Update 2023-04-10 13:26 OpenBSD/amd64

.bin/setaudio

@@ -1,25 +1,36 @@
 #!/bin/ksh
 
+# set the sound device via argument
 [ ! -z $1 ] && sndioctl -q server.device=$1
 
+# we need if a few times, and caching is faster
 DUMP=$(dmesg)
+
+# save the current active sound device
 _cur=$(sndioctl -n server.device)
 
-examine() {
+# starting from dev 4, you need to cd /dev && sh MAKEDEV audioX
-    _type=$(echo "$1" | cut -d" " -f3)
-    _number=$(echo "$1" | cut -d" " -f1 | sed 's/[a-z]//g')
-    _desc=$(echo "$DUMP" | grep -E "^$_type at.*" | tail -1 | cut -d'"' -f2)
-    [ -z $_number ] && return
-
-    if [ $_cur -eq $_number ]
-    then
-        [ ! -z $_number ] && echo "> $_number: $_desc"
-    else
-        [ ! -z $_number ] && echo "  $_number: $_desc"
-    fi
-}
-
 for i in 0 1 2 3 4 5 6
 do
-    examine "$(echo "$DUMP" | grep -E "^audio$i\ at.*" | tail -1)"
+    # find audio line
+    _input="$(echo "$DUMP" | grep -E "^audio$i\ at.*" | tail -1)"
+
+    # take the number from audioX, then grep for what's attached to find
+    # the last description for this device (usb devices may change order
+    # during runtime)
+
+    _type=$(echo "$_input" | cut -d" " -f3)
+    _number=$(echo "$_input" | cut -d" " -f1 | sed 's/[a-z]//g')
+    _desc=$(echo "$DUMP" | grep -E "^$_type at.*" | tail -1 | cut -d'"' -f2)
+
+    # Once we walked to the first non-existing device, we can stop.
+    [ -z $_number ] && exit 0
+
+    # Show the device list and mark the current one
+    if [ $_cur -eq $_number ]
+    then
+        echo "> $_number: $_desc"
+    else
+        echo "  $_number: $_desc"
+    fi
 done