1/* Copyright (C) 2017-2020 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#include <stdlib.h>
19#include <string.h>
20#include <errno.h>
21#include <unistd.h>
22#include <libc-lock.h>
23#include "nisdomain.h"
24
25#define MAXDOMAINNAMELEN 1024
26
27static char domainname[MAXDOMAINNAMELEN];
28
29__libc_lock_define_initialized (static, domainname_lock)
30
31int
32__nss_get_default_domain (char **outdomain)
33{
34 int result = 0;
35 *outdomain = NULL;
36
37 __libc_lock_lock (domainname_lock);
38
39 if (domainname[0] != '\0')
40 {
41 if (getdomainname (domainname, MAXDOMAINNAMELEN) < 0)
42 result = errno;
43 else if (strcmp (domainname, "(none)") == 0)
44 {
45 /* If domainname is not set, some systems will return "(none)" */
46 domainname[0] = '\0';
47 result = ENOENT;
48 }
49 else
50 *outdomain = domainname;
51 }
52 else
53 *outdomain = domainname;
54
55 __libc_lock_unlock (domainname_lock);
56
57 return result;
58}
59