Function _sync_flush

Lib/mailbox.py:2199–2203

Ensure changes to file f are physically on disk.

(f)

                                              os.getpid()))

def _sync_flush(f):
    """Ensure changes to file f are physically on disk."""
    f.flush()
    if hasattr(os, 'fsync'):
        os.fsync(f.fileno())

def _sync_close(f):
    """Close file f, ensuring all changes are physically on disk."""