FILE-SYSTEM INTERFACE

File Concept

File Structure

Can simulate last two with first method by inserting appropriate control characters.

File Operations

Access Methods

Directory Structure - a collection of nodes containing information about all files.

Organize the directory (logically) to obtain:

Single-Level Directory - a single directory for all users.

Two-Level Directory - separate directory for each user.

Tree-Structured Directories

Acyclic-Graph Directories - have shared subdirectories and files.

General Graph Directory

Protection

Access Lists and Groups