#! /bin/sh
#
# ext - Print extensions data.
#
PATH=/bin:/usr/bin:/local/bin:/usr/sco/bin
IFS=" 	
"
export PATH IFS

#
# Setup variables.
#
prog=`basename $0`

#
# Define exit codes.
#
: ${OK=0} ${FAIL=1} ${STOP=10} ${HALT=11}

#
# Procedures.
#
usage () {
	echo "Usage:	$prog [ search_key ] ..."
	cleanup $FAIL
}

error () {
	#
	# Issue an error message.
	#
	echo "ERROR:	$1."
}

cleanup () {
	exit $1
}

#
######## main ########
#
LIST="/usr/sco/lib/extensions"

#
# Parse arguments.
#
while getopts h arg
do
	case $arg in
		h)
			usage
			;;
	esac
done

#
# Make sure the LIST is readable.
#
if [ ! -r $LIST ]
then
	error "Cannot read $LIST"
	cleanup $FAIL
fi

case $# in
	0)
		cat $LIST
		;;
	*)
		for arg in "$@"
		do
			grep -y "${arg}" $LIST
		done
		;;
esac

cleanup $OK