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reactos操作系统实现(64)

操作系统实现 64 reactos

2023-09-14 09:10:38 时间

在安装一个操作系统时，绝大多数都是把引导程序安装在硬盘里，下面就来了解安装到硬盘里具体过程，实现代码如下：

#001 static PAGE_NUMBER

#002 BootLoaderHarddiskPage(PINPUT_RECORD Ir)

#003 {

#004 UCHAR PartitionType;

#005 NTSTATUS Status;

#006

获取硬盘分区的类型，然后判断是否可以安装引导程序。

#007 PartitionType = PartitionList->ActiveBootPartition->PartInfo[0].PartitionType;

#008 if ((PartitionType == PARTITION_FAT_12) ||

#009 (PartitionType == PARTITION_FAT_16) ||

#010 (PartitionType == PARTITION_HUGE) ||

#011 (PartitionType == PARTITION_XINT13) ||

#012 (PartitionType == PARTITION_FAT32) ||

#013 (PartitionType == PARTITION_FAT32_XINT13))

#014 {

可以安装引导程序，调用函数InstallFatBootcodeToPartition实现。

#015 Status = InstallFatBootcodeToPartition(&SystemRootPath,

#016 &SourceRootPath,

#017 &DestinationArcPath,

#018 PartitionType);

#019 if (!NT_SUCCESS(Status))

#020 {

#021 MUIDisplayError(ERROR_INSTALL_BOOTCODE, Ir, POPUP_WAIT_ENTER);

#022 return QUIT_PAGE;

#023 }

#024

#025 return SUCCESS_PAGE;

#026 }

#027 else

#028 {

如果不能安装，就提示出错。

#029 MUIDisplayError(ERROR_WRITE_BOOT, Ir, POPUP_WAIT_ENTER);

#030 return QUIT_PAGE;

#031 }

#032

#033 return BOOT_LOADER_HARDDISK_PAGE;

#034 }

下面继续分析函数InstallFatBootcodeToPartition的实现，如下：

#001 NTSTATUS

#002 InstallFatBootcodeToPartition(PUNICODE_STRING SystemRootPath,

#003 PUNICODE_STRING SourceRootPath,

#004 PUNICODE_STRING DestinationArcPath,

#005 UCHAR PartitionType)

#006 {

#007 #ifdef __REACTOS__

#008 WCHAR SrcPath[MAX_PATH];

#009 WCHAR DstPath[MAX_PATH];

#010 NTSTATUS Status;

#011

#012 /* FAT or FAT32 partition */

#013 DPRINT("System path: '%wZ'/n", SystemRootPath);

#014

判断分区路径里是否存在ntldr和boot.ini文件。

#015 if (DoesFileExist(SystemRootPath->Buffer, L"ntldr") == TRUE ||

#016 DoesFileExist(SystemRootPath->Buffer, L"boot.ini") == TRUE)

#017 {

如果发现NT、2000、XP的引导程序，就只需要设置选项，让ntldr来加freeldr.sys程序就行了。

#018 /* Search root directory for 'ntldr' and 'boot.ini'. */

#019 DPRINT("Found Microsoft Windows NT/2000/XP boot loader/n");

#020

#021 /* Copy FreeLoader to the boot partition */

#022 wcscpy(SrcPath, SourceRootPath->Buffer);

#023 wcscat(SrcPath, L"//loader//freeldr.sys");

#024 wcscpy(DstPath, SystemRootPath->Buffer);

#025 wcscat(DstPath, L"//freeldr.sys");

#026

这里开始拷贝文件。

#027 DPRINT("Copy: %S ==> %S/n", SrcPath, DstPath);

#028 Status = SetupCopyFile(SrcPath, DstPath);

#029 if (!NT_SUCCESS(Status))

#030 {

#031 DPRINT1("SetupCopyFile() failed (Status %lx)/n", Status);

#032 return Status;

#033 }

#034

更新freeldr.ini文件。

#035 /* Create or update freeldr.ini */

#036 if (DoesFileExist(SystemRootPath->Buffer, L"freeldr.ini") == FALSE)

#037 {

#038 /* Create new 'freeldr.ini' */

#039 DPRINT1("Create new 'freeldr.ini'/n");

#040 wcscpy(DstPath, SystemRootPath->Buffer);

