Listing 2

:
#
# all [pathname] <asciis | execs | dirs | scripts
# Add tree search functionality to the asciis, execs,
# dirs and scripts commands.  If [pathname] is not
# specified, search begins from current
# working directory "."
#
if [ $# -lt 1 ]
then
echo "usage: $0 [pathname] <asciis | execs | dirs | scripts"
exit 1
fi

if [ $# -ne 2 ]
then
TOP="."
PROG=$1
else
TOP=$1
PROG=$2
fi

find $TOP -exec $PROG {};