ypbind - NIS binding process
/usr/sbin/ypbind [ -debug ] [ -broken_server ] [ -ypset ] [ -ypsetme ]
ypbind finds the server for a NIS domain and stores the information about it in a binding file. The binding file resides in the directory /var/yp/binding and is conventionally named domainname.version. The only supported version is version 2.
Unless the option -debug is used, ypbind detaches itself from the controlling terminal and puts itself into background. ypbind uses syslog() 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. Valid entries are
domain nisdomain server hostname
Use server hostname for the domain nisdomain.
domain nisdomain broadcast
Use broadcast on the local net for domain nisdomain.
ypserver hostname
Use server server for the local domain. The IP-address of server must be listed in /etc/hosts.
If the file does not exist of if there are no valid entries, ypbind broadcasts on the local net looking for a NIS server for the local domain.
ypbind is split into two processes. The master process services RPC requests asking for binding info. The slave process initializes the binding and checks it periodically. Upon failure, the binding is invalidated and the process tries again to find a valid server.
|
-ypset |
ypset(8) may be used to change the binding for a domain. |
-ypsetme
ypset(8) may only be used from the local host to change the binding for a domain.
|
-debug |
starts ypbind in debug mode. ypbind will not put itself into background, and error messages and debug output are written to standard error. |
-broken_server
lets ypbind accept answers from servers running on an illegal port number. This should usually be avoided, but is required on Solaris 2.4 (there should be a patch for Solaris which fixes this broken behaviour.)
/etc/yp.conf - configuration file.
/var/yp/binding/domainname.version - binding file containing information about domain.
/var/run/ypbind.pid - contains the process id of the currently running ypbind master process. ypbind sets a write lock to this file to prevent multiple copies of itself from running.
ypbind will only use the last entry for a domain from /etc/yp.conf, binding to multiple servers for a single domain is not yet supported.
ypbind was written by Swen Thuemmler <swen@uni-paderborn.de>. Michael Rausch <mrausch@ernie.mi.uni-koeln.de> added support for SysV-IPC. Numerous bugfixes from other contributors.