#041 wcscat(DstPath, L"//freeldr.ini");

#042

#043 Status = CreateFreeLoaderIniForReactos(DstPath,

#044 DestinationArcPath->Buffer);

#045 if (!NT_SUCCESS(Status))

#046 {

#047 DPRINT1("CreateFreeLoaderIniForReactos() failed (Status %lx)/n", Status);

#048 return Status;

#049 }

#050

安装新的引导代码到引导扇区。

#051 /* Install new bootcode */

#052 if (PartitionType == PARTITION_FAT32 ||

#053 PartitionType == PARTITION_FAT32_XINT13)

#054 {

#055 /* Install FAT32 bootcode */

#056 wcscpy(SrcPath, SourceRootPath->Buffer);

#057 wcscat(SrcPath, L"//loader//fat32.bin");

#058 wcscpy(DstPath, SystemRootPath->Buffer);

#059 wcscat(DstPath, L"//bootsect.ros");

#060

#061 DPRINT1("Install FAT32 bootcode: %S ==> %S/n", SrcPath, DstPath);

#062 Status = InstallFat32BootCodeToFile(SrcPath,

#063 DstPath,

#064 SystemRootPath->Buffer);

#065 if (!NT_SUCCESS(Status))

#066 {

#067 DPRINT1("InstallFat32BootCodeToFile() failed (Status %lx)/n", Status);

#068 return Status;

#069 }

#070 }

#071 else

#072 {

#073 /* Install FAT16 bootcode */

#074 wcscpy(SrcPath, SourceRootPath->Buffer);

#075 wcscat(SrcPath, L"//loader//fat.bin");

#076 wcscpy(DstPath, SystemRootPath->Buffer);

#077 wcscat(DstPath, L"//bootsect.ros");

#078

#079 DPRINT1("Install FAT bootcode: %S ==> %S/n", SrcPath, DstPath);

#080 Status = InstallFat16BootCodeToFile(SrcPath,

#081 DstPath,

#082 SystemRootPath->Buffer);

#083 if (!NT_SUCCESS(Status))

#084 {

#085 DPRINT1("InstallFat16BootCodeToFile() failed (Status %lx)/n", Status);

#086 return Status;

#087 }

#088 }

#089 }

#090 else

#091 {

#092 /* Update existing 'freeldr.ini' */

#093 DPRINT1("Update existing 'freeldr.ini'/n");

#094 wcscpy(DstPath, SystemRootPath->Buffer);

#095 wcscat(DstPath, L"//freeldr.ini");

#096

#097 Status = UpdateFreeLoaderIni(DstPath,

#098 DestinationArcPath->Buffer);

#099 if (!NT_SUCCESS(Status))

#100 {

#101 DPRINT1("UpdateFreeLoaderIni() failed (Status %lx)/n", Status);

#102 return Status;

#103 }

#104 }

#105

#106 /* Update 'boot.ini' */

#107 wcscpy(DstPath, SystemRootPath->Buffer);

#108 wcscat(DstPath, L"//boot.ini");

#109

#110 DPRINT1("Update 'boot.ini': %S/n", DstPath);

#111 Status = UpdateBootIni(DstPath,

#112 L"C://bootsect.ros",

#113 L"/"ReactOS/"");

#114 if (!NT_SUCCESS(Status))

#115 {

#116 DPRINT1("UpdateBootIni() failed (Status %lx)/n", Status);

#117 return Status;

#118 }

#119 }

#120 else if (DoesFileExist(SystemRootPath->Buffer, L"io.sys") == TRUE ||

#121 DoesFileExist(SystemRootPath->Buffer, L"msdos.sys") == TRUE)

#122 {

查找分区里是否有DOS操作系统。

#123 /* Search for root directory for 'io.sys' and 'msdos.sys'. */

#124 DPRINT1("Found Microsoft DOS or Windows 9x boot loader/n");

#125

#126 /* Copy FreeLoader to the boot partition */

#127 wcscpy(SrcPath, SourceRootPath->Buffer);

#128 wcscat(SrcPath, L"//loader//freeldr.sys");

#129 wcscpy(DstPath, SystemRootPath->Buffer);

#130 wcscat(DstPath, L"//freeldr.sys");

