linux模拟键盘

 #include
 #include
 #include
 #include
 #include
 #include
 #include

 /*
 struct input_event {
     struct timeval time;
     __u16 type;
     __u16 code;
     __s32 value;
 };

 #define EV_KEY                  0x01
 */
 int reportkey(int fd, uint16_t type, uint16_t keycode, int32_t value)
 {
     struct input_event event;

     event.type = type;
     event.code = keycode;
     event.value = value;

     gettimeofday(&event.time, 0);

     if (write(fd, &event, sizeof(struct input_event)) < 0) {
         printf("report key error!\n");
         return -1;
     }

     return 0;
 }

 #define DEVNAME "/dev/input/event4"

 #define KEYDOWN 1
 #define KEYUP   0

 int main(int argc, char *argv[])
 {
     uint16_t keycode;

     int k_fd;

     k_fd = open(DEVNAME, O_RDWR);

     if (k_fd < 0) {
         printf("open error!\n");
         return k_fd;
     }

     keycode = KEY_A;
     reportkey(k_fd, EV_KEY, keycode, KEYDOWN);
     reportkey(k_fd, EV_KEY, keycode, KEYUP);

     close(k_fd);

     return 0;
 }