if test $# = 0 ; then
    echo need 1 arg
else
    rm -f user.o user user.c
    if test -r $1 ; then
	echo ln -s $1 user.c
	ln -s $1 user.c
    elif test -r ../../usertest/$1 ; then
	echo ln -s ../../usertest/$1 user.c
	ln -s ../../usertest/$1 user.c
    elif test -r $1.c ; then
	echo ln -s $1.c user.c
	ln -s $1.c user.c
    elif test -r ../../usertest/$1.c ; then
	echo ln -s ../../usertest/$1.c user.c
	ln -s ../../usertest/$1.c user.c
    else
	echo Can not find $1.
    fi
fi
