1/* Copyright (C) 1993-2020 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/* This is almost copied from strncpy.c, written by Torbjorn Granlund. */
19
20#include <string.h>
21
22
23/* Copy no more than N characters of SRC to DEST, returning the address of
24 the terminating '\0' in DEST, if any, or else DEST + N. */
25char *
26__stpncpy_chk (char *dest, const char *src, size_t n, size_t destlen)
27{
28 if (__builtin_expect (destlen < n, 0))
29 __chk_fail ();
30
31 return __stpncpy (dest, src, n);
32}
33