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Date:      Sun, 4 Nov 2007 20:50:03 +0000 (UTC)
From:      Marcin Wisnicki <mwisnicki+freebsd@gmail.com>
To:        freebsd-current@freebsd.org
Subject:   Re: [PATCH] Overriding rc.conf in loader
Message-ID:  <fglb9r$4cp$1@ger.gmane.org>
References:  <fgkqpu$rhp$1@ger.gmane.org> <472E041D.3090801@conducive.net>

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On Sun, 04 Nov 2007 12:40:45 -0500, 韓家標 Bill Hacker wrote:

> Marcin Wisnicki wrote:
>> Hi
>> 
>> I thought it would be nice if there was a way to override rc.conf
>> variables during boot. Proposed patch implements this using kenv.
>> 
>> With it, you can override any rc variable from loader.conf by prefixing
>> its name with 'rc.', some useful examples:
>> 
> Pardon my stupidity... but does this over-ride over rides with other
> over rides...
> 
> or what?

Pretty much, yes. Assuming I didn't overlook something, the order of
assignment is following:

1. suck in /etc/defaults/rc.conf
2. try to set $rc_conf_files from kenv rc.rc_conf_files [*]
   otherwise leave it as defined in defaults
3. source $rc_conf_files
4. source /etc/rc.conf.d/$name_of_script
5. for each kenv variable named rc.$var set $var [*]

lines marked by [*] are added by my patch

> 
> ..and if so, ISTR there may be a better way already...
> 

Not that I know of.




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