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#!/usr/bin/perl -w
## $Id: server-list.in 7170 2005-04-10 10:24:12Z rra $
##
## Miniature server that just answers LIST queries.
##
## This is a miniature NNTP server that listens to port 11119 on the IPv4
## loopback address and answers LIST queries from INN's testing data. It is
## used for testing getlist.
##
## When started, it prints out its PID to standard output to make it easier
## to kill later.
use IO::Socket::INET ();
# Process a list command. Only a very minimal wildmat syntax is supported.
sub list {
my ($fh, $list, $wildmat) = @_;
$wildmat = quotemeta $wildmat;
$wildmat =~ s/\\\?/./;
$wildmat =~ s/\\\*/.*/;
if (open (LIST, "../data/db/$list")) {
print $fh "215 List follows\r\n";
local $_;
while (<LIST>) {
chomp;
my ($group) = split ' ';
if ($group =~ /^$wildmat$/) {
print $fh $_, "\r\n";
}
}
close LIST;
print $fh ".\r\n";
} else {
print $fh "501 Unknown list type $list\r\n";
}
}
# Read commands from a socket and process them.
sub serve {
my ($fh) = @_;
local $_;
while (<$fh>) {
my @command = split (' ', lc $_);
if ($command[0] eq 'quit') {
print $fh "205 Done\r\n";
close $fh;
return;
} elsif ($command[0] ne 'list') {
print $fh "500 Unknown command\r\n";
} elsif (@command > 3) {
print $fh "501 Too many arguments\r\n";
} elsif (@command > 1 && $command[1] !~ /^[a-z.]+$/) {
print $fh "501 Unknown list type $command[1]\r\n";
} elsif (@command == 1) {
list ($fh, 'active', '*');
} else {
push (@command, '*') unless @command > 2;
list ($fh, @command[1,2]);
}
}
close $fh;
}
# Background ourselves and then record the PID. Don't exit the parent process
# until the pid file shows up, indicating the child has started.
unlink './pid';
my $pid = fork;
if ($pid < 0) {
die "Cannot fork: $!\n";
} elsif ($pid > 0) {
select (undef, undef, undef, 0.1) while (!-f './pid');
exit;
} else {
close STDIN;
close STDOUT;
}
# Listen for connections and handle them.
my $server = IO::Socket::INET->new (LocalAddr => "127.0.0.1",
LocalPort => 11119,
Proto => "tcp",
Listen => 1,
ReuseAddr => 1)
or die "Cannot create socket: $!\n";
$SIG{TERM} = sub { close $server; exit };
open (PID, '> pid') or die "Cannot create pid: $!\n";
print PID "$$\n";
close PID;
while ($fh = $server->accept) {
print $fh "200 Welcome\r\n";
serve ($fh);
}
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