Digital Equipment Corporation

Mark C Ozur

James W Kelly

Steven M Jenness

Jeffrey A East

James J Walker

Thomas Jay Miller

Benn L Schreiber

Robert Bismuth

Claire R Cockcroft

Dennis J Doherty

Charles T Lenzmeier

In a multitasking, multiuser computer system, a server process temporarily impersonates the characteristics of a client process when the client process preforms a remote procedure call on the server process. Each process has an identifier list with a plurality of identifiers that characterize the process. The server process generates a new identifier list which is either the same as the client process's list, or is the union of the server's and the client's lists. Each object in the system can have an access control list which defines the identifiers that a process must have in order to access the object. The operation system has access checking software for enabling a selected process access to a specified object when the identifiers for the process match the list of identifiers in the access control list of the specified object. The server can therefore access all objects accessible to the client while the server is working for the client. The server can restore its original identifier list after completing the services that it performs for the client.

System for determining the rights of object access for a server process

A method is provided for executing an application on a compute server of a computer network that includes the compute server and at least one client system, the method comprising the steps of: activating a process and a server thread running on the compute server; obtaining initial client context information from a context server running on the at least one client system; producing on the compute server a bound process bounded by the context server running on the at least one client system; executing the application in the bound process on the compute server; and in the course of the step of executing the bound process, obtaining additional client context information as requested by the application from the context server.

Computer network providing transparent operation on a compute server and

A method is provided for use in a computer system, the method for performing callbacks to a first calling thread that has made an RPC to a second called thread comprising the steps of: creating at least one respective helper thread in the address space of the second called thread; and for each respective created helper thread, providing a respective thread-specific identifying mechanism for identifying the first calling thread.

RPC based computer system using transparent callback and associated

In a multitasking, multiuser computer system, a server process temporarily impersonates the characteristics of a client process when the client process preforms a remote procedure call on the server process. Each process has an identifier list with a plurality of identifiers that characterize the process. The server process generates a new identifier list which is either the same as the client process's list, or is the union of the server's and the client's lists. Each object in the system can have an access control list which defines the identifiers that a process must have in order to access the object. The operation system has access checking software for enabling a selected process access to a specified object when the identifers for the process match the list of identifiers in the access control list of the specified object. The server can therefore access all objects accessible to the client while the server is working for the client. The server can restore its original identifier list after completing the services that it performs for the client.

Server impersonation of client processes in an object based computer

Growing community of inventors

Redmond, WA, United States of America

Mark C Ozur