Verify virtual device availability

Virtual device is supposed to be found in /dev/uinput or
/dev/input/uinput, but in some cases this is not true. For instance, a
kernel which is not exposing any virtual device. This patch is meant to
verify that the device is available and we eventually skip test if it's
not found.

Reviewed-by: Petr Vorel <[email protected]>
Signed-off-by: Andrea Cervesato <[email protected]>

testcases/kernel/input/input01.c

@@ -53,6 +53,9 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	setup_mouse_events(fd_send);
 	create_input_device(fd_send);
 

testcases/kernel/input/input02.c

@@ -53,6 +53,9 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	setup_mouse_events(fd_send);
 	create_input_device(fd_send);
 

testcases/kernel/input/input03.c

@@ -82,6 +82,8 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
 
 	setup_mouse_events(fd_send);
 	SAFE_IOCTL(fd_send, UI_SET_EVBIT, EV_KEY);

testcases/kernel/input/input04.c

@@ -33,6 +33,9 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	setup_mouse_events(fd_send);
 	create_input_device(fd_send);
 

testcases/kernel/input/input05.c

@@ -38,6 +38,9 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	SAFE_IOCTL(fd_send, UI_SET_EVBIT, EV_KEY);
 	SAFE_IOCTL(fd_send, UI_SET_KEYBIT, BTN_LEFT);
 	create_input_device(fd_send);

testcases/kernel/input/input06.c

@@ -178,6 +178,8 @@ static void run(void)
 static void setup(void)
 {
 	fd_send = open_uinput();
+	if (fd_send == -1)
+		tst_brk(TCONF, "Virtual device is not available");
 
 	SAFE_IOCTL(fd_send, UI_SET_EVBIT, EV_KEY);
 	SAFE_IOCTL(fd_send, UI_SET_EVBIT, EV_REP);

testcases/kernel/uevents/uevent03.c

@@ -27,6 +27,9 @@ static int mouse_fd;
 static void create_uinput_mouse(void)
 {
 	mouse_fd = open_uinput();
+	if (mouse_fd == -1)
+		tst_brk(TCONF, "Virtual device is not available");
+
 	setup_mouse_events(mouse_fd);
 	create_input_device(mouse_fd);
 }