pkg/systemd: Drop our copy-pasted version of go-systemd/activation

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)

systemd/activation/files.go

@@ -1,55 +0,0 @@
-/*
-Copyright 2013 CoreOS Inc.
-
-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.
-*/
-// Package activation implements primitives for systemd socket activation.
-package activation
-
-import (
-	"os"
-	"strconv"
-	"syscall"
-)
-
-// based on: https://gist.github.com/alberts/4640792
-const (
-	listenFdsStart = 3
-)
-
-func Files(unsetEnv bool) []*os.File {
-	if unsetEnv {
-		// there is no way to unset env in golang os package for now
-		// https://code.google.com/p/go/issues/detail?id=6423
-		defer os.Setenv("LISTEN_PID", "")
-		defer os.Setenv("LISTEN_FDS", "")
-	}
-
-	pid, err := strconv.Atoi(os.Getenv("LISTEN_PID"))
-	if err != nil || pid != os.Getpid() {
-		return nil
-	}
-
-	nfds, err := strconv.Atoi(os.Getenv("LISTEN_FDS"))
-	if err != nil || nfds == 0 {
-		return nil
-	}
-
-	var files []*os.File
-	for fd := listenFdsStart; fd < listenFdsStart+nfds; fd++ {
-		syscall.CloseOnExec(fd)
-		files = append(files, os.NewFile(uintptr(fd), "LISTEN_FD_"+strconv.Itoa(fd)))
-	}
-
-	return files
-}

systemd/activation/listeners.go

@@ -1,37 +0,0 @@
-/*
-Copyright 2014 CoreOS Inc.
-
-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.
-*/
-package activation
-
-import (
-	"fmt"
-	"net"
-)
-
-// Listeners returns net.Listeners for all socket activated fds passed to this process.
-func Listeners(unsetEnv bool) ([]net.Listener, error) {
-	files := Files(unsetEnv)
-	listeners := make([]net.Listener, len(files))
-
-	for i, f := range files {
-		var err error
-		listeners[i], err = net.FileListener(f)
-		if err != nil {
-			return nil, fmt.Errorf("Error setting up FileListener for fd %d: %s", f.Fd(), err.Error())
-		}
-	}
-
-	return listeners, nil
-}

systemd/listendfd.go

@@ -5,7 +5,7 @@ import (
 	"net"
 	"strconv"
 
-	"github.com/dotcloud/docker/pkg/systemd/activation"
+	"github.com/coreos/go-systemd/activation"
 )
 
 // ListenFD returns the specified socket activated files as a slice of