#131

拷贝文件。

#132 DPRINT("Copy: %S ==> %S/n", SrcPath, DstPath);

#133 Status = SetupCopyFile(SrcPath, DstPath);

#134 if (!NT_SUCCESS(Status))

#135 {

#136 DPRINT1("SetupCopyFile() failed (Status %lx)/n", Status);

#137 return Status;

#138 }

#139

创建并更新freeldr.ini文件。

#140 /* Create or update 'freeldr.ini' */

#141 if (DoesFileExist(SystemRootPath->Buffer, L"freeldr.ini") == FALSE)

#142 {

#143 /* Create new 'freeldr.ini' */

#144 DPRINT1("Create new 'freeldr.ini'/n");

#145 wcscpy(DstPath, SystemRootPath->Buffer);

#146 wcscat(DstPath, L"//freeldr.ini");

#147

#148 Status = CreateFreeLoaderIniForDos(DstPath,

#149 DestinationArcPath->Buffer);

#150 if (!NT_SUCCESS(Status))

#151 {

#152 DPRINT1("CreateFreeLoaderIniForDos() failed (Status %lx)/n", Status);

#153 return Status;

#154 }

#155

#156 /* Save current bootsector as 'BOOTSECT.DOS' */

#157 wcscpy(SrcPath, SystemRootPath->Buffer);

#158 wcscpy(DstPath, SystemRootPath->Buffer);

#159 wcscat(DstPath, L"//bootsect.dos");

#160

#161 DPRINT1("Save bootsector: %S ==> %S/n", SrcPath, DstPath);

#162 Status = SaveCurrentBootSector(SrcPath,

#163 DstPath);

#164 if (!NT_SUCCESS(Status))

#165 {

#166 DPRINT1("SaveCurrentBootSector() failed (Status %lx)/n", Status);

#167 return Status;

#168 }

#169

#170 /* Install new bootsector */

#171 if (PartitionType == PARTITION_FAT32 ||

#172 PartitionType == PARTITION_FAT32_XINT13)

#173 {

#174 wcscpy(SrcPath, SourceRootPath->Buffer);

#175 wcscat(SrcPath, L"//loader//fat32.bin");

#176

#177 DPRINT1("Install FAT32 bootcode: %S ==> %S/n", SrcPath, SystemRootPath->Buffer);

#178 Status = InstallFat32BootCodeToDisk(SrcPath,

#179 SystemRootPath->Buffer);

#180 if (!NT_SUCCESS(Status))

#181 {

#182 DPRINT1("InstallFat32BootCodeToDisk() failed (Status %lx)/n", Status);

#183 return Status;

#184 }

#185 }

#186 else

#187 {

#188 wcscpy(SrcPath, SourceRootPath->Buffer);

#189 wcscat(SrcPath, L"//loader//fat.bin");

#190

#191 DPRINT1("Install FAT bootcode: %S ==> %S/n", SrcPath, SystemRootPath->Buffer);

#192 Status = InstallFat16BootCodeToDisk(SrcPath,

#193 SystemRootPath->Buffer);

#194 if (!NT_SUCCESS(Status))

#195 {

#196 DPRINT1("InstallFat16BootCodeToDisk() failed (Status %lx)/n", Status);

#197 return Status;

#198 }

#199 }

#200 }

#201 else

#202 {

#203 /* Update existing 'freeldr.ini' */

#204 wcscpy(DstPath, SystemRootPath->Buffer);

#205 wcscat(DstPath, L"//freeldr.ini");

#206

#207 Status = UpdateFreeLoaderIni(DstPath,

#208 DestinationArcPath->Buffer);

#209 if (!NT_SUCCESS(Status))

#210 {

#211 DPRINT1("UpdateFreeLoaderIni() failed (Status %lx)/n", Status);

#212 return Status;

#213 }

#214 }

#215 }

#216 else

#217 {

这个硬盘分区没有任何已经安装的系统。

#218 /* No or unknown boot loader */

#219 DPRINT1("No or unknown boot loader found/n");

#220

拷贝Reactos的引导程序和配置文件。

#221 /* Copy FreeLoader to the boot partition */

#222 wcscpy(SrcPath, SourceRootPath->Buffer);

#223 wcscat(SrcPath, L"//loader//freeldr.sys");

