From 85ae0e1b52487adfe8f06509f5e02bc089d3702e Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Tue, 19 Sep 2023 06:34:26 -0500
Subject: [PATCH] Michael Shavit pointed out strtoul->strtoull and requested
 checking errno (presumably to catch overflow that doesn't leave unconsumed
 digits).

---
 toys/other/devmem.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/toys/other/devmem.c b/toys/other/devmem.c
index 4d558fb4..137e60c4 100644
--- a/toys/other/devmem.c
+++ b/toys/other/devmem.c
@@ -20,9 +20,11 @@ config DEVMEM
 unsigned long long atollu(char *str)
 {
   char *end = str;
-  unsigned long long llu = strtoul(str, &end, 0);
+  unsigned long long llu;
 
-  if (*end) error_exit("bad %s", str);
+  errno = 0;
+  llu = strtoull(str, &end, 0);
+  if (*end || errno) perror_exit("bad %s", str);
 
   return llu;
 }
-- 
2.39.2