#!/bin/bash
#if less than 3 agrs are provided
#help section
if [[ $# -lt 3 ]] ; then
    echo 'usage: usernamepasswordgenerator.sh /someplace/usernames.txt /someplace/passwords.txt /someplace/combined.txt'
    exit 0
fi
#-h
if [ "$1" == "-h" ]; then
echo 'usage: usernamepasswordgenerator.sh /someplace/usernames.txt /someplace/passwords.txt /someplace/combined.txt'
  exit 0
fi
#--help
if [ "$1" == "--help" ]; then
echo 'usage: usernamepasswordgenerator.sh /someplace/usernames.txt /someplace/passwords.txt /someplace/combined.txt'
  exit 0
fi

#the generation part, two loops ezy pezy
while read username;do
while read password; do
echo $username:$password >> $3
done <$2
done <$1
echo "completed with $(wc -l $3 |cut -d ' ' -f1) lines total"