512 lines
14 KiB
C++
512 lines
14 KiB
C++
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/******************************************************************
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Copyright (c) 2000 Microsoft Corporation
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diskcleanup.cpp -- disk cleanup COM object for SR
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Description:
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delete datastores from stale builds
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******************************************************************/
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <windef.h>
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#include <wtypes.h>
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#include <winuser.h>
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#include "diskcleanup.h"
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#include "resource.h"
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#include <utils.h>
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#include <srdefs.h>
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extern HMODULE ghModule;
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//+---------------------------------------------------------------------------
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//
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// Function: CSREmptyVolumeCache2::LoadBootIni
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//
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// Synopsis: parse the boot.ini file
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//
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// Arguments:
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//
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// History: 20-Jul-2000 HenryLee Created
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//
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//----------------------------------------------------------------------------
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DWORD CSREmptyVolumeCache2::LoadBootIni()
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{
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HANDLE hFile = INVALID_HANDLE_VALUE;
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WCHAR *pwszThisGuid = NULL;
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CHAR *pszContent = NULL;
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CHAR *pszLine = NULL;
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DWORD dwErr = ERROR_SUCCESS;
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CHAR szArcName[MAX_PATH];
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CHAR szOptions[MAX_PATH];
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pwszThisGuid = GetMachineGuid (); // always exclude the current datastore
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if (pwszThisGuid != NULL && pwszThisGuid[0] != L'\0')
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{
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lstrcpyW (_wszGuid[_ulGuids], s_cszRestoreDir);
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lstrcatW (_wszGuid[_ulGuids], pwszThisGuid );
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_ulGuids++;
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}
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// Read the contents of the boot.ini file into a string.
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hFile = CreateFileW (L"c:\\boot.ini",
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GENERIC_READ,
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FILE_SHARE_READ,
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NULL, OPEN_EXISTING, 0, NULL);
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if (INVALID_HANDLE_VALUE == hFile)
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{
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dwErr = GetLastError();
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return dwErr;
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}
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DWORD dwBytesRead = 0;
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DWORD dwBytesToRead = GetFileSize(hFile, NULL);
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if (dwBytesToRead == 0xFFFFFFFF || 0 == dwBytesToRead)
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{
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dwErr = GetLastError();
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goto Err;
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}
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pszContent = new CHAR [dwBytesToRead];
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if (pszContent == NULL)
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{
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dwErr = ERROR_NOT_ENOUGH_MEMORY;
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goto Err;
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}
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if (FALSE==ReadFile(hFile, pszContent, dwBytesToRead, &dwBytesRead, NULL))
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{
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dwErr = GetLastError();
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goto Err;
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}
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if (dwBytesToRead != dwBytesRead)
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{
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dwErr = ERROR_READ_FAULT;
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goto Err;
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}
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CloseHandle (hFile);
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hFile = INVALID_HANDLE_VALUE;
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pszLine = pszContent;
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for (UINT i = 0; i < dwBytesRead; i++)
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{
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if (pszContent[i] == '=') // field indicator
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pszContent[i] = '\0'; // process only the 1st field
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if (pszContent[i] == '\n') // end-of-line indicator
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{
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pszContent[i] = '\0';
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if (strncmp (pszLine, "multi", 5) == 0)
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{
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HANDLE hGuidFile;
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WCHAR wcsPath[MAX_PATH];
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WCHAR wcsGuid [RESTOREGUID_STRLEN];
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OBJECT_ATTRIBUTES oa;
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UNICODE_STRING us;
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IO_STATUS_BLOCK iosb;
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wsprintfW (wcsPath, L"\\ArcName\\%hs\\System32\\Restore\\"
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L"MachineGuid.txt", pszLine);
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RtlInitUnicodeString (&us, wcsPath);
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InitializeObjectAttributes ( &oa, &us, OBJ_CASE_INSENSITIVE,
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NULL, NULL);
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NTSTATUS nts = NtCreateFile (&hGuidFile,
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FILE_GENERIC_READ,
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&oa,
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&iosb,
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NULL,
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FILE_ATTRIBUTE_NORMAL,
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FILE_SHARE_WRITE | FILE_SHARE_DELETE | FILE_SHARE_READ,
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FILE_OPEN,
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FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT,
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NULL,
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0);
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if (!NT_SUCCESS(nts))
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{
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dwErr = RtlNtStatusToDosError (nts);
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}
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else
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{
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dwBytesToRead = RESTOREGUID_STRLEN * sizeof(WCHAR);
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DWORD dwRead = 0;
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dwErr = ERROR_SUCCESS;
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if (FALSE == ReadFile (hGuidFile, (BYTE *) wcsGuid,
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dwBytesToRead, &dwRead, NULL))
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{
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dwErr = GetLastError();
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}
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if (_ulGuids < ARRAYSIZE && ERROR_SUCCESS == dwErr)
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{
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lstrcpyW (_wszGuid[_ulGuids], s_cszRestoreDir);
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lstrcatW (_wszGuid[_ulGuids], (wcsGuid[0]==0xFEFF) ?
