Hi Folks

I am very much a newbie at perl but picking it up and I'm hoping you can help.

I have a file input that details all the /etc/group files in our enterprise in the following format: "<host>:<group>:<gid>:<users>"

I want to parse this data display it as the following: "<group>:<gid>:<users>"

So i can trace which users are members of each group (regardless of the host).

So far I have used a hash and am using <group>:<gid> as my key.

This is my code so far: 

#!/usr/bin/perl

use strict;
use warnings;
use Cwd;

my $cwd = cwd;
my $file = $cwd . '/usrgrps.txt';
my $gid;
my $grp;
my $host;
my $group;
my $userid;
my %table = ();

 open(FILE, "<", $file) or die "Can't open $file:$!";
                        while(<FILE>) {
                                chomp;
                                ($host, $grp, $gid, $userid) = split(/
+:/, $_);
                $group = "$grp:$gid";
                push @{$table{$group}}, $userid;
                }
        foreach $group (sort keys %table) {
            print "$group:";
            my @users = @{$table{$group}};
            print join ',', sort @users;
            print "\n";
        }
my $number = values %table; 
print $number . "\n";

[download]

This is roughly my input file:
host1:group1:9001:user1,user2,user3,user4,user5
host1:group2:9002:user1,user2,user3
host1:group3:9003:user1,user2,user4
host1:group4:9004:user1,user2,user5
host1:group5:9005:user1,user2
host1:group6:9006:
host2:group1:9001:user1,user2,user3,user4,user5
host2:group2:9002:user1,user2,user3
host2:group3:9003:user1,user2,user4
host2:group4:9004:user1,user2,user5
host2:group5:9005:user1,user2
host2:group1:9006:
host3:group1:9001:user1,user2,user3,user4,user5
host3:group2:9002:user1,user2,user3
host3:group3:9003:user1,user2,user4
host3:group4:9004:user1,user2,user5
host3:group5:9005:user1,user2
host3:group1:9006:

This is what I am getting back:

group1:9001:user1,user2,user3,user4,user5,user1,user2,user3,user4,user5,user1,user2,user3,user4,user5
group2:9002:user1,user2,user3,user1,user2,user3,user1,user2,user3
group3:9003:user1,user2,user4,user1,user2,user4,user1,user2,user4
group4:9004:user1,user2,user5,user1,user2,user5,user1,user2,user5
group5:9005:user1,user2,user1,user2,user1,user2
group6:9006:,,,


My question is, how do I get only unique elements assigned to each key? Any help or advise you can offer will be greatly appreciated. Thanks in advance

In reply to Sorting a hash value that is a list by g_string

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.