1 | /* $NetBSD: strcat_chk.c,v 1.5 2014/09/17 00:39:28 joerg 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: strcat_chk.c,v 1.5 2014/09/17 00:39:28 joerg 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 <string.h> |
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38 | |
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39 | char *__strcat_chk(char * __restrict, const char * __restrict, size_t); |
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40 | |
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41 | char * |
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42 | __strcat_chk(char * __restrict dst, const char * __restrict src, size_t slen) |
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43 | { |
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44 | char *d; |
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45 | |
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46 | for (d = dst; *d; d++) { |
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47 | if (slen-- == 0) |
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48 | __chk_fail(); |
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49 | } |
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50 | |
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51 | while (*src) { |
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52 | if (slen-- == 0) |
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53 | __chk_fail(); |
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54 | *d++ = *src++; |
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55 | } |
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56 | |
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57 | if (slen-- == 0) |
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58 | __chk_fail(); |
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59 | |
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60 | *d = '\0'; |
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61 | return dst; |
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62 | } |
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