1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #include <stdint.h> 5 #include <fcntl.h> 6 #include <sys/ioctl.h> 7 //#include <linux/input.h> // this does not compile 8 #include <errno.h> 9 10 11 // from <linux/input.h> 12 13 struct input_event { 14 struct timeval time; 15 __u16 type; 16 __u16 code; 17 __s32 value; 18 }; 19 20 #define EVIOCGVERSION _IOR('E', 0x01, int) /* get driver version */ 21 #define EVIOCGID _IOR('E', 0x02, struct input_id) /* get device ID */ 22 #define EVIOCGKEYCODE _IOR('E', 0x04, int[2]) /* get keycode */ 23 #define EVIOCSKEYCODE _IOW('E', 0x04, int[2]) /* set keycode */ 24 25 #define EVIOCGNAME(len) _IOC(_IOC_READ, 'E', 0x06, len) /* get device name */ 26 #define EVIOCGPHYS(len) _IOC(_IOC_READ, 'E', 0x07, len) /* get physical location */ 27 #define EVIOCGUNIQ(len) _IOC(_IOC_READ, 'E', 0x08, len) /* get unique identifier */ 28 29 #define EVIOCGKEY(len) _IOC(_IOC_READ, 'E', 0x18, len) /* get global keystate */ 30 #define EVIOCGLED(len) _IOC(_IOC_READ, 'E', 0x19, len) /* get all LEDs */ 31 #define EVIOCGSND(len) _IOC(_IOC_READ, 'E', 0x1a, len) /* get all sounds status */ 32 #define EVIOCGSW(len) _IOC(_IOC_READ, 'E', 0x1b, len) /* get all switch states */ 33 34 #define EVIOCGBIT(ev,len) _IOC(_IOC_READ, 'E', 0x20 + ev, len) /* get event bits */ 35 #define EVIOCGABS(abs) _IOR('E', 0x40 + abs, struct input_absinfo) /* get abs value/limits */ 36 #define EVIOCSABS(abs) _IOW('E', 0xc0 + abs, struct input_absinfo) /* set abs value/limits */ 37 38 #define EVIOCSFF _IOC(_IOC_WRITE, 'E', 0x80, sizeof(struct ff_effect)) /* send a force effect to a force feedback device */ 39 #define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */ 40 #define EVIOCGEFFECTS _IOR('E', 0x84, int) /* Report number of effects playable at the same time */ 41 42 #define EVIOCGRAB _IOW('E', 0x90, int) /* Grab/Release device */ 43 44 // end <linux/input.h> 45 46 47 48 int sendevent_main(int argc, char *argv[]) 49 { 50 int i; 51 int fd; 52 int ret; 53 int version; 54 struct input_event event; 55 56 if(argc != 5) { 57 fprintf(stderr, "use: %s device type code value\n", argv[0]); 58 return 1; 59 } 60 61 fd = open(argv[1], O_RDWR); 62 if(fd < 0) { 63 fprintf(stderr, "could not open %s, %s\n", argv[optind], strerror(errno)); 64 return 1; 65 } 66 if (ioctl(fd, EVIOCGVERSION, &version)) { 67 fprintf(stderr, "could not get driver version for %s, %s\n", argv[optind], strerror(errno)); 68 return 1; 69 } 70 memset(&event, 0, sizeof(event)); 71 event.type = atoi(argv[2]); 72 event.code = atoi(argv[3]); 73 event.value = atoi(argv[4]); 74 ret = write(fd, &event, sizeof(event)); 75 if(ret < sizeof(event)) { 76 fprintf(stderr, "write event failed, %s\n", strerror(errno)); 77 return -1; 78 } 79 return 0; 80 } 81
