[Qemu-trivial] [PATCH] Use qemu_open / qemu_close in rng backend

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

In the rng backend use qemu_open and qemu_close rather than POSIX 
open/close.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>

diff --git a/backends/rng-random.c b/backends/rng-random.c
index 0d11088..acd20af 100644
--- a/backends/rng-random.c
+++ b/backends/rng-random.c
@@ -74,7 +74,7 @@ static void rng_random_opened(RngBackend *b, Error **errp)
          error_set(errp, QERR_INVALID_PARAMETER_VALUE,
                    "filename", "a valid filename");
      } else {
-        s->fd = open(s->filename, O_RDONLY | O_NONBLOCK);
+        s->fd = qemu_open(s->filename, O_RDONLY | O_NONBLOCK);

          if (s->fd == -1) {
              error_set(errp, QERR_OPEN_FILE_FAILED, s->filename);
@@ -130,7 +130,7 @@ static void rng_random_finalize(Object *obj)
      qemu_set_fd_handler(s->fd, NULL, NULL, NULL);

      if (s->fd != -1) {
-        close(s->fd);
+        qemu_close(s->fd);
      }

      g_free(s->filename);