Differential D32306 Diff 96299 lib/libc/secure/sprintf_chk.c

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lib/libc/secure/sprintf_chk.c

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				/* $NetBSD: sprintf_chk.c,v 1.6 2009/02/05 05:40:36 lukem Exp $ */

				/*-
				* Copyright (c) 2006 The NetBSD Foundation, Inc.
				* All rights reserved.
				*
				* This code is derived from software contributed to The NetBSD Foundation
				* by Christos Zoulas.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
				*/
				#include <sys/cdefs.h>
				__RCSID("$NetBSD: sprintf_chk.c,v 1.6 2009/02/05 05:40:36 lukem Exp $");

				#include <limits.h>
				#include <stdarg.h>
				#include <stdio.h>

				#include <ssp/stdio.h>
				#undef vsnprintf
				#undef vsprintf

				int
				__sprintf_chk(char * __restrict buf, int flags, size_t slen,
				const char * __restrict fmt, ...)
				{
				va_list ap;
				int rv;
				kibUnsubmitted Done Inline Actions These lint-style comments (as well LINTLIBRARY) are not relevant either. kib: These lint-style comments (as well LINTLIBRARY) are not relevant either.

				va_start(ap, fmt);
				if (slen > (size_t)INT_MAX)
				rv = vsprintf(buf, fmt, ap);
				else {
				if ((rv = vsnprintf(buf, slen, fmt, ap)) >= 0 &&
				(size_t)rv >= slen)
				__chk_fail();
				}
				va_end(ap);

				return (rv);
				}