81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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//#include <linux/input.h> // this does not compile
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#include <errno.h>
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// from <linux/input.h>
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struct input_event {
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struct timeval time;
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__u16 type;
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__u16 code;
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__s32 value;
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};
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#define EVIOCGVERSION _IOR('E', 0x01, int) /* get driver version */
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#define EVIOCGID _IOR('E', 0x02, struct input_id) /* get device ID */
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#define EVIOCGKEYCODE _IOR('E', 0x04, int[2]) /* get keycode */
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#define EVIOCSKEYCODE _IOW('E', 0x04, int[2]) /* set keycode */
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#define EVIOCGNAME(len) _IOC(_IOC_READ, 'E', 0x06, len) /* get device name */
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#define EVIOCGPHYS(len) _IOC(_IOC_READ, 'E', 0x07, len) /* get physical location */
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#define EVIOCGUNIQ(len) _IOC(_IOC_READ, 'E', 0x08, len) /* get unique identifier */
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#define EVIOCGKEY(len) _IOC(_IOC_READ, 'E', 0x18, len) /* get global keystate */
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#define EVIOCGLED(len) _IOC(_IOC_READ, 'E', 0x19, len) /* get all LEDs */
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#define EVIOCGSND(len) _IOC(_IOC_READ, 'E', 0x1a, len) /* get all sounds status */
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#define EVIOCGSW(len) _IOC(_IOC_READ, 'E', 0x1b, len) /* get all switch states */
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#define EVIOCGBIT(ev,len) _IOC(_IOC_READ, 'E', 0x20 + ev, len) /* get event bits */
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#define EVIOCGABS(abs) _IOR('E', 0x40 + abs, struct input_absinfo) /* get abs value/limits */
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#define EVIOCSABS(abs) _IOW('E', 0xc0 + abs, struct input_absinfo) /* set abs value/limits */
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#define EVIOCSFF _IOC(_IOC_WRITE, 'E', 0x80, sizeof(struct ff_effect)) /* send a force effect to a force feedback device */
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#define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */
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#define EVIOCGEFFECTS _IOR('E', 0x84, int) /* Report number of effects playable at the same time */
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#define EVIOCGRAB _IOW('E', 0x90, int) /* Grab/Release device */
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// end <linux/input.h>
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int sendevent_main(int argc, char *argv[])
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{
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int i;
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int fd;
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int ret;
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int version;
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struct input_event event;
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if(argc != 5) {
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fprintf(stderr, "use: %s device type code value\n", argv[0]);
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return 1;
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}
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fd = open(argv[1], O_RDWR);
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if(fd < 0) {
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fprintf(stderr, "could not open %s, %s\n", argv[optind], strerror(errno));
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return 1;
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}
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if (ioctl(fd, EVIOCGVERSION, &version)) {
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fprintf(stderr, "could not get driver version for %s, %s\n", argv[optind], strerror(errno));
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return 1;
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}
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memset(&event, 0, sizeof(event));
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event.type = atoi(argv[2]);
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event.code = atoi(argv[3]);
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event.value = atoi(argv[4]);
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ret = write(fd, &event, sizeof(event));
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if(ret < sizeof(event)) {
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fprintf(stderr, "write event failed, %s\n", strerror(errno));
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return -1;
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}
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return 0;
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}
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