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Old 12-15-2007, 08:57 AM   #1
jCash
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newbie: Reason for daemon


Why would you want to have a program as a daemon, so you can start and stop it, without having to try to find the pid and killing the program?

I have a program that need to be started by cron and I am not sure if I have to make it a daemon.
 
Old 12-15-2007, 10:19 AM   #2
kzutter
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Sometimes it is desirable to have program run continuously in the background. This is daemon mode. Most daemons sit quietly, waiting for some kind of event, such as a network request.
 
Old 12-15-2007, 10:44 AM   #3
bsdunix
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Any process running in the background or foreground has a PID whether that process is short or long lived.

A "daemon" is just a name associated with service programs that run in the background that typically perform a function (DNS, DHCP, HTTP, etc.)

CRON can start service programs as well as the typical timed event short lived script task.

So, if your program will perform a service and will need to stay long lived, then consider it a daemon. If on the other hand it will perform a short lived process, then it's a task.

Daemon (computer software)
http://en.wikipedia.org/wiki/Daemon_(computer_software)

Last edited by bsdunix; 12-15-2007 at 07:31 PM.
 
  


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