \$error);
5660 return &$main::remote_error_handler("Failed to transfer file : $error")
5663 open(FILE, ">$_[1]");
5664 while(read(TREAD, $got, 1024) > 0) {
5671 # Just get data as return value
5672 my $d = &remote_rpc_call($_[0], { 'action' => 'read',
5674 'session' => $remote_session{$sn} });
5675 open(FILE, ">$_[1]");
5681 =head2 remote_finished
5683 Close all remote sessions. This happens automatically after a while
5684 anyway, but this function should be called to clean things up faster.
5689 foreach my $sn (keys %remote_session) {
5690 my $server = $remote_session_server{$sn};
5691 &remote_rpc_call($server, { 'action' => 'quit',
5692 'session' => $remote_session{$sn} } );
5693 delete($remote_session{$sn});
5694 delete($remote_session_server{$sn});
5696 foreach $fh (keys %fast_fh_cache) {
5698 delete($fast_fh_cache{$fh});
5702 =head2 remote_error_setup(&function)
5704 Sets a function to be called instead of &error when a remote RPC operation
5705 fails. Useful if you want to have more control over your remote operations.
5708 sub remote_error_setup
5710 $main::remote_error_handler = $_[0] || \&error;
5713 =head2 remote_rpc_call(server, structure)
5715 Calls rpc.cgi on some server and passes it a perl structure (hash,array,etc)
5716 and then reads back a reply structure. This is mainly for internal use only,
5717 and is called by the other remote_* functions.
5723 my $sn = &remote_session_name($_[0]); # Will be undef for local connection
5725 # Server structure was given
5727 $serv->{'user'} || $serv->{'id'} == 0 ||
5728 return &$main::remote_error_handler(
5729 "No Webmin login set for server");
5732 # lookup the server in the webmin servers module if needed
5733 if (!%main::remote_servers_cache) {
5734 &foreign_require("servers", "servers-lib.pl");
5735 foreach $s (&foreign_call("servers", "list_servers")) {
5736 $main::remote_servers_cache{$s->{'host'}} = $s;
5737 $main::remote_servers_cache{$s->{'host'}.":".$s->{'port'}} = $s;
5740 $serv = $main::remote_servers_cache{$_[0]};
5741 $serv || return &$main::remote_error_handler(
5742 "No Webmin Servers entry for $_[0]");
5743 $serv->{'user'} || return &$main::remote_error_handler(
5744 "No login set for server $_[0]");
5746 my $ip = $serv->{'ip'} || $serv->{'host'};
5748 # Work out the username and password
5750 if ($serv->{'sameuser'}) {
5751 $user = $remote_user;
5752 defined($main::remote_pass) || return &$main::remote_error_handler(
5753 "Password for this server is not available");
5754 $pass = $main::remote_pass;
5757 $user = $serv->{'user'};
5758 $pass = $serv->{'pass'};
5761 if ($serv->{'fast'} || !$sn) {
5762 # Make TCP connection call to fastrpc.cgi
5763 if (!$fast_fh_cache{$sn} && $sn) {
5764 # Need to open the connection
5765 my $con = &make_http_connection(
5766 $ip, $serv->{'port'}, $serv->{'ssl'},
5767 "POST", "/fastrpc.cgi");
5768 return &$main::remote_error_handler(
5769 "Failed to connect to $serv->{'host'} : $con")
5771 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5772 &write_http_connection($con, "User-agent: Webmin\r\n");
5773 my $auth = &encode_base64("$user:$pass");
5775 &write_http_connection($con, "Authorization: basic $auth\r\n");
5776 &write_http_connection($con, "Content-length: ",
5777 length($tostr),"\r\n");
5778 &write_http_connection($con, "\r\n");
5779 &write_http_connection($con, $tostr);
5781 # read back the response
5782 my $line = &read_http_connection($con);
5783 $line =~ tr/\r\n//d;
5784 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5785 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5787 $line =~ /^HTTP\/1\..\s+200\s+/ ||
5788 return &$main::remote_error_handler("HTTP error : $line");
5790 $line = &read_http_connection($con);
5791 $line =~ tr/\r\n//d;
5793 $line = &read_http_connection($con);
5794 if ($line =~ /^0\s+(.*)/) {
5795 return &$main::remote_error_handler("RPC error : $1");
5797 elsif ($line =~ /^1\s+(\S+)\s+(\S+)\s+(\S+)/ ||
5798 $line =~ /^1\s+(\S+)\s+(\S+)/) {
5799 # Started ok .. connect and save SID
5800 &close_http_connection($con);
5801 my ($port, $sid, $version, $error) = ($1, $2, $3);
5802 &open_socket($ip, $port, $sid, \$error);
5803 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error")
5805 $fast_fh_cache{$sn} = $sid;
5806 $remote_server_version{$sn} = $version;
5809 while($stuff = &read_http_connection($con)) {
5812 return &$main::remote_error_handler("Bad response from fastrpc.cgi : $line");
5815 elsif (!$fast_fh_cache{$sn}) {
5816 # Open the connection by running fastrpc.cgi locally
5817 pipe(RPCOUTr, RPCOUTw);
5821 open(STDOUT, ">&RPCOUTw");
5825 $ENV{'REQUEST_METHOD'} = 'GET';
5826 $ENV{'SCRIPT_NAME'} = '/fastrpc.cgi';
5827 $ENV{'SERVER_ROOT'} ||= $root_directory;
5829 if ($base_remote_user ne 'root' &&
5830 $base_remote_user ne 'admin') {
5831 # Need to fake up a login for the CGI!
5832 &read_acl(undef, \%acl);
5833 $ENV{'BASE_REMOTE_USER'} =
5834 $ENV{'REMOTE_USER'} =
5835 $acl{'root'} ? 'root' : 'admin';
5837 delete($ENV{'FOREIGN_MODULE_NAME'});
5838 delete($ENV{'FOREIGN_ROOT_DIRECTORY'});
5839 chdir($root_directory);
5840 if (!exec("$root_directory/fastrpc.cgi")) {
5841 print "exec failed : $!\n";
5848 ($line = <RPCOUTr>) =~ tr/\r\n//d;
5852 if ($line =~ /^0\s+(.*)/) {
5853 return &$main::remote_error_handler("RPC error : $2");
5855 elsif ($line =~ /^1\s+(\S+)\s+(\S+)/) {
5856 # Started ok .. connect and save SID
5858 my ($port, $sid, $error) = ($1, $2, undef);
5859 &open_socket("localhost", $port, $sid, \$error);
5860 return &$main::remote_error_handler("Failed to connect to fastrpc.cgi : $error") if ($error);
5861 $fast_fh_cache{$sn} = $sid;
5868 &error("Bad response from fastrpc.cgi : $line");
5871 # Got a connection .. send off the request
5872 my $fh = $fast_fh_cache{$sn};
5873 my $tostr = &serialise_variable($_[1]);
5874 print $fh length($tostr)," $fh\n";
5876 my $rlen = int(<$fh>);
5877 my ($fromstr, $got);
5878 while(length($fromstr) < $rlen) {
5879 return &$main::remote_error_handler("Failed to read from fastrpc.cgi")
5880 if (read($fh, $got, $rlen - length($fromstr)) <= 0);
5883 my $from = &unserialise_variable($fromstr);
5885 return &$main::remote_error_handler("Remote Webmin error");
5887 if (defined($from->{'arv'})) {
5888 return @{$from->{'arv'}};
5891 return $from->{'rv'};
5895 # Call rpc.cgi on remote server
5896 my $tostr = &serialise_variable($_[1]);
5898 my $con = &make_http_connection($ip, $serv->{'port'},
5899 $serv->{'ssl'}, "POST", "/rpc.cgi");
5900 return &$main::remote_error_handler("Failed to connect to $serv->{'host'} : $con") if (!ref($con));
5902 &write_http_connection($con, "Host: $serv->{'host'}\r\n");
5903 &write_http_connection($con, "User-agent: Webmin\r\n");
5904 my $auth = &encode_base64("$user:$pass");
5906 &write_http_connection($con, "Authorization: basic $auth\r\n");
5907 &write_http_connection($con, "Content-length: ",length($tostr),"\r\n");
5908 &write_http_connection($con, "\r\n");
5909 &write_http_connection($con, $tostr);
5911 # read back the response
5912 my $line = &read_http_connection($con);
5913 $line =~ tr/\r\n//d;
5914 if ($line =~ /^HTTP\/1\..\s+401\s+/) {
5915 return &$main::remote_error_handler("Login to RPC server as $user rejected");
5917 $line =~ /^HTTP\/1\..\s+200\s+/ || return &$main::remote_error_handler("RPC HTTP error : $line");
5919 $line = &read_http_connection($con);
5920 $line =~ tr/\r\n//d;
5923 while($line = &read_http_connection($con)) {
5927 my $from = &unserialise_variable($fromstr);
5928 return &$main::remote_error_handler("Invalid RPC login to $serv->{'host'}") if (!$from->{'status'});
5929 if (defined($from->{'arv'})) {
5930 return @{$from->{'arv'}};
5933 return $from->{'rv'};
5938 =head2 remote_multi_callback(&servers, parallel, &function, arg|&args, &returns, &errors, [module, library])
5940 Executes some function in parallel on multiple servers at once. Fills in
5941 the returns and errors arrays respectively. If the module and library
5942 parameters are given, that module is remotely required on the server first,
5943 to check if it is connectable. The parameters are :
5945 =item servers - A list of Webmin system hash references.
5947 =item parallel - Number of parallel operations to perform.
5949 =item function - Reference to function to call for each system.
5951 =item args - Additional parameters to the function.
5953 =item returns - Array ref to place return values into, in same order as servers.
5955 =item errors - Array ref to place error messages into.
5957 =item module - Optional module to require on the remote system first.
5959 =item library - Optional library to require in the module.
5962 sub remote_multi_callback
5964 my ($servs, $parallel, $func, $args, $rets, $errs, $mod, $lib) = @_;
5965 &remote_error_setup(\&remote_multi_callback_error);
5967 # Call the functions
5969 foreach my $g (@$servs) {
5975 $remote_multi_callback_err = undef;
5977 # Require the remote lib
5978 &remote_foreign_require($g->{'host'}, $mod, $lib);
5979 if ($remote_multi_callback_err) {
5980 # Failed .. return error
5981 print $wh &serialise_variable(
5982 [ undef, $remote_multi_callback_err ]);
5988 my $a = ref($args) ? $args->[$p] : $args;
5989 my $rv = &$func($g, $a);
5992 print $wh &serialise_variable(
5993 [ $rv, $remote_multi_callback_err ]);
6001 # Read back the results
6003 foreach my $g (@$servs) {
6007 $errs->[$p] = "Failed to read response from $g->{'host'}";
6010 my $rv = &unserialise_variable($line);
6012 $rets->[$p] = $rv->[0];
6013 $errs->[$p] = $rv->[1];
6018 &remote_error_setup(undef);
6021 sub remote_multi_callback_error
6023 $remote_multi_callback_err = $_[0];
6026 =head2 serialise_variable(variable)
6028 Converts some variable (maybe a scalar, hash ref, array ref or scalar ref)
6029 into a url-encoded string. In the cases of arrays and hashes, it is recursively
6030 called on each member to serialize the entire object.
6033 sub serialise_variable
6035 if (!defined($_[0])) {
6041 $rv = &urlize($_[0]);
6043 elsif ($r eq 'SCALAR') {
6044 $rv = &urlize(${$_[0]});
6046 elsif ($r eq 'ARRAY') {
6047 $rv = join(",", map { &urlize(&serialise_variable($_)) } @{$_[0]});
6049 elsif ($r eq 'HASH') {
6050 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6051 &urlize(&serialise_variable($_[0]->{$_})) }
6054 elsif ($r eq 'REF') {
6055 $rv = &serialise_variable(${$_[0]});
6057 elsif ($r eq 'CODE') {
6062 # An object - treat as a hash
6063 $r = "OBJECT ".&urlize($r);
6064 $rv = join(",", map { &urlize(&serialise_variable($_)).",".
