Modify the reboot-required check to be more forgiving of the first few days after a package update

Oops

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) <year> <copyright holders>
+Copyright (c) 2021 Vintage Salt
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

check_reboot_required

@@ -9,7 +9,9 @@
 rr="/var/run/reboot-required"
 rrpkgs="/var/run/reboot-required.pkgs"
 # 604800 - 1 week in seconds
-threshold="${1:-604800}"
+threshold_crit="${1:-604800}"
+# 259200 - 3 days in seconds
+threshold_warn="${2:-259200}"
 if [ -f "$rr" ]; then
 	# We have a pending reboot; alert in different states depending on its age
 	lastmod=$(date +%s -r "$rr")
@@ -21,12 +23,15 @@ if [ -f "$rr" ]; then
 	if [ -z "$pkgs" ]; then
 		pkgs="(No output)"
 	fi
-	if (( now - lastmod > threshold )); then
-		echo "CRITICAL - Pending reboot older than $threshold seconds: $pkgs"
-		exit 2
-	else
-		echo "WARNING - Pending reboot: $pkgs"
+	if (( now - lastmod < threshold_warn )); then
+		echo "OK - Pending reboot: $pkgs"
+		exit 0
+	elif (( now - lastmod < threshold_crit )); then
+		echo "WARNING - Pending reboot older than $threshold_warn seconds: $pkgs"
 		exit 1
+	else
+		echo "CRITICAL - Pending reboot older than $threshold_crit seconds: $pkgs"
+		exit 2
 	fi
 else
 	# We have no pending reboots