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CommandShell

This project implements a simple Unix shell from scratch, designed to handle job control and support basic shell functionalities. The lab provided a practical way to learn about process management, signal handling, and interaction with the operating system.

Features

  • Job control: Built-in support for running processes in the foreground and background, listing jobs, and managing job states.
  • Signal handling: Graceful handling of SIGINT and SIGTSTP signals.
  • Trace-driven testing: Verified against various scenarios using predefined trace files.

Project Files

Core Files

  • Makefile: Automates the compilation of the shell program and runs tests to validate its functionality.
  • README.md: This file, detailing the project structure and functionality.
  • tsh.c: The main source file for the shell program.

Testing and Utilities

  • sdriver.pl: A trace-driven testing driver for the shell program.
  • trace*.txt: A set of 15 trace files designed to simulate and test various shell interactions.
  • tsh.out: Sample outputs from test runs.

Helper Programs

  • myspin.c: Spins for a user-defined number of seconds, simulating a long-running process.
  • mysplit.c: Forks a child process that spins for a user-defined number of seconds.
  • mystop.c: Spins for a user-defined number of seconds and then sends SIGTSTP to itself.
  • myint.c: Spins for a user-defined number of seconds and then sends SIGINT to itself.

How to Use

  1. Clone this repository: 
    git clone https://github.com/LALITH0110/CommandShell
cd <repository-directory>
  2. Compile the shell program: 
    make
  3. Run the shell: 
    ./tsh