config(4tcp)

config -- Internet networking services configuration file

Synopsis

/etc/inet/config

Description

The config file contains information used to configure various Internet networking services. The file is accessed by /usr/sbin/initialize which is called by /etc/rc2.d/S69inet at boot time.

Usage

For each networking service, the config file contains a one-line entry of the form:

   sort-key:daemon:overriding-daemon:flag:config-filename:options:

The semantics of a config file entry can be summarized as follows:

Using the sort sequence defined by the sort-key field values:

start the daemon daemon with options options when the flag field contains the value Y or y and the config-filename field contains a valid value
do not start the daemon daemon if overriding-daemon was able to run by the same criteria

The fields in the config file are described as follows:

sort-key

A required field that specifies the order in which daemon is started, relative to the other daemons defined in the config file.

daemon

A required field that specifies the full pathname of the daemon that /usr/sbin/initialize starts to provide a particular network service.

overriding-daemon

An optional field that specifies the full pathname of the daemon that /usr/sbin/initialize is to start instead of starting daemon.

Note that, if /usr/sbin/initialize is unable to invoke overriding-daemon (because, for example, no entry exists for overriding-daemon in the config file), or if the flag field in the config file entry for overriding-daemon is set to N or n, daemon will be started instead.

flag

A required field that indicates whether daemon is started at boot time. Values are:

Y or y: start the daemon at boot time
N or n: do not start the daemon at boot time

config-filename

An optional field that specifies the full pathname of the configuration file associated with daemon.

If the flag field is set to Y or y, and if the file config-filename is readable (or the value of the config-filename field is null), then /usr/sbin/initialize will start daemon.

options

An optional field that lists the command options to be specified when daemon is started.

Each field in an entry is separated by a colon; each entry in the file is separated by a new-line.

The sort-key field provides a mechanism for dealing with dependencies between network services daemons at boot time. For example, if your time daemon is fast enough to attempt to reach the Internet before your routing daemon has established a route for it to use, your time daemon will fail. In this case, you would assign to your routing daemon a sort key value in the sort-key field that is less than the value you assign to your time daemon. This ensures that your routing daemon is started before your time daemon is started. Note that multiple characters may be used as sort keys in the sort-key field. Note also that the physical sequence of entries in the config file is unimportant; at boot time, daemons are started using sort-key field key values only.

Examples

Here is a sample config file:

   1:/usr/eac/bin/initsock::y:::
   5:/usr/sbin/in.named::y:/etc/inet/named.boot::
   4a:/usr/sbin/in.gated::Y:/etc/inet/gated.conf::
   4b:/usr/sbin/in.routed:/usr/sbin/in.gated:Y::-q:
   4c:/usr/sbin/route::n::add default router_placeholder 1:
   6:/usr/sbin/in.xntpd::y:/etc/inet/ntp.conf::
   7:/usr/bin/sh::y:/etc/inet/rc.inet:/etc/inet/rc.inet start:

In this example, the line beginning with 4a says that, if the configuration file /etc/inet/gated.conf exists, then run the daemon /usr/sbin/in.gated with no options. The line beginning with 4b says that, if the daemon /usr/sbin/in.gated was not run, then run the daemon /usr/sbin/in.routed with the -q option.