xref: /aosp_15_r20/external/ltp/testcases/kernel/input/input02.c (revision 49cdfc7efb34551c7342be41a7384b9c40d7cab7)

/*
 * Copyright (c) 2015 Cedric Hnyda <[email protected]>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

 /*
  *  Create a virtual device (mouse), send events to /dev/uinput
  *  and check that the events are not received in /dev/input/eventX
  *  because the device is grabbed by another process
  */

#include <linux/input.h>

#include "test.h"
#include "safe_macros.h"
#include "lapi/fcntl.h"
#include "input_helper.h"

#define NB_TEST 20

static void setup(void);
static void send_information(void);
static void cleanup(void);

static int fd;
static int fd2;

char *TCID = "input02";

int main(int ac, char **av)
{
	int lc;
	int pid;

	tst_parse_opts(ac, av, NULL, NULL);

	setup();

	for (lc = 0; TEST_LOOPING(lc); ++lc) {
		pid = tst_fork();

		fd2 = open_device();

		switch (pid) {
		case 0:
			send_information();
			exit(0);
		case -1:
			tst_brkm(TBROK | TERRNO, cleanup, "fork() failed");
		default:
			if (no_events_queued(fd2, 0))
				tst_resm(TPASS, "No data received in eventX");
			else
				tst_resm(TFAIL, "Data received in eventX");
			SAFE_CLOSE(NULL, fd2);
		break;
		}

		SAFE_WAITPID(NULL, pid, NULL, 0);
	}

	cleanup();
	tst_exit();
}

static void setup(void)
{
	tst_require_root();

	fd = open_uinput();
	setup_mouse_events(fd);
	create_device(fd);
}

static void send_information(void)
{
	int nb;

	SAFE_IOCTL(NULL, fd2, EVIOCGRAB, 1);
	tst_resm(TINFO, "The virtual device was grabbed");

	for (nb = 0; nb < NB_TEST; ++nb) {
		send_rel_move(fd, 10, 1);
		usleep(1000);
	}

	SAFE_CLOSE(NULL, fd2);
}

static void cleanup(void)
{
	destroy_device(fd);
}