Date: Thu, 24 Sep 2020 08:40:58 +0200 From: Stefan Esser <se@freebsd.org> To: Warner Losh <imp@bsdimp.com>, "Rodney W. Grimes" <rgrimes@freebsd.org> Cc: Kyle Evans <kevans@freebsd.org>, Alan Somers <asomers@freebsd.org>, Mateusz Guzik <mjguzik@gmail.com>, src-committers <src-committers@freebsd.org>, svn-src-all <svn-src-all@freebsd.org>, svn-src-head <svn-src-head@freebsd.org> Subject: Re: svn commit: r365643 - head/bin/cp Message-ID: <fc0903cf-fd1f-1c39-13f0-4902c5bc1cd9@freebsd.org> In-Reply-To: <CANCZdfoDpG85jSYs36-oWpxwYymTnVJ2dpAXyk9%2B3Ps7enODmw@mail.gmail.com> References: <CACNAnaH-L%2Bw=SJW1Cw1M63LQi19d%2Bf_8Sv%2BdYUTyE%2BjYQU6nbA@mail.gmail.com> <202009231656.08NGujEs042900@gndrsh.dnsmgr.net> <CANCZdfoDpG85jSYs36-oWpxwYymTnVJ2dpAXyk9%2B3Ps7enODmw@mail.gmail.com>
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From: Stefan Esser <se@freebsd.org>
To: Warner Losh <imp@bsdimp.com>, "Rodney W. Grimes" <rgrimes@freebsd.org>
Cc: Kyle Evans <kevans@freebsd.org>, Alan Somers <asomers@freebsd.org>,
Mateusz Guzik <mjguzik@gmail.com>,
src-committers <src-committers@freebsd.org>,
svn-src-all <svn-src-all@freebsd.org>,
svn-src-head <svn-src-head@freebsd.org>
Message-ID: <fc0903cf-fd1f-1c39-13f0-4902c5bc1cd9@freebsd.org>
Subject: Re: svn commit: r365643 - head/bin/cp
References: <CACNAnaH-L+w=SJW1Cw1M63LQi19d+f_8Sv+dYUTyE+jYQU6nbA@mail.gmail.com>
<202009231656.08NGujEs042900@gndrsh.dnsmgr.net>
<CANCZdfoDpG85jSYs36-oWpxwYymTnVJ2dpAXyk9+3Ps7enODmw@mail.gmail.com>
In-Reply-To: <CANCZdfoDpG85jSYs36-oWpxwYymTnVJ2dpAXyk9+3Ps7enODmw@mail.gmail.com>
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Am 23.09.20 um 19:23 schrieb Warner Losh> But for this issue, we're not=20
mounting devfs early enough.=C2=A0 We should
> fix that. Removing /dev/null from the boot process likely is never goin=
g=20
> to happen because we use it all over the place to discard output...=20
> There's ~200 instances of it in the boot rc scripts, so getting rid of =
> it there would also be quite the effort, with the same question.
Removal of /dev/null from rc.d scripts should be quite simple,
since most cases could just use ">-" (close file descriptor)
instead. Other usage could be substituted with ":>" followed
by chown.
I'd be willing to generate patches for review, if there is any
chance such a change might be accepted into -CURRENT.
I could not find any use of /dev/zero, but e.g. rc.d/syscons
uses ${kbddev} (i.e. /dev/ttyv0) and rc.d/zvol performs swapon
on /dev/zvol/${name}, rc.d/random uses /dev/random and so on.
But those further references to /dev nodes will in general be
NOPs if /dev is not available (some test for existence of the
node they rely on, other just fail trying to access them, but
without negative effect on going multi-user).
Regards, STefan
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