From b01ae6630417686f4bd7022bf76a16e8d9e07bae Mon Sep 17 00:00:00 2001
From: Chl <chl-dev@bugness.org>
Date: Sat, 6 Mar 2021 18:15:14 +0100
Subject: [PATCH] nagios: file-age: add min-size

+ well needed explanation...
---
 nagios/check_file_age.sh | 52 ++++++++++++++++++++++++++++------------
 1 file changed, 37 insertions(+), 15 deletions(-)

diff --git a/nagios/check_file_age.sh b/nagios/check_file_age.sh
index b342996..5b52a13 100755
--- a/nagios/check_file_age.sh
+++ b/nagios/check_file_age.sh
@@ -8,6 +8,7 @@ RANGE_WARNING_AGE="7"
 RANGE_CRITICAL_AGE="30"
 RANGE_WARNING_FILES_NUMBER="1:"
 RANGE_CRITICAL_FILES_NUMBER="1:"
+MIN_SIZE="0c"
 FIND_BASEDIR="/"
 
 # Output
@@ -31,7 +32,7 @@ set -e
 usage() {
 	cat <<EOF
 Usage :
-  $0 [-w age_warning_limit] [-c age_critical_limit] [-W files_number_warning_range] [-C files_number_critical_range] -b find-basedir -f find-name-regexp [[-w...] -f find-name-regexp] ...
+  $0 [-w age_warning_limit] [-W files_number_warning_range] [-c age_critical_limit] [-C files_number_critical_range] [-s min_size]  -b find-basedir -f find-name-regexp [[-w...] -f find-name-regexp] ...
 
 Note: Since the file(s) are checked against the lastest ranges given, order
       of the arguments are important.
@@ -42,10 +43,20 @@ Default values:
 	files_number_warning_range :	$RANGE_WARNING_FILES_NUMBER
 	files_number_critical_range :	$RANGE_CRITICAL_FILES_NUMBER
 	find-basedir:	$FIND_BASEDIR
+	min_size: $MIN_SIZE (c/k/M/G = bytes/kibibytes/mebibytes/gibibytes. Beware of 'find' roundup, cf. man page)
 
 The check is only done on the couple crit-crit and warn-warn.
 No combination of crit/warn is made (for example, critical number of
 files at age warning range).
+
+Little example :
+Let's say you want to check that backup files are recent enough. For example :
+- you expect between 1 and 3 files modified in the last 2 days, warning alert if not,
+- you expect between 2 and 20 files modified in the last 7 days, critical alert if not.
+It gives :
+  $0 -W 1:3 -w 2 -C 2:20 -c 7 -b /var/backups -f '*.tar.gz'
+And since '-f' options are executed in sequence, you can combine several check in a single launch :
+  $0 -w 2 -W 1:5 -c 7 -C 5:10 -s 1500M -b /var/backups/client1/ -f 'sauv_*.tar.gz'  -W 5:50 -C 25:100 -s 2M -b /var/backups/client2/ -f 'sauv_mysql_*.sql.gz'
 EOF
 }
 
@@ -62,11 +73,15 @@ if ! which find >/dev/null 2>&1 ; then
 	echo "UNKNOWN 'find' not found."
 	exit 1
 fi
+if ! which tr >/dev/null 2>&1 ; then
+	echo "UNKNOWN 'tr' not found (not mandatory, remove perfdata if you wish)."
+	exit 1
+fi
 
 #
 # Gestion des paramètres
 #
-while getopts hw:c:W:C:b:f: f; do
+while getopts hw:c:W:C:s:b:f: f; do
 	case "$f" in
 		'h')
 			usage
@@ -99,6 +114,10 @@ while getopts hw:c:W:C:b:f: f; do
 			fi
 			;;
 
+		's')
+			MIN_SIZE="$OPTARG"
+			;;
+
 		'b')
 			# TODO : vérifier que le répertoire existe ?
 			FIND_BASEDIR="$OPTARG"
@@ -109,16 +128,21 @@ while getopts hw:c:W:C:b:f: f; do
 			# un buffer et de le traiter ensuite
 			FIND_NAME_REGEXP="$OPTARG"
 
-			# mémo : 'label'=value[UOM];[warn];[crit];[min];[max]
-			#OUTPUT_PERFDATA=$( printf "%s'port%d'=%d;%s;%s;0;" \
-			#		"$( test -n "$OUTPUT_PERFDATA" && echo "$OUTPUT_PERFDATA " )" \
-			#		"$PORT_NUMBER" \
-			#		"$CPT" \
-			#		"$RANGE_WARNING" \
-			#		"$RANGE_CRITICAL" )
+			FILES_NUMBER_AT_WARN_AGE="$( find "$FIND_BASEDIR" -name "$FIND_NAME_REGEXP" -type f \( -size "$MIN_SIZE" -or -size "+$MIN_SIZE" \) -mtime "-$RANGE_WARNING_AGE"  -printf "a\n" | wc -l )"
+			FILES_NUMBER_AT_CRIT_AGE="$( find "$FIND_BASEDIR" -name "$FIND_NAME_REGEXP" -type f \( -size "$MIN_SIZE" -or -size "+$MIN_SIZE" \) -mtime "-$RANGE_CRITICAL_AGE" -printf "a\n" | wc -l )"
 
-			FILES_NUMBER_AT_WARN_AGE="$( find "$FIND_BASEDIR" -name "$FIND_NAME_REGEXP" -type f -mtime "-$RANGE_WARNING_AGE"  -printf "a\n" | wc -l )"
-			FILES_NUMBER_AT_CRIT_AGE="$( find "$FIND_BASEDIR" -name "$FIND_NAME_REGEXP" -type f -mtime "-$RANGE_CRITICAL_AGE" -printf "a\n" | wc -l )"
+			# mémo : 'label'=value[UOM];[warn];[crit];[min];[max]
+			OUTPUT_PERFDATA=$( printf "%s'warn%s'=%d;%s;;0;" \
+					"$( test -n "$OUTPUT_PERFDATA" && echo "$OUTPUT_PERFDATA " )" \
+					"$( echo "$FIND_BASEDIR:$FIND_NAME_REGEXP" | LANG=C tr -cd "a-zA-Z/_.-" )" \
+					"$FILES_NUMBER_AT_WARN_AGE" \
+					"$RANGE_WARNING_FILES_NUMBER" )
+					#"$RANGE_CRITICAL_FILES_NUMBER" )
+			OUTPUT_PERFDATA=$( printf "%s'crit%s'=%d;;%s;0;" \
+					"$( test -n "$OUTPUT_PERFDATA" && echo "$OUTPUT_PERFDATA " )" \
+					"$( echo "$FIND_BASEDIR:$FIND_NAME_REGEXP" | LANG=C tr -cd "a-zA-Z/_.-" )" \
+					"$FILES_NUMBER_AT_CRIT_AGE" \
+					"$RANGE_CRITICAL_FILES_NUMBER" )  #"$RANGE_WARNING_FILES_NUMBER" \
 
 			if check_range "$FILES_NUMBER_AT_CRIT_AGE" "$RANGE_CRITICAL_FILES_NUMBER" ; then
 				OUTPUT_EXIT_STATUS=2
@@ -153,8 +177,6 @@ case "$OUTPUT_EXIT_STATUS" in
 		;;
 esac
 
-# (pas de perfdata dans ce script)
-#printf "|%s\n" "$OUTPUT_PERFDATA"
-printf "\n"
-# on supprime les retours à la ligne
+printf "|%s\n" "$OUTPUT_PERFDATA"
+
 exit $OUTPUT_EXIT_STATUS