Use g_unix_set_fd_nonblocking()

API available since glib 2.30. It also preserves errno.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

hw/misc/ivshmem.c

@@ -537,7 +537,7 @@ static void process_msg_connect(IVShmemState *s, uint16_t posn, int fd,
 
     IVSHMEM_DPRINTF("eventfds[%d][%d] = %d\n", posn, vector, fd);
     event_notifier_init_fd(&peer->eventfds[vector], fd);
-    fcntl_setfl(fd, O_NONBLOCK); /* msix/irqfd poll non block */
+    g_unix_set_fd_nonblocking(fd, true, NULL); /* msix/irqfd poll non block */
 
     if (posn == s->vm_id) {
         setup_interrupt(s, vector, errp);

util/event_notifier-posix.c

@@ -52,13 +52,11 @@ int event_notifier_init(EventNotifier *e, int active)
         if (qemu_pipe(fds) < 0) {
             return -errno;
         }
-        ret = fcntl_setfl(fds[0], O_NONBLOCK);
-        if (ret < 0) {
+        if (!g_unix_set_fd_nonblocking(fds[0], true, NULL)) {
             ret = -errno;
             goto fail;
         }
-        ret = fcntl_setfl(fds[1], O_NONBLOCK);
-        if (ret < 0) {
+        if (!g_unix_set_fd_nonblocking(fds[1], true, NULL)) {
             ret = -errno;
             goto fail;
         }

util/main-loop.c

@@ -114,7 +114,7 @@ static int qemu_signal_init(Error **errp)
         return -errno;
     }
 
-    fcntl_setfl(sigfd, O_NONBLOCK);
+    g_unix_set_fd_nonblocking(sigfd, true, NULL);
 
     qemu_set_fd_handler(sigfd, sigfd_handler, NULL, (void *)(intptr_t)sigfd);