1/* Internal header for netgroup related functions.
2 Copyright (C) 1996-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _NETGROUP_H
20#define _NETGROUP_H 1
21
22#include <nsswitch.h>
23
24/* A netgroup can consist of names of other netgroups. We have to
25 track which netgroups were read and which still have to be read. */
26struct name_list
27{
28 struct name_list *next;
29 char name[];
30};
31
32
33/* Dataset for iterating netgroups. */
34struct __netgrent
35{
36 enum { triple_val, group_val } type;
37
38 union
39 {
40 struct
41 {
42 const char *host;
43 const char *user;
44 const char *domain;
45 }
46 triple;
47
48 const char *group;
49 } val;
50
51 /* Room for the data kept between the calls to the netgroup
52 functions. We must avoid global variables. */
53 char *data;
54 size_t data_size;
55 union
56 {
57 char *cursor;
58 unsigned long int position;
59 };
60 int first;
61
62 struct name_list *known_groups;
63 struct name_list *needed_groups;
64
65 /* This handle for the NSS data base is shared between all
66 set/get/endXXXent functions. */
67 struct nss_action *nip;
68};
69
70
71/* The internal netgroup handling functions might be called from outside. */
72extern int __internal_setnetgrent (const char *group,
73 struct __netgrent *datap);
74libc_hidden_proto (__internal_setnetgrent)
75extern void __internal_endnetgrent (struct __netgrent *datap);
76libc_hidden_proto (__internal_endnetgrent)
77extern int __internal_getnetgrent_r (char **hostp, char **userp,
78 char **domainp, struct __netgrent *datap,
79 char *buffer, size_t buflen, int *errnop);
80libc_hidden_proto (__internal_getnetgrent_r)
81
82#endif /* netgroup.h */
83