#!/bin/bash
#
# Generates `good` random password
#

if [ -z "$1" ]; then
	LEN=12
else
	LEN=$1
fi

if type -t uuencode >/dev/null ; then
	function encode { uuencode -m - | sed '1d;3d'; }
elif type -t base64 >/dev/null ; then
	function encode { base64 -; }
else
	echo "There is no suitable base64encode function" 1>&2
	exit 1
fi

PASSWORD=$(head -c $(($LEN * 2)) /dev/urandom | encode | tr '\n' ' ' | sed 's/[^a-zA-Z0-9]//g' | head -c $LEN)
echo "$PASSWORD"