https://github.com/asut00/minishell
UNIX shell implemented in C, featuring robust command execution, piping, redirection, and environment variable handling, designed to replicate core shell functionalities.
https://github.com/asut00/minishell
Last synced: 5 months ago
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UNIX shell implemented in C, featuring robust command execution, piping, redirection, and environment variable handling, designed to replicate core shell functionalities.
- Host: GitHub
- URL: https://github.com/asut00/minishell
- Owner: asut00
- Created: 2024-11-13T11:10:01.000Z (8 months ago)
- Default Branch: main
- Last Pushed: 2024-11-13T11:55:34.000Z (8 months ago)
- Last Synced: 2024-12-27T08:16:55.834Z (7 months ago)
- Language: C
- Homepage:
- Size: 42 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Minishell 🐚
**Minishell** is a minimalistic shell implementation in C, built to replicate many features of a standard UNIX shell. This project offers hands-on experience with process creation, signal handling, file redirection, and other essential shell operations.
## Table of Contents
- [Project Overview](#project-overview)
- [Key Features](#key-features)
- [Installation](#installation)
- [Usage](#usage)
- [Shell Commands Supported](#shell-commands-supported)
- [Author](#author)
## Project Overview
As part of the [42 School](https://42.fr/) curriculum, **Minishell** introduces the core concepts behind UNIX-like shells. It is designed to run in a terminal environment and interpret user commands, manage processes, and handle I/O redirection.
The project challenges are:
- Manage processes (using `fork`, `exec`, and `wait`).
- Parse and interpret user input.
- Implement built-in shell commands.
- Handle signals for job control (like `CTRL-C`, `CTRL-D`, and `CTRL-\`).
## Key Features
**Minishell** includes:
- Basic command execution with path resolution.
- Built-in commands: `echo`, `cd`, `pwd`, `export`, `unset`, `env`, and `exit`.
- Single and double quotes handling to parse complex command structures.
- Environment variable expansion.
- Basic redirections (`<`, `>`, `>>`) and pipes (`|`).
- Here-document (`<<`) support for multi-line input.
- Signal handling for interactive input (e.g., handling `CTRL+C`).
## Installation
To set up **Minishell**, follow these steps:
1. **Clone the repository**:
```bash
git clone https://github.com/asut00/minishell.git
cd minishell
```
2. **Compile the program**:
```bash
make
```
3. This command generates an executable called `minishell` in the root of the project.
`/!\` You might need to install the readline library and replace the RDL_INC (path to readline include directory) and RDL_LIB (path to readline lib directory) by yours in the Makefile.
## Usage
Launch **Minishell** by running the executable:
```bash
./minishell
```
Once started, you can use it similarly to a standard shell. **Minishell** will interpret each line of input, execute commands, and display the output in the terminal.
Examples:
```bash
# Basic commands
minishell> ls -l
total 224
-rw-r--r-- 1 asut staff 3497 13 nov 12:39 Makefile
drwxr-xr-x 3 asut staff 96 13 nov 12:30 inc
-rwxr-xr-x 1 asut staff 102808 13 nov 12:40 minishell
drwxr-xr-x 12 asut staff 384 13 nov 12:31 src
minishell> echo "Hello, Minishell!"
Hello, Minishell!
# Environment variables
minishell> export VAR="42"
minishell> echo $VAR
42
# Using pipes and redirection
minishell> cat file.txt | grep "searched_term" > result.txt
# > will create the result.txt file including the lines containing the "searched_term"
```
## Shell Commands Supported
**Minishell** supports the following commands, either as built-ins or by executing system commands:
| Command | Description |
|-----------|---------------------------------------|
| `echo` | Print arguments to the standard output |
| `cd` | Change the current directory |
| `pwd` | Print the current working directory |
| `export` | Set an environment variable |
| `unset` | Unset an environment variable |
| `env` | Display all environment variables |
| `exit` | Exit the shell |
Additionally, **Minishell** supports external commands found in the system's `$PATH`.
## Author
- GitHub: [@asut00](https://github.com/asut00)
- 42 Intra: `asuteau`