GDOMAP(8) GNUstep System Manual GDOMAP(8)
NAME
gdomap - GNUstep Distributed Objects name server
SYNOPSIS
gdomap [-C|-H] [-I pidfile] [-L name] [-M name] [-N] [-P number] [-R
name] [-S] [-T type] [-U name] [-a file] [-c file] [-d] [-f] [-i sec-
onds] [-j path] [-p]
DESCRIPTION
gdomap The gdomap daemon is used by GNUstep programs to look up distrib-
uted objects of processes running across the network (and between dif-
ferent 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, un-
der Command-line Tools.
Usually the gdomap daemon is started at system boot time and binds it-
self 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 net-
works 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 explic-
itly, 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 func-
tionality 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 oper-
ating 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 se-
ries 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 imple-
ment 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. -S
-S list the addresses of all gdomap servers known to host
-T type
port type for -L , -R and -U options - tcp_gdo, udp_gdo, tcp_for-
eign, 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
-j path
place the process in a chroot jail at this path rather than in
/tmp
-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-itcon-
sulting.com>.
GNUstep August 2003 GDOMAP(8)
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