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annotate cinst/main.c @ 289:9ad00a3255f4

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Change cinst from stdin input to use arguments. As we have to execute this process on Windows over the shell a stdin / stdout communication is not really possible without some major hacks. So you now have to supply an instructions file and the path to the certificatelist as arguments when this process is called
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 02 Apr 2014 13:52:02 +0000
parents 4de97f74d038
children b460d2cf088d
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 * The first parameter to this process should be list=<file_name>
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11 * of the certificate list to work on. The second parameter should
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12 * be instruction=<instruction_file_name>|uninstall
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13 *
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14 * instruction_file_name should be the absolute path to an
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15 * instructions file formatted as:
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16 *
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17 * I:<certificate>
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18 * R:<certificate>
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19 *
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20 * Line breaks can be system dependent in the Instructions file.
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21 *
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22 * It will only execute the instructions if the
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23 * I and R instructions are also part of the signed
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24 * certificate list. The signature is validated with the
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25 * built in key.
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26 *
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27 * The special instruction "uninstall" will cause the installer
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28 * to remove all certificates (Even those marked with I) that
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29 * are part of the list.
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30 *
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31 **/
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32 #include <stdio.h>
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33 #include <stdlib.h>
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34 #include <string.h>
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35 #include <assert.h>
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36 #include <stdbool.h>
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38 #include "strhelp.h"
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39 #include "listutil.h"
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40 #include "logging.h"
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41 #include "errorcodes.h"
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42 #include "windowsstore.h"
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43
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44 /* The certificate list + instructions may only be so long as
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45 * twice the accepted certificatelist size */
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46 #define MAX_INPUT_SIZE MAX_LINE_LENGTH * MAX_LINES * 2
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47
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48 /* @brief Read stdin into data structures.
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49 *
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50 * Reads instructions from an input file into the to_install
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51 * and to_remove buffers.
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52 *
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53 * Lines starting with I: are treated as install instructions.
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54 * Lines starting with R: are treated as remove instructions.
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55 * Other lines are ignored.
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56 *
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57 * Terminates in OOM conditions.
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58 *
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59 * The caller needs to free the memory allocated by this function
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60 * even when an error is returned.
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61 *
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62 * @param[in] file_name absolute path to the instructions file.
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63 * @param[out] to_install strv of installation instructions or NULL
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64 * @param[out] to_remove strv of remove instructions or NULL
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65 *
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66 * @returns: 0 on success. An error code otherwise.
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67 */
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68 static int
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69 read_instructions_file (char *file_name, char ***to_install,
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70 char ***to_remove)
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71 {
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72 int lines_read = 0;
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73 char buf[MAX_LINE_LENGTH + 2];
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74 FILE *f = NULL;
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75 long file_size;
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76
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77 if (*to_install || *to_remove)
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78 {
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79 printf ("Error invalid parameters.\n");
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80 return -1;
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81 }
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82
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83 f = fopen (file_name, "rb");
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84 if (f == NULL)
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85 return ERR_NO_INSTRUCTIONS;
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86
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87 fseek (f, 0, SEEK_END);
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88 file_size = ftell (f);
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89 if (file_size <= 0)
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90 {
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91 fclose (f);
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92 return ERR_NO_INSTRUCTIONS;
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93 }
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94
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95 fseek (f, 0, SEEK_SET);
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96
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97 if (file_size + 1 == 0)
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98 {
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99 fclose (f);
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100 return ERR_INVALID_INSTRUCTIONS;
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101 }
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102
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103 while (fgets (buf, MAX_LINE_LENGTH + 1, f) )
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104 {
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105 size_t len = strlen (buf); /* fgets ensures buf is terminated */
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106 if (len <= 3)
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107 {
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108 printf ("Line too short.\n");
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109 return ERR_INVALID_INPUT;
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110 }
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111 if (lines_read++ > MAX_LINES)
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112 {
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113 printf ("Too many lines\n");
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114 return ERR_TOO_MUCH_INPUT;
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115 }
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116 if (*buf == 'I')
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117 {
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118 /* Remove leading I: and trailing \n */
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119 strv_append (to_install, buf + 2, len - 3);
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120 continue;
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121 }
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122 if (*buf == 'R')
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123 {
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124 /* Remove leading R: and trailing \n */
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125 strv_append (to_remove, buf + 2, len - 3);
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126 continue;
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127 }
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128 }
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129
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130 return 0;
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131 }
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132
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133 /** @brief Check that the insturctions match to the list
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134 *
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135 * Only certificates part of the certificate_list are allowed
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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diff changeset
136 * for installation.
