From: gabrielnagy@...
Date: 2021-05-15T09:43:14+00:00
Subject: [ruby-core:103857] [Ruby master Bug#12551] Exception accessing file with long path on windows

Issue #12551 has been updated by gabuscus (Gabriel Nagy).


I changed it to match the example from Microsoft:

``` xml
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3">
  <application xmlns="urn:schemas-microsoft-com:asm.v3">
    <windowsSettings xmlns:ws2="http://schemas.microsoft.com/SMI/2016/WindowsSettings">
      <ws2:longPathAware>true</ws2:longPathAware>
    </windowsSettings>
  </application>
</assembly>
```

The `assembly` tag is required as per https://docs.microsoft.com/en-us/windows/win32/sbscs/application-manifests


----------------------------------------
Bug #12551: Exception accessing file with long path on windows
https://bugs.ruby-lang.org/issues/12551#change-91980

* Author: Maturin (Lars Benner)
* Status: Open
* Priority: Normal
* ruby -v: ruby 2.3.0p0 (2015-12-25 revision 53290) [x64-mingw32]
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
----------------------------------------
Accessing file with a long file name causes this exception:

C:/Projects/Head/Build/cm/testdir01/testdir02/testdir03/testdir04/testdir05/testdir06/testdir07/testdir08/testdir09/testdir10/testdir11/testdir12/testdir13/testdir14/testdir15/testdir16/testdir17/testdir18/testdir19/testdir20/testdir21/testdir22/longtestfile.name.txt
repro_lstat_exception.rb:42:in `stat': No such file or directory @ rb_file_s_stat - C:/Projects/Head/Build/cm/testdir01/testdir02/testdir03/testdir04/testdir05/testdir06/testdir07/testdir08/testdir09/testdir10/testdir11/testdir12/testdir13/testdir14/testdir15/testdir16/testdir17/testdir18/testdir19/testdir20/testdir21/testdir22/longtestfile.name.txt (Errno::ENOENT)
        from repro_lstat_exception.rb:42:in `block in <main>'
        from repro_lstat_exception.rb:13:in `chdir'
        from repro_lstat_exception.rb:13:in `<main>'

Can be reproduced with the attach script.

I used windows 7 64 bit and an NTFS file system. 

For me it looks like, it has something to do with the legacy MAX_PATH_LENGTH of 260 characters. See https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath for more information. 

Originally I discovered the bug with JRuby (https://github.com/jruby/jruby/issues/3995).

With older Ruby version, I tried 1.8.5, it is working.



---Files--------------------------------
long_file_name_error.zip (10.7 KB)


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