nagios-plugins/check_reversetunnel

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#!/bin/sh
#
NAGIOS_OK=0
NAGIOS_ERROR=2
#
MULTIMEDIA_TUNNEL_REGEX="\-R 10022:localhost:22.*mount-mockery.de$"
#
AUTOSSH_PIDs=$(pidof autossh)
if [ -z $AUTOSSH_PIDs ]; then
# no autossh process running
echo "ERROR - No autossh process is running!"
exit $NAGIOS_ERROR
else
# there is an autossh process
ps x -q $AUTOSSH_PIDs | grep "$MULTIMEDIA_TUNNEL_REGEX" 2>&1 > /dev/null
if [ $? -eq 0 ]; then
echo "OK - The required autossh process is running"
exit $NAGIOS_OK
else
echo "ERROR - There are autossh processes, but none of them fit to the required connection details"
exit $NAGIOS_ERROR
fi
fi