.\" Copyright (c) 1992, 1993 .\" The Regents of the University of California. 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. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. .\" .\" @(#)getnetgrent.3 8.1 (Berkeley) 6/4/93 .\" $FreeBSD: src/lib/libc/gen/getnetgrent.3,v 1.10 2001/10/01 16:08:51 ru Exp $ .\" .Dd June 4, 1993 .Dt GETNETGRENT 3 .Os .Sh NAME .Nm getnetgrent , .Nm innetgr , .Nm setnetgrent , .Nm endnetgrent .Nd netgroup database operations .Sh LIBRARY .Lb libc .Sh SYNOPSIS .In netdb.h .Ft int .Fn getnetgrent "char **host" "char **user" "char **domain" .Ft int .Fn innetgr "const char *netgroup" "const char *host" "const char *user" "const char *domain" .Ft void .Fn setnetgrent "const char *netgroup" .Ft void .Fn endnetgrent void .Sh DESCRIPTION These functions operate on the netgroup database file .Pa /etc/netgroup which is described in .Xr netgroup 5 . The database defines a set of netgroups, each made up of one or more triples: .Bd -literal -offset indent (host, user, domain) .Ed that defines a combination of host, user and domain. Any of the three fields may be specified as ``wildcards'' that match any string. .Pp The function .Fn getnetgrent sets the three pointer arguments to the strings of the next member of the current netgroup. If any of the string pointers are .Sy (char *)0 that field is considered a wildcard. .Pp The functions .Fn setnetgrent and .Fn endnetgrent set the current netgroup and terminate the current netgroup respectively. If .Fn setnetgrent is called with a different netgroup than the previous call, an implicit .Fn endnetgrent is implied. .Fn Setnetgrent also sets the offset to the first member of the netgroup. .Pp The function .Fn innetgr searches for a match of all fields within the specified group. If any of the .Sy host , .Sy user , or .Sy domain arguments are .Sy (char *)0 those fields will match any string value in the netgroup member. .Sh RETURN VALUES The function .Fn getnetgrent returns 0 for ``no more netgroup members'' and 1 otherwise. The function .Fn innetgr returns 1 for a successful match and 0 otherwise. The functions .Fn setnetgrent and .Fn endnetgrent have no return value. .Sh FILES .Bl -tag -width /etc/netgroup -compact .It Pa /etc/netgroup netgroup database file .El .Sh SEE ALSO .Xr netgroup 5 .Sh COMPATIBILITY The netgroup members have three string fields to maintain compatibility with other vendor implementations, however it is not obvious what use the .Sy domain string has within .Bx . .Sh BUGS The function .Fn getnetgrent returns pointers to dynamically allocated data areas that are freed when the function .Fn endnetgrent is called.