1 #!/bin/bash 2 case $1 in 3 0) exit;; 4 1) mogrify -rotate "-90" "$2"; exit;; 5 2) mogrify -rotate "90" "$2"; exit;; 6 3) exit;; 7 4) exit;; 8 5) exit;; 9 6) exit;; 10 7) exit;; 11 8) exit;; 12 9) exit;; 13 *) echo "unrecognized command"; exit ;; 14 esac 15