1/* Copyright (C) 1996-2020 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#ifdef HAVE_CONFIG_H
19# include "config.h"
20#endif
21
22#include <stdio.h>
23#include <sys/types.h>
24
25#if defined _LIBC || defined STDC_HEADERS
26# include <stdlib.h>
27# include <string.h>
28#else
29char *malloc ();
30#endif
31
32#undef __strndup
33#undef strndup
34
35#ifndef weak_alias
36# define __strndup strndup
37#endif
38
39char *
40__strndup (const char *s, size_t n)
41{
42 size_t len = __strnlen (s, n);
43 char *new = (char *) malloc (len + 1);
44
45 if (new == NULL)
46 return NULL;
47
48 new[len] = '\0';
49 return (char *) memcpy (new, s, len);
50}
51#ifdef libc_hidden_def
52libc_hidden_def (__strndup)
53#endif
54#ifdef weak_alias
55weak_alias (__strndup, strndup)
56#endif
57