Bash - Autoshutdown Script

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### /user/local/sbin/checkshutdown.sh:


#!/bin/bash
#
#set -x

. /etc/autoshutdown.conf

logit()
{
    logger -p local0.notice -s -- AutoShutdown: $*
}

shutdown()
{
        ### commands before shutdown

        /home/minecraft/start-gohocraft-network.sh stop
        # Old cmd
        # /sbin/halt
        # my new shutdown cmd
        /sbin/shutdown -h 1
        # end of it :)

}

IsOnline()
{
        for i in $*; do
        ping $i -c1
        if [ "$?" == "0" ]; then
          logit PC $i is still active, auto shutdown terminated
          return 1
        fi
        done

    return 0
}

IsRunning()
{
        for i in $*; do
        if [ `pgrep -c $i` -gt 0 ] ; then
          logit $i still active, auto shutdown terminated
                  return 1
                fi
        done

        return 0
}

IsDamonActive()
{
        for i in $*; do
                if [ `pgrep -c $i` -gt 2 ] ; then
                  logit $i still active, auto shutdown terminated
                  return 1
                fi
        done

        return 0
}

IsPortInUse()
{
        for i in $*; do
                LANG=C netstat -an | grep -q "${myIp}:${i}.*ESTABLISHED$"
                Err=${?}
                if [ ${Err} -eq 0 ] ; then
                  logit "Port ${i} is still in use, auto shutdown terminated"
                  return 1
                fi
        done

        return 0
}

IsBusy()
{
    # Samba
    if [ "x$SAMBANETWORK" != "x" ]; then
        if [ `/usr/bin/smbstatus -b | grep $SAMBANETWORK | wc -l ` != "0" ]; then
          logit samba connected, auto shutdown terminated
          return 1
        fi
    fi

    #damons that always have one process running
    IsDamonActive $DAMONS
        if [ "$?" == "1" ]; then
                return 1
        fi

    #backuppc, wget, wsus, ....
        IsRunning $APPLICATIONS
    if [ "$?" == "1" ]; then
                return 1
        fi

        # check network-ports
        if [ "x${NETWORKPORTS}" != "x" ]; then
                myIp=$(LANG=C /sbin/ifconfig | sed -n "/inet addr/ { s|^[a-z ]*:\([0-9\.]*\).*$|\1|p }" | head -n 1)
                IsPortInUse ${NETWORKPORTS}
                if [ "$?" == "1" ]; then
                        return 1
                fi
        fi

    # Read logged users
    USERCOUNT=`who | wc -l`;
    # No Shutdown if there are any users logged in
    test $USERCOUNT -gt 0 && { logit some users still connected, auto shutdown terminated; return 1; }

        IsOnline $CLIENTS
        if [ "$?" == "1" ]; then
                return 1
        fi

    return 0
}

COUNTFILE="/var/spool/shutdown_counter"
OFFFILE="/var/spool/shutdown_off"

# turns off the auto shutdown
if [ -e $OFFFILE ]; then
    logit auto shutdown is turned off by existents of $OFFFILE
    exit 0
fi

if [ "$AUTO_SHUTDOWN" = "true" ] || [ "$AUTO_SHUTDOWN" = "yes" ] ; then
    IsBusy
    if [ "$?" == "0" ]; then
        # was it not busy already last time? Then shutdown.
        if [ -e $COUNTFILE ]; then
                # shutdown
                rm -f $COUNTFILE
                logit auto shutdown caused by cron
                shutdown
                exit 0
        else
            # shut down next time
            touch $COUNTFILE
            logit marked for shutdown in next try
            exit 0
        fi
    else
        rm -f $COUNTFILE
        #logit aborted
        exit 0
    fi
fi

logit malfunction
exit 1

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### /etc/autoshutdown.conf:


# Turn on auto shutdown
AUTO_SHUTDOWN=yes

# Damons that always have one process running, only if more that one process is active we prevent the shutdown
# The values are used with grep, so just a unique portion is sufficient
DAMONS="rsync BackupPC_ mdadm smbd"

# Important applications that shall prevent the shutdown
# The values are used with grep, so just a unique portion is sufficient
APPLICATIONS="BackupPC_nightly BackupPC_dump wsus wget mlnet 7z apt-get"

# Network IP range for checking any open samba connections
# The value is used with grep, so just a unique portion is sufficient
SAMBANETWORK="192.168.1."

# Names or IP for computers that shall prevent the shutdown
# We ping these computers in the list to check whether they are active.
CLIENTS="192.168.0.210 192.168.0.218"

# List of ports
# we check all of them, if there in use
NETWORKPORTS="22 10000 25577 32400"