check_sentry

#!/bin/sh

# check_sentry - a nagios plugin for checking if sentry is active
# by Matt Simerson
# Dec 10, 2013 - initial writing

# INSTRUCTIONS
# install this script in your nagios libexec dir (check nrpe.cfg)
#  fetch -o /usr/local/libexec/nagios/check_sentry https://raw.githubusercontent.com/msimerson/sentry/master/check_sentry
#
# add a line like this nrpe.cfg:
#    command[check_sentry]=/usr/local/libexec/nagios/check_sentry
#
# and restart nrpe:
#    service nrpe2 restart
#
# install this script in your nagios libexec dir (check nrpe.cfg)

SENTRY_DIR=/var/db/sentry
SENTRY_BIN="$SENTRY_DIR/sentry.pl"
GREP=/usr/bin/grep

if [ ! -x $GREP ]; then
    echo "ERROR: edit check_sentry and set GREP"
    GREP=grep
fi

echoerr() { echo "$@" >&2; }
usage() {
    echo "   usage: $0"
    echo " "
    exit 3
}

$GREP -v '^#' /etc/hosts.allow | $GREP -q sentry
if [ $? -ne 0 ]; then
    echo "sentry not active in hosts.allow!"
    exit 2
fi

if [ ! -x $SENTRY_BIN ]; then
    echoerr "sentry not executable by k$USER!"
    if [ ! -d $SENTRY_DIR ]; then
        echo "sentry dir ($SENTRY_DIR) doesn't exist!"
        exit 2
    fi

    echo "OK - sentry appears installed and active"
    exit 0
fi


echo "OK - sentry installed and active"
exit 0