Date: Wed, 10 Mar 2004 13:29:59 -0500 From: John Baldwin <jhb@FreeBSD.org> To: current@freebsd.org Subject: /etc/rc.d/mixer script for review.. Message-ID: <200403101329.59106.jhb@FreeBSD.org>
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The default volume levels on my laptop (75:75) are rather loud when using
headphones, and I found myself constantly having to pop up a terminal window
to run mixer before listening to mp3's, etc. So, during a fit of boredom, I
wrote a simple mixer rc.d script that adjusts mixer values based on an
optional /etc/mixer.conf. It only works with /dev/mixer though and doesn't
support multiple sound cards, mostly because I couldn't think of a sane but
simple syntax for mixer.conf. The script and a sample mixer.conf are below.
I'm not sure where to send this for review (moving the rc list to
@FreeBSD.org would be helpful perhaps) so I'm splatting it here.
---- mixer
#!/bin/sh -
#
# Copyright (c) 2004 The FreeBSD Project
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#
# PROVIDE: mixer
# REQUIRE: LOGIN usbd
# KEYWORD: FreeBSD
. /etc/rc.subr
name="mixer"
stop_cmd=":"
start_cmd="mixer_start"
reload_cmd="mixer_start"
extra_commands="reload"
mixer_start()
{
#
# Read in /etc/mixer.conf and set things accordingly
#
if [ -f /etc/mixer.conf -a -r /dev/mixer ]; then
while read mixer comments
do
case ${mixer} in
\#*|'')
;;
*)
dev=${mixer%=*}
val=${mixer#*=}
case ${val} in
*:*)
;;
*)
val=${val}:${val}
;;
esac
if current_value=`mixer ${dev} 2>/dev/null`; then
current_value=`echo ${current_value} |\
awk '{ print $7 }'`
case ${current_value} in
${val})
;;
*)
mixer ${dev} ${val}
;;
esac
else
warn "mixer ${dev} does not exist."
fi
;;
esac
done < /etc/mixer.conf
fi
}
load_rc_config $name
run_rc_command "$1"
---- mixer.conf
# $FreeBSD$
#
# Sound mixer settings.
vol=40 # not too loud, please!
pcm=50
--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
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