#! /bin/bash
# This script tests: pnmtorast rasttopnm
# Also requires: 

  alias pnmtorast="${PBM_TESTPREFIX}pnmtorast"
  alias rasttopnm="${PBM_TESTPREFIX}rasttopnm"
  shopt -s expand_aliases

# Should produce 1926073387 101484, cksum of testimg.ppm
pnmtorast testimg.ppm | rasttopnm | cksum