Lesson 2

Our Goals for this Lesson

Last time we looked at processes and threads, the basic units of execution in a computer system. In this lesson, we'll dive deeper into some of the specifics of process implementation in a POSIX-like system; in particular, file handling and process creation. A solid understanding of these topics will be vital for Homework 4 , where you'll be adding user processes to OS/161.

Outline

• Resource Identifiers
• File Descriptors
• PIDs, fork and waitpid
• The Joy of execv
• Key Points
• Before You Go

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