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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parents: 137
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137 *
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138 * @param[in] all_certs strv of all valid certificates in a list
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139 * @param[in] to_validate strv of instructions
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140 *
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141 * @returns 0 on success, an error otherwise
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142 */
163
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143 int
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144 validate_instructions (char **all_certs, char **to_validate)
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
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145 {
163
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diff changeset
146 int i = 0, j = 0;
148
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147
163
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148 if (!all_certs || strv_length (all_certs) < 1)
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diff changeset
149 {
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150 /* Invalid parameters */
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diff changeset
151 return -1;
148
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152 }
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153
163
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154 if (to_validate == NULL)
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155 {
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156 /* Nothing is valid */
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157 return 0;
148
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158 }
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159
163
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160 for (i = 0; to_validate[i]; i++)
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161 {
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162 bool found = false;
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163 for (j = 0; all_certs[j]; j++)
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164 {
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165 if (strncmp (to_validate[i], all_certs[j], MAX_LINE_LENGTH - 2) ==
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166 0)
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167 {
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168 found = true;
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169 break;
148
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170 }
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171 }
163
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172 if (!found)
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173 {
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174 printf ("Install instruction with invalid certificate\n.");
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175 return ERR_INVALID_INSTRUCTIONS;
148
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176 }
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177 }
65
e4088afd5281 Comment out validate instructions for now to avoid unused warnings
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178
163
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179 return 0;
64
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180 }
148
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181
68
8ffbb48528ae Add certificate installation for windows
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parents: 65
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182
163
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183 int
289
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184 main (int argc, char **argv)
163
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185 {
289
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186 /* TODO handle wchar arguments on Windows or do conversion dance */
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187 char **to_install = NULL,
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188 **to_remove = NULL,
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189 **all_valid_certs = NULL;
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190 int ret = -1;
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191
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192 char *certificate_list = NULL,
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193 *certificate_file_name = NULL,
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194 *instruction_file_name = NULL;
163
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195 size_t list_len = 0;
289
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196 list_status_t list_status;
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197 bool do_uninstall = false;
60
6acb1dae6185 Use strn functions and improve error handling.
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198
289
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199 /* Some very static argument parsing. list= and instructions= is only
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200 added to make it more transparent how this programm is called if
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201 a user looks at the detailed uac dialog. */
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202 if (argc != 3 || strncmp(argv[1], "list=", 5) != 0 ||
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203 strncmp(argv[2], "instructions=", 13) != 0)
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204 {
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205 ERRORPRINTF ("Invalid arguments.\n"
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206 "Expected arguments: list=<certificate_list> \n"
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207 " instructions=<instructions_file>|uninstall\n");
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208 return ERR_INVALID_PARAMS;
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209 }
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diff changeset
210
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211 certificate_file_name = strchr(argv[1], '=') + 1;
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212 instruction_file_name = strchr(argv[2], '=') + 1;
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diff changeset
213
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diff changeset
214 if (!certificate_file_name || !instruction_file_name)
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diff changeset
215 {
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216 ERRORPRINTF ("Invalid arguments.\n"
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diff changeset
217 "Expected arguments: list=<certificate_list> \n"
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diff changeset
218 " instructions=<instructions_file>|uninstall\n");
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diff changeset
219 return ERR_INVALID_PARAMS;
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diff changeset
220 }
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diff changeset
221
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diff changeset
222 if (strncmp(instruction_file_name, "uninstall", 9) == 0)
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parents: 247
diff changeset
223 {
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
224 do_uninstall = true;
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diff changeset
225 instruction_file_name = NULL;
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diff changeset
226 }
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diff changeset
227
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228 list_status = read_and_verify_list (certificate_file_name, &certificate_list,
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diff changeset
229 &list_len);
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diff changeset
230
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
231 if (list_status != Valid)
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parents: 247
diff changeset
232 {
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
233 if (list_status == InvalidSignature)
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Andre Heinecke <aheinecke@intevation.de>
parents: 247
diff changeset
234 {
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
235 return ERR_INVALID_SIGNATURE;
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
236 }
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parents: 247
diff changeset
237
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
238 return ERR_INVALID_INPUT_NO_LIST;
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parents: 247
diff changeset
239 }
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diff changeset
240
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diff changeset
241 all_valid_certs = get_certs_from_list (certificate_list, list_len);
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parents: 247
diff changeset
242
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parents: 247
diff changeset
243 if (!all_valid_certs)
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Andre Heinecke <aheinecke@intevation.de>
parents: 247
diff changeset
244 {
9ad00a3255f4 Change cinst from stdin input to use arguments.
