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GDOMAP

Section: GNUstep System Manual (8)
Updated: August 2003
Index

NAME

gdomap - GNUstep Distributed Objects name server

SYNOPSIS

gdomap[-C|-H][-Ipidfile][-Lname][-Mname][-N][-Pnumber][-Rname][-Ttype][-Uname][-afile][-cfile][-d][-f][-iseconds][-jpath][-p]

DESCRIPTION

gdomapThe gdomap daemon is used by GNUstep programs to look up distributed objectsof processes running across the network (and between different user accountson a single machine). The daemon is NOT used for lookup where two processesbelonging to the same user are using a host-local connection. Thismanual page explains the usage of gdomap. For design and implementationinformation (and special notes for packagers), please see the HTMLdocumentation installed in $GNUSTEP_SYSTEM_DOC, under Command-line Tools.Usually the gdomap daemon is started at system boot time and binds itself toport 538. See the GNUstep Build Guide for a sample startup script.

By default gdomap probes every machine on the local network to see if thereis a copy of gdomap running on it. This is done for class-C networks andsubnets of class-C networks. If your host is on a class-B or class-A netthen the default behaviour is to treat it as a class-C net and probe onlythe 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 alarge number of hosts which will not have gdomap on them - you may want tosupply 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 theconfiguration fileso that hosts which arenot actually on your local network can still be found when your code triesto connect to a host using @"*" as the host name. NB. this functionalitydoes 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 andnetmasks for the network interface cards on your machine. On some operatingsystems, this facility is not available (or is broken), so you must tellgdomap the addresses and masks of the interfaces using the '-a' command lineoption. The file named with '-a' should contain a series of lines withspace 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 ofnetwork interfaces and masks, please send me example code so that I canimplement 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 -Land -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,-Rand-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
-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 DESCRIPTIONfor possible configurations.

DIAGNOSTICS

Kill with SIGUSR1 to obtain a dump of all known peersin /tmp/gdomap.dumpgdomap -Nlists all registered names on the local host.

HISTORY

Work on gdomapstarted in October 1996.

This manual page first appeared in gnustep-base 1.7.1 (June 2003).

AUTHORS

gdomapwas written by Richard Frith-Macdonald <rfmAATTgnu.org>

This manual page was put together by Martin Brecher<martinAATTmb-itconsulting.com>.

This document was created byman2html,using the manual pages.