1 kumpf 1.2 /*
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2 martin 1.5 //%LICENSE////////////////////////////////////////////////////////////////
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3 martin 1.6 //
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4 martin 1.5 // Licensed to The Open Group (TOG) under one or more contributor license
5 // agreements. Refer to the OpenPegasusNOTICE.txt file distributed with
6 // this work for additional information regarding copyright ownership.
7 // Each contributor licenses this file to you under the OpenPegasus Open
8 // Source License; you may not use this file except in compliance with the
9 // License.
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10 martin 1.6 //
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11 martin 1.5 // Permission is hereby granted, free of charge, to any person obtaining a
12 // copy of this software and associated documentation files (the "Software"),
13 // to deal in the Software without restriction, including without limitation
14 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 // and/or sell copies of the Software, and to permit persons to whom the
16 // Software is furnished to do so, subject to the following conditions:
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17 martin 1.6 //
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18 martin 1.5 // The above copyright notice and this permission notice shall be included
19 // in all copies or substantial portions of the Software.
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20 martin 1.6 //
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21 martin 1.5 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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22 martin 1.6 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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23 martin 1.5 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
24 // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
25 // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
26 // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
27 // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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28 martin 1.6 //
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29 martin 1.5 //////////////////////////////////////////////////////////////////////////
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30 kumpf 1.2 */
31
32 #ifndef _Executor_Strlcat_h
33 #define _Executor_Strlcat_h
34
35 #include <stdlib.h>
36
37 /*
38 **==============================================================================
39 **
40 ** Strlcat()
41 **
42 ** This is an original implementation of the strlcat() function as described
43 ** by Todd C. Miller in his popular security paper entitled "strlcpy and
44 ** strlcat - consistent, safe, string copy and concatenation".
45 **
46 ** Note that this implementation favors readability over efficiency. More
47 ** efficient implementations are possible but would be too complicated
48 ** to verify in a security audit.
49 **
50 **==============================================================================
51 kumpf 1.2 */
52
53 static size_t Strlcat(char* dest, const char* src, size_t size)
54 {
55 size_t i;
56 size_t j;
57
58 /* Find dest null terminator. */
59
60 for (i = 0; i < size && dest[i]; i++)
61 ;
62
63 /* If no-null terminator found, return size. */
64
65 if (i == size)
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66 kumpf 1.3 {
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67 kumpf 1.4 int k = 0;
68 while (src[k])
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69 kumpf 1.3 {
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70 kumpf 1.4 k++;
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71 kumpf 1.3 }
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72 kumpf 1.4 return size + k;
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73 kumpf 1.3 }
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74 kumpf 1.2
75 /* Copy src characters to dest. */
76
77 for (j = 0; src[j] && i + 1 < size; i++, j++)
78 dest[i] = src[j];
79
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80 kumpf 1.3 /* Null terminate the destination. We are guaranteed that size is
81 * non-zero, because the (i == size) condition above is always true
82 * when size is zero.
83 */
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84 kumpf 1.2
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85 kumpf 1.3 dest[i] = '\0';
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86 kumpf 1.2
87 while (src[j])
88 {
89 j++;
90 i++;
91 }
92
93 return i;
94 }
95
96 #endif /* _Executor_Strlcat_h */
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