Try running this:
  
#!/usr/bin/perl -w
use strict;

open my $fh_group, "</etc/group" or die "Cannot open group file";

while (<$fh_group>) {
  chomp;
  my ($grp, $pwd, $gid, $users) = split /:/;
  if ($grp eq $ARGV[0]) {
    my @users = split /,/, $users;
    print join $/, @users;
  }
}

[download]
Save it to a file, and run it with a command line argument of the group you'd like to check membership for, for example: 
perl program.pl steel

[download]
   MeowChow                                   
               s aamecha.s a..a\u$&owag.print

In reply to (MeowChow) Re3: 2048 character limit by MeowChow
in thread 2048 character limit by druid

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