Date: Fri, 11 May 2012 22:10:47 +0400 From: Andrey Chernov <ache@FreeBSD.ORG> To: Garrett Cooper <yanegomi@gmail.com> Cc: Konstantin Belousov <kostikbel@gmail.com>, svn-src-head@FreeBSD.ORG, svn-src-all@FreeBSD.ORG, src-committers@FreeBSD.ORG, Konstantin Belousov <kib@FreeBSD.ORG> Subject: Re: svn commit: r235266 - head/lib/libc/stdlib Message-ID: <20120511181047.GA21793@vniz.net> In-Reply-To: <CAGH67wQnd7rwwUn1ep-3QJzYOdtQ5OayMvLVMBJvVCu6iPtBPg@mail.gmail.com> References: <201205111129.q4BBT85G081093@svn.freebsd.org> <20120511145432.GA19173@vniz.net> <20120511170412.GR2358@deviant.kiev.zoral.com.ua> <CAGH67wQnd7rwwUn1ep-3QJzYOdtQ5OayMvLVMBJvVCu6iPtBPg@mail.gmail.com>
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On Fri, May 11, 2012 at 10:55:39AM -0700, Garrett Cooper wrote: > On Fri, May 11, 2012 at 10:04 AM, Konstantin Belousov > <kostikbel@gmail.com> wrote: > > On Fri, May 11, 2012 at 06:54:32PM +0400, Andrey Chernov wrote: > >> Thanks, but in this two places old errno value should be saved across > >> free() because free() may damage it: > > I do not agree. free() cannot change errno. > > It might depending on the OS (logically it shouldn't, but I > digress), but there was some recent discussion on the POSIX list about > errno not being mangled via free: > http://austingroupbugs.net/view.php?id=385 . Yes. The initial paragraph from it states pretty clear: Line 25639 [XSH errno] is explicit that "The setting of errno after a successful call to a function is unspecified unless the description of that function specifies that errno shall not be modified." However, free() does not mention its interaction with errno. -- http://ache.vniz.net/
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