Sat, 20 Apr 2024 13:01:58 +0200
add more xattr malloc checks
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1 | /* |
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2 | * Copyright 2019 Olaf Wintermann |
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3 | * |
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4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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5 | * copy of this software and associated documentation files (the "Software"), |
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6 | * to deal in the Software without restriction, including without limitation |
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7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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8 | * and/or sell copies of the Software, and to permit persons to whom the |
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9 | * Software is furnished to do so, subject to the following conditions: |
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10 | * |
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11 | * The above copyright notice and this permission notice shall be included in |
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12 | * all copies or substantial portions of the Software. |
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13 | * |
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14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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17 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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19 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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20 | * DEALINGS IN THE SOFTWARE. |
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21 | */ |
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22 | |
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23 | #define _GNU_SOURCE |
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24 | |
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25 | #include <stdio.h> |
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26 | #include <stdlib.h> |
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27 | |
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28 | #include "libxattr.h" |
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29 | |
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30 | #include <errno.h> |
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31 | #include <sys/types.h> |
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32 | |
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33 | #include <string.h> |
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34 | |
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35 | #define LIST_BUF_LEN 1024 |
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36 | #define LIST_ARRAY_LEN 8 |
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37 | #define ATTR_BUF_LEN 1024 |
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38 | |
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39 | |
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40 | static int strarray_add(char ***array_ptr, size_t *pos, size_t *len, char *str) { |
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41 | char **array = *array_ptr; |
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42 | size_t array_pos = *pos; |
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43 | size_t array_len = *len; |
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44 | if(array_pos >= array_len) { |
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45 | size_t newlen = array_len * 2; |
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46 | char **new_array = realloc(array, newlen * sizeof(char*)); |
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47 | if(!new_array) { |
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48 | return 1; |
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49 | } |
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50 | *len = array_len; |
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51 | array = new_array; |
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52 | *array_ptr = new_array; |
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53 | } |
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54 | |
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55 | array[array_pos] = str; |
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56 | *pos = array_pos + 1; |
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57 | |
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58 | return 0; |
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59 | } |
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60 | |
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61 | static void strarray_free(char **array, size_t nelm) { |
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62 | for(size_t i=0;i<nelm;i++) { |
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63 | free(array[i]); |
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64 | } |
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65 | free(array); |
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66 | } |
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67 | |
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68 | #ifdef __linux__ |
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69 | #define XATTR_SUPPORTED |
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70 | #include <sys/xattr.h> |
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71 | |
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72 | static char ** parse_xattrlist(char *buf, ssize_t length, ssize_t *nelm) { |
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73 | size_t arraylen = LIST_ARRAY_LEN; |
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74 | size_t arraypos = 0; |
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75 | char **array = malloc(LIST_ARRAY_LEN * sizeof(char*)); |
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76 | if(!array) { |
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77 | *nelm = -1; |
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78 | return NULL; |
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79 | } |
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80 | |
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81 | char *begin = buf; |
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82 | char *name = NULL; |
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83 | for(int i=0;i<length;i++) { |
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84 | if(!name && buf[i] == '.') { |
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85 | name = buf + i + 1; |
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86 | } |
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87 | if(buf[i] == '\0') { |
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88 | char *attrname = strdup(name); |
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89 | if(!attrname) { |
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90 | strarray_free(array, arraypos); |
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91 | *nelm = -1; |
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92 | return NULL; |
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93 | } |
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94 | if(strarray_add(&array, &arraypos, &arraylen, attrname)) { |
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95 | strarray_free(array, arraypos); |
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96 | *nelm = -1; |
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97 | return NULL; |
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98 | } |
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99 | begin = buf + i + 1; |
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100 | name = 0; |
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101 | } |
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102 | } |
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103 | |
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104 | if(arraypos == 0) { |
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105 | free(array); |
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106 | array = NULL; |
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107 | } |
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108 | |
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109 | *nelm = arraypos; |
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110 | return array; |
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111 | } |
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112 | |
