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Publications

PLEASE NOTE: The Publications System provided by the Manufacturing Systems Integration Division (MSID) has moved to: http://www.mel.nist.gov/msidlibrary/publications.html. The pages below are maintained for archival purposes only.

Publication summary

Author(s): Don Libes

Publication date: June 1987

Citation: Don Libes: "Multiple Programs in One UNIX Process," Proceedings of the 1987 Summer USENIX Conference, June, 1987.

Availability:

  • Postscript
  • A paper copy of this document is available by contacting Kristy Thompson [web,email]
Abstract:
A small operating system (XINU) was ported to UNIX 4.2BSD. The entire operating system runs as a single UNIX process. The code is approximately 1000 lines of C (including comments) and 6 lines of assembler. All of the code is user-level, and thus presents a system easy to examine, understand, and experiment with further. The code has been used as a base for an application of several cooperating processes communicating through global variables. Alternatively, the system provides semaphores and messages for Interprocess communication.

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