#!/usr/bin/perl -w


#######################################
#you need to create a file called     #
#users.csv in the same dir as         #
#you run the script in.               #
# no strict 'vars' isn't that a good  #
#idea to use.                         #
#######################################

use strict; no strict 'vars';



$userfile = "users.csv";
$yourhost = "\@yourdomain.??";


main();


sub main {

    create();
    my $input = input();    
    print "You are looking for $input\n";
    match();
    exit;
}



sub match {
    open FILE, "<$userfile"
        or die "Can't read $userfile; $! \n";
    my ( $name, $uid, $dir );
    my $found;
    search: while (<FILE>) {
        chop;
        ( $name, $uid, $dir) = split( /:/, $_ );
        if ($name eq $youare) {
            $found = $.;
        

            print "Located person: $youare on line $found\n\n";

            
            
            print "Person:       $youare\n";
            print "UID:          $uid\n";
            print "Homedir:      $dir\n";
            print "Email:        $name$yourhost\n";
        }
    }
    exit;
}



    
sub input {
    print "Enter username to look for\n"; 
    $youare = <STDIN>;
    chomp $youare;
    return $youare;
}


sub create {
    if ((-M $userfile > 3) or (-z $userfile)) {
        while (($name, undef, $uid, undef, undef, undef, undef, $dir,) = getpwent) {
            
            open USERDATA, ">>$userfile"
                or die "Can't open $userfile for Appending: $!\n";
            my $record = join( ":", $name, $uid, $dir );
            print(USERDATA "$record\n")
                or die "Error writing to $userfile: $!\n";
        }
    }
    
}