#!/bin/sh
# Simple random string generator for passwords and usernames
# $LEN initial declaration commented out for runtime LEN config

LC_ALL=C
#LEN=${LEN:-24}
ALPHA="A-Za-z"
NUM="0-9"
SPECIAL='!"#$%&'\''()*+,-./:;<=>?@[\]^_`{|}~'

random() {
	</dev/urandom tr -dc "${ALPHA}${NUM}${SPECIAL}" | dd bs=1 count=${LEN:-32} 2>/dev/null ; echo
}

case $1 in
	pass)
		random ;;
	user)
		LEN=${LEN:-12} SPECIAL='' random ;;
	*)
		printf "Usage: $0 pass|user\nSet LEN environment variable for length" ;;
esac