From d49b19bdc43f73ea246f9b4f0b42b8000190bb74 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gardais=20J=C3=A9r=C3=A9my?=
 <jeremy.gardais@univ-rennes1.fr>
Date: Wed, 11 Mar 2020 10:52:44 +0100
Subject: [PATCH] New function to regenerate a file if too old

---
 xymon/plugins/client/ext/smartoverall | 41 +++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/xymon/plugins/client/ext/smartoverall b/xymon/plugins/client/ext/smartoverall
index 3aa8350..7c3e00a 100755
--- a/xymon/plugins/client/ext/smartoverall
+++ b/xymon/plugins/client/ext/smartoverall
@@ -39,9 +39,50 @@ device_list="${XYMONTMP}/${MACHINEDOTS}.smartoverall.dscan"
 ## This file might be used by a more advanced script such as skazi0's one
 drivedb_list="${XYMONTMP}/${MACHINEDOTS}.smart.drivedb.list"
 
+# By default, don't empty files newer than 10hours (600 minutes)
+default_mtime_minutes="600"
 # ]]]
 
 # Functions
+## Create or empty a file if it's too old [[[
+## First argument (required): Absolut path to the file
+## Second argument (optionnal): Maximum number of minutes since last modification
+regenerate_if_too_old() {
+	## Set variables according to the number of passed arguments [[[
+	case $# in
+		0 )
+			[ "${debug}" -eq "0" ] && printf "${c_magentab}%-6b${c_reset}\n" "DEBUG : regenerate_if_too_old func − Need at least 1 argument."
+			exit 1
+			;;
+		1 )
+			_file="${1}"
+			[ "${debug}" -eq "0" ] && printf "${c_magentab}%-6b${c_reset}\n" "DEBUG : regenerate_if_too_old func − Use default_mtime_minutes value: ${default_mtime_minutes}."
+			_max_mtime_minutes="${default_mtime_minutes}"
+			;;
+		2 )
+			_file="${1}"
+			_max_mtime_minutes="${2}"
+			;;
+	esac
+	## ]]]
+	_current_timestamp=$(date "+%s")
+	_file_mtime_timestamp=$(stat --format="%Y" -- "${_file}")
+
+	## Substract last modification timestamp of the file to current timestamp
+	: $(( _file_mtime_seconds=_current_timestamp-_file_mtime_timestamp ))
+	## Get maximum allowed mtime in seconds
+	: $(( _max_mtime_seconds=_max_mtime_minutes*60 ))
+
+	## Compare last modification mtime with the maximum allowed
+	if [ "${_file_mtime_seconds}" -gt "${_max_mtime_seconds}" ]; then
+		[ "${debug}" -eq "0" ] && printf "${c_magentab}%-6b${c_reset}\n" "DEBUG : regenerate_if_too_old func − Need to empty or create ${_file} last modification happened ${_file_mtime_seconds} seconds ago (maximum is ${_max_mtime_seconds})."
+		true > "${_file}"
+	else
+		[ "${debug}" -eq "0" ] && printf "${c_magentab}%-6b${c_reset}\n" "DEBUG : regenerate_if_too_old func − Don't need to empty ${_file} last modification happened ${_file_mtime_seconds} seconds ago (maximum is ${_max_mtime_seconds})."
+	fi
+
+}
+## ]]]
 ## Test if a disk really support SMART [[[
 ## Smartctl can give an health status even without a full support
 ## of SMART for some type (eg. scsi or megaraid).