VOLUME_NAME=`grep " btrfs " /etc/fstab \
| grep "subvol=" \
| grep " $VOLUME_PATH " \
- | sed -r 's|.*subvol=([[:alnum:]]*).*|\1|'`
+ | sed -r 's|.*subvol=([^, \t]*).*|\1|'`
if [ -z "$VOLUME_NAME" -a "$VOLUME_PATH" = "/" ]; then
VOLUME_NAME=`btrfs subvolume get-default / | cut -d' ' -f9`
fi