1/* Copyright (c) 1997-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
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#include <errno.h>
20#include <string.h>
21#include <rpcsvc/nis.h>
22#include <shlib-compat.h>
23
24nis_name
25nis_domain_of_r (const_nis_name name, char *buffer, size_t buflen)
26{
27 char *cptr;
28 size_t cptr_len;
29
30 if (buffer == NULL)
31 {
32 erange:
33 __set_errno (ERANGE);
34 return NULL;
35 }
36
37 buffer[0] = '\0';
38
39 cptr = strchr (name, '.');
40
41 if (cptr == NULL)
42 return buffer;
43
44 ++cptr;
45 cptr_len = strlen (cptr);
46
47 if (cptr_len == 0)
48 {
49 if (buflen < 2)
50 goto erange;
51 return strcpy (buffer, ".");
52 }
53
54 if (__glibc_unlikely (cptr_len >= buflen))
55 {
56 __set_errno (ERANGE);
57 return NULL;
58 }
59
60 return memcpy (buffer, cptr, cptr_len + 1);
61}
62libnsl_hidden_nolink_def (nis_domain_of_r, GLIBC_2_1)
63