The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group

This help file is not part of the standard, but is provided for information.

Codes

The codes and their meanings are as follows. See also Margin Code Notation which includes a note of differences in convention between the printed PDF and HTML renditions of this standard.

 

[ADV][Option Start] Advisory Information [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the ADV margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the ADV margin legend.

See help on Margin Code Notation.

 

[AIO][Option Start] Asynchronous Input and Output [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the AIO margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the AIO margin legend.

See help on Margin Code Notation.

 

[BAR][Option Start] Barriers [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the BAR margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the BAR margin legend.

See help on Margin Code Notation.

 

[BE][Option Start] Batch Environment Services and Utilities [Option End]
The functionality described is optional.

Where applicable, utilities are marked with the BE margin legend in the SYNOPSIS section. Where additional semantics apply to a utility, the material is identified by use of the BE margin legend.

See help on Margin Code Notation.

 

[CD][Option Start] C-Language Development Utilities [Option End]
The functionality described is optional.

Where applicable, utilities are marked with the CD margin legend in the SYNOPSIS section. Where additional semantics apply to a utility, the material is identified by use of the CD margin legend.

See help on Margin Code Notation.

 

[CPT][Option Start] Process CPU-Time Clocks [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the CPT margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the CPT margin legend.

See help on Margin Code Notation.

 

[CS][Option Start] Clock Selection [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the CS margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the CS margin legend.

See help on Margin Code Notation.

 

[CX][Option Start] Extension to the ISO C standard [Option End]
The functionality described is an extension to the ISO C standard. Application writers may make use of an extension as it is supported on all IEEE Std 1003.1-2001-conforming systems.

With each function or header from the ISO C standard, a statement to the effect that ``any conflict is unintentional'' is included. That is intended to refer to a direct conflict. IEEE Std 1003.1-2001 acts in part as a profile of the ISO C standard, and it may choose to further constrain behaviors allowed to vary by the ISO C standard. Such limitations are not considered conflicts.

Where additional semantics apply to a function or header, the material is identified by use of the CX margin legend.

See help on Margin Code Notation.

 

[FD][Option Start] FORTRAN Development Utilities [Option End]
The functionality described is optional.

Where applicable, utilities are marked with the FD margin legend in the SYNOPSIS section. Where additional semantics apply to a utility, the material is identified by use of the FD margin legend.

See help on Margin Code Notation.

 

[FR][Option Start] FORTRAN Runtime Utilities [Option End]
The functionality described is optional.

Where applicable, utilities are marked with the FR margin legend in the SYNOPSIS section. Where additional semantics apply to a utility, the material is identified by use of the FR margin legend.

See help on Margin Code Notation.

 

[FSC][Option Start] File Synchronization [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the FSC margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the FSC margin legend.

See help on Margin Code Notation.

 

[IP6][Option Start] IPV6 [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the IP6 margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the IP6 margin legend.

See help on Margin Code Notation.

 

[MC1][Option Start] Advisory Information and either Memory Mapped Files or Shared Memory Objects [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

This is a shorthand notation for combinations of multiple option codes.

Where applicable, functions are marked with the MC1 margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the MC1 margin legend.

Refer to Margin Code Notation .

See help on Margin Code Notation.

 

[MC2][Option Start] Memory Mapped Files, Shared Memory Objects, or Memory Protection [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

This is a shorthand notation for combinations of multiple option codes.

Where applicable, functions are marked with the MC2 margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the MC2 margin legend.

Refer to Margin Code Notation .

See help on Margin Code Notation.

 

[MC3] [Option Start] Memory Mapped Files, Shared Memory Objects, or Typed Memory Objects [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

This is a shorthand notation for combinations of multiple option codes.

Where applicable, functions are marked with the MC3 margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the MC3 margin legend.

Refer to Margin Code Notation .

 

[MF][Option Start] Memory Mapped Files [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the MF margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the MF margin legend.

See help on Margin Code Notation.

 

[ML][Option Start] Process Memory Locking [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the ML margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the ML margin legend.

See help on Margin Code Notation.

 

[MLR][Option Start] Range Memory Locking [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the MLR margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the MLR margin legend.

See help on Margin Code Notation.

 

[MON][Option Start] Monotonic Clock [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the MON margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the MON margin legend.