6065 &urlize(&serialise_variable($_[0]->{$_})) }
6068 return ($r ? $r : 'VAL').",".$rv;
6071 =head2 unserialise_variable(string)
6073 Converts a string created by serialise_variable() back into the original
6074 scalar, hash ref, array ref or scalar ref. If the original variable was a Perl
6075 object, the same class is used on this system, if available.
6078 sub unserialise_variable
6080 my @v = split(/,/, $_[0]);
6082 if ($v[0] eq 'VAL') {
6083 @v = split(/,/, $_[0], -1);
6084 $rv = &un_urlize($v[1]);
6086 elsif ($v[0] eq 'SCALAR') {
6087 local $r = &un_urlize($v[1]);
6090 elsif ($v[0] eq 'ARRAY') {
6092 for(my $i=1; $i<@v; $i++) {
6093 push(@$rv, &unserialise_variable(&un_urlize($v[$i])));
6096 elsif ($v[0] eq 'HASH') {
6098 for(my $i=1; $i<@v; $i+=2) {
6099 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6100 &unserialise_variable(&un_urlize($v[$i+1]));
6103 elsif ($v[0] eq 'REF') {
6104 local $r = &unserialise_variable($v[1]);
6107 elsif ($v[0] eq 'UNDEF') {
6110 elsif ($v[0] =~ /^OBJECT\s+(.*)$/) {
6111 # An object hash that we have to re-bless
6114 for(my $i=1; $i<@v; $i+=2) {
6115 $rv->{&unserialise_variable(&un_urlize($v[$i]))} =
6116 &unserialise_variable(&un_urlize($v[$i+1]));
6124 =head2 other_groups(user)
6126 Returns a list of secondary groups a user is a member of, as a list of
6135 while(my @g = getgrent()) {
6136 my @m = split(/\s+/, $g[3]);
6137 push(@rv, $g[2]) if (&indexof($user, @m) >= 0);
6139 endgrent() if ($gconfig{'os_type'} ne 'hpux');
6143 =head2 date_chooser_button(dayfield, monthfield, yearfield)
6145 Returns HTML for a button that pops up a data chooser window. The parameters
6148 =item dayfield - Name of the text field to place the day of the month into.
6150 =item monthfield - Name of the select field to select the month of the year in, indexed from 1.
6152 =item yearfield - Name of the text field to place the year into.
6155 sub date_chooser_button
6157 return &theme_date_chooser_button(@_)
6158 if (defined(&theme_date_chooser_button));
6159 my ($w, $h) = (250, 225);
6160 if ($gconfig{'db_sizedate'}) {
6161 ($w, $h) = split(/x/, $gconfig{'db_sizedate'});
6163 return "<input type=button onClick='window.dfield = form.$_[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";
6166 =head2 help_file(module, file)
6168 Returns the path to a module's help file of some name, typically under the
6169 help directory with a .html extension.
6174 my $mdir = &module_root_directory($_[0]);
6175 my $dir = "$mdir/help";
6176 foreach my $o (@lang_order_list) {
6177 my $lang = "$dir/$_[1].$o.html";
6178 return $lang if (-r $lang);
6180 return "$dir/$_[1].html";
6185 Seeds the random number generator, if not already done in this script. On Linux
6186 this makes use of the current time, process ID and a read from /dev/urandom.
6187 On other systems, only the current time and process ID are used.
6192 if (!$main::done_seed_random) {
6193 if (open(RANDOM, "/dev/urandom")) {
6195 read(RANDOM, $buf, 4);
6197 srand(time() ^ $$ ^ $buf);
6202 $main::done_seed_random = 1;
6206 =head2 disk_usage_kb(directory)
6208 Returns the number of kB used by some directory and all subdirs. Implemented
6209 by calling the C<du -k> command.
6214 my $dir = &translate_filename($_[0]);
6216 my $ex = &execute_command("du -sk ".quotemeta($dir), undef, \$out, undef, 0, 1);
6218 &execute_command("du -s ".quotemeta($dir), undef, \$out, undef, 0, 1);
6220 return $out =~ /^([0-9]+)/ ? $1 : "???";
6223 =head2 recursive_disk_usage(directory, [skip-regexp], [only-regexp])
6225 Returns the number of bytes taken up by all files in some directory and all
6226 sub-directories, by summing up their lengths. The disk_usage_kb is more
6227 reflective of reality, as the filesystem typically pads file sizes to 1k or
6231 sub recursive_disk_usage
6233 my $dir = &translate_filename($_[0]);
6240 my @st = stat($dir);
6246 my @files = readdir(DIR);
6248 foreach my $f (@files) {
6249 next if ($f eq "." || $f eq "..");
6250 next if ($skip && $f =~ /$skip/);
6251 next if ($only && $f !~ /$only/);
6252 $rv += &recursive_disk_usage("$dir/$f", $skip, $only);
6258 =head2 help_search_link(term, [ section, ... ] )
6260 Returns HTML for a link to the man module for searching local and online
6261 docs for various search terms. The term parameter can either be a single
6262 word like 'bind', or a space-separated list of words. This function is typically
6263 used by modules that want to refer users to additional documentation in man
6264 pages or local system doc files.
6267 sub help_search_link
6269 if (&foreign_available("man") && !$tconfig{'nosearch'}) {
6270 my $for = &urlize(shift(@_));
6271 return "<a href='$gconfig{'webprefix'}/man/search.cgi?".
6272 join("&", map { "section=$_" } @_)."&".
6273 "for=$for&exact=1&check=".&get_module_name()."'>".
6274 $text{'helpsearch'}."</a>\n";
6281 =head2 make_http_connection(host, port, ssl, method, page, [&headers])
6283 Opens a connection to some HTTP server, maybe through a proxy, and returns
6284 a handle object. The handle can then be used to send additional headers
6285 and read back a response. If anything goes wrong, returns an error string.
6286 The parameters are :
6288 =item host - Hostname or IP address of the webserver to connect to.
6290 =item port - HTTP port number to connect to.
6292 =item ssl - Set to 1 to connect in SSL mode.
6294 =item method - HTTP method, like GET or POST.
6296 =item page - Page to request on the webserver, like /foo/index.html
6298 =item headers - Array ref of additional HTTP headers, each of which is a 2-element array ref.
6301 sub make_http_connection
6303 my ($host, $port, $ssl, $method, $page, $headers) = @_;
6306 foreach my $h (@$headers) {
6307 $htxt .= $h->[0].": ".$h->[1]."\r\n";
6311 if (&is_readonly_mode()) {
6312 return "HTTP connections not allowed in readonly mode";
6314 my $rv = { 'fh' => time().$$ };
6317 eval "use Net::SSLeay";
6318 $@ && return $text{'link_essl'};
6319 eval "Net::SSLeay::SSLeay_add_ssl_algorithms()";
6320 eval "Net::SSLeay::load_error_strings()";
6321 $rv->{'ssl_ctx'} = Net::SSLeay::CTX_new() ||
6322 return "Failed to create SSL context";
6323 $rv->{'ssl_con'} = Net::SSLeay::new($rv->{'ssl_ctx'}) ||
6324 return "Failed to create SSL connection";
6326 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6327 !&no_proxy($host)) {
6330 &open_socket($1, $2, $rv->{'fh'}, \$error);
6333 my $fh = $rv->{'fh'};
6334 print $fh "CONNECT $host:$port HTTP/1.0\r\n";
6335 if ($gconfig{'proxy_user'}) {
6336 my $auth = &encode_base64(
6337 "$gconfig{'proxy_user'}:".
6338 "$gconfig{'proxy_pass'}");
6339 $auth =~ tr/\r\n//d;
6340 print $fh "Proxy-Authorization: Basic $auth\r\n";
6344 if ($line =~ /^HTTP(\S+)\s+(\d+)\s+(.*)/) {
6345 return "Proxy error : $3" if ($2 != 200);
6348 return "Proxy error : $line";
6353 elsif (!$gconfig{'proxy_fallback'}) {
6354 # Connection to proxy failed - give up
6361 &open_socket($host, $port, $rv->{'fh'}, \$error);
6362 return $error if ($error);
6364 Net::SSLeay::set_fd($rv->{'ssl_con'}, fileno($rv->{'fh'}));
6365 Net::SSLeay::connect($rv->{'ssl_con'}) ||
6366 return "SSL connect() failed";
6367 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6368 Net::SSLeay::write($rv->{'ssl_con'}, $rtxt);
6371 # Plain HTTP request
6373 if ($gconfig{'http_proxy'} =~ /^http:\/\/(\S+):(\d+)/ &&
6374 !&no_proxy($host)) {
6377 &open_socket($1, $2, $rv->{'fh'}, \$error);
6381 my $fh = $rv->{'fh'};
6382 my $rtxt = $method." ".
6383 "http://$host:$port$page HTTP/1.0\r\n";
6384 if ($gconfig{'proxy_user'}) {
6385 my $auth = &encode_base64(
6386 "$gconfig{'proxy_user'}:".
6387 "$gconfig{'proxy_pass'}");
6388 $auth =~ tr/\r\n//d;
6389 $rtxt .= "Proxy-Authorization: Basic $auth\r\n";
6394 elsif (!$gconfig{'proxy_fallback'}) {
6399 # Connecting directly
6401 &open_socket($host, $port, $rv->{'fh'}, \$error);
6402 return $error if ($error);
6403 my $fh = $rv->{'fh'};
6404 my $rtxt = "$method $page HTTP/1.0\r\n".$htxt;
6411 =head2 read_http_connection(&handle, [bytes])
6413 Reads either one line or up to the specified number of bytes from the handle,
6414 originally supplied by make_http_connection.
6417 sub read_http_connection
6421 if ($h->{'ssl_con'}) {
6424 while(($idx = index($h->{'buffer'}, "\n")) < 0) {
6425 # need to read more..
6426 if (!($more = Net::SSLeay::read($h->{'ssl_con'}))) {
6428 $rv = $h->{'buffer'};
6429 delete($h->{'buffer'});
6432 $h->{'buffer'} .= $more;
6434 $rv = substr($h->{'buffer'}, 0, $idx+1);
6435 $h->{'buffer'} = substr($h->{'buffer'}, $idx+1);
6438 if (length($h->{'buffer'})) {
6439 $rv = $h->{'buffer'};
6440 delete($h->{'buffer'});
6443 $rv = Net::SSLeay::read($h->{'ssl_con'}, $_[1]);
6449 read($h->{'fh'}, $rv, $_[1]) > 0 || return undef;
6452 my $fh = $h->{'fh'};
6456 $rv = undef if ($rv eq "");
6460 =head2 write_http_connection(&handle, [data+])
6462 Writes the given data to the given HTTP connection handle.
6465 sub write_http_connection
6468 my $fh = $h->{'fh'};
6470 if ($h->{'ssl_ctx'}) {
6471 foreach my $s (@_) {
6472 my $ok = Net::SSLeay::write($h->{'ssl_con'}, $s);
6473 $allok = 0 if (!$ok);
6477 my $ok = (print $fh @_);
6478 $allok = 0 if (!$ok);
6483 =head2 close_http_connection(&handle)
6485 Closes a connection to an HTTP server, identified by the given handle.
6488 sub close_http_connection
6494 =head2 clean_environment
6496 Deletes any environment variables inherited from miniserv so that they
6497 won't be passed to programs started by webmin. This is useful when calling
6498 programs that check for CGI-related environment variables and modify their
6499 behaviour, and to avoid passing sensitive variables to un-trusted programs.
6502 sub clean_environment
6504 %UNCLEAN_ENV = %ENV;
6505 foreach my $k (keys %ENV) {
6506 if ($k =~ /^(HTTP|VIRTUALSERVER|QUOTA|USERADMIN)_/) {
6510 foreach my $e ('WEBMIN_CONFIG', 'SERVER_NAME', 'CONTENT_TYPE', 'REQUEST_URI',
6511 'PATH_INFO', 'WEBMIN_VAR', 'REQUEST_METHOD', 'GATEWAY_INTERFACE',
6512 'QUERY_STRING', 'REMOTE_USER', 'SERVER_SOFTWARE', 'SERVER_PROTOCOL',
6513 'REMOTE_HOST', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ROOT',
6514 'MINISERV_CONFIG', 'SCRIPT_NAME', 'SERVER_ADMIN', 'CONTENT_LENGTH',
6515 'HTTPS', 'FOREIGN_MODULE_NAME', 'FOREIGN_ROOT_DIRECTORY',
6516 'SCRIPT_FILENAME', 'PATH_TRANSLATED', 'BASE_REMOTE_USER',
6517 'DOCUMENT_REALROOT', 'MINISERV_CONFIG', 'MYSQL_PWD',
6523 =head2 reset_environment
6525 Puts the environment back how it was before clean_environment was callled.
6528 sub reset_environment
6531 foreach my $k (keys %UNCLEAN_ENV) {
6532 $ENV{$k} = $UNCLEAN_ENV{$k};
6534 undef(%UNCLEAN_ENV);
6538 =head2 progress_callback
6540 Never called directly, but useful for passing to &http_download to print
6541 out progress of an HTTP request.