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113 | char ** xattr_list(const char *path, ssize_t *nelm) { |
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114 | char *list = malloc(LIST_BUF_LEN); |
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115 | if(!list) { |
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116 | *nelm = -1; |
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117 | return NULL; |
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118 | } |
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119 | ssize_t len = listxattr(path, list, LIST_BUF_LEN); |
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120 | if(len == -1) { |
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121 | switch(errno) { |
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122 | case ERANGE: { |
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123 | // buffer too, get size of attribute list |
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124 | ssize_t newlen = listxattr(path, NULL, 0); |
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125 | if(newlen > 0) { |
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126 | // second try |
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127 | char *new_list = realloc(list, newlen); |
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128 | if(!new_list) { |
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129 | free(list); |
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130 | *nelm = -1; |
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131 | return NULL; |
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132 | } |
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133 | list = new_list; |
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134 | len = listxattr(path, list, newlen); |
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135 | if(len != -1) { |
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136 | // this time it worked |
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137 | break; |
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138 | } |
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139 | } |
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140 | } |
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141 | default: { |
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142 | free(list); |
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143 | *nelm = -1; |
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144 | return NULL; |
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145 | } |
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146 | } |
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147 | } |
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148 | |
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149 | char **ret = parse_xattrlist(list, len, nelm); |
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150 | free(list); |
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151 | return ret; |
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152 | } |
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153 | |
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154 | static char* name2nsname(const char *name) { |
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155 | // add the 'user' namespace to the name |
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156 | size_t namelen = strlen(name); |
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157 | char *attrname = malloc(8 + namelen); |
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158 | if(!attrname) { |
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159 | return NULL; |
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160 | } |
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161 | memcpy(attrname, "user.", 5); |
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162 | memcpy(attrname+5, name, namelen + 1); |
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163 | return attrname; |
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164 | } |
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165 | |
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166 | char * xattr_get(const char *path, const char *attr, ssize_t *len) { |
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167 | char *attrname = name2nsname(attr); |
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168 | if(!attrname) { |
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169 | *len = -1; |
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170 | return NULL; |
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171 | } |
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172 | |
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173 | char *buf = malloc(ATTR_BUF_LEN); |
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174 | if(!buf) { |
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175 | *len = -1; |
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176 | free(attrname); |
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177 | return NULL; |
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178 | } |
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179 | ssize_t vlen = getxattr(path, attrname, buf, ATTR_BUF_LEN - 1); |
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180 | if(vlen < 0) { |
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181 | switch(errno) { |
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182 | case ERANGE: { |
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183 | ssize_t attrlen = getxattr(path, attrname, NULL, 0); |
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184 | if(attrlen > 0) { |
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185 | free(buf); |
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186 | buf = malloc(attrlen + 1); |
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187 | if(!buf) { |
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188 | *len = -1; |
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189 | free(attrname); |
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190 | return NULL; |
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191 | } |
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192 | vlen = getxattr(path, attrname, buf, attrlen); |
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193 | if(vlen > 0) { |
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194 | break; |
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195 | } |
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196 | } |
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197 | } |
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198 | default: { |
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199 | *len = -1; |
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200 | free(buf); |
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201 | free(attrname); |
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202 | return NULL; |
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203 | } |
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204 | } |
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205 | } |
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206 | buf[vlen] = 0; |
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207 | |
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208 | free(attrname); |
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209 | *len = vlen; |
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210 | return buf; |
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211 | } |
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212 | |
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213 | int xattr_set(const char *path, const char *name, const void *value, size_t len) { |
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214 | char *attrname = name2nsname(name); |
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215 | if(!attrname) { |
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216 | return 1; |
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217 | } |
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218 | int ret = setxattr(path, attrname, value, len, 0); |
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219 | free(attrname); |
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220 | return ret; |
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221 | } |
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222 | |
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223 | int xattr_remove(const char *path, const char *name) { |
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224 | char *attrname = name2nsname(name); |
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225 | if(!attrname) { |
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226 | return 1; |