See help on Margin Code Notation.

 

[MPR][Option Start] Memory Protection [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the MPR margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the MPR margin legend.

See help on Margin Code Notation.

 

[MSG][Option Start] Message Passing [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the MSG margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the MSG margin legend.

See help on Margin Code Notation.

 

[MX][Option Start] IEC 60559 Floating-Point Option [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the MX margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the MX margin legend.

See help on Margin Code Notation.

   

[OB][Option Start] Obsolescent [Option End]
The functionality described may be withdrawn in a future version of this volume of IEEE Std 1003.1-2001. Strictly Conforming POSIX Applications and Strictly Conforming XSI Applications shall not use obsolescent features.

Where applicable, the material is identified by use of the OB margin legend.

See help on Margin Code Notation.

 

[OF][Option Start] Output Format Incompletely Specified [Option End]
The functionality described is an XSI extension. The format of the output produced by the utility is not fully specified. It is therefore not possible to post-process this output in a consistent fashion. Typical problems include unknown length of strings and unspecified field delimiters.

Where applicable, the material is identified by use of the OF margin legend.

See help on Margin Code Notation.

 

[OH][Option Start] Optional Header [Option End]
In the SYNOPSIS section of some interfaces in the System Interfaces volume of IEEE Std 1003.1-2001 an included header is marked as in the following example:

[OH][Option Start]
#include <sys/types.h>
[Option End]
#include <grp.h>
struct group *getgrnam(const char *name);

The OH margin legend indicates that the marked header is not required on XSI-conformant systems.

See help on Margin Code Notation.

 

[PIO][Option Start] Prioritized Input and Output [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the PIO margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the PIO margin legend.

See help on Margin Code Notation.

 

[PS][Option Start] Process Scheduling [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the PS margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the PS margin legend.

See help on Margin Code Notation.

 

[RS][Option Start] Raw Sockets [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the RS margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the RS margin legend.

See help on Margin Code Notation.

 

[RTS][Option Start] Realtime Signals Extension [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the RTS margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the RTS margin legend.

See help on Margin Code Notation.

 

[SD][Option Start] Software Development Utilities [Option End]
The functionality described is optional.

Where applicable, utilities are marked with the SD margin legend in the SYNOPSIS section. Where additional semantics apply to a utility, the material is identified by use of the SD margin legend.

See help on Margin Code Notation.

 

[SEM][Option Start] Semaphores [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the SEM margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the SEM margin legend.

See help on Margin Code Notation.

 

[SHM][Option Start] Shared Memory Objects [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the SHM margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the SHM margin legend.

See help on Margin Code Notation.

 

[SIO][Option Start] Synchronized Input and Output [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the SIO margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the SIO margin legend.

See help on Margin Code Notation.

 

[SPI][Option Start] Spin Locks [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the SPI margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the SPI margin legend.

See help on Margin Code Notation.

 

[SPN][Option Start] Spawn [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the SPN margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the SPN margin legend.

See help on Margin Code Notation.

 

[SS][Option Start] Process Sporadic Server [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the SS margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the SS margin legend.

See help on Margin Code Notation.

 

[TCT][Option Start] Thread CPU-Time Clocks [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TCT margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TCT margin legend.

See help on Margin Code Notation.

 

[TEF][Option Start] Trace Event Filter [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TEF margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TEF margin legend.

See help on Margin Code Notation.

 

[THR][Option Start] Threads [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the THR margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the THR margin legend.

See help on Margin Code Notation.

 

[TMO][Option Start] Timeouts [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TMO margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TMO margin legend.

See help on Margin Code Notation.

 

[TMR][Option Start] Timers [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TMR margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TMR margin legend.

See help on Margin Code Notation.

 

[TPI][Option Start] Thread Priority Inheritance [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TPI margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TPI margin legend.

See help on Margin Code Notation.

 

[TPP][Option Start] Thread Priority Protection [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TPP margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TPP margin legend.

See help on Margin Code Notation.

 

[TPS][Option Start] Thread Execution Scheduling [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TPS margin legend for the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TPS margin legend.

See help on Margin Code Notation.

   

[TRC][Option Start] Trace [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TRC margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TRC margin legend.

See help on Margin Code Notation.

