[Qemu-devel] [PATCH 1/4] qemu-ga: set O_NONBLOCK for serial channels

[Luiz Capitulino <lcapitulino@redhat.com>]

This fixes a bug when using -m isa-serial where qemu-ga will
hang on a read()'s when communicating to the host via isa-serial.

Original fix by Michael Roth.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
 qemu-ga.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/qemu-ga.c b/qemu-ga.c
index 29e4f64..647df82 100644
--- a/qemu-ga.c
+++ b/qemu-ga.c
@@ -504,7 +504,7 @@ static void init_guest_agent(GAState *s)
             exit(EXIT_FAILURE);
         }
     } else if (strcmp(s->method, "isa-serial") == 0) {
-        fd = qemu_open(s->path, O_RDWR | O_NOCTTY);
+        fd = qemu_open(s->path, O_RDWR | O_NOCTTY | O_NONBLOCK);
         if (fd == -1) {
             g_critical("error opening channel: %s", strerror(errno));
             exit(EXIT_FAILURE);
-- 
1.7.9.rc2