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Exit with usage when extra arguments are on command line

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preventing mistakes such as "halt 0p" for "halt -p".
Approved by:	bde (mentor), phk (mentor)
MFC after:	1 week
This commit is contained in:
rgrimes 2018-04-05 15:00:08 +00:00
parent 5f1547e410
commit 0b35cef2b2
1 changed files with 2 additions and 0 deletions
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2
sbin/reboot/reboot.c
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@ -116,6 +116,8 @@ main(int argc, char *argv[])
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
if ((howto & (RB_DUMP | RB_HALT)) == (RB_DUMP | RB_HALT))
errx(1, "cannot dump (-d) when halting; must reboot instead");