From dafb51d34e531a229f07df5cc245a439f261d0da Mon Sep 17 00:00:00 2001
From: David Sutton <davidsutton@ausocean.org>
Date: Tue, 4 Apr 2023 14:42:36 +0930
Subject: [PATCH] local-looper: Utilise service watchdog.

---
 cmd/local-looper/README.md      | 2 +-
 cmd/local-looper/looper.service | 4 ++++
 cmd/local-looper/looper.sh      | 3 +++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/cmd/local-looper/README.md b/cmd/local-looper/README.md
index 2be85fb2..465876b1 100644
--- a/cmd/local-looper/README.md
+++ b/cmd/local-looper/README.md
@@ -1,6 +1,6 @@
 # DESCRIPTION
 	local looper is a process which will continually loop a pcm audio file
-	(like looper). The intended hardware for this system is a raspberry pi
+	(like looper: "av/cmd/looper/"). The intended hardware for this system is a raspberry pi
 	zero W, with a USB sound card (AUDIODEV=hw:(1,0)).
 
 # AUTHORS
diff --git a/cmd/local-looper/looper.service b/cmd/local-looper/looper.service
index 3b303097..a6d3570b 100644
--- a/cmd/local-looper/looper.service
+++ b/cmd/local-looper/looper.service
@@ -7,5 +7,9 @@ User=pi
 WorkingDirectory=/home/pi/
 ExecStart=/bin/bash /home/pi/looper.sh
 
+Type=notify
+WatchdogSec=70s
+Restart=on-failure
+
 [Install]
 WantedBy=multi-user.target
diff --git a/cmd/local-looper/looper.sh b/cmd/local-looper/looper.sh
index a800dfe7..3dbd2a71 100644
--- a/cmd/local-looper/looper.sh
+++ b/cmd/local-looper/looper.sh
@@ -1,6 +1,9 @@
 #!/bin/bash
 
+systemd-notify --ready
+
 export AUDIODEV=hw:1,0
 while true; do
   play -q -V0 -t raw -r 44.1k -e signed -b 16 -c 1 /home/pi/shrimp.pcm
+  systemd-notify --status="service is running" WATCHDOG=1
 done