debug/vfprintf_chk.c

   1 /* Copyright (C) 1991, 1995, 1996, 1997, 2001, 2004, 2005, 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 FP from the format string FORMAT.  */
  25 int
  26 ___vfprintf_chk (FILE *fp, int flag, const char *format, va_list ap)
  27 {
  28   int done;
  29
  30   _IO_acquire_lock_clear_flags2 (fp);
  31   if (flag > 0)
  32     fp->_flags2 |= _IO_FLAGS2_FORTIFY;
  33
  34   done = vfprintf (fp, format, ap);
  35
  36   if (flag > 0)
  37     fp->_flags2 &= ~_IO_FLAGS2_FORTIFY;
  38   _IO_release_lock (fp);
  39
  40   return done;
  41 }
  42 ldbl_hidden_def (___vfprintf_chk, __vfprintf_chk)
  43 ldbl_strong_alias (___vfprintf_chk, __vfprintf_chk)