refactoring: split helper functions into smaller scripts (#2420)

target/scripts/wrapper/fail2ban-wrapper.sh

@@ -0,0 +1,31 @@
+#! /bin/bash
+
+# You cannot start fail2ban in some foreground mode and
+# it's more or less important that docker doesn't kill
+# fail2ban and its chilren if you stop the container.
+#
+# Use this script with supervisord and it will take
+# care about starting and stopping fail2ban correctly.
+#
+# supervisord config snippet for fail2ban-wrapper:
+#
+# [program:fail2ban]
+# process_name = fail2ban
+# command = /path/to/fail2ban-wrapper.sh
+# startsecs = 0
+# autorestart = false
+#
+
+trap "/usr/bin/fail2ban-client stop" SIGINT
+trap "/usr/bin/fail2ban-client stop" SIGTERM
+trap "/usr/bin/fail2ban-client reload" SIGHUP
+
+/usr/bin/fail2ban-client start
+sleep 5
+
+# wait until fail2ban is dead (triggered by trap)
+while kill -0 "$(< /var/run/fail2ban/fail2ban.pid)"
+do
+  sleep 5
+done
+