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 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
