diff --git a/encoding/gcompress/gcompress_z_unit_gzip_test.go b/encoding/gcompress/gcompress_z_unit_gzip_test.go
index 2e43558fa..77bb4fc95 100644
--- a/encoding/gcompress/gcompress_z_unit_gzip_test.go
+++ b/encoding/gcompress/gcompress_z_unit_gzip_test.go
@@ -44,8 +44,8 @@ func Test_Gzip_UnGzip(t *testing.T) {
 
 func Test_Gzip_UnGzip_File(t *testing.T) {
 	srcPath := gdebug.TestDataPath("gzip", "file.txt")
-	dstPath1 := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr(), "gzip.zip")
-	dstPath2 := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr(), "file.txt")
+	dstPath1 := gfile.TempDir(gtime.TimestampNanoStr(), "gzip.zip")
+	dstPath2 := gfile.TempDir(gtime.TimestampNanoStr(), "file.txt")
 
 	// Compress.
 	gtest.C(t, func(t *gtest.T) {
diff --git a/encoding/gcompress/gcompress_z_unit_zip_test.go b/encoding/gcompress/gcompress_z_unit_zip_test.go
index 757675b20..fce4d4b51 100644
--- a/encoding/gcompress/gcompress_z_unit_zip_test.go
+++ b/encoding/gcompress/gcompress_z_unit_zip_test.go
@@ -29,7 +29,7 @@ func Test_ZipPath(t *testing.T) {
 		t.Assert(gfile.Exists(dstPath), true)
 		defer gfile.Remove(dstPath)
 
-		tempDirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		tempDirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(tempDirPath)
 		t.Assert(err, nil)
 
@@ -58,7 +58,7 @@ func Test_ZipPath(t *testing.T) {
 		t.Assert(gfile.Exists(dstPath), true)
 		defer gfile.Remove(dstPath)
 
-		tempDirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		tempDirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(tempDirPath)
 		t.Assert(err, nil)
 
@@ -93,7 +93,7 @@ func Test_ZipPath(t *testing.T) {
 		t.Assert(gfile.Exists(dstPath), true)
 		defer gfile.Remove(dstPath)
 
-		tempDirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		tempDirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(tempDirPath)
 		t.Assert(err, nil)
 
@@ -131,7 +131,7 @@ func Test_ZipPathWriter(t *testing.T) {
 		t.Assert(err, nil)
 		t.AssertGT(writer.Len(), 0)
 
-		tempDirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		tempDirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(tempDirPath)
 		t.Assert(err, nil)
 
diff --git a/frame/gins/gins_z_unit_config_test.go b/frame/gins/gins_z_unit_config_test.go
index 4e1bc4a6e..2ab5bf0c0 100644
--- a/frame/gins/gins_z_unit_config_test.go
+++ b/frame/gins/gins_z_unit_config_test.go
@@ -39,7 +39,7 @@ func Test_Config2(t *testing.T) {
 	// relative path
 	gtest.C(t, func(t *gtest.T) {
 		var err error
-		dirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		dirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(dirPath)
 		t.Assert(err, nil)
 		defer gfile.Remove(dirPath)
@@ -63,7 +63,7 @@ func Test_Config2(t *testing.T) {
 	// relative path, config folder
 	gtest.C(t, func(t *gtest.T) {
 		var err error
-		dirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		dirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(dirPath)
 		t.Assert(err, nil)
 		defer gfile.Remove(dirPath)
@@ -89,7 +89,7 @@ func Test_Config2(t *testing.T) {
 func Test_Config3(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		var err error
-		dirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		dirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(dirPath)
 		t.Assert(err, nil)
 		defer gfile.Remove(dirPath)
@@ -113,7 +113,7 @@ func Test_Config3(t *testing.T) {
 
 	gtest.C(t, func(t *gtest.T) {
 		var err error
-		dirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		dirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(dirPath)
 		t.Assert(err, nil)
 		defer gfile.Remove(dirPath)
diff --git a/frame/gins/gins_z_unit_database_test.go b/frame/gins/gins_z_unit_database_test.go
index 44ea6c22c..ce85196f9 100644
--- a/frame/gins/gins_z_unit_database_test.go
+++ b/frame/gins/gins_z_unit_database_test.go
@@ -23,7 +23,7 @@ func Test_Database(t *testing.T) {
 	)
 	gtest.C(t, func(t *gtest.T) {
 		var err error
-		dirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		dirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(dirPath)
 		t.Assert(err, nil)
 		defer gfile.Remove(dirPath)
diff --git a/frame/gins/gins_z_unit_redis_test.go b/frame/gins/gins_z_unit_redis_test.go
index 0a7e6a86d..3619b1dd5 100644
--- a/frame/gins/gins_z_unit_redis_test.go
+++ b/frame/gins/gins_z_unit_redis_test.go
@@ -24,7 +24,7 @@ func Test_Redis(t *testing.T) {
 
