FsRtlRemoveDotsFromPath - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ntifs.h

NTSTATUS FsRtlRemoveDotsFromPath(
  [in, out] PWSTR  OriginalString,
  [in]      USHORT PathLength,
  [out]     USHORT *NewLength
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-ntifs-fsrtlremovedotsfrompath)

FsRtlRemoveDotsFromPath function

Description

The FsRtlRemoveDotsFromPath routine removes unnecessary occurrences of '.' and '..' from the specified path.

Parameters

OriginalString [in, out]

A pointer to the buffer to be processed.

PathLength [in]

The length of buffer (in bytes).

NewLength [out]

A pointer to the new length of the buffer, after processing.

Return value

The FsRtlRemoveDotsFromPath routine returns either STATUS_SUCCESS value for success or STATUS_IO_REPARSE_DATA_INVALID if the operation could not be completed.

Remarks

This routine would take a path as OriginalString like the following example:

\dir1\dir2\..\dir3\.\file.txt

The routine would modify OriginalString as follows:

\dir1\dir3\file.txt

The routine will fail with STATUS_IO_REPARSE_DATA_INVALID if any of the following strings are passed as OriginalString:

\..
..
..\anyOtherContent

View the official Windows Driver Kit DDI reference

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