#!/bin/bash
# version: 0.3.6-r12

print_usage()
{
	echo "$(basename $0 .sh) adds groups to /etc/group."
	echo " USAGE:    $(basename $0 .sh) -o OPTIONS GROUP_NAME .."
	echo
	echo " OPTIONS:  -o \"OPTS\"all options from /usr/sbin/groupadd can be used."
	echo
	echo " Examples:"
	echo "    $(basename $0 .sh) -o \"-g 22\" sshd"
	echo
}

while getopts "o:-" opt ; do
	case "${opt}" in
		o)
			GROUP_OPTS="${OPTARG}"
			;;

		-) break
			;;

		*)
			print_usage
			exit 1
			;;
	esac
done
shift $(($OPTIND - 1))

#exit if $1 is zero
if [ -z "$1" ]
then
	print_usage
	exit 1
fi

GROUP_TO_ADD="$1"

#start nscd to cache /etc/group
$(which nscd) -i group
# get the info
my_group="$(getent group ${GROUP_TO_ADD})"

# if above entries are empty the user/group does not exist
if [ -z "${my_group}" ]
then
	echo "     Adding group '${GROUP_TO_ADD}' ..."
	groupadd ${GROUP_OPTS} "${GROUP_TO_ADD}"
else
	echo "     Modifing group '${GROUP_TO_ADD}' ..."
	groupmod ${GROUP_OPTS} "${GROUP_TO_ADD}"
fi