Add the new keyboard-mouse random test case

See also: #1576

providers/base/src/Makefile

@@ -1,5 +1,5 @@
 .PHONY:
-all: alsa_test clocktest threaded_memtest ptrace_test testptp
+all: alsa_test clocktest threaded_memtest ptrace_test testptp keyboard-mouse_test
 
 ifeq ($(shell uname -m), x86_64)
 all: testptp
@@ -15,5 +15,6 @@ clocktest: CFLAGS += -D_POSIX_C_SOURCE=199309L -D_DEFAULT_SOURCE
 clocktest: LDLIBS += -lrt
 alsa_test: CXXFLAGS += -std=c++11
 alsa_test: LDLIBS += -lasound -pthread
+keyboard-mouse_test:
 
 CFLAGS += -Wall

providers/base/src/keyboard-mouse_test.c

@@ -0,0 +1,203 @@
+/**
+ * keyboard-mouse_test.c - A simple uinput program to randomly generate input events
+ * including key presses, mouse movements.
+ *
+ * SPDX-License-Identifier: GPL-2.0 (inherited from linux/uinput.h)
+ *
+ * vim: ts=8 sw=8 noet
+ **/
+
+#include <linux/uinput.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+/**
+ * Helper macros
+**/
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
+#define MAX(l, r) ((l) > (r) ? (l) : (r))
+
+#define KEYBOARD_KEYS \
+	KEY_A, KEY_B, KEY_C, KEY_D, KEY_E, KEY_F, KEY_G, KEY_H, KEY_I, KEY_J, \
+	KEY_K, KEY_L, KEY_M, KEY_N, KEY_O, KEY_P, KEY_Q, KEY_R, KEY_S, KEY_T, \
+	KEY_U, KEY_V, KEY_W, KEY_X, KEY_Y, KEY_Z, \
+	KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9, KEY_0
+#define MOUSE_BUTTONS BTN_LEFT, BTN_RIGHT
+
+#define IOCTL_SET_BITS(fd, ev, bits...) do { \
+	const unsigned int __bits[] = { bits }; \
+	if (ioctl(fd, UI_SET_EVBIT, EV_##ev) < 0) { \
+		perror("error: ioctl(UI_SET_EVBIT, EV_" #ev ")"); \
+		return 1; \
+	} \
+	for (int i = 0; i < ARRAY_SIZE(__bits); i++) { \
+		if (ioctl(fd, UI_SET_##ev##BIT, __bits[i]) < 0) { \
+			perror("error: ioctl(UI_SET_" #ev "BIT)"); \
+			return 1; \
+		} \
+	} \
+} while (0)
+
+int dev_init(int fd, const char *name) {
+	IOCTL_SET_BITS(fd, KEY, KEYBOARD_KEYS, MOUSE_BUTTONS);
+	IOCTL_SET_BITS(fd, REL, REL_X, REL_Y);
+
+	struct uinput_setup usetup;
+	memset(&usetup, 0, sizeof(usetup));
+	strcpy(usetup.name, name);
+	usetup.id.bustype = BUS_USB;
+	usetup.id.vendor = 0xbad;
+	usetup.id.product = 0xa55;
+	usetup.id.version = 777;
+
+	if (ioctl(fd, UI_DEV_SETUP, &usetup) < 0) {
+		perror("error: ioctl(UI_DEV_SETUP)");
+		return 1;
+	}
+	if (ioctl(fd, UI_DEV_CREATE) < 0) {
+		perror("error: ioctl(UI_DEV_CREATE)");
+		return 1;
+	}
+
+	sleep(1);		/* give userspace time to detect the new device */
+	return 0;
+}
+
+void dev_deinit(int fd) {
+	sleep(1);		/* give userspace time to read the events */
+	ioctl(fd, UI_DEV_DESTROY);
+}
+
+void key_press(int fd, unsigned int key) {
+	struct input_event ev, ev_sync;
+	memset(&ev_sync, 0, sizeof(ev_sync));
+	ev_sync.type = EV_SYN;
+	ev_sync.code = SYN_REPORT;