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227 | } |
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228 | int ret = removexattr(path, attrname); |
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229 | free(attrname); |
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230 | return ret; |
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231 | } |
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232 | |
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233 | #endif /* Linux */ |
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234 | |
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235 | #ifdef __APPLE__ |
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236 | #define XATTR_SUPPORTED |
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237 | #include <sys/xattr.h> |
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238 | |
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239 | static char ** parse_xattrlist(char *buf, ssize_t length, ssize_t *nelm) { |
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240 | size_t arraylen = LIST_ARRAY_LEN; |
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241 | size_t arraypos = 0; |
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242 | char **array = malloc(LIST_ARRAY_LEN * sizeof(char*)); |
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243 | |
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244 | char *name = buf; |
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245 | for(int i=0;i<length;i++) { |
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246 | if(buf[i] == '\0') { |
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247 | char *attrname = strdup(name); |
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248 | if(strarray_add(&array, &arraypos, &arraylen, attrname)) { |
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249 | strarray_free(array, arraypos); |
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250 | *nelm = -1; |
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251 | return NULL; |
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252 | } |
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253 | name = buf + i + 1; |
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254 | } |
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255 | } |
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256 | |
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257 | if(arraypos == 0) { |
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258 | free(array); |
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259 | array = NULL; |
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260 | } |
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261 | |
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262 | *nelm = arraypos; |
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263 | return array; |
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264 | } |
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265 | |
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266 | char ** xattr_list(const char *path, ssize_t *nelm) { |
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267 | char *list = malloc(LIST_BUF_LEN); |
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268 | if(!list) { |
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269 | *nelm = -1; |
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270 | return NULL; |
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271 | } |
361
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272 | ssize_t len = listxattr(path, list, LIST_BUF_LEN, 0); |
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273 | if(len == -1) { |
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274 | switch(errno) { |
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275 | case ERANGE: { |
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276 | // buffer too, get size of attribute list |
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277 | ssize_t newlen = listxattr(path, NULL, 0, 0); |
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278 | if(newlen > 0) { |
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279 | // second try |
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280 | char *new_list = realloc(list, newlen); |
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281 | if(!new_list) { |
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282 | free(list); |
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283 | *nelm = -1; |
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284 | return NULL; |
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285 | } |
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286 | list = new_list; |
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287 | len = listxattr(path, list, newlen, 0); |
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288 | if(len != -1) { |
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289 | // this time it worked |
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290 | break; |
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291 | } |
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292 | } |
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293 | } |
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294 | default: { |
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295 | free(list); |
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296 | *nelm = -1; |
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297 | return NULL; |
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298 | } |
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299 | } |
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300 | } |
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301 | |
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302 | char **ret = parse_xattrlist(list, len, nelm); |
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303 | free(list); |
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304 | return ret; |
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305 | } |
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306 | |
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307 | char * xattr_get(const char *path, const char *attr, ssize_t *len) { |
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308 | // get attribute length |
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309 | ssize_t attrlen = getxattr(path, attr, NULL, 0, 0, 0); |
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310 | if(attrlen < 0) { |
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311 | *len = -1; |
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312 | return NULL; |
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313 | } |
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314 | |
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315 | char *buf = malloc(attrlen + 1); |
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316 | if(!buf) { |
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317 | *len = -1; |
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318 | return NULL; |
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319 | } |
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320 | ssize_t vlen = getxattr(path, attr, buf, attrlen, 0, 0); |
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321 | if(vlen < 0) { |
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322 | *len = -1; |
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323 | free(buf); |
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324 | return NULL; |
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325 | } |
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326 | buf[vlen] = 0; |
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327 | |
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328 | *len = vlen; |
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329 | return buf; |
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330 | } |
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331 | |
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332 | int xattr_set(const char *path, const char *name, const void *value, size_t len) { |
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333 | int ret = setxattr(path, name, value, len, 0, 0); |
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334 | return ret; |
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335 | } |
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336 | |
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337 | int xattr_remove(const char *path, const char *name) { |
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338 | return removexattr(path, name, 0); |
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339 | } |
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340 | |
361
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341 | #endif /* Apple */ |
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342 | |
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343 | #ifdef __sun |
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344 | #define XATTR_SUPPORTED |
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345 | #include <unistd.h> |
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346 | #include <sys/types.h> |
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347 | #include <sys/stat.h> |
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348 | #include <dirent.h> |
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349 | #include <fcntl.h> |
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350 | |
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351 | static int open_attrfile(const char *path, const char *attr, int oflag) { |
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352 | int file = open(path, O_RDONLY); |
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353 | if(file == -1) { |
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354 | return -1; |
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355 | } |
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356 | |
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357 | int attrfile = openat(file, attr, oflag, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH); |
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358 | close(file); |
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359 | return attrfile; |
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360 | } |
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361 | |
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362 | char ** xattr_list(const char *path, ssize_t *nelm) { |
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363 | *nelm = -1; |
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364 | |
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365 | int attrdir = open_attrfile(path, ".", O_RDONLY|O_XATTR); |
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366 | if(attrdir == -1) { |
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367 | return NULL; |
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368 | } |
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369 | |
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370 | DIR *dir = fdopendir(attrdir); |
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371 | if(!dir) { |
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372 | close(attrdir); |
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373 | return NULL; |
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374 | } |
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375 | |
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376 | size_t arraylen = LIST_ARRAY_LEN; |
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377 | size_t arraypos = 0; |
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378 | char **array = malloc(LIST_ARRAY_LEN * sizeof(char*)); |
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379 | if(!array) { |
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380 | closedir(dir); |
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381 | *nelm = -1; |
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382 | return NULL; |
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383 | } |
361
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384 | |
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385 | struct dirent *ent; |
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386 | while((ent = readdir(dir)) != NULL) { |
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387 | if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..") || !strcmp(ent->d_name, "SUNWattr_ro") || !strcmp(ent->d_name, "SUNWattr_rw")) { |
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388 | continue; |
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389 | } |
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|
390 | char *name = strdup(ent->d_name); |
813
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improve xattr code
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parents:
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diff
changeset
|
391 | if(strarray_add(&array, &arraypos, &arraylen, name)) { |
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|
392 | strarray_free(array, arraypos); |
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parents:
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diff
changeset
|
393 | *nelm = -1; |
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diff
changeset
|
394 | closedir(dir); |
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diff
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|
395 | return NULL; |
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|
396 | } |
361
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diff
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|
397 | } |
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parents:
diff
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|
398 | closedir(dir); |
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parents:
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|
399 | |
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parents:
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|
400 | *nelm = arraypos; |
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parents:
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|
401 | return array; |
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parents:
diff
changeset
|
402 | } |
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parents:
diff
changeset
|
403 | |
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parents:
diff
changeset
|
404 | char * xattr_get(const char *path, const char *attr, ssize_t *len) { |
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parents:
diff
changeset
|
405 | *len = -1; |
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adds xattr lib and tag support
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parents:
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changeset
|
406 | |
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parents:
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|
407 | int attrfile = open_attrfile(path, attr, O_RDONLY|O_XATTR); |
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parents:
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changeset
|
408 | if(attrfile == -1) { |
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parents:
diff
changeset
|
409 | return NULL; |
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parents:
diff
changeset
|
410 | } |
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parents:
diff
changeset
|
411 | |
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parents:
diff
changeset
|
412 | struct stat s; |
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parents:
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|
413 | if(fstat(attrfile, &s)) { |
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parents:
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|
414 | close(attrfile); |
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parents:
diff
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|
415 | return NULL; |
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parents:
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changeset
|
416 | } |
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parents:
diff
changeset
|
417 | |
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parents:
diff
changeset
|
418 | size_t bufsize = (size_t)s.st_size; |
765
305ce525ad4a
change libxattr xattr_get() to return null-terminated strings
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parents:
764
diff
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|
419 | char *buf = malloc(bufsize + 1); |
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06cf17795b86
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parents:
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|
420 | if(!buf) { |
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|
421 | close(attrfile); |
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|
422 | return NULL; |
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|
423 | } |
361
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|
424 | |
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parents:
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changeset
|
425 | char *b = buf; |
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parents:
diff
changeset
|
426 | size_t cur = 0; |
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parents:
diff
changeset
|
427 | while(cur < bufsize) { |
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parents:
