1#include <errno.h>
2#include <fcntl.h>
3#include <linux/input.h>
4#include <stdint.h>
5#include <stdio.h>
6#include <stdlib.h>
7#include <string.h>
8#include <sys/ioctl.h>
9#include <unistd.h>
10
11int sendevent_main(int argc, char *argv[])
12{
13    int fd;
14    ssize_t ret;
15    int version;
16    struct input_event event;
17
18    if(argc != 5) {
19        fprintf(stderr, "use: %s device type code value\n", argv[0]);
20        return 1;
21    }
22
23    fd = open(argv[1], O_RDWR);
24    if(fd < 0) {
25        fprintf(stderr, "could not open %s, %s\n", argv[optind], strerror(errno));
26        return 1;
27    }
28    if (ioctl(fd, EVIOCGVERSION, &version)) {
29        fprintf(stderr, "could not get driver version for %s, %s\n", argv[optind], strerror(errno));
30        return 1;
31    }
32    memset(&event, 0, sizeof(event));
33    event.type = atoi(argv[2]);
34    event.code = atoi(argv[3]);
35    event.value = atoi(argv[4]);
36    ret = write(fd, &event, sizeof(event));
37    if(ret < (ssize_t) sizeof(event)) {
38        fprintf(stderr, "write event failed, %s\n", strerror(errno));
39        return -1;
40    }
41    return 0;
42}
43