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Abstract

A method and system for providing access to resources at a host computer to a remote user, without requiring the remote user to have detailed knowledge of the host computer. The system includes a host virtual operating system, resident on a host computer and having a set of resources including process control, a file system, interprocess communications, and a set of device interfaces, overlaid on and distinguished from the host computer's actual resources. The virtual host is capable of executing programs in a standardized programming language, to provide the ability to run programs that are host-independent. The virtual host is capable of limiting access to the host computer's actual resources. The system also includes a front-end invoked by the remote user. A server program at the host computer receives requests from a client program run by the remote user, and provides the virtual host operating system at the host computer. The server program includes an interpreter for the (interpreted) programming language, a process control subsystem, and a virtual file subsystem. The programming language includes a set of primitive commands for invoking the primitive operations of the process control subsystem, including interprocess communication primitive operations, and a set of primitive commands for invoking the primitive operations of the virtual file subsystem. The process control subsystem and the virtual file subsystem translate those primitive operations into a set of primitive operations provided by the host computer, and call upon those primitive operations provided by the host computer.

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