From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <corinna-cygwin@cygwin.com>
Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.130])
	by sourceware.org (Postfix) with ESMTPS id A4C863858D32
	for <cygwin@cygwin.com>; Sun, 22 Jan 2023 19:21:18 +0000 (GMT)
Authentication-Results: sourceware.org; dmarc=permerror header.from=cygwin.com
Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=cygwin.com
Received: from calimero.vinschen.de ([24.134.7.25]) by
 mrelayeu.kundenserver.de (mreue009 [212.227.15.167]) with ESMTPSA (Nemesis)
 id 1MwQKr-1oRQmv3Rh7-00sMpK; Sun, 22 Jan 2023 20:21:16 +0100
Received: by calimero.vinschen.de (Postfix, from userid 500)
	id BE217A80C97; Sun, 22 Jan 2023 20:21:15 +0100 (CET)
Date: Sun, 22 Jan 2023 20:21:15 +0100
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Cc: Jeremy Hetzler <jeremyhetzler@gmail.com>
Subject: Re: [bug?] cygwin cannot mount smb shares beginning with underscore;
 "Invalid argument"
Message-ID: <Y82MqzKDg1L/wjHE@calimero.vinschen.de>
Reply-To: cygwin@cygwin.com
Mail-Followup-To: cygwin@cygwin.com,
	Jeremy Hetzler <jeremyhetzler@gmail.com>
References: <CAOh4nm=ODyjhx37j2L-9NMq0BRk+B+xjWNHyCdZ7hbMwrg=0aw@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <CAOh4nm=ODyjhx37j2L-9NMq0BRk+B+xjWNHyCdZ7hbMwrg=0aw@mail.gmail.com>
X-Provags-ID: V03:K1:AiYfjMxvTX8XW7byxLiCO2jnleVR2HyUoi4zOBFdQ0HhpGbbX3B
 luJBVqtCqz2KUs0QgUotLmOCH5/jMux+Yh/wH+im/HzJVypR8/dWWDdXITQKhnkdBPQR61+
 3nyJCzV8X8iL9fb2XhxKewxxPHYjEisvNdD76gtAH4Xw+OflQhrzHFiVf5mMWl9b5Mo1nK7
 mwhuk8t7W+P13CORWCOPg==
UI-OutboundReport: notjunk:1;M01:P0:BjkAdfQ81lQ=;OPCxD99b0ZOEHJkl2w9H/MHev0l
 5ts5SPCmP8niR+KzhcR3/EX4lFdF+vAK+uDTMt0wBd+DlSmc3Utn88B4fg4uVuWeuNgiwQaYD
 4bFb1dHWnW+FlafhVrlrbjJ7ov2eVR06jYSLaUz+k5AQnHVQofGeCsoaxAv4LD/skdrYzDFog
 eXyRXv9HljrqscppbhiWALV/nXQ27CGEf4MkH4C7LTL8LQAIdKfRZATbBEOSpihhIbkMBK8lq
 O5Wqh1uywdEQlLKAGmQGdVHtR0pHpr+wL3wVGtKS+Mj+O2pPeDjhd7NvwUbVoGlaVQ/oRncCs
 ONOU+s7gnEo2O/AleSsREDudjcd70VEvzMeFZSzmwVdHRivUED38XWmSWOIN+9mR+owEDBS/Q
 svDt+12uFL8SKo5mGxp6qhgGbkqR1cxSUhvhGJxwWmsiKmER9fQ88c+Qf2a/kKo1BOmG9SN5z
 RP3iQrcWSAMlsM1BpXtVL5I7bjgK+MqIoSX5syms2HYG/9mi598dAFTGO0hP5Nmm4PnrlsMyY
 t7tA+uwr98WB1FPgjTcO1U6FMCeFusQepfBK7aj9hSn/9wnXLS/1jPGmLUKgUSOb1bHIsDcpp
 cHB5MZzooWbRxxnVER0DwxelQMHOlpOww6luWYfU49GZxow9dmmwzgr8Ext8qCpH3CGN5+LG6
 7PPPxcgSwGRv41PG6YoaHQR6yleJAZY8gokpe7NWmA==
X-Spam-Status: No, score=-97.2 required=5.0 tests=BAYES_00,GOOD_FROM_CORINNA_CYGWIN,KAM_DMARC_STATUS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_FAIL,SPF_HELO_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org
List-Id: <cygwin.cygwin.com>

On Jan 21 11:30, Jeremy Hetzler via Cygwin wrote:
> All,
> 
> First, thank you for many years of Cygwin.
> 
> I'm unable to get Cygwin to mount Windows SMB shares where the share
> name begins with underscore. mount gives an error "Invalid argument".

Yes, that's actually a bug.  The mount code path in Cygwin checks
the path for being a share (i.e. \\server\share\... syntax)

The code, which, incidentally, has only been marginally changed since
its inception pre-2000, is expecting that server name as well as share
name both start with an alphanumeric ASCII char.

That means, right now you can't mount servers and shares starting with
any character other than [0-9a-zA-Z].  D'oh.

I pushed a patch and the Cygwin test release 3.5.0-0.138.g6338d2f24a60
is building while I'm replying.  Should be up in an hour or so.


Thanks,
Corinna