From ad6ad946cb91ceb443798a426f958c7add3e8d67 Mon Sep 17 00:00:00 2001
From: Benjamin Renard <brenard@zionetrix.net>
Date: Wed, 21 Feb 2024 23:48:38 +0100
Subject: [PATCH] Initial version

---
 README.md | 26 ++++++++++++++++++++++++++
 check_apk | 27 +++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 README.md
 create mode 100755 check_apk

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..a3a30ff
--- /dev/null
+++ b/README.md
@@ -0,0 +1,26 @@
+# Check APK
+
+Nagios/Icinga check plugin to monitor available upgrades on Alpine Linux and its APK packages manager.
+
+## Installation
+
+```bash
+apk add wget
+mkdir -p /usr/lib/nagios/plugins
+wget -O /usr/lib/nagios/plugins/check_apk \
+  https://gitea.zionetrix.net/bn8/check_apk/raw/branch/master/check_apk
+chmod 750 /usr/lib/nagios/plugins/check_apk
+```
+
+## Copyright
+
+Copyright (c) 2024 Benjamin Renard <brenard@zionetrix.net>
+
+## License
+
+This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 3 as published by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
diff --git a/check_apk b/check_apk
new file mode 100755
index 0000000..c52af97
--- /dev/null
+++ b/check_apk
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+UPDATE=$(apk update 2>&1)
+if [ $? -ne 0 ]
+then
+	echo "UNKNOWN - Fail to update packages lists"
+	echo -e "$UNKNOWN"
+	exit 3
+fi
+
+UPGRADES=$(apk -u list 2>&1)
+if [ $? -ne 0 ]
+then
+	echo "UNKNOWN - Fail to list available upgrades"
+	echo -e "$UPGRADES"
+	exit 3
+fi
+
+if [ -z "$UPGRADES" ]
+then
+	echo "OK - System is uptodate"
+	exit 0
+fi
+
+echo "WARNING - $(echo -e "$UPGRADES"|wc -l) upgrades available"
+echo -e "$UPGRADES"
+exit 1