Startup script linux

#! /bin/sh
### BEGIN INIT INFO
# Provides:          OpenSim
# Required-Start:    $local_fs $network 
# Required-Stop:     $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Tedds OpenSim init.d-script
### END INIT INFO

# Put script in /etc/init.d/
# then execute: update-rc.d opensim defaults

set -e

#
# Directories
#
# Location of OpenSim installation
DIR=/home/opensim/OpenSim/bin/
# Different PID dir?
PIDDIR=$DIR

USER=opensim
SERVICES="OpenSim.Grid.UserServer.exe OpenSim.Server.exe OpenSim.exe"

#
# Kill values (in seconds)
#
# How long between each service being started
DELAY_STARTUP=10
# How long between each service is sent shutdown command
DELAY_KILL=10
# After shutdown has been sent to all we do another loop with "kill", then "kill -9". How long between "kill" and "kill -9".
DELAY_FORCEKILL=10

#
# Info on service handled by this script
#
# Name of service
NAME=opensim
# Description of service
DESC="OpenSim Server"

# Binaries
SCREEN=/usr/bin/screen
MONO=/usr/bin/mono

###########################
##### START OF SCRIPT #####
###########################

export PATH="${PATH:+$PATH:}/usr/sbin:/sbin"

# Load LSB log functions
_lsbFile=""
if [ -e /etc/debian_version ]; then
    _lsbFile="/lib/lsb/init-functions"
    if [ -f $_lsbFile ]; then
        . $_lsbFile
    else
        echo This script requires LSB init-functions file which doesn't exist: $_lsbFile
        exit 1
    fi
else
# [ -e /etc/init.d/functions ] ; then
    _lsbFile="/etc/init.d/functions"
    if [ -e $_lsbFile ]; then
        . $_lsbFile
    else
        echo This script requires LSB init-functions file which doesn't exist: $_lsbFile
        exit 1
    fi
fi

# Lets use fancy output
log_use_fancy_output

# Check that target directory exists
if test ! -d "$DIR"; then
    log_failure_msg "$NAME" "Target directory \"$DIR\" does not exist. Can not continue."
    exit 1
fi

# Create a reverse order for shutdown
SERVICES_REVERSE=""
reverse() { SERVICES_REVERSE="$9 $8 $7 $6 $5 $4 $3 $2 $1"; }
reverse $SERVICES

# Check if a service is running
isrunning() { 
    ISRUNNING="0"
    # Do we have PID-file?
    if [ -f "$PIDDIR/$1.pid" ]; then
        # Check if proc is running
        pid=`cat "$PIDDIR/$1.pid" 2> /dev/null`
        if [ "$pid" != "" ]; then
            if [ -d /proc/$pid ]; then
                # Process is running
                ISRUNNING="1"
            fi
        fi
    fi
    #ISRUNNING="0"
}

#
# Process commands
#
case "$1" in
start)
    # Start all services one by one
    for server in $SERVICES; do
        log_daemon_msg "Starting $NAME" "$server"

        isrunning $server
        case "$ISRUNNING" in
            1) log_progress_msg "Process already started. Please stop first"; log_end_msg 1 ;;
            0) 
                # Process is not running
                # Start process and sleep...
                exefile="/tmp/exe.OpenSim.$server.sh"

                # Need to make external file, had big problems with screen params
                echo \#\!/bin/bash > $exefile
                echo cd $DIR >> $exefile
                echo $MONO $server >> $exefile
                chmod +x $exefile

                cmd_screen="screen -S $server -d -m $exefile"
                start-stop-daemon --start -b -x /bin/su -m --pidfile=/tmp/su.$server.pid --chdir "$DIR" -- - $USER "-c $cmd_screen"

                # Delay between services that are started
                sleep $DELAY_STARTUP

                rm $exefile 2> /dev/null

                # Make PID-file
                ps afxu | grep "mono $server" | grep -iEv "grep|screen" | awk {'print $2'} > "$PIDDIR/$server.pid"

                isrunning $server
                case "$ISRUNNING" in
                    1) 
                        # Process started ok
                        #log_progress_msg "Success"; 
                        log_end_msg 0 
                        ;;
                    0) 
                        # Process didn't start... remove pid-file
                        rm "$PIDDIR/$server.pid" 2> /dev/null
                        #log_progress_msg "Failure"; 
                        log_end_msg 1 
                        ;;
                esac
                ;;
        esac

    done
    ;;

stop)
    _killCount=0

    for server in $SERVICES_REVERSE; do
        log_daemon_msg "Stopping $NAME" "$server"

        isrunning $server
        case "$ISRUNNING" in
        1) 
            _killCount=`expr $_killCount + 1`
            log_progress_msg "Sending shutdown command:"; 

            # We add some backspaces to the command in case something is on the console already
            echo `screen -S $server -X stuff \"                             

            # Wait for it to shut down...
            sleep $DELAY_KILL

            isrunning $server
            case "$ISRUNNING" in
                1) log_progress_msg "is still running."; log_end_msg 0 ;;
                0) log_progress_msg "has been shutdown"; log_end_msg 0 ;;
            esac

            ;;
        0) 
            log_progress_msg "is not running"; log_end_msg 0
            ;;
        esac

    done

    # Check if any procs are still running
    for server in $SERVICES; do
        isrunning $server
        case "$ISRUNNING" in
        1) 
            log_warning_msg "Stopping $NAME" "$server is still running: Forcing kill"
            echo `kill $pid 2> /dev/null`;
            sleep $DELAY_FORCEKILL
            echo `kill -9 $pid 2> /dev/null`;
            sleep 1

            # Now check again if it is still running...
            isrunning $server
            case "$ISRUNNING" in
                0) log_progress_msg "Success"; log_end_msg 0 ;;
                1) log_progress_msg "Process is still running... Even after \"kill -9 $pid\". WOW..."; log_end_msg 0 ;;
            esac
            ;;
        0) 
            #log_progress_msg ""; 
            ;;
        esac
    done

    log_begin_msg "$NAME: All done (killed $_killCount procs)"; log_end_msg 0

    ;;

status)
    # Count how many processes we need
    PROCCOUNT=0
    for i in $SERVICES; do
        PROCCOUNT=`expr $PROCCOUNT + 1`
    done

    # Go through server PID files and count how many are running
    log_begin_msg "$NAME: Running processed:"
    _pidCount=0
    for server in $SERVICES; do

        isrunning $server
        case "$ISRUNNING" in
            1) 
                # This server is running
                _pidCount=`expr $_pidCount + 1`
                log_progress_msg "$server"
                ;;
            0) 
                ;;
        esac
    done

    log_begin_msg " ($_pidCount of $PROCCOUNT processes are running)"; log_end_msg 0
  
    # Check if running proc count matches requires proc count
    log_begin_msg "$NAME is"
    if [ $_pidCount -eq $PROCCOUNT ]; then
        log_progress_msg "running"; log_end_msg 0
        exit 0
    else
        log_progress_msg "NOT running"; log_end_msg 0
        exit 1
    fi
    ;;

restart)
    $0 stop
    $0 start
    ;;
*)
    echo "Usage: /etc/init.d/$NAME {start|stop|restart|status}" >&2
    exit 1
    ;;
esac

exit 0