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View File Name : check_dovecot_imap

#!/bin/bash
_WARN=$1
_CRIT=$2
_LIMIT_OVR=$(( $(( $3 +1 )) -1 ))

STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
STATE_DEPENDENT=4

RETVAL=${STATE_UNKNOWN}

if [ -z "$_CRIT" ]; then
    echo "Usage: $0 <WARNING_PERCENT> <CRITICAL PERCENT> [PROCESS_LIMIT]"
    exit ${STATE_UNKNOWN}
fi

if [ ${_LIMIT_OVR} -eq 0 ]; then
    _LIMIT=$( grep -A20 '[^#]*service imap {' /etc/dovecot/dovecot.conf | grep '^[^#]*process_limit' | sed 's|.*process_limit[ ]*=[ ]*\([0-9]\+\)|\1|' )  # Extrating limit from dovecot config file '
else
    _LIMIT=${_LIMIT_OVR}
fi

_PROC_USED=$( pgrep -x imap | wc -l )
_CURR_RATE=$(( ${_PROC_USED} * 100 / ${_LIMIT} ))

if [ ${_CURR_RATE} -ge ${_CRIT} ]; then
    echo "CRITICAL: ${_PROC_USED}/${_LIMIT} Processes in use!"
    RETVAL=${STATE_CRITICAL}
elif [ ${_CURR_RATE} -ge ${_WARN} ]; then
    echo "WARNING: ${_PROC_USED}/${_LIMIT} Processes in use!"
    RETVAL=${STATE_WARNING}
else
    echo "OK: ${_PROC_USED}/${_LIMIT} Processes in use"
    RETVAL=${STATE_OK}
fi
exit ${RETVAL}