Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
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
Date: Thu, 13 Jan 2005 12:44:24 -0800
From: Yitzchak Scott-Thoennes <sthoenna AT efn DOT org>
To: cygwin AT cygwin DOT com
Subject: Re: cygwin programs called from non-cygwin programs mauling \" in args
Message-ID: <20050113204424.GD3880@efn.org>
References: <20050113064248 DOT GA2416 AT efn DOT org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20050113064248.GA2416@efn.org>
User-Agent: Mutt/1.4.1i
Organization: bs"d
X-IsSubscribed: yes

On Wed, Jan 12, 2005 at 10:42:48PM -0800, Yitzchak Scott-Thoennes wrote:
> Given a simple child process that prints its argument, and a parent
> that execs it passing a\"b\"c, trying combinations of cygwin and non-
> cygwin parent and child shows inconsistency in what's received:
> 
> $ cat child.c
> #include <stdio.h>
> int main(int argc, char **argv)
> {
>   printf("[%s]\n", argv[1]);
>   return 0;
> }
> 
> $ cat parent.c
> #include <unistd.h>
> int main(int argc, char **argv) {
>   char *args[] = { argv[1], "a\\\"b\\\"c", 0};
>   execv( argv[1], args);
>   return 1;
> }
> 
> $ gcc -mno-cygwin -Wall child.c -o nocygchild
> 
> $ gcc -mno-cygwin -Wall parent.c -o nocygparent
> parent.c: In function `main':
> parent.c:4: warning: passing arg 2 of `execv' from incompatible pointer type

Incidentally, that warning is due to mingw having a non-compliant prototype.

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