mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
166 lines
4.3 KiB
Groff
166 lines
4.3 KiB
Groff
.\" Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd October 20, 2005
|
|
.Dt NSCD 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm nscd
|
|
.Nd "name service caching daemon"
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl dnst
|
|
.Op Fl i Ar cachename
|
|
.Op Fl I Ar cachename
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility
|
|
is the system caching daemon.
|
|
It can cache almost all types of data and is basically intended to be used
|
|
with the
|
|
.Nm nsswitch
|
|
subsystem.
|
|
The cache is actually per-user.
|
|
This means that each user can work only with the
|
|
cached data that were cached by themselves, and cannot poison the
|
|
cache of other users.
|
|
The
|
|
.Nm
|
|
utility supports two types of caching:
|
|
.Bl -tag -width ".Sy Type"
|
|
.It Sy Type
|
|
.Sy Description
|
|
.It Common caching
|
|
Each cached element is the key+value pair.
|
|
This type of caching supports policies which are applied when maximum
|
|
number of cached elements is exceeded.
|
|
Three policies are available:
|
|
.Cm FIFO
|
|
(first in - first out),
|
|
.Cm LRU
|
|
(least recently used) and
|
|
.Cm LFU
|
|
(least frequently used).
|
|
This type of caching is used with the
|
|
.Fn getXXXbyname
|
|
family of functions.
|
|
.It Multipart caching
|
|
Each cached element is the part of the elements sequence.
|
|
This type of caching is intended to be used with the
|
|
.Fn getXXXent
|
|
family of functions.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Nm
|
|
utility is able not only to cache elements, but to perform the actual nsswitch
|
|
lookups by itself.
|
|
To enable this feature, use the
|
|
.Va perform-actual-lookups
|
|
parameter in
|
|
.Xr nscd.conf 5 .
|
|
.Pp
|
|
The
|
|
.Nm
|
|
utility recognizes the following runtime options:
|
|
.Bl -tag -width indent
|
|
.\" .It Fl d
|
|
.\" XXX Document me!
|
|
.It Fl n
|
|
Do not daemonize;
|
|
.Nm
|
|
will not fork or disconnect itself from the terminal.
|
|
.It Fl s
|
|
Single-threaded mode.
|
|
Forces using only one thread for all processing purposes (it overrides
|
|
the
|
|
.Va threads
|
|
parameter in the
|
|
.Xr nscd.conf 5
|
|
file).
|
|
.It Fl t
|
|
Trace mode.
|
|
All trace messages will be written to stdout.
|
|
This mode is usually used with
|
|
.Fl n
|
|
and
|
|
.Fl s
|
|
flags are used for debugging purposes.
|
|
.It Fl i Ar cachename
|
|
Invalidates personal cache.
|
|
When specified,
|
|
.Nm
|
|
acts as the administration tool.
|
|
It asks the already running
|
|
.Nm
|
|
to invalidate the specified part of the cache of the
|
|
calling user.
|
|
For example, sometimes you may want to invalidate your
|
|
.Dq Li hosts
|
|
cache.
|
|
You can specify
|
|
.Dq Li all
|
|
as the
|
|
.Ar cachename
|
|
to invalidate your personal cache as a whole.
|
|
You cannot use this option for the
|
|
.Ar cachename
|
|
for which the
|
|
.Va perform-actual-lookups
|
|
option is enabled.
|
|
.It Fl I Ar cachename
|
|
Invalidates the cache for every user.
|
|
When specified,
|
|
.Nm
|
|
acts as the administration tool.
|
|
It asks the already
|
|
running
|
|
.Nm
|
|
to invalidate the specified part of the cache for
|
|
every user.
|
|
You can specify
|
|
.Dq Li all
|
|
as the
|
|
.Ar cachename
|
|
to invalidate the whole cache.
|
|
Only the root can use this option.
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width ".Pa /etc/nscd.conf" -compact
|
|
.It Pa /etc/nscd.conf
|
|
The default configuration file.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr nsdispatch 3 ,
|
|
.Xr nscd.conf 5 ,
|
|
.Xr nsswitch.conf 5
|
|
.Sh AUTHORS
|
|
.An Michael Bushkov Aq Mt bushman@FreeBSD.org
|
|
.Sh BUGS
|
|
Please send bug reports and suggestions to
|
|
.Aq Mt bushman@FreeBSD.org .
|