 	gtest.C(t, func(t *gtest.T) {
 		var err error
-		dirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		dirPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(dirPath)
 		t.Assert(err, nil)
 		defer gfile.Remove(dirPath)
diff --git a/net/ghttp/ghttp_unit_log_test.go b/net/ghttp/ghttp_unit_log_test.go
index aca814df0..496002c00 100644
--- a/net/ghttp/ghttp_unit_log_test.go
+++ b/net/ghttp/ghttp_unit_log_test.go
@@ -23,7 +23,7 @@ import (
 
 func Test_Log(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		logDir := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		logDir := gfile.TempDir(gtime.TimestampNanoStr())
 		p := ports.PopRand()
 		s := g.Server(p)
 		s.BindHandler("/hello", func(r *ghttp.Request) {
diff --git a/net/ghttp/ghttp_unit_param_file_test.go b/net/ghttp/ghttp_unit_param_file_test.go
index 1d5b9ac2c..dbb952d2e 100644
--- a/net/ghttp/ghttp_unit_param_file_test.go
+++ b/net/ghttp/ghttp_unit_param_file_test.go
@@ -21,7 +21,7 @@ import (
 )
 
 func Test_Params_File_Single(t *testing.T) {
-	dstDirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+	dstDirPath := gfile.TempDir(gtime.TimestampNanoStr())
 	p := ports.PopRand()
 	s := g.Server(p)
 	s.BindHandler("/upload/single", func(r *ghttp.Request) {
@@ -75,7 +75,7 @@ func Test_Params_File_Single(t *testing.T) {
 }
 
 func Test_Params_File_CustomName(t *testing.T) {
-	dstDirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+	dstDirPath := gfile.TempDir(gtime.TimestampNanoStr())
 	p := ports.PopRand()
 	s := g.Server(p)
 	s.BindHandler("/upload/single", func(r *ghttp.Request) {
@@ -112,7 +112,7 @@ func Test_Params_File_CustomName(t *testing.T) {
 }
 
 func Test_Params_File_Batch(t *testing.T) {
-	dstDirPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+	dstDirPath := gfile.TempDir(gtime.TimestampNanoStr())
 	p := ports.PopRand()
 	s := g.Server(p)
 	s.BindHandler("/upload/batch", func(r *ghttp.Request) {
diff --git a/os/gcfg/gcfg_z_unit_test.go b/os/gcfg/gcfg_z_unit_test.go
index bd2fc94e5..347cebcc8 100644
--- a/os/gcfg/gcfg_z_unit_test.go
+++ b/os/gcfg/gcfg_z_unit_test.go
@@ -362,7 +362,7 @@ func TestCfg_FilePath(t *testing.T) {
 func TestCfg_Get(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		var err error
-		configPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		configPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err = gfile.Mkdir(configPath)
 		t.Assert(err, nil)
 		defer gfile.Remove(configPath)
diff --git a/os/gfile/gfile_z_copy_test.go b/os/gfile/gfile_z_copy_test.go
index d45a096d1..d66ecdb5d 100644
--- a/os/gfile/gfile_z_copy_test.go
+++ b/os/gfile/gfile_z_copy_test.go
@@ -49,8 +49,8 @@ func Test_CopyFile(t *testing.T) {
 	})
 	// Content replacement.
 	gtest.C(t, func(t *gtest.T) {
-		src := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
-		dst := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		src := gfile.TempDir(gtime.TimestampNanoStr())
+		dst := gfile.TempDir(gtime.TimestampNanoStr())
 		srcContent := "1"
 		dstContent := "1"
 		gfile.PutContents(src, srcContent)
@@ -115,8 +115,8 @@ func Test_CopyDir(t *testing.T) {
 	})
 	// Content replacement.
 	gtest.C(t, func(t *gtest.T) {
-		src := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr(), gtime.TimestampNanoStr())
-		dst := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr(), gtime.TimestampNanoStr())
+		src := gfile.TempDir(gtime.TimestampNanoStr(), gtime.TimestampNanoStr())
+		dst := gfile.TempDir(gtime.TimestampNanoStr(), gtime.TimestampNanoStr())
 		srcContent := "1"
 		dstContent := "1"
 		gfile.PutContents(src, srcContent)
diff --git a/os/gfpool/gfpool_z_unit_concurrent_test.go b/os/gfpool/gfpool_z_unit_concurrent_test.go
index 4b52c4668..4391118d7 100644
--- a/os/gfpool/gfpool_z_unit_concurrent_test.go
+++ b/os/gfpool/gfpool_z_unit_concurrent_test.go
@@ -12,7 +12,7 @@ import (
 
