June 2005
Intermediate to advanced
960 pages
23h 41m
English
book
Advanced Programming in the UNIX® Environment: Second Edition
by W. Richard Stevens, Stephen A. Rago
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Chapter 13. Daemon Processes
Introduction
Daemons are processes that live for a long time. They are often started when the system is bootstrapped and terminate only when the system is shut down. Because they don’t have a controlling terminal, we say that they run in the background. UNIX systems have numerous daemons that perform day-to-day activities.
In this chapter, we look at the process structure of daemons and how to write a daemon. Since a daemon does not have a controlling terminal, we need to see how a daemon can report error conditions when something goes wrong.
For a discussion of the historical background of the term daemon as it applies to computer systems, see Raymond [1996].
Daemon Characteristics
Let’s look at some common system daemons ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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