6544 sub progress_callback
6546 if (defined(&theme_progress_callback)) {
6547 # Call the theme override
6548 return &theme_progress_callback(@_);
6552 print $progress_callback_prefix;
6554 $progress_size = $_[1];
6555 $progress_step = int($_[1] / 10);
6556 print &text('progress_size2', $progress_callback_url,
6557 &nice_size($progress_size)),"<br>\n";
6560 print &text('progress_nosize', $progress_callback_url),"<br>\n";
6562 $last_progress_time = $last_progress_size = undef;
6564 elsif ($_[0] == 3) {
6566 my $sp = $progress_callback_prefix.(" " x 5);
6567 if ($progress_size) {
6568 # And we have a size to compare against
6569 my $st = int(($_[1] * 10) / $progress_size);
6570 my $time_now = time();
6571 if ($st != $progress_step ||
6572 $time_now - $last_progress_time > 60) {
6573 # Show progress every 10% or 60 seconds
6574 print $sp,&text('progress_datan', &nice_size($_[1]),
6575 int($_[1]*100/$progress_size)),"<br>\n";
6576 $last_progress_time = $time_now;
6578 $progress_step = $st;
6581 # No total size .. so only show in 100k jumps
6582 if ($_[1] > $last_progress_size+100*1024) {
6583 print $sp,&text('progress_data2n',
6584 &nice_size($_[1])),"<br>\n";
6585 $last_progress_size = $_[1];
6589 elsif ($_[0] == 4) {
6590 # All done downloading
6591 print $progress_callback_prefix,&text('progress_done'),"<br>\n";
6593 elsif ($_[0] == 5) {
6594 # Got new location after redirect
6595 $progress_callback_url = $_[1];
6597 elsif ($_[0] == 6) {
6599 $progress_callback_url = $_[1];
6600 print &text('progress_incache', $progress_callback_url),"<br>\n";
6604 =head2 switch_to_remote_user
6606 Changes the user and group of the current process to that of the unix user
6607 with the same name as the current webmin login, or fails if there is none.
6608 This should be called by Usermin module scripts that only need to run with
6609 limited permissions.
6612 sub switch_to_remote_user
6614 @remote_user_info = $remote_user ? getpwnam($remote_user) :
6616 @remote_user_info || &error(&text('switch_remote_euser', $remote_user));
6617 &create_missing_homedir(\@remote_user_info);
6619 &switch_to_unix_user(\@remote_user_info);
6620 $ENV{'USER'} = $ENV{'LOGNAME'} = $remote_user;
6621 $ENV{'HOME'} = $remote_user_info[7];
6623 # Export global variables to caller
6624 if ($main::export_to_caller) {
6625 my ($callpkg) = caller();
6626 eval "\@${callpkg}::remote_user_info = \@remote_user_info";
6630 =head2 switch_to_unix_user(&user-details)
6632 Switches the current process to the UID and group ID from the given list
6633 of user details, which must be in the format returned by getpwnam.
6636 sub switch_to_unix_user
6639 if (!defined($uinfo->[0])) {
6640 # No username given, so just use given GID
6641 ($(, $)) = ( $uinfo->[3], "$uinfo->[3] $uinfo->[3]" );
6644 # Use all groups from user
6645 ($(, $)) = ( $uinfo->[3],
6646 "$uinfo->[3] ".join(" ", $uinfo->[3],
6647 &other_groups($uinfo->[0])) );
6650 POSIX::setuid($uinfo->[2]);
6652 if ($< != $uinfo->[2] || $> != $uinfo->[2]) {
6653 ($>, $<) = ( $uinfo->[2], $uinfo->[2] );
6657 =head2 eval_as_unix_user(username, &code)
6659 Runs some code fragment with the effective UID and GID switch to that
6660 of the given Unix user, so that file IO takes place with his permissions.
6664 sub eval_as_unix_user
6666 my ($user, $code) = @_;
6667 my @uinfo = getpwnam($user);
6668 if (!scalar(@uinfo)) {
6669 &error("eval_as_unix_user called with invalid user $user");
6671 $) = $uinfo[3]." ".join(" ", $uinfo[3], &other_groups($user));
6675 local $main::error_must_die = 1;
6682 $err =~ s/\s+at\s+(\/\S+)\s+line\s+(\d+)\.?//;
6685 return wantarray ? @rv : $rv[0];
6688 =head2 create_user_config_dirs
6690 Creates per-user config directories and sets $user_config_directory and
6691 $user_module_config_directory to them. Also reads per-user module configs
6692 into %userconfig. This should be called by Usermin module scripts that need
6693 to store per-user preferences or other settings.
6696 sub create_user_config_dirs
6698 return if (!$gconfig{'userconfig'});
6699 my @uinfo = @remote_user_info ? @remote_user_info : getpwnam($remote_user);
6700 return if (!@uinfo || !$uinfo[7]);
6701 &create_missing_homedir(\@uinfo);
6702 $user_config_directory = "$uinfo[7]/$gconfig{'userconfig'}";
6703 if (!-d $user_config_directory) {
6704 mkdir($user_config_directory, 0700) ||
6705 &error("Failed to create $user_config_directory : $!");
6706 if ($< == 0 && $uinfo[2]) {
6707 chown($uinfo[2], $uinfo[3], $user_config_directory);
6710 if (&get_module_name()) {
6711 $user_module_config_directory = $user_config_directory."/".
6713 if (!-d $user_module_config_directory) {
6714 mkdir($user_module_config_directory, 0700) ||
6715 &error("Failed to create $user_module_config_directory : $!");
6716 if ($< == 0 && $uinfo[2]) {
6717 chown($uinfo[2], $uinfo[3], $user_config_directory);
6721 &read_file_cached("$module_root_directory/defaultuconfig",
6723 &read_file_cached("$module_config_directory/uconfig", \%userconfig);
6724 &read_file_cached("$user_module_config_directory/config",
6728 # Export global variables to caller
6729 if ($main::export_to_caller) {
6730 my ($callpkg) = caller();
6731 foreach my $v ('$user_config_directory',
6732 '$user_module_config_directory', '%userconfig') {
6733 my ($vt, $vn) = split('', $v, 2);
6734 eval "${vt}${callpkg}::${vn} = ${vt}${vn}";
6739 =head2 create_missing_homedir(&uinfo)
6741 If auto homedir creation is enabled, create one for this user if needed.
6742 For internal use only.
6745 sub create_missing_homedir
6748 if (!-e $uinfo->[7] && $gconfig{'create_homedir'}) {
6749 # Use has no home dir .. make one
6750 system("mkdir -p ".quotemeta($uinfo->[7]));
6751 chown($uinfo->[2], $uinfo->[3], $uinfo->[7]);
6752 if ($gconfig{'create_homedir_perms'} ne '') {
6753 chmod(oct($gconfig{'create_homedir_perms'}), $uinfo->[7]);
6758 =head2 filter_javascript(text)
6760 Disables all javascript <script>, onClick= and so on tags in the given HTML,
6761 and returns the new HTML. Useful for displaying HTML from an un-trusted source.
6764 sub filter_javascript
6767 $rv =~ s/<\s*script[^>]*>([\000-\377]*?)<\s*\/script\s*>//gi;
6768 $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;
6769 $rv =~ s/(javascript:)/x$1/gi;
6770 $rv =~ s/(vbscript:)/x$1/gi;
6774 =head2 resolve_links(path)
6776 Given a path that may contain symbolic links, returns the real path.
6782 $path =~ s/\/+/\//g;
6783 $path =~ s/\/$// if ($path ne "/");
6784 my @p = split(/\/+/, $path);
6786 for(my $i=0; $i<@p; $i++) {
6787 my $sofar = "/".join("/", @p[0..$i]);
6788 my $lnk = readlink($sofar);
6789 if ($lnk eq $sofar) {
6790 # Link to itself! Cannot do anything more really ..
6793 elsif ($lnk =~ /^\//) {
6794 # Link is absolute..
6795 return &resolve_links($lnk."/".join("/", @p[$i+1 .. $#p]));
6799 return &resolve_links("/".join("/", @p[0..$i-1])."/".$lnk."/".join("/", @p[$i+1 .. $#p]));
6805 =head2 simplify_path(path, bogus)
6807 Given a path, maybe containing elements ".." and "." , convert it to a
6808 clean, absolute form. Returns undef if this is not possible.
6816 my @bits = split(/\/+/, $dir);
6819 foreach my $b (@bits) {
6823 elsif ($b eq "..") {
6825 if (scalar(@fixedbits) == 0) {
6826 # Cannot! Already at root!
6833 push(@fixedbits, $b);
6836 return "/".join('/', @fixedbits);
6839 =head2 same_file(file1, file2)
6841 Returns 1 if two files are actually the same
6846 return 1 if ($_[0] eq $_[1]);
6847 return 0 if ($_[0] !~ /^\// || $_[1] !~ /^\//);
6848 my @stat1 = $stat_cache{$_[0]} ? @{$stat_cache{$_[0]}}
6849 : (@{$stat_cache{$_[0]}} = stat($_[0]));
6850 my @stat2 = $stat_cache{$_[1]} ? @{$stat_cache{$_[1]}}
6851 : (@{$stat_cache{$_[1]}} = stat($_[1]));
6852 return 0 if (!@stat1 || !@stat2);
6853 return $stat1[0] == $stat2[0] && $stat1[1] == $stat2[1];
6856 =head2 flush_webmin_caches
6858 Clears all in-memory and on-disk caches used by Webmin.
6861 sub flush_webmin_caches
6863 undef(%main::read_file_cache);
6864 undef(%main::acl_hash_cache);
6865 undef(%main::acl_array_cache);
6866 undef(%main::has_command_cache);
6867 undef(@main::list_languages_cache);
6868 undef($main::got_list_usermods_cache);
6869 undef(@main::list_usermods_cache);
6870 undef(%main::foreign_installed_cache);
6871 unlink("$config_directory/module.infos.cache");
6872 &get_all_module_infos();
6875 =head2 list_usermods
6877 Returns a list of additional module restrictions. For internal use in
6883 if (!$main::got_list_usermods_cache) {
6884 @main::list_usermods_cache = ( );
6886 open(USERMODS, "$config_directory/usermin.mods");
6888 if (/^([^:]+):(\+|-|):(.*)/) {
6889 push(@main::list_usermods_cache,
6890 [ $1, $2, [ split(/\s+/, $3) ] ]);
6894 $main::got_list_usermods_cache = 1;
6896 return @main::list_usermods_cache;
6899 =head2 available_usermods(&allmods, &usermods)
6901 Returns a list of modules that are available to the given user, based
6902 on usermod additional/subtractions. For internal use by Usermin only.
