[src/trunk]: src/usr.bin/checknr properly terminate a string after strncpy().

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

details:   https://anonhg.NetBSD.org/src/rev/51e6574f062d
branches:  trunk
changeset: 378429:51e6574f062d
user:      mrg <mrg%NetBSD.org@localhost>
date:      Tue Apr 13 01:38:04 2021 +0000

description:
properly terminate a string after strncpy().

diffstat:

 usr.bin/checknr/checknr.c |  5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diffs (26 lines):

diff -r dba3a393aa01 -r 51e6574f062d usr.bin/checknr/checknr.c
--- a/usr.bin/checknr/checknr.c Tue Apr 13 01:15:57 2021 +0000
+++ b/usr.bin/checknr/checknr.c Tue Apr 13 01:38:04 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: checknr.c,v 1.24 2013/08/12 14:03:18 joerg Exp $       */
+/*     $NetBSD: checknr.c,v 1.25 2021/04/13 01:38:04 mrg Exp $ */
 
 /*
  * Copyright (c) 1980, 1993
@@ -39,7 +39,7 @@
 #if 0
 static char sccsid[] = "@(#)checknr.c  8.1 (Berkeley) 6/6/93";
 #else 
-__RCSID("$NetBSD: checknr.c,v 1.24 2013/08/12 14:03:18 joerg Exp $");
+__RCSID("$NetBSD: checknr.c,v 1.25 2021/04/13 01:38:04 mrg Exp $");
 #endif
 #endif /* not lint */
 
@@ -325,6 +325,7 @@ process(FILE *f)
                         * find and isolate the macro/command name.
                         */
                        strncpy(mac, line+1, 4);
+                       mac[4] = '\0';
                        if (isspace((unsigned char)mac[0])) {
                                pe(lineno);
                                printf("Empty command\n");