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public/subjects/0-shell/job-control/README.md

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job control

Objectives

You must follow the same principles as the first subject.

Job control refers to the ability to selectively stop (suspend) the execution of processes and continue (resume) their execution at a later point.

In job control, you will have to implement the following builtins:

  • jobs
  • bg
  • fg
  • kill

You must also be able to stop jobs with the Ctrl + Z.

Instructions

  • The project has to be written in a compiled language like (C, Rust Go or other), interpreted languages like (Perl and others) are not allowed.
  • The code must respect the good practices

This project will help you learn about:

  • Job control
  • Process creation and synchronization
  • Commands syntax
  • Scripting language

Usage

student$ ./0-shell
$ ls -lRr / 2>1 >/dev/null  &
[1] 8287
$ sleep 50 &
[2] 8870
$ jobs
[1]-  Running                 ls -lRr / 2>1 >/dev/null  &
[2]+  Running                 sleep 50 &
$ jobs -l
[1]- 8287 Running                 ls -lRr / 2>1 >/dev/null  &
[2]+ 8870 Running                 sleep 50 &
$ kill 8287
[1]+  Terminated              ls -lRr / 2>1 >/dev/null
$ jobs
[2]+  Running                 sleep 50 &
$ exit
student$