If the effective UID of the caller is root, the real UID and saved set-user-ID are also set.

如果调用者的有效UID是根用户，那么还设置真实uid和保存的set - user - ID。

youdao

If the effective UID of the caller is root, the real UID and saved set-user-ID are also set.

如果调用者的有效UID是根用户，那么还设置真实uid和保存的set - user - ID。

youdao