From 781106ffe65e478ba68355d49510cc445d902901 Mon Sep 17 00:00:00 2001
From: jdc <jdc@NetBSD.org>
Date: Wed, 23 Feb 2000 11:33:58 +0000
Subject: [PATCH] Make sure that the control device can be opened.

---
 usr.sbin/tadpolectl/tadpolectl.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/usr.sbin/tadpolectl/tadpolectl.c b/usr.sbin/tadpolectl/tadpolectl.c
index be22c50c40c1..63afbb2cfff1 100644
--- a/usr.sbin/tadpolectl/tadpolectl.c
+++ b/usr.sbin/tadpolectl/tadpolectl.c
@@ -1,4 +1,4 @@
-/* $NetBSD: tadpolectl.c,v 1.2 1999/12/20 09:51:53 jdc Exp $ */
+/* $NetBSD: tadpolectl.c,v 1.3 2000/02/23 11:33:58 jdc Exp $ */
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -49,6 +49,8 @@
 #include <machine/apmvar.h>
 #include <machine/tctrl.h>
 
+#define TCTRL_DEV	"/dev/tctrl0"
+
 int aflag, nflag, wflag, dev;
 
 #define PROTO(x) int x __P((int, int, int));
@@ -747,7 +749,8 @@ main(argc, argv)
 	argc -= optind;
 	argv += optind;
 
-	dev = open("/dev/tctrl0", O_RDONLY, NULL);
+	if ((dev = open(TCTRL_DEV, O_RDONLY, NULL)) == -1)
+		err(1, "%s", TCTRL_DEV);
 
 	if (aflag) {
 		for (j=0; j < NUM_MIBS; j++) {