Andre Heinecke <aheinecke@intevation.de>
parents: 247
diff changeset
245 /* Impossible */
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parents: 247
diff changeset
246 return -1;
9ad00a3255f4 Change cinst from stdin input to use arguments.
Andre Heinecke <aheinecke@intevation.de>
parents: 247
diff changeset
247 }
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
248
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
249
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
250 #ifdef WIN32
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parents: 247
diff changeset
251 /* For uninstall we are done now */
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parents: 247
diff changeset
252 if (do_uninstall)
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
253 {
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
254 return write_stores_win (NULL, all_valid_certs);
9ad00a3255f4 Change cinst from stdin input to use arguments.
Andre Heinecke <aheinecke@intevation.de>
parents: 247
diff changeset
255 }
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
256 #endif
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
257
9ad00a3255f4 Change cinst from stdin input to use arguments.
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diff changeset
258 ret = read_instructions_file (instruction_file_name, &to_install,
9ad00a3255f4 Change cinst from stdin input to use arguments.
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parents: 247
diff changeset
259 &to_remove);
148
095d0e7f8ed4 Add instruction verification and handle uninstall command in input
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parents: 137
diff changeset
260
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
Andre Heinecke <aheinecke@intevation.de>
parents: 161
diff changeset
261 if (ret)
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
Andre Heinecke <aheinecke@intevation.de>
parents: 161
diff changeset
262 {
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
Andre Heinecke <aheinecke@intevation.de>
parents: 161
diff changeset
263 return ret;
60
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
264 }
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
265
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
Andre Heinecke <aheinecke@intevation.de>
parents: 161
diff changeset
266 if (!strv_length (to_install) && !strv_length (to_remove) )
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
Andre Heinecke <aheinecke@intevation.de>
parents: 161
diff changeset
267 {
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
Andre Heinecke <aheinecke@intevation.de>
parents: 161
diff changeset
268 return ERR_NO_INSTRUCTIONS;
64
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
269 }
fb9f78f7ab2f Improve error handling free memory before exiting. Include line endings in Marker lines
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
270
163
8cfcd38a9bb3 Change coding style for cinst main / windowsstore to GNU
Andre Heinecke <aheinecke@intevation.de>
parents: 161
diff changeset
271 /* Check that the instructions are ok to execute */
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272 if (to_install)
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273 {
289
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274 ret = validate_instructions (all_valid_certs, to_install);
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275 if (ret)
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276 {
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277 return ret;
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278 }
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279 }
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280
163
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281 if (to_remove)
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282 {
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283 ret = validate_instructions (all_valid_certs, to_remove);
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284 if (ret)
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285 {
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286 return ret;
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287 }
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288 }
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289
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290 #ifdef WIN32
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291 return write_stores_win (to_install, to_remove);
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292 #endif
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293
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294 /* Make valgrind happy */
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295 strv_free (to_install);
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296 strv_free (to_remove);
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297 free (certificate_list);
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298
163
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299 return 0;
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300 }
http://wald.intevation.org/projects/trustbridge/