Nagios monitoring plug-in wrapper to use check_file_age to check the newest file matching a pattern

check_pattern_file_age.sh

#!/bin/bash

#
# Check the age and size of the latest file in a particular directory matching a pattern
# e.g.
# check_download_age /the/path/to/the/directory/ 'FILE_NAME_OR_GLOB*' -c 86400 -w 43200 -C 0 -W 10000
#

cfa=/usr/lib/nagios/plugins/check_file_age

: ${1?"Must supply path"}
: ${2?"Must supply file name"}

path=${1}; shift
file_pattern=${1}; shift
file_name=$(find $path -type f -name $file_pattern -exec stat --format '%Y %n' "{}" \; | sort -nr | head -1 | cut -d' ' -f2-)

if [[ "${file_name}" != "" ]]; then
  $cfa -f "${file_name}" $*
else
  echo "FILE_AGE CRITICAL: No matching file found"
  exit 2
fi