Add basic_mount_image.sh

shell_utils/basic_mount_image.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# This script will mount a given image in loop mode.
+# Make sure to change the path and offsets for the image you use. You can get
+# the correct offsets using `file $PATH_TO_IMAGE` or fdisk.
+
+# To make debugging easier
+echo "KittenGroomer: in mount_image.sh" 1>&2
+
+if [ "$(id -u)" != "0" ]; then
+   echo "This script must be run as root" 1>&2
+   exit 1
+fi
+
+set -e
+set -x
+
+# Double check the path and offsets as noted above!
+# Path to the image
+IMAGE='/media/sf_ubuntu-shared/2017-02-02_CIRCLean.img'
+# Start sector of boot (first) partition
+BOOT_START=8192
+# Start sector of root (second) partition
+ROOT_START=137216
+# Locations you'd like the partitions mounted
+BOOT_PATH='/mnt/rpi-boot'
+ROOTFS_PATH='/mnt/rpi-root'
+
+# Calculate offsets for each partition
+offset_boot=$((${BOOT_START} * 512))
+offset_rootfs=$((${ROOT_START} * 512))
+# TODO: add logic for creating directories if they aren't already there
+mkdir -p ${BOOT_PATH}
+mkdir -p ${ROOTFS_PATH}
+# Mount each partition in loop mode
+mount -o loop,offset=${offset_boot} ${IMAGE} ${BOOT_PATH}
+mount -o loop,offset=${offset_rootfs} ${IMAGE} ${ROOTFS_PATH}
+
+echo "Image mounted" 1>&2