63 lines
1.7 KiB
Bash
63 lines
1.7 KiB
Bash
#!/bin/sh
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# Script which detect automaticaly the alsa-conf file to put
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# in place in function of board on which the script are executed.
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#
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# This script are use with systemd-generators
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# see man for more information or
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# https://www.freedesktop.org/software/systemd/man/systemd.generator.html
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#
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# How to debug:
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# mkdir /tmp/normal-dir /tmp/early-dir /tmp/late-dir
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# SYSTEMD_LOG_LEVEL=debug /lib/systemd/system-generators/system-generator-alsa-conf \
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# /tmp/normal-dir /tmp/early-dir /tmp/late-dir
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# find /tmp/normal-dir /tmp/early-dir /tmp/late-dir
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#
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#
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function debug_print() {
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if `echo $SYSTEMD_LOG_LEVEL |grep -q debug` ;
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then
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echo "[DEBUG] $@"
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fi
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}
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#
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# Main
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#
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if [ ! -d /proc/device-tree/ ];
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then
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debug_print "Proc Device tree are not available, Could not detect on which board we are"
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exit 1
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fi
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if [ -e /etc/asound.conf ];
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then
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LINE=`cat /etc/asound.conf | wc -l`
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if [ $LINE -lt 3 ];
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then
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# dummy asound.conf file contains only one comment
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debug_print "remove previous dummy asound.conf file"
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rm /etc/asound.conf
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else
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debug_print "asound.conf file already configured"
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exit 0
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fi
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fi
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# get the name file available for alsa-conf
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ALSA_CONF_FILES=`ls -1 /etc/asound-*`
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for f in $ALSA_CONF_FILES;
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do
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#extract name of board
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board=`echo $f | sed -e "s|/etc/asound-\(.*\).conf|\1|"`
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debug_print "board=$board"
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#search on device tree compatible entry if the board are present
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if `grep -q $board /proc/device-tree/compatible` ;
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then
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# device tree compatible entry match with board name
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debug_print "use $f for asound.conf"
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cp $f /etc/asound.conf
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break;
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fi
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done
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exit 0
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