_privdrop_unix.py 文件源码

def _setgroup(group):
    ''' Normalizes group to a gid and sets the current gid, or does 
    nothing if group is None.
    '''
    if group is None:
        return

    # Normalize group to gid
    elif isinstance(group, str):
        gid = grp.getgrnam(group).gr_gid
    # The group is already a gid.
    else:
        gid = group

    try:
        os.setgid(gid)
    except OSError:
        self.logger.error('Unable to change group.')
        sys.exit(1)