diff --git a/interfaces/kits/js/src/mod_fs/properties/prop_n_exporter.cpp b/interfaces/kits/js/src/mod_fs/properties/prop_n_exporter.cpp
index badeb0d65b1ff64eafb04b8388e5b798625d18f0..55668a336256b50e4e431c1b3e1995d93d32815d 100644
--- a/interfaces/kits/js/src/mod_fs/properties/prop_n_exporter.cpp
+++ b/interfaces/kits/js/src/mod_fs/properties/prop_n_exporter.cpp
@@ -330,8 +330,10 @@ napi_value PropNExporter::ReadSync(napi_env env, napi_callback_info info)
         NError(EINVAL).ThrowErr(env);
         return nullptr;
     }
+    if (!hasOffset) {
+        offset = -1;
+    }
 
-    ssize_t actLen;
     uv_buf_t buffer = uv_buf_init(static_cast<char *>(buf), len);
     std::unique_ptr<uv_fs_t, decltype(CommonFunc::fs_req_cleanup)*> read_req = {
         new uv_fs_t, CommonFunc::fs_req_cleanup };
@@ -346,8 +348,8 @@ napi_value PropNExporter::ReadSync(napi_env env, napi_callback_info info)
         NError(errno).ThrowErr(env);
         return nullptr;
     }
-    actLen = ret;
-    return NVal::CreateInt64(env, actLen).val_;
+
+    return NVal::CreateInt64(env, ret).val_;
 }
 
 static NError ReadExec(shared_ptr<AsyncIOReadArg> arg, char *buf, size_t len, int fd, size_t offset)
@@ -397,6 +399,9 @@ napi_value PropNExporter::Read(napi_env env, napi_callback_info info)
         NError(EINVAL).ThrowErr(env);
         return nullptr;
     }
+    if (!hasOffset) {
+        offset = -1;
+    }
 
     auto arg = make_shared<AsyncIOReadArg>(NVal(env, funcArg[NARG_POS::SECOND]));
     if (!arg) {
@@ -481,6 +486,9 @@ napi_value PropNExporter::Write(napi_env env, napi_callback_info info)
         NError(EINVAL).ThrowErr(env);
         return nullptr;
     }
+    if (!hasOffset) {
+        offset = -1;
+    }
 
     auto arg = make_shared<AsyncIOWrtieArg>(move(bufGuard));
     if (!arg) {
@@ -548,8 +556,10 @@ napi_value PropNExporter::WriteSync(napi_env env, napi_callback_info info)
         HILOGE("Failed to resolve buf and options");
         return nullptr;
     }
+    if (!hasOffset) {
+        offset = -1;
+    }
 
-    ssize_t writeLen;
     uv_buf_t buffer = uv_buf_init(static_cast<char *>(buf), len);
     std::unique_ptr<uv_fs_t, decltype(CommonFunc::fs_req_cleanup)*> write_req = {
         new uv_fs_t, CommonFunc::fs_req_cleanup };
@@ -564,8 +574,8 @@ napi_value PropNExporter::WriteSync(napi_env env, napi_callback_info info)
         NError(errno).ThrowErr(env);
         return nullptr;
     }
-    writeLen = ret;
-    return NVal::CreateInt64(env, writeLen).val_;
+
+    return NVal::CreateInt64(env, ret).val_;
 }
 
 bool PropNExporter::Export()