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From: Chris Faylor <cgf AT cygnus DOT com>
Date: Tue, 10 Oct 2000 14:05:43 -0400
To: "'cygwin AT sources DOT redhat DOT com'" <cygwin AT sources DOT redhat DOT com>
Subject: Re: Two snapshot bugs
Message-ID: <20001010140542.D3833@cygnus.com>
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References: <779F20BCCE5AD31186A50008C75D99791717B3 AT silldn_mail1 DOT sanwaint DOT com>
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In-Reply-To: <779F20BCCE5AD31186A50008C75D99791717B3@silldn_mail1.sanwaint.com>; from EFifer@sanwaint.com on Tue, Oct 10, 2000 at 06:08:53PM +0100

On Tue, Oct 10, 2000 at 06:08:53PM +0100, Fifer, Eric wrote:
>+ getcwd() seems to be busted:
>
>	#include <stdio.h>
>	main() { printf("getcwd=%s\n", getcwd(NULL, 0)); }
>
>  produces:
>
>	getcwd=(null)

In any description of getcwd that I"ve found, specifying '0' as the size
means that you allocate a zero length buffer.

The linux man page says this:

       As  an  extension  to the POSIX.1 standard, getcwd() allo-
       cates the buffer dynamically using malloc() if buf is NULL
       on  call.   In  this  case,  the  allocated buffer has the
       length size unless size is less than  zero,  when  buf  is
       allocated  as  big  as  necessary.   It  is possible (and,
       indeed, advisable) to free() the buffers if they have been
       obtained this way.

So 'getcwd (NULL, -1)' should return something but 'getcwd (NULL, 0)', IMO,
should not.

cgf

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