ypbind - NIS binding process
ypbind [-c] [-d | -debug] [-verbose] [-n | -forground] [-broadcast] [-broken-server] [-ypset] [-ypsetme] [-no-ping] [-f configfile] [-local-only] [-ping-interval ping-interval] [-p port]
ypbind finds the server for NIS domains and maintains the NIS binding information. The client (normally the NIS routines in the standard C library) could get the information over RPC from ypbind or read the binding files. The binding files resides in the directory /var/yp/binding and are conventionally named [domainname].[version]. The supported versions are 1, 2 and 3. There could be several such files since it is possible for an NIS client to be bound to more than one domain.
After a binding has been established, ypbind will send YPPROC_DOMAIN requests to the current NIS server at 5 minutes intervals. If it doesn't get an response or the NIS server reports that he doesn't have this domain any longer, ypbind will search for a new NIS server. You could tell ypbind to use network broadcasts to find a new server, what is insecure, or you could give it a list of known secure servers. In this case ypbind will send a ping to all servers in the order in which they are listed in the config file and use the first one which answers.
Unless the option -debug is used, ypbind detaches itself from the controlling terminal and puts itself into background. ypbind uses syslog(3) for logging errors and warnings. At startup or when receiving signal SIGHUP, ypbind parses the file /etc/yp.conf and tries to use the entries for its initial binding.
A broadcast entry in the configuration file will overwrite a ypserver/server entry and a ypserver/server entry broadcast. If all given server are down, ypbind will not switch to use broadcast. ypbind will try at first /etc/hosts and then DNS for resolving the hosts names from /etc/yp.conf. If ypbind couldn't reconfigure the search order, it will use only DNS. If DNS isn't available, you could only use IP-addresses in /etc/hosts. ypbind could only reconfigure the search order with glibc 2.x. If the -broadcast option is specified, ypbind will ignore the configuration file. If the file does not exist or if there are no valid entries, ypbind exit.
-i, -ping-interval ping-interval
ypbind-mt was written by Thorsten Kukuk <email@example.com>.