Undocumented functions of NTDLL

2OO1, 13 April


Gridstore - NonStop Storage

FILE_NAMES_INFORMATION
FILE_NAMES_INFORMATION

typedef struct _FILE_NAMES_INFORMATION {


  ULONG                   NextEntryOffset;
  ULONG                   FileIndex;
  ULONG                   FileNameLength;
  WCHAR                   FileName[1];


} FILE_NAMES_INFORMATION, *PFILE_NAMES_INFORMATION;



Structure FILE_NAMES_INFORMATION is used as a result of call NtQueryDirectoryFile with FileNamesInformation information class. It's shorter then other directory informational structures, so can be used for better performance, when only file names are required.


  • NextEntryOffset
    •     Offset (in bytes) of next FILE_NAMES_INFORMATION entry, or zero if last.
  • FileIndex
    •     Index of file, or zero if Directory Indexing is disabled.
  • FileNameLength
    •     Length of FileName array, in bytes.
  • FileName[1]
    •     Name of file, in UNICODE format.


    Documented by:
    Tomasz Nowak
    Bo Branten



    Requirements:
    Library: ntdll.lib


    See also:
    FILE_BOTH_DIR_INFORMATION
    FILE_DIRECTORY_INFORMATION
    FILE_FULL_DIR_INFORMATION
    FILE_INFORMATION_CLASS
    NtQueryDirectoryFile