Concurrency Control. R/RR/W W/W User 2 ReadWrite User 1 Read Write R/W: Inconsistent Read problem. W/W: Lost Update problem.
Access Control and Operating System Security John Mitchell.
Outline uAccess Control Concepts Matrix, ACL, Capabilities uOS Mechanisms Amoeba –Distributed, capabilities Unix –File system, Setuid Windows –File system,
Operating System Security John Mitchell. Operating System Functions uOS is a resource allocator Manages resources, decides between conflicting requests.
