From: Erik van der Kouwe <erik@minix3.org>
Date: Sun, 20 Jun 2010 07:30:53 +0000 (+0000)
Subject: Fix unlikely race (or crawl?) condition in case going from alarm to ioctl takes more... 
X-Git-Tag: v3.1.8~433
X-Git-Url: http://zhaoyanbai.com/repos/%22https:/www.google.com/jsapi/static/howto.html?a=commitdiff_plain;h=330374be9ede547c0ee32cda5a69fd78e1fb9c1b;p=minix.git

Fix unlikely race (or crawl?) condition in case going from alarm to ioctl takes more than 1 second
---

diff --git a/commands/dhcpd/devices.c b/commands/dhcpd/devices.c
index a0b758505..9a39177f2 100644
--- a/commands/dhcpd/devices.c
+++ b/commands/dhcpd/devices.c
@@ -96,6 +96,7 @@ void closefd(fd_t *fdp)
 static void timeout(int signum)
 {
     /* nothing to do, ioctl will be aborted automatically */
+    if (alarm(1) < 0) fatal("alarm(1)");
 }
 
 int opendev(network_t *np, fdtype_t fdtype, int compete)