As found on chiark in /usr/local/lib/news/feed+read/newsrc-listgroups

[userv-utils] / newsrc-lg / newsrc-listgroups

#!/usr/bin/perl

$minreaddays= 21;
$maxperuser= 250;

open(CONF,"$ARGV[0]") or die $!;
while(<CONF>) {
    next if m/^\#/ || !m/^\S/;
    next if m/^(myfqdn|xref|server|server-nosearch|fetch|read|post|permit|believe|extrarc)\s/;
    if (m/^minreaddays\s+(\d+)\s+$/) {
        $minreaddays= $1;
    } elsif (m/^maxperuser\s+(\d+)\s+$/) {
        $maxperuser= $1;
    } else {
        die "$_ ?";
    }
}

$newsrc= ".newsrc";
exit 0 if -l $newsrc || ! -f _ || -M _ > $minreaddays;

@g= ();

open NEWSRC, $newsrc or die $!;
while (<NEWSRC>) {
    next unless s/:.*\n$//;
    next unless m/^[-a-z0-9+]+\.[-a-z0-9+._]+$/i;
    push @g, "$_\n";
}
close NEWSRC or die $!;

exit 0 if @g > $maxperuser;

print sort @g or die $!;
close STDOUT or die $!;

exit 0;