set namespace when fork child process

output/namespace.go

@@ -0,0 +1,25 @@
+// Copyright (c) 2014, B3log
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !linux
+
+package output
+
+import (
+	"os/exec"
+)
+
+func setNamespace(cmd *exec.Cmd) {
+	// do nothing
+}

output/namespace_linux.go

@@ -16,12 +16,10 @@ package output
 
 import (
 	"os/exec"
+	"syscall"
 )
 
-type linuxNS struct {
-}
-
-func (*linuxNS) set(cmd *exec.Cmd) {
+func setNamespace(cmd *exec.Cmd) {
 	// XXX: keep move with Go 1.4 and later's
 
 	cmd.SysProcAttr = &syscall.SysProcAttr{}

output/outputs.go

@@ -54,11 +54,6 @@ type Lint struct {
 	Msg      string `json:"msg"`
 }
 
-// namespace sets a namespace for child process, namespace just works on Linux.
-type namespace interface {
-	set(cmd *exec.Cmd)
-}
-
 // WSHandler handles request of creating output channel.
 func WSHandler(w http.ResponseWriter, r *http.Request) {
 	sid := r.URL.Query()["sid"][0]
@@ -102,9 +97,7 @@ func RunHandler(w http.ResponseWriter, r *http.Request) {
 	cmd.Dir = curDir
 
 	if conf.Docker {
-		var ns namespace
-
-		ns.set(cmd)
+		setNamespace(cmd)
 	}
 
 	stdout, err := cmd.StdoutPipe()