_privdrop_unix.py 文件源码

def _setuser(user):
    ''' Normalizes user to a uid and sets the current uid, or does 
    nothing if user is None.
    '''
    if user is None:
        return

    # Normalize group to gid
    elif isinstance(user, str):
        uid = pwd.getpwnam(user).pw_uid
    # The group is already a gid.
    else:
        uid = user

    try:
        os.setuid(uid)
    except OSError:
        self.logger.error('Unable to change user.')
        sys.exit(1)