c55dab446f
git-svn-id: https://svn.code.sf.net/p/flaim/code/trunk@7 0109f412-320b-0410-ab79-c3e0c5ffbbe6
388 lines
8.3 KiB
C++
388 lines
8.3 KiB
C++
//-------------------------------------------------------------------------
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// Desc: Delete a database.
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// Tabs: 3
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//
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// Copyright (c) 2001-2003,2005-2006 Novell, Inc. All Rights Reserved.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the GNU General Public
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// License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, contact Novell, Inc.
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//
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// To contact Novell about this file by physical or electronic mail,
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// you may find current contact information at www.novell.com
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//
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// $Id: fdbremov.cpp 12329 2006-01-20 17:49:30 -0700 (Fri, 20 Jan 2006) ahodgkinson $
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//-------------------------------------------------------------------------
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#include "flaimsys.h"
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/*******************************************************************************
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Desc: Removes a database, including roll-forward log files, if requested.
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*******************************************************************************/
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RCODE FlmDbRemove(
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const char * pszDbName,
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const char * pszDataDir,
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const char * pszRflDir,
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FLMBOOL bRemoveRflFiles)
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{
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RCODE rc = FERR_OK;
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F_FileHdlImp * pFileHdl = NULL;
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FLMBYTE * pucBuffer = NULL;
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FLMUINT uiFileNumber;
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FILE_HDR FileHdr;
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LOG_HDR LogHdr;
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char * pszTmpName = NULL;
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char * pszRflDirName;
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char * pszDataName;
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char * pszBaseName;
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FLMBYTE * pucLogHdr;
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char szPrefix[ F_FILENAME_SIZE];
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char * pszExt;
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char * pszDataExt;
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F_DirHdl * pDirHdl = NULL;
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// Cannot handle empty database name.
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if( !pszDbName || !(*pszDbName))
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{
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rc = RC_SET( FERR_IO_INVALID_PATH);
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goto Exit;
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}
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// Allocate memory, so as to not consume stack.
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if( RC_BAD( rc = f_alloc( F_PATH_MAX_SIZE * 3 + F_FILENAME_SIZE +
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LOG_HEADER_SIZE, &pszTmpName)))
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{
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goto Exit;
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}
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pszRflDirName = pszTmpName + F_PATH_MAX_SIZE;
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pszDataName = pszRflDirName + F_PATH_MAX_SIZE;
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pszBaseName = pszDataName + F_PATH_MAX_SIZE;
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pucLogHdr =(FLMBYTE *)(pszBaseName + F_FILENAME_SIZE);
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// First make sure we have closed this database and gotten rid of
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// it from our internal memory tables - in case it had been open.
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if (RC_BAD( rc = FlmConfig( FLM_CLOSE_FILE, (void *)pszDbName,
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(void *)pszDataDir)))
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{
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goto Exit;
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}
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// Open the file so we can get the log header.
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if( RC_BAD( rc = gv_FlmSysData.pFileSystem->Open(
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pszDbName, F_IO_RDWR | F_IO_SH_DENYNONE | F_IO_DIRECT,
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(F_FileHdl **)&pFileHdl)))
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{
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goto Exit;
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}
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// Allocate a buffer for reading the header stuff.
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if (RC_BAD( rc = f_alloc( 2048, &pucBuffer)))
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{
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goto Exit;
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}
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// Read the header to get the low and high RFL log
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// file numbers.
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if (RC_BAD( flmReadAndVerifyHdrInfo( NULL, pFileHdl,
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pucBuffer, &FileHdr, &LogHdr, pucLogHdr)))
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{
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goto Exit;
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}
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// Close the file.
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pFileHdl->Release();
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pFileHdl = NULL;
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if (pszDataDir && *pszDataDir)
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{
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if (RC_BAD( rc = f_pathReduce( pszDbName, pszDataName, pszBaseName)))
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{
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goto Exit;
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}
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f_strcpy( pszDataName, pszDataDir);
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if (RC_BAD( rc = f_pathAppend( pszDataName, pszBaseName)))
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{
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goto Exit;
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}
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}
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else
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{
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f_strcpy( pszDataName, pszDbName);
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}
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f_strcpy( pszTmpName, pszDbName);
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// Start deleting files, beginning with the main DB file.
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if (RC_BAD( rc = gv_FlmSysData.pFileSystem->Delete( pszDbName)))
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{
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if (rc == FERR_IO_PATH_NOT_FOUND || rc == FERR_IO_INVALID_PATH)
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{
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rc = FERR_OK;
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}
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else
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{
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goto Exit;
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}
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}
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// Find where the extension of the database name is
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pszExt = pszTmpName + f_strlen( pszTmpName) - 1;
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pszDataExt = pszDataName + f_strlen( pszDataName) - 1;
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while (pszExt != pszTmpName && *pszExt != '.')
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{
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pszExt--;
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// Both the db name and data name have the same
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// base name, so we can decrement pszDataExt
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// at the same time we decrement pszExt.
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pszDataExt--;
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}
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if (*pszExt != '.')
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{
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pszExt = pszTmpName + f_strlen( pszTmpName);
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pszDataExt = pszDataName + f_strlen( pszDataName);
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}
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// Delete the .lck file, if any
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f_strcpy( pszExt, ".lck");
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if (RC_BAD( rc = gv_FlmSysData.pFileSystem->Delete( pszTmpName)))
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{
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if (rc == FERR_IO_PATH_NOT_FOUND || rc == FERR_IO_INVALID_PATH)
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{
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rc = FERR_OK;
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}
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else
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{
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goto Exit;
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}
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}
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// Delete block (data) files.
