Function test_flopen_lock_child

tools/libutil/tests/flopen_test.c:151–180

* Test that child processes inherit the lock */

 * Test that child processes inherit the lock
 */
const char *
test_flopen_lock_child(void)
{
	const char *fn = "test_flopen_lock_child";
	const char *result = NULL;
	pid_t pid;
	volatile int fd1, fd2;

	unlink(fn);
	fd1 = flopen(fn, O_RDWR|O_CREAT, 0640);
	if (fd1 < 0) {
		result = strerror(errno);
	} else {
		pid = fork();
		if (pid == -1) {
			result = strerror(errno);
		} else if (pid == 0) {
			select(0, 0, 0, 0, 0);
			_exit(0);
		}
		close(fd1);
		if ((fd2 = flopen(fn, O_RDWR|O_NONBLOCK)) != -1) {
			result = "second open succeeded";
			close(fd2);
		}
		kill(pid, SIGINT);
	}
	unlink(fn);
	return (result);
}

static struct test {
	const char *name;