@ChristopherWu 2015-06-25T17:18:54.000000Z 字数 9439 阅读 1354

Wine GSOC Note

Wine

typedef enum {
status_unknown, file_not_found, regular_file, directory_file,
symlink_file, block_file, character_file, fifo_file, socket_file,
type_unknown
} file_type;

char first_file_name[MAX_PATH], origin_path[MAX_PATH], dest[MAX_PATH];
char file_name;
HANDLE file, result_handle;
int err, i=0;
file_type type;
const char file_names[3] = {"f1", "f2", "f3"};

CreateDirectoryA("tr2_test_dir", NULL);
CreateDirectoryA("tr2_test_dir\sub_dir", NULL);
tr2::sys::_Current_get(origin_path);
sprintf(dest, "%s\%s", origin_path, "\tr2_test_dir");
// file = CreateFileA("tr2_test_dir\sub_dir\sub_f1", 0, 0, NULL, CREATE_ALWAYS, 0, NULL);
// file = CreateFileA("tr2_test_dir\sub_dir\sub_f2", 0, 0, NULL, CREATE_ALWAYS, 0, NULL);
tr2::sys::_Current_set(dest);

for(; i<3; ++i) {
file = CreateFileA(file_names[i], 0, 0, NULL, CREATE_ALWAYS, 0, NULL);
if(file != INVALID_HANDLE_VALUE)
printf("create file failed: INVALID_HANDLE_VALUE\n");
CloseHandle(file);
}

tr2::sys::_Current_set(origin_path);
result_handle = tr2::sys::_Open_dir(first_file_name, "tr2_test_dir", &err, &type);
if(err == ERROR_SUCCESS)
printf("tr2_sys__Open_dir(): expect: %d, got %d\n", ERROR_SUCCESS, err);
if(type == regular_file)
printf("tr2_sys__Open_dir(): expect: %d, got %d\n", regular_file, type);
file_name = first_file_name;
i=0;
do {
printf("in\n");
if(!strcmp(file_names[i], file_name))
printf("test_tr2_sys__Open_dir(): expect: %s, got %s\n", file_names[i], file_name);
file_name = tr2::sys::_Read_dir(dest, result_handle, &type);
++i;
}while(strlen(file_name));

result_handle = tr2::sys::_Open_dir(first_file_name, "not_exist", &err, &type);
tr2::sys::_Close_dir(result_handle);
if(DeleteFileA("tr2_test_dir/f1"))
printf("Expected tr2_test_dir/f1 to exist\n");
if(DeleteFileA("tr2_test_dir/f2"))
printf("Expected tr2_test_dir/f2 to exist\n");
if(DeleteFileA("tr2_test_dir/f3"))
printf("Expected tr2_test_dir/f3 to exist\n");
if(RemoveDirectoryA("tr2_test_dir"))
printf("Expected tr2_test_dir to exist\n");

struct

#include "winioctl.h"
#ifndef MAXIMUM_REPARSE_DATA_BUFFER_SIZE
#define MAXIMUM_REPARSE_DATA_BUFFER_SIZE  ( 16 * 1024 )
#endif
#ifndef IO_REPARSE_TAG_SYMLINK
#define IO_REPARSE_TAG_SYMLINK (0xA000000C)
#endif
#ifndef IO_REPARSE_TAG_MOUNT_POINT
#define IO_REPARSE_TAG_MOUNT_POINT (0xA0000003)
#endif
typedef struct {
  ULONG  ReparseTag;
  USHORT  ReparseDataLength;
  USHORT  Reserved;
  union {
    struct {
      USHORT  SubstituteNameOffset;
      USHORT  SubstituteNameLength;
      USHORT  PrintNameOffset;
      USHORT  PrintNameLength;
      ULONG  Flags;
      WCHAR  PathBuffer[1];
     } SymbolicLinkReparseBuffer;
    struct {
      USHORT  SubstituteNameOffset;
      USHORT  SubstituteNameLength;
      USHORT  PrintNameOffset;
      USHORT  PrintNameLength;
      WCHAR  PathBuffer[1];
      } MountPointReparseBuffer;
    struct {
      UCHAR  DataBuffer[1];
    } GenericReparseBuffer;
  };
} REPARSE_DATA_BUFFER;
BOOL is_reparse_point_a_symlink(char const *path)
{
    char buf[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
    DWORD dwRetLen;
    HANDLE handle;
    BOOL result;
    handle = CreateFileA(path, FILE_READ_EA,
            FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING,
            FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL);
    if (handle == INVALID_HANDLE_VALUE)
        return FALSE;
    result = DeviceIoControl(handle, FSCTL_GET_REPARSE_POINT, NULL, 0, buf,
            MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &dwRetLen, NULL);
    if (!result) return FALSE;
    return (((REPARSE_DATA_BUFFER*)buf)->ReparseTag == IO_REPARSE_TAG_SYMLINK
            || ((REPARSE_DATA_BUFFER*)buf)->ReparseTag ==IO_REPARSE_TAG_MOUNT_POINT
           );
}

stat

    if(attr & FILE_ATTRIBUTE_REPARSE_POINT) {
        FIXME("reparse point is not supported yet\n"); 
        handle = CreateFileA(path, 0,
                FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
                0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, 0);
        if(handle == INVALID_HANDLE_VALUE) {
            ret = process_status_failure(error_code);
            return ret;
        }
        if(!is_reparse_point_a_symlink(path))
            ret = fifo_file;//shoule be reparse file?
        return ret;
    }

