Commit f49896d7 authored by Willy Tarreau's avatar Willy Tarreau Committed by Paul E. McKenney
Browse files

selftests/nolibc: exit with poweroff on success when getpid() == 1 



The idea is to ease automated testing under qemu. If the test succeeds
while running as PID 1, indicating the system was booted with init=/test,
let's just power off so that qemu can exit with a successful code. In
other situations it will exit and provoke a panic, which may be caught
for example with CONFIG_PVPANIC.

Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 95bc9894

tools/testing/selftests/nolibc/nolibc-test.c

+14 −0
Original line number Diff line number Diff line
@@ -626,6 +626,20 @@ int main(int argc, char **argv, char **envp) 
	}



	printf("Total number of errors: %d\n", ret);



	if (getpid() == 1) {

		/* we're running as init, there's no other process on the

		 * system, thus likely started from a VM for a quick check.

		 * Exiting will provoke a kernel panic that may be reported

		 * as an error by Qemu or the hypervisor, while stopping

		 * cleanly will often be reported as a success. This allows

		 * to use the output of this program for bisecting kernels.

		 */

		printf("Leaving init with final status: %d\n", !!ret);

		if (ret == 0)

			reboot(LINUX_REBOOT_CMD_POWER_OFF);

	}



	printf("Exiting with status %d\n", !!ret);

	return !!ret;

}