From 5757e9ac3ed9dd21f0db13c012c60ea7c9fa268f Mon Sep 17 00:00:00 2001
From: Ray Lai <ray@cvs.openbsd.org>
Date: Wed, 6 Dec 2006 05:05:17 +0000
Subject: Don't access buf[strlen(buf) - 1] for zero-length strings.

OK jaredy@.
---
 usr.sbin/config/mkmakefile.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'usr.sbin/config/mkmakefile.c')

diff --git a/usr.sbin/config/mkmakefile.c b/usr.sbin/config/mkmakefile.c
index 7d12f1113e5..b0079afaf8c 100644
--- a/usr.sbin/config/mkmakefile.c
+++ b/usr.sbin/config/mkmakefile.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mkmakefile.c,v 1.20 2006/05/06 11:31:46 espie Exp $	*/
+/*	$OpenBSD: mkmakefile.c,v 1.21 2006/12/06 05:05:16 ray Exp $	*/
 /*	$NetBSD: mkmakefile.c,v 1.34 1997/02/02 21:12:36 thorpej Exp $	*/
 
 /*
@@ -391,6 +391,10 @@ emitrules1(FILE *fp, const char *suffix, const char *rule_prefix, int ruleindex)
 			return (1);
 		if ((cp = fi->fi_mkrule[ruleindex]) == NULL) {
 			cp = rule_prefix;
+			if (fpath[0] == '\0') {
+				errno = ENOENT;
+				return (1);
+			}
 			ch = fpath[strlen(fpath) - 1];
 			if (islower(ch))
 				ch = toupper(ch);
-- 
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