Issues with Cygwin64 on Windows11

[Takashi Yano]

On Mon, 1 Aug 2022 21:14:52 -0400
Ken Brown wrote:
> On 7/31/2022 8:23 PM, Takashi Yano wrote:
> > On Sun, 31 Jul 2022 17:21:32 +0900
> > Takashi Yano wrote:
> >> On Sun, 31 Jul 2022 09:11:17 +0300
> >> Dimax wrote:
> >>> Hello.
> >>> I've never had much luck with Cygwin64 and used the 32 bit version before.
> >>> Today I have no choice and I've installed Cyg64 on my new Win11 PC.
> >>>
> >>> Here is the first major issue I faced. I can not create symbolic links:
> >>>
> >>> Alex@Alexo ~
> >>> $ ls /cygdrive/C/XOL/
> >>>
> >>> Alex@Alexo ~
> >>> $ ln -s /cygdrive/C/XOL/ work
> >>>
> >>> Alex@Alexo ~
> >>> $ ls -all work
> >>> lrwxrwxrwx 1 Alex None 11 Jul 31 09:09 work -> /mnt/C/XOL/
> >>>
> >>> Alex@Alexo ~
> >>> $ cd ~/work/
> >>> -bash: cd: /home/Alex/work/: No such file or directory
> >>>
> >>> The link is created but I can not use it.
> >>> The only thing that I did not standard was to call installation folder
> >>> C:\Cygwin instead of default C:\Cygwin64
> >>>
> >>> Any help would be highly appreciated.
> >>
> >> Thanks for the report. This seems to happen only when
> >> the drive letter is uppercase.
> >>
> >> ln -s /cygdrive/c/XOL/ work
> >> works.
> >>
> >> Anyway, I think this is a problem of cygwin1.dll.
> >>
> >> This
> >> work -> /mnt/C/XOL/
> >> should be
> >> work -> /cygdrive/C/XOL/
> >> shouldn't it?
> >>
> >> It guess this is a bug in the code added for WSL
> >> compatibility.
> > 
> > I found the patch attached solves the issue.
> > 
> > Corinna, WDYT?
> 
> I'm not Corinna, but replacing oldpath by normpath doesn't seem like the right 
> thing to do at the time of symlink creation.  If I create a symlink under 
> Cygwin, I expect the target to be used under Cygwin exactly as I enter it.  The 

Hmm, that's the point.

> internal replacement of the cygdrive prefix by /mnt for WSL compatibility is 
> fine, as long as I never see it except under WSL.  But since WSL doesn't 
> recognize /mnt/<uppercase drive letter>, I don't think Cygwin should convert 
> /<cygdrive prefix>/<uppercase drive letter>.  Users who want WSL 
> interoperability just have to use lowercase drive letters.

Then, what about the v2 patch attached?

> I'm tempted to go even further and say that Cygwin shouldn't ever convert the 
> cygdrive prefix to /mnt, on the grounds that users who care about WSL 
> interoperability can simply use /mnt as their cygdrive prefix.  But maybe that 
> ship has sailed.

-- 
Takashi Yano <takashi.yano@nifty.ne.jp>
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