# There can be stray (qemu) prompt in the socket. Try to drain
        # it
        try:
            sock.recv(64, socket.MSG_DONTWAIT)
        except socket.error as ex:
            if ex.errno != errno.EAGAIN and ex.errno != errno.EWOULDBLOCK:
                raise ex
        sock.send((command + "\n").encode("utf-8"))
        answer = ""
        while not answer.endswith("(qemu) "):
            chunk = sock.recv(1024)
            if chunk == b'':
                raise IOError("Unexpected EOF from monitor")
            answer += chunk.decode("utf-8")
    finally:
        fcntl.flock(sock, fcntl.LOCK_UN)
    return answer

def spiceurl(sock):
    """ Returns spice URI for given (as set of parsed args) VM """
    output = send_command(sock, "info spice")

    return lst

def parse_arp(iface):
    """
    Returns map which maps mac addresses to IPs for specified interface"
    """
    addr_map = {}
    pipe = os.popen("%s -n -i %s" % (config.get("tools", "arp"), iface), "r")
    for line in pipe:
        data = line.split()
        mac = data[2]
        if mac == "HWAddress":
            continue
        if mac == iface:
            # Foind line with (incomplete) entry

    answer = send_command(sock, "info block")
    return re.search(": /tmp", answer) is not None

def read_netinfo(filename):
    """ Reads network information from start script """
    with open(filename, "r") as f:
        for line in f:
            match = re.search("-net nic,(?:\S*,)?macaddr=(\\S+) -net ([^, ]+)", line)
            if match:
                f = {"mac":match.group(1)}
                if match.group(2) == "user":
                    f["iface"] = "user"
                elif match.group(2) == "bridge":
                    f["iface"] = re.search("br=(\\S+)", line).group(1)
                else:

            f["uri"] = uri[uri.rindex(":")+1:]
            f.update(get_netinfo(sock))
            sock.shutdown(socket.SHUT_RDWR)
            sock.close()
            f["state"] = "running"
    return f









def add_ip_address(listing):
    """ Adds IP addresses from ARP into VM listing """
    bridges = set()
    for vminfo in listing:
        if "ip" not in vminfo:
            bridges.add(vminfo["iface"])
    arp_data = {}
    for bridge in bridges:
        arp_data.update(parse_arp(bridge))
    for vminfo in listing:
        if "mac" in vminfo and not "ip" in vminfo:
            if vminfo["mac"] in arp_data:
                vminfo["ip"] = arp_data[vminfo["mac"]]
            else:
                vminfo["ip"] = "-"
def all_vms(patterns=["*"]):
    """
    Returns list of tuples  vmname, vmtype, directory
    for all vms
    """
    import fnmatch
    search_path = [("private", os.path.join(pwd.getpwuid(os.getuid()).pw_dir,
                                            "VWs")),
                   ("shared", config.get("directories", "SharedVMs")),
                   ("autostart", config.get("directories", "AutostartVMs"))]
    vmlist = []
    for (vmtype, dirname) in search_path:
        if not os.access(dirname, os.X_OK):
            continue
        for vmname in os.listdir(dirname):
            if not os.access(os.path.join(dirname, vmname, "start"), os.X_OK):
                continue
            matches = False
            for pattern in patterns:
                if fnmatch.fnmatch(vmname, pattern):
                    matches = True
                    break
            if matches:
                vmlist.append((vmname, vmtype, os.path.join(dirname, vmname)))
    return vmlist
def cmd_list(options):
    """ vws list """
    count = 0
    maxlen = 0
    vms = []
    for vmname, vmtype, dirname in all_vms(options.pattern):


        count += 1
        if maxlen < len(vmname):
            maxlen = len(vmname)
        if options.state:
            vms.append(make_vm_listing(vmname, dirname, vmtype))
        else:
            vms.append({"name":vmname})

        os.system("qemu-img create -f qcow2 -b \"%s\" \"%s\"" %
                  (newnames[i], i))
        os.chmod(i, 0o664)
    return 0

def cmd_snapshots(options):
    """ vws snapshots - list existing snapshots """
    if not options.stopped:
        print("Cannot list snapshots of running VW", file=sys.stderr)
        sys.exit(1)
    os.chdir(options.dir)
    drives = get_drives(options.dir)
    lst = []
    info = {}
    with os.popen("qemu-img info --backing-chain " + drives[0], "r") as f:
        for line in f:
            if line.find(": ") != -1:
                var, val = line.strip().split(": ")
                if val != "":
                    info[var] = val
            elif line[0] == '\n':
                lst.append(info)
                info = {}
        if info:
            lst.append(info)
    for snap in lst:
        print("%-30s  %+8s  %+8s" % (snap["image"], snap["virtual size"],
                                     snap["disk size"]))


def get_backing(drive):
    """ find if partucular virtual drive has backing file and returns