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Actually look at i-node numbers to determine whether or not the database

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file has moved.

FossilOrigin-Name: 2b1884dc14f9a04a04eebb3245fbe0daaff399eb
This commit is contained in:
drh
2013-12-07 12:29:22 +00:00
parent 091a81b91d
commit b959a017b6
6 changed files with 54 additions and 25 deletions
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18
src/os_unix.c
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@@ -1315,6 +1315,15 @@ static int findInodeInfo(
return SQLITE_OK;
}
/*
** Return TRUE if pFile has been renamed or unlinked since it was first opened.
*/
static int fileHasMoved(unixFile *pFile){
struct stat buf;
return pFile->pInode!=0 &&
(osStat(pFile->zPath, &buf)!=0 || buf.st_ino!=pFile->pInode->fileId.ino);
}
/*
** Check a unixFile that is a database. Verify the following:
@@ -1349,10 +1358,7 @@ static void verifyDbFile(unixFile *pFile){
pFile->ctrlFlags |= UNIXFILE_WARNED;
return;
}
if( pFile->pInode!=0
&& ((rc = osStat(pFile->zPath, &buf))!=0
|| buf.st_ino!=pFile->pInode->fileId.ino)
){
if( fileHasMoved(pFile) ){
sqlite3_log(SQLITE_WARNING, "file renamed while open: %s", pFile->zPath);
pFile->ctrlFlags |= UNIXFILE_WARNED;
return;
@@ -3801,6 +3807,10 @@ static int unixFileControl(sqlite3_file *id, int op, void *pArg){
}
return SQLITE_OK;
}
case SQLITE_FCNTL_HAS_MOVED: {
*(int*)pArg = fileHasMoved(pFile);
return SQLITE_OK;
}
#if SQLITE_MAX_MMAP_SIZE>0
case SQLITE_FCNTL_MMAP_SIZE: {
i64 newLimit = *(i64*)pArg;