1、 Reference numberISO/IEC/IEEE 9945:2009(E)Copyright 2001-2008, IEEE and The Open Group. All rights reservedINTERNATIONAL STANDARD ISO/IEC/IEEE9945First edition2009-09-15Information technology Portable Operating System Interface (POSIX) Base Specifications, Issue 7 Technologies de linformation Spcifi
2、cations de base de linterface pour la portabilit des systmes (POSIX), Issue 7 ISO/IEC/IEEE 9945:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are e
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7、, New York NY 10016-5997, USA Tel. + 41 22 749 01 11 E-mail stds.iprieee.org Fax + 41 22 749 09 47 Web www.ieee.org E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii Copyright 2001-2008, IEEE and The Open Group. All rights reservedISO/IEC/IEEE 9945:2009(E) Copyright 2001-2008, IEEE
8、 and The Open Group. All rights reserved iiiForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the developme
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17、ely their own responsibility. Further information may be obtained from ISO or the IEEE Standards Association. ISO/IEC/IEEE 9945 was prepared by The Open Group (as The Open Group Technical Standard Base Specifications, Issue 7) and the Portable Applications Standards Committee of the Computer Society
18、 of the IEEE (as IEEE Std 1003.1-2008). It was adopted by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 22, Programming languages, their environments and system software interfaces, in parallel with its approval by the ISO/IEC national bodies, under the “fast-track
19、 procedure” defined in the Partner Standards Development Organization cooperation agreement between ISO and IEEE. IEEE is responsible for the maintenance of this document with participation and input from ISO/IEC national bodies. This first edition of ISO/IEC/IEEE 9945 cancels and replaces ISO/IEC 9
20、945-1:2003, ISO/IEC 9945-2:2003, ISO/IEC 9945-3:2003 and ISO/IEC 9945-4:2003, which have been technically revised. It also incorporates the Technical Corrigenda ISO/IEC 9945-1:2003/Cor.1:2004, ISO/IEC 9945-2:2003/Cor.1:2004, ISO/IEC 9945-3:2003/Cor.1:2004 and ISO/IEC 9945-4:2003/Cor.1:2004. ISO/IEC/
21、IEEE 9945:2009(E) iv Copyright 2001-2008, IEEE and The Open Group. All rights reserved(blank page) IEEE Std 1003.1-2008(Revision of IEEE Std 1003.1-2004) Standard for Information Technology Portable Operating System Interface (POSIX) Base Specifications, Issue 7IEEE3 Park Avenue New York, NY 10016-5
22、997, USA1 December 2008IEEE Computer SocietySponsored by the Portable Applications Standards Committee and The Open Group1003.1TMISO/IEC/IEEE 9945:2009(E)Copyright 2001-2008, IEEE and The Open Group. All rights reserved v ISO/IEC/IEEE 9945:2009(E) vi Copyright 2001-2008, IEEE and The Open Group. All
23、 rights reserved(blank page) IEEE Std 1003.1-2008 (Revision of IEEE Std 1003.1-2004) The Open Group Technical Standard Base Specifications, Issue 7 Standard for Information Technology Portable Operating System Interface (POSIX) Base Specifications, Issue 7 Sponsor Portable Applications Standards Com
24、mittee of the IEEE Computer Society and The Open Group Approved 26 September 2008 IEEE-SA Standards Board Approved 24 July 2008 The Open Group ISO/IEC/IEEE 9945:2009(E)Copyright 2001-2008, IEEE and The Open Group. All rights reserved viiAbstract POSIX.1-2008 is simultaneously IEEE Std 1003.1-2008 an
25、d The Open Group Technical Standard Base Specifications, Issue 7. POSIX.1-2008 defines a standard operating system interface and environment, including a command interpreter (or “shell”), and common utility programs to support applications portability at the source code level. POSIX.1-2008 is intend
26、ed to be used by both application developers and system implementors and comprises four major components (each in an associated volume): g120 General terms, concepts, and interfaces common to all volumes of this standard, including utility conventions and C-language header definitions, are included
27、in the Base Definitions volume. g120 Definitions for system service functions and subroutines, language-specific system services for the C programming language, function issues, including portability, error handling, and error recovery, are included in the System Interfaces volume. g120 Definitions
28、for a standard source code-level interface to command interpretation services (a “shell”) and common utility programs for application programs are included in the Shell and Utilities volume. g120 Extended rationale that did not fit well into the rest of the document structure, which contains histori
29、cal information concerning the contents of POSIX.1-2008 and why features were included or discarded by the standard developers, is included in the Rationale (Informative) volume. The following areas are outside the scope of POSIX.1-2008: g120 Graphics interfaces g120 Database management system inter
30、faces g120 Record I/O considerations g120 Object or binary code portability g120 System configuration and resource availability POSIX.1-2008 describes the external characteristics and facilities that are of importance to application developers, rather than the internal construction techniques employ
31、ed to achieve these capabilities. Special emphasis is placed on those functions and facilities that are needed in a wide variety of commercial applications. Keywords application program interface (API), argument, asynchronous, basic regular expression (BRE), batch job, batch system, built-in utility
32、, byte, child, command language interpreter, CPU, extended regular expression (ERE), FIFO, file access control mechanism, input/output (I/O), job control, network, portable operating system interface (POSIX), parent, shell, stream, string, synchronous, system, thread, X/Open System Interface (XSI) T
33、he Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA The Open Group Thames Tower, Station Road, Reading, Berkshire, RG1 1LX, U.K. Copyright 2008 by the Institute of Electrical and Electronics Engineers, Inc. and The Open Group All rights reserved. Pu
34、blished 1 December 2008 by the IEEE. Printed in the United States of America by the IEEE. PDF: ISBN 978-0-7381-5798-6 STD95820 CDROM: ISBN 978-0-7381-5799-3 STDCD95820 Published 1 December 2008 by The Open Group. Printed in the United Kingdom by The Open Group. Doc. Number: C082 ISBN: 1-931624-79-8
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