6905 sub available_usermods
6907 return @{$_[0]} if (!@{$_[1]});
6909 my %mods = map { $_->{'dir'}, 1 } @{$_[0]};
6910 my @uinfo = @remote_user_info;
6911 @uinfo = getpwnam($remote_user) if (!@uinfo);
6912 foreach my $u (@{$_[1]}) {
6914 if ($u->[0] eq "*" || $u->[0] eq $remote_user) {
6917 elsif ($u->[0] =~ /^\@(.*)$/) {
6918 # Check for group membership
6919 my @ginfo = getgrnam($1);
6920 $applies++ if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6921 &indexof($remote_user, split(/\s+/, $ginfo[3])) >= 0));
6923 elsif ($u->[0] =~ /^\//) {
6924 # Check users and groups in file
6926 open(USERFILE, $u->[0]);
6929 if ($_ eq $remote_user) {
6932 elsif (/^\@(.*)$/) {
6933 my @ginfo = getgrnam($1);
6935 if (@ginfo && ($ginfo[2] == $uinfo[3] ||
6936 &indexof($remote_user,
6937 split(/\s+/, $ginfo[3])) >= 0));
6944 if ($u->[1] eq "+") {
6945 map { $mods{$_}++ } @{$u->[2]};
6947 elsif ($u->[1] eq "-") {
6948 map { delete($mods{$_}) } @{$u->[2]};
6952 map { $mods{$_}++ } @{$u->[2]};
6956 return grep { $mods{$_->{'dir'}} } @{$_[0]};
6959 =head2 get_available_module_infos(nocache)
6961 Returns a list of modules available to the current user, based on
6962 operating system support, access control and usermod restrictions. Useful
6963 in themes that need to display a list of modules the user can use.
6964 Each element of the returned array is a hash reference in the same format as
6965 returned by get_module_info.
6968 sub get_available_module_infos
6971 &read_acl(\%acl, \%uacl);
6972 my $risk = $gconfig{'risk_'.$base_remote_user};
6974 foreach my $minfo (&get_all_module_infos($_[0])) {
6975 next if (!&check_os_support($minfo));
6977 # Check module risk level
6978 next if ($risk ne 'high' && $minfo->{'risk'} &&
6979 $minfo->{'risk'} !~ /$risk/);
6983 next if (!$acl{$base_remote_user,$minfo->{'dir'}} &&
6984 !$acl{$base_remote_user,"*"});
6986 next if (&is_readonly_mode() && !$minfo->{'readonly'});
6990 # Check usermod restrictions
6991 my @usermods = &list_usermods();
6992 @rv = sort { $a->{'desc'} cmp $b->{'desc'} }
6993 &available_usermods(\@rv, \@usermods);
6995 # Check RBAC restrictions
6997 foreach my $m (@rv) {
6998 if (&supports_rbac($m->{'dir'}) &&
6999 &use_rbac_module_acl(undef, $m->{'dir'})) {
7000 local $rbacs = &get_rbac_module_acl($remote_user,
7008 # Module or system doesn't support RBAC
7009 push(@rbacrv, $m) if (!$gconfig{'rbacdeny_'.$base_remote_user});
7015 if (defined(&theme_foreign_available)) {
7016 foreach my $m (@rbacrv) {
7017 if (&theme_foreign_available($m->{'dir'})) {
7026 # Check licence module vetos
7028 if ($main::licence_module) {
7029 foreach my $m (@themerv) {
7030 if (&foreign_call($main::licence_module,
7031 "check_module_licence", $m->{'dir'})) {
7043 =head2 get_visible_module_infos(nocache)
7045 Like get_available_module_infos, but excludes hidden modules from the list.
7046 Each element of the returned array is a hash reference in the same format as
7047 returned by get_module_info.
7050 sub get_visible_module_infos
7053 my $pn = &get_product_name();
7054 return grep { !$_->{'hidden'} &&
7055 !$_->{$pn.'_hidden'} } &get_available_module_infos($nocache);
7058 =head2 get_visible_modules_categories(nocache)
7060 Returns a list of Webmin module categories, each of which is a hash ref
7061 with 'code', 'desc' and 'modules' keys. The modules value is an array ref
7062 of modules in the category, in the format returned by get_module_info.
7063 Un-used modules are automatically assigned to the 'unused' category, and
7064 those with no category are put into 'others'.
7067 sub get_visible_modules_categories
7070 my @mods = &get_visible_module_infos($nocache);
7072 if (&get_product_name() eq 'webmin') {
7073 @unmods = grep { $_->{'installed'} eq '0' } @mods;
7074 @mods = grep { $_->{'installed'} ne '0' } @mods;
7076 my %cats = &list_categories(\@mods);
7078 foreach my $c (keys %cats) {
7079 my $cat = { 'code' => $c || 'other',
7080 'desc' => $cats{$c} };
7081 $cat->{'modules'} = [ grep { $_->{'category'} eq $c } @mods ];
7084 @rv = sort { ($b->{'code'} eq "others" ? "" : $b->{'code'}) cmp
7085 ($a->{'code'} eq "others" ? "" : $a->{'code'}) } @rv;
7087 # Add un-installed modules in magic category
7088 my $cat = { 'code' => 'unused',
7089 'desc' => $text{'main_unused'},
7091 'modules' => \@unmods };
7097 =head2 is_under_directory(directory, file)
7099 Returns 1 if the given file is under the specified directory, 0 if not.
7100 Symlinks are taken into account in the file to find it's 'real' location.
7103 sub is_under_directory
7105 my ($dir, $file) = @_;
7106 return 1 if ($dir eq "/");
7107 return 0 if ($file =~ /\.\./);
7108 my $ld = &resolve_links($dir);
7110 return &is_under_directory($ld, $file);
7112 my $lp = &resolve_links($file);
7114 return &is_under_directory($dir, $lp);
7116 return 0 if (length($file) < length($dir));
7117 return 1 if ($dir eq $file);
7119 return substr($file, 0, length($dir)) eq $dir;
7122 =head2 parse_http_url(url, [basehost, baseport, basepage, basessl])
7124 Given an absolute URL, returns the host, port, page and ssl flag components.
7125 Relative URLs can also be parsed, if the base information is provided.
7130 if ($_[0] =~ /^(http|https):\/\/([^:\/]+)(:(\d+))?(\/\S*)?$/) {
7132 my $ssl = $1 eq 'https';
7133 return ($2, $3 ? $4 : $ssl ? 443 : 80, $5 || "/", $ssl);
7139 elsif ($_[0] =~ /^\/\S*$/) {
7140 # A relative to the server URL
7141 return ($_[1], $_[2], $_[0], $_[4]);
7144 # A relative to the directory URL
7146 $page =~ s/[^\/]+$//;
7147 return ($_[1], $_[2], $page.$_[0], $_[4]);
7151 =head2 check_clicks_function
7153 Returns HTML for a JavaScript function called check_clicks that returns
7154 true when first called, but false subsequently. Useful on onClick for
7155 critical buttons. Deprecated, as this method of preventing duplicate actions
7159 sub check_clicks_function
7164 function check_clicks(form)
7171 for(i=0; i<form.length; i++)
7172 form.elements[i].disabled = true;
7181 =head2 load_entities_map
7183 Returns a hash ref containing mappings between HTML entities (like ouml) and
7184 ascii values (like 246). Mainly for internal use.
7187 sub load_entities_map
7189 if (!%entities_map_cache) {
7191 open(EMAP, "$root_directory/entities_map.txt");
7193 if (/^(\d+)\s+(\S+)/) {
7194 $entities_map_cache{$2} = $1;
7199 return \%entities_map_cache;
7202 =head2 entities_to_ascii(string)
7204 Given a string containing HTML entities like ö and 7, replace them
7205 with their ASCII equivalents.
7208 sub entities_to_ascii
7211 my $emap = &load_entities_map();
7212 $str =~ s/&([a-z]+);/chr($emap->{$1})/ge;
7213 $str =~ s/&#(\d+);/chr($1)/ge;
7217 =head2 get_product_name
7219 Returns either 'webmin' or 'usermin', depending on which program the current
7220 module is in. Useful for modules that can be installed into either.
7223 sub get_product_name
7225 return $gconfig{'product'} if (defined($gconfig{'product'}));
7226 return defined($gconfig{'userconfig'}) ? 'usermin' : 'webmin';
7231 Returns the character set for the current language, such as iso-8859-1.
7236 my $charset = defined($gconfig{'charset'}) ? $gconfig{'charset'} :
7237 $current_lang_info->{'charset'} ?
7238 $current_lang_info->{'charset'} : $default_charset;
7242 =head2 get_display_hostname
7244 Returns the system's hostname for UI display purposes. This may be different
7245 from the actual hostname if you administrator has configured it so in the
7246 Webmin Configuration module.
7249 sub get_display_hostname
7251 if ($gconfig{'hostnamemode'} == 0) {
7252 return &get_system_hostname();
7254 elsif ($gconfig{'hostnamemode'} == 3) {
7255 return $gconfig{'hostnamedisplay'};
7258 my $h = $ENV{'HTTP_HOST'};
7260 if ($gconfig{'hostnamemode'} == 2) {
7261 $h =~ s/^(www|ftp|mail)\.//i;
7267 =head2 save_module_config([&config], [modulename])
7269 Saves the configuration for some module. The config parameter is an optional
7270 hash reference of names and values to save, which defaults to the global
7271 %config hash. The modulename parameter is the module to update the config
7272 file, which defaults to the current module.
7275 sub save_module_config
7277 my $c = $_[0] || { &get_module_variable('%config') };
7278 my $m = defined($_[1]) ? $_[1] : &get_module_name();
7279 &write_file("$config_directory/$m/config", $c);
7282 =head2 save_user_module_config([&config], [modulename])
7284 Saves the user's Usermin preferences for some module. The config parameter is
7285 an optional hash reference of names and values to save, which defaults to the
7286 global %userconfig hash. The modulename parameter is the module to update the
7287 config file, which defaults to the current module.
7290 sub save_user_module_config
7292 my $c = $_[0] || { &get_module_variable('%userconfig') };
7293 my $m = $_[1] || &get_module_name();
7294 my $ucd = $user_config_directory;
7296 my @uinfo = @remote_user_info ? @remote_user_info
7297 : getpwnam($remote_user);
7298 return if (!@uinfo || !$uinfo[7]);
7299 $ucd = "$uinfo[7]/$gconfig{'userconfig'}";
7301 &write_file("$ucd/$m/config", $c);
7304 =head2 nice_size(bytes, [min])
7306 Converts a number of bytes into a number followed by a suffix like GB, MB
7307 or kB. Rounding is to two decimal digits. The optional min parameter sets the
7308 smallest units to use - so you could pass 1024*1024 to never show bytes or kB.
7313 my ($units, $uname);
7314 if (abs($_[0]) > 1024*1024*1024*1024 || $_[1] >= 1024*1024*1024*1024) {
7315 $units = 1024*1024*1024*1024;
7318 elsif (abs($_[0]) > 1024*1024*1024 || $_[1] >= 1024*1024*1024) {
7319 $units = 1024*1024*1024;
7322 elsif (abs($_[0]) > 1024*1024 || $_[1] >= 1024*1024) {
7326 elsif (abs($_[0]) > 1024 || $_[1] >= 1024) {
7334 my $sz = sprintf("%.2f", ($_[0]*1.0 / $units));
7336 return $sz." ".$uname;
7339 =head2 get_perl_path
7341 Returns the path to Perl currently in use, such as /usr/bin/perl.
7346 if (open(PERL, "$config_directory/perl-path")) {
7352 return $^X if (-x $^X);
7353 return &has_command("perl");
7356 =head2 get_goto_module([&mods])
7358 Returns the details of a module that the current user should be re-directed
7359 to after logging in, or undef if none. Useful for themes.
7364 my @mods = $_[0] ? @{$_[0]} : &get_visible_module_infos();
7365 if ($gconfig{'gotomodule'}) {
7366 my ($goto) = grep { $_->{'dir'} eq $gconfig{'gotomodule'} } @mods;
7367 return $goto if ($goto);
7369 if (@mods == 1 && $gconfig{'gotoone'}) {
7375 =head2 select_all_link(field, form, [text])
7377 Returns HTML for a 'Select all' link that uses Javascript to select
7378 multiple checkboxes with the same name. The parameters are :
7380 =item field - Name of the checkbox inputs.
7382 =item form - Index of the form on the page.
7384 =item text - Message for the link, defaulting to 'Select all'.
7389 return &theme_select_all_link(@_) if (defined(&theme_select_all_link));
7390 my ($field, $form, $text) = @_;
7392 $text ||= $text{'ui_selall'};
7393 return "<a class='select_all' href='#' onClick='document.forms[$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>";
7396 =head2 select_invert_link(field, form, text)
7398 Returns HTML for an 'Invert selection' link that uses Javascript to invert the
7399 selection on multiple checkboxes with the same name. The parameters are :
7401 =item field - Name of the checkbox inputs.
