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Add a file-control that will discover the name of the bottom-level VFS and

all the shims in between.

FossilOrigin-Name: cdbfb553af02d10767a905489d9dfc57fc6be54e
This commit is contained in:
drh
2011-12-14 17:53:36 +00:00
parent 43a6d4bd44
commit de60fc2d87
12 changed files with 114 additions and 18 deletions

View File

@@ -206,6 +206,7 @@ struct UnixUnusedFd {
typedef struct unixFile unixFile;
struct unixFile {
sqlite3_io_methods const *pMethod; /* Always the first entry */
sqlite3_vfs *pVfs; /* The VFS that created this unixFile */
unixInodeInfo *pInode; /* Info about locks on this inode */
int h; /* The file descriptor */
unsigned char eFileLock; /* The type of lock held on this fd */
@@ -3533,6 +3534,10 @@ static int unixFileControl(sqlite3_file *id, int op, void *pArg){
}
return SQLITE_OK;
}
case SQLITE_FCNTL_VFSNAME: {
*(char**)pArg = sqlite3_mprintf("%s", pFile->pVfs->zName);
return SQLITE_OK;
}
#ifndef NDEBUG
/* The pager calls this method to signal that it has done
** a rollback and that the database is therefore unchanged and
@@ -4560,6 +4565,7 @@ static int fillInUnixFile(
OSTRACE(("OPEN %-3d %s\n", h, zFilename));
pNew->h = h;
pNew->pVfs = pVfs;
pNew->zPath = zFilename;
if( memcmp(pVfs->zName,"unix-excl",10)==0 ){
pNew->ctrlFlags = UNIXFILE_EXCL;