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File: [cvs.NetBSD.org] / src / lib / libc / ssp / fgets_chk.c (download)

Revision 1.4, Sat Aug 4 19:37:52 2007 UTC (16 years, 8 months ago) by kristerw
Branch: MAIN
CVS Tags: yamt-pf42-baseX, yamt-pf42-base, matt-mips64-base, matt-armv6-prevmlocking, matt-armv6-nbase, matt-armv6-base, matt-armv6, keiichi-mipv6-base, keiichi-mipv6, hpcarm-cleanup-base, cube-autoconf-base, cube-autoconf
Branch point for: yamt-pf42, wrstuden-fixsa, matt-mips64
Changes since 1.3: +3 -2 lines

Update includes so that this builds for USE_FORT=no too.

/*	$NetBSD: fgets_chk.c,v 1.4 2007/08/04 19:37:52 kristerw 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 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: fgets_chk.c,v 1.4 2007/08/04 19:37:52 kristerw Exp $");

/*LINTLIBRARY*/

#include <ssp/ssp.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <stdlib.h>
#include <ssp/stdio.h>

#undef fgets

char *
__fgets_chk(char * __restrict buf, int len, size_t slen, FILE *fp)
{
	if (slen >= (size_t)INT_MAX)
		return fgets(buf, len, fp);

	if (len >= 0 && len > slen)
		__chk_fail();

	return fgets(buf, len, fp);
}