# @(#) tree: Muestra el arbol de un directorio, adaptado de UnixWorld
# Diego Fernando Marin <dfmarin@technologist.com>, 1994
#
USO="uso: $0 [directory]"
case $# in
    0) DIR="." ;;
    1) if [ ! -d $1 ]; then
       echo "$0: \"$1\" no es un directorio.\n$USO" >&2
       exit 1
       fi
       DIR=$1 ;;
    *) echo $USO >&2
       exit 2 ;;
esac
( cd $DIR; pwd )
find $DIR -type d -print | sort -f |
sed -e "s,^$DIR,," \
    -e "/^$/d" \
    -e "s,[^/]*/\([^/]*\)$,|____ \1," \
    -e "s,[^/]*/,|     ,g"