From 4fe8c1b67be0f8f7ecdefea1aee93a5f0eb64f88 Mon Sep 17 00:00:00 2001
From: Giorgos Keramidas <keramida@FreeBSD.org>
Date: Sat, 22 Mar 2003 09:23:29 +0000
Subject: [PATCH] Add error and range checking to strtoul() to avoid ending up
 with a delay time of ULONG_MAX when -I is passed a non-numeric arg.

---
 usr.sbin/gstat/gstat.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/usr.sbin/gstat/gstat.c b/usr.sbin/gstat/gstat.c
index 6c6c4ad20af5..82429353576a 100644
--- a/usr.sbin/gstat/gstat.c
+++ b/usr.sbin/gstat/gstat.c
@@ -75,7 +75,8 @@ main(int argc, char **argv)
 		case 'I':
 			p = NULL;
 			i = strtoul(optarg, &p, 0);
-			if (p == optarg) {
+			if (p == optarg || errno == EINVAL ||
+			    errno == ERANGE) {
 				errx(1, "Invalid argument to -I");
 			} else if (!strcmp(p, "s"))
 				i *= 1000000;