Many hyperlinks are disabled.
Use anonymous login
to enable hyperlinks.
Overview
| Comment: | Fix a potential segfault in the VFS logic that checks for fail renames out from under SQLite. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | apple-osx |
| Files: | files | file ages | folders |
| SHA1: |
650111f66721c33015f89cda4f5afcb6 |
| User & Date: | drh 2015-08-28 15:35:30 |
Context
|
2015-09-01
| ||
| 18:40 | Merge the latest trunk enhancements. (check-in: 4af79477 user: drh tags: apple-osx) | |
|
2015-08-28
| ||
| 15:35 | Fix a potential segfault in the VFS logic that checks for fail renames out from under SQLite. (check-in: 650111f6 user: drh tags: apple-osx) | |
| 13:27 | Disable the read-only WAL-mode database tests on the apple-osx branch because read-only WAL-mode databases are specifically disallowed by Apple-specific changes. (check-in: bd911496 user: drh tags: apple-osx) | |
Changes
Changes to src/os_unix.c.
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 .... 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 .... 6480 6481 6482 6483 6484 6485 6486 6487 6488 6489 6490 6491 6492 6493 6494 |
** (3) The file has not been renamed or unlinked
**
** Issue sqlite3_log(SQLITE_WARNING,...) messages if anything is not right.
*/
static void verifyDbFile(unixFile *pFile){
struct stat buf;
int rc;
if( pFile->ctrlFlags & UNIXFILE_WARNED ){
/* One or more of the following warnings have already been issued. Do not
** repeat them so as not to clutter the error log */
return;
}
rc = osFstat(pFile->h, &buf);
if( rc!=0 ){
................................................................................
/*
** Close the file.
*/
static int nolockClose(sqlite3_file *id) {
int rc = SQLITE_OK;
unixFile *pFile = (unixFile *)id;
unixEnterMutex();
/* unixFile.pInode is always valid here. Otherwise, a different close
** routine (e.g. nolockClose()) would be called instead.
*/
assert( pFile->pInode->nLock>0 || pFile->pInode->bProcessLock==0 );
if( ALWAYS(pFile->pInode) && pFile->pInode->nLock ){
/* If there are outstanding locks, do not actually close the file just
** yet because that would clear those locks. Instead, add the file
** descriptor to pInode->pUnused list. It will be automatically closed
** when the last lock is cleared.
*/
setPendingFd(pFile);
}
releaseInodeInfo(pFile);
rc = closeUnixFile(id);
unixLeaveMutex();
return rc;
}
/******************* End of the no-op lock implementation *********************
******************************************************************************/
................................................................................
}
if( pLockingStyle == &posixIoMethods
#if defined(__APPLE__) && SQLITE_ENABLE_LOCKING_STYLE
|| pLockingStyle == &nfsIoMethods
#endif
/* support WAL mode on read only mounted filesystem */
|| pLockingStyle == &nolockIoMethods
){
unixEnterMutex();
rc = findInodeInfo(pNew, &pNew->pInode);
if( rc!=SQLITE_OK ){
/* If an error occurred in findInodeInfo(), close the file descriptor
** immediately, before releasing the mutex. findInodeInfo() may fail
** in two scenarios:
|
> < < < < > | | | | | | | | | | > | |
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 .... 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 .... 6479 6480 6481 6482 6483 6484 6485 6486 6487 6488 6489 6490 6491 6492 6493 |
** (3) The file has not been renamed or unlinked
**
** Issue sqlite3_log(SQLITE_WARNING,...) messages if anything is not right.
*/
static void verifyDbFile(unixFile *pFile){
struct stat buf;
int rc;
assert( pFile->zPath!=0 || pFile->pInode==0 );
if( pFile->ctrlFlags & UNIXFILE_WARNED ){
/* One or more of the following warnings have already been issued. Do not
** repeat them so as not to clutter the error log */
return;
}
rc = osFstat(pFile->h, &buf);
if( rc!=0 ){
................................................................................
/*
** Close the file.
*/
static int nolockClose(sqlite3_file *id) {
int rc = SQLITE_OK;
unixFile *pFile = (unixFile *)id;
unixEnterMutex();
if( pFile->pInode ){
assert( pFile->pInode->nLock>0 || pFile->pInode->bProcessLock==0 );
if( pFile->pInode->nLock ){
/* If there are outstanding locks, do not actually close the file just
** yet because that would clear those locks. Instead, add the file
** descriptor to pInode->pUnused list. It will be automatically closed
** when the last lock is cleared.
*/
setPendingFd(pFile);
}
releaseInodeInfo(pFile);
}
rc = closeUnixFile(id);
unixLeaveMutex();
return rc;
}
/******************* End of the no-op lock implementation *********************
******************************************************************************/
................................................................................
}
if( pLockingStyle == &posixIoMethods
#if defined(__APPLE__) && SQLITE_ENABLE_LOCKING_STYLE
|| pLockingStyle == &nfsIoMethods
#endif
/* support WAL mode on read only mounted filesystem */
|| (pLockingStyle == &nolockIoMethods && zFilename!=0)
){
unixEnterMutex();
rc = findInodeInfo(pNew, &pNew->pInode);
if( rc!=SQLITE_OK ){
/* If an error occurred in findInodeInfo(), close the file descriptor
** immediately, before releasing the mutex. findInodeInfo() may fail
** in two scenarios:
|