netgroup.5yp

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 5YP 代码 · 共 97 行

.\" SCCSID: @(#)netgroup.5yp	8.1	9/11/90
.TH netgroup 5yp
.SH Name
netgroup \- list of network groups
.SH Description
.NXR "netgroup file" "format"
.NXA "exports file" "netgroup file"
.NXA "exports file" "hosts file"
.NXA "netgroup file" "getnetgrent subroutine"
.NXR "network group" "defining"
The
.PN netgroup
file defines network-wide groups
used for permission checking when doing
remote mounts, remote logins, and remote shells.
For remote mounts, the information in the 
.PN netgroup
file is used to classify machines;
for remote logins and remote shells,
it is used to classify users.
Each line of the
.PN netgroup
file defines a group and has the following format:
.PP
.I groupname member1,...,member_n
.PP
Each member is either another group name or a combination
of the host name, user name, and domain name.
.PP
Any of the three fields can be empty,
in which case a wildcard is assumed.
For example,
to define a group to which everyone belongs, the following entry
could appear in the 
.PN netgroup
file:
.EX
universal (,,)
.EE
.PP
Field names that begin with something other
than a letter, digit, or underscore
(such as ``-'') work in the opposite way.
For example:
.EX
justmachines	(analytica,-,suez)
justpeople	(-,babbage,suez)
.EE
.PP
The machine
.I analytica
belongs to the group
.I justmachines
in the domain
.I suez,
but no users belong to it.
Similarly, the user
.I babbage
belongs to the group 
.I justpeople
in the domain
.I suez,
but no machines belong to it. 
.PP
Network groups are part of the Yellow Pages data base
and are accessed through these files:
.PP
.nf
\f(CW/etc/yp/\fIdomainname\fP/netgroup.dir
\f(CW/etc/yp/\fIdomainname\fP/netgroup.pag
\f(CW/etc/yp/\fIdomainname\fP/netgroup.byuser.dir
\f(CW/etc/yp/\fIdomainname\fP/netgroup.byuser.pag
\f(CW/etc/yp/\fIdomainname\fP/netgroup.byhost.dir
\f(CW/etc/yp/\fIdomainname\fP/netgroup.byhost.pag
.fi
.PP
\fRThese files can be created from 
.PN /etc/netgroup
using 
.MS makedbm 8yp .
.SH Files
\f(CW/etc/netgroup
.br
\f(CW/etc/yp/\fIdomainname\fP/netgroup.dir
.br
\f(CW/etc/yp/\fIdomainname\fP/netgroup.pag
.br
\f(CW/etc/yp/\fIdomainname\fP/netgroup.byuser.dir
.br
\f(CW/etc/yp/\fIdomainname\fP/netgroup.byuser.pag
.br
\f(CW/etc/yp/\fIdomainname\fP/netgroup.byhost.dir
.br
\f(CW/etc/yp/\fIdomainname\fP/netgroup.byhost.pag
.SH See Also
getnetgrent(3yp), makedbm(8yp), ypserv(8yp)