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name : daemon.py
 from socket import AF_UNSPEC as _AF_UNSPEC

from ._daemon import (__version__,
                      booted,
                      notify,
                      _listen_fds,
                      _listen_fds_with_names,
                      _is_fifo,
                      _is_socket,
                      _is_socket_inet,
                      _is_socket_sockaddr,
                      _is_socket_unix,
                      _is_mq,
                      LISTEN_FDS_START)

def _convert_fileobj(fileobj):
    try:
        return fileobj.fileno()
    except AttributeError:
        return fileobj

def is_fifo(fileobj, path=None):
    fd = _convert_fileobj(fileobj)
    return _is_fifo(fd, path)

def is_socket(fileobj, family=_AF_UNSPEC, type=0, listening=-1):
    fd = _convert_fileobj(fileobj)
    return _is_socket(fd, family, type, listening)

def is_socket_inet(fileobj, family=_AF_UNSPEC, type=0, listening=-1, port=0):
    fd = _convert_fileobj(fileobj)
    return _is_socket_inet(fd, family, type, listening, port)

def is_socket_sockaddr(fileobj, address, type=0, flowinfo=0, listening=-1):
    """Check socket type, address and/or port, flowinfo, listening state.

    Wraps sd_is_socket_inet_sockaddr(3).

    `address` is a systemd-style numerical IPv4 or IPv6 address as used in
    ListenStream=. A port may be included after a colon (":").
    See systemd.socket(5) for details.

    Constants for `family` are defined in the socket module.
    """
    fd = _convert_fileobj(fileobj)
    return _is_socket_sockaddr(fd, address, type, flowinfo, listening)

def is_socket_unix(fileobj, type=0, listening=-1, path=None):
    fd = _convert_fileobj(fileobj)
    return _is_socket_unix(fd, type, listening, path)

def is_mq(fileobj, path=None):
    fd = _convert_fileobj(fileobj)
    return _is_mq(fd, path)

def listen_fds(unset_environment=True):
    """Return a list of socket activated descriptors

    Example::

      (in primary window)
      $ systemd-socket-activate -l 2000 python3 -c \\
          'from systemd.daemon import listen_fds; print(listen_fds())'
      (in another window)
      $ telnet localhost 2000
      (in primary window)
      ...
      Execing python3 (...)
      [3]
    """
    num = _listen_fds(unset_environment)
    return list(range(LISTEN_FDS_START, LISTEN_FDS_START + num))

def listen_fds_with_names(unset_environment=True):
    """Return a dictionary of socket activated descriptors as {fd: name}

    Example::

      (in primary window)
      $ systemd-socket-activate -l 2000 -l 4000 --fdname=2K:4K python3 -c \\
          'from systemd.daemon import listen_fds_with_names; print(listen_fds_with_names())'
      (in another window)
      $ telnet localhost 2000
      (in primary window)
      ...
      Execing python3 (...)
      [3]
    """
    composite = _listen_fds_with_names(unset_environment)
    retval = {}
    for i in range(0, composite[0]):
        retval[i+LISTEN_FDS_START] = composite[1+i]
    return retval
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