continue
            name = line[:n]
            if name == "bridge name":
                continue
            lst.append(name)
    return lst

def validate_size(size):
    return re.match('\d+[KMG]',size) is not None

def get_drives(vm_dir):
    """ Return list of drive files in the VW directory """
    result=[]
    with open(vm_dir+"/start") as f:
        for line in f:
            if (re.match("\s*-drive .*",line) and
                line.find("media=disk")>-1):
                m=re.search("file=([^,\s]*)",line)
                if m:
                    result.append(m.group(1))
    return result


#
# command implementation
#

def cmd_spiceuri(options):

        if options.snapshot:
            arg=arg+" -snapshot"
        if options.args:
            arg=arg+" "+"".join(options.args)
        print arg
        cwd=os.getcwd()
        os.chdir(options.dir)
        # Check for snapshot
        next=0
        snapshot_id=None
        with os.popen("qemu-img info \"%s\"" % (get_drives(options.dir)[0]),"r") as f:
            for line in f:
                if line == 'Snapshot list:\n':
                    next=2
                elif next==2 and line.startswith('ID'):
                    next=1
                elif next==1:
                    next=0
                    snapshot_id = line[:line.index(' ')]
                    arg=arg+" -loadvm " + snapshot_id
                    break

        os.system("./start%s" % arg)
        os.chdir(cwd)
        time.sleep(2)
        options.sock = connect_vm(options.dir)
        if snapshot_id:
            send_command(options.sock,"delvm "+snapshot_id)
    else:
        if options.snapshot or options.args:
            print >>sys.stderr, "Cannot change qemu options. VM is already running"
        if options.cdrom:
            options.file = options.cdrom[0]
            cmd_cdrom(options)    
    if options.gui:

                print "UNSOLICITED MESSAGE %"+options.sock.readline().rstrip()
    except KeyboardInterrupt:
        print "Keyboard interrupt"
        sys.exit()
def cmd_reset(options):
    print send_command(options.sock,'system_reset')
def cmd_save(options):
    answer=send_command(options.sock,'savevm')
    if re.search("Error",answer):
        print >>sys.stderr,answer
        sys.exit(1)
    else:
        send_command(options.sock,'quit')

def cmd_cdrom(options):
    if options.id  is None:
        # Search for devices which could be interpreted as CDROM
        devlist=send_command(options.sock,"info block")
        for dev in  re.findall("([-\\w]+): [^\n]+\n    Removable device:",devlist):
            if re.search("cd",dev):
                options.id=dev

        print >>sys.stderr,"No sound recording in progress"
        sys.exit(1)
    else:
        print send_command(options.sock,"stopcapture "+m.group(1))
def cmd_version(options):
    print VERSION
















def cmd_snapshot(options):
    import os.path
    if not options.stopped:
        print >>sys.stderr,"Cannot make snapshot of running VW"
        sys.exit(1)
    drives=get_drives(options.dir)