Port connection-counting x4 bluetooth sensor to x2

[khatus.git] / x2 / src / bash / exe / khatus_sensor_bluetooth.sh

diff --git a/x2/src/bash/exe/khatus_sensor_bluetooth.sh b/x2/src/bash/exe/khatus_sensor_bluetooth.sh
new file mode 100644 (file)
index 0000000..4e696c8
--- /dev/null
+++ b/x2/src/bash/exe/khatus_sensor_bluetooth.sh
@@ -0,0 +1,21 @@
+#! /bin/sh
+
+set -e
+
+# TODO: Centralize the definitions of the constants, as in AWK code.
+FS1='|'  # Fields separator, level 1 (a record's fields)
+FS2=':'  # Fields separator, level 2 (a field's subfields)
+
+count_powered_controllers() {
+    bluetoothctl -- show | grep -c 'Powered: yes'
+}
+
+count_connected_devices() {
+    bluetoothctl -- paired-devices \
+    | awk '{print $2}' \
+    | xargs -I % bluetoothctl -- info % \
+    | grep -c 'Connected: yes'
+}
+
+printf "%s%s%d\n" 'count_powered_controllers' "$FS1" "$(count_powered_controllers)"
+printf "%s%s%d\n" 'count_connected_devices'   "$FS1" "$(count_connected_devices)"