#!/sbin/runscript
# Copyright 2003 Clement Siu-Chung Cheung (sccheung at umich dot edu)
# Distributed under the terms of the GNU General Public License v2
# available at http://www.gnu.org/copyleft/gpl.html


arla_dir=${arla_dir:-/usr/arla}
bin_dir=${bin_dir:-${arla_dir}/bin}
etc_dir=${etc_dir:-${arla_dir}/etc}
cache_dir=${cache_dir:-/var/spool/afs}


depend() {
    need net
    provide afs
}

checkconfig() {
    if [ ! -f ${etc_dir}/arla.conf ]; then
        eerror "/etc/arla/arla.conf is missing"
        return 1
    fi

    if [ ! -f ${etc_dir}/ThisCell ]; then
        eerror "/etc/arla/ThisCell is missing"
        return 1
    fi

    if [ ! -f ${etc_dir}/CellServDB ]; then
        eerror "/etc/arla/CellServDB is missing"
        return 1
    fi

    return 0
}

start() {
    checkconfig || return $?

    if lsmod|grep nnpfs > /dev/null 2>&1; then
        einfo "Arla kernel module already loaded"
    else
        ebegin "Loading Arla kernel module"
        insmod ${bin_dir}/nnpfs.o
        if [ "$?" != '0' ]; then
            eend 1 "Failed to load Arla kernel module"
            return 1
        else
            eend 0
        fi

        # Give it some time to take effect
        sleep 1
    fi

    if [ ! -r /dev/nnpfs0 ]; then
        einfo "Creating device..."
        mknod /dev/nnpfs0 c 103 0
    fi
    chmod 600 /dev/nnpfs0

    if [ ! -e ${cache_dir} ] ; then
        einfo "Creating cache directory..."
        mkdir ${cache_dir}
        chmod 700 ${cache_dir}
        chown root ${cache_dir}
    fi

    ebegin "Starting arlad"

    start-stop-daemon --start --quiet --exec ${arla_dir}/libexec/arlad

    if [ "$?" != "0" ]; then
        eend 1 "Failed to start arlad"
        return 1
    else
        eend 0
    fi

    if [ ! -r /afs ] ; then
        einfo "Creating /afs..."
        mkdir /afs
    fi

    # wait for arlad to completely start
    sleep 3

    ebegin "Mounting AFS"
    mount -t nnpfs /dev/nnpfs0 /afs
    eend $? "Failed to mount AFS"
}

stop() {
    ebegin "Unmounting AFS"
    umount /afs
    eend 0

    ebegin "Stopping arlad"
    start-stop-daemon --stop --quiet --pidfile /var/run/arlad.pid

    if [ -r /var/run/arlad.pid ]; then
        eend $? "Failed to stop arlad with PID="`cat /var/run/arlad.pid > /dev/null 2>&1`
    else
        eerror "Can't find PID file for arlad."
        eerror "arlad probably has not been started successfully or somehow died already!"
        # don't eend 1. Otherwise, the user won't be able to stop this
        # daemon when things goes wrong. If We're asked to stop it and
        # it doesn't exist, the record must be wrong. So just let is
        # succeed and reset the status back to "stoped", which is what
        # it should be.
        eend 0
    fi

    ebegin "Unoading Arla kernel module"
    rmmod nnpfs
    if [ "$?" != "0" ]; then
        # It's fine to fail. The AFS has already stopped. No need to eend 1.
        eend 1 "Failed to unload Arla kernel module"
    else
        eend 0
    fi
}