Minishell

A UNIX shell — processes, pipes, redirections, signals

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

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

01Complete UNIX command interpreter
02Pipe and redirection handling
03Environment variables and signals
04Built-ins: echo, cd, pwd, export, unset, env, exit
05Command history
06Robust parsing with error handling

Screenshots

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