Operation Manual

Find useful information about init scripts in Section 16.2.1, “Runlevels”
(page 231).
To create a custom init script for a given program or service, use the le /etc/init
.d/skeleton as a template. Save a copy of this le under the new name and edit
the relevant program and lenames, paths and other details as needed. You may also
need to enhance the script with your own parts, so the correct actions are triggered by
the init procedure.
The INIT INFO block at the top is a required part of the script and must be edited.
See Example 16.1, “A Minimal INIT INFO Block” (page 237).
Example 16.1
A Minimal INIT INFO Block
### BEGIN INIT INFO
# Provides: FOO
# Required-Start: $syslog $remote_fs
# Required-Stop: $syslog $remote_fs
# Default-Start: 3 5
# Default-Stop: 0 1 2 6
# Description: Start FOO to allow XY and provide YZ
### END INIT INFO
In the rst line of the INFO block, after Provides:, specify the name of the program
or service controlled by this init script. In the Required-Start: and
Required-Stop: lines, specify all services that need to be started or stopped before
the service itself is started or stopped. This information is used later to generate the
numbering of script names, as found in the runlevel directories. After
Default-Start: and Default-Stop:, specify the runlevels in which the service
should automatically be started or stopped. Finally, for Description:, provide a
short description of the service in question.
To create the links from the runlevel directories (/etc/init.d/rc?.d/) to the
corresponding scripts in /etc/init.d/, enter the command insserv
new-script-name. The insserv program evaluates the INIT INFO header to create
the necessary links for start and stop scripts in the runlevel directories (/etc/init
.d/rc?.d/). The program also takes care of the correct start and stop order for each
runlevel by including the necessary numbers in the names of these links. If you prefer
a graphical tool to create such links, use the runlevel editor provided by YaST, as de-
scribed in Section 16.2.3, “Conguring System Services (Runlevel) with YaST”
(page 238).
Booting and Conguring a Linux System 237