Linux Standard Base Trial Use Specification 4.1

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Table of Contents
Status of this Document
I. Introductory Elements
1. Scope
2. Normative References
3. Requirements
4. Terms and Definitions
5. Documentation Conventions
II. Trial Use Module
6. Trial Use Module
6.1. Introduction
A. GNU Free Documentation License (Informative)
A.12. How to use this License for your documents


This is version 4.1 of the Trial Use Specification. This specification augments the series of volumes released under the collective title Linux Standard Base:

Note that the Core, C++ and Desktop volumes consist of a generic volume augmented by an architecture-specific volume.

This document describes components which have Trial Use Specification status, and as such there is no formal compliance process for this specification. Implementations may claim to provide these components in a manner that agrees with this specification, but such a claim is not part of a conformance statement for the LSB version in which this module appears.

Applications may not assume that the components of this specification are present or operate as described in this specification on any given implementation.

Status of this Document

This document is a complement to the released specification. Other documents may supersede or augment this document. A list of current Linux Standard Base (LSB) specifications is available at

If you wish to make comments regarding this document in a manner that is tracked by the LSB project, please submit them using our public bug database at Please enter your feedback, carefully indicating the title of the section for which you are submitting feedback, and the volume and version of the specification where you found the problem, quoting the incorrect text if appropriate. If you are suggesting a new feature, please indicate what the problem you are trying to solve is. That is more important than the solution, in fact.

If you do not have or wish to create a bug database account then you can also e-mail feedback to (subscribe, archives), and arrangements will be made to transpose the comments to our public bug database.


The Trial Use Specification describes components which may or may not be present on an otherwise conforming system. The purpose is to indicate that these components are on a Standards Track, that is, they are intended to become part of the LSB Specification in a future edition.

This document should be used in conjunction with the documents it references. Information referenced in this way is as much a part of this document as is the information explicitly included here.

I. Introductory Elements

Chapter 1. Scope

The Trial Use Specification defines components which are not required parts of the LSB Specification.

As of version 4.1 there are no specified elements in Linux Standard Base Trial Use Specification.

Chapter 2. Normative References

The specifications listed below are referenced in whole or in part by the Trial Use Specification. Such references may be normative or informative; a reference to specification shall only be considered normative if it is explicitly cited as such. The Trial Use Specification may make normative references to a portion of these specifications (that is, to define a specific function or group of functions); in such cases, only the explicitly referenced portion of the specification is to be considered normative.

Chapter 3. Requirements

None as of this version.

Chapter 4. Terms and Definitions

For the purposes of this document, the terms given in ISO/IEC Directives, Part 2, Annex H and the following apply.


Some LSB specification documents have both a generic, architecture-neutral part and an architecture-specific part. The latter describes elements whose definitions may be unique to a particular processor architecture. The term archLSB may be used in the generic part to refer to the corresponding section of the architecture-specific part.

Binary Standard, ABI

The total set of interfaces that are available to be used in the compiled binary code of a conforming application, including the run-time details such as calling conventions, binary format, C++ name mangling, etc.


Describes a value or behavior that is not defined by this document but is selected by an implementor. The value or behavior may vary among implementations that conform to this document. An application should not rely on the existence of the value or behavior. An application that relies on such a value or behavior cannot be assured to be portable across conforming implementations. The implementor shall document such a value or behavior so that it can be used correctly by an application.

Shell Script

A file that is read by an interpreter (e.g., awk). The first line of the shell script includes a reference to its interpreter binary.

Source Standard, API

The total set of interfaces that are available to be used in the source code of a conforming application. Due to translations, the Binary Standard and the Source Standard may contain some different interfaces.


Describes the nature of a value or behavior not defined by this document which results from use of an invalid program construct or invalid data input. The value or behavior may vary among implementations that conform to this document. An application should not rely on the existence or validity of the value or behavior. An application that relies on any particular value or behavior cannot be assured to be portable across conforming implementations.


Describes the nature of a value or behavior not specified by this document which results from use of a valid program construct or valid data input. The value or behavior may vary among implementations that conform to this document. An application should not rely on the existence or validity of the value or behavior. An application that relies on any particular value or behavior cannot be assured to be portable across conforming implementations.

In addition, for the portions of this specification which build on IEEE Std 1003.1-2001, the definitions given in IEEE Std 1003.1-2001, Base Definitions, Chapter 3 apply.

Chapter 5. Documentation Conventions

Throughout this document, the following typographic conventions are used:


the name of a function


the name of a command or utility


a constant value


a parameter


a variable

Throughout this specification, several tables of interfaces are presented. Each entry in these tables has the following format:


the name of the interface


An optional symbol version identifier, if required.


A reference number indexing the table of referenced specifications that follows this table.

For example,

forkpty(GLIBC_2.0) [SUSv3]

refers to the interface named forkpty() with symbol version GLIBC_2.0 that is defined in the SUSv3 reference.

Note: For symbols with versions which differ between architectures, the symbol versions are defined in the architecture specific parts of ISO/IEC 23360 only.

II. Trial Use Module

Table of Contents
6. Trial Use Module
6.1. Introduction

Chapter 6. Trial Use Module

6.1. Introduction

The Trial Use Module decribes components in Trial Use status. Trial Use Specifications are non-mandatory components of the Linux Standard Base.

As of version 4.1 there are no specified elements in this module.

Appendix A. GNU Free Documentation License (Informative)

This specification is published under the terms of the GNU Free Documentation License, Version 1.1, March 2000

Copyright (C) 2000 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.


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A.12. How to use this License for your documents

To use this License in a document you have written, include a copy of the License in the document and put the following copyright and license notices just after the title page:

Copyright (c) YEAR YOUR NAME. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with the Invariant Sections being LIST THEIR TITLES, with the Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST. A copy of the license is included in the section entitled "GNU Free Documentation License".

If you have no Invariant Sections, write "with no Invariant Sections" instead of saying which ones are invariant. If you have no Front-Cover Texts, write "no Front-Cover Texts" instead of "Front-Cover Texts being LIST"; likewise for Back-Cover Texts.

If your document contains nontrivial examples of program code, we recommend releasing these examples in parallel under your choice of free software license, such as the GNU General Public License, to permit their use in free software.