1#!/bin/sh
2
3if [ $# != 2 ]; then
4    echo not enough args
5    echo usage: $0 file device
6    exit 1
7fi
8
9if [ ! -f $1 ]; then
10    echo input file does not exist
11    exit 1
12fi
13
14if [ ! -b $2 ]; then
15    echo output device does not exist
16    exit 1
17fi
18
19UNAME=`uname`
20
21case `uname` in
22    Darwin)
23        set -v
24        sudo diskutil unmount $2 || exit 1
25        sudo dd if=$1 of=$2 bs=2048 seek=1 || exit 1
26        sudo diskutil eject $2 || exit 1
27    ;;
28    Linux)
29        set -v
30        sudo umount $2
31        sudo dd if=$1 of=$2 bs=2048 seek=1 || exit 1
32        sudo sync
33    ;;
34esac
35