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/* Copyright 2010 Stefan Tomanek <stefan.tomanek+th@wertarbyte.de>
* You have permission to copy, modify, and redistribute under the
* terms of the GPLv3 or any later version.
* For full license terms, see COPYING.
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/input.h>
#include <linux/uinput.h>
#include "uinput.h"
static int uinput_fd = -1;
int open_uinput(const char *path) {
close_uinput();
struct uinput_user_dev device;
uinput_fd = open(path, O_WRONLY);
if (!uinput_fd) {
return -1;
}
memset(&device, 0, sizeof device);
strcpy(device.name,"triggerhappy");
device.id.bustype = BUS_USB;
device.id.vendor = 1;
device.id.product = 1;
device.id.version = 1;
if (write(uinput_fd,&device,sizeof(device)) != sizeof(device)) {
close_uinput();
return -1;
}
if (ioctl(uinput_fd,UI_SET_EVBIT,EV_KEY) < 0) {
close_uinput();
return -1;
}
/* we can generate _any_ key event */
int i;
for (i=0; i<KEY_MAX && uinput_fd; i++) {
if (ioctl(uinput_fd, UI_SET_KEYBIT, i) < 0) {
close_uinput();
return -1;
}
}
if (ioctl(uinput_fd, UI_DEV_CREATE) < 0) {
close_uinput();
return -1;
}
return uinput_fd;
}
void close_uinput() {
if (uinput_fd >= 0) {
close(uinput_fd);
uinput_fd = -1;
}
}
int send_event(const int type, const int code, const int value) {
if (!uinput_fd) {
return -1;
}
struct input_event event;
memset(&event, 0, sizeof event);
event.type = type;
event.code = code;
event.value = value;
if (write(uinput_fd, &event, sizeof(event)) != sizeof(event)) {
fprintf(stderr, "Error on send_event\n");
return -1;
}
return 0;
}
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