#!/bin/sh
# rotating an image without changing its time-stamp
# 2003/11/15 Kenlo Nishida
# note: "rotjpg_" command is original of KN

if [ $# -lt 1 ]; then echo "usage: $ rot_ filename.jpg"; fi
rotjpg_ 90 <$1 >dummy.jpg
touch -t `date -r $1 '+%Y%m%d%H%M.%S'` dummy.jpg
mv dummy $1