Date: Wed, 6 Oct 2010 15:12:34 -0700 From: Garrett Cooper <gcooper@FreeBSD.org> To: Devin Teske <dteske@vicor.com> Cc: freebsd-hackers@freebsd.org Subject: Re: sysconf -- a sysctl(8)-like utility for managing /etc/rc.conf et. al. Message-ID: <AANLkTikHW_9WKiZHH=Ci=m7qm9OgJ5DpS=d7Aa6NY51g@mail.gmail.com> In-Reply-To: <1286397912.27308.40.camel@localhost.localdomain> References: <1286397912.27308.40.camel@localhost.localdomain>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Oct 6, 2010 at 1:45 PM, Devin Teske <dteske@vicor.com> wrote:
> Hello fellow freebsd-hackers,
>
> Long-time hacker, first-time poster.
>
> I'd like to share a shell script that I wrote for FreeBSD system
> administration.
>
> The attached shell script works similar to sysctl(8), but rather than
> querying or working on sysctl MIBs, it instead works on the /etc/rc.conf
> (and /etc/rc.conf.local) files.
>
> Syntax shown below (available by running the script without arguments):
>
> Usage: sysconf [OPTIONS] name[=value] ...
> OPTIONS:
> -h --help Print this message to stderr and exit.
> -d Print list of internal dependencies before exit.
> -e Print query results as `var=value' (useful for producing
> output to be fed back in). Ignored if -n is specified.
> -n Show only variable values, not their names.
>
> ENVIRONMENT:
> SYSCONF_SHOW_DEPS Dump list of dependencies. Must be zero or one
> (default: `0')
> RC_DEFAULTS Location of `/etc/defaults/rc.conf' file.
>
> Examples:
>
> root@mymachine ~ $ sysconf hostname
> hostname: mymachine.localdomain
> root@mymachine ~ $ sysconf hostname=foomaster.deluxe.com
> hostname: mymachine.localdomain -> foomaster.deluex.com
> root@mymachine ~ $ sysconf -e hostname
> hostname="foomaster.deluxe.com"
> root@mymachine ~ $ sysconf -n hostname
> foomaster.deluxe.com
>
> The script has zero external dependencies. None. Period. It will use
> grep(1) if installed, but it is not required.
>
> Tested extensively on FreeBSD-4.8, FreeBSD-4.11, FreeBSD-8.0, and
> FreeBSD-8.1.
I haven't looked at this yet, but this will result in user
confusion as it differs in purpose from sysconf(3) (which is a POSIX
API that helps determine system configuration tunable variables)...
Thanks,
-Garrett
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?AANLkTikHW_9WKiZHH=Ci=m7qm9OgJ5DpS=d7Aa6NY51g>