lftp bookmark wrapper for listing files on a nas

ls_nas.sh

#!/bin/bash

#suppose we have a NAS bookmarked as music w/audio stored in "artist/album" format: 
# ls_nas.sh music           #list all artists
# ls_nas.sh music L         #list all arists starting w/L
# ls_nas.sh music L*/       #list all albums of artists starting w/L

if [[ "$#" < 1 ]]; then
  echo "ls_nas.sh <bookmark> [glob]"
  echo " "
  echo "Bookmarks:"
  lftp -e "bookmark list; quit"
  exit 1
fi

bookmark=$1
glob="*"

if [[ "$#" >1 ]]; then
    glob="$(echo $2 | sed 's/ /\\ /g')*"
fi

lftp ${bookmark} -e "cls -1d ${glob}; quit" |  sed 's/^.* \///g' | column