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&wcsGuid[1] : wcsGuid );
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_ulGuids++;
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}
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NtClose (hGuidFile);
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}
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}
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pszLine = &pszContent [i+1]; // skip to next line
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}
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}
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Err:
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if (pszContent != NULL)
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delete [] pszContent;
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if (hFile != INVALID_HANDLE_VALUE)
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CloseHandle (hFile);
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return dwErr;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSREmptyVolumeCache2::EnumDataStores
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//
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// Synopsis: enumerate the data store on a volume
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//
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// Arguments:
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//
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// History: 20-Jul-2000 HenryLee Created
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//
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//----------------------------------------------------------------------------
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DWORD CSREmptyVolumeCache2::EnumDataStores (DWORDLONG *pdwlSpaceUsed,
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IEmptyVolumeCacheCallBack *picb,
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BOOL fPurge,
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WCHAR *pwszVolume)
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{
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HANDLE hFind = NULL;
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DWORD dwErr = ERROR_SUCCESS;
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WIN32_FIND_DATA wfd;
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WCHAR wcsPath [MAX_PATH];
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*pdwlSpaceUsed = 0;
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if (pwszVolume == NULL || pwszVolume[0] == L'\0') // no volume defined
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return dwErr;
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wsprintfW (wcsPath, L"%s%s\\%s*", pwszVolume,
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s_cszSysVolInfo, s_cszRestoreDir);
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hFind = FindFirstFileW (wcsPath, &wfd);
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if (hFind == INVALID_HANDLE_VALUE) // no files
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return dwErr;
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do
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{
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if (TRUE == _fStop)
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{
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FindClose (hFind);
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return ERROR_OPERATION_ABORTED;
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}
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if (!lstrcmp(wfd.cFileName, L".") || !lstrcmp(wfd.cFileName, L".."))
