debug/stpcpy_chk.c

   1 /* Copyright (C) 1992-2023 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 #ifdef HAVE_CONFIG_H
  19 # include <config.h>
  20 #endif
  21
  22 #include <string.h>
  23
  24
  25 /* Copy SRC to DEST, returning the address of the terminating '\0' in DEST.  */
  26 char *
  27 __stpcpy_chk (char *dest, const char *src, size_t destlen)
  28 {
  29   size_t len = strlen (src);
  30   if (len >= destlen)
  31     __chk_fail ();
  32
  33   return memcpy (dest, src, len + 1) + len;
  34 }