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=0011 Vendor=0001 Product=0001 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=0
B: EV=120013
B: KEY=402000000 3803078f800d001 feffffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=7
......
I: Bus=0003 Vendor=0e0f Product=0003 Version=0110
N: Name="VMware VMware Virtual USB Mouse"
P: Phys=usb-0000:02:00.0-1/input1
S: Sysfs=/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-1/2-1:1.1/input/input3
U: Uniq=
H: Handlers=mouse1 event3           ---> mouse
B: PROP=0
B: EV=17
B: KEY=ffff0000 0 0 0 0
B: REL=143
B: MSC=10
......

三、权限修改：
myzr@myzr:/dev/input$ ls -al
total 0
drwxr-xr-x  4 root root    280 Feb 27 08:49 .
drwxr-xr-x 15 root root   4260 Feb 27 08:49 ..
drwxr-xr-x  2 root root    120 Feb 27 08:49 by-id
drwxr-xr-x  2 root root    180 Feb 27 08:49 by-path
crw-r-----  1 root root 13, 64 Feb 27 08:49 event0
crw-r-----  1 root root 13, 65 Feb 27 08:49 event1
crw-r-----  1 root root 13, 66 Feb 27 08:49 event2
crw-r-----  1 root root 13, 67 Feb 27 08:49 event3
crw-r-----  1 root root 13, 68 Feb 27 08:49 event4
crw-r--r--  1 root root 13,  0 Feb 27 08:49 js0
crw-r-----  1 root root 13, 63 Feb 27 08:49 mice
crw-r-----  1 root root 13, 32 Feb 27 08:49 mouse0
crw-r-----  1 root root 13, 33 Feb 27 08:49 mouse1
crw-r-----  1 root root 13, 34 Feb 27 08:49 mouse2
myzr@myzr:/dev/input$ sudo chmod 666 *

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, 0);

//按下kval键
event.type = EV_KEY;
event.value = 1;
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 = 0;
event.code = SYN_REPORT;
write(fd, &event, sizeof(event));

memset(&event, 0, sizeof(event));
gettimeofday(&event.time, 0);

//松开kval键
event.type = EV_KEY;
event.value = 0;
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 = 0;
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, 0);

//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 = 0;
event.code = SYN_REPORT;
write(fd, &event, sizeof(event));
}

int main(int argc, char **argv)
{
int fd_mouse = -1;
int fd_kbd = -1;
int i = 0;

// 请保证该设备节点有写的权限
fd_kbd = open("/dev/input/event1", O_RDWR);
if(fd_kbd <= 0) {
printf("Can not open keyboard input file\n");
return -1;
}

// 请保证该设备节点有写的权限
fd_mouse = open("/dev/input/event3", O_RDWR);
if(fd_mouse <= 0) {
printf("Can not open mouse input file\n");
return -1;
}

for (i = 0; i < 50; 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 % 3 == 0)
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(1);
}

close(fd_kbd);
close(fd_mouse);
}