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.\" @(#)getnetgrent.3 8.1 (Berkeley) 6/4/93 29.\" 30.Dd June 5, 2016 31.Dt GETNETGRENT 3 32.Os 33.Sh NAME 34.Nm getnetgrent , 35.Nm innetgr , 36.Nm setnetgrent , 37.Nm endnetgrent 38.Nd netgroup database operations 39.Sh LIBRARY 40.Lb libc 41.Sh SYNOPSIS 42.In netdb.h 43.Ft int 44.Fn getnetgrent "char **host" "char **user" "char **domain" 45.Ft int 46.Fn getnetgrent_r "char **host" "char **user" "char **domain" "char *buf" "size_t bufsize" 47.Ft int 48.Fn innetgr "const char *netgroup" "const char *host" "const char *user" "const char *domain" 49.Ft void 50.Fn setnetgrent "const char *netgroup" 51.Ft void 52.Fn endnetgrent void 53.Sh DESCRIPTION 54These functions operate on the netgroup database file 55.Pa /etc/netgroup 56which is described 57in 58.Xr netgroup 5 . 59The database defines a set of netgroups, each made up of one or more triples: 60.Bd -literal -offset indent 61(host, user, domain) 62.Ed 63that defines a combination of host, user and domain. 64Any of the three fields may be specified as ``wildcards'' that match any 65string. 66.Pp 67The function 68.Fn getnetgrent 69sets the three pointer arguments to the strings of the next member of the 70current netgroup. 71If any of the string pointers are 72.Dv NULL 73that field is considered a wildcard. 74.Pp 75The functions 76.Fn setnetgrent 77and 78.Fn endnetgrent 79set the current netgroup and terminate the current netgroup respectively. 80If 81.Fn setnetgrent 82is called with a different netgroup than the previous call, an implicit 83.Fn endnetgrent 84is implied. 85The 86.Fn setnetgrent 87function 88also sets the offset to the first member of the netgroup. 89.Pp 90The function 91.Fn innetgr 92searches for a match of all fields within the specified group. 93If any of the 94.Sy host , 95.Sy user , 96or 97.Sy domain 98arguments are 99.Dv NULL 100those fields will match any string value in the netgroup member. 101.Sh RETURN VALUES 102The function 103.Fn getnetgrent 104returns 0 for ``no more netgroup members'' and 1 otherwise. 105The function 106.Fn innetgr 107returns 1 for a successful match and 0 otherwise. 108The functions 109.Fn setnetgrent 110and 111.Fn endnetgrent 112have no return value. 113.Sh FILES 114.Bl -tag -width /etc/netgroup -compact 115.It Pa /etc/netgroup 116netgroup database file 117.El 118.Sh COMPATIBILITY 119The netgroup members have three string fields to maintain compatibility 120with other vendor implementations, however it is not obvious what use the 121.Sy domain 122string has within 123.Bx . 124.Sh SEE ALSO 125.Xr netgroup 5 126.Sh BUGS 127The function 128.Fn getnetgrent 129returns pointers to dynamically allocated data areas that are freed when 130the function 131.Fn endnetgrent 132is called. 133