ishell

A Unix shell built from scratch in C, as a learning project.

Platform

Linux only. The shell relies on POSIX APIs (fork, execvp, pipe, dup2, waitpid) that are not available on Windows, and are not guaranteed on macOS.

Build

make

Requires gcc and make. Use make clean to remove build artifacts.

Run

./ishell

Features

• REPL loop with a prompt
• Builtin commands: echo, exit, type
• Execute any program on the $PATH
• I/O redirection: >, >>, <, 2>
• Piping: cmd1 | cmd2
• Multi-command pipelines: a | b | c
• Single and double quote parsing
• Background processes with &