Linux用户层模拟键盘

本文代码可以自动抓取到键盘属于哪个event，不需要人工进行代码修改

#include <string.h>  
#include <stdio.h>  
#include <sys/types.h>  
#include <sys/stat.h>  
#include <fcntl.h>  
#include <linux/input.h>  
#include <linux/uinput.h>   
#include <sys/time.h>    
#include <unistd.h>
#include <stdlib.h>

void simulate_key(int fd,int kval)  
{
    
      
    struct input_event event;  
    event.type = EV_KEY;  
    event.value = 1;  
    event.code = kval;  

    gettimeofday(&event.time,0);  
    write(fd,&event,sizeof(event)) ;  

        event.type = EV_SYN;  
        event.code = SYN_REPORT;  
        event.value = 0;  
        write(fd, &event, sizeof(event));  

        memset(&event, 0, sizeof(event));  
        gettimeofday(&event.time, NULL);  
        event.type = EV_KEY;  
        event.code = kval;  
        event.value = 0;  
        write(fd, &event, sizeof(event));  
        event.type = EV_SYN;  
        event.code = SYN_REPORT;  
        event.value = 0;  
        write(fd, &event, sizeof(event));  
}
/*
void simulate_mouse(int fd)  
{  
    struct input_event event;  
        memset(&event, 0, sizeof(event));  
        gettimeofday(&event.time, NULL);  
        event.type = EV_REL;  
        event.code = REL_X;  
        event.value = 10;  
        write(fd, &event, sizeof(event));  

        event.type = EV_REL;  
        event.code = REL_Y;  
        event.value = 10;  
        write(fd, &event, sizeof(event));  

        event.type = EV_SYN;  
        event.code = SYN_REPORT;  
        event.value = 0;  
        write(fd, &event, sizeof(event));  
}
*/
int main()  
{
    
      
    int fd_kbd;
    char a1[] = {
    
    '/','d','e','v','/','i','n','p','u','t','/'};
    FILE *fp;
    char buf[1024]={
    
    0};
    char buf1[1024]={
    
    0};
    
    //get keyboad devices
    fp = popen("cat /proc/bus/input/devices | grep -i -A 5 'keyboard' | grep -o event..","r");
    if(NULL != fp)
    {
    
    
	    while (fgets(buf,sizeof(buf),fp) != NULL)
	    {
    
    
		    printf("%s\n",buf);	    
		    sprintf(buf1, "%.11s%.6s", a1, buf);
		    printf("%s\n",buf1);
		    fd_kbd = open(buf1,O_RDWR);
	    }
    }
    else
    {
    
    
	    return 1;
    }
    pclose(fp);

    if(fd_kbd<=0){
    
      
        printf("error open keyboard:\n");  
        return -1;  
    }

    int i = 0;  
    for(i=0; i< 10; i++)  
    {
    
      
        simulate_key(fd_kbd, KEY_A + i);  
        sleep(1);  
    }  
    close(fd_kbd);  
}