7403 =item form - Index of the form on the page.
7405 =item text - Message for the link, defaulting to 'Invert selection'.
7408 sub select_invert_link
7410 return &theme_select_invert_link(@_) if (defined(&theme_select_invert_link));
7411 my ($field, $form, $text) = @_;
7413 $text ||= $text{'ui_selinv'};
7414 return "<a class='select_invert' href='#' onClick='document.forms[$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>";
7417 =head2 select_rows_link(field, form, text, &rows)
7419 Returns HTML for a link that uses Javascript to select rows with particular
7420 values for their checkboxes. The parameters are :
7422 =item field - Name of the checkbox inputs.
7424 =item form - Index of the form on the page.
7426 =item text - Message for the link, de
7428 =item rows - Reference to an array of 1 or 0 values, indicating which rows to check.
7431 sub select_rows_link
7433 return &theme_select_rows_link(@_) if (defined(&theme_select_rows_link));
7434 my ($field, $form, $text, $rows) = @_;
7436 my $js = "var sel = { ".join(",", map { "\""."e_escape($_)."\":1" } @$rows)." }; ";
7437 $js .= "for(var i=0; i<document.forms[$form].${field}.length; i++) { var r = document.forms[$form].${field}[i]; r.checked = sel[r.value]; } ";
7438 $js .= "return false;";
7439 return "<a href='#' onClick='$js'>$text</a>";
7442 =head2 check_pid_file(file)
7444 Given a pid file, returns the PID it contains if the process is running.
7449 open(PIDFILE, $_[0]) || return undef;
7450 my $pid = <PIDFILE>;
7452 $pid =~ /^\s*(\d+)/ || return undef;
7453 kill(0, $1) || return undef;
7459 Return the local os-specific library name to this module. For internal use only.
7464 my $mn = &get_module_name();
7465 my $md = &module_root_directory($mn);
7466 if (-r "$md/$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl") {
7467 return "$mn-$gconfig{'os_type'}-$gconfig{'os_version'}-lib.pl";
7469 elsif (-r "$md/$mn-$gconfig{'os_type'}-lib.pl") {
7470 return "$mn-$gconfig{'os_type'}-lib.pl";
7472 elsif (-r "$md/$mn-generic-lib.pl") {
7473 return "$mn-generic-lib.pl";
7480 =head2 module_root_directory(module)
7482 Given a module name, returns its root directory. On a typical Webmin install,
7483 all modules are under the same directory - but it is theoretically possible to
7487 sub module_root_directory
7489 my $d = ref($_[0]) ? $_[0]->{'dir'} : $_[0];
7490 if (@root_directories > 1) {
7491 foreach my $r (@root_directories) {
7497 return "$root_directories[0]/$d";
7500 =head2 list_mime_types
7502 Returns a list of all known MIME types and their extensions, as a list of hash
7503 references with keys :
7505 =item type - The MIME type, like text/plain.
7507 =item exts - A list of extensions, like .doc and .avi.
7509 =item desc - A human-readable description for the MIME type.
7514 if (!@list_mime_types_cache) {
7516 open(MIME, "$root_directory/mime.types");
7520 if (s/#\s*(.*)$//g) {
7523 my ($type, @exts) = split(/\s+/);
7525 push(@list_mime_types_cache, { 'type' => $type,
7532 return @list_mime_types_cache;
7535 =head2 guess_mime_type(filename, [default])
7537 Given a file name like xxx.gif or foo.html, returns a guessed MIME type.
7538 The optional default parameter sets a default type of use if none is found,
7539 which defaults to application/octet-stream.
7544 if ($_[0] =~ /\.([A-Za-z0-9\-]+)$/) {
7546 foreach my $t (&list_mime_types()) {
7547 foreach my $e (@{$t->{'exts'}}) {
7548 return $t->{'type'} if (lc($e) eq lc($ext));
7552 return @_ > 1 ? $_[1] : "application/octet-stream";
7555 =head2 open_tempfile([handle], file, [no-error], [no-tempfile], [safe?])
7557 Opens a file handle for writing to a temporary file, which will only be
7558 renamed over the real file when the handle is closed. This allows critical
7559 files like /etc/shadow to be updated safely, even if writing fails part way
7560 through due to lack of disk space. The parameters are :
7562 =item handle - File handle to open, as you would use in Perl's open function.
7564 =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.
7566 =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 $! with the error code.
7568 =item no-tempfile - If set to 1, writing will be direct to the file instead of using a temporary file.
7570 =item safe - Indicates to users in read-only mode that this write is safe and non-destructive.
7576 # Just getting a temp file
7577 if (!defined($main::open_tempfiles{$_[0]})) {
7578 $_[0] =~ /^(.*)\/(.*)$/ || return $_[0];
7579 my $dir = $1 || "/";
7580 my $tmp = "$dir/$2.webmintmp.$$";
7581 $main::open_tempfiles{$_[0]} = $tmp;
7582 push(@main::temporary_files, $tmp);
7584 return $main::open_tempfiles{$_[0]};
7588 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7589 $fh = &callers_package($fh);
7591 my %gaccess = &get_module_acl(undef, "");
7592 my $db = $gconfig{'debug_what_write'};
7593 if ($file =~ /\r|\n|\0/) {
7594 if ($noerror) { return 0; }
7595 else { &error("Filename contains invalid characters"); }
7597 if (&is_readonly_mode() && $file =~ />/ && !$safe) {
7598 # Read-only mode .. veto all writes
7599 print STDERR "vetoing write to $file\n";
7600 return open($fh, ">$null_file");
7602 elsif ($file =~ /^(>|>>|)nul$/i) {
7603 # Write to Windows null device
7604 &webmin_debug_log($1 eq ">" ? "WRITE" :
7605 $1 eq ">>" ? "APPEND" : "READ", "nul") if ($db);
7607 elsif ($file =~ /^(>|>>)(\/dev\/.*)/ || lc($file) eq "nul") {
7608 # Writes to /dev/null or TTYs don't need to be handled
7609 &webmin_debug_log($1 eq ">" ? "WRITE" : "APPEND", $2) if ($db);
7610 return open($fh, $file);
7612 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && !$notemp) {
7613 &webmin_debug_log("WRITE", $1) if ($db);
7614 # Over-writing a file, via a temp file
7616 $file = &translate_filename($file);
7618 # Open the link target instead
7619 $file = &resolve_links($file);
7622 # Cannot open a directory!
7623 if ($noerror) { return 0; }
7624 else { &error("Cannot write to directory $file"); }
7626 my $tmp = &open_tempfile($file);
7627 my $ex = open($fh, ">$tmp");
7628 if (!$ex && $! =~ /permission/i) {
7629 # Could not open temp file .. try opening actual file
7631 $ex = open($fh, ">$file");
7632 delete($main::open_tempfiles{$file});
7635 $main::open_temphandles{$fh} = $file;
7638 if (!$ex && !$noerror) {
7639 &error(&text("efileopen", $file, $!));
7643 elsif ($file =~ /^>\s*(([a-zA-Z]:)?\/.*)$/ && $notemp) {
7644 # Just writing direct to a file
7645 &webmin_debug_log("WRITE", $1) if ($db);
7647 $file = &translate_filename($file);
7648 my @old_attributes = &get_clear_file_attributes($file);
7649 my $ex = open($fh, ">$file");
7650 &reset_file_attributes($file, \@old_attributes);
7651 $main::open_temphandles{$fh} = $file;
7652 if (!$ex && !$noerror) {
7653 &error(&text("efileopen", $file, $!));
7658 elsif ($file =~ /^>>\s*(([a-zA-Z]:)?\/.*)$/) {
7659 # Appending to a file .. nothing special to do
7660 &webmin_debug_log("APPEND", $1) if ($db);
7662 $file = &translate_filename($file);
7663 my @old_attributes = &get_clear_file_attributes($file);
7664 my $ex = open($fh, ">>$file");
7665 &reset_file_attributes($file, \@old_attributes);
7666 $main::open_temphandles{$fh} = $file;
7667 if (!$ex && !$noerror) {
7668 &error(&text("efileopen", $file, $!));
7673 elsif ($file =~ /^([a-zA-Z]:)?\//) {
7674 # Read mode .. nothing to do here
7675 &webmin_debug_log("READ", $file) if ($db);
7676 $file = &translate_filename($file);
7677 return open($fh, $file);
7679 elsif ($file eq ">" || $file eq ">>") {
7680 my ($package, $filename, $line) = caller;
7681 if ($noerror) { return 0; }
7682 else { &error("Missing file to open at ${package}::${filename} line $line"); }
7685 my ($package, $filename, $line) = caller;
7686 &error("Unsupported file or mode $file at ${package}::${filename} line $line");
7691 =head2 close_tempfile(file|handle)
7693 Copies a temp file to the actual file, assuming that all writes were
7694 successful. The handle must have been one passed to open_tempfile.
7700 my $fh = &callers_package($_[0]);
7702 if (defined($file = $main::open_temphandles{$fh})) {
7704 close($fh) || &error(&text("efileclose", $file, $!));
7705 delete($main::open_temphandles{$fh});
7706 return &close_tempfile($file);
7708 elsif (defined($main::open_tempfiles{$_[0]})) {
7710 &webmin_debug_log("CLOSE", $_[0]) if ($gconfig{'debug_what_write'});
7711 my @st = stat($_[0]);
7712 if (&is_selinux_enabled() && &has_command("chcon")) {
7713 # Set original security context
7714 system("chcon --reference=".quotemeta($_[0]).
7715 " ".quotemeta($main::open_tempfiles{$_[0]}).
7716 " >/dev/null 2>&1");
7718 my @old_attributes = &get_clear_file_attributes($_[0]);
7719 rename($main::open_tempfiles{$_[0]}, $_[0]) || &error("Failed to replace $_[0] with $main::open_tempfiles{$_[0]} : $!");
7721 # Set original permissions and ownership
7722 chmod($st[2], $_[0]);
7723 chown($st[4], $st[5], $_[0]);
7725 &reset_file_attributes($_[0], \@old_attributes);
7726 delete($main::open_tempfiles{$_[0]});
7727 @main::temporary_files = grep { $_ ne $main::open_tempfiles{$_[0]} } @main::temporary_files;
7728 if ($main::open_templocks{$_[0]}) {
7729 &unlock_file($_[0]);
7730 delete($main::open_templocks{$_[0]});
7735 # Must be closing a handle not associated with a file
7741 =head2 print_tempfile(handle, text, ...)
7743 Like the normal print function, but calls &error on failure. Useful when
7744 combined with open_tempfile, to ensure that a criticial file is never
7745 only partially written.
7750 my ($fh, @args) = @_;
7751 $fh = &callers_package($fh);
7752 (print $fh @args) || &error(&text("efilewrite",
7753 $main::open_temphandles{$fh} || $fh, $!));
7756 =head2 is_selinux_enabled
7758 Returns 1 if SElinux is supported on this system and enabled, 0 if not.
7761 sub is_selinux_enabled
7763 if (!defined($main::selinux_enabled_cache)) {
7765 if ($gconfig{'os_type'} !~ /-linux$/) {
7766 # Not on linux, so no way
7767 $main::selinux_enabled_cache = 0;
7769 elsif (&read_env_file("/etc/selinux/config", \%seconfig)) {
7770 # Use global config file
7771 $main::selinux_enabled_cache =
7772 $seconfig{'SELINUX'} eq 'disabled' ||
7773 !$seconfig{'SELINUX'} ? 0 : 1;
7776 # Use selinuxenabled command
7777 #$selinux_enabled_cache =
7778 # system("selinuxenabled >/dev/null 2>&1") ? 0 : 1;
7779 $main::selinux_enabled_cache = 0;
7782 return $main::selinux_enabled_cache;
7785 =head2 get_clear_file_attributes(file)
7787 Finds file attributes that may prevent writing, clears them and returns them
7788 as a list. May call error. Mainly for internal use by open_tempfile and
7792 sub get_clear_file_attributes
7796 if ($gconfig{'chattr'}) {
7797 # Get original immutable bit
7798 my $out = &backquote_command(
7799 "lsattr ".quotemeta($file)." 2>/dev/null");
7801 $out =~ s/\s\S+\n//;
7802 @old_attributes = grep { $_ ne '-' } split(//, $out);
7804 if (&indexof("i", @old_attributes) >= 0) {
7805 my $err = &backquote_logged(
7806 "chattr -i ".quotemeta($file)." 2>&1");
7808 &error("Failed to remove immutable bit on ".