 

[TRI][Option Start] Trace Inherit [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TRI margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TRI margin legend.

See help on Margin Code Notation.

 

[TRL][Option Start] Trace Log [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TRL margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TRL margin legend.

See help on Margin Code Notation.

 

[TSA][Option Start] Thread Stack Address Attribute [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TSA margin legend for the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TSA margin legend.

See help on Margin Code Notation.

 

[TSF][Option Start] Thread-Safe Functions [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TSF margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TSF margin legend.

See help on Margin Code Notation.

 

[TSH][Option Start] Thread Process-Shared Synchronization [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TSH margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TSH margin legend.

See help on Margin Code Notation.

 

[TSP][Option Start] Thread Sporadic Server [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TSP margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TSP margin legend.

See help on Margin Code Notation.

 

[TSS][Option Start] Thread Stack Address Size [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TSS margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TSS margin legend.

See help on Margin Code Notation.

 

[TYM][Option Start] Typed Memory Objects [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the TYM margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the TYM margin legend.

See help on Margin Code Notation.

 

[UP][Option Start] User Portability Utilities [Option End]
The functionality described is optional.

Where applicable, utilities are marked with the UP margin legend in the SYNOPSIS section. Where additional semantics apply to a utility, the material is identified by use of the UP margin legend.

See help on Margin Code Notation.

 

[XSI][Option Start] Extension [Option End]
The functionality described is an XSI extension. Functionality marked XSI is also an extension to the ISO C standard. Application writers may confidently make use of an extension on all systems supporting the X/Open System Interfaces Extension.

If an entire SYNOPSIS section is shaded and marked XSI, all the functionality described in that reference page is an extension. See XSI Conformance .

See help on Margin Code Notation.

 

[XSR][Option Start] XSI STREAMS [Option End]
The functionality described is optional. The functionality described is also an extension to the ISO C standard.

Where applicable, functions are marked with the XSR margin legend in the SYNOPSIS section. Where additional semantics apply to a function, the material is identified by use of the XSR margin legend.


Margin Code Notation

Some of the functionality described in this standard depends on support of more than one option, or independently may depend on several options. The HTML rendition uses different conventions to the printed and PDF version of this standard: shading is used in SYNOPSIS and at the start of the DESCRIPTION text only; graphical tags are used to denote the start and end of optional text throughout the html text.

The following notation for margin codes is used to denote the following cases.

A Feature Dependent on One or Two Options

In this case, margin codes have a <space> separator; for example:

[MF][Option Start] This feature requires support for only the Memory Mapped Files option. [Option End]

[MF SHM][Option Start] This feature requires support for both the Memory Mapped Files and the Shared Memory Objects options; that is, an application which uses this feature is portable only between implementations that provide both options. [Option End]

A Feature Dependent on Either of the Options Denoted

In this case, margin codes have a '|' separator to denote the logical OR; for example:

[MF|SHM][Option Start] This feature is dependent on support for either the Memory Mapped Files option or the Shared Memory Objects option; that is, an application which uses this feature is portable between implementations that provide any (or all) of the options. [Option End]

A Feature Dependent on More than Two Options

The following shorthand notations are used:

[MC1][Option Start] The MC1 margin code is shorthand for ADV ( MF | SHM ). Features which are marked with this margin code require support of the Advisory Information option and either the Memory Mapped Files or Shared Memory Objects option. [Option End]

[MC2][Option Start] The MC2 margin code is shorthand for MF | SHM | MPR. Features which are marked with this margin code require support of either the Memory Mapped Files, Shared Memory Objects, or Memory Protection options. [Option End]

[MC3] [Option Start] The MC3 margin code is shorthand for MF|SHM|TYM. Features which are shaded with this margin code require support of either the Memory Mapped Files, Shared Memory Objects, or Typed Memory Objects options. [Option End]

Large Sections Dependent on an Option

Where large sections of text are dependent on support for an option, a lead-in text block is provided and marked accordingly; for example:

[TRC][Option Start] This section describes extensions to support tracing of user applications. This functionality is dependent on support of the Trace option (and the rest of this section is not further marked for this option). [Option End]

This help file is not part of the standard, but is provided for information.

UNIX ® is a registered Trademark of The Open Group.
POSIX ® is a registered Trademark of The IEEE.