Date: Sat, 18 Oct 2014 19:38:19 -0700 From: Alfred Perlstein <bright@mu.org> To: Adrian Chadd <adrian@freebsd.org> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@ntlworld.com> Subject: Re: nosh version 1.9 Message-ID: <34F30D28-DE9B-444F-885E-F438FEEA46EC@mu.org> In-Reply-To: <CAJ-VmomhxAkmVpAv5M%2Bh2HiEGnzHuXoZRh=E3LEvcRqbkoJ-5Q@mail.gmail.com> References: <54430B41.3010301@NTLWorld.com> <5443191E.5050208@mu.org> <CAJ-VmomhxAkmVpAv5M%2Bh2HiEGnzHuXoZRh=E3LEvcRqbkoJ-5Q@mail.gmail.com>
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Adding lazy variable extension to sh should be relatively easy.=20 Sent from my iPhone > On Oct 18, 2014, at 7:16 PM, Adrian Chadd <adrian@freebsd.org> wrote: >=20 >> On 18 October 2014 18:51, Alfred Perlstein <bright@mu.org> wrote: >> Very cool. >>=20 >> Wondering about the idea of /etc/rc.conf *not* being a shell script... th= is >> is sort of bad imo as I can't see any other way to provide the settings >> dynamically for the startup scripts at a glance. >>=20 >> I'll give you an example... FreeNAS (and by extension the appliance we ar= e >> building at Norse) has /etc/rc.conf.local as a shell script that pulls da= ta >> from an sqlite database, this allows us to set various services on/off ba= sed >> on the contents of that sqlite database file. >>=20 >> This in turn allows us to leverage most of the existing /etc/rc.d and by >> extension the /usr/local/etc/rc.d files provided by ports. >>=20 >> I'm wondering how one could still do that if /etc/rc.conf and >> /etc/rc.conf.local were no longer scripts? >=20 > The same way /etc/rc.conf and /etc/rc.conf.local is pulled in - via > the little snippet of stuff at the end of /etc/defaults/rc.conf , and > this bit of config in that file: >=20 > local_startup=3D"/usr/local/etc/rc.d" # startup script dirs. > script_name_sep=3D" " # Change if your startup scripts' names contain s= paces > rc_conf_files=3D"/etc/rc.conf /etc/rc.conf.local" >=20 > So, we just need some method of pulling in environment variables in > whatever order we need from whatever place we need. >=20 > (God, why do I know this stuff? Then I remembered - > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D17595 . God damnit.) >=20 > The tricky bit is trying to make it so we don't call sqlite like a > thousand times to pull out all of the environment variables for each > invocation of an rc script. >=20 >=20 > -adrian > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"= >=20
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