From e1d1a962c74e0f77de3881a5fbdb0f50809eda64 Mon Sep 17 00:00:00 2001
From: "Kevin P. Fleming" <kpfleming@digium.com>
Date: Fri, 22 Apr 2005 01:40:23 +0000
Subject: [PATCH] initialize errno and don't report an error when poll()
 returns without indicating one (bug #4059)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5492 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 channel.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/channel.c b/channel.c
index d08bc42f6f..519281176b 100755
--- a/channel.c
+++ b/channel.c
@@ -1251,9 +1251,10 @@ char ast_waitfordigit_full(struct ast_channel *c, int ms, int audiofd, int cmdfd
 		return -1;
 	/* Wait for a digit, no more than ms milliseconds total. */
 	while(ms) {
+		errno = 0;
 		rchan = ast_waitfor_nandfds(&c, 1, &cmdfd, (cmdfd > -1) ? 1 : 0, NULL, &outfd, &ms);
 		if ((!rchan) && (outfd < 0) && (ms)) { 
-			if (errno == EINTR)
+			if (errno == 0 || errno == EINTR)
 				continue;
 			ast_log(LOG_WARNING, "Wait failed (%s)\n", strerror(errno));
 			return -1;