MyEMS/myems

def fcntl(fd, op, arg=0):
    return 0


def ioctl(fd, op, arg=0, mutable_flag=True):
    if mutable_flag:
        return 0
    else:
        return ""


def flock(fd, op):
    return


def lockf(fd, operation, length=0, start=0, whence=0):
    return