if [ -n "$NBD_ROOT_HOST" ]; then
    # register pids of nbd-client and nbd-proxy so that sendsigs doesn't kill
    # them on shutdown/reboot.

    # FIXME: only register pids relevent to the root filesystem.
    nbd_pids=$(pgrep '^nbd-client|^nbd-proxy')
    for d in /run/sendsigs.omit.d /lib/init/rw/sendsigs.omit.d /var/run/sendsigs.omit.d ; do
        if [ -d "$d" ]; then
            for p in $nbd_pids ; do
                echo "$p" >> "$d"/ltsp || true
            done
        fi
    done
fi
