#!/bin/sh
if [ $# -eq 0 ]; then
    echo "usage: minisblk file" >&2
    exit 1
fi
tmpfile=$(mktemp ~/.minisblk.XXXXXX) || exit 1
tifftopnm "$1" | pnmtotiff -g4 -miniswhite > $tmpfile || \
	{ rm -f $tmpfile; exit 1; }
mv -f $tmpfile "$1" && chmod go+r "$1"
.