uinput

最新推荐文章于 2023-12-24 20:03:13 发布

转载最新推荐文章于 2023-12-24 20:03:13 发布 · 814 阅读

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <linux/input.h>
#include <linux/uinput.h>
void usage(void)
{
printf(" Usage : keyboard <kye number> [key number...]\n");
printf(" keyboard 29 56 32 /* CTRL + ALT +D */\n");
printf(" keyboard 125 32 /* WIN +D */\n");
printf("/* Types of key number are defined in /usr/include/linux/input.h */\n");
return;
}
/* Setup the uinput device */
int setup_uinput_device(int fd)
{
struct uinput_user_dev uidev; // uInput device structure
memset(&uidev, 0, sizeof(struct uinput_user_dev)); // Intialize the uInput device to NULL
snprintf(uidev.name, UINPUT_MAX_NAME_SIZE, "uinput-keyboard");
uidev.id.bustype = BUS_USB;
uidev.id.vendor = 0x1;
uidev.id.product = 0x1;
uidev.id.version = 1;
// Setup the driver I/O channels
ioctl(fd, UI_SET_EVBIT, EV_KEY);
ioctl(fd, UI_SET_KEYBIT, BTN_LEFT);
for (int i = 0; i < 256; i++) {
ioctl(fd, UI_SET_KEYBIT, i);
}
ioctl(fd, UI_SET_EVBIT, EV_REL);
ioctl(fd, UI_SET_RELBIT, REL_X);
ioctl(fd, UI_SET_RELBIT, REL_Y);
/* Create input device into input sub-system */
write(fd, &uidev, sizeof(struct uinput_user_dev));
if (ioctl(fd, UI_DEV_CREATE) < 0) {
printf("error: create uinput device\n");
return -1;
}
return 0;
}
void uinput_key(int fd, int keycode, int keyvalue)
{
struct input_event ev; // Input device structure
memset(&ev, 0, sizeof(struct input_event));
gettimeofday(&ev.time, NULL);
ev.type = EV_KEY;
ev.code = keycode;
ev.value = keyvalue;
if (write(fd, &ev, sizeof(struct input_event)) < 0) {
printf("uinput key error\n");
return;
} else {
printf("uinput key %d, %d\n", keycode, keyvalue);
}
return;
}
void uinput_key_end(int fd)
{
struct input_event ev; // Input device structure
memset(&ev, 0, sizeof(struct input_event));
ev.type = EV_SYN;
ev.code = 0;
ev.value = 0;
write(fd, &ev, sizeof(struct input_event));
return;
}
//check the key is control key
int check_valid_control_key(int key)
{
int ret = 0;
int control_key[] = {29, 42, 54, 56, 97, 100, 125, 126};
int len = sizeof(control_key) / sizeof(control_key[0]);
for (int i = 0; i < len; i++) {
if (control_key[i] == key) {
ret = 1;
break;
}
}
return ret;
}
int main(int argc, char *argv[])
{
int fd = -1;
int key;
int i;
if (argc <= 1) {
usage();
return -1;
}
fd = open("/dev/uinput", O_WRONLY | O_NONBLOCK); // Open the input device
if (fd < 0) {
printf("error: open /dev/uinput\n");
return -1;
}
setup_uinput_device(fd);
sleep(1);
for (i = 1; i < argc; i++) {
key = atoi(argv[i]);
uinput_key(fd, key, 1);
if (check_valid_control_key(key) == 0) {
uinput_key(fd,key, 0);
}
}
for (i = 1; i < argc; i++) {
key = atoi(argv[i]);
if (check_valid_control_key(key) == 1) {
uinput_key(fd,key, 0);
}
}
uinput_key_end(fd);
if (ioctl(fd, UI_DEV_DESTROY) < 0) {
printf("error: ioctl");
return -1;
}
close(fd);
fd = -1;
return 0;
}