This article is excerpted from Chapter 7 of my book Linux Programming by Example: The Fundamentals, published by Prentice Hall (ISBN: 0-13-142964-7). Chapters 1 through 6 cover the standard APIs for argument parsing, dynamic memory management, file and directory access, retrieving file information (stat(), lstat()), working with users and groups and also date and time information and sorting.
Link: linuxjournal.com
