Linux Blog

Adding a service in Fedora

Filed under: Shell Script Sundays — TheLinuxBlog.com at 2:08 pm on Sunday, July 6, 2008

This week on Shell Script Sundays I’ll show you how to add a service to Fedora. This is very useful if you don’t happen to use yum for every service you want to run, and xinetd doesn’t really work for you.

Firstly there are three main parts to a Fedora service script. Start, Stop and Restart. They are pretty much self explanatory, but you don’t have to worry about the restart action since all it does is stop’s and then starts the service.

Without further ado here is the script:

#!/bin/bash
#
# Fedora-Service Update notification daemon
#
# Author:       TheLinuxBlog.com
#
# chkconfig:    1000 50 50
#
# description:  This is a test Fedora Service \
#               Second line of the fedora service template.
# processname:  FedoraTemplate
#
RETVAL=0;
 
start() {
echo "Starting Fedora-Service"
}
 
stop() {
echo "Stopping Fedora-Service"
}
 
restart() {
stop
start
}
 
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
*)
echo $"Usage: $0 {start|stop|restart}"
exit 1
esac
 
exit $RETVAL

Now that you have a template for the script, you will want to modify it for your service. You need to keep the header at the top. This is how the Fedora Knows about your service. The three numbers indicate what order the scripts should start up and shut down in. The first seems to be a identification number and the other two are the startup and shutdown order. These can be adjusted depending on when you want the service to start up.Once you are done modifying the script put the script in /etc/init.d/

To make sure it works you can call it with service using the following actions:

service start
service stop
service restart

If all of the actions work, you are ready to add the service to the system. If you use the setup command as root it seems to do this step for you, but if you just want to add the service quickly without bothering to scramble through configuration menu’s you can do the following:

chkconfig --add [script name]

If you want the service to start automatically at boot up you can use ntsysv. For more information read my post on Managing Services on Fedora