- 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
+ 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