#!/usr/bin/perl -w
#################################################################################
## Author:      BRIAN HUNTER
## Date:        8/10/2020
## Email:       brian@sutechy.com
#################################################################################
##
## DETERMINE NEXT UID THAT IS UNIQUE FOR NEXT USER ACCOUNT CREATION.
##
use strict;
my $file = "/etc/passwd";
my @UID;
my $DEBUG="0";

open(FILE, "<$file") or die ("UNABLE TO OPEN $file FOR READING: $!\n");
while(< FILE>){
    my($user,$x,$uid,@rest) = split(/:/,$_);
    push(@UID, $uid);
}
close(FILE);

print "ARRAY SIZE: $#UID\n";
my $cnt = '0';

foreach (sort { $a <=> $b } @UID) {
   if($DEBUG == '1') { print "UID= $_\n"; }
   $cnt+=1;
   if($cnt == $#UID) {
     if($DEBUG == '1') { print "UID: $_\n"; }
     my $nextuid=$_ + 2;
     print "NEXT UID: $nextuid\n";
   }
}