NAME¶
gdomap - GNUstep Distributed Objects name server
SYNOPSIS¶
gdomap [
-C|-H] [
-I
pidfile] [
-L name] [
-M name] [
-N]
[
-P number] [
-R name] [
-T type]
[
-U name] [
-a file] [
-c file]
[
-d] [
-f] [-i
seconds] [
-p]
DESCRIPTION¶
gdomap The gdomap daemon is used by GNUstep programs to look up
distributed objects of processes running across the network (and between
different user accounts on a single machine). The daemon is NOT used for
lookup where two processes belonging to the same user are using a host-local
connection. This manual page explains the usage of gdomap. For design and
implementation information (and special notes for packagers), please see the
HTML documentation installed in $GNUSTEP_SYSTEM_DOC, under Command-line Tools.
Usually the gdomap daemon is started at system boot time and binds itself to
port 538. See the
GNUstep Build Guide for a sample startup script.
By default gdomap probes every machine on the local network to see if there is a
copy of gdomap running on it. This is done for class-C networks and subnets of
class-C networks. If your host is on a class-B or class-A net then the default
behaviour is to treat it as a class-C net and probe only the hosts that would
be expected on a class-C network of the same number.
If you are running on a class-A or class-B network, or if your net has a large
number of hosts which will not have gdomap on them - you may want to supply a
configuration file listing the hosts to be probed explicitly, rather than
getting gdomap to probe all hosts on the local net.
You may also want to supply the
configuration file so that hosts which
are not actually on your local network can still be found when your code tries
to connect to a host using @"*" as the host name. NB. this
functionality does not exist in OpenStep.
A
configuration file consists of a list of IP addresses to be probed. The
IP addresses should be in standard 'dot' notation, one per line. Empty lines
are permitted in the configuration file. Anything on a line after a hash ('#')
is ignored. You tell gdomap about the config file with the '-c' command line
option.
gdomap uses the SIOCGIFCONF ioctl to build a list of IP addresses and netmasks
for the network interface cards on your machine. On some operating systems,
this facility is not available (or is broken), so you must tell gdomap the
addresses and masks of the interfaces using the '-a' command line option. The
file named with '-a' should contain a series of lines with space separated
pairs of addresses and masks in 'dot' notation. You must NOT include loopback
interfaces in this list. If you want to support broadcasting of probe
information on a network, you may supply the broadcast address as a third item
on the line. If your operating system has some other method of giving you a
list of network interfaces and masks, please send me example code so that I
can implement it in gdomap.
OPTIONS¶
- -C
- help about configuration
- -H
- general help
- -I
- pid file to write pid
- -L name
- perform lookup for name then quit.
- -M name
- machine name for -L and -N
- -N
- list all names registered on host
- -P number
- port number required for -R option.
- -R name
- register name locally then quit.
- -T type
- port type for -L , -R and -U options -
tcp_gdo, udp_gdo, tcp_foreign, udp_foreign.
- -U name
- unregister name locally then quit.
- -a file
- use config file for interface list.
- -c file
- use config file for probe.
- -d
- extra debug logging (normally via syslog).
- -f
- avoid fork() to make debugging easy
- -i seconds
- re-probe at this interval (roughly), min 60
- -p
- disable probing for other servers
FILES¶
Use the
-c option to specify a configuration file for gdomap. See under
DESCRIPTION for possible configurations.
DIAGNOSTICS¶
Kill with SIGUSR1 to obtain a dump of all known peers in /tmp/gdomap.dump
gdomap -N lists all registered names on the local host.
SEE ALSO¶
gdomap -C gives above instructions on how to set up gdomap.
gdnc(1),
GNUstep(7),
gpbs(1)
The GNUstep Build Guide example rc script:
<
http://gnustep.made-it.com/BuildGuide/index.html#GNUSTEP.SERVICES>
HISTORY¶
Work on
gdomap started in October 1996.
This manual page first appeared in gnustep-base 1.7.1 (June 2003).
AUTHORS¶
gdomap was written by Richard Frith-Macdonald <rfm@gnu.org>
This manual page was put together by Martin Brecher
<martin@mb-itconsulting.com>.