| 1 | /* $Id: VBoxBs2Linker.cpp 106061 2024-09-16 14:03:52Z 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) 2006-2024 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include <stdio.h>
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| 42 | #include <string.h>
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| 43 | #include <stdlib.h>
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| 44 | #include <iprt/types.h>
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| 45 |
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| 46 |
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| 47 | int main(int argc, char **argv)
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| 48 | {
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| 49 | const char *pszOutput = NULL;
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| 50 | const char **papszInputs = (const char **)calloc(argc, sizeof(const char *));
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| 51 | unsigned cInputs = 0;
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| 52 |
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| 53 | /*
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| 54 | * Scan the arguments.
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| 55 | */
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| 56 | for (int i = 1; i < argc; i++)
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| 57 | {
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| 58 | if (argv[i][0] == '-')
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| 59 | {
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| 60 | const char *pszOpt = &argv[i][1];
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| 61 | if (*pszOpt == '-')
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| 62 | {
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| 63 | /* Convert long options to short ones. */
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| 64 | pszOpt--;
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| 65 | if (!strcmp(pszOpt, "--output"))
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| 66 | pszOpt = "o";
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| 67 | else if (!strcmp(pszOpt, "--version"))
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| 68 | pszOpt = "V";
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| 69 | else if (!strcmp(pszOpt, "--help"))
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| 70 | pszOpt = "h";
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| 71 | else
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| 72 | {
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| 73 | fprintf(stderr, "syntax errro: Unknown options '%s'\n", pszOpt);
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| 74 | free(papszInputs);
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| 75 | return 2;
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| 76 | }
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| 77 | }
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| 78 |
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| 79 | /* Process the list of short options. */
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| 80 | while (*pszOpt)
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| 81 | {
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| 82 | switch (*pszOpt++)
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| 83 | {
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| 84 | case 'o':
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| 85 | {
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| 86 | const char *pszValue = pszOpt;
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| 87 | pszOpt = strchr(pszOpt, '\0');
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| 88 | if (*pszValue == '=')
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| 89 | pszValue++;
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| 90 | else if (!*pszValue)
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| 91 | {
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| 92 | if (i + 1 >= argc)
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| 93 | {
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| 94 | fprintf(stderr, "syntax error: The --output option expects a filename.\n");
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| 95 | free(papszInputs);
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| 96 | return 12;
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| 97 | }
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| 98 | pszValue = argv[++i];
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| 99 | }
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| 100 | if (pszOutput)
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| 101 | {
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| 102 | fprintf(stderr, "Only one output file is allowed. You've specified '%s' and '%s'\n",
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| 103 | pszOutput, pszValue);
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| 104 | free(papszInputs);
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| 105 | return 2;
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| 106 | }
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| 107 | pszOutput = pszValue;
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| 108 | pszOpt = "";
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| 109 | break;
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| 110 | }
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| 111 |
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| 112 | case 'V':
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| 113 | printf("%s\n", "$Revision: 106061 $");
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| 114 | free(papszInputs);
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| 115 | return 0;
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| 116 |
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| 117 | case '?':
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| 118 | case 'h':
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| 119 | printf("usage: %s [options] -o <output> <input1> [input2 ... [inputN]]\n", argv[0]);
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| 120 | free(papszInputs);
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| 121 | return 0;
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| 122 | }
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| 123 | }
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| 124 | }
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| 125 | else
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| 126 | papszInputs[cInputs++] = argv[i];
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| 127 | }
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| 128 |
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| 129 | if (!pszOutput)
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| 130 | {
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| 131 | fprintf(stderr, "syntax error: No output file was specified (-o or --output).\n");
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| 132 | free(papszInputs);
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| 133 | return 2;
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| 134 | }
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| 135 | if (cInputs == 0)
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| 136 | {
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| 137 | fprintf(stderr, "syntax error: No input files was specified.\n");
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| 138 | free(papszInputs);
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| 139 | return 2;
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| 140 | }
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| 141 |
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| 142 |
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| 143 | /*
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| 144 | * Do the job.
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| 145 | */
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| 146 | /* Open the output file. */
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| 147 | #if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS)
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| 148 | FILE *pOutput = fopen(pszOutput, "wb");
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| 149 | #else
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| 150 | FILE *pOutput = fopen(pszOutput, "w");
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| 151 | #endif
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| 152 | if (!pOutput)
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| 153 | {
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| 154 | fprintf(stderr, "error: Failed to open output file '%s' for writing\n", pszOutput);
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| 155 | free(papszInputs);
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| 156 | return 1;
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| 157 | }
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| 158 |
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| 159 | /* Copy the input files to the output file, with sector padding applied. */
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| 160 | int rcExit = 0;
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| 161 | for (unsigned i = 0; i < cInputs && rcExit == 0; i++)
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| 162 | {
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| 163 | #if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS)
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| 164 | FILE *pInput = fopen(papszInputs[i], "rb");
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| 165 | #else
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| 166 | FILE *pInput = fopen(papszInputs[i], "r");
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| 167 | #endif
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| 168 | if (pInput)
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| 169 | {
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| 170 | for (;;)
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| 171 | {
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| 172 | /* Read a block from the input file. */
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| 173 | uint8_t abBuf[4096];
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| 174 | size_t cbRead = fread(abBuf, sizeof(uint8_t), 4096, pInput);
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| 175 | if (!cbRead || ferror(pInput))
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| 176 | break;
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| 177 |
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| 178 | /* Padd the end of the file if necessary. */
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| 179 | if (cbRead != 4096 && !feof(pInput))
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| 180 | {
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| 181 | fprintf(stderr, "error: fread returned %u bytes, but we're not at the end of the file yet...\n",
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| 182 | (unsigned)cbRead);
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| 183 | rcExit = 1;
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| 184 | break;
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| 185 | }
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| 186 | if ((cbRead & 0x1ff) != 0)
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| 187 | {
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| 188 | memset(&abBuf[cbRead], 0, 4096 - cbRead);
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| 189 | cbRead = (cbRead + 0x1ff) & ~0x1ffU;
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| 190 | }
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| 191 |
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| 192 | /* Write the block to the output file. */
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| 193 | if (fwrite(abBuf, sizeof(uint8_t), cbRead, pOutput) != cbRead)
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| 194 | {
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| 195 | fprintf(stderr, "error: fwrite failed\n");
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| 196 | rcExit = 1;
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| 197 | break;
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| 198 | }
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| 199 | }
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| 200 |
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| 201 | if (ferror(pInput))
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| 202 | {
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| 203 | fprintf(stderr, "error: Error reading '%s'.\n", papszInputs[i]);
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| 204 | rcExit = 1;
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| 205 | }
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| 206 | fclose(pInput);
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| 207 | }
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| 208 | else
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| 209 | {
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| 210 | fprintf(stderr, "error: Failed to open '%s' for reading.\n", papszInputs[i]);
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| 211 | rcExit = 1;
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| 212 | }
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| 213 | }
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| 214 |
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| 215 | /* Finally, close the output file (can fail because of buffered data). */
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| 216 | if (fclose(stderr) != 0)
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| 217 | {
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| 218 | fprintf(stderr, "error: Error closing '%s'.\n", pszOutput);
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| 219 | rcExit = 1;
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| 220 | }
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| 221 |
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| 222 | fclose(pOutput);
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| 223 | free(papszInputs);
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| 224 | return rcExit;
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| 225 | }
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| 226 |
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