_psposix.py 文件源码

def disk_usage(path):
    """Return disk usage associated with path."""
    try:
        st = os.statvfs(path)
    except UnicodeEncodeError:
        if not PY3 and isinstance(path, unicode):
            # this is a bug with os.statvfs() and unicode on
            # Python 2, see:
            # - https://github.com/giampaolo/psutil/issues/416
            # - http://bugs.python.org/issue18695
            try:
                path = path.encode(sys.getfilesystemencoding())
            except UnicodeEncodeError:
                pass
            st = os.statvfs(path)
        else:
            raise
    free = (st.f_bavail * st.f_frsize)
    total = (st.f_blocks * st.f_frsize)
    used = (st.f_blocks - st.f_bfree) * st.f_frsize
    percent = usage_percent(used, total, _round=1)
    # NB: the percentage is -5% than what shown by df due to
    # reserved blocks that we are currently not considering:
    # http://goo.gl/sWGbH
    return sdiskusage(total, used, free, percent)