From 2f33682035877819fad0af6b10ac9ba557d29f5c Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <phil@teuwen.org>
Date: Tue, 9 Apr 2019 20:05:27 +0200
Subject: [PATCH] use sizeof

---
 client/cmdhf15.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/client/cmdhf15.c b/client/cmdhf15.c
index 086039d13..faf77646a 100644
--- a/client/cmdhf15.c
+++ b/client/cmdhf15.c
@@ -1242,7 +1242,7 @@ int CmdHF15Write(const char *Cmd) {
     char *cmd = cmdbuf;
     char *cmd2;
 
-    strncpy(cmd, Cmd, 99);
+    strncpy(cmd, Cmd, sizeof(cmdbuf) - 1);
 
     if (!prepareHF15Cmd(&cmd, &c, ISO15_CMD_WRITE))
         return 0;