Circlean/mount_image.sh

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#!/bin/bash
# This script will mount a given image or sd card 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.
# If you want to mount an SD card, unset $IMAGE.
# To make debugging easier
echo "KittenGroomer: in mount_image.sh" 1>&2
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if [ "$(id -u)" != "0" ]; then
echo "This script must be run as root" 1>&2
exit 1
fi
ls /usr/bin/qemu*arm*
if [ -z $? ]; then
echo "You need qemu user static binaries." 1>&2
exit 1
fi
if [ -z "$1" ]; then
echo "Please tell me what do to after mounting everything..."
exit
fi
COMMAND=${1}
COMMAND_OPT=${2}
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set -e
set -x
# If you use a partition...
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PARTITION_ROOTFS='/dev/mmcblk0p2'
PARTITION_BOOT='/dev/mmcblk0p1'
#PARTITION_ROOTFS='/dev/sdd2'
#PARTITION_BOOT='/dev/sdd1'
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# If you use the img...
# Double check the path and offsets as noted above!
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##### Debian
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IMAGE='2017-02-02_CIRCLean.img'
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OFFSET_BOOT=$((8192 * 512))
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OFFSET_ROOTFS=$((137216 * 512))
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CHROOT_PATH='/mnt/arm_rPi'
clean(){
mv ${CHROOT_PATH}/etc/ld.so.preload_backup ${CHROOT_PATH}/etc/ld.so.preload
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rm ${CHROOT_PATH}/etc/resolv.conf
rm ${CHROOT_PATH}/usr/bin/qemu*arm*
umount ${CHROOT_PATH}/dev/pts
#umount ${CHROOT_PATH}/dev/shm
umount ${CHROOT_PATH}/dev
umount ${CHROOT_PATH}/run
umount ${CHROOT_PATH}/proc
umount ${CHROOT_PATH}/sys
umount ${CHROOT_PATH}/tmp
umount ${CHROOT_PATH}/boot
umount ${CHROOT_PATH}
rm -rf ${CHROOT_PATH}
}
trap clean EXIT TERM INT
# enforce the CPU in order to have the armv6 instructions set (and compile working packages...)
export QEMU_CPU=arm1176
#export QEMU_STRACE=1
mkdir -p ${CHROOT_PATH}
if [ ! -z ${IMAGE} ]; then
mount -o loop,offset=${OFFSET_ROOTFS} ${IMAGE} ${CHROOT_PATH}
mount -o loop,offset=${OFFSET_BOOT} ${IMAGE} ${CHROOT_PATH}/boot
elif [ -a ${PARTITION_ROOTFS} ]; then
mount ${PARTITION_ROOTFS} ${CHROOT_PATH}
mount ${PARTITION_BOOT} ${CHROOT_PATH}/boot
else
echo 'You need a SD card or an image'
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exit
fi
cp /usr/bin/qemu*arm* ${CHROOT_PATH}/usr/bin/
mount -o bind /run ${CHROOT_PATH}/run
mount -o bind /dev ${CHROOT_PATH}/dev
mount -t devpts pts ${CHROOT_PATH}/dev/pts
#mount -o bind /dev/shm ${CHROOT_PATH}/dev/shm
mount -t proc none ${CHROOT_PATH}/proc
mount -t sysfs none ${CHROOT_PATH}/sys
mount -o bind /tmp ${CHROOT_PATH}/tmp
cp -pf /etc/resolv.conf ${CHROOT_PATH}/etc
mv ${CHROOT_PATH}/etc/ld.so.preload ${CHROOT_PATH}/etc/ld.so.preload_backup
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# To make debugging easier
echo "KittenGroomer: Image mounted, executing command from mount_image.sh" 1>&2
${COMMAND} ${CHROOT_PATH} ${COMMAND_OPT}