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
sendevent_main(int argc,char * argv[])11 int 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