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我编写了一个程序来查询变更日志记录并列出它们。变更日志返回：

1) filereferencenumber(fileindex.high 和 fileindex.low 的组合) 2) parentfilereferencenumber(与上面相同，只是用于目录) 3) szReason(出现在更改记录中的原因) 4) 文件名和文件长度。

我想找到更改日志中列出的此文件的路径。我见过的大多数实现都会跟踪所有文件引用编号并查询它以进行比较，或者他们使用 FindNextFile() 函数来遍历整个卷。

我遇到了一个讨论，他们说，他们可以只使用文件参考号打开文件句柄。http://www.tech-archive.net/Archive/Windows/microsoft.public.windows.file_system/2004-11/0244.html

msdn文章说，我们必须在调用内部API之前加载一个库http://msdn.microsoft.com/en-us/library/bb432380%28v=vs.85%29.aspx

有人能指出我正确的方向并告诉我该怎么做吗？如何使用 NtCreateFile()？

或者，有没有办法只使用文件参考号来访问文件路径？

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1 回答 1

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这是我使用的代码： http ://www.ragestorm.net/blogs/?cat=7

 #include windows.h
 typedef ULONG (__stdcall *pNtCreateFile)(
   PHANDLE FileHandle,
   ULONG DesiredAccess,
   PVOID ObjectAttributes,
   PVOID IoStatusBlock,
   PLARGE_INTEGER AllocationSize,
   ULONG FileAttributes,
   ULONG ShareAccess,
   ULONG CreateDisposition,
   ULONG CreateOptions,
   PVOID EaBuffer,
   ULONG EaLength
 );

 typedef ULONG (__stdcall *pNtReadFile)(
    IN HANDLE  FileHandle,
    IN HANDLE  Event  OPTIONAL,
    IN PVOID  ApcRoutine  OPTIONAL,
    IN PVOID  ApcContext  OPTIONAL,
    OUT PVOID  IoStatusBlock,
    OUT PVOID  Buffer,
    IN ULONG  Length,
    IN PLARGE_INTEGER  ByteOffset  OPTIONAL,
    IN PULONG  Key  OPTIONAL    );

 typedef struct _UNICODE_STRING {
    USHORT Length, MaximumLength;
    PWCH Buffer;
 } UNICODE_STRING, *PUNICODE_STRING;

 typedef struct _OBJECT_ATTRIBUTES {
 ULONG Length;
 HANDLE RootDirectory;
 PUNICODE_STRING ObjectName;
 ULONG Attributes;
 PVOID SecurityDescriptor;        // Points to type SECURITY_DESCRIPTOR
PVOID SecurityQualityOfService;  // Points to type SECURITY_QUALITY_OF_SERVICE
 } OBJECT_ATTRIBUTES;

 #define InitializeObjectAttributes( p, n, a, r, s ) { \
(p)->Length = sizeof( OBJECT_ATTRIBUTES );          \
(p)->RootDirectory = r;                             \
(p)->Attributes = a;                                \
(p)->ObjectName = n;                                \
(p)->SecurityDescriptor = s;                        \
(p)->SecurityQualityOfService = NULL;               \
}

 #define OBJ_CASE_INSENSITIVE  0x00000040L
 #define FILE_NON_DIRECTORY_FILE  0×00000040
 #define FILE_OPEN_BY_FILE_ID  0×00002000
 #define FILE_OPEN   0×00000001

 int main(int argc, char* argv[])
 {
    HANDLE d = CreateFile(L"\\\\.\\c:", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0  );
    BY_HANDLE_FILE_INFORMATION i;
    HANDLE f = CreateFile(L"c:\\bla.bla", GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    ULONG bla;
    WriteFile(f, "helloworld", 11, &bla, NULL);
    printf("%x, %d\n", f, GetLastError());
    GetFileInformationByHandle(f, &i);
    printf("id:%08x-%08x\n", i.nFileIndexHigh, i.nFileIndexLow);
    CloseHandle(f);

    pNtCreateFile NtCreatefile = (pNtCreateFile)GetProcAddress(GetModuleHandle(L"ntdll.dll"), "NtCreateFile");
    pNtReadFile NtReadFile = (pNtReadFile)GetProcAddress(GetModuleHandle(L"ntdll.dll"), "NtReadFile");

    ULONG fid[2] = {i.nFileIndexLow, i.nFileIndexHigh};
    UNICODE_STRING fidstr = {8, 8, (PWSTR) fid};

    OBJECT_ATTRIBUTES oa = {0};
     InitializeObjectAttributes (&oa, &fidstr, OBJ_CASE_INSENSITIVE, d, NULL);

     ULONG iosb[2];
     ULONG status = NtCreatefile(&f, GENERIC_ALL, &oa, iosb, NULL, FILE_ATTRIBUTE_NORMAL, FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_OPEN, FILE_OPEN_BY_FILE_ID | FILE_NON_DIRECTORY_FILE, NULL, 0);
    printf("status: %X, handle: %x\n", status, f);
    UCHAR buf[11] = {0};
    LONG Off[2] = {0};
    status = NtReadFile(f, NULL, NULL, NULL, (PVOID)&iosb, (PVOID)buf, sizeof(buf), (PLARGE_INTEGER)&Off, NULL);
    printf("status: %X, bytes: %d\n", status, iosb[1]);
    printf("buf: %s\n", buf);
    CloseHandle(f);
    CloseHandle(d);
 }

如您所见，一旦您提供了文件参考编号的 fileindex.high 和 fileindex.low 部分，它就会为您提供该文件的句柄。我使用了 psapi 的 getFileMapping 函数来获取完整路径。对于那些好奇的信息：http: //msdn.microsoft.com/en-us/library/aa366789.aspx

于 2011-09-20T18:02:39.430 回答