twisted.python.systemd.ListenFDs

ListenFDs provides access to file descriptors inherited from systemd.

Typically ListenFDs.fromEnvironment should be used to construct a new instance of ListenFDs.

Class Method	`fromEnvironment`	No summary
Method	`__init__`
Method	`inheritedDescriptors`
Class Variable	`_START`	File descriptors inherited from systemd are always consecutively numbered, with a fixed lowest "starting" descriptor. This gives the default starting descriptor. Since this must agree with the value systemd is using, it typically should not be overridden.
Instance Variable	`_descriptors`	A `list` of `int` giving the descriptors which were inherited.

@classmethod
def fromEnvironment(cls, environ=None, start=None): (source)

Parameters
environ:`Optional[Mapping[str, str]]`	A dictionary-like object to inspect to discover inherited descriptors. By default, `None`, indicating that the real process environment should be inspected. The default is suitable for typical usage.
start:`Optional[int]`	An integer giving the lowest value of an inherited descriptor systemd will give us. By default, `None`, indicating the known correct (that is, in agreement with systemd) value will be used. The default is suitable for typical usage.
Returns
`ListenFDs`	A new instance of `cls` which can be used to look up the descriptors which have been inherited.

def __init__(self, descriptors): (source)

Parameters
descriptors:`List[int]`	The descriptors which will be returned from calls to `inheritedDescriptors`.

def inheritedDescriptors(self): (source)

Returns
`Iterable[int]`	The configured descriptors.

_START: int = (source)

File descriptors inherited from systemd are always consecutively numbered, with a fixed lowest "starting" descriptor. This gives the default starting descriptor. Since this must agree with the value systemd is using, it typically should not be overridden.

_descriptors = (source)

A list of int giving the descriptors which were inherited.