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# -*- test-case-name: twisted.conch.test.test_manhole -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Asynchronous local terminal input handling
@author: Jp Calderone
"""
import os
import sys
import termios
import tty
from twisted.conch.insults.insults import ServerProtocol
from twisted.conch.manhole import ColoredManhole
from twisted.internet import defer, protocol, reactor, stdio
from twisted.python import failure, log, reflect
class UnexpectedOutputError(Exception):
pass
class TerminalProcessProtocol(protocol.ProcessProtocol):
def __init__(self, proto):
self.proto = proto
self.onConnection = defer.Deferred()
def connectionMade(self):
self.proto.makeConnection(self)
self.onConnection.callback(None)
self.onConnection = None
def write(self, data):
"""
Write to the terminal.
@param data: Data to write.
@type data: L{bytes}
"""
self.transport.write(data)
def outReceived(self, data):
"""
Receive data from the terminal.
@param data: Data received.
@type data: L{bytes}
"""
self.proto.dataReceived(data)
def errReceived(self, data):
"""
Report an error.
@param data: Data to include in L{Failure}.
@type data: L{bytes}
"""
self.transport.loseConnection()
if self.proto is not None:
self.proto.connectionLost(failure.Failure(UnexpectedOutputError(data)))
self.proto = None
def childConnectionLost(self, childFD):
if self.proto is not None:
self.proto.childConnectionLost(childFD)
def processEnded(self, reason):
if self.proto is not None:
self.proto.connectionLost(reason)
self.proto = None
class ConsoleManhole(ColoredManhole):
"""
A manhole protocol specifically for use with L{stdio.StandardIO}.
"""
def connectionLost(self, reason):
"""
When the connection is lost, there is nothing more to do. Stop the
reactor so that the process can exit.
"""
reactor.stop()
def runWithProtocol(klass):
fd = sys.__stdin__.fileno()
oldSettings = termios.tcgetattr(fd)
tty.setraw(fd)
try:
stdio.StandardIO(ServerProtocol(klass))
reactor.run()
finally:
termios.tcsetattr(fd, termios.TCSANOW, oldSettings)
os.write(fd, b"\r\x1bc\r")
def main(argv=None):
log.startLogging(open("child.log", "w"))
if argv is None:
argv = sys.argv[1:]
if argv:
klass = reflect.namedClass(argv[0])
else:
klass = ConsoleManhole
runWithProtocol(klass)
if __name__ == "__main__":
main()
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