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Date: Fri, 19 Feb 2010 13:52:48 +0100
Message-ID: <98f79fac1002190452h2d99cf0aqf5ca72d952521da0@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
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On Fri, Feb 19, 2010 at 1:37 PM, Piotr Krukowiecki wrote:
> 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.
[...]
> 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?

There's another confusing behaviour: backslashes seem to be treated as
escape characters only if inside quotes:

Command: F:\t\dumpargs_gcc.exe  "\\foo" \\bar
/cygdrive/f/t/dumpargs_gcc
\foo
\\bar

Command: F:\t\dumpargs_cl.exe  "\\foo" \\bar
F:\t\dumpargs_cl.exe
\\foo
\\bar

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