treewide: use qemu_set_blocking instead of g_unix_set_fd_nonblocking

Instead of open-coded g_unix_set_fd_nonblocking() calls, use
QEMU wrapper qemu_set_blocking().

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
[DB: fix missing closing ) in tap-bsd.c, remove now unused GError var]
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

util/event_notifier-posix.c

@@ -11,6 +11,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qapi/error.h"
 #include "qemu/cutils.h"
 #include "qemu/event_notifier.h"
 #include "qemu/main-loop.h"
@@ -36,6 +37,7 @@ int event_notifier_init(EventNotifier *e, int active)
 {
     int fds[2];
     int ret;
+    Error *local_err = NULL;
 
 #ifdef CONFIG_EVENTFD
     ret = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
@@ -52,11 +54,11 @@ int event_notifier_init(EventNotifier *e, int active)
         if (!g_unix_open_pipe(fds, FD_CLOEXEC, NULL)) {
             return -errno;
         }
-        if (!g_unix_set_fd_nonblocking(fds[0], true, NULL)) {
+        if (!qemu_set_blocking(fds[0], false, &local_err)) {
             ret = -errno;
             goto fail;
         }
-        if (!g_unix_set_fd_nonblocking(fds[1], true, NULL)) {
+        if (!qemu_set_blocking(fds[1], false, &local_err)) {
             ret = -errno;
             goto fail;
         }
@@ -70,6 +72,7 @@ int event_notifier_init(EventNotifier *e, int active)
     return 0;
 
 fail:
+    error_report_err(local_err);
     close(fds[0]);
     close(fds[1]);
     return ret;

util/main-loop.c

@@ -114,7 +114,10 @@ static int qemu_signal_init(Error **errp)
         return -errno;
     }
 
-    g_unix_set_fd_nonblocking(sigfd, true, NULL);
+    if (!qemu_set_blocking(sigfd, false, errp)) {
+        close(sigfd);
+        return -EINVAL;
+    }
 
     qemu_set_fd_handler(sigfd, sigfd_handler, NULL, (void *)(intptr_t)sigfd);