CS 3733 Operating Systems, Fall 2004 Recitation Session 1

Week of August 30.
Recitations will meet in the Linux Lab, 3.01.04 SB.
The purpose of this session is to make you familiar with the Linux Lab environment.

• Log on to your account in the Linux Lab.
• Set up the windowing environment to your liking.
• Make sure you have a cs3733 directory somewhere in your account.
• Create a Rec01 subdirectory.
• Access the USP web site: /usp
• Click on the Programs link.
• Download the (uncompressed) tar file for chapter 5.
• Untar the files into your Rec01 directory.
• Run the convertlinux script to modify the makefile.
• Compile all of the programs from Chapter 5 of USP by executing make.
• Execute the program
  
  printaccesstest .
  
  This should show the access time for the files in this directory..
• Read pages 154 and 155 of USP starting with section 5.2.1.
  You can find these pages online here.
  
• Copy printaccess.c into get_modify_time.c.
  Modify get_modify_time.c so that the name of the function is get_modify_time.
  Instead of printing information, this function will return a time_t which is the st_mtime field of the structure.
  The function does not perform any I/O.
  If the call to stat fails, the function returns (time_t)-1.
  You should be able to remove stdio.h from the includes.
• Get a copy of the program test_get_modify_time.c that is available here to test your function.
  Modify the makefile to compile test_modify.c and get_modify_time.c to produce the executable test_get_modify_time.
  Run this as follows:
  
  test_get_modify_time makefile
  and convince yourself that it is working correctly.
  Compare the results with the output of ls -l.
• Make sure the TA checks off that you completed this.