Don't delete file on close

Author: jlongster

src/api.js

@@ -826,6 +826,7 @@ Module["onRuntimeInitialized"] = function onRuntimeInitialized() {
     function Database(data, { filename = false } = {}) {
         if(filename === false) {
           this.filename = "dbfile_" + (0xffffffff * Math.random() >>> 0);
+          this.memoryFile = true;
           if (data != null) {
             FS.createDataFile("/", this.filename, data, true, true);
           }
@@ -1117,7 +1118,10 @@ Module["onRuntimeInitialized"] = function onRuntimeInitialized() {
         Object.values(this.functions).forEach(removeFunction);
         this.functions = {};
         this.handleError(sqlite3_close_v2(this.db));
-        FS.unlink("/" + this.filename);
+
+        if(this.memoryFile) {
+          FS.unlink("/" + this.filename);
+        }
         this.db = null;
     };
 

src/vfs.c

@@ -24,8 +24,6 @@ static int block_unlock(sqlite3_file *file, int lock) {
 static int block_open(sqlite3_vfs *vfs, const char *zName, sqlite3_file *file, int flags, int *pOutFlags) {
     int res = defaultOpen(vfs, zName, file, flags, pOutFlags);
 
-    printf("Opened!\n");
-
     sqlite3_io_methods* methods = (sqlite3_io_methods*)file->pMethods;
     methods->xDeviceCharacteristics = blockDeviceCharacteristics;
     methods->xLock = block_lock;