#!/bin/bash
#
# Init file for the ARC gridftp server
#
# chkconfig: 2345 75 25
# description: ARC gridftpd
#
# config: /etc/sysconfig/nordugrid
# config: /etc/sysconfig/gridftpd
# config: /cvmfs/dirac.egi.eu/dirac/v8.0.45/Linux-aarch64/etc/arc.conf
# config: /etc/arc.conf

### BEGIN INIT INFO
# Provides:          arc-gridftpd
# Required-Start:    $local_fs $remote_fs
# Required-Stop:     $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: ARC gridftpd
# Description:       ARC gridftp server
### END INIT INFO

# source function library
if [ -f /etc/init.d/functions ]; then
    . /etc/init.d/functions
    log_success_msg() {
	echo -n "$@"
	success "$@"
	echo
    }
    log_warning_msg() {
	echo -n "$@"
	warning "$@"
	echo
    }
    log_failure_msg() {
	echo -n "$@"
	failure "$@"
	echo
    }
elif [ -f /lib/lsb/init-functions ]; then
    . /lib/lsb/init-functions
else
    echo "Error: Cannot source neither init.d nor lsb functions"
    exit 1
fi

prog=gridftpd

# sysconfig files
if [ -r /etc/sysconfig/nordugrid ]; then
    . /etc/sysconfig/nordugrid
elif [ -r /etc/default/nordugrid ]; then
    . /etc/default/nordugrid
fi
if [ -r /etc/sysconfig/arc-${prog} ]; then
    . /etc/sysconfig/arc-${prog}
elif [ -r /etc/default/arc-${prog} ]; then
    . /etc/default/arc-${prog}
fi

# ARC_LOCATION
ARC_LOCATION=${ARC_LOCATION:-/cvmfs/dirac.egi.eu/dirac/v8.0.45/Linux-aarch64}
if [ ! -d "$ARC_LOCATION" ]; then
    log_failure_msg "ARC_LOCATION ($ARC_LOCATION) not found"
    exit 1
fi

# PID and lock file
PID_FILE=`${ARC_LOCATION}/share/arc/arc-gridftpd-start --getpidfile`
if [ $? -ne 0 ]; then
    # When --getpidfile fails it returns the error on stdout
    log_failure_msg "$PID_FILE"
    exit 1
fi

if [ `id -u` = 0 ] ; then
    # Debian does not have /run/lock/subsys
    if [ -d /run/lock/subsys ]; then
	LOCKFILE=/run/lock/subsys/$prog
    else
	LOCKFILE=/run/lock/$prog
    fi
else
    LOCKFILE=$HOME/$prog.lock
fi

start() {
    echo -n "Starting $prog: "

    # Check if we are already running
    if [ -f "$PID_FILE" ]; then
	read pid < "$PID_FILE"
	if [ "x$pid" != "x" ]; then
	    ps -p "$pid" -o comm 2>/dev/null | grep "^$prog$" 1>/dev/null 2>/dev/null
	    if [ $? -eq 0 ] ; then
		log_success_msg "already running (pid $pid)"
		return 0
	    fi
	fi
	rm -f "$PID_FILE" "$LOCKFILE"
    fi

    ${ARC_LOCATION}/share/arc/arc-gridftpd-start
    RETVAL=$?

    if [ $RETVAL -eq 0 ]; then
	touch $LOCKFILE
	log_success_msg
    else
	log_failure_msg
    fi
    return $RETVAL
}

stop() {
    echo -n "Stopping $prog: "

    if [ -f "$PID_FILE" ]; then
	read pid < "$PID_FILE"
	if [ ! -z "$pid" ] ; then
	    kill "$pid"
	    RETVAL=$?
	    if [ $RETVAL -eq 0 ]; then
		log_success_msg
	    else
		log_failure_msg
	    fi

	    sleep 1
	    kill -9 "$pid" 1>/dev/null 2>&1
	    rm -f "$PID_FILE" "$LOCKFILE"
	else
	    RETVAL=1
	    log_failure_msg "$prog shutdown - pidfile is empty"
	fi
    else
	RETVAL=0
	log_success_msg "$prog shutdown - already stopped"
    fi
    return $RETVAL
}

status() {
    if [ -f "$PID_FILE" ]; then
	read pid < "$PID_FILE"
	if [ "$pid" != "" ]; then
	    if ps -p "$pid" > /dev/null; then
		echo "$1 (pid $pid) is running..."
		return 0
	    fi
	    echo "$1 stopped but pid file exists"
	    return 1
	fi
    fi
    if [ -f $LOCKFILE ]; then
	echo "$1 stopped but lockfile exists"
	return 2
    fi
    echo "$1 is stopped"
    return 3
}

restart() {
    stop
    start
}

case "$1" in
    start)
	start
	;;
    stop)
	stop
	;;
    status)
	status $prog
	;;
    restart | force-reload)
	restart
	;;
    reload)
	;;
    condrestart | try-restart)
	[ -f $LOCKFILE ] && restart || :
	;;
    *)
	echo "Usage: $0 {start|stop|status|restart|force-reload|reload|condrestart|try-restart}"
	exit 1
	;;
esac

exit $?