#!/bin/bash

if [[ $# -ne 1 ]]; then
    echo -e "\e[1;3;31mNeed ONE and only ONE digital parameter.\e[0m"
    exit 1
fi

if ! [[ $1 -gt 0 && $1 -lt 80 ]] 2>/dev/null; then
    echo -e "\e[1;3;31mNeed ONE DIGITAL parameter, which must be greater than 0 and lower than 80.\e[0m"
    exit 2
fi

# total 80 bits password
pwgen_0=`pwgen -sync`
pwgen_1=`pwgen -sync`
pwgen_2=`pwgen -sync`
pwgen_3=`pwgen -sync`
pwgen_4=`pwgen -sync`
pwgen_5=`pwgen -sync`
pwgen_6=`pwgen -sync`
pwgen_7=`pwgen -sync`
pwgen_8=`pwgen -sync`
pwgen_9=`pwgen -sync`

pwgen_80=${pwgen_0}${pwgen_1}${pwgen_2}${pwgen_3}${pwgen_4}${pwgen_5}${pwgen_6}${pwgen_7}${pwgen_8}${pwgen_9}
echo ${pwgen_80:0:${1}}