util.py 文件源码

def is_setuid_root(path):
    """Return True if the file is owned by root and has
    the setuid bit set."""

    # Can't be setuid root if it's not there.
    if not os.path.isfile(path):
        return False

    pstat = os.stat(path)

    # Owned by root?
    if pstat.st_uid != 0:
        return False

    # Setuid bit set?
    if pstat.st_mode & stat.S_ISUID == 0:
        return False

    # Yay, passed all test!
    return True