From edf882c32d172bbc6533b1805a2ccc1dafd72403 Mon Sep 17 00:00:00 2001
From: op <op@openbsd.org>
Date: Tue, 27 Aug 2024 18:45:58 +0000
Subject: [PATCH] ksh: use strtonum() in findhistrel()

ok millert@, deraadt@
---
 bin/ksh/history.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/bin/ksh/history.c b/bin/ksh/history.c
index c768563496e..6f4a1c8e571 100644
--- a/bin/ksh/history.c
+++ b/bin/ksh/history.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: history.c,v 1.84 2019/10/27 15:02:19 jca Exp $	*/
+/*	$OpenBSD: history.c,v 1.85 2024/08/27 18:45:58 op Exp $	*/
 
 /*
  * command history
@@ -507,19 +507,19 @@ findhist(int start, int fwd, const char *str, int anchored)
 int
 findhistrel(const char *str)
 {
+	const char *errstr;
 	int	maxhist = histptr - history;
 	int	start = maxhist - 1;
-	int	rec = atoi(str);
+	int	rec;
+
+	rec = strtonum(str, -maxhist, maxhist, &errstr);
+	if (errstr)
+		return -1;
 
 	if (rec == 0)
 		return -1;
-	if (rec > 0) {
-		if (rec > maxhist)
-			return -1;
+	if (rec > 0)
 		return rec - 1;
-	}
-	if (rec > maxhist)
-		return -1;
 	return start + rec + 1;
 }
 
-- 
2.20.1