ISO extfs helper for mc

#! /bin/bash
#
# Writen by Victor Ananjevsky, 2013
#

XORRISO=$(which --skip-alias --skip-functions xorriso 2> /dev/null)
[[ -z $XORRISO ]] && exit 1

function show_iso_dir ()
{
    local dir attr ln usr gr sz dt1 dt2 dt3 nm len name
    dir="$2"
    $XORRISO -dev stdio:"$1" -cd "$dir" -lsl 2> /dev/null | \
        grep "^[-d]" | while read attr ln usr gr sz dt1 dt2 dt3 nm ; do
        len=$((${#nm} - 2))
        name=${nm:1:$len}     # remove quotes
        if [[ ${attr:0:1} != "d" ]]; then
            echo "$attr $ln $usr $gr $sz $dt1 $dt2 $dt3 $dir/$name"
        else
            show_iso_dir "$1" "$dir/$name"
        fi
    done
}

LC_ALL=C

case "$1" in
  list) show_iso_dir "$2" "." ;;
  rm) $XORRISO -dev stdio:"$2" -rm "$3" 2> /dev/null ;;
  rmdir) $XORRISO -dev stdio:"$2" -rmdir "$3" 2> /dev/null ;;
  mkdir) $XORRISO -dev stdio:"$2" -mkdir "$3" 2> /dev/null ;;
  copyin) $XORRISO -dev stdio:"$2" -cpr "$4" "$3" 2> /dev/null ;;
  copyout) $XORRISO -dev stdio:"$2" -osirrox on -extract "$3" "$4" 2> /dev/null ;;
  *) exit 1 ;;
esac

exit 0