(standards.info)Program Behavior


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4 Program Behavior for All Programs
***********************************

This chapter describes conventions for writing robust software.  It
also describes general standards for error messages, the command line
interface, and how libraries should behave.

* Non-GNU Standards
We consider standards such as POSIX; we don't "obey" them.
* Semantics
Writing robust programs.
* Libraries
Library behavior.
* Errors
Formatting error messages.
* User Interfaces
Standards about interfaces generally.
* Graphical Interfaces
Standards for graphical interfaces.
* Command-Line Interfaces
Standards for command line interfaces.
* Option Table
Table of long options.
* Memory Usage
When and how to care about memory needs.
* File Usage
Which files to use, and where.

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