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

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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
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2
sbin/reboot/reboot.c
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@ -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);