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Date: Thu, 3 Mar 2005 05:51:36 +1100
From: Peter Jeremy <PeterJeremy@optushome.com.au>
To: Rob <spamrefuse@yahoo.com>
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cc: FreeBSD Stable <freebsd-stable@freebsd.org>
Subject: Re: kernel config: sound device with or without quotes
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On Wed, 2005-Mar-02 02:46:41 -0800, Rob wrote:
>In /usr/src/sys/conf/NOTES is the list of supported
>sound devices. I get confused by the pressence and
>absence of quotes here. Are these quotes only
>decoration, or really needed. For example:
>
>device          "snd_ad1816"
>device          snd_cmi
>
>If they are needed, it confuses me why one sound
>device needs quotes, and another doesn't?

For hysterical raisins, config(8) parses bareword arguments to "device" as
<perl>
	($device_name, $device_instance) = /([a-zA-Z_]+)([0-9]*)/;
</perl>

The double quotes force the first entry to be treated as a device
"snd_ad1816", rather than the 1817th instance of "snd_ad".

>How does that affect the use of loading them in
>/boot/loader.conf? How about following two:
>
>snd_ad1816_load="YES"
>snd_cmi_load="YES"
>
>Is that OK?

Yes.  The loader has a different parsing algorithm:
${device_name}_load="{YES,NO}"
and
hint.$device_name.$device_instance.flag="VALUE"

-- 
Peter Jeremy