Date: Fri, 30 Dec 2011 14:12:29 +0100 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: Xin LI <delphij@gmail.com> Cc: Kostik Belousov <kostikbel@gmail.com>, arch@freebsd.org, kan@freebsd.org Subject: Re: fdlopen(3) Message-ID: <867h1enqyq.fsf@ds4.des.no> In-Reply-To: <CAGMYy3u7PTEOpf537X5Dbp998zna5Qv5h2-gjwschGDYb%2B2nuQ@mail.gmail.com> (Xin LI's message of "Thu, 29 Dec 2011 10:20:41 -0800") References: <20111229084308.GD50300@deviant.kiev.zoral.com.ua> <CAGMYy3u6v-Ypo_wJEqWWGgGUjoTr=Ctx6tn6VV4fWM4nTYonrQ@mail.gmail.com> <20111229113829.GF50300@deviant.kiev.zoral.com.ua> <CAGMYy3u7PTEOpf537X5Dbp998zna5Qv5h2-gjwschGDYb%2B2nuQ@mail.gmail.com>
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Xin LI <delphij@gmail.com> writes: > Kostik Belousov <kostikbel@gmail.com> writes: > > Xin LI <delphij@gmail.com> writes: > > > Will this prevent e.g. writes to the .so file after open, but > > > before fdlopen()? > > How can it ? Even in theory ? > e.g. process 1 open(), check for permissions, etc., then process 2 > open() for write, write something, then process proceed with > fdlopen()? (We do not have mandatory "lock" on file handles to > prevent writing I think?). I think Kostik meant "how could you, even in theory, prevent this from happening", and the answer is that you can't. DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no
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