simple-shell

A minimal interactive shell written in C. Provides a simple prompt showing the current working directory, tokenizes input on whitespace, supports a few built-in commands, and launches external programs using fork + exec.

Features

• Built-in commands: echo, env, exit.
• Executes external commands with arguments via fork and execvp.
• Displays current working directory in the prompt.

Usage examples

• Start the shell:

./shell

• Built-ins:

/> echo hello world
hello world

/> env
PATH=/usr/bin:... (environment variables listed)

/> exit 2

• Run external commands:

/> ls -la /tmp
(output of ls)

Build

• Requirements: gcc (or compatible C compiler)
• Compile with:

gcc -Wall -Wextra -std=c11 star.c builtin.c utils.c -o shell

• Run:

./shell

License: none

simple-shell