reboot: Disallow -k and -r, it doesn't make sense.

When we're re-rooting to a new /, there is no next kernel. Error out
rather than leaving a timebomb in /boot/nextboot.conf.

Sponsored by:		Netflix
Reviewed by:		kevans, kib, emaste
Differential Revision:	https://reviews.freebsd.org/D43800

This commit is contained in:

Warner Losh

2024-02-12 11:44:43 -07:00

parent ac4847e6b0

commit a78bc42bcc

1 changed files with 2 additions and 0 deletions

									
										sbin/reboot/reboot.c
									
		+2
		
												View File
												
				@@ -115,6 +115,8 @@ main(int argc, char *argv[])

						errx(1, "-c and -p cannot be used together");

					if ((howto & RB_REROOT) != 0 && howto != RB_REROOT)

						errx(1, "-r cannot be used with -c, -d, -n, or -p");

					if ((howto & RB_REROOT) != 0 && kernel != NULL)

						errx(1, "-r and -k cannot be used together, there is no next kernel");

					if (geteuid()) {

						errno = EPERM;

						err(1, NULL);