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Overview
| Comment: | Fix readDbPage() so that if an SQLITE_IOERR_SHORT_READ is encountered, the page content is zeroed. Ticket #3756. (CVS 6395) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
647e3b156e32e37debd60b0079fc5a52 |
| User & Date: | danielk1977 2009-03-28 06:59:41 |
Context
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2009-03-28
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| 07:03 | Fix a couple of test script bugs. No changes to SQLite code. (CVS 6396) check-in: c9fa329f user: danielk1977 tags: trunk | |
| 06:59 | Fix readDbPage() so that if an SQLITE_IOERR_SHORT_READ is encountered, the page content is zeroed. Ticket #3756. (CVS 6395) check-in: 647e3b15 user: danielk1977 tags: trunk | |
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2009-03-27
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| 15:26 | When "PRAGMA case_sensitive_like" is invoked, override all existing "LIKE" functions, including UTF-16 versions. (CVS 6394) check-in: 1c6521e5 user: danielk1977 tags: trunk | |
Changes
Changes to src/pager.c.
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** The pager is used to access a database disk file. It implements ** atomic commit and rollback through the use of a journal file that ** is separate from the database file. The pager also implements file ** locking to prevent two processes from writing the same database ** file simultaneously, or one process from reading the database while ** another is writing. ** ** @(#) $Id: pager.c,v 1.573 2009/03/26 17:13:06 danielk1977 Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" /* ** Macros for troubleshooting. Normally turned off */ ................................................................................ i64 iOffset; /* Byte offset of file to read from */ assert( pPager->state>=PAGER_SHARED && !MEMDB ); if( !isOpen(pPager->fd) ){ assert( pPager->tempFile ); memset(pPg->pData, 0, pPager->pageSize); return SQLITE_IOERR_SHORT_READ; } iOffset = (pgno-1)*(i64)pPager->pageSize; rc = sqlite3OsRead(pPager->fd, pPg->pData, pPager->pageSize, iOffset); if( pgno==1 ){ u8 *dbFileVers = &((u8*)pPg->pData)[24]; memcpy(&pPager->dbFileVers, dbFileVers, sizeof(pPager->dbFileVers)); } CODEC1(pPager, pPg->pData, pgno, 3); PAGER_INCR(sqlite3_pager_readdb_count); ................................................................................ }else{ memset(pPg->pData, 0, pPager->pageSize); } IOTRACE(("ZERO %p %d\n", pPager, pgno)); }else{ assert( pPg->pPager==pPager ); rc = readDbPage(pPg); if( rc!=SQLITE_OK && rc!=SQLITE_IOERR_SHORT_READ ){ pagerDropPage(pPg); return rc; } } #ifdef SQLITE_CHECK_PAGES pPg->pageHash = pager_pagehash(pPg); #endif |
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** The pager is used to access a database disk file. It implements ** atomic commit and rollback through the use of a journal file that ** is separate from the database file. The pager also implements file ** locking to prevent two processes from writing the same database ** file simultaneously, or one process from reading the database while ** another is writing. ** ** @(#) $Id: pager.c,v 1.574 2009/03/28 06:59:41 danielk1977 Exp $ */ #ifndef SQLITE_OMIT_DISKIO #include "sqliteInt.h" /* ** Macros for troubleshooting. Normally turned off */ ................................................................................ i64 iOffset; /* Byte offset of file to read from */ assert( pPager->state>=PAGER_SHARED && !MEMDB ); if( !isOpen(pPager->fd) ){ assert( pPager->tempFile ); memset(pPg->pData, 0, pPager->pageSize); return SQLITE_OK; } iOffset = (pgno-1)*(i64)pPager->pageSize; rc = sqlite3OsRead(pPager->fd, pPg->pData, pPager->pageSize, iOffset); if( rc==SQLITE_IOERR_SHORT_READ ){ memset(pPg->pData, 0, pPager->pageSize); rc = SQLITE_OK; } if( pgno==1 ){ u8 *dbFileVers = &((u8*)pPg->pData)[24]; memcpy(&pPager->dbFileVers, dbFileVers, sizeof(pPager->dbFileVers)); } CODEC1(pPager, pPg->pData, pgno, 3); PAGER_INCR(sqlite3_pager_readdb_count); ................................................................................ }else{ memset(pPg->pData, 0, pPager->pageSize); } IOTRACE(("ZERO %p %d\n", pPager, pgno)); }else{ assert( pPg->pPager==pPager ); rc = readDbPage(pPg); if( rc!=SQLITE_OK ){ pagerDropPage(pPg); return rc; } } #ifdef SQLITE_CHECK_PAGES pPg->pageHash = pager_pagehash(pPg); #endif |