Function _spawn

pymongo/daemon.py:92–109

Spawn the process and silence stdout/stderr.

(args: Sequence[str])

    # avoids triggering the application's os.register_at_fork() callbacks when
    # we spawn the mongocryptd daemon process.
    def _spawn(args: Sequence[str]) -> Optional[subprocess.Popen[Any]]:
        """Spawn the process and silence stdout/stderr."""
        try:
            with open(os.devnull, "r+b") as devnull:
                return subprocess.Popen(
                    args,  # noqa: S603
                    close_fds=True,
                    stdin=devnull,
                    stderr=devnull,
                    stdout=devnull,
                )
        except FileNotFoundError as exc:
            warnings.warn(
                f"Failed to start {args[0]}: is it on your $PATH?\nOriginal exception: {exc}",
                RuntimeWarning,
                stacklevel=2,
            )
        return None

    def _spawn_daemon_double_popen(args: Sequence[str]) -> None:
        """Spawn a daemon process using a double subprocess.Popen."""