[PATCH libevdev] Accept LIBEVDEDV_READ_FLAG_BLOCKING as valid flag

[Peter Hutterer]

https://bugs.freedesktop.org/show_bug.cgi?id=89798

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 libevdev/libevdev.c         |  6 +++++-
 test/test-libevdev-events.c | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/libevdev/libevdev.c b/libevdev/libevdev.c
index 0cdbe22..8d7a250 100644
--- a/libevdev/libevdev.c
+++ b/libevdev/libevdev.c
@@ -989,6 +989,10 @@ libevdev_next_event(struct libevdev *dev, unsigned int flags, struct input_event
 {
 	int rc = LIBEVDEV_READ_STATUS_SUCCESS;
 	enum event_filter_status filter_status;
+	const int valid_flags = LIBEVDEV_READ_FLAG_NORMAL |
+				LIBEVDEV_READ_FLAG_SYNC |
+				LIBEVDEV_READ_FLAG_FORCE_SYNC |
+				LIBEVDEV_READ_FLAG_BLOCKING;
 
 	if (!dev->initialized) {
 		log_bug(dev, "device not initialized. call libevdev_set_fd() first\n");
@@ -996,7 +1000,7 @@ libevdev_next_event(struct libevdev *dev, unsigned int flags, struct input_event
 	} else if (dev->fd < 0)
 		return -EBADF;
 
-	if (!(flags & (LIBEVDEV_READ_FLAG_NORMAL|LIBEVDEV_READ_FLAG_SYNC|LIBEVDEV_READ_FLAG_FORCE_SYNC))) {
+	if ((flags & valid_flags) == 0) {
 		log_bug(dev, "invalid flags %#x.\n", flags);
 		return -EINVAL;
 	}
diff --git a/test/test-libevdev-events.c b/test/test-libevdev-events.c
index c950959..44447a0 100644
--- a/test/test-libevdev-events.c
+++ b/test/test-libevdev-events.c
@@ -97,6 +97,38 @@ START_TEST(test_next_event_invalid_fd)
 }
 END_TEST
 
+START_TEST(test_next_event_blocking)
+{
+	struct uinput_device* uidev;
+	struct libevdev *dev;
+	int fd, flags;
+	int rc;
+	struct input_event ev;
+
+	test_create_device(&uidev, &dev,
+			   EV_REL, REL_X,
+			   EV_REL, REL_Y,
+			   EV_KEY, BTN_LEFT,
+			   -1);
+
+	fd = libevdev_get_fd(dev);
+	flags = fcntl(fd, F_GETFL) & ~O_NONBLOCK;
+	rc = fcntl(fd, F_SETFL, flags);
+	ck_assert_int_eq(rc, 0);
+
+	uinput_device_event(uidev, EV_KEY, BTN_LEFT, 1);
+	uinput_device_event(uidev, EV_SYN, SYN_REPORT, 0);
+	rc = libevdev_next_event(dev, LIBEVDEV_READ_FLAG_BLOCKING, &ev);
+	ck_assert_int_eq(rc, LIBEVDEV_READ_STATUS_SUCCESS);
+	ck_assert_int_eq(ev.type, EV_KEY);
+	ck_assert_int_eq(ev.code, BTN_LEFT);
+	ck_assert_int_eq(ev.value, 1);
+
+	libevdev_free(dev);
+	uinput_device_free(uidev);
+}
+END_TEST
+
 START_TEST(test_syn_dropped_event)
 {
 	struct uinput_device* uidev;
@@ -2116,6 +2148,7 @@ libevdev_events(void)
 	TCase *tc = tcase_create("event polling");
 	tcase_add_test(tc, test_next_event);
 	tcase_add_test(tc, test_next_event_invalid_fd);
+	tcase_add_test(tc, test_next_event_blocking);
 	tcase_add_test(tc, test_syn_dropped_event);
 	tcase_add_test(tc, test_double_syn_dropped_event);
 	tcase_add_test(tc, test_event_type_filtered);
-- 
2.3.3