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uiFileNumber = 1;
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for (;;)
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{
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bldSuperFileExtension( FileHdr.uiVersionNum,
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uiFileNumber, pszDataExt);
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if (RC_BAD( rc = gv_FlmSysData.pFileSystem->Delete( pszDataName)))
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{
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if (rc == FERR_IO_PATH_NOT_FOUND || rc == FERR_IO_INVALID_PATH)
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{
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rc = FERR_OK;
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break;
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}
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else
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{
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goto Exit;
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}
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}
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if (uiFileNumber ==
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MAX_DATA_BLOCK_FILE_NUMBER( FileHdr.uiVersionNum))
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{
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break;
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}
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uiFileNumber++;
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}
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// Delete rollback log files.
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uiFileNumber =
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FIRST_LOG_BLOCK_FILE_NUMBER( FileHdr.uiVersionNum);
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for (;;)
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{
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bldSuperFileExtension( FileHdr.uiVersionNum,
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uiFileNumber, pszExt);
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if (RC_BAD( rc = gv_FlmSysData.pFileSystem->Delete( pszTmpName)))
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{
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if (rc == FERR_IO_PATH_NOT_FOUND || rc == FERR_IO_INVALID_PATH)
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{
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rc = FERR_OK;
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break;
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}
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else
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{
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goto Exit;
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}
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}
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if (uiFileNumber ==
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MAX_LOG_BLOCK_FILE_NUMBER( FileHdr.uiVersionNum))
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{
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break;
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}
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uiFileNumber++;
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}
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if (bRemoveRflFiles)
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{
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// Delete roll-forward log files.
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if (FileHdr.uiVersionNum < FLM_VER_4_3)
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{
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// For pre-4.3 versions, only need to delete one RFL file.
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if (RC_BAD( rc = rflGetFileName( FileHdr.uiVersionNum,
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pszDbName, pszRflDir, 1, pszTmpName)))
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{
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goto Exit;
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}
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if (RC_BAD( rc = gv_FlmSysData.pFileSystem->Delete( pszTmpName)))
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{
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if (rc == FERR_IO_PATH_NOT_FOUND || rc == FERR_IO_INVALID_PATH)
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{
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rc = FERR_OK;
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}
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else
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{
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goto Exit;
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}
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}
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}
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else
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{
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FLMBOOL bCanDeleteDir;
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// For 4.3 and greater, need to scan the RFL directory for
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// RFL files.
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if (RC_BAD( rc = rflGetDirAndPrefix( FileHdr.uiVersionNum,
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pszDbName, pszRflDir, pszRflDirName, szPrefix)))
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{
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goto Exit;
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}
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// See if the directory exists. If not, we are done.
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if (!gv_FlmSysData.pFileSystem->IsDir( pszRflDirName))
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{
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goto Exit; // Should return FERR_OK
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}
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// Open the directory and scan for RFL files.
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// NOTE: DO NOT just call RemoveDir. There may be other
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// things in the directory that we do not want to delete.
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// Look specifically for files that match our expected
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// name format for RFL files.
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if (RC_BAD( rc = gv_FlmSysData.pFileSystem->OpenDir( pszRflDirName,
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"*", &pDirHdl)))
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{
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goto Exit;
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}
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// Assume that we can delete the directory. This will only
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// be set to FALSE if we can't delete all of the files in
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// the directory - i.e., some don't look like RFL log files.
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bCanDeleteDir = TRUE;
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for (;;)
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{
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if (RC_BAD( rc = pDirHdl->Next()))
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{
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if (rc == FERR_IO_NO_MORE_FILES)
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{
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rc = FERR_OK;
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break;
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}
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else
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{
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goto Exit;
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}
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}
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pDirHdl->CurrentItemPath( pszTmpName);
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if (pDirHdl->CurrentItemIsDir())
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{
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bCanDeleteDir = FALSE;
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}
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else if (!rflGetFileNum( FileHdr.uiVersionNum,
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szPrefix, pszTmpName, &uiFileNumber))
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{
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bCanDeleteDir = FALSE;
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}
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else
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{
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if( RC_BAD( rc =
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gv_FlmSysData.pFileSystem->Delete( pszTmpName)))
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{
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if (rc == FERR_IO_PATH_NOT_FOUND ||
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rc == FERR_IO_INVALID_PATH)
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{
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rc = FERR_OK;
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}
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else
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{
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goto Exit;
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}
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}
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}
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}
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// Attempt to delete the directory - if allowed.
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if (bCanDeleteDir)
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{
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// Need to release the directory handle so the
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// directory will be closed when we try to delete it
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// below.
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if (pDirHdl)
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{
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pDirHdl->Release();
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pDirHdl = NULL;
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}
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if (RC_BAD( rc = gv_FlmSysData.pFileSystem->RemoveDir( pszRflDirName)))
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{
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if (rc == FERR_IO_PATH_NOT_FOUND || rc == FERR_IO_INVALID_PATH)
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{
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rc = FERR_OK;
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}
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goto Exit;
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}
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}
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}
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}
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Exit:
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if (pszTmpName)
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{
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f_free( &pszTmpName);
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}
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if (pFileHdl)
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{
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pFileHdl->Release();
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}
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if (pucBuffer)
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{
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f_free( &pucBuffer);
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}
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if (pDirHdl)
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{
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pDirHdl->Release();
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}
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return( rc);
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}
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