#!/usr/bin/env python3
"""Bound output from a disposable test process; never buffer it all in memory."""
import sys

remaining = 8 * 1024 * 1024
while True:
    chunk = sys.stdin.buffer.read(min(65536, remaining + 1))
    if not chunk:
        break
    if len(chunk) > remaining:
        print("\nIsolated test output exceeded 8 MiB", file=sys.stderr)
        sys.exit(125)
    sys.stdout.buffer.write(chunk)
    sys.stdout.buffer.flush()
    remaining -= len(chunk)