psh: A Fancy POSIX-like Shell

This project is a custom implementation of a shell written in C. It aims to achieve all the features of a POSIX-compliant shell. It is part of the TILDE 3.0 mentored program where 5 students worked on this project under the mentorship of 3 mentors.

Contributors:

• Aditya R
• Krishna Kumar
• Alayna Monteiro
• Sumithra Suresh
• Sidhartha Rao

Mentors:

• Nathan Paul
• Tejas R
• Anupam G

Progress by End of Week 1:

We have implemented the basic structure of a shell and execution of some built-in and other external commands.

Current Workflow:

1. Read Input: Read an input from the user.
2. Tokenize: Tokenize the input with " " as a delimiter.
3. Command Execution:
   • Check whether the first token is a built-in or external command.
   • Call the corresponding function and return the result.
4. Loop: Go back to reading an input infinitely until exit is called.

Future Work:

• Create functions for all built-in commands.
• Extensively debug all functions with all possible arguments and flags.
• Handle signals and arrow keys.
• Add tab completion.

How to Build and Run:

cd psh
make run