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continue;
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for (UINT i=0; i < _ulGuids; i++)
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{
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if (lstrcmpi (_wszGuid[i], wfd.cFileName) == 0)
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{
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break; // data store match
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}
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}
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if (i >= _ulGuids) // no data store match
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{
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if (picb != NULL)
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{
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WCHAR wcsDataStore[MAX_PATH];
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lstrcpyW (wcsPath, pwszVolume);
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lstrcatW (wcsPath, s_cszSysVolInfo);
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lstrcatW (wcsPath, L"\\");
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lstrcatW (wcsPath, wfd.cFileName);
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if (!fPurge) // calculate space usage
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{
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dwErr = GetFileSize_Recurse (wcsPath,
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(INT64*) pdwlSpaceUsed,
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&_fStop);
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}
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else // delete the data store
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{
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dwErr = Delnode_Recurse (wcsPath, TRUE, &_fStop);
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}
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}
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else
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{
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*pdwlSpaceUsed = 1; // indicate something to clean up
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}
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}
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}
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while (FindNextFileW (hFind, &wfd));
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FindClose (hFind);
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if (picb != NULL) // update the progress bar
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{
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if (!fPurge)
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picb->ScanProgress (*pdwlSpaceUsed, EVCCBF_LASTNOTIFICATION , NULL);
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else
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picb->PurgeProgress (*pdwlSpaceUsed,0,EVCCBF_LASTNOTIFICATION,NULL);
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}
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return dwErr;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSREmptyVolumeCache2::ForAllMountPoints
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//
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// Synopsis: call EnumerateDataStores for each mount point
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//
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// Arguments:
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//
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// History: 20-Jul-2000 HenryLee Created
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//
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//----------------------------------------------------------------------------
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HRESULT CSREmptyVolumeCache2::ForAllMountPoints (DWORDLONG *pdwlSpaceUsed,
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IEmptyVolumeCacheCallBack *picb,
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BOOL fPurge)
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{
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DWORD dwErr = ERROR_SUCCESS;
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dwErr = EnumDataStores (pdwlSpaceUsed, picb, fPurge, _wszVolume);
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if (ERROR_SUCCESS == dwErr)
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{
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WCHAR wszMount [MAX_PATH];
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HANDLE hFind = FindFirstVolumeMountPoint (_wszVolume,wszMount,MAX_PATH);
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if (hFind != INVALID_HANDLE_VALUE)
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{
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do
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{
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dwErr = EnumDataStores (pdwlSpaceUsed, picb, fPurge, wszMount);
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if (dwErr != ERROR_SUCCESS)
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break;
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}
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while (FindNextVolumeMountPoint (hFind, wszMount, MAX_PATH));
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FindVolumeMountPointClose (hFind);
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}
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}
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return HRESULT_FROM_WIN32 (dwErr);
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSRClassFactory::CreateInstance
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//
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// Synopsis: create the disk cleanup plugin object
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//
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// Arguments:
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//
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// History: 20-Jul-2000 HenryLee Created
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//
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//----------------------------------------------------------------------------
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HRESULT CSRClassFactory::CreateInstance (IUnknown *pUnkOuter,
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REFIID riid,
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void **ppvObject)
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{
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HRESULT hr = S_OK;
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if (pUnkOuter != NULL)
