Very simple and naive watchdog that alerts when the actual process quits

lib/__init__.py

@@ -35,3 +35,5 @@ config.install_attr('emails.subject_tpl',
                     '[DOMAIN] {state}: {check} on {dest}')
 # reports email subject
 config.install_attr('emails.report.subject', '[DOMAIN] Picomon error report')
+# watchdog error email subject
+config.install_attr('emails.watchdog_subject', '[DOMAIN] Picomon stopped')

picomon_watchdog.py

+import subprocess
+import config
+from lib import mails
+
+
+retcode = subprocess.call(["python3", "picomon.py"])
+
+mails.send_email(config.emails.watchdog_subject,
+                 "Picomon exited with status %s" % retcode)
+
+mails.quit()