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[archiso] Add support for img_label= and allow img_dev same as cow_dev

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* Support img_label=
* Allow use img_dev= as cow_device=
* Use new function _mnt_dev() from archiso.
* Check for error while setting loopback device.

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>
This commit is contained in:
Gerardo Exequiel Pozzi 2011-10-23 21:24:17 -03:00
parent 90fb8ea480
commit 908551ef02
2 changed files with 20 additions and 19 deletions
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4
README
View File

@ -79,8 +79,10 @@ INDEX
** hooks/archiso_loop_mnt
* img_dev= Device where archiso-image.iso reside.
* img_label= Set the filesystem label where archiso-image.iso.
Default: (unset)
* img_dev= Device where archiso-image.iso reside.
Default: (unset) or "/dev/disk/by-label/${img_label}"
* img_loop= Full path where archiso-image.iso is located on ${img_dev}
Default: (unset)

35
archiso/hooks/archiso_loop_mnt
View File

@ -1,7 +1,8 @@
# vim: set ft=sh:
run_hook () {
if [ -n "${img_dev}" ] && [ -n "${img_loop}" ]; then
[[ -n "${img_label}" ]] && img_dev="/dev/disk/by-label/${img_label}"
if [[ -n "${img_dev}" && -n "${img_loop}" ]]; then
mount_handler="archiso_loop_mount_handler"
fi
}
@ -9,30 +10,28 @@ run_hook () {
archiso_loop_mount_handler () {
newroot="${1}"
msg ":: Waiting for boot device..."
while ! poll_device ${img_dev} 30; do
echo "ERROR: boot device didn't show up after 30 seconds..."
msg ":: Setup a loop device from ${img_loop} located at device ${img_dev}"
if [[ "${img_dev}" -ef "${cow_device}" ]]; then
_mnt_dev "${img_dev}" "/run/archiso/img_dev"
else
_mnt_dev "${img_dev}" "/run/archiso/img_dev" "-r"
fi
_dev_loop=$(losetup -f)
if ! losetup "${_dev_loop}" "/run/archiso/img_dev/${img_loop}"; then
echo "ERROR: Setting loopback device '${_dev_loop}'"
echo " for file '/run/archiso/img_dev/${img_loop}'"
echo " Falling back to interactive prompt"
echo " You can try to fix the problem manually, log out when you are finished"
launch_interactive_shell
done
msg "::: Setup a loop device from ${img_loop} located at device ${img_dev}"
FSTYPE=$(blkid -o value -s TYPE -p ${img_dev} 2> /dev/null)
if [ -n "${FSTYPE}" ]; then
mkdir -p /run/archiso/img_dev
if mount -r -t "${FSTYPE}" ${img_dev} /run/archiso/img_dev > /dev/null 2>&1; then
_dev_loop=$(losetup -f)
losetup ${_dev_loop} /run/archiso/img_dev/${img_loop}
fi
fi
archiso_mount_handler ${newroot}
if [ "${copytoram}" = "y" ]; then
msg "::: Deataching loop device ${_dev_loop}"
if [[ "${copytoram}" == "y" ]]; then
losetup -d ${_dev_loop}
msg "::: Unmounting ${img_dev}"
umount ${img_dev}
umount /run/archiso/img_dev
else
echo ${_dev_loop} > /run/archiso/img_dev_loop
fi
}