From 834627669e2238da9a9ce9618954ffcacfe96f23 Mon Sep 17 00:00:00 2001
From: Mark Spencer <markster@digium.com>
Date: Wed, 17 Nov 2004 18:16:08 +0000
Subject: [PATCH] Check that FD's are open before closing (bug #2858)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@4279 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 res/res_musiconhold.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/res/res_musiconhold.c b/res/res_musiconhold.c
index 2dc39a5c65..e3808da624 100755
--- a/res/res_musiconhold.c
+++ b/res/res_musiconhold.c
@@ -224,8 +224,11 @@ static int spawn_mp3(struct mohclass *class)
 		/* Stdout goes to pipe */
 		dup2(fds[1], STDOUT_FILENO);
 		/* Close unused file descriptors */
-		for (x=3;x<8192;x++)
-			close(x);
+		for (x=3;x<8192;x++) {
+			if (-1 != fcntl(x, F_GETFL)) {
+				close(x);
+			}
+		}
 		/* Child */
 		chdir(class->dir);
 		if(class->custom) {