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Reply-To: moss AT cs DOT umass DOT edu
Subject: Re: Help with C clearenv and setenv
To: cygwin AT cygwin DOT com
References: <CABHT962nB5jK2sNP9jGaVEbWGrvD72hBVN_q6xX9TKuq3yQ0Gg AT mail DOT gmail DOT com> <5f1c24df-3312-4497-9b39-7b96a85de982 AT gmail DOT com>
From: Eliot Moss <moss AT cs DOT umass DOT edu>
Message-ID: <178a4992-d334-d2f1-55d9-597324c20b52@cs.umass.edu>
Date: Thu, 31 May 2018 08:15:55 -0400
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On 5/30/2018 11:56 PM, Marco Atzeri wrote:
 > On 5/30/2018 4:48 PM, Sam Habiel wrote:

 > environ = calloc(1, sizeof(*environ))

Indeed, this does not surprise me since environ is supposed
to be a pointer to an array of char *, whose last entry is
NULL.  So the above line is the one needed.  It *might*
also work to do something like:

char *dummy = NULL;
environ = &dummy;

This avoids an allocation call.

-- Eliot Moss

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