IFSERVICES(5) Network configuration IFSERVICES(5)NAME
ifservices-* - control network services with ifup/down
SYNOPSIS
/etc/sysconfig/network/ifservices-<configuration_name>/
DESCRIPTION
The directory /etc/sysconfig/network/ifservices-<configuration_name>/
is read by the script /etc/sysconfig/network/scripts/ifup-services
which starts and stops system services when an interface is set
up/down. ifup-services is used by /sbin/ifup, which is the command
line user interface for setting up network interfaces.
This is useful if you don't have a permanent network connection. If you
sometimes boot without network and plug in the network cable later you
can add links to system services in this directory. These services will
then be started with ifup and stopped with ifdown.
The configuration name used for ifservices-* should match exactly the
configuration name of the ifcfg-* file for the interface.
For the usage with NetworkManager (where you don't necessarily need a
ifcfg-* file) you can also use /etc/sysconfig/network/ifser‐
vices-<interface>-<essid>/ (for wlan interfaces) or if that does not
exist /etc/sysconfig/network/ifservices-<interface>/. As a final fall‐
back /etc/sysconfig/network/ifservices/ is checked as well. If Network‐
Manager is active services will be stopped after the interface is down.
The links in this directory are equal to the links in the runlevel
directories /etc/init.d/rc*.d/ They have to point to service start
scripts which are usually in /etc/init.d/. Links starting with 'S' are
start links, which are called in alphabetical order after ifup has set
up the interface. Links starting with 'K' are kill links which are
called before ifdown takes down the interface. See also section
Sequencing Directories in boot (7).
EXAMPLE
In this example we use the eth0 interface, that is not always physi‐
cally connected. As soon as you plug in the cable ypbind and autofs
should be started. When you pull the cable they should be stopped. This
can be reached with:
in file /etc/sysconfig/network/ifcfg-eth0
...
STARTMODE=ifplugd
...
in dir /etc/sysconfig/network/ifservices-eth0/
S10portmap -> /etc/init.d/portmap
S20ypbind -> /etc/init.d/ypbind
S30autofs -> /etc/init.d/autofs
S20autofs -> /etc/init.d/autofs
K30ypbind -> /etc/init.d/ypbind
Now you have to disable the start of this services at boot time
chkconfig ypbind off
chkconfig autofs off
Notes:
You may call scripts/create-ifservices-directory [<interface_name>] to
create a directory with the links from this example. This will create
the directory ifservices-<interface_name> or if no interface name was
given ifservices-template.
Maybe you have to add also variable IFPLUGD_PRIORITY. For details about
startmode ifplugd read ifup (8).
The service portmap had to be added because ypbind needs it. This ser‐
vice is still started at boot time because it does not need an active
network connection. But ypbind may now be started earlier as usual.
Therefore we make sure that portmap is started before. Starting an
already running service again does not affect the service.
SEE ALSOifup(8), ifcfg(5).
AUTHOR
Christian Zoz <zoz@suse.de>
sysconfig February 2005 IFSERVICES(5)