LBE-OperatingSystem

LBE-OS is a repo full of code snippets to help you complete your OS labs.

A few things to point out :

• Though I did my best, I might have done some mistakes along the way, let me know AND/OR contribute to fix them!
• Think there would be more interesting things to add in there, feel free to add them OR request that I do a quick example.
• Without sharing, we won't go anywhere! Contribute! Go Open! Drink tea.

David Albertson

Execution

To run any code example in a Linux environment (I use ubuntu) do the following :

1. Compile any .cpp file :

gcc 01fork.cpp -o output

For the Thread section you need to add the -pthread flag

2. Execute the corresponding output file :

./output

Content

Process

• Basics
  • 01fork.cpp - Creating a new process
  • 02waitpid-basic.cpp - Wait for a given process to terminate
  • 02waitpif-elaborated.cpp - Wait for a given process to terminate and retrieve signal or exit value
  • 03waitpid-nonBlocking.cpp - Wait for a given process to terminate without blocking the parent process
  • 04wait.cpp - Wait for all process to terminate
• Execution
  • 01execve.cpp - Replacing the child process image by a new one
  • 02execlp.cpp - Replacing the child process image by a new one
  • 03execvp.cpp - Replacing the child process image by a new one
  • 04exec-example.cpp - Replacing the child process image by a new one using a user created executable
  • 05execWait-example.cpp - Replacing the child process image by a new one and wait for the child process to terminate before terminating the parent process
• IPC
  • 01pipe.cpp - Communication using a pipe and file descriptors (parent process writing to child process)
  • 02pipe-interProc-basic.cpp - Communication between 2 process using a pipe and file descriptors
  • 02pipe-interProc-elaborated.cpp - Communication between 2 process (using a user created executable and passing fd as arguments)
  • 03pipe-twoWayComm.cpp - Communication using a pipe and file descriptors (two way communication)

Threads

• Basics
  • 01thread.cpp - Launching threads for specific task
  • 02thread-arguments.cpp - Passing arguments to threads
  • 03thread-multipleTask.cpp - Clean way of launching multiple threads
• Synchonization
  • 01mutex.cpp - Basic synchonization using mutex (binary semaphores)
  • 02semaphore-prodCons.cpp - Synchronization using semaphore. An example of the producer - consumer problem

Changelogs

TOD.

FIFO coming soon.

References

• Die.net - Linux Doc
• A short introduction to operating systems, by Mark Burgess
• Google's CPP coding guideline