glibc/debug/strcpy_chk.c

34 lines
1.1 KiB
C

/* Copyright (C) 1991-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stddef.h>
#include <string.h>
#include <memcopy.h>
#undef strcpy
/* Copy SRC to DEST with checking of destination buffer overflow. */
char *
__strcpy_chk (char *dest, const char *src, size_t destlen)
{
size_t len = strlen (src);
if (len >= destlen)
__chk_fail ();
return memcpy (dest, src, len + 1);
}