memfs produces different errors for invalid paths than NTFS

[carlreinke]

Bug Report

When attempting to read/write a file with a path that has a file along the path, memfs produces different errors than NTFS.

How to Reproduce

1. Mount memfs: "C:\Program Files (x86)\WinFsp\SxS\sxs.20230328T002019Z\bin\memfs-x64.exe" -i -F NTFS -n 65536 -s 67108864 -m M:
2. Run commands below.

Behaviors

NTFS behavior:

D:\> echo foo > C:\temp\foo

D:\> echo foo > C:\temp\foo\bar
The system cannot find the path specified.

D:\> echo foo > C:\temp\foo\bar\baz
The system cannot find the path specified.

D:\> type C:\temp\foo\bar
The directory name is invalid.

D:\> type C:\temp\foo\bar\baz
The system cannot find the path specified.

memfs behavior:

D:\> echo foo > M:\foo

D:\> echo foo > M:\foo\bar
The directory name is invalid.

D:\> echo foo > M:\foo\bar\baz
The system cannot find the path specified.

D:\> type M:\foo\bar
The filename, directory name, or volume label syntax is incorrect.

D:\> type M:\foo\bar\baz
The directory name is invalid.

Environment

• OS version and build: Windows 10 Pro for Workstations 22H2; build 19045.2728; version 10.0.19045.2728
• WinFsp version and build: 2023; version 2.0.23075