1 | /* $Id: VBoxBs2Linker.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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2 | /** @file
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3 | * VirtualBox Validation Kit - Boot Sector 2 "linker".
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2020 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * The contents of this file may alternatively be used under the terms
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18 | * of the Common Development and Distribution License Version 1.0
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19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | * VirtualBox OSE distribution, in which case the provisions of the
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21 | * CDDL are applicable instead of those of the GPL.
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22 | *
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23 | * You may elect to license modified versions of this file under the
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24 | * terms and conditions of either the GPL or the CDDL or both.
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25 | */
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26 |
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27 |
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28 | /*********************************************************************************************************************************
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29 | * Header Files *
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30 | *********************************************************************************************************************************/
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31 | #include <stdio.h>
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32 | #include <string.h>
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33 | #include <stdlib.h>
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34 | #include <iprt/types.h>
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35 |
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36 |
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37 | int main(int argc, char **argv)
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38 | {
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39 | const char *pszOutput = NULL;
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40 | const char **papszInputs = (const char **)calloc(argc, sizeof(const char *));
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41 | unsigned cInputs = 0;
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42 |
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43 | /*
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44 | * Scan the arguments.
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45 | */
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46 | for (int i = 1; i < argc; i++)
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47 | {
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48 | if (argv[i][0] == '-')
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49 | {
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50 | const char *pszOpt = &argv[i][1];
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51 | if (*pszOpt == '-')
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52 | {
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53 | /* Convert long options to short ones. */
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54 | pszOpt--;
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55 | if (!strcmp(pszOpt, "--output"))
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56 | pszOpt = "o";
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57 | else if (!strcmp(pszOpt, "--version"))
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58 | pszOpt = "V";
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59 | else if (!strcmp(pszOpt, "--help"))
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60 | pszOpt = "h";
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61 | else
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62 | {
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63 | fprintf(stderr, "syntax errro: Unknown options '%s'\n", pszOpt);
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64 | free(papszInputs);
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65 | return 2;
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66 | }
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67 | }
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68 |
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69 | /* Process the list of short options. */
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70 | while (*pszOpt)
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71 | {
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72 | switch (*pszOpt++)
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73 | {
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74 | case 'o':
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75 | {
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76 | const char *pszValue = pszOpt;
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77 | pszOpt = strchr(pszOpt, '\0');
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78 | if (*pszValue == '=')
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79 | pszValue++;
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80 | else if (!*pszValue)
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81 | {
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82 | if (i + 1 >= argc)
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83 | {
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84 | fprintf(stderr, "syntax error: The --output option expects a filename.\n");
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85 | free(papszInputs);
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86 | return 12;
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87 | }
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88 | pszValue = argv[++i];
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89 | }
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90 | if (pszOutput)
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91 | {
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92 | fprintf(stderr, "Only one output file is allowed. You've specified '%s' and '%s'\n",
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93 | pszOutput, pszValue);
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94 | free(papszInputs);
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95 | return 2;
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96 | }
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97 | pszOutput = pszValue;
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98 | pszOpt = "";
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99 | break;
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100 | }
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101 |
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102 | case 'V':
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103 | printf("%s\n", "$Revision: 82968 $");
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104 | free(papszInputs);
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105 | return 0;
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106 |
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107 | case '?':
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108 | case 'h':
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109 | printf("usage: %s [options] -o <output> <input1> [input2 ... [inputN]]\n", argv[0]);
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110 | free(papszInputs);
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111 | return 0;
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112 | }
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113 | }
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114 | }
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115 | else
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116 | papszInputs[cInputs++] = argv[i];
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117 | }
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118 |
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119 | if (!pszOutput)
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120 | {
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121 | fprintf(stderr, "syntax error: No output file was specified (-o or --output).\n");
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122 | free(papszInputs);
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123 | return 2;
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124 | }
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125 | if (cInputs == 0)
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126 | {
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127 | fprintf(stderr, "syntax error: No input files was specified.\n");
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128 | free(papszInputs);
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129 | return 2;
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130 | }
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131 |
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132 |
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133 | /*
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134 | * Do the job.
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135 | */
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136 | /* Open the output file. */
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137 | #if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS)
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138 | FILE *pOutput = fopen(pszOutput, "wb");
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139 | #else
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140 | FILE *pOutput = fopen(pszOutput, "w");
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141 | #endif
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142 | if (!pOutput)
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143 | {
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144 | fprintf(stderr, "error: Failed to open output file '%s' for writing\n", pszOutput);
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145 | free(papszInputs);
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146 | return 1;
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147 | }
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148 |
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149 | /* Copy the input files to the output file, with sector padding applied. */
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150 | int rcExit = 0;
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151 | size_t off = 0;
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152 | for (unsigned i = 0; i < cInputs && rcExit == 0; i++)
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153 | {
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154 | #if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS)
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155 | FILE *pInput = fopen(papszInputs[i], "rb");
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156 | #else
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157 | FILE *pInput = fopen(papszInputs[i], "r");
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158 | #endif
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159 | if (pInput)
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160 | {
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161 | for (;;)
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162 | {
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163 | /* Read a block from the input file. */
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164 | uint8_t abBuf[4096];
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165 | size_t cbRead = fread(abBuf, sizeof(uint8_t), 4096, pInput);
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166 | if (!cbRead || ferror(pInput))
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167 | break;
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168 |
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169 | /* Padd the end of the file if necessary. */
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170 | if (cbRead != 4096 && !feof(pInput))
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171 | {
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172 | fprintf(stderr, "error: fread returned %u bytes, but we're not at the end of the file yet...\n",
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173 | (unsigned)cbRead);
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174 | rcExit = 1;
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175 | break;
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176 | }
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177 | if ((cbRead & 0x1ff) != 0)
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178 | {
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179 | memset(&abBuf[cbRead], 0, 4096 - cbRead);
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180 | cbRead = (cbRead + 0x1ff) & ~0x1ffU;
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181 | }
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182 |
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183 | /* Write the block to the output file. */
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184 | if (fwrite(abBuf, sizeof(uint8_t), cbRead, pOutput) == cbRead)
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185 | off += cbRead;
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186 | else
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187 | {
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188 | fprintf(stderr, "error: fwrite failed\n");
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189 | rcExit = 1;
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190 | break;
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191 | }
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192 | }
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193 |
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194 | if (ferror(pInput))
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195 | {
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196 | fprintf(stderr, "error: Error reading '%s'.\n", papszInputs[i]);
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197 | rcExit = 1;
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198 | }
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199 | fclose(pInput);
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200 | }
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201 | else
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202 | {
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203 | fprintf(stderr, "error: Failed to open '%s' for reading.\n", papszInputs[i]);
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204 | rcExit = 1;
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205 | }
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206 | }
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207 |
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208 | /* Finally, close the output file (can fail because of buffered data). */
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209 | if (fclose(stderr) != 0)
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210 | {
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211 | fprintf(stderr, "error: Error closing '%s'.\n", pszOutput);
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212 | rcExit = 1;
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213 | }
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214 |
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215 | fclose(pOutput);
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216 | free(papszInputs);
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217 | return rcExit;
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218 | }
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219 |
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