7813 return @old_attributes;
7816 =head2 reset_file_attributes(file, &attributes)
7818 Put back cleared attributes on some file. May call error. Mainly for internal
7819 use by close_tempfile.
7822 sub reset_file_attributes
7824 my ($file, $old_attributes) = @_;
7825 if (&indexof("i", @$old_attributes) >= 0) {
7826 my $err = &backquote_logged(
7827 "chattr +i ".quotemeta($file)." 2>&1");
7829 &error("Failed to restore immutable bit on ".
7835 =head2 cleanup_tempnames
7837 Remove all temporary files generated using transname. Typically only called
7838 internally when a Webmin script exits.
7841 sub cleanup_tempnames
7843 foreach my $t (@main::temporary_files) {
7846 @main::temporary_files = ( );
7849 =head2 open_lock_tempfile([handle], file, [no-error])
7851 Returns a temporary file for writing to some actual file, and also locks it.
7852 Effectively the same as calling lock_file and open_tempfile on the same file,
7853 but calls the unlock for you automatically when it is closed.
7856 sub open_lock_tempfile
7858 my ($fh, $file, $noerror, $notemp, $safe) = @_;
7859 $fh = &callers_package($fh);
7860 my $lockfile = $file;
7861 $lockfile =~ s/^[^\/]*//;
7862 if ($lockfile =~ /^\//) {
7863 $main::open_templocks{$lockfile} = &lock_file($lockfile);
7865 return &open_tempfile($fh, $file, $noerror, $notemp, $safe);
7870 $main::end_exit_status ||= $?;
7871 if ($$ == $main::initial_process_id) {
7872 # Exiting from initial process
7873 &cleanup_tempnames();
7874 if ($gconfig{'debug_what_start'} && $main::debug_log_start_time &&
7875 $main::debug_log_start_module eq &get_module_name()) {
7876 my $len = time() - $main::debug_log_start_time;
7877 &webmin_debug_log("STOP", "runtime=$len");
7878 $main::debug_log_start_time = 0;
7880 if (!$ENV{'SCRIPT_NAME'} &&
7881 $main::initial_module_name eq &get_module_name()) {
7882 # In a command-line script - call the real exit, so that the
7883 # exit status gets properly propogated. In some cases this
7884 # was not happening.
7885 exit($main::end_exit_status);
7890 =head2 month_to_number(month)
7892 Converts a month name like feb to a number like 1.
7897 return $month_to_number_map{lc(substr($_[0], 0, 3))};
7900 =head2 number_to_month(number)
7902 Converts a number like 1 to a month name like Feb.
7907 return ucfirst($number_to_month_map{$_[0]});
7910 =head2 get_rbac_module_acl(user, module)
7912 Returns a hash reference of RBAC overrides ACLs for some user and module.
7913 May return undef if none exist (indicating access denied), or the string *
7914 if full access is granted.
7917 sub get_rbac_module_acl
7919 my ($user, $mod) = @_;
7920 eval "use Authen::SolarisRBAC";
7921 return undef if ($@);
7924 if (Authen::SolarisRBAC::chkauth("webmin.$mod.admin", $user)) {
7925 # Automagic webmin.modulename.admin authorization exists .. allow access
7927 if (!Authen::SolarisRBAC::chkauth("webmin.$mod.config", $user)) {
7928 %rv = ( 'noconfig' => 1 );
7935 open(RBAC, &module_root_directory($mod)."/rbac-mapping");
7939 my ($auths, $acls) = split(/\s+/, $_);
7940 my @auths = split(/,/, $auths);
7942 my ($merge) = ($acls =~ s/^\+//);
7944 if ($auths eq "*") {
7945 # These ACLs apply to all RBAC users.
7946 # Only if there is some that match a specific authorization
7947 # later will they be used though.
7950 # Check each of the RBAC authorizations
7951 foreach my $a (@auths) {
7952 if (!Authen::SolarisRBAC::chkauth($a, $user)) {
7957 $foundany++ if ($gotall);
7960 # Found an RBAC authorization - return the ACLs
7961 return "*" if ($acls eq "*");
7962 my %acl = map { split(/=/, $_, 2) } split(/,/, $acls);
7964 # Just add to current set
7965 foreach my $a (keys %acl) {
7976 return !$foundany ? undef : %rv ? \%rv : undef;
7979 =head2 supports_rbac([module])
7981 Returns 1 if RBAC client support is available, such as on Solaris.
7986 return 0 if ($gconfig{'os_type'} ne 'solaris');
7987 eval "use Authen::SolarisRBAC";
7990 #return 0 if (!-r &module_root_directory($_[0])."/rbac-mapping");
7995 =head2 use_rbac_module_acl(user, module)
7997 Returns 1 if some user should use RBAC to get permissions for a module
8000 sub use_rbac_module_acl
8002 my $u = defined($_[0]) ? $_[0] : $base_remote_user;
8003 my $m = defined($_[1]) ? $_[1] : &get_module_name();
8004 return 1 if ($gconfig{'rbacdeny_'.$u}); # RBAC forced for user
8005 my %access = &get_module_acl($u, $m, 1);
8006 return $access{'rbac'} ? 1 : 0;
8009 =head2 execute_command(command, stdin, stdout, stderr, translate-files?, safe?)
8011 Runs some command, possibly feeding it input and capturing output to the
8012 give files or scalar references. The parameters are :
8014 =item command - Full command to run, possibly including shell meta-characters.
8016 =item stdin - File to read input from, or a scalar ref containing input, or undef if no input should be given.
8018 =item stdout - File to write output to, or a scalar ref into which output should be placed, or undef if the output is to be discarded.
8020 =item stderr - File to write error output to, or a scalar ref into which error output should be placed, or undef if the error output is to be discarded.
8022 =item translate-files - Set to 1 to apply filename translation to any filenames. Usually has no effect.
8024 =item safe - Set to 1 if this command is safe and does not modify the state of the system.
8029 my ($cmd, $stdin, $stdout, $stderr, $trans, $safe) = @_;
8030 if (&is_readonly_mode() && !$safe) {
8031 print STDERR "Vetoing command $_[0]\n";
8035 $cmd = &translate_command($cmd);
8037 # Use ` operator where possible
8038 &webmin_debug_log('CMD', "cmd=$cmd") if ($gconfig{'debug_what_cmd'});
8039 if (!$stdin && ref($stdout) && !$stderr) {
8040 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8041 $$stdout = `$cmd 2>$null_file`;
8044 elsif (!$stdin && ref($stdout) && $stdout eq $stderr) {
8045 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8046 $$stdout = `$cmd 2>&1`;
8049 elsif (!$stdin && !$stdout && !$stderr) {
8050 $cmd = "($cmd)" if ($gconfig{'os_type'} ne 'windows');
8051 return system("$cmd >$null_file 2>$null_file <$null_file");
8055 $| = 1; # needed on some systems to flush before forking
8056 pipe(EXECSTDINr, EXECSTDINw);
8057 pipe(EXECSTDOUTr, EXECSTDOUTw);
8058 pipe(EXECSTDERRr, EXECSTDERRw);
8060 if (!($pid = fork())) {
8064 open(STDIN, "<&EXECSTDINr");
8065 open(STDOUT, ">&EXECSTDOUTw");
8066 if (ref($stderr) && $stderr eq $stdout) {
8067 open(STDERR, ">&EXECSTDOUTw");
8070 open(STDERR, ">&EXECSTDERRw");
8077 my $fullcmd = "($cmd)";
8078 if ($stdin && !ref($stdin)) {
8079 $fullcmd .= " <$stdin";
8081 if ($stdout && !ref($stdout)) {
8082 $fullcmd .= " >$stdout";
8084 if ($stderr && !ref($stderr)) {
8085 if ($stderr eq $stdout) {
8086 $fullcmd .= " 2>&1";
8089 $fullcmd .= " 2>$stderr";
8092 if ($gconfig{'os_type'} eq 'windows') {
8096 exec("/bin/sh", "-c", $fullcmd);
8098 print "Exec failed : $!\n";
8105 # Feed input and capture output
8107 if ($stdin && ref($stdin)) {
8108 print EXECSTDINw $$stdin;
8111 if ($stdout && ref($stdout)) {
8113 while(<EXECSTDOUTr>) {
8118 if ($stderr && ref($stderr) && $stderr ne $stdout) {
8120 while(<EXECSTDERRr>) {
8131 =head2 open_readfile(handle, file)
8133 Opens some file for reading. Returns 1 on success, 0 on failure. Pretty much
8134 exactly the same as Perl's open function.
8139 my ($fh, $file) = @_;
8140 $fh = &callers_package($fh);
8141 my $realfile = &translate_filename($file);
8142 &webmin_debug_log('READ', $file) if ($gconfig{'debug_what_read'});
8143 return open($fh, "<".$realfile);
8146 =head2 open_execute_command(handle, command, output?, safe?)
8148 Runs some command, with the specified file handle set to either write to it if
8149 in-or-out is set to 0, or read to it if output is set to 1. The safe flag
8150 indicates if the command modifies the state of the system or not.
8153 sub open_execute_command
8155 my ($fh, $cmd, $mode, $safe) = @_;
8156 $fh = &callers_package($fh);
8157 my $realcmd = &translate_command($cmd);
8158 if (&is_readonly_mode() && !$safe) {
8159 # Don't actually run it
8160 print STDERR "vetoing command $cmd\n";
8163 return open($fh, ">$null_file");
8166 return open($fh, $null_file);
8170 &webmin_debug_log('CMD', "cmd=$realcmd mode=$mode")
8171 if ($gconfig{'debug_what_cmd'});
8173 return open($fh, "| $cmd");
8175 elsif ($mode == 1) {
8176 return open($fh, "$cmd 2>$null_file |");
8178 elsif ($mode == 2) {
8179 return open($fh, "$cmd 2>&1 |");
8183 =head2 translate_filename(filename)
8185 Applies all relevant registered translation functions to a filename. Mostly
8186 for internal use, and typically does nothing.
8189 sub translate_filename
8191 my ($realfile) = @_;
8192 my @funcs = grep { $_->[0] eq &get_module_name() ||
8193 !defined($_->[0]) } @main::filename_callbacks;
8194 foreach my $f (@funcs) {
8196 $realfile = &$func($realfile, @{$f->[2]});
8201 =head2 translate_command(filename)
8203 Applies all relevant registered translation functions to a command. Mostly
8204 for internal use, and typically does nothing.
8207 sub translate_command
8210 my @funcs = grep { $_->[0] eq &get_module_name() ||
8211 !defined($_->[0]) } @main::command_callbacks;
8212 foreach my $f (@funcs) {
8214 $realcmd = &$func($realcmd, @{$f->[2]});
8219 =head2 register_filename_callback(module|undef, &function, &args)
8221 Registers some function to be called when the specified module (or all
8222 modules) tries to open a file for reading and writing. The function must
8223 return the actual file to open. This allows you to override which files
8224 other code actually operates on, via the translate_filename function.
8227 sub register_filename_callback
8229 my ($mod, $func, $args) = @_;
8230 push(@main::filename_callbacks, [ $mod, $func, $args ]);
8233 =head2 register_command_callback(module|undef, &function, &args)
8235 Registers some function to be called when the specified module (or all
8236 modules) tries to execute a command. The function must return the actual
8237 command to run. This allows you to override which commands other other code
8238 actually runs, via the translate_command function.
8241 sub register_command_callback
8243 my ($mod, $func, $args) = @_;
8244 push(@main::command_callbacks, [ $mod, $func, $args ]);
8247 =head2 capture_function_output(&function, arg, ...)
8249 Captures output that some function prints to STDOUT, and returns it. Useful
8250 for functions outside your control that print data when you really want to
8251 manipulate it before output.
8254 sub capture_function_output
8256 my ($func, @args) = @_;
8257 socketpair(SOCKET2, SOCKET1, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
8258 my $old = select(SOCKET1);
8259 my @rv = &$func(@args);
8268 return wantarray ? ($out, \@rv) : $out;
8271 =head2 capture_function_output_tempfile(&function, arg, ...)