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return CLASS_E_NOAGGREGATION;
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CSREmptyVolumeCache2 *pevc = new CSREmptyVolumeCache2();
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if (pevc == NULL)
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return E_OUTOFMEMORY;
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hr = pevc->QueryInterface (riid, ppvObject);
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pevc->Release(); // release constructor's reference
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return hr;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: CSREmptyVolumeCache2::InitializeEx
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//
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// Synopsis: initialize the disk cleanup plugin object
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//
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// Arguments:
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//
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// History: 20-Jul-2000 HenryLee Created
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//
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//----------------------------------------------------------------------------
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HRESULT CSREmptyVolumeCache2::InitializeEx (
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HKEY hkRegKey,
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const WCHAR *pcwszVolume,
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const WCHAR *pcwszKeyName,
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WCHAR **ppwszDisplayName,
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WCHAR **ppwszDescription,
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WCHAR **ppwszBtnText,
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DWORD *pdwFlags)
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{
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DWORDLONG dwlSpaceUsed = 0;
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WCHAR *pwszDisplay = NULL;
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WCHAR *pwszDescription = NULL;
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HRESULT hr=S_OK;
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pwszDisplay = (WCHAR *) CoTaskMemAlloc (MAX_PATH / 2 * sizeof(WCHAR));
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if (NULL == pwszDisplay)
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{
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hr = E_OUTOFMEMORY;
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goto Err;
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}
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pwszDescription = (WCHAR *) CoTaskMemAlloc (MAX_PATH * 2 * sizeof(WCHAR));
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if (NULL == pwszDescription)
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{
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hr = E_OUTOFMEMORY;
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goto Err;
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}
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if (0 == LoadStringW (ghModule, IDS_DISKCLEANUP_DISPLAY,
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pwszDisplay, MAX_PATH / 2))
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{
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hr = HRESULT_FROM_WIN32 (GetLastError());
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goto Err;
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}
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if (0 == LoadStringW (ghModule, IDS_DISKCLEANUP_DESCRIPTION,
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pwszDescription, MAX_PATH * 2))
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{
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hr = HRESULT_FROM_WIN32 (GetLastError());
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goto Err;
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}
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lstrcpyW (_wszVolume, pcwszVolume);
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|
|
||
|
|
LoadBootIni(); // best effort, okay to fail
|
||
|
|
|
||
|
|
ForAllMountPoints (&dwlSpaceUsed, NULL, FALSE);
|
||
|
|
|
||
|
|
if (pdwFlags)
|
||
|
|
{
|
||
|
|
*pdwFlags |= (EVCF_ENABLEBYDEFAULT |
|
||
|
|
EVCF_ENABLEBYDEFAULT_AUTO |
|
||
|
|
EVCF_DONTSHOWIFZERO);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (dwlSpaceUsed == 0)
|
||
|
|
hr = S_FALSE;
|
||
|
|
|
||
|
|
Err:
|
||
|
|
if (FAILED(hr))
|
||
|
|
{
|
||
|
|
if (pwszDisplay)
|
||
|
|
CoTaskMemFree (pwszDisplay);
|
||
|
|
if (pwszDescription)
|
||
|
|
CoTaskMemFree (pwszDescription);
|
||
|
|
|
||
|
|
if (ppwszDisplayName)
|
||
|
|
*ppwszDisplayName = NULL;
|
||
|
|
if (ppwszDescription)
|
||
|
|
*ppwszDescription = NULL;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (ppwszDisplayName)
|
||
|
|
*ppwszDisplayName = pwszDisplay;
|
||
|
|
if (ppwszDescription)
|
||
|
|
*ppwszDescription = pwszDescription;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ppwszBtnText) // no advanced button text
|
||
|
|
*ppwszBtnText = NULL;
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Function: CSREmptyVolumeCache2::GetSpaceUsed
|
||
|
|
//
|
||
|
|
// Synopsis: returns how much space can be freed on a volume
|
||
|
|
//
|
||
|
|
// Arguments:
|
||
|
|
//
|
||
|
|
// History: 20-Jul-2000 HenryLee Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
HRESULT CSREmptyVolumeCache2::GetSpaceUsed ( DWORDLONG *pdwlSpaceUsed,
|
||
|
|
IEmptyVolumeCacheCallBack *picb)
|
||
|
|
|
||
|
|
{
|
||
|
|
return ForAllMountPoints (pdwlSpaceUsed, picb, FALSE);
|
||
|
|
}
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Function: CSREmptyVolumeCache2::Purge
|
||
|
|
//
|
||
|
|
// Synopsis: frees the disk space on a volume
|
||
|
|
//
|
||
|
|
// Arguments:
|
||
|
|
//
|
||
|
|
// History: 20-Jul-2000 HenryLee Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
HRESULT CSREmptyVolumeCache2::Purge ( DWORDLONG dwlSpaceToFree,
|
||
|
|
IEmptyVolumeCacheCallBack *picb)
|
||
|
|
{
|
||
|
|
return ForAllMountPoints (&dwlSpaceToFree, picb, TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Function: CSREmptyVolumeCache2::Deactivate
|
||
|
|
//
|
||
|
|
// Synopsis: signal the disk cleanup plugin to stop processing
|
||
|
|
//
|
||
|
|
// Arguments:
|
||
|
|
//
|
||
|
|
// History: 20-Jul-2000 HenryLee Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
HRESULT CSREmptyVolumeCache2::Deactivate (DWORD *pdwFlags)
|
||
|
|
{
|
||
|
|
HRESULT hr=S_OK;
|
||
|
|
|
||
|
|
if (pdwFlags)
|
||
|
|
*pdwFlags = 0; // no flags to be returned
|
||
|
|
|
||
|
|
_fStop = TRUE;
|
||
|
|
|
||
|
|
return hr;
|
||
|
|
}
|
||
|
|
|
||
|
|
|