1 files changed, 41 insertions, 0 deletions
diff --git a/monitor.sh b/monitor.sh
new file mode 100755
index 0000000..57fd1bc
--- /dev/null
+++ b/monitor.sh
@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# PURPOSE: when I touch a middle-button at my headset directly connected
+#          to Lenovo T530, I want to trigger a custom action (screen lock)
+
+hook_on() {
+	{ xscreensaver-command -restart || ( xscreensaver& ) ; true; }
+	sleep 1
+	xscreensaver-command -lock
+}
+
+hook_off() {
+	true
+}
+
+status=0
+trap 'status=1' USR1
+while read line; do
+	case "$line" in
+	"card 0, #19 (0,0,0,Mic Jack,0) VALUE"*)
+		#echo 0, $status
+		[ $status -ne 0 ] || status=1;;
+	"card 0, #13 (2,0,0,Mic Boost Volume,0) VALUE"*)
+		#echo 2, $status
+		[ $status -ne 1 ] || status=2
+		[ $status -ne 20 ] || status=21;;
+	"card 0, #15 (2,0,0,Internal Mic Boost Volume,0) VALUE"*)
+		#echo 3, $status
+		[ $status -ne 2 ] || status=3
+		[ $status -ne 1 ] || status=20;;
+	"card 0, #12 (2,0,0,Capture Switch,0) VALUE"*)
+		#echo 4, $status
+		[ $status -ne 4 ] || { hook_on; status=0; }
+		[ $status -ne 3 ] || status=4
+		[ $status -ne 21 ] || { hook_off; status=0; };;
+	*)
+		#echo 5
+		status=0;;
+	esac
+	{ sleep 1; kill -USR1 $$; } &
+done < <(script -qc 'alsactl monitor' /dev/null)