#! /bin/sh

#
# Skeleton sh script suitable for starting and stopping
# "wrapped" Java apps.
#
# Make sure that PIDFILE points to the correct location,
# if you have changed the default location set in the
# wrapper configuration file.
#
# Note that the wrapper only supports Windows, Mac, and
# certain Linux architectures. If this script fails to
# successfully invoke i2psvc on your platform,
# try the runplain.sh script instead.
#

#-----------------------------------------------------------------------------
# These settings can be modified to fit the needs of your application

# Paths
# Note that (percent)INSTALL_PATH and (percent)SYSTEM_java_io_tmpdir
# should have been replaced by the izpack installer.
# If you did not run the installer, replace them with the appropriate path.
I2P="%INSTALL_PATH"
I2PTEMP="%SYSTEM_java_io_tmpdir"
# PORTABLE installation:
# Use the following instead.
#I2PTEMP="%INSTALL_PATH"

# Application
APP_NAME="i2p"
APP_LONG_NAME="I2P Service"

# Wrapper
WRAPPER_CMD="$I2P/i2psvc"
WRAPPER_CONF="$I2P/wrapper.config"

# Priority at which to run the wrapper.  See "man nice" for valid priorities.
#  nice is only used if a priority is specified.
PRIORITY=

# Location of the pid file.
PIDDIR="$I2PTEMP"

# If uncommented, causes the Wrapper to be shutdown using an anchor file.
#  When launched with the 'start' command, it will also ignore all INT and
#  TERM signals.
#IGNORE_SIGNALS=true

# If specified, the Wrapper will be run as the specified user when the 'start'
#  command is passed to this script.  When running with the 'console' command
#  the current user will be used.
# IMPORTANT - Make sure that the user has the required privileges to write
#  the PID file and wrapper.log files.  Failure to be able to write the log
#  file will cause the Wrapper to exit without any way to write out an error
#  message.
# NOTE - This will set the user which is used to run the Wrapper as well as
#  the JVM and is not useful in situations where a privileged resource or
#  port needs to be allocated prior to the user being changed.
#RUN_AS_USER=

# Do not modify anything beyond this point
#-----------------------------------------------------------------------------

# Process ID
ANCHORFILE="$PIDDIR/$APP_NAME.anchor"
PIDFILE="$PIDDIR/$APP_NAME.pid"
pid=""

# Resolve the location of the 'ps' command
PSEXE="/usr/bin/ps"
if [ ! -x $PSEXE ]
then
    PSEXE="/bin/ps"
    if [ ! -x $PSEXE ]
    then
        echo "Unable to locate 'ps'."
        echo "Please report this with the location on your system."
        exit 1
    fi
fi

# Build the nice clause
if [ "X$PRIORITY" = "X" ]
then
    CMDNICE=""
else
    CMDNICE="nice -$PRIORITY"
fi

# Check the configured user
if [ "X$RUN_AS_USER" != "X" ]
then
    if [ "`id -u -n`" = "$RUN_AS_USER" ]
    then
        # Already running as the configured user.  Avoid password prompts by not calling su.
        RUN_AS_USER=""
    fi
fi

getpid() {
    if [ -f $PIDFILE ]
    then
        if [ -r $PIDFILE ]
        then
            pid=`cat $PIDFILE`
            if [ "X$pid" != "X" ]
            then
                # Verify that a process with this pid is still running.
                pid=`$PSEXE -p $pid | grep $pid | grep -v grep | awk '{print $1}' | tail -n 1`
                if [ "X$pid" = "X" ]
                then
                    # This is a stale pid file.
                    rm -f $PIDFILE
                    echo "Removed stale pid file: $PIDFILE"
                fi
            fi
        else
            echo "Cannot read $PIDFILE."
            exit 1
        fi
    fi
}

testpid() {
    pid=`$PSEXE -p $pid | grep $pid | grep -v grep | awk '{print $1}' | tail -n 1`
    if [ "X$pid" = "X" ]
    then
        # Process is gone so remove the pid file.
        rm -f $PIDFILE
    fi
}

console() {
    echo "Running $APP_LONG_NAME..."
    getpid
    if [ "X$pid" = "X" ]
    then
        if [ "X$IGNORE_SIGNALS" = "X" ]
        then
            exec $CMDNICE $WRAPPER_CMD $WRAPPER_CONF i2psvc.pidfile=$PIDFILE
        else
            exec $CMDNICE $WRAPPER_CMD $WRAPPER_CONF i2psvc.pidfile=$PIDFILE wrapper.anchorfile=$ANCHORFILE
        fi
    else
        echo "$APP_LONG_NAME is already running."
        exit 1
    fi
}

