debug/obprintf_chk.c

   1 /* Print output of stream to given obstack.
   2    Copyright (C) 1996-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <libio/libioP.h>
  21 #include <stdarg.h>
  22
  23
  24 int
  25 __obstack_printf_chk (struct obstack *obstack, int flag, const char *format,
  26                       ...)
  27 {
  28   /* For flag > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
  29      can only come from read-only format strings.  */
  30   unsigned int mode = (flag > 0) ? PRINTF_FORTIFY : 0;
  31   va_list ap;
  32   int ret;
  33
  34   va_start (ap, format);
  35   ret = __obstack_vprintf_internal (obstack, format, ap, mode);
  36   va_end (ap);
  37
  38   return ret;
  39 }