From dba478652ac285e20ed5ac75c6c97b6ce5234111 Mon Sep 17 00:00:00 2001
From: "Andreas B. Mundt" <andreas.mundt@steinbeisschule-reutlingen.de>
Date: Sat, 21 Oct 2023 18:19:12 +0200
Subject: [PATCH] Wake up all clients returned by '--list-hosts'.

---
 wol-generator.sh | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100755 wol-generator.sh

diff --git a/wol-generator.sh b/wol-generator.sh
new file mode 100755
index 0000000..02ebd44
--- /dev/null
+++ b/wol-generator.sh
@@ -0,0 +1,17 @@
+#!/usr/bin/bash
+#
+# Pipe the '--list-hosts' output of ansible into this program to wake up all corresponding hosts:
+#
+# ansible-playbook [...] -i inventory/inventory.yml -l R317 --list-hosts | ./wol-generator.sh
+#
+set -eu
+
+tmpf="$(mktemp)"
+devs='devices.csv'
+
+while read -r line ; do
+    sed -nE -e "s%.*(..:..:..:..:..:..);(${line//./\\.});.*%\1  \2%p" "$devs" >> "$tmpf"
+done < <(cat - | grep -E "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+")
+
+wakeonlan -f "$tmpf"
+rm "$tmpf"