start() {
    echo "Starting $APP_LONG_NAME..."
    getpid
    if [ "X$pid" = "X" ]
    then
        if [ "X$IGNORE_SIGNALS" = "X" ]
        then
            if [ "X$RUN_AS_USER" = "X" ]
            then
                exec $CMDNICE $WRAPPER_CMD $WRAPPER_CONF i2psvc.pidfile=$PIDFILE wrapper.daemonize=TRUE
            else
                su -m $RUN_AS_USER -c "exec $CMDNICE $WRAPPER_CMD $WRAPPER_CONF i2psvc.pidfile=$PIDFILE wrapper.daemonize=TRUE"
            fi
        else
            if [ "X$RUN_AS_USER" = "X" ]
            then
                exec $CMDNICE $WRAPPER_CMD $WRAPPER_CONF i2psvc.pidfile=$PIDFILE wrapper.anchorfile=$ANCHORFILE wrapper.ignore_signals=TRUE wrapper.daemonize=TRUE
            else
                su -m $RUN_AS_USER -c "exec $CMDNICE $WRAPPER_CMD $WRAPPER_CONF i2psvc.pidfile=$PIDFILE wrapper.anchorfile=$ANCHORFILE wrapper.ignore_signals=TRUE wrapper.daemonize=TRUE"
            fi
        fi
    else
        echo "$APP_LONG_NAME is already running."
        exit 1
    fi
}

stopit() {
    echo "Stopping $APP_LONG_NAME..."
    getpid
    if [ "X$pid" = "X" ]
    then
        echo "$APP_LONG_NAME was not running."
    else
        if [ "X$IGNORE_SIGNALS" = "X" ]
        then
            # Running so try to stop it.
            kill $pid
            if [ $? -ne 0 ]
            then
                # An explanation for the failure should have been given
                echo "Unable to stop $APP_LONG_NAME."
                exit 1
            fi
        else
            rm -f $ANCHORFILE
            if [ -f $ANCHORFILE ]
            then
                # An explanation for the failure should have been given
                echo "Unable to stop $APP_LONG_NAME."
                exit 1
            fi
        fi

        # We can not predict how long it will take for the wrapper to
        #  actually stop as it depends on settings in wrapper.conf.
        #  Loop until it does.
        savepid=$pid
        CNT=0
        TOTCNT=0
        while [ "X$pid" != "X" ]
        do
            # Loop for up to 5 minutes
            if [ "$TOTCNT" -lt "300" ]
            then
                if [ "$CNT" -lt "5" ]
                then
                    CNT=`expr $CNT + 1`
                else
                    echo "Waiting for $APP_LONG_NAME to exit..."
                    CNT=0
                fi
                TOTCNT=`expr $TOTCNT + 1`

                sleep 1

                testpid
            else
                pid=
            fi
        done

        pid=$savepid
        testpid
        if [ "X$pid" != "X" ]
        then
            echo "Timed out waiting for $APP_LONG_NAME to exit."
            echo "  Attempting a forced exit..."
            kill -9 $pid
        fi

        pid=$savepid
        testpid
        if [ "X$pid" != "X" ]
        then
            echo "Failed to stop $APP_LONG_NAME."
            exit 1
        else
            echo "Stopped $APP_LONG_NAME."
        fi
    fi
}

status() {
    getpid
    if [ "X$pid" = "X" ]
    then
        echo "$APP_LONG_NAME is not running."
        exit 1
    else
        echo "$APP_LONG_NAME is running ($pid)."
        exit 0
    fi
}

dump() {
    echo "Dumping $APP_LONG_NAME..."
    getpid
    if [ "X$pid" = "X" ]
    then
        echo "$APP_LONG_NAME was not running."

    else
        kill -3 $pid

        if [ $? -ne 0 ]
        then
            echo "Failed to dump $APP_LONG_NAME."
            exit 1
        else
            echo "Dumped $APP_LONG_NAME."
        fi
    fi
}

case "$1" in

    'console')
        console
        ;;

    'start')
        start
        ;;

    'stop')
        stopit
        ;;

    'restart')
        stopit
        start
        ;;

    'status')
        status
        ;;

    'dump')
        dump
        ;;

    *)
        echo "Usage: $0 { console | start | stop | restart | status | dump }"
        exit 1
        ;;
esac

exit 0