Unix Shell Clone

This project is a simple clone of a Unix shell, designed to demonstrate the basic functionalities of command interpretation, process spawning, and execution control. It is implemented in C and can be compiled using GCC or any standard C compiler.

Commands

Once you have compiled and ran the shell, you can use the following example commands:

• A blank line.
• cd <dir> Note: You can specify a program by either an absolute path, a relative path, or base name only. Thus, cd is not the only way to locate programs.
• exit
• /usr/bin/ls -a -l
• cat shell.c | grep main | less
• cat < input.txt
• cat > output.txt
• cat >> output.txt
• cat < input.txt > output.txt
• cat < input.txt >> output.txt
• cat > output.txt < input.txt
• cat >> output.txt < input.txt
• cat < input.txt | cat > output.txt
• cat < input.txt | cat | cat >> output.txt
• etc.

Ctrl-C or Ctrl-Z signals do noot terminate or suspend the shell.

Prereqs

Before running this program, have the following installed:

• GCC (GNU Compiler Collection) or other C compiler
• GNU Make

Installing

To compile the shell:

1. Clone this repo to your local machine using git clone, or download & extract ZIP file.

2. Navigate to the directory containing the project files.

3. Run the following command to build the shell:

   make

This will compile the source code and generate an executable named nyush.

Running the Shell

After compilation, you can start the shell by executing:

./nyush