Date: Sun, 8 Jul 2007 18:59:16 +0400 From: Andrey Chernov <ache@nagual.pp.ru> To: Dirk Meyer <dirk.meyer@dinoex.sub.org> Cc: freebsd-current@freebsd.org Subject: Re: HEADS UP: getenv() and family API change Message-ID: <20070708145916.GA88793@nagual.pp.ru> In-Reply-To: <Xuu8UV3Bay@dmeyer.dinoex.sub.org> References: <20070703182400.Q1449@baba.farley.org> <Xuu8UV3Bay@dmeyer.dinoex.sub.org>
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On Sun, Jul 08, 2007 at 04:13:49PM +0200, Dirk Meyer wrote: > Hallo Sean C. Farley, > > > Changes in moving to POSIX from historic BSD API: > > b. putenv takes a char * instead of const char *. > > c. putenv no longer makes a copy of the input string. > > Can you give more details? > See POSIX description http://www.opengroup.org/onlinepubs/009695399/functions/putenv.html > An application will break in using this: > putenv("PATH=/bin") > > now taking a char *, this will break with gcc42. No break, this is illegal call (because this const _contents_ may be changed with the yet one putenv call). Why do you think gcc uses tlink.c: putenv (xstrdup ("COMPILER_PATH=")); in its own internal code? (like many others) -- http://ache.pp.ru/
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