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|
428 | ssize_t r = read(attrfile, buf + cur, bufsize - cur); |
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parents:
diff
changeset
|
429 | if(r <= 0) { |
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parents:
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|
430 | break; |
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parents:
diff
changeset
|
431 | } |
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parents:
diff
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|
432 | cur += r; |
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parents:
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changeset
|
433 | } |
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parents:
diff
changeset
|
434 | |
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parents:
diff
changeset
|
435 | close(attrfile); |
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parents:
diff
changeset
|
436 | if(cur != bufsize) { |
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parents:
diff
changeset
|
437 | free(buf); |
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parents:
diff
changeset
|
438 | return NULL; |
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parents:
diff
changeset
|
439 | } |
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parents:
diff
changeset
|
440 | |
813
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improve xattr code
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parents:
765
diff
changeset
|
441 | buf[cur] = 0; |
361
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parents:
diff
changeset
|
442 | *len = (ssize_t)bufsize; |
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parents:
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|
443 | return buf; |
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parents:
diff
changeset
|
444 | } |
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parents:
diff
changeset
|
445 | |
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parents:
diff
changeset
|
446 | int xattr_set(const char *path, const char *name, const void *value, size_t len) { |
369
4322b8953bd5
adds tag conflict detection for dav-sync push
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
364
diff
changeset
|
447 | int attrfile = open_attrfile(path, name, O_CREAT|O_WRONLY|O_XATTR|O_TRUNC); |
361
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parents:
diff
changeset
|
448 | if(attrfile == -1) { |
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parents:
diff
changeset
|
449 | return -1; |
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parents:
diff
changeset
|
450 | } |
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parents:
diff
changeset
|
451 | |
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parents:
diff
changeset
|
452 | const char *p = value; |
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parents:
diff
changeset
|
453 | size_t remaining = len; |
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parents:
diff
changeset
|
454 | while(remaining > 0) { |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
455 | ssize_t w = write(attrfile, p, remaining); |
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parents:
diff
changeset
|
456 | if(w <= 0) { |
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adds xattr lib and tag support
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parents:
diff
changeset
|
457 | break; |
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adds xattr lib and tag support
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parents:
diff
changeset
|
458 | } |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
459 | p += w; |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
460 | remaining -= w; |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
461 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
462 | |
b6f2462ee055
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parents:
diff
changeset
|
463 | close(attrfile); |
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parents:
diff
changeset
|
464 | |
b6f2462ee055
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parents:
diff
changeset
|
465 | return remaining > 0 ? -1 : 0; |
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parents:
diff
changeset
|
466 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
467 | |
379
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
468 | int xattr_remove(const char *path, const char *name) { |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
469 | int attrdir = open_attrfile(path, ".", O_RDONLY|O_XATTR); |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
470 | if(attrdir == -1) { |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
471 | return -1; |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
472 | } |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
473 | |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
474 | int ret = unlinkat(attrdir, name, 0); |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
475 | close(attrdir); |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
476 | return ret; |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
477 | } |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
478 | |
361
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parents:
diff
changeset
|
479 | #endif /* Sun */ |
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parents:
diff
changeset
|
480 | |
b6f2462ee055
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parents:
diff
changeset
|
481 | |
b6f2462ee055
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parents:
diff
changeset
|
482 | #ifdef __FreeBSD__ |
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parents:
diff
changeset
|
483 | #define XATTR_SUPPORTED |
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parents:
diff
changeset
|
484 | |
b6f2462ee055
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parents:
diff
changeset
|
485 | #include <sys/types.h> |
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adds xattr lib and tag support
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parents:
diff
changeset
|
486 | #include <sys/extattr.h> |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
487 | |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
488 | static char ** parse_xattrlist(char *buf, ssize_t length, ssize_t *nelm) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
489 | size_t arraylen = LIST_ARRAY_LEN; |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
490 | size_t arraypos = 0; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
491 | char **array = malloc(LIST_ARRAY_LEN * sizeof(char*)); |
813
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
492 | if(!array) { |
06cf17795b86
improve xattr code
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parents:
765
diff
changeset
|
493 | *nelm = -1; |
06cf17795b86
improve xattr code
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parents:
765
diff
changeset
|
494 | return NULL; |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
495 | } |
361
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
496 | |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
497 | for(int i=0;i<length;i++) { |
813
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
498 | int namelen = buf[i]; |
361
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
499 | char *name = buf + i + 1; |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
500 | char *attrname = malloc(namelen + 1); |
813
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
501 | if(!attrname) { |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
502 | strarray_free(array, arraypos); |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
503 | *nelm = -1; |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
504 | return NULL; |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
505 | } |
361
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
506 | memcpy(attrname, name, namelen); |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
507 | attrname[namelen] = 0; |
813
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
508 | if(strarray_add(&array, &arraypos, &arraylen, attrname)) { |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
509 | strarray_free(array, arraypos); |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
510 | *nelm = -1; |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
511 | return NULL; |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
512 | } |
361
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adds xattr lib and tag support
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parents:
diff
changeset
|
513 | i += namelen; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
514 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
515 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
