1.\" Copyright (c) 1992, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.Dd June 5, 2016 29.Dt GETNETGRENT 3 30.Os 31.Sh NAME 32.Nm getnetgrent , 33.Nm innetgr , 34.Nm setnetgrent , 35.Nm endnetgrent 36.Nd netgroup database operations 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In netdb.h 41.Ft int 42.Fn getnetgrent "char **host" "char **user" "char **domain" 43.Ft int 44.Fn getnetgrent_r "char **host" "char **user" "char **domain" "char *buf" "size_t bufsize" 45.Ft int 46.Fn innetgr "const char *netgroup" "const char *host" "const char *user" "const char *domain" 47.Ft void 48.Fn setnetgrent "const char *netgroup" 49.Ft void 50.Fn endnetgrent void 51.Sh DESCRIPTION 52These functions operate on the netgroup database file 53.Pa /etc/netgroup 54which is described 55in 56.Xr netgroup 5 . 57The database defines a set of netgroups, each made up of one or more triples: 58.Bd -literal -offset indent 59(host, user, domain) 60.Ed 61that defines a combination of host, user and domain. 62Any of the three fields may be specified as ``wildcards'' that match any 63string. 64.Pp 65The function 66.Fn getnetgrent 67sets the three pointer arguments to the strings of the next member of the 68current netgroup. 69If any of the string pointers are 70.Dv NULL 71that field is considered a wildcard. 72.Pp 73The functions 74.Fn setnetgrent 75and 76.Fn endnetgrent 77set the current netgroup and terminate the current netgroup respectively. 78If 79.Fn setnetgrent 80is called with a different netgroup than the previous call, an implicit 81.Fn endnetgrent 82is implied. 83The 84.Fn setnetgrent 85function 86also sets the offset to the first member of the netgroup. 87.Pp 88The function 89.Fn innetgr 90searches for a match of all fields within the specified group. 91If any of the 92.Sy host , 93.Sy user , 94or 95.Sy domain 96arguments are 97.Dv NULL 98those fields will match any string value in the netgroup member. 99.Sh RETURN VALUES 100The function 101.Fn getnetgrent 102returns 0 for ``no more netgroup members'' and 1 otherwise. 103The function 104.Fn innetgr 105returns 1 for a successful match and 0 otherwise. 106The functions 107.Fn setnetgrent 108and 109.Fn endnetgrent 110have no return value. 111.Sh FILES 112.Bl -tag -width /etc/netgroup -compact 113.It Pa /etc/netgroup 114netgroup database file 115.El 116.Sh COMPATIBILITY 117The netgroup members have three string fields to maintain compatibility 118with other vendor implementations, however it is not obvious what use the 119.Sy domain 120string has within 121.Bx . 122.Sh SEE ALSO 123.Xr netgroup 5 124.Sh BUGS 125The function 126.Fn getnetgrent 127returns pointers to dynamically allocated data areas that are freed when 128the function 129.Fn endnetgrent 130is called. 131