fortsh Documentation

Welcome to the fortsh documentation. fortsh is a modern, POSIX-compliant shell written in Fortran 2018 with fish-like features.

Quick Links

• Installation - Get fortsh running on your system
• First Steps - Basic usage and commands
• Configuration - Customize your shell

Features

fortsh combines POSIX compliance with modern shell conveniences:

• 3,776 POSIX compliance tests passing - Full shell compatibility
• Fish-like autosuggestions - History-based suggestions as you type
• Real-time syntax highlighting - Commands validated and colored instantly
• 60+ builtin commands - Including bash extensions
• ~99% bash compatibility - Arrays, associative arrays, parameter expansion
• Tab completion - Fuzzy matching and programmable completions

Getting Help

• Browse the sidebar for specific topics
• Check Platform Notes for system-specific information
• Report issues on GitHub

About

fortsh is a single-maintainer project. It demonstrates that Fortran can be used effectively for systems programming while providing a practical, feature-rich shell.