在不使用X11的C中在GNU/Linux中捕获按键 [英] Capturing Keystrokes in GNU/Linux in C without X11

问题描述

如果我在一个应用程序中工作并且按键盘上的键，我如何在C中，在GNU/LINUX下，在用户区中，不使用X11的情况下捕获该键(或字符串)，包括源应用程序的名称:)

If I am working in an application and I press key from keyboard, how can I capture that key (or string), including the source application's name, in C, under GNU/LINUX, in userland, without X11 :)

谢谢.

推荐答案

如果没有X11，这个问题会更加困难.
对于击键部分，您可以使用与此代码相似的代码，但是您必须将正在读取的设备(键盘，通常是/dev/input/event0)作为参数传递

Well, without X11 this problem is way more difficult.
For the keystroke part you can use a code similar to this one, but you have to pass as an argument the device that you are reading (keyboard, usually /dev/input/event0 )

#include <linux/input.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>

int main(int argc, char **argv)
{
    int fd;
    if(argc < 2) {
        printf("usage: %s <device>\n", argv[0]);
        return 1;
    }
    fd = open(argv[1], O_RDONLY);
    struct input_event ev;

    while (1)
    {
    read(fd, &ev, sizeof(struct input_event));

    if(ev.type == 1)
        printf("key %i state %i\n", ev.code, ev.value);

    }
}

信用不归我所有，此代码摘自Ventriloctrl黑客以获取击键. http://public.callutheran.edu/~abarker/ventriloctrl-0.4.tar .gz

Credits do not go to me, this code is taken from the Ventriloctrl hack to get keystrokes. http://public.callutheran.edu/~abarker/ventriloctrl-0.4.tar.gz

希望我能帮上忙.

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