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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