1/* Copyright (C) 1996-2025 Free Software Foundation, Inc.
 2   This file is part of the GNU C Library.
 3
 4   The GNU C Library is free software; you can redistribute it and/or
 5   modify it under the terms of the GNU Lesser General Public
 6   License as published by the Free Software Foundation; either
 7   version 2.1 of the License, or (at your option) any later version.
 8
 9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library; if not, see
16   <https://www.gnu.org/licenses/>.  */
17
18#ifndef _ALIASES_H
19#define _ALIASES_H	1
20
21#include <features.h>
22
23#include <sys/types.h>
24
25
26__BEGIN_DECLS
27
28/* Structure to represent one entry of the alias database.  */
29struct aliasent
30  {
31    char *alias_name;
32    size_t alias_members_len;
33    char **alias_members;
34    int alias_local;
35  };
36
37
38/* Open alias data base files.  */
39extern void setaliasent (void) __THROW;
40
41/* Close alias database files.  */
42extern void endaliasent (void) __THROW;
43
44/* Get the next entry from the alias database.  */
45extern struct aliasent *getaliasent (void) __THROW;
46
47/* Get the next entry from the alias database and put it in RESULT_BUF.  */
48extern int getaliasent_r (struct aliasent *__restrict __result_buf,
49			  char *__restrict __buffer, size_t __buflen,
50			  struct aliasent **__restrict __result) __THROW;
51
52/* Get alias entry corresponding to NAME.  */
53extern struct aliasent *getaliasbyname (const char *__name) __THROW;
54
55/* Get alias entry corresponding to NAME and put it in RESULT_BUF.  */
56extern int getaliasbyname_r (const char *__restrict __name,
57			     struct aliasent *__restrict __result_buf,
58			     char *__restrict __buffer, size_t __buflen,
59			     struct aliasent **__restrict __result) __THROW;
60
61__END_DECLS
62
63#endif /* aliases.h */