Add the SQLITE_FCNTL_TEMPFILENAME file control that asks the underlying VFS

to return a new temporary filename.  Per request from NSS team at Mozilla.

FossilOrigin-Name: 1a63b1d5fa5d79f96eddbda6d94bc10248863710

1 files changed, 11 insertions, 0 deletions

diff --git a/src/os_unix.c b/src/os_unix.c
index a3a012126..315f15018 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -3581,6 +3581,9 @@ static void unixModeBit(unixFile *pFile, unsigned char mask, int *pArg){
   }
 }
 
+/* Forward declaration */
+static int unixGetTempname(int nBuf, char *zBuf);
+
 /*
 ** Information and control of an open file handle.
 */
@@ -3618,6 +3621,14 @@ static int unixFileControl(sqlite3_file *id, int op, void *pArg){
       *(char**)pArg = sqlite3_mprintf("%s", pFile->pVfs->zName);
       return SQLITE_OK;
     }
+    case SQLITE_FCNTL_TEMPFILENAME: {
+      char *zTFile = sqlite3_malloc( pFile->pVfs->mxPathname );
+      if( zTFile ){
+        unixGetTempname(pFile->pVfs->mxPathname, zTFile);
+        *(char**)pArg = zTFile;
+      }
+      return SQLITE_OK;
+    }
 #ifdef SQLITE_DEBUG
     /* The pager calls this method to signal that it has done
     ** a rollback and that the database is therefore unchanged and