PNG Crush Script

#!/bin/sh
# PNGCrush Script
# Copyright James Mates -- http://sial.org/blog/scripts/
# Color information stripping added by Mark Percival - http://mpercival.com
if [ -z "$1" ]; then
  echo "Usage: `basename $0` png-image [...]" >&2
  exit 1
fi
for file in "$@"; do
  TMPFILE=`mktemp .crush-png-tmp.XXXXXXXX` || exit 1
  pngcrush -brute -fix -reduce -rem gAMA -rem cHRM -rem iCCP -rem sRGB "$file" "$TMPFILE" 1>/dev/null || exit 1
  mv "$TMPFILE" "$file"
done