Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sources.redhat.com Delivered-To: mailing list cygwin@sources.redhat.com From: Chris Faylor Date: Tue, 10 Oct 2000 14:05:43 -0400 To: "'cygwin@sources.redhat.com'" Subject: Re: Two snapshot bugs Message-ID: <20001010140542.D3833@cygnus.com> Reply-To: cygwin@sources.redhat.com Mail-Followup-To: "'cygwin@sources.redhat.com'" References: <779F20BCCE5AD31186A50008C75D99791717B3@silldn_mail1.sanwaint.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.6i 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 > 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 -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com