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glibc  2.9
printf_chk.c
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00001 /* Copyright (C) 1991, 1995, 1996, 1997, 2001, 2004, 2006, 2007
00002    Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <stdarg.h>
00021 #include <stdio.h>
00022 #include "../libio/libioP.h"
00023 
00024 
00025 /* Write formatted output to stdout from the format string FORMAT.  */
00026 int
00027 ___printf_chk (int flag, const char *format, ...)
00028 {
00029   va_list ap;
00030   int done;
00031 
00032   _IO_acquire_lock_clear_flags2 (stdout);
00033   if (flag > 0)
00034     stdout->_flags2 |= _IO_FLAGS2_FORTIFY;
00035 
00036   va_start (ap, format);
00037   done = vfprintf (stdout, format, ap);
00038   va_end (ap);
00039 
00040   if (flag > 0)
00041     stdout->_flags2 &= ~_IO_FLAGS2_FORTIFY;
00042   _IO_release_lock (stdout);
00043 
00044   return done;
00045 }
00046 ldbl_strong_alias (___printf_chk, __printf_chk)