Re: CVS commit: src/tests/kernel

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Sun, 6 Nov 2016 16:24:16 +0000
    From:        "Kamil Rytarowski" <kamil%netbsd.org@localhost>
    Message-ID:  <20161106162416.95D77FBA6%cvs.NetBSD.org@localhost>

  | assert_pid1 asserts that non-root user cannot attach to PID 1 as it is the
  | /dev/init process. This tests is skipped if run as root.

There's no need to skip it, just

	child=fork(); 	/* err if -1 */
	if (child == 0) {
		(void)setuid(10);
		if (ptrace(.....) < 0)
			_exit(errno);
		else
			_exit(0);
	}
	waitpid(child, &status, 0);
	/* and check status */

If you're root, the setuid() works, and the child isn't root any more.
if you happened to be uid(10), the setuid() is a no-op, if you were some
other user the setuid() fails, but you don't care.

kre