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CL020 - Advanced Linux and UNIX Programming

Course Description: In-depth training for software developers on Linux and UNIX system programming facilities. Learn how to develop sophisticated multiprocess applications using system calls and library routines.

Audience: Application developers who will be writing advanced programs on Linux and UNIX.

Prerequisites: Fundamentals of UNIX or Fundamentals of Linux, C Programming, and Advanced C Programming. Strong C programming skills are required for this course.

Course Contents

UNIX Standards

  • Brief History of UNIX
  • AT&T and Berkeley UNIX Systems
  • Major Vendors
  • What is a Standard?
  • What is POSIX?
  • Other Industry Specs and Standards
  • Files and Directories

  • The POSIX.1 Basic File Types
  • File Descriptions
  • Keeping Track of Open Files
  • File Table Entries
  • The v-node Structure
  • The fcntl Function
  • File Attributes
  • The access Function
  • Link, unlink, remove, and rename Functions
  • Functions to Manipulate Directories
  • System I/O

  • Standard I/O vs System I/O
  • System I/O Calls
  • File and Record Locking
  • Processes

  • What is a Process?
  • Process Creation and Termination
  • Process Memory Layout
  • Dynamic Memory Allocation
  • Accessing Environment Variables
  • Real and Effective User IDs
  • Process Management

  • Programs versus Processes
  • The fork() System Function
  • Parent and Child
  • The exec System Function
  • Current Image and New Image
  • The wait() and waitpid() Function
  • Interpreter Files and exec
  • Pipes - Basic IPC

  • Interprocess Communication
  • FIFOs
  • More on FIFO's
  • Signals

  • What is a Signal?
  • Types of Signals
  • Signal Action
  • Blocking Signals from Delivery
  • The sigaction() Function
  • Signal Sets and Operations
  • Sending a Signal to Another Process
  • Blocking Signals with sigprocmask()
  • Scheduling and Waiting for Signals
  • Restarting System Calls (SVR4)
  • Signals and Reentrancy
  • Overview of Client/Server Programming

  • Designing Distributed Application
  • Clients and Servers
  • Ports and Services
  • Server Types
  • Stateless vs. Stateful Servers
  • Concurrency Issues
  • The Berkeley Sockets API

  • Berkeley Sockets
  • Data Structures of the Sockets API
  • Socket System Calls
  • Generic Client/Server Models
  • Sample Socket-based Client
  • Algorithms and Issues in Client Design

  • Algorithms Instead of Details
  • Client Architecture
  • Sockets Utility Functions
  • TCP Client Algorithm

  • TCP Client Implementation
  • UDP Client Algorithm
  • UDP Client Implementation
  • Server Design

  • Iterative Servers
  • Concurrent Servers
  • Performance Consideration
  • An Iterative Server Design
  • A Concurrent Server Design
  • System V Interprocess Communication

  • System V IPC
  • The Three System V IPC Facilities
  • Common Operation - Get (IPCget)
  • Common Operation - Control (IPCctl)
  • Calls to Operate on the Facilities
  • Commonalities between msg, sem, and shm
  • IPC via Message Queues
  • IPC via Shared Memory Segments
  • Coordinating the Use of Shared Memory
  • Semaphore Sets-semget() and semctl() Calls
  • Semaphore Sets - the semop() calls
  • Shared Memory Coordination Using Semaphores
  • IPC Facility Handling ipcs and ipcrm
  • Date and Time Functions

  • Time Representations
  • Decoding Calendar Time
  • Shorthand Functions - asctime(), ctime()
  • Formatting Calendar Time Shared
  • Process Times
  • The Difference Between clock() and times()
  • Berkeley High resolution Timers
  • Standard I/O

  • I/O Calls to manipulate streams
  • I/O Calls which perform character I/O
  • I/O Calls which perform string I/O
  • I/O Calls which perform formatted I/O
  • I/O Calls which perform binary I/O

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