source: trunk/minix/etc/usr/rc@ 21

# /usr/etc/rc - continued system initialization.

RANDOM_FILE=/usr/adm/random.dat
LOCAL_FILE=/usr/etc/rc.local

case "$#:$1" in
1:start|1:stop|1:down)
    action=$1
    ;;
*)  echo >&2 "Usage: $0 start|stop|down"
    exit 1
esac

if [ -f "$LOCAL_FILE" ]
then    . "$LOCAL_FILE" $1
fi

disabled()
{
    ifs="$IFS"; IFS=,
    for skip in `sysenv disable`
    do 
        if [ "$skip" = "$1" ]
        then     
                IFS="$ifs"; unset ifs
                return 0
        fi
    done
    IFS="$ifs"; unset ifs
    return 1
}

daemonize()
{
    # Function to start a daemon, if it exists.
    local IFS=':'
    local name="$1"
    test "$1" = tcpd && name="$2"

    for dir in $PATH
    do
        if [ -f "$dir/$1" ]
        then

            # check if this service is disabled at the boot monitor.
            if disabled $name; then return; fi

            echo -n " $name"
            "$@" &
            return
        fi
    done
}

up()
{
    service=$1
    shift

    # Function to dynamically start a system service

    # First check if this service is disabled at the boot monitor.
    if disabled $service; then return; fi

    # Service is not disabled. Try to bring it up.
    echo -n " $service"
    service up /usr/sbin/$service "$@" 
}


DAEMONS=/etc/rc.daemons

case $action in
start)
    # Select console font.
    test -f /etc/font && loadfont /etc/font </dev/console

    # Cleanup.
    rm -rf /tmp/. /usr/run/. /usr/spool/lpd/. /usr/spool/locks/.

    # Start servers and drivers set at the boot monitor.
    echo -n "Starting services:"
    up random -dev /dev/random -period 3HZ

    # load random number generator
    if [ -f $RANDOM_FILE ]
    then
        cat < $RANDOM_FILE >/dev/random
        # overwrite $RANDOM_FILE. We don't want to use this data again
        dd if=/dev/random of=$RANDOM_FILE bs=1024 count=1 2> /dev/null
    fi

    # start only network drivers that are in use
    for driver in lance rtl8139 fxp dpeth dp8390
    do
        if grep " $driver " /etc/inet.conf > /dev/null  2>&1
        then 
            eval arg=\$${driver}_arg
            if [ ! -z "$arg" ]; then arg="-args \"$arg\""; fi
            eval up $driver $arg -period 5HZ
        fi
    done
    up inet 
    up printer -dev /dev/lp -period 10HZ
    echo .

    # Network initialization.
    (: </dev/tcp) 2>/dev/null && net=t  # Is there a TCP/IP server?

    echo -n "Starting daemons:"
    daemonize update

    # Ugly error message when starting cron from CD.
    # (and cron unnecessary then so..)
    if [ ! -f /CD ]
    then        daemonize cron
    else        mkdir /tmp/log
                rm -f /var/log || true
                ln -s /tmp/log /var/log || true
                . /etc/rc.cd
    fi
    # syslogd has not been started yet
    rm -f /var/run/syslogd.pid
    daemonize syslogd
    echo .

    if [ "$net" ]
    then
        if [ -f /etc/rc.net ]
        then
            # Let a customized TCP/IP initialization script figure it out.
            . /etc/rc.net
        else
            # Standard network daemons.
            echo -n "Starting networking:"
            if grep -s 'psip0.*default' /etc/inet.conf 
            then        ifconfig -h 10.0.0.1
            else        daemonize dhcpd
            fi
            daemonize nonamed -L
            if [ -f "$DAEMONS" ]
            then        . "$DAEMONS"
            fi
            # The last daemon has been started, so close the list:
            echo .
        fi
    fi

    if [ "$net" ]
    then
        # Get the nodename from the DNS and set it.
        trap '' 2
        intr -t 20 hostaddr -h || echo "Unable to obtain an IP address."
        trap 2
    fi

    # Recover files being edited when the system crashed.
    test -f /usr/bin/elvprsv && elvprsv /usr/tmp/elv*

    # Run the daily cleanup on systems that are not on at night.
    test -f /usr/etc/daily && sh /usr/etc/daily boot &

;;
stop|down)
        # Save random data, if /usr is mounted rw.
        if grep ' \/usr .*rw' /etc/mtab >/dev/null
        then
          if dd if=/dev/random of=$RANDOM_FILE.new bs=1024 count=1 2>/dev/null
          then
                mv $RANDOM_FILE.new $RANDOM_FILE
          else
                echo 'Failed to save random data.'
          fi
        fi
esac

d=/usr/local/etc/rc.d
# Let packages run their own scripts
if [ -d "$d" ]
then    if cd $d
        then
                echo -n "Local packages ($action): "
                for f in *
                do
                        if [ -x "$f" ]
                        then    echo -n "$f "
                                sh "$f" "$action"
                        fi
                done
                echo " done."
        fi
fi