標準號：ONORM EN 29945-1-1993
中文標準名稱：信息技術．可移植操作系統界面(POSIX)．第1部分：系統應用程序接口(API)[C語言] (ISO/IEC 9945－1-1990)
英文標準名稱：Information technology - Portable Operating System Interface (POSIX) - Part 1: System Application Program Interface (API) [C language] (ISO/IEC 9945-1:1990)
發布日期：1993/9/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This part of ISO/IEC 9945 defines a standard operating system interface and environment to support application portability at the source-code level. It is intended to be used by both application developers and system implementors.This part of ISO/IEC 9945 comprises four major components:(1) Terminology, concepts, and definitions and specifications that govern structures, headers, environment variables, and related requirements(2) Definitions for system service interfaces and subroutines(3) Language-specific system services for the C programming language(4) Interface issues, including portability, error handling, and error recovery The following areas are outside of the scope of this part of ISO/IEC 9945:(1) User interface (shell) and associated commands(2) Networking protocols and system call interfaces to those protocols(3) Graphics interfaces(4) Database management system interfaces(5) Record I/O considerations(6) Object or binary code portability(7) System configuration and resource availability(8) The behavior of system services on systems supporting concurrency within a single processThis part of ISO/IEC 9945 describes the external characteristics and facilities that are of importance to applications developers, rather than the internal construction techniques employed to achieve these capabilities. Special emphasis is placed on those functions and facilities that are needed in a wide variety of commercial applications.This part of ISO/IEC 9945 has been defined exclusively at the source-code level. The objective is that a Strictly Conforming POSIX.1 Application source program can be translated to execute on a conforming implementation.1.2 Normative ReferencesThe following standards contain provisions which, through references in this text, constitute provisions of this part of ISO/IEC 9945. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards.{1} ISO/IEC 646:1983,1) Information processing—ISO 7-bit coded character set for information interchange.{2} ISO/IEC 9899:... ,2) Information technology—Programming languages—C.