MiniShell

This is a basic command-line shell implemented in C++ that demonstrates how system calls like fork(), execvp(), and wait() work under the hood. It serves as an educational project for understanding process creation and management in Unix-like operating systems.

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Uptil these things have been implemented:

1. Input Parsing.
2. Process creation.
3. Parent and Child Process Handling.
4. Built-in Commands like cd and history.
5. Command Chaining using ; , && , ||
6. IO redirection from terminal to file. Read more about here

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Terminologies related what I have done till now:

1. Parent Process: A process that initiates the creation of another process. By default , init() is the utlimate parent process in a UNIX-based OS.

2. Child Process: A process created by another process (the parent process), allowing multi-processing and efficient resource management in operating systems.

3. Zombie Process: A child process becomes a zombie process when it has terminated but its parent process has not waited for it, and hence its status is not yet cleaned in the PCB.

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System Calls used till now:

1. fork() : Creates a new child process by duplicating the current (parent) process.

2. exeecvp() : Replaces the current process image with a new program.

3. wait() : Pauses the parent process until any one child process terminates.

4. chdir() : Changes the current working directory of the calling process.

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Built-in Commands / Shell primitve commands that are implemented

cd history

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Commands to run:

1.    make
   

2.    ./miniShell
   

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