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lib/libc/secure/__vsprintf_chk.c
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/*- | |||||
* Copyright (C) 2012 The Android Open Source Project | |||||
* All rights reserved. | |||||
* | |||||
* Redistribution and use in source and binary forms, with or without | |||||
* modification, are permitted provided that the following conditions | |||||
* are met: | |||||
* * Redistributions of source code must retain the above copyright | |||||
* notice, this list of conditions and the following disclaimer. | |||||
* * Redistributions in binary form must reproduce the above copyright | |||||
* notice, this list of conditions and the following disclaimer in | |||||
* the documentation and/or other materials provided with the | |||||
* distribution. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED | |||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |||||
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||||
* SUCH DAMAGE. | |||||
* | |||||
* bionic rev: d807b9a12d3e49132b095df3d883618452033b51 | |||||
* | |||||
* $FreeBSD$ | |||||
*/ | |||||
#undef _FORTIFY_SOURCE | |||||
#include <sys/cdefs.h> | |||||
#include <secure/security.h> | |||||
#include <stdio.h> | |||||
#include <stdlib.h> | |||||
#include <stdarg.h> | |||||
#include "secure/_stdio.h" | |||||
int | |||||
__vsprintf_chk(char * __restrict d, int flags, size_t bos, const char * __restrict fmt, __va_list va) | |||||
{ | |||||
int result; | |||||
if (__predict_false(bos == __FORTIFY_UNKNOWN_SIZE)) | |||||
return (vsprintf(d, fmt, va)); | |||||
result = vsnprintf(d, bos, fmt, va); | |||||
if ((size_t)result >= bos) | |||||
__fortify_chk_fail( | |||||
"vsprintf: prevented write past end of buffer"); | |||||
return (result); | |||||
} | |||||
int | |||||
__sprintf_chk(char * __restrict d, int flags, size_t bos, const char * __restrict fmt, ...) | |||||
{ | |||||
va_list va; | |||||
int result; | |||||
if (bos == __FORTIFY_UNKNOWN_SIZE) { | |||||
va_start(va, fmt); | |||||
result = vsprintf(d, fmt, va); | |||||
va_end(va); | |||||
return (result); | |||||
} | |||||
va_start(va, fmt); | |||||
result = __vsprintf_chk(d, flags, bos, fmt, va); | |||||
va_end(va); | |||||
return (result); | |||||
} |