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Subject:	Document support for @ character in UNC paths
To:	cygwin AT cygwin DOT com
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From:	Takeshi Nishimura via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Takeshi Nishimura <takeshi DOT nishimura DOT linux AT gmail DOT com>
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Subject says it all, please document that @ characters in UNC paths
are now supported, for WebDAV and BeeGFS

---------- Forwarded message ---------
From: Takeshi Nishimura <takeshi DOT nishimura DOT linux AT gmail DOT com>
Date: Tue, Feb 25, 2025 at 4:58 PM
Subject: Re: UNC path for WebDAV with cd '\\webdavsrv AT SSL\path' or cd
'\\webdavsrv AT 23456\path' will not work
To: <cygwin AT cygwin DOT com>


On Sat, Feb 22, 2025 at 12:20 PM Corinna Vinschen via Cygwin
<cygwin AT cygwin DOT com> wrote:
>
> On Feb 21 22:04, Takeshi Nishimura via Cygwin wrote:
> > On Fri, Feb 21, 2025 at 11:28 AM Corinna Vinschen via Cygwin
> > <cygwin AT cygwin DOT com> wrote:
> > >
> > > On Feb 20 23:36, Martin Wege via Cygwin wrote:
> > > > On Thu, Feb 20, 2025 at 9:37 PM Corinna Vinschen via Cygwin
> > > > > And here's the problem.  It works fine for me on all shares, be it SMB,
> > > > > Samba, or NFS:
> > > > >
> > > > > https://cygwin.com/pipermail/cygwin/2025-February/257438.html
> > > > >
> > > > > > Maybe the hostname resolution in fhandler_netdrive::exists() failed?
> > > > >
> > > > > If so, it would be a problem on your side.
> > > > > Does `nslookup ember.data4.local' return a valid address?
> > > > >
> > > > > I just pushed a patch to print a debug statement in strace output
> > > > > to see what error code GetAddrInfoW returned.
> > > >
> > > > The code in https://cygwin.com/git/?p=newlib-cygwin.git;a=commitdiff;h=df307349a09e6f1ba75c78b1427dcea40f435e6e;hp=8a8fb570d7c5310a03a34b3dd6f9f8bb35ee9f40
> > > > is not going to work, because you only give ret as argument, but not
> > > > "name+2" as hostname.
> > >
> > > Yeah, it was obviously too late yesterday.  The patch was wrong twice.
> > >
> > > I pushed a patch for the patch which should show up in the just
> > > building cygwin-3.6.0-0.381.g8cc55d819bb7 test release.
> > >
> > > > And speaking of the "hostname", is this the \\hostname\path of an UNC?
> > > > In that case this will not work with WebDAV/SSL or WebDAV with custom
> > > > port, which might be \\webdavserver AT SSL\path or
> > > > \\webdavserver AT 23456\path, or \\webdavserver AT SSL@23456\path
> > > > You need to replace the L'@' with L'\0' before calling GetAddrInfoW(),
> > > > or it is not going to work with WebDAV
> > >
> > > I never saw that before.  Is that syntax really usable?
> > >
> > > I just spent half an hour trying to connect to a nextcloud instance
> > > using this syntax, but to no avail.  https://... works.
> > >
> > > I have a local patch removing this at-sign, but I would first like
> > > to hear if this is really usable and used.
> >
> > The BeeGFS Windows client uses that syntax to support more than one
> > metadata server config per host, i.e.
> > \\beegfs DOT example DOT com AT 14\beegfs\dir1\dir2....
>
> Oh, cool.  Can you check the latest Cygwin test release if it works
> better with BeeGFS?

https://cygwin.com/git/?p=newlib-cygwin.git;a=commit;h=4bcc6adec765ee8354bfc9e6c060c9d1c0c7bf46
works with BeeGFS, with @ in the UNC path
--
Internationalization&localization dev / 大阪大学
Takeshi Nishimura <takeshi DOT nishimura DOT linux AT gmail DOT com>


-- 
Internationalization&localization dev / 大阪大学
Takeshi Nishimura <takeshi DOT nishimura DOT linux AT gmail DOT com>

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