From 7f2d908da2f6727a325f1cfeffeb323ce861294e Mon Sep 17 00:00:00 2001
From: brian <brian@cvs.openbsd.org>
Date: Sat, 24 Jul 1999 03:18:33 +0000
Subject: Return EMSGSIZE for zero length writes - don't panic.

---
 sys/net/if_tun.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'sys/net')

diff --git a/sys/net/if_tun.c b/sys/net/if_tun.c
index 2b1cb7e95e6..6beafcb183a 100644
--- a/sys/net/if_tun.c
+++ b/sys/net/if_tun.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_tun.c,v 1.25 1999/04/22 20:02:44 art Exp $	*/
+/*	$OpenBSD: if_tun.c,v 1.26 1999/07/24 03:18:32 brian Exp $	*/
 /*	$NetBSD: if_tun.c,v 1.24 1996/05/07 02:40:48 thorpej Exp $	*/
 
 /*
@@ -554,7 +554,7 @@ tunwrite(dev, uio, ioflag)
 	ifp = &tunctl[unit].tun_if;
 	TUNDEBUG(("%s: tunwrite\n", ifp->if_xname));
 
-	if (uio->uio_resid < 0 || uio->uio_resid > TUNMRU) {
+	if (uio->uio_resid == 0 || uio->uio_resid > TUNMRU) {
 		TUNDEBUG(("%s: len=%d!\n", ifp->if_xname, uio->uio_resid));
 		return EMSGSIZE;
 	}
-- 
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