IEEE 9945-2-1993
Portable Operating System Interface (POSIX(R)) -- Part 2: Shell and Utilities
Available Formats:
- Availability: Immediate Download
- Language: English
- License Type: Single User
- Updates: Not Included
- Availability: Request Quote
- Language: English
- License Type: Enterprise / Multi User
- Updates: Included
About This Item
9945-2-1993 is a computing and processing standard for the Portable Operating System Interface (POSIX(R)) framework, focused on shell and utilities behavior. It defines expectations for command interpretation, common utility functions, and related operating system interfaces that help software behave consistently across compliant environments. For developers, integrators, and procurement teams, this standard matters because it supports portability, predictable scripting, and more reliable system-level operation in Unix-like technical environments.
About 9945-2-1993
This standard is part of the POSIX family and addresses the shell and utilities component of the interface specification. In practical terms, 9945-2-1993 sets out how command-line tools and shell features should operate so that programs, scripts, and administrative workflows can be moved between systems with fewer changes. Its technical context is computing and processing, with emphasis on consistent behavior rather than application-specific features. As a superseded document, it is mainly relevant for legacy compliance, historical reference, and compatibility review.
Where is 9945-2-1993 used?
9945-2-1993 is typically used in environments that depend on shell scripting, command-line automation, and portable utilities across operating systems. That can include software development tools, system administration workflows, embedded or multi-platform computing platforms, and technical installations where consistent command behavior is important. It is especially useful where scripts must run with minimal modification across POSIX-aligned systems. In these settings, the standard helps define a common baseline for shell-driven operations and utility invocation.
Importance in practice
In practice, 9945-2-1993 supports consistency in design, testing, and operational support for software that relies on shell and utility behavior. Clear interface expectations can reduce integration risk, limit portability issues, and make compliance checks more straightforward during procurement or system validation. For teams maintaining older environments, the standard can also help compare implementations and identify where command-line behavior may differ. That makes it a useful reference when reliability and predictable execution are important.
- POSIX shell behavior
- Standard command utilities
- Portable scripting support
- System interface consistency
- Legacy compliance reference
- Publication Date: 1993
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Computing and Processing
- Official IEEE: Doi link
Please request information about the document. Contact Page
Need This Standard?
Request a personalized quote today to receive the latest edition in PDF or other available formats.
Need This Standard?
Request a personalized quote today to receive the latest edition in PDF or other available formats.
Summarize with AI
Get quick summaries using your favorite AI engine.
Online Standart Disclaimer
OnlineStandart.com is an authorized reseller of international standards, operating through partnerships with authorized distributors. We do not own the copyrights or trademarks of the standards we sell, including but not limited to those of API, ASHRAE, BSI, SAE, ASTM, IEEE, IEC, ASME, ISO, and others.
All product names, logos, and brands are the property of their respective owners and are used for identification purposes only; their use does not imply endorsement. OnlineStandart.com is not affiliated with or endorsed by any standards development organization unless explicitly stated. The content of this document is for informational purposes only and is intended to promote our licensed reselling services.
Online Standart does not host, distribute, or link to free, unlicensed, or uncertified copies of copyrighted standards. Every document we deliver is a licensed copy obtained through authorized channels and supplied with full licensing documentation. The “Free PDF Download” option on our product pages refers to this free informational document — never to a free copy of any standard.