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Fix umount_image (#22)

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* export-noobs/prerun.sh: Use nested mountpoint

While it seems elegant and intuitive to use separate bootfs and rootfs
mountpoints for compressing the partitions, doing so violates a
precondition of unmount_image that they be mounted as a tree.  This
causes the image to not be properly unmounted and detached.  A better
solution might be to pack up the previous stage's chroot directory, but
that rework can wait for the time being.

scripts/common.sh: Output device name correctly

A misplaced ) in unmount_image caused the loop device to be incorrectly
identified, resulting in a fair bit of chaos trying to unmount other
filesystems on /dev/mapper devices.  Such as / on a LUKS-encrypted
installation, for example.  The unmount will fail as it should and
build.sh will abort the build without any cleanup.  Best to avoid that.

These changes close RPi-Distro/pi-gen#19
This commit is contained in:
Joseph Carter 2016-10-06 02:14:43 -07:00 • committed by XECDesign
parent 1d18e27f9c
commit d1f766d2b8
2 changed files with 4 additions and 5 deletions
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7
export-noobs/prerun.sh
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@ -14,13 +14,12 @@ BOOT_DEV=/dev/mapper/${LOOP_DEV}p1
ROOT_DEV=/dev/mapper/${LOOP_DEV}p2
mkdir -p ${STAGE_WORK_DIR}/rootfs
mkdir -p ${STAGE_WORK_DIR}/bootfs
mkdir -p ${NOOBS_DIR}
mount $ROOT_DEV ${STAGE_WORK_DIR}/rootfs
mount $BOOT_DEV ${STAGE_WORK_DIR}/bootfs
mount $BOOT_DEV ${STAGE_WORK_DIR}/rootfs/boot
tar -I pxz -C ${STAGE_WORK_DIR}/bootfs -cpf ${NOOBS_DIR}/boot.tar.xz .
tar -I pxz -C ${STAGE_WORK_DIR}/rootfs -cpf ${NOOBS_DIR}/root.tar.xz .
tar -I pxz -C ${STAGE_WORK_DIR}/rootfs/boot -cpf ${NOOBS_DIR}/boot.tar.xz .
tar -I pxz -C ${STAGE_WORK_DIR}/rootfs --one-file-system -cpf ${NOOBS_DIR}/root.tar.xz .
unmount_image ${IMG_FILE}

2
scripts/common
View file

@ -52,7 +52,7 @@ unmount_image(){
sleep 1
local LOOP_DEV=$(losetup -j ${1} | cut -f1 -d':')
if [ -n "${LOOP_DEV}" ]; then
local MOUNTED_DIR=$(mount | grep $(basename ${LOOP_DEV} | head -n 1 | cut -f 3 -d ' '))
local MOUNTED_DIR=$(mount | grep $(basename ${LOOP_DEV}) | head -n 1 | cut -f 3 -d ' ')
if [ -n "${MOUNTED_DIR}" ]; then
unmount $(dirname ${MOUNTED_DIR})
fi