Welcome to csh, a custom shell program implemented in C! 🎉

• Command Execution 🛠️
  • Supports executing built-in and external commands.
• Redirection 🔀
  • Input and output redirection for commands.
• Alias Management 🏷️
  • Create, view, and manage command aliases.
• Modular Design 🧩
  • Organized codebase for better readability and maintainability.
• Environment Variable Initialization 🌐
  • Automatically sets the SHELL environment variable to the shell's executable path.
• Configuration File Support 📜
  • Reads and executes commands from ~/.cshrc configuration file on startup.
  • Creates a default ~/.cshrc if it doesn't exist.
• Comment Handling 📝
  • Skips lines starting with # in the configuration file.
• Cross-Platform Compatibility 🌍
  • Supports macOS (using _NSGetExecutablePath) and Linux (using /proc/self/exe).

• Configuration Appearance
• Refactor main.c
• Tab autocompletion
• Up-Down history searching

• GCC (GNU Compiler Collection)

1. Clone the repository:

   git clone https://github.com/yourusername/csh.git
   cd csh

2. Build the project using make:

   make

3. Run the shell:

   ./csh

4. Or install the shell:

   sudo make install

To clean up the generated files:

make clean

• Interactive Mode: Simply run ./csh to start the shell in interactive mode.

• Batch Mode: Provide a script file as an argument to execute commands from the file:

  ./csh script.txt

• Running a command:

  ls -l

• Redirecting output:

  ls -l > output.txt

• Creating an alias:

  alias ll='ls -l'

• main.c: Main entry point of the shell program.
• commands.c: Implementation of command execution functions.
• redirection.c: Implementation of input/output redirection.
• alias.c: Implementation of alias management.
• utils.c: Utility functions.
• fdwrite.c: Implementation of file descriptor writing functions.
• commands.h, redirection.h, alias.h, utils.h, fdwrite.h: Header files declaring functions and structures.

Contributions are welcome! Please fork the repository and submit a pull request.

This project is licensed under the MIT License - see the LICENSE file for details.

Thanks to all the contributors and open-source projects that made this possible.

Happy coding! 💻