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Don't allow negative args for the -A and -B options, because they

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lead to SIGSEGV in the output formatting code.
Fixes PR 37657 from Jeffrey E. Bedard.
This commit is contained in:
dholland 2008-01-01 17:45:01 +00:00
parent dfd4477d85
commit 5e6732eb9c
1 changed files with 6 additions and 2 deletions
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8
usr.bin/cal/cal.c
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@ -1,4 +1,4 @@
/* $NetBSD: cal.c,v 1.22 2007/12/24 13:56:55 wiz Exp $ */
/* $NetBSD: cal.c,v 1.23 2008/01/01 17:45:01 dholland Exp $ */
/*
* Copyright (c) 1989, 1993, 1994
@ -42,7 +42,7 @@ __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\n\
#if 0
static char sccsid[] = "@(#)cal.c 8.4 (Berkeley) 4/2/94";
#else
__RCSID("$NetBSD: cal.c,v 1.22 2007/12/24 13:56:55 wiz Exp $");
__RCSID("$NetBSD: cal.c,v 1.23 2008/01/01 17:45:01 dholland Exp $");
#endif
#endif /* not lint */
@ -232,9 +232,13 @@ main(int argc, char **argv)
switch (ch) {
case 'A':
after = getnum(optarg);
if (after < 0)
errx(1, "Argument to -A must be positive");
break;
case 'B':
before = getnum(optarg);
if (before < 0)
errx(1, "Argument to -B must be positive");
break;
case 'd':
dow = getnum(optarg);