System V Interface Definition

The System V Interface Definition (SVID)[1] is a standard that describes the AT&T UNIX System V behavior, including that of system calls, C libraries, available programs and devices. While it was not the first attempt at a standardizations document (the industry trade association /usr/group published a standard in 1984 based on System III with a few system call additions from BSD), it was an important effort of early standardization of UNIX in a period when UNIX variants were multiplying rapidly and portability was problematic at best. By 1986, AT&T required conformance with SVID issue 2 if vendors were to actually brand their products "System V R3".[2] By the 1990s, however, its importance was largely eclipsed by POSIX and the Single UNIX Specification, which were based in part upon the SVID. Part of the reason for this was undoubtedly their vendor-independent approach (see Unix wars).

Versions of SVID
  • Version 1, based on System V Release 2, published Spring, 1985[3]
  • Version 2, based on System V Release 3, published 1986 (3 volumes)[4]
  • Version 3, based on System V Release 4, published 1989
  • Version 4, updated for compliance with XPG4 and POSIX 1003.1-1990, published 1995
gollark: > `osmarks@fenrir ~> factor 260976178038066787831979074792050799823255192602588911719914752521213497360584746844430`This is taking an ominously long time.
gollark: I'm not really sure what the limits are.
gollark: That sounds... hard to factor?
gollark: Or I can work for the [REDACTED].
gollark: *How* not very large keys?

See also

References
  1. https://dl.acm.org/doi/book/10.5555/574242
  2. Libes, Don; Ressler Sandy (1989). Life with UNIX. Prentice Hall. p. 73. ISBN 0-13-536657-7.
  3. Kevorkian, D.E.; et al. (1985). System V Interface Definition: Issue 1. AT&T. LOC 84-073470.
  4. System V Interface Definition: Issue 2. AT&T. 1986. ISBN 0-932764-10-X.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.