硬链接

 

#include <windows.h>

#include <string.h>

#include <stdio.h>



typedef BOOL (__stdcall *pCreateHardLink)(

                                          LPCTSTR lpFileName,

                                          LPCTSTR lpExistingFileName,

                                          LPSECURITY_ATTRIBUTES lpSecurityAttributes

                                          );



int main()

{

    HMODULE hlib = LoadLibrary("kernel32.dll");

    pCreateHardLink fCreateHardLink = (pCreateHardLink) GetProcAddress(hlib,"CreateHardLinkA"); 

    

    

    LPCTSTR str1 = "C:\\1.txt";

    LPCTSTR str2 = "c:\\2.txt";

    

    

    //保证2.txt在C盘根目录是存在的

    //且硬盘的分区格式为NTFS

    BOOL b = fCreateHardLink(str1,str2,NULL);

    

    if(b)    {

        HANDLE hFile = CreateFile("c:\\1.txt",GENERIC_WRITE,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);

        

        DWORD dwNum = 0;

        

        char *pszStr = "asdf";

        

        //对1.txt进行写入观察2.txt的内容

        WriteFile(hFile,(LPCTSTR)pszStr,strlen("asdf"),&dwNum,NULL);

        

        CloseHandle(hFile);

        

    }

    else

    {

        printf("%d",GetLastError());

    }

    return 0;

}