8273 Behaves the same as capture_function_output, but uses a temporary file
8274 to avoid buffer full problems.
8277 sub capture_function_output_tempfile
8279 my ($func, @args) = @_;
8280 my $temp = &transname();
8281 open(BUFFER, ">$temp");
8282 my $old = select(BUFFER);
8283 my @rv = &$func(@args);
8286 my $out = &read_file_contents($temp);
8287 &unlink_file($temp);
8288 return wantarray ? ($out, \@rv) : $out;
8291 =head2 modules_chooser_button(field, multiple, [form])
8293 Returns HTML for a button for selecting one or many Webmin modules.
8294 field - Name of the HTML field to place the module names into.
8295 multiple - Set to 1 if multiple modules can be selected.
8296 form - Index of the form on the page.
8299 sub modules_chooser_button
8301 return &theme_modules_chooser_button(@_)
8302 if (defined(&theme_modules_chooser_button));
8303 my $form = defined($_[2]) ? $_[2] : 0;
8304 my $w = $_[1] ? 700 : 500;
8306 if ($_[1] && $gconfig{'db_sizemodules'}) {
8307 ($w, $h) = split(/x/, $gconfig{'db_sizemodules'});
8309 elsif (!$_[1] && $gconfig{'db_sizemodule'}) {
8310 ($w, $h) = split(/x/, $gconfig{'db_sizemodule'});
8312 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";
8315 =head2 substitute_template(text, &hash)
8317 Given some text and a hash reference, for each ocurrance of $FOO or ${FOO} in
8318 the text replaces it with the value of the hash key foo. Also supports blocks
8319 like ${IF-FOO} ... ${ENDIF-FOO}, whose contents are only included if foo is
8320 non-zero, and ${IF-FOO} ... ${ELSE-FOO} ... ${ENDIF-FOO}.
8323 sub substitute_template
8325 # Add some extra fixed parameters to the hash
8326 my %hash = %{$_[1]};
8327 $hash{'hostname'} = &get_system_hostname();
8328 $hash{'webmin_config'} = $config_directory;
8329 $hash{'webmin_etc'} = $config_directory;
8330 $hash{'module_config'} = &get_module_variable('$module_config_directory');
8331 $hash{'webmin_var'} = $var_directory;
8333 # Add time-based parameters, for use in DNS
8334 $hash{'current_time'} = time();
8335 my @tm = localtime($hash{'current_time'});
8336 $hash{'current_year'} = $tm[5]+1900;
8337 $hash{'current_month'} = sprintf("%2.2d", $tm[4]+1);
8338 $hash{'current_day'} = sprintf("%2.2d", $tm[3]);
8339 $hash{'current_hour'} = sprintf("%2.2d", $tm[2]);
8340 $hash{'current_minute'} = sprintf("%2.2d", $tm[1]);
8341 $hash{'current_second'} = sprintf("%2.2d", $tm[0]);
8343 # Actually do the substition
8345 foreach my $s (keys %hash) {
8346 next if ($s eq ''); # Prevent just $ from being subbed
8349 $rv =~ s/\$\{\Q$us\E\}/$sv/g;
8350 $rv =~ s/\$\Q$us\E/$sv/g;
8352 # Replace ${IF}..${ELSE}..${ENDIF} block with first value,
8353 # and ${IF}..${ENDIF} with value
8354 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8355 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$2/g;
8357 # Replace $IF..$ELSE..$ENDIF block with first value,
8358 # and $IF..$ENDIF with value
8359 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8360 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$2/g;
8362 # Replace ${IFEQ}..${ENDIFEQ} block with first value if
8363 # matching, nothing if not
8364 $rv =~ s/\$\{IFEQ-\Q$us\E-\Q$sv\E\}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-\Q$sv\E\}(\n?)/$2/g;
8365 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8367 # Replace $IFEQ..$ENDIFEQ block with first value if
8368 # matching, nothing if not
8369 $rv =~ s/\$IFEQ-\Q$us\E-\Q$sv\E(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\Q$sv\E(\n?)/$2/g;
8370 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8373 # Replace ${IF}..${ELSE}..${ENDIF} block with second value,
8374 # and ${IF}..${ENDIF} with nothing
8375 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ELSE-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)/$4/g;
8376 $rv =~ s/\$\{IF-\Q$us\E\}(\n?)([\000-\377]*?)\$\{ENDIF-\Q$us\E\}(\n?)//g;
8378 # Replace $IF..$ELSE..$ENDIF block with second value,
8379 # and $IF..$ENDIF with nothing
8380 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ELSE-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)/$4/g;
8381 $rv =~ s/\$IF-\Q$us\E(\n?)([\000-\377]*?)\$ENDIF-\Q$us\E(\n?)//g;
8383 # Replace ${IFEQ}..${ENDIFEQ} block with nothing
8384 $rv =~ s/\$\{IFEQ-\Q$us\E-[^\}]+}(\n?)([\000-\377]*?)\$\{ENDIFEQ-\Q$us\E-[^\}]+\}(\n?)//g;
8385 $rv =~ s/\$IFEQ-\Q$us\E-\S+(\n?)([\000-\377]*?)\$ENDIFEQ-\Q$us\E-\S+(\n?)//g;
8389 # Now assume any $IF blocks whose variables are not present in the hash
8390 # evaluate to false.
8391 # $IF...$ELSE x $ENDIF => x
8392 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ELSE\-\1\}(.*?)\$\{ENDIF\-\1\}/$2/gs;
8393 # $IF...x...$ENDIF => (nothing)
8394 $rv =~ s/\$\{IF\-([A-Z]+)\}.*?\$\{ENDIF\-\1\}//gs;
8395 # ${var} => (nothing)
8396 $rv =~ s/\$\{[A-Z]+\}//g;
8401 =head2 running_in_zone
8403 Returns 1 if the current Webmin instance is running in a Solaris zone. Used to
8404 disable module and features that are not appropriate, like those that modify
8405 mounted filesystems.
8410 return 0 if ($gconfig{'os_type'} ne 'solaris' ||
8411 $gconfig{'os_version'} < 10);
8412 my $zn = `zonename 2>$null_file`;
8414 return $zn && $zn ne "global";
8417 =head2 running_in_vserver
8419 Returns 1 if the current Webmin instance is running in a Linux VServer.
8420 Used to disable modules and features that are not appropriate.
8423 sub running_in_vserver
8425 return 0 if ($gconfig{'os_type'} !~ /^\*-linux$/);
8428 open(MTAB, "/etc/mtab");
8430 my ($dev, $mp) = split(/\s+/, $_);
8431 if ($mp eq "/" && $dev =~ /^\/dev\/hdv/) {
8440 =head2 running_in_xen
8442 Returns 1 if Webmin is running inside a Xen instance, by looking
8443 at /proc/xen/capabilities.
8448 return 0 if (!-r "/proc/xen/capabilities");
8449 my $cap = &read_file_contents("/proc/xen/capabilities");
8450 return $cap =~ /control_d/ ? 0 : 1;
8453 =head2 running_in_openvz
8455 Returns 1 if Webmin is running inside an OpenVZ container, by looking
8456 at /proc/vz/veinfo for a non-zero line.
8459 sub running_in_openvz
8461 return 0 if (!-r "/proc/vz/veinfo");
8462 my $lref = &read_file_lines("/proc/vz/veinfo", 1);
8463 return 0 if (!$lref || !@$lref);
8464 foreach my $l (@$lref) {
8466 my @ll = split(/\s+/, $l);
8467 return 0 if ($ll[0] eq '0');
8472 =head2 list_categories(&modules, [include-empty])
8474 Returns a hash mapping category codes to names, including any custom-defined
8475 categories. The modules parameter must be an array ref of module hash objects,
8476 as returned by get_all_module_infos.
8481 my ($mods, $empty) = @_;
8482 my (%cats, %catnames);
8483 &read_file("$config_directory/webmin.catnames", \%catnames);
8484 foreach my $o (@lang_order_list) {
8485 &read_file("$config_directory/webmin.catnames.$o", \%catnames);
8490 foreach my $m (@$mods) {
8491 my $c = $m->{'category'};
8492 next if ($cats{$c});
8493 if (defined($catnames{$c})) {
8494 $cats{$c} = $catnames{$c};
8496 elsif ($text{"category_$c"}) {
8497 $cats{$c} = $text{"category_$c"};
8500 # try to get category name from module ..
8501 my %mtext = &load_language($m->{'dir'});
8502 if ($mtext{"category_$c"}) {
8503 $cats{$c} = $mtext{"category_$c"};
8506 $c = $m->{'category'} = "";
8507 $cats{$c} = $text{"category_$c"};
8514 =head2 is_readonly_mode
8516 Returns 1 if the current user is in read-only mode, and thus all writes
8517 to files and command execution should fail.
8520 sub is_readonly_mode
8522 if (!defined($main::readonly_mode_cache)) {
8523 my %gaccess = &get_module_acl(undef, "");
8524 $main::readonly_mode_cache = $gaccess{'readonly'} ? 1 : 0;
8526 return $main::readonly_mode_cache;
8529 =head2 command_as_user(user, with-env?, command, ...)
8531 Returns a command to execute some command as the given user, using the
8532 su statement. If on Linux, the /bin/sh shell is forced in case the user
8533 does not have a valid shell. If with-env is set to 1, the -s flag is added
8534 to the su command to read the user's .profile or .bashrc file.
8539 my ($user, $env, @args) = @_;
8540 my @uinfo = getpwnam($user);
8541 if ($uinfo[8] ne "/bin/sh" && $uinfo[8] !~ /\/bash$/) {
8542 # User shell doesn't appear to be valid
8543 if ($gconfig{'os_type'} =~ /-linux$/) {
8544 # Use -s /bin/sh to force it
8545 $shellarg = " -s /bin/sh";
8547 elsif ($gconfig{'os_type'} eq 'freebsd' ||
8548 $gconfig{'os_type'} eq 'solaris' &&
8549 $gconfig{'os_version'} >= 11 ||
8550 $gconfig{'os_type'} eq 'macos') {
8551 # Use -m and force /bin/sh
8552 @args = ( "/bin/sh", "-c", quotemeta(join(" ", @args)) );
8556 my $rv = "su".($env ? " -" : "").$shellarg.
8557 " ".quotemeta($user)." -c ".quotemeta(join(" ", @args));
8561 =head2 list_osdn_mirrors(project, file)
8563 This function is now deprecated in favor of letting sourceforge just
8564 redirect to the best mirror, and now just returns their primary download URL.
8567 sub list_osdn_mirrors
8569 my ($project, $file) = @_;
8570 return ( { 'url' => "http://downloads.sourceforge.net/$project/$file",
8572 'mirror' => 'downloads' } );
8575 =head2 convert_osdn_url(url)
8577 Given a URL like http://osdn.dl.sourceforge.net/sourceforge/project/file.zip
8578 or http://prdownloads.sourceforge.net/project/file.zip , convert it
8579 to a real URL on the sourceforge download redirector.
8582 sub convert_osdn_url
8585 if ($url =~ /^http:\/\/[^\.]+.dl.sourceforge.net\/sourceforge\/([^\/]+)\/(.*)$/ ||
8586 $url =~ /^http:\/\/prdownloads.sourceforge.net\/([^\/]+)\/(.*)$/) {
8587 # Always use the Sourceforge mail download URL, which does
8588 # a location-based redirect for us
8589 my ($project, $file) = ($1, $2);
8590 $url = "http://prdownloads.sourceforge.net/sourceforge/".
8592 return wantarray ? ( $url, 0 ) : $url;
8595 # Some other source .. don't change
8596 return wantarray ? ( $url, 2 ) : $url;
8600 =head2 get_current_dir
8602 Returns the directory the current process is running in.
8608 if ($gconfig{'os_type'} eq 'windows') {
8621 =head2 supports_users
8623 Returns 1 if the current OS supports Unix user concepts and functions like
8624 su , getpw* and so on. This will be true on Linux and other Unixes, but false
8630 return $gconfig{'os_type'} ne 'windows';
8633 =head2 supports_symlinks
8635 Returns 1 if the current OS supports symbolic and hard links. This will not
8636 be the case on Windows.
