-try_mount ()
-{
- dev="${1}"
- mountp="${2}"
- opts="${3}"
-
- if where_is_mounted ${dev} > /dev/null; then
- mount -o remount,"${opts}" ${dev} $(where_is_mounted ${dev}) || panic "Remounting failed"
- mount -o bind $(where_is_mounted ${dev}) ${mountp} || panic "Cannot bind-mount"
- else
- mount -t $(get_fstype "${dev}") -o "${opts}" "${dev}" "${mountp}" || panic "Cannot mount ${dev} on ${mountp}"
- fi
-}
-
-find_cow_device() {
- pers_label="${1}"
- cow_backing="/${pers_label}-backing"
- for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
- for dev in $(subdevices "${sysblock}"); do
- devname=$(sys2dev "${dev}")
- if [ "$(/lib/udev/vol_id -l $devname 2>/dev/null)" = "${pers_label}" ]; then
- echo "$devname"
- return
- elif [ "$(get_fstype ${devname})" = "vfat" ]; then # FIXME: all supported block devices should be scanned
- mkdir -p "${cow_backing}"
- try_mount "${devname}" "${cow_backing}" "rw"
- if [ -e "${cow_backing}/${pers_label}" ]; then
- echo $(setup_loop "${cow_backing}/${pers_label}" "loop" "/sys/block/loop*")
- return 0
- else
- umount ${cow_backing}
- fi
- fi
- done
- done
-}
-
-find_files()
-# return the first of $filenames found on vfat and ext2 devices
-# FIXME: merge with above function
-{
- filenames="${1}"
- snap_backing="/snap-backing"
- for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
- for dev in $(subdevices "${sysblock}"); do
- devname=$(sys2dev "${dev}")
- devfstype="$(get_fstype ${devname})"
- if [ "${devfstype}" = "vfat" ] || [ "${devfstype}" = "ext2" ] ; then # FIXME: all supported block devices should be scanned
- mkdir -p "${snap_backing}"
- try_mount "${devname}" "${snap_backing}" "ro"
- for filename in ${filenames}; do
- if [ -e "${snap_backing}/${filename}" ]; then
- echo "${devname} ${snap_backing} ${filename}"
- return 0
- fi
- done
- umount ${snap_backing}
- fi
- done
- done
-}
-