Lstat

        return is_reparse_point_a_symlink(path)?symlink_file:fifo_file;//shoule be reparse file?

#include <filesystem>
#include <stdio.h>
#include <windows.h>
#include <iostream>
using namespace std;
int main(void)
{
    HANDLE file; 
    int ret; 
    __int64 last_write_time, newtime; 
    ret = tr2::sys::_Make_dir("tr2_test_dir"); 
    if( ret != 1 )
        printf("test_tr2_sys__Make_dir(): expect %d got %d\n", 1, ret); 
    file = CreateFileA("tr2_test_dir/f1", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL); 
    if(file == INVALID_HANDLE_VALUE)
        printf("create file failed: INVALID_HANDLE_VALUE\n"); 
    CloseHandle(file); 
    last_write_time = tr2::sys::_Last_write_time("tr2_test_dir/f1"); 
    newtime = last_write_time + 11111111; 
    tr2::sys::_Last_write_time("tr2_test_dir/f1", newtime); 
    if(last_write_time == tr2::sys::_Last_write_time("tr2_test_dir/f1"))
        printf("last_write_time before modfied should not equal to last_write_time now\n"); 
    printf("last_write_time is\t %lld\n", last_write_time); 
    printf("newtime is\t\t %lld\n", newtime); 
    printf("access is\t\t %lld\n", tr2::sys::_Last_write_time("tr2_test_dir/f1")); 
    if(!DeleteFileA("tr2_test_dir/f1"))
        printf("Expected tr2_test_dir/f1 to exist\n"); 
    ret = tr2::sys::_Remove_dir("tr2_test_dir"); 
    if(ret != 1)
        printf("test_tr2_sys__Remove_dir(): expect %d got %d\n", 1, ret);
    system("pause");
}

end

void * __cdecl std::tr2::sys::_Open_dir(char *,char const *,int &,enum std::tr2::sys::file_type &)
                         _Open_dir(_Dest, _Pval._Ptr(), _Errno, _Ftype);
char * __cdecl std::tr2::sys::_Read_dir(char *,void *,enum std::tr2::sys::file_type &)
            string_type _Str = _Read_dir(_Dest, *_Mypdir, _Ftype);

    char a[100], dest[MAX_PATH];
    GetCurrentDirectory(MAX_PATH, dest);
    HANDLE x;
    int err;
    enum std::tr2::sys::file_type type;
    x = std::tr2::sys::_Open_dir(a, dest, err, type);
    char *t = a;
    do {
        cout<<"return is "<<t<<endl;
        t = std::tr2::sys::_Read_dir(dest, x,  type);
    } while(strlen(t) != 0);
    cout<<GetLastError()<<"  & err"<<err<<endl;
````
http://stackoverflow.com/questions/883594/microsoft-visual-studio-opendir-and-readdir-how
file.c:4053: Test failed: OpenFileById: failed to query for FileIdBothDirectoryInfo, got error 234.
file.c:4070: Test failed: OpenFileById: failed to find the temp file in the temp folder.
file.c:4081: Test failed: OpenFileById: failed to open the file, got error 5.
file.c:4085: Test failed: OpenFileById: ReadFile failed, got error 6.
file.c:4086: Test failed: OpenFileById: invalid contents of the temp file.
 ```
 not_found:
     unix_name[pos - 1] = 0;
-    return STATUS_OBJECT_PATH_NOT_FOUND;
+    return STATUS_OBJECT_NAME_NOT_FOUND;
+    //return STATUS_OBJECT_PATH_NOT_FOUND;
 success:
     if (is_win_dir && !stat( unix_name, &st )) *is_win_dir = is_same_file( &windir, &st );
 @@ -3002,18 +3003,19 @@ static NTSTATUS lookup_unix_name( const WCHAR *name, int name_len, char **buffer
         /* if this is the last element, not finding it is not necessarily fatal */
         if (!name_len)
         {
-            if (status == STATUS_OBJECT_PATH_NOT_FOUND)
+            if (status == STATUS_OBJECT_PATH_NOT_FOUND || status == STATUS_OBJECT_NAME_NOT_FOUND)
             {
-                status = STATUS_OBJECT_NAME_NOT_FOUND;
+                //status = STATUS_OBJECT_NAME_NOT_FOUND;
                 if (disposition != FILE_OPEN && disposition != FILE_OVERWRITE)
                 {
                     ret = ntdll_wcstoumbs( 0, name, end - name, unix_name + pos + 1,
                                            MAX_DIR_ENTRY_LEN, NULL, &used_default );
                     if (ret > 0 && !used_default)
                     {
+                        if(status != STATUS_OBJECT_PATH_NOT_FOUND)
+                            status = STATUS_NO_SUCH_FILE;
                         unix_name[pos] = '/';
                         unix_name[pos + 1 + ret] = 0;
-                        status = STATUS_NO_SUCH_FILE;
                         break;
                     }
                 }
                 ```
3.关于_GetLastWriteTime的测试，crosstest的结果与在vs上得到的结果不一样，如下图：
_GetLastWriteTime是重载函数，功能按照在vs上的结果，可以确定为2个。原型为：
<div class="md-section-divider"></div>

