Dear Monks,

New guy here again. I am trying to list the available UIDs between 200 and 250 on an AIX system. I have a working solution but it's ugly. I am sure there are some of you with Perl PHDs that can suggest a more elegant solution then the one below :) Please let me know what you suggest, thanks! 

#!/usr/bin/perl -W

my $alluids = "/tmp/uid_list.file";

open (UIDS, ">$alluids") || die "Cannot open file $alluids\n";

while (my @uidlst = getpwent) {
    print UIDS "$uidlst[2]\n";
}

close(UIDS);

open (UIDS, "<$alluids") || die "Cannot open file $alluids\n";
while(<UIDS>) {
  chomp;
  push(@arr, $_);
}
close(UIDS);

my %hash = map { $_ => 1 } @arr;
foreach $i (200..250) {
if ( ! defined $hash{$i} ) {
print "$i ";
}
}

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In reply to Finding the lowest available UIDs by ronix

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