Assignments for OS Course in IIIT Hyderabad

• The final assignments are usually in a folder with name as roll number like "2019101050"
• This repo has the entire commit history of the assignments

Assignments 1

• Reversing the contents of a file using System Calls
• Using stat structure to get information about a file in UNIX

Assignment 2

• Implementing your own Shell
• Reimplemented basic commands like ls, echo, pwd
• Can call binaries
• Some custom commands like pinfo and nightswatch

Assignment 3

• Adding Piping and redirection to Shell
• Adding jobs both bg and foreground
• Showing exit codes for the proccesses

Assignment 4

• Multihreading and Multiproccessing
• Mergesort implementation (multiprocess and multithread) in the first question
• Two Async models modelled using threads, locks, CVs and semaphores for the other 2 questions

Assignment 5

• Modified XV6 kernel proc structure and added system calls to support time command
• Added 3 schedulers including FCFS, MLFQ, PBS
• Added ps command and related system calls

Assignment 6

• Simple networking model of client and server over TCP connection
• Client can requests file from server which are delivered if they exist on the server