yp —
description of the YP
subsystem
ypinit |
-s master_server
[domainname] |
ypbind |
[-insecure] [-ypset]
[-ypsetme] |
ypset |
[-d domain]
[-h host]
server |
yppoll |
[-d domain]
[-h host]
mapname |
ypcat |
[-kt] [-d
domainname] mapname |
ypmatch |
[-kt] [-d
domainname] key ...
mapname |
ypwhich |
[-t] [-d
domain] [[-h]
host] |
ypwhich |
[-t] [-d
domain] [-h
host] -m
[mname] |
ypserv |
[-1dx] [-a
aclfile] |
ypxfr |
[-cf] [-C
tid prog ipadd port] [-d
domain] [-h
host] [-s
domain] mapname |
yppush |
[-v] [-d
domainname] [-h
hostname] mapname |
The YP subsystem allows network management
of passwd, group, and hosts file entries through the functions
getpwent(3),
getgrent(3) and
gethostbyname(3). A number of other databases can be
network-managed as well, and have their respective functions.
YP also provides hooks for numerous other client
programs such as amd(8) and
bootparamd(8) to access distributed and shareable versions of
their maps through YP. The YP subsystem requires
that portmap(8) be running, since the entire subsystem uses the
RPC subsystem.
ypinit is used to initialize
YP as a master or a slave. This creates various
files in /var/yp. After running
ypinit -m, optionally edit
/var/yp/DOMAINNAME/Makefile to change settings, for
example to switch from the default backwards compatible mode to secure mode.
Finally, always run
make(1) in /var/yp. See
Makefile.yp(8) for details.
If set up as a slave, the required databases are automatically
copied from the specified server.
The YP client subsystem is started
automatically in /etc/rc if the directory
/var/yp/binding exists. The client subsystem can be
turned on and off by creating or deleting that directory.
ypbind(8) will create that directory if run by hand.
The YP server subsystem is started
automatically in /etc/rc if the directory
/var/yp/DOMAINNAME exists. This directory is
automatically created by
ypinit(8) (which initializes the machine as a
YP server).
If ypbind cannot find a server, the system
behaves the same way as Sun's code does: it hangs.
- /var/yp/Makefile.main
- Top level YP Makefile
- /var/yp/Makefile.yp
- YP maps Makefile
domainname(1),
ypcat(1),
ypmatch(1),
ypwhich(1),
yp_bind(3),
defaultdomain(5),
group(5),
passwd(5),
resolv.conf(5),
Makefile.yp(8),
portmap(8),
ypbind(8),
ypinit(8),
yppoll(8),
yppush(8),
ypserv(8),
ypset(8),
ypxfr(8)
This free YP subsystem is thought to be
compatible with Sun's implementation. It is, of course, not compatible with
NIS+ or any other “secure”
YP subsystem other than the native one.
The name YP stands for Yellow Pee.
The ypbind, most library components, and userland programs were
implemented by Theo de Raadt
<deraadt@theos.com>.
The current
getpwent(3) implementation was done by Jason
Downs
<downsj@downsj.com>.
The server component was implemented by Mats O
Jansson
<moj@stacken.kth.se>.