#!/bin/bash
#set -x

########################################################################
#
# Authors: Vincenzo Ciaschini - Vincenzo.Ciaschini@cnaf.infn.it 
#
# Copyright (c) Members of the EGEE Collaboration. 2004-2010.
# See http://www.eu-egee.org/partners/ for details on the copyright holders.
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Parts of this code may be based upon or even include verbatim pieces,
# originally written by other people, in which case the original header
# follows.
#
########################################################################
#
# voms	This shell script takes care of starting and stopping
#	voms servers.
#
# chkconfig: - 95 05
# description: Virtual Organization Membership Service
# processname: voms
# pidfile: /var/run/voms.pid
#
### BEGIN INIT INFO
# Provides:          voms
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Stop:      0 1 2 3 4 5 6
# Short-Description: Virtual Organization Membership Service
# Description:       Virtual Organization Membership Service
### END INIT INFO

etcpath=/etc

# Source an auxiliary profile file if we have one and pick up VOMS_USER and RUN
if [ -r ${etcpath}/default/voms ] ; then
    . ${etcpath}/default/voms
fi
if [ -r ${etcpath}/sysconfig/voms ] ; then
    . ${etcpath}/sysconfig/voms
fi

# Default prefix
VOMS_LOCATION=/usr
VOMS_LOCATION_VAR=/var

RUN=yes

# check whether $VOMS_LOCATION_VAR/lock/subsys exists
if ! test -d $VOMS_LOCATION_VAR/lock/subsys ; then
    mkdir -p $VOMS_LOCATION_VAR/lock/subsys
fi

# Default path
basepath=$VOMS_LOCATION
binpath=/usr/sbin

# Don't run until configuration is done
if [ "x$RUN" != "xyes" ] ; then
    echo "voms disabled, please adjust the configuration to your needs "
    echo "and then set RUN to 'yes' in /etc/default/voms to enable it."
    exit 0
fi

voms=${binpath}/voms
if !(test -x ${voms}) ; then
    echo "Cannot find voms."
    exit 0
fi

RETVAL=0

function start() {
    RETGLOB=0
    # Start daemons.
    prog=`basename ${voms}`
    if test -z $1; then
        vos=`ls ${etcpath}/voms`
        if test -z "$vos" ; then
            echo "No VOMS servers configured."
            return 0
        fi
    else
        vos=$1
    fi

    for vo in $vos ; do

        if test -f ${etcpath}/voms/$vo/voms.conf ; then
            echo -n "Starting $prog($vo): "

            if test -f ${etcpath}/voms/$vo/tnsnames.ora ; then
                tnsvalue=${etcpath}/voms/$vo
            else
                tnsvalue="$TNS_ADMIN"
            fi

            if [ -f $VOMS_LOCATION_VAR/lock/subsys/voms.$vo ]; then
                read pid < $VOMS_LOCATION_VAR/lock/subsys/voms.$vo
                if test "x$pid" != "x"; then
                    checkpid $pid
                    value=$?
                    if test $value -eq 0; then
                        echo "VOMS ($pid) is already running"
                        continue;
                    fi

                    if test $value -eq 2; then
                        echo "lock file $VOMS_LOCATION_VAR/lock/subsys/voms.$vo seems to be stale"
                        echo "it points to a process which does not seem to be a voms server."
                        echo "If you are certain that this is the case, remove it and restart voms again."
                        continue;
                    fi
                fi
            fi

            if [ -n "$VOMS_USER" ]; then
                su -c "TNS_ADMIN=\"$tnsvalue\" ${voms} --conf ${etcpath}/voms/$vo/voms.conf" -s /bin/bash $VOMS_USER
            else
                TNS_ADMIN="$tnsvalue" ${voms} --conf ${etcpath}/voms/$vo/voms.conf
            fi

