# ``twisted`.`internet`.`posixbase`.`_SIGCHLDWaker``

class documentation

`class _SIGCHLDWaker(_FDWaker): (source)`

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`_SIGCHLDWaker` can wake up a reactor whenever `SIGCHLD` is received.

See Also
`twisted.internet._signals`

Method | `__init__` | Initialize.
Method | `doRead` | Having woken up the reactor in response to receipt of `SIGCHLD`, reap the process which exited.
Method | `install` | Install the handler necessary to make this waker active.
Method | `uninstall` | Remove the handler which makes this waker active.

Inherited from `_FDWaker`:

Method | `connectionLost` | Close both ends of my pipe.
Class Variable | `disconnected` | Undocumented
Instance Variable | `fileno` | Undocumented
Instance Variable | `i` | The file descriptor which should be monitored in order to be awoken by this waker.
Instance Variable | `o` | The file descriptor for the end of the pipe which can be written to wake up a reactor monitoring this waker.
Instance Variable | `reactor` | Undocumented

Inherited from `Logger` (via `_FDWaker`):

Method | `logPrefix` | Override this method to insert custom logging behavior. Its return value will be inserted in front of every line. It may be called more times than the number of output lines.

def __init__(self, reactor): (source)
overrides `twisted.internet.posixbase._FDWaker.__init__`
Initialize.
def doRead(self): (source)
overrides `twisted.internet.posixbase._FDWaker.doRead`

Having woken up the reactor in response to receipt of `SIGCHLD`, reap the process which exited.

This is called whenever the reactor notices the waker pipe is writeable, which happens soon after any call to the `wakeUp` method.

def install(self): (source)
Install the handler necessary to make this waker active.
def uninstall(self): (source)
Remove the handler which makes this waker active.