FILE_BOTH_DIR_INFORMATION

2OO1, 13 April

typedef struct _FILE_BOTH_DIR_INFORMATION {

  ULONG                   NextEntryOffset;
  ULONG                   FileIndex;
  LARGE_INTEGER           CreationTime;
  LARGE_INTEGER           LastAccessTime;
  LARGE_INTEGER           LastWriteTime;
  LARGE_INTEGER           ChangeTime;
  LARGE_INTEGER           EndOfFile;
  LARGE_INTEGER           AllocationSize;
  ULONG                   FileAttributes;
  ULONG                   FileNameLength;
  ULONG                   EaSize;
  BYTE                    ShortNameLength;
  WCHAR                   ShortName[12];
  WCHAR                   FileName[1];

} FILE_BOTH_DIR_INFORMATION, *PFILE_BOTH_DIR_INFORMATION;

Structure FILE_BOTH_DIR_INFORMATION is returned as a result of call NtQueryDirectoryFile with FileBothDirectoryInformation information class. It's extended version of FILE_FULL_DIR_INFORMATION structure, additionally containing short file name. It's used in Win32 API calls FindFirstFile and FindNextFile.

NextEntryOffset

Offset (in bytes) of next FILE_BOTH_DIR_INFORMATION structure placed in result buffer. If there's no more entries, NextEntryOffset is set to zero.

FileIndex

File index value, or zero, if directory indexing is not avaiable.

CreationTime

Time of object creation;

LastAccessTime

Last access time. Means time when last open operation was performed.

LastWriteTime

Time of last write data.

ChangeTime

Time of last change.

EndOfFile

Specify length of file, in bytes.

AllocationSize

Specify real size of file on device. It must be equal or greater to EndOfFile member.

FileAttributes

Attributes of file.

FileNameLength

Length of FileName array, in bytes.

EaSize

Size of Extended Attributes associated with file. See also FILE_EA_INFORMATION structure.

ShortNameLength

Length ShortName array, in bytes.

ShortName[12]

Alternate file name, in UNICODE format. Empty string means:

Primary name is compatible with 8DOT3 (MS DOS) standart, and there's no reason to set the same name twice;
File system don't improve short names;

FileName[1]

UNICODE string specifing file name.

Documented by:

Tomasz Nowak

Bo Branten

Requirements:

Library: ntdll.lib

Undocumented functions of NTDLL