nullbytes

#!/bin/sh

bs="${1}"
shift 1
count="${1:-1}"
shift 1

if [ -z "${bs}" ]
then
    1>&2 echo "usage:"
    1>&2 echo "  ${0} <number of null bytes> [count=1]"
    exit 1
fi

exec dd 2>/dev/null </dev/zero bs="$bs" count="$count"