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What is a Daemon ?
A daemon (or service) is a background process that is designed to run autonomously,with little or not user intervention. The Apache web server http daemon (httpd) is one such example of a daemon.
Basic steps to follow for daemon creation are,
- Fork off the parent process and allow parent to die.
- Change file mode mask (umask)
- Open any logs for writing
- Create a unique Session ID (SID)
- Change the current working directory to a safe place
- Close standard file descriptors
- Enter actual daemon code
A complete example is given here.?
A more detailed explanation of daemon creation steps can be found here.?
Resources :-
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