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Overview
| Comment: | Make sure the size parameter to read and write VFS methods in the unix VFS do not become too big or go negative. This was not actually possible in the current code. The checks are added to make sure some future bug does not make it possible. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | daebe3bd2d9bd7b6f876a8110cf5045e |
| User & Date: | drh 2012-10-01 12:16:26 |
Context
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2012-10-01
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| 12:44 | Omit the sqlite3GetReservedNoMutex() routine in build configurations where it is not used. check-in: f193dbb6 user: drh tags: trunk | |
| 12:16 | Make sure the size parameter to read and write VFS methods in the unix VFS do not become too big or go negative. This was not actually possible in the current code. The checks are added to make sure some future bug does not make it possible. check-in: daebe3bd user: drh tags: trunk | |
| 06:50 | Ensure that the value returned by xSectorSize() is reasonable (currently defined as between 2^5 and 2^16 bytes) before using it to calculate the amount of padding to add to a wal file. check-in: 6b4ff83b user: dan tags: trunk | |
Changes
Changes to src/os_unix.c.
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static int seekAndRead(unixFile *id, sqlite3_int64 offset, void *pBuf, int cnt){
int got;
int prior = 0;
#if (!defined(USE_PREAD) && !defined(USE_PREAD64))
i64 newOffset;
#endif
TIMER_START;
do{
#if defined(USE_PREAD)
got = osPread(id->h, pBuf, cnt, offset);
SimulateIOError( got = -1 );
#elif defined(USE_PREAD64)
got = osPread64(id->h, pBuf, cnt, offset);
SimulateIOError( got = -1 );
................................................................................
** is set before returning.
*/
static int seekAndWrite(unixFile *id, i64 offset, const void *pBuf, int cnt){
int got;
#if (!defined(USE_PREAD) && !defined(USE_PREAD64))
i64 newOffset;
#endif
TIMER_START;
#if defined(USE_PREAD)
do{ got = osPwrite(id->h, pBuf, cnt, offset); }while( got<0 && errno==EINTR );
#elif defined(USE_PREAD64)
do{ got = osPwrite64(id->h, pBuf, cnt, offset);}while( got<0 && errno==EINTR);
#else
do{
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static int seekAndRead(unixFile *id, sqlite3_int64 offset, void *pBuf, int cnt){
int got;
int prior = 0;
#if (!defined(USE_PREAD) && !defined(USE_PREAD64))
i64 newOffset;
#endif
TIMER_START;
assert( cnt==(cnt&0x1ffff) );
cnt &= 0x1ffff;
do{
#if defined(USE_PREAD)
got = osPread(id->h, pBuf, cnt, offset);
SimulateIOError( got = -1 );
#elif defined(USE_PREAD64)
got = osPread64(id->h, pBuf, cnt, offset);
SimulateIOError( got = -1 );
................................................................................
** is set before returning.
*/
static int seekAndWrite(unixFile *id, i64 offset, const void *pBuf, int cnt){
int got;
#if (!defined(USE_PREAD) && !defined(USE_PREAD64))
i64 newOffset;
#endif
assert( cnt==(cnt&0x1ffff) );
cnt &= 0x1ffff;
TIMER_START;
#if defined(USE_PREAD)
do{ got = osPwrite(id->h, pBuf, cnt, offset); }while( got<0 && errno==EINTR );
#elif defined(USE_PREAD64)
do{ got = osPwrite64(id->h, pBuf, cnt, offset);}while( got<0 && errno==EINTR);
#else
do{
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