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Date:      Sun, 2 Dec 2012 01:37:56 +0200
From:      Konstantin Belousov <kostikbel@gmail.com>
To:        Hiroki Sato <hrs@freebsd.org>
Cc:        yanegomi@gmail.com, rc@freebsd.org, current@freebsd.org
Subject:   Re: RFC: sysctl -f filename
Message-ID:  <20121201233756.GS3013@kib.kiev.ua>
In-Reply-To: <20121202.082150.896017277887885294.hrs@allbsd.org>
References:  <20121202.015048.1122480556487090170.hrs@allbsd.org> <CAGH67wTC50X1M2uUo0g=Nm6PmpOXPzYnp4tbXDCQyA9eOKB%2B7Q@mail.gmail.com> <CAGH67wShpcmOKhc09%2BMP5c-AOm7EAPG%2BGqv=J0PRq0sGuTzKRQ@mail.gmail.com> <20121202.082150.896017277887885294.hrs@allbsd.org>

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On Sun, Dec 02, 2012 at 08:21:50AM +0900, Hiroki Sato wrote:
> Garrett Cooper <yanegomi@gmail.com> wrote
>   in <CAGH67wShpcmOKhc09+MP5c-AOm7EAPG+Gqv=3DJ0PRq0sGuTzKRQ@mail.gmail.co=
m>:
>=20
> ya> On Sat, Dec 1, 2012 at 2:10 PM, Garrett Cooper <yanegomi@gmail.com> w=
rote:
> ya> >     Why change the tool when we can change the rc script to do the
> ya> > right thing? I have a patch I'm working on to resolve this (you hit=
 an
> ya> > itch I've been meaning to scratch for a little while).
> ya>
> ya>     This should work. I also refactored the script to get it down to
> ya> 80 columns. I've attached the debug output and the diff for the debug
> ya> version of the script.
>=20
>  You will find out the following test case does not work (this is one
>  of the test strings I used):
>=20
>  kern.domainname=3D"c$EDITOR.\"\ hoge\ \"\#hoge2\\$ \# h$$\#oge"#
>=20
>  The reason why I changed sysctl(8) was that the rc.d/sysctl script
>  was too complex and slow even if it could support meta characters in
>  shell script syntax.  I created several prototypes as script but
>  noticed that keeping consistency was quite difficult and
>  maintainability was poor due to tricky handling of variables.
>=20
>  Although my patch in the previous email does not support meta
>  characters completely, I still think it is more reasonable to
>  implement this functionality on the sysctl(8) side.
>=20
> -- Hiroki

I fully agree with the proposal to add the -f switch to the sysctl(8).
This is consistent with several other administrative tools. Putting
the ability to parse and apply arbitrary sysctl.conf-like file into=20
the rc script is weird.

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