Custom Shell in C

A simple, yet powerful command-line shell implemented in C, designed to mimic basic functionalities of a Unix/Linux bash terminal. This project demonstrates proficiency in C programming, system calls, process management, and command parsing.

🧑‍💻 About the Project

This shell program allows users to execute commands interactively from the terminal. It supports:

Executing system commands with arguments. Built-in commands like cd, exit, and help. Handling multiple commands separated by semicolons. Background process execution using &. Basic input/output redirection (>, <). Signal handling for Ctrl+C (SIGINT) to safely terminate foreground processes.

🔧 Key Features & Skills Demonstrated

Process Management: Using fork(), execvp(), and waitpid() to create and manage child processes. Command Parsing: Tokenizing user input, handling arguments, and parsing special characters. File I/O & Redirection: Implementing input/output redirection with dup2() and file descriptors. Signal Handling:Managing asynchronous events with signal handlers. Memory Management: Careful use of dynamic memory allocation (malloc, free) to avoid leaks. error Handling: Robust checks for system call failures and invalid inputs.

what I Learned

This project deepened my understanding of:

Low-level system programming in C. Interaction between user-level programs and OS kernel. Writing modular, maintainable C code. Debugging with gdb and memory analysis with valgrind.