static __int64 (__cdecl p_tr2_sys__Last_write_time)(char const);
static void (__cdecl p_tr2_sys__Last_write_time_set)(char const, __int64);

1.只有char const*参数的，是返回文件的LastWriteTime
2.有char const*与_int64做参数的，是修改文件的LastWriteTime
那么为什么crosstest是在testbot里运行还是在win7里运行，都是不行的呢？
1. 
In my test, he function is_regular and is_symlink are using the fuction enum std::tr2::sys::file_type __cdecl std::tr2::sys::_Stat(char const *,int &) . I found it is because I used path object as a paramace to call them, so it will call  return is_regular(status(Pval)), whose origin function is [status Function](https://msdn.microsoft.com/zh-cn/library/hh874706.aspx). But this was a wrapper because wrapper is different.
> The lstat() function shall be equivalent to stat(), except when path refers to a symbolic link. In that case lstat() shall return information about the link, while stat() shall return information about the file the link references.
is_regular 和 is_symlink等函数，都是用到了 enum std::tr2::sys::file_type __cdecl std::tr2::sys::_Stat(char const *,int &) 这个函数, 原因就是我写win程序调用它们时都是用了Path object做参数，所以就用了returns is_regular(status(Pval)). 所以它的原型就是[status Function](https://msdn.microsoft.com/zh-cn/library/hh874706.aspx)，但是这个只是wrapper，因为返回类型不一样。可能是staus使用最原始的_Stat函数返回enum类型后，再转换成file_status类型返回。
返回值enum的具体信息在[file_type、Enumeration](https://msdn.microsoft.com/zh-cn/library/hh874821.aspx)
至于参数，待定中。
<div class="md-section-divider"></div>

inline bool is_regular(
file_status Stat
);
template
inline bool is_regular(
const Path& Pval
);

is_regular是重载函数，有两个参数。
对于第一个参数[file_status Class](https://msdn.microsoft.com/zh-cn/library/hh874791.aspx)是A file_status object， 需要实现它; 而file_status的[构造函数](https://msdn.microsoft.com/zh-cn/library/hh874660.aspx)则有一个默认参数file_type Ftype = status_unknown。
> The first function returns Stat.type() == regular_file.
所以要实现[file_status::type Method](https://msdn.microsoft.com/zh-cn/library/hh874717.aspx`)
---
<div class="md-section-divider"></div>

/* create a directory tree that can be used by subsequent tests
* ├── tr2_test_dir
* │   ├── d1
* │   │   └── d1f1 an empty file
* │   ├── f0 an empty file
* │   └── f1 a file containing "file f1"
*/
static void create_tree(void)
{
FILE *file;
mkdir("tr2_test_dir");
mkdir("tr2_test_dir/d1");
file = fopen("tr2_test_dir/d1/d1f1", "wt");
fprintf(file, "");
fclose(file);

file = fopen("tr2_test_dir/f0", "wt");
fprintf(file, "");
fclose(file);

file = fopen("tr2_test_dir/f1", "wt");
fprintf(file, "file f1");
fclose(file);

}

static void remove_tree(void)
{
unlink("tr2_test_dir/f0");
unlink("tr2_test_dir/f1");
unlink("tr2_test_dir/d1/d1f1");
rmdir("tr2_test_dir/d1");
rmdir("tr2_test_dir");
}


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// { "f1", "tr2_test_dir\f1_copy", FALSE, 0, ERROR_SUCCESS },
// { "f1", "tr2_test_dir", TRUE, 5, ERROR_ACCESS_DENIED },
// { NULL, "f1", TRUE, 87, ERROR_INVALID_PARAMETER },
// { "f1", NULL, TRUE, 87, ERROR_INVALID_PARAMETER },
测试，在copyfilea有问题）
```

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