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Date:      Sat, 24 Feb 2018 23:23:46 +0100
From:      Joerg Sonnenberger <joerg@bec.de>
To:        Eitan Adler <lists@eitanadler.com>
Cc:        Jilles Tjoelker <jilles@stack.nl>, FreeBSD Hackers <freebsd-hackers@freebsd.org>, Garrett Wollman <wollman@csail.mit.edu>, FreeBSD Standards <freebsd-standards@freebsd.org>
Subject:   Re: Marking select(2) as restrict
Message-ID:  <20180224222346.GB16529@britannica.bec.de>
In-Reply-To: <CAF6rxg=-nBz8caa1Wn1Labn3DydpEO6B8W9PaLhNKYFwGvuZxw@mail.gmail.com>
References:  <CAF6rxg=wNVgDUF9o744ngmzPNeHB3hqdrLufy=yS3D4osczxFQ@mail.gmail.com> <20180221104400.GU94212@kib.kiev.ua> <23181.46427.671514.319710@khavrinen.csail.mit.edu> <20180221185920.GA94212@kib.kiev.ua> <23181.50488.186767.579361@khavrinen.csail.mit.edu> <20180221201002.GC94212@kib.kiev.ua> <23181.54825.511195.393054@khavrinen.csail.mit.edu> <20180222212746.GB58772@stack.nl> <CAF6rxgkW=Fgh4%2B1-aJG=VUCYso9gcKnER17UOiBy8GtTMsJNYQ@mail.gmail.com> <CAF6rxg=-nBz8caa1Wn1Labn3DydpEO6B8W9PaLhNKYFwGvuZxw@mail.gmail.com>

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On Sat, Feb 24, 2018 at 10:35:23AM -0800, Eitan Adler wrote:
> The main concern is that things /might/ break in undetectable was.

This argument puzzles me quite a bit. The code here is *already* broken
and depends on unspecified behavior of the kernel, i.e. the order in
which the fdsets are copied in/out.

Joerg



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