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Date: Fri, 26 Aug 2005 11:13:52 -0400
From: Christopher Faylor <cgf-no-personal-reply-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Problem with sh/bash and snapshot cygwin1-20050825.dll
Message-ID: <20050826151352.GI12490@trixie.casa.cgf.cx>
Reply-To: cygwin AT cygwin DOT com
References: <082620051456 DOT 7539 DOT 430F2DAE0006648800001D7322007613940A050E040D0C079D0A AT comcast DOT net>
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User-Agent: Mutt/1.5.8i

On Fri, Aug 26, 2005 at 02:56:46PM +0000, Eric Blake wrote:
>> On Fri, Aug 26, 2005 at 06:17:13AM -0600, Eric Blake wrote:
>> >While you're at it, fix realpath(NULL, buf) to set buf[0]='\0', instead of
>> >leaving garbage there.
>> 
>> What's the rationale for touching buf when realpath is returning an error
>> and setting EINVAL?
>
>Because POSIX states that buf is indeterminate on error, and
>because Corrina's patch caused a regression (ie. 1.5.18 was
>setting buf[0] to 0 on error).  QofI states that we might as
>well make the indeterminate buffer useful, in case a user
>forgets to check the return value being NULL.

linux leaves the buffer alone, as far as I can tell.

cgf

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