From e0fbdf852ee5c7cf12d70b4e1767e7fbe5eb3b41 Mon Sep 17 00:00:00 2001
From: Anthony Axenov <anthonyaxenov@gmail.com>
Date: Wed, 2 Jul 2025 13:29:40 +0800
Subject: [PATCH] duckdns

---
 tools/duckdns/.env.example |  3 +++
 tools/duckdns/.gitignore   |  1 +
 tools/duckdns/install.sh   | 22 ++++++++++++++++++++++
 tools/duckdns/uninstall.sh |  3 +++
 tools/duckdns/update.sh    | 21 +++++++++++++++++++++
 5 files changed, 50 insertions(+)
 create mode 100644 tools/duckdns/.env.example
 create mode 100644 tools/duckdns/.gitignore
 create mode 100755 tools/duckdns/install.sh
 create mode 100755 tools/duckdns/uninstall.sh
 create mode 100755 tools/duckdns/update.sh

diff --git a/tools/duckdns/.env.example b/tools/duckdns/.env.example
new file mode 100644
index 0000000..a702a0d
--- /dev/null
+++ b/tools/duckdns/.env.example
@@ -0,0 +1,3 @@
+DUCK_TOKEN=
+DUCK_DOMAINS=
+DUCK_IP=
diff --git a/tools/duckdns/.gitignore b/tools/duckdns/.gitignore
new file mode 100644
index 0000000..4c49bd7
--- /dev/null
+++ b/tools/duckdns/.gitignore
@@ -0,0 +1 @@
+.env
diff --git a/tools/duckdns/install.sh b/tools/duckdns/install.sh
new file mode 100755
index 0000000..41b9673
--- /dev/null
+++ b/tools/duckdns/install.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+# https://www.duckdns.org/install.jsp
+
+thisdir="$( dirname "$(readlink -e -- "${BASH_SOURCE[0]}")")"
+
+cp -f .env.example .env
+
+cat <<EOF | sudo tee /etc/cron.d/duckdns && crontab -u "$(whoami)" /etc/cron.d/duckdns
+# ------------- Minute (0 - 59)
+# | ----------- Hour (0 - 23)
+# | | --------- Day of month (1 - 31)
+# | | | ------- Month (1 - 12)
+# | | | | ----- Day of week (0 - 7) (Sunday=0 or 7)
+# | | | | |
+# * * * * * "command to be executed"
+
+# AAA обновление duckdns ip
+0 * * * * $thisdir/update.sh
+
+EOF
+
diff --git a/tools/duckdns/uninstall.sh b/tools/duckdns/uninstall.sh
new file mode 100755
index 0000000..7eee2ce
--- /dev/null
+++ b/tools/duckdns/uninstall.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sudo rm -f /etc/cron.d/duckdns
diff --git a/tools/duckdns/update.sh b/tools/duckdns/update.sh
new file mode 100755
index 0000000..81c41d5
--- /dev/null
+++ b/tools/duckdns/update.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+# shellcheck disable=SC1091
+
+[ ! -f .env ] && {
+    echo "ERROR: .env not exists"
+    exit 1
+}
+
+source .env
+
+[ -z "$DUCK_TOKEN" ] && {
+    echo "ERROR: env var DUCK_TOKEN not specified"
+    exit 1
+}
+
+[ -z "$DUCK_DOMAINS" ] && {
+    echo "ERROR: env var DUCK_DOMAINS not specified"
+    exit 1
+}
+
+curl -k "https://www.duckdns.org/update?domains=${DUCK_DOMAINS}&token=${DUCK_TOKEN}&ip=${DUCK_IP}"