F_TEST
return( lockf(fd, F_TEST, 0L) );
case F_TEST:
if (lockf(fd, F_TEST, 0) < 0) {
if (lockf(fd, F_TEST, 0) < 0) {
if (lockf(Lckfd, F_TEST, 0L) == -1)
return (lockf(fd, F_TEST, 0L));
case F_TEST:
st = lockf(fd, F_TEST, 1);
st = lockf(fileno(fp), F_TEST, 1);
st = lockf(fd, F_TEST, 1);