forked from mirrored-repos/manjaro-tools
78 lines
2 KiB
Bash
78 lines
2 KiB
Bash
# vim: set ft=sh:
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find_dev_by_path () {
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local path="${1}"
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local tmp_mnt=/tmp_mnt
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local _mnt
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local a d
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local device
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[[ "$path" ]] || return 1
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mkdir -p "${tmp_mnt}"
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for a in 1 2 3; do
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for d in $(awk '{ print "/dev/"$4 }' /proc/partitions); do
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# If the device is already mounted, it shouldn't be
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# unmounted after the check.
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grep -q "^$d " /proc/mounts && {
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_mnt=$(grep "^$d " /proc/mounts | cut -d ' ' -f 2)
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unmount=
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} || {
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mount -r -t auto "${d}" "${tmp_mnt}" 2> /dev/null || continue
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_mnt="${tmp_mnt}"
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unmount=true
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}
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# File exists in $d. Save $d on $device.
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[[ -f "${_mnt}/${path}" ]] && device="${d}"
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[[ "${unmount}" ]] && umount "${tmp_mnt}" 2> /dev/null || true
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[[ "${device}" ]] && {
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echo "${device}"
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return
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}
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done
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sleep 1
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done
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return 1
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}
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run_hook () {
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[[ -z "${img_flags}" ]] && img_flags="defaults"
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if [[ "${img_loop}" ]]; then
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img_dev=$(find_dev_by_path "${img_loop}")
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mount_handler="miso_loop_mount_handler"
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fi
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}
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miso_loop_mount_handler () {
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newroot="${1}"
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local _dev_loop
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msg ":: Setup a loop device from ${img_loop} located at device ${img_dev}"
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_mnt_dev "${img_dev}" "/run/miso/img_dev" "-r" "${img_flags}"
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if [[ "${copytoram}" != "y" ]]; then
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echo $(readlink -f ${img_dev}) >> /run/miso/used_block_devices
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fi
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if _dev_loop=$(losetup --find --show --read-only "/run/miso/img_dev/${img_loop}"); then
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misodevice="${_dev_loop}"
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else
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echo "ERROR: Setting loopback device for file '/run/miso/img_dev/${img_loop}'"
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launch_interactive_shell
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fi
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miso_mount_handler ${newroot}
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if [[ "${copytoram}" == "y" ]]; then
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losetup -d ${_dev_loop} 2>/dev/null
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umount /run/miso/img_dev
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else
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echo $(readlink -f ${img_dev}) >> /run/miso/used_block_devices
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fi
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}
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