58 lines
1.4 KiB
Bash
Executable file
58 lines
1.4 KiB
Bash
Executable file
#!/usr/bin/env bash
|
|
|
|
set -e
|
|
|
|
function print_help() {
|
|
echo "$0: get a chroot shell inside of a Raspbian ISO"
|
|
echo "Usage: $0 target.img"
|
|
echo " -h Print this help"
|
|
echo " -i [target] Specify an ISO to chroot to (probably a Pi Foundation Raspbian)"
|
|
exit 1
|
|
}
|
|
|
|
args=$(getopt -uo 'ht:i:' -- $*)
|
|
[ $? != 0 ] && print_help
|
|
set -- $args
|
|
|
|
for i
|
|
do
|
|
case "$i"
|
|
in
|
|
-h)
|
|
print_help
|
|
;;
|
|
-i)
|
|
target_image="$2"
|
|
echo "Image = ${2}"
|
|
shift
|
|
shift
|
|
;;
|
|
esac
|
|
done
|
|
|
|
if [[ $EUID -ne 0 ]]; then
|
|
echo "$0 must be run as root. try: sudo $0"
|
|
exit 1
|
|
fi
|
|
|
|
target_mnt="/media/raspbian-target"
|
|
|
|
# assemble a mostly-legit filesystem by mounting / and /boot from the target
|
|
# iso, plus /dev from the host pi (/dev/(u)random seems to be required by
|
|
# recent versions of GPG):
|
|
echo "Mounting $target_image on $target_mnt"
|
|
kpartx -av $target_image
|
|
mkdir -p $target_mnt
|
|
mount /dev/dm-1 $target_mnt
|
|
mount /dev/dm-0 $target_mnt/boot
|
|
mkdir -p $target_mnt/dev
|
|
mount --bind /dev $target_mnt/dev
|
|
|
|
echo "Dropping you into Bash - image will be unmounted after exit"
|
|
chroot $target_mnt sudo /bin/bash
|
|
|
|
echo "Unmounting $target_image"
|
|
umount $target_mnt/boot
|
|
umount $target_mnt/dev
|
|
umount $target_mnt
|
|
kpartx -d $target_image
|