Function wait_and_read_keychain

src/prefetch.py:162–181

Block until the prefetch child process exits; return stdout text. Returns ``None`` for the skipped-prefetch case (non-macOS or ``security`` unavailable) AND for any failure (timeout, non-zero exit). Callers fall back to interactive credential resolution.

(
    handle: PrefetchHandle, timeout: float = 5.0
)

def wait_and_read_keychain(
    handle: PrefetchHandle, timeout: float = 5.0
) -> str | None:
    """Block until the prefetch child process exits; return stdout text.

    Returns ``None`` for the skipped-prefetch case (non-macOS or
    ``security`` unavailable) AND for any failure (timeout, non-zero
    exit). Callers fall back to interactive credential resolution.
    """
    if handle.process is None:
        return None
    try:
        stdout, _stderr = handle.process.communicate(timeout=timeout)
    except subprocess.TimeoutExpired:
        handle.process.kill()
        return None
    if handle.process.returncode != 0:
        return None
    text = stdout.decode("utf-8", errors="replace").strip()
    return text or None


def start_mdm_raw_read() -> PrefetchHandle: