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About POSIX

About POSIX

  • General
    • Portable Operation System Integration
    • From 1988~
    • 여러 운영체제들이 사용하는 API가 모두 달라서 새발하는데 애로사항이 많으므로 최소한의 영역에서라도 통일 시켜보자는 의미에서 시작
    • spec : http://get.posixcertified.ieee.org/
    • Versions
      • POSIX.1 (IEEE 1003.1-1988): core services
      • POSIX.2 (IEEE 1003.2-1992) : shell & utility
      • POSIX.1b (IEEE 1003.1b-1993) : realtime related
      • POSIX.1c (IEEE 1003.1c-1995) : Thread related
    • POSIX.1 - 2017 까지 나옴
      • Process create&control, signals, file&directory operations, pipes, c lib, IO port interface and control, process triggers
  • POSIX PSE51-compliant API
    • IEEE 1003.13 에서 정의하고 있음
    • POSIX Realtime and Embedded Application Support(AEP)
    • PSE51-Minimal Realtime System Profile : small embedded systems, no MMU, no Disk, no terminal

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