minishell

42/Codam minishell, a simple shell based on bash

Description

A collaborative group project that has us writing our own simple little shell in C.

The shell takes single-line inputs and replicates bash behaviour.

It supports:

• redirections - <, >, and >>.
• pipes - |
• separating semicolons - ;
• single and double quotes - ' "
• escape character - \
• environment variables - $
• ctrl-C, ctrl-D, and ctrl-\

Implemented builtins:

• echo with option ’-n’
• cd with relative or absolute path, and '-'
• pwd without any options
• export without any options
• unset without any options
• env without any options and any arguments
• exit without any options

Commands

# Build
make

# Run
./minishell

Demo

Resources

Bash repo

man pages for bash commands

A guide to writing your own shell from Introduction to Systems Programming

A detailed breakdown of how the shell interprets commands

Pipes, forks, and dups - data flows explained

An explanation of shell operators

Environment variable naming conventions

Process statuses

Special exit codes (version-dependant)