From 1709135ea19db22695e1f94232a4b95cc2e27a66 Mon Sep 17 00:00:00 2001
From: Matthew Dillon <dillon@apollo.backplane.com>
Date: Thu, 12 Jan 2012 11:06:59 -0800
Subject: [PATCH] vknetd - Ignore SIGPIPE

* Ignore SIGPIPE, fixing an undesired kill of vknetd when a write()
  races a vkernel termination.

Reported-by: tuxillo
---
 usr.sbin/vknetd/vknetd.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/usr.sbin/vknetd/vknetd.c b/usr.sbin/vknetd/vknetd.c
index 22e7581a9c..586c1376e4 100644
--- a/usr.sbin/vknetd/vknetd.c
+++ b/usr.sbin/vknetd/vknetd.c
@@ -105,6 +105,13 @@ main(int ac, char **av)
 	if (ac)
 		SetAddrOpt = 1;
 
+	/*
+	 * Ignore SIGPIPE to prevent write() races against disconnecting
+	 * clients from killing vknetd.  Should be inherited by all I/O
+	 * threads.
+	 */
+	signal(SIGPIPE, SIG_IGN);
+
 	/*
 	 * Special connect/debug mode
 	 */
-- 
2.41.0