src/python-systemd/daemon.py

   1 from ._daemon import (__version__,
   2                       booted,
   3                       _listen_fds,
   4                       _is_fifo,
   5                       _is_socket,
   6                       _is_socket_inet,
   7                       _is_socket_unix,
   8                       _is_mq,
   9                       LISTEN_FDS_START)
  10 from socket import AF_UNSPEC as _AF_UNSPEC
  11
  12 def _convert_fileobj(fileobj):
  13     try:
  14         return fileobj.fileno()
  15     except AttributeError:
  16         return fileobj
  17
  18 def is_fifo(fileobj, path=None):
  19     fd = _convert_fileobj(fileobj)
  20     return _is_fifo(fd, path)
  21
  22 def is_socket(fileobj, family=_AF_UNSPEC, type=0, listening=-1):
  23     fd = _convert_fileobj(fileobj)
  24     return _is_socket(fd, family, type, listening)
  25
  26 def is_socket_inet(fileobj, family=_AF_UNSPEC, type=0, listening=-1, port=0):
  27     fd = _convert_fileobj(fileobj)
  28     return _is_socket_inet(fd, family, type, listening)
  29
  30 def is_socket_unix(fileobj, type=0, listening=-1, path=None):
  31     fd = _convert_fileobj(fileobj)
  32     return _is_socket_unix(fd, type, listening, path)
  33
  34 def is_mq(fileobj, path=None):
  35     fd = _convert_fileobj(fileobj)
  36     return _is_mq(fd, path)
  37
  38 def listen_fds(unset_environment=True):
  39     """Return a list of socket activated descriptors
  40
  41     Example::
  42
  43       (in primary window)
  44       $ systemd-activate -l 2000 python3 -c \\
  45           'from systemd.daemon import listen_fds; print(listen_fds())'
  46       (in another window)
  47       $ telnet localhost 2000
  48       (in primary window)
  49       ...
  50       Execing python3 (...)
  51       [3]
  52     """
  53     num = _listen_fds(unset_environment)
  54     return list(range(LISTEN_FDS_START, LISTEN_FDS_START + num))