Nagios Plugin to check file age on remote machine

You have to have a user account on the remote machine with ssh public and private key setup so that nagios user can login with our a password. The time is in seconds.

Nagios Command definition is as follows

define command{
        command_name    check_remote_fileage
        command_line    $USER1$/check_remote_fileage -H user@$HOSTADDRESS$ -f $ARG1$ -w $ARG2$ -c $ARG3$
        }

Script

#!/bin/bash
if (( $# < 8 )); then
        echo "Usage: $0 -H hostname -f remote file path -w warn -c crit"
        exit 3
fi

while getopts "H:f:w:c:" OPT; do
        case "$OPT" in
        H)      HOST=$OPTARG
                ;;
        f)      File=$OPTARG
                ;;
        w)      w=$OPTARG
                ;;
        c)      c=$OPTARG
                ;;
        \?)     echo "Error"
                exit 3;
                ;;
        esac
done

CURRTIME=$(ssh $HOST "perl -e 'print time;'")
FILETIME=$(ssh $HOST  "perl -e 'printf "%d\n", ((stat(shift))[9]);' $File")
let "DIFFTIME = CURRTIME - FILETIME"
if (( $DIFFTIME >= $w && $DIFFTIME < $c)) ; then
        echo "WARNING: $File is $DIFFTIME sec old (threshold w= $w) "
        exit 1
elif (( $DIFFTIME >= $c)) ;then
        echo "CRITICAL: $File is $DIFFTIME sec old (threshold c= $c) "
        exit 2;
else
        echo "OK: $File is with in threshold $w / $c "
        exit 0
fi