From: Andre Noll <maan@systemlinux.org>
Date: Fri, 15 Jan 2010 19:21:13 +0000 (+0100)
Subject: sched: Reset the descriptor sets on timeouts.
X-Git-Tag: v0.4.2~88
X-Git-Url: http://git.tue.mpg.de/?a=commitdiff_plain;h=5f375bf464d99c5d6ce4126f5e815da1839105c5;p=paraslash.git

sched: Reset the descriptor sets on timeouts.

This is certainly not neccessary on linux, but it does not hurt
and is clearly more portable.
---

diff --git a/sched.c b/sched.c
index e58483e9..5c185715 100644
--- a/sched.c
+++ b/sched.c
@@ -120,6 +120,16 @@ again:
 	ret = s->select_function(s->max_fileno + 1, &s->rfds, &s->wfds, &s->timeout);
 	if (ret < 0)
 		return ret;
+	if (ret == 0) {
+		/*
+		 * APUE: Be careful not to check the descriptor sets on return
+		 * unless the return value is greater than zero. The return
+		 * state of the descriptor sets is implementation dependent if
+		 * either a signal is caught or the timer expires.
+		 */
+		FD_ZERO(&s->rfds);
+		FD_ZERO(&s->wfds);
+	}
 	gettimeofday(now, NULL);
 	sched_post_select(s);
 	if (list_empty(&pre_select_list) && list_empty(&post_select_list))