Locally mounting a Raspberry Pi Raspbian Linux image

mount-raspbian-image

#!/bin/bash
#
# Usage: sudo ./mount-raspbian-image <imagename> 
#

if [ -z "$1" ]
  then
    echo "Usage: sudo ./mount-raspbian-image <imagename>"
    exit
fi

IMG=$1

# Capture the patition details.
BOOT_PARTITION=`fdisk -l "$IMG" | grep "c W95 FAT32 (LBA)"`
ROOT_PARTITION=`fdisk -l "$IMG" | grep "83 Linux"` 

# Grab the starting sector of the partitions.
BOOT_START_SECTOR=`echo "$BOOT_PARTITION" | awk '{print $2}'`
ROOT_START_SECTOR=`echo "$ROOT_PARTITION" | awk '{print $2}'` 

# Calculate the start byte of the partitions.
((BOOT_START_BYTE=$BOOT_START_SECTOR * 512))
((ROOT_START_BYTE=$ROOT_START_SECTOR * 512))

# Grab the sector length of the partitions.
BOOT_SECTOR_LENGTH=`echo "$BOOT_PARTITION" | awk '{print $4}'`
ROOT_SECTOR_LENGTH=`echo "$ROOT_PARTITION" | awk '{print $4}'` 

# Calculate the byte length of the partitions.
((BOOT_BYTE_LENGTH=$BOOT_SECTOR_LENGTH * 512))
((ROOT_BYTE_LENGTH=$ROOT_SECTOR_LENGTH * 512))

# Create the mount points.
sudo mkdir -p /mnt/image/boot
sudo mkdir -p /mnt/image/root

# Mount the partitions to the mount points.
mount -v -o offset=$BOOT_START_BYTE,sizelimit=$BOOT_BYTE_LENGTH -t vfat "$IMG" /mnt/image/boot
mount -v -o offset=$ROOT_START_BYTE,sizelimit=$ROOT_BYTE_LENGTH -t ext4 "$IMG" /mnt/image/root