 func Test_ConcurrentOS(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		defer gfile.Remove(path)
 		f1, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC|os.O_APPEND, 0666)
 		t.Assert(err, nil)
@@ -43,7 +43,7 @@ func Test_ConcurrentOS(t *testing.T) {
 	})
 
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		defer gfile.Remove(path)
 		f1, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC|os.O_APPEND, 0666)
 		t.Assert(err, nil)
@@ -64,7 +64,7 @@ func Test_ConcurrentOS(t *testing.T) {
 		t.Assert(gstr.Count(gfile.GetContents(path), "@1234567890#"), 2000)
 	})
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		defer gfile.Remove(path)
 		f1, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC|os.O_APPEND, 0666)
 		t.Assert(err, nil)
@@ -92,7 +92,7 @@ func Test_ConcurrentOS(t *testing.T) {
 	})
 	// DATA RACE
 	//gtest.C(t, func(t *gtest.T) {
-	//	path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+	//	path := gfile.TempDir(gtime.TimestampNanoStr())
 	//	defer gfile.Remove(path)
 	//	f1, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC|os.O_APPEND, 0666)
 	//	t.Assert(err, nil)
@@ -130,7 +130,7 @@ func Test_ConcurrentOS(t *testing.T) {
 
 func Test_ConcurrentGFPool(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		defer gfile.Remove(path)
 		f1, err := gfpool.Open(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC|os.O_APPEND, 0666)
 		t.Assert(err, nil)
@@ -152,7 +152,7 @@ func Test_ConcurrentGFPool(t *testing.T) {
 	})
 	// DATA RACE
 	//gtest.C(t, func(t *gtest.T) {
-	//	path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+	//	path := gfile.TempDir(gtime.TimestampNanoStr())
 	//	defer gfile.Remove(path)
 	//	f1, err := gfpool.Open(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC|os.O_APPEND, 0666)
 	//	t.Assert(err, nil)
diff --git a/os/gfsnotify/gfsnotify_z_unit_test.go b/os/gfsnotify/gfsnotify_z_unit_test.go
index a4640bda2..46b8a39e0 100644
--- a/os/gfsnotify/gfsnotify_z_unit_test.go
+++ b/os/gfsnotify/gfsnotify_z_unit_test.go
@@ -21,7 +21,7 @@ import (
 func TestWatcher_AddOnce(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		value := gtype.New()
-		path := gfile.Join(gfile.TempDir(), gconv.String(gtime.TimestampNano()))
+		path := gfile.TempDir(gconv.String(gtime.TimestampNano()))
 		err := gfile.PutContents(path, "init")
 		t.Assert(err, nil)
 		defer gfile.Remove(path)
diff --git a/os/glog/glog_z_unit_chaining_test.go b/os/glog/glog_z_unit_chaining_test.go
index 961278173..d6360cce7 100644
--- a/os/glog/glog_z_unit_chaining_test.go
+++ b/os/glog/glog_z_unit_chaining_test.go
@@ -29,7 +29,7 @@ func Test_To(t *testing.T) {
 
 func Test_Path(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -47,7 +47,7 @@ func Test_Path(t *testing.T) {
 func Test_Cat(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		cat := "category"
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -64,7 +64,7 @@ func Test_Cat(t *testing.T) {
 
 func Test_Level(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -81,7 +81,7 @@ func Test_Level(t *testing.T) {
 
 func Test_Skip(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -99,7 +99,7 @@ func Test_Skip(t *testing.T) {
 
 func Test_Stack(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -117,7 +117,7 @@ func Test_Stack(t *testing.T) {
 
 func Test_StackWithFilter(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -131,7 +131,7 @@ func Test_StackWithFilter(t *testing.T) {
 		t.Assert(gstr.Count(content, "Stack"), 1)
 	})
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -148,7 +148,7 @@ func Test_StackWithFilter(t *testing.T) {
 
