#!/bin/sh

# Mount partitions within a disk image file

# License: LGPLv2
# Author: P@adraigBrady.com

# V1.0      29 Jun 2005     Initial release
# V1.1      01 Dec 2005     Handle bootable (DOS) parititons
# v1.2      25 Jan 2013     Glen Gray: Handle GPT partitions

if test "$Argc" -ne "3" {
    echo "Usage: $[basename $0] <image_filename> <partition # (1,2,...)> <mount point>" > !2
    exit 1
}

setglobal FILE = $1
setglobal PART = $2
setglobal DEST = $3

if parted --version >/dev/null !2 > !1 { # Prefer as supports GPT partitions
  setglobal UNITS = $[parted -s $FILE unit s print !2 >/dev/null | grep " $PART " |
          tr -d 's' | awk '{print $2}]
} elif fdisk -v >/dev/null !2 > !1 {
  setglobal UNITS = $[fdisk -lu $FILE !2 >/dev/null | grep "$FILE$PART " |
          tr -d '*' | awk '{print $2}]
} else {
  echo "Can't find the fdisk or parted utils. Are you root?" > !2
  exit 1
}

setglobal OFFSET = $[expr 512 '*' $UNITS]
mount -o loop,offset=$OFFSET $FILE $DEST