Handle case where no rate information is available (e.g. when wireless mouse with acpi integration is plugged)

battery-monitor.sh

@@ -3,7 +3,7 @@ set -e
 trap 'xmessage -nearmouse "WARNING: battery monitor died!"' EXIT
 was_notified=0
 while true; do
-    acpi_data=$(acpi -b)
+    acpi_data=$(acpi -b | grep -v 'rate information unavailable' | head -n1)
     status=$(echo -n "$acpi_data" | awk -F'[,:%]' '{print $2}')
     capacity=$(echo -n "$acpi_data" | awk -F'[,:%]' '{print $3}')
     echo "Status: $status; Capacity: $capacity; was_notified: $was_notified"
@@ -15,7 +15,7 @@ while true; do
         was_notified=1
     fi
     if [[ "$status" =~ "Discharging" && "$capacity" -lt 10 ]]; then
-        bash -c 'echo "Battery critical, suspending"; acpi -b' | xmessage -nearmouse -file -&
+        echo -e "Battery critical, suspending\n$acpi_data" | xmessage -nearmouse -file -&
         sleep 5
         systemctl suspend
         sleep 600 # Wait 10 minutes, so we only hibernate once