From 962d5a8b6957484cf2289d0cf53a8e068f63cb1b Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@swtch.com>
Date: Fri, 4 Jul 2008 12:39:01 -0400
Subject: devdraw: double-check write return value on OS X

---
 src/cmd/devdraw/osx-srv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/cmd/devdraw/osx-srv.c b/src/cmd/devdraw/osx-srv.c
index fc943d16..32450cd8 100644
--- a/src/cmd/devdraw/osx-srv.c
+++ b/src/cmd/devdraw/osx-srv.c
@@ -311,7 +311,8 @@ replymsg(Wsysmsg *m)
 		nmbuf = n;
 	}
 	convW2M(m, mbuf, n);
-	write(4, mbuf, n);
+	if(write(4, mbuf, n) != n)
+		sysfatal("write: %r");
 }
 
 /*
-- 
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