+#
+# the help subsystem
+#
+# apropos - this does a grep on the command file and returns the commands
+# that contain the string searched for
+#
+# Copyright (c) 1998 - Dirk Koopman G1TLH
+#
+# $Id$
+#
+
+my ($self, $line) = @_;
+my @out;
+
+my $lang = $self->lang;
+$lang = 'en' if !$lang;
+
+my $in;
+$line = 'help' unless $line;
+$line =~ s/\W//g; # remove dubious characters
+
+my ($priv, $cmd, $desc);
+my %cmd;
+
+my $defh = new IO::File;
+unless ($defh->open("$main::localcmd/Commands_en.hlp")) {
+ unless($defh->open("$main::cmd/Commands_en.hlp")) {
+ return (1, $self->msg('helpe1'));
+ }
+}
+
+my $h;
+if ($lang ne 'en') {
+ $h = new IO::File;
+ unless ($h->open("$main::localcmd/Commands_$lang.hlp")) {
+ unless($h->open("$main::cmd/Commands_$lang.hlp")) {
+ undef $h;
+ }
+ }
+}
+
+# do english help
+my $include;
+foreach $in (<$defh>) {
+ next if $in =~ /^\#/;
+ chomp $in;
+ $in =~ s/\r$//;
+ if ($in =~ /^===/) {
+ $cmd{$cmd} = "$cmd $desc" if $include;
+ $include = 0;
+ $in =~ s/=== //;
+ ($priv, $cmd, $desc) = split /\^/, $in;
+ next if $priv > $self->priv; # ignore subcommands that are of no concern
+ next unless $cmd =~ /$line/i || $desc =~ /$line/i;
+ next if $cmd =~ /-$/o;
+ $include = 1;
+ next;
+ }
+ $include =~ 1 if $cmd =~ /$line/i;
+}
+$cmd{$cmd} = "$cmd $desc" if $include;
+$defh->close;
+
+# override with any not english help
+if ($h) {
+ my $include;
+ foreach $in (<$h>) {
+ next if $in =~ /^\#/;
+ chomp $in;
+ $in =~ s/\r$//;
+ if ($in =~ /^===/) {
+ $cmd{$cmd} = "$cmd $desc" if $include;
+ $include = 0;
+ $in =~ s/=== //;
+ ($priv, $cmd, $desc) = split /\^/, $in;
+ next if $priv > $self->priv; # ignore subcommands that are of no concern
+ next unless $cmd =~ /$line/i || $desc =~ /$line/i;
+ next if $cmd =~ /-$/o;
+ $include = 1;
+ next;
+ }
+ $include =~ 1 if $cmd =~ /$line/i;
+ }
+ $cmd{$cmd} = "$cmd $desc" if $include;
+ $h->close;
+}
+
+push @out, map {$cmd{$_}} sort keys %cmd;
+
+push @out, $self->msg('helpe2', $line) if @out == 0;
+
+return (1, @out);