X-Recipient: archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status: No, hits=-1.3 required=5.0 	tests=AWL,BAYES_00,SARE_MSGID_LONG40,SPF_PASS
X-Spam-Check-By: sourceware.org
MIME-Version: 1.0
In-Reply-To: <4B7DA704.1080709@cygwin.com>
References: <98f79fac1002180955m1ddea014id0b27cc3b909a17a AT mail DOT gmail DOT com> 	 <4B7D80B3 DOT 4000300 AT cygwin DOT com> 	 <98f79fac1002181224g7987690dn6822d025d1a59405 AT mail DOT gmail DOT com> 	 <4B7DA704 DOT 1080709 AT cygwin DOT com>
Date: Fri, 19 Feb 2010 13:37:34 +0100
Message-ID: <98f79fac1002190437g5fec3138mb2c7e24d8f03212a@mail.gmail.com>
Subject: Re: CreateProcess() - executed program gets different argument  	depending if it's compiled with gcc (cygwin) or cl (VS)?
From: Piotr Krukowiecki <piotr DOT krukowiecki DOT news AT gmail DOT com>
To: cygwin AT cygwin DOT com
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-IsSubscribed: yes
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

On Thu, Feb 18, 2010 at 9:45 PM, Larry Hall (Cygwin) wrote:
> On 02/18/2010 03:24 PM, Piotr Krukowiecki wrote:
>> On Thu, Feb 18, 2010 at 7:02 PM, Larry Hall (Cygwin)
>>> On 02/18/2010 12:55 PM, Piotr Krukowiecki wrote:
>>>> - if the executed program is compiled with cygwin's gcc the program
>>>> receives \127.0.0.127\foo.cxx (just one backslash at the begining).
>>>> - if it's compiled with cl it gets \\127.0.0.127\foo.cxx (double
>>>> backslash - what I expected)
>>>
>>> '\' is an escape character in C, Unix, and Linux. =A0In Windows, it's a
>>> path separator. =A0Use '/' instead when working with Cygwin and you'll
>>> avoid allot of problems. =A0Better yet, use POSIX paths exclusively.
>>
>> "\\hostname" is remote path location, I don't think I can use
>> "//hostname" instead, either for cygwin program and especially not for
>> not-cygwin program, can I? (can't check it now)
>
> With Windows, you're free to use either path separator. =A0With Cygwin,
> you're life will be easier if you use '/' though it will accept '\' too if
> properly escaped.
>
> Cygwin understands UNC path syntax using '/'. =A0I would expect
> Windows to be cranky about '//' as a UNC path indicator though.
> If you need the source to compile, link, and run appropriately
> on either compiler, then you need to port it so it will, if that's
> what you're concerned about.

ok, so it works for paths - but what about other arguments, that are
not paths, just simple strings? They are also changed.
String "search \\me" is not the same as "search //me".

Example: given two "grep"-like programs, one compiled with cygwin, one
compiled without cygwin, I have to CreateProcess() with different
argument (different search string) to achieve same results - otherwise
one will search a file for "search \me" and the other for "search
\\me".

I don't know which program (cygwin/windows) is going to be executed.
Do I have to check before execution if the program is compiled under
cygwin and implement different logic in that case? From what I
understood so far this is the only way?


--=20
Piotr Krukowiecki

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple