[461541a] | 1 | |
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| 2 | /* abac_util.c */ |
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| 3 | |
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[7f25a67f] | 4 | #include <err.h> |
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| 5 | #include <stdlib.h> |
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| 6 | #include <string.h> |
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[461541a] | 7 | #include <assert.h> |
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| 8 | #include <ctype.h> |
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[c5720ad] | 9 | #include <stdio.h> |
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[7f25a67f] | 10 | |
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[f2622ee] | 11 | #include <abac_util.h> |
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| 12 | |
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[7f25a67f] | 13 | /** |
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| 14 | * Malloc, fatal on error. |
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| 15 | */ |
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[3c251d0] | 16 | void *abac_xmalloc(size_t size) { |
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[7f25a67f] | 17 | void *ret; |
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| 18 | |
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| 19 | ret = malloc(size); |
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| 20 | if (ret == NULL) |
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| 21 | err(1, "malloc"); |
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| 22 | |
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| 23 | return ret; |
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| 24 | } |
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| 25 | |
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[f2622ee] | 26 | void abac_chunk_free(abac_chunk_t chunk) |
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| 27 | { |
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| 28 | if(chunk.len) |
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| 29 | free(chunk.ptr); |
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| 30 | chunk.len=0; |
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| 31 | chunk.ptr=NULL; |
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| 32 | } |
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| 33 | |
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[8164e70] | 34 | abac_chunk_t abac_chunk_dup(char *ptr, int len) |
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| 35 | { |
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| 36 | abac_chunk_t chunk; |
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| 37 | if(len!=0) { |
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| 38 | chunk.ptr=(unsigned char *) abac_xstrdup(ptr); |
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| 39 | chunk.len=len; |
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| 40 | } else { |
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| 41 | chunk.ptr=NULL; |
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| 42 | chunk.len=0; |
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| 43 | } |
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| 44 | return chunk; |
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| 45 | } |
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| 46 | |
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| 47 | abac_chunk_t abac_chunk_new(char *ptr, int len) |
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| 48 | { |
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| 49 | abac_chunk_t chunk; |
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| 50 | if(len!=0) { |
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| 51 | chunk.ptr=(unsigned char *) ptr; |
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| 52 | chunk.len=len; |
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| 53 | } else { |
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| 54 | chunk.ptr=NULL; |
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| 55 | chunk.len=0; |
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| 56 | } |
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| 57 | return chunk; |
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| 58 | } |
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| 59 | |
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| 60 | int abac_chunk_null(abac_chunk_t chunk) |
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| 61 | { |
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| 62 | if(chunk.ptr==NULL) return 1; |
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| 63 | return 0; |
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| 64 | } |
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| 65 | |
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[c5720ad] | 66 | int abac_chunk_show(abac_chunk_t chunk) |
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| 67 | { |
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| 68 | if(chunk.ptr==NULL) |
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| 69 | fprintf(stderr,"abac_chunk_show: chunk is NULL\n"); |
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| 70 | fprintf(stderr,"abac_chunk_show: chunk is not NULL (%ld)\n",(long)chunk.ptr); |
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| 71 | } |
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| 72 | |
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[7f25a67f] | 73 | /** |
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| 74 | * strdup fatal on error |
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| 75 | */ |
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[3c251d0] | 76 | char *abac_xstrdup(char *source) { |
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[7f25a67f] | 77 | char *ret; |
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| 78 | |
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[ff3d104] | 79 | if (source == NULL) |
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| 80 | return NULL; |
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| 81 | |
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[7f25a67f] | 82 | ret = strdup(source); |
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| 83 | if (ret == NULL) |
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| 84 | err(1, "strdup"); |
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| 85 | |
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| 86 | return ret; |
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| 87 | } |
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[9a411d7] | 88 | |
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[461541a] | 89 | void *abac_xrealloc(void *ptr, size_t size) { |
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| 90 | void *ret = realloc(ptr, size); |
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| 91 | if (ret == NULL) |
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[1bf0f03] | 92 | err(1, "couldn't realloc %zu bytes\n", size); |
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[461541a] | 93 | return ret; |
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| 94 | } |
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| 95 | |
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[9a411d7] | 96 | /** |
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[9f78e4c] | 97 | * Split a string based on the given delimiter. The substrings are pointers |
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| 98 | * into string, which has string terminators added to slice it into substrings. |
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| 99 | * Do not free the returned substrings. num passes in the maximum number of |
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| 100 | * substrings to create and is returned as the number actually created. |
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[9a411d7] | 101 | */ |
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[9f78e4c] | 102 | #define MAXSPLIT 1024 |
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[9a411d7] | 103 | void abac_split(char *string, char *delim, char **ret, int *num) { |
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| 104 | int len = strlen(delim); |
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| 105 | char *start = string; |
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| 106 | int count = 0; |
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[9f78e4c] | 107 | int lim = (num && *num > 0) ? *num : MAXSPLIT; |
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[9a411d7] | 108 | |
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[9f78e4c] | 109 | // split the string by the delim. Split into at most lim parts |
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| 110 | while ((start = strstr(string, delim)) != NULL && count < lim-1) { |
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[9a411d7] | 111 | *start = 0; |
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| 112 | ret[count++] = string; |
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| 113 | string = start + len; |
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| 114 | } |
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| 115 | ret[count++] = string; |
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| 116 | |
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| 117 | *num = count; |
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| 118 | } |
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[461541a] | 119 | |
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| 120 | int abac_clean_name(char *string) { |
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| 121 | int i; |
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| 122 | |
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| 123 | assert(string != NULL); |
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| 124 | |
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| 125 | // must start with a letter/number |
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| 126 | if (!isalnum(string[0])) return 0; |
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| 127 | |
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| 128 | // Name must be alphanumeric or - or _ or : |
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| 129 | for (i = 1; string[i] != '\0'; ++i) |
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| 130 | if (!isalnum(string[i]) && string[i] != '-' && string[i] != '_' && |
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| 131 | string[i] != ':') |
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| 132 | return 0; |
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| 133 | |
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| 134 | return 1; |
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| 135 | } |
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| 136 | |
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