---

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
• Writing Robust Programs
• Library Behavior
• Formatting Error Messages
• Standards for Interfaces Generally
• Finding the Program’s Executable and Associated Files
• Standards for Graphical Interfaces
• Standards for Command Line Interfaces
• Standards for Dynamic Plug-in Interfaces
• Table of Long Options
• OID Allocations
• Memory Usage
• File Usage