uinput test

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <linux/input.h>
#include <linux/uinput.h>
#include <time.h>


#define RELEASE    0
#define PRESS      1
#define AUTOREPEAT 2

#define total_time(x) (x.tv_sec * 100000 + x.tv_usec)

int main(int argc, char *argv[])
{
    struct uinput_user_dev  ui_dev;
    struct input_event      ev;
    int                     fd;

    fd = open("/dev/uinput", O_WRONLY | O_NONBLOCK);
    if(fd <= 0)
    {
        printf("Unable to open /dev/uinput\n");
        return -1;
    }

    usleep(100);

    memset(&ev, 0, sizeof(ev));
    memset(&ui_dev, 0, sizeof(ui_dev));

    strncpy(ui_dev.name, "uinput-test", UINPUT_MAX_NAME_SIZE);
    ui_dev.id.bustype = BUS_USB;
    ui_dev.id.vendor  = 0x1234;
    ui_dev.id.product = 0xABCD;
    ui_dev.id.version = 1;

    ioctl(fd, UI_SET_EVBIT,  EV_KEY);
    ioctl(fd, UI_SET_EVBIT,  EV_REP);
    ioctl(fd, UI_SET_KEYBIT, KEY_D);

    write(fd, &ui_dev, sizeof(ui_dev));
    ioctl(fd, UI_DEV_CREATE);

    usleep(100);

    while(1)
    {
        gettimeofday(&ev.time, NULL);
        ev.type = EV_KEY;
        ev.code = KEY_D;
        ev.value = PRESS;
        write(fd, &ev, sizeof(ev));

        gettimeofday(&ev.time, NULL);
        ev.type = EV_KEY;
        ev.code = KEY_D;
        ev.value = RELEASE;
        write(fd, &ev, sizeof(ev));

        gettimeofday(&ev.time, NULL);
        ev.type = EV_SYN;
        ev.code = SYN_REPORT;
        ev.value = 0;
        write(fd, &ev, sizeof(ev));

        usleep(500 * 1000);
    }

    ioctl(fd, UI_DEV_DESTROY);
    close(fd);
    printf("\nExit.\n\n");
    return 0;
}