Date: Mon, 30 Apr 2007 20:40:31 +0400 From: Andrey Chernov <ache@freebsd.org> To: John Baldwin <jhb@freebsd.org> Cc: cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/usr.sbin/sysinstall main.c Message-ID: <20070430164031.GA82368@nagual.pp.ru> In-Reply-To: <200704301229.21190.jhb@freebsd.org> References: <200704301516.l3UFGJbu019162@repoman.freebsd.org> <200704301229.21190.jhb@freebsd.org>
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On Mon, Apr 30, 2007 at 12:29:20PM -0400, John Baldwin wrote: > Have you coordinated at all with the guy on current@ who has patches to make > setenv(3) not leak memory as bad? No, I don't touch current allocation scheme at all. It isn't my goal. > Also, given that we malloc a limited space > for the string values, I don't see how you can make it so that one can always > just overwrite the string pointed to by putenv(3)'s return value to change > the value. If we malloc a buffer for length N and the user wants to set the > length to M > N, we pretty much have to malloc a new buffer that will end up > at a different address, so places holding onto the previous value returned > from putenv(3) will stop seeing updates. It isn't the issue. Putenv value supposed to live just up to the next putenv or setenv call, so setenv can legitimately overwrite it. -- http://ache.pp.ru/
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