#!/bin/sh

do_it ( ) 
{
#   change delimiter to ':' instead of whitespace, then change it back

#   input can be file:

#   Jack Kenny:jkenny
	

	OLDIFS=$IFS
	IFS=:
	while read name login; do
		echo "name: $name login: $login"
       		/usr/sbin/useradd -g 100 -d /home/$login -c "$name" \
		-m -k /etc/skel -s /bin/tcsh -o $login
	done
#    change the delimiter back to whitespace
	IFS=$OLDIFS
}

#   if the number of arguments is equal to zero print usage message
if [ $# -eq 0 ]; then
        if [ -t 0 ]; then
            echo "FATAL: Reading data from STDIN." >&2
            echo "       Must either do % $0 < datafile" >&2
            echo "                   or % $0 \"Joe Cool\":login" >&2
            echo "The datafile is expected to have one name and one login per line, separated by a colon." >&2
            exit 2
        fi
#   else life is good print the arguments and call the subroutine
else
        echo $*
fi | do_it