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glibc/debug/fprintf_chk.c

45 lines
1.3 KiB
C

/* Copyright (C) 1991-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdarg.h>
#include <stdio.h>
#include "../libio/libioP.h"
/* Write formatted output to FP from the format string FORMAT. */
int
___fprintf_chk (FILE *fp, int flag, const char *format, ...)
{
va_list ap;
int done;
_IO_acquire_lock_clear_flags2 (fp);
if (flag > 0)
fp->_flags2 |= _IO_FLAGS2_FORTIFY;
va_start (ap, format);
done = vfprintf (fp, format, ap);
va_end (ap);
if (flag > 0)
fp->_flags2 &= ~_IO_FLAGS2_FORTIFY;
_IO_release_lock (fp);
return done;
}
ldbl_strong_alias (___fprintf_chk, __fprintf_chk)