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Use of access matrix(存取矩阵的使用) If a process in Domain Di tries to do"op" on object then op"must be in the access matrix(若一个在域D中的进程试图对对象O作 操作“op”,“op”必须在访问矩阵中) ° Can be expanded to dynamic protection.(可以扩展到动态保护 Operations to add, delete access rights.(增加、删除访问权 限的操作) Special access rights:(特殊访问权限) owner of o1(O1的属主) y。 p from o, to O(从o到o的拷贝) contro/- D, can modify access rights(控制:D1能更 新D的访问权限) transfer- switch from domain d to d/(变换:域D1到域 D的切换) Applied Operating System Concepts Silberschatz, Galvin, and Gagne @199918.7 Silberschatz, Galvin, and Gagne ©1999 Applied Operating System Concepts Use of Access Matrix(存取矩阵的使用) • If a process in Domain Di tries to do “op” on object then “op” must be in the access matrix.(若一个在域Di中的进程试图对对象Oj作 操作“op”,“op”必须在访问矩阵中) • Can be expanded to dynamic protection.(可以扩展到动态保护 ) – Operations to add, delete access rights.(增加、删除访问权 限的操作) – Special access rights:(特殊访问权限) owner of Oi( Oi 的属主) copy op from Oi to Oj(从Oi 到Oj的拷贝) control – Di can modify access rights( 控制: Di 能更 新Dj的访问权限) transfer – switch from domain Di to Dj(变换:域Di 到域 Dj的切换)
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