#!/bin/bash
# Usage: nicegrep NICE MAXMEMORY ARG...
# Executes grep with the provided arguments using `nice -n NICE` and `ulimit -v MAXMEMORY`
nice="$1"; shift
maxMemory="$1"; shift
if [[ "${maxMemory}" != '0' ]]; then ulimit -v "${maxMemory}"; fi
exec nice -n "${nice}" grep "$@"