def bind_port(sock, host=HOST):

    if sock.family == socket.AF_INET and sock.type == socket.SOCK_STREAM:
        if hasattr(socket, 'SO_REUSEADDR'):
            if sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR) == 1:
                raise TestFailed("tests should never set the SO_REUSEADDR "   \
                                 "socket option on TCP/IP sockets!")
        if hasattr(socket, 'SO_REUSEPORT'):
            try:
                if sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT) == 1:
                    raise TestFailed("tests should never set the SO_REUSEPORT "   \
                                     "socket option on TCP/IP sockets!")
            except socket.error:
                # Python's socket module was compiled using modern headers
                # thus defining SO_REUSEPORT but this process is running
                # under an older kernel that does not support SO_REUSEPORT.
                pass
        if hasattr(socket, 'SO_EXCLUSIVEADDRUSE'):
            sock.setsockopt(socket.SOL_SOCKET, socket.SO_EXCLUSIVEADDRUSE, 1)

    sock.bind((host, 0))
    port = sock.getsockname()[1]
    return port
Bind the socket to a free port and return the port number.  Relies on
dataset/ETHPy150Open OpenCobolIDE/OpenCobolIDE/open_cobol_ide/extlibs/future/backports/test/support.py/bind_port