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annotate lwar/main.c @ 577:e49d24f4a9a5

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Correct bug in the object file output code leading to stack corruption It turns out leaving a pointer to a stack allocated temporary in a persistent data structure is not conducive to correct program operation. Undo the export check setup in the object file output sequence so a pointer to stack allocated memory is not left hanging when the function returns. This seems to correct at least one mysterious crash bug, and possibly others. Thanks to Boisy Pitre for reporting the crash bug that led to this discovery, as well as a previous crash bug that likely has the same root cause. Additional thanks to Ciaran Anscomb whose debugger wielding wizardry revealed the exact location of this particular bit of unbrilliance.
author William Astle <lost@l-w.ca>
date Sat, 03 Aug 2024 14:30:06 -0600
parents a6c9129e5948
children
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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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21 Implements the program startup code
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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
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31 #include <lw_cmdline.h>
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32 #include <version.h>
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33
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34 #include "lwar.h"
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35
386
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36 #ifdef _MSC_VER
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37 #include <lw_win.h> // windows build
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38 #else
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39 #include <unistd.h>
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40 #endif
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41
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42 // command line option handling
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43 #define PROGVER "lwar from " PACKAGE_STRING
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44 char *program_name;
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45
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46 static int parse_opts(int key, char *arg, void *state)
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47 {
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48 switch (key)
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49 {
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50 case 'd':
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51 // debug
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52 debug_level++;
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53 break;
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54
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55 case 'n':
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56 // filename only, no path
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57 filename_flag++;
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58 break;
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59
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60 case 'a':
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61 // add members
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62 operation = LWAR_OP_ADD;
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63 break;
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64
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65 case 'c':
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66 // create archive
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67 operation = LWAR_OP_CREATE;
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68 break;
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69
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70 case 'm':
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71 mergeflag = 1;
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72 break;
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73
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74 case 'r':
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75 // replace members
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76 operation = LWAR_OP_REPLACE;
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77 break;
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78
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79 case 'l':
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80 // list members
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81 operation = LWAR_OP_LIST;
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82 break;
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83
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84 case 'x':
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85 // extract members
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86 operation = LWAR_OP_EXTRACT;
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87 break;
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88
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89 case lw_cmdline_key_arg:
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90 if (archive_file)
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91 {
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92 // add archive member to list
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93 add_file_name(arg);
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94 }
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95 else
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96 archive_file = arg;
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97 break;
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98
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99 case lw_cmdline_key_end:
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100 break;
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101
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102 default:
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103 return lw_cmdline_err_unknown;
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104 }
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105 return 0;
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106 }
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107
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108 static struct lw_cmdline_options options[] =
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109 {
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110 { "replace", 'r', 0, 0,
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111 "Add or replace archive members" },
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112 { "extract", 'x', 0, 0,
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113 "Extract members from the archive" },
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114 { "add", 'a', 0, 0,
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115 "Add members to the archive" },
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116 { "list", 'l', 0, 0,
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117 "List the contents of the archive" },
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118 { "create", 'c', 0, 0,
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119 "Create new archive (or truncate existing one)" },
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120 { "merge", 'm', 0, 0,
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121 "Add the contents of archive arguments instead of the archives themselves" },
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122 { "nopaths", 'n', 0, 0,
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123 "Store only the filename when adding members and ignore the path, if any, when extracting members" },
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124 { "debug", 'd', 0, 0,
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125 "Set debug mode"},
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126 { 0 }
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127 };
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128
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129 static struct lw_cmdline_parser argparser =
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130 {
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131 options,
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132 parse_opts,
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133 "ARCHIVE [FILE ...]",
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134 "lwar, a library file manager for lwlink",
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135 PROGVER
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136 };
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137
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138 extern void do_list(void);
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139 extern void do_add(void);
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140 extern void do_remove(void);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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141 extern void do_replace(void);
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142 extern void do_extract(void);
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143
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144 // main function; parse command line, set up assembler state, and run the
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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145 // assembler on the first file
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146 int main(int argc, char **argv)
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147 {
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148 program_name = argv[0];
449
96a05e89ab03 Fix command line bug in lwar
William Astle <lost@l-w.ca>
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149
441
b138b4005125 Make missing command line arguments fail properly
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150 if (lw_cmdline_parse(&argparser, argc, argv, 0, 0, NULL) != 0)
b138b4005125 Make missing command line arguments fail properly
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151 {
b138b4005125 Make missing command line arguments fail properly
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152 exit(1);
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parents: 430
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153 }
0
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154 if (archive_file == NULL)
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155 {
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156 fprintf(stderr, "You must specify an archive file.\n");
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157 exit(1);
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158 }
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159
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160 if (operation == 0)
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161 {
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162 fprintf(stderr, "You must specify an operation.\n");
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163 exit(1);
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164 }
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165
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166 if (operation == LWAR_OP_LIST || operation == LWAR_OP_REMOVE || operation == LWAR_OP_EXTRACT)
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167 {
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168 struct stat stbuf;
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169 // make sure the archive exists
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170 if (stat(archive_file, &stbuf) < 0)
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171 {
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172 fprintf(stderr, "Cannot open archive file %s:\n", archive_file);
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173 perror("");
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174 exit(2);
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175 }
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176 }
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177 if (operation == LWAR_OP_CREATE)
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178 {
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179 struct stat stbuf;
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180 // check if the archive exists
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181 if (stat(archive_file, &stbuf) < 0)
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182 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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183 if (errno != ENOENT)
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184 {
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185 fprintf(stderr, "Cannot create archive file %s:\n", archive_file);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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186 perror("");
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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187 exit(2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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188 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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189 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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190 else
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191 {
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192 if (unlink(archive_file) < 0)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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193 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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194 fprintf(stderr, "Cannot create archive file %s:\n", archive_file);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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195 perror("");
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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196 exit(2);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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197 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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198
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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199 }
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200 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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201
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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202 switch (operation)
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203 {
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204 case LWAR_OP_LIST:
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205 do_list();
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206 break;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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207
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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208 case LWAR_OP_ADD:
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209 case LWAR_OP_CREATE:
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210 do_add();
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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211 break;
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212
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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213 case LWAR_OP_REMOVE:
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214 do_remove();
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215 break;
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216
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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217 case LWAR_OP_REPLACE:
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218 do_replace();
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219 break;
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220
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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221 case LWAR_OP_EXTRACT:
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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222 do_extract();
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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223 break;
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224 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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225
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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226 exit(0);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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227 }