1/* Copyright (c) 1997-2023 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 <errno.h>
19#include <string.h>
20#include <rpcsvc/nis.h>
21#include <shlib-compat.h>
22
23nis_name
24nis_domain_of_r (const_nis_name name, char *buffer, size_t buflen)
25{
26 char *cptr;
27 size_t cptr_len;
28
29 if (buffer == NULL)
30 {
31 erange:
32 __set_errno (ERANGE);
33 return NULL;
34 }
35
36 buffer[0] = '\0';
37
38 cptr = strchr (name, '.');
39
40 if (cptr == NULL)
41 return buffer;
42
43 ++cptr;
44 cptr_len = strlen (cptr);
45
46 if (cptr_len == 0)
47 {
48 if (buflen < 2)
49 goto erange;
50 return strcpy (buffer, ".");
51 }
52
53 if (__glibc_unlikely (cptr_len >= buflen))
54 {
55 __set_errno (ERANGE);
56 return NULL;
57 }
58
59 return memcpy (buffer, cptr, cptr_len + 1);
60}
61libnsl_hidden_nolink_def (nis_domain_of_r, GLIBC_2_1)
62