            # get process id
            pid=$(ps axo pid,args | grep "${voms} --conf ${etcpath}/voms/$vo/voms.conf" | grep -v grep | cut -f 1 -d '/'|head -1)
            pids=`ps -efww | grep "${voms} --conf ${etcpath}/voms/$vo/voms.conf" | grep -v grep | awk '{ print $2; }'`
            NUM=$(($pid))
            if test $NUM -eq 0; then
                RETVAL=1
            else
                RETVAL=0
            fi
            [ $RETVAL -eq 0 ] && echo $pid > $VOMS_LOCATION_VAR/lock/subsys/voms.$vo
            if test $RETVAL -ne 0; then
                RETGLOB=$(($RETGLOB + 1 ))
            fi
            [ "$RETVAL" -eq 0 ] && success || failure 
            echo
        fi
    done
    
    return $RETGLOB
}

if [ -r /etc/init.d/functions ] ; then
    . /etc/init.d/functions
else

success()
{
    echo $1
    
    RES_COL=60
    echo -en "\\033[${RES_COL}G"
    echo -n "[  "
    echo -en "\\033[1;32m"
    echo -n OK
    echo -en "\\033[0;39m"
    echo -n "  ]"
    echo -ne "\r"
    echo
    
    return 0
}

failure()
{
    rc=$?
    echo $1

    RES_COL=60
    echo -en "\\033[${RES_COL}G"
    echo -n "["
    echo -en "\\033[1;31m"
    echo -n FAILED
    echo -en "\\033[0;39m"
    echo -n "]"
    echo -ne "\r"
    echo

    return $rc
}

fi

checkpid() 
{
    ps --pid $1 >> /dev/null
    if [ $? == 0 ]; then

        ps --pid $1 | grep voms >>/dev/null
        if [ $? == 0 ]; then 
            #pid file is current. The Process is a VOMS
            return 0
        else
            #pid file is stale.  The Process running is not a voms.
            return 2
        fi
    else
        #pid file is stale.  The Process does not exist anymore.
        return 1
    fi
}

# A function to stop a program.
killprocs() {
    RC=0
    # Test syntax.
    if [ "$#" -eq 0 ]; then
        echo $"Usage: killproc {pids} [signal]"
        return 1
    fi
    
    notset=0
    # check for second arg to be kill level
    if [ "$2" != "" ] ; then
        killlevel=$2
    else
        notset=1
        killlevel="-9"
    fi

    # Find pid.
    pid=$1

    # Kill it.
    if [ -n "${pid:-}" ] ; then
        [ "$BOOTUP" = "verbose" -a -z "$LSB" ] && echo -n "$base "
        if [ "$notset" -eq "1" ] ; then
            if checkpid $pid 2>&1; then
                # TERM first, then KILL if not dead
                kill -TERM $pid
                sleep 0.1
                if checkpid $pid && sleep 1 &&
                    checkpid $pid && sleep 3 &&
                    checkpid $pid ; then
                    kill -KILL $pid
                    sleep 0.1
                fi
            fi
            checkpid $pid
            RC=$?
            [ "$RC" -eq 0 ] && failure $"$base shutdown" || success $"$base shutdown"
            RC=$((! $RC))
        else
            # use specified level only
            if checkpid $pid >/dev/null 2>&1; then
                kill $killlevel $pid
                RC=$?
                [ "$RC" -eq 0 ] && success $"$base $killlevel" || failure $"$base $killlevel"
            fi
        fi
    else
        failure $"$base shutdown"
        RC=1
    fi
    
    # Remove pid file if any.
    if [ "$notset" = "1" ]; then
        rm -f /var/run/$base.pid
    fi
    return $RC
}

function stop() {
    RETGLOB=0
    # Stop daemons.
    prog=`basename ${voms}`
    if test -z $1; then
        vos=`ls ${etcpath}/voms`
        if test -z "$vos" ; then
            echo "No VOMS servers configured."
            return 0
        fi
    else
        vos=$1
    fi

