From daf7f8a8e031d23230b6dbee4f785cd39a27cfd2 Mon Sep 17 00:00:00 2001
From: Donald Buczek <buczek@molgen.mpg.de>
Date: Fri, 30 Jun 2023 07:59:07 +0200
Subject: [PATCH] Add wait-network-online.service

Add a service which waits (max 15 seconds) for the network to be
available. We define 'available' as the ability to ping our default
router by its name, which implies dns is working.

Service units, which really need network to start, should add

    After=network-online.target
    Wants=network-online.target
---
 install.sh                                     |  2 ++
 misc_systemd_units/wait-network-online.service | 14 ++++++++++++++
 2 files changed, 16 insertions(+)
 create mode 100644 misc_systemd_units/wait-network-online.service

diff --git a/install.sh b/install.sh
index 7e68250..e529f2a 100755
--- a/install.sh
+++ b/install.sh
@@ -264,6 +264,8 @@ install_symlink /etc/local/access.conf                    "$DESTDIR$sysconfdir/s
 install_data misc_etc_files/cups/client.conf              "$DESTDIR$sysconfdir/cups/client.conf"
 install_data misc_systemd_units/ip6.service               "$DESTDIR$systemdunitdir/ip6.service"
 install_data mxrouter/mxrouter.service                    "$DESTDIR$systemdunitdir/mxrouter.service"
+install_data misc_systemd_units/wait-network-online.service \
+                                                          "$DESTDIR$systemdunitdir/wait-network-online.service"
 
 postinstall
 exit
diff --git a/misc_systemd_units/wait-network-online.service b/misc_systemd_units/wait-network-online.service
new file mode 100644
index 0000000..425e7a2
--- /dev/null
+++ b/misc_systemd_units/wait-network-online.service
@@ -0,0 +1,14 @@
+[Unit]
+DefaultDependencies=no
+After=sysinit.target network.target
+Before=network-online.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=true
+TimeoutStartSec=15
+StandardOutput=null
+ExecStart=bash -c 'while ! ping -c 1 -w 1 rick.molgen.mpg.de; do sleep 1 ; done'
+
+[Install]
+WantedBy=network-online.target