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Date: | Sat, 19 Jan 2002 14:44:49 +0200 |
From: | "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il> |
Sender: | halo1 AT zahav DOT net DOT il |
To: | Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk> |
Message-Id: | <3099-Sat19Jan2002144449+0200-eliz@is.elta.co.il> |
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CC: | djgpp-workers AT delorie DOT com |
In-reply-to: | <3C495559.C01A23AF@phekda.freeserve.co.uk> (message from Richard |
Dawe on Sat, 19 Jan 2002 11:15:37 +0000) | |
Subject: | Re: env.exe crash - reproducible test program |
References: | <10201180538 DOT AA24590 AT clio DOT rice DOT edu> <3C495559 DOT C01A23AF AT phekda DOT freeserve DOT co DOT uk> |
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> Date: Sat, 19 Jan 2002 11:15:37 +0000 > From: Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk> > > /* > > This routine assumes that the environ array and all strings it > points to were malloc'd. Nobody else should modify the environment > except crt1.c > > */ To clarify: what this comment _really_ wants to tell is that the original environ, the one putenv sees on its very first call, _must_ be malloc'ed. Once the first call was made (typically, by the startup code), it is okay to do what the test program did, i.e. replace environ with a non-malloc'ed array. It's quite possible that this explains the cause for the: If having $DJGPP undefined prevents putenv from being called during startup even once, putenv will indeed be unable to cope with such code. This suggests a solution: add a dummy putenv call to the startup code, which will be called unconditionally.
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