conch.py 文件源码

def closed(self):
        global old
        log.msg('closed %s' % self)
        log.msg(repr(self.conn.channels))
        if not options['nocache']: # fork into the background
            if os.fork():
                if old:
                    fd = sys.stdin.fileno()
                    tty.tcsetattr(fd, tty.TCSANOW, old)
                if (options['command'] and options['tty']) or \
                    not options['notty']:
                    signal.signal(signal.SIGWINCH, signal.SIG_DFL)
                os._exit(0)
            os.setsid()
            for i in range(3):
                try:
                    os.close(i)
                except OSError, e:
                    import errno
                    if e.errno != errno.EBADF:
                        raise