Homework 3, More Chapter 3.

Goals

• Demonstrated your understanding of some basic system calls.
• Explored a os-related platform.
• Strengthened your knowledge of process related items.

Formal Description

1. [10 points] Using the code examples provided, write a program that will fill an array with data using two processes.
   • Set up a shared memory segment of 20 characters.
   • Create a child process which will:
     • fill all odd locations (1, 3, 5, ... ) in the array with the letter 'c'.
     • exit
   • The parent should:
     • fill all even locations (0, 2, ...) in the array with the letter 'p'
     • wait for the child to exit
     • print the contents of the array (index:value, one per line)

       0:p
       1:c
       ...
       19:c 

     • clean up shared memory
     • exit
   I intend you to use the example provided in class, it should be an easy adaptation.

   Place the source code for this program in Homework 3: Code

2. In a word document answer the following:
   1. [6 points] Describe the different states of the life cycle of a process.
   2. [2 points] What is an orphan process?
   3. [2 points] What is a zombie process?
   4. [4 points] What is the significance of fork using copy on write for memory allocation after the fork occurs?
   5. [6 points] Describe the two different high level IPC mechanisms.
   6. [10 points] Look at wine.
      • Discuss Wine as it relates to this class.
      • Possible discussion points. (But you may address others as well)
        • Is Wine an OS, emulator, library, loader, ...?
        • What OS like services does Wine provide?
        • What OS like services does Wine fail to provide?

Required Files

Submission

• Submit the word document to the D2L file Homework 3
• Submit the c/c++ document to the D2L file Homework 3 Code.