8639 sub supports_symlinks
8641 return $gconfig{'os_type'} ne 'windows';
8644 =head2 quote_path(path)
8646 Returns a path with safe quoting for the current operating system.
8652 if ($gconfig{'os_type'} eq 'windows' || $path =~ /^[a-z]:/i) {
8653 # Windows only supports "" style quoting
8657 return quotemeta($path);
8661 =head2 get_windows_root
8663 Returns the base windows system directory, like c:/windows.
8666 sub get_windows_root
8668 if ($ENV{'SystemRoot'}) {
8669 my $rv = $ENV{'SystemRoot'};
8674 return -d "c:/windows" ? "c:/windows" : "c:/winnt";
8678 =head2 read_file_contents(file)
8680 Given a filename, returns its complete contents as a string. Effectively
8681 the same as the Perl construct `cat file`.
8684 sub read_file_contents
8686 &open_readfile(FILE, $_[0]) || return undef;
8693 =head2 unix_crypt(password, salt)
8695 Performs Unix encryption on a password, using the built-in crypt function or
8696 the Crypt::UnixCrypt module if the former does not work. The salt parameter
8697 must be either an already-hashed password, or a two-character alpha-numeric
8703 my ($pass, $salt) = @_;
8704 return "" if ($salt !~ /^[a-zA-Z0-9\.\/]{2}/); # same as real crypt
8705 my $rv = eval "crypt(\$pass, \$salt)";
8707 return $rv if ($rv && !$@);
8708 eval "use Crypt::UnixCrypt";
8710 return Crypt::UnixCrypt::crypt($pass, $salt);
8713 &error("Failed to encrypt password : $err");
8717 =head2 split_quoted_string(string)
8719 Given a string like I<foo "bar baz" quux>, returns the array :
8723 sub split_quoted_string
8727 while($str =~ /^"([^"]*)"\s*([\000-\377]*)$/ ||
8728 $str =~ /^'([^']*)'\s*([\000-\377]*)$/ ||
8729 $str =~ /^(\S+)\s*([\000-\377]*)$/) {
8736 =head2 write_to_http_cache(url, file|&data)
8738 Updates the Webmin cache with the contents of the given file, possibly also
8739 clearing out old data. Mainly for internal use by http_download.
8742 sub write_to_http_cache
8744 my ($url, $file) = @_;
8745 return 0 if (!$gconfig{'cache_size'});
8747 # Don't cache downloads that look dynamic
8748 if ($url =~ /cgi-bin/ || $url =~ /\?/) {
8752 # Check if the current module should do caching
8753 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8754 # Caching all except some modules
8755 my @mods = split(/\s+/, $1);
8756 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8758 elsif ($gconfig{'cache_mods'}) {
8759 # Only caching some modules
8760 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8761 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8767 $size = length($$file);
8770 my @st = stat($file);
8774 if ($size > $gconfig{'cache_size'}) {
8775 # Bigger than the whole cache - so don't save it
8780 $cfile = "$main::http_cache_directory/$cfile";
8782 # See how much we have cached currently, clearing old files
8784 mkdir($main::http_cache_directory, 0700) if (!-d $main::http_cache_directory);
8785 opendir(CACHEDIR, $main::http_cache_directory);
8786 foreach my $f (readdir(CACHEDIR)) {
8787 next if ($f eq "." || $f eq "..");
8788 my $path = "$main::http_cache_directory/$f";
8789 my @st = stat($path);
8790 if ($gconfig{'cache_days'} &&
8791 time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8792 # This file is too old .. trash it
8797 push(@cached, [ $path, $st[7], $st[9] ]);
8801 @cached = sort { $a->[2] <=> $b->[2] } @cached;
8802 while($total+$size > $gconfig{'cache_size'} && @cached) {
8803 # Cache is too big .. delete some files until the new one will fit
8804 unlink($cached[0]->[0]);
8805 $total -= $cached[0]->[1];
8809 # Finally, write out the new file
8811 &open_tempfile(CACHEFILE, ">$cfile");
8812 &print_tempfile(CACHEFILE, $$file);
8813 &close_tempfile(CACHEFILE);
8816 my ($ok, $err) = ©_source_dest($file, $cfile);
8822 =head2 check_in_http_cache(url)
8824 If some URL is in the cache and valid, return the filename for it. Mainly
8825 for internal use by http_download.
8828 sub check_in_http_cache
8831 return undef if (!$gconfig{'cache_size'});
8833 # Check if the current module should do caching
8834 if ($gconfig{'cache_mods'} =~ /^\!(.*)$/) {
8835 # Caching all except some modules
8836 my @mods = split(/\s+/, $1);
8837 return 0 if (&indexof(&get_module_name(), @mods) != -1);
8839 elsif ($gconfig{'cache_mods'}) {
8840 # Only caching some modules
8841 my @mods = split(/\s+/, $gconfig{'cache_mods'});
8842 return 0 if (&indexof(&get_module_name(), @mods) == -1);
8847 $cfile = "$main::http_cache_directory/$cfile";
8848 my @st = stat($cfile);
8849 return undef if (!@st || !$st[7]);
8850 if ($gconfig{'cache_days'} && time()-$st[9] > $gconfig{'cache_days'}*24*60*60) {
8855 open(TOUCH, ">>$cfile"); # Update the file time, to keep it in the cache
8860 =head2 supports_javascript
8862 Returns 1 if the current browser is assumed to support javascript.
8865 sub supports_javascript
8867 if (defined(&theme_supports_javascript)) {
8868 return &theme_supports_javascript();
8870 return $ENV{'MOBILE_DEVICE'} ? 0 : 1;
8873 =head2 get_module_name
8875 Returns the name of the Webmin module that called this function. For internal
8876 use only by other API functions.
8881 return &get_module_variable('$module_name');
8884 =head2 get_module_variable(name, [ref])
8886 Returns the value of some variable which is set in the caller's context, if
8887 using the new WebminCore package. For internal use only.
8890 sub get_module_variable
8892 my ($v, $wantref) = @_;
8893 my $slash = $wantref ? "\\" : "";
8894 my $thispkg = &web_libs_package();
8895 if ($thispkg eq 'WebminCore') {
8896 my ($vt, $vn) = split('', $v, 2);
8898 for(my $i=0; ($callpkg) = caller($i); $i++) {
8899 last if ($callpkg ne $thispkg);
8901 return eval "${slash}${vt}${callpkg}::${vn}";
8903 return eval "${slash}${v}";
8906 =head2 clear_time_locale()
8908 Temporarily force the locale to C, until reset_time_locale is called. This is
8909 useful if your code is going to call C<strftime> from the POSIX package, and
8910 you want to ensure that the output is in a consistent format.
8913 sub clear_time_locale
8915 if ($main::clear_time_locale_count == 0) {
8918 $main::clear_time_locale_old = POSIX::setlocale(POSIX::LC_TIME);
8919 POSIX::setlocale(POSIX::LC_TIME, "C");
8922 $main::clear_time_locale_count++;
8925 =head2 reset_time_locale()
8927 Revert the locale to whatever it was before clear_time_locale was called
8930 sub reset_time_locale
8932 if ($main::clear_time_locale_count == 1) {
8934 POSIX::setlocale(POSIX::LC_TIME, $main::clear_time_locale_old);
8935 $main::clear_time_locale_old = undef;
8938 $main::clear_time_locale_count--;
8941 =head2 callers_package(filehandle)
8943 Convert a non-module filehandle like FOO to one qualified with the
8944 caller's caller's package, like fsdump::FOO. For internal use only.
8950 my $callpkg = (caller(1))[0];
8951 my $thispkg = &web_libs_package();
8952 if (!ref($fh) && $fh !~ /::/ &&
8953 $callpkg ne $thispkg && $thispkg eq 'WebminCore') {
8954 $fh = $callpkg."::".$fh;
8959 =head2 web_libs_package()
8961 Returns the package this code is in. We can't always trust __PACKAGE__. For
8965 sub web_libs_package
8967 if ($called_from_webmin_core) {
8968 return "WebminCore";
8973 =head2 get_userdb_string
8975 Returns the URL-style string for connecting to the users and groups database
8978 sub get_userdb_string
8980 return undef if ($main::no_miniserv_userdb);
8982 &get_miniserv_config(\%miniserv);
8983 return $miniserv{'userdb'};
8986 =head2 connect_userdb(string)
8988 Returns a handle for talking to a user database - may be a DBI or LDAP handle.
8989 On failure returns an error message string. In an array context, returns the
8996 my ($proto, $user, $pass, $host, $prefix, $args) = &split_userdb_string($str);
8997 if ($proto eq "mysql") {
8998 # Connect to MySQL with DBI
8999 my $drh = eval "use DBI; DBI->install_driver('mysql');";
9000 $drh || return $text{'sql_emysqldriver'};
9001 my ($host, $port) = split(/:/, $host);
9002 my $cstr = "database=$prefix;host=$host";
9003 $cstr .= ";port=$port" if ($port);
9004 my $dbh = $drh->connect($cstr, $user, $pass, { });
9005 $dbh || return &text('sql_emysqlconnect', $drh->errstr);
9006 $dbh->{'AutoCommit'} = 1;
9007 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9009 elsif ($proto eq "postgresql") {
9010 # Connect to PostgreSQL with DBI
9011 my $drh = eval "use DBI; DBI->install_driver('Pg');";
9012 $drh || return $text{'sql_epostgresqldriver'};
9013 my ($host, $port) = split(/:/, $host);
9014 my $cstr = "dbname=$prefix;host=$host";
9015 $cstr .= ";port=$port" if ($port);
9016 my $dbh = $drh->connect($cstr, $user, $pass);
9017 $dbh || return &text('sql_epostgresqlconnect', $drh->errstr);
9018 $dbh->{'AutoCommit'} = 1;
9019 return wantarray ? ($dbh, $proto, $prefix, $args) : $dbh;
9021 elsif ($proto eq "ldap") {
9022 # Connect with perl LDAP module
9023 eval "use Net::LDAP";
9024 $@ && return $text{'sql_eldapdriver'};
9025 my ($host, $port) = split(/:/, $host);
9026 my $scheme = $args->{'scheme'} || 'ldap';
9028 $port = $scheme eq 'ldaps' ? 636 : 389;
9030 my $ldap = Net::LDAP->new($host,
9032 'scheme' => $scheme);
9033 $ldap || return &text('sql_eldapconnect', $host);
9035 if ($args->{'tls'}) {
9036 # Switch to TLS mode
9037 eval { $mesg = $ldap->start_tls(); };
9038 if ($@ || !$mesg || $mesg->code) {
9039 return &text('sql_eldaptls',
9040 $@ ? $@ : $mesg ? $mesg->error : "Unknown error");
9043 # Login to the server
9045 $mesg = $ldap->bind(dn => $user, password => $pass);
9048 $mesg = $ldap->bind(dn => $user, anonymous => 1);
9050 if (!$mesg || $mesg->code) {
9051 return &text('sql_eldaplogin', $user,
9052 $mesg ? $mesg->error : "Unknown error");
9054 return wantarray ? ($ldap, $proto, $prefix, $args) : $ldap;
9057 return "Unknown protocol $proto";
9061 =head2 disconnect_userdb(string, &handle)
9063 Closes a handle opened by connect_userdb
9066 sub disconnect_userdb
9069 if ($str =~ /^(mysql|postgresql):/) {
9074 elsif ($str =~ /^ldap:/) {
9080 =head2 split_userdb_string(string)
9082 Converts a string like mysql://user:pass@host/db into separate parts
9085 sub split_userdb_string
9088 if ($str =~ /^([a-z]+):\/\/([^:]*):([^\@]*)\@([a-z0-9\.\-\_]+)\/([^\?]+)(\?(.*))?$/) {
9089 my ($proto, $user, $pass, $host, $prefix, $argstr) =
9090 ($1, $2, $3, $4, $5, $7);
9091 my %args = map { split(/=/, $_, 2) } split(/\&/, $argstr);
9092 return ($proto, $user, $pass, $host, $prefix, \%args);
9097 $done_web_lib_funcs = 1;