    for vo in $vos ; do
        if test -f ${etcpath}/voms/$vo/voms.conf ; then
            echo -n "Stopping $prog($vo): "
            pids=`ps -efww | grep "${voms} --conf ${etcpath}/voms/$vo/voms.conf" | grep -v grep | awk '{ print $2; }'`
            dbname=`grep dbname ${etcpath}/voms/$vo/voms.conf | awk -F"=" '{ print $2; }'`
            username=`grep username ${etcpath}/voms/$vo/voms.conf | awk -F"=" '{ print $2; }'`
            if test "x$username" = "x"; then
                pids="";
                pids2="";
            else 
                pids2=`ps -efww | grep middleman$dbname | grep $username | grep -v grep | awk '{ print $2; }'`
            fi
            if test "x$pids2" != "x"; then
                kill -TERM $pids2
                usleep 100000
                if checkpid $pids2 && sleep 1 &&
                    checkpid $pids2 && sleep 3 &&
                    checkpid $pids2 ; then
                    kill -KILL $pids2
                    usleep 100000
                fi
            fi
            if test -z "$pids"; then
                echo "(already stopped)"
                continue
            fi
            for pid in $pids; do
                killprocs ${pid}
            done
            RETVAL=$?
            echo
            [ $RETVAL -eq 0 ] && rm -f $VOMS_LOCATION_VAR/lock/subsys/voms.$vo
            RETGLOB=$((RETGLOB + RETVAL))
        fi
    done
    
    return $RETGLOB
}

function condrestart() {
    RETGLOB=0
    # Conditionally restart daemons.
    prog=`basename ${voms}`
    if test -z $1; then
        vos=`ls ${etcpath}/voms`
        if test -z "$vos" ; then
            echo "No VOMS servers configured."
            return 0
        fi
    else
        vos=$1
    fi
    
    for vo in $vos ; do
        if test -f ${etcpath}/voms/$vo/voms.conf ; then
            pids=`ps -efww | grep "${voms} --conf ${etcpath}/voms/$vo/voms.conf" | grep -v grep | awk '{ print $2; }'`
            if test -n "$pids"; then
                $0 restart $vo
                RETVAL=$?
                RETGLOB=$((RETGLOB + RETVAL))
            fi
        fi
    done

    return $RETGLOB
}

function getstatus() {
    value=0
    # Get status.
    prog=`basename ${voms}`
    if test -z $1; then
        vos=`ls ${etcpath}/voms`
        if test -z "$vos" ; then
            echo "No VOMS servers configured."
            return 0
        fi
    else
        vos=$1
    fi

    for vo in $vos ; do
        if test -f ${etcpath}/voms/$vo/voms.conf ; then
            echo -n "Status $prog($vo): "
            pids=`ps -efww | grep "${voms} --conf ${etcpath}/voms/$vo/voms.conf" | grep -v grep | awk '{ print $2; }'`
            if test -z "$pids"; then
                if [ -f $VOMS_LOCATION_VAR/lock/subsys/voms.$vo ]; then
                    echo "dead but subsys locked"
                    value=$[$value < 2 ? 2 : $value]
                    continue
                fi
                echo "stopped"
                value=$[$value < 3 ? 3 : $value]
                continue
            else
                echo -n "(pid $pids) is running..." | tr '\n' ' '
                echo
                value=$[$value < 0 ? 0 : $value]
                continue
            fi
        fi
    done

    return $value
}

function reload() {
    RETGLOB=0
    # Stop daemons.
    prog=`basename ${voms}`
    if test -z $1; then
        vos=`ls ${etcpath}/voms`
    else
        vos=$1
    fi

    for vo in $vos ; do
        if test -f ${etcpath}/voms/$vo/voms.conf ; then
            echo -n "Reload $prog($vo): "
            pids=`ps -efww | grep "${voms} --conf ${etcpath}/voms/$vo/voms.conf" | grep -v grep | awk '{ print $2; }'`
	    if test -z "$pids"; then
		failure; echo
		RETVAL=1
		continue
	    else
		kill -HUP $pids
	    fi
	    RETVAL=$?
            RETGLOB=$((RETGLOB + RETVAL))
	fi
    done

    return $RETGLOB
}


# See how we were called.
case "$1" in
    start)
        start $2
        RETVAL=$?
        ;;
    stop)
        stop $2
        RETVAL=$?
        ;;
    status)
        getstatus $2
        RETVAL=$?
        ;;
    restart | force-reload)
        stop $2
        start $2
        RETVAL=$?
        ;;
    condrestart | try-restart)
        condrestart $2
        RETVAL=$?
        ;;
    reload)
	      reload $2
	      RETVAL=$?
	      ;;
    *)
        echo $"Usage: $0 {start|stop|restart|status|condrestart} [VO]"
        RETVAL=1
esac

exit $RETVAL