516 | if(arraypos == 0) { |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
517 | free(array); |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
518 | array = NULL; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
519 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
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|
520 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
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|
521 | *nelm = arraypos; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
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|
522 | return array; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
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|
523 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
524 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
525 | char ** xattr_list(const char *path, ssize_t *nelm) { |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
526 | *nelm = -1; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
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|
527 | ssize_t lslen = extattr_list_file(path, EXTATTR_NAMESPACE_USER, NULL, 0); |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
528 | if(lslen <= 0) { |
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adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
529 | if(lslen == 0) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
530 | *nelm = 0; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
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|
531 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
532 | return NULL; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
533 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
534 | |
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adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
535 | char *list = malloc(lslen); |
813
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
536 | if(!list) { |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
537 | return NULL; |
06cf17795b86
improve xattr code
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
765
diff
changeset
|
538 | } |
361
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adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
539 | ssize_t len = extattr_list_file(path, EXTATTR_NAMESPACE_USER, list, lslen); |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
540 | if(len == -1) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
541 | free(list); |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
542 | return NULL; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
543 | } |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
544 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
545 | char **ret = parse_xattrlist(list, len, nelm); |
b6f2462ee055
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Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
546 | free(list); |
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parents:
diff
changeset
|
547 | return ret; |
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adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
548 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
549 | |
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adds xattr lib and tag support
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parents:
diff
changeset
|
550 | char * xattr_get(const char *path, const char *attr, ssize_t *len) { |
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adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
551 | // get attribute length |
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adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
552 | ssize_t attrlen = extattr_get_file(path, EXTATTR_NAMESPACE_USER, attr, NULL, 0); |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
553 | if(attrlen < 0) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
554 | *len = -1; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
555 | return NULL; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
556 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
557 | |
765
305ce525ad4a
change libxattr xattr_get() to return null-terminated strings
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
764
diff
changeset
|
558 | char *buf = malloc(attrlen + 1); |
361
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adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
559 | ssize_t vlen = extattr_get_file(path, EXTATTR_NAMESPACE_USER, attr, buf, attrlen); |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
560 | if(vlen < 0) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
561 | *len = -1; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
562 | free(buf); |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
563 | return NULL; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
564 | } |
765
305ce525ad4a
change libxattr xattr_get() to return null-terminated strings
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
764
diff
changeset
|
565 | buf[attrlen] = 0; |
361
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
566 | *len = vlen; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
567 | return buf; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
568 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
569 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
570 | int xattr_set(const char *path, const char *name, const void *value, size_t len) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
571 | int ret = extattr_set_file(path, EXTATTR_NAMESPACE_USER, name, value, len); |
764
a41b18c67d95
fix xattr_set on FreeBSD
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
389
diff
changeset
|
572 | return ret >= 0 ? 0 : ret; |
361
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
573 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
574 | |
379
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
575 | int xattr_remove(const char *path, const char *name) { |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
576 | return extattr_delete_file(path, EXTATTR_NAMESPACE_USER, name); |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
577 | } |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
578 | |
361
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
579 | #endif /* FreeBSD */ |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
580 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
581 | |
b6f2462ee055
adds xattr lib and tag support
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parents:
diff
changeset
|
582 | #ifndef XATTR_SUPPORTED |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
583 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
584 | char ** xattr_list(const char *path, ssize_t *nelm) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
585 | *nelm = -1; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
586 | return NULL; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
587 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
588 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
589 | char * xattr_get(const char *path, const char *attr, ssize_t *len) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
590 | *len = -1; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
591 | return NULL; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
592 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
593 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
594 | int xattr_set(const char *path, const char *name, const void *value, size_t len) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
595 | return -1; |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
596 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
597 | |
379
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
598 | int xattr_remove(const char *path, const char *name) { |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
599 | return -1; |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
600 | } |
cdaf5a3d3a50
fixes tag syncing
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
369
diff
changeset
|
601 | |
361
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
602 | #endif /* unsupported platform */ |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
603 | |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
604 | void xattr_free_list(char **attrnames, ssize_t nelm) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
605 | if(attrnames) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
606 | for(int i=0;i<nelm;i++) { |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
607 | free(attrnames[i]); |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
608 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
609 | free(attrnames); |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
610 | } |
b6f2462ee055
adds xattr lib and tag support
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff
changeset
|
611 | } |