| 1 | /* $NetBSD: vsprintf_chk.c,v 1.6 2009/02/05 05:39:38 lukem Exp $ */ |
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| 2 | |
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| 3 | /*- |
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| 4 | * Copyright (c) 2006 The NetBSD Foundation, Inc. |
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| 5 | * All rights reserved. |
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| 6 | * |
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| 7 | * This code is derived from software contributed to The NetBSD Foundation |
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| 8 | * by Christos Zoulas. |
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| 9 | * |
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| 10 | * Redistribution and use in source and binary forms, with or without |
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| 11 | * modification, are permitted provided that the following conditions |
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| 12 | * are met: |
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| 13 | * 1. Redistributions of source code must retain the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * |
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 29 | * POSSIBILITY OF SUCH DAMAGE. |
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| 30 | */ |
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| 31 | #include <sys/cdefs.h> |
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| 32 | __RCSID("$NetBSD: vsprintf_chk.c,v 1.6 2009/02/05 05:39:38 lukem Exp $"); |
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| 33 | |
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| 34 | /*LINTLIBRARY*/ |
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| 35 | |
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| 36 | #include <ssp/ssp.h> |
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| 37 | #include <stdio.h> |
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| 38 | #include <limits.h> |
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| 39 | #include <stdarg.h> |
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| 40 | #include <ssp/stdio.h> |
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| 41 | |
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| 42 | #undef vsprintf |
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| 43 | #undef vsnprintf |
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| 44 | |
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| 45 | /*ARGSUSED*/ |
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| 46 | int |
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| 47 | __vsprintf_chk(char * __restrict buf, int flags, size_t slen, |
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| 48 | const char * __restrict fmt, va_list ap) |
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| 49 | { |
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| 50 | int rv; |
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| 51 | |
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| 52 | if (slen > (size_t)INT_MAX) |
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| 53 | rv = vsprintf(buf, fmt, ap); |
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| 54 | else { |
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| 55 | if ((rv = vsnprintf(buf, slen, fmt, ap)) >= 0 && (size_t)rv >= slen) |
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| 56 | __chk_fail(); |
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| 57 | } |
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| 58 | |
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| 59 | return rv; |
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| 60 | } |
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