core-agent-linux/vm-init.d/qubes-updates-proxy-forwarder

#!/bin/bash
#
# Updates proxy forwarder     Startup script for the updates proxy forwarder
#
# chkconfig: 345 85 15
# description: forwards connection to updates proxy over Qubes RPC
#
# processname: ncat
# pidfile:     /var/run/qubes-updates-proxy-forwarder.pid
#

# Source function library.
# shellcheck disable=SC1091
. /etc/rc.d/init.d/functions

# Source Qubes library.
# shellcheck source=init/functions
. /usr/lib/qubes/init/functions

# Source networking configuration.
# shellcheck disable=SC1091
.  /etc/sysconfig/network

# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0

exec="/usr/bin/ncat"
prog=$(basename $exec)
pidfile="/var/run/qubes-updates-proxy-forwarder.pid"

# shellcheck disable=SC1091
[ -e /etc/sysconfig/qubes-updates-proxy-forwarder ] && . /etc/sysconfig/qubes-updates-proxy-forwarder

lockfile=/var/lock/subsys/qubes-updates-proxy-forwarder

start() {
    have_qubesdb || return

    if ! qsvc updates-proxy-setup ; then
        # updates proxy configuration disabled
        exit 0
    fi

    if qsvc qubes-updates-proxy ; then
        # updates proxy running here too, avoid looping traffic back to itself
        exit 0
    fi

    [ -x $exec ] || exit 5

    echo -n $"Starting $prog (as Qubes updates proxy forwarder): "
    # shellcheck disable=SC2016
    start-stop-daemon \
        --exec $exec \
        --pidfile "$pidfile" \
        --make-pidfile \
        --background \
        --start \
        -- \
        -k -l -e 'qrexec-client-vm $default qubes.UpdatesProxy'
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}

stop() {
    echo -n $"Stopping $prog: "
    killproc -p $pidfile "$prog"
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}

restart() {
    stop
    start
}

force_reload() {
    restart
}

rh_status() {
    status "$prog"
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}

case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart)
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
        restart
        ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|force-reload}"
        exit 2
esac
exit $?