132 lines
3.9 KiB
Groff
132 lines
3.9 KiB
Groff
.\" Copyright (c) 1992, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)getnetgrent.3 8.1 (Berkeley) 6/4/93
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.\" $FreeBSD$
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.\"
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.Dd June 4, 1993
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.Dt GETNETGRENT 3
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.Os
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.Sh NAME
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.Nm getnetgrent ,
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.Nm innetgr ,
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.Nm setnetgrent ,
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.Nm endnetgrent
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.Nd netgroup database operations
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In netdb.h
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.Ft int
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.Fn getnetgrent "char **host" "char **user" "char **domain"
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.Ft int
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.Fn innetgr "const char *netgroup" "const char *host" "const char *user" "const char *domain"
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.Ft void
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.Fn setnetgrent "const char *netgroup"
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.Ft void
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.Fn endnetgrent void
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.Sh DESCRIPTION
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These functions operate on the netgroup database file
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.Pa /etc/netgroup
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which is described
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in
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.Xr netgroup 5 .
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The database defines a set of netgroups, each made up of one or more triples:
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.Bd -literal -offset indent
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(host, user, domain)
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.Ed
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that defines a combination of host, user and domain.
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Any of the three fields may be specified as ``wildcards'' that match any
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string.
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.Pp
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The function
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.Fn getnetgrent
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sets the three pointer arguments to the strings of the next member of the
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current netgroup.
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If any of the string pointers are
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.Sy (char *)0
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that field is considered a wildcard.
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.Pp
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The functions
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.Fn setnetgrent
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and
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.Fn endnetgrent
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set the current netgroup and terminate the current netgroup respectively.
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If
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.Fn setnetgrent
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is called with a different netgroup than the previous call, an implicit
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.Fn endnetgrent
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is implied.
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The
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.Fn setnetgrent
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function
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also sets the offset to the first member of the netgroup.
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.Pp
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The function
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.Fn innetgr
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searches for a match of all fields within the specified group.
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If any of the
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.Sy host ,
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.Sy user ,
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or
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.Sy domain
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arguments are
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.Sy (char *)0
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those fields will match any string value in the netgroup member.
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.Sh RETURN VALUES
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The function
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.Fn getnetgrent
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returns 0 for ``no more netgroup members'' and 1 otherwise.
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The function
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.Fn innetgr
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returns 1 for a successful match and 0 otherwise.
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The functions
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.Fn setnetgrent
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and
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.Fn endnetgrent
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have no return value.
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.Sh FILES
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.Bl -tag -width /etc/netgroup -compact
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.It Pa /etc/netgroup
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netgroup database file
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.El
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.Sh COMPATIBILITY
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The netgroup members have three string fields to maintain compatibility
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with other vendor implementations, however it is not obvious what use the
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.Sy domain
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string has within
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.Bx .
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.Sh SEE ALSO
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.Xr netgroup 5
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.Sh BUGS
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The function
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.Fn getnetgrent
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returns pointers to dynamically allocated data areas that are freed when
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the function
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.Fn endnetgrent
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is called.
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