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annotate lwar/main.c @ 273:1409debcb1a0
Fix crash on listing when nested noexpand macros are used
Macros flagged noexpand were causing a segfault during listing. The problem
was incorrect accounting for nesting levels for noexpand macros causing the
listing handler to fall off the end of the program in certain circumstances
and in other circumstances it would fail to suppress expansion. Both the
segfault in the case of misbehaviour and the misbhaviour itself are
corrected with this update.
If you do not use nested noexpand macros, this bug has no effect.
author | William Astle <lost@l-w.ca> |
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date | Sat, 25 May 2013 13:35:46 -0600 |
parents | 6eed14cccac9 |
children | 4130ffdeb5c8 |
rev | line source |
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0
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1 /* |
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2 main.c |
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3 Copyright © 2009 William Astle |
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4 |
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5 This file is part of LWAR. |
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6 |
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7 LWAR is free software: you can redistribute it and/or modify it under the |
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8 terms of the GNU General Public License as published by the Free Software |
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9 Foundation, either version 3 of the License, or (at your option) any later |
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10 version. |
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11 |
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12 This program is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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15 more details. |
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16 |
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17 You should have received a copy of the GNU General Public License along with |
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18 this program. If not, see <http://www.gnu.org/licenses/>. |
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19 |
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20 |
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21 Implements the program startup code |
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22 |
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23 */ |
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24 |
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25 #include <errno.h> |
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26 #include <stdio.h> |
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27 #include <stdlib.h> |
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28 #include <sys/types.h> |
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29 #include <sys/stat.h> |
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30 #include <unistd.h> |
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31 |
9 | 32 #include <lw_cmdline.h> |
33 | |
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34 #include "lwar.h" |
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35 |
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36 // command line option handling |
9 | 37 #define PROGVER "lwar from " PACKAGE_STRING |
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38 char *program_name; |
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39 |
9 | 40 static int parse_opts(int key, char *arg, void *state) |
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41 { |
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42 switch (key) |
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43 { |
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44 case 'd': |
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45 // debug |
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46 debug_level++; |
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47 break; |
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48 |
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49 case 'a': |
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50 // add members |
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51 operation = LWAR_OP_ADD; |
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52 break; |
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53 |
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54 case 'c': |
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55 // create archive |
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56 operation = LWAR_OP_CREATE; |
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57 break; |
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58 |
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59 case 'm': |
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60 mergeflag = 1; |
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61 break; |
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62 |
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63 case 'r': |
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64 // replace members |
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65 operation = LWAR_OP_REPLACE; |
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66 break; |
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67 |
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68 case 'l': |
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69 // list members |
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70 operation = LWAR_OP_LIST; |
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71 break; |
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72 |
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73 case 'x': |
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74 // extract members |
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75 operation = LWAR_OP_EXTRACT; |
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76 break; |
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77 |
9 | 78 case lw_cmdline_key_arg: |
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79 if (archive_file) |
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80 { |
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81 // add archive member to list |
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82 add_file_name(arg); |
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83 } |
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84 else |
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85 archive_file = arg; |
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86 break; |
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87 |
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88 default: |
9 | 89 return lw_cmdline_err_unknown; |
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90 } |
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91 return 0; |
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92 } |
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93 |
9 | 94 static struct lw_cmdline_options options[] = |
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95 { |
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96 { "replace", 'r', 0, 0, |
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97 "Add or replace archive members" }, |
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98 { "extract", 'x', 0, 0, |
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99 "Extract members from the archive" }, |
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100 { "add", 'a', 0, 0, |
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101 "Add members to the archive" }, |
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102 { "list", 'l', 0, 0, |
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103 "List the contents of the archive" }, |
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104 { "create", 'c', 0, 0, |
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105 "Create new archive (or truncate existing one)" }, |
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106 { "merge", 'm', 0, 0, |
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107 "Add the contents of archive arguments instead of the archives themselves" }, |
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108 { "debug", 'd', 0, 0, |
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109 "Set debug mode"}, |
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110 { 0 } |
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111 }; |
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112 |
9 | 113 static struct lw_cmdline_parser argparser = |
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114 { |
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115 options, |
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116 parse_opts, |
9 | 117 "ARCHIVE [FILE ...]", |
118 "lwar, a library file manager for lwlink", | |
119 PROGVER | |
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120 }; |
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121 |
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122 extern void do_list(void); |
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123 extern void do_add(void); |
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124 extern void do_remove(void); |
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125 extern void do_replace(void); |
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126 extern void do_extract(void); |
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127 |
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128 // main function; parse command line, set up assembler state, and run the |
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129 // assembler on the first file |
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130 int main(int argc, char **argv) |
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131 { |
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132 program_name = argv[0]; |
9 | 133 lw_cmdline_parse(&argparser, argc, argv, 0, 0, NULL); |
0
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134 if (archive_file == NULL) |
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135 { |
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136 fprintf(stderr, "You must specify an archive file.\n"); |
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137 exit(1); |
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138 } |
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139 |
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140 if (operation == 0) |
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141 { |
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142 fprintf(stderr, "You must specify an operation.\n"); |
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143 exit(1); |
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144 } |
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145 |
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146 if (operation == LWAR_OP_LIST || operation == LWAR_OP_REMOVE || operation == LWAR_OP_EXTRACT) |
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147 { |
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148 struct stat stbuf; |
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149 // make sure the archive exists |
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150 if (stat(archive_file, &stbuf) < 0) |
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151 { |
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152 fprintf(stderr, "Cannot open archive file %s:\n", archive_file); |
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153 perror(""); |
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154 exit(2); |
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155 } |
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156 } |
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157 if (operation == LWAR_OP_CREATE) |
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158 { |
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159 struct stat stbuf; |
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160 // check if the archive exists |
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161 if (stat(archive_file, &stbuf) < 0) |
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162 { |
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163 if (errno != ENOENT) |
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164 { |
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165 fprintf(stderr, "Cannot create archive file %s:\n", archive_file); |
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166 perror(""); |
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167 exit(2); |
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168 } |
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169 } |
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170 else |
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171 { |
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172 if (unlink(archive_file) < 0) |
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173 { |
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174 fprintf(stderr, "Cannot create archive file %s:\n", archive_file); |
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175 perror(""); |
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176 exit(2); |
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177 } |
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178 |
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179 } |
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180 } |
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181 |
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182 switch (operation) |
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183 { |
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184 case LWAR_OP_LIST: |
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185 do_list(); |
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186 break; |
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187 |
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188 case LWAR_OP_ADD: |
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189 case LWAR_OP_CREATE: |
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190 do_add(); |
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191 break; |
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192 |
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193 case LWAR_OP_REMOVE: |
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194 do_remove(); |
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195 break; |
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196 |
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197 case LWAR_OP_REPLACE: |
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198 do_replace(); |
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199 break; |
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200 |
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201 case LWAR_OP_EXTRACT: |
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202 do_extract(); |
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203 break; |
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204 } |
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205 |
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206 exit(0); |
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207 } |