[src/trunk]: src/usr.bin/btpin avoid strcpy.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/deee32225d40
branches:  trunk
changeset: 845694:deee32225d40
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Oct 12 17:50:56 2019 +0000

description:
avoid strcpy.

diffstat:

 usr.bin/btpin/btpin.c |  9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diffs (31 lines):

diff -r b719f1f2b44e -r deee32225d40 usr.bin/btpin/btpin.c
--- a/usr.bin/btpin/btpin.c     Sat Oct 12 17:26:26 2019 +0000
+++ b/usr.bin/btpin/btpin.c     Sat Oct 12 17:50:56 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: btpin.c,v 1.7 2017/12/21 09:04:34 plunky Exp $ */
+/*     $NetBSD: btpin.c,v 1.8 2019/10/12 17:50:56 christos Exp $       */
 
 /*-
  * Copyright (c) 2006 Itronix Inc.
@@ -33,7 +33,7 @@
 
 #include <sys/cdefs.h>
 __COPYRIGHT("@(#) Copyright (c) 2006 Itronix, Inc.  All rights reserved.");
-__RCSID("$NetBSD: btpin.c,v 1.7 2017/12/21 09:04:34 plunky Exp $");
+__RCSID("$NetBSD: btpin.c,v 1.8 2019/10/12 17:50:56 christos Exp $");
 
 #include <sys/types.h>
 #include <sys/un.h>
@@ -132,8 +132,11 @@
        } else {
                if (len != -1)
                        usage();
+               len = strlen(pin);
+               if (len > HCI_PIN_SIZE)
+                       len = HCI_PIN_SIZE;
 
-               strncpy((char *)rp.pin, pin, HCI_PIN_SIZE);
+               memcpy(rp.pin, pin, len);
        }
 
        s = socket(PF_LOCAL, SOCK_STREAM, 0);