kvm-Do-not-ignore-error-if-open-file-failed-serial-dev-t.patch

From fc971c84325434725b2580a7e7397b007ce7a936 Mon Sep 17 00:00:00 2001
From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Mon, 1 Mar 2010 20:52:11 -0300
Subject: [PATCH 08/20] Do not ignore error, if open file failed (-serial /dev/tty)

RH-Author: Marcelo Tosatti <mtosatti@redhat.com>
Message-id: <39ce3091968908df84a120c94b84d77945b0f885.1267476474.git.mtosatti@redhat.com>
Patchwork-id: 7355
O-Subject: [PATCH 09/21] Do not ignore error,
	if open file failed (-serial /dev/tty)
Bugzilla: 569613
RH-Acked-by: Markus Armbruster <armbru@redhat.com>
RH-Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
RH-Acked-by: Gleb Natapov <gleb@redhat.com>
RH-Acked-by: Glauber Costa <glommer@redhat.com>

From: Evgeniy Dushistov <dushistov@mail.ru>

In case, when qemu is executed with option like
-serial /dev/ttyS0, report if there are problems with
opening of devices. At now errors are silently ignoring.

Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit afc535acb579a7808d9ff170088c839a29c61dc9)
(cherry picked from commit 02510b24368f76b5e8eb3edbca880d177869f265)
---
 qemu-char.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 qemu-char.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/qemu-char.c b/qemu-char.c
index b13f8d4..5a1b535 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -1180,6 +1180,9 @@ static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
     int fd;
 
     TFR(fd = open(filename, O_RDWR | O_NONBLOCK));
+    if (fd < 0) {
+        return NULL;
+    }
     tty_serial_init(fd, 115200, 'N', 8, 1);
     chr = qemu_chr_open_fd(fd, fd);
     if (!chr) {
-- 
1.7.0.3