#!/usr/bin/zsh
#in a zsh shell jhead -autorot targetdirectory/**/* works for rotating
#all files in all subdirectories
jhead -autorot "$1/**/*"

#!/bin/sh
#not sure if the following is how it's supposed to be done:
comd=find "$1" -name *.JPG
for comd
do
output+=$(jhead -autorot "$arg")
done