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Overview
| Comment: | Make the initial salt values in the WAL header random values, not zero. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
baa5eddd0539342945c14a2793c2579e |
| User & Date: | drh 2010-07-07 21:06:49 |
Context
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2010-07-08
| ||
| 03:13 | Changes to os_win.c to have it simulate IO errors like os_unix.c. check-in: 0d53da94 user: shaneh tags: trunk | |
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2010-07-07
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| 21:06 | Make the initial salt values in the WAL header random values, not zero. check-in: baa5eddd user: drh tags: trunk | |
| 20:38 | Add the write-ahead log viewer/debugger tool to the tools/ folder. check-in: 0e4bd446 user: drh tags: trunk | |
Changes
Changes to src/wal.c.
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return SQLITE_NOMEM;
}
pRet->pVfs = pVfs;
pRet->pWalFd = (sqlite3_file *)&pRet[1];
pRet->pDbFd = pDbFd;
pRet->readLock = -1;
sqlite3_randomness(8, &pRet->hdr.aSalt);
pRet->zWalName = zWalName;
rc = sqlite3OsShmOpen(pDbFd);
/* Open file handle on the write-ahead log file. */
if( rc==SQLITE_OK ){
pRet->isWIndexOpen = 1;
flags = (SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|SQLITE_OPEN_MAIN_JOURNAL);
................................................................................
u8 aWalHdr[WAL_HDRSIZE]; /* Buffer to assemble wal-header in */
u32 aCksum[2]; /* Checksum for wal-header */
sqlite3Put4byte(&aWalHdr[0], (WAL_MAGIC | SQLITE_BIGENDIAN));
sqlite3Put4byte(&aWalHdr[4], WAL_MAX_VERSION);
sqlite3Put4byte(&aWalHdr[8], szPage);
sqlite3Put4byte(&aWalHdr[12], pWal->nCkpt);
memcpy(&aWalHdr[16], pWal->hdr.aSalt, 8);
walChecksumBytes(1, aWalHdr, WAL_HDRSIZE-2*4, 0, aCksum);
sqlite3Put4byte(&aWalHdr[24], aCksum[0]);
sqlite3Put4byte(&aWalHdr[28], aCksum[1]);
pWal->szPage = (u16)szPage;
pWal->hdr.bigEndCksum = SQLITE_BIGENDIAN;
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return SQLITE_NOMEM;
}
pRet->pVfs = pVfs;
pRet->pWalFd = (sqlite3_file *)&pRet[1];
pRet->pDbFd = pDbFd;
pRet->readLock = -1;
pRet->zWalName = zWalName;
rc = sqlite3OsShmOpen(pDbFd);
/* Open file handle on the write-ahead log file. */
if( rc==SQLITE_OK ){
pRet->isWIndexOpen = 1;
flags = (SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE|SQLITE_OPEN_MAIN_JOURNAL);
................................................................................
u8 aWalHdr[WAL_HDRSIZE]; /* Buffer to assemble wal-header in */
u32 aCksum[2]; /* Checksum for wal-header */
sqlite3Put4byte(&aWalHdr[0], (WAL_MAGIC | SQLITE_BIGENDIAN));
sqlite3Put4byte(&aWalHdr[4], WAL_MAX_VERSION);
sqlite3Put4byte(&aWalHdr[8], szPage);
sqlite3Put4byte(&aWalHdr[12], pWal->nCkpt);
sqlite3_randomness(8, pWal->hdr.aSalt);
memcpy(&aWalHdr[16], pWal->hdr.aSalt, 8);
walChecksumBytes(1, aWalHdr, WAL_HDRSIZE-2*4, 0, aCksum);
sqlite3Put4byte(&aWalHdr[24], aCksum[0]);
sqlite3Put4byte(&aWalHdr[28], aCksum[1]);
pWal->szPage = (u16)szPage;
pWal->hdr.bigEndCksum = SQLITE_BIGENDIAN;
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