UNIX Implementation

ABSTRACT

This paper describes in high-level terms the implementation of the resident UNIXkernel. This discussion is broken into three parts. The first part describes how the UNIXsystem views processes, users, and programs. The second part describes the I/O system. The last part describes the UNIXfile system.

Table of Contents

• 1. INTRODUCTION
• 2. PROCESS CONTROL
  • 2.1. Process creation and program execution
  • 2.2. Swapping
  • 2.3. Synchronization and scheduling
• 3. I/O SYSTEM
  • 3.1. Block I/O system
  • 3.2. Character I/O system
    • 3.2.1. Disk drivers
    • 3.2.2. Character lists
    • 3.2.3. Other character devices
• 4. THE FILE SYSTEM
  • 4.1. File system implementation
  • 4.2. Mounted file systems
  • 4.3. Other system functions