2.4.32 FileNamesInformation

This information class is used in directory enumeration to return detailed information about the contents of a directory.

This information class returns a list that contains a FILE_NAMES_INFORMATION data element for each file or directory within the target directory.

When multiple FILE_NAMES_INFORMATION data elements are present in the buffer, each MUST be aligned on an 8-byte boundary. Any bytes inserted for alignment SHOULD be set to zero, and the receiver MUST ignore them. No padding is required following the last data element.

A FILE_NAMES_INFORMATION data element is as follows.

NextEntryOffset (4 bytes):  A 32-bit unsigned integer that contains the byte offset from the beginning of this entry, at which the next FILE_NAMES_INFORMATION entry is located, if multiple entries are present in a buffer. This member MUST be zero if no other entries follow this one. An implementation MUST use this value to determine the location of the next entry (if multiple entries are present in a buffer).

FileIndex (4 bytes):  A 32-bit unsigned integer that contains the byte offset of the file within the parent directory. For file systems in which the position of a file within the parent directory is not fixed and can be changed at any time to maintain sort order, this field SHOULD be set to 0 and MUST be ignored.<135>

FileNameLength (4 bytes): A 32-bit unsigned integer that specifies the length, in bytes, of the file name contained within the FileName member.

FileName (variable):  A sequence of Unicode characters containing the file name. When working with this field, use FileNameLength to determine the length of the file name rather than assuming the presence of a trailing null delimiter. Dot directory names are valid for this field. For more details, see section 2.1.5.1.

This operation returns a status code as specified in section 2.2. Upon success, the status code returned by the function that processes this file information class is STATUS_SUCCESS. The most common error codes are listed in the following table.