debug/printf_chk.c

   1 /* Copyright (C) 1991, 1995, 1996, 1997, 2001, 2004, 2006, 2007
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdarg.h>
  20 #include <stdio.h>
  21 #include "../libio/libioP.h"
  22
  23
  24 /* Write formatted output to stdout from the format string FORMAT.  */
  25 int
  26 ___printf_chk (int flag, const char *format, ...)
  27 {
  28   va_list ap;
  29   int done;
  30
  31   _IO_acquire_lock_clear_flags2 (stdout);
  32   if (flag > 0)
  33     stdout->_flags2 |= _IO_FLAGS2_FORTIFY;
  34
  35   va_start (ap, format);
  36   done = vfprintf (stdout, format, ap);
  37   va_end (ap);
  38
  39   if (flag > 0)
  40     stdout->_flags2 &= ~_IO_FLAGS2_FORTIFY;
  41   _IO_release_lock (stdout);
  42
  43   return done;
  44 }
  45 ldbl_strong_alias (___printf_chk, __printf_chk)