#!/bin/sh
# add-services
#
# Add the following lines to /etc/services, or NIS "services" map
# 	skkserv		1178/tcp
# 
# You can do it by hand.  If you want so, answer 'no' to the question.

# will not check if I am "root"
#USER=`whoami`
#if test $USER != "root"
#then
# echo "You are not a superuser !"
# exit 1
#fi

case $1 in

0)	# do nothing
	echo "There is nothing to do."
	exit 0
;;

1) 	# not using NIS
if grep skkserv /etc/services; then
	echo "The service \"skkserv\" already exists in the file \"/etc/services\"."
	echo "You have nothing to do about services."
	exit 0
else
	echo "I will add an entry for skkserv into \"/etc/services\"."
	echo -n "Can I do it now (yes or no) ?"
	read answer
	case xx$answer in
	xxy*)
		/bin/rm -f /etc/services.org
		/bin/cp /etc/services /etc/services.org
  		echo "skkserv		1178/tcp" >> /etc/services
  		echo "Adding the new service \"skkserv\" DONE!"
		exit 0
		;;
	*)	echo "You should add the following line to \"/etc/services\" by hand."
  		echo "skkserv		1178/tcp"
		exit 0
		;;
	esac
fi
;;
2)	# NIS master server
if ypcat services | grep skkserv ; then
	echo "The service \"skkserv\" already exists in NIS \"services\" map."
	echo "You have nothing to do about services."
	exit 0
else
	echo "I will add an entry for skkserv into NIS \"services\" map"
	echo -n "Can I do it now (yes or no) ?"
	read answer
	case xx$answer in
	xxy*)
		echo -n "Where is NIS map directory (default is /var/yp) ?"
		read answer
		case xx$answer in
		xx) MAPDIR=/var/yp
		    ;;
		*)  MAPDIR=$answer
		    ;;
		esac
		if test ! -d $MAPDIR
		then
		  echo "Such a directory does not exist. Please check it."
		  exit 1
		fi
		/bin/rm -f /etc/services.org
		/bin/cp /etc/services /etc/services.org
 		echo "skkserv		1178/tcp" >> /etc/services
		(cd $MAPRDIR; make services)
 		echo "Adding skkserv into NIS \"services\" map DONE!"
		exit 0
		;;
	*)	echo "You should (as the superuser) "
		echo "(1) add the following line to \"/etc/services\","
 			echo "skkserv		1178/tcp"
		echo "(2) do \"chdir /var/yp; make services\"."
		exit 0
		;;
	esac
fi
;;

3)	# NIS non-master 
if ypcat services | grep skkserv ; then
	echo "The service \"skkserv\" already exists in NIS \"services\" map."
	echo "You have nothing to do about services."
	exit 0
else
	echo "You should modify NIS \"services\" map, but it can only be done"
	echo "on NIS master server (NOT this host, according to your answer)."
	echo "Do the following on NIS master server."
	echo "  (1) Become the superuser."
	echo "  (2) Add the following line by hand."
	echo "skkserv		1178/tcp"
	echo "  (3) do \"chdir /var/yp; make services\"."
	echo "If you cannot become the superuser of NIS-master server,"
	echo "ask an appropriate person to modify NIS map as above."
	exit 0
fi
;;

*)	echo "Usage:	sh add-services n	(n=0,1,2,3)"
	exit 1
;;
esac