#224 wcscpy(DstPath, SystemRootPath->Buffer);

#225 wcscat(DstPath, L"//freeldr.sys");

#226

#227 DPRINT("Copy: %S ==> %S/n", SrcPath, DstPath);

#228 Status = SetupCopyFile(SrcPath, DstPath);

#229 if (!NT_SUCCESS(Status))

#230 {

#231 DPRINT1("SetupCopyFile() failed (Status %lx)/n", Status);

#232 return Status;

#233 }

#234

创建和更新引导配置freeldr.ini文件。

#235 /* Create or update 'freeldr.ini' */

#236 if (DoesFileExist(SystemRootPath->Buffer, L"freeldr.ini") == FALSE)

#237 {

#238 /* Create new freeldr.ini */

#239 wcscpy(DstPath, SystemRootPath->Buffer);

#240 wcscat(DstPath, L"//freeldr.ini");

#241

#242 DPRINT("Copy: %S ==> %S/n", SrcPath, DstPath);

#243 Status = CreateFreeLoaderIniForReactos(DstPath,

#244 DestinationArcPath->Buffer);

#245 if (!NT_SUCCESS(Status))

#246 {

#247 DPRINT1("CreateFreeLoaderIniForReactos() failed (Status %lx)/n", Status);

#248 return Status;

#249 }

#250

保存当前引导扇区代码为BOOTSECT.OLD。

#251 /* Save current bootsector as 'BOOTSECT.OLD' */

#252 wcscpy(SrcPath, SystemRootPath->Buffer);

#253 wcscpy(DstPath, SystemRootPath->Buffer);

#254 wcscat(DstPath, L"//bootsect.old");

#255

#256 DPRINT("Save bootsector: %S ==> %S/n", SrcPath, DstPath);

#257 Status = SaveCurrentBootSector(SrcPath,

#258 DstPath);

#259 if (!NT_SUCCESS(Status))

#260 {

#261 DPRINT1("SaveCurrentBootSector() failed (Status %lx)/n", Status);

#262 return Status;

#263 }

#264

安装新的引导扇区代码硬盘分区。

#265 /* Install new bootsector */

#266 if (PartitionType == PARTITION_FAT32 ||

#267 PartitionType == PARTITION_FAT32_XINT13)

#268 {

#269 wcscpy(SrcPath, SourceRootPath->Buffer);

#270 wcscat(SrcPath, L"//loader//fat32.bin");

#271

#272 DPRINT("Install FAT32 bootcode: %S ==> %S/n", SrcPath, SystemRootPath->Buffer);

#273 Status = InstallFat32BootCodeToDisk(SrcPath,

#274 SystemRootPath->Buffer);

#275 if (!NT_SUCCESS(Status))

#276 {

#277 DPRINT1("InstallFat32BootCodeToDisk() failed (Status %lx)/n", Status);

#278 return Status;

#279 }

#280 }

#281 else

#282 {

#283 wcscpy(SrcPath, SourceRootPath->Buffer);

#284 wcscat(SrcPath, L"//loader//fat.bin");

#285

#286 DPRINT("Install FAT bootcode: %S ==> %S/n", SrcPath, SystemRootPath->Buffer);

#287 Status = InstallFat16BootCodeToDisk(SrcPath,

#288 SystemRootPath->Buffer);

#289 if (!NT_SUCCESS(Status))

#290 {

#291 DPRINT1("InstallFat16BootCodeToDisk() failed (Status %lx)/n", Status);

#292 return Status;

#293 }

#294 }

#295 }

#296 else

#297 {

#298 /* Update existing 'freeldr.ini' */

#299 wcscpy(DstPath, SystemRootPath->Buffer);

#300 wcscat(DstPath, L"//freeldr.ini");

#301

#302 Status = UpdateFreeLoaderIni(DstPath,

#303 DestinationArcPath->Buffer);

#304 if (!NT_SUCCESS(Status))

#305 {

#306 DPRINT1("UpdateFreeLoaderIni() failed (Status %lx)/n", Status);

#307 return Status;

#308 }

#309 }

#310 }

#311

#312 return STATUS_SUCCESS;

#313 #else

#314 return STATUS_NOT_IMPLEMENTED;

#315 #endif

#316 }

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