+
+	memset(&ev, 0, sizeof(ev));
+	ev.type = EV_KEY;
+	ev.code = key;
+
+	ev.value = 1;
+	write(fd, &ev, sizeof(ev));
+	write(fd, &ev_sync, sizeof(ev_sync));
+
+	ev.value = 0;
+	write(fd, &ev, sizeof(ev));
+	write(fd, &ev_sync, sizeof(ev_sync));
+}
+
+void mouse_move(int fd, int x, int y) {
+	struct input_event ev, ev_sync;
+	memset(&ev_sync, 0, sizeof(ev_sync));
+	ev_sync.type = EV_SYN;
+	ev_sync.code = SYN_REPORT;
+
+	memset(&ev, 0, sizeof(ev));
+	ev.type = EV_REL;
+	ev.code = REL_X;
+	ev.value = x;
+	write(fd, &ev, sizeof(ev));
+	ev.code = REL_Y;
+	ev.value = y;
+	write(fd, &ev, sizeof(ev));
+	write(fd, &ev_sync, sizeof(ev_sync));
+}
+
+/**
+ * Helper functions
+**/
+
+/* Randomly press a key among `KEYBOARD_KEYS` */
+void rand_key_press(int fd);
+/* Randomly move the mouse smoothly */
+void rand_mouse_moves(int fd);
+
+/**
+ * The following constants can be overridden at compile time:
+ * - FREQUENCY_USEC:	frequency of input events in microseconds
+ * - N_EPISODES:	number of input events to generate
+ * - WEIGHT_MOUSEMOVE:	weight of mouse movements
+ * - WEIGHT_KEYPRESS:	weight of key presses
+**/
+
+#ifndef FREQUENCY_USEC
+#define FREQUENCY_USEC 100000
+#endif
+
+#ifndef N_EPISODES
+#define N_EPISODES 81
+#endif
+
+#ifndef WEIGHT_MOUSEMOVE
+#define WEIGHT_MOUSEMOVE 10
+#endif
+
+#ifndef WEIGHT_KEYPRESS
+#define WEIGHT_KEYPRESS 1
+#endif
+
+#define WEIGHT_SUM (WEIGHT_MOUSEMOVE + WEIGHT_KEYPRESS)
+int main(void) {
+	int fd, rc = 0;
+
+	fd = open("/dev/uinput", O_WRONLY | O_NONBLOCK);
+	if (fd < 0) {
+		perror("error: open /dev/uinput");
+		return 1;
+	}
+
+	if ((rc = dev_init(fd, "key-mouse-random")))
+		goto close_fd;
+
+	srand(time(NULL));
+	for (int i = 0; i < N_EPISODES; i++) {
+		switch (rand() % WEIGHT_SUM) {
+			case 0 ... WEIGHT_MOUSEMOVE - 1:
+				rand_mouse_moves(fd);
+				break;
+			default:
+				rand_key_press(fd);
+				break;
+		}
+	}
+
+	dev_deinit(fd);
+close_fd:
+	close(fd);
+	return rc;
+}
+
+#define __MOVE_MAX 100
+#define MOVE_DELTA 5
+#define MOVE_MAX (__MOVE_MAX & 1 ? __MOVE_MAX : __MOVE_MAX + 1)
+#define MOVE_RAND (rand() % MOVE_MAX - MOVE_MAX / 2)
+
+void rand_key_press(int fd) {
+	const unsigned int keys[] = { KEYBOARD_KEYS };
+	key_press(fd, keys[rand() % ARRAY_SIZE(keys)]);
+	usleep(FREQUENCY_USEC);
+}
+
+void rand_mouse_moves(int fd) {
+	int x, y, steps;
+	x = MOVE_RAND;
+	y = MOVE_RAND;
+	steps = MAX(abs(x), abs(y)) / MOVE_DELTA;
+
+	for (int i = 0; i < steps; i++) {
+		mouse_move(fd, x / steps, y / steps);
+		usleep(FREQUENCY_USEC / MOVE_DELTA);
+	}
+
+	steps = steps ? steps : 0x7fffffff;
+	int rest_x = x % steps, rest_y = y % steps;
+	if (rest_x || rest_y) {
+		mouse_move(fd, rest_x, rest_y);
+		usleep(FREQUENCY_USEC / MOVE_DELTA);
+	}
+}