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The GNU C Library

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27. Job Control

Job control refers to the protocol for allowing a user to move between multiple process groups (or jobs) within a single login session. The job control facilities are set up so that appropriate behavior for most programs happens automatically and they need not do anything special about job control. So you can probably ignore the material in this chapter unless you are writing a shell or login program.

You need to be familiar with concepts relating to process creation (see section 26.2 Process Creation Concepts) and signal handling (see section 24. Signal Handling) in order to understand this material presented in this chapter.

27.1 Concepts of Job Control  Jobs can be controlled by a shell.
27.2 Job Control is Optional  Not all POSIX systems support job control.
27.3 Controlling Terminal of a Process  How a process gets its controlling terminal.
27.4 Access to the Controlling Terminal  How processes share the controlling terminal.
27.5 Orphaned Process Groups  Jobs left after the user logs out.
27.6 Implementing a Job Control Shell  What a shell must do to implement job control.
27.7 Functions for Job Control  Functions to control process groups.

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