Viewing file:  stdio.py (2.71 KB) -rw-r--r--
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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, tty, sys, termios
from twisted.internet import reactor, stdio, protocol, defer
from twisted.python import failure, reflect, log
from twisted.conch.insults.insults import ServerProtocol
from twisted.conch.manhole import ColoredManhole
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:
p = ServerProtocol(klass)
stdio.StandardIO(p)
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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