Assignment #1

CS230/330 - Operating Systems (Spring 1999).

Due : Friday, April 2, 5:00 p.m.

Overview

The purpose of this assignment is to get a class account and to familiarize yourself with the compiler, makefiles, and CVS. Please refer to the class handouts for details.

Class Accounts

Come to my office in Ryerson 257B to introduce yourself and get a Unix account on "cs230.cs.uchicago.edu". This is a dedicated machine that will be used for this class.

Hello World

After getting your account, login and do the following:

Create a directory "assign1"
Write a program "hello.c" that prints the text "Hello World" on the screen. Make sure your program is in the assign1 directory and that it compiles and runs.
Create a Makefile that compiles your hello.c program into an executable called hello. If successful, you should be able to simply type 'make' to build your program.
Clean up your "assign1" directory so that "hello.c" and "Makefile" are the only two files.
Import the "assign1" directory into your CVS repository using the 'cvs import' command. Your account should already have a CVSROOT directory initialized for your use. Refer to the handouts on CVS for details on how to do this. Do not delete or modify any files in the CVSROOT directory.
Delete the assign1 directory (and hold your breath).
Type 'cvs checkout assign1'. If you've done everything correctly, your previously deleted directory should reappear with both files in it. If not, well, you'll have to start over.
Change the file 'hello.c' to print "Hello There" instead of "Hello World."
Create a new file 'bye.c' that contains a function bye(). This function should print the text "Goodbye" on the screen.
Modify the file 'hello.c' to call the bye() function after printing the "Hello There" message.
Modify the makefile to compile both hello.c and bye.c into a single executable called 'hello'.
Compile your code to make sure it works. The output should look something like this:
```
% hello
Hello There
Goodbye
% 
```
Add the bye.c file to the CVS repository by typing "cvs add bye.c".
Commit all of your changes back to the CVS repository using the "cvs commit" command.
You're done. You have successfully used a revision control system.

Handin procedures

All projects in this class must be checked into CVS as described above. To make sure all of your files are up to date, type the following:

% cvs commit -m "Final handin" assign1

This will scan the assign1 directory and check in all of the updated files. You may also wish to double-check your assignment by going to a new directory and performing a test like this:

% cd Test
% cvs checkout assign1
% cd assign1
% make
% hello
Hello There
Goodbye
%

Once your assignment has been checked into CVS, you are done. Your assignment will be automatically collected from the repository after the due-date has passed. If you have not committed your program files to the repository before they are collected, you will receive no credit!.