Linux 模拟 鼠标 键盘 事件

/************************************************************************
 *                      Linux 模拟 鼠标 键盘 事件
 * 说明：
 *     以前看到有些软件能够控制鼠标移动，键盘操作等功能，总想知道这些到底
 * 是怎么做到的，好像是2年前也尝试去做这件事，但那时候对知识的匮乏直接导致
 * 无法进行，早上突然想到这件事，于是又搜索了一下，鉴于目前经常接触Linux
 * 驱动，对这些东西的理解也就很容易。
 *
 *                                     2016-2-27 深圳 南山平山村 曾剑锋
 ***********************************************************************/

一、参考文章：
    1. 交互系统的构建之（二）Linux下鼠标和键盘的模拟控制
        http://blog.csdn.net/zouxy09/article/details/7920253
    2. 在Linux中模拟击键和鼠标移动
        http://os.51cto.com/art/201409/450283.htm

二、cat /proc/bus/input/devices:
    ......
    I: Bus= Vendor= Product= Version=ab41
    N: Name="AT Translated Set 2 keyboard"
    P: Phys=isa0060/serio0/input0
    S: Sysfs=/devices/platform/i8042/serio0/input/input1
    U: Uniq=
    H: Handlers=sysrq kbd event1        ---> keyboard
    B: PROP=
    B: EV=
    B: KEY= 3803078f800d001 feffffdfffefffff fffffffffffffffe
    B: MSC=
    B: LED=
    ......
    I: Bus= Vendor=0e0f Product= Version=
    N: Name="VMware VMware Virtual USB Mouse"
    P: Phys=usb-::00.0-/input1
    S: Sysfs=/devices/pci0000:/::11.0/::00.0/usb2/-/-:1.1/input/input3
    U: Uniq=
    H: Handlers=mouse1 event3           ---> mouse
    B: PROP=
    B: EV=
    B: KEY=ffff0000
    B: REL=
    B: MSC=
    ......

三、权限修改：
    myzr@myzr:/dev/input$ ls -al
    total
    drwxr-xr-x   root root     Feb  : .
    drwxr-xr-x  root root    Feb  : ..
    drwxr-xr-x   root root     Feb  : by-id
    drwxr-xr-x   root root     Feb  : by-path
    crw-r-----   root root ,  Feb  : event0
    crw-r-----   root root ,  Feb  : event1
    crw-r-----   root root ,  Feb  : event2
    crw-r-----   root root ,  Feb  : event3
    crw-r-----   root root ,  Feb  : event4
    crw-r--r--   root root ,   Feb  : js0
    crw-r-----   root root ,  Feb  : mice
    crw-r-----   root root ,  Feb  : mouse0
    crw-r-----   root root ,  Feb  : mouse1
    crw-r-----   root root ,  Feb  : mouse2
    myzr@myzr:/dev/input$ sudo chmod  * 

四、example code:
    #include <stdio.h>
    #include <linux/input.h>
    #include <fcntl.h>
    #include <sys/time.h>
    #include <unistd.h>
    #include <string.h>

    //按键模拟，按键包含按下和松开两个环节
    void simulate_key(int fd, int kval)
    {
        struct input_event event;
        gettimeofday(&event.time, );

        //按下kval键
        event.type = EV_KEY;
        event.value = ;
        event.code = kval;
        write(fd, &event, sizeof(event));

        //同步，也就是把它报告给系统
        event.type = EV_SYN;
        event.value = ;
        event.code = SYN_REPORT;
        write(fd, &event, sizeof(event));

        memset(&event, , sizeof(event));
        gettimeofday(&event.time, );

        //松开kval键
        event.type = EV_KEY;
        event.value = ;
        event.code = kval;
        write(fd, &event, sizeof(event));

        //同步，也就是把它报告给系统
        event.type = EV_SYN;
        event.value = ;
        event.code = SYN_REPORT;
        write(fd, &event, sizeof(event));
    }

    //鼠标移动模拟
    void simulate_mouse(int fd, int rel_x, int rel_y)
    {
        struct input_event event;
        gettimeofday(&event.time, );

        //x轴坐标的相对位移
        event.type = EV_REL;
        event.value = rel_x;
        event.code = REL_X;
        write(fd, &event, sizeof(event));

        //y轴坐标的相对位移
        event.type = EV_REL;
        event.value = rel_y;
        event.code = REL_Y;
        write(fd, &event, sizeof(event));

        //同步
        event.type = EV_SYN;
        event.value = ;
        event.code = SYN_REPORT;
        write(fd, &event, sizeof(event));
    }

    int main(int argc, char **argv)
    {
        int fd_mouse = -;
        int fd_kbd = -;
        int i = ;

        // 请保证该设备节点有写的权限
        fd_kbd = open("/dev/input/event1", O_RDWR);
        if(fd_kbd <= ) {
            printf("Can not open keyboard input file\n");
            return -;
        }

        // 请保证该设备节点有写的权限
        fd_mouse = open("/dev/input/event3", O_RDWR);
        if(fd_mouse <= ) {
            printf("Can not open mouse input file\n");
            return -;
        }

        for (i = ; i < ; i++) {
            //simulate_key(fd_mouse, BTN_LEFT);   //模拟按下鼠标左键
            //simulate_key(fd_mouse, BTN_RIGHT);  //模拟按下鼠标左键
            if (i %  == )
                simulate_key(fd_kbd, KEY_A);    //模拟按下键盘A键
            //模拟鼠标相对上次x和y轴相应移动10个像素
            //simulate_mouse(fd_mouse, 20, 20);
            sleep();
        }

        close(fd_kbd);
        close(fd_mouse);
    }