 func Test_Header(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -161,7 +161,7 @@ func Test_Header(t *testing.T) {
 		t.Assert(gstr.Count(content, "1 2 3"), 1)
 	})
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -177,7 +177,7 @@ func Test_Header(t *testing.T) {
 
 func Test_Line(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -192,7 +192,7 @@ func Test_Line(t *testing.T) {
 		t.Assert(gstr.Contains(content, gfile.Separator), true)
 	})
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -210,7 +210,7 @@ func Test_Line(t *testing.T) {
 
 func Test_Async(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
@@ -228,7 +228,7 @@ func Test_Async(t *testing.T) {
 	})
 
 	gtest.C(t, func(t *gtest.T) {
-		path := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		path := gfile.TempDir(gtime.TimestampNanoStr())
 		file := fmt.Sprintf(`%d.log`, gtime.TimestampNano())
 
 		err := gfile.Mkdir(path)
diff --git a/os/glog/glog_z_unit_concurrent_test.go b/os/glog/glog_z_unit_concurrent_test.go
index 0197cf9f4..1378e2278 100644
--- a/os/glog/glog_z_unit_concurrent_test.go
+++ b/os/glog/glog_z_unit_concurrent_test.go
@@ -22,7 +22,7 @@ func Test_Concurrent(t *testing.T) {
 		l := glog.New()
 		s := "@1234567890#"
 		f := "test.log"
-		p := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		p := gfile.TempDir(gtime.TimestampNanoStr())
 		t.Assert(l.SetPath(p), nil)
 		defer gfile.Remove(p)
 		wg := sync.WaitGroup{}
diff --git a/os/glog/glog_z_unit_rotate_test.go b/os/glog/glog_z_unit_rotate_test.go
index 941af4280..a7dbefeae 100644
--- a/os/glog/glog_z_unit_rotate_test.go
+++ b/os/glog/glog_z_unit_rotate_test.go
@@ -20,7 +20,7 @@ import (
 func Test_Rotate_Size(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		l := glog.New()
-		p := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		p := gfile.TempDir(gtime.TimestampNanoStr())
 		err := l.SetConfigWithMap(g.Map{
 			"Path":                 p,
 			"File":                 "access.log",
@@ -58,7 +58,7 @@ func Test_Rotate_Size(t *testing.T) {
 func Test_Rotate_Expire(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		l := glog.New()
-		p := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		p := gfile.TempDir(gtime.TimestampNanoStr())
 		err := l.SetConfigWithMap(g.Map{
 			"Path":                 p,
 			"File":                 "access.log",
diff --git a/os/gproc/gproc_comm.go b/os/gproc/gproc_comm.go
index e654325b5..1e81c1ee1 100644
--- a/os/gproc/gproc_comm.go
+++ b/os/gproc/gproc_comm.go
@@ -43,7 +43,7 @@ var (
 	commReceiveQueues = gmap.NewStrAnyMap(true)
 
 	// commPidFolderPath specifies the folder path storing pid to port mapping files.
-	commPidFolderPath = gfile.Join(gfile.TempDir(), "gproc")
+	commPidFolderPath = gfile.TempDir("gproc")
 )
 
 func init() {
diff --git a/os/gres/gres_unit_1_test.go b/os/gres/gres_unit_1_test.go
index f7b88b0fa..5c185b936 100644
--- a/os/gres/gres_unit_1_test.go
+++ b/os/gres/gres_unit_1_test.go
@@ -44,7 +44,7 @@ func Test_Pack(t *testing.T) {
 func Test_PackToFile(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		srcPath := gdebug.TestDataPath("files")
-		dstPath := gfile.Join(gfile.TempDir(), gtime.TimestampNanoStr())
+		dstPath := gfile.TempDir(gtime.TimestampNanoStr())
 		err := gres.PackToFile(srcPath, dstPath)
 		t.Assert(err, nil)
 
diff --git a/os/gsession/gsession_storage_file.go b/os/gsession/gsession_storage_file.go
index a5063abd5..44363d7f9 100644
--- a/os/gsession/gsession_storage_file.go
+++ b/os/gsession/gsession_storage_file.go
@@ -35,7 +35,7 @@ type StorageFile struct {
 }
 
 var (
-	DefaultStorageFilePath          = gfile.Join(gfile.TempDir(), "gsessions")
+	DefaultStorageFilePath          = gfile.TempDir("gsessions")
 	DefaultStorageFileCryptoKey     = []byte("Session storage file crypto key!")
 	DefaultStorageFileCryptoEnabled = false
 	DefaultStorageFileLoopInterval  = 10 * time.Second