https://github.com/minightdev/simple_shell

A custom shell implemented in C that supports executing commands, handling environment variables, and built-in commands like setenv, unsetenv, exit, and echo. It provides a basic interactive shell interface where you can enter commands and receive output.
https://github.com/minightdev/simple_shell

c-lang custom-shell shell

Last synced: 9 months ago
JSON representation

A custom shell implemented in C that supports executing commands, handling environment variables, and built-in commands like setenv, unsetenv, exit, and echo. It provides a basic interactive shell interface where you can enter commands and receive output.

• Host: GitHub
• URL: https://github.com/minightdev/simple_shell
• Owner: MinightDev
• Created: 2023-08-15T17:18:53.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2023-08-24T01:11:38.000Z (over 2 years ago)
• Last Synced: 2025-04-07T23:13:26.944Z (12 months ago)
• Topics: c-lang, custom-shell, shell
• Language: C
• Homepage:
• Size: 29.3 KB
• Stars: 6
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Authors: AUTHORS

Awesome Lists containing this project

README

          
# Custom Shell

A custom shell implemented in C that supports executing commands, handling environment variables, and built-in commands like `setenv`, `unsetenv`, `exit`, and `echo`. It provides a basic interactive shell interface where you can enter commands and receive output.

## Features

- Execute external commands and handle built-in commands.

- Environment variable management with `setenv` and `unsetenv` commands.

- Handle special environment variables like `$?` and `$$`.

- Replace environment variables in strings using the `$` syntax.

- Basic error handling and memory management.

## Usage

The custom shell supports basic shell commands and built-in commands. You can execute external commands and use the built-in commands by typing them into the shell.

## Compiling

To compile the shell, run

```bash

gcc -Wall -Werror -Wextra -pedantic -std=gnu89 *.c -o hsh

```

Example of built-in commands:

- `echo [text]`: Display text to the console.

- `setenv [variable] [value]`: Set or update an environment variable.

- `unsetenv [variable]`: Remove an environment variable.

- `exit [status]`: Exit the shell with an optional status code.

To execute external commands, simply type the command name followed by any required arguments.

## Notes

- Built-in commands are handled within the shell program.

- Environment variable expansion is supported using `$VARNAME` syntax.

Feel free to explore this custom shell implementation according to your needs!