Minishell

A UNIX shell — processes, pipes, redirections, signals

A command interpreter written in C: process creation, pipe chaining, redirections, environment variables and signal handling.

Screenshots

Context

A shell is a great revealer: it forces you to properly understand `fork`, `execve`, `dup2` and `waitpid` — and above all to handle the edge cases, like a redirection that fails, a signal received while a child is running, or a command that cannot be found in the middle of a pipeline. Parsing took as much work as execution: quotes, expansions and operators have to be processed in the right order for the behaviour to match bash.

Features

Complete UNIX command interpreter
Pipe and redirection handling
Environment variables and signals
Built-ins: echo, cd, pwd, export, unset, env, exit
Command history
Robust parsing with error handling