From: Ben Gras <ben@minix3.org>
Date: Tue, 22 Jun 2010 23:23:31 +0000 (+0000)
Subject: Fix unlikely race (or crawl?) condition in case going from alarm to ioctl takes more... 
X-Git-Url: http://zhaoyanbai.com/repos/man.genrandom.html?a=commitdiff_plain;h=673b26906804eeb4e4a57db2867b6d9380d62756;p=minix.git

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

(r7382 from trunk)
---

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)