27.6 Implementing a Job Control Shell

This section describes what a shell must do to implement job control, by presenting an extensive sample program to illustrate the concepts involved.

• Data Structures: Introduction to the sample shell.
• Initializing the Shell: What the shell must do to take responsibility for job control.
• Launching Jobs: Creating jobs to execute commands.
• Foreground and Background: Putting a job in foreground of background.
• Stopped and Terminated Jobs: Reporting job status.
• Continuing Stopped Jobs: How to continue a stopped job in the foreground or background.
• Missing Pieces: Other parts of the shell.