diff --git a/source/cell.c b/source/cell.c
index 9db8e0c9..7df1bdaa 100644
--- a/source/cell.c
+++ b/source/cell.c
@@ -819,6 +819,8 @@ int main(int argc, char **argv)
     printf("CRITICAL ERROR: %s\n", SDL_GetError());
     exit(1);
   }
+  
+  printf("main thread is %d\n", SDL_GetThreadID(NULL));
 
 #ifdef TRACY_ENABLE
   tracy_profiling_enabled = profile_enabled;
diff --git a/source/qjs_fd.c b/source/qjs_fd.c
index 9e7ceebf..0831ab89 100644
--- a/source/qjs_fd.c
+++ b/source/qjs_fd.c
@@ -202,6 +202,41 @@ JSC_CCALL(fd_close,
     return JS_UNDEFINED;
 )
 
+JSC_CCALL(fd_fstat,
+    FDWrapper *fdw = js2fd(js, argv[0]);
+    if (!fdw) return JS_EXCEPTION;
+    
+    struct stat st;
+    if (fstat(fdw->fd, &st) != 0)
+        return JS_ThrowReferenceError(js, "fstat failed: %s", strerror(errno));
+    
+    JSValue obj = JS_NewObject(js);
+    JS_SetPropertyStr(js, obj, "size", JS_NewInt64(js, st.st_size));
+    JS_SetPropertyStr(js, obj, "mode", JS_NewInt32(js, st.st_mode));
+    JS_SetPropertyStr(js, obj, "uid", JS_NewInt32(js, st.st_uid));
+    JS_SetPropertyStr(js, obj, "gid", JS_NewInt32(js, st.st_gid));
+    JS_SetPropertyStr(js, obj, "atime", JS_NewInt64(js, st.st_atime));
+    JS_SetPropertyStr(js, obj, "mtime", JS_NewInt64(js, st.st_mtime));
+    JS_SetPropertyStr(js, obj, "ctime", JS_NewInt64(js, st.st_ctime));
+    JS_SetPropertyStr(js, obj, "nlink", JS_NewInt32(js, st.st_nlink));
+    JS_SetPropertyStr(js, obj, "ino", JS_NewInt64(js, st.st_ino));
+    JS_SetPropertyStr(js, obj, "dev", JS_NewInt32(js, st.st_dev));
+    JS_SetPropertyStr(js, obj, "rdev", JS_NewInt32(js, st.st_rdev));
+    JS_SetPropertyStr(js, obj, "blksize", JS_NewInt32(js, st.st_blksize));
+    JS_SetPropertyStr(js, obj, "blocks", JS_NewInt64(js, st.st_blocks));
+    
+    // Add boolean properties for file type
+    JS_SetPropertyStr(js, obj, "isFile", JS_NewBool(js, S_ISREG(st.st_mode)));
+    JS_SetPropertyStr(js, obj, "isDirectory", JS_NewBool(js, S_ISDIR(st.st_mode)));
+    JS_SetPropertyStr(js, obj, "isSymlink", JS_NewBool(js, S_ISLNK(st.st_mode)));
+    JS_SetPropertyStr(js, obj, "isFIFO", JS_NewBool(js, S_ISFIFO(st.st_mode)));
+    JS_SetPropertyStr(js, obj, "isSocket", JS_NewBool(js, S_ISSOCK(st.st_mode)));
+    JS_SetPropertyStr(js, obj, "isCharDevice", JS_NewBool(js, S_ISCHR(st.st_mode)));
+    JS_SetPropertyStr(js, obj, "isBlockDevice", JS_NewBool(js, S_ISBLK(st.st_mode)));
+    
+    return obj;
+)
+
 
 static const JSCFunctionListEntry js_fd_funcs[] = {
     MIST_FUNC_DEF(fd, open, 2),
@@ -213,6 +248,7 @@ static const JSCFunctionListEntry js_fd_funcs[] = {
     MIST_FUNC_DEF(fd, mkdir, 1),
     MIST_FUNC_DEF(fd, fsync, 1),
     MIST_FUNC_DEF(fd, close, 1),
+    MIST_FUNC_DEF(fd, fstat, 1),
 };
 
 JSValue js_fd_use(JSContext *js) {
diff --git a/tests/cat.ce b/tests/cat.ce
new file mode 100644
index 00000000..0b592750
--- /dev/null
+++ b/tests/cat.ce
@@ -0,0 +1,24 @@
+var fd = use('fd')
+var time = use('time')
+var blob = use('blob')
+
+var st = time.number()
+var data = new blob
+var f = fd.open(arg[0], 'r')
+var stat = fd.fstat(f)
+
+function getchunk()
+{
+  var chunk = fd.read(f,stat.blksize)
+  data.write_blob(chunk)
+  if (chunk.length == stat.blksize*8)
+    $_.clock(getchunk)
+  else {
+    log.console(`fd read took ${time.number()-st}`)
+    log.console(stat.blksize)
+    log.console(data.length/8)
+    fd.close(f)    
+  }
+}
+
+getchunk()