debug/vfprintf_chk.c

   1 /* Copyright (C) 1991, 1995, 1996, 1997, 2001, 2004
   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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <stdarg.h>
  21 #include <stdio.h>
  22 #include "../libio/libioP.h"
  23
  24
  25 /* Write formatted output to FP from the format string FORMAT.  */
  26 int
  27 __vfprintf_chk (FILE *fp, int flag, const char *format, va_list ap)
  28 {
  29   int done;
  30
  31   _IO_acquire_lock (fp);
  32   if (flag > 0)
  33     fp->_flags2 |= _IO_FLAGS2_FORTIFY;
  34
  35   done = vfprintf (fp, format, ap);
  36
  37   if (flag > 0)
  38     fp->_flags2 &= ~_IO_FLAGS2_FORTIFY;
  39   _IO_release_lock (fp);
  40
  41   return done;
  42 }