Simple bash script for Mac OS X to copy data from removable media (sd card) to file, with progres information

readfromdisk.sh

#!/bin/bash
NUMARGS=2

if [ $# -ne $NUMARGS ]
then
  echo "Usage: `basename $0` <file.img> </dev/diskN>"
  exit
fi

DEVICE="$2"
IMAGE="$1"

diskutil unmountDisk $DEVICE
dd if=$DEVICE bs=1m | pv -ptre $DEVICE | dd of=$IMAGE bs=1m
diskutil eject $DEVICE