Mercurial > trustbridge

annotate cinst/main.c @ 157:a46a4b443410

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Use strtok instead of strsep for portability.
author Sascha Wilde <wilde@intevation.de>
date Tue, 25 Mar 2014 09:30:42 +0100
parents 4904fe01055d
children 095d0e7f8ed4
rev   line source
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1 /**
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2 * @file main.c
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3 * @brief Main entry point for the cinst process.
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4 *
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5 * The cinst process may or may not be run with elevated
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6 * privileges. When run with elevated privileges this
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7 * process will modify system wide certificate stores.
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8 * Otherwise only the users certificate stores are modified.
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9 *
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10 * It expects a certificatelist on stdin enclosed in a
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11 * -----BEGIN CERTIFICATE LIST-----
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12 * ...
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13 * -----END CERTIFICATE LIST-----
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14 *
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15 * Followed by additional instruction lines of:
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16 * I:<certificate>
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17 * R:<certificate>
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18 *
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19 * It will only execute the instructions if the
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20 * I and R instructions are also part of the signed
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21 * certificate list. The signature is validated with the
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22 * built in key.
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23 *
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24 * The special instruction "UNINSTALL" will cause the installer
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25 * to remove all certificates (Even those marked with I) that
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26 * are part of the list to be removed.
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27 *
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28 **/
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31 #include <string.h>
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32 #include <assert.h>
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33
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34 #include "strhelp.h"
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35 #include "listutil.h"
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36 #include "errorcodes.h"
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37 #include "windowsstore.h"
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38
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39 /* The certificate list + instructions may only be so long as
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40 * twice the accepted certificatelist size */
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41 #define MAX_INPUT_SIZE MAX_LINE_LENGTH * MAX_LINES * 2
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42
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43 /* @brief Read stdin into data structures.
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44 *
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45 * Reads from stdin and sorts the input into the respective
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46 * variables. The pointers returned need to be freed by the caller.
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47 * Terminates in OOM conditions.
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48 *
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49 * The caller needs to free the memory allocated by this function
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50 * even when an error is returned.
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51 *
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52 * @returns: 0 on success. An error code otherwise.
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53 */
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54 int readInput(char **certificate_list, char ***to_install,
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55 char ***to_remove)
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56 {
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57 int lines_read = 0;
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58 int readingList = 0;
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59 size_t list_size = 0;
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60 char buf[MAX_LINE_LENGTH + 2];
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61
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62 if (*certificate_list || *to_install || *to_remove) {
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63 printf("Error invalid parameters\n");
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64 return -1;
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65 }
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66
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67 while (fgets(buf, MAX_LINE_LENGTH + 1, stdin)) {
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68 size_t len = strlen(buf); /* fgets ensures buf is terminated */
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69 if (len <= 3) {
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70 printf("Line too short.\n");
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71 return ERR_INVALID_INPUT;
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72 }
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73 if (lines_read ++ > MAX_LINES) {
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74 printf("Too many lines\n");
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75 return ERR_TOO_MUCH_INPUT;
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76 }
126
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77
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78 if (buf[len-2] != '\r') {
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79 if (buf[len-1] != '\n') {
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80 printf("Line too long.\n");
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81 return ERR_INVALID_INPUT;
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82 }
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83 buf[len-1] = '\r';
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84 buf[len] = '\n';
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85 buf[len+1] = '\0';
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86 len++;
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87 }
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88
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89 if (strcmp("-----BEGIN CERTIFICATE LIST-----\r\n", buf) == 0){
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90 readingList = 1;
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91 continue;
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92 }
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93 if (strcmp("-----END CERTIFICATE LIST-----\r\n", buf) == 0){
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94 readingList = 0;
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95 continue;
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96 }
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97 if (readingList) {
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98 str_append_str(certificate_list, &list_size, buf, len);
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99 continue;
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100 }
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101 if (*buf == 'I') {
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102 /* Remove leading I: and trailing \r\n */
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103 strv_append(to_install, buf+2, len - 4);
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104 continue;
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105 }
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106 if (*buf == 'R') {
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107 /* Remove leading R: and trailing \r\n */
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108 strv_append(to_remove, buf+2, len - 4);
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109 continue;
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110 }
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111 if (strcmp("UNINSTALL", buf) == 0) {
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112 /* Remove trailing \r\n */
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113 strv_append(to_remove, buf, len - 2);
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114 }
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115 }
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116
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117 return 0;
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118 }
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119 /*
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120 int validate_instructions(const char *certificate_list,
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121 const size_t list_len,
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122 const char **to_install,
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123 const char **to_remove)
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124 {
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125 TODO
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126 (void *) certificate_list;
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127 (void **) to_install;
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128 (void **) to_remove;
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129 (void) list_len;
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130
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131 return 0;
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132 }
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133 */
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134
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135 int main() {
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136 char **to_install = NULL;
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137 char **to_remove = NULL;
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138 char *certificate_list = NULL;
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139 size_t list_len = 0;
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140 int ret = -1;
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141 /*
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142 i = 0 ,
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143 uninstall = 0;
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144 */
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145 ret = readInput(&certificate_list, &to_install, &to_remove);
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146
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147 if (ret != 0) {
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148 return ret;
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149 }
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150
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151 if (!certificate_list) {
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152 return ERR_INVALID_INPUT_NO_LIST;
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153 }
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154
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155 list_len = strnlen(certificate_list, MAX_INPUT_SIZE);
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156
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157 ret = verify_list(certificate_list, list_len);
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158
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159 if (ret != 0) {
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160 return ERR_INVALID_SIGNATURE;
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161 }
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162
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163 if (!strv_length(to_install) && !strv_length(to_remove)) {
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164 return ERR_NO_INSTRUCTIONS;
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165 }
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166
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167
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168 /* Check that the instructions are ok to execute
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169 ret = validate_instructions(certificate_list, list_len, to_install,
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170 to_remove);
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171 if (ret != 0) {
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172 return ERR_INVALID_INSTRUCTIONS;
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173 }
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174
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175 if (to_remove) {
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176 for (i=0; to_remove[i]; i++) {
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177 if (strncmp("UNINSTALL", to_remove[i], MAX_LINE_LENGTH)) {
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178 uninstall = 1;
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179 break;
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180 }
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181 }
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182 }
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183
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184 if (uninstall) {
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185
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186 }
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187 */
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188
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189 #ifdef WIN32
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190 return install_certificates_win((const char**) to_install, 1);
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191 //remove_certificates_win((const char**) to_remove, 1);
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192 #endif
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193
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194 /* Make valgrind happy */
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195 strv_free(to_install);
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196 strv_free(to_remove);
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197 free(certificate_list);
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198
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199 return 0;
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200 }
http://wald.intevation.org/projects/trustbridge/