realpath issue with native[strict] symlinks

[Jeremy Drake]

Sorry ,forgot subject

On Tue, 18 May 2021, Jeremy Drake wrote:

> > Sorry, but there's only this or that, not both.  Either we revert the
> > entire change, including the native shortcut stuff, or we do it
> > completely and fully, including handling virtual drives as symlinks.
>
> I had success with just the following change (of course comments would
> also need to be updated):
>
> diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
> index 4ebaf4dc6..53534b8b6 100644
> --- a/winsup/cygwin/path.cc
> +++ b/winsup/cygwin/path.cc
> @@ -3670,8 +3670,7 @@ restart:
>  		   somewhere else, thus, it's a symlink in POSIX speak. */
>  		if (upath.Length == 14)	/* \??\X:\ */
>  		  {
> -		    fileattr &= ~FILE_ATTRIBUTE_DIRECTORY;
> -		    path_flags |= PATH_SYMLINK;
> +		    goto file_not_symlink;
>  		  }
>  		/* For final paths differing in inner path components return
>  		   length as negative value.  This informs path_conv::check
>
> Treating mapped/subst drives as though they were not symlinks, without
> messing with intermedate symlinks.
>

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