Based on the approach in that script (the one that 'universally' works
for me and Carsten), I've made a script that creates the udev rules file
and adds it to the list of backed up files. So this would replace steps
1, 2 and 3 above - put this script into a file, make it executable, then
run it with the name of your sound card as the only command line
parameter, e.g. './imaketherules.sh DAC'
I call it 'imaketherules.sh' :)
Code:
--------------------
#!/bin/sh
# one command line parameter: the name of the 'CARD', as used in the
squeezelite command line
cardname=$1
# look for cardname in /proc/asound/cards to determine card number
cardno=$(cat /proc/asound/cards | grep -m 1 $cardname | awk {'print $1'})
# extract idVendor and idProduct from /proc/asound/card<n>/usbid
usbid=$(cat /proc/asound/card$cardno/usbid)
idVendor=$(echo $usbid | awk -F: {'print $1'})
idProduct=$(echo $usbid | awk -F: {'print $2'})
# create udev rules
rule_add='SUBSYSTEM=="usb", ACTION=="add", ATTR{idVendor}=="'$idVendor'",
ATTR{idProduct}=="'$idProduct'", RUN+="/home/tc/SQLITE-control.sh restart
$kernel'
rule_remove='SUBSYSTEM=="usb", ACTION=="remove",
RUN+="/home/tc/SQLITE-control.sh stop $kernel'
# create rules file
rulesfile=etc/udev/rules.d/10-$cardname.rules
echo $rule_add > /$rulesfile
echo $rule_remove >> /$rulesfile
# add rules file to /opt/.filetool.lst
sed -i "\#$rulesfile#d" /opt/.filetool.lst #remove all previous matching
entries, to make sure it's only listed once
echo $rulesfile >> /opt/.filetool.lst
--------------------
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