91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
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//
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// REGFKEY.C
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//
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// Copyright (C) Microsoft Corporation, 1995
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//
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// Implementation of RegFlushKey and supporting functions.
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//
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#include "pch.h"
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// Magic HKEY used by Setup to disable disk I/O for the duration of this
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// Windows session (you must restart to re-enable disk I/O). This is done
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// just before the new SYSTEM.DAT and USER.DAT are copied to their final
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// destination.
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#define HKEY_DISABLE_REG (HKEY) 0x484A574D
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// Magic HKEY used by CONFIGMG to force a flush of the registry before we've
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// received our normal post-critical init call.
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#define HKEY_CRITICAL_FLUSH (HKEY) 0x5350574D
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// Magic HKEY used by ScanregW to clear the failed boot bit FHF_BOOTFAILED in the file header
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// of HKEY_LOCAL_MACHINE. Indicating that we successfully booted and verified the integrity
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// of the registry files, and that scanreg.exe does not need to be ran by win.com on next boot.
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#define HKEY_BOOT_SUCCESS (HKEY) 0x5342574D
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//
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// VMMRegFlushKey
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//
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LONG
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REGAPI
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VMMRegFlushKey(
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HKEY hKey
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)
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{
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int ErrorCode;
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BOOL fBootSuccess = FALSE;
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if (!RgLockRegistry())
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return ERROR_LOCK_FAILED;
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#ifdef VXD
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// Set the g_RgFileAccessDisabled flag so that all create or open file
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// calls will be failed. The backing stores for our files are about to
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// be changed, so there's no file for us to go to.
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if (hKey == HKEY_DISABLE_REG) {
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g_RgFileAccessDisabled = TRUE;
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ErrorCode = ERROR_SUCCESS;
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goto ReturnErrorCode;
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}
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// Set the g_RgPostCriticalInit flag so that all I/O calls will go to disk
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// instead of the XMS cache. The XMS cache will be freed when/if the
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// normal post critical init routine is called, but we should only be
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// getting this call when we're about to die, so it doesn't really matter.
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if (hKey == HKEY_CRITICAL_FLUSH) {
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g_RgPostCriticalInit = TRUE;
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hKey = HKEY_LOCAL_MACHINE;
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}
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// Clears the failed boot bit FHF_BOOTFAILED in the file header of HKEY_LOCAL_MACHINE.
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// Indicating that we successfully booted and verified the integrity of the registry files.
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if (hKey == HKEY_BOOT_SUCCESS)
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{
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fBootSuccess = TRUE;
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hKey = HKEY_LOCAL_MACHINE;
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}
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#endif
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if ((ErrorCode = RgValidateAndConvertKeyHandle(&hKey)) == ERROR_SUCCESS)
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{
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#ifdef VXD
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if (fBootSuccess)
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{
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hKey-> lpFileInfo-> FileHeader.Flags |= FHF_DIRTY;
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hKey-> lpFileInfo-> FileHeader.Flags &= ~FHF_BOOTFAILED;
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}
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#endif
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ErrorCode = RgFlushFileInfo(hKey-> lpFileInfo);
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}
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#ifdef VXD
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ReturnErrorCode:
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#endif
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RgUnlockRegistry();
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return ErrorCode;
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}
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