[Qemu-trivial] [PATCH] qga: Fix shutdown command of guest agent to work with SysV

[whitearchey <whitearchey@gmail.com>]

For now guest agent uses following command to shutdown system:
shutdown -P +0 "blabla"
but this syntax works only with shutdown command from systemd or upstart,
because SysV shutdown requires -h switch.

Following patch changes the command so it works with systemd, upstart and SysV

Signed-off-by: Michael Avdienko <whitearchey@gmail.com>
---
  qga/commands-posix.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index f453132..10682f5 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -99,7 +99,7 @@ void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err)
          reopen_fd_to_null(1);
          reopen_fd_to_null(2);

-        execle("/sbin/shutdown", "shutdown", shutdown_flag, "+0",
+        execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
                 "hypervisor initiated shutdown", (char*)NULL, environ);
          _exit(EXIT_FAILURE);
      } else if (pid < 0) {
-- 
1.8.4.2