def start_proc(self):
preexec = noop
stdin = stdout = stderr = None
cqlshlog.info("Spawning %r subprocess with args: %r and env: %r"
% (self.exe_path, self.args, self.env))
if self.realtty:
masterfd, slavefd = pty.openpty()
preexec = (lambda: set_controlling_pty(masterfd, slavefd))
self.proc = subprocess.Popen((self.exe_path,) + tuple(self.args),
env=self.env, preexec_fn=preexec,
stdin=stdin, stdout=stdout, stderr=stderr,
close_fds=False)
os.close(slavefd)
self.childpty = masterfd
self.send = self.send_tty
self.read = self.read_tty
else:
stdin = stdout = subprocess.PIPE
stderr = subprocess.STDOUT
self.proc = subprocess.Popen((self.exe_path,) + tuple(self.args),
env=self.env, stdin=stdin, stdout=stdout,
stderr=stderr, bufsize=0, close_fds=False)
self.send = self.send_pipe
if self.tty:
self.winpty = WinPty(self.proc.stdout)
self.